CN210371791U

CN210371791U - Safe and silent air spring

Info

Publication number: CN210371791U
Application number: CN201920907756.2U
Authority: CN
Inventors: 蒋幕戎
Original assignee: Xuzhou Tianhong Transmission Equipment Co ltd
Current assignee: Xuzhou Tianhong Transmission Equipment Co ltd
Priority date: 2019-06-17
Filing date: 2019-06-17
Publication date: 2020-04-21
Anticipated expiration: 2029-06-17

Abstract

The utility model discloses a safe and silent air spring, which comprises an outer cylinder barrel, an inner cylinder barrel, a piston rod and a connector, wherein the bottom of the inner cylinder barrel is provided with an air cavity filled with high-pressure nitrogen, the inner cylinder barrel is internally provided with a stopper, two ends of the stopper are respectively connected with the piston rod and the inner wall of the inner cylinder barrel, the stopper, the piston rod and the piston form a silencing cavity, a plurality of reset springs are arranged in the silencing cavity, the outer cylinder barrel is filled with lubricating oil, and a plurality of discharge holes are arranged at the positions of the outer cylinder barrel, which correspond to the silencing; the top of the inner cylinder barrel is provided with a sealing sleeve, the joint of the sealing sleeve and the piston rod is provided with an annular groove, and the upper end and the lower end of the annular groove are both provided with elastic scraping blades; the utility model discloses an air spring, it is safe in utilization, the gas tightness is good, has avoided the emergence of situations such as air spring explosion gas leakage, still has good amortization and heat conduction effect simultaneously, realizes the low noise operation.

Description

Safe and silent air spring

Technical Field

The utility model relates to an air spring specifically is a safe silent air spring.

Background

The gas spring is an industrial accessory which can play a role in supporting, buffering, braking, height adjustment, angle adjustment and the like. Due to the fundamental difference in principle, the gas spring has very remarkable advantages compared with the common spring: the speed is relatively slow, the dynamic force change is not large (generally within 1: 1.2), and the control is easy.

The existing gas spring has the following defects: when the stress disappears or the stress is overloaded, the condition of unbalanced stress appears, and at the moment, if the gas spring fails, the piston and the piston rod can directly rush out and damage objects, so that surrounding personnel are injured seriously; the existing gas spring is generally sealed at an opening of a pressure pipe by a sealing ring, and dry friction is easy to occur between the sealing ring and a piston rod along with long-time use, so that the friction between the piston rod and the sealing ring is large and noise is easy to generate when the piston rod is stretched; in addition, the air spring does not have a limiting mechanism, and the common air spring in the existing market can leak air and be locked under the condition of repeated stretching, so that the problem of hurting people is easy to occur.

Disclosure of Invention

An object of the utility model is to provide a safe silent air spring to solve the problem that proposes among the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme: a safe and silent air spring comprises an outer cylinder barrel, an inner cylinder barrel, a piston rod and a connector, wherein the bottom of the piston rod is connected with the piston, the piston is positioned in the inner cylinder barrel, an air cavity is arranged at the bottom of the inner cylinder barrel, high-pressure nitrogen is filled in the air cavity, an annular limiting block is arranged in the inner cylinder barrel, two ends of the limiting block are respectively connected with the piston rod and the inner wall of the inner cylinder barrel, the limiting block, the piston rod and the piston form a silencing cavity, a plurality of reset springs are arranged in the silencing cavity, two ends of the reset springs are respectively connected with the piston and the limiting block, the outer cylinder barrel is sleeved outside the inner cylinder barrel, lubricating oil is filled in the outer cylinder barrel; the improved piston cylinder is characterized in that a sealing sleeve is arranged at the top of the inner cylinder barrel, an annular groove is formed in the joint of the sealing sleeve and the piston rod, elastic scraping blades are arranged at the upper end and the lower end of the annular groove, liquid inlet channels are arranged on two sides of the sealing sleeve, a liquid inlet hole is formed in the corresponding position of the inner cylinder barrel and the liquid inlet channels, and one end of the liquid inlet hole extends into the outer.

As a further aspect of the present invention: the bottom of the inner cylinder barrel is provided with an air release hole which is of an inverted cone structure, a sealing plug is arranged in the air release hole, and a sealing ring is arranged at the joint of the sealing plug and the air release hole.

As a further aspect of the present invention: the surface of the sealing plug is provided with a spiral air release groove, and the bottom of the sealing plug is provided with a circular pull ring.

As a further aspect of the present invention: the connector is connected with the top of the piston rod, and the top of the connector is hinged with a universal head.

As a further aspect of the present invention: the top of the sealing sleeve is provided with a limiting sleeve, the side face of the limiting sleeve is provided with a plurality of limiting holes, and locking screws are arranged in the limiting holes.

Compared with the prior art, the beneficial effects of the utility model are that: the utility model discloses an air spring, it is safe in utilization, the gas tightness is good, has avoided the emergence of situations such as air spring explosion gas leakage, still has good amortization and heat conduction effect simultaneously, realizes the low noise operation.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a schematic diagram of the internal structure of the present invention.

Fig. 3 is a schematic structural diagram of the middle sealing plug of the present invention.

In the figure: 1-outer cylinder barrel, 2-piston rod, 3-sealing sleeve, 4-pull ring, 5-limiting sleeve, 6-connecting head, 7-universal head, 8-inner cylinder barrel, 9-piston, 10-silencing cavity, 11-limiting block, 12-annular groove, 13-scraping piece, 14-limiting hole, 15-locking screw, 16-liquid inlet channel, 17-reset spring, 18-sealing plug, 19-air leakage hole and 20-air leakage groove. 21-air cavity.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Please refer to fig. 1-2, in an embodiment of the present invention, a safe and silent air spring includes an outer cylinder 1, an inner cylinder 8, a piston 9, a piston rod 2 and a connector 6, the bottom of the piston rod 2 is connected with the piston 9, the piston 9 is located in the inner cylinder 8, the bottom of the inner cylinder 8 is provided with an air cavity 21, the air cavity 21 is filled with high-pressure nitrogen, the inner cylinder 8 is provided with an annular stopper 11, two ends of the stopper 11 are respectively connected with the inner walls of the piston rod 2 and the inner cylinder 8, the stopper 11, the piston rod 2 and the piston 9 form a silencing cavity 10, the silencing cavity 10 is provided with a plurality of return springs 17, two ends of the return springs 17 are respectively connected with the piston 9 and the stopper 11, the outer cylinder 1 is sleeved outside the inner cylinder 8, the outer cylinder 1 is filled with lubricating oil, and the outer cylinder 1 is provided with a plurality of; the top of the inner cylinder barrel 8 is provided with a sealing sleeve 3, the joint of the sealing sleeve 3 and the piston rod 2 is provided with an annular groove 12, the upper end and the lower end of the annular groove 12 are both provided with elastic scraping blades 13, two sides of the sealing sleeve 3 are provided with liquid inlet channels 16, the corresponding positions of the inner cylinder barrel 8 and the liquid inlet channels 16 are provided with liquid inlet holes, and one end of each liquid inlet hole extends into the outer cylinder barrel 1.

In the operation process of the air spring of the utility model, the connector 6 is mainly connected with an object, the pressure of the object acts on the piston rod 2 and the piston 9, the gas in the air cavity 21 of the piston 9 generates pressure, and because the stress cross-sectional areas at the two ends of the piston 9 are different, pressure difference is generated at the two ends of the piston 9, thereby generating elasticity to realize the dry motion of the piston 9; when the object pressure is removed, the piston rod 2 returns to the initial state again, and the gas spring can be reused.

If the air spring is acted by a heavy-load object exceeding the bearing capacity of the air spring in the using process, the piston 9 has unbalanced stress, the piston rod 2 can generate great elastic force to pop out, and in order to avoid the influence of the air spring on the safety of an operator, the utility model discloses be equipped with the silencing cavity 10 in the inner cylinder barrel 8, when the piston 9 drives the piston rod 2 to move upwards, the piston 9 will press the reset spring 17 in the silencing cavity 10 and receive the reaction force of the reset spring 17, buffer off a part of the elastic force of the piston 9, and enable the piston rod 2 to move more slowly and stably; in addition, the return spring 17 in the silencing cavity 10 can also silence the noise generated in the operation process of the piston rod 2; when the piston 9 moves, the generated vibration is transmitted into the lubricating oil in the silencing cavity 10, the lubricating oil absorbs a part of noise due to the self property, and meanwhile, resistance can be generated on the operation of the piston rod 2, so that the operation of the piston rod 2 is more stable; lubricating oil in the silencing cavity 10 flows into the sealing sleeve 3 from the discharge hole, the outer cylinder barrel 1 and the liquid inlet channel 16 after being compressed, so that the piston rod 2 is lubricated.

Because the air spring is generally used at-40 to 80, when ambient temperature is too high or cross low, also can influence the air spring performance, so the utility model discloses including 8 overcoat of cylinder have outer cylinder 1, play heat retaining effect through 1 interior lubricating oil of outer cylinder to inner cylinder 8, avoid interior temperature of inner cylinder 8 to take place to change by a wide margin, simultaneously, lubricating oil still can flow into respectively in noise elimination chamber 10 and the seal cover 3 through discharge orifice and feed liquor hole in the outer cylinder 1 in, carry out the amortization and lubricate.

Because the piston rod 2 will move up and down many times in the movement process of the air spring, the piston rod 2 will contact with the sealing sleeve 3 to produce friction at this moment, the friction will lead to noise and generate heat, so the utility model discloses be equipped with annular groove 12 in the sealing sleeve 3 and the contact of piston rod 2, can introduce the lubricating oil in the outer cylinder 1 through the feed liquor channel 16 in the annular groove 12, lubricate through the lubricating oil between piston rod 2 and the sealing sleeve 3 at this moment, reduce the friction, reduced and caused; meanwhile, the scraping blades 13 above and below the annular groove 12 can not only seal the annular groove 12, but also scrape oil on the passing piston rod 2, so that oil stains on the surface of the piston rod 2 are prevented from affecting the work of the gas spring.

The bottom of the inner cylinder barrel 8 is provided with an air release hole 19, the air release hole 19 is of an inverted cone structure, a sealing plug 18 is arranged in the air release hole 19, and a sealing ring is arranged at the joint of the sealing plug 18 and the air release hole 19; under the normal condition, most of the gas springs are disassembled, holes are drilled in the gas springs to discharge gas in the gas springs, and a large amount of gas and lubricating oil are splashed out of the drilled holes, so that operators are easily injured; in order to avoid damage, the air cylinder is provided with the air release hole 19 at the bottom, and the air can be discharged from the air cavity 21 by rotating the sealing plug 18 in the air release hole 19, so that the influence of punching on the surface of the air spring on the use of the air spring is avoided; meanwhile, because the air release hole 19 is of an inverted cone structure, the pressure in the air cavity 21 is maximum at the opening of the air release hole 19, and the air tightness of the whole air cavity 21 can be ensured only by plugging the air release hole 19 by the sealing plug 18; the sealing ring is used for enhancing air tightness.

The connector 6 is connected with the top of the piston rod 2, and the top of the connector 6 is hinged with a universal head 7; the connector 6 mainly says that the piston rod 2 is connected with other parts, and the universal head 7 at the top of the connector 6 can enable the part to be connected and the piston rod 2 to incline at different angles, so that the installation of other parts is facilitated.

The top of the sealing sleeve 3 is provided with a limiting sleeve 5, the side surface of the limiting sleeve 5 is provided with a plurality of limiting holes 14, and locking screws 15 are arranged in the limiting holes 14; if the gas spring is exploded in the operation process, the piston rod 2 is ejected, so that the piston rod 2 is externally provided with the limiting sleeve 5, and after the piston rod 2 is operated, the piston rod 2 can pass through the limiting hole 14 through the locking screw 15, so that the piston rod 2 is fixed, and the piston rod 2 is prevented from being ejected accidentally.

Referring to fig. 3, in the embodiment of the present invention, a spiral air release groove 20 is formed on the surface of the sealing plug 18, and a circular pull ring 4 is formed at the bottom of the sealing plug 18; when the sealing plug 18 is pulled out, if the sealing plug is directly pulled out, gas is sprayed out to cause overlarge air pressure; in the utility model, the air release groove 20 is arranged on the surface of the sealing plug 18, so that the sealing plug 18 can be slowly screwed out along the air release groove 20 when being pulled out, the air can slowly flow out through the air release groove 20, when the sealing plug 18 is completely pulled out, the pressure at the air release hole 19 is reduced to atmospheric pressure, and the human body can not be injured; the pull ring 4 is provided to facilitate extraction of the sealing plug 18.

It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims

1. The utility model provides an air spring of safe silence, includes outer cylinder (1), inner cylinder (8), piston (9), piston rod (2) and connector (6), its characterized in that: the bottom of the piston rod (2) is connected with a piston (9), the piston (9) is located in an inner cylinder barrel (8), an air cavity (21) is arranged at the bottom of the inner cylinder barrel (8), high-pressure nitrogen is filled in the air cavity (21), an annular limiting block (11) is arranged in the inner cylinder barrel (8), two ends of the limiting block (11) are respectively connected with the piston rod (2) and the inner wall of the inner cylinder barrel (8), the limiting block (11), the piston rod (2) and the piston (9) form a silencing cavity (10), a plurality of reset springs (17) are arranged in the silencing cavity (10), two ends of each reset spring (17) are respectively connected with the piston (9) and the limiting block (11), the outer cylinder barrel (1) is sleeved outside the inner cylinder barrel (8), lubricating oil is filled in the outer cylinder barrel (1), and a plurality of flow holes are formed in the outer cylinder barrel (1) and the; interior cylinder (8) top is equipped with seal cover (3), and seal cover (3) and piston rod (2) junction are equipped with annular groove (12), and both ends all are equipped with elastic doctor-bar (13) about annular groove (12), and seal cover (3) both sides are equipped with inlet channel (16), interior cylinder (8) and inlet channel (16) department of correspondence are equipped with the feed liquor hole, and feed liquor hole one end extends to in outer cylinder (1).

2. A safe and silent gas spring as claimed in claim 1, wherein: interior cylinder (8) bottom is equipped with disappointing hole (19), disappointing hole (19) are the back taper structure, are equipped with sealing plug (18) in disappointing hole (19), and sealing plug (18) and disappointing hole (19) junction are equipped with the sealing washer.

3. A safe and silent gas spring as claimed in claim 2, wherein: the surface of the sealing plug (18) is provided with a spiral air release groove (20), and the bottom of the sealing plug (18) is provided with a circular pull ring (4).

4. A safe and silent gas spring as claimed in claim 1, wherein: the connecting head (6) is connected with the top of the piston rod (2), and the top of the connecting head (6) is hinged with a universal head (7).

5. A safe and silent gas spring as claimed in claim 1, wherein: the sealing sleeve is characterized in that a limiting sleeve (5) is arranged at the top of the sealing sleeve (3), a plurality of limiting holes (14) are formed in the side face of the limiting sleeve (5), and locking screws (15) are arranged in the limiting holes (14).