CN201090649Y

CN201090649Y - Shock eliminator

Info

Publication number: CN201090649Y
Application number: CNU2007201765650U
Authority: CN
Inventors: 林明正
Original assignee: Yihong Tech Co Ltd
Current assignee: Yihong Tech Co Ltd
Priority date: 2007-09-29
Filing date: 2007-09-29
Publication date: 2008-07-23
Anticipated expiration: 2017-09-29

Abstract

Disclosed is a shock absorber which comprises a cylinder pipe unit, an oil-gas separation valve which is arranged in the cylinder pipe unit and structures a gas chamber and an oil chamber, a piston unit of a piston arranged in the oil chamber, and a damping unit arranged in the oil chamber. The damping unit comprises an elastic throttle plate which is arranged at the periphery of the piston unit and provided with flexibility. The piston and the elastic throttle plate divide the oil chamber into three oil storage areas. When the piston unit moves towards the cylinder pipe to compress the cylinder pipe, the throttle plate deforms under press to enable the oil move rapidly; when the piston unit resets, the throttle plate restores and then the oil flows back gradually. Through the arrangement of the damping unit, the shock absorber can compress rapidly and stretch gradually and has better performance in using comfortableness.

Description

Shock absorber

Technical field

The utility model is a kind of shock absorber, particularly relates to a kind of front fork stem that is fixed in bicycle, and its inside is that to utilize a fluid space and a gas space to arrange in pairs or groups mutually mobile, so as to the shock absorber of shock-proof effect is provided.

Background technique

As shown in Figure 1, a kind of shock absorber in the past 1 comprises: an earthen pipe unit 11, an Oil-gas Separation valve 12, and a piston unit 13.Earthen pipe unit 11 comprises the outer tube 111 of a hollow upright, coupling seat 112 that a sealing is cemented in the bottom of outer tube 111, the secure bond oil sealing base 113 on the top of outer tube 111, and a Bearing 114 that is fixedly mounted in oil sealing base 113 belows.Oil-gas Separation valve 12 be can move axially the ground airtight stopper be contained in the outer tube 111, and with outer tube 111 separate define one below the gas space 115, and fluid space 116 up.

Piston unit 13 comprises that one can be installed in the piston 131 in the fluid space 116 with moving axially, and one connects piston 131 and the piston rod 132 of stretch through out Bearing 114 and oil sealing base 113.Piston 131 is separated out first reserve 117 of a contiguous Oil-gas Separation valve 12 and second reserve 118 of a contiguous Bearing 114 with fluid space 116.Certainly piston unit 13 comprises that also some are installed in piston 131 and the piston rod 132, be used to adjust the control unit of pressure, yet because it is not a creation emphasis of the present utility model, so no longer add explanation, also not quite clear detail structure of describing open piston 131 and piston rod 132 in detail at this.

When shock absorber 1 is subjected to external force, piston unit 13 can be as shown in Figure 2, move down with respect to earthen pipe unit 11, fluid in the reserve 117 of winning is squeezed, and it is mobile down with the gas in the pressurized gas space 115 to promote Oil-gas Separation valve 12, and when external force disappears, the reposition force that can accumulate by gases in the gas space 115 just, pushing tow Oil-gas Separation valve 12 resets, can see through the fluid in first reserve 117 simultaneously, drive piston unit 13 (see figure 1) that moves up, in order to the buffering vibrations that external force caused.

Though, above-mentioned shock absorber 1 can move by the piston unit 13 and the collocation of Oil-gas Separation valve 12, change the gas space 115 and come damping vibration with the size in fluid space 116, but because shock absorber 1 is not provided with any damping structure, so piston unit 13 to lower compression with reset up, it all is identical travelling speed, so when shock absorber 1 bears bigger vibrations, will react apace and reset, and then the discomfort that causes the personnel of driving to take, this is that shock absorber 1 did not reach desirable part in design in the past, still remains to be improved.

The model utility content

Main purpose of the present utility model is to be to provide a kind of can slowly reset to promote the shock absorber of comfort.

A kind of shock absorber of the present utility model comprises: an earthen pipe unit, an Oil-gas Separation valve, a piston unit, and a damping unit.The earthen pipe unit comprises a hollow outer tube, and outer tube has one first opposite end, and one second end.The Oil-gas Separation valve can be installed in the outer tube with moving axially, defining a gas space with first end, and defines a fluid space with second end.Piston unit comprises that one can be installed in the piston in the fluid space with moving axially, and the piston rod of second end of a connection piston and the outer tube that stretches through out.The damping unit position is between the piston and second end and contiguous second end, and comprise that one is nested with in the piston unit periphery and the flexible hollow throttle sheet of tool, throttle sheet has outer periphery that radially extend to outward near outer tube, and piston becomes first reserve at Oil-gas Separation valve and piston space, second reserve between piston and throttle sheet with throttle sheet with the fluid separated by spaces, and the 3rd reserve between the throttle sheet and second end.Piston unit can move between a normal position and a compression position with respect to the earthen pipe unit, when being subjected to external force, piston unit can move to compression position by the direction of the past Oil-gas Separation valve in normal position, throttle sheet is under pressure deformation and makes the outer periphery perk away from outer tube when moving, make the fluid in second reserve flow into the 3rd reserve through this apace, and when external force disappears, throttle sheet can be replied shape makes outer periphery near outer tube, fluid in first reserve will promote piston unit and move to the normal position toward second end simultaneously, when moving, the fluid in the 3rd reserve can flow back to second reserve via the slit between throttle sheet and outer tube lentamente.

The beneficial effects of the utility model are: can make the effect that piston unit can reach Fast Compression and slowly extend to have preferable buffering reset effect along with the design of pressure deformation by throttle sheet, can promote the travelling comfort of use.

Description of drawings

Fig. 1 is an a kind of combination cross-sectional schematic of shock absorber in the past, illustrates that a piston unit position is in a normal position;

Fig. 2 is the view of similar Fig. 1, illustrates that the piston unit position is at a compression position;

Fig. 3 is a three-dimensional exploded view of one first preferred embodiment of shock absorber of the present utility model, and the outer tube among the figure is to be the state that is not stamped as yet before being shown in assembling;

Fig. 4 is a combination cross-sectional schematic of first preferred embodiment, illustrates that a piston unit position is in a normal position;

Fig. 5 is the partial enlarged drawing of Fig. 4;

Fig. 6 is the view of similar Fig. 5, illustrates that the piston unit position is at a compression position; And

Fig. 7 is a local cross-sectional schematic of amplifying of one second preferred embodiment of shock absorber of the present utility model, illustrates that a piston unit position is in a normal position.

Embodiment

Below in conjunction with drawings and Examples the utility model is elaborated:

For convenience of description, following embodiment, identical assembly is represented with identical label.

As Fig. 3, Fig. 4 and shown in Figure 5, first preferred embodiment of the utility model shock absorber is on the front fork stem (figure does not show) that is installed on bicycle regularly, and comprises: an earthen pipe unit 2, an Oil-gas Separation valve 3, a piston unit 4, and a damping unit 5.

Earthen pipe unit 2 comprises the outer tube 21 of a upright hollow, outer tube 21 have one below first end 211, and second end 212 in contrast to first end 211.Earthen pipe unit 2 also comprises the coupling seat 22, a secure bond of first end 211 that a sealing is cemented in outer tube 21 at the oil sealing base 23 of second end 212 of outer tube 21, and one regularly the next-door neighbour be installed in the Bearing 24 of oil sealing base 23 belows.

Oil-gas Separation valve 3 can be installed in the outer tube 21 with moving axially, with and the position define an airtight gas space 25 in 22 of the coupling seats of first end 211, and define a fluid space 26 that does not communicate with the gas space 25 at 24 of the Bearings of second end 212 with the position.

Piston unit 4 comprises that one can be installed in the piston 41 in the fluid space 26 with moving axially, and the piston rod 42 of a connection piston 41.Piston 41 has one and is formed on the holding to face 411 of end face.One bottom of piston rod 42 is to pass second end 212 and Bearing 24, and inserts and hold to face 411 and be fixed in the piston 41.

Further piston 41 is constructed with the adjustment pressure in the piston rod 42, piston 41 also has a shaft orientation flowing channel 412 that axially is formed on the bottom, most, and radial communication is to the radial flow path 413 of outer circumferential face outward by shaft orientation flowing channel 412 at each interval, and one wear groove 414 by holding to what face 411 central authorities down were communicated to shaft orientation flowing channel 412.Piston rod 42 also has a screw 421 that axially is formed on the top, and one down axially runs through and be communicated with the perforation 422 of wearing groove 414 by screw 421.In design the quantity of radial flow path 413 can for one, more than two or two.Piston unit 4 comprises that also one can be installed in the control pins of wearing in the groove 414 43, with moving axially and stretches through in perforation 422 and be resisted against operating bar 44 on the control pin 43, and one can be screwed onto in the screw 421 with moving axially and can compress the spiral shell 45 that drives operating bar 44.Because adjusting the pressure structure is not creation emphasis of the present utility model, so no longer describe in detail at this.

5 of damping units are at

piston

41 and 24 of Bearings and be adjacent to Bearing 24, and comprise that one is nested with peripherally and rest on the hollow throttle sheet 51, that holds on face 411 and be nested with peripherally and be placed in the packing ring 52 of throttle sheet 51 at piston rod 42 at piston rod 42, and one be mounted on the piston rod 42 and with packing ring 52 and support the C type clasp 53 that makes throttle sheet 51 location to throttle sheet 51.Throttle sheet 51 is one to have flexible endless metal thin slice, and have one and be pressed on the inner circumference edge that holds on face 411 511, by packing ring 52 and radially extend to outer periphery 512 near outer tube 21 outward by inner circumference edge 511, and four are yearned for the passage 513 that indent is established by outer periphery 512 footpaths respectively.The quantity of passage 513 can be one, two in design, or more than two, can certainly omit not to be provided with, so the quantity that is provided with of passage 513 is not exceeded with present embodiment.

Piston 41 and throttle sheet 51 from bottom to top are separated into first reserve 261 in 41 in Oil-gas Separation valve 3 and piston, one second reserve 262 51 of piston 41 and throttle sheets with fluid space 26, and the 3rd reserve 263 24 of throttle sheet 51 and Bearings.What must illustrate is again, shock absorber is at coupling seat 22, oil sealing base 23, Oil-gas Separation valve 3, piston 41, piston rod 42, and the periphery of member such as control pin 43, is equipped with at least one ring of being made by rubber or silicon Li Kang 6 respectively, in order to sealing gland, oil sealing or leakproof, no longer illustrate at this.

During assembling, above-mentioned member is packed into after the outer tube 21, with the upper/lower terminal wall radial inward punching press bending of outer tube 21, and above corresponding Oil-gas Separation valve 3 with Bearing 24 positions toward interior punching press one location, then in above-mentioned gas space 25, fill air, and in fluid space 26, pour into fluid.Before the use, can look user of service's body weight or road conditions earlier and adjust shock absorber pressure, just rotary screw 45 compresses operating bar 44, drive control pin 43 and shift near or move apart radial flow path 413, in order to the size of control

radial flow path

413 and 412 communication gap of shaft orientation flowing channel, so that adjust the flow of fluid by first and second reserve 261.Just control pin 43 downward total blockage radial flow path 413 and shaft orientation flowing channels 412 at this, its disconnected situation is illustrated.

During use, piston unit 4 can be with respect to earthen pipe unit 2, moves between as shown in Figure 5 a normal position and a compression position as shown in Figure 6.When shock absorber is subjected to external force, piston unit 4 can be moved downward to compression position by the normal position, throttle sheet 51 can be as shown in Figure 6 when moving, be subjected to the resistance of fluid and pressure and produce deformation, make outer periphery 512 up perk away from outer tube 21, make the fluid in second reserve 262 shown in the arrow among the figure, upwards flow into the 3rd reserve 263 through this apace.

And when external force disappears, throttle sheet 51 will be replied shape, make outer periphery 512 outside horizontal stretchings near outer tube 21, fluid in first reserve 261 will be shown in the arrow among Fig. 5 simultaneously, promote piston unit 4 and up move to the normal position, in the time of mobile, the fluid in the 3rd reserve 263 also can be via the slit of 21 of throttle sheet 51 and outer tubes, and passage 513 (see figure 3)s of throttle sheet 51, flow back to second reserve 262 lentamente downwards.

As shown in Figure 7, the structure of second preferred embodiment of the utility model shock absorber is roughly identical with first embodiment, different parts are: piston 41, piston rod 42 are constructed different with the winding of 51 of throttle sheets, the piston 41 of present embodiment also has one by holding to up the contract cutting graftage part 415 of Shu Yanshen of face 411 central authorities, throttle sheet 51 be nested with in the cutting graftage part 415 peripheral and rest on and hold on face 411, and the bottom of piston rod 42 is that to pass the bottom be to pass second end 212 and Bearing 24, and it is peripheral and compress fixedly throttle sheet 51 tightly to be enclosed within cutting graftage part 415.

As shown in the above description, the utility model shock absorber mainly is the design by throttle sheet 51, make when piston unit 4 is mobile with respect to 2 compressions of earthen pipe unit, can see through the deformation of throttle sheet 51 and make fluid flow out apace, and when piston unit 4 reset movement, throttle sheet 51 will be replied original shape and be allowed fluid flow back to lentamente, so effect that can reach Fast Compression and slowly extend, so the utility model can have preferable buffering reset effect, in order to promote the travelling comfort of using, can reach the purpose of this utility model really.

Claims

1. shock absorber, comprise: an earthen pipe unit, the Oil-gas Separation valve that can be installed in the outer tube with moving axially, and piston unit, the earthen pipe unit comprises the outer tube of a hollow, outer tube has opposite one first end and one second end, define a gas space between the Oil-gas Separation valve and first end, and and second end between define a fluid space, piston unit comprises a piston that can be installed in the fluid space with moving axially, and a piston rod that connects second end of the piston and the outer tube that stretches through out, it is characterized in that:

Shock absorber also comprises a position between the piston and second end and the damping unit of contiguous second end, damping unit comprise a slice be nested with in the piston unit periphery and tool flexible and can be along with the throttle sheet of the hollow of pressure deformation, throttle sheet has one and encloses the outer periphery that radially extend to outward near outer tube, and piston becomes a position at first reserve of Oil-gas Separation valve and piston space, second reserve of position between piston and throttle sheet the fluid separated by spaces with throttle sheet, and three reserve of position between the throttle sheet and second end.

2. shock absorber as claimed in claim 1 is characterized in that: throttle sheet also has at least one and directly yearns for the passage that indent is established by outer periphery.

3. shock absorber as claimed in claim 1 is characterized in that: throttle sheet also has a circle and is mounted the inner circumference edge that is positioned between piston and piston rod.

4. shock absorber as claimed in claim 3, it is characterized in that: piston has second end of a contiguous outer tube and supplies throttle sheet by holding to face of putting, it is peripheral and be placed in the packing ring of throttle sheet at piston rod that damping unit comprises that also a slice is nested with, and one is mounted on the piston rod and the C type clasp that packing ring is supported to make the throttle sheet location to throttle sheet.

5. shock absorber as claimed in claim 3 is characterized in that: piston have second end of a contiguous outer tube and for throttle sheet by holding of putting to face, and one by holding to central past second end of the face cutting graftage part that Shu Yanshen is nested with for an end of piston rod of contracting.