CN207539251U - A kind of oil-pressure damper - Google Patents

Abstract

The utility model provides a kind of oil-pressure damper, it is related to railway locomotive field, including oil storage cylinder, pressure cylinder is equipped in the oil storage cylinder, the pressure cylinder bottom is equipped with the bottom valve assembly for connecting pressure cylinder and oil storage cylinder, sliding is equipped with piston component in the pressure cylinder, the piston component includes piston, perforation is equipped with oil guiding hole in the piston, one end sliding is equipped with piston core valve in the oil guiding hole, piston spring is connected between the piston core valve and the oil guiding hole other end, the periphery wall of the piston core valve far from piston spring one end is equipped with stop block, cooperation is provided with position-arresting groove on the inner wall of the oil guiding hole, stop bit spring is equipped in the position-arresting groove, the stop bit spring is against stop block and position-arresting groove between the end of piston spring.The deformation of piston spring is limited while oil-pressure damper effectiveness in vibration suppression is ensured using the stop bit spring set in position-arresting groove and position-arresting groove, extends the service life of oil-pressure damper.

Description

A kind of oil-pressure damper

Technical field

The utility model is related to railway locomotive field, more particularly to a kind of oil-pressure damper.

Background technology

Locomotive is rolling stock with anti-snakelike, transverse direction, Vertical Hydraulic Damper Used oil-pressure damper（Diesel locomotive, electric power machine Vehicle）Railcar, Urban Light Rail Vehicles and highway large size passenger stock bogie（Vehicle bridge）Single stage suspension, secondary suspension dress The important damping component put is to form hydraulic damping power by stretching, compression piston bar back and forth movement to achieve the purpose that vibration damping, has Have good damping effect and flexible effectiveness in vibration suppression, be improve locomotive, vehicle high-speed traveling comfort, comfort, The critical component of safety.

At present, oil-pressure damper in the market generally releases energy by the deformation of spring with reply, so as to reach vibration damping Purpose；

For another example notification number is a kind of check valve of oil-pressure vibration reducer for railway of Chinese utility model patent of CN201221586Y, Including valve body (being also valve seat) and spool, the spool is a kind of reed-type valve core structure, shape can occur with itself by one kind Elastic valve plate and the door combination of change are formed, and for elastic valve plate between door and valve body, elastic valve plate can be in door and valve Between body, deformation is generated under the pressure effect of both sides.The opening and closing of check valve are become by the elastic valve plate of reed-type Shape is completed.Elastic valve plate is the coil component spring steel thin slice that one piece of thickness only has 0.2~0.25mm, have well elasticity and Anti- flexing fatigue.The action that check valve opens and closes by elastic valve plate both sides pressure differential, when valve body (valve body for piston or Bottom valve) side pressure be more than door side pressure when, elastic valve plate leaves valve body and is adjacent to door, the opened oil of check valve；Work as gear When lid lateral pressure is more than valve body lateral pressure, elastic valve plate leaves door and is adjacent to valve body, closed check valve.Using spring steel leaf generation For spring, reach the folding by check valve, the purpose to release energy.

Although spring or spring steel leaf can be released energy by deformation and reply, reduce vibration；But spring or During multiple excessively deformation and replying, the coefficient of elasticity of spring or spring steel leaf continuously decreases spring steel leaf, becomes Energy-absorbing effect is deteriorated while shape ability increases, and so as to reduce the effectiveness in vibration suppression of oil-pressure damper, and then has shortened oil pressure and has subtracted It shakes the service life of device.

Utility model content

The purpose of this utility model is to provide a kind of oil-pressure damper, can limit the deformation degree of piston spring, protection Piston spring, so as to extend the service life of oil-pressure damper.

The above-mentioned technical purpose of the utility model technical scheme is that：A kind of oil-pressure damper, Including oil storage cylinder, it is equipped with pressure cylinder in the oil storage cylinder, the pressure cylinder bottom is equipped with to connect pressure cylinder and oil storage cylinder Bottom valve assembly, in the pressure cylinder sliding be equipped with piston component, the piston component includes piston, penetrates through and be equipped in the piston Oil guiding hole, in the oil guiding hole one end sliding be equipped with piston core valve, be connected between the piston core valve and the oil guiding hole other end Piston spring, the periphery wall of the piston core valve far from piston spring one end is equipped with stop block, on the inner wall of the oil guiding hole Cooperation is provided with position-arresting groove, and stop bit spring is equipped in the position-arresting groove, and the stop bit spring is against stop block with position-arresting groove close to living Between the end for filling in spring.

By using above-mentioned technical proposal, oil-pressure damper is during the work time, especially larger in the active force being subject to, living At plug for fluid by space opened to the maximum when, even if pressure continues to increase, extrusion piston core valve, fluid by rate Increase, and supply fluid by space still maintain constant, at this point, there is extra deformation in piston spring, for a long time repeatedly Deformation can shorten the service life of piston spring, and deformation degree is bigger, and the speed shortened is faster；Therefore, in piston core valve Stop block and position-arresting groove are equipped on the internal perisporium of periphery wall and oil guiding hole, is set between stop block and the end of position-arresting groove Put upper piston spring, on the one hand, the setting of position-arresting groove can limit the shift length of piston core valve, so as to limit piston bullet The deformation degree of spring, on the other hand, stop bit spring setting can not only compensating piston spring partial deformation ability, ensure oil The damping capacity of pressure damper, moreover it is possible to cushioning effect be played to the connection of stop block and position-arresting groove, prevent stop block directly with stopping Hit the damping effect for influencing oil-pressure damper in position slot end.

Further, the piston core valve end is hollow setting, and the piston core valve is close to the end of piston spring The hollow part that piston core valve is connected on peripheral wall is provided with threaded hole.

By using above-mentioned technical proposal, by connecting work on the piston core valve of the hollow setting in end and piston core valve peripheral wall The threaded hole of core valve hollow part and oil guiding hole setting is filled in, threaded hole is in the slipping of piston core valve, the company with oil guiding hole The change rate smaller in logical space, controllability higher.

Further, the bottom valve assembly includes foot valve seat, and foot valve seat edge is provided with inlet valve in the foot valve seat And delivery valve.

By using above-mentioned technical proposal, bottom valve assembly includes foot valve seat, inlet valve and delivery valve is arranged on foot valve seat Marginal position；It avoids inlet valve and delivery valve is centrally-disposed, fluid can be prevented in disengaging inlet valve and fuel-displaced During valve, the range that fluid hits reflux with oil storage cylinder bottom is excessive, and influences the reflux of fluid；And fluid is by being arranged on When the inlet valve and delivery valve of edge, when fluid strikes oil storage cylinder bottom, most of fluid is first from the edge of foot valve seat Position flows into the gap between oil storage cylinder and pressure cylinder rather than stays in pushing away by follow-up fluid between foot valve seat and oil storage cylinder It pushes between oil storage cylinder and pressure cylinder, so as to make the reflux of fluid more smooth, improves the working efficiency of oil-pressure damper.

Further, the delivery valve includes the return port that perforation foot valve seat opens up, and the return port is far from piston component End, the internal perisporium of side close to foot valve seat axle center is obliquely installed, and inclined direction is directed away from bottom from foot valve seat axle center Valve shaft position is set.

By using above-mentioned technical proposal, there are return port, return port in end set of the delivery valve close to oil storage cylinder bottom It is obliquely installed towards the internal perisporium of foot valve seat edge side, when fluid enters oil storage cylinder from pressure cylinder by delivery valve, through interior The return port that peripheral wall is obliquely installed is directed at the gap of oil storage cylinder and pressure cylinder, and part fluid is avoided to strike oil storage cylinder bottom And influence the back-flow velocity of fluid.

Further, the inlet valve includes the fuel feed hole that perforation foot valve seat opens up, and is fixed with and is less than in the fuel feed hole The kidney-shaped plate of fuel feed hole setting, in the fuel feed hole sliding be equipped with into wick valve, it is described to include into wick valve along oil inlet hole length Direction sliding is plugged on the guide rod in kidney-shaped plate, and guide rod is connected with close to one end of piston and is connected at fuel feed hole port Baffle is equipped with oil inlet spring between end and kidney-shaped plate of the guide rod far from baffle.

By using above-mentioned technical proposal, inlet valve includes the fuel feed hole of perforation foot valve seat setting, is slid in inlet valve It is provided with into wick valve, is additionally provided with kidney-shaped plate in fuel feed hole, kidney-shaped plate and into oil inlet spring is equipped between wick valve passes through Pressure differential between oil storage cylinder and pressure cylinder is pushed to be slid into wick valve, generate for fluid by space, in compensation pressure cylinder The fluid of shortcoming.

Further, annular groove is provided on the kidney-shaped plate, the oil inlet Spring Card is in annular groove.

By using above-mentioned technical proposal, annular groove in setting, annular is stuck in by the end of oil inlet spring on kidney-shaped plate In slot, avoid oil inlet spring that the sliding and bending that deviate piston motion direction occur on kidney slot so that oil inlet spring subtracts Bestir oneself with being affected.

Further, the stepped setting in the edge of the baffle, the end cooperation of the fuel feed hole is equipped with stepped The oil-feed tank of setting.

By using above-mentioned technical proposal, the company of fuel feed hole and pressure cylinder is blocked using the baffle and oil-feed tank of ladder setting It is logical, it avoids after slight non-response permanent deformation is generated in oil inlet spring, baffle completely disengages fuel feed hole and subtracts oil pressure The device that shakes is ineffective.

Further, at the top of the foot valve seat and bottom is fitted with oil strain sponge, and fuel feeding is provided on the oil strain sponge Liquid passes through inlet valve and the relief hole of delivery valve.

By using above-mentioned technical proposal, fluid can generate a large amount of bubble and shape when at a terrific speed by gap Into foam so that fluid has compressibility, so as to reduce the effectiveness in vibration suppression of oil-pressure damper；It is set at the top and bottom of foot valve seat Oil strain sponge is put, absorbs the part bubble generated in fluid, ensures oil-pressure damper in piston faster reciprocal motion, oil pressure The effectiveness in vibration suppression of damper will not be reduced excessively, so that losing damping effect.

In conclusion the utility model has the advantages that：

1. stop block and position-arresting groove and the stop bit spring being arranged in position-arresting groove by setting, are ensureing effectiveness in vibration suppression Meanwhile the deformation degree of piston spring is limited, to extend the service life of oil-pressure damper.

Description of the drawings

Fig. 1 is a kind of overall structure diagram of oil-pressure damper of the utility model；

Fig. 2 is the sectional view of oil-pressure damper；

Fig. 3 is the enlarged drawing of part A in Fig. 2；

Fig. 4 is the enlarged drawing of C portion in Fig. 3；

Fig. 5 is the overall structure diagram of bottom valve assembly；

Fig. 6 is the enlarged drawing of part B in Fig. 2；

Fig. 7 is the overall structure diagram of kidney-shaped plate.

In figure, 1, oil-pressure damper；11st, oil storage cylinder；12nd, pressure cylinder；2nd, piston component；21st, piston；22nd, oil guiding hole； 221st, adjustment seat；2211st, position-arresting groove；2212nd, stop bit spring；222nd, piston core valve；2221st, threaded hole；2222nd, stop block； 223rd, piston spring；3rd, bottom valve assembly；31st, foot valve seat；32nd, inlet valve；320th, fuel feed hole；321st, into wick valve；3211st, it is oriented to Bar；3212nd, baffle；322nd, kidney-shaped plate；3221st, through-hole；3222nd, annular groove；323rd, oil-feed tank；324th, oil inlet spring；33rd, it is fuel-displaced Valve；331st, return port；34th, oil strain sponge；341st, relief hole.

Specific embodiment

The utility model is described in further detail below in conjunction with attached drawing.

Embodiment：A kind of oil-pressure damper, as shown in Figures 1 to 4, the oil storage cylinder 11 including cylindrical setting is storing up Pressure cylinder 12 is provided in oil cylinder 11, and 12 end set of pressure cylinder has the bottom valve assembly 3 connected into oil storage cylinder 11, in pressure cylinder The sliding of 12 length direction of pressure cylinder is provided with piston component 2 in 12, fluid is housed in pressure cylinder 12 and oil storage cylinder 11；Piston Component 2 includes the piston 21 that piston rod and piston rod are set close to 3 one end of bottom valve assembly, is penetrated through in piston 21 and is provided with multiple lead Oilhole 22 in 22 one end end of oil guiding hole equipped with adjustment seat 221, is set in adjustment seat 221 along the sliding of 22 length direction of oil guiding hole Piston core valve 222 is equipped with, piston spring 223 is cased with outside 222 one end of piston core valve, 223 one end of piston spring abuts oil guiding hole 22 ends, the other end are connected to 221 end of adjustment seat；In piston core valve 222 and 221 contact site of adjustment seat along piston core valve 222 glide directions are connected with stop block 2222, and position-arresting groove 2211, position-arresting groove are equipped on the internal perisporium of adjustment seat 221 2211 are provided with stop bit spring 2212 between the end of piston spring 223 and stop block 2222.

In this way, oil-pressure damper 1, after stress, piston 21 starts to move back and forth in pressure cylinder 12, with piston 21 It moves back and forth, being arranged on piston core valve 222 on piston 21 presses 223 deformation of piston spring, open-minded on piston core valve 222 so as to make Oilhole leave the adjustment seat 221 of fitting, so as to enable fluid by oilhole, in the two chambers and oil storage cylinder of pressure cylinder 12 It is flowed in 11；Stress is bigger, and 21 movement velocity of piston is faster, and the deformation degree bigger of piston spring 223, deformation number increases, It is increased sufficiently to greatly in order to avoid working as pressure, when oilhole part completely disengages adjustment seat 221, piston spring 223 continues deformation, production Raw extra deformation quantity and the service life for reducing piston spring 223, in the periphery wall and adjustment seat 221 of piston core valve 222 Cooperation is provided with stop block 2222 and position-arresting groove 2211 on peripheral wall, utilizes the stop bit spring that stop block 2222 is resisted in position-arresting groove 2211 2212, piston core valve 222 can not only be resisted after oilhole completely disengages adjustment seat 221, piston spring 223 is avoided to continue to press Contracting, moreover it is possible to extra active force is absorbed instead of piston spring 223, to eliminate vibration.

Oil-pressure damper 1 is modulated in order to facilitate staff, as shown in figure 3, the 222 hollow setting of piston core valve, and peripheral wall On be provided with the threaded hole 2221 connected into hollow part.In this way, by turning bolt in adjustment seat 221 and being set in shape of threads The different degrees of deformation of 2221 regulating piston spring 223 of threaded hole when, threaded hole 2221 allow fluid by space size Difference, so as to adjust the range of the vibration frequency of the adaptation of oil-pressure damper 1.

In order to facilitate reflux of the fluid between oil storage cylinder 11 and pressure cylinder 12, as shown in Figure 2 and Figure 5, bottom valve assembly 3 wraps Include the foot valve seat 31 for being arranged on 12 bottom end of pressure cylinder, 31 cylindrical setting of foot valve seat, and around foot valve seat 31 in foot valve seat 31 Peripheral wall is provided with inlet valve 32 and delivery valve 33.Here, inlet valve 32 is set as one, and delivery valve 33 is set as three.It in this way, will 33 eccentric setting of inlet valve 32 and delivery valve, and the edge of foot valve seat 31 is arranged on, fluid is entering oil storage from pressure cylinder 12 During cylinder 11, if delivery valve 33 to be arranged on to the center of foot valve seat 31, fluid impinges upon 11 bottom of oil storage cylinder, and is arranged with follow-up The fluid gone out generates collision, and then influences the reflux of fluid；And the inlet valve 32 of marginal position and delivery valve 33 are arranged on, greatly Part fluid is flowed directly into the gap between oil storage cylinder 11 and pressure cylinder 12 between peripheral wall, reduces the resistance encountered during flowing Power, vice versa.

Enter oil storage cylinder 11 from delivery valve 33 to further facilitate fluid, as shown in Figure 2 and Figure 6, delivery valve 33 wraps The return port 331 that perforation foot valve seat 31 is set is included, and internal perisporium of the return port 331 far from 21 one end of piston is provided with inclined surface, And inclined surface is arranged on return port 331 close to the side in 31 axle center of foot valve seat, here, inclined direction is set as return port 331 and leads The direction far from 31 axle center of foot valve seat is flowed to fluid from return port to set.

In order to promote the leakproofness of inlet valve 32, as shown in Fig. 2 and Fig. 5 to Fig. 7, inlet valve 32 includes perforation foot valve seat 31 The fuel feed hole 320 of setting is fixed with diameter in fuel feed hole 320 and is less than the kidney-shaped plate 322 that fuel feed hole 320 is set, in kidney-shaped plate Through-hole 3221 is provided in 322, is inserted in through-hole 3221 into wick valve 321；Fuel feed hole 320 is arranged on into the sliding of wick valve 321 In, and the T-shaped setting in section, include guide rod 3211 into wick valve 321 and be connected to the in the form of annular discs of 3211 end of guide rod The baffle 3212 of setting is cased with oil inlet spring 324 in the end of the separate baffle 3212 of guide rod 3211, is leaned in kidney-shaped plate 322 Nearly 324 side of oil inlet spring is provided with annular groove 3222, and oil inlet spring 324 is connected in annular groove 3222；The edge of baffle 3212 Locate stepped setting, and the part of fuel feed hole 320 and the fitting of 3212 peripheral wall of baffle be equipped with stepped setting into Oil groove 323.In this way, even if 324 coefficient of elasticity of oil inlet spring reduces, the non-response deformation in part is generated, baffle 3212 remains to Isolation oil storage cylinder 11 is connected with pressure cylinder 12.

The bubble generated when quickly being moved to cut down piston 21, in fluid, as shown in Figure 5 and Figure 6, in foot valve seat 31 Top and bottom fitting is provided with oil strain sponge 34, and be provided on oil strain sponge 34 and pass through inlet valve 32 and delivery valve 33 for fluid Relief hole 341.The part foam in fluid is sponged using oil strain sponge 34, reduces the compressibility of fluid, ensures oil pressure The effectiveness in vibration suppression of damper 1.

The above is only the preferred embodiment of the utility model, and the scope of protection of the utility model is not limited merely to Above-described embodiment, all technical solutions belonged under the utility model thinking belong to the scope of protection of the utility model.It should refer to Go out, for those skilled in the art, several improvement under the premise of the utility model principle is not departed from and Retouching, these improvements and modifications also should be regarded as the scope of protection of the utility model.

Claims (8)

1. a kind of oil-pressure damper, including oil storage cylinder（11）, the oil storage cylinder（11）It is interior to be equipped with pressure cylinder（12）, the pressure cylinder （12）Bottom is equipped with to connect pressure cylinder（12）And oil storage cylinder（11）Bottom valve assembly（3）, the pressure cylinder（12）Middle sliding Equipped with piston component（2）, it is characterised in that：The piston component（2）Including piston（21）, the piston（21）Middle perforation is equipped with Oil guiding hole（22）, the oil guiding hole（22）Middle one end sliding is equipped with piston core valve（222）, the piston core valve（222）With Oil Guide Hole（22）Piston spring is connected between the other end（223）, the piston core valve（222）Far from piston spring（223）One end Periphery wall is equipped with stop block（2222）, the oil guiding hole（22）Inner wall on cooperation be provided with position-arresting groove（2211）, the stop bit Slot（2211）In be equipped with stop bit spring（2212）, the stop bit spring（2212）It is against stop block（2222）With position-arresting groove（2211） Close to piston spring（223）End between.

2. a kind of oil-pressure damper according to claim 1, it is characterised in that：The piston core valve（222）During end is Sky setting, the piston core valve（222）Close to piston spring（223）End peripheral wall on connect piston core valve（222）In Empty position is provided with threaded hole（2221）.

3. a kind of oil-pressure damper according to claim 1, it is characterised in that：The bottom valve assembly（3）Including foot valve seat （31）, the foot valve seat（31）In around foot valve seat（31）Edge is provided with inlet valve（32）And delivery valve（33）.

4. a kind of oil-pressure damper according to claim 3, it is characterised in that：The delivery valve（33）Including penetrating through bottom valve Seat（31）The return port opened up（331）, the return port（331）Far from piston component（2）End, close to foot valve seat（31）Axis The internal perisporium of the side of the heart is obliquely installed, and inclined direction is from foot valve seat（31）Center is directed away from foot valve seat（31）Shaft core position Setting.

5. a kind of oil-pressure damper according to claim 3, it is characterised in that：The inlet valve（32）Including penetrating through bottom valve Seat（31）The fuel feed hole opened up（320）, the fuel feed hole（320）In be fixed with less than fuel feed hole（320）The kidney-shaped plate of setting （322）, the fuel feed hole（320）Middle sliding is equipped with into wick valve（321）, it is described into wick valve（321）Including along fuel feed hole （320）Length direction sliding is plugged on kidney-shaped plate（322）In guide rod（3211）, guide rod（3211）Close to piston（21）'s One end, which is connected with, is connected to fuel feed hole（320）Baffle at port（3212）, the guide rod（3211）Far from baffle（3212） End and kidney-shaped plate（322）Between be equipped with oil inlet spring（324）.

6. a kind of oil-pressure damper according to claim 5, it is characterised in that：The kidney-shaped plate（322）On be provided with annular Slot（3222）, the oil inlet spring（324）It is stuck in annular groove（3222）In.

7. a kind of oil-pressure damper according to claim 6, it is characterised in that：The baffle（3212）Edge be in ladder Shape is set, the fuel feed hole（320）End cooperation equipped with stepped setting oil-feed tank（323）.

8. according to a kind of oil-pressure damper described in claim 3, it is characterised in that：The foot valve seat（31）Top and bottom fitting Equipped with oil strain sponge（34）, the oil strain sponge（34）On be provided with and pass through inlet valve for fluid（32）And delivery valve（33）Resigning Hole（341）.