Novel multi-stage oil cylinder automatic exhaust structure

Abstract

The utility model discloses a novel multi-stage oil cylinder automatic exhaust structure in the field of oil cylinders, which comprises an oil cylinder barrel body, a bottom plate is arranged at the upper end of the oil cylinder barrel body, a self-exhaust piston rod is axially arranged in the oil cylinder barrel body, and the self-exhaust piston rod comprises a piston rod barrel body. A first sealing plate and a second sealing plate which are vertically distributed at intervals are arranged in the piston rod cylinder, mounting holes are formed in the middle of the first sealing plate and the middle of the second sealing plate, a communicating pipe is arranged between the first sealing plate and the second sealing plate, and the upper end and the lower end of the communicating pipe are fixed to the inner walls of the mounting holes of the first sealing plate and the second sealing plate respectively. The lower end of the self-exhausting piston rod extends out of the oil cylinder barrel, a threaded hole is reserved in the piston rod barrel and located below the second sealing plate, the lower end of the piston rod barrel is fixedly connected with a connecting lug ring inserted into the threaded hole, an oil channel is formed in the connecting lug ring, and the oil channel is communicated with the interior of the communicating pipe through the threaded hole. According to the utility model, automatic exhaust can be realized, the working efficiency is improved, and the potential safety hazard of operation is reduced.

Description

Technical Field

[0001] The utility model belongs to the field of dump truck oil cylinders, and particularly relates to a novel multi-stage oil cylinder automatic exhaust structure. Background Art

[0002] When a single-earring inverted front-lift cylinder is used for the first time, air will remain in the cylinder, causing the cylinder to shake during operation. The traditional cylinder structure will install an air bleed valve on the top, and manual exhaust will be performed during the trial operation. The disadvantages are: difficult and cumbersome operation, there is a risk of oil leakage, and additional work and risks for the operator. Utility Model Content

[0003] The purpose of the utility model is to provide a novel multi-stage oil cylinder automatic exhaust structure, which can automatically exhaust the air without machining the exhaust holes, thus avoiding the risk of oil leakage; the operator does not need to climb the work vehicle where the oil cylinder is located to perform manual exhaust, thereby improving work efficiency and reducing operational safety hazards.

[0004] The purpose of the utility model is achieved as follows: a novel multi-stage oil cylinder automatic exhaust structure, including an oil cylinder body, a bottom plate is provided at the upper end of the oil cylinder body, a self-exhaust piston rod is axially provided inside the oil cylinder body, the self-exhaust piston rod includes a piston rod cylinder, a sealing plate 1 and a sealing plate 2 are arranged inside the piston rod cylinder, and the sealing plate 1 and the sealing plate 2 are arranged at intervals from top to bottom. The middle parts of the sealing plate 1 and the sealing plate 2 are provided with mounting holes, a connecting pipe is provided between the sealing plate 1 and the sealing plate 2, and the upper and lower ends of the connecting pipe are respectively fixed to the inner walls of the mounting holes of the sealing plate 1 and the sealing plate 2, the lower end of the self-exhaust piston rod extends out of the oil cylinder body, a threaded hole is left in the piston rod cylinder below the sealing plate 2, a connecting earring inserted into the threaded hole is fixedly connected to the lower end of the piston rod cylinder, an oil channel is provided in the connecting earring, and the oil channel is connected with the inside of the connecting pipe through the threaded hole.

[0005] The automatic exhaust structure of the utility model is composed of a connecting steel pipe and two sealing plates. The automatic exhaust structure is installed in the multi-stage cylinder as a piston rod. The self-exhaust piston rod of the oil cylinder is fixed, and the oil cylinder barrel of the multi-stage cylinder is movable. During operation, the hydraulic oil enters the connecting pipe through the oil channel, and then enters the top of the sealing plate, pushing the oil cylinder barrel of the multi-stage cylinder to extend. When the oil cylinder extends, the air will flow to the top of the oil cylinder with the oil; when the oil cylinder retracts, due to the small oil aperture of the automatic exhaust assembly, the flow rate of the oil will increase rapidly, and the air therein will flow into the oil return pipeline. Compared with the prior art, the beneficial effects of the utility model are: it can automatically exhaust, without the need to process the exhaust hole, avoiding the risk of oil leakage; the operator does not need to climb the working vehicle where the oil cylinder is located to perform manual exhaust, which improves work efficiency and reduces operational safety hazards. The automatic exhaust structure of the utility model can be widely used in multi-stage cylinders of various structural forms.

[0006] As a further improvement of the present invention, the outer periphery of the piston rod barrel matches the inner wall of the oil cylinder barrel.

[0007] As a further improvement of the utility model, the sealing plate 1 and the sealing plate 2 are both circular, the connecting pipe is a steel pipe, and the connecting pipe coincides with the axis of the piston rod cylinder.

[0008] As a further improvement of the utility model, the connecting earring is fixed to the piston rod cylinder by threaded connection, and a gap is left between the connecting earring and the second sealing plate. The hydraulic oil is connected to the pipe through the gap.

[0009] As a further improvement of the utility model, the oil channel is L-shaped. The L-shaped oil channel is convenient for hydraulic oil to enter.

[0010] As a further improvement of the utility model, the oil cylinder barrel is an oil cylinder barrel of a multi-stage cylinder. The oil cylinder barrel of the multi-stage cylinder extends out step by step in sequence.

[0011] As a further improvement of the utility model, a dust cap is provided on the top of the oil cylinder body, which can prevent dust. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 A cross-sectional view of a self-exhaust piston rod.

[0013] Figure 2 It is a three-dimensional structural diagram of half of the self-exhaust piston rod.

[0014] Figure 3 It is a structural schematic diagram of the utility model.

[0015] Among them, 1 is the cylinder body, 2 is the bottom plate, 3 is the self-exhaust piston rod, 301 is the piston rod body, 302 is the sealing plate one, 303 is the sealing plate two, 4 is the mounting hole, 5 is the connecting pipe, 6 is the threaded hole, 7 is the connecting earring, 8 is the oil channel, and 9 is the dust cap. DETAILED DESCRIPTION

[0016] like Figure 1-3As shown, a novel multi-stage oil cylinder automatic exhaust structure comprises an oil cylinder body 1, a bottom plate 2 is arranged at the upper end of the oil cylinder body 1, a self-exhaust piston rod 3 is axially arranged inside the oil cylinder body 1, and the self-exhaust piston rod 3 comprises a piston rod body 301, and the outer periphery of the piston rod body 301 matches with the inner wall of the oil cylinder body 1; a sealing plate 1 302 and a sealing plate 2 303 are arranged inside the piston rod body 301, and the sealing plate 1 302 and the sealing plate 2 303 are both provided with mounting holes 4 in the middle part, and a connecting pipe 5 is arranged between the sealing plate 1 302 and the sealing plate 2 303, so as to connect The upper and lower ends of the tube 5 are respectively fixed to the inner walls of the mounting holes 4 of the sealing plate 1 302 and the sealing plate 2 303. The sealing plate 1 302 and the sealing plate 2 303 are both circular. The connecting tube 5 is a steel tube. The connecting tube 5 coincides with the axis of the piston rod cylinder 301. The lower end of the exhaust piston rod 3 extends out of the oil cylinder cylinder 1. A threaded hole 6 is left in the piston rod cylinder 301 below the sealing plate 2 303. A connecting earring 7 inserted into the threaded hole 6 is fixedly connected to the lower end of the piston rod cylinder 301. An oil channel 8 is opened in the connecting earring 7. The oil channel 8 is connected to the inside of the connecting tube 5 through the threaded hole 6. The connecting earring 7 is fixed to the piston rod cylinder 301 by threaded connection, and a gap is left between the connecting earring 7 and the sealing plate 2 303. The hydraulic oil is connected to the connecting tube 5 through the gap. The oil channel 8 is L-shaped. The L-shaped oil channel 8 is convenient for the hydraulic oil to enter.

[0017] The oil cylinder barrel 1 is the oil cylinder barrel 1 of a multi-stage cylinder. The oil cylinder barrel 1 of the multi-stage cylinder extends out step by step in sequence.

[0018] A dust cap 9 is provided on the top of the oil cylinder barrel body 1. The dust cap 9 can prevent dust.

[0019] The automatic exhaust structure of the utility model is composed of a connecting steel pipe and two sealing plates. The automatic exhaust structure is installed in the multi-stage cylinder as a piston rod. The self-exhaust piston rod 3 of the oil cylinder is fixed, and the oil cylinder barrel 1 of the multi-stage cylinder is movable. During operation, the hydraulic oil enters the connecting pipe 5 through the oil channel 8, and then enters the top of the sealing plate 302, pushing the oil cylinder barrel 1 of the multi-stage cylinder to extend. When the oil cylinder extends, the air will flow to the top of the oil cylinder with the oil; when the oil cylinder retracts, since the oil hole diameter of the automatic exhaust assembly is very small, the flow rate of the oil will increase rapidly, and the air therein will flow into the return oil pipeline. The advantages of the utility model are: it can automatically exhaust, no need to process the exhaust hole, avoiding the risk of oil leakage; the operator does not need to climb the working vehicle where the oil cylinder is located to perform manual exhaust, which improves work efficiency and reduces operational safety hazards. The automatic exhaust structure of the utility model can be widely used in multi-stage cylinders of various structural forms.

[0020] The present utility model is not limited to the above-mentioned embodiments. On the basis of the technical solution disclosed in the present utility model, technicians in this field can make some substitutions and deformations to some technical features therein according to the disclosed technical content without creative labor, and these substitutions and deformations are all within the protection scope of the present utility model.

Claims

1. A novel multi-stage oil cylinder automatic exhaust structure, comprising an oil cylinder body, the upper end of which is provided with a bottom plate, characterized in that: A self-exhaust piston rod is axially provided inside the cylinder barrel body, and the self-exhaust piston rod includes a piston rod barrel body, and a sealing plate 1 and a sealing plate 2 are arranged inside the piston rod barrel body, and sealing plates 1 and 2 are spaced apart from each other. The middle parts of sealing plates 1 and 2 are provided with mounting holes, and a connecting pipe is provided between sealing plates 1 and 2, and the upper and lower ends of the connecting pipe are respectively fixed to the inner walls of the mounting holes of sealing plates 1 and 2. The lower end of the self-exhaust piston rod extends out of the cylinder barrel body, and a threaded hole is left in the piston rod barrel body below the sealing plate 2. A connecting earring inserted into the threaded hole is fixedly connected to the lower end of the piston rod barrel body, and an oil channel is provided in the connecting earring, and the oil channel is connected to the inside of the connecting pipe through the threaded hole.

2. A novel multi-stage oil cylinder automatic exhaust structure according to claim 1, characterized in that: The outer periphery of the piston rod barrel matches with the inner wall of the oil cylinder barrel.

3. A novel multi-stage oil cylinder automatic exhaust structure according to claim 1 or 2, characterized in that: The sealing plate 1 and the sealing plate 2 are both circular, the connecting pipe is a steel pipe, and the connecting pipe coincides with the axis of the piston rod cylinder.

4. A novel multi-stage oil cylinder automatic exhaust structure according to claim 1 or 2, characterized in that: The connecting earring is fixed to the piston rod cylinder through threaded connection, and a distance is left between the connecting earring and the second sealing plate.

5. A novel multi-stage oil cylinder automatic exhaust structure according to claim 1 or 2, characterized in that: The oil channel is L-shaped.

6. A novel multi-stage oil cylinder automatic exhaust structure according to claim 1 or 2, characterized in that: The oil cylinder barrel is an oil cylinder barrel of a multi-stage cylinder.

7. A novel multi-stage oil cylinder automatic exhaust structure according to claim 1 or 2, characterized in that: A dust cap is provided on the top of the oil cylinder body.

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