阅读说明：本技术 高稳定性大缸径减振器 (High stability large-diameter damper ) 是由 蔡传闯 陈晓峰 马述生 于 2019-09-24 设计创作，主要内容包括：本发明公开了一种高稳定性大缸径减振器,包括外油管、内油管、防尘管、活塞杆总成、导向套、密封结构和压缩阀结构,活塞杆总成包括活塞杆、活塞、防尘管盖和吊环,活塞包括活塞本体、设置在活塞本体上的径向安装孔、配合径向安装孔的紧固圈以及一圈正向流通孔和一圈反向流通孔；压缩阀结构包括安装在内油管端部的压缩阀座、限位片、补偿弹簧及内流阀片；密封结构包括安装在导向套和外油管之间的油封和外油管盖。本发明压缩阀结构开阀流通灵敏度高、减振油补偿效果佳；活塞径向强度高,能够承受压紧螺母的扭矩大；活塞杆总成焊接效率高,保证焊接强度的稳定性,提高产品合格率；密封结构确保油封内侧和外侧的密封效果,保证减振器正常平稳工作。(The invention discloses a kind of high stability large-diameter dampers, including outer oil pipe, inner oil tube, Dustproof pipe, piston-rod assembly, guide sleeve, sealing structure and compression valve structure, piston-rod assembly includes piston rod, piston, Dustproof pipe lid and hanging ring, and piston includes piston only, the radially installed hole being arranged on piston only, the tight loop for cooperating radially installed hole and the positive recirculation hole of a circle and a circle reverse flow through-hole；Compression valve structure includes the compression valve seat for being mounted on inner oil tube end, limit film, counterbalance spring and interior stream valve block；Sealing structure includes the oil sealing being mounted between guide sleeve and outer oil pipe and outer oil pipe lid.Compression valve structure valve opening of the present invention circulation high sensitivity, damping oil compensation effect are good；Piston radial intensity is high, and the torque for being able to bear clamp nut is big；Piston-rod assembly welding efficiency is high, guarantees the stability of weld strength, improves product qualification rate；Sealing structure ensures the sealing effect of oil sealing inner side and outer side, guarantees the normal smooth working of damper.)

1. a kind of high stability large-diameter damper, including it is outer oil pipe, inner oil tube, Dustproof pipe, piston-rod assembly, guide sleeve, close Seal structure and compression valve structure, it is characterised in that:

The piston-rod assembly includes piston rod, piston, Dustproof pipe lid and hanging ring, the end of the piston rod, Dustproof pipe lid Lap welding welding, the middle part of the Dustproof pipe lid, hanging ring are carried out from the inside middle portion of Dustproof pipe lid between middle part and the bottom of hanging ring Bottom and piston rod end between carry out reinforcing weldering welding on the outside of the middle part of Dustproof pipe lid；

The piston includes piston only, the radially installed hole being arranged on piston only, the tight loop for cooperating radially installed hole And one enclose positive recirculation hole and a circle reverse flow through-hole, the maximum distance at forward direction recirculation hole to the piston only center is greater than To the maximum distance at piston only center, the minimum range of positive recirculation hole to piston only center is less than reversed reverse flow through-hole Recirculation hole is to the minimum range at piston only center, and positive recirculation hole and reverse flow through-hole are spaced apart, the piston only End face be equipped with indent, the reverse circulated hole is located in indent, and the positive recirculation hole is arranged in a staggered manner with indent；

The compression valve structure includes the compression valve seat for being mounted on inner oil tube end, limit film, counterbalance spring and interior stream valve block, institute Compression valve block of the compression valve seat equipped with a circle compensation oilhole and a circle compression oilhole and at least a piece of cooperation compression oilhole is stated, The compressed oil hole is located at the position on compression valve seat close to compression valve seat center, and the compensation oilhole, which is located on compression valve seat, to be leaned on The position of nearly compression valve seat outer ring, the interior stream valve block block the inside of compensation oilhole, and the compression valve block blocks compression oilhole Outside, the diameter of the compensation oilhole is greater than the diameter of compression oilhole, and the limit film and interior stream valve block be equipped with centre bore, The inner wall of the inner oil tube is equipped with the position limiting structure of cooperation limit film, and the limit film is supported on position limiting structure, the pressure Interior stream valve block and counterbalance spring are pressed in limit film by contracting valve seat；

The sealing structure includes the oil sealing being mounted between guide sleeve and outer oil pipe and outer oil pipe lid, and the one of the outer oil pipe lid End is clamped between outer oil pipe and guide sleeve, and oil sealing is pressed between guide sleeve and piston rod by the other end of outer oil pipe lid, institute It states and is equipped with sealing ring between outer oil pipe lid, outer oil pipe and guide sleeve.

2. a kind of high stability large-diameter damper according to claim 1, it is characterised in that: described interior in piston Recessed top is arc-shaped, and the interior minimum range for being recessed to piston only center is greater than positive recirculation hole to piston only center most Small distance is inside recessed to the minimum range of the minimum range less than reverse flow through-hole to piston only center at piston only center；Institute The center for stating positive recirculation hole is located at middle position of the tight loop between on the inside of piston only outer ring, the reverse flow through-hole Center is located at the middle position between on the outside of tight loop to piston only outer ring；The radial crushing strength of the piston is 59.2KN, The torque of the piston is 50N/M；The quantity of the forward direction recirculation hole and reverse flow through-hole is 6.

3. a kind of high stability large-diameter damper according to claim 1, it is characterised in that: in compression valve structure, The position limiting structure is three limit salient points, and three limit salient points are evenly distributed on the same circumferential inner wall of inner oil tube；It is described Counterbalance spring is one large one small, and the stub end of counterbalance spring is supported in limit film, and the small head end of counterbalance spring is supported on On interior stream valve block；The center-hole diameter of the limit film is greater than the center-hole diameter of interior stream valve block, the major part of the counterbalance spring The size at end and the size of limit film match, and the size of the small head end of counterbalance spring is greater than the center hole size of interior stream valve block； The minimum range at the compensation oilhole to compression valve seat center is greater than the center pore radius of interior stream valve block, the compression oilhole to pressure The maximum distance at contracting valve seat center is less than the center pore radius of interior stream valve block.

4. a kind of high stability large-diameter damper according to claim 3, it is characterised in that: the compensation oilhole to pressure The minimum range at contracting valve seat center is less than the center pore radius of limit film, and the maximum distance for compensating oilhole to compression valve seat center is big In the center pore radius of limit film；It sets on the periphery of the interior stream valve block there are three arc concave shape, three arc concave shapes are uniform It is distributed on the periphery of interior stream valve block；The quantity of one circle compensation oilhole and a circle compression oilhole is 6, all compensation oilholes The sum of sectional area be 95.4 square millimeters.

5. a kind of high stability large-diameter damper according to claim 1, it is characterised in that: the outer oil pipe lid includes The compacting ring at top, bottom clamp ring, connect the clamping ring of compacting ring and clamp ring, the top of the outer oil pipe is equipped with cooperation The sealing flange of clamp ring；The outer oil pipe, guide sleeve and outer oil pipe lid junction aerial cross sectional product be 0.5*4.25* 4.25=9.03,1.75*1.75=9.6 sectional area π * of the sealing ring.

6. a kind of high stability large-diameter damper according to claim 5, it is characterised in that: the compacting ring is by oil sealing It is pressed between guide sleeve and piston rod and constitutes inner seal structure, the clamp ring is clamped between sealing flange and guide sleeve simultaneously Sealing ring is set between clamp ring, guide sleeve and outer oil pipe and constitutes outer seal configuration；The guide sleeve is equipped with support oil sealing Bracing ring, the outer diameter of the internal diameter of the clamping ring and the outer diameter of oil sealing and bracing ring matches.

7. a kind of high stability large-diameter damper according to claim 5, it is characterised in that: the middle part of the outer oil pipe Outer surface is equipped with a circle and rolls ditch, and the rolling ditch is vertically arranged with outer oil pipe, and the width for rolling ditch is 15-20cm, rolls the depth of ditch For 0.5-0.8cm；The distance of the rolling ditch to sealing flange is less than rolling ditch to the distance of outer oil pipe bottom.

8. a kind of high stability large-diameter damper according to claim 1, it is characterised in that: the work of institute's compression valve structure It is as follows to make method, in piston-rod assembly drawing process, compression oilhole is blocked by compression valve block, and the damping oil in outer oil pipe is through pressing Stream valve block and counterbalance spring in compensation oilhole press on contracting valve seat, so that interior stream valve block valve opening, then by limit film Heart hole is flowed into inner oil tube；In piston-rod assembly compression process, compensation oilhole is blocked by interior stream valve block, subtracting in inner oil tube Compression oilhole on the oily centre bore through limit film of vibration, the interior centre bore and compression valve seat for flowing valve block flows into outer oil pipe.

9. a kind of high stability large-diameter damper according to claim 1, it is characterised in that: the piston-rod assembly Welding method is as follows:

1) by hanging ring be mounted in hanging ring tooling and the welding position of hanging ring upward, piston rod and Dustproof pipe lid are press-fitted, Dustproof pipe lid is mounted in Dustproof pipe lid tooling and the welding position of Dustproof pipe lid is corresponding with the welding position of hanging ring downward, By the welding position of the welding ends of piston rod, the welding position of Dustproof pipe lid and hanging ring to behind jail by piston rod tool locating, The other end of piston rod is pushed down with piston rod compressing structure；

2) welding gun and No.1 rotary table are opened, No.1 rotary table drives hanging ring tooling and the rotation of Dustproof pipe lid tooling, To drive hanging ring, Dustproof pipe lid and piston rod rotation, cooperate welding gun to the bottom of hanging ring, the end of piston rod and Dustproof pipe lid Middle part from the inside middle portion of Dustproof pipe lid carry out lap welding；

3) piston-rod assembly that lap welding is completed is taken off from welder, the bottom, piston by conventional welding gun to hanging ring The end of bar and the middle part of Dustproof pipe lid carry out reinforcement weldering on the outside of the middle part of Dustproof pipe lid.

10. a kind of high stability large-diameter damper according to claim 7, it is characterised in that: the sealing flange Processing technology is as follows:

1) one end of piston-rod assembly is protruded into outer oil pipe, and outer oil pipe lid is mounted on to the top of outer oil pipe；

2) connector of outer oil pipe bottom is placed in bed die, outer oil pipe top side is close to roller, and outer oil pipe top is another Side alignment sealing flange briquetting roller；

3) No. two rotary tables rotation driving outer oil pipes rotation, sealing flange briquetting roller advance to rolling at the top of outer oil pipe Swaging is fitted closely at sealing flange, sealing flange with outer oil pipe lid；

4) the outer surface processing rolling ditch of hydraulic drive mechanism driving rolling channel forming wheel rolling outer oil pipe；

5) during rolling channel forming, since the middle part of outer oil pipe is tightened, so that the upper and lower ends of outer oil pipe are to centre It tenses, increases the pretightning force of sealing flange, it is ensured that pressing force of the sealing flange to outer oil pipe lid and oil sealing.

Technical field

The present invention relates to a kind of damper of improvement more particularly to a kind of high stability large-diameter dampers.

Background technique

Currently, the compressing valve system in existing large-diameter (big damping force) damper usually consolidates interior stream valve block and counterbalance spring Dingan County is on compression valve seat, and the valve opening sensitivity of interior stream valve block is poor, and the flexibility for causing damping oil to circulate is also poor, and The aperture of damping oil recirculation hole (compensation oilhole) is smaller, and often the sectional area of all recirculation holes is usual are as follows: and 72.6 square millimeters, very To smaller, so as to cause damper, when piston-rod assembly Compression and Expansion moves, damping oil compensation is insufficient, middle and high speed compression travel Place can generate idle running distortion phenomenon, as shown in figure 9, compression travel idle running, distortion generally are occurred as soon as in middling speed 0.26m/s, thus Influence the job stability and reliability of damper；

Generally radially (recirculation hole is enclosed in inside one to double straight hole structure to piston radial through-hole in high stability large-diameter damper Recirculation hole is enclosed with outside one, the center and the center of piston of two circle recirculation holes are located along the same line), the shortcomings that this piston: Radial double straight hole distribution area is big, and axial impact strength is low, and generally radially crushing strength is that 22.28KN is even lower, living Fastening face area beyond the Great Wall is small, relatively low so as to cause torque, and the torque generally born is that 20N/M is even lower, and processing is complicated, right The stability and poor reliability of product damping force.

Piston-rod assembly welding procedure in high stability large-diameter damper is usually first by piston rod and Dustproof pipe lid It is press-fitted, then carries out spot welding between the two, then the Dustproof pipe lid and piston rod and hanging ring that electric welding is completed are subjected to reinforcement weldering, Not only welding efficiency is low for this manufacturing procedure, and welding cost is high, and piston rod and Dustproof pipe lid carry out press-fitting and pinpoint welding procedure Middle piston rod need to play a supporting role, and be easy to damage piston rod surface, and piston rod and Dustproof pipe lid and hanging ring carry out reinforcement weldering When, due to before piston rod between hanging ring absolutely not any connection relationship, cause it to be easy during reinforcing weldering Shaking is generated, consistency is poor, and weld strength is unstable, influences the qualification rate of product；

The sealing structure of high stability large-diameter damper generallys use board-like oil sealing cooperation outer oil pipe, inner oil tube and piston rod and comes Realize the inside and outside sealing (as shown in Figure 10) of damper, this kind of sealing structure intensity is not high enough, leads to its not impact resistance, works as resistance When Buddhist nun's power is larger, board-like oil sealing is easily-deformable to arch upward, and causes on the inside of oil sealing between piston rod there may be oil leak, on the outside of oil sealing with Oil leak may also be generated between outer oil pipe, seriously affects its leakproofness, in some instances it may even be possible to cause damper can not normal smooth working.

Summary of the invention

The present invention is to solve sealing problem existing for the existing big damping shock absorber of large-diameter, provides a kind of compression valve structure In interior stream valve block, counterbalance spring, limit film and compression valve seat separately design, while designing position limiting structure in inner oil tube and matching Stream valve block and counterbalance spring in conjunction limit film support increase the sectional area of recirculation hole, high sensitivity that structure is simple, valve opening circulates, Damping oil compensation effect is good, avoids that damper occurs middle and high fast compression travel idle running in Compression and Expansion movement, distortion shows As stability is high, it is ensured that the normal smooth working of damper；

Radial double straight hole structure is improved to radial single straight hole structure in piston, so that all recirculation holes are generally within same On circle, reduce Piston Machining area, improves radial strength, and increase the fastening face area on piston, be able to bear pressure The bigger torque of tight nut, so that absorber damping force is more stable, better reliability；

Piston rod, Dustproof pipe lid and hanging ring are first carried out disposable lap welding in piston-rod assembly to weld together, then carried out Piston when reinforcing weldering welding, damage when avoiding piston rod and Dustproof pipe lid spot welding to piston rod surface, while preventing from reinforcing welding The shaking of bar, it is ensured that its consistency improves welding efficiency, reduces welding cost, guarantees the stability of weld strength, improves product Qualification rate；

Sealing structure reinforces oil sealing using outer oil pipe lid, prevents oil sealing by big damping force blastic deformation, and in outer oil pipe lid, outer Sealing ring is designed between oil pipe and guide sleeve, improves intensity and leakproofness, it is ensured that the sealing effect of oil sealing inner side and outer side guarantees The high stability large-diameter damper of the normal smooth working of damper.

For this purpose, the present invention adopts the following technical scheme that: a kind of high stability large-diameter damper, including outer oil pipe, interior oil Pipe, Dustproof pipe, piston-rod assembly, guide sleeve, sealing structure and compression valve structure,

The piston-rod assembly includes piston rod, piston, Dustproof pipe lid and hanging ring, the end of the piston rod, Dustproof pipe lid Lap welding welding, the middle part of the Dustproof pipe lid, hanging ring are carried out from the inside middle portion of Dustproof pipe lid between middle part and the bottom of hanging ring Bottom and piston rod end between carry out reinforcing weldering welding on the outside of the middle part of Dustproof pipe lid；

The piston includes piston only, the radially installed hole being arranged on piston only, the tight loop for cooperating radially installed hole And one enclose positive recirculation hole and a circle reverse flow through-hole, the maximum distance at forward direction recirculation hole to the piston only center is greater than To the maximum distance at piston only center, the minimum range of positive recirculation hole to piston only center is less than reversed reverse flow through-hole Recirculation hole is to the minimum range at piston only center, and positive recirculation hole and reverse flow through-hole are spaced apart, the piston only End face be equipped with indent, the reverse circulated hole is located in indent, and the positive recirculation hole is arranged in a staggered manner with indent；

The compression valve structure includes the compression valve seat for being mounted on inner oil tube end, limit film, counterbalance spring and interior stream valve block, institute Compression valve block of the compression valve seat equipped with a circle compensation oilhole and a circle compression oilhole and at least a piece of cooperation compression oilhole is stated, The compressed oil hole is located at the position on compression valve seat close to compression valve seat center, and the compensation oilhole, which is located on compression valve seat, to be leaned on The position of nearly compression valve seat outer ring, the interior stream valve block block the inside of compensation oilhole, and the compression valve block blocks compression oilhole Outside, the diameter of the compensation oilhole is greater than the diameter of compression oilhole, and the limit film and interior stream valve block be equipped with centre bore, The inner wall of the inner oil tube is equipped with the position limiting structure of cooperation limit film, and the limit film is supported on position limiting structure, the pressure Interior stream valve block and counterbalance spring are pressed in limit film by contracting valve seat；

The sealing structure includes the oil sealing being mounted between guide sleeve and outer oil pipe and outer oil pipe lid, and the one of the outer oil pipe lid End is clamped between outer oil pipe and guide sleeve, and oil sealing is pressed between guide sleeve and piston rod by the other end of outer oil pipe lid, institute It states and is equipped with sealing ring between outer oil pipe lid, outer oil pipe and guide sleeve.

Interior stream valve block, counterbalance spring, limit film and compression valve seat in compression valve structure of the present invention separately design, while Design position limiting structure flows valve block and counterbalance spring to cooperate in limit film support in inner oil tube, increases the sectional area of recirculation hole, ties Structure is simple, valve opening circulation high sensitivity, damping oil compensation effect are good, avoid damper occur in Compression and Expansion movement in, The phenomenon that high speed compression stroke idle running, distortion, stability is high, it is ensured that the normal smooth working of damper；

Radial double straight hole structure is improved to radial single straight hole structure in piston, so that all recirculation holes are generally within same On circle, reduce Piston Machining area, improves radial strength, and increase the fastening face area on piston, be able to bear pressure The bigger torque of tight nut, so that absorber damping force is more stable, better reliability；

Piston rod, Dustproof pipe lid and hanging ring are first carried out disposable lap welding in piston-rod assembly to weld together, then carried out Piston when reinforcing weldering welding, damage when avoiding piston rod and Dustproof pipe lid spot welding to piston rod surface, while preventing from reinforcing welding The shaking of bar, it is ensured that its consistency improves welding efficiency, reduces welding cost, guarantees the stability of weld strength, improves product Qualification rate；

Sealing structure reinforces oil sealing using outer oil pipe lid, prevents oil sealing by big damping force blastic deformation, and in outer oil pipe lid, outer Sealing ring is designed between oil pipe and guide sleeve, improves intensity and leakproofness, it is ensured that the sealing effect of oil sealing inner side and outer side guarantees The normal smooth working of damper.

Preferably, in piston, the top of the indent is arc-shaped, and the interior minimum range for being recessed to piston only center is big In positive recirculation hole to the minimum range at piston only center, the minimum range for being inside recessed to piston only center is less than reverse circulated Minimum range of the hole to piston only center；The center of the forward direction recirculation hole is located at tight loop to piston only outer ring inside Between middle position, the center of the reverse flow through-hole is located at middle position of the tight loop between on the outside of piston only outer ring； The radial crushing strength of the piston is 59.2KN, and the torque of the piston is 50N/M；The forward direction recirculation hole and reverse flow through-hole Quantity is 6.

This kind of structure ensures that the circulation at circulating face is more unobstructed reliable；So that the Working position on piston is more uniform, Further increase its radial strength.

Preferably, in compression valve structure, the position limiting structure is three limit salient points, and three limit salient points are uniformly distributed On the same circumferential inner wall of inner oil tube；The counterbalance spring is one large one small, and the stub end of counterbalance spring is supported on limit On bit slice, the small head end of counterbalance spring is supported on interior stream valve block；The center-hole diameter of the limit film is greater than interior stream valve block Center-hole diameter, the size of the stub end of the counterbalance spring and the size of limit film match, the small head end of counterbalance spring Size is greater than the center hole size of interior stream valve block；The minimum range at the compensation oilhole to compression valve seat center is greater than interior stream valve block Center pore radius, it is described compression oilhole to compression valve seat center maximum distance be less than it is interior flow valve block center pore radius.

This kind of structure not only makes the structure of position limiting structure simple, easy to make, and also ensures the intensity of inner oil tube It is unaffected；So that damping oil is to the more flexible stabilization of the compression of counterbalance spring, so that it is guaranteed that the folding of interior stream valve block is cleverer It is living reliable；Ensure that support of the counterbalance spring between limit film and interior stream valve block is more reliable and more stable；Interior stream valve block can be fine Cover compensation oilhole inside, while it is interior stream valve block centre bore can be very good with compress oilhole be connected to.

Preferably, the compensation oilhole is less than the center pore radius of limit film to the minimum range at compression valve seat center, mends Repay the center pore radius that oilhole is greater than limit film to the maximum distance at compression valve seat center；It is set on the periphery of the interior stream valve block There are three arc concave shape, three arc concave shapes are uniformly distributed on the periphery of stream valve block inside；One circle compensation oilhole and a circle pressure The quantity of contracting oilhole is 6, and the sum of the sectional area of all compensation oilholes is 95.4 square millimeters.

This kind of structure makes the centre bore of limit film larger, and damping oil opens the inflow later of interior stream valve block by compensating oilhole The more unobstructed stabilization of inner oil tube；So that interior stream valve block is more easier to be opened, further increases it and open and close sensitivity；So that it is mended The total sectional area for repaying oilhole is 1.3 times of total sectional area of compensation oilhole of conventional compact valve arrangement, further ensures that its vibration damping The compensation rate of oil, it is ensured that its job stability and reliability.

Preferably, the outer oil pipe lid includes the compacting ring at top, the clamp ring of bottom, connection compacting ring and clamp ring Clamping ring, the top of the outer oil pipe are equipped with outer oil pipe described in the sealing flange of cooperation clamp ring, guide sleeve and outer oil pipe lid The aerial cross sectional product of junction is 0.5*4.25*4.25=9.03,1.75*1.75=9.6 sectional area π * of the sealing ring.

This kind of structure further ensures that the intensity and sealing effect of sealing structure；Outer oil pipe, guide sleeve and outer oil pipe lid Junction aerial cross sectional product be less than sealing ring sectional area so that sealing ring be enough the space at triplicity is close Envelope, prevents the gap between three from oil leakage phenomenon occur.

Preferably, oil sealing is pressed between guide sleeve and piston rod by the compacting ring constitutes inner seal structure, the card Collar is clamped between sealing flange and guide sleeve and is arranged between clamp ring, guide sleeve and outer oil pipe close outside sealing ring composition Seal structure；The guide sleeve is equipped with the bracing ring of support oil sealing, the internal diameter of the clamping ring and the outer diameter of oil sealing and bracing ring Outer diameter match.

The present invention reduces the board-like oil sealing of original major diameter, is pressed into outer oil pipe lid, covers tightly oil sealing with outer oil pipe close Patch jail generates fixed function to oil sealing, so that oil sealing is able to bear strong impact power caused by big damp, while a part being rushed It hits power and is transferred to more strong outer oil pipe and cover, outer oil pipe lid is thickened, improve impact resistant strength.Oil sealing of the invention is to subtract The device that shakes provides interior sealing function；Sealing ring, which is mounted between outer oil pipe lid, guide sleeve and outer oil pipe, provides external seal work for damper With；So that it is hided in outer oil pipe lid oil sealing diminution, give oil sealing and more protect, will not excessively damped greatly because oil sealing exposes When impact, guide sleeve chamber pressure is excessive and oil sealing is made to generate deformation of arching upward, while outer oil pipe lid being thickeied, and increases damper Intensity and impact resistance.

Preferably, the center outer surface of the outer oil pipe is equipped with a circle and rolls ditch, and the rolling ditch is vertically arranged with outer oil pipe, and The width for rolling ditch is 15-20cm, and the depth for rolling ditch is 0.5-0.8cm；The distance of the rolling ditch to sealing flange is less than rolling ditch and arrives The distance of outer oil pipe bottom.

The outer oil pipe of high stability large-diameter damper is carried out by the way of sealing flange cooperation outer oil pipe lid and oil sealing Sealing, it will usually because the pretightning force of sealing flange is inadequate, cause outer oil pipe lid and oil sealing to loosen, so that its leakproofness and stabilization Property it is poor, under high-intensitive operating condition running be easy to happen leakage so that the normal smooth working of damper is affected；The present invention Using in such a way that ditch is rolled in the outer surface of outer oil pipe to being tightened in the middle part of outer oil pipe, to the both ends of outer oil pipe generate one to Intermediate tightening force, to increase the pretightning force of sealing flange, it is ensured that sealing flange protects the pressing force of outer oil pipe lid and oil sealing Demonstrate,prove its leakproofness and stability, it is ensured that the normal smooth working of damper.

Preferably, the working method of institute's compression valve structure is as follows, and in piston-rod assembly drawing process, compression oilhole is pressed Contracting valve block is blocked, the damping oil in outer oil pipe stream valve block and counterbalance spring in the compensation oilhole press on compression valve seat, so that Interior stream valve block valve opening, is then flowed into inner oil tube by the centre bore of limit film；In piston-rod assembly compression process, compensation Oilhole is blocked by interior stream valve block, centre bore, the interior centre bore and compression valve that flow valve block of the damping oil in inner oil tube through limit film Compression oilhole on seat flows into outer oil pipe.

Preferably, the welding method of the piston-rod assembly is as follows:

1) by hanging ring be mounted in hanging ring tooling and the welding position of hanging ring upward, piston rod and Dustproof pipe lid are press-fitted, Dustproof pipe lid is mounted in Dustproof pipe lid tooling and the welding position of Dustproof pipe lid is corresponding with the welding position of hanging ring downward, By the welding position of the welding ends of piston rod, the welding position of Dustproof pipe lid and hanging ring to behind jail by piston rod tool locating, The other end of piston rod is pushed down with piston rod compressing structure；

2) welding gun and No.1 rotary table are opened, No.1 rotary table drives hanging ring tooling and the rotation of Dustproof pipe lid tooling, To drive hanging ring, Dustproof pipe lid and piston rod rotation, cooperate welding gun to the bottom of hanging ring, the end of piston rod and Dustproof pipe lid Middle part from the inside middle portion of Dustproof pipe lid carry out lap welding；

3) piston-rod assembly that lap welding is completed is taken off from welder, the bottom, piston by conventional welding gun to hanging ring The end of bar and the middle part of Dustproof pipe lid carry out reinforcement weldering on the outside of the middle part of Dustproof pipe lid.

Preferably, the processing technology of the sealing flange is as follows:

1) one end of piston-rod assembly is protruded into outer oil pipe, and outer oil pipe lid is mounted on to the top of outer oil pipe；

2) connector of outer oil pipe bottom is placed in bed die, outer oil pipe top side is close to roller, and outer oil pipe top is another Side alignment sealing flange briquetting roller；

3) No. two rotary tables rotation driving outer oil pipes rotation, sealing flange briquetting roller advance to rolling at the top of outer oil pipe Swaging is fitted closely at sealing flange, sealing flange with outer oil pipe lid；

4) the outer surface processing rolling ditch of hydraulic drive mechanism driving rolling channel forming wheel rolling outer oil pipe；

5) during rolling channel forming, since the middle part to outer oil pipe is tightened, so that the upper and lower ends of outer oil pipe are in Between tense, increase the pretightning force of sealing flange, it is ensured that sealing flange is to the pressing force of outer oil pipe lid and oil sealing.

Interior stream valve block, counterbalance spring, limit film and compression valve seat in compression valve structure of the present invention separately design, while Design position limiting structure flows valve block and counterbalance spring to cooperate in limit film support in inner oil tube, increases the sectional area of recirculation hole, ties Structure is simple, valve opening circulation high sensitivity, damping oil compensation effect are good, avoid damper occur in Compression and Expansion movement in, The phenomenon that high speed compression stroke idle running, distortion, stability is high, it is ensured that the normal smooth working of damper；

Radial double straight hole structure is improved to radial single straight hole structure in piston, so that all recirculation holes are generally within same On circle, reduce Piston Machining area, improves radial strength, and increase the fastening face area on piston, be able to bear pressure The bigger torque of tight nut, so that absorber damping force is more stable, better reliability；

Piston rod, Dustproof pipe lid and hanging ring are first carried out disposable lap welding in piston-rod assembly to weld together, then carried out Piston when reinforcing weldering welding, damage when avoiding piston rod and Dustproof pipe lid spot welding to piston rod surface, while preventing from reinforcing welding The shaking of bar, it is ensured that its consistency improves welding efficiency, reduces welding cost, guarantees the stability of weld strength, improves product Qualification rate；

Sealing structure reinforces oil sealing using outer oil pipe lid, prevents oil sealing by big damping force blastic deformation, and in outer oil pipe lid, outer Sealing ring is designed between oil pipe and guide sleeve, improves intensity and leakproofness, it is ensured that the sealing effect of oil sealing inner side and outer side guarantees The normal smooth working of damper.

Detailed description of the invention

Fig. 1 is the structural diagram of the present invention；

Fig. 2 is the structural schematic diagram in the present invention at sealing structure；

Fig. 3 is the structural schematic diagram of outer oil pipe lid in the present invention；

Fig. 4 is the structural schematic diagram of compression valve structure in the present invention；

Fig. 5 is that compression valve structure applies to after damper and shows function lab diagram in the present invention；

Fig. 6 is the structural schematic diagram of piston in the present invention；

Schematic diagram when Fig. 7 is piston-rod assembly welding in the present invention；

Fig. 8 is the machining sketch chart that flange is sealed in the present invention；

Fig. 9 is that the compression valve structure in background of invention applies to after damper and shows function lab diagram；

Figure 10 is the structural schematic diagram in background of invention at sealing structure；

1. outer oil pipe in figure, 2. inner oil tubes, 3. piston-rod assemblies, 4. Dustproof pipes, 5. guide sleeves, 6. compression valve structures, 7. sealings Structure, 8. pistons, 9. oil sealings, 10. piston rods, 11. outer oil pipe lids, 12. sealing rings, 13. compacting rings, 14. clamp rings, 15. connect Adapter ring, 16. sealing flange, 17. bracing rings, 18. compression valve seats, 19. compensation oilholes, 20. interior stream valve blocks, 21. counterbalance springs, 22. limit film, 23. limit salient points, 24. compression oilholes, 25. compression valve blocks, 26. piston onlies, 27. radially installed holes, 28. is tight Gu Quan, 29. positive recirculation holes, 30. reverse flow through-holes, 31. indents, 32. Dustproof pipe lids, 33. hanging rings, 34. No.1 rotary works Platform, 35. hanging ring toolings, 36. Dustproof pipe lid toolings, 37. piston rod toolings, 38. briquettings, 39. driving cylinders, 40. welding guns, 41. Connector, 42. rollers, 43. sealing flange briquetting rollers, 44. rolling ditches, 45. rolling channel forming wheels, 46. hydraulic drive mechanisms, 47. into Move back distance-sensor, 48. No. two rotary tables, 49. bed dies, 50. piston only outer rings.

Specific embodiment

The invention will now be described in further detail with reference to the accompanying drawings, but is not the limit to the scope of the present invention System.

As shown in figures 1-8, a kind of high stability large-diameter damper, including outer oil pipe 1, inner oil tube 2, Dustproof pipe 4, piston Bar assembly 3, guide sleeve 5, sealing structure 7 and compression valve structure 6,

The piston-rod assembly 3 includes piston rod 10, piston 8, Dustproof pipe lid 32 and hanging ring 33, the end of piston rod 10, dust-proof Lap welding welding is carried out from the inside middle portion of Dustproof pipe lid 32 between the middle part of pipe lid 32 and the bottom of hanging ring 33, Dustproof pipe lid 32 It carries out reinforcing weldering welding on the outside of the middle part of Dustproof pipe lid 32 between middle part, the bottom of hanging ring 33 and the end of piston rod 10；

The piston 8 includes piston only 26, the radially installed hole 27 being arranged on piston only 26, cooperation radially installed hole 27 Tight loop 28 and one enclose positive recirculation hole 29 and a circle reverse flow through-hole 30, positive recirculation hole 29 arrives 26 center of piston only Maximum distance be greater than reverse flow through-hole 30 arrive 26 center of piston only maximum distance, positive recirculation hole 29 arrive piston only 26 The minimum range at center is less than the minimum range that reverse flow through-hole 30 arrives 26 center of piston only, and positive recirculation hole 29 and reversed Recirculation hole 30 is spaced apart, and the end face of piston only 26 is equipped with indent 31, and reverse flow through-hole 30 is located in indent 31, forward stream Through-hole 29 is arranged in a staggered manner with indent 31；

The compression valve structure 6 includes being mounted on the compression valve seat 18 of 2 end of inner oil tube, limit film 22, counterbalance spring 21 and interior Valve block 20 is flowed, compression valve seat 18 is equipped with a circle compensation oilhole 19 and a circle compression oilhole 24 and three pieces cooperation compression oilhole 24 Compression valve block 25, compression oilhole 24 be located on compression valve seat 18 close to 18 center of compression valve seat position, compensation oilhole 19 In the position on compression valve seat 18 close to 18 outer ring of compression valve seat, interior stream valve block 20 blocks the inside of compensation oilhole 19, compression valve Piece 25 blocks the outside of compression oilhole 24, and the diameter of compensation oilhole 19 is greater than the diameter of compression oilhole 24, limit film 22 and interior stream Valve block 20 is equipped with centre bore, and the inner wall of inner oil tube 2 is equipped with the position limiting structure of cooperation limit film 22, and limit film 22 is supported on limit On bit architecture, interior stream valve block 20 and counterbalance spring 21 are pressed in limit film 22 by compression valve seat 18；

The sealing structure includes the oil sealing 9 and outer oil pipe lid 11 being mounted between guide sleeve 5 and outer oil pipe 1, outer oil pipe lid 11 One end be clamped between outer oil pipe 1 and guide sleeve 5, oil sealing 9 is pressed on guide sleeve 5 and piston by the other end of outer oil pipe lid 11 Between bar 10, sealing ring 12 is equipped between outer oil pipe lid 11, outer oil pipe 1 and guide sleeve 5.

In piston 8, the top of indent 31 is arc-shaped, and the minimum range at indent 31 to 26 center of piston only is greater than just The minimum range at 26 center of piston only is arrived to recirculation hole 29, the minimum range of indent 31 to 26 center of piston only is less than reversed Recirculation hole 30 arrives the minimum range at 26 center of piston only；The center of positive recirculation hole 29 is located at outside tight loop 28 to piston only Middle position between 50 inside of circle, the center of reverse flow through-hole 30 are located at tight loop 28 between 50 outside of piston only outer ring Middle position；The radial crushing strength of the piston 8 is 59.2KN, and the torque of the piston 8 is 50N/M；Positive 29 He of recirculation hole The quantity of reverse flow through-hole 30 is 6.

In compression valve structure 6, position limiting structure is three limit salient points 23, and three limit salient points 23 are uniformly distributed oil inside On the same circumferential inner wall of pipe 2；Counterbalance spring 21 is one large one small, and the stub end of counterbalance spring 21 is supported on limit film 22 On, the small head end of counterbalance spring 21 is supported on interior stream valve block 20；The center-hole diameter of limit film 22 is greater than interior stream valve block 20 The size of center-hole diameter, the size and limit film 22 of the stub end of counterbalance spring 21 matches, the small head end of counterbalance spring 21 Size be greater than it is interior stream valve block 20 center hole size；The minimum range for compensating oilhole 19 to 18 center of compression valve seat is greater than interior stream The center pore radius of valve block 20, the maximum distance of compression oilhole 24 to 18 center of compression valve seat are less than the centre bore of interior stream valve block 20 Radius.The center pore radius that oilhole 19 is less than limit film 22 to the minimum range at 18 center of compression valve seat is compensated, oilhole 19 is compensated It is greater than the center pore radius of limit film 22 to the maximum distance at 18 center of compression valve seat；The periphery of interior stream valve block 20 is equipped with three A arc concave shape, three arc concave shapes are uniformly distributed on the periphery of stream valve block 20 inside；One circle compensation oilhole 19 and a circle pressure The quantity of contracting oilhole 24 is 6, and the sum of the sectional area of all compensation oilholes 19 is 95.4 square millimeters.

Outer oil pipe lid 11 includes the compacting ring 13 at top, the clamp ring 14 of bottom, connection compacting ring 13 and clamp ring 14 Clamping ring 15, the top of outer oil pipe 1 are equipped with the sealing flange 16 of cooperation clamp ring 14；Outer oil pipe 1, guide sleeve 5 and outer oil pipe lid The aerial cross sectional product of 11 junction is 0.5*4.25*4.25=9.03,1.75*1.75=9.6 sectional area π * of sealing ring 12.Pressure Oil sealing 9 is pressed between guide sleeve 5 and piston rod 10 and constitutes inner seal structure by collar 13, and clamp ring 14 is clamped on sealing flange Sealing ring 12 is set between 16 and guide sleeve 5 and between clamp ring 14, guide sleeve 5 and outer oil pipe 1 and constitutes outer seal configuration；It leads The bracing ring 17 of support oil sealing 9, the outer diameter phase of the internal diameter of clamping ring 15 and the outer diameter of oil sealing 9 and bracing ring 17 are equipped with to set 5 Matching.The center outer surface of outer oil pipe 1 is equipped with a circle and rolls ditch 44, and rolling ditch 44 is vertically arranged with outer oil pipe 1, and rolls the width of ditch 44 For 15-20cm, the depth for rolling ditch 44 is 0.5-0.8cm；The distance for rolling ditch 44 to sealing flange 16 is less than rolling ditch 44 and arrives outer oil pipe 1 The distance of bottom.

The working method of compression valve structure 6 is as follows, in 3 drawing process of piston-rod assembly, compresses oilhole 24 by compression valve Piece 25 is blocked, and the damping oil in outer oil pipe 2 presses interior stream valve block 20 and counterbalance spring through the compensation oilhole 19 on compression valve seat 18 21, so that interior 20 valve opening of stream valve block, is then flowed into inner oil tube 2 by the centre bore of limit film 22；It is pressed in piston-rod assembly 3 In compression process, compensation oilhole 19 is blocked by interior stream valve block 20, centre bore, interior stream of the damping oil in inner oil tube 2 through limit film 22 Compression oilhole 24 on the centre bore and compression valve seat 18 of valve block 20 flows into outer oil pipe 1.

The welding method of piston-rod assembly 3 is as follows:

1) by hanging ring 33 be mounted in hanging ring tooling 35 and the welding position of hanging ring 33 upward, by piston rod 10 and Dustproof pipe lid 32 Be press-fitted, by Dustproof pipe lid 32 be mounted in Dustproof pipe lid tooling 36 and the welding position of Dustproof pipe lid 32 downward with hanging ring 33 Welding position it is corresponding, by the welding ends of piston rod 10, Dustproof pipe lid 32 welding position and hanging ring 33 welding position pair It is positioned behind jail by piston rod tooling 37, the other end of piston rod 10 is pushed down with piston rod compressing structure；

2) welding gun 40 and No.1 rotary table 34 are opened, No.1 rotary table 34 drives hanging ring tooling 35 and Dustproof pipe lid work 36 rotations are filled, so that hanging ring 33, Dustproof pipe lid 32 and piston rod 10 be driven to rotate, cooperate bottom of the welding gun 40 to hanging ring 33, work The end of stopper rod 10 and the middle part of Dustproof pipe lid 32 carry out lap welding from the inside middle portion of Dustproof pipe lid 32；

3) piston-rod assembly 3 that lap welding is completed is taken off from welder, the bottom, work by conventional welding gun to hanging ring 33 The end of stopper rod 10 and the middle part of Dustproof pipe lid 32 carry out reinforcement weldering on the outside of the middle part of Dustproof pipe lid 32.

The processing technology for sealing flange 16 is as follows:

1) one end of piston-rod assembly 3 is protruded into outer oil pipe 1, and outer oil pipe lid 11 is mounted on to the top of outer oil pipe 1；

2) connector 31 of 1 bottom of outer oil pipe is placed in bed die 49,1 top side of outer oil pipe is close to roller 42, outer oil pipe 1 Top other side alignment sealing flange briquetting roller 43；

3) No. two rotation driving outer oil pipes 1 of rotary table 48 rotate, the top that sealing flange briquetting roller 43 advances to outer oil pipe 1 It carries out rolling and forms sealing flange 16, sealing flange 16 is fitted closely with outer oil pipe lid 11；

4) driving of hydraulic drive mechanism 46 rolling channel forming wheel 45 rolls the outer surface processing rolling ditch 44 of outer oil pipe 1；

5) during rolling ditch 44 is molding, since the middle part to outer oil pipe 1 is tightened, so that the upper and lower ends of outer oil pipe 1 It is tensed to centre, increases the pretightning force of sealing flange 16, it is ensured that pressing force of the sealing flange 16 to outer oil pipe lid 11 and oil sealing 9.

The present invention makes compression valve structure valve opening circulate by limit salient point support limit piece, counterbalance spring and interior stream valve block High sensitivity, damper damping oil when Compression and Expansion is moved back and forth can be flowed back and forth between outer oil pipe and inner oil tube, be compensated Inner oil tube epicoele oil mass.For damper when doing Compression and Expansion movement, compressing valve system passes through books circulation aperture, valve opening circulation sensitivity Height compensates the function of inner oil tube epicoele oil mass to reach, and avoids damper and occurs middle and high ram compression contracting in Compression and Expansion movement The phenomenon that stroke idle running, distortion, as shown in Fig. 2, all without out when compression valve structure of the present invention shows function experiment to high speed 1.0m/s Existing compression travel idle running, distortion.

Inboard aperture in radial double straight hole structure is moved in the apertura lateralis range of work by the present invention, quotes processing mold The height (normal face be arranged positive recirculation hole) that is formed in the end face of piston only, low (reverse flow through-hole is arranged in inner concave) control Valve block valve opening state forms the piston of two-way concentric structure, reduces Piston Machining area, improves axial impact strength (radial crushing strength is increased to 59.2KN by original 22.28KN).The fastening face area on piston is increased, to increase spiral shell Line diameter provides the higher torque range (torque that the piston of radial double straight hole structure is born are as follows: 20N/M, and single straight The torque that pore structure piston is born are as follows: 50N/M).

Three hanging ring, Dustproof pipe lid and piston rod components are disposably completed to weld by the present invention.The resistance of this kind of technique production Buddhist nun's device piston-rod assembly protects piston rod not generate damage in process without the external force occurred in original process.By It ensure that the consistency of product using more accurately tooling (hanging ring tooling and Dustproof pipe lid tooling) in bottom.

The present invention using the outer surface of outer oil pipe roll ditch by the way of to being tightened in the middle part of outer oil pipe, to outer oil pipe Both ends generate one to intermediate tightening force, so that the pretightning force for increasing sealing flange (is pre-tightened in equivalent material thickness lower flange Power increases 50%-80%), it is ensured that sealing flange guarantees its leakproofness and stability to the pressing force of outer oil pipe lid and oil sealing, it is ensured that The normal smooth working of damper.

It should be understood that these examples are only for illustrating the present invention and are not intended to limit the scope of the present invention.In addition, it should also be understood that, After reading the content taught by the present invention, those skilled in the art can make various modifications or changes to the present invention, these Equivalent form is also fallen within the scope of the appended claims of the present application.