CN2422168Y - Cylinder-type automobile vibration-damper - Google Patents

Abstract

The utility model relates to a cylinder-type vibration damper for automobiles, which cancels a middle sleeve of the original vibration damper. In the utility model, a middle shaft 2, the upper end of which is provided with a threaded rod 1 penetrates through a center hole of an upper end cover 4 to be directly arranged in an outer sleeve 14, and the both ends of the outer sleeve 14 are sealed; the inner of the middle shaft 2 is provided with a main oil storage room 5, a main oil storage room mouth arranged on the lower end of the middle shaft 2 is provided with a one-way valve 11 which allows egression rather than entry, and the lower end and a lower excircle of the middle shaft 2 are provided with pistons 10 and 12 which can slide up and down on the inner wall of the outer sleeve; the piston 10 is provided with a one-way valve 7 which allows entry rather than egression, the lower part of the middle shaft 2 is provided with an oil guiding hole 6 which is used for balancing the oil quantity of the inner and the external of the main oil storage room 5, and the piston 12 is also used as a positioning ring. The utility model has the advantages of high durability, no deformation, good sealing performance, simple installation and manufacture, material saving, labor saving, low cost and high stability of a housing.

Description

The cylinder type vehicle shock absorber

The utility model relates to a kind of cylinder type vehicle shock absorber, specifically is a kind of cylinder type vehicle shock absorber that is installed between vehicle wheel shaft and the vehicle body.

The cylinder type vehicle shock absorber of original technology is made up of overcoat, intermediate sleeve and the axis that is provided with piston, forms oil storage space between intermediate sleeve and the overcoat.During the vehicle body upthrow, axis drives piston stroking upward, the oil of piston upper end flows to oil storage space through interior set upper side, forms the one-way valve opens of pull of vacuum with the intermediate sleeve lower end in the intermediate sleeve of piston lower end, and the oil of oil storage space lower end is entered in the intermediate sleeve of piston lower end; When vehicle body pressed down, axis drove descent of piston, and the oil in the intermediate sleeve backs down in the intermediate sleeve that the check valve that is located at the piston lower end enters the piston upper end, till the lower extreme point that overlaps in piston arrives.Because piston is the oil pressure balance at two ends up and down, thereby has reduced vehicle body upthrow, the amplitude when pressing down, and reaches the purpose of vibration damping.But the above shock absorber exists following defective and deficiency, one, the upper end of intermediate sleeve and overcoat and axis are unfixing, and leak tightness imprecision, automobile bumpiness and piston make the intermediate sleeve swing up and down, cause the distortion of overcoat, intermediate sleeve and the wearing and tearing of seal ring are caused leakage of oil, have a strong impact on the service life of shock absorber.Two, because the setting of intermediate sleeve makes installation and processing all become complicated, and consumptive material, take a lot of work, cost is big.

The purpose of this utility model is to overcome above defective, provides a kind of durable, indeformable, good seal performance, long service life, good stability, the simple and material-saving of installation and processing, saving of labor, the cylinder type vehicle shock absorber that cost is low relatively.

The later-model purpose of this reality is achieved in that this cylinder type vehicle shock absorber, comprise that the upper end is the axis of screw rod, piston, fuel tap and overcoat, the bottom end cover of overcoat and the sealing of overcoat lower end, the overcoat upper end cover is fixed on the upper end and the sealing of overcoat, the overcoat upper end cover is provided with guide arm and the seal ring that matches with the axis external diameter, axis can move axially in guide arm and seal ring, is characterized in cancelling the intermediate sleeve of former shock absorber, and interior axle is directly installed in the overcoat; Be provided with the main oil cabinet that extends vertically in the axis, axis lower end master's oil cabinet mouth is provided with the check valve of only export but no import; Be respectively equipped with piston on axis lower end and the bottom cylindrical, the cylindrical of piston and outer casing inner wall liquid sealing, piston slides up and down in overcoat; The piston of lower end only is provided with to the enterprising check valve that does not go out downwards, is provided with a radially oil guiding hole on the axis between the two-piston at least, makes the oil mass and the oil pressure balance of the secondary oil cabinet between the outer two-piston of main oil cabinet and axis; The piston double as that is located at the bottom limits the limit coil of axis upward position.

When the vehicle body upthrow, axis drives piston stroking upward, and the unidirectional fuel tap of piston cuts out under the application force of spring, and the bottom compartment produces pull of vacuum in the overcoat of piston lower end, the unidirectional fuel tap of main oil cabinet bottom is opened, and the oil of main oil cabinet enters the interior bottom compartment of overcoat of piston lower end.When vehicle body pressed down, axis drove descent of piston, the unidirectional fuel tap of main oil cabinet cuts out under the effect of spring force, and the unidirectional fuel tap on (being located at the lower end) piston is opened by the oil pressure of bottom compartment in the overcoat, and oil enters secondary oil cabinet.Vehicle body upthrow or press down and go through evil more, the opening of fuel tap big more (till limit coil arrives top dead point or axis lower surface and arrives bottom dead point), on the contrary then little, to realize the purpose of vibration damping.Oil guiding hole is the oil mass of the major and minor oil cabinet of balance and oil pressure all the time also, reaches underfeed and guarantees the effect of piston lubrication.

Because adopt above structure, the utility model cylinder type vehicle shock absorber has been cancelled original intermediate sleeve, axis is directly installed in the overcoat, overcoat, axis are all durable indeformable, do not damage seal ring yet, good seal performance, effectiveness in vibration suppression is obvious, long service life, and processing and fabricating is simple, and is easy for installation, and the material-saving saving of labor, cost reduces relatively, good stability.

Below in conjunction with drawings and Examples the utility model is described in further detail.

Accompanying drawing is this cylinder type vehicle shock absorber structural representation.

As shown in drawings, overcoat 14 adopts steel pipe manufacturing, and its bottom end cover 8 is crimped on overcoat 14 lower ends, and overcoat upper end cover 4 is crimped on the upper end of overcoat 14.End cap also all can adopt form such as screw thread to tighten up but must sealing up and down.Axis 2 profiles are cylindrical, and the screw rod 1 and the axis 2 of its upper end are an integral body, and screw rod 1 is used for being fixed tightly on the vehicle body.The center of overcoat 14 upper end covers 8 is provided with guide arm 3 and the seal ring 15 that matches with axis 2 external diameters, guide arm 3 can adopt making such as cast iron, cast steel, carbon steel, engineering plastics, seal ring 15 can adopt making such as soft rubber, and axis 2 can move axially in guide arm 3 and seal ring 15.Axis 2 is directly installed in the overcoat 14, has cancelled the intermediate sleeve of original cylinder type vehicle shock absorber.Overcoat 14 bottom end covers 8 inner bottom surfaces are provided with recoil spring 9.Be provided with the main oil cabinet 5 that extends vertically in the axis, main oil cabinet 5 connects downwards to axis 2 lower extreme points, be provided with the check valve 11 of only export but no import at axis 2 lower end master's oil cabinet mouths, the check valve 11 general limit-type valve structures of spring that adopt the combustion engine of ordinary skills.When axis 2 was up, the bottom compartment formed pull of vacuum and the valve block of opening check valve 11 makes oil enter bottom compartment in the overcoat of piston 10 lower ends in the piston 10 lower end overcoats.The upper end of main oil cabinet 5 can be blind hole, also can extend axially the filler port of upper surface to use as makeup oil to screw rod 1, but the oil cabinet diameter in the screw rod only has passage just less than the diameter of the oil cabinet in the axis, and filler port seals (not shown) with the plug of living.For guaranteeing the intensity of screw rod 1, filling passage can not established in it yet, and beats inclined hole and establish plug from the upper surface of axis 2.Also can not establish filler port and plug, because oil need not replenish in general.Axis 2 lower ends and bottom cylindrical are provided with piston 10,12, can establish piston ring on the cylindrical of piston 10,12 and overcoat 14 inwall liquid sealings ( piston 10,12 external diameters the are slightly less than overcoat 14 internal diameters) piston, and piston 10,12 slides up and down at overcoat 14 inwalls.Piston 10 only is provided with to the enterprising check valve that does not go out downwards 7, check valve 7 is same adopt the common limit-type valve structure of spring (two check valves also all can adopt other structures, as long as can be full unidirectional into and out of and be convenient to installation).At least be provided with a radially oil guiding hole 6 on the axis 2 between the two- piston 10,12, be generally two, promptly cross axis 2 from axis 2 sides, oil guiding hole 6 makes the oil mass and the oil pressure balance of the secondary oil cabinet 16 between main oil cabinet 5 and the axis 2 outer two-pistons, piston 12 double as limit the limit coil of axis 2 upward position, and limit coil 12 generally is located at following 1/3rd places of axis 2 axial locations.Axis 2, piston 10, piston are that limit coil 12 is all made of steel.Be provided with buffering ring 13 in the upper end of limit coil 12, impact with the rigidity of the guide arm 3 that slows down 12 pairs of upper end covers 14 of limit coil, buffering ring 13 can adopt plastics, rubber to make.

Claims (3)

1, a kind of cylinder type vehicle shock absorber, comprise that the upper end is the axis (2) of screw rod (1), piston (10), fuel tap and overcoat (14), the bottom end cover (8) of overcoat (14) and the sealing of overcoat (14) lower end, overcoat upper end cover (4), be fixed on the upper end and the sealing of overcoat (14), overcoat upper end cover (4) is provided with guide arm (3) and the seal ring (15) that matches with axis (2) external diameter, axis (2) can move axially in guide arm (3) and seal ring (15), it is characterized in that cancelling the intermediate sleeve of former shock absorber, interior axle (2) is directly installed in the overcoat (14); Be provided with the main oil cabinet (5) that extends vertically in the axis (2), axis (2) lower end master's oil cabinet (5) mouth is provided with the check valve (11) of only export but no import; Axis (2) lower end and bottom cylindrical are provided with piston (10,12), the cylindrical and the outer casing inner wall liquid sealing of piston (10,12), and piston (10,12) slides up and down in overcoat (14); Lower end piston (10) is provided with only to the enterprising check valve that does not go out downwards (7), at least be provided with a radially oil guiding hole (6) on the axis (2) between the two-piston (10,12), make the oil mass and the oil pressure balance of the secondary oil cabinet (16) between the outer two-piston of main oil cabinet (5) and axis (2); Piston (12) double as limits the limit coil of axis (2) upward position.

2, vehicle shock absorber according to claim 1 is characterized in that, described main oil cabinet (5) is provided with the filling passage that connects to screw rod (1) upper end, and its exit is provided with the oiling plug.

3, vehicle shock absorber according to claim 1 and 2 is characterized in that, is provided with recoil spring (9) at the inner bottom part of overcoat (14) bottom end cover (8); Be provided with buffering ring (13) in the upper end of limit coil (12).

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