CN210397549U

CN210397549U - Jacket type super-strong nitrogen spring

Info

Publication number: CN210397549U
Application number: CN201920969835.6U
Authority: CN
Inventors: 李中强; 王玉有; 司志备
Original assignee: Dongguan Boding Precision Machinery Manufacturing Co ltd
Current assignee: Dongguan Boding Precision Machinery Manufacturing Co ltd
Priority date: 2019-06-25
Filing date: 2019-06-25
Publication date: 2020-04-24
Anticipated expiration: 2029-06-25

Abstract

The utility model discloses a jacket type superstrong nitrogen spring, it is including the cylinder body, fixed mounting is in the interior cylinder of cylinder body and install in interior cylinder and can be relative this interior cylinder gliding piston rod from top to bottom, first cavity has in this interior cylinder, it is annular second cavity to form between this interior cylinder outer wall and the cylinder body inner wall, be formed with the interval between this interior cylinder lower extreme and the cylinder body bottom, make this first cavity and second cavity intercommunication, this piston rod lower extreme has the third cavity, this third cavity communicates this first cavity. The utility model integrates the advantages of plunger type nitrogen spring and piston type nitrogen spring in the market, avoids the deficiency skillfully, the elasticity can be improved by 1 time at most under the condition of the plunger rod with the same size, when the elasticity is required by a customer for a certain time, the overall height size of the product can be reduced, and the cost is saved; under the condition of the same installation height, the stroke can be lengthened by 30-50%, and when the stroke required by a customer is constant, the product height is reduced, and the die space is saved.

Description

Jacket type super-strong nitrogen spring

The technical field is as follows:

the utility model relates to the technical field of elastic element products, in particular to a jacket type super strong nitrogen spring.

Background art:

with the continuous progress of science and technology, the demand of the industrial field for elastic elements is higher and higher, and the elastic elements are required to meet various requirements of mechanical structures and also to be miniaturized and have high performance.

The conventional elastic elements used in the prior art, such as springs, elastic rubber, air cushions and the like, generate elastic force which is increased in proportion to the increase of the compression amount and cannot keep constant pressure in the working process, the telescopic stroke is small, a lot of processes need constant elastic change, the conventional elastic elements bring great influence and limitation to the process design requirements, the process requirements cannot be met, the product quality and the efficiency are directly influenced, and the production cost is greatly improved.

The nitrogen spring in the prior art can solve the problems, at present, the nitrogen spring used in various industries in China is mainly imported, a die nitrogen spring (a stamping nitrogen spring or a nitrogen cylinder for short) is a novel elastic element using high-pressure nitrogen as a working medium, and the nitrogen spring has the advantages of small volume, large elasticity, long stroke, stable work, precise manufacture, long service life, mild elastic curve, no need of pre-tightening and the like, has the work which is difficult to complete by conventional elastic components such as a metal spring, rubber, an air cushion and the like, simplifies the design and manufacture of a die, is convenient to install and adjust the die, prolongs the service life of the die, ensures the stability of product quality, and is a new generation of optimal elastic component with flexibility.

The nitrogen springs on the market mainly have the following two structures:

the first is a plunger type nitrogen spring, and as shown in fig. 1 and 2, the elasticity F of the plunger type nitrogen spring is equal to the internal gas pressure of the plunger rod area x; although the plunger type nitrogen spring has a compact structure, the plunger rod 101 can run to the bottom of the cylinder 102, and can make long stroke within the same installation height, but the elasticity is small.

The second is a piston type nitrogen spring, as shown in fig. 3 and 4, the elastic force F of the piston type nitrogen spring is equal to the internal gas pressure of the piston area x, and the piston type nitrogen spring has a larger force bearing area compared with the piston type nitrogen spring, so that the elastic force can be improved, but because the gas is compressed in the bottom space of the cylinder 104 when the piston rod 103 moves downwards, the piston rod 103 cannot move to the bottom of the cylinder 104 due to the gas safety pressure, and a gas storage space is reserved, the height of the piston type nitrogen spring is large, and the effective stroke is short.

In summary, the present inventors propose the following technical solutions.

The utility model has the following contents:

an object of the utility model is to overcome prior art not enough, provide a jacket type superstrong nitrogen spring.

In order to solve the technical problem, the utility model discloses a following technical scheme: the jacket type super-strong nitrogen spring comprises a cylinder body, an inner cylinder and a piston rod, wherein the inner cylinder is fixedly installed in the cylinder body, the piston rod is installed in the inner cylinder and can slide up and down relative to the inner cylinder, a first cavity is formed in the inner cylinder, an annular second cavity is formed between the outer wall of the inner cylinder and the inner wall of the cylinder body, an interval is formed between the lower end of the inner cylinder and the bottom of the cylinder body, the first cavity is communicated with the second cavity, a third cavity is formed at the lower end of the piston rod, and the third cavity is communicated with the first cavity.

Furthermore, in the above technical solution, a through hole is provided at the upper end of the inner cylinder, after the piston rod slides downwards, a fourth chamber is formed between the upper portion of the piston rod and the upper portion of the inner cylinder, and the through hole communicates the fourth chamber with the outside.

Furthermore, in the above technical scheme, the periphery of the upper end of the inner cylinder barrel is fixedly mounted with the upper end of the cylinder body through the snap spring, and a sealing ring is further arranged between the periphery of the upper end of the inner cylinder barrel and the cylinder body.

Further, in the above technical scheme, an outer dust ring is further arranged between the periphery of the upper end of the inner cylinder barrel and the cylinder body, and the outer dust ring is located above the snap spring.

Furthermore, in the above technical scheme, the inner wall of the upper end of the inner cylinder is formed with a convex ring which protrudes inwards to prevent the piston rod from sliding upwards to separate from the inner cylinder, and the through hole is arranged on the convex ring.

Furthermore, in the above technical scheme, the inner wall of the bulge loop is provided with a first groove body and a second groove body located above the first groove body, a first guide ring is arranged in the first groove body, an inner dust ring is arranged in the second groove body, and the first guide ring and the inner dust ring are both sleeved on the periphery of the piston rod.

Furthermore, in the above technical scheme, the piston rod is provided at its periphery with a third groove body and a fourth groove body located below the third groove body, the third groove body is provided with a second guide ring, the fourth groove body is provided with a piston seal ring, and the peripheries of the second guide ring and the piston seal ring are both in contact with the inner wall of the inner cylinder.

After the technical scheme is adopted, compared with the prior art, the utility model has following beneficial effect: the utility model discloses plunger type nitrogen spring and piston nitrogen spring's on the comprehensive market advantage has ingeniously avoided not enoughly to add the inner cylinder in the cylinder body, make and form between inner cylinder outer wall and the cylinder body inner wall and be annular second cavity, so that under the condition of the plunger rod of same size, the utility model discloses an elasticity can improve 1 times at the biggest, and is a timing at customer demand elasticity, can reduce the whole height and size of product, saves the cost, and in addition, under the condition of same mounting height, the stroke can extend 30 ~ 50%, and is a timing at customer demand stroke, or reduces the product height, saves the mould space, the order the utility model has the advantages of extremely strong market competition.

Description of the drawings:

FIG. 1 is a structural view of a commercial plunger type nitrogen spring in a conventional state;

FIG. 2 is a structural diagram of a commercial plunger type nitrogen spring in a stressed state;

FIG. 3 is a structural view of a commercial plunger type nitrogen spring in a normal state;

FIG. 4 is a structural diagram of a commercial plunger type nitrogen spring in a stressed state;

FIG. 5 is a structural diagram of the present invention in a conventional state;

fig. 6 is a structural diagram of the present invention in a stressed state.

The specific implementation mode is as follows:

the present invention will be further described with reference to the following specific embodiments and accompanying drawings.

As shown in fig. 5-6, the jacket type super strong nitrogen spring comprises a cylinder body 1, an inner cylinder 2 fixedly installed in the cylinder body 1, and a piston rod 3 installed in the inner cylinder 2 and capable of sliding up and down relative to the inner cylinder 2, wherein a first chamber 20 is provided in the inner cylinder 2, an annular second chamber 10 is formed between the outer wall of the inner cylinder 2 and the inner wall of the cylinder body 1, a gap is formed between the lower end of the inner cylinder 2 and the bottom of the cylinder body 1 to communicate the first chamber 20 with the second chamber 10, a third chamber 30 is provided at the lower end of the piston rod 3, and the third chamber 30 is communicated with the first chamber 20. The utility model discloses the during operation, piston rod 3 receives exogenic action when down, piston rod 3 moves down along 2 inner walls of inner cylinder, the volume of first cavity 20 diminishes gradually, when piston rod 3 reachs the lower dead (shown in figure 6), it is gaseous by the compression in third cavity 30 and second cavity 10, the pressure rise value is in each parts safe bearing within range, and because the gas portion of compression enters into the annular second cavity 10 that is that forms between 2 outer walls of inner cylinder and the 1 inner wall of cylinder body, the volume that is about to the gas compression needs is placed in second cavity 10, so that can reduce the utility model discloses overall structure's mounting height. When the external force is removed, the piston rod 3 rebounds to the top dead center (shown in fig. 5) under the action of the gas pressure in the cylinder. That is to say, the utility model discloses plunger type nitrogen spring and piston nitrogen spring's on the comprehensive market advantage, it is not enough to ingenious avoided to add interior cylinder 2 in cylinder body 1, make and form between 2 outer walls of interior cylinder and the 1 inner wall of cylinder body and be annular second cavity 10, so that under the condition of the plunger rod of same size, the utility model discloses an elasticity can improve 1 times at the biggest, and is at customer demand elasticity timing, can reduce the whole height dimension of product, saves the cost, and in addition, at the condition of same mounting height, the stroke can extend 30 ~ 50%, and is at customer demand stroke timing, or reduces the product height, saves the mould space, makes the utility model has the advantages of extremely strong market competition. The utility model discloses the piston stroke is unrestricted, is controlled in the safe pressure within range by compressed gas pressure homoenergetic. Particularly, the utility model discloses initial volume has a proportion with the volume after the compression, and in the proportion within range, all is safe, the utility model discloses the volume that is annular second chamber 10 and conventional piston nitrogen spring bottom is the same when the piston is down to the lower dead center that adds, just can ensure that pressure is safe.

The upper end of the inner cylinder 2 is provided with a through hole 21, after the piston rod 3 slides downwards, a fourth chamber 31 is formed between the upper part of the piston rod 3 and the upper part of the inner cylinder 2, and the through hole 21 is communicated with the fourth chamber 31 and the outside. The utility model discloses 2 upper ends of interior cylinder are provided with through-hole 21 and can prevent this piston rod 3 lapse back, and the fourth cavity 31 that forms between 3 upper portions of this piston rod and the 2 upper portions of interior cylinder forms vacuum state, guarantees that piston rod 3 is down or go upward not influenced.

The periphery of the upper end of the inner cylinder barrel 2 is fixedly installed with the upper end of the cylinder body 1 through a clamp spring 22, and a sealing ring 23 is further arranged between the periphery of the upper end of the inner cylinder barrel 2 and the cylinder body 1, so that the periphery of the upper end of the inner cylinder barrel 2 is in sealing contact with the cylinder body 1. Furthermore, an outer dust ring 24 is arranged between the periphery of the upper end of the inner cylinder barrel 2 and the cylinder body 1, the outer dust ring 24 is positioned above the clamp spring 22, and the outer dust ring 24 can effectively prevent dust from entering.

The inner wall of the upper end of the inner cylinder barrel 2 is provided with a convex ring 25 which protrudes inwards to prevent the piston rod 3 from sliding upwards to separate from the inner cylinder barrel 2, and the through hole 21 is arranged on the convex ring 25.

The inner wall of the convex ring 25 is provided with a first groove body and a second groove body located above the first groove body, a first guide ring 26 is arranged in the first groove body, an inner dust ring 27 is arranged in the second groove body, the first guide ring 26 and the inner dust ring 27 are both sleeved on the periphery of the piston rod 3, and the inner dust ring 27 enables the piston rod 3 to be in sealing contact with the convex ring 25.

The periphery of the piston rod 3 is provided with a third groove body and a fourth groove body located below the third groove body, the third groove body is provided with a second guide ring 32, the fourth groove body is provided with a piston sealing ring 33, the peripheries of the second guide ring 32 and the piston sealing ring 33 are both in contact with the inner wall of the inner cylinder barrel 2, and the piston rod 3 is ensured to be capable of stably moving upwards or downwards in the inner cylinder barrel 2.

To sum up, the utility model discloses plunger type nitrogen spring and piston nitrogen spring's on the comprehensive market advantage has ingeniously avoided not enoughly to add interior cylinder 2 in cylinder body 1, make and form between 2 outer walls of interior cylinder and the 1 inner wall of cylinder body and be annular second cavity 10, so that under the condition of the plunger rod of same size, the utility model discloses an elasticity can improve 1 times at the biggest, and is at customer demand elasticity timing, can reduce the whole altitude size of product, saves the cost, and in addition, at the condition of same mounting height, the stroke can extend 30 ~ 50%, and is at customer demand stroke timing, or reduces the product height, saves the mould space, makes the utility model has the advantages of extremely strong market competition.

Of course, the above description is only an exemplary embodiment of the present invention, and not intended to limit the scope of the present invention, and all equivalent changes and modifications made by the constructions, features, and principles of the present invention in accordance with the claims of the present invention are intended to be included in the scope of the present invention.

Claims

1. The utility model provides a superstrong nitrogen spring of cover type which characterized in that: the cylinder comprises a cylinder body (1), an inner cylinder barrel (2) fixedly installed in the cylinder body (1) and a piston rod (3) which is installed in the inner cylinder barrel (2) and can slide up and down relative to the inner cylinder barrel (2), wherein a first cavity (20) is formed in the inner cylinder barrel (2), a second annular cavity (10) is formed between the outer wall of the inner cylinder barrel (2) and the inner wall of the cylinder body (1), a gap is formed between the lower end of the inner cylinder barrel (2) and the bottom of the cylinder body (1), the first cavity (20) is communicated with the second cavity (10), a third cavity (30) is formed at the lower end of the piston rod (3), and the third cavity (30) is communicated with the first cavity (20).

2. The jacket type super strong nitrogen spring according to claim 1, characterized in that: the upper end of the inner cylinder barrel (2) is provided with a through hole (21), after the piston rod (3) slides downwards, a fourth chamber (31) is formed between the upper part of the piston rod (3) and the upper part of the inner cylinder barrel (2), and the through hole (21) is communicated with the fourth chamber (31) and the outside.

3. The jacket type super strong nitrogen spring according to claim 1, characterized in that: the periphery of the upper end of the inner cylinder barrel (2) is fixedly installed with the upper end of the cylinder body (1) through a clamp spring (22), and a sealing ring (23) is further arranged between the periphery of the upper end of the inner cylinder barrel (2) and the cylinder body (1).

4. The jacket type super strong nitrogen spring according to claim 3, characterized in that: an outer dust ring (24) is further arranged between the periphery of the upper end of the inner cylinder barrel (2) and the cylinder body (1), and the outer dust ring (24) is located above the clamp spring (22).

5. The jacket type super strong nitrogen spring according to claim 2, characterized in that: the inner wall of the upper end of the inner cylinder barrel (2) is provided with a convex ring (25) which protrudes inwards to prevent the piston rod (3) from sliding upwards to separate from the inner cylinder barrel (2), and the through hole (21) is arranged on the convex ring (25).

6. The jacket type super strong nitrogen spring according to claim 5, characterized in that: the inner wall of the convex ring (25) is provided with a first groove body and a second groove body located above the first groove body, a first guide ring (26) is arranged in the first groove body, an inner dust ring (27) is arranged in the second groove body, and the first guide ring (26) and the inner dust ring (27) are both sleeved on the periphery of the piston rod (3).

7. The jacket type super strong nitrogen spring according to claim 6, characterized in that: the periphery of the piston rod (3) is provided with a third groove body and a fourth groove body located below the third groove body, the third groove body is provided with a second guide ring (32), the fourth groove body is provided with a piston sealing ring (33), and the peripheries of the second guide ring (32) and the piston sealing ring (33) are both in contact with the inner wall of the inner cylinder barrel (2).