Trestle platform lifting oil cylinder

Abstract

The utility model discloses a trestle platform lifting oil cylinder which comprises a cylinder barrel, a piston rod is arranged in the cylinder barrel, an end cover is arranged at the front end of the cylinder barrel, and the trestle platform lifting oil cylinder is characterized in that a dustproof ring is embedded in the inner side of the end cover, an ice scraper is arranged in a gap of the outer side of the dustproof ring, and the ice scraper is pressed on the end cover through a pressing cover. A groove is formed in the ice scraper, a drainage groove is formed in the gland, and a drainage channel is formed by the drainage groove, the groove and a gap between the dustproof ring and the ice scraper. By means of the mode, the trestle platform lifting oil cylinder can utilize the vertical working state of the trestle oil cylinder and is matched with the drainage channel to automatically drain accumulated water, the corrosion resistance of the surface of the piston rod is improved, the service life of the oil cylinder is prolonged, and the risk that the oil cylinder loses efficacy due to the fact that a sealing ring is damaged is directly avoided.

Description

Technical Field

[0001] The utility model relates to the field of oil cylinders, in particular to a trestle platform lifting oil cylinder. Background Art

[0002] The trestle is a bridge structure for vehicles to drive onto the ferry. The oil cylinder is used for vertical lifting of the trestle platform. The marine open-air environment is highly corrosive. The oil cylinder must have an ice scraping function. The piston rod is exposed and does not move for a long time, which lasts for at least 2 to 3 months, and as long as half a year or more. The lifting cylinder needs to be kept in a completely vertical state at 90°, so it is easy for water to accumulate in the internal groove. Most of the trestle cylinders are used in coastal ports, with heavy rain and foggy weather, and high water salinity. In this case, water is easily accumulated and the dust ring may be corroded. Damage to the dust ring may lead to the entry of external impurities, resulting in dangerous consequences such as contamination of hydraulic oil and cylinder pulling.

[0003] For special working conditions such as lifting cylinders that need to be in a completely 90° vertical state and the piston rod needs to be kept extended for a long time, since the cylinder is exposed for a long time, external rainwater is easy to accumulate on the end face of the cylinder. The marine environment is highly corrosive and rainwater cannot be discharged, resulting in corrosion on the surface of the piston rod.

[0004] The conventional sealing structure is an ice scraper plus a dust ring. This structure will cause water to accumulate in the gap between the dust ring and the ice scraper. Over time, the highly corrosive accumulated water will corrode the surface of the piston rod. The conventional oil cylinder dust ring structure is not suitable for the working conditions of the lifting cylinder, and water is prone to accumulation. Utility Model Content

[0005] The main technical problem solved by the utility model is to provide a trestle platform lifting cylinder, which can utilize the vertical working state of the trestle cylinder and cooperate with the drainage channel to autonomously discharge accumulated water, thereby improving the corrosion resistance of the piston rod surface and the service life of the cylinder, and directly avoiding the risk of cylinder failure due to damage to the sealing ring.

[0006] In order to solve the above technical problems, a technical solution adopted by the utility model is: to provide a pier platform lifting cylinder, including a cylinder barrel, a piston rod is arranged in the cylinder barrel, an end cover is arranged at the front end of the cylinder barrel, a dust ring is embedded in the inner side of the end cover, an ice scraper is arranged in the outer gap of the dust ring, the ice scraper is pressed on the end cover by a pressure cover, a groove is provided on the ice scraper, a drainage groove is provided on the pressure cover, and the drainage groove, the groove and the gap between the dust ring and the ice scraper form a drainage channel.

[0007] In a preferred embodiment of the utility model, the groove is provided on the inner wall of the outer side of the ice scraper, and the groove forms a drainage gap between the pressure cover and the end cover.

[0008] In a preferred embodiment of the utility model, the accumulated water in the gap between the dust ring and the ice scraper flows to the end surface of the end cover through the groove, and flows along the end surface of the end cover to the drainage groove and then is discharged.

[0009] In a preferred embodiment of the utility model, a gap is formed between the lower end of the ice scraper and the dust ring, and the accumulated water in the gap is discharged along the groove.

[0010] In a preferred embodiment of the present invention, a mounting groove is provided on the inner side of the pressure cover, and the outer side of the ice scraper is embedded in the mounting groove.

[0011] In a preferred embodiment of the present invention, the glands are spaced apart from each other, and the gaps between the glands form drainage grooves.

[0012] In a preferred embodiment of the utility model, the pressure cover is a split arc-shaped pressure cover, which is connected to the end cover by screws and presses the ice scraper tightly.

[0013] In a preferred embodiment of the present invention, the dust ring is installed in a groove of the end cover, and the dust ring is aligned with the groove.

[0014] The beneficial effects of the utility model are as follows: the utility model trestle platform lifting cylinder forms a complete drainage channel through the drainage groove, the groove and the gap between the dust ring and the ice scraper. In conjunction with the vertical working state of the lifting cylinder, the accumulated water between the dust ring and the ice scraper is automatically discharged through the drainage channel under the action of gravity, thereby avoiding the phenomenon of water accumulation and improving the corrosion resistance of the piston rod surface and the service life of the cylinder.

[0015] The utility model provides a lifting oil cylinder for the trestle platform, and an ice scraper is positioned by a pressure cover and an end cover, and is easy to install. A drainage groove is formed between the split end covers to facilitate the drainage of accumulated water, thereby ensuring that the drainage channel is unobstructed.

[0016] The utility model discloses a trestle platform lifting oil cylinder, shortens the installation gap between the dustproof ring and the end cover, avoids the accumulation of water inside the dustproof ring and the end cover, and avoids the risk of oil cylinder failure due to damage to the sealing ring. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative work, among which:

[0018] Figure 1 It is a structural schematic diagram of a preferred embodiment of the utility model trestle platform lifting cylinder;

[0019] Figure 2 yes Figure 1 Schematic diagram of the local structure;

[0020] Figure 3 It is a schematic diagram of the structure of the gland;

[0021] Figure 4 It is a partial structural schematic diagram of an ice scraper;

[0022] Figure 5 It is a schematic diagram of the existing sealing structure;

[0023] The markings of the components in the accompanying drawings are as follows: 1. cylinder barrel, 2. piston rod, 3. end cover, 4. dust ring, 5. ice scraper, 6. gland, 7. screw, 8. groove. DETAILED DESCRIPTION

[0024] The technical scheme in the embodiment of the utility model will be described clearly and completely below. The structure, proportion, size, etc. illustrated in the drawings of this specification are only used to match the content disclosed in the specification, so that people familiar with this technology can understand and read, and are not used to limit the limiting conditions that can be implemented in the utility model, so they have no technical substantive significance. Any modification of the structure, change of the proportional relationship or adjustment of the size, without affecting the effect that can be produced by the utility model and the purpose that can be achieved, should still fall within the scope of the technical content disclosed in the utility model. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and so on quoted in this specification are only for the convenience of narration, and are not used to limit the scope that can be implemented. The change or adjustment of its relative relationship should also be regarded as the scope that can be implemented in the utility model without substantially changing the technical content.

[0025] See also Figures 1 to 4 A trestle platform lifting cylinder includes a cylinder barrel 1, a piston rod 2 is arranged in the cylinder barrel 1, and an end cover 3 is arranged at the front end of the cylinder barrel 1. A dust ring 4 is embedded in the inner side of the end cover 3. The dust ring 4 is installed in the groove of the end cover 3, and the dust ring 4 is aligned with the groove. Compared with the existing sealing structure, the present application shortens the length of the groove of the end cover 3. After the dust ring 4 and the end cover 3 are assembled in place, the right end face of the dust ring 4 is flush with the end face of the end cover 3, so that accumulated water can be prevented from being pushed into the groove of the end cover 3.

[0026] An ice scraper 5 is provided in the outer gap of the dust ring 4, and the ice scraper 5 is pressed on the end cover 3 through a gland 6. A mounting groove is provided on the inner side of the gland 6, and the outer side of the ice scraper 5 is embedded in the mounting groove. The gland 6 is a split arc gland, which is connected to the end cover 3 through screws 7 and presses the ice scraper 5. The number of glands 6 can be 2 or more, and preferably, the number of glands 6 is 3. A plurality of screw 7 holes are provided on the gland 6, and the screws 7 are screwed into the end cover 3 to fix the gland 6.

[0027] A groove 8 is provided on the ice scraper 5. The groove 8 is provided on the inner wall of the outer side of the ice scraper 5. The number of the grooves 8 can be multiple. A gap is formed between the ice scraper 5 and the end cover 3 and the pressure cover 6 through the groove 8. A gap is formed between the lower end of the ice scraper 5 and the dust ring 4, so that the accumulated water in the gap can be discharged along the groove 8.

[0028] The pressure cover 6 is provided with drainage grooves, and the pressure covers 6 are arranged at intervals, and the gaps between the pressure covers 6 form drainage grooves. The drainage grooves, the grooves 8, and the gaps between the dust ring 4 and the ice scraper 5 form a drainage channel. The accumulated water in the gap between the dust ring 4 and the ice scraper 5 flows to the end face of the end cover 3 through the grooves 8, and flows along the end face of the end cover 3 to the drainage grooves and then is discharged. The lifting cylinder needs to maintain a completely vertical state of 90°. When water accumulates in the gap between the ice scraper 5 and the dust ring 4, due to the influence of gravity, the accumulated water first flows from the gap along the grooves 8 to the end face of the end cover, and then flows from the drainage grooves to the outside of the cylinder. The accumulated water flows to the following directions: Figure 2 As shown by the middle arrow, water accumulation is avoided inside, which can greatly improve the corrosion resistance of the piston rod 2 surface and the service life of the oil cylinder, and directly avoid the risk of oil cylinder failure due to damage to the sealing ring.

[0029] Different from the prior art, the utility model of the trestle platform lifting cylinder can utilize the vertical working state of the trestle cylinder and cooperate with the drainage channel to autonomously discharge the accumulated water, thereby improving the corrosion resistance of the piston rod surface and the service life of the cylinder, and directly avoiding the risk of cylinder failure due to damage to the sealing ring.

[0030] The above schematically describes the present invention and its implementation methods, which are not restrictive. The drawings show only one implementation method of the present invention, and the actual structure is not limited thereto. Therefore, if ordinary technicians in this field are inspired by it and design structural methods and embodiments similar to the technical solution without creativity without departing from the purpose of the present invention, they should all fall within the protection scope of the present invention.

Claims

1. A trestle platform lifting cylinder, comprising a cylinder barrel (1), a piston rod (2) being arranged in the cylinder barrel (1), and an end cover (3) being arranged at the front end of the cylinder barrel (1), characterized in that: A dust ring is embedded inside the end cover (3), an ice scraper (5) is provided in the gap outside the dust ring, the ice scraper (5) is pressed onto the end cover (3) via a pressure cover (6), a groove (8) is provided on the ice scraper (5), a drainage groove is provided on the pressure cover (6), and the drainage groove, the groove (8) and the gap between the dust ring and the ice scraper (5) form a drainage channel.

2. The trestle platform lifting cylinder according to claim 1, characterized in that: The groove (8) is formed on the inner wall of the outer side of the ice scraper (5), and a drainage gap is formed between the pressure cover (6) and the end cover (3) by the groove (8).

3. The trestle platform lifting cylinder according to claim 2, characterized in that: The accumulated water in the gap between the dust ring (4) and the ice scraper (5) flows through the groove (8) to the end surface of the end cover (3), flows along the end surface of the end cover (3) to the drainage groove, and is then discharged.

4. The trestle platform lifting cylinder according to claim 3, characterized in that: A gap is formed between the lower end of the ice scraper (5) and the dust ring (4), and the accumulated water in the gap is discharged along the groove (8).

5. The trestle platform lifting cylinder according to any one of claims 1 to 4, characterized in that: The inner side of the pressure cover (6) is provided with a mounting groove, and the outer side of the ice scraper (5) is embedded in the mounting groove.

6. The trestle platform lifting cylinder according to claim 5, characterized in that: The pressure covers (6) are arranged at intervals, and the gaps between the pressure covers (6) form drainage grooves.

7. The trestle platform lifting cylinder according to claim 6, characterized in that: The pressure cover (6) is a split arc-shaped pressure cover (6), and the pressure cover (6) is connected to the end cover (3) via screws (7) and presses the ice scraper (5) tightly.

8. The trestle platform lifting cylinder according to claim 1, characterized in that: The dust ring (4) is installed in a groove of the end cover (3), and the dust ring (4) is aligned with the groove.

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