CN109664706B - Front air suspension with low chassis and automobile - Google Patents
Front air suspension with low chassis and automobile Download PDFInfo
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- CN109664706B CN109664706B CN201811616958.8A CN201811616958A CN109664706B CN 109664706 B CN109664706 B CN 109664706B CN 201811616958 A CN201811616958 A CN 201811616958A CN 109664706 B CN109664706 B CN 109664706B
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- 239000000725 suspension Substances 0.000 title claims abstract description 30
- 239000003381 stabilizer Substances 0.000 claims abstract description 28
- 239000006096 absorbing agent Substances 0.000 claims abstract description 18
- 230000035939 shock Effects 0.000 claims abstract description 18
- 238000003466 welding Methods 0.000 claims description 26
- 230000007704 transition Effects 0.000 claims description 25
- 229910000639 Spring steel Inorganic materials 0.000 claims description 9
- 229910000831 Steel Inorganic materials 0.000 claims description 9
- 229910052751 metal Inorganic materials 0.000 claims description 9
- 239000002184 metal Substances 0.000 claims description 9
- 239000010959 steel Substances 0.000 claims description 9
- 230000033001 locomotion Effects 0.000 claims description 8
- 229910001018 Cast iron Inorganic materials 0.000 claims description 4
- 229910052782 aluminium Inorganic materials 0.000 claims description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 4
- 230000000087 stabilizing effect Effects 0.000 claims description 4
- 238000001125 extrusion Methods 0.000 claims description 2
- 238000005266 casting Methods 0.000 claims 1
- 230000005484 gravity Effects 0.000 abstract description 2
- 230000009191 jumping Effects 0.000 description 9
- 238000005452 bending Methods 0.000 description 4
- 238000005299 abrasion Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 3
- 230000004323 axial length Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 230000002787 reinforcement Effects 0.000 description 2
- 239000013585 weight reducing agent Substances 0.000 description 2
- 230000006399 behavior Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G15/00—Resilient suspensions characterised by arrangement, location or type of combined spring and vibration damper, e.g. telescopic type
- B60G15/08—Resilient suspensions characterised by arrangement, location or type of combined spring and vibration damper, e.g. telescopic type having fluid spring
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
- B60B35/00—Axle units; Parts thereof ; Arrangements for lubrication of axles
- B60B35/003—Steerable axles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G21/00—Interconnection systems for two or more resiliently-suspended wheels, e.g. for stabilising a vehicle body with respect to acceleration, deceleration or centrifugal forces
- B60G21/02—Interconnection systems for two or more resiliently-suspended wheels, e.g. for stabilising a vehicle body with respect to acceleration, deceleration or centrifugal forces permanently interconnected
- B60G21/04—Interconnection systems for two or more resiliently-suspended wheels, e.g. for stabilising a vehicle body with respect to acceleration, deceleration or centrifugal forces permanently interconnected mechanically
- B60G21/05—Interconnection systems for two or more resiliently-suspended wheels, e.g. for stabilising a vehicle body with respect to acceleration, deceleration or centrifugal forces permanently interconnected mechanically between wheels on the same axle but on different sides of the vehicle, i.e. the left and right wheel suspensions being interconnected
- B60G21/055—Stabiliser bars
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D21/00—Understructures, i.e. chassis frame on which a vehicle body may be mounted
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/80—Technologies aiming to reduce greenhouse gasses emissions common to all road transportation technologies
- Y02T10/86—Optimisation of rolling resistance, e.g. weight reduction
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Vehicle Body Suspensions (AREA)
Abstract
The invention belongs to the technical field of automobile chassis, and relates to a front air suspension with a low chassis and an automobile. The front air suspension comprises an air spring, a stabilizer bar integrated with a longitudinal bar, a transverse thrust bar and a shock absorber; the air spring is arranged on the lower side of the frame and is arranged on the front axle through an air spring lower integrated support; the two ends of the stabilizer bar of the integrated longitudinal bar are connected with the air spring lower integrated support, and the middle part is assembled with the connecting support; the lower end of the shock absorber is connected with the air spring lower integrated support, and the upper end of the shock absorber is connected with the frame. The left end of the transverse thrust rod is connected with the air spring lower integrated support, and the right end of the transverse thrust rod is connected with the frame connecting support. An automobile comprises the front air suspension of the low chassis. The invention solves the problem that the conventional 4-bar structure is difficult to arrange in a low chassis vehicle type, reduces the weight and reduces the cost; the local anti-roll capacity of the frame is effectively improved; the vehicle frame can run at the height of 800mm from the ground, the air resistance and the gravity center are reduced simultaneously, and the oil consumption and the dynamic property are synchronously improved.
Description
Technical Field
The invention belongs to the technical field of automobile chassis, and relates to a front air suspension with a low chassis and an automobile matched with the front air suspension with the low chassis.
Background
With the increasing strictness of regulations, the punishment forces of illegal behaviors such as overrun and overspeed are increased, and legal multi-pull fast running becomes the most important problem at present, especially in the field of subdivision of light weight and large volume of goods such as express delivery. The low chassis motorcycle type packing box is low from the ground, and is easier laborsaving when carrying goods to get on or off the vehicle, and lower floor means that vehicle focus is lower, and vehicle driving stability can be better. Most importantly, a larger capacity container can be used to carry more cargo. Of course, the lower chassis affects the trafficability of the vehicle, and many places with road condition deviation cannot pass, so that the vehicle is only suitable for running on expressways and on roads with good road conditions.
The front air suspension of a common chassis truck and passenger car is generally composed of an air spring, 4 longitudinal thrusting rods, 1 transverse thrusting rod, 2 shock absorbers and 1 transverse stabilizer rod. Such air suspensions are very mature in application and relatively expensive. When the market segment has demands for a low chassis with the height of 800-900 mm from the ground, the main machine factory loses business opportunity due to the fact that 4 longitudinal thrust rod schemes are difficult to arrange due to the limitation of the distance from the wheel center to the frame.
Disclosure of Invention
An object of the present invention is to provide a front air suspension with a low chassis, which can effectively reduce the chassis height and overall cost. The invention further aims to provide a front air suspension automobile with a low chassis, which realizes express transportation of the light foam with the maximum capacity on a high-speed and good road surface.
A front air suspension of a low chassis comprises an air spring 1, a stabilizer bar 2 integrated with a longitudinal bar, a transverse thrust bar 3 and a shock absorber 4;
the air spring 1 is arranged on the lower side of the frame through an air spring and frame connecting bracket 8 and is arranged on a front axle 15 through an air spring lower integrated support 7;
the two ends of the stabilizer bar 2 of the integrated longitudinal bar are connected with the air spring lower integrated support 7, and the middle is assembled through a bearing cover 9 and a connecting bracket 10;
the lower end of the shock absorber 4 is connected with an air spring lower integrated support 7, and the upper end of the shock absorber is connected with the frame.
The left end of the transverse thrust rod 3 is connected with the air spring lower integrated support 7, and the right end of the transverse thrust rod is connected with the frame connecting bracket 13.
According to the technical scheme, the air spring and frame connecting bracket 8 is formed by welding a U-shaped sheet metal part 8a and a round steel plate 8b, the U-shaped sheet metal part 8a is provided with connecting holes and is connected with a frame, and the round steel plate 8b is matched with the upper cover of the air spring 1 and is padded on the lower wing surface of the frame.
In the technical scheme, the air spring lower integrated support 7 is horizontally arranged by matching a first plane 7a with the bottom surface of the piston of the air spring 1; the second plane 7b is matched with the front shaft 15 support seat; there are a first connecting hole 7c for connecting the air bag, a second connecting hole 7d for connecting the front axle 15, a third connecting hole 7e for connecting the stabilizer bar 2 of the integrated longitudinal bar, a fourth connecting hole 7f for connecting the transverse thrust bar 3, and a fifth connecting hole 7g for connecting the damper 4.
The stabilizer bar 2 of the integrated longitudinal bar in the technical proposal comprises a tubular torsion bar 21, a large knife board 22 and a transition bracket 23; the tubular torsion bar 21 and the large knife plate 22 are welded into a whole after interference through the heart-shaped shaft hole, and are connected with the transition bracket 23 through bolts; the two ends of the stabilizer bar 2 of the integrated longitudinal bar are connected with the air spring lower integrated support 7 through a transition support 23, and the transition support 23 is provided with bolt holes for connecting the air spring lower integrated support 7.
In the technical scheme, the tubular torsion bar 21 is formed by welding a hollow spring steel tube 210 and an integrated end head 211, wherein the integrated end head 211 is provided with a welding surface 211d, a thrust end surface 211c, a heart-shaped end surface 211b and a bearing matching shaft surface 211a; friction welding is performed on the welding surface 211 d; the hollow spring steel tube 210 has a U shape, and the thrust end surface 211c and the heart-shaped end surface 211b restrict the large blade 22 from moving left and right and axially rotating relative to the tubular torsion bar 21, respectively.
In the technical scheme, the large knife plate 22 is provided with a heart-shaped connecting hole 22a, a quadrilateral weight-reducing hole 22b and a transition bracket first connecting hole 22c; the number of the quadrilateral weight reducing holes 22b is 3, and the upper edge and the lower edge are parallel to the outline of the large cutter plate 22; the first connecting holes 22c of the transition brackets are arranged in an up-down <' > shape, and the number of the first connecting holes is 4 from front to back;
the length of the large knife board 22 is 550-650 mm.
In the technical scheme, the transverse thrust rod 3 is provided with a transverse thrust rod joint A3a and a transverse thrust rod joint B3B; the transverse thrust rod joint A3a and the transverse thrust rod joint B3B are respectively embedded into rubber bearings to isolate vibration and reduce noise, the middle part is an arc I-shaped beam structure 3c, and the transverse thrust rod 3 is integrally manufactured by extrusion cast aluminum or high-strength cast iron.
In the technical scheme, the connecting brackets 10 are positioned on two sides of a longitudinal beam on the front side of the frame and are connected with a frame supporting beam 11;
the transverse thrust rod and the frame connecting bracket 13 are positioned at the rear side of the frame and are connected with the frame connecting bracket 14 through the transverse pulling plate 5 and the transverse pulling plate;
the frame support beam 11 is formed by a pipe beam 11a and a four-hole bracket 11b through two friction welding seams 11 c;
the connecting bracket 10 is provided with a stabilizing rod 2 of which the first connecting hole 10a of the connecting bracket is matched with the integrated longitudinal rod, a second connecting hole 10b of the connecting bracket is connected with the frame and matched with the lower wing surface of the frame, a third connecting hole 10c of the connecting bracket is connected with a frame supporting beam 11, and a groove 10d is formed;
the transverse thrust rod is connected with the frame through a bracket first connecting hole 13a arranged on the bracket connecting bracket 13, the transverse thrust rod 3 is connected through a bracket second connecting hole 13b arranged on the bracket connecting bracket, and the transverse pulling plate 5 is connected through a bracket third connecting hole 13c arranged on the bracket connecting bracket.
An automobile comprises a front steering shaft assembly comprising a front shaft 15, a knuckle arm 16, a tie rod 17 and a brake chamber 18, comprising the low chassis front air suspension.
In the technical scheme, the drop height of the front shaft 15 is 125-130 mm.
The beneficial effects of the invention are as follows:
1. the front air suspension of the low chassis disclosed by the invention has the advantages that 2 upper longitudinal thrusting rods are eliminated, and the original lower longitudinal thrusting rods and the transverse stabilizer rods are integrated, so that the problem that the conventional 4-rod structure is difficult to arrange in a low chassis vehicle type (the distance between the upper rod and the lower rod is very short, and the design of a lower integrated seat is difficult) is solved, and the weight and the cost are reduced;
2. according to the front air suspension with the low chassis, the air bag is arranged on the lower side of the frame, so that the risk of high trial production cost caused by the change of the vehicle body outside the frame is avoided, and even the hard points of the upper connecting bracket and the lower connecting bracket of the air bag are more compact and lighter;
3. the front air suspension with the low chassis has the advantages that the control of the length interval of the longitudinal stabilizer bar is beneficial to guaranteeing the service life of torsion and transverse warping of the rubber bearing; the design of the large length of the transverse thrust rod is beneficial to reducing the transverse movement of the axle in the up-and-down jumping process of the wheels and reducing the abrasion of tires.
4. According to the low chassis automobile, the front side and the rear side of the frame are respectively connected with the longitudinal beams on the two sides through the supporting beams and the transverse pulling plates, so that the local anti-rolling capacity of the frame is effectively improved;
5. the invention relates to a low chassis automobile, which comprises a large drop front axle, a small-size knuckle arm, a U-shaped concave steering tie rod and an upper brake air chamber. On the basis of meeting the trafficability of high speed and good road surfaces, the front axle is ensured not to interfere with the motion of the related parts such as the suspension, the frame, the power assembly and the like;
6. the automobile with the low chassis can realize running in a state that the height of the frame from the ground is 800mm, simultaneously reduces air resistance and gravity center, and synchronously improves oil consumption and dynamic property.
Drawings
FIG. 1 is a schematic view of a front air suspension of a low chassis according to the present invention;
FIG. 2a is a schematic view of an air spring and upper and lower connecting brackets according to the present invention;
FIG. 2b is a schematic diagram showing the connecting hole positions of the air spring and the upper and lower connecting brackets according to the present invention;
FIG. 3 is a schematic view of an air spring and an upper and lower connecting bracket structure 2 according to the present invention;
FIG. 4 is a schematic view of a stabilizer bar according to the present invention;
FIG. 5 is a schematic view of a tubular torsion bar construction according to the present invention;
FIG. 6a is a schematic view of an integrated tip structure according to the present invention 1;
FIG. 6b is a schematic view of an integrated tip structure according to the present invention;
FIG. 7 is a schematic view of a large blade structure according to the present invention;
FIG. 8 is a schematic view of the front end of the frame according to the present invention;
FIG. 9 is a schematic view of the rear end of the frame according to the present invention;
FIG. 10 is a schematic view of a front steering axle assembly of a low chassis vehicle according to the present invention;
FIG. 11 is a schematic view of a front air suspension of a low chassis according to the present invention;
wherein: 01-a transverse stabilizer bar; 02-longitudinal thrust rod
1-an air spring; 2-a stabilizer bar integrated with the longitudinal bar; 3-a transverse thrust rod; 4-a damper; 5-a transverse pulling plate; 6-height valve; 7-an air spring lower integrated support; 8-connecting the air spring with the frame; 9-a bearing cap; 10-connecting a bracket; 11-a frame support beam; 12-a damper upper bracket; 13-connecting the transverse thrust rod with the frame; 14-connecting the transverse pulling plate with the frame; 15-front axle; 16-knuckle arm; 17-tie rod; 18-a brake chamber;
21-a tubular torsion bar; 22-large knife board; 23-transition support
3 a-a transverse thrust rod joint a;3b—a transverse thrust rod joint B;3 c-an arc-shaped I-beam structure;
7 a-a first plane; 7 b-a second plane; 7 c-a first connection hole; 7 d-a second connection hole; 7 e-a third connection hole; 7 f-fourth connecting holes; 7 g-fifth connecting hole; 7 h-bottom of the groove with high left and low right;
8 a-a sheet metal part in a shape like a Chinese character 'ji'; 8 b-a round steel plate;
10 a-a first connection hole of the connection bracket; 10 b-a second connection hole of the connection bracket; 10 c-a third connecting hole of the connecting bracket; 10 d-groove; 11 a-a tubular beam; 11 b-four-hole scaffold; 11 c-weld;
13 a-a bracket first connection hole; 13 b-bracket second connection hole; 13 c-a third connection hole of the bracket;
22 a-chicken heart connecting holes; 22 b-quadrilateral weight-reducing holes; 22 c-a first connection hole of the transition support;
210-hollow spring steel tube; 211-an integrated tip;
211 a-mating surface of the bearing; 211 b-chicken heart end face; 211 c-thrust end face; 211 d-welding surface.
Detailed Description
This embodiment is a basic version of the invention, and examples of implementation are shown in fig. 1-11.
Referring to fig. 1, the invention provides a front air suspension with a low chassis, which comprises an air spring 1, a stabilizer bar 2 integrated with a longitudinal bar, a transverse thrust bar 3 and a shock absorber 4.
The air spring 1 is mounted to the underside of the frame via an air spring and frame attachment bracket 8 and to the front axle 15 via an air spring lower integrated mount 7.
The stabilizer bar 2 of the integrated longitudinal bar is connected at both ends with the support 7 by means of a transition bracket 23 and is assembled in the middle with the bracket 10 by means of a bearing cap 9.
Referring to fig. 2b, the lower end of the shock absorber 4 is connected to the air spring lower integrated support 7 through a fifth connection hole 7g, and the upper end is connected to the frame through a shock absorber upper bracket 12.
The left end of the transverse thrust rod 3 is connected with a third connecting hole 7f of the air spring lower integrated bracket, and the right end is connected with a second connecting hole 13b of the bracket, and the left side is high and the right side is low.
The air spring 1 is a multi-curved air bag and can be matched with an auxiliary air chamber so as to meet the requirement of the front end comfort of the whole automobile on the order of 1.2 Hz. Referring to fig. 2a, the air spring and frame connecting bracket 8 is formed by welding a metal plate 8a shaped like a Chinese character 'ji' and a circular steel plate 8b, the metal plate 8a shaped like a Chinese character 'ji' is provided with a connecting hole to be connected with the frame, and the circular steel plate 8b is matched with the upper cover of the air spring 1 and is padded on the lower wing surface of the frame. Preferably, an auxiliary support bracket is arranged on the inner side of the frame to avoid overlarge bending deformation of the inner side of the air bag.
Referring to fig. 3, the air spring lower integrated support 7, the first plane 7a is horizontally arranged in cooperation with the bottom surface of the piston of the air spring 1; referring to fig. 2a, the second flat surface 7b is in abutment with the front axle 15. Referring to fig. 2b, a first connection hole 7c is provided to connect the airbag, and a second connection hole 7d is connected to the front shaft 15; referring to fig. 2a, the third connecting hole 7e is connected to the stabilizer bar 2 of the integrated longitudinal bar, the fourth connecting hole 7f is connected to the lateral thrust bar 3, and the fifth connecting hole 7g is connected to the damper 4.
Referring to fig. 2a, the third connecting hole 7e of the air spring lower integrated support is characterized by being H-shaped, so as to realize weight reduction; and the fourth connecting hole 7f is low in the groove and high in the outside, so that the length of the transverse thrust rod is increased to the greatest extent on the basis of meeting the jumping stroke, and the torsion angle of the embedded rubber bearing is reduced.
Referring to fig. 4, the front air suspension with a low chassis, the integrated longitudinal rod stabilizer bar 2 comprises a tubular torsion bar 21, a large knife board 22 and a transition bracket 23. The tubular torsion bars 21 and 22 are firstly welded into a whole after interference through the heart-shaped shaft holes, and then are connected with the transition bracket 23 through bolts. The transition bracket 23 is provided with 3 bolt holes for connecting the air spring lower integrated support 7.
Referring to fig. 5, the tubular torsion bar 21 is formed by welding a hollow spring steel pipe 210 and an integrated head 211, and friction welding is performed on a welding surface 211 d. The hollow spring steel tube is U-shaped, and referring to fig. 6a and 6b, the integrated end 211 is provided with a welding surface 211d, a thrust end surface 211c, a heart-shaped end surface 211b and a bearing mating shaft surface 211a. The thrust end 211c and the heart-shaped end 211b limit the left-right movement and axial rotation of the large knife plate 22 relative to the tubular torsion bar 21.
Referring to fig. 7, the large blade 22 is provided with a heart-shaped connecting hole 22a, a quadrilateral weight-reducing hole 22b and a transition bracket first connecting hole 22c. The number of the quadrilateral weight reducing holes 22b is 3, and the upper edge and the lower edge are parallel to the outline of the large cutter plate 22. The first connecting holes 22c of the transition brackets are arranged in an up-down "<" shape, and the number is 4 from front to back.
More preferably, the large blade 22 is between 550 and 650mm long to meet the requirement that the rubber bushing angle does not exceed a limit, such as 10 degrees, when the wheel is 150mm down.
Referring to fig. 9, the transverse thrust rod 3, the transverse thrust rod joint A3a and the transverse thrust rod joint B3B are respectively embedded into rubber bearings to isolate vibration and reduce noise, the middle is an arc-shaped i-beam structure 3c, and the transverse thrust rod joint is preferably manufactured integrally by extruding cast aluminum or high-strength cast iron, so that the assembly efficiency is higher and the weight is lighter than that of the original joint pipe in a split form.
More preferably, the axial lengths of the transverse thrusting rod 3, the transverse thrusting rod joint A3a and the transverse thrusting rod joint B3B should be as long as possible, so as to reduce the transverse movement of the axle during the up-and-down jumping of the wheel, reduce the abrasion of the tire, and simultaneously form a corner within a reasonable range due to the maximum jumping of the wheel, such as torsion ±15°, prying and bending: 13 deg..
Referring to fig. 1 and 8, the present invention provides a low chassis automotive vehicle to match the front air suspension of a low chassis arrangement. The connecting brackets 10 on the two sides of the longitudinal beam on the front side of the frame are connected with each other through supporting beams 11, and the transverse thrust rods on the rear side of the frame are mutually connected with the frame connecting brackets 13, the transverse pulling plates and the frame connecting brackets 14 through the transverse pulling plates 5. Both belong to the frame reinforcement scheme to avoid the local too big deformation that produces of frame when whole car serious side roll.
Referring to fig. 8, more preferably, the frame support beam 11 is formed by two friction welding welds 11c of a tubular beam 11a and a four-hole bracket 11b, which is simple and inexpensive; the connecting bracket 10 is provided with a stabilizing rod 2 of an integrated longitudinal rod, a connecting bracket first connecting hole 10a of which is matched with the integrated longitudinal rod, a connecting bracket second connecting hole 10b of which is connected with the frame and matched with the lower wing surface of the frame, and a connecting bracket third connecting hole 10c of which is connected with a frame supporting beam 11 and a groove 10d for carrying out light weight based on force transmission law;
referring to fig. 9, the transverse thrust rod and the bracket connecting bracket 13 are respectively provided with bracket first connecting holes 13a for connecting the frames, the number of the transverse thrust rod is 5, and the transverse thrust rod is 2 from top to bottom; the bracket second connecting holes 13b are connected with the transverse thrust rods 3, and the number of the transverse thrust rods is 2; the third connecting holes 13c of the brackets are connected with the transverse pulling plates 5 by 2. The transverse pulling plate is made into a U shape so as to prevent interference with the power assembly when the wheels jump downwards.
Referring to fig. 10, the low chassis vehicle of the present invention requires an innovative large drop front steering axle assembly for matching with a low chassis front air suspension. The front steering shaft assembly comprises a large drop front shaft 15, a small-sized knuckle arm 16, a U-shaped concave steering tie rod 17, a brake air chamber 18 and the like.
Preferably, the high drop front axle drop is 125-130 mm to meet the requirements of wheel travel (such as 50mm for upper jump and 150mm for lower jump). The knuckle arm 16 is shortened by 20-30 mm compared with conventional ones to ensure no motion interference with the air bag. The groove depth of the steering tie rod 17 is 50-70 mm and is not lower than the lowest position of the front axle, so that interference with the air spring lower integrated support 7 is avoided. The brake chamber 18 is positioned above to ensure interference with the tie rod as the wheel rotates.
The embodiment mainly comprises an air spring 1, a stabilizer bar 2 integrated with a longitudinal bar, a transverse thrust bar 3 and a shock absorber 4. The air spring 1 is mounted to the underside of the frame via an air spring and frame attachment bracket 8 and to the front axle 15 via an air spring lower integrated mount 7. The stabilizer bar 2 of the integrated longitudinal bar is connected at both ends with the air spring lower integrated support 7 through a transition bracket 23 (through a third connecting hole 7 e), and is assembled with the connecting bracket 10 through a bearing cover 9 in the middle. The lower end of the shock absorber 4 is connected with the air spring lower integrated support 7 through a fifth connecting hole 7g, and the upper end of the shock absorber is connected with the frame through a shock absorber upper bracket 12. The left end of the transverse thrust rod 3 is connected with a fourth connecting hole 7f of the air spring lower integrated support 7, and the right end is connected with a second connecting hole 13b of the bracket, and the left side is high and the right side is low.
The air spring and frame connecting bracket 8 is formed by welding a sheet metal part 8a in a shape like a Chinese character 'ji' and a round steel plate 8b, the sheet metal part 8a in a shape like a Chinese character 'ji' is provided with a connecting hole to be connected with the frame, and the round steel plate 8b is matched with the upper cover of the air spring 1 and is padded on the lower wing surface of the frame. Preferably, an auxiliary support bracket is arranged on the inner side of the frame to avoid overlarge bending deformation of the inner side of the air bag.
The air spring lower integrated support 7 is horizontally arranged in a matched mode with the bottom surface of the piston of the air spring 1 in a first plane 7 a; the second plane 7b is in abutment with the front axle 15. There are a first connecting hole 7c for connecting the air bag, a second connecting hole 7d for connecting the front axle 15, a third connecting hole 7e for connecting the stabilizer bar 2 of the integrated longitudinal bar, a fourth connecting hole 7f for connecting the transverse thrust bar 3, and a fifth connecting hole 7g for connecting the damper 4.
The third connecting hole 7e is characterized by being H-shaped, so that weight reduction is realized; the groove bottom 7h is low in the inside and high in the outside, so that the length of the transverse thrust rod is increased on the basis of meeting the jumping stroke, and the torsion angle of the embedded rubber bearing is reduced.
The stabilizer bar 2 of the low chassis front air suspension comprises a tubular torsion bar 21, a large knife board 22 and a transition bracket 23. The tubular torsion bar 21 and the large knife plate 22 are firstly welded into a whole after interference through the heart-shaped shaft hole, and then are connected with the transition bracket 23 through bolts. The transition bracket 23 is provided with 3 bolt holes for connecting the air spring lower integrated support 7.
The tubular torsion bar 21 is formed by welding a hollow spring steel pipe 210 and an integrated tip 211, and friction welding is performed on a welding surface 211 d. The hollow spring steel tube is U-shaped, and the integrated end 211 is provided with a welding surface 211d, a thrust end surface 211c, a heart-shaped end surface 211b and a matching surface 211a of the bearing. The thrust end surface 211c and the heart-shaped end surface 211b restrict the large blade 22 from moving left and right and axially relative to the tubular torsion bar 21, respectively.
The large knife plate 22 is provided with a heart-shaped connecting hole 22a, a quadrilateral weight-reducing hole 22b and a transition bracket first connecting hole 22c. The number of the quadrilateral weight-reducing holes 22b is 3, and the upper edge and the lower edge are parallel to the profile of the large cutter plate. The first connecting holes 22c of the transition brackets are arranged in an up-down "<" shape, and the number is 4 from front to back.
More preferably, the large blade length is between 550 and 650mm to meet the requirement that the rubber bushing angle does not exceed a limit, such as 10 degrees, when the wheel is 150mm down.
The transverse thrust rod 3, the transverse thrust rod joint A3a and the transverse thrust rod joint B3B are respectively embedded into rubber bearings to isolate vibration and reduce noise, the middle is an arc I-beam structure 3c, and the transverse thrust rod is preferably manufactured integrally by extruding cast aluminum or high-strength cast iron, so that the assembly efficiency is higher and the weight is lighter than that of the original joint pipe in a split type.
More preferably, the axial lengths of the transverse thrusting rod 3, the transverse thrusting rod joint A3a and the transverse thrusting rod joint B3B should be as long as possible, so as to reduce the transverse movement of the axle during the up-and-down jumping of the wheel, reduce the abrasion of the tire, and simultaneously form a corner within a reasonable range due to the maximum jumping of the wheel, such as torsion ±15°, prying and bending: 13 deg..
The invention provides an automobile with a low chassis.A connecting bracket 10 on the front side of a frame is positioned on two sides of a longitudinal beam and is connected with each other through a frame supporting beam 11, and a transverse thrust rod on the rear side of the frame is mutually connected with a frame connecting bracket 13, a transverse pulling plate and a frame connecting bracket 14 through a transverse pulling plate 5. Both belong to the frame reinforcement scheme to avoid the local too big deformation that produces of frame when whole car serious side roll.
More preferably, the frame support beam 11 is formed by friction welding a tube beam 11a and a four-hole bracket 11b through two welding seams 11c, and is simple and cheap; the connecting bracket 10 is provided with a stabilizing rod 2 of an integrated longitudinal rod, a connecting bracket first connecting hole 10a of which is matched with the integrated longitudinal rod, a connecting bracket second connecting hole 10b of which is connected with the frame and matched with the lower wing surface of the frame, and a connecting bracket third connecting hole 10c of which is connected with a frame supporting beam 11 and a groove 10d for carrying out light weight based on force transmission law; the transverse thrust rod and the frame connecting bracket 13 are respectively provided with bracket first connecting holes 13a for connecting the frames, the number of the transverse thrust rod and the frame connecting bracket is 5, and the upper part is 2 and the lower part is 3; the bracket second connecting holes 13b are connected with the transverse thrust rods 3, and the number of the transverse thrust rods is 2; the third connecting holes 13c of the brackets are connected with the transverse pulling plates 5 by 2. The transverse pulling plate is made into a U shape so as to prevent interference with the power assembly when the wheels jump downwards.
The invention relates to a low chassis automobile, which comprises a front steering shaft assembly, a front shaft 15 with large drop, a small-size steering knuckle arm 16 and a U-shaped concave steering tie rod 17.
Preferably, the drop height of the large drop height front axle 15 is 125-130 mm so as to meet the travel requirement of the wheel jumping up by 50mm and the wheel jumping down by 150 mm. The knuckle arm 16 is shortened by 20-30 mm compared with conventional ones to ensure no motion interference with the air bag. The groove depth of the steering tie rod 17 is 50-70 mm and is not lower than the lowest position of the front axle 15, so that interference with the air spring lower integrated support 7 is avoided.
The described embodiments of the invention are some, but not all, embodiments of the invention. It will be apparent to those skilled in the art that modifications or partial technical feature substitutions based on the embodiments may be made without departing from the spirit and scope of the invention. The stabilizer bar 2 of fig. 11, which is a non-integral longitudinal bar, is replaced by a conventional structure of a transverse stabilizer bar 01 and four longitudinal thrusting bars 02, but other structural features are similar to those of the present patent and belong to an embodiment falling within the scope of the appended claims.
Claims (7)
1. A front air suspension of a low chassis, characterized by: comprises an air spring (1), a stabilizer bar (2) integrated with a longitudinal bar, a transverse thrust bar (3) and a shock absorber (4);
the air spring (1) is arranged on the lower side of the frame through an air spring and frame connecting bracket (8), and is arranged on the front axle (15) through an air spring lower integrated support (7);
the two ends of the stabilizer bar (2) of the integrated longitudinal bar are connected with the air spring lower integrated support (7), and the middle is assembled through the bearing cover (9) and the connecting bracket (10);
the lower end of the shock absorber (4) is connected with an air spring lower integrated support (7), and the upper end of the shock absorber is connected with the frame;
the left end of the transverse thrust rod (3) is connected with the air spring lower integrated support (7), and the right end of the transverse thrust rod is connected with the frame connecting bracket (13);
the air spring lower integrated support (7) is horizontally arranged in a matched mode with the bottom surface of the piston of the air spring (1); the second plane (7 b) is matched with the front shaft (15) support; the device is provided with a first connecting hole (7 c) for connecting an air bag, a second connecting hole (7 d) for connecting a front shaft (15), a third connecting hole (7 e) for connecting a stabilizer bar (2) of an integrated longitudinal bar, a fourth connecting hole (7 f) for connecting a transverse thrust bar (3), and a fifth connecting hole (7 g) for connecting a shock absorber (4);
the stabilizer bar (2) of the integrated longitudinal bar comprises a tubular torsion bar (21), a large knife board (22) and a transition bracket (23); the tubular torsion bar (21) and the large knife plate (22) are welded into a whole after interference through the heart-shaped shaft hole, and are connected with the transition bracket (23) through bolts; the two ends of the stabilizer bar (2) of the integrated longitudinal bar are connected with the air spring lower integrated support (7) through a transition bracket (23), and the transition bracket (23) is provided with bolt holes for connecting the air spring lower integrated support (7);
the connecting brackets (10) are positioned on two sides of the longitudinal beam on the front side of the frame and are connected with the frame supporting beam (11);
the transverse thrust rod and the frame connecting bracket (13) are positioned at the rear side of the frame and are connected with the frame connecting bracket (14) through the transverse pulling plate (5) and the transverse pulling plate;
the frame support beam (11) is formed by a pipe beam (11 a) and a four-hole bracket (11 b) through two friction welding seams (11 c);
the connecting bracket (10) is provided with a stabilizing rod (2) of which the first connecting hole (10 a) of the connecting bracket is matched with the integrated longitudinal rod, a second connecting hole (10 b) of the connecting bracket is connected with the frame and matched with the lower wing surface of the frame, a third connecting hole (10 c) of the connecting bracket is connected with a frame supporting beam (11), and a groove (10 d) is formed;
the transverse thrust rod is connected with the bracket through a bracket first connecting hole (13 a) arranged on the bracket connecting bracket (13) to be connected with the frame, a bracket second connecting hole (13 b) arranged on the bracket connecting bracket is connected with the transverse thrust rod (3), and a bracket third connecting hole (13 c) arranged on the bracket connecting bracket is connected with the transverse pulling plate (5).
2. A front air suspension for a low chassis according to claim 1, wherein:
the air spring and frame connecting bracket (8) is formed by welding a U-shaped sheet metal part (8 a) and a round steel plate (8 b), the U-shaped sheet metal part (8 a) is provided with a connecting hole to be connected with the frame, and the round steel plate (8 b) is matched with an upper cover of the air spring (1) and is padded on a lower wing surface of the frame.
3. A front air suspension for a low chassis according to claim 1, wherein:
the tubular torsion bar (21) is formed by welding a hollow spring steel tube (210) and an integrated end head (211), and the integrated end head (211) is provided with a welding surface (211 d), a thrust end surface (211 c), a heart-shaped end surface (211 b) and a bearing matching shaft surface (211 a); friction welding is performed on the welding surface (211 d); the hollow spring steel tube (210) is U-shaped, and the thrust end surface (211 c) and the heart-shaped end surface (211 b) respectively limit the left-right movement and the axial rotation of the large knife plate (22) relative to the tubular torsion bar (21).
4. A front air suspension for a low chassis according to claim 3, wherein:
the large knife board (22) is provided with a heart-shaped connecting hole (22 a), a quadrilateral weight-reducing hole (22 b) and a first connecting hole (22 c) of the transition bracket; the number of the quadrilateral weight reducing holes (22 b) is 3, and the upper edge and the lower edge are parallel to the outline of the large cutter plate (22); the first connecting holes (22 c) of the transition brackets are arranged in an up-down <' > shape, and the number of the first connecting holes is 4 from front to back;
the length of the large knife board (22) is 550-650 mm.
5. A front air suspension for a low chassis according to claim 1, wherein:
the transverse thrust rod (3) is provided with a transverse thrust rod joint A (3 a) and a transverse thrust rod joint B (3B); the transverse thrust rod joint A (3 a) and the transverse thrust rod joint B (3B) are respectively embedded into rubber bearings to isolate vibration and reduce noise, the middle is of an arc I-shaped beam structure (3 c), and the transverse thrust rod (3) is integrally manufactured by extrusion casting aluminum or high-strength cast iron.
6. An automobile comprising a front steering shaft assembly comprising a front shaft (15), a steering knuckle arm (16), a tie rod (17) and a brake chamber (18), characterized in that:
front air suspension comprising a low chassis according to any of claims 1 to 5.
7. An automobile according to claim 6, wherein:
the drop height of the front shaft (15) is 125-130 mm.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811616958.8A CN109664706B (en) | 2018-12-28 | 2018-12-28 | Front air suspension with low chassis and automobile |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811616958.8A CN109664706B (en) | 2018-12-28 | 2018-12-28 | Front air suspension with low chassis and automobile |
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| CN109664706A CN109664706A (en) | 2019-04-23 |
| CN109664706B true CN109664706B (en) | 2024-02-23 |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111873737B (en) * | 2020-07-31 | 2022-05-24 | 一汽解放汽车有限公司 | Air spring upper bracket and automobile chassis air suspension |
| CN113787877B (en) * | 2021-09-22 | 2023-04-18 | 一汽解放汽车有限公司 | Air suspension system for vehicle |
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| US4664407A (en) * | 1985-12-16 | 1987-05-12 | Griffin Sr Arthur D | Air ride vehicle front suspension assembly |
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| CN201659862U (en) * | 2009-07-21 | 2010-12-01 | 丹阳市车船装饰件有限公司 | Front air suspension system on large-sized passenger car |
| CN203666321U (en) * | 2014-01-22 | 2014-06-25 | 中国重汽集团济南动力有限公司 | Novel front air suspension combined support |
| CN207311021U (en) * | 2017-08-24 | 2018-05-04 | 潍柴动力股份有限公司 | Front air suspension frame system and medium-weight vehicle for medium-weight vehicle |
| CN209634210U (en) * | 2018-12-28 | 2019-11-15 | 一汽解放汽车有限公司 | A kind of front air suspension and automobile of low chassis |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4664407A (en) * | 1985-12-16 | 1987-05-12 | Griffin Sr Arthur D | Air ride vehicle front suspension assembly |
| CN2837128Y (en) * | 2005-04-27 | 2006-11-15 | 东风汽车悬架弹簧有限公司 | A front air suspension frame for coach chassis |
| CN2933932Y (en) * | 2006-08-17 | 2007-08-15 | 东风汽车有限公司 | Air suspension device of automobile steering axle |
| CN200981472Y (en) * | 2006-12-18 | 2007-11-28 | 北京柯布克科技开发有限公司 | High-grade passenger car air suspension matched with common steering axle |
| CN201659862U (en) * | 2009-07-21 | 2010-12-01 | 丹阳市车船装饰件有限公司 | Front air suspension system on large-sized passenger car |
| CN203666321U (en) * | 2014-01-22 | 2014-06-25 | 中国重汽集团济南动力有限公司 | Novel front air suspension combined support |
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| CN209634210U (en) * | 2018-12-28 | 2019-11-15 | 一汽解放汽车有限公司 | A kind of front air suspension and automobile of low chassis |
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| CN109664706A (en) | 2019-04-23 |
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