CN2434473Y - Liquid-gas separating bicycle shock absorber - Google Patents

Abstract

The utility model relates to a liquid gas separating type automatic shock absorber, which comprises an outer tube. A piston which can separate the interior of the outer tube into gas compression space and oil liquid space is arranged inside the outer tube. The end part of the gas space which is formed by the outer tube is provided with a gas intake seat which can seal the outer tube. The end part of the oil liquid space which is formed by the outer tube is provided with a piston rod. One end of the piston rod is connected with the piston, and a through hole is arranged on the piston. An inner oil seat for positioning is arranged inside the oil pressure space, and is provided with a plurality of oil through holes. The lower end of each oil through hole is communicated by an annular slot. The lower end of the inner oil seat is fixedly provided with an oil throttle sheet and a spring. The shock absorber has the advantage of strong practicability, and the comfortability of riders can be enhanced by using the shock absorber.

Description

Liquid gas separated type automatic shock-proof device

The utility model relates to the fitting device on a kind of bicycle, particularly a kind of liquid gas separated type automatic shock-proof device.

Generally ride when sailing bicycle, if do not design any shock absorbing device on the bicycle skeleton, the sensation of ground relief directly is passed to rides the person of sailing, cause the person of riding uncomfortable, be head it off, general manufacturer just is provided with various shock absorbing apparatus at the skeleton appropriate location of bicycle, as front fork place, bench hassock tube place, rides discomfort when sailing bicycle with reduction.

The purpose of this utility model is to provide a kind of liquid gas separated type automatic shock-proof device of tool buffer function.

Another purpose of the present utility model is to provide a kind of liquid gas separated type automatic shock-proof device of adjusting damping function that has.

For achieving the above object, the utility model is taked following technical measures:

Liquid gas separated type automatic shock-proof device of the present utility model, comprise an outer tube, be provided with a floating piston that the outer tube inner area can be divided into gas compression space and fluid space in the outer tube, the end that outer tube forms the gas compression space is provided with the air inlet seat that can seal outer tube, the end that outer tube forms the fluid space is provided with a piston rod that stretches into outer tube, one end of piston rod connects described piston, and piston is provided with a through hole;

Be provided with the internal oil seat of a location in the oil pressure space, internal oil seat offers the oil through of a plurality of axial perforations, each oil through lower end communicates with an annular groove, and the internal oil seat lower end is installed with throttle sheet and spring of a tool groove, and the groove of throttle sheet also communicates with annular groove.

Wherein: be provided with pad between described spring and throttle sheet.

Wherein: described throttle sheet and spring lower end are located by a wrist pin, and wrist pin is installed on the internal oil seat.

Wherein: the through hole of described piston is located at centre, the piston periphery runs through and is provided with the cross-drilled hole that is communicated with through hole, is provided with a regulating device in the piston rod, and regulating device has the ejector pin that can adjust high and low position, the ejector pin upper end has the adjustment part of a taper, and the adjustment part is positioned at the through hole of piston.

Wherein: the ejector pin lower end of described regulating device forms the top-holding part that diameter is bigger, and regulating device also includes an actuating strut, an adjustment nut and a spring;

Actuating strut and adjustment nut are tight against the lower end at ejector pin in regular turn, adjust nut and are arranged in adjustably in the tapped hole of piston-rod lower end, and spring housing is located at the ejector pin outside, and supports between the top-holding part of piston and ejector pin.

It is as follows by embodiment and accompanying drawing liquid gas separated type automatic shock-proof device of the present utility model to be elaborated, in the accompanying drawing:

Fig. 1 is the utility model liquid gas separated type automatic shock-proof device embodiment's a three-dimensional exploded view.

Fig. 2 is the utility model embodiment's a assembled sectional view.

Fig. 3 is the piston generalized section of operating state up among the utility model embodiment.

Fig. 4 is the amplification profile schematic representation when piston rod and piston move on not among the utility model embodiment.

Fig. 5 is piston rod and the amplification profile schematic representation of piston when last moving among the utility model embodiment.

Fig. 6 is the generalized section that floating piston bears thrust rating under the pressurized gas among the utility model embodiment.

Fig. 7 is the amplification profile schematic representation that throttle sheet was opened when piston rod down resetted among the utility model embodiment.

Fig. 8 is the down adjusted generalized section of the utility model embodiment middle regulator.

As shown in Figures 1 and 2, liquid gas separated type automatic shock-proof device of the present utility model, outer tube 1 with a hollow tubular, the top of outer tube 1, inside and bottom, be equiped with a frame bowl 11, a floating piston 2 and a piston rod 3 that penetrates outer tube 1 inside respectively, 3 in floating piston 2 and piston rod are equiped with an internal oil seat 4, and can combine (not shown) with the front fork of bicycle by frame bowl 11 and piston rod 3, so that whole shock absorber group is located on the front fork of bicycle, the shock-proof effect of necessity when providing bicycle to advance.

Frame bowl 11 lower ends 111 diameters are less and can support into outer tube 1 inside, and lower end 111 down compresses an air inlet seat 12, outer tube 1 is provided with the spacing draw-in groove 13 of a ring invaginated type in corresponding air inlet seat 12 root edge positions, so that air inlet seat 12 restriction location, be provided with a valve 15 in the air inlet seat 12, make 2 of air inlet seat 12 and floating pistons form an air pressure space, air inlet seat 12 peripheral envelope are provided with one and the contacted circular ring 121 of outer tube 1 inwall, to avoid gas leakage.

Floating piston 2 is located in the outer tube 1 and outer tube 1 inside is completely cut off into two-part, is gas compression space 50 in floating piston 2 upper ends, and the lower end is fluid space 60, and floating piston 2 peripheries and sheathed circular ring 21 are so that gas separates really with fluid.

Piston rod 3 upper ends are provided with a piston 31, piston 31 is positioned at fluid space 60, piston 31 axially offers a through hole 311 in centre, and be interval with groove 312 at piston 31 lower end peripheries, each groove 312 periphery is provided with radially a plurality of cross-drilled holes 313 that extend, and each cross-drilled hole 313 also connects with through hole 311.Outer tube 1 is provided with in the end inside that piston rod 3 is set and can axially runs through wherein bearing 16, oil sealing 17 and oil sealing base 18 for piston rod 3, by bearing 16, oil sealing 17 and oil sealing base 18, can make the end in the oil pressure space that forms in the outer tube 1 be the state of sealing, to avoid taking place oil leakage phenomenon, 3 in bearing 16 and piston rod are provided with a lining 19, to utilize lining 19, make piston rod 3 bearing 16 and outer tube 1 slip relatively swimmingly.

Internal oil seat 4 is fixed in the fluid space 60, its orientation type is at the upper-lower position place of outer tube 1 periphery corresponding to internal oil seat 4, form a pair of spacing draw-in groove 14, borrow two spacing draw-in grooves 14 to make internal oil seat 4 be fixed on the appropriate position of outer tube 1 and be positioning states, be positioned at the last space 61 that internal oil seat 4 tops are fluid spaces 60 this moment, and when piston rod 3 drive pistons 31 up move, shown in Fig. 3 figure, just piston 31 lower ends form down space 62.In addition, internal oil seat 4 is provided with a plurality of oil throughs that axially run through 41, each oil through 41 lower end communicates with an annular groove 42, and be fitted with a wrist pin 43 in internal oil seat 4 central authorities, wrist pin 43 lower ends are down extended suitable length and are arranged with a throttle sheet 44 from top to bottom, a pad 45 and a spring 46, the cap portion 431 that forms a wide and flat shape by wrist pin 43 bottoms supports in spring 46 bottoms, make throttle sheet 44, pad 45 and spring 46 up are pressed on internal oil seat 4, oil through 41 is towards the lower end of piston 31 directions, throttle sheet 44 peripheries are arranged with and are formed up to a minority groove 441 that communicates with annular groove 42, and, make throttle sheet 44 and annular groove 42 be the close contact state by the top system of spring 46.

In addition, piston rod 3 inside are provided with a regulating device 7, regulating device 7 includes: ejector pin 71, actuating strut 72, one adjust nut 73 and a spring 74, the upper end of ejector pin 71 forms the adjustment part 711 of a taper, the lower end forms the bigger top-holding part 712 of diameter, spring 74 is set in the outside of ejector pin 71, and two ends also support in the lower end of piston 31 712 of default nose bars 314 and top-holding part, and top-holding part 712 peripheries also are provided with several circular ring 713.Actuating strut 72 is positioned at ejector pin 71 lower ends, and lower end and adjustment nut 73 close contact, be arranged in the default tapped hole 32 in piston rod 3 lower ends and adjust nut 73, when nut 73 is adjusted in rotation, just can change the high and low position of actuating strut 72 and ejector pin 71, and be positioned at through hole 311 because of the adjustment part 711 of ejector pin 71, therefore, can make the relative position change of 311 of adjustment part 711 and through holes by adjusting action, make the fluid amount by through hole 311 difference be arranged because of the variation of gap length.

The liquid gas separated type automatic shock-proof device of present embodiment, can organize and be located on the default position of bicycle, when riding when sailing bicycle, if the road surface produces when shaking because of uneven, this shaking force just can be conveyed to piston rod 3 places, as shown in Figure 3, piston 31 is up moved, when piston 31 up moves, because of through hole 311, make part fluid via through hole 311, cross-drilled hole 313 and groove 312 and enter down space 62 by fluid space 60, the state before and after piston 31 actions is respectively as Fig. 4, shown in Figure 5, before the action, after fluid change, if the internal diameter of outer tube 1 is d, the external diameter of piston rod 3 is d1, and piston 31 is when up moving 1 unit distance, and the volume in fluid space 60 reduces π d ²/ 4, the volume in following space 62 increases π (d ²-d ₁ ²)/4, the volume of this increase flow to down space 62 by the fluid in fluid space 60 via through hole 311, cross-drilled hole 313 and groove 312 and fills up.

Because fluid has the character of incompressibility, therefore towering d is arranged still ₁ ²/ 4 fluid volume must up be pushed, and enter the last space 61 in fluid space 60 via the groove 441 of throttle sheet 44, on fluid enters during space 61, just can push against floating piston 2 simultaneously up moves, with with the gas compression in the gas compression space 50, and, therefore have good cushioning effect because of the fluid in the fluid space 60 is to continue to enter with predetermined amount of flow to go up space 61, can avoid gas compression space 50 to produce unexpected reaction force because of unexpected thrust.

When the external force of passing on when ground disappears, as shown in Figure 6, pressurized gas in gas compression space 50, floating piston 2 down can be pushed against, the pressure of fluid moment increase this moment is by oil through 41, annular groove 42 is conveyed to throttle sheet 44, and the downward translation state that throttle sheet 44 is produced as shown in Figure 7, make fluid be back to fluid space 60 rapidly, and put on piston 31 thrust down, the fluid that makes space 62 under former being positioned at is also via groove 312, slotted eye 313 and through hole 311 and get back to fluid space 60, recover state shown in Figure 2, this moment, spring 46 reached balance because of the pressure in last space 61 and the pressure in fluid space 60, and returned to the state that throttle sheet 44 is made on the top.

Compared with prior art, the utlity model has following effect:

The shock absorber of above-mentioned tool pooling feature cooperates adjusting device 7 of the present utility model again, just can By the high and low position of adjusting ejector pin 71, change the damping force that puts on piston 31, when borrowing Down spiral shell moves when adjusting screw 73, and ejector pin 71 will move down when being adjusted to position shown in Figure 8, This moment is because of the gap increasing of 711 of through hole 311 and adjustment parts, therefore, and when the work of piston rod 3 When plug 31 up moved, the resistance that flow in the lower space 62 via through hole 311 reduced, and reaches To the effect that showing of adjusting damping force.

The utility model not only can make shock absorber when bearing external force, makes the speed of fluid to relax Come pushing floating piston 2 up to move, and possess the function of buffering, and further by accent Engagement positions 7 makes it have the adjustable effect of damping concurrently, and this shock absorber is practical, uses this Shock absorber can make the vibration of bicycle slow down, and improves cyclist's comfortableness.

Claims (5)

1, a kind of liquid gas separated type automatic shock-proof device, it is characterized in that: comprise an outer tube, be provided with a floating piston that the outer tube inner area can be divided into gas compression space and fluid space in the outer tube, the end that outer tube forms the gas compression space is provided with the air inlet seat that can seal outer tube, the end that outer tube forms the fluid space is provided with a piston rod that stretches into outer tube, one end of piston rod connects described piston, and piston is provided with a through hole;

Be provided with the internal oil seat of a location in the oil pressure space, internal oil seat offers the oil through of a plurality of axial perforations, each oil through lower end communicates with an annular groove, and the internal oil seat lower end is installed with throttle sheet and spring of a tool groove, and the groove of throttle sheet also communicates with annular groove.

2, automatic shock-proof device according to claim 1 is characterized in that: be provided with pad between described spring and throttle sheet.

3, automatic shock-proof device according to claim 1 is characterized in that: described throttle sheet and spring lower end are located by a wrist pin, and wrist pin is installed on the internal oil seat.

4, automatic shock-proof device according to claim 1, it is characterized in that: the through hole of described piston is located at centre, the piston periphery runs through and is provided with the cross-drilled hole that is communicated with through hole, be provided with a regulating device in the piston rod, regulating device has the ejector pin that can adjust high and low position, the ejector pin upper end has the adjustment part of a taper, and the adjustment part is positioned at the through hole of piston.

5, automatic shock-proof device according to claim 4 is characterized in that: the ejector pin lower end of described regulating device forms the top-holding part that diameter is bigger, and regulating device also includes an actuating strut, an adjustment nut and a spring;

Actuating strut and adjustment nut are tight against the lower end at ejector pin in regular turn, adjust nut and are arranged in adjustably in the tapped hole of piston-rod lower end, and spring housing is located at the ejector pin outside, and supports between the top-holding part of piston and ejector pin.

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