CN2053187U

CN2053187U - Dashpot for saddle of bicycle

Info

Publication number: CN2053187U
Application number: CN 89216570
Authority: CN
Inventors: 苏根宝
Original assignee: Individual
Current assignee: Individual
Priority date: 1989-09-02
Filing date: 1989-09-02
Publication date: 1990-02-21

Abstract

The utility model relates to a damper for the lifting of a bicycle saddle, which mainly comprises an outer pipe, a sleeve pipe, a compressed air chamber, a piston, a piston rod, a valve core, a top rod, a support rod, an anti-rotation slide block, a manual device of an operation top rod, etc. The damper for the lifting of a saddle of a bicycle overcomes the rotating problem of the existing lifting chair, improves damping property and simplifies the structure. When a rider rides a bicycle, the height of the saddle can be adjusted at any time, and the damper for the lifting of a saddle of a bicycle has the advantage of convenient operation.

Description

Dashpot for saddle of bicycle

The utility model relates to a kind of bicycle use device, particularly a kind of bicycle saddle lifting shock absorption device.

The height of existing bicycle saddle is regulated, and relies on to unclamp or lock firmly to pull up or depress and finish after saddle clamps bolt and nut, and will use instrument and carry out when stopping, so time-consumingly require great effort again; In addition, the damping of saddle is to be undertaken by the saddle wire spring, because not shock-absorbing of wire spring and poor effect, and with the passing of time easily disconnected by shake.Other has a kind of ED type chair lift, and its seat support is supported on a kind of air-pump type lifting shock absorption device (see figure 1), to reach the purpose that makes seat support lifting and damping.As shown in Figure 1, the housing of this device is a pump housing pipe 10, and its lower end is a plug 14, and its inner top guide plate 3 that is threaded in upper end is installed into piston rod 2 by the centre hole of this guide plate 3 leads.The upper end of piston rod 2 is exposed to outside the pump housing pipe 10 and is connected with above-mentioned seat support (not drawing among Fig. 1), its lower end captive joint one oily piston 7, this piston keep by an O shape in the groove of its underpart periphery circle 11 and pump housing pipe 10 inner round wall between along pump shaft to slipper seal.In the inside of pump housing pipe 10 upper ends; one back up ring of being close to an end face and above-mentioned guide plate 34 is arranged; two rows on the inside and outside disc of this back up ring have four O-ring seals in the annular grooves, respectively and form slide relative sealing and fixing seal between the inner headed face of the periphery of piston rod 2 and pump housing pipe 10.Near in the pump housing pipe 10 of plug 14 1 ends, a gas piston 12 that two O shapes circles 11 are housed is arranged equally, when this piston slides pump housing pipe 10 in, O shape circle and pump housing pipe 10 inwalls maintenance slipper seal.Be filled with the pressure gas (as nitrogen) of certain pressure in the air chamber 13 between this gas piston 12 and the plug 14.Have two radially grooves on the above-mentioned oily piston 7; the inner of these two grooves communicates with the central through hole of oily piston 7; its outer end communicates with the top periphery of oily piston 7 and the narrow crack between pump housing pipe 10 inner headed faces; that is to say; chamber 15 between gas piston 12 and oily piston 7; and the chamber 6 between oily piston 7 and back up ring 4, the central through hole by above-mentioned two grooves and oily piston 7 communicates.In this chamber that communicates 15 and 6 etc., be full of hydraulic oil.In addition, center slotted hole through piston rod 2 inserts a push rod 1 in export-oriented pump housing pipe, it can move by easy on and off in piston rod 2, captive joint one spool 8 on the inside insertion end of push rod 1, this spool can move freely in the central through hole of above-mentioned oily piston 7 vertically, and relies on three O shapes circles being positioned on this spool periphery to keep the slipper seal of the central through hole wall of it and oily piston 7 simultaneously.Like this, when spool 8 was in as shown in Figure 1 position, the oil circuit in two chambeies just was cut off up and down; When spool 8 was depressed to the below O shape circle that makes on it and enters the below center cone porose area of oily piston 7, groove was opened and is made up and down that oil circuit is communicated with.By as seen above-mentioned, after the people takes this kind chair lift, be pressed on the oily piston 7 by piston rod 2, the power transmission of oil in chamber 15 is pressed towards down gas piston 12 and gas in the compression air chamber 13.When need raise seat support, make the people be lifted away from seat support a little so that gas piston 12 by the top upwards, meanwhile, is depressed push rod 1 spool 8 is moved down, thereby got through oil circuit up and down.Along with moving on the gas piston 12, oil is flow into the chamber 15 of below from connectivity slot gradually by compression in the chamber 6.In case with drawing on the push rod 1 when closing spool 8, behind the fluid force balance, make seat support rise to a new position up and down, at this moment, just changed the height of seat support after the people occupies stably on it again.

From the above, though this air-pump type lifting shock absorption device chair with adjustable height, structure is still complicated, and the problem that exists seat support to rotate around axial rotation with piston rod and oily piston, the problem that should solve when this is used for supporting bicycle saddle just.

The purpose of this utility model is to simplify the structure of above-mentioned air-pump type lifting shock absorption device, can not take place around axial rotation after providing a kind of bicycle saddle lifting shock absorption device to make saddle be contained in above it, and but the limit regulates saddle height in the limit by bike, and is easy to operate, and damping property is better.

For achieving the above object, bicycle saddle lifting shock absorption device of the present utility model comprises outer tube, plug, guide collar, back up ring and O-ring seals thereof, piston and O-ring seals thereof, piston rod, push rod, spool and O-ring seals thereof, it also comprises one in outer tube and the air chamber between plug and piston; One in outer tube and the air chamber between piston and back up ring; One coaxial line is fixed on outer tube or the back up ring with its lower end removably and its upper end is the hollow circular sleeve of opening, and it axially has at least one length obviously greater than the wide groove of piston range in this casing wall upper edge; One has at least one can insert at least one groove and width is slightly less than the anti-rotation slide block of the wide end of groove, and it is movably connected with the piston rod upper end in sleeve pipe, can be free to slide along above-mentioned groove in the piston maximum travel limit; One external diameter that injects between sleeve pipe and the push rod is slightly less than the support tube of warp can be free to slide in the sleeve pipe in sleeve pipe in the piston range, its below insertion end links to each other with the anti-rotation slide block, and the manual unit that push rod can be depressed.

Be example now,, describe structure of the present utility model and principle thereof in detail in conjunction with the accompanying drawing of this embodiment to implement an embodiment of the present utility model, thus can clear understanding advantage of the present utility model place.

Above-mentioned accompanying drawing, promptly Fig. 2 is the structural representation of the bicycle saddle lifting shock absorption device of the foregoing description; And Fig. 1 is the structural representation (front has explained, repeats no more) of the lifting shock absorption device used of existing chair lift.

As shown in Figure 2, it is described to the part-structure of device shown in Figure 1 to be similar to the front, the bicycle saddle lifting shock absorption device of this embodiment also has a Long Circle hollow outer pipe 10, and shut with a plug 14 its lower end, and its upper end has externally threaded guide collar 3 by its negative thread and and captives joint.There is a back up ring 4 lower surface of being close to this guide collar, and it is mounted on twice O shape circle 5 on its periphery and the sealing between outer tube 10 inwalls and is fixed in the close vicinity of guide collar 3.The centre hole that passes two coaxial lines of back up ring 4 and guide collar 3 has a piston rod 2, and its periphery and be contained in the twice O shape circle 5 on 4 inner headed faces of back up ring and be contained between the O shape circle 18 on the guide collar 3 is keeping the slipper seal contact.Lower end captive joint one piston 7 of described piston rod 2, it can be between plug 14 and back up ring 4 in outer tube 10 easy on and off slide, and keep slipper seal between the inwall by one O shape circle 5 on its periphery and outer tube 10.Between piston 7 and plug 14, and be respectively the air chamber 23 and 27 of compressed air suits (as bottled compressed nitrogen) in outer tube 10 inner chambers between piston 7 and back up ring 4.The center slotted hole that passes piston rod 2 has a push rod 1, and stretch out outside the piston rod 2 on its top, and a upper surface that is positioned at the spool 8 of piston 7 centre holes is withstood in its lower end, has the twice O shape circle 9 and the center hole wall of piston 7 to keep slipper seal on the spool 8.Depressed by push rod 1 and the one O shape circle in below broken away from contact and when entering the circular cone porose area of piston 7 bottoms when spool 8 with piston 7 center hole walls, be positioned at one on the piston 7 radially groove above-mentioned air chamber 23 is connected with 27.

As seen by above-mentioned, this embodiment does not have the piston 12 in as shown in Figure 1 the chair lift lifting shock absorption device; In addition, without hydraulic oil, and replace and charged into pressure gas having both sides 23 and 27 with the piston 7 of the present embodiment of former piston 7 identical functions.Like this, simplify part-structure, improved damping performance (seeing the back explanation for details) again.

In addition; for reaching the utility model purpose; improvement place of present embodiment also comprises: as shown in Figure 2; be screwed a Long Circle sleeve pipe 16 on the outside thread of above-mentioned guide collar 3 removably; the upper end of the piston rod 2 that itself and outer tube 10 coaxial lines, its length move on can making when piston 7 goes upward to back up ring 4 in company with piston is starkly lower than its upper end.On the tube wall of this sleeve pipe 16, axially have two long grooves that wait width of symmetry along it, its length is obviously greater than the range of piston 7, and the anti-rotation slide block 22 that the position at the whole story that requires groove can guarantee and the upper end of piston rod 2 flexibly connects can freely slide up and down in this groove in the piston maximum travel limit, this anti-rotation slide block is side's flat member, base thickness is slightly less than the width of above-mentioned groove, so that insert in two grooves of above-mentioned symmetry at its both ends, there is a rectangular indentation its underpart, one side of breach has a little flange, the one boss edge on above-mentioned piston rod 2 tops just can be hooked on this little flange, so that can will move in piston rod 2 pullings when moving on the anti-rotation slide block 22.In addition, the center of described anti-rotation slide block 22 has the external diameter of a diameter greater than above-mentioned push rod 1, so that the centre hole of anti-rotation slide block 22 is passed on the top of push rod 1 smoothly.Other have an external diameter to be slightly less than the internal diameter of sleeve pipe 16 and internal diameter greater than the hollow of the piston rod 2 external diameters stay tube 21 of drawing money on credit, its lower end has the rectangular through hole of two symmetries, its size be able to make the firm inserting in the both ends of above-mentioned anti-rotation slide block 22 in wherein, its upper end then supplies the stationary bicycle saddle, like this, but support tube 21 up-and-down movements and can not rotating make bicycle saddle be able to constant bearing.The top of above-mentioned push rod 1 direct puncture is vertically gone in this support tube.

Handle above-mentioned spool 8 by the pressing action of push rod and move down for making, other establishes one and depresses the manual unit 20 that push rod is used, and wherein a kind of form of this device comprises a jacking block 25 and one handle 26.Jacking block 25 profiles are a cylinder basically, its external diameter is slightly less than the internal diameter of support tube 21, can in support tube 21, sliding by easy on and off, its bottom has a diameter to be slightly larger than the round pit of push rod 1 upper end external diameter, push rod 1 upper end secure fit is in this pit, and its center of top has the straight groove at the perforation top of first-class width.Handle 26 is captiveed joint the plate stem of (as being threaded) by a bend pipe, that is 90 ° basically with the heading and of this bend pipe one end seam and is formed with the bend pipe other end.Above-mentioned bend pipe passes a small sircle hole that is positioned on support tube 21 tube walls, and makes this small sircle hole become one around its supporting that handle 26 is swung.Determining of the axial location of this small sircle hole on support tube 21, should make after spool 8 is in original off position, in case spool can be ejected downwards when upwards pulling the tommy bar of handle 26 and air chamber 23 and 27 is communicated with and heading on the handle 26 withstands on the straight groove floor in top of jacking block 25 all the time, thereby this small sircle hole should be in passing through the plane of described straight groove in the orientation on support tube 21 walls.The another kind of form of above-mentioned manual unit, can adopt a jacking block and is the eccentric cam that rotates perpendicular to support tube 21 axis directions that winds of rotating support point with support tube 21 perisporiums, make this cam press closer the upper surface of jacking block, rely on support tube 21 outsides and manually make cam rotation, thereby push rod 1 is depressed (do not draw in addition and represented).

Operation of the present utility model and principle are as follows: after taking the saddle (not shown) that is connected support tube 21 upper ends as the cyclist, human body forces in support tube 21, anti-rotation slide block 22, piston rod 2, thereby with piston 7 to pressing down, behind the O shape circle and the friction force between outer tube 10 inwalls that have overcome on the piston 7, make piston 7 to lower slider.Meanwhile, the cyclist upwards pulls handle 26, thereby the effect by jacking block 25, push rod 1 is depressed spool 8 and opened and be positioned at the radially groove that being used on the piston 7 is communicated with air chamber 23 and 27.Like this, except that fraction pressure gas with pressure flows into the air chamber 27 through radial slot from air chamber 23, most of gas is gradually reduced in air chamber 23 by piston.When saddle or piston drop to by the lowest order of a certain maximum pressure institute balance in the air chamber 23, saddle is on the minimum balance position, but this moment release handle 26, this moment, spool turned back to original off position again under the gaseous tension of air chamber 23, once more groove was closed.When human desires is raised saddle height by bike, step temporarily is lifted away from human body or has weighed in the hand and simultaneously handle 26 is upwards pulled as long as the cyclist stands, under the maximum pressure effect of the gas of piston 7 in air chamber 23, overcome the friction force that the O shape circle on it causes, to lower slider, at this moment, gas in the air chamber 27 backflows because of the groove of pressurized on piston in the air chamber 23, when treating that piston is raised to a certain height, release handle 26, spool 8 is closed groove once again, because the increase of tolerance in the air chamber 23, human body is occupied stably after on the saddle, just enters the position of a new high degree, and saddle is raise.

In addition, found out by above-mentioned, the top ripple takes place for the moment in riding, human body is pressed in after weight on the piston 7 overcome the friction force of one O shape circle on the piston 7, instantaneous impulsive force with promptly make piston be back to original position again after pressure in the air chamber 23 acts on mutually, to play cushioning effect.And chair lift device as shown in Figure 1 since need overcome on the oily piston 7 and gas piston 12 on the resistance of totally three road O shapes circle, so much slow in reacting to sudden shock, so the former damping property obviously is better than the latter.

In sum, this Dashpot for saddle of bicycle of the present utility model can conveniently be regulated saddle height by bike the time, time saving and energy saving, and has obvious damping property, makes the cyclist quite feel comfortable.

Claims

1, a kind of bicycle saddle lifting shock absorption device comprises outer tube 10, plug 14, guide collar 3, back up ring 4 and O-ring seals 5 thereof, piston 7 and O-ring seals 5 thereof, piston rod 2, push rod 1, spool 8 and O-ring seals 9 thereof is characterized in that, also comprise one in described outer tube 10 and the air chamber 23 between described piston 7 and plug 14; One described outer tube 10 by and air chamber 27 between described piston 7 and back up ring 4; One with its lower end removably coaxial line be fixed on described outer tube 10 or the back up ring 4 and its upper end is the hollow circular sleeve 16 of opening, it axially has at least one length obviously greater than the wide groove of described piston 7 ranges in described sleeve pipe 16 perisporium upper edges; One has at least one can insert in described at least one groove and width is slightly less than the anti-rotation slide block 22 of the wide end of described groove, it is movably connected with described piston rod 2 upper ends in described sleeve pipe 16, and can be free to slide along described groove in described piston 7 maximum travel limit; One inject between described sleeve pipe 16 and the push rod 1, external diameter is slightly less than described sleeve pipe 16 internal diameters to draw the support tube 21 that can be free to slide in the journey in described piston 7 maximums in described sleeve pipe 16, its below insertion end links to each other with described anti-rotation slide block 22, and the manual unit 20 that described push rod can be depressed.

2, bicycle saddle lifting shock absorption device as claimed in claim 1 is characterized in that, it axially has the wide groove of two symmetries in described sleeve pipe 16 wall upper edges, and the opposite end portion of described anti-rotation slide block 22 inserts in the groove of described two symmetries.

3, bicycle saddle lifting shock absorption device as claimed in claim 1 or 2, it is characterized in that, described manual unit 20 comprise one can be in described support tube 21 along pipe 21 axially slide up and down and be installed in the circular hole on described support tube 21 walls with jacking block 25 and that the upper end of described push rod 1 is fixedly linked, the upper surface of described jacking block 25 is close in its inner end and the handle 26 described support tube 21 walls outside is stretched out in its outer end, the position of wherein said circular hole should make when serving as to support can make its inner end withstand the upper surface of described jacking block 25 all the time when upwards pulling described handle 26 with this circular hole.

4, bicycle saddle lifting shock absorption device as claimed in claim 1 is characterized in that insertion end has the cross through hole of two symmetries below described support tube 21, its shape with the size be able to the both ends secure fit of described anti-rotation slide block 22.