CN211202717U

CN211202717U - Nitrogen spring plunger rod protection structure

Info

Publication number: CN211202717U
Application number: CN201922120531.5U
Authority: CN
Inventors: 沈树海; 林晓霞; 陈守红
Original assignee: Dongguan Boding Precision Machinery Manufacturing Co ltd
Current assignee: Dongguan Boding Precision Machinery Manufacturing Co ltd
Priority date: 2019-11-28
Filing date: 2019-11-28
Publication date: 2020-08-07
Anticipated expiration: 2029-11-28

Abstract

The utility model discloses a nitrogen gas spring plunger rod protective structure, it includes: the upper pressing plate is fixed at the upper end of the plunger rod, the organ shield is fixed on the outer edge of the lower end face of the upper pressing plate, the lower end of the organ shield is fixed at the upper end of the cylinder barrel, a protection space is formed between the organ shield and the cylinder barrel, and the plunger rod is arranged in the protection space. The utility model discloses set up the top board on the plunger rod, and fixed mounting organ guard shield between top board and the cylinder upper end, make and form the guard space between this organ guard shield and the cylinder, this plunger rod is arranged in this guard space, with this plunger rod and external operational environment completely isolated, even completely isolate external operational environment abominable, also can protect the plunger rod effectively, also can improve the life and operational reliability of nitrogen spring at the same time; the utility model discloses the structure is very simple, and is with low costs, and the equipment is convenient, and the organ guard shield can be along with plunger rod reciprocating motion, and flexible freedom can satisfy customer operation requirement completely, has extremely strong market competition.

Description

Nitrogen spring plunger rod protection structure

The technical field is as follows:

the utility model relates to a nitrogen spring product technical field refers in particular to a nitrogen spring plunger rod protective structure.

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, the nitrogen spring (called die nitrogen spring or nitrogen cylinder for short) is a novel elastic element using high-pressure nitrogen as a working medium, and has the advantages of small volume, large elasticity, long stroke, stable work, precise manufacture, long service life, gentle elastic curve, no need of pre-tightening and the like, the nitrogen spring has the work which is difficult to complete by conventional elastic components such as metal springs, rubbers, air cushions and the like, the design and manufacture of a die are simplified, the installation and adjustment of the die are convenient, the service life of the die is prolonged, the stability of the product quality is ensured, and the nitrogen spring is a new generation of optimal elastic component with flexible performance.

The plunger rod of the nitrogen spring reciprocates when working, high-pressure nitrogen in the nitrogen spring is sealed by the contact of the plunger rod and a sealing element, the surface of the plunger rod is required to be very smooth in order to ensure the working life of the nitrogen spring, theoretically, the surface smoothness of the plunger rod is required to be less than or equal to 0.04um, but the plunger rod in the nitrogen spring can rise and extend out of the cylinder when working, the working environment of the nitrogen spring is sometimes severe, dust, sundries, oil, cooling water and the like contact the plunger rod to cause the surface of the plunger rod to be rusted and the like, and the oil, the water and the like can be brought into the cylinder during the reciprocating motion of the plunger rod, so that the gas volume of the nitrogen spring is reduced, the gas pressure in the cylinder is increased, the nitrogen spring works under high pressure, the service life is influenced, and explosion.

In view of the above, the present inventors propose the following.

The utility model has the following contents:

an object of the utility model is to overcome prior art not enough, provide a nitrogen spring plunger rod protective structure.

In order to solve the technical problem, the utility model discloses a following technical scheme: this nitrogen spring plunger rod protective structure includes: the lower end of the organ shield is fixed at the upper end of the cylinder barrel, so that a protection space is formed between the organ shield and the cylinder barrel, and the plunger rod is arranged in the protection space.

Further, in the above technical solution, a first flange is disposed at an upper end of the organ shield, and the upper pressure plate and the first flange are locked by a first flat head bolt.

Furthermore, in the above technical scheme, the lower end of the organ shield is sleeved on the periphery of the upper end of the cylinder barrel and is clamped and fixed by the clamp.

Further, in the above technical solution, a second flange is disposed at a lower end of the organ shield, the second flange is fixed to a POM gasket, and the POM gasket is fixed to an upper end of the cylinder barrel.

Furthermore, in the above technical scheme, the upper end of the cylinder barrel is provided with a guide sleeve, and an annular clamping groove is formed on the periphery of the guide sleeve and the inner wall of the cylinder barrel; and a snap ring which protrudes downwards is formed at the lower end of the POM gasket and is clamped and fixed in the annular clamping groove, so that the POM gasket is fixed at the upper end of the cylinder barrel.

Further, in the above technical solution, a clamping groove is further provided at the periphery of the guide sleeve; the snap ring inboard is provided with the buckle, and this buckle and draw-in groove block location.

Furthermore, in the above technical scheme, the plunger rod is inserted into the guide sleeve, and a guide ring, an oil seal and a dust seal are arranged between the periphery of the plunger rod and the inner wall of the guide sleeve.

Further, in the above technical solution, the center of the upper pressure plate and the center of the upper end surface of the plunger rod are locked together by a second flat bolt.

Further, in the above technical solution, the second flange and the POM washer are fastened together by a third stud bolt.

After the technical scheme is adopted, compared with the prior art, the utility model has following beneficial effect: the utility model arranges the upper pressure plate on the upper end of the plunger rod, and fixedly installs the organ shield between the upper pressure plate and the upper end of the cylinder barrel, so that a protective space is formed between the organ shield and the cylinder barrel, the plunger rod is arranged in the protective space, the plunger rod is completely isolated from the external working environment, even if the external working environment is completely isolated, the plunger rod can be effectively protected, and simultaneously, the phenomenon that the volume of nitrogen spring gas is reduced because oil, water and the like are brought into the cylinder barrel in the reciprocating motion of the plunger rod can be effectively prevented, thereby leading the pressure in the cylinder barrel to be increased, leading the nitrogen spring to work under high pressure, influencing the service life, and possibly causing overpressure explosion accidents in serious conditions can be avoided, in addition, the utility model has the advantages of extremely simple structure, low cost, convenient assembly, and the organ shield can move along with the reciprocating motion of the plunger rod, can stretch freely, the utility model has strong market competitiveness.

Description of the drawings:

fig. 1 is a schematic structural diagram of a first embodiment of the present invention;

fig. 2 is a schematic view of a first embodiment of the present invention in a use state;

fig. 3 is a schematic view of a second embodiment of the present invention in a use state;

fig. 4 is a schematic structural diagram of a second embodiment of the present invention.

The specific implementation mode is as follows:

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

The first embodiment is as follows:

as shown in fig. 1-2, a protection structure for a nitrogen spring plunger rod is provided, which comprises: an upper pressure plate 4 fixed on the upper end of the plunger rod 2 and an organ shield 5 fixed on the outer edge of the lower end surface of the upper pressure plate 4, wherein the lower end of the organ shield 5 is fixed on the upper end of the cylinder 1, so that a protection space is formed between the organ shield 5 and the cylinder 1, and the plunger rod 2 is arranged in the protection space. The utility model arranges the upper pressure plate 4 on the upper end of the plunger rod 2, and fixedly arranges the organ shield 5 between the upper pressure plate 4 and the upper end of the cylinder barrel 1, so that a protective space is formed between the organ shield 5 and the cylinder barrel 1, the plunger rod 2 is arranged in the protective space, the plunger rod is completely isolated from the external working environment, even if the external working environment is completely isolated, the plunger rod can be effectively protected, and simultaneously, the phenomenon that the volume of nitrogen spring gas is reduced because oil, water and the like are brought into the cylinder barrel in the reciprocating motion of the plunger rod, so that the pressure in the cylinder barrel is increased, the nitrogen spring works, the service life is influenced, and the phenomenon that overpressure causes explosion accidents possibly occurs in serious cases can be caused, in addition, the utility model has extremely simple structure, low cost, convenient assembly, and the shield can freely stretch and retract along with the reciprocating motion of the plunger rod, can satisfy customer operation requirement completely, the order the utility model discloses extremely strong market competition has.

The upper end of the organ shield 5 is provided with a first flange 51, and the upper pressure plate 4 and the first flange 51 are locked by a first flat head bolt 41, so that the upper end of the organ shield 5 and the upper pressure plate 4 are stably connected together. Wherein the organ shield 5 and the first flange 51 are bonded, vulcanized and fixed together.

The lower end of the organ shield 5 is sleeved on the periphery of the upper end of the cylinder barrel 1 and clamped and fixed through the clamping hoop 52, so that the lower end of the organ shield 5 is fixed on the upper end of the cylinder barrel 1.

The center of the upper pressure plate 4 and the center of the upper end face of the plunger rod 2 are locked together through a second flat head bolt 42.

To sum up, the utility model has the advantages that the upper end of the plunger rod 2 is provided with the upper pressure plate 4, the organ shield 5 is fixedly arranged between the upper end of the upper pressure plate 4 and the upper end of the cylinder barrel 1, a protective space is formed between the organ shield 5 and the cylinder barrel 1, the plunger rod 2 is arranged in the protective space, the plunger rod is completely isolated from the external working environment, even if the external working environment is completely isolated, the plunger rod can be effectively protected, and simultaneously, the phenomenon that oil, water and the like are brought into the cylinder barrel in the reciprocating motion of the plunger rod to cause the gas volume of the nitrogen spring to be reduced, so that the gas pressure in the cylinder barrel is increased, the nitrogen spring works under high pressure, the service life is influenced, and the phenomenon that overpressure happens to explosion accidents can be caused in serious cases can be caused, in addition, the utility model has the advantages of extremely simple structure, low cost and convenient, flexible freedom can satisfy customer operation requirement completely, makes the utility model discloses extremely strong market competition has.

Example two:

with reference to fig. 3-4, the second embodiment is different from the first embodiment in that: the lower end of the organ shield 5 is different from the assembly structure of the upper end of the cylinder barrel 1. Specifically, a second flange 53 is provided at the lower end of the organ shield 5, the second flange 53 is fixed to a POM washer 54, and the POM washer 54 is fixed to the upper end of the cylinder tube 1.

More specifically, the upper end of the cylinder barrel 1 is provided with a guide sleeve 3, and the periphery of the guide sleeve 3 and the inner wall of the cylinder barrel 1 form an annular clamping groove 11; a snap ring 541 which protrudes downwards is formed at the lower end of the POM washer 54, and the snap ring 541 is fastened and fixed in the annular groove 11, so that the POM washer 54 is fixed at the upper end of the cylinder 1. Wherein, the periphery of the guide sleeve 3 is also provided with a clamping groove; the inner side of the snap ring 541 is provided with a buckle, and the buckle and the snap groove are clamped and positioned to ensure that the POM washer 54 is stably assembled at the upper end of the cylinder barrel 1. The organ shield 5 and the second flange 53 are bonded, vulcanized and fixed together, and the structure is more stable.

The plunger rod 2 is arranged in the guide sleeve 3 in a penetrating way, and a guide ring 31, an oil seal 32 and a dust seal 33 are arranged between the periphery of the plunger rod 2 and the inner wall of the guide sleeve 3. The second flange 53 and the POM washer 54 are locked together by a third stud 55.

Except for the above, other structures of the second embodiment are the same as those of the first embodiment, and the second embodiment can also achieve the technical effects achieved by the first embodiment, and are not described in detail herein.

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 nitrogen gas spring plunger rod protective structure which characterized in that: it includes: the upper pressing plate (4) is fixed at the upper end of the plunger rod (2), the organ shield (5) is fixed at the outer edge of the lower end face of the upper pressing plate (4), the lower end of the organ shield (5) is fixed at the upper end of the cylinder (1), a protection space is formed between the organ shield (5) and the cylinder (1), and the plunger rod (2) is arranged in the protection space.

2. A nitrogen spring plunger rod protective structure as claimed in claim 1, wherein: the upper end of the organ shield (5) is provided with a first flange (51), and the upper pressure plate (4) and the first flange (51) are locked through a first flat head bolt (41).

3. A nitrogen spring plunger rod protective structure as claimed in claim 2, wherein: the lower end of the organ shield (5) is sleeved on the periphery of the upper end of the cylinder barrel (1) and clamped and fixed through a clamping hoop (52).

4. A nitrogen spring plunger rod protective structure as claimed in claim 2, wherein: the lower end of the organ shield (5) is provided with a second flange (53), the second flange (53) is fixed on a POM gasket (54), and the POM gasket (54) is fixed at the upper end of the cylinder barrel (1).

5. A nitrogen spring plunger rod protection structure as claimed in claim 4, wherein: the upper end of the cylinder barrel (1) is provided with a guide sleeve (3), and an annular clamping groove (11) is formed in the periphery of the guide sleeve (3) and the inner wall of the cylinder barrel (1); and a snap ring (541) which protrudes downwards is formed at the lower end of the POM gasket (54), and the snap ring (541) is clamped and fixed in the annular clamping groove (11) so that the POM gasket (54) is fixed at the upper end of the cylinder barrel (1).

6. A nitrogen spring plunger rod protection structure as claimed in claim 5, wherein: a clamping groove is also formed in the periphery of the guide sleeve (3); the inner side of the clamping ring (541) is provided with a buckle which is clamped and positioned with the clamping groove.

7. A nitrogen spring plunger rod protection structure as claimed in claim 5, wherein: the plunger rod (2) penetrates through the guide sleeve (3), and a guide ring (31), an oil seal (32) and a dustproof seal (33) are arranged between the periphery of the plunger rod (2) and the inner wall of the guide sleeve (3).

8. A nitrogen spring plunger rod protecting structure according to any one of claims 1-7, wherein: the center of the upper pressure plate (4) and the center of the upper end face of the plunger rod (2) are locked together through a second flat head bolt (42).

9. A nitrogen spring plunger rod protection structure as claimed in claim 4, wherein: the second flange (53) and the POM washer (54) are locked together through a third flat head bolt (55).