CN215567589U

CN215567589U - Nitrogen spring capable of preventing piston rod from being broken and rushed out after free release

Info

Publication number: CN215567589U
Application number: CN202122271445.1U
Authority: CN
Inventors: 王邵军; 李军柏
Original assignee: Shaoyang Tongda Auto Parts Manufacturing Co ltd
Current assignee: Shaoyang Tongda Auto Parts Manufacturing Co ltd
Priority date: 2021-09-18
Filing date: 2021-09-18
Publication date: 2022-01-18
Anticipated expiration: 2031-09-18

Abstract

The utility model discloses a nitrogen spring for preventing a piston rod from being broken and rushed out after free release, which comprises a cylinder body and a piston rod main body movably arranged in the cylinder body, wherein a protection mechanism is arranged on the cylinder body; the protection mechanism comprises connecting discs, fixed strips, supporting rods, return springs and connecting strips, the connecting discs are sleeved on the circumferential side faces of the piston rod main body, the fixed strips are sleeved on the circumferential side faces of the cylinder body, and the four fixed strips are arranged along the side lines of the cylinder body in an equidistant circumferential array; the sealing mechanism comprises a sealing rod, a guide rod and a sealing rubber block, an inflation pipe groove is formed in the fixed disc, and the sealing rod is connected to the inflation pipe groove in a threaded mode. According to the utility model, the support rod can synchronously stretch and lift in the fixed strip plate by utilizing the deformation of the return spring to flexibly fix the piston rod main body, so that the piston rod main body is prevented from being broken and rushed out of the cylinder body to damage the outside.

Description

Nitrogen spring capable of preventing piston rod from being broken and rushed out after free release

Technical Field

The utility model relates to the technical field of nitrogen springs, in particular to a nitrogen spring capable of preventing a piston rod from being broken and rushed out after free release.

Background

The nitrogen spring or nitrogen cylinder is a new elastic component using high-pressure nitrogen as working medium, and it is small in volume, large in elastic force, long in stroke, stable in operation, accurate in manufacture, long in service life (one million times), and smooth in elastic force curve, and can conveniently implement pressure constancy and time-delay action, so that it is a new generation of ideal elastic component with flexible property.

The nitrogen spring is a novel elastic component using high-pressure nitrogen as a working medium, has inherent height and standard use stroke in the use process, and mainly seals the high-pressure nitrogen in a determined container, and compresses the nitrogen through a pole by external force, and when the external force is removed, the nitrogen expands by the high-pressure nitrogen to obtain certain elastic pressure.

In the prior art, when an external connecting part of a nitrogen spring is stressed too much to exceed the service stroke of the nitrogen spring in the using process, the nitrogen spring is filled with high-pressure nitrogen, so that the phenomenon of damage caused by breakage and rushing out of a piston rod is easily caused, the protection is inconvenient, the sealing effect of an inflation inlet on the nitrogen spring is general, and the working state of the nitrogen spring is influenced by the easily leaked nitrogen.

SUMMERY OF THE UTILITY MODEL

The utility model mainly aims to provide a nitrogen spring for preventing a piston rod from being broken and rushed out after free release, which can effectively solve the problems that in the prior art, when an external connecting part of the nitrogen spring is stressed too much to exceed the using stroke of the nitrogen spring, the high-pressure nitrogen is filled in the nitrogen spring, so that the piston rod is broken and rushed out easily to cause damage, the protection is inconvenient, the sealing effect of an inflation inlet on the nitrogen spring is general, and the working state of the nitrogen spring is influenced by the leakage of the nitrogen.

In order to solve the technical problems, the utility model is realized by the following technical scheme: a nitrogen spring for preventing a piston rod from being broken and rushed out after free release comprises a cylinder body and a piston rod main body movably arranged in the cylinder body, wherein a protection mechanism is arranged on the cylinder body, a fixed disc is fixedly arranged at the bottom end of the cylinder body, a sealing mechanism is arranged on the fixed disc, and the piston rod main body can stretch out and draw back on the cylinder body;

the protection mechanism comprises connecting discs, fixed slats, supporting rods, reset springs and connecting slats, wherein the connecting discs are sleeved on the circumferential sides of the piston rod main body, the connecting discs are close to the top end of the piston rod main body, the fixed slats are sleeved on the circumferential sides of the cylinder body, the four fixed slats are arranged and are distributed in an equidistant circumferential array along the side line of the cylinder body, each fixed slat is movably internally provided with one supporting rod, the bottom surface of the inner part of each fixed slat is fixedly connected with the bottom end of one supporting rod through one reset spring, the top end of each supporting rod is provided with one connecting slat, the connecting slats are inclined towards the connecting discs, the bottom ends of the connecting discs are fixedly connected with the top ends of the connecting slats, and the supporting rods can slide on the fixed slats to be matched with the piston rod main body to be adjusted in a telescopic mode in a lifting mode;

the sealing mechanism comprises a sealing rod, a guide rod and a sealing rubber block, an inflation pipe groove is formed in the fixed disc, the inflation pipe groove is in threaded connection with the sealing rod, one end, close to the center of the fixed disc, of the sealing rod is connected with the guide rod, three sealing clamping grooves are arranged on the inner wall of the inflation pipe groove in an equidistance array mode, the sealing clamping grooves are in a circular table shape, one end, with the larger diameter, of the end portion of each sealing clamping groove faces the sealing rod direction, and upper sealing rubber blocks are arranged on the guide rod in the equidistance array mode; the sealing clamping grooves are in one-to-one correspondence with the sealing rubber blocks, the shapes and the sizes of the sealing clamping grooves and the sealing rubber blocks are matched with each other, a cross knife edge is formed in one side, located outside the inflatable pipe groove, of the sealing rod, the sealing rubber blocks mainly block the sealing clamping grooves, and the cross knife edge mainly facilitates rotation of the sealing rod.

Preferably, the cylinder body top is fixed and is provided with the shield, and the piston rod main part inlays and locates inside the shield, and the shield mainly prevents inside the dust gets into the cylinder body.

Preferably, the inner wall of the cylinder body is provided with two annular grooves, the two annular grooves are close to the top end of the cylinder body, each annular groove is internally provided with a sealing ring, and the annular grooves are mainly used for mounting the sealing rings.

Preferably, two it has the direction drum to inlay on the sealing washer inner wall, the piston rod main part runs through from the direction drum is inside to be passed through, and the direction drum mainly leads spacingly to the piston rod main part.

Preferably, a supporting block is fixedly arranged on the bottom surface inside the cylinder body, an inflation hole is formed in the top end of the supporting block, the inflation hole is communicated with the inner space of the inflation pipe groove, and the supporting block mainly bears the piston rod main body.

Preferably, the top end of the piston rod main body is fixedly provided with a locking block, the bottom end of the fixed disc is provided with a locking hole, and the locking block and the locking hole are mainly and conveniently connected with an external object.

Compared with the prior art, the nitrogen spring for preventing the piston rod from being broken and rushed out after free release has the following beneficial effects:

1. according to the utility model, the fixed strip plate is arranged on the outer wall of the cylinder body, the supporting rod and the reset spring can be placed, the top end of the supporting rod can be connected with the piston rod main body through the connecting strip plate and the connecting disc, when the piston rod main body is adjusted in a telescopic mode on the cylinder body, the supporting rod can be synchronously stretched and lifted through the deformation of the reset spring to complete flexible fixation of the piston rod main body, the piston rod main body is prevented from being broken and rushed out of the cylinder body to damage the outside, and the overall protection effect on the nitrogen spring is improved.

2. According to the utility model, the sealing rod can be preliminarily inserted into the inflation pipe groove to preliminarily plug the inflation hole by rotating the sealing rod through the cross knife edge and being in threaded connection with the inflation pipe groove, the sealing clamping grooves and the sealing rubber blocks on the guide rod are sequentially clamped and connected, and the deformation characteristics of the sealing clamping grooves are utilized to further enhance the plugging effect of the inflation hole for multiple plugging of the sealing clamping grooves, and the sealing rod cannot easily separate from the inflation pipe groove due to the frustum-shaped structure of the sealing rubber blocks, so that the fixing effect is good, and the working state of the nitrogen spring is ensured.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic view of the overall structure of a nitrogen spring for preventing the piston rod from breaking and rushing out after free release according to the present invention;

FIG. 2 is a schematic diagram of a side view of a nitrogen spring for preventing piston rod rupture and ejection after free release according to the present invention;

FIG. 3 is a schematic diagram of a top view of a nitrogen spring for preventing piston rod rupture and ejection after free release according to the present invention;

FIG. 4 is a schematic cross-sectional view taken along line A-A of FIG. 3 according to the present invention;

FIG. 5 is an enlarged view of a portion of the structure shown in FIG. 4B;

FIG. 6 is an enlarged view of a portion of the structure at C in FIG. 4 according to the present invention.

In the drawings, the components represented by the respective reference numerals are listed below:

1. a cylinder body; 2. a piston rod body; 3. fixing the disc; 4. connecting the disks; 5. fixing the ribbon board; 6. a strut; 7. a return spring; 8. connecting the ribbon boards; 9. an inflation pipe groove; 10. a sealing rod; 11. a guide bar; 12. sealing the clamping groove; 13. sealing the rubber block; 14. a cross knife edge; 15. a dust cover; 16. an annular groove; 17. a seal ring; 18. a guide cylinder; 19. a support block; 20. an inflation hole; 21. a locking block; 22. a locking hole.

Detailed Description

In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the utility model easy to understand, the utility model is further described with the specific embodiments.

In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front", "rear", "both ends", "one end", "the other end", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," "connected," and the like are to be construed broadly, such as "connected," which may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Referring to fig. 1-6, the utility model is a nitrogen spring for preventing piston rod from breaking and rushing out after free release, comprising a cylinder body 1 and a piston rod main body 2 movably arranged in the cylinder body 1, wherein a protection mechanism is arranged on the cylinder body 1, a fixed disc 3 is fixedly arranged at the bottom end of the cylinder body 1, a sealing mechanism is arranged on the fixed disc 3, and the piston rod main body 2 can stretch out and draw back on the cylinder body 1;

the protection mechanism comprises a connecting disc 4, fixed slats 5, support rods 6, reset springs 7 and connecting slats 8, the connecting disc 4 is sleeved on the circumferential side of the piston rod main body 2, the connecting disc 4 is close to the top end of the piston rod main body 2, the fixed slats 5 are sleeved on the circumferential side of the cylinder body 1, the four fixed slats 5 are arranged and arranged in an equidistant circumferential array along the side line of the cylinder body 1, one support rod 6 is movably arranged inside each fixed slat 5, the bottom surface inside each fixed slat 5 is fixedly connected with the bottom end of one support rod 6 through one reset spring 7, the top end of each support rod 6 is provided with one connecting slat 8, the connecting slats 8 are obliquely arranged towards the connecting disc 4, the bottom end of the connecting disc 4 is fixedly connected with the top end of the connecting slats 8, and the support rods 6 can slide on the fixed slats 5 to lift and match with the telescopic adjustment of the piston rod main body 2;

the sealing mechanism comprises a sealing rod 10, a guide rod 11 and a sealing rubber block 13, an inflation pipe groove 9 is formed in the fixed disc 3, the inflation pipe groove 9 is connected with the sealing rod 10 in a threaded mode, one end, close to the center of the fixed disc 3, of the sealing rod 10 is connected with the guide rod 11, three sealing clamping grooves 12 are arranged on the inner wall of the inflation pipe groove 9 in an equidistant array mode, the sealing clamping grooves 12 are in a circular truncated cone shape, one end, larger in end diameter, of each sealing groove faces the direction of the sealing rod 10, and the upper sealing rubber block 13 is arranged on the guide rod 11 in an equidistant array mode; the sealing clamping grooves 12 and the sealing rubber blocks 13 are arranged in a one-to-one correspondence mode, the shapes and the sizes of the sealing clamping grooves are matched with each other, a cross knife edge 14 is formed in one side, located outside the inflation pipe groove 9, of the sealing rod 10, the sealing rubber blocks 13 mainly block the sealing clamping grooves 12, and the cross knife edge 14 mainly facilitates rotation of the sealing rod 10.

Further, the top end of the cylinder body 1 is fixedly provided with a dust cap 15, the piston rod main body 2 is embedded inside the dust cap 15, and the dust cap 15 mainly prevents dust from entering the cylinder body 1.

Furthermore, an annular groove 16 is formed in the inner wall of the cylinder body 1, two annular grooves 16 are formed in the annular groove 16 and close to the top end of the cylinder body 1, a sealing ring 17 is arranged in each annular groove 16, and the annular grooves 16 are mainly used for installing the sealing rings 17.

Furthermore, the inner walls of the two sealing rings 17 are embedded with guide cylinders 18, the piston rod main body 2 penetrates through the guide cylinders 18, and the guide cylinders 18 mainly guide and limit the piston rod main body 2.

Further, a supporting block 19 is fixedly arranged on the bottom surface inside the cylinder body 1, an inflation hole 20 is formed in the top end of the supporting block 19, the inflation hole 20 is communicated with the inner space of the inflation pipe groove 9, and the supporting block 19 mainly bears the piston rod main body 2.

Further, the top end of the piston rod main body 2 is fixedly provided with a locking block 21, the bottom end of the fixed disc 3 is provided with a locking hole 22, and the locking block 21 and the locking hole 22 are mainly convenient to connect with an external object.

The working principle of the utility model is as follows:

when personnel use, add sufficient nitrogen gas through gas tube groove 9 inside cylinder body 1, utilize the screwdriver to insert cross edge of a knife 14 and rotate sealing rod 10, sealing rod 10 is aerifyd the tube groove 9 threaded connection after with sealing rod 10 and tentatively insert gas tube groove 9 in and carry out first step shutoff to gas charging hole 20, a plurality of sealing rubber piece 13 on the guide arm 11 deform in proper order and get into corresponding sealed draw-in groove 12 and further strengthen the sealed effect to gas charging hole 20 with its joint to the multiple shutoff of sealed draw-in groove 12, when high-pressure nitrogen gas expands, when obtaining the flexible of bullet pressure control piston rod main part 2, branch 6 utilizes the deformation of reset spring 7 to stretch out and draw back in step in fixed slat 5 and go up and down the completion to the nimble fixed of piston rod main part 2, avoid piston rod main part 2 fracture to rush out cylinder body 1 and cause the destruction to the external world, improve the holistic protective effect to the nitrogen gas spring.

The foregoing shows and describes the general principles and broad features of the present invention and advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the utility model as claimed. The scope of the utility model is defined by the appended claims and equivalents thereof.

Claims

1. The nitrogen spring capable of preventing the piston rod from being broken and rushed out after free release is characterized by comprising a cylinder body (1) and a piston rod main body (2) movably arranged in the cylinder body (1), wherein a protection mechanism is arranged on the cylinder body (1), a fixed disc (3) is fixedly arranged at the bottom end of the cylinder body (1), and a sealing mechanism is arranged on the fixed disc (3);

the protection mechanism comprises a connecting disc (4), fixed slats (5), supporting rods (6), reset springs (7) and connecting slats (8), wherein the connecting disc (4) is sleeved on the circumferential side of the piston rod main body (2), the connecting disc (4) is close to the top end of the piston rod main body (2), the fixed slats (5) are sleeved on the circumferential side of the cylinder body (1), the fixed slats (5) are four and are arranged in an equidistant circumferential array along the side line of the cylinder body (1), each supporting rod (6) is movably arranged inside the fixed slats (5), each fixed slat (5) is fixedly connected between the bottom surface inside the fixed slat (5) and the bottom end of one supporting rod (6) through one reset spring (7), each connecting slat (8) is arranged at the top end of the supporting rod (6), and the connecting slats (8) are inclined towards the connecting disc (4), the bottom end of the connecting disc (4) is fixedly connected with the top end of the connecting strip plate (8);

the sealing mechanism comprises a sealing rod (10), a guide rod (11) and sealing rubber blocks (13), an inflation pipe groove (9) is formed in the fixed disc (3), the inflation pipe groove (9) is connected with the sealing rod (10) in a threaded mode, one end, close to the center of the fixed disc (3), of the sealing rod (10) is connected with the guide rod (11), three sealing clamping grooves (12) are arranged on the inner wall of the inflation pipe groove (9) in an equidistance mode, the sealing clamping grooves (12) are in a circular table shape, one ends, large in end diameter, of the sealing clamping grooves face the direction of the sealing rod (10), and the upper sealing rubber blocks (13) are arranged on the guide rod (11) in an equidistance mode; the sealing clamping grooves (12) and the sealing rubber blocks (13) are arranged in a one-to-one correspondence mode, the shapes and the sizes of the sealing clamping grooves and the sealing rubber blocks are matched with each other, and a cross knife edge (14) is formed in one side, located outside the air inflation pipe groove (9), of the sealing rod (10).

2. The nitrogen spring for preventing piston rod rupture and ejection after free release of claim 1, wherein: the cylinder body (1) top is fixed and is provided with shield (15), and piston rod main part (2) inlays and locates inside shield (15).

3. The nitrogen spring for preventing piston rod rupture and ejection after free release of claim 1, wherein: the inner wall of the cylinder body (1) is provided with two annular grooves (16), the annular grooves (16) are close to the top end of the cylinder body (1), and each annular groove (16) is internally provided with a sealing ring (17).

4. A nitrogen spring for preventing piston rod rupture and ejection after free release as claimed in claim 3 wherein: the inner walls of the two sealing rings (17) are embedded with guide cylinders (18), and the piston rod main body (2) penetrates through the guide cylinders (18).

5. The nitrogen spring for preventing piston rod rupture and ejection after free release of claim 1, wherein: the cylinder body (1) is characterized in that a supporting block (19) is fixedly arranged on the bottom surface inside the cylinder body (1), an inflation hole (20) is formed in the top end of the supporting block (19), and the inflation hole (20) is communicated with the inner space of the inflation pipe groove (9).

6. The nitrogen spring for preventing piston rod rupture and ejection after free release of claim 1, wherein: the piston rod main part (2) top is fixed and is provided with locking piece (21), locking hole (22) have been seted up to fixed disc (3) bottom.