CN205047725U

CN205047725U - Double -piston air spring

Info

Publication number: CN205047725U
Application number: CN201520706291.6U
Authority: CN
Inventors: 任陆林
Original assignee: Changzhou Longxiang Gas Spring Co Ltd
Current assignee: Changzhou Longxiang Gas Spring Co., Ltd.
Priority date: 2015-09-11
Filing date: 2015-09-11
Publication date: 2016-02-24
Anticipated expiration: 2025-09-11

Abstract

The utility model discloses a double -piston air spring, including cylinder body, piston and piston rod, the inner chamber of piston and cylinder body slides and is connected, the one end and the piston fixed connection of piston rod, and the other end still includes spacer ring and seal cover outside stretching out the cylinder body, the piston has two, and all fixes the one end at the piston rod, and the spacer ring suit is on the piston rod to be located between two pistons, the seal cover suit is on the piston rod to lie in the intracavity. The utility model discloses the rate of stretch of piston is stable, and very slow velocity of movement can be adjusted to the velocity of movement of piston.

Description

Double-piston air spring

Technical field

The utility model relates to a kind of double-piston air spring.

Background technique

Air spring purposes widely, the working principle of air spring is filled with inert gas or gas mixture in airtight pressure cylinder, make the pressure in cavity higher than atmospheric manyfold, utilize the cross-section area of piston rod be less than piston cross-section area thus produce pressure difference to realize the motion of piston rod.Traditional air spring all only has a piston, and a piston has its own shortcomings: the rate of stretch of piston is unstable, and the movement velocity of piston cannot be moved with very slow speed.

Summary of the invention

The purpose of this utility model is to provide a kind of rate of stretch of piston to stablize, and the movement velocity of piston can be adjusted to the double-piston air spring of very slow movement velocity.

In order to achieve the above object, the technical solution of the utility model is: a kind of double-piston air spring, comprises cylinder body, piston and piston rod, piston is connected with the inner chamber slippage of cylinder body, one end of piston rod is fixedly connected with piston, and the other end stretches out outside cylinder body, also comprises spacer ring and stuffing box gland, described piston has two, and being all fixed on one end of piston rod, spacer ring is set with on the piston rod, and between two pistons, described stuffing box gland suit on the piston rod, and is positioned at inner chamber.

Also comprise two piston packings, two piston packings lay respectively at two between piston and cylinder body.

After adopting said structure, the utility model is owing to having two pistons, and be all fixed on one end of piston rod, and by spacer ring, two pistons are separated, two pistons are more stable than the motion rate of stretch of a piston when moving, and the movement velocity of two pistons can be slower than the movement velocity of a piston.Simultaneously in order to ensure the sealability of piston, adopt stuffing box gland suit on the piston rod.

Accompanying drawing explanation

Fig. 1 is structure sectional view of the present utility model.

Embodiment

The embodiment provided below in conjunction with accompanying drawing is described in further detail the utility model.

Shown in Figure 1, a kind of double-piston air spring, comprises cylinder body 1, piston 2 and piston rod 3, piston 2 is connected with the inner chamber 1-1 slippage of cylinder body 1, one end of piston rod 3 is fixedly connected with piston 2, and the other end stretches out outside cylinder body 1, also comprises spacer ring 4 and stuffing box gland 5, described piston 2 has two, and being all fixed on one end of piston rod 3, spacer ring 4 is sleeved on piston rod 3, and between two pistons 2, described stuffing box gland 5 is sleeved on piston rod 3, and is positioned at inner chamber 1-1.

Shown in Figure 1, in order to improve the sealing effect of two pistons 2 further, also comprising two piston packings, 6, two piston packings 6 and laying respectively between two pistons 2 and cylinder body 1.

Shown in Figure 1, the utility model is owing to having two pistons 2, and be all fixed on one end of piston rod 3, and by spacer ring 4, two pistons 2 are separated, two pistons 2 are more stable than the motion rate of stretch of a piston 2 when moving, and the movement velocity of two pistons 2 can be slower than the movement velocity of a piston 2.Simultaneously in order to ensure the sealability of piston 2, stuffing box gland 5 is adopted to be set with on the piston rod.

Above-described is only preferred implementation of the present utility model; it should be pointed out that for the person of ordinary skill of the art, under the prerequisite not departing from the utility model creation design; can also make some distortion and improvement, these all belong to protection domain of the present utility model.

Claims

1. a double-piston air spring, comprise cylinder body (1), piston (2) and piston rod (3), piston (2) is connected with inner chamber (1-1) slippage of cylinder body (1), one end of piston rod (3) is fixedly connected with piston (2), the other end stretches out cylinder body (1) outward, it is characterized in that: also comprise spacer ring (4) and stuffing box gland (5), described piston (2) has two, and be all fixed on one end of piston rod (3), spacer ring (4) is sleeved on piston rod (3), and be positioned between two pistons (2), described stuffing box gland (5) is sleeved on piston rod (3), and be positioned at inner chamber (1-1).

2. double-piston air spring according to claim 1, is characterized in that: also comprise two piston packings (6), and two piston packings (6) lay respectively between two pistons (2) and cylinder body (1).