CN101886683B - Adjustable hydraulic buffer - Google Patents
Adjustable hydraulic buffer Download PDFInfo
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- CN101886683B CN101886683B CN2010101154761A CN201010115476A CN101886683B CN 101886683 B CN101886683 B CN 101886683B CN 2010101154761 A CN2010101154761 A CN 2010101154761A CN 201010115476 A CN201010115476 A CN 201010115476A CN 101886683 B CN101886683 B CN 101886683B
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Abstract
The invention discloses an adjustable hydraulic buffer which comprises an outer cylinder body, an inner cylinder body rotatablely arranged in the outer cylinder body, and a piston positioned at the front end of the inner cylinder body, wherein the inner cylinder body is also internally provided with an offsetting spring; an oil storage cavity is formed by the piston and the inner cylinder body; an oil return cavity is formed by the rest cavity in the outer cylinder body; the oil storage cavity is connected with the oil return cavity by a throttle oil way related to the rotation angle of the inner cylinder body; the inner cylinder body adopts a split-type structure, and comprises a tube-shaped inner cylinder sleeve and a sealing cover embedded at the rear end of the inner cylinder sleeve; the inner side end surface of the sealing cover is provided with a ring-shaped expanding oil groove arranged together with the sealing cover in a coaxial way; and the matching part on the sealing cover matched with the inner cylinder sleeve takes on a cylinder shape. The inner cylinder sleeve adopts the split-type structure, the processing is conveniently carried out, and the processing accuracy is improved; the sealing cover is provided with the expanding oil groove, so that the sealing cover can be avoided loosening and falling off since the inner cylinder sleeve is expended and deformed; and the damping can be conveniently adjusted, so that the adjustable hydraulic buffer is applicable to buffering and avoiding shock for a mechanism with impact force.
Description
Technical field
The present invention relates to a kind of hydraulic damping device, specifically relate to a kind of hydraulic bjuffer of can regulate damping size.
Background technique
The general structure that adopts inside and outside two cylinder bodies that are set-located of existing hydraulic bjuffer, piston is housed on inner cylinder body, be filled with fluid oil in its cylinder body, between interior outer cylinder body, be provided with the throttling oil circuit that can change liquid flow section size by the rotation inner cylinder body, when the piston rod pressurized on the piston, the fluid oil that piston promotes in the inner cylinder body flows out in the oil return cavity that enters in the outer cylinder body from the throttling oil circuit, rely on the damping function of throttling oil circuit liquid towards oil, make the stroke of piston rod be obstructed and underspeed, thereby play buffer function.By rotating inner cylinder body the liquid flow section of throttling oil circuit is changed, can change the damping size of liquid towards oil, thereby regulate the cushioning effect of buffer.Because the madial wall of inner cylinder body need cooperate with piston, thereby it is very high to dimension precision requirement, need just can install and use through grinding, but its inner cylinder body of existing buffer is a monolithic construction, be that front end is open-minded, and the rear end is sealed, thereby causes the interior sidewall surface processing difficulties of inner cylinder body, its machining accuracy to be difficult to guarantee.A kind of disclosed on Chinese patent literature " hydraulic bjuffer ", its notification number is CN2121570U, form by outer cylinder body, inner cylinder body, piston, sealing and fixing device, adopt the recovery device of spring as piston, adopt the pilot valve and the interior exocoel of throttle orifice, fluid groove, eccentric grove and piston head to constitute the fluid loop system, because the inner cylinder body of this buffer adopts monolithic construction equally, thereby can't avoid the problem of inner cylinder body processing difficulties.At present, also the someone attempts changing inner cylinder body into split-type structural, concrete structure is referring to accompanying drawing 11, the inner cylinder body 2 that is rotationally connected promptly is set in outer cylinder body 1, and inner cylinder body 2 is divided into the capping 22 of inner cylinder liner 21 and rear end, for ease of making and assembling, capping 22 is the ends that are embedded in inner cylinder liner 21 by plunging.Because inner cylinder liner can bear certain oil pressure when buffer is worked, thereby make inner cylinder liner produce the dilatating and deformable of trace, when if the piston rod of buffer is subjected to bigger impact force, inner cylinder liner bore moment, oil pressure can be very high, thereby make inner cylinder liner produce bigger dilatating and deformable, and then between inner cylinder liner and capping, produce bigger slit and cause high pressure oil to enter and leakage of oil, enter the gap that high pressure oil in the slit further supports big inner cylinder liner and capping, finally cause capping adjusting loosening and whole buffer to be lost efficacy.
Summary of the invention
The objective of the invention is the loosening easily problem of capping, provide a kind of and adopt split type inner cylinder body, also can avoid because of the loosening adjustable hydraulic buffer that lost efficacy of regulating between capping and the inner cylinder liner in order to solve existing adjustable hydraulic buffer existing integrated type inner cylinder body processing difficulties and split type inner cylinder body.
To achieve these goals, the present invention is by the following technical solutions: a kind of adjustable hydraulic buffer, comprise outer cylinder body, be located at the inner cylinder body in the outer cylinder body back segment rotationally, be located at the protecgulum of outer cylinder body front end, be located at elasticity pressure accumulation body in the outer cylinder body and the piston of being located at the inner cylinder body front end, in outer cylinder body, constitute an oil storage cavity by piston and inner cylinder body, remaining cavity then constitutes the oil return cavity in the outer cylinder body, in oil storage cavity and oil return cavity, be filled with fluid oil, between inner cylinder body and outer cylinder body, be provided with the throttling oil circuit that is communicated with oil storage cavity and oil return cavity respectively, in inner cylinder body, also be provided with the Returnning spring that is used for piston reset, described inner cylinder body adopts and divides body structure, comprise the inner cylinder liner of tubulose and the capping that is embedded in the inner cylinder liner rear end, be positioned in capping on the end face of inner cylinder liner one side and be provided with the annular expansion oil groove coaxial with capping, the mating part that matches with inner cylinder liner in the capping is cylindrical, and the liquid flow section size of throttling oil circuit is associated with the rotation angle of inner cylinder body.Inner cylinder body of the present invention is made up of the inner cylinder liner and the capping of tubulose, and the inner cylinder liner two ends are open-minded, thereby is convenient to the machining of its madial wall, helps guaranteeing the machining accuracy of madial wall, and then the precision that cooperates between raising and the piston.Simultaneously, for dilatating and deformable after avoiding the inner cylinder liner pressurized makes capping loosening, the expansion oil groove is set on the end face of capping, make the mating part that matches with inner cylinder liner in the capping cylindrical, like this, the present invention is when work, and its inner cylinder liner is subjected to the effect of high pressure oil and expands outwardly, and the high pressure oil in the expansion oil groove of capping produces outside expansion pressure to the madial wall of cylindrical shape mating part equally, thereby the cylindrical shape mating part is expanded outwardly.In addition, capping can adopt copper material etc. to have good ductility and flexible material is made, under identical oil pressure, its dilatating and deformable is greater than the dilatating and deformable of inner cylinder liner, thereby the dilatating and deformable that can guarantee the cylindrical shape mating part of capping can be offset the dilatating and deformable of inner cylinder liner fully, and make the original matching allowance of maintenance between inner cylinder liner and the capping, to avoid the loosening of capping.In addition,, thereby have bigger resiliently deformable, bigger matching allowance can be arranged, guaranteed the reliability of cooperation between the two thereby make between capping and the inner cylinder liner with common cylindrical comparing because the mating part of capping and inner cylinder liner is cylindrical.
As preferably, the inner side surface of described outer cylinder body rear end is provided with the step of closing in, and form a positioning hole, be positioned in the described capping on the outer end face of inner cylinder liner and extended axially locating journal, between the positioning hole of locating journal and step for being rotatably assorted, the outer side surface of described locating journal is provided with the restraining groove of annular, radially is provided with the stop screw of screens in restraining groove in the position of corresponding restraining groove on the outer cylinder body.Because buffer its outer cylinder body when work is fixed, impact force suffered on the piston rod is delivered on the inner cylinder body by fluid oil, and normally being provided with clasp between inside and outside cylinder body, existing buffer carries out axial limiting, not only assembling is complicated, and reliability is low, on the inner side surface of the present invention by rear end of the cylinder block outside the step of closing in is set, thereby makes inner cylinder body in the axial direction reliable supporting and spacing can be arranged; Simultaneously, locating journal forms a kind of bearing with positioning hole and is connected, and makes to reduce the length that cooperates section between the inside and outside cylinder body, thereby makes things convenient for the manufacturing of outer cylinder body; In addition, by the screens of stop screw, guaranteeing to avoid inner cylinder body play in the axial direction, especially inside play under the inner cylinder body prerequisite free to rotate with the restraining groove of annular.
As preferably, described capping is axially arranged with small end inwardly with the oil hole of tapering, is provided with steel ball in the oil hole, the big end of oil hole backward side shaft to being extended with tapped hole, be provided with the Cock screw that presses steel ball in the tapped hole, the tapering of described oil hole is 12 °～30 °.The oil hole that the band tapering is set in capping cooperates the one-way valve structures of steel ball, makes things convenient for the filling and the replacing of fluid oil; And if the tapering of oil hole is too little, then can improves requirement, and can cause the self-locking of steel ball its dimensional accuracy, and the tapering of oil hole is excessive, Cock screw to the identical prerequisite of the active force of steel ball under, steel ball is less to the pressure of the oil hole conical surface, thereby is unfavorable for the sealing of steel ball.
As preferably, be connected with adjustment seat by the screw of being located at the axle center on the ear end face of described capping locating journal, adjustment seat is made of large and small two sections step-like cylinders, the diameter of its big section cylinder is identical with the diameter of outer cylinder body rear end, the positioning hole of segment cylinder and outer cylinder body is rotatably assorted, and is provided with the rotation inhibiting limit structure between adjustment seat and capping; Described rotation inhibiting limit structure comprises the limited impression of radially being located at capping locating journal end face, radially is located at adjustment seat segment cylinder end face and go deep into spacing muscle in the limited impression.Adjustment seat is set in capping, makes the present invention can rotate inner cylinder body easily to adjust the size of damping; And the segment cylinder that is rotatably assorted with outer cylinder body is set on the adjustment seat, and making things convenient for the location of adjustment seat when assembling, the rotation inhibiting limit structure can be avoided relatively rotating between adjustment seat and the capping, makes between the two reliably to connect.
As preferably, described throttling oil circuit comprises the throttling groove of being located at inner cylinder liner outer side surface circumferencial direction, the pairing central angle of the origin-to-destination of throttling groove is 150 °～300 °, the cross section of throttling groove is a rectangle, or it is semicircle, or it is trapezoidal, the width of throttling groove from origin-to-destination by wide to narrow linear successively decreasing, inner cylinder liner is provided with throttle orifice radially at the starting point place of throttling groove, the inner side surface of described outer cylinder body is provided with axial spout, the mutual juxtaposition of spout and throttling groove, described spout also link to each other with oil return cavity in the outer cylinder body.Spout axial on the outer cylinder body inner side surface of the present invention also is communicated with the throttling groove juxtaposition, the cross section size that is communicated with the place on the throttling groove with spout promptly constitutes the size of the liquid flow section of whole throttling oil circuit, because the width of the throttling groove that is provided with on the inner cylinder liner outer side surface is linear gradient in a circumferential direction, therefore, when rotating inner cylinder body, change with the throttling groove width at spout juxtaposition place thereupon, thereby the size of liquid flow section is changed thereupon, and then realize changing the purpose of throttling oil circuit damping size.Shape after described throttling groove flattens is trapezoidal, also can be triangle, because the width in cross section is a linear decrease, so the size of liquid flow section also is linear decrease, thereby can realize the stepless linearly adjust of damping.
As preferably, the degree of depth of described throttling groove is successively decreased from origin-to-destination is linear from deep to shallow, and the bottom surface of throttling groove joins at destination county and inner cylinder liner outer side surface slyness.The degree of depth in throttling groove cross section and width can be done linear decrease simultaneously to increase the regulation range of damping, also can carry out linear decrease to the degree of depth or width separately; In addition, also many throttling grooves can be arranged side by side axially, thereby can guarantee in certain damp adjustable range, to reduce the starting point degree of depth of throttling groove as far as possible, thereby help improving the intensity of inner cylinder liner, especially adjustable hydraulic buffers of small dimension in some, the wall thickness of inner cylinder liner is thinner, and said structure is more favourable to proof strength.
As preferably, the rear end that is connected with piston head on the piston rod of described piston is provided with the linkage section of one, and forming a shoulder with the linkage section connecting part, the center of piston head is provided with through hole and is set on the linkage section of piston rod, between the shoulder of the front-end face of piston head and piston rod, leave the slit, on linkage section and outer side surface that the central through bore of piston head cooperates, be provided with oil-return groove, the tail end of described linkage section is articulated with the spring seat of butterfly, linkage section is provided with snap ring in the outside of spring seat, one end of described Returnning spring is close to the inner side end of capping, and the other end is close to the edge of butterfly spring seat; Described snap ring is the equilateral triangle structure of sealing.Spring seat can play the screens effect to piston head; When rotating inner cylinder body with the adjusting damping, Returnning spring can be followed inner cylinder body and be rotated together, because piston has certain rotational resistance, therefore, piston can not rotate with inner cylinder body, perhaps and between the inner cylinder body can one of generation relatively rotate, and can produce friction because of relatively rotating thereby make between Returnning spring and the piston head, perhaps make Returnning spring generation distortion to a certain degree, even cause the inefficacy of Returnning spring.The present invention articulates the spring seat of a butterfly at the tail end of piston rod linkage section, to be used for the supporting of Returnning spring, when inner cylinder body rotates, the spring seat that articulates can rotate with Returnning spring, avoided the friction of Returnning spring and piston head, simultaneously, the frustoconic shape projection in the middle of the spring seat of butterfly can be carried out radially location to Returnning spring; In addition, the present invention adopts the snap ring structure that spring seat is carried out axial screens in the spring seat outside, and the snap ring of prior art generally is the elastic ring of an opening, rely on the elasticity of snap ring to snap in the annular groove of axle, though this class formation has advantage easy to assembly, be subjected to the quantitative limitation of snap ring resiliently deformable, its opening can not be too small, the long-time back snap ring that uses comes off easily, thereby influences the snap ring reliability during operation.For this reason, the present invention is designed to snap ring on the triangle ring of a sealing, earlier an annulus is set on the linkage section of piston rod during assembling, with frock clamping annulus is squeezed into the triangle ring then, and be embedded on the connecting end in the corresponding annular groove, snap ring can adopt copper material to make, and makes it have good ductility and wear resistance, when extrusion modling, can not rupture, and can avoid causing card not in place because of elastic recoil.In addition, when after piston rod is stressed, moving, piston rod promotes to move behind the spring seat by linkage section earlier, and by the spring seat compression reseting spring, behind the shoulder and the elimination of the slit between the piston head front-end face in piston rod, piston rod promotes piston head by shoulder and moves, and the fluid oil in the oil storage cavity is entered in the oil return cavity by the throttling oil circuit, press mutually between the shoulder of piston rod and the piston head and seal this moment, then generates the slit between the edge of spring seat and the ear end face of piston head; And when piston reset, Returnning spring promotes the preceding horizontal reset of spring seat earlier, spring seat then drives piston rod by linkage section and resets earlier, thereby the slit between the shoulder of recovery piston rod and the front-end face of piston head, and the edge of spring seat and the ear end face of piston head are fitted, spring seat promotes piston head and piston rod resets simultaneously then, at this moment, fluid oil in the oil return cavity can flow back in the oil storage cavity by the throttling oil circuit on the one hand, slit and the oil-return groove on the linkage section that produces between the front-end face of shoulder that also can be by piston rod and piston head flow back in the oil storage cavity simultaneously, thereby accelerated the speed of oil return greatly, piston can be resetted fast.
As preferably, be provided with the skeleton shape correcting body that is slidingly matched with the outer cylinder body inner side surface in the inboard of protecgulum, the center of correcting body is provided with the correcting hole that is slidingly matched with piston rod, the front end of correcting body and protecgulum are fitted, rear end and piston head are fitted, and be provided with oily breach at the edge of rear end, be provided with the elasticity pressure accumulation body that adopts the pressure accumulation sponge to make at the intermediate section and the cavity place between the outer cylinder body inner side surface of correcting body.The present invention is provided with skeleton shape correcting body in outer cylinder body leading portion inboard, both can effectively support and led piston rod, be stuck when avoiding piston rod work, can alleviate the weight of correcting body again, simultaneously, intermediate section and the cavity place between the outer cylinder body inner side surface at the correcting body just can be used for being provided with the pressure accumulation sponge, being used to regulate the volume size of oil return cavity, thereby help making compact structure.
In sum, the present invention has following beneficial effect: (1) inner cylinder body adopts and divides body structure, is convenient to its processing and improves machining accuracy; (2) capping of inner cylinder body is provided with the expansion oil groove, can avoid causing because of the dilatating and deformable of inner cylinder liner the loose or dislocation of capping; (3) Feng Bi angular clasp can be guaranteed the reliable of screens.
Description of drawings
Fig. 1 is a mounting structure schematic representation of the present invention;
Fig. 2 is a structural representation of the present invention;
Fig. 3 is an outer cylinder body structural representation of the present invention;
Fig. 4 is the A-A sectional view of Fig. 3;
Fig. 5 is an inner cylinder body structural representation of the present invention;
Fig. 6 is that the B of Fig. 5 is to view;
Fig. 7 is the structural representation after the throttling groove on the inner cylinder liner of the present invention flattens;
Fig. 8 a is the longitudinal cross-section schematic representation of the throttling groove of the embodiment of the invention 1;
Fig. 8 b is the longitudinal cross-section schematic representation of the throttling groove of the embodiment of the invention 2;
Fig. 9 is the structural representation of adjustment seat of the present invention;
Figure 10 is a structure of piston schematic representation of the present invention;
Figure 11 is the assembly structure schematic representation of outer cylinder body and inner cylinder body in a kind of adjustable hydraulic buffer of prior art.
Embodiment
The present invention will be further described below in conjunction with accompanying drawing.
Embodiment 1: in the embodiment shown in Figure 2, adjustable hydraulic buffer of the present invention, comprise the outer cylinder body of opening at two ends 1, in the back segment of outer cylinder body 1, be provided with the inner cylinder body 2 that is rotatably assorted, the structure of outer cylinder body 1 as shown in Figure 3, the inner side surface of its rear end is provided with the step 11 of closing in, and forms a positioning hole 12, so that support spacing to inner cylinder body 2.As Fig. 2, shown in Figure 5, inner cylinder body 2 adopts and divides body structure, comprise the steel inner cylinder liner 21 of a tubulose and the capping 22 that is embedded in inner cylinder liner 21 rear ends, capping 22 adopts brass to make, it comprises the mating part 220 that embeds in the inner cylinder liner 21 and the locating journal 222 that is rotatably assorted with the positioning hole 12 of outer cylinder body 1 rear end, between mating part 220 and locating journal 222, be provided with the axle collar 228, the shaft shoulder of the axle collar 228 1 sides carries out spacing to the inserted depth of mating part 220 in inner cylinder liner 21 of capping, its opposite side shaft shoulder is spacing on the end face of outer cylinder body 1 rear end step 11, thereby makes the reliable in the axial direction supporting of inner cylinder body 2 spacing.Because the locating journal 222 of capping and the positioning hole 12 on the step of outer cylinder body rear end are for being rotatably assorted, to realize between outer cylinder body 1 and the inner cylinder body 2 location radially, therefore, the inner side surface of the outer side surface of inner cylinder liner 21 and outer cylinder body 1 can be provided with tool withdrawal groove 32 respectively at the back segment near capping 22, the both processing of the fitting surface of convenient inside and outside cylinder body intermediate section, can under the prerequisite of guaranteeing quality of fit between the inside and outside cylinder body, reduce the grinding amount of inside and outside cylinder body fitting surface again, cut down finished cost.In addition, the annular expansion oil groove 221 coaxial with capping 22 is set on the end face of capping mating part 220, make the mating part 220 of capping 22 cylindrical, for making mating part 220 that enough resiliently deformables be arranged when being subjected to oil pressure, the general desirable 1mm～2.5mm of its thickness, its highly general desirable 2.5mm～5mm specifically can determine according to the specification size of adjustable hydraulic buffer, desirable CLV ceiling limit value when the inner cylinder body diameter is big, otherwise then desirable lower limit.The restraining groove 223 of annular is set on the outer side surface of locating journal 222, and the position of corresponding restraining groove 223 radially is provided with the stop screw 224 of screens in restraining groove 223 on the step 11 of outer cylinder body simultaneously, thereby can prevent the axial float of inner cylinder body 2.The root of locating journal 222 outer side surfaces then is provided with seal groove, and seal ring is set in seal groove, so that the rear end of outer cylinder body 1 is sealed.In addition, the oil hole 225 of band tapering axially is set at the center of capping 22 inner side ends, the tapering of oil hole 225 is 15 °, its small end inwardly, be provided with steel ball 226 in the oil hole 225, steel ball 226 is stuck in the big end of oil hole 225, and the big end rear side of oil hole 225 is provided with coaxial tapped hole, be provided with the Cock screw 227 that presses steel ball 226 in the tapped hole, thereby on oil hole 225, form an one-way valve structures.Further, on the ear end face of the locating journal 222 of capping, be provided with adjustment seat 10, adjustment seat 10 is made of large and small two sections step-like cylinders, the diameter of its big section cylinder is identical with the diameter of outer cylinder body 1 rear end, the segment cylinder is positioned at the positioning hole 12 of outer cylinder body 1 and is rotatably assorted with it, on the exterior edge face of adjustment seat 10, sunk screw is set, and adjustment seat 10 is fixedlyed connected with capping 22 by the tapped hole of the 225 big ends of oil hole in the capping.For avoiding occurring relatively rotating between adjustment seat 10 and the capping 22, as shown in Figure 6, the limited impression 229 that locating journal 222 end faces are offered radially and open at two ends in capping, simultaneously, as shown in Figure 9, at adjustment seat 10 segment cylinder end face settings spacing muscle 101 radially, spacing muscle 101 gos deep in the limited impression 229.
In addition, as shown in Figure 2, the piston 4 that is mated in the front end setting of inner cylinder body 2, thereby constitute an oil storage cavity 5, piston 4 comprises the piston head 42 that is slidingly matched with inner cylinder liner 21 and is connected with piston head 42 and stretches out the outer piston rod 41 of outer cylinder body 1, the front end of piston rod 41 is provided with a removable crashproof cap 45, the rear end that is connected with piston head 42 on the piston rod 41 is the linkage section 411 of one, thereby forming a shoulder 412 with linkage section 411 connecting parts, piston head 42 is cup shape, its center is provided with through hole and is set on the linkage section 411 of piston rod, between the shoulder 412 of the front-end face of piston head 42 and piston rod 41, leave the slit, above-mentioned slit can be chosen according to the specification size of buffer, generally between 0.3mm～2mm, simultaneously, on linkage section 411 and outer side surface that the central through bore of piston head 42 cooperates, be provided with the oil-return groove 413 that constitutes by tool withdrawal groove, thereby the cavity that is positioned at piston head 42 both sides is connected, certainly, described oil-return groove 413 also can be by being located on linkage section 411 outer side surfaces or the axial pass trough on the central through bore of piston head 42 constitutes.In addition, also be articulated with the spring seat 43 of butterfly at the tail end of linkage section 411, for ease of processing, spring seat 43 can adopt four paws structure shown in Figure 10, the end face of the edge of spring seat 43 and piston head 42 is fitted, jut in the middle of it is towards the rear end of piston rod 41, and at the outside of jut installation snap ring 44, accordingly, the axle journal that snap ring 44 is installed is set on the linkage section 411 of piston rod 41, and snap ring 44 is a closed circle that brass is made, and adopts frock clamping that it is squeezed into equilateral triangle, its three limits are embedded in the axle journal of linkage section 411, thereby to spring seat 43 screens reliably.For realizing resetting of piston 4, Returnning spring 9 is installed in inner cylinder body 2, Returnning spring 9 adopts stage clip, and the one end is close to the edge of butterfly spring seat 43, and the other end is close to the inner side end of capping 22.
In addition, as shown in Figure 2, be inlaid with protecgulum 13 at outer cylinder body 1 front end, and on protecgulum 13 and through hole that piston rod 41 cooperates, seal ring is set, thereby between outer cylinder body 1 and inner cylinder body 2 and piston 4, constitute an oil return cavity 6, the outer side surface of protecgulum 13 is provided with the fitting recess of annular, and the front end of outer cylinder body 1 carries out reducing and screens in fitting recess with necking down process, thereby fixedlys connected with protecgulum 13.And the skeleton shape correcting body 14 that is slidingly matched with outer cylinder body 1 inner side surface is set in the inboard of protecgulum 13, the center of correcting body 14 is provided with the correcting hole 142 that is slidingly matched with piston rod 41, the front end of correcting body 14 and protecgulum 13 are fitted, rear end and piston head 42 are fitted, thereby carry out spacing to resetting of piston 4, and oily breach 141 being set at the edge of correcting body 14 rear ends, the intermediate section at correcting body 14 is provided with the elasticity pressure accumulation body 3 that employing pressure accumulation sponge is made with the cavity place between outer cylinder body 1 inner side surface simultaneously.In addition, seal ring is set at correcting body 14 near the outer side surface of protecgulum 13 1 ends and inner side surface respectively, to guarantee the sealing effect of outer cylinder body 1 front end.
In order to realize regulating the purpose of damping size, as shown in Figure 2, between inner cylinder body 2 and outer cylinder body 1, be provided with throttling oil circuit 8, described throttling oil circuit 8 comprises 4 throttling grooves 81 that are arranged on inner cylinder liner 21 outer side surface circumferencial directions and is arranged on spout axial on the inner side surface of outer cylinder body 1 83, described throttling groove 81 is axially equidistantly to be arranged, the cross section of throttling groove 81 is a rectangle, shown in Fig. 8 a, the pairing central angle of the origin-to-destination of throttling groove 81 is 270 °, after flattening, it is shaped as isosceles triangle shown in Figure 7, thereby the width that makes the throttling groove cross section from origin-to-destination by wide to narrow linear successively decreasing, and then realize throttle orifice 82 radially being set the linear decrease of the area of throttling groove cross section from origin-to-destination simultaneously at the starting point place of throttling groove 81.And be located at long strip spout axial on the inner side surface of outer cylinder body 1 83 and throttling groove 81 mutual juxtapositions, and be connected with the interior oil return cavity 6 of outer cylinder body 1, as shown in Figure 4, the central angle of the width correspondence of spout 83 is 45 °.Owing to have the zone of 90 ° at one section corresponding central angle that throttling groove 81 is not set on the inner cylinder liner 21, therefore, when spout 83 and throttling groove 81 are overlapping, the throttling oil circuit is open-minded, oil storage cavity 5 is by throttle orifice 82, throttling groove 81, spout 83 and oil return cavity 6 UNICOMs, and when rotating inner cylinder body 2 when spout 83 being positioned at do not have on the inner cylinder liner 21 throttling groove 81 regional, throttling groove 81 is by the sealing of the madial wall of outer cylinder body 1, thereby throttling oil circuit 8 is disconnected.When spout 83 regional between the starting point of throttling groove 81 and terminal point, promptly constitute the liquid flow section of throttling oil circuit 8 on the spout 83 near the cross section of the determined throttling groove 81 in position of starting point one side.When inner cylinder body 2 rotated, the size of the liquid flow section of the determined throttling oil circuit 8 in position of close starting point one side promptly produced linear change on the spout 83.
Further, as shown in Figure 1, screw thread and two installation nuts 31 are set, on the outer side surface of outer cylinder body 1 with convenient installation of the present invention and use.
The present invention must fill with fluid oil earlier in use in oil storage cavity 5 and oil return cavity 6, specifically can use hydraulic oil or silicone oil etc.Unload lower adjusting seat 10 at first earlier, back out the Cock screw 227 on the oil hole 225 then and pour out steel ball 226, this moment can be by oiling in the oil storage cavity 5 of oil hole 225 in inner cylinder body 2, simultaneously, fluid oil enters in the oil return cavity 6 by throttling oil circuit 8, wait fill with fluid oil after, stop up oil holes 225 and tighten Cock screw 227 with steel ball 226, make oil hole 225 sealings, put in back adjustment seat 10.The present invention's mounting type is in use earlier offered mounting hole as shown in Figure 1 on the plate 33 of installation place, then adjustable hydraulic buffer is passed mounting hole, and uses installation nut 31 fixing getting final product respectively in the both sides of plate 33.
When the crashproof cap 45 of piston rod 41 front ends is subjected to clashing into pressure, piston rod 41 at first drives spring seats 43 by linkage section 411 and moves after together, simultaneously Returnning spring 9 is compressed, and progressively eliminate slit between the front-end face of the shoulder 412 of piston rod 41 and piston head 42, when the shoulder 412 of piston rod is close to the front-end face of piston head 42, form sealing between the two, then produce corresponding slit between the edge of the ear end face of piston head 42 and spring seat 43 at this moment, piston rod 41 promotes piston head 42 and spring seat 43 slides backward together, thereby oil storage cavity 5 is diminished, and oil return cavity 6 becomes big, fluid oil in the oil storage cavity 5 is under the pushing of piston head 42, enter by throttling oil circuit 8 in the oil return cavity 6 of outer cylinder body 1, because the liquid flow section of throttling oil circuit 8 is less, thereby fluid oil can produce bigger damping when flowing through, thereby reduces the Sliding velocity of piston 4, reaches the effect of buffering.Inner cylinder body 2 inner high voltage fluid oils enter in the expansion oil groove 221 of capping 22 simultaneously, and make the cylindrical shape mating part 220 that cooperates with inner cylinder liner 21 in the capping 22 expand outwardly distortion, thereby offset the dilatating and deformable amount of inner cylinder liner 21, to keep the interference fit between capping 22 and the inner cylinder liner 21, avoid producing loosening between the two.Because piston rod 41 progressively gos deep into outer cylinder body 1 inside, thereby the oil storage space in the whole outer cylinder body 1 reduces, at this moment, the pressure accumulation sponge is subjected to the effect of oil pressure and compresses, the fluid oil that enters oil return cavity 6 can enter the cavity that is positioned at piston head 42 front ends in the inner cylinder liner 2 by the oily breach 141 of the mistake on the correcting body 14 on the one hand, and another part fluid oil then enters in the cavity of pressure accumulation sponge compression back generation.When the pressure on the crashproof cap 45 is cancelled, Returnning spring 9 in the inner cylinder body 2 at first promotes piston rod 41 reaches by spring seat 43, and progressively eliminate slit between the ear end face of the edge of spring seat 43 and piston head 42, simultaneously, between the front-end face of the shoulder 412 of piston rod and piston head 42, regenerate the slit, when the edge of spring seat 43 is adjacent to the ear end face of piston head 42, Returnning spring 9 moves forward together by spring seat 43 promotion piston rods 41 and piston head 42 and resets, fluid oil in the oil return this moment cavity 6 flows back in the oil storage cavity 5 again by throttling oil circuit 8 on the one hand, slit and the oil-return groove 413 on the linkage section 411 between the front-end face of shoulder 412 by piston rod and piston head 42 flow back in the oil storage cavity 5 simultaneously, the pressure accumulation sponge then resiles, thereby piston 4 is resetted fast.By rotating adjustment seat 10, thereby inner cylinder body 2 is rotated to change the liquid flow section size of throttling oil circuit 8, damping size in the time of can changing fluid oil by throttling oil circuit 8, because the liquid flow section of throttling oil circuit 8 is linear change, but thereby the size of linearly adjust damping, and then reach the purpose of stepless change cushioning effect.
Claims (10)
1. adjustable hydraulic buffer, comprise outer cylinder body, be located at the inner cylinder body in the outer cylinder body back segment rotationally, be located at the protecgulum of outer cylinder body front end, be located at elasticity pressure accumulation body in the outer cylinder body and the piston of being located at the inner cylinder body front end, in outer cylinder body, constitute an oil storage cavity by piston and inner cylinder body, remaining cavity then constitutes the oil return cavity in the outer cylinder body, in oil storage cavity and oil return cavity, be filled with fluid oil, between inner cylinder body and outer cylinder body, be provided with the throttling oil circuit that is communicated with oil storage cavity and oil return cavity respectively, in inner cylinder body, also be provided with the Returnning spring that is used for piston reset, it is characterized in that, described inner cylinder body (2) adopts and divides body structure, comprise the inner cylinder liner (21) of tubulose and the capping (22) that is embedded in inner cylinder liner (21) rear end, be positioned in capping (22) on the end face of inner cylinder liner (21) one sides and be provided with the annular expansion oil groove (221) coaxial with capping (22), it is cylindrical that the mating part (220) that matches with inner cylinder liner (21) is gone up in capping (22), and the liquid flow section size of throttling oil circuit (8) is associated with the rotation angle of inner cylinder body (2).
2. adjustable hydraulic buffer according to claim 1, it is characterized in that, the inner side surface of described outer cylinder body (1) rear end is provided with the step (11) of closing in, and form a positioning hole (12), be positioned in the described capping (22) on the outer end face of inner cylinder liner (21) and extended axially locating journal (222), between the positioning hole (12) of locating journal (222) and step for being rotatably assorted, the outer side surface of described locating journal (222) is provided with the restraining groove (223) of annular, and the position of going up corresponding restraining groove (223) at outer cylinder body (1) radially is provided with the stop screw (224) of screens in restraining groove.
3. adjustable hydraulic buffer according to claim 2, it is characterized in that, described capping (22) is axially arranged with small end inwardly with the oil hole (225) of tapering, be provided with steel ball (226) in the oil hole (225), the big end of oil hole (225) backward side shaft to being extended with tapped hole, be provided with the Cock screw (22) that presses steel ball in the tapped hole, the tapering of described oil hole (225) is 12 °～30 °.
4. adjustable hydraulic buffer according to claim 3, it is characterized in that, be connected with adjustment seat (10) by the screw of being located at the axle center on the ear end face of described capping locating journal (222), adjustment seat (10) is made of large and small two sections step-like cylinders, the diameter of its big section cylinder is identical with the diameter of outer cylinder body (1) rear end, the positioning hole of segment cylinder and outer cylinder body (12) is rotatably assorted, and is provided with the rotation inhibiting limit structure between adjustment seat (10) and capping (22).
5. adjustable hydraulic buffer according to claim 4, it is characterized in that described rotation inhibiting limit structure comprises the limited impression (229) of radially being located at capping locating journal (222) end face, radially is located at adjustment seat (10) segment cylinder end face and go deep into spacing muscle (101) in the limited impression (229).
6. adjustable hydraulic buffer according to claim 1, it is characterized in that, described throttling oil circuit (8) comprises the throttling groove (81) of being located at inner cylinder liner (21) outer side surface circumferencial direction, the pairing central angle of origin-to-destination of throttling groove (81) is 150 °～300 °, the cross section of throttling groove (81) is a rectangle, or it is semicircle, or it is trapezoidal, the width of throttling groove (81) from origin-to-destination by wide to narrow linear successively decreasing, inner cylinder liner (21) is provided with throttle orifice (82) radially at the starting point place of throttling groove (81), the inner side surface of described outer cylinder body (1) is provided with axial spout (83), spout (83) and throttling groove (81) be juxtaposition mutually, and described spout (83) also links to each other with oil return cavity (6) in the outer cylinder body (1).
7. adjustable hydraulic buffer according to claim 1, it is characterized in that, described throttling oil circuit (8) comprises the throttling groove (81) of being located at inner cylinder liner (21) outer side surface circumferencial direction, the pairing central angle of origin-to-destination of throttling groove (81) is 150 °～300 °, the cross section of throttling groove (81) is a rectangle, or it is semicircle, or it is trapezoidal, the degree of depth of throttling groove (81) is successively decreased from origin-to-destination is linear from deep to shallow, the bottom surface of throttling groove (81) joins at destination county and inner cylinder liner (21) outer side surface slyness, inner cylinder liner (21) is provided with throttle orifice (82) radially at the starting point place of throttling groove (81), the inner side surface of described outer cylinder body (1) is provided with axial spout (83), spout (83) and throttling groove (81) be juxtaposition mutually, and described spout (83) also links to each other with oil return cavity (6) in the outer cylinder body (1).
8. adjustable hydraulic buffer according to claim 1, it is characterized in that, the piston rod (41) of described piston (4) is gone up the linkage section (411) that the rear end that is connected with piston head (42) is provided with one, and forming a shoulder (412) with linkage section (411) connecting part, the center of piston head (42) is provided with through hole and is set on the linkage section (411) of piston rod (41), between the shoulder (412) of the front-end face of piston head (42) and piston rod (41), leave the slit, on linkage section (411) and outer side surface that the central through bore of piston head (42) cooperates, be provided with oil-return groove (413), the tail end of described linkage section (411) is articulated with the spring seat (43) of butterfly, linkage section (411) is provided with snap ring (44) in the outside of spring seat (43), one end of described Returnning spring (9) is close to the inner side end of capping (22), and the other end is close to the edge of butterfly spring seat (43).
9. adjustable hydraulic buffer according to claim 8 is characterized in that, described snap ring (44) is the equilateral triangle structure of sealing.
10. according to claim 1 or 2 or 3 or 4 or 5 or 6 or 7 or 8 or 9 described adjustable hydraulic buffers, it is characterized in that, be provided with the skeleton shape correcting body (14) that is slidingly matched with outer cylinder body (1) inner side surface in the inboard of protecgulum (13), the center of correcting body (14) is provided with the correcting hole (142) that is slidingly matched with piston rod (41), the front end of correcting body (14) and protecgulum (13) are fitted, rear end and piston head (42) are fitted, and be provided with oily breach (141) at the edge of rear end, be provided with the elasticity pressure accumulation body (3) that adopts the pressure accumulation sponge to make at the intermediate section and the cavity place between outer cylinder body (1) inner side surface of correcting body (14).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101154761A CN101886683B (en) | 2010-01-29 | 2010-01-29 | Adjustable hydraulic buffer |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101154761A CN101886683B (en) | 2010-01-29 | 2010-01-29 | Adjustable hydraulic buffer |
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| CN101886683A CN101886683A (en) | 2010-11-17 |
| CN101886683B true CN101886683B (en) | 2011-11-30 |
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Families Citing this family (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102145674B (en) * | 2011-04-26 | 2012-09-26 | 东北大学 | Automobile collision energy-absorbing buffer device |
| CN102720794B (en) * | 2012-05-22 | 2014-05-07 | 奉化鑫益气动工程有限公司 | Anti-rotation air spring structure |
| CN102744613A (en) * | 2012-06-28 | 2012-10-24 | 上海三一精机有限公司 | Lead screw auxiliary support device and machine tool |
| CN104695791B (en) * | 2013-12-09 | 2017-01-18 | 庆安集团有限公司 | Damping coefficient variable hydraulic buffer |
| US10533624B2 (en) * | 2015-06-30 | 2020-01-14 | Hitachi Automotive Systems, Ltd. | Cylinder device |
| KR101836709B1 (en) * | 2016-10-04 | 2018-03-09 | 현대자동차주식회사 | Crash box for vehicle |
| CN107747607A (en) * | 2017-11-17 | 2018-03-02 | 苏州西捷克缓冲科技有限公司 | Oil buffer for direct-current high-voltage switch |
| CN109142931B (en) * | 2018-09-03 | 2021-11-23 | 苏州华兴源创科技股份有限公司 | System and method for testing piezoelectric ceramics |
| CN109595288B (en) * | 2018-12-11 | 2021-07-13 | 北京市捷瑞特弹性阻尼体技术研究中心 | Damping force adjusting mechanism |
| CN112963484A (en) * | 2021-01-29 | 2021-06-15 | 华中科技大学 | Continuous gradual change throttling type hydraulic buffer device |
| CN112676527B (en) * | 2021-03-12 | 2023-08-08 | 长沙理工大学 | Automatic electromagnetic riveter suitable for manipulator |
| CN113217482B (en) * | 2021-04-09 | 2022-03-11 | 燕山大学 | Piston type energy accumulator with built-in one-way valve |
| CN115370031A (en) * | 2022-09-08 | 2022-11-22 | 浙江大地钢结构有限公司 | Viscous fluid damper and steel structure system |
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| CN101886683A (en) | 2010-11-17 |
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Address after: Zhejiang province Fenghua City Siming road 315500 High-tech Park No. 88 Patentee after: Ningbo Yadeke Automatic Chemical Industry Co., Ltd. Address before: Zhejiang province Fenghua City Siming road 315500 High-tech Park No. 1 Patentee before: Ningbo Yadeke Automatic Chemical Industry Co., Ltd. |