Piston capable of being quickly positioned

Abstract

The utility model relates to the technical field of pistons, and discloses a piston capable of being quickly positioned, which comprises a piston top cover, a piston barrel fixed above the piston top cover, a hexagon bolt fixed on the piston top cover, a piston barrel fixed at the end point of the hexagon bolt, a positioning device arranged above the piston top cover, and a positioning device arranged on the piston top cover. The piston barrel is provided with an airtight device, the airtight device comprises an extrusion rod, the extrusion rod slides in a notch of the piston barrel, and an annular air plug is fixed to the end point of the extrusion rod. The screw holes between the piston barrel and the piston top cover are aligned, alignment of the screw holes does not need to be controlled through eyes, screw loose caused by installation dislocation caused by hand shaking is reduced, the fixing strength of the piston during installation is reduced, and meanwhile the installation speed between the piston barrel and the piston top cover is increased.

Description

Technical Field

[0001] This utility model relates to the field of piston technology, specifically to a piston with quick positioning. Background Technology

[0002] Ships are a general term for all kinds of vessels. A ship is a means of transportation that can navigate or anchor in waterways for transport or operations, and its technical performance, equipment, and structural forms vary according to different usage requirements. Ships undergo processing before use, and ships have many structural components, among which the piston is one such component.

[0003] Existing pistons, after prolonged use, will suffer severe wear and damage. When replacing or maintaining a damaged piston, inaccurate alignment of the bolt holes during manual installation and positioning can lead to stripping of the bolts and bolt holes, wasting installation time and affecting the piston's fixing strength and installation efficiency. Utility Model Content

[0004] The purpose of this invention is to provide a piston that allows for quick positioning, in order to solve the problems mentioned in the background section.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a piston with quick positioning, comprising a piston top cover, a piston cylinder fixed above the piston top cover, a hexagonal bolt fixed on the piston top cover, the piston cylinder fixed to the end of the hexagonal bolt, a positioning device provided above the piston top cover, and an airtight device provided on the piston cylinder, the positioning device comprising:

[0006] The positioning groove is formed on the lower part of the inner wall of the piston cylinder.

[0007] Preferably, the positioning block is fixed to the upper outer wall of the piston top cover. When the piston top cover and piston cylinder are installed and positioned, the piston cylinder is pressed and rotated above the piston top cover from below, so that the positioning block rotates to the positioning groove and continues to rotate to the limit. Under the action of pressure, the piston cylinder slides downward on the piston top cover, so that the threaded holes on the piston cylinder and piston top cover are aligned, making the subsequent installation of hexagonal bolts more convenient and quick.

[0008] Preferably, the airtight device includes: a compression rod, which slides within a groove in the piston cylinder, and an annular air plug is fixed to the end of the compression rod.

[0009] Preferably, the piston cylinder has an annular gas box, and the annular gas plug slides inside the annular gas box.

[0010] Preferably, a sliding spring slides on the extrusion rod, one end of the sliding spring is fixed below the annular air plug, and the other end of the sliding spring is fixed to the bottom of the annular air box.

[0011] Preferably, an air pipe is fixedly connected to the upper wall of the annular gas box, and an annular air bladder is fixed to the end of the air pipe. The air pipe is fixed in a groove on the piston cylinder, and the annular air bladder is fixed above the inner wall of the groove on the piston cylinder. When the piston cylinder rotates on the piston top cover to the limit and slides downward, the positioning block squeezes the squeezing rod, causing the squeezing rod to move upward with the annular air plug. The upward movement of the annular air plug squeezes the gas in the annular gas box. Under compression, the gas flows from the air pipe into the annular air bladder, causing the annular air bladder to expand. The expansion of the annular air bladder causes its edge to fit against the piston top cover, ensuring airtightness after the piston top cover and piston cylinder are fixed in the position.

[0012] Compared with the prior art, this utility model provides a piston with quick positioning, which has the following beneficial effects:

[0013] 1. This quick-positioning piston is equipped with a positioning device. When the piston cylinder is rotated and pressed down, the positioning groove moves downward relative to the positioning block, and the screw holes between the piston cylinder and the piston top cover are aligned. There is no need to control the alignment of the screw holes by eye, which reduces the stripping caused by misalignment during installation due to hand tremors, reduces the piston and fixing strength during installation, and also speeds up the installation speed between the piston cylinder and the piston top cover.

[0014] 2. The quick-positioning piston is equipped with an airtight device. When the piston cylinder moves downward, the positioning block squeezes the squeezing rod, causing the annular air plug to squeeze the air in the annular air box, and causing the annular air bladder to expand and fit the interface. This prevents the contents of the cylinder from flowing out of the gap between the piston cylinder and the piston top cover during the reciprocating motion of the piston, thereby reducing energy loss and increasing work efficiency. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 This is a schematic cross-sectional view of the overall structure of this utility model;

[0017] Figure 3 This is a schematic cross-sectional view of part of the structure of this utility model;

[0018] Figure 4 This is a partial structural diagram of the present utility model.

[0019] In the diagram: 1. Piston top cover; 2. Piston cylinder; 3. Hex bolt; 4. Positioning device; 5. Airtight device; 401. Positioning groove; 402. Positioning block; 501. Extrusion rod; 502. Annular air plug; 503. Annular air box; 504. Sliding spring; 505. Air pipe; 506. Annular air bladder. Detailed Implementation

[0020] like Figures 1-4As shown, this utility model provides a technical solution: a piston with quick positioning, including a piston top cover 1, a piston cylinder 2 fixed above the piston top cover 1, a hexagonal bolt 3 fixed on the piston top cover 1, the piston cylinder 2 fixed at the end of the hexagonal bolt 3, a positioning device 4 provided above the piston top cover 1, and an airtight device 5 provided on the piston cylinder 2. The positioning device 4 includes: a positioning groove 401, which is opened below the inner wall of the piston cylinder 2, and a positioning block 402 fixed on the upper outer wall of the piston top cover 1. When the piston cylinder 2 is rotated and pressed down, the positioning groove 401 moves downward relative to the positioning block 402, and the screw holes between the piston cylinder 2 and the piston top cover 1 are aligned. It is no longer necessary to control the alignment of the screw holes by eye, reducing the stripping caused by installation misalignment due to hand tremors, reducing the fixing strength of the piston during installation, and at the same time speeding up the installation speed between the piston cylinder 2 and the piston top cover 1.

[0021] The airtight device 5 includes: a compression rod 501, which slides within a groove in the piston cylinder 2; an annular air plug 502 is fixed to the end of the compression rod 501; an annular air box 503 is provided on the piston cylinder 2; the annular air plug 502 slides within the annular air box 503; a sliding spring 504 slides on the compression rod 501; one end of the sliding spring 504 is fixed below the annular air plug 502; the other end of the sliding spring 504 is fixed to the bottom of the annular air box 503; and an air pipe 5 is fixedly connected to the upper wall of the annular air box 503. 05. An annular air bladder 506 is fixed to the end of the air pipe 505. The air pipe 505 is fixed in the groove on the piston cylinder 2. The annular air bladder 506 is fixed above the inner wall of the groove on the piston cylinder 2. When the piston cylinder 2 moves downward, the positioning block 402 squeezes the squeezing rod 501, causing the annular air plug 502 to squeeze the air in the annular air box 503, causing the annular air bladder 506 to expand and fit the interface. This prevents the contents of the cylinder from flowing out of the gap between the piston cylinder 2 and the piston top cover 1 during the reciprocating motion of the piston, reducing energy loss and increasing working efficiency.

[0022] Working principle: When the piston top cover 1 and piston cylinder 2 are installed and positioned, the piston cylinder 2 is pressed and rotated from below onto the piston top cover 1, causing the positioning block 402 to rotate into the positioning groove 401. It continues to rotate to the limit. Under pressure, the piston cylinder 2 slides downward on the piston top cover 1, so that the threaded holes on the piston cylinder 2 and the piston top cover 1 are aligned, making the subsequent installation of the hexagonal bolt 3 more convenient and quick.

[0023] When the piston cylinder 2 rotates on the piston top cover 1 and slides downward at the limit, the positioning block 402 squeezes the compression rod 501, causing the compression rod 501 to move upward with the annular air plug 502. The annular air plug 502 moves upward and squeezes the gas in the annular air box 503. Under compression, the gas flows from the air pipe 505 into the annular air bladder 506, causing the annular air bladder 506 to expand. The expansion of the annular air bladder 506 causes its edge to fit against the piston top cover 1, thus ensuring airtightness after the piston top cover 1 and the piston cylinder 2 are fixed in the position.

[0024] The present invention has been described in detail above. However, modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, any modifications or improvements that do not depart from the spirit of the present invention are within the protection scope of the present invention.

Claims

1. A quick positioning piston comprising a piston head cover (1), characterized in that: The upper of piston top cover (1) is fixed with piston cylinder (2), the piston top cover (1) is fixed with hexagonal bolt (3), the endpoint of hexagonal bolt (3) is fixed with piston cylinder (2), the upper of piston top cover (1) is equipped with positioning device (4), the piston cylinder (2) is equipped with air-tight device (5), the positioning device (4) includes: Positioning groove (401), the positioning groove (401) is opened in the lower of piston cylinder (2) inner wall.

2. A rapid positioning piston according to claim 1, characterized in that: The upper end outer wall of piston top cover (1) is fixed with positioning block (402).

3. The expedited positioning piston of claim 1, wherein: The air-tight device (5) includes: extrusion rod (501), the extrusion rod (501) slides in the notch of piston cylinder (2), the endpoint of extrusion rod (501) is fixed with annular air plug (502).

4. A rapid positioning piston according to claim 3, characterized in that: The piston cylinder (2) is opened with annular air tank (503), the annular air plug (502) slides in annular air tank (503).

5. A rapid positioning piston according to claim 3, characterized in that: The extrusion rod (501) is slid with sliding spring (504), one end of sliding spring (504) is fixed below annular air plug (502), the other end of sliding spring (504) is fixed in annular air tank (503) bottom.

6. A rapid positioning piston according to claim 5, characterized in that: The upper wall of annular air tank (503) is fixedly connected with air pipe (505), the endpoint of air pipe (505) is fixed with annular air bag (506), the air pipe (505) is fixed in the notch on piston cylinder (2), the annular air bag (506) is fixed above the inner wall of notch on piston cylinder (2).

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