CN205991129U - Damp adjustable damping unit - Google Patents

Abstract

The utility model discloses a kind of damp adjustable damping unit, including hydraulic damper and damping adjustment device；Hydraulic damper includes cylinder barrel, piston rod and is arranged at the piston assembly in cylinder barrel；Damping adjustment device is to be connected with hydraulic damper, and for providing the pressure oil adjusting itself gap length and inner wall of cylinder between to piston assembly.Damping unit of the present utility model, there is provided pressure oil by arranging damping adjustment device for hydraulic damper, in order to adjust the gap length between the piston assembly in hydraulic damper and inner wall of cylinder, aperture size so as to damping adjusting passage, and then the damping force of antivibrator is also changed, reach the purpose of damping adjusting.

Description

Damp adjustable damping unit

Technical field

This utility model belongs to damper technique field, and specifically, this utility model is related to a kind of adjustable resistance of damping Buddhist nun's device.

Background technology

Currently for the development of antivibrator, have been achieved with certain achievement, antivibrator plays not in our lives Hold the effect despised.Antivibrator can be divided into spring-damper, hydraulic damper, pulse damper, rotary damper, wind antivibrator And viscous damper.Wherein spring-damper can not energy absorption and effective dissipation energy well, and spring repeatedly stretches Contracting is it is easy to produce plastic deformation.Hydraulic damper effectively can not control to the vibration of low-frequency high-amplitude or frequency low-amplitude.Arteries and veins Rushing antivibrator is a kind of hydraulic container, and due to the restriction of material, manufacturing technology and practical application, its working range extremely has Limit.Rotary damper substantially can only apply to little class part of renovating and rotate, and its temperature influence is more obvious.Windage Buddhist nun Device substantially can only apply on skyscraper at present.Although being stained with stagnant antivibrator at present with relatively wide, it is stained with stagnant antivibrator phase Manufacturing technology is required higher.For these traditional antivibrators, damping force can not automatically adjust it is impossible to efficient work. Therefore, playing a role for antivibrator energy high-efficiency environment friendly, needs research one kind self regulation can be hindered according to different situations The On A Retrofitted Damper of Buddhist nun's power.

Utility model content

This utility model is intended at least solve one of technical problem present in prior art.For this reason, this utility model carries It is capable of the adjustable damping unit of damping force for one kind.

To achieve these goals, the technical scheme that this utility model is taken is：Damp adjustable damping unit, including：

Hydraulic damper, it includes cylinder barrel and the piston assembly being arranged in cylinder barrel；And

Damping adjustment device, it is connected with hydraulic damper, and adjusts itself and inner wall of cylinder for providing to piston assembly Between gap length pressure oil.

Described hydraulic damper also includes the piston rod being connected with described piston assembly, described damping adjustment device and piston Bar connects, and the pressure oil that damping adjustment device provides flows in piston assembly through piston rod.

It is the first piston body being slidably connected that described piston assembly is included with described piston rod, first piston body at least provided with Two, have in piston rod and allow pressure oil to enter and be located at the pressure regulating cavity between all first piston bodies, enter pressure and adjust Pressure oil in section chamber promotes first piston body towards the outer side shifting of piston rod.

It is provided with the reset being connected and for making first piston body return with described first piston body in described pressure regulating cavity Element.

Described hydraulic damper also includes the auxiliary piston being connected with described piston assembly.

Described damping adjustment device is included the pressure-regulating valve being connected with described hydraulic damper and is connected with pressure-regulating valve The drive mechanism connecing.

Described pressure-regulating valve includes valve body, the valve rod being inserted in valve body and is movably arranged in valve body and and valve The valve element that bar connects, described drive mechanism is connected with valve rod and makes it do linear reciprocating motion in valve body for providing to valve rod Required driving force, valve body has oil-in and oil-out, and valve element is located between oil-in and oil-out, described hydraulic damper It is connected with the oil-out of valve body.

There is in described valve body the first valve pocket being separated by described valve element and the second valve pocket, the first valve pocket and described oil-feed Mouth connection, the second valve pocket is connected with described oil-out, and valve element has for connecting the first valve pocket and the second valve pocket and circumferentially dividing Multiple oil ducts of cloth, the length of each oil duct is different, and at least one oil duct is connected with the first valve pocket and the second valve pocket simultaneously.

Described valve body has multiple overfalls, and each overfall is connected with an overflow valve respectively, and each overflow valve Opening pressure is different.

The adjustable damping unit of described damping also includes signal pickup assembly.

Damping unit of the present utility model, provides pressure oil by arranging damping adjustment device for hydraulic damper, in order to Adjust gap length between piston assembly and the inner wall of cylinder in hydraulic damper such that it is able to the aperture of damping adjusting passage Size, and then the damping force of antivibrator is also changed, reach the purpose of damping adjusting.

Brief description

This specification includes the following drawings, and shown content is respectively：

Fig. 1 is the structural representation of this utility model damping unit；

Fig. 2 is the structural representation of hydraulic damper；

Fig. 3 is the longitudinal section of hydraulic damper；

Fig. 4 is another longitudinal section of hydraulic damper；

Fig. 5 is the cross-sectional view of hydraulic damper；

Fig. 6 is the internal structure schematic diagram of hydraulic damper；

Fig. 7 is the sectional view of piston rod and piston assembly；

Fig. 8 is the sectional view of reset element and piston assembly；

Fig. 9 is the structural representation of damping adjustment device；

Figure 10 is adjusting rod and valve rod, the installation diagram of valve element；

Figure 11 is the side view of pressure-regulating valve internal structure；

Figure 12 is the sectional view that pressure-regulating valve is in when providing one-level oil pressure；

Figure 13 is the sectional view that pressure-regulating valve is in when providing two grades of oil pressure；

Figure 14 is the sectional view that pressure-regulating valve is in when providing three-level oil pressure；

Figure 15 is the structural representation of signal pickup assembly；

Figure 16 is the partial structural diagram of signal pickup assembly；

Figure 17 is enlarged drawing at A in Figure 16；

Figure 18 is the structural representation of the first ratchet gear；

Figure 19 is the structural representation of the second ratchet gear；

In figure is labeled as：

1st, oil pipe；2nd, hydraulic damper；21st, reset element；22nd, piston rod；221st, the piston body of rod；222nd, connecting seat； 223rd, pressure regulating cavity；224th, oil duct；23rd, piston assembly；231st, first piston body；232nd, limited block；233rd, connecting rod；234、 Piston only；235th, first side；236th, second side；24th, auxiliary piston；241st, second piston body；25th, cylinder barrel；26th, interior Chamber；27th, oil-in；3rd, damping adjustment device；31st, adjusting rod；32nd, nut；33rd, motor；34th, valve body；35th, valve rod；36th, valve Core；37th, the first oil duct；38th, the second oil duct；39th, the 3rd oil duct；310th, the first overfall；311st, the second overfall；312nd, the 3rd Overfall；313rd, oil-in；314th, oil-out；315th, the first valve pocket；316th, the second valve pocket；317th, the first overflow valve；318th, Two overflow valves；319th, the 3rd overflow valve；320th, closeouts；4th, signal pickup assembly；41st, support；42nd, elevating lever；43rd, first Axle；44th, the second axle；45th, the first signal gear；46th, secondary signal gear；47th, the first ratchet gear；471st, the first external toothing； 472nd, the first inward turning tooth；48th, the second ratchet gear；481st, the second external toothing；482nd, the second inward turning tooth；49th, sensor.

Specific embodiment

Below against accompanying drawing, by the description to embodiment, specific embodiment of the present utility model is made detailed further Thin explanation it is therefore an objective to help those skilled in the art design of the present utility model, technical scheme are had more complete, accurately and Deep understanding, and contribute to its enforcement.

As shown in figure 1, this utility model provides a kind of adjustable damping unit of damping, including hydraulic damper and damping Adjusting means；Hydraulic damper includes cylinder barrel 25, piston rod 22 and the piston assembly 23 being arranged in cylinder barrel 25；Damping adjusts dress Putting is to be connected with hydraulic damper, and for providing the pressure adjusting itself gap length and cylinder barrel 25 inwall between to piston assembly 23 Power oil.

Specifically, as shown in Fig. 2 the cylinder barrel 25 of hydraulic damper is the cylindrical tube of inner hollow, in cylinder barrel 25 Portion's hollow space is the inner chamber 26 of storage fluid.Piston assembly 23 is arranged in the inner chamber 26 of cylinder barrel 25, the lower end of piston rod 22 It is fixedly connected with piston assembly 23 in insertion cylinder barrel 25, the upper end of piston rod 22 stretches out in outside cylinder barrel 25.Piston rod 22 is inside The structure of hollow, damping adjustment device is connected with piston rod 22, and the pressure oil that damping adjustment device provides flows through piston rod 22 To piston assembly 23.

As shown in figures 3 and 8, piston assembly 23 is included with piston rod 22 is the first piston body 231 being slidably connected, first Piston body 231, at least provided with two, has in piston rod 22 and allows pressure oil to enter and be located between all first piston bodies 231 Pressure regulating cavity 223 and connect with pressure regulating cavity 223 and by the pressure oil being provided by damping adjustment device guide to pressure adjust Oil duct 224 in section chamber 223, enters the pressure oil in pressure regulating cavity 223 and promotes first piston body 231 towards piston rod 22 Outer side shifting, namely first piston body 231 towards at the inwall of cylinder barrel 25 mobile such that it is able to reduce and cylinder barrel 25 inside between Gap.Between the internal face of the outside wall surface of piston assembly 23 and cylinder barrel 25, there is certain gap, this gap forms and allows fluid The damp channel passing through, damp channel enables the upper chamber of inner chamber 26 to connect with lower chambers.Due to piston assembly 23 and cylinder barrel Gap between 25 inwalls can be adjusted, then the aperture of damp channel is sized to adjust, such that it is able to change hydraulic damper Produced damping force size.

As preferred, as shown in Figure 7 and Figure 8, hydraulic damper also includes being arranged in pressure regulating cavity 223 and being used for Make the reset element 21 of first piston body 231 return, reset element 21 is connected with first piston body 231 and for first piston Body 231 applies to make it be directed away from the driving force of the direction movement of cylinder barrel 25 inwall.Thus the pressure in pressure regulating cavity 223 When oil reduces, reset element 21 pulls first piston body 231 to move towards the center of cylinder barrel 25, can make first piston body 231 Gap and cylinder barrel 25 inwall between increases.

As preferred, as shown in Figure 6 and Figure 7, piston rod 22 includes the piston body of rod 221 and the end with the piston body of rod 221 The connecting seat 222 that portion is fixedly connected, the first piston body 231 of piston assembly 23 and connecting seat 222 are to be slidably connected, and first The moving direction of piston body 231 is perpendicular with the axial direction of cylinder barrel 25 and piston rod 22.Pressure regulating cavity 223 is arranged at connecting seat 222 inside, pressure regulating cavity 223 is located at the inside of cylinder barrel 25.The piston body of rod 221 is the long straight-bar being inserted in cylinder barrel 25, One end of the piston body of rod 221 is fixedly connected with connecting seat 222, and the other end extend out to the outside of cylinder barrel 25.The piston body of rod 221 is one End opening and the round bar of inner hollow, the opening of the piston body of rod 221 is fixedly connected with connecting seat 222, the piston body of rod 221 interior Chamber is the oil duct 224 connecting with the pressure regulating cavity 223 in connecting seat 222, and the side wall of the extension of the piston body of rod 221 is provided with One oil-in being connected with damping adjustment device 27, this oil-in is simultaneously connected with oil duct 224, the pressure that damping adjustment device provides Power oil flows in pressure regulating cavity 223 through the oil-in 27 on the piston body of rod 221, oil duct 224.

As shown in Figure 7 and Figure 8, first piston body 231 includes limited block 232, the setting being arranged in pressure regulating cavity 223 Piston only 234 outside in connecting seat 222 and the connecting rod 233 being connected with limited block 232 and piston only 234, are connected The length direction of bar 233 and the axis perpendicular of piston rod 22 and cylinder barrel 25.Connecting rod 233 is inserted on connecting seat 222, connects Be fixedly connected in one end insertion pressure regulating cavity 223 of bar 233 and with limited block 232, the other end be outer with connecting seat 222 and with Piston only 234 is fixedly connected.Two first piston bodies 231 of piston assembly 23 are line edges centered on the axis of piston rod 22 Circumference is uniformly distributed, and that is, two first piston bodies 231 are to be symmetrical arranged, and reset element 21 is and two limited blocks 232 between, and Reset element 21 is connected with two limited blocks 232, reset element 21 be used for two first piston bodies 231 are applied making two spacing The active force that block 232 moves towards.Reset element 21 preferably employs horizontal helical spring between two limited blocks 232.

As preferred, as shown in Figures 3 to 5, the inner chamber of cylinder barrel 25 is the rectangular cavity in cross section, i.e. cylinder barrel 25 Inner chamber is a long rectangular opening, and the outer surface of piston only 234 has two first sides 235 and a second side 236, the One side 235 and second side 236 are the plane paralleled with the axis of cylinder barrel 25 and piston rod 22, and second side 236 is located at Between two first sides 235 and first perpendicular with two, the moving direction of first piston body 231 and second side 236 phase Vertically.Cylinder barrel 25 has four internal faces paralleled with its axis, and four internal faces are two-by-two relatively.The two of piston only 234 Individual first side 235 is parallel with two relative internal faces of cylinder barrel 25 and contacts respectively, the second of two piston onlies 234 It is respectively provided with gap between side 236 and two other relative internal face of cylinder barrel 25, form damp channel, thus cylinder barrel 25 Interior fluid is only capable of the inwall of two second sides 236 from piston assembly 23 and cylinder barrel 25 when flowing between upper and lower chamber Between gap in pass through, between the remaining surface in piston assembly 23 circumference and the inwall of cylinder barrel 25 formed sealing, connecting seat Breach between 222 two piston onlies 234 of closing, it is to avoid fluid is from two piston onlies 234 and two second piston bodies 241 Between breach in pass through.

As shown in Figures 2 to 4, hydraulic damper also includes being arranged at cylinder barrel 25 inside and being fixedly connected with piston assembly 23 Auxiliary piston 24, auxiliary piston 24 is simultaneously located between piston assembly 23 and the diapire of cylinder barrel 25.Auxiliary piston 24 mainly by The second piston body 241 being fixedly connected with first piston body 231 is constituted, the generally rectangular shaped structure of second piston body 241.Second lives Also there is between the outer surface of cock body 241 and cylinder barrel 25 inwall gap, form damp channel, second piston body 241 is lived with first Cock body 231 synchronizing moving.

As shown in figure 1, damping adjustment device includes the pressure-regulating valve being connected with hydraulic damper and and pressure-regulating valve The drive mechanism connecting, pressure-regulating valve is connected with the oil-in 27 on piston rod 22 by oil pipe 1.As shown in Figure 9 and Figure 10, Pressure-regulating valve include valve body 34, the valve rod 35 being inserted in valve body 34 and be movably arranged in valve body 34 and with valve rod 35 The valve element 36 connecting, drive mechanism is connected with valve rod 35 and makes it do reciprocating linear fortune in valve body 34 for providing to valve rod 35 Dynamic required driving force, valve body 34 has an oil-in and an oil-out 314, and oil-in is arranged at one end of valve body 34, Oil-out 314 is arranged at the other end of valve body 34, and valve element 36 is located between oil-in and oil-out 314.One end of oil pipe 1 and valve The oil-out 314 of body 34 connects, and the other end is connected with the oil-in 27 on piston rod 22.Oil-in on valve body 34 passes through oil pipe It is connected with the oil pump of hydraulic system, oil pump provides pressure oil for pressure-regulating valve.

As shown in Figure 10 and Figure 11, valve body 34 is the structure of inner hollow, has the being separated by valve element 36 inside it One valve pocket 315 and the second valve pocket 316, the first valve pocket 315 connects with oil-in and both are in the side of valve element 36, the second valve pocket 316 are connected with oil-out 314 and both are in the opposite side of valve element 36.Valve element 36 has for connecting the first valve pocket 315 and Two valve pockets 316 and circumferentially distributed multiple oil ducts, the length of each oil duct is different, and at least one oil duct and the first valve pocket 315 connect with the second valve pocket 316 simultaneously.Valve body 34 has multiple overfall, overfall and oil-feeds connecting with the first valve pocket 315 Mouth is in the same side of valve element 36, and the quantity of overfall is equal with the quantity of the oil duct on valve element 36, each overfall respectively with One overflow valve connects, and overflow valve is used for the pressure of control pressure oil, and the Opening pressure of each overflow valve is different, and overflow valve is simultaneously It is connected with the fuel tank of hydraulic system.

As shown in Figures 9 to 11, valve element 36 is cylindrical structural, and the first valve pocket 315 and the second valve pocket 316 are cylinder Cavity, the diameter of the second valve pocket 316 more than the diameter of the first valve pocket 315 and both are coaxial, the diameter of the first valve pocket 315 and valve The overall diameter of core 36 is equal in magnitude.The first oil duct 37 circumferentially setting gradually, the second oil duct 38 and the 3rd are had on valve element 36 Oil duct 39, the length direction of the first oil duct 37, the second oil duct 38 and the 3rd oil duct 39 is paralleled with the axis of valve element 36.First oil Road 37 is to start to extend to the other end of valve element 36 from the end face of valve element 36, thus the first oil duct 37 can make the first valve pocket 315 states connecting with the second valve pocket 316 holding.First oil duct 37, the second oil duct 38 and the 3rd oil duct 39 are in valve element 36 On periphery setting and be all that the end face positioned at the first valve pocket 315 starts to axially extend from valve element 36, the first oil duct 37 Length maximum, the length of the second oil duct 38 is taken second place, and the length of the 3rd oil duct 39 is the shortest.First oil duct 37, the second oil duct 38 and 3rd oil duct 39 simultaneously forms opening on the periphery of valve element 36, at valve element 36 is axially towards oil-out 314 mobile until After so that the second oil duct 38 is entered in the second valve pocket 316, the first valve pocket 315 and the second valve pocket 316 pass through the first oil duct 37 and second Oil duct 38 connects, and the pressure oil in the first valve pocket 315 enters in the second valve pocket 316 through the first oil duct 37 and the second oil duct 38；When After valve element 36 continues axially towards moving at oil-out 314 until making the 3rd oil duct 39 enter in the second valve pocket 316, the first valve The first oil duct 37 is passed through with the second valve pocket 316 in chamber 315, the second oil duct 38 connects with the 3rd oil duct 39, in the first valve pocket 315 Pressure oil enters in the second valve pocket 316 through the first oil duct 37, the second oil duct 38 and the 3rd oil duct 39.

As shown in figs. 9 and 12, on the side wall of valve body 34 along be axially arranged with three overfalls, the respectively first overfall 310th, the second overfall 311 and the 3rd overfall 312, the second overfall 311 is located at the first overfall 310 and the 3rd overfall Between 312, and the 3rd overfall 312 is located between the second overfall 311 and valve element 36.First overfall 310 and the first overflow Valve 317 connects, and the second overfall 311 is connected with the second overflow valve 318, and the 3rd overfall 312 is connected with the 3rd overflow valve 319, Opening pressure P3 of the 3rd overflow valve 319 is maximum, and Opening pressure P2 of the second overflow valve 318 is less than P3, the first overflow valve 317 Opening pressure P1 be minimum, less than P2 and P3.As shown in Figure 10, as preferred, valve rod 35 is provided with one and is used for controlling The closeouts 320 of the opening and closing of the first overfall 310 and the second overfall 311, this closeouts 320 and valve element 36 are connected with valve rod 35 Integral, when mobile at valve element 36 is towards oil-out 314, closeouts 320 can be successively by the first overfall 310 and the second overflow Mouth 311 closing.

As shown in figure 12, pressure-regulating valve is in the working condition providing one-level oil pressure, and now closeouts 320 are in valve body Between 34 end and the first overfall 310, valve element 36 is in apart from oil-out 314 far from because the first overflow The Opening pressure of valve 317 is minimum, larger and more than the first overflow valve 317 when entering the pressure oil oil pressure in the first valve pocket 315 During Opening pressure P1, the first overflow valve 317 works, and now only connects the first valve pocket 315 He by the first oil duct 37 on valve element 36 Second valve pocket 316, pressure oil flows to that piston rod 22 medium velocity is slower, and when stablizing, pressure oil simultaneously keeps P1 pressure.

As shown in figure 13, pressure-regulating valve is in the working condition providing two grades of oil pressure, need to first adjust in this working condition The position of section valve element 36 makes the first oil duct 37 all connect with the first valve pocket 315 and the second valve pocket 316 with the second oil duct 38, Er Qiefeng First overfall 310 is closed by blocking piece 320；In the same manner, larger and more than second when entering the pressure oil oil pressure in the first valve pocket 315 During Opening pressure P2 of overflow valve 318, the second overflow valve 318 works, and now, valve element 36 has two oil duct conductings, pressure oil Flow velocity is moderate, pressure oil keep P2 pressure when stablizing, and so that the gap between piston assembly 23 and cylinder barrel 25 inwall is reduced.

As shown in figure 14, pressure-regulating valve is in the working condition providing three-level oil pressure, need to first adjust in this working condition Section valve element 36 position make the first oil duct 37, the second oil duct 38 and the 3rd oil duct 39 all with the first valve pocket 315 and the second valve pocket 316 Connection, and the first overfall 310 and the second overfall 311 are closed by closeouts 320；During three-level oil pressure, when entering the first valve Pressure oil oil pressure in chamber 315 is larger and during Opening pressure P3 more than the 3rd overflow valve 319, the 3rd overflow valve 319 works, this When valve element 36 on three oil ducts all turn on, pressure oil flow rate is very fast, pressure oil keep P3 pressure when stablizing, and makes piston assembly Gap between 23 and cylinder barrel 25 inwall reduces further.

The effect of pressure-regulating valve is exactly to provide the pressure oil of different pressures to hydraulic damper according to different situations, adjusts Gap between piston assembly 23 and cylinder barrel 25 inwall.Two first piston bodies 231 of piston assembly 23 can be in the effect of oil pressure Lower to both sides movement, in the presence of back-moving spring, the pulling force of back-moving spring and oil pressure pressure can reach a balance.For pressure Power is adjusted in chamber 223 has tri- kinds of different oil pressure of P1, P2, P3, and first piston body 231 has three different positions, piston Assembly 23 just has corresponding three different gap with cylinder barrel 25 inwall.Gap is different, and damping force during work also can be different, resistance Buddhist nun's effect is different.

The pressure-regulating valve of said structure, during work, when changing grade to higher pressure rank, the oil duct quantity simultaneously turning on Increase, now need more fluid in piston rod 22 inner chamber, this structure can be faster oil-filled, that is, antivibrator can be made to respond Faster.When high pressure changes to low pressure, the oil duct quantity of conducting reduces, and the fluid oil return in piston rod 22 is slightly slow, reduces overflow valve Working strength, makes overflow valve work more stable.

As preferred, as shown in figure 9, drive mechanism includes adjusting rod 31 and the set that motor 33 is connected with valve rod 35 Constitute the nut 32 of worm drive on adjusting rod 31 and with adjusting rod 31, motor 33 is connected with nut 32 and for spiral shell Female 32 provide the driving force making it rotate.One end of valve rod 35 is located inside valve body 34, and the other end extend out to valve body 34 Outside and with adjusting rod 31 be fixedly and coaxially connected.Adjusting rod 31 be screw rod, nut 32 be located at valve body 34 one end and with respect to Valve body 34 is only capable of rotating, and nut 32 constitutes worm drive with adjusting rod 31, and has auto-lock function, is conducive to pressure to adjust The pressurize of section valve.The nut 32 rotating can drive adjusting rod 31 to do linear reciprocating motion, adjusting rod 31 and then drive valve Bar 35 and valve element 36 do linear reciprocating motion inside valve body 34.

As shown in fig. 10 and fig. 12, closeouts 320 are except for controlling the first overfall 310 and the second overfall 311 Opening and closing is outer, is additionally operable to valve rod 35 is played guide effect, and closeouts 320 are protruded towards the outside of valve rod 35, accordingly in valve body 34 Internal face on be provided with the gathering sill allowing closeouts 320 to embed, the length direction of gathering sill paralleled with the axis of valve body 34, And gathering sill is on same straight line with three overfalls on valve body 34 and extends to corresponding first overfall 310 and second and overflows At the position of head piece 311.Closeouts 320 limit adjusting rod 31 and the degree of freedom of valve rod 35, only make adjusting rod 31 and valve rod 35 Move along a straight line.

As shown in figure 9, motor 33 is connected with nut 32 by drive mechanism, drive mechanism is gear mechanism, driver The power intake of structure is fixedly connected with the main shaft of motor 33, and clutch end is fixedly connected with nut 32, realizes power Transmission.

When damping unit of the present utility model is used for playing damping effect in vehicle suspension system, as shown in figure 1, this practicality New damping unit can also include signal pickup assembly.As shown in Figure 14 and Figure 15, this signal pickup assembly includes vertically The elevating lever 42 of setting, the first axle 43 being rotatably arranged on support 41 and the second axle 44, it is arranged in first axle 43 First ratchet gear 47 and the first signal gear 45, the second ratchet gear 48 being arranged on the second axle 44 and secondary signal gear 46 and the sensor that is arranged on support 41 and matches with the first signal gear 45 and secondary signal gear 46 respectively.First Axle 43 and the second axle 44 are parallel, the axis perpendicular of the length direction of elevating lever 42 and first axle 43 and the second axle 44, lifting Bar 42 has the tooth bar engaging with the first ratchet gear 47, and the second ratchet gear 48 is engaged with the first ratchet gear 47, the second spine Wheel gear 48 lower section positioned at the first ratchet gear 47.

Because elevating lever 42 moves up and down, therefore the first ratchet gear 47 and the second ratchet gear 48 are arranged to Only unidirectional driving force is produced to first axle 43 and the second axle 44.When elevating lever 42 declines, the rack drives on elevating lever 42 the One ratchet gear 47 rotates clockwise, and the first ratchet gear 47 drives the first signal gear 45 synchronous axial system by first axle 43, The sensor matching with the first signal gear 45 detects signal, and when the first ratchet gear 47 rotates and makes first axle 43 During synchronous rotary, the second ratchet gear 48 can not make the second axle 44 rotate；When elevating lever 42 rises, drive the second ratchet gear 48 Rotate counterclockwise, but first axle 43 do not rotate, the second ratchet gear 48 drives the first ratchet gear 47 of engagement to rotate clockwise, Second ratchet gear 48 drives secondary signal gear 46 synchronous axial system by the second axle 44, matches with secondary signal gear 46 Sensor detects signal.

The structure of the first ratchet gear 47 and the second ratchet gear 48 has various ways, can be analogous to prior art Internal messing ratchet, it would however also be possible to employ other structures.In the present embodiment, the structure of the first ratchet gear 47 is as shown in figure 17, the One ratchet gear 47 includes the first external toothing 471 engaging with tooth bar and the core being in the first external toothing 471 and with The first inward turning tooth 472 that one signal gear 45 is fixedly and coaxially connected, the first inward turning tooth 472 diametrically has certain scaling elasticity, The inner side of the first external toothing 471 is the spine circle being mutually engaged with the first inward turning tooth 472；Spine circle and the first inward turning tooth 472 press setting Direction is engaged, and the first external toothing 471 can only drive the first inward turning tooth 472 single direction rotation, therefore can only set to first axle 43 transmission Determine the torque in direction.As shown in figure 18, the second ratchet gear 48 is identical with the structure of the first ratchet gear 47, the second ratchet gear 48 include the second external toothing 481 engaging with tooth bar and the core being in the second external toothing 481 and with secondary signal gear 46 the second inward turning teeth 482 being fixedly and coaxially connected, the second inward turning tooth 482 diametrically has certain scaling elasticity, the second external toothing 481 inner side is the spine circle being mutually engaged with the second inward turning tooth 482；Spine circle and the second inward turning tooth 482 press the direction occlusion setting, the Two external toothings 481 can only drive the second inward turning tooth 482 single direction rotation, therefore can only transmit turning of direction initialization to the second axle 44 Square.

Signal pickup assembly also includes the jacking spring (not shown) being vertically arranged at elevating lever 42 lower end, jacking The effect of spring is that jacking spring is preferably cylindrical screw for providing, to elevating lever 42, the elastic acting force moving it up Spring.When signal pickup assembly is attached to vehicle suspension system, the upper end of elevating lever 42 is connected with the spring carried mass of vehicle, jacking Spring is to be clipped between elevating lever 42 and the nonspring carried mass of vehicle, and support 41 is arranged on the nonspring carried mass of vehicle.Signal The motor 33 of the sensor of harvester and drive mechanism is connected with car body controller, and sensor is by the signal transmission gathering extremely Car body controller, car body controller judges the vertical vibration state of vehicle body and the transport condition of vehicle, and car body controller simultaneously sends Signal, to electric machine controller, controls the working order of motor 33, and then the working condition of control pressure regulating valve, so that hydraulic pressure is hindered The damping force of Buddhist nun's device is accordingly adjusted according to different situations, makes suspension system have good work under various operating modes and road conditions Make condition.

Above in association with accompanying drawing, this utility model is exemplarily described.Obviously, this utility model implements not Limited by aforesaid way.As long as employing the various unsubstantialities that method design of the present utility model and technical scheme are carried out Improvement；Or not improved, above-mentioned design of the present utility model and technical scheme are directly applied to other occasions, all at this Within the protection domain of utility model.

Claims (8)

1. damp adjustable damping unit it is characterised in that including：

Hydraulic damper, it includes cylinder barrel and the piston assembly being arranged in cylinder barrel；And

Damping adjustment device, it is connected with hydraulic damper, and adjusts it and inner wall of cylinder between for providing to piston assembly The pressure oil of gap length.

2. according to claim 1 damping adjustable damping unit it is characterised in that described hydraulic damper also include with The piston rod that described piston assembly connects, described damping adjustment device is connected with piston rod, the pressure that damping adjustment device provides Oil flows in piston assembly through piston rod.

3. according to claim 2 damping adjustable damping unit it is characterised in that described piston assembly include with described Piston rod is the first piston body being slidably connected, and first piston body, at least provided with two, has in piston rod and allows pressure oil to enter And the pressure regulating cavity between all first piston bodies, enter the pressure oil promotion first piston body court in pressure regulating cavity The side shifting to outside piston rod.

4. according to claim 3 damping adjustable damping unit it is characterised in that be provided with described pressure regulating cavity with Described first piston body connects and for making the reset element of first piston body return.

5. according to claim 4 damping adjustable damping unit it is characterised in that described hydraulic damper also include with The auxiliary piston that described piston assembly connects.

6. according to claim 5 damping adjustable damping unit it is characterised in that described damping adjustment device include with Pressure-regulating valve and the drive mechanism being connected with pressure-regulating valve that described hydraulic damper connects.

7. the adjustable damping unit of damping according to claim 6 is it is characterised in that described pressure-regulating valve includes valve Body, the valve rod being inserted in valve body and the valve element being movably arranged in valve body and being connected with valve rod, described drive mechanism and Valve rod connects and makes it do the driving force needed for linear reciprocating motion in valve body for providing to valve rod, and valve body has oil-in And oil-out, positioned between oil-in and oil-out, described hydraulic damper is connected valve element with the oil-out of valve body.

8. the adjustable damping unit of damping according to claim 7 is it is characterised in that have by described valve in described valve body The first valve pocket and the second valve pocket that core separates, the first valve pocket is connected with described oil-in, and the second valve pocket is with described oil-out even Logical, valve element has for connecting the first valve pocket and the second valve pocket and circumferentially distributed multiple oil ducts, and the length of each oil duct is not With, and at least one oil duct connected with the first valve pocket and the second valve pocket simultaneously.