CN102817879B - Hydro-pneumatic spring cylinder and engineering vehicle - Google Patents
Hydro-pneumatic spring cylinder and engineering vehicle Download PDFInfo
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- CN102817879B CN102817879B CN201210313177.8A CN201210313177A CN102817879B CN 102817879 B CN102817879 B CN 102817879B CN 201210313177 A CN201210313177 A CN 201210313177A CN 102817879 B CN102817879 B CN 102817879B
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Abstract
The invention provides a kind of hydro-pneumatic spring cylinder, comprise outer cylinder, middle cylinder barrel, inner cylinder tube, piston and piston rod, one end of piston rod is installed with piston, and the other end is fixedly connected with one end of outer cylinder, piston is positioned at inner cylinder tube, and inner cylinder tube can move along the axis of piston rod; Middle cylinder barrel is enclosed within the outer and one end of inner cylinder tube of inner cylinder tube and middle cylinder barrel and is connected by joint shaft bearing or double thrust-bearing or ball pivot; Middle cylinder barrel inserts in outer cylinder and also along the axis rectilinear movement of outer cylinder and can rotate.Present invention also offers a kind of engineering vehicle comprising this hydro-pneumatic spring cylinder.By the present invention, hydro-pneumatic spring cylinder can bear radial load, and by each to dynamic changes process on vehicle frame, does not affect performance and the life-span of spring cylinder; And the radial load be subject to does not produce excessive steering drag, sealability and working life are guaranteed; In addition, also have good fluid circulation area and intensity, hydraulic pipe line does not affect suspension performance and steering characteristic.
Description
Technical field
The present invention relates to engineering machinery field, in particular to a kind of hydro-pneumatic spring cylinder and the engineering vehicle including this hydro-pneumatic spring cylinder.
Background technique
The structure of the hydro-pneumatic spring cylinder used in hydro-pneumatic suspension system is mostly suitable with the structure of telescopic shock absorber, only can bear the load along spring cylinder axial direction, play buffering and cushioning effect; Can not radial load be born, therefore this spring cylinder must configure in use some guiding and force-transmitting device bear and overcome every load.
Patent US5031732 discloses a kind of automobile absorber, comprises guide cylinder, supporting component, guide ring, piston, piston rod and hydraulic pipe line and accumulator, and the technical problem that this structural type exists is:
1) in, cylinder and inner core are rigidly connected, when supporting component is subject to radial load due to the resiliently deformable of support ring, supporting component will produce rigid displacement, thus cause piston assembly and inner core disalignment, move at axis and increase resistance in the process that rotates in a circumferential direction, and be unfavorable for the sealing of piston, reduce the life-span;
2) structure of this multi-cylinder cartridge type, has very high requirement to the coaxality between each cylinder barrel, thus requires very high to manufacture and assembly precision, improves manufacturing cost.
Patent US5031732 discloses a kind of automobile absorber, comprises guide cylinder, supporting component, guide ring, piston, piston rod and hydraulic pipe line and accumulator, and the technical problem that this structural type exists is:
1) oil cylinder is driven to rotate by the steering gear when turning to, adopt spline joint with transmitting torque between oil cylinder and guide cylinder, thus drive wheel steering, because bob wanted by wheel, therefore the connection spline length between oil cylinder and guide cylinder need be greater than the stroke of oil cylinder, and manufacture requirements is very high;
2) from the structure of oil cylinder, the normal load that oil cylinder is subject to is born by the rolling bearing between oil cylinder and urceolus;
3) rodless cavity oil circuit is drawn bottom supporting leg by piston rod, stringing difficulty, and length of pipe can change along with the stroke of oil cylinder;
4) be rigidly connected between piston rod and guide cylinder, when guide cylinder is subject to radial load, easily by radial load transfer on piston rod.
Patent US6227338B1 discloses a kind of vibration damper supporting leg of top tape the steering gear, comprises urceolus, guide cylinder, oil cylinder, piston, piston rod and the steering gear, and the technical problem that this structure exists is:
1) this structure comprises two oil circuits, and structure is very complicated, reach purpose of design, and the required precision of each component is very high, manufactures difficulty;
2) oil circuit of total and Sealing a lot, there is the risk of very large leakage of oil.
Therefore, it is simple, reliable that those skilled in the art need a kind of structure badly, and be convenient to the hydro-pneumatic spring cylinder manufactured, this hydro-pneumatic spring cylinder can bear radial load, and is well delivered to each on vehicle frame to load, does not affect performance and the life-span of spring cylinder; Turning function can be realized, and the radial load be subject to does not produce excessive steering drag; Hydraulically powered mode can be adapted to, ensure that oil hydraulic motor oil feed line does not affect bump travel and the steering angle of spring cylinder.
Summary of the invention
In order to solve the problems of the technologies described above, one object of the present invention is, a kind of hydro-pneumatic spring cylinder is provided, inner cylinder tube and middle cylinder barrel are connected by joint shaft bearing or double thrust-bearing or ball pivot, radial load can be born, and well can be delivered to each on vehicle frame to load, do not affect performance and the life-span of spring cylinder; Turning function can also be realized, and the radial load be subject to does not produce excessive steering drag; This hydro-pneumatic spring cylinder also comprises swivel coupling, and swivel coupling adopts the design of multichannel oil circuit, the circulation area of fluid and the intensity of narrow and small annular revolution core body can either be ensured, hydraulically powered mode can be adapted to again, ensure that oil hydraulic motor oil feed line does not affect bump travel and the steering angle of spring cylinder.
In view of this, the invention provides a kind of hydro-pneumatic spring cylinder, comprise outer cylinder, middle cylinder barrel, inner cylinder tube, piston and piston rod, one end of described piston rod is installed with described piston, the other end is fixedly connected with one end of described outer cylinder, described piston is installed in described inner cylinder tube, and described inner cylinder tube can move linearly along the axial direction of described piston rod; Described middle cylinder barrel is enclosed within outside described inner cylinder tube, and one end of described inner cylinder tube and described middle cylinder barrel are by joint shaft bearing or by double thrust-bearing or be connected by ball pivot; One end of described middle cylinder barrel is inserted in described outer cylinder, and described middle cylinder barrel not only along the axial direction rectilinear movement of described outer cylinder but also can rotate around the axis of described outer cylinder.
Hydro-pneumatic spring cylinder adopts the Combination Design of multi-cylinder cylinder, hydro-pneumatic spring cylinder itself is born each to load, but does not affect sealability and piston working life of hydro-pneumatic spring cylinder itself, the inner core of hydro-pneumatic spring is connected with adopting joint shaft bearing or double thrust-bearing or ball pivot between middle cylinder, belong to and flexibly connect, can be good at making up malalignment between each component of causing due to foozle to the impact of spring cylinder performance, reduce the requirement to accuracy of manufacturing, this joint shaft bearing or double thrust-bearing or ball pivot can also decompose radial load and the displacement of spring cylinder preferably simultaneously, inner core is made not bear radial load thus the rigidity of guarantee spring cylinder self and damping characteristic, excessive steering drag can not be produced when spring cylinder is subject to radial load and affect the turning function of car load, in addition, ball pivot and double thrust-bearing also can make not relatively rotate between inner core and piston in steering procedure, do not produce steering drag, reduce the moment in rotation process, further increase the working life of hydro-pneumatic spring cylinder.
In this technological scheme, preferably, revolution core body is fixedly connected with at the other end of described middle cylinder barrel, the outer circumferential face of described revolution core body is rotatably mounted with swivel coupling, be fixedly installed adpting flange in the bottom of described revolution core body, being provided with in described revolution core body, swivel coupling and adpting flange can the oil duct of on-off mutually.
Loop is formed by swivel coupling, hydraulic pipe line is made not affect suspension performance and the steering characteristic of driving system, in the design of swivel coupling, adopt the design of multichannel oil circuit simultaneously, both ensure that the circulation area of fluid, in turn ensure that the intensity of narrow and small annular revolution core body, can be connected with Wheel support by adpting flange, realize turning function.
Preferably, described revolution core body has the first circular groove and the second circular groove, described swivel coupling is provided with the first hydraulic fluid port and the second hydraulic fluid port, the first oil duct and the second oil duct is had at described revolution core body and described adpting flange inside, described first hydraulic fluid port is communicated with described first oil duct by described first circular groove, described second hydraulic fluid port is communicated with described second oil duct by described second circular groove, between described revolution core body and described swivel coupling, be also provided with the first Sealing.
Oil-feed oil circuit and the oil return circuit of high pressure oil hydraulic circuit is formed after being communicated with, the oil-feed port of oil hydraulic motor and oil drain out are communicated with swivel coupling hydraulic fluid port and form loop, oil hydraulic motor is communicated with hydro-pneumatic spring cylinder oil circuit, the high pressure liquid force feed of needs is flowed to oil hydraulic motor, ensure that hydraulic pipe line does not affect suspension performance and the steering characteristic of driving system, design many oil circuits simultaneously, the intensity of the circulation area that fluid is large and narrow and small annular revolution core body can either be ensured, hydraulically powered mode can be adapted to again and ensure that oil hydraulic motor oil feed line does not affect bump travel and the steering angle of spring, first Sealing is set between revolution core body and swivel coupling, prevents from revealing in high pressure liquid force feed transmitting procedure, reduce the pressure of transmitting procedure mesohigh hydraulic oil, cause hydraulic oil can not smooth delivery of power to oil hydraulic motor, affect the working life of parts.By Sealing, hydraulic oil is sealed, save the energy, cut the waste.
In above-mentioned arbitrary technological scheme, preferably, the outer wall of described outer cylinder is fixedly installed the mounting flange for being fixedly connected with.
Hydro-pneumatic spring cylinder can be directly fixedly connected with vehicle frame by flange plate, and ensure that the load of all directions can be passed to vehicle frame well, structure is more reliable.
In technique scheme, preferably, the internal face of the other end of described inner cylinder tube is installed with guide sleeve, the internal face of described guide sleeve matches with the outer wall of described piston rod, and is provided with the first guide support ring and the second Sealing between the internal face of described guide sleeve and the outer wall of described piston rod.
The stroke of guide sleeve to inner cylinder tube leads, and determines the movement locus of inner cylinder tube, ensures that inner cylinder tube moves in the axial direction, Sealing seals hydraulic oil in rod chamber, prevent hydraulic oil from revealing, guided bearing ring is slidably connected with piston rod, carries out supporting and leading.
In technique scheme, preferably, the outer wall of described guide sleeve is fixedly connected with by the internal face of screw thread with the described the other end of described inner cylinder tube, and between described guide sleeve and described inner cylinder tube, be provided with the 3rd Sealing.
Guide sleeve is connected with inner cylinder tube by screw thread, is fixed guide sleeve, can lead, and fit seal is to the sealing of rod chamber, prevents hydraulic oil from revealing.
In technique scheme, preferably, described piston is fixed on one end of described piston rod by screw thread and Cock screw, and between described piston and described piston rod, be provided with the 4th Sealing, the outer wall of described piston coordinates with the internal face of described inner cylinder tube, the outer wall of described piston is provided with the second guide support ring and the 5th Sealing, the then internal face of described inner cylinder tube, rodless cavity is formed between one end face of interior edge face and described piston, the other end of described piston, the internal face of described inner cylinder tube, rod chamber is formed between the interior edge face of described guide sleeve and the outer wall of described piston rod.
Piston and piston rod are threaded connection, and ensure that piston and piston rod are coaxial after installing, after installing, hydro-pneumatic spring cylinder normally uses; Sealing is set, prevents the hydraulic oil in rodless cavity and rod chamber from mutually circulating on the one hand, prevent the loss of pressure in hyperbaric chamber on the other hand, cause piston stroke unstable; Guide sleeve is set, ensures that the relative rectilinear of inner cylinder tube and piston moves.
In technique scheme, preferably, the other end of described piston rod is fixedly connected with by bar head one end with described outer cylinder, the 3rd oil duct and the 4th oil duct is provided with in described piston rod and described bar head, described 3rd oil duct is communicated with described rodless cavity, and described 4th oil duct is communicated with described rod chamber.
Arrange oil duct, ensure that in rod chamber and rodless cavity, hydraulic oil circulates with extraneous, intraluminal fluid force feed and the external world can compensate.
In technique scheme, preferably, the outer wall of described middle cylinder barrel and the internal face of described outer cylinder coordinate, and on the internal face of described outer cylinder, be provided with dust ring, seal ring and the 3rd guide support ring.
Dust ring and seal ring are set, prevent external substance from entering and inner wall of cylinder is scratched, affect cylinder barrel and normally advance reduction simultaneously cylinder barrel working life; Guided bearing ring is set, is substituted by guide support loop contacts between cylinder barrel and directly contact, improve the life-span of cylinder barrel, determine cylinder barrel shift motion simultaneously, ensure that cylinder barrel moves back and forth in predefined trajectory.
Present invention also offers a kind of engineering vehicle, comprise the hydro-pneumatic spring cylinder according to any one of technique scheme.Obviously, there are whole beneficial effects of above-mentioned hydro-pneumatic spring cylinder.
In sum, hydro-pneumatic spring cylinder provided by the invention, can bear radial load, and is well delivered to each on vehicle frame to load, does not affect performance and the life-span of spring; Turning function can be realized, and the radial load be subject to does not produce excessive steering drag; Simultaneously, swivel coupling adopts the design of multichannel oil circuit, the circulation area of fluid and the intensity of narrow and small annular revolution core body can either be ensured, hydraulically powered mode can be adapted to again, ensure that oil hydraulic motor oil feed line does not affect bump travel and the steering angle of spring.
Accompanying drawing explanation
Fig. 1 is the structure cross-sectional schematic of hydro-pneumatic spring cylinder according to an embodiment of the invention;
Fig. 2 is the revolution core body of Fig. 1 embodiment and the cross-sectional schematic of middle cylinder barrel linkage structure;
Fig. 3 is the cross-sectional schematic of the joint shaft bearing linkage structure of Fig. 1 embodiment;
Fig. 4 is the partial schematic sectional view of Fig. 3 embodiment;
Fig. 5 is the cross-sectional schematic of the double thrust bearing of Fig. 1 embodiment;
Fig. 6 is the cross-sectional schematic of Fig. 1 embodiment spherical hinge structure;
Fig. 7 is the cross-sectional schematic of interior oil cylinder component in Fig. 1 embodiment;
Fig. 8 is the cross-sectional schematic of Fig. 1 embodiment China and foreign countries cylinder assembly;
Fig. 9 is the cross-sectional schematic of cylinder assembly in Fig. 1 embodiment.
Wherein, the corresponding relation in Fig. 1 to Fig. 9 between reference character and component names is:
In 1 outer cylinder 11 mounting flange 12 dust ring 13 seal ring 14 the 3rd guided bearing ring 2, cylinder barrel 21 turns round the double thrust-bearing of core body 211 adpting flange 212 first circular groove 213 second circular groove 214 first oil duct 215 second oil duct 216 first Sealing 22 swivel coupling 211 adpting flange 221 first hydraulic fluid port 222 second hydraulic fluid port 3 inner cylinder tube 31 piston 311 Cock screw 312 the 4th Sealing 313 second guide support ring 314 the 5th Sealing 32 piston rod 321 bar head 322 the 3rd oil duct 323 the 4th oil duct 33 guide sleeve 331 first guide support ring 332 second Sealing 333 the 3rd Sealing 34 rodless cavity 35 rod chamber 4 ball pivot 5 joint shaft bearing 6
Embodiment
In order to more clearly understand above-mentioned purpose of the present invention, feature and advantage, below in conjunction with the drawings and specific embodiments, the present invention is further described in detail.
Set forth a lot of detail in the following description so that fully understand the present invention; but; the present invention can also adopt other to be different from other modes described here and implement, and therefore, protection scope of the present invention is not by the restriction of following public specific embodiment.
Below in conjunction with drawings and Examples, the present invention will be further described.It should be noted that, when not conflicting, the feature in the embodiment of the application and embodiment can combine mutually.
As shown in Figures 1 to 4: the hydro-pneumatic spring cylinder that the present embodiment provides, comprise outer cylinder 1, middle cylinder barrel 2, inner cylinder tube 3, piston 31 and piston rod 32, one end of described piston rod 32 is installed with described piston 31, the other end is fixedly connected with one end of described outer cylinder 1, described piston 31 is installed in inner cylinder tube 3, and inner cylinder tube 3 can move linearly along the axial direction of piston rod 32; Middle cylinder barrel 2 is enclosed within outside inner cylinder tube 3, and one end of inner cylinder tube 3 is connected by joint shaft bearing 5 with middle cylinder barrel 2; One end of middle cylinder barrel 2 is inserted in outer cylinder 1, middle cylinder barrel 2 can not only along outer cylinder 1 axial direction rectilinear movement but also can rotate around the axis of described outer cylinder 1.
In this embodiment, the inner core of hydro-pneumatic spring adopts joint shaft bearing to be connected with between middle cylinder, belong to and flexibly connect, can be good at making up malalignment between each component of causing due to foozle to the impact of spring cylinder performance, reduce the requirement to accuracy of manufacturing, this joint shaft bearing can also decompose radial load and the displacement of spring cylinder preferably simultaneously, make inner core not bear radial load thus ensure the rigidity of spring cylinder self and damping characteristic, excessive steering drag can not be produced when spring cylinder is subject to radial load and affect the turning function of car load.
Preferably, as shown in Fig. 1 to Fig. 6, Fig. 9, revolution core body 21 is fixedly connected with at the other end of middle cylinder barrel 2, the outer circumferential face of revolution core body 21 is rotatably mounted with swivel coupling 22, be fixedly installed the adpting flange 211 that can be fixedly connected with Wheel support in the bottom of revolution core body 21, being provided with in described revolution core body 21, swivel coupling 22 and adpting flange 211 can the oil duct of on-off mutually.
Hydro-pneumatic spring cylinder adopts the Combination Design of multi-cylinder cylinder, hydro-pneumatic spring cylinder itself is born each to load, but does not affect sealability and piston working life of hydro-pneumatic spring cylinder itself; Form loop by swivel coupling, the high pressure liquid force feed that oil hydraulic motor needs is flowed to motor, makes hydraulic pipe line not affect suspension performance and the steering characteristic of driving system.In the design of swivel coupling, adopt the design of multichannel oil circuit simultaneously, both ensure that the circulation area of fluid, in turn ensure that the intensity of narrow and small annular revolution core body.Adpting flange is connected with Wheel support, realizes turning function.
Preferably, as shown in Figures 1 to 6, revolution core body 21 has the first circular groove 212 and the second circular groove 213, swivel coupling 22 is provided with the first hydraulic fluid port 221 and the second hydraulic fluid port 222, the first oil duct 214 and the second oil duct 215 is had at revolution core body 21 and adpting flange 211 inside, first hydraulic fluid port 221 is communicated with the first oil duct 214 by the first circular groove 212, second hydraulic fluid port 222 is communicated with the second oil duct 215 by the second circular groove 213, between revolution core body 21 and swivel coupling 22, be also provided with the first Sealing 216.。
Oil-feed oil circuit and the oil return circuit of high pressure oil hydraulic circuit is formed after being communicated with, the oil-feed port of oil hydraulic motor and oil drain out are communicated with swivel coupling hydraulic fluid port and form loop, oil hydraulic motor is communicated with hydro-pneumatic spring cylinder oil circuit, the high pressure liquid force feed of needs is flowed to oil hydraulic motor, ensure that hydraulic pipe line does not affect suspension performance and the steering characteristic of driving system, design many oil circuits simultaneously, the intensity of the circulation area that fluid is large and narrow and small annular revolution core body can either be ensured, hydraulically powered mode can be adapted to again and ensure that oil hydraulic motor oil feed line does not affect bump travel and the steering angle of spring, first Sealing is set between revolution core body and swivel coupling, prevents to outward leakage in high pressure liquid force feed transmitting procedure, reduce the pressure of transmitting procedure mesohigh hydraulic oil, cause hydraulic oil can not smooth delivery of power to oil hydraulic motor, affect the working life of parts.Sealed hydraulic oil by Sealing, save the energy, cut the waste, in the present embodiment, as shown in Fig. 2,3,5, the first Sealing 216 is three, plays the effect of fully sealing.
In above-described embodiment, one end of interior thick stick cylinder 3 is connected by joint shaft bearing 5 with middle cylinder barrel 2, and to realize both flexibly connecting, but as an alternative, as shown in Figure 5, one end of inner cylinder tube 3 is connected by double thrust-bearing 6 with middle cylinder barrel 2; Or as shown in Figure 6, both are connected by ball pivot 4.
For realizing flexibly connecting between the inner core of hydro-pneumatic spring and middle cylinder, double thrust-bearing or ball pivot is adopted to connect, also can be good at making up malalignment between each component of causing due to foozle to the impact of spring performance, reduce spring structure to the requirement of accuracy of manufacturing, spring cylinder diameter can also be decomposed preferably to the load in direction and displacement simultaneously, make inner core not bear radial load thus ensure rigidity and the damping characteristic of spring cylinder self; In addition, ball pivot and double thrust-bearing can make not relatively rotate between inner core and piston in steering procedure, therefore do not produce steering drag, reduce the moment in rotation process, further increase the working life of hydro-pneumatic spring cylinder.
In technique scheme, preferably, as shown in Fig. 1 to Fig. 3, Fig. 5,6,8, the outer wall of outer cylinder 1 is fixedly installed mounting flange 11, mounting flange 11 can be fixedly connected with vehicle body.
Hydro-pneumatic spring cylinder is directly connected with vehicle frame by flange plate, ensures that the load of all directions can be passed to vehicle frame well, more reliably.
Preferably, as shown in Figure 1 and Figure 7, the internal face of the other end of inner cylinder tube 3 is installed with guide sleeve 33, the internal face of guide sleeve 33 matches with the outer wall of piston rod 32, and between the internal face of guide sleeve 33 and the outer wall of piston rod 32, be provided with the first guide support ring 331 and the second Sealing 332.
The stroke of guide sleeve to inner cylinder tube leads, and determines the movement locus of inner cylinder tube, ensures that inner cylinder tube moves in the axial direction, Sealing seals hydraulic oil in rod chamber, prevent hydraulic oil from revealing, guided bearing ring is slidably connected with piston rod, carries out supporting and leading.
On the one hand, the outer wall of guide sleeve 33 is fixedly connected with by the internal face of screw thread with the described the other end of inner cylinder tube 3, and between guide sleeve 33 and inner cylinder tube 3, be provided with the 3rd Sealing 333.
Guide sleeve is connected with inner cylinder tube by screw thread, is fixed guide sleeve, can lead, and fit seal, to the sealing of rod chamber, prevents hydraulic oil from revealing.
On the other hand, piston 31 is fixed on one end of piston rod 32 by screw thread and Cock screw 311, and between piston 31 and piston rod 32, be provided with the 4th Sealing 312, the outer wall of described piston 31 coordinates with the internal face of described inner cylinder tube 3, the outer wall of described piston 31 is provided with the second guide support ring 313 and the 5th Sealing 314, the then internal face of inner cylinder tube 3, rodless cavity 34 is formed between one end face of interior edge face and piston 31, the other end of piston 31, the internal face of inner cylinder tube 3, rod chamber 35 is formed between the interior edge face of guide sleeve 33 and the outer wall of piston rod 32.
Piston and piston rod are threaded connection, and ensure that piston and piston rod are coaxial after installing, after installing, hydro-pneumatic spring cylinder normally uses.Sealing is set, prevents the hydraulic oil in rodless cavity and rod chamber from mutually circulating on the one hand, prevent the loss of pressure in hyperbaric chamber on the other hand, cause piston stroke unstable; Guide sleeve is set, ensures that the relative rectilinear of inner cylinder tube and piston moves.
Further, preferably, as shown in Figure 1 and Figure 7, the other end of described piston rod 32 is fixedly connected with by bar head 321 one end with described outer cylinder 1, the 3rd oil duct 322 and the 4th oil duct 323 is provided with in piston rod 32 and bar head 321,3rd oil duct 322 is communicated with rodless cavity 34, and the 4th oil duct 323 is communicated with rod chamber 35.
Arrange oil duct, ensure that in rod chamber and rodless cavity, hydraulic oil circulates with extraneous, intraluminal fluid force feed and the external world can compensate.
The quantity of described " circular groove ", " hydraulic fluid port ", " oil duct " should set as required, and the quantity of this embodiment setting is only a kind of specific implementation form, is not the restriction to the application.
Preferably, as shown in Figure 1, the outer wall of middle cylinder barrel 2 and the internal face of outer cylinder 1 coordinate, and on the internal face of described outer cylinder 1, be provided with dust ring 12, seal ring 13 and the 3rd guide support ring 14.
Dust ring and seal ring are set, prevent external substance from entering and inner wall of cylinder is scratched, affect cylinder barrel and normally advance reduction simultaneously cylinder barrel working life; Guided bearing ring is set, is substituted by guide support loop contacts between cylinder barrel and directly contact, improve the life-span of cylinder barrel, determine cylinder barrel shift motion simultaneously, ensure that cylinder barrel moves back and forth in predefined trajectory.
It will be understood by those of skill in the art that usage quantity and the position of guided bearing ring, Sealing, dust-proof cushion described in above-described embodiment should set as required, quantity and the position of this embodiment setting are only a kind of specific implementation form.
Equally, the quantity of " guide sleeve ", " support ring " in above-described embodiment, " sealing gasket " " dust-proof cushion " etc. can change as the case may be, and the quantity such as " circular groove ", " hydraulic fluid port ", " oil duct " also can set as the case may be.For the ordinary skill in the art, above-mentioned term concrete meaning in the present invention can be understood according to concrete structure.
Present invention also offers a kind of vehicle, comprise the hydro-pneumatic spring cylinder described in above-mentioned any embodiment.There are whole beneficial effects of hydro-pneumatic spring cylinder described in above-described embodiment.
In sum, hydro-pneumatic spring cylinder provided by the invention, can bear radial load, and is well delivered to each on vehicle frame to load, does not affect performance and the life-span of spring; Turning function can be realized, and the radial load be subject to does not produce excessive steering drag; Simultaneously, swivel coupling adopts the design of multichannel oil circuit, the circulation area of fluid and the intensity of narrow and small annular revolution core body can either be ensured, hydraulically powered mode can be adapted to again, ensure that oil hydraulic motor oil feed line does not affect bump travel and the steering angle of spring.
In the present invention, term " first ", " second ", " the 3rd " object only for describing, and instruction or hint relative importance can not be interpreted as; Unless otherwise clearly defined and limited, term " is connected ", " connection ", the term such as " fixing " all should be interpreted broadly, and such as, can be fixedly connected with, also can be removably connect, or connect integratedly; Can be directly be connected, also indirectly can be connected by intermediary.For the ordinary skill in the art, above-mentioned term concrete meaning in the present invention can be understood as the case may be.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. a hydro-pneumatic spring cylinder, comprise outer cylinder (1), middle cylinder barrel (2), inner cylinder tube (3), piston (31) and piston rod (32), it is characterized in that, one end of described piston rod (32) is installed with described piston (31), the other end is fixedly connected with the one end of described outer cylinder (1), described piston (31) is installed in described inner cylinder tube (3), and described inner cylinder tube (3) can move linearly along the axial direction of described piston rod (32); Described middle cylinder barrel (2) is enclosed within described inner cylinder tube (3) outward, and one end of described inner cylinder tube (3) is connected by joint shaft bearing (5) or by double thrust-bearing (6) or by ball pivot (4) with described middle cylinder barrel (2); One end of described middle cylinder barrel (2) is inserted in described outer cylinder (1), and described middle cylinder barrel (2) not only along the axial direction rectilinear movement of described outer cylinder (1) but also can be rotated around the axis of described outer cylinder (1).
2. hydro-pneumatic spring cylinder according to claim 1, it is characterized in that, revolution core body (21) is fixedly connected with at the other end of described middle cylinder barrel (2), the outer circumferential face of described revolution core body (21) is rotatably mounted with swivel coupling (22), be fixedly installed adpting flange (211) in the bottom of described revolution core body (21), being provided with in described revolution core body (21), swivel coupling (22) and adpting flange (211) can the oil duct of on-off mutually.
3. hydro-pneumatic spring cylinder according to claim 2, it is characterized in that, described revolution core body (21) has the first circular groove (212) and the second circular groove (213), described swivel coupling (22) is provided with the first hydraulic fluid port (221) and the second hydraulic fluid port (222), the first oil duct (214) and the second oil duct (215) is had described revolution core body (21) and described adpting flange (211) inside, described first hydraulic fluid port (221) is communicated with described first oil duct (214) by described first circular groove (212), described second hydraulic fluid port (222) is communicated with described second oil duct (215) by described second circular groove (213), the first Sealing (216) is also provided with between described revolution core body (21) and described swivel coupling (22).
4. hydro-pneumatic spring cylinder according to any one of claim 1 to 3, is characterized in that, the outer wall of described outer cylinder (1) is fixedly installed the mounting flange (11) for being fixedly connected with.
5. hydro-pneumatic spring cylinder according to claim 4, it is characterized in that, the internal face of the other end of described inner cylinder tube (3) is installed with guide sleeve (33), the internal face of described guide sleeve (33) matches with the outer wall of described piston rod (32), and is provided with the first guide support ring (331) and the second Sealing (332) between the internal face of described guide sleeve (33) and the outer wall of described piston rod (32).
6. hydro-pneumatic spring cylinder according to claim 5, it is characterized in that, the outer wall of described guide sleeve (33) is fixedly connected with by the internal face of screw thread with the described the other end of described inner cylinder tube (3), and between described guide sleeve (33) and described inner cylinder tube (3), be provided with the 3rd Sealing (333).
7. hydro-pneumatic spring cylinder according to claim 5, it is characterized in that, described piston (31) is fixed on one end of described piston rod (32) by screw thread and Cock screw (311), and between described piston (31) and described piston rod (32), be provided with the 4th Sealing (312), the outer wall of described piston (31) coordinates with the internal face of described inner cylinder tube (3), the outer wall of described piston (31) has the second guide support ring (313) and the 5th Sealing (314), the then internal face of described inner cylinder tube (3), rodless cavity (34) is formed between one end face of interior edge face and described piston (31), the other end of described piston (31), the internal face of described inner cylinder tube (3), rod chamber (35) is formed between the interior edge face of described guide sleeve (33) and the outer wall of described piston rod (32).
8. hydro-pneumatic spring cylinder according to claim 7, it is characterized in that, the other end of described piston rod (32) is fixedly connected with by bar head (321) one end with described outer cylinder (1), the 3rd oil duct (322) and the 4th oil duct (323) is provided with in described piston rod (32) and described bar head (321), described 3rd oil duct (322) is communicated with described rodless cavity (34), and described 4th oil duct (323) is communicated with described rod chamber (35).
9. hydro-pneumatic spring cylinder according to claim 4, it is characterized in that, described middle cylinder barrel (2) and described outer cylinder (1) coordinate, and on the internal face of described outer cylinder (1), be provided with dust ring (12), seal ring (13) and the 3rd guide support ring (14).
10. an engineering vehicle, is characterized in that, comprises hydro-pneumatic spring cylinder as claimed in any one of claims 1-9 wherein.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210313177.8A CN102817879B (en) | 2012-08-29 | 2012-08-29 | Hydro-pneumatic spring cylinder and engineering vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210313177.8A CN102817879B (en) | 2012-08-29 | 2012-08-29 | Hydro-pneumatic spring cylinder and engineering vehicle |
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| Publication Number | Publication Date |
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| CN102817879A CN102817879A (en) | 2012-12-12 |
| CN102817879B true CN102817879B (en) | 2015-09-30 |
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| CN201210313177.8A Active CN102817879B (en) | 2012-08-29 | 2012-08-29 | Hydro-pneumatic spring cylinder and engineering vehicle |
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| CN105257627B (en) * | 2015-11-25 | 2018-10-12 | 湖南特力液压有限公司 | Hydraulic cylinder and engineering machinery |
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| US6227338B1 (en) * | 1998-03-27 | 2001-05-08 | Grove U.S. L.L.C. | Shock absorbing leg with top steering attachment |
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| CN102817879A (en) | 2012-12-12 |
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