CN103016595A - Front suspension oil cylinder for mining vehicle - Google Patents
Front suspension oil cylinder for mining vehicle Download PDFInfo
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- CN103016595A CN103016595A CN2012104988980A CN201210498898A CN103016595A CN 103016595 A CN103016595 A CN 103016595A CN 2012104988980 A CN2012104988980 A CN 2012104988980A CN 201210498898 A CN201210498898 A CN 201210498898A CN 103016595 A CN103016595 A CN 103016595A
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Abstract
The invention discloses a front suspension oil cylinder for a mining vehicle. The front suspension oil cylinder is arranged between an upper vehicle rack and a lower vehicle rack, and comprises a cylinder body, a cylinder bottom fixed at the tail end of the cylinder body, a piston rod matched with the cylinder body inner wall liquid seal in a sliding manner and a piston, wherein a ring sleeve of the piston is fixed at the tail end of the piston rod; the piston rod is provided with an inner chamber of which one end is closed and communicated with a rodless cylinder cavity of the cylinder body; and a non-return valve and a damping hole for communication of the inner chamber and a rod cylinder cavity of the cylinder body are radially formed at the piston rod near to the piston. According to the invention, in the vehicle moving process, the oil cylinder can repeatedly move up and down by the incentive effect of the road surface to adapt to the conditions of the road surface, so as to achieve the functions of vibration damping and support; and by utilizing the non-return valve and the damping hole formed on the piston rod in the moving process, alternate change of damping in size can be realized to achieve the purpose of guaranteeing the motion stability of the vehicle.
Description
Technical field
The present invention relates to technical field of hydraulic oil cylinder, especially a kind of front suspension oil cylinder for industrial car.
Background technique
The industrial car useful load is large, people require more and more higher to its mobility, its average overall travel speed, run smoothness, lateral stability, buffering reliability and riding comfort are the several important indicators to its mobility, all the natural vibration characteristic with vehicle body is relevant for these, and the natural vibration characteristic of vehicle body is decided by its suspension system.Traditional suspension system is mostly by vibration damper and helical spring or leaf spring forms, the rigidity of spring is definite value, in order to guarantee the run smoothness on the different road surfaces, need the rigidity of suspension softer, therefore often the space of suspension is very large, spring-mass is large, can't adapt to the light-weighted development of heavy type chassis, and can not take into account simultaneously travelling comfort and the control stability on chassis; In addition, because the intensity of spring steel is limited, if carrying capacity increases, the volume of leaf spring and length are just inevitable so increases thereupon.
Rubber spring suspension is also very universal on the heavy truck abroad, carries same weight, and the volume of rubber spring is more much smaller than leaf spring.Rubber spring suspension is except having powerful bearing capacity, also have noiseless, non-maintaining advantage, but domestic automobile carrier overload is serious, and heavily the rubber spring on the card is more much lower than abroad working life, so the heavily card overwhelming majority of China still uses Leaf Spring Suspension.
The hydro-pneumatic suspension system of vibration damper and support spring has appearred integrating in the later stage seventies, and technique is widely used at engineering truck.Hydro pneumatic suspension is with the gentle combination of oil, utilizes simultaneously the incompressible realization of fluid to move comparatively accurately and the transmission of power the various powerful controls of property easy to control realization that utilize fluid to flow.Hydro pneumatic suspension can not only have preferably elastic characteristic, the more important thing is that it can realize the good control of motor racing posture easily.Therefore the suspension oil cylinder has determined the main performance of whole suspension system as the most important parts of hydro pneumatic suspension, requires it to have preferably performance at aspects such as non-linear rigidity, nonlinear dampling, vehicle body height free adjustment, unit stored energy ratio are large.
Summary of the invention
The technical problem to be solved in the present invention is: overcome the deficiency in the prior art, provide a kind of for industrial car, have the excellent damping effect, can keep the front suspension oil cylinder of Vehicle Driving Cycle stationarity.
The technical solution adopted for the present invention to solve the technical problems is: a kind of front suspension oil cylinder for industrial car, be installed between the upper and lower vehicle frame of front part of vehicle, the piston rod and the piston that comprise cylinder body, be fixed on the cylinder bottom of cylinder body tail end, be slidingly matched with the inboard wall of cylinder block fluid-tight, piston is divided into cylinder body rod chamber and the rodless cavity of oil cylinder, piston ring set is fixed on the piston rod tail end, described piston rod has and communicates with rodless cavity and the inner chamber of end sealing, and nearly piston place radially is respectively equipped with the damping hole of one-way valve and communication with cavity and rod chamber on the piston rod.
Described cylinder bottom is provided with the tank filler sleeve that communicates with rodless cavity, can refuel, inflate to piston rod cavity by tank filler sleeve.
Described one-way valve comprises steel ball, offers step hole radially on the piston rod, and steel ball is positioned at the macropore in the step hole outside.
For guaranteeing the stationarity of cylinder movement, be provided with guide sleeve between described piston rod and the inboard wall of cylinder block, be provided with guide ring between piston and the inboard wall of cylinder block.
Be positioned at piston rod front end place in the described inner chamber and be provided with sealing block, be provided with back-up ring between sealing block and the interior cavity wall.
The invention has the beneficial effects as follows: the present invention is in the vehicle travel process, incentive action by the road surface, repeatedly move up and down to adapt to the situation on road surface, realized the function of vibration damping and support, be arranged on one-way valve on the piston rod, damping hole is realized the damping size in this process conversion alternately, reached the purpose that guarantees the vehicle movement stationarity.Owing to be filled with oil gas in the piston rod cavity, have nonlinear characteristics, and along with the increase of displacement excitation amplitude, stiffness coefficient increases obviously, this stiffness characteristics has obvious difference with traditional suspension.When the change in displacement of suspension hour, its rigidity value is less, and changes littlely, has had preferably stationarity so that vehicle travels on road surface preferably; When suspension displacement changed greatly, its rigidity also increased sharply, and makes vehicle that preferably impact resistance be arranged when relatively poor road traveling.
Description of drawings
The present invention is further described below in conjunction with drawings and Examples.
Fig. 1 is structural representation of the present invention.
1. cylinder bodies, 2. cylinder bottoms, 3. piston rods, 31. inner chambers, 4. pistons, 5. one-way valves, 51. steel balls, 6. damping holes, 7. tank filler sleeves, 8. guide sleeves, 9. guide rings, 10. sealing blocks, 11. back-up rings, 12. rod chambers, 13. rodless cavities, 14. baffle plates among the figure
Embodiment
The present invention is further illustrated with preferred embodiment by reference to the accompanying drawings now.These accompanying drawings are the schematic representation of simplification, basic structure of the present invention only is described in a schematic way, so it only show the formation relevant with the present invention.
A kind of front suspension oil cylinder for industrial car as shown in Figure 1 is installed between the upper and lower vehicle frame of front part of vehicle.The piston rod 3 and the piston 4 that comprise cylinder body 1, be fixed on the cylinder bottom 2 of cylinder body 1 tail end, be slidingly matched with cylinder body 1 inwall fluid-tight, piston 4 ring sets are fixed on piston rod 3 tail ends, wherein cylinder body 1 endoporus is pre-small post-large shoulder hole, piston rod 3 is slidingly matched with the aperture part fluid-tight of shoulder hole, piston 2 is slidingly matched with the large bore portion fluid-tight of shoulder hole, consist of the rod chamber 12 of oil cylinder between the macropore inwall of piston rod 3, shoulder hole, the piston 4 leading flank threes, consist of the rodless cavity 13 of oil cylinder between the macropore inwall of piston 4 trailing flanks, shoulder hole, the cylinder bottom 2 inner side surface threes.
Described piston rod 3 offers the inner chamber 31 that communicates with rodless cavity 13, and cylinder bottom 2 is provided with the tank filler sleeve 7 that communicates with rodless cavity 13, can refuel, inflate to rodless cavity 13 by this tank filler sleeve 7; Be positioned at piston rod 3 front end places at inner chamber 31, be provided with the sealing block 10 of closed inner chamber 31 1 ends, be provided with the back-up ring 11 that blocks sealing block 10 between sealing block 10 and inner chamber 31 inwalls, and be provided with in addition fixing seal block 10 of baffle plate 14.
Nearly piston 4 places radially are respectively equipped with one-way valve 5 and damping hole 6 on piston rod 3, damping hole 6 communication with cavity 31 and rod chambers 12 wherein, and damping hole 6 quantity can arrange one or more as requested; Described one-way valve 5 is steel ball 51, offers step hole radially on the piston rod 3, and steel ball 51 is positioned at the macropore in the step hole outside.
In order to guarantee the stationarity of cylinder movement, be provided with guide sleeve 8 between described piston rod 3 and cylinder body 1 inwall, guide sleeve 8 is positioned at the step end face place of cylinder body 1 shoulder hole, is provided with guide ring 9 between piston 3 outer circumferential faces and cylinder body 1 inwall.
Operating principle of the present invention is summarized as follows: the inner chamber of piston rod 3 31 is communicated with rodless cavity 13 by several damping holes 6 and one-way valve 5 rod chamber 12 with oil cylinder, after the oil cylinder making is complete, by tank filler sleeve 7 to a certain amount of hydraulic oil of rodless cavity 13 interior addings, hydraulic oil enters in the inner chamber 31 of piston rod 3 simultaneously, behind the oil cylinder board, pour again the inert gas (such as N2) of certain pressure in the rodless cavity 13 by tank filler sleeve 7, that is to say in the oil cylinder it is the mixture that is full of by a certain percentage fluid and inert gas, be subject to uneven road surface when excitation at vehicle, piston 4 and piston rod 3 assemblies will be relative cylinder body 1 reciprocating.1, when the relative cylinder body 1 of piston rod 3 assemblies shrinks, be that the suspension oil cylinder is in compression stroke, then the fluid in the rodless cavity 13 is compressed, gas pressure increases simultaneously, this is equivalent to spring and is compressed, the volume of rod chamber 12 increases simultaneously, pressure drop, at this moment the part fluid in the rodless cavity 13 is under the effect that is compressed gas pressure, enter rod chamber 12 through damping hole 6 and one-way valve 5 from rodless cavity 13, in this course because one-way valve 5 and damping hole 6 simultaneously conductings, the flow through flow velocity of one-way valve 5 and damping hole 6 of fluid is lower, the damping force that produces is smaller, at this moment mainly is compressed by the gas in the rodless cavity 13 and produces the retraction movement that elastic reaction suppresses piston rod 3; 2, stretch out with respect to cylinder body 1 when piston rod 3 assemblies, be that the suspension oil cylinder is in the recovery stroke, then the fluid of rod chamber 12 forces the fluid of rod chamber 12 to flow to rodless cavity 13 by damping hole 6 by compression, and the one-way valve 5 of this moment is in closed condition, therefore produce larger damping force and come rapid attenuation vibration, and rod chamber 12 interior oil pressure risings, the rigidity of restoring stroke is increased, increased damping function, delay resilience, thereby be conducive to improve the stationarity of Vehicle Driving Cycle.Therefore in the stroke of vehicle, because the incentive action on road surface, the suspension oil cylinder can move up and down to adapt to the different situations on road surface repeatedly, realizes the function of vibration damping and support.
At last explanation be that the rigidity of vehicle suspension system is not the linear function of input displacement excitation, but have nonlinear characteristics, and along with the increase of displacement excitation amplitude, stiffness coefficient increases obviously, this stiffness characteristics has obvious difference with traditional suspension.When the change in displacement of suspension hour, its rigidity value is less, and changes littlely, has had preferably stationarity so that vehicle travels on road surface preferably; When suspension displacement changed greatly, its rigidity also increased sharply, and makes vehicle that preferably impact resistance be arranged when relatively poor road traveling.Affect simultaneously comprising of hydro pneumatic suspension oil cylinder characteristic: the parameter of initial inflation pressure, oil cylinder itself (effective area of passage of cylinder block 1 diameter, damping hole 6 and one-way valve 5) and enviromental parameter etc., these all will carry out suitable selection according to actual state, to satisfy usage requirement.
Above-described embodiment only is explanation technical conceive of the present invention and characteristics; its purpose is to allow the personage that is familiar with technique can understand content of the present invention and is implemented; can not limit protection scope of the present invention with this; all equivalences that Spirit Essence is done according to the present invention change or modify, and all should be encompassed in protection scope of the present invention.
Claims (5)
1. industrial car front suspension oil cylinder, be installed on the upper of front part of vehicle, between the lower vehicle frame, comprise cylinder body (1), be fixed on the cylinder bottom (2) of cylinder body (1) tail end, the piston rod (3) and the piston (4) that are slidingly matched with cylinder body (1) inwall fluid-tight, piston (4) is divided into cylinder body (1) rod chamber (12) and the rodless cavity (13) of oil cylinder, it is characterized in that: piston (4) ring set is fixed on piston rod (3) tail end, described piston rod (3) has and communicates with rodless cavity (13) and the inner chamber (31) of end sealing, and the upper nearly piston (4) of piston rod (3) locates radially to be respectively equipped with the damping hole (6) of one-way valve (5) and communication with cavity (31) and rod chamber (12).
2. industrial car according to claim 1 front suspension oil cylinder, it is characterized in that: described cylinder bottom (2) is provided with the tank filler sleeve (7) that communicates with rodless cavity (13).
3. industrial car according to claim 1 front suspension oil cylinder, it is characterized in that: described one-way valve (5) comprises steel ball (51), offer step hole (32) radially on the piston rod (3), steel ball (51) is positioned at the macropore in step hole (32) outside.
4. industrial car according to claim 1 front suspension oil cylinder is characterized in that: be provided with guide sleeve (8) between described piston rod (3) and cylinder body (1) inwall, be provided with guide ring (9) between piston (4) and cylinder body (1) inwall.
5. industrial car according to claim 1 front suspension oil cylinder, it is characterized in that: be positioned at piston rod (3) front end place in the described inner chamber (31) and be provided with sealing block (10), be provided with back-up ring (11) between sealing block (10) and inner chamber (31) inwall.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012104988980A CN103016595A (en) | 2012-11-29 | 2012-11-29 | Front suspension oil cylinder for mining vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012104988980A CN103016595A (en) | 2012-11-29 | 2012-11-29 | Front suspension oil cylinder for mining vehicle |
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| Publication Number | Publication Date |
|---|---|
| CN103016595A true CN103016595A (en) | 2013-04-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012104988980A Pending CN103016595A (en) | 2012-11-29 | 2012-11-29 | Front suspension oil cylinder for mining vehicle |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105889392A (en) * | 2016-05-23 | 2016-08-24 | 广西柳工机械股份有限公司 | Suspension cylinder of mining dump truck |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20010032462A1 (en) * | 2000-04-20 | 2001-10-25 | Mannesmann Sachs Ag | Suspension system for motor vehicles |
| CN201198853Y (en) * | 2008-05-15 | 2009-02-25 | 内蒙古北方重型汽车股份有限公司 | Buffering device of automobile hanging cylinder |
| CN101639106A (en) * | 2009-08-25 | 2010-02-03 | 深圳市中车业成实业有限公司 | Piston-type hydro-pneumatic buffer |
| CN201475229U (en) * | 2009-07-20 | 2010-05-19 | 乐清市乐泰重型机械配件有限公司 | Mine vehicle oil-gas front suspension cylinder assembly |
| CN203035836U (en) * | 2012-11-29 | 2013-07-03 | 江苏恒立高压油缸股份有限公司 | Front suspension oil cylinder used for industrial vehicle |
-
2012
- 2012-11-29 CN CN2012104988980A patent/CN103016595A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20010032462A1 (en) * | 2000-04-20 | 2001-10-25 | Mannesmann Sachs Ag | Suspension system for motor vehicles |
| CN201198853Y (en) * | 2008-05-15 | 2009-02-25 | 内蒙古北方重型汽车股份有限公司 | Buffering device of automobile hanging cylinder |
| CN201475229U (en) * | 2009-07-20 | 2010-05-19 | 乐清市乐泰重型机械配件有限公司 | Mine vehicle oil-gas front suspension cylinder assembly |
| CN101639106A (en) * | 2009-08-25 | 2010-02-03 | 深圳市中车业成实业有限公司 | Piston-type hydro-pneumatic buffer |
| CN203035836U (en) * | 2012-11-29 | 2013-07-03 | 江苏恒立高压油缸股份有限公司 | Front suspension oil cylinder used for industrial vehicle |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105889392A (en) * | 2016-05-23 | 2016-08-24 | 广西柳工机械股份有限公司 | Suspension cylinder of mining dump truck |
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Application publication date: 20130403 |