CN201916410U

CN201916410U - Lockable-casing gas spring

Info

Publication number: CN201916410U
Application number: CN2011200032678U
Authority: CN
Inventors: 施与秋; 余卫忠; 曹文亚; 钱洁
Original assignee: CHANGZHOU GAS SPRING Co Ltd
Current assignee: CHANGZHOU GAS SPRING Co Ltd
Priority date: 2011-01-07
Filing date: 2011-01-07
Publication date: 2011-08-03
Anticipated expiration: 2021-01-07

Abstract

The utility model relates to a lockable-casing gas spring, which comprises a cylinder barrel, a piston rod and a rear plug. A guide sleeve and a guide seal ring are sleeved on the piston rod and mounted in the cylinder barrel, one end of the piston rod penetrates through the cylinder barrel, a piston is arranged at the other end of the piston rod, an inner casing is fixed in the cylinder barrel through a front inner holder and a rear inner holder respectively at two ends, the inner casing is divided into a front oil chamber and a rear oil chamber by the piston which is hermetically disposed in the inner casing, at least one damping oil passage on the piston is communicated with the front oil chamber and the rear oil chamber inside the inner casing respectively, the front inner holder is provided with at least one damping hole, a cavity between the cylinder barrel and the inner casing is divided into an oil chamber and a gas chamber by a floating isolation piston which is hermetically mounted between the cylinder barrel and the inner casing, and the front oil chamber is communicated with the oil chamber between the inner casing and the cylinder barrel through damping holes on the front inner damping holes. The lockable-casing gas spring is small in size and fine in locking rigidity, and comfortableness of the lockable-casing gas spring can be improved.

Description

Sleeve pipe lockable air spring

Technical field

The utility model relates to a kind of sleeve pipe lockable air spring, belongs to the air spring technical field.

Background technique

Air spring mainly is made up of the piston in cylinder barrel, the cylinder barrel, piston rod and valve rod etc., contain gas and fluid in the cylinder barrel.Because piston has been occupied the volume in the cylinder barrel, piston rod is pressed in the cylinder barrel during work, and piston is made axial motion extruding fluid in cylinder barrel, and the fluid pressurized gas makes piston reach the working position; After the external force disappearance that is carried on the piston rod, then gas restores and expands, and the gas of expansion promotes fluid and makes piston reset, and piston rod is shifted out, and makes air spring realize compression movement and recovery damped motion.And present disclosed locked type air spring, main structure is to utilize valve rod to move axially, open or close oil duct fast, the pistons work position is locked, but because gas has compressibility, therefore after the air spring locking, because of the unstability of gas, cause air spring locking poor rigidity, make that connected adjusting element working position is inaccurate.And the lockable formula air spring of another kind of structure is to increase a unsteady separator piston in cylinder barrel, piston is separated into former and later two oil pockets with cylinder barrel, by the separator piston that floats the cylinder barrel oil pocket is separated with air cavity again, because air cavity is arranged on a side of cylinder barrel, therefore make cylinder barrel be provided with the air cavity of a side vertically successively, the oil pocket of middle part oil pocket and opposite side, make air spring when compression, the characteristics that utilization can not be out of shape when liquid compression, make air spring have rigid locking ability preferably, reach the variation that the working position can not take place adjusting element after adjusting, improve the adjusting element degree of regulation.But the air spring of this structure is to be successively set on vertically in the cylinder barrel because of piston and unsteady separator piston, causes the axial dimension of air spring longer, and can't dwindle the volume of air spring, therefore the less occasion of more inapplicable installing spaces.Moreover, too fast because the fluid that is positioned at the piston both sides is to flow and cushion by the damping oil duct on the piston in air spring speed when resetting, travelling comfort decline.

Summary of the invention

It is little that the purpose of this utility model provides a kind of volume, locks good rigidly, and can improve the sleeve pipe lockable air spring of travelling comfort.

The utility model is that the technological scheme that achieves the above object is: a kind of sleeve pipe lockable air spring, comprise cylinder barrel, piston rod and back plug, guide sleeve and pilot seal snare are contained on the piston rod and are installed in the cylinder barrel, one end of piston rod passes cylinder barrel, the other end has piston, back plug sealing and fixing is at the rear portion of cylinder barrel, seal the inner that its internal shoulder of valve rod that is installed on the piston rod is positioned at piston, it is characterized in that: inner sleeve is fixed in the cylinder barrel by bracket in bracket in two end part preceding and the back, piston seal be arranged in the inner sleeve and inner sleeve is divided into before on oil pocket and the back oil pocket piston at least one damping oil duct communicate with preceding oil pocket and back oil pocket in the inner sleeve respectively; At least be provided with a damping hole on the bracket in before described, the separator piston sealing of floating is installed between cylinder barrel and the inner sleeve and with the cavity between cylinder barrel and the inner sleeve and is divided into oil pocket and air cavity, and preceding oil pocket communicates with oil pocket between inner sleeve and the cylinder barrel by the damping hole on the bracket in preceding.

The utility model is provided with inner sleeve in cylinder barrel, inner sleeve is fixed in the cylinder barrel by the interior bracket of preceding interior bracket and back at two end part, because piston is arranged in the inner sleeve, by piston inner sleeve is separated into preceding oil pocket and back oil pocket, and the separator piston sealing of floating is installed between cylinder barrel and the inner sleeve, and the cavity between cylinder barrel and the inner sleeve is divided into oil pocket and air cavity, with a plurality of oil pockets and air cavity along rationally being provided with between inner sleeve and the cylinder barrel, can effectively dwindle the air spring axial dimension, and reduce the volume of air spring.Fluid behind the utility model in the oil pocket enters in the preceding oil pocket by the damping oil duct on the piston, damping hole on the bracket enters oil pocket between cylinder barrel and the inner sleeve in preceding again, by fluid the separator piston sealing of floating is moved axially, reach the gas purpose in the compression air cavity, and by preceding oil pocket and oil pocket inner fluid incompressibility, lock rigidity preferably and air spring is had, make the adjusting element after the adjusting can keep accurate position.The utility model be stored in the fluid in the oil pocket between forward and backward two oil pockets in the inner sleeve and inner sleeve and the cylinder barrel by the damping oil duct on the piston and preceding in damping hole on the bracket act on unsteady separator piston, therefore air spring can reach the effect of fast moving in compression process, and in reseting procedure, fluid need enter in the back oil pocket in the inner sleeve by the two-stage damping again, reply speed so can reduce air spring, improve the travelling comfort of air spring.

Description of drawings

Below in conjunction with accompanying drawing embodiment of the present utility model is further described in detail.

Fig. 1 is a kind of structural representation of the present utility model.

Wherein: 1-valve rod, 2-piston rod, 3-guide sleeve, 4-cylinder barrel, bracket in before the oil pocket before the 5-pilot seal circle, 6-, 7-, the 7-1-damping hole, 8-oil pocket, 9-seal ring, the 10-separator piston that floats, 11-piston, 11-1-damping oil duct, the 12-inner sleeve, 13-air cavity, oil pocket behind the 14-, bracket in behind the 15-, plug behind the 16-, 17-T shape block seat.

Embodiment

See shown in Figure 1, sleeve pipe lockable air spring of the present utility model, comprise cylinder barrel 4, piston rod 2 and back plug 16, guide sleeve 3 and pilot seal circle 5 are sleeved on the piston rod 2 and are installed in the cylinder barrel 4, one end of piston rod 2 passes cylinder barrel 4, the other end has piston 11, piston 11 of the present utility model can be made integrative-structure with piston rod 2, perhaps piston 11 is installed on the piston rod 2, back plug 16 sealing and fixing are at cylinder barrel 4 rear portions, seal the inner that valve rod 1 its internal shoulder that is installed on the piston rod 2 is positioned at piston 11, make valve rod 1 and piston rod 2 keep sealing, valve rod 1 can move axially on piston rod 2, and the fluid by valve rod 1 control piston 11 both sides communicates or closes.See shown in Figure 1, the utility model inner sleeve 12 is fixed in the cylinder barrel 4 by the interior bracket 15 of preceding interior bracket 7 and back at two end part, piston 11 sealings are arranged in the inner sleeve 12, and oil pocket 6 and back oil pocket 14 before piston 11 is divided into inner sleeve 12, at least one damping oil duct 11-1 communicates with preceding oil pocket 6 and back oil pocket 14 in the inner sleeve 12 respectively on the piston 11.See shown in Figure 1, the utility model be when reducing valve rod 1 and moving its internal shoulder to the wearing and tearing of piston 11 end faces, and has a better machining property, piston 11 ends also are fixed with T shape block seat 17, these T shape block seat 17 material hardnesses are greater than the hardness of piston 11 materials, and seal ring 9 is installed in the seal groove of T shape block seat 17 and join with valve rod 1 sealing, and the internal shoulder on the valve rod 1 is corresponding with T shape block seat 17, is installed in seal ring 9 in the piston 11 external sealed grooves and seals with inner sleeve 12 and join.

See shown in Figure 1, the utility model is for ease of being installed in inner sleeve 12 in the cylinder barrel 4, bracket 7 T-shaped axle sleeves in preceding, the front end sleeve of inner sleeve 12 is contained on the axle sleeve of preceding interior bracket 7, and the T shape end face of bracket 7 in before withstanding on, bracket 7 can be connected by fastening piece with inner sleeve 12 in preceding, bracket 7 and inner sleeve 12 welding in perhaps, bracket 15 is a T oblique crank Z plug in the back of the present utility model, the axle of bracket 15 beyond the Great Wall in behind the rear end suit of inner sleeve 12, and withstand on the T shape end face of bracket 15 in the back, bracket 15 cooperated with 12 logical being full of of inner sleeve in this back, axle in the back on the bracket 15 circle beyond the Great Wall is provided with seal groove, and seal ring 9 is installed in the sealing groove, makes between the interior bracket 15 in inner sleeve 12 and back to being tightly connected.See shown in Figure 1, at least be provided with a damping hole 7-1 on the bracket 7 in before the utility model, damping hole 7-1 quantity in before it on bracket 7 and aperture can require to be provided with according to damping, separator piston 10 sealings of floating are installed between cylinder barrel 4 and the inner sleeve 12, in the unsteady separator piston 10, seal groove is set respectively on the outer ring, the seal ring 9 that is installed in the seal groove joins with cylinder barrel 4 and inner sleeve 12 sealings respectively, separator piston 10 is divided into oil pocket 8 and air cavity 13 with the cavity between cylinder barrel 4 and the inner sleeve 12 by floating, before oil pocket 6 communicate with oil pocket 8 between inner sleeve 12 and the cylinder barrel 4 by the damping hole 7-1 on the bracket 7 in preceding, form the two-stage damping by the damping hole 7-1 on damping oil duct 11-1 on the piston 11 and the preceding interior bracket 7, and have damping preferably.

See shown in Figure 1, during the utility model work, air cavity 13 between its inner sleeve 12 and the cylinder barrel 4 is filled with gas, oil pocket 8 is filled with fluid, and also be filled with fluid in the preceding oil pocket 6 of inner sleeve 12 inner carriers 11 both sides and the back oil pocket 14, operating valve lever 1 is opened, make the internal shoulder on the valve rod 1 throw off piston 11 end faces, the preceding oil pocket 6 and the back oil pocket 14 of piston 11 both sides are communicated, pressing down piston rod 2 moves axially, fluid in the back oil pocket 14 of inner sleeve 12 enters in the preceding oil pocket 6 of inner sleeve 12 by the damping oil duct 11-1 on the piston 11, fluid in the preceding oil pocket 6 enters by the damping hole 7-1 on the bracket 7 in preceding and promotes the gases that unsteady separator piston 10 compresses in the air cavitys 13 in the oil pocket 8, volume in the air cavity 13 is reduced, after piston rod 2 moves into place, by operating valve lever 1 its internal shoulder and piston 11 end faces are joined and close oil duct, because the fluid in the piston 11 both sides oil pockets is incompressible, and reach the effect of rigid locking.When air spring need reset, operating valve lever 1 is opened, and after being carried in the external force disappearance on the piston rod 2, then gas restores and expands, the gas that expands promotes unsteady separator piston 10 and moves, make the damping oil duct 11-1 on oil pocket 6 before damping hole 7-1 on interior front rack of fluid in the oil pocket 8, the inner sleeve 12 and the piston 11 and oil pocket 14 after entering resets air spring.

Claims

1. sleeve pipe lockable air spring, comprise cylinder barrel (4), piston rod (2) and back plug (16), guide sleeve (3) and pilot seal circle (5) are sleeved on piston rod (2) and go up and be installed in the cylinder barrel (4), one end of piston rod (2) passes cylinder barrel (4), the other end has piston (11), back plug (16) sealing and fixing is at the rear portion of cylinder barrel (4), seal the inner that its internal shoulder of valve rod (1) that is installed on the piston rod (2) is positioned at piston (11), it is characterized in that: inner sleeve (12) is fixed in the cylinder barrel (4) by the interior bracket (15) of preceding interior bracket (7) and back at two end part, piston (11) sealing is arranged in the inner sleeve (12) and with inner sleeve (12) and is divided into preceding oil pocket (6) and back oil pocket (14), piston (11) go up at least one damping oil duct (11-1) respectively with inner sleeve (12) in preceding oil pocket (6) and after oil pocket (14) communicate; At least be provided with a damping hole (7-1) on the bracket (7) in before described, separator piston (10) sealing of floating is installed between cylinder barrel (4) and the inner sleeve (12) and with the cavity between cylinder barrel (4) and the inner sleeve (12) and is divided into oil pocket (8) and air cavity (13), and preceding oil pocket (6) communicates with oil pocket (8) between inner sleeve (12) and the cylinder barrel (4) by the damping hole (7-1) on the preceding interior bracket (7).

2. sleeve pipe lockable air spring according to claim 1 is characterized in that: described preceding interior bracket (7) is a T oblique crank Z cover, and the front portion of inner sleeve (12) is sleeved on the axle sleeve of preceding interior bracket (7), and withstands on the T shape end face of preceding interior bracket (7).

3. sleeve pipe lockable air spring according to claim 1 is characterized in that: bracket (15) be a T oblique crank Z plug in the described back, and the axle that the rear end of inner sleeve (12) is sleeved on bracket (15) in the back and withstands on the T shape end face of the interior bracket (15) in back beyond the Great Wall.

4. sleeve pipe lockable air spring according to claim 1, it is characterized in that: on the inside and outside circle of described unsteady separator piston (10) seal groove is set respectively, the seal ring (9) that is installed in the seal groove joins with cylinder barrel (4) and inner sleeve (12) sealing respectively.

5. sleeve pipe lockable air spring according to claim 1, it is characterized in that: described piston (11) end also is fixed with T shape block seat (17), seal ring (9) is installed in the seal groove on the T shape block seat (17) and with valve rod (1) sealing and joins, internal shoulder on the valve rod (1) is corresponding with T shape block seat (17), and the seal ring (9) that is installed in piston (11) the external sealed groove joins with inner sleeve (12) sealing.