CN102294945A - Automobile air suspension damping device - Google Patents
Automobile air suspension damping device Download PDFInfo
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- CN102294945A CN102294945A CN2010102104844A CN201010210484A CN102294945A CN 102294945 A CN102294945 A CN 102294945A CN 2010102104844 A CN2010102104844 A CN 2010102104844A CN 201010210484 A CN201010210484 A CN 201010210484A CN 102294945 A CN102294945 A CN 102294945A
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Abstract
The invention discloses an automobile air suspension damping device. The automobile air suspension damping device is composed of a piston suspension damping device, a boosting bearing piston device and a gas supply device. The piston suspension damping device is composed of a piston rod, a piston and a piston cylinder; the boosting bearing piston device comprises a boosting piston cylinder and a boosting piston, and the gas supply device comprises a gas inlet pipe, a gas outlet pipe, a gas pump and a gas storage cylinder, the gas inlet pipe and the gas outlet pipe are all communicated with the gas pump and the gas storage cylinder, and the gas pump is communicated with the gas storage cylinder. For an air suspension in the invention, a piston structure is adopted and is boosted through the secondary boosting and the bearing piston, liquid-gas pressure conversion is adopted to greatly reduce the damping area of the air suspension, accordingly, the lifting amplitude is random and controllable, the work is stable, and higher work pressure can be obtained by only using lower support original pressure, and thus the real full air suspension is realized, the wide spread and mounting of the air suspension is realized, and the stationarity and comfortableness of the driving automobile can be obviously improved. The automobile air suspension damping device has a simple structure and lower cost.
Description
Technical field
The invention belongs to vehicle suspension, specifically, relate to a kind of vehicle air suspension shock absorption device that is provided with piston cylinder.
Background technology
The function of vehicle suspension shock absorption device is to reduce the not good vibration that causes of road conditions, and vehicle body rocks when alleviating car sharply turning or sudden stop simultaneously.The air-suspended type shock absorption device is low with its rigidity, and rigidity is non-linear, scalable, air suspension adjustable height, light weight, low noise advantages.Be applied in more and more widely on the various vehicles, on particularly senior motorcoach and the accurate load-carrying vehicle, simultaneously, the application quantity of air suspension on luxurious cross country car is also in rapid rising, and the part car also begins used for installing air suspension gradually.At some special vehiclees, as to shockproof measuring truck of having relatively high expectations, medical truck, extraordinary military car and require Height Adjustable container lorry etc., air suspension is almost unique selection.At present the vehicle air suspension shock absorption device mainly is to be elastic element with the rubber pneumatic bag spring, utilizes the compressibility of gas to realize its elastic reaction.But the shortcoming that the vehicle suspension shock absorption device of this kind structure exists is:
1, air bag spring size is big.Because air bag spring size is very big, on car, mid-get car, arrange very difficulty, the air bellow that especially can't guarantee both sides on the layout of dependent suspension has bigger width between centers, thereby makes suspension lateral angle rigidity less, necessary device lateral stabiliser; The excessive size of air bag spring installs on car and mid-get car that to use difficulty big especially, must carry out corresponding comprehensively design to vehicle frame, therefore unfavorable with extensively promote.
2, field of application is narrow.Air suspension is because the origin pressure that vehicle provides is limited, generally (＜0.85MPa), therefore air bag size that must be bigger, add the load-carrying capacity restriction of upper gasbag spring, increase along with load carrying ability, air bag spring size also can increase thereupon, promotes the use so general run of thins is difficult on lorry or the ultra-large type transport vehicle.
3, dangerous big.The air bag spring is by the decision of rubber material, in case be corroded aging or the superpressure damage, vehicle will completely lose damping performance and occur dangerous.
4, complex structure.The air bag spring can only bear vertical load, corresponding guiding mechanism must be set to bear transverse force, longitudinal force and moment, and the vehicle balance adjustment need complicated electronic induction balanced system be handled, thereby the cost height.
5, heave amplitude is little.The air bag spring is because of the restriction of material-structure own, and the adjusting on heave amplitude can not design very greatly, so be very restricted in the lift adjustment design of vehicle.
Summary of the invention
The object of the present invention is to provide that a kind of size is little, pressure-bearing is big, heave amplitude is big, and the air suspension shock absorption device of working stability, simple in structure, applied range.
Technical scheme of the present invention is as follows: the vehicle air suspension shock absorption device, it is characterized in that: constitute by piston suspension shock absorption device, supercharging loading piston device and gas feeder three parts, described piston suspension shock absorption device comprises piston rod, piston and piston cylinder, described piston-rod lower end connects described piston, stretch out outside the described piston cylinder upper end, be provided with conduit in the piston cylinder chamber below described piston, this conduit stretches out outside the described piston cylinder; Described supercharging loading piston device comprises charged piston cylinder and charged piston, described charged piston cylinder is made of the big cylinder that communicates and stingy cylinder two parts, accordingly, what cooperate with big cylinder is big piston, what cooperate with stingy cylinder is valve piston, link together by pipe link between described big piston and the valve piston, be provided with air inlet pipe and freeing pipe in the big cylinder above described big piston, be provided with conduit in the little cylinder below described valve piston, this conduit is communicated with conduit on the described piston cylinder, is liquid in the cavity between described valve piston and the described piston; Described gas feeder comprises air inlet pipe, freeing pipe, air pump and air reservoir, and described air inlet pipe and freeing pipe all communicate with described air pump and air reservoir, and described air pump communicates with air reservoir.This device is piston structure, by two stage supercharging and loading piston supercharging, and adopt the conversion of liquid gas pressure power, make air suspension damping volume significantly dwindle, heave amplitude is arbitrarily controlled, working stability, and only needs lower support origin pressure can obtain higher operation pressure.
On described air suspension shock absorption device, be provided with height limit induction device, on described air inlet pipe and freeing pipe, be provided with electromagnetic valve.Control electromagnetic valve switch on air inlet pipe and the freeing pipe by height limit induction device, thus the air pressure of adjusting piston cylinder, and then guarantee the height of vehicle frame or vehicle body.
Described height limit induction device comprises synchronous plate, induction rod, sleeve, induction bulb and spring, the upper end of described induction rod is connected with described piston rod by synchronous plate, the lower end is stretched in the described sleeve, inwall at sleeve laterally is provided with groove, in the bottom of this groove described spring is installed, the front end of described spring connects described induction bulb, and described induction bulb stretches in the chamber of described sleeve.This kind height limit induction device is simple in structure, and function-stable has guaranteed the vehicle frame of vehicle under different pressures or the height of vehicle body well.
Between stingy cylinder cavity below the described valve piston and described conduit, be provided with dash pot valve.Dash pot valve can be controlled the flowing velocity of buffering liquid, reduces concavo-convex road surface to the direct impact of vehicle body and the abrupt release bounce-back of pressure gas, makes vehicle ' more smooth-going.
Junction at described big cylinder and little cylinder is provided with guide piece, and described guide piece is center and all porose all around plate object, and described pipe link passes the centre hole of described guide piece.Guide piece can guarantee the straight-line motion of pipe link, and porous is beneficial to the gas free-flowing of big or small piston space, with the free motion of assurance piston energy, and realizes supercharging and transformation of energy.
Described air reservoir is intermediate pressure cylinder and low pressure cylinder two cylinder sleeve assembling structures, and described intermediate pressure cylinder is installed in the low pressure cylinder, and described low pressure cylinder communicates with the gentle pump steam inlet of described freeing pipe, and described intermediate pressure cylinder communicates with the gentle gas port that pumps of described air inlet pipe.Two cylinder sleeve assembling structures can reduce vehicle origin pressure, form two stage supercharging, are saving in energy like this, have reduced the suffered pressure of middle pressure air reservoir again, have prolonged service life of air reservoir and safe in utilization.
Between described freeing pipe and air reservoir, get around electromagnetic valve and be provided with switch, so that cylinder and air reservoir are carried out initial stage pressurization and air pressure adjustment maintenance.
Connect right little synchronous plate on right wheel sleeve top, below the little synchronous plate other end in the described right side, connect right dummy piston bar, the lower end of described right dummy piston bar connects right dummy piston, described right dummy piston is set in the right dummy piston cylinder, described right dummy piston cylinder bottom is provided with right balance pipe and communicates with right piston cylinder cylinder chamber, the described right balance tracheae other end stretches in the right adjusting piston cylinder, in the described right adjusting piston cylinder right adjusting piston is arranged, described right adjusting piston links to each other with left adjusting piston in the left adjusting piston cylinder by the adjusting piston post, described left adjusting piston cylinder left end is provided with left balance pipe, described left balance pipe communicates with left dummy piston cylinder, in described left dummy piston cylinder, be provided with left dummy piston, above described left dummy piston, be provided with left dummy piston bar, the upper end of described left dummy piston bar connects left little synchronous plate, and the little synchronous plate in a described left side is connected with revolver sleeve top.On described right adjusting piston cylinder and left adjusting piston cylinder, be provided with locating plate, on described locating plate, be provided with brake plate, described brake plate is connected with adjusting piston post synchro, described adjusting piston post synchro is captiveed joint with the adjusting piston post, its other end is connected with synchronous electromagnetic connector, and the synchronous electromagnetic connector of described direction is arranged on the direction lever.This device rotates synchronously with direction lever, makes Ackermann steer angle outside bumper raise, and inboard bumper reduces, thereby makes Ackermann steer angle reach centrifugal balance.
The upper end of described piston rod is provided with screw thread.To make things convenient for being connected of piston rod and vehicle frame or vehicle body.
Beneficial effect: in the present invention, air suspension adopts piston structure, by two stage supercharging and loading piston supercharging, and employing liquid gas pressure power conversion, make air suspension damping volume significantly dwindle, heave amplitude is arbitrarily controlled, working stability, only need lower support origin pressure can obtain higher operation pressure, has realized full air suspension truly, make air suspension extensively promote and be mounted for reality, vehicle ' stationarity and traveling comfort can be significantly improved.And the present invention is simple in structure, and cost is lower.
Description of drawings
Fig. 1 is a constructional drawing of the present invention.
Fig. 2 is centrifugal balance regulator mechanism map.
The specific embodiment
The invention will be further described below in conjunction with drawings and Examples:
The vehicle air suspension shock absorption device, as shown in Figure 1, it is characterized in that: constitute by piston suspension shock absorption device, supercharging loading piston device and gas feeder three parts, piston suspension shock absorption device is made up of piston rod 1, piston 2 and piston cylinder 3, upper end at piston rod 1 is processed with screw thread, connects piston 2 in piston rod 1 lower end, and stretch out outside the piston cylinder 3 its upper end, be provided with conduit 19 in piston cylinder 3 chambeies below piston 2, this conduit 19 stretches out outside the piston cylinder 3.Piston rod 1 is connected with induction rod 14 upper ends by synchronous plate 13, induction rod 14 lower ends are stretched in the sleeve 15, inwall at sleeve 15 laterally is provided with two grooves, the equal mounting spring 17 in the bottom of two grooves, the front end of spring 17 all connects induction bulb 16, and induction bulb 16 stretches in the chamber of described sleeve 15.Supercharging loading piston device is made up of charged piston cylinder and charged piston, the charged piston cylinder is made of the big cylinder 4 that communicates and stingy cylinder 5 two parts, accordingly, what cooperate with big cylinder 4 is big piston 6, what cooperate with stingy cylinder 5 is valve piston 7, link together by pipe link 8 between big piston 6 and the valve piston 7, become one, realize being synchronized with the movement.Junction at big cylinder 4 and stingy cylinder 5 is provided with guide piece 24, and guide piece 24 is center and all porose all around metal circular plate object, and pipe link 8 passes the centre hole of described guide piece 24.Be provided with air inlet pipe 9 and freeing pipe 10 in the big cylinder 4 above big piston 6, on air inlet pipe 9 and freeing pipe 10, be provided with electromagnetic valve 12, switch 23 also is installed on freeing pipe 10.Be provided with conduit 20 in the stingy cylinder 5 below valve piston 7, be provided with dash pot valve 18 between stingy cylinder 5 cavitys and conduit 20, this conduit 20 passes through soft pipe connection with described conduit 19.Gas feeder is made up of air inlet pipe 9, freeing pipe 10, air pump 11, intermediate pressure cylinder 21 and low pressure cylinder 22, intermediate pressure cylinder 21 is installed in the low pressure cylinder (22), low pressure cylinder 22 communicates with freeing pipe 10 and air pump 11 admission ports, and intermediate pressure cylinder 21 communicates with air inlet pipe 9 and air pump 11 air extractor ducts.
More than be the air suspension shock absorption device on the vehicle one right wheel A, with the cooresponding revolver B of right side wheel A, and the piston suspension shock absorption device on other wheel is identical with supercharging loading piston apparatus structure, all shared gas feeder of all wheels.
As shown in Figure 2, connect right little synchronous plate 37a on right wheel sleeve 15a top, right little synchronous plate 37a goes up porose, induction rod 14 passes from the hole, below the little synchronous plate 37a other end of the right side, connect right dummy piston bar 25a, the lower end of right dummy piston bar 25a connects right dummy piston 26a, right dummy piston 26a is sleeved in the right dummy piston cylinder 27a, right dummy piston cylinder 27 bottoms meet right balance pipe 28a and communicate with right piston cylinder 27a cylinder chamber, the right balance tracheae 28a other end stretches in the right adjusting piston cylinder 29a chamber, in the right adjusting piston cylinder 29a right adjusting piston 30a is installed, right adjusting piston 30a links to each other with left adjusting piston 30b in the left adjusting piston cylinder 29b by adjusting piston post 31, left side adjusting piston cylinder 29b left end connects left balance pipe 28b, left side balance pipe 28b communicates with left dummy piston cylinder 27b, left dummy piston 26b is installed in left dummy piston cylinder 27b, above left dummy piston 26b, connect left dummy piston bar 25b, the upper end of left side dummy piston bar 25b connects left little synchronous plate 37b, and left little synchronous plate 37b is connected with revolver sleeve 15b top.Intrinsic locating plate 32 on right adjusting piston cylinder 29a and left adjusting piston cylinder 29b, suit brake plate 33 on locating plate 32, brake plate 33 is connected with adjusting piston post synchro 34, adjusting piston post synchro 34 is captiveed joint with adjusting piston post 31, its other end is connected with synchronous electromagnetic connector 35, and electromagnetic connector 35 is sleeved on the direction synchronizing bar 36 synchronously.
When pressure stability, between the two induction bulbs 16, piston rod 1 was in certain position, keeps the vehicle body certain height about induction rod 14 tops were in.When the suspension pressure increases, piston rod 1 moves down, driving induction rod 14 by synchronous plate 13 moves down, induction bulb 16 is down touched on induction rod 14 tops, the electromagnetic valve of responding to down on the bulb 16 control air inlet pipes 9 12 is opened, and high pressure gas just come out in air inlet pipe 9 enters big cylinder 4 from intermediate pressure cylinder 21, promote big piston 6, big piston 6 is passed to valve piston 7 by pipe link 8 with pressure, has realized supercharging.The liquid that valve piston 7 promotes in stingy cylinder 5 chambeies, liquid passes to piston 2 with pressure, and top piston rod 1 induction bulb 16 under induction rod 14 breaks away from is closed electromagnetic valve 12 and is made the original height of vehicle body recovery on the piston 2.When the suspension pressure reduces, move on the piston rod 1, driving induction rod 14 by synchronous plate 13 moves up, induction bulb 16 is unclamped on induction rod 14 tops, on the electromagnetic valve 12 responded on the bulb 16 control freeing pipes 10 open, the relatively high pressure gases in the big cylinder 4 partly enter low pressure cylinder 22, big piston 6 step-downs are moved, move thereby drive valve piston 7, piston 2 moves down, and drives piston rod 1 and moves down to break away from up to induction rod 14 and go up induction bulb 16 and close electromagnetic valve 12 and make vehicle body recover original height.
Work as Ackermann steer angle, driver's steering wheel rotation, make direction synchronizing bar 36 horizontal motions, direction synchronizing bar 36 drives 34 motions of adjusting piston post synchro, adjusting piston post synchro 34 drives 31 motions of adjusting piston post, adjusting piston post 31 makes left, right adjusting piston (30b, 30a) motion, a left side, right adjusting piston (30b, a 30a) feasible left side, right dummy piston (26b, 26a) opposite up and down oppositely mobile, by a left side, right dummy piston bar (25b, 25a) and, right little synchronous plate (37b, 37a) drive a left side, right sleeve 15 moves up and down, thereby make the relative position between left and right sides sleeve 15 and the left and right sides induction rod 14 change, make an outside bumper reduce, inboard bumper raises, outside height equates to reach substantially in the Ackermann steer angle thereby make, and has improved the traveling comfort that the passenger rides and the traffic safety of vehicle.
Claims (9)
1. vehicle air suspension shock absorption device, it is characterized in that: constitute by piston suspension shock absorption device, supercharging loading piston device and gas feeder three parts, described piston suspension shock absorption device comprises piston rod (1), piston (2) and piston cylinder (3), described piston rod (1) lower end connects described piston (2), stretch out outside the described piston cylinder (3) upper end, be provided with conduit (19) in piston cylinder (3) chamber of described piston (2) below, this conduit (19) stretches out outside the described piston cylinder (3); Described supercharging loading piston device comprises charged piston cylinder and charged piston, described charged piston cylinder is made of the big cylinder (4) that communicates and little cylinder (5) two parts, accordingly, what cooperate with big cylinder (4) is big piston (6), what cooperate with little cylinder (5) is valve piston (7), link together by pipe link (8) between described big piston (6) and the valve piston (7), in the big cylinder (4) of described big piston (6) top, be provided with air inlet pipe (9) and freeing pipe (10), be provided with conduit (20) in the little cylinder (5) of described valve piston (7) below, this conduit (20) is communicated with described conduit (19); Described gas feeder comprises air inlet pipe (9), freeing pipe (10), air pump (11) and air reservoir, and described air inlet pipe (9) and freeing pipe (10) all communicate with described air pump (11) and air reservoir, and described air pump (11) communicates with air reservoir.
2. vehicle air suspension shock absorption device according to claim 1 is characterized in that: be provided with height limit induction device on described air suspension shock absorption device, be provided with electromagnetic valve (12) on described air inlet pipe (9) and freeing pipe (10).
3. vehicle air suspension shock absorption device according to claim 2, it is characterized in that: described height limit induction device comprises synchronous plate (13), induction rod (14), sleeve (15), induction bulb (16) and spring (17), the upper end of described induction rod (14) is connected with described piston rod (1) by synchronous plate (13), the lower end is stretched in the described sleeve (15), inwall at sleeve (15) laterally is provided with groove, described spring (17) is installed in the bottom of this groove, the front end of described spring (17) connects described induction bulb (16), and described induction bulb (16) stretches in the chamber of described sleeve (15).
4. vehicle air suspension shock absorption device according to claim 1 is characterized in that: be provided with dash pot valve (18) between little cylinder (5) cavity below described valve piston (7) and the described conduit (20).
5. vehicle air suspension shock absorption device according to claim 1, it is characterized in that: the junction at described big cylinder (4) and little cylinder (5) is provided with guide piece (24), described guide piece (24) is center and all porose all around plate object, and described pipe link (8) passes the centre hole of described guide piece (24).
6. vehicle air suspension shock absorption device according to claim 1, it is characterized in that: described air reservoir is intermediate pressure cylinder (21) and low pressure cylinder (22) two cylinder sleeve assembling structures, described intermediate pressure cylinder (21) is installed in the low pressure cylinder (22), described low pressure cylinder (22) communicates with described freeing pipe (10) and air pump (11) admission port, and described intermediate pressure cylinder (21) communicates with described air inlet pipe (9) and air pump (11) air extractor duct.
7. vehicle air suspension shock absorption device according to claim 1 is characterized in that: be provided with switch (23) on described freeing pipe (10).
8. vehicle air suspension shock absorption device according to claim 1, it is characterized in that: connect right little synchronous plate (37a) on right wheel sleeve (15a) top, below at the little synchronous plate in the described right side (37a) other end connects right dummy piston bar (25a), the lower end of described right dummy piston bar (25a) connects right dummy piston (26a), described right dummy piston (26a) is set in the right dummy piston cylinder (27a), described right dummy piston cylinder (27a) bottom is provided with right balance pipe (28a) and communicates with right piston cylinder (27a) cylinder chamber, described right balance tracheae (28a) other end stretches in the right adjusting piston cylinder (29a), right adjusting piston (30a) is arranged in the described right adjusting piston cylinder (29a), described right dummy piston (30a) links to each other by the interior left adjusting piston (30b) of adjusting piston post (31) and left adjusting piston cylinder (29b), described left adjusting piston cylinder (29b) left end is provided with left balance pipe (28b), described left balance pipe (28b) communicates with left dummy piston cylinder (27b), in described left dummy piston cylinder (27b), be provided with left dummy piston (26b), be provided with left dummy piston bar (25b) in the top of described left dummy piston (26b), the upper end of described left dummy piston bar (25b) connects left little synchronous plate (37b), and the little synchronous plate in a described left side (37b) is connected with revolver sleeve (15b) top.On described right adjusting piston cylinder (29a) and left adjusting piston cylinder (29b), be provided with locating plate (32), on described locating plate (32), be provided with brake plate (33), described brake plate (33) is connected with piston boit synchro (34), described piston boit synchro (34) is captiveed joint with adjusting piston post (31), its other end is connected with synchronous electromagnetic connector (35), and the synchronous electromagnetic connector of described direction (35) is arranged on the direction synchronizing bar (36).
9. vehicle air suspension shock absorption device according to claim 1 is characterized in that: the upper end of described piston rod (1) is provided with screw thread.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010210484 CN102294945B (en) | 2010-06-25 | 2010-06-25 | Automobile air suspension damping device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010210484 CN102294945B (en) | 2010-06-25 | 2010-06-25 | Automobile air suspension damping device |
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| Publication Number | Publication Date |
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| CN102294945A true CN102294945A (en) | 2011-12-28 |
| CN102294945B CN102294945B (en) | 2013-06-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201010210484 Expired - Fee Related CN102294945B (en) | 2010-06-25 | 2010-06-25 | Automobile air suspension damping device |
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| CN (1) | CN102294945B (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104417304A (en) * | 2013-08-22 | 2015-03-18 | 通用汽车环球科技运作有限责任公司 | Vehicle suspension system and method of controlling vehicle suspension system |
| CN106122354A (en) * | 2016-08-12 | 2016-11-16 | 浙江工业大学 | A kind of brake cylinder that sun wing plate erecting by overhang is carried out brake buffering |
| CN108030990A (en) * | 2018-01-22 | 2018-05-15 | 成都菲斯普科技有限公司 | A kind of internal medicine oxygen uptake suction sputum integral type medical treatment and nursing device |
| CN110831793A (en) * | 2017-07-07 | 2020-02-21 | 大陆-特韦斯贸易合伙股份公司及两合公司 | Air spring strut with sealed closure cap |
| CN112196933A (en) * | 2019-07-08 | 2021-01-08 | 张金海 | Shock absorption and buffering device |
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| DE3902743C1 (en) * | 1989-01-31 | 1990-07-26 | Daimler-Benz Aktiengesellschaft, 7000 Stuttgart, De | Active wheel or axle support |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104417304A (en) * | 2013-08-22 | 2015-03-18 | 通用汽车环球科技运作有限责任公司 | Vehicle suspension system and method of controlling vehicle suspension system |
| CN104417304B (en) * | 2013-08-22 | 2017-04-12 | 通用汽车环球科技运作有限责任公司 | Vehicle suspension system and method of controlling vehicle suspension system |
| CN106122354A (en) * | 2016-08-12 | 2016-11-16 | 浙江工业大学 | A kind of brake cylinder that sun wing plate erecting by overhang is carried out brake buffering |
| CN106122354B (en) * | 2016-08-12 | 2018-01-05 | 浙江工业大学 | A kind of brake cylinder that brake buffering is carried out to sun wing plate erecting by overhang |
| CN110831793A (en) * | 2017-07-07 | 2020-02-21 | 大陆-特韦斯贸易合伙股份公司及两合公司 | Air spring strut with sealed closure cap |
| CN110831793B (en) * | 2017-07-07 | 2023-04-18 | 大陆汽车科技有限公司 | Air spring strut with sealed closure cap |
| CN108030990A (en) * | 2018-01-22 | 2018-05-15 | 成都菲斯普科技有限公司 | A kind of internal medicine oxygen uptake suction sputum integral type medical treatment and nursing device |
| CN112196933A (en) * | 2019-07-08 | 2021-01-08 | 张金海 | Shock absorption and buffering device |
| CN112196933B (en) * | 2019-07-08 | 2022-03-29 | 上海淳信机电科技股份有限公司 | Shock absorption and buffering device |
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|---|---|
| CN102294945B (en) | 2013-06-12 |
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