CN105114508A - Telescopic piston damping device - Google Patents
Telescopic piston damping device Download PDFInfo
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- CN105114508A CN105114508A CN201510584588.4A CN201510584588A CN105114508A CN 105114508 A CN105114508 A CN 105114508A CN 201510584588 A CN201510584588 A CN 201510584588A CN 105114508 A CN105114508 A CN 105114508A
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- damping device
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Abstract
The invention belongs to the field of car damping devices and particularly discloses a telescopic piston damping device. The telescopic piston damping device comprises a piston cylinder, a telescopic cylinder and a piston located in the piston cylinder. A piston rod is arranged at the bottom of the piston. A supporting rod is arranged on the upper portion of the piston rod. A sliding hole allowing the supporting rod to penetrate through is formed in the portion, above the piston, of the cylinder wall. A steel ball is arranged at the bottom end of the supporting rod. A spherical groove matched with the steel ball is formed in the upper portion of the piston. The piston rod penetrates through the portion, below the piston, of the cylinder wall. The piston rod and the portion, below the piston, of the cylinder wall are sealed through a sealing ring. The lower portion of the piston rod is inserted into the telescopic cylinder. An oil inlet valve and a safety valve are arranged on the side wall of the telescopic cylinder. A one-way valve and a pressure relief valve are arranged on the lower cylinder wall of the piston cylinder.
Description
Technical field
The present invention relates to car damping device field, be specifically related to a kind of telescopic piston damping device.
Background technique
Vehicle is not good in road conditions, usually can cause rocking of vehicle body when taking a sudden turn or bring to a halt.The advantage such as traditional vehicle air suspension damping device has rigidity low (its rigidity be non-linear and adjustable), air suspension is Height Adjustable, quality is light, noise is low, it is applied to (such as senior motor bus, accurate load-carrying vehicle, go-anywhere vehicle etc.) on various vehicle more and more widely.Especially, such as to higher measuring truck, ambulance, the extraordinary military vehicle of shockproof requirement with require that in some special vehicles of Height Adjustable container carrier etc., air suspension damping device almost becomes the unique selection realizing vehicle damping.
Traditional vehicle air suspension damping device mainly using rubber pneumatic bag and membrane type air bag spring as elastic element, utilizes the compressibility of gas not play elastic reaction.But there is following shortcoming in these air suspension damping devices:
First, the bleed pressure provided due to traditional vehicle air suspension damping device limited (general <0.85MPa), and the bearing capacity of air bag spring is limited, along with the increase of vehicle load capacity, the size realizing the air bag spring required for identical damping effect correspondingly also increases thereupon, thus cause the size of whole vehicle air suspension damping device to increase, it is more difficult that this just causes it to be arranged on the minicars such as car, if realize it to install, need to carry out corresponding design comprehensively to vehicle frame, thus make the application area of traditional vehicle air suspension damping device narrower.
Secondly, in traditional vehicle air suspension damping device, air bag spring is made up of rubber material, and in vehicle travel process, the easy corrosion and ageing of rubber material or superpressure are damaged, thus makes vehicle lose shock-absorbing function, increases the danger that vehicle travels.
Moreover; air bag spring can only bear normal load; corresponding guide mechanism usually can be set in the use of vehicle air suspension device to bear axial force, longitudinal force and moment; vehicle balance is regulated and must be processed by the electronic induction balance sysmte of complexity, and this makes traditional vehicle air suspension apparatus structure more complicated and cost is higher.
Finally, air bag spring is due to the restriction of himself material-structure, and the heave amplitude regulation range of air suspension can not be too large, so traditional vehicle air suspension device is very restricted in the lift adjustment design of vehicle.
Now be badly in need of a kind of bearing capacity as can be seen here large, adapt to the damping device that vehicle is wide.
Summary of the invention
The object of the present invention is to provide the telescopic piston damping device that a kind of bearing capacity is large, adaptation vehicle is wide.
For achieving the above object, technological scheme of the present invention is as follows:
The base case that this programme provides is: telescopic piston damping device, comprises piston cylinder, telescopic cylinder and is positioned at the piston of piston cylinder; Described piston base is provided with piston rod, and top is provided with strut, and the casing wall above described piston is provided with the slide opening passed for strut; Described strut bottom is provided with steel ball, and described upper piston area is provided with the ball recess matched with steel ball; Described piston rod is through the casing wall below piston, and the casing wall below piston rod and piston adopts seal ring to seal, and the bottom of piston rod is inserted in telescopic cylinder; The sidewall of described telescopic cylinder is provided with oiling valve and safety valve, and the casing wall of described piston cylinder bottom is provided with one-way valve and Decompression valves.
In the telescopic piston damping device of this programme, telescopic cylinder mainly works the entire length regulating whole telescopic piston damping device on the one hand, plays cushioning effect on the other hand to piston rod.Gas in airtight chamber in piston cylinder below piston plays cushioning effect to piston.Slide opening passes for strut, and when facilitating strut to be subject to non-longitudinal load, strut can offset with the direction of load, and the shearing force suffered by strut is converted to pressure, is conducive to the life-span of prolongation strut simultaneously.Ball recess can facilitate steel ball to do space swing.
Working principle and the advantage of this programme are: concrete when using this telescopic piston damping device, first, according to this damping device use for vehicle, adjust the entire length of this damping device.
When the damping device needing entire length longer, to the oiling valve injection pressure oil in telescopic cylinder, when the pressure oil in telescopic cylinder increases, it is protruding that pressure oil promotes piston rod, piston rod promotes piston and moves to the direction away from telescopic cylinder, and then strut is stretched out from piston cylinder, in this process, the air of one-way valve opens piston cylinder outside is in the airtight chamber that piston in piston cylinder and lower piston cylinder are formed; The final overall length realizing the telescopic piston damping device of elongation.After the telescopic piston damping device of elongation reaches Len req, stop to oiling valve injection pressure oil.This telescopic piston damping device is arranged on automobile frame.When piston rod is by longitudinal loading, strut promotes piston movement, and the air in the airtight chamber below piston carries out damping to piston, in the process that piston moves downward simultaneously, piston rod can extrude the pressure oil in telescopic cylinder, and the pressure oil now in telescopic cylinder carries out damping to piston rod; This damping device carries out damping by air and pressure oil acting in conjunction.When strut is after being subject to longitudinal loading, when skew occurs loading direction, strut along with deflecting, and then avoids strut to bear publishing originally the component (i.e. shearing force) of lotus perpendicular to strut.
When the length of the structural requirement telescopic piston damping device of vehicle frame is shorter, open the Decompression valves on piston cylinder and the safety valve on telescopic cylinder, piston is moved near the direction of telescopic cylinder, and then realizes the overall length shortening whole telescopic piston damping device.
This telescopic piston damping device adopts cylinder body as airtight chamber, and the pressure born than air bag when bearing pressure is larger, and also has pressure oil in telescopic cylinder as auxiliary buffer function, therefore this damping device bearing capacity is larger.Due to the pressure oil mass by regulating in telescopic cylinder, realize the length regulating integral shock-absorbing device, therefore the vehicle that this damping device adapts to is wider.
Preferred version one: based on the preferred version of scheme, be provided with cushion pad in described ball recess.Cushion pad can avoid steel ball and piston rigid contact, is increased the lifting surface area of steel ball by cushion pad.
Preferred version two: based on the preferred version of scheme or preferred version one: be provided with elastomer block in described slide opening.External impurities is avoided to fall in piston cylinder.
Preferred version three: the preferably preferred version of two: the casing wall below described piston is provided with limited post and stage clip; One end of this stage clip is in free state, and the other end is fixed on piston cylinder casing wall, and 4/3 to five/4ths volumes of steel ball are positioned at ball recess; Described elastomer block is rubber stopper.Stage clip plays cushioning effect to piston, and it is spacing that limited post plays the limit to piston, avoids that piston movement is excessive to be damaged by pressure stage clip, causes stage clip to lose efficacy.
Accompanying drawing explanation
Fig. 1 is the structural representation of the present invention's telescopic piston damping device embodiment.
Embodiment
Below by embodiment, the present invention is further detailed explanation:
Reference character in Figure of description comprises: piston cylinder 10, piston 11, piston rod 12, cushion pad 13, limited post 14, stage clip 15, one-way valve 16, Decompression valves 17, airtight chamber 18, strut 20, steel ball 21, telescopic cylinder 30, oiling valve 31, safety valve 32.
Embodiment is substantially as shown in Figure 1: telescopic piston damping device, comprises piston cylinder 10, is positioned at the piston 11 of piston cylinder 10 and telescopic cylinder 30.Piston 11 bottom welding has piston rod 12, and top is provided with strut 20.Casing wall above piston 11 has the slide opening passed for strut 20, the aperture of this slide opening is 2.5 times of strut 20 diameter.Strut 20 bottom is provided with steel ball 21, and piston 11 top is provided with the ball recess matched with steel ball 21; Piston cylinder 10 casing wall that piston rod 12 is transferred through piston 11, and piston rod 12 and piston cylinder 10 casing wall adopt seal ring to seal, the bottom of piston rod 12 is inserted in telescopic cylinder 30; The sidewall of telescopic cylinder 30 is provided with oiling valve 31 and safety valve 32, the casing wall of piston cylinder 10 bottom is provided with one-way valve 16 and Decompression valves 17.
Wherein, be provided with cushion pad 13 in ball recess, this cushion pad 13 adopts silica gel material to be made.Silica gel mature production technology, the anti-pressure ability of silica gel is strong.Be provided with elastomer block in slide opening, this elastomer block is rubber stopper.The mature production technology of rubber stopper, the low and good sealing effect of cost, simultaneously strut 20 is left and right rock or offset time, due to the elasticity of rubber stopper self, less to the resistance of strut 20.Rubber stopper also plays sealing slide opening and avoids external impurities to fall in piston cylinder 10 while not affecting strut 20 motion, and affect the movement effects of piston 11, such as earth, rainwater etc. are called in piston cylinder 10 and piston 11 can be caused to get rusty.
Piston 11 is transferred and just right casing wall is welded 4 uniform limited posts 14 and 4 uniform stage clips 15.One end of this stage clip 15 is in free state, and the other end is fixed on piston cylinder 10 casing wall, and four/three volumes of steel ball 21 is positioned at ball recess.Because 3/4ths of steel ball 21 is positioned at ball recess, then the sphere of activities of strut 20 is relatively limited, therefore strut 20 the sphere of activities when bearing load is smaller, is conducive to damping.
During this telescopic piston damping device of concrete use, first according to this damping device use for vehicle, adjust the entire length of this damping device.
When the damping device needing entire length longer, to the oiling valve 31 injection pressure oil in telescopic cylinder 30, when the pressure oil in telescopic cylinder 30 increases, it is protruding that pressure oil promotes piston rod 12, piston rod 12 promotes piston 11 and moves to the direction away from telescopic cylinder 30, and then strut 20 is stretched out from piston cylinder 10, in this process, one-way valve 16 opens the air of piston cylinder 10 outside in the airtight chamber 18 that piston in piston cylinder 10 11 and lower piston cylinder 10 are formed; The final overall length realizing telescopic piston 11 damping device of elongation.After telescopic piston 11 damping device of elongation reaches Len req, stop to oiling valve 31 injection pressure oil.This telescopic piston 11 damping device is arranged on automobile frame.When piston rod 12 is by longitudinal loading, strut 20 promotes piston 11 and moves, air in airtight chamber 18 below piston 11 carries out damping to piston 11, simultaneously, in the process that piston 11 moves downward, piston rod 12 can extrude the pressure oil in telescopic cylinder 30, and the pressure oil now in telescopic cylinder 30 carries out damping to piston rod 12; This damping device carries out damping by air and pressure oil acting in conjunction.When strut 20 is after being subject to longitudinal loading, when skew occurs loading direction, strut 20 along with deflecting, and then avoids strut 20 to bear publishing originally the component (i.e. shearing force) of lotus perpendicular to strut.
When the length of the structural requirement telescopic piston damping device of vehicle frame is shorter, open the Decompression valves 17 on piston cylinder 10 and the safety valve 32 on telescopic cylinder 30, piston 11 is moved near the direction of telescopic cylinder 30, and then realizes the overall length shortening whole telescopic piston damping device.
This telescopic piston damping device adopts cylinder body as airtight chamber 18, and the pressure born than air bag when bearing pressure is larger, and also has pressure oil in telescopic cylinder 30 as auxiliary buffer function, therefore this damping device bearing capacity is larger.Due to the pressure oil mass by regulating in telescopic cylinder 30, realize the length regulating integral shock-absorbing device, therefore the vehicle that this damping device adapts to is wider.
The term " inefficacy " used in this specification refers to: component lose the function of original design defined.Inefficacy comprises and completely loses original function; Function reduces and has major injury or hidden danger, and continuing use can lose reliability and safety.The inefficacy of mechanical parts mainly comprises: 1. overall fracture, and 2. excessive residual deformation, the 3. surface breakdown of part, 4. destroy the inefficacy that normal operating conditions causes." longitudinal loading " refers to: along the load of strut length direction.
Above-described is only embodiments of the invention, and in scheme, the general knowledge such as known concrete structure and characteristic does not do too much description at this.Should be understood that; for a person skilled in the art, under the prerequisite not departing from structure of the present invention, some distortion and improvement can also be made; these also should be considered as protection scope of the present invention, and these all can not affect effect of the invention process and practical applicability.The protection domain that this application claims should be as the criterion with the content of its claim, and the embodiment in specification etc. record the content that may be used for explaining claim.
Claims (4)
1. telescopic piston damping device, is characterized in that, comprises piston cylinder, telescopic cylinder and is positioned at the piston of piston cylinder; Described piston base is provided with piston rod, and top is provided with strut, and the casing wall above described piston is provided with the slide opening passed for strut; Described strut bottom is provided with steel ball, and described upper piston area is provided with the ball recess matched with steel ball; Described piston rod is through the casing wall below piston, and the casing wall below piston rod and piston adopts seal ring to seal, and the bottom of piston rod is inserted in telescopic cylinder; The sidewall of described telescopic cylinder is provided with oiling valve and safety valve, and the casing wall of described piston cylinder bottom is provided with one-way valve and Decompression valves.
2. telescopic piston damping device according to claim 1, is characterized in that, be provided with cushion pad in described ball recess.
3. telescopic piston damping device according to claim 1 and 2, is characterized in that, be provided with elastomer block in described slide opening.
4. telescopic piston damping device according to claim 3, it is characterized in that, the casing wall below described piston is provided with limited post and stage clip; One end of this stage clip is in free state, and the other end is fixed on piston cylinder casing wall, and 4/3 to five/4ths volumes of steel ball are positioned at ball recess; Described elastomer block is rubber stopper.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510584588.4A CN105114508A (en) | 2015-09-15 | 2015-09-15 | Telescopic piston damping device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510584588.4A CN105114508A (en) | 2015-09-15 | 2015-09-15 | Telescopic piston damping device |
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| Publication Number | Publication Date |
|---|---|
| CN105114508A true CN105114508A (en) | 2015-12-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510584588.4A Pending CN105114508A (en) | 2015-09-15 | 2015-09-15 | Telescopic piston damping device |
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| CN (1) | CN105114508A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107191525A (en) * | 2017-05-08 | 2017-09-22 | 柯利佳 | Active type damper with yielding rubber |
| CN108095910A (en) * | 2017-12-21 | 2018-06-01 | 重庆馨康阁科技有限公司 | Ambulance interior structure |
-
2015
- 2015-09-15 CN CN201510584588.4A patent/CN105114508A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107191525A (en) * | 2017-05-08 | 2017-09-22 | 柯利佳 | Active type damper with yielding rubber |
| CN108095910A (en) * | 2017-12-21 | 2018-06-01 | 重庆馨康阁科技有限公司 | Ambulance interior structure |
| CN108095910B (en) * | 2017-12-21 | 2019-06-28 | 重庆馨康阁科技有限公司 | Ambulance interior structure |
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| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20151202 |
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| WD01 | Invention patent application deemed withdrawn after publication |