Nitrogen spring dust cover moving along with piston

Abstract

The utility model discloses a nitrogen spring dust-proof sleeve moving along with a piston. The nitrogen spring dust-proof sleeve comprises a dust-proof cover and a dust-proof lengthened sleeve, a mounting groove is formed in the lower end of the inner surface of the dust cover, and an oil suppression assembly is arranged in the dust cover; the dustproof lengthening sleeve comprises a lengthening barrel, a second sealing groove and a lengthening barrel sealing ring, the lengthening barrel is located in the mounting groove, the second sealing groove is formed in the upper end of the inner arc face of the lengthening barrel, the lengthening barrel sealing ring is embedded in the second sealing groove, the dustproof lengthening sleeve further comprises a fixing ring, a through hole is formed in the middle of the fixing ring, and the fixing ring is located in the through hole. The fixing ring and the lengthened barrel 21 are installed in a matched mode, first sealing grooves are formed in the upper end and the lower end of the inner arc face of the dust cover correspondingly, and sealing rings are embedded in the first sealing grooves correspondingly. According to the nitrogen spring dust cover moving along with the piston, liquid and scrap iron can be prevented from being attached to the piston rod in the actual use process, and the overall service life of a nitrogen spring is greatly prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of nitrogen springs, in particular to a nitrogen spring dust cover which moves with a piston. Background Art

[0002] A nitrogen spring is an elastic element that uses high-pressure nitrogen as its working medium. It is widely used in many fields, including molds, automobiles, and electronics. Its working principle is based on the compressibility of gas. High-pressure nitrogen is filled into a sealed cylinder. When an external force acts on the piston, the nitrogen is compressed, storing energy. When the external force disappears, the nitrogen expands, releasing the stored energy and pushing the piston back to its original position, thereby achieving elastic cushioning and support functions. However, existing nitrogen springs often expose the internal piston rod directly to the outside. During actual use, liquid and iron filings adhere to the piston rod, greatly reducing the overall service life of the nitrogen spring. To this end, we have proposed a nitrogen spring dust cover that moves with the piston. Utility Model Content

[0003] The technical problem to be solved by the present invention is to overcome the existing defects and provide a nitrogen spring dust cover that moves with the piston, which can prevent liquid and iron filings from adhering to the piston rod during actual use, greatly increasing the overall service life of the nitrogen spring, and effectively solving the problems in the background technology.

[0004] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a nitrogen spring dust cover that moves with the piston, comprising a dust cover and a dust extension sleeve;

[0005] Dust cover: A mounting groove is provided at the lower end of the inner surface thereof, and an oil suppression component is provided inside the dust cover;

[0006] Dustproof extension sleeve: It includes an extension barrel, a second sealing groove and an extension barrel sealing ring. The extension barrel is located inside the mounting groove. A second sealing groove is provided on the upper end of the inner arc surface of the extension barrel. The interior of the second sealing groove is inlaid with an extension barrel sealing ring, which can prevent liquid and iron filings from adhering to the piston rod during actual use, greatly increasing the overall service life of the nitrogen spring.

[0007] Furthermore, the dustproof extension sleeve also includes a fixing ring, a through hole is opened in the middle of the fixing ring, and the fixing ring is installed in conjunction with the extension barrel 21 to facilitate the connection between the extension barrel and the piston rod.

[0008] Furthermore, a sealing groove is provided at both upper and lower ends of the inner arc surface of the dust cover, and a sealing ring is embedded in the sealing groove to prevent liquid from entering the piston rod surface through the gap between the piston rod and the dust cover.

[0009] Furthermore, the outer arc surface of the extended barrel is slidably connected to the sealing ring to prevent liquid from entering the surface of the piston rod through the gap between the piston rod and the dust cover.

[0010] Furthermore, evenly distributed mounting holes are provided at the lower end of the outer arc surface of the dust cover, and the mounting holes are all connected to the mounting grooves, so as to facilitate the installation of the dust cover.

[0011] Furthermore, the oil suppression component is an oil control block, and the lower end of the outer arc surface of the dust cover is provided with evenly distributed replacement holes. The edges of the replacement holes are hinged with replacement doors through hinges. The middle of the replacement door has a threaded hole, and the inside of the threaded hole is threadedly connected with a stud. The end of the stud close to the center of the dust cover is provided with an oil control block to facilitate replacement of the oil control block.

[0012] Furthermore, the oil control blocks are all sponge oil control blocks, which are convenient for absorbing excess liquid on the surface of the piston rod.

[0013] Compared with the prior art, the beneficial effects of the present invention are: the nitrogen spring dust cover that moves with the piston has the following advantages:

[0014] With the cooperation of the dust cover and the dustproof extension sleeve, the extension barrel moves synchronously with the expansion and contraction of the piston rod of the nitrogen spring, which can prevent liquid and iron filings from adhering to the piston rod during actual use. At the same time, with the cooperation of the oil control block, the liquid on the surface of the piston rod of the nitrogen spring is adsorbed, which greatly increases the overall service life of the nitrogen spring. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0016] Figure 2 This is a schematic diagram of the structure of the explosion of the dust cover and the dust extension sleeve of the utility model;

[0017] Figure 3 This is a schematic diagram of the structure of the partial explosion of the dustproof extension sleeve of the utility model;

[0018] Figure 4 This is a schematic diagram of the structure of a partial dust cover of the utility model;

[0019] Figure 5 It is a structural schematic diagram of the right side cross-section of the outer arc surface of the dust cover of the utility model.

[0020] In the figure: 1 dust cover, 2 dust extension sleeve, 21 extended barrel, 22 sealing groove 2, 23 extended barrel sealing ring, 24 fixing ring, 3 sealing ring, 4 mounting groove, 5 sealing groove 1, 6 mounting hole, 7 replacement hole, 8 replacement door, 9 stud, 10 oil control block. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0022] See also Figure 1-5 , this embodiment provides a technical solution: a nitrogen spring dust cover that moves with the piston, including a dust cover 1 and a dust extension sleeve 2;

[0023] Dust cover 1: The lower end of its inner surface is provided with a mounting groove 4, the interior of the dust cover 1 is provided with an oil suppression component, the oil suppression component is an oil control block 10, the lower end of the outer arc surface of the dust cover 1 is provided with evenly distributed replacement holes 7, the edges of the replacement holes 7 are hinged with replacement doors 8 by hinges, the replacement doors 8 and the replacement holes 7 are fitted with sealing strips and door locks, the middle of the replacement doors 8 are provided with threaded holes, the inside of the threaded holes are threadedly connected with studs 9, the end of the stud 9 close to the center of the dust cover 1 is provided with an oil control block 10, the oil control blocks 10 are all sponge oil control blocks, the upper and lower ends of the inner arc surface of the dust cover 1 are provided with sealing grooves 5, the inside of the sealing grooves 5 are inlaid with sealing rings 3, the outer arc surface of the extended barrel 21 is slidably connected to the sealing ring 3, the lower end of the outer arc surface of the dust cover 1 Evenly distributed mounting holes 6 are opened, and the mounting holes 6 are all connected to the mounting grooves 4. The worker inserts the dust cover 1 into the upper end of the nitrogen spring cylinder through the cooperation of the mounting grooves 4, and wraps a part of the piston rod of the nitrogen spring. At this time, the sealing ring 3 on the lower side is tightly combined with the outer arc surface of the upper end of the nitrogen spring cylinder to isolate the external dust and iron filings. At this time, the oil control block 10 is in contact with the surface of the piston rod. Then the worker inserts the pin shaft into the mounting hole 6 and presses the front end of the nitrogen spring cylinder tightly. After a while, the worker opens the door lock and opens the replacement door 8. Then he unscrews the stud 9, replaces the oil control block 10, and screws the stud 9 of the new oil control block 10 into the threaded hole again. Then he closes the replacement door 8 and closes the door lock to facilitate the adsorption of liquid on the surface of the piston rod, thereby increasing the overall service life of the nitrogen spring.

[0024] The dustproof extension sleeve 2: It includes an extension barrel 21, a sealing groove 22 and an extension barrel sealing ring 23. The extension barrel 21 is located inside the mounting groove 4. A sealing groove 22 is provided on the upper end of the inner arc surface of the extension barrel 21. The interior of the sealing groove 22 is inlaid with an extension barrel sealing ring 23. The dustproof extension sleeve 2 also includes a fixing ring 24. A through hole is provided in the middle of the fixing ring 24. The fixing ring 24 is installed in conjunction with the extension barrel 21. The upper and lower ends of the extension barrel 21 are through holes, and the two through holes are connected. The diameter of the fixing ring 24 is larger than the diameter of the through hole on the upper side. Slide the extension barrel 21 into the interior of the dust cover 1. At this time, the outer arc surface of the dust cover 1 is tightly fitted with the sealing ring 3 on the upper side. Then install the fixing ring 24 with the mounting groove of the head of the nitrogen spring piston rod, and then fix the extension barrel by welding or other fixed connection methods. The upper side of 21 is tightly connected to the lower side of the fixing ring 24. Then, during the operation of the nitrogen spring, as the piston rod continues to expand and contract, the oil control block 10 continuously absorbs excess liquid on the surface of the piston rod (during the operation of the nitrogen spring, the high-pressure nitrogen inside it will produce temperature changes due to compression and expansion. When the ambient temperature is low and the temperature of the piston rod is relatively high during operation, the water vapor in the air will condense into small water droplets on the surface of the piston rod when it cools, forming liquid). At the same time, the fixing ring 24 drives the extended barrel 21 to move synchronously with the expansion and contraction of the piston rod. The long barrel sealing ring 23 cooperates to prevent external iron filings from contacting or adhering to the surface of the piston rod. At this time, the extended barrel 21 slides inside the dust cover 1, and the upper sealing ring 3 isolates external dust and iron filings, thereby increasing the overall service life of the nitrogen spring.

[0025] The working principle of the nitrogen spring dust cover that moves with the piston provided by the present invention is as follows: first, the worker inserts the dust cover 1 into the upper end of the nitrogen spring cylinder body through the cooperation of the installation groove 4, and wraps a part of the piston rod of the nitrogen spring. At this time, the sealing ring 3 on the lower side is tightly combined with the outer arc surface of the upper end of the nitrogen spring cylinder body to isolate external dust and iron filings. At this time, the oil control block 10 is in contact with the surface of the piston rod. Then the worker inserts the pin shaft into the installation hole 6 and presses the front end of the nitrogen spring cylinder body tightly. Then, the extended barrel 21 is slid into the interior of the dust cover 1. At this time, the outer arc surface of the dust cover 1 is tightly fitted with the sealing ring 3 on the upper side. Then, the fixing ring 24 is installed with the installation groove of the head of the nitrogen spring piston rod, and then the upper side surface of the long barrel 21 is tightly connected with the lower side surface of the fixing ring 24 by welding or other fixed connection methods. Then, during the operation of the nitrogen spring, as the piston rod The continuous expansion and contraction of the oil control block 10 continuously absorbs excess liquid on the surface of the piston rod (during the operation of the nitrogen spring, the high-pressure nitrogen inside it will produce temperature changes due to compression and expansion. When the ambient temperature is low and the temperature of the piston rod is relatively high during operation, the water vapor in the air will condense into small water droplets on the surface of the piston rod when it is cooled, forming liquid). At the same time, the extended barrel 21 is driven by the fixed ring 24 to move synchronously with the expansion and contraction of the piston rod. The long barrel sealing ring 23 cooperates to prevent external iron filings from contacting or adhering to the surface of the piston rod. At this time, the extended barrel 21 slides inside the dust cover 1, and the upper sealing ring 3 isolates external dust and iron filings. After a period of time, the worker opens the door lock, opens the replacement door 8, then unscrews the stud 9, replaces the oil control block 10, and screws the stud 9 of the new oil control block 10 into the threaded hole again, and then closes the replacement door 8 to close the door lock.

[0026] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the description and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A nitrogen spring dust boot that moves with the piston, characterized by: It includes a dust cover (1) and a dust extension sleeve (2); Dust cover (1): a mounting groove (4) is provided at the lower end of the inner surface thereof, and an oil suppression component is provided inside the dust cover (1); The dustproof extension sleeve (2) comprises an extension barrel (21), a second sealing groove (22) and an extension barrel sealing ring (23), wherein the extension barrel (21) is located inside the mounting groove (4), a second sealing groove (22) is provided on the upper end of the inner arc surface of the extension barrel (21), and an extension barrel sealing ring (23) is embedded inside the second sealing groove (22).

2. The nitrogen spring dust boot that moves with the piston according to claim 1, characterized in that: The dustproof extension sleeve (2) further comprises a fixing ring (24), a through hole being provided in the middle of the fixing ring (24), and the fixing ring (24) is mounted in cooperation with the extension barrel (21).

3. The nitrogen spring dust boot that moves with the piston according to claim 1, characterized in that: The inner arc surface of the dust cover (1) is provided with sealing grooves (5) at both upper and lower ends, and sealing rings (3) are embedded in the interior of the sealing grooves (5).

4. The nitrogen spring dust boot that moves with the piston according to claim 3, characterized in that: The outer arc surface of the elongated barrel (21) is slidably connected to the sealing ring (3).

5. The nitrogen spring dust boot that moves with the piston according to claim 1, characterized in that: The lower end of the outer arc surface of the dust cover (1) is provided with evenly distributed mounting holes (6), and the mounting holes (6) are all connected to the mounting grooves (4).

6. The nitrogen spring dust boot that moves with the piston according to claim 1, characterized in that: The oil suppression component is an oil control block (10), and the lower end of the outer arc surface of the dust cover (1) is provided with evenly distributed replacement holes (7), and the edges of the replacement holes (7) are hinged with replacement doors (8) through hinges. The middle of the replacement door (8) begins to have a threaded hole, and the inside of the threaded hole is threadedly connected with a stud (9), and the end of the stud (9) close to the center of the dust cover (1) is provided with an oil control block (10).

7. The nitrogen spring dust boot that moves with the piston according to claim 6, characterized in that: The oil control blocks (10) are all sponge oil control blocks.

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