CN114228426A - Rear oil gas suspension assembly and vehicle - Google Patents
Rear oil gas suspension assembly and vehicle Download PDFInfo
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- CN114228426A CN114228426A CN202111639226.2A CN202111639226A CN114228426A CN 114228426 A CN114228426 A CN 114228426A CN 202111639226 A CN202111639226 A CN 202111639226A CN 114228426 A CN114228426 A CN 114228426A
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- 239000000725 suspension Substances 0.000 title claims abstract description 43
- 238000003825 pressing Methods 0.000 claims description 21
- 239000007789 gas Substances 0.000 description 115
- 239000003921 oil Substances 0.000 description 57
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- 238000006073 displacement reaction Methods 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 3
- 239000010720 hydraulic oil Substances 0.000 description 3
- 230000003139 buffering effect Effects 0.000 description 2
- 238000000354 decomposition reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000002452 interceptive effect Effects 0.000 description 2
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- 238000005065 mining Methods 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 230000004044 response Effects 0.000 description 2
- 230000035939 shock Effects 0.000 description 2
- 241001391944 Commicarpus scandens Species 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000001154 acute effect Effects 0.000 description 1
- 230000001174 ascending effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005253 cladding Methods 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000009191 jumping Effects 0.000 description 1
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- 238000003754 machining Methods 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G11/00—Resilient suspensions characterised by arrangement, location or kind of springs
- B60G11/26—Resilient suspensions characterised by arrangement, location or kind of springs having fluid springs only, e.g. hydropneumatic springs
- B60G11/28—Resilient suspensions characterised by arrangement, location or kind of springs having fluid springs only, e.g. hydropneumatic springs characterised by means specially adapted for attaching the spring to axle or sprung part of the vehicle
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G11/00—Resilient suspensions characterised by arrangement, location or kind of springs
- B60G11/26—Resilient suspensions characterised by arrangement, location or kind of springs having fluid springs only, e.g. hydropneumatic springs
- B60G11/265—Resilient suspensions characterised by arrangement, location or kind of springs having fluid springs only, e.g. hydropneumatic springs hydraulic springs
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G11/00—Resilient suspensions characterised by arrangement, location or kind of springs
- B60G11/26—Resilient suspensions characterised by arrangement, location or kind of springs having fluid springs only, e.g. hydropneumatic springs
- B60G11/30—Resilient suspensions characterised by arrangement, location or kind of springs having fluid springs only, e.g. hydropneumatic springs having pressure fluid accumulator therefor, e.g. accumulator arranged in vehicle frame
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Vehicle Body Suspensions (AREA)
Abstract
The invention relates to the technical field of vehicles, in particular to a rear oil-gas suspension assembly and a vehicle. The rear oil-gas suspension assembly comprises a first oil-gas spring and a second oil-gas spring, and the first oil-gas spring is arranged at one end of the middle bridge; the second oil gas spring is arranged at one end of the rear axle, and the first oil gas spring and the second oil gas spring are positioned at the same side of the frame; the first oil gas spring is arranged on one side, close to the rear axle, of the middle axle, and the second oil gas spring is arranged on one side, far away from the middle axle, of the rear axle. Because the existing oil-gas spring is usually arranged at the top of the axle and the stroke is short, the first oil-gas spring provided by the embodiment of the invention is arranged at one side of the middle axle close to the rear axle, and the second oil-gas spring is arranged at one side of the rear axle far away from the middle axle. This setting can make the stroke extension of gas spring for prior art to when making the vehicle pass through pothole road surface, can make the difference in height increase of wheel about well axle and the rear axle, improve the maximum balance pivot angle of well axle and rear axle, reduce the unsettled possibility of unilateral, thereby improve the road surface trafficability characteristic of this vehicle.
Description
Technical Field
The invention relates to the technical field of vehicles, in particular to a rear oil-gas suspension assembly and a vehicle.
Background
The suspension is an important part of the vehicle, has the functions of connecting an axle frame and buffering ground impact, and also has important functions on the smoothness and trafficability of the vehicle. With the development of mining machinery, large-tonnage wide-body mining dump trucks begin to gradually apply oil-gas balanced suspensions.
At present, for a multi-axle oil-gas balance suspension of an engineering vehicle, if an axle passes through a hollow road surface in the working process, the condition that a left wheel and a right wheel have small height difference to cause suspension of a single-side wheel can occur, so that the problem of poor road surface trafficability is caused.
Therefore, a rear hydro-pneumatic suspension assembly and a vehicle are needed to solve the above technical problems in the prior art.
Disclosure of Invention
A first object of the present invention is to provide a rear hydro-pneumatic suspension assembly that provides road-passing capability for an axle.
In order to achieve the purpose, the invention adopts the following technical scheme:
a rear hydro-pneumatic suspension assembly is provided for connecting a vehicle frame to an axle positioned below the vehicle frame, the axle including a center axle and a rear axle, comprising:
the first oil-gas spring is arranged at one end of the middle bridge;
the second oil-gas spring is arranged at one end of the rear axle, and the first oil-gas spring and the second oil-gas spring are positioned at the same side of the frame;
the first oil-gas spring is arranged on one side, close to the rear axle, of the middle axle, and the second oil-gas spring is arranged on one side, far away from the middle axle, of the rear axle.
As a preferable technical solution of the rear hydro-pneumatic suspension assembly, the first hydro-pneumatic spring is hinged to the frame and the intermediate axle, and the second hydro-pneumatic spring is hinged to the frame and the rear axle.
As a preferable technical scheme of the rear oil-gas suspension assembly, the rear oil-gas suspension assembly further comprises a middle A-shaped frame and a rear A-shaped frame, wherein the middle A-shaped frame is respectively connected with the frame and the middle axle, the rear A-shaped frame is respectively connected with the frame and the rear axle, and the height of a connecting point of the middle A-shaped frame and the frame is smaller than that of a connecting point of the rear A-shaped frame and the frame.
As a preferable technical scheme of the rear oil-gas suspension assembly, the rear oil-gas suspension assembly further comprises a cross pull rod, the frame and the middle axle as well as the frame and the rear axle are connected through the cross pull rod, the transverse pull rod comprises a rod body and mounting seats which are arranged at the two ends of the rod body and have circular cross sections, the two mounting seats are arranged in a central symmetry manner relative to the central axis of the rod body in the width direction, the side wall of the mounting seat is connected with the side wall of the bar body, the mounting seat arranged at the first end of the bar body is arranged to protrude out of the first side wall of the bar body, and the side wall of the mounting seat arranged at the first end of the rod body is tangent to the second side wall of the rod body, the mounting seat arranged at the second end of the rod body is arranged to protrude out of the second side wall of the rod body, and the side wall of the mounting seat at the second end of the rod body is tangent to the first side wall of the rod body.
As a preferable technical solution of the rear oil-gas suspension assembly, the mounting points of the frame and the tie rods are arranged inside the longitudinal beam of the frame, the mounting points of the intermediate axle and the tie rods are arranged on the rear side of the intermediate axle, and the mounting points of the rear axle and the tie rods are arranged on the rear side of the rear axle.
As a preferable technical scheme of the rear oil-gas suspension assembly, the rear oil-gas suspension assembly further comprises an energy accumulator, the energy accumulator is mounted on the outer side of the frame, two sides of the energy accumulator are respectively connected with the first oil-gas spring and the second oil-gas spring through oil pipes, and the energy accumulator is obliquely arranged at an included angle relative to the first oil-gas spring and the second oil-gas spring.
As a preferable technical solution of the rear hydro-pneumatic suspension assembly, a distance from a center point of the accumulator to a center point of the first hydro-pneumatic spring is the same as a distance from the center point of the accumulator to a center point of the second hydro-pneumatic spring.
As a preferred technical scheme of the rear oil-gas suspension assembly, the oil pipe is arranged in an S shape.
As a preferable technical scheme of the rear oil-gas suspension assembly, the oil pipe comprises a rubber pipe, a straight-through buckling and pressing joint and a bent buckling and pressing joint, and the straight-through buckling and pressing joint and the bent buckling and pressing joint are respectively arranged at two ends of the rubber pipe.
A second object of the present invention is to provide a vehicle capable of improving the passing performance of the vehicle.
A vehicle is provided including a rear hydro-pneumatic suspension assembly as described above.
The invention has the beneficial effects that:
the rear hydro-pneumatic suspension assembly provided by the invention comprises a first hydro-pneumatic spring and a second hydro-pneumatic spring, wherein the first hydro-pneumatic spring is arranged at one end of a middle bridge; the second oil gas spring is arranged at one end of the rear axle, and the first oil gas spring and the second oil gas spring are positioned at the same side of the frame; the first oil gas spring is arranged on one side, close to the rear axle, of the middle axle, and the second oil gas spring is arranged on one side, far away from the middle axle, of the rear axle. Because the existing oil-gas spring is usually arranged at the top of the axle and the stroke is short, the first oil-gas spring provided by the embodiment of the invention is arranged at one side of the middle axle close to the rear axle, and the second oil-gas spring is arranged at one side of the rear axle far away from the middle axle. This setting can make the stroke extension of gas spring for prior art to when making the vehicle pass through pothole road surface, can make the difference in height increase of wheel about well axle and the rear axle, improve the maximum balance pivot angle of well axle and rear axle, reduce the unsettled possibility of unilateral, thereby improve the road surface trafficability characteristic of this vehicle.
Drawings
FIG. 1 is an elevation view of a rear hydro-pneumatic suspension assembly provided by an embodiment of the present invention;
FIG. 2 is a top view of a rear hydro-pneumatic suspension assembly provided by an embodiment of the present invention;
FIG. 3 is a schematic view of a first perspective connecting structure of an axle and a frame according to an embodiment of the present invention;
FIG. 4 is a schematic view of a first perspective connecting structure of an axle and a frame according to an embodiment of the present invention;
FIG. 5 is an enlarged view of a portion of FIG. 4 at A;
FIG. 6 is a schematic structural diagram of a track rod according to an embodiment of the present invention;
FIG. 7 is a cross-sectional view of FIG. 6;
FIG. 8 is a schematic structural diagram of an hydro-pneumatic balanced suspension system provided by an embodiment of the present invention;
fig. 9 is a sectional view of an accumulator provided by an embodiment of the present invention.
In the figure:
1. a first oil-gas spring; 2. a second gas spring; 3. a medium A-shaped frame; 4. a rear A-shaped frame; 5. a tie rod; 51. A shaft body; 511. a first end; 512. a second end; 513. a first side wall; 514. a second side wall; 52. a mounting seat; 53. a knuckle bearing; 54. a clamp spring; 6. an accumulator; 61. an oil chamber; 611. an oil port; 62. a first air chamber; 63. a first floating piston; 64. a second air chamber; 65. a second floating piston; 7. an oil pipe; 71. A hose; 72. a straight-through buckling and pressing joint; 73. bending and buckling the joint;
100. a stringer; 200. a middle bridge; 300. a rear axle.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, removably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
In the description of the present embodiment, the terms "upper", "lower", "right", etc. are used in an orientation or positional relationship based on that shown in the drawings only for convenience of description and simplicity of operation, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.
Aiming at the problems that the trafficability of the vehicle is poor in the prior art, and especially the height difference of the left wheel and the right wheel of the rear axle is small when the vehicle passes through a pothole road surface, so that the single-side wheels are suspended, the height difference of the left wheel and the right wheel can be improved, the single-side wheels are prevented from being suspended, and the trafficability of the vehicle on the pothole road surface is improved. Specifically, as shown in fig. 1 and 2, the vehicle includes a vehicle frame, an axle located below the vehicle frame, the axle including a middle axle 200 and a rear axle 300, the vehicle frame including two longitudinal beams 100 arranged in parallel, and a rear oil-gas suspension assembly for connecting the vehicle frame and the middle axle 200 and the rear axle 300 located below the vehicle frame.
As shown in fig. 1, specifically, the rear hydro-pneumatic suspension assembly includes a first hydro-pneumatic spring 1 and a second hydro-pneumatic spring 2, the first hydro-pneumatic spring 1 being mounted at one end of a middle axle 200 of the vehicle; the second oil-gas spring 2 is arranged at one end of a rear axle 300 of the vehicle, and the first oil-gas spring 1 and the second oil-gas spring 2 are positioned at the same side of the frame of the vehicle; the first oil-gas spring 1 is disposed on one side of the middle axle 200 close to the rear axle 300, and the second oil-gas spring 2 is disposed on one side of the rear axle 300 far from the middle axle 200.
Because the existing gas spring is usually arranged on the top of the vehicle axle, the stroke is short, and the first gas spring 1 provided in the embodiment of the present invention is arranged on the side of the middle axle 200 close to the rear axle 300, and the second gas spring 2 is arranged on the side of the rear axle 300 far from the middle axle 200. This setting can make the stroke extension of gas spring for prior art to when making the vehicle pass through pothole road surface, can make the difference in height increase of middle axle 200 and rear axle 300 left and right sides wheel, improve the biggest balanced pivot angle of middle axle 200 and rear axle 300, reduce the unsettled possibility of unilateral, thereby improve the road surface trafficability characteristic of this vehicle.
Alternatively, in this embodiment, the first gas spring 1 is pivotally connected to the frame and the center axle 200, respectively, and the second gas spring 2 is pivotally connected to the frame, respectively. Specifically, the top equipartition of first gas spring 1 and second gas spring 2 arranges the side at the frame, the rear side at the axle is arranged to the bottom equipartition of first gas spring 1 and second gas spring 2, this kind of setting can receive first gas spring 1 and the swing of second gas spring 2 behind the impact force when rear axle 300 and well bridge 200 cross the pothole road surface, thereby change the direction with the impact force that rear axle 300 and well bridge 200 received, can know by the decomposition of power, the power of vertical direction becomes little after the impact force decomposition of direction change, and then can reduce the ascending impact of vertical direction.
In addition, as shown in fig. 1 and fig. 2, the rear hydro-pneumatic suspension assembly further comprises a middle a-frame 3 and a rear a-frame 4, wherein the middle a-frame 3 is connected with the vehicle frame and the middle axle 200 respectively, the rear a-frame 4 is connected with the vehicle frame and the rear axle 300 respectively, and the height of the connecting point of the middle a-frame 3 and the vehicle frame is smaller than that of the connecting point of the rear a-frame 4 and the vehicle frame. The connection between the middle A-shaped frame 3 and the rear A-shaped frame 4 and the axle is fixedly connected through bolts, and the connection between the middle A-shaped frame and the axle and the frame are hinged on a support of the frame through a joint bearing 53 and a pin shaft. The middle a-frame 3 restricts the displacement of the middle axle 200 in the front-rear direction, and the load of the middle axle 200 in the front-rear direction is transmitted to the vehicle frame through the middle a-frame 3, the rear a-frame 4 restricts the displacement of the rear axle 300 in the front-rear direction, and the load of the rear axle 300 in the front-rear direction is transmitted to the vehicle frame through the rear a-frame 4. The height of the connection point of the middle A-shaped frame 3 and the vehicle frame is smaller than that of the connection point of the rear A-shaped frame 4 and the vehicle frame, so that the middle A-shaped frame 3 and the rear A-shaped frame 4 are arranged in a non-parallel mode, in the embodiment, the included angle between the middle A-shaped frame 3 and the horizontal plane is basically zero and can be considered to be arranged in a parallel mode, and the middle A-shaped frame 3 is arranged below a transmission shaft in the vehicle. The rear A-shaped frame 4 is arranged above the transmission shaft, the middle A-shaped frame 3 and the rear A-shaped frame 4 are arranged to solve the problem of interference between the rear A-shaped frame 4 and the transmission shaft and the A-shaped frame 3 in the moving process of the vehicle, and the distances from the hinge points of the middle A-shaped frame 3 and the rear A-shaped frame 4 and the vehicle frame to the center line of the axle are the same or similar to ensure that the load lever ratios of the middle axle 200 and the first hydro-pneumatic spring 1 to the load lever ratios of the rear axle 300 and the second hydro-pneumatic spring 2 are the same.
Arrangement of back A type frame 4 can reduce and need rear axle 300 structure, can not make rear axle 300 and well bridge 200 the same arch that exists the below, prevents that rear axle 300 cross-section sudden change and arouse the not good problem of atress to take place, has avoided rear axle 300 cost to improve simultaneously. In addition, the arrangement of the rear a-frame 4 according to the middle a-frame 3 results in a shorter rear a-frame 4, which has an effect on the movement of the axle, whereas the longer the a-frame the better the movement of the axle, and the rear a-frame 4 is located above the drive shaft without interference, which also ensures the length of the rear a-frame 4.
It should be noted that the specific structures of the middle a-frame 3 and the rear a-frame 4 are set according to actual needs, and the shapes of the two frames are different in this embodiment.
In order to solve the technical problem that the offset of the middle axle 200 and the rear axle 300 in the left-right direction is increased when the middle axle and the rear axle bounce up and down due to the increase of the strokes of the first hydro-pneumatic spring 1 and the second hydro-pneumatic spring 2, in the embodiment of the invention, the mounting point of the axle and the tie rod 5 is close to the inner side of the longitudinal beam 100 of the frame as much as possible, and the mounting point of the frame and the tie rod 5 is arranged on the outer side of the frame. That is, the mounting point of the frame and the tie rod 5 is provided inside the side member 100 of the frame, the mounting point of the center axle 200 and the tie rod 5 is provided on the rear side of the center axle 200, and the mounting point of the rear axle 300 and the tie rod 5 is provided on the rear side of the rear axle 300. Therefore, the effective length of the transverse pull rod 5 can be increased, and the lateral displacement of the axle when jumping up and down can be reduced, so that the maximum offset of the axle is reduced, and the stability of the vehicle is improved.
Specifically, in the embodiment of the present invention, each of the first oil-gas spring 1 and the second oil-gas spring 2 includes a cylinder and a piston rod, wherein one end of the piston rod extends into the lower end of the cylinder and can move in the cylinder, the upper end of the cylinder is rotatably connected to the vehicle frame, and the other end of the piston rod is rotatably connected to the vehicle axle, it can be understood that the piston rod of the first oil-gas spring 1 is rotatably connected to the middle axle 200, and the piston rod of the second oil-gas spring 2 is rotatably connected to the rear axle 300.
Specifically, in the present embodiment, as shown in fig. 3 and 4, one end of the tie rod 5 is rotatably connected to the outer side wall of one of the longitudinal beams 100, the other end of the tie rod 5 is rotatably connected to the side of the main reduction casing of the axle away from the longitudinal beam 100, the mounting point of the tie rod 5 to the axle is a first mounting point, and the distance between the first mounting point and the longitudinal beam 100 to which the tie rod 5 is connected is smaller than the distance between the first mounting point and the other longitudinal beam 100. The mounting point of the tie rod 5 and the frame is arranged on the outer side wall of one longitudinal beam 100, the mounting point of the tie rod 5 and the axle is arranged on one side, far away from the longitudinal beam 100, of the main cladding shell of the axle, the distance between the two mounting seats 52 of the tie rod 5 is larger in the connection mode, when the tie rod 5 swings up and down around the mounting point on the longitudinal beam 100, the left-right displacement of the mounting point, on which the tie rod 5 is arranged on the axle, is smaller, the offset is smaller, and the stability of the vehicle and the service life of the tire are correspondingly prolonged.
As shown in fig. 6 and 7, the tie rod 5 includes a shaft 51 and mounting seats 52 which are arranged at two ends of the shaft 51 and have circular cross sections, the two mounting seats 52 are arranged in central symmetry, the side walls of the mounting seats 52 are connected with the side walls of the shaft 51, the mounting seat 52 arranged at the first end 511 of the shaft 51 protrudes from the first side wall 513 of the shaft 51, the side wall of the mounting seat 52 arranged at the first end 511 of the shaft 51 is tangent to the second side wall 514 of the shaft 51, the mounting seat 52 arranged at the second end 512 of the shaft 51 protrudes from the second side wall 514 of the shaft 51, and the side wall of the mounting seat 52 arranged at the second end 512 of the shaft 51 is tangent to the first side wall 513 of the shaft 51. As shown in fig. 5, the second end 512 of the tie rod 5 is disposed on the mounting seat 52 and protrudes from the axle side, that is, the tie rod 5 and the mounting seat 52 mounted on the axle protrude toward the axle, and the tie rod 5 and the mounting seat 52 mounted on the frame protrude toward the frame, so that the tie rod 5 can be effectively prevented from interfering with the frame and the axle at the limit position.
According to the track rod 5 provided by the embodiment of the invention, as one of the mounting seats 52 arranged at the two ends of the rod body 51 is arranged to protrude from the first side wall 513 of the rod body 51, the space formed between the rod body 51 and the mounting seat 52 can avoid the structure on the axle, so that the track rod 5 and the axle are prevented from generating interference to cause deformation failure; and the other second side wall 514 which protrudes out of the shaft 51 is arranged, so that the space formed between the shaft 51 and the mounting seat 52 can avoid the structure on the vehicle frame, and the cross rod 5 is prevented from interfering with the vehicle frame to cause deformation failure, thereby ensuring the overall stability of the vehicle. In addition, the side wall of the mounting seat 52 arranged at the first end 511 of the shaft 51 is tangent to the second side wall 514 of the shaft 51, and the side wall of the mounting seat 52 arranged at the second end 512 of the shaft 51 is tangent to the first side wall 513 of the shaft 51, so that stress concentration at the joint of the shaft 51 and the mounting seat 52 can be prevented, the structure of the vehicle frame can be avoided, and the interference of the whole tie rod 5 to the vehicle frame can be prevented.
It will be appreciated that in this embodiment, the line between the centres of the two mounting seats 52 is at an acute angle to the central axis of the length of the shaft 51, so as to ensure that the junction between the shaft 51 and the mounting seat 52 does not deform or break after a large impact is applied to the track rod 5.
Alternatively, in the embodiment of the present invention, the portion of the mounting seat 52 protruding from the shaft 51 is smoothly connected with the shaft 51. The rod body 51 is smoothly connected with the mounting seat 52 through a large arc, so that stress concentration can be avoided, the problem that the tie rod 5 is easy to break in the working process is prevented, and the stability of the vehicle is further improved. Further, in the embodiment of the present invention, the shaft 51 and the mount 52 are of a one-piece structure. The structure is convenient to manufacture, no obvious connection exists between the mounting seat 52 and the shaft body 51, the problem that the connection part is broken due to stress concentration at the connection part of the mounting seat 52 and the shaft body 51 is solved, and the stability of the shaft body 51 and the mounting seat 52 is further improved.
In this embodiment, in order to make the shaft 51 and the mount 52 have a stress structure such as an equal cross section, as shown in fig. 7, the thickness of the shaft 51 is the same as the thickness of the two mounts 52. This definition can facilitate the thickness of the shaft 51 and the thickness of the mount 52 to be the same, while the width D of the shaft 51 is the same throughout. Compared with a non-equal-thickness tie rod 5 structure, the structure is easier to process, and can be obtained by directly blanking a steel plate with equal thickness to produce a blank and then machining the blank.
In order to enable the shaft 51 to swing relative to the frame and the axle after the vehicle is subjected to a large shock, the tie rod 5 in this embodiment further includes a knuckle bearing 53, a mounting hole is provided in the mounting seat 52, and the knuckle bearing 53 is provided in the mounting hole. After the vehicle is subjected to large vibration, the rod body 51 can flexibly rotate by virtue of the joint bearing 53 arranged in the mounting hole, and the rod body 51 is prevented from deforming, breaking and failing due to large impact force.
Further, with reference to fig. 7, in the embodiment of the present invention, the mounting hole is a stepped hole, the tie rod 5 further includes a snap spring 54, the snap spring 54 and the knuckle bearing 53 are both disposed in the large hole of the stepped hole, and the knuckle bearing 53 abuts against the bottom wall of the large hole and the snap spring 54, respectively. In order to limit the clamp spring 54, a limiting groove is further formed in the hole wall of the large hole, and the clamp spring 54 is arranged in the limiting groove. Of course, in other embodiments of the present invention, the mounting hole and the spherical plain bearing 53 may be connected by interference fit.
Specifically, with continued reference to fig. 1, the hydro-pneumatic balanced suspension system further includes an energy accumulator 6, the energy accumulator 6 is installed outside the frame of the vehicle, two ends of the energy accumulator 6 are respectively connected to the first hydro-pneumatic spring 1 and the second hydro-pneumatic spring 2 through oil pipes 7, and the energy accumulator 6 is inclined at an included angle with respect to the first hydro-pneumatic spring 1 and the second hydro-pneumatic spring 2. The first gas spring 1 and the second gas spring 2 are both arranged vertically with respect to the vehicle.
In the embodiment of the invention, the energy accumulator 6 is respectively connected with the first oil-gas spring 1 and the second oil-gas spring 2, so that the pressure in two chambers of the first oil-gas spring 1 and the second oil-gas spring 2 close to a frame can be ensured to be equal at any moment, and therefore, no matter any one side of the middle axle 200 and the rear axle 300 is impacted, the two sides can share the impact load in the fastest time, and the peak value of the impact load of a single axle is reduced; in addition, energy storage 6 is the contained angle slope setting and installs in the frame outside, can increase the interval of the guide mechanism of energy storage 6 and vehicle and the packing box of vehicle, the convenient maintenance of aerifing to energy storage 6, make the oil circuit of first oil gas spring 1 and second oil gas spring 2 avoid the quarter bend when passing through energy storage 6 simultaneously, make more smooth-going the passing through of fluid, and the response speed is improved, thereby further reduce the impact that the frame received, the ride comfort of vehicle is improved, the solution is because of the untimely unsettled problem of axle of response, the balance function of mechanical structure suspension has really been realized.
As shown in fig. 8, the energy accumulator 6 is disposed between the first oil-gas spring 1 and the second oil-gas spring 2, and if the distance between the first oil-gas spring 1 and the energy accumulator 6 is smaller than the distance between the second oil-gas spring 2 and the energy accumulator 6, an oil path between the first oil-gas spring 1 and the energy accumulator 6 is too long, and the amount of expansion of the first oil-gas spring 1 and the second oil-gas spring 2 is greatly deviated, resulting in poor stability, and therefore, in the embodiment of the present invention, the distance from the central point of the energy accumulator 6 to the central point of the first oil-gas spring 1 is the same as the distance from the central point of the energy accumulator 6 to the central point of the second oil-gas spring 2.
Optionally, in the present embodiment, the included angle a of the accumulator 6 is inclined by an included angle in the range of 40 ° to 50 °. Preferably, the angle a is 45 °. Of course, the included angle a may also be 40 °, 41 °, 42 °, 43 °, 44 °, 46 °, 47 °, 48 °, 49 °, or 50 ° in other embodiments.
When the vehicle bears certain mass, the gas in the energy accumulator 6 can be compressed by oil liquid, so that the purpose that the energy accumulator 6 shares the bearing capacity of the vehicle is realized, the expansion amount of the first oil-gas spring 1 and the second oil-gas spring 2 is reduced, the height difference of the vehicle in the empty and full load state is reduced, the running stability of the vehicle is improved, and the comfort of the vehicle is improved. The energy accumulator 6 is arranged at the outer side of the frame, because the vibration of the side is smaller than that of the side close to the middle axle 200 and the rear axle 300, the connection tightness of the energy accumulator 6 and the oil pipe 7 can be ensured, the probability of oil leakage is reduced, and the maintenance times are reduced; besides, the energy accumulator 6 can also play a role in shock absorption and buffering.
Alternatively, in an embodiment of the present invention, each of the first and second gas springs 1 and 2 includes a rodless chamber, a rod chamber, and a piston, and the rodless chamber and the rod chamber are located on both sides of the piston. The energy storage ware 6 passes through oil pipe 7 and is connected with the rodless chamber of first gas spring 1, energy storage ware 6 passes through oil pipe 7 and is connected with the rodless chamber of second gas spring 2, can make two cavities of first gas spring 1 and second gas spring 2 that are close to the frame guarantee pressure constantly equal, thereby no matter arbitrary one side receives the impact in well bridge 200 and rear axle 300, both sides homoenergetic shares impact load with the fastest time, reduce single-axle impact load peak value, thereby further reduce the impact that the frame received, further improve the ride comfort of vehicle.
Alternatively, in an embodiment of the present invention, with continued reference to FIG. 8, the tubing 7 is in an S-shaped configuration. Specifically, the oil pipe 7 comprises a rubber pipe 71, a straight-through buckling and pressing joint 72 and a bent buckling and pressing joint 73, wherein the straight-through buckling and pressing joint 72 and the bent buckling and pressing joint 73 are respectively arranged at two ends of the rubber pipe 71. The buckling and pressing joint 73 can avoid the problem that oil cannot smoothly pass through the oil port 611 of the energy accumulator 6 due to the fact that the right-angle bending is blocked. The bending buckling and pressing joint 73 is a 135-degree bending buckling and pressing joint, which is selected according to the inclination angle of the energy accumulator 6, and the inclination angle of the energy accumulator 6 is 45 degrees in the embodiment, so that the buckling and pressing joint is a 135-degree bending buckling and pressing joint. In other embodiments, the angle of the buckling-pressing joint 73 is selected according to actual needs. The bent buckling and pressing joint 73 is connected with the energy accumulator 6, and the straight buckling and pressing joint 72 is connected with the first oil-gas spring 1 or the second oil-gas spring 2 connected with the oil pipe 7.
Alternatively, in the embodiment of the present invention, as shown in fig. 9, the accumulator 6 includes an oil chamber 61, and the two oil ports 611 of the oil chamber 61 are respectively communicated with the first oil-gas spring 1 and the second oil-gas spring 2 through the two oil pipes 7. The oil in the rodless chamber of the first gas spring 1 can enter the rodless chamber of the second gas spring 2 through the oil pipe 7 and the oil chamber 61, or the oil in the rodless chamber of the second gas spring 2 can enter the rodless chamber of the first gas spring 1 through the oil pipe 7 and the oil chamber 61.
The accumulator 6 further includes a first air chamber 62, the first air chamber 62 being located at one side of the oil chamber 61 and connected to the oil chamber 61 through a first floating piston 63, the first floating piston 63 being capable of compressing oil in the oil chamber 61 or compressing gas in the first air chamber 62. Preferably, the first air chamber 62 is a low-pressure air chamber, and the air filled inside the first air chamber 62 is a low-pressure air. When the vehicle is loaded, the oil can act on the first floating piston 63 through the oil chamber 61 to compress the gas in the first air chamber 62, thereby achieving the purpose of sharing the vehicle load capacity.
The accumulator 6 further includes a second air chamber 64, the second air chamber 64 being located on the other side of the oil chamber 61 and connected to the oil chamber 61 by a second floating piston 65, the second floating piston 65 being capable of compressing oil in the oil chamber 61 or compressing gas in the second air chamber 64. Preferably, the second gas chamber 64 is a high-pressure gas chamber, and the gas filled inside the second gas chamber 64 is a high-pressure gas. When the vehicle is loaded, the oil can act on the second floating piston 65 through the oil chamber 61 to compress the gas in the second air chamber 64, thereby achieving the purpose of sharing the vehicle load capacity.
In the present embodiment, the gas filled in the first and second gas chambers 62 and 64 is nitrogen gas. It should be noted that the specific pressure values of the low-pressure gas and the high-pressure gas are set according to the unloaded state and the loaded state of the actual vehicle, and the pressure values of the vehicles of different models are different, and are not specifically limited herein.
When the middle axle 200 and the rear axle 300 are not subjected to a force, the pressures of the hydraulic oil in the oil chamber 61 and the rodless chamber communicating with the oil chamber 61 are both made zero. When the vehicle is in an idling state, the pressure of hydraulic oil in the oil chamber 61 and the rodless chamber communicating with the oil chamber 61 is only greater than the nitrogen pressure of the first air chamber 62 (i.e., the low-pressure air chamber), the first floating piston 63 is pushed away from the oil chamber 61, and the first air chamber 62 starts to function; when the vehicle is in a full-load state, the pressure of the hydraulic oil in the oil chamber 61 and the rodless chamber communicating with the oil chamber 61 is greater than the nitrogen pressure of the second gas chamber 64 (i.e., the high-pressure gas chamber), pushing the first floating piston 63 and the second floating piston 65 away from the oil chamber 61 at the same time, and the first gas chamber 62 and the second gas chamber 64 acting at the same time.
The first oil-gas spring 1 and the second oil-gas spring 2 which are arranged on the same side of the middle axle 200 and the rear axle 300 share one energy accumulator 6, the loads of the first oil-gas spring 1 and the second oil-gas spring 2 which are arranged on the same side of the middle axle 200 and the rear axle 300 are the same, and when one of the oil-gas springs is impacted, the other oil-gas spring on the same side is separated through the oil pipe 7 and the energy accumulator 6. The energy accumulator 6 adopts a high-low pressure double-air chamber structure, so that the height difference of an oil-gas spring when the air is fully loaded is reduced, and the comfort and the stability of the vehicle are improved.
In the embodiment, the rear A-type frame 4 and the middle A-type frame 3 are used for limiting the degree of freedom of the axle in the front-rear direction, the transverse pull rod 5 is used for limiting the degree of freedom of the axle in the left-right direction, the gas spring is used for limiting the degree of freedom of the axle in the up-down direction, and through the combined mode of the A-type frame, the transverse pull rod 5 and the gas spring, the axle can be subjected to position deviation in the working process, the overall stability of a vehicle is guaranteed, and the vehicle can stably run.
In addition, the foregoing is only the preferred embodiment of the present invention and the technical principles applied. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims (10)
1. A rear hydro-pneumatic suspension assembly for connecting a vehicle frame to an axle located beneath the vehicle frame, the axle including a center axle (200) and a rear axle (300), comprising:
a first oil-gas spring (1) mounted at one end of the intermediate axle (200);
the second oil-gas spring (2) is installed at one end of the rear axle (300), and the first oil-gas spring (1) and the second oil-gas spring (2) are located on the same side of the frame;
the first oil-gas spring (1) is arranged on one side, close to the rear axle (300), of the middle axle (200), and the second oil-gas spring (2) is arranged on one side, far away from the middle axle (200), of the rear axle (300).
2. Rear hydro-pneumatic suspension assembly according to claim 1, characterized in that the first hydro-pneumatic spring (1) is pivotally connected to the frame and the intermediate axle (200), respectively, and the second hydro-pneumatic spring (2) is pivotally connected to the frame and the rear axle (300), respectively.
3. Rear hydro-pneumatic suspension assembly according to claim 1, characterized in that it further comprises a middle a-frame (3) and a rear a-frame (4), said middle a-frame (3) being connected to said frame and said middle axle (200), respectively, said rear a-frame (4) being connected to said frame and said rear axle (300), respectively, the height of the connection point of said middle a-frame (3) and said frame being smaller than the height of the connection point of said rear a-frame (4) and said frame.
4. The rear oil-gas suspension assembly according to claim 1, characterized by further comprising a tie rod (5), wherein the frame and the intermediate axle (200) and the frame and the rear axle (300) are connected through the tie rod (5), the tie rod (5) comprises a rod body (51) and mounting seats (52) which are arranged at two ends of the rod body (51) and have circular cross sections, the two mounting seats (52) are arranged in central symmetry relative to a central axis of the width direction of the rod body (51), the side wall of the mounting seat (52) is connected with the side wall of the rod body (51), the mounting seat (52) arranged at the first end (511) of the rod body (51) is arranged to protrude out of the first side wall (513) of the rod body (51), and the side wall of the mounting seat (52) arranged at the first end (511) of the rod body (51) is arranged to be tangent to the second side wall (514) of the rod body (51), the mounting seat (52) arranged at the second end (512) of the shaft (51) is arranged to protrude from the second side wall (514) of the shaft (51), and the side wall of the mounting seat (52) at the second end (512) of the shaft (51) is arranged to be tangent to the first side wall (513) of the shaft (51).
5. A rear hydro-pneumatic suspension assembly as claimed in claim 4, wherein the mounting points of the frame and the track rods (5) are arranged on the inner side of the longitudinal beams (100) of the frame, the mounting points of the intermediate axle (200) and the track rods (5) are arranged on the rear side of the intermediate axle (200), and the mounting points of the rear axle (300) and the track rods (5) are arranged on the rear side of the rear axle (300).
6. The rear oil-gas suspension assembly according to claim 1, further comprising an energy accumulator (6), wherein the energy accumulator (6) is installed on the outer side of the frame, two sides of the energy accumulator (6) are respectively connected with the first oil-gas spring (1) and the second oil-gas spring (2) through oil pipes (7), and the energy accumulator (6) is obliquely arranged at an included angle relative to the first oil-gas spring (1) and the second oil-gas spring (2).
7. Rear hydro-pneumatic suspension assembly according to claim 6, characterized in that the distance from the accumulator (6) centre point to the first hydro-pneumatic spring (1) centre point is the same as the distance from the accumulator (6) centre point to the second hydro-pneumatic spring (2) centre point.
8. Rear hydro-pneumatic suspension assembly according to claim 6, characterized in that the oil pipe (7) is arranged in an S-shape.
9. Rear hydro-pneumatic suspension assembly according to claim 8, characterized in that the oil pipe (7) comprises a rubber hose (71), a straight-through buckling and pressing joint (72) and a buckling and pressing joint (73), the straight-through buckling and pressing joint (72) and the buckling and pressing joint (73) being respectively arranged at two ends of the rubber hose (71).
10. A vehicle comprising a rear hydro-pneumatic suspension assembly as claimed in any one of claims 1 to 9.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111639226.2A CN114228426B (en) | 2021-12-29 | 2021-12-29 | Rear hydro-pneumatic suspension assembly and vehicle |
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| CN202111639226.2A CN114228426B (en) | 2021-12-29 | 2021-12-29 | Rear hydro-pneumatic suspension assembly and vehicle |
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| CN114228426A true CN114228426A (en) | 2022-03-25 |
| CN114228426B CN114228426B (en) | 2024-02-02 |
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| CN202062969U (en) * | 2011-05-27 | 2011-12-07 | 陕西通力专用汽车有限责任公司 | Oil gas hanging system used for rear axle in vehicle |
| JP2018203166A (en) * | 2017-06-08 | 2018-12-27 | 三菱ロジスネクスト株式会社 | Steering device for work vehicle and work vehicle |
| CN112078316A (en) * | 2020-10-16 | 2020-12-15 | 上海图昂科技有限公司 | Novel oil gas suspension mechanism and vehicle |
| CN112622558A (en) * | 2020-12-24 | 2021-04-09 | 临工集团济南重机有限公司 | Oil-gas balance suspension system and vehicle |
| CN113525009A (en) * | 2021-06-04 | 2021-10-22 | 湖北优软汽车科技有限公司 | Two-stage pressure type single swing arm structure oil gas suspension system |
| CN215244215U (en) * | 2021-07-21 | 2021-12-21 | 湖北优软汽车科技有限公司 | Independent oil-gas suspension system for semitrailer |
-
2021
- 2021-12-29 CN CN202111639226.2A patent/CN114228426B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202062969U (en) * | 2011-05-27 | 2011-12-07 | 陕西通力专用汽车有限责任公司 | Oil gas hanging system used for rear axle in vehicle |
| JP2018203166A (en) * | 2017-06-08 | 2018-12-27 | 三菱ロジスネクスト株式会社 | Steering device for work vehicle and work vehicle |
| CN112078316A (en) * | 2020-10-16 | 2020-12-15 | 上海图昂科技有限公司 | Novel oil gas suspension mechanism and vehicle |
| CN112622558A (en) * | 2020-12-24 | 2021-04-09 | 临工集团济南重机有限公司 | Oil-gas balance suspension system and vehicle |
| CN113525009A (en) * | 2021-06-04 | 2021-10-22 | 湖北优软汽车科技有限公司 | Two-stage pressure type single swing arm structure oil gas suspension system |
| CN215244215U (en) * | 2021-07-21 | 2021-12-21 | 湖北优软汽车科技有限公司 | Independent oil-gas suspension system for semitrailer |
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| CN114228426B (en) | 2024-02-02 |
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Address after: No.2676 Kejia Road, high tech Zone, Jinan City, Shandong Province, 250104 Applicant after: Lingong Heavy Machinery Co.,Ltd. Address before: No.2676 Kejia Road, high tech Zone, Jinan City, Shandong Province, 250104 Applicant before: LINGONG GROUP JINAN HEAVY MACHINERY Co.,Ltd. |
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