CN107234934A - A kind of multi-connecting-rod separated suspension for commercial car drive axle - Google Patents

A kind of multi-connecting-rod separated suspension for commercial car drive axle Download PDF

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Publication number
CN107234934A
CN107234934A CN201710317148.1A CN201710317148A CN107234934A CN 107234934 A CN107234934 A CN 107234934A CN 201710317148 A CN201710317148 A CN 201710317148A CN 107234934 A CN107234934 A CN 107234934A
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CN
China
Prior art keywords
drag link
subframe
bearing block
pull bar
spring
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Granted
Application number
CN201710317148.1A
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Chinese (zh)
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CN107234934B (en
Inventor
田韶鹏
彭浩昆
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Liuzhou Kunling Technology Co ltd
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Wuhan University of Technology WUT
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Priority to CN201710317148.1A priority Critical patent/CN107234934B/en
Publication of CN107234934A publication Critical patent/CN107234934A/en
Application granted granted Critical
Publication of CN107234934B publication Critical patent/CN107234934B/en
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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60GVEHICLE SUSPENSION ARRANGEMENTS
    • B60G3/00Resilient suspensions for a single wheel
    • B60G3/18Resilient suspensions for a single wheel with two or more pivoted arms, e.g. parallelogram
    • B60G3/20Resilient suspensions for a single wheel with two or more pivoted arms, e.g. parallelogram all arms being rigid
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60GVEHICLE SUSPENSION ARRANGEMENTS
    • B60G11/00Resilient suspensions characterised by arrangement, location or kind of springs
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60GVEHICLE SUSPENSION ARRANGEMENTS
    • B60G13/00Resilient suspensions characterised by arrangement, location or type of vibration dampers
    • B60G13/001Arrangements for attachment of dampers
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60GVEHICLE SUSPENSION ARRANGEMENTS
    • B60G21/00Interconnection systems for two or more resiliently-suspended wheels, e.g. for stabilising a vehicle body with respect to acceleration, deceleration or centrifugal forces
    • B60G21/02Interconnection 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
    • B60G21/04Interconnection 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
    • B60G21/05Interconnection 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
    • B60G21/055Stabiliser bars
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B62LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62DMOTOR VEHICLES; TRAILERS
    • B62D21/00Understructures, i.e. chassis frame on which a vehicle body may be mounted
    • B62D21/02Understructures, i.e. chassis frame on which a vehicle body may be mounted comprising longitudinally or transversely arranged frame members
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60GVEHICLE SUSPENSION ARRANGEMENTS
    • B60G2204/00Indexing codes related to suspensions per se or to auxiliary parts
    • B60G2204/10Mounting of suspension elements
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60GVEHICLE SUSPENSION ARRANGEMENTS
    • B60G2206/00Indexing codes related to the manufacturing of suspensions: constructional features, the materials used, procedures or tools
    • B60G2206/01Constructional features of suspension elements, e.g. arms, dampers, springs
    • B60G2206/011Modular constructions

Abstract

A kind of multi-connecting-rod separated suspension for commercial car drive axle, including for the subframe assembly being connected with longitudinal beam, upper longitudinal tie assembly, upper tie rod assembly, lower tie rod assembly, stable rod assembly, damper spring assembly and with bearing seat assembly;Subframe assembly mainly includes the subframe of the double beam structures of double longerons, and subframe includes subframe front beam, rear cross beam of subframe and subframe longitudinal beam;Upper longitudinal tie assembly mainly includes upper longitudinal tie, upper tie rod assembly mainly includes upper drag link, lower tie rod assembly mainly includes lower preceding drag link and lower rear drag link, stable rod assembly mainly includes stablizing pull bar and stablizes pull bar connection boss, and damper spring assembly mainly includes shock absorber and spring.Suspension of the present invention has enough bearing capacitys, improves vehicle riding comfort, stability, substantially reduces drive axle weight, improves fuel economy, and space layout meets commercial car motorized demand, and geometric deformation does not occur for suspension under extreme loads.

Description

A kind of multi-connecting-rod separated suspension for commercial car drive axle
Technical field
The invention belongs to automotive field, and in particular to a kind of multi-connecting-rod separated suspension for commercial car drive axle.
Background technology
Beam front axle and leaf spring independent suspension structure, its structure chart such as Fig. 1 being used existing domestic commercial vehicle drive axle more Shown, its security, stability, comfortableness are poor, and weight is big, and fuel economy is poor.Nowadays commercial car traveling road conditions are become better and better, Road surface is relatively flat, and load capacity is larger, so Suspension movement scope is less, but has higher want to comfortableness and load Ask, with the demand and the trend of commercial car motorized of industry development, increasing commercial car drive axle translates into independence Suspension.
In commercial car drive axle suspension disclosed in CN203666306U, subframe passes through leaf spring pivotally connected frame longeron It is connected, damper action is on subframe, and suspension unsprung mass is big, and maneuverability, comfortableness are poor.
In the prioritization scheme described in CN204184156U, subframe is arranged in above leaf spring, reduces unsprung mass, Left and right ends wheel hub is directly connected with subframe, and lateral stability pull bar is not installed, and wheel movement interference in both sides is big, and traveling is extremely unstable It is fixed.
In drive axle independent suspension disclosed in CN203005011U, have in suspension system above and below Length discrepancy both arms with master subtract Fast device is connected, and disposes damping element in swing arm rear and front end, the horizontal and vertical space of vehicle is extremely defined, for commercialization Car motorized and motor layout cause great difficulty.
In independent suspension disclosed in CN104582982A, knuckle profile coordinates with stub contour structures, and knuckle leads to Cross ball stud to be connected with split type knuckle support, knuckle support is by being hinged and pumping arm action.
Using in the independent suspension of truck, being that double transverse arms are independently outstanding disclosed in the CN203854440U and CN201685676U Frame structure, suspension ride comfort, security and comfortableness are good, but bearing capacity is poor, and due to its shock absorber and spring element Traveller structure is collectively constituted, is easily deformed under larger stress, the bearing capacity of suspension is cannot ensure in the two documents, its With being only applicable to the anterior steeraxle of commercial car.
On the basis of multi-connecting-rod separated suspension, with reference to the advantage of double cross arm independent suspension, give up its bearing bracket Using increase longitudinal tie and QS, the ability that increase suspension resistance is rolled are installed two lower drag links, can carried Power becomes big, and vibration damping and spring element are separately mounted on two pull bars, reduces stress concentration, and reduction is suspended under stress Deformation, lifted suspension bearing capacity.
Suspension completes bearing capacity by five connecting rods and constrains Suspension movement direction, and four connecting rods build the axle of two sides one, protect The motion of card bearing block does not produce inclination, skew and rotated, and increases lateral stability pull bar, and the unilateral wheel of resistance is rolled or unilateral outstanding Frame excessive deformation, improves the control stability and security of suspension.
Auxiliary frame suspension device is on main car frame, and upper connecting rod plays guide effect, is connected with subframe longitudinal beam, and lower pull bar rises and held Load is acted on, and is connected with chassis cross-member, reduces the stress concentration of vehicle frame, and pull bar is both connected on bearing block, close to wheel hub Placement-face so that the distance between two lateral bracing struts are substantially increased, the vertical space of subframe substantially becomes big, and front beam is presented to become and cut Face structure, reduces the horizontally disposed difficulty of miscellaneous part, and suspension integrally has obvious space layout advantage, it is easy to arrange decelerator Or split motor.
The content of the invention
The technical problem to be solved in the present invention is that there is provided one for existing multi-connecting-rod separated suspension above shortcomings The multi-connecting-rod separated suspension for commercial car drive axle is planted, with reference to the advantage of double cross arm independent suspension, suspension can have enough Bearing capacity, improves comfortableness, the stability of vehicle, while substantially reducing drive axle weight, fuel economy is improved, in space On layout meet the demand of commercial car motorized, geometric deformation will not occur for suspension under extreme loads.
The present invention is for the technical scheme that is used of solution above-mentioned technical problem:
A kind of multi-connecting-rod separated suspension for commercial car drive axle, including it is total for the subframe being connected with longitudinal beam Into, upper longitudinal tie assembly, upper tie rod assembly, lower tie rod assembly, stable rod assembly, damper spring assembly and with The bearing seat assembly of wheel hub connection;
Subframe assembly mainly includes the subframe of the double beam structures of double longerons, and subframe includes subframe front beam, pair Aft cross member and subframe longitudinal beam, subframe longitudinal beam both sides stage casing are provided with subframe middle bracket, subframe rear end support, Subframe longitudinal beam side is provided with subframe front end connecting hole, and subframe longitudinal beam is provided at both ends with subframe mounting hole, for pair Frame assembly is connected with longitudinal beam;Upper longitudinal tie assembly mainly includes upper longitudinal tie, and upper tie rod assembly mainly includes Upper drag link, lower tie rod assembly mainly includes lower preceding drag link and lower rear drag link, and stable rod assembly mainly includes stable Pull bar mainly includes shock absorber and spring with pull bar connection boss, damper spring assembly is stablized, and bearing seat assembly mainly includes Bearing block, bearing block upper front end ball head bushing, bearing block upper rear end link, bearing block front lower portion link and bearing Base rear end bottom connects boss;
Upper longitudinal tie is symmetrical arranged two groups, upper longitudinal tie one end is hinged with subframe front end connecting hole, the other end with Bearing block upper front end ball head bushing is connected;Upper drag link is symmetrical arranged two groups, upper drag link one end and subframe rear end support It is hinged, the other end and bearing block upper rear end link are hinged;Drag link is symmetrical arranged two groups before lower, lower preceding drag link one end with Subframe front beam is hinged, the other end and bearing block front lower portion link are hinged;Drag link is symmetrical arranged two groups after lower, it is lower after Drag link one end is hinged with rear cross beam of subframe, the other end and bearing block rear end lower are connected boss and be hinged;The two of stable pull bar End is connected boss with the stable pull bar being arranged on two side shaft holders with bolt respectively and is connected;
Shock absorber and spring are symmetrical arranged two groups, drag link and subframe before two groups of shock absorbers are arranged under two groups Between middle bracket, two groups of springs are arranged under two groups afterwards between drag link and subframe rear end support;
Bearing block inner face perpendicular to the ground, parallel to subframe longitudinal beam, and passes through upper drag link the outer end point, lower preceding drag link The outer end point and lower rear drag link the outer end point determine that bearing block arrangement is positioned on bearing block inner face, the reserved wheel side ten thousand of bearing block To section and semiaxis installation site;Lower preceding drag link and lower rear drag link are rotated around the first rotary shaft, it is ensured that bearing block is around the first rotation Pivot, upper drag link is arranged in directly over lower rear drag link, and upper drag link is moved around the second rotary shaft, upper drag link with Drag link motion state is consistent after lower, it is ensured that bearing block will not produce inclination, skew and turn in the inner in-plane moving of bearing block Dynamic, the axially extending line of the axially extending line of lower preceding drag link and lower rear drag link constitutes lower pull bar median plane, lower pull bar center Face is vertical with bearing block inner face, the vertical end face of lower preceding drag link;It is that lower preceding drag link single head end is vertical that drag link, which indulges end face, before lower Ground and parallel to the end face of chassis cross-member, upper longitudinal tie is moved around the 3rd rotary shaft, upper longitudinal tie and lower preceding horizontal stroke Pull bar ensures that Plane Rotation does not occur and the bounce in end face is indulged in lower preceding drag link for bearing block, and stable pull bar connects two side axles Bearing, it is ensured that both sides wheel hub differences in motion is in proper range, and subframe carries out light-weight technologg, and reserved motor or decelerator peace Fill hole;First rotary shaft is that lower preceding drag link and lower rear drag link are hinged on subframe front beam, rear cross beam of subframe respectively The rotary shaft that coaxial line is rotated, the second rotary shaft is the rotary shaft that upper drag link is hinged on subframe rear end support, the 3rd rotation Rotating shaft is that upper longitudinal tie surrounds the rotary shaft that subframe longitudinal beam front end is hinged, and the first rotary shaft and the second rotary shaft are in space Upper level, the 3rd rotary shaft is spatially vertical with the first rotary shaft, the second rotary shaft;Bearing block inner face and the first rotation Axle, the second rotary shaft spatially level, bearing block inner face intersect vertically with the 3rd rotary shaft, and lower preceding drag link indulges end face and axle Bearing inner face is vertical.
By such scheme, the shock absorber longitudinal axis of the shock absorber and the spring longitudinal axis of spring are unified positioned at body side Face, and the side that shock absorber longitudinal axis and spring longitudinal axis are constituted intersects with lower preceding drag link with lower rear drag link respectively, and with First rotary shaft is spatially vertical, and spring longitudinal axis is in lower pull bar median plane;Shock absorber upper end passes through in bolt and subframe Portion's support is fixed, lower end is hinged by ball stud with lower preceding drag link, there is protective cover outside shock absorber, and protective cover bottom is provided with rubber Cushion rubber.
By such scheme, the subframe rear end support bottom surface is provided with spring upper end positioning hole, lower rear drag link upper surface Provided with lower spring end positioning hole, in the spring upper end positioning hole of spring one end insertion subframe rear end support, under other end insertion Afterwards in the lower spring end positioning hole of drag link;The spacing of subframe rear end support and lower rear drag link is stretched in the maximum of extreme position Less than the drift of spring, (now spring has certain pretightning force to long amount, it is ensured that spring is fixed on spring upper end positioning hole, spring Between the positioning hole of lower end);Spring upper and lower side is welded with spring fixed tray respectively, and spring fixed tray end face outside is provided with rubber buffer Layer.
By such scheme, the subframe longitudinal beam stage casing is provided with the positioning gradient face of sinking, and positioning gradient face is provided with Gradient face positioning hole, positioning gradient face is corresponding with cascaded surface raised on vehicle rail;Subframe rear end support bottom surface is used for solid Determine spring, be hinged sideways with upper drag link;There is motor or decelerator to install between subframe front beam, rear cross beam of subframe Space, subframe front beam stage casing is provided with the anterior thin section crossbeam of subframe, and rear cross beam of subframe stage casing is provided with subframe rear portion Thin section crossbeam, and be reserved with motor or decelerator mounting hole, subframe longitudinal beam and subframe front beam, rear cross beam of subframe It is equipped with lightweight hollow hole on subframe beam.
By such scheme, the lower preceding drag link, lower rear drag link are bearing carrier, lower preceding drag link, lower rear drag link Size is much larger than upper drag link, upper longitudinal tie size;Drag link is hinged with subframe front beam before lower connecting hole and under On an axis, lower preceding drag link connects the connecting hole that drag link is hinged with rear cross beam of subframe afterwards with bearing block front lower portion Connect the connecting hole and lower rear drag link that frame is hinged and connecting hole that boss is hinged is connected with bearing block rear end lower also in an axle On line.
By such scheme, the lower preceding head end of drag link two be articulated with subframe front beam both sides, two rubber bushing and Bolt is attached, and another single head end axial length agrees with bearing block front lower portion link width, by rubber bushing and Bolted splice is in bearing block front lower portion connecting hole;Drag link is H type rod members after lower, and lower rear drag link one end is articulated with subframe Rear cross beam both sides, are attached by two rubber bushings and bolt, and the other end is articulated with bearing block rear end lower connection boss, under Width of the distance between the drag link two with corresponding connection end agrees with afterwards;Descend the straight-bar of preceding drag link, lower rear drag link long It is long that degree is partially larger than the level of its correspondence subframe front beam, rear cross beam of subframe fixing hole to crossbeam bend section rear side midpoint Degree;Lower preceding drag link, the lower rear connectionless place in drag link stage casing are equipped with lower pull bar lightweight through hole.
By such scheme, the upper drag link is guide rod, and structure is Y-shaped, the divergent ends and subframe of upper drag link Rear end support both sides connecting hole is hinged, and single head end is hinged with bearing block upper rear end link, single head end axial length and bearing Base rear end connecting bracket width agrees with, and upper drag link divergent ends length is longer than on subframe rear end support connecting hole to subframe The length of rear end support external boundary.
By such scheme, the upper longitudinal tie uses anti-rotational bar, and upper longitudinal tie supplements drag link in guiding, Bear motion in wheel vehicle body axial direction power, upper longitudinal tie use 30CrMo materials, be divided into two parts, two parts pass through interior External splines coordinates, the design of spline outer end limited location, it is ensured that bearing block is in motion, and upper longitudinal tie length becomes in a small range Change.
By such scheme, the stable pull bar uses anti-rotational bar, and stable pull bar uses 30CrMo materials, by symmetrical Two warp architecture pull bars constitute, stable pull bar is heat-treated and hollow processing;Stable pull bar passes through bolt and stable drawing Bar connection boss internal thread connection, stable pull bar is arranged in rear cross beam of subframe rear end, stable pull bar axial bending and the steering back of the body From subframe direction (being not take up subframe inner space, provide space to install decelerator and motor and ensure).
By such scheme, the bearing block is divided into three parts, the upper longitudinal tie of front end connection and lower preceding drag link, junction Be in together in first longitudinal direction plane, first longitudinal direction plane indulges end face parallel to lower preceding drag link, perpendicular to lower pull bar median plane and Bearing block inner face;The upper drag link of rear end connection and lower rear drag link, junction are in together in second longitudinal direction plane, second longitudinal direction Plane is parallel to first longitudinal direction plane, and perpendicular to lower pull bar median plane and bearing block inner face;Drag link and lower rear horizontal stroke before lower Pull bar junction is located in same level plane, and this horizontal plane is perpendicular to bearing block inner face and the vertical end of lower preceding drag link Face, is overlapped with lower pull bar median plane;Bearing base rear end is also fixedly connected with stablizing pull bar simultaneously;Middle part be provided with a through hole and There is axle journal away from wheel hub end face (towards vehicle frame face), through hole and axle journal plane sizes guarantee by semiaxis and its bearing, wheel speed Sensor monitoring hole position is on bearing block inner face, and space size guarantees placement wheel side universal joint, overall to match somebody with somebody with wheel hub structure Close;Each pull bar is distributed in bearing block surrounding (not concentrating excessively and close to middle part).
The operation principle of the present invention:Suspension completes bearing capacity by five connecting rods and constrains Suspension movement direction, is respectively Lower preceding drag link, lower rear drag link, upper drag link, upper longitudinal tie and stable pull bar, wherein lower preceding drag link and lower rear horizontal drawing Bar is bearing carrier, lower preceding drag link, lower rear drag link and front beam, rear cross beam connecting hole on an axis, it is lower before The connecting hole that drag link, lower rear drag link and bearing block are hinged also on an axis, makes lower preceding drag link and lower rear drag link Same plane is in during motion, it is ensured that lower preceding drag link and lower rear drag link do not have movement interference and do not produce concentrated stress, The distribution of two bar bearing capacities is average, improves bearing capacity.Upper drag link is guide rod, and the drag link axis of symmetry is in " Y types " After under " H types " directly over drag link axis, both motion states are consistent, it is ensured that the motion of bearing block in bearing block inner face just Often motion.Upper longitudinal tie supplements drag link in guiding, bear motion in wheel vehicle body axial direction power, upper longitudinal tie There is shorter spline segment in stage casing so that rod length can change in less scope, it is ensured that it is linear that rack buffer changes.Increase Plus lateral stability pull bar, two end axles bearing is connected, vehicle roll stiffness is improved, the unilateral wheel of resistance is rolled or unilateral suspension is excessive Deformation.
The invention has the advantages that:
1st, it is in same plane when lower preceding drag link, lower rear drag link motion, it is ensured that lower preceding drag link, lower rear drag link exist Movement interference is not produced with subframe front beam, rear cross beam of subframe bending section in motion, and does not produce concentrated stress, it is lower preceding horizontal Pull bar, lower rear drag link bearing capacity distribution are average, improve bearing capacity;
2nd, after the drag link axis of symmetry is under " H types " in " Y types " directly over drag link axis, both motion states one Cause, it is ensured that the motion of bearing block proper motion in bearing block inner face, inclination, skew will not be produced and rotated;
3rd, there is a shorter spline segment in upper longitudinal tie stage casing, the design of spline outer end limited location, it is ensured that bearing block in motion, Upper longitudinal tie length changes in a small range, it is ensured that longitudinal tie will not be broken under larger load condition, and passes through end The spacing guarantee Suspension movement of mouth is within OK range, it is ensured that it is linear that rack buffer changes, it is ensured that vehicle riding comfort, reaches limit Behind the position of position, supporting bearing base does not produce over-deflection;
4th, increase lateral stability pull bar, connect two end axles bearing, improve vehicle roll stiffness, the unilateral wheel of resistance roll or Unilateral suspension excessive deformation, improves the control stability and security of suspension;
5th, shock absorber is identical with spring movement state, gives full play to respective effectiveness in vibration suppression, when suspension is in limit load processed When, it is to avoid each part movement interference of suspension, reduce stress concentration, lift load;Damper spring assembly is by original slide column type Change turns to separate type, reduces unsprung mass, while being not take up subframe central space;On the outside of the spring fixed tray of spring upper and lower side Face has cushion rubber layer, and shock absorber exterior protection cover is rubber ring, it is ensured that geometric deformation does not occur for output shaft and suspension system;
6th, lower preceding drag link, the lower rear connectionless place in drag link stage casing are equipped with lower pull bar lightweight through hole, and reduction suspension is whole Body weight, enhancing lower preceding drag link, lower rear drag link torsional strength;Stable pull bar is heat-treated and hollow processing, is dropped with this Low stable pull bar weight, improves stable pull bar intensity and torsional property;Overall subframe carries out light-weight technologg, mitigates suspension Gross weight, improves fuel economy.
Brief description of the drawings
Fig. 1 is conventional in the prior art SA and Leaf Spring Suspension structure chart;
Stereograms of the Fig. 2 for the present invention for the multi-connecting-rod separated suspension of commercial car drive axle;
Fig. 3 is the top view of the multi-connecting-rod separated suspension shown in Fig. 2;
Fig. 4 is the side view of the multi-connecting-rod separated suspension shown in Fig. 2;
Fig. 5 is the suspension frame structure schematic diagram of the multi-connecting-rod separated suspension side shown in Fig. 2;
Fig. 6 is the stereogram of subframe assembly in Fig. 2;
In figure, 1- subframe assemblies, the upper longitudinal tie assemblies of 2-, the upper tie rod assemblies of 3-, tie rod assembly under 4-, 5- is steady Determine rod assembly, 6- damper spring assemblies, 7- bearing seat assemblies, 8- bearing block inner faces, 9- bearing blocks, 10- wheel hubs, 11- Drag link before under shock absorber, 12- springs, 13- subframe middle brackets, 14- ball studs, 15-, 16- subframe rear end supports, Drag link after under 17- spring upper end positioning holes, 18-, 19- lower spring end positioning holes, the upper longitudinal ties of 20-, 21- subframes front end Connecting hole, 22- bearing block upper front end ball head bushings, the upper drag links of 23-, 24- bearing block upper rear end links, 25- pair cars Frame front beam, 26- bearing block front lower portion links, 27- rear cross beam of subframe, 28- bearing blocks rear end lower connection boss, The stable pull bars of 29-, the stable pull bar connection boss of 30-, the rotary shafts of 31- first, the rotary shafts of 32- second, the rotary shafts of 33- the 3rd, 34- Drag link indulges end face, 35- subframes, 36- motors or decelerator mounting hole, 37- semiaxis, 38- shock absorber longitudinal axis, 39- before lower Pull bar median plane under spring longitudinal axis, 40-, 41- spring fixed trays, 42- cushions, 43- protective covers, 44- rubber rings, 45- pairs Lightweight hollow hole on vehicle frame mounting hole, 46- positioning gradients face, 47- subframe beams, 48- wheel speed sensors monitoring holes, 49- ladders Pull bar under degree face positioning hole, 50- subframes front portion thin section crossbeam, 51- subframes rear portion thin section crossbeam, 52- axle journals, 53- Lightweight through hole, 54- warp architecture pull bars.
Embodiment
The present invention is made for the embodiment of the multi-connecting-rod separated suspension of commercial car drive axle below against accompanying drawing Description is further described, helps those skilled in the art to understand the design of the present invention and understand technical principle, helps In its implementation.
As shown in Fig. 2~Fig. 5, the multi-connecting-rod separated suspension for commercial car drive axle described in the embodiment of the present invention, bag Include for the subframe assembly 1 being connected with longitudinal beam, upper longitudinal tie assembly 2, upper tie rod assembly 3, lower tie rod assembly 4th, stable rod assembly 5, damper spring assembly 6 and the bearing seat assembly 7 being connected with wheel hub 10.
Subframe assembly 1 mainly includes the subframe 35 of the double beam structures of double longerons, similar to " mouth " font, subframe 35 Including subframe front beam 25, rear cross beam of subframe 27 and subframe longitudinal beam, subframe longitudinal beam both sides stage casing is provided with subframe Middle bracket 13, subframe rear end support 16, subframe longitudinal beam side are provided with subframe front end connecting hole 21, subframe longitudinal beam It is provided at both ends with subframe mounting hole 45, is connected for subframe assembly 1 with longitudinal beam (while using rubber when being connected with Glue bushing, makes subframe 35 be suspended on vehicle frame, the impact between buffering subframe 35 and vehicle frame);Upper longitudinal tie assembly 2 is led Will include upper longitudinal tie 20, upper tie rod assembly 3 mainly include upper drag link 23, lower tie rod assembly 4 mainly include it is lower before Drag link 15 and lower rear drag link 18, stable rod assembly 5 mainly include stablizing pull bar 29 and stablize pull bar connection boss 30, subtract Device main assemblage of spring 6 of shaking mainly includes shock absorber 11 and spring 12, and bearing seat assembly 7 is mainly including on bearing block 9, bearing block front end Portion's ball head bushing 22, bearing block upper rear end link 24, bearing block front lower portion link 26 and bearing block rear end lower connect Connect boss 28.
Upper longitudinal tie 20 is symmetrical arranged two groups, and upper one end of longitudinal tie 20 is hinged (simultaneously with subframe front end connecting hole 21 Be attached by two rubber bushings and bolt), the other end and bearing block upper front end ball head bushing 22 connected (towards vehicle frame face Connection, then be fixed by wheel hub surface);Upper drag link 23 is symmetrical arranged two groups, upper one end of drag link 23 and subframe rear end branch Frame 16 is hinged, the other end and bearing block upper rear end link 24 are hinged;Drag link 15 is symmetrical arranged two groups, lower preceding horizontal drawing before lower The one end of bar 15 is hinged with subframe front beam 25, the other end and bearing block front lower portion link 26 are hinged;Drag link 18 after lower Two groups are symmetrical arranged, lower rear one end of drag link 18 is hinged with rear cross beam of subframe 27, the other end and bearing block rear end lower are connected Boss 28 is hinged;The two ends of stable pull bar 29 are connected boss with bolt with the stable pull bar being arranged on two side shaft holders 9 respectively 30 are connected;
Shock absorber 11 and spring 12 are symmetrical arranged two groups, and two groups of shock absorbers 11 are arranged under two groups preceding drag link 15 Between subframe middle bracket 13, drag link 18 and subframe rear end support 16 after two groups of springs 12 are arranged under two groups Between;Bearing block inner face 8 perpendicular to the ground, parallel to subframe longitudinal beam, and passes through the upper the outer end point of drag link 23, lower preceding drag link 15 the outer end points and the lower the outer end point of rear drag link 18 determine that the arrangement of bearing block 9 is positioned on bearing block inner face 8, and bearing block 9 is reserved Take turns side universal joint and the installation site of semiaxis 37, lower preceding drag link 15, lower rear drag link 18, upper drag link 23, upper longitudinal tie 20 It is hinged with pull bar 29 is stablized with bearing block;Lower preceding drag link 15 and lower rear drag link 18 are rotated around the first rotary shaft 31, it is ensured that Bearing block 9 is moved around the first rotary shaft 31, and upper drag link 23 is arranged in directly over lower rear drag link 18, it is ensured that two pull bars move shape State is as identical as possible, reduces the abrasion of suspension system at work, and upper drag link 23 is moved around the second rotary shaft 32, upper horizontal drawing Bar 23 is consistent with the lower rear motion state of drag link 18, it is ensured that bearing block 9 is moved in the bearing block inner face 8, will not produce inclination, Skew and rotation, the axially extending line of lower preceding drag link 23 and the axially extending line of lower rear drag link 18 constitute lower pull bar median plane 40, lower pull bar median plane 40 is vertical with bearing block inner face 8, the vertical end face 34 of lower preceding drag link;The vertical end face 34 of drag link is before lower The single head end of drag link 15 is perpendicular to the ground and parallel to the end face of chassis cross-member before lower, and upper longitudinal tie 20 surrounds the 3rd rotary shaft 33 motions, upper longitudinal tie 20 and lower preceding drag link 15 ensure that Plane Rotation does not occur for bearing block 9 and vertical in lower preceding drag link Bounce in end face 34, stable pull bar 29 connects two side shaft holders 9, it is ensured that the differences in motion of both sides wheel hub 10 is secondary in proper range Vehicle frame 35 carries out light-weight technologg, and reserved motor or decelerator mounting hole 36;First rotary shaft 31 is respectively lower preceding drag link 15 and lower rear drag link 18 be hinged on subframe front beam 25, rear cross beam of subframe 27 coaxial line rotation rotary shaft, second Rotary shaft 32 is the rotary shaft that upper drag link 23 is hinged on subframe rear end support 16, and the 3rd rotary shaft 33 is upper longitudinal tie 20 rotary shafts being hinged around subframe longitudinal beam front end, and the first rotary shaft 31 and the second rotary shaft 32 spatially level, the Three rotary shafts 33 are spatially vertical with the first rotary shaft 31, the second rotary shaft 32;The rotary shaft of bearing block inner face 8 and first 31st, the second rotary shaft 32 spatially level, bearing block inner face 8 intersects vertically with the 3rd rotary shaft 33, the vertical end of lower preceding drag link Face 34 is vertical with bearing block inner face 8.
The shock absorber longitudinal axis 38 of shock absorber 11 and the spring longitudinal axis 39 of spring 12 are unified positioned at vehicle body side, shock absorber The side that longitudinal axis 38 and spring longitudinal axis 39 are constituted is intersected with lower preceding drag link 15 with lower rear drag link 18 respectively, with the first rotation Rotating shaft 31 is spatially vertical, and spring longitudinal axis 39 is in lower pull bar median plane 40, and shock absorber 11 is identical with the motion state of spring 12, Give full play to respective effectiveness in vibration suppression, it is to avoid movement interference, reduce stress concentration, lift load.
The one end of shock absorber 11 completes to position by bolt and the positioning hole of subframe middle bracket 13, passes through top Bolt is connected with subframe middle bracket 13, and the other end is first corresponded in the lower preceding positioning hole of drag link 15, by ball head bushing with Preceding drag link 15 is hinged, then is fixed from lower preceding drag link 15 insertion bolt near the ground, is easy to the installation, maintenance and more of shock absorber 11 Change, and avoid due to the parts damages of one of damping element, the dangerous situation of suspension forfeiture effect occurs;The phase of shock absorber 11 There is one layer of protective cover 43 for shock-absorbing spring 12 closer to vehicle forward direction, outside it, protection shock absorber operationally will not Influenceed by severe operating mode, the bottom of protective cover 43 is provided with rubber ring 44, it is to avoid is suspended in when the limit meets and moves past the limit Position, causes movement interference to produce deformation.
The bottom surface of subframe rear end support 16 is provided with spring upper end positioning hole 17, and the lower rear upper surface of drag link 18 is provided with spring After in end positioning hole 19, the spring upper end positioning hole 17 of the one end of spring 12 insertion subframe rear end support 16, under other end insertion In the lower spring end positioning hole 19 of drag link 18;The spacing of subframe rear end support 16 and lower rear drag link 18 is in extreme position Maximal tensility is less than the drift of spring 12, and now spring 12 has certain pretightning force, it is ensured that spring 12 is fixed on spring Hold between positioning hole 17, lower spring end positioning hole 19;Spring upper and lower side is welded with outside spring fixed tray 41, spring fixed tray 41 respectively Side end face is provided with cushion rubber layer 42.
Subframe longitudinal beam stage casing is provided with the positioning gradient face 46 (positioning countersunk seat) of sinking, and positioning gradient face 46 is provided with Gradient face positioning hole 49, positioning gradient face 46 is corresponding with cascaded surface raised on vehicle rail, is easy to subframe 35 and suspension system The location and installation of system, gradient face positioning hole 49 ensures accurate positioning;The bottom surface of subframe rear end support 16 is used to fix spring 12, side Face is hinged with upper drag link 23;There is motor or decelerator to install empty between subframe front beam 25, rear cross beam of subframe 27 Between, the stage casing of subframe front beam 25 is provided with the anterior thin section crossbeam 50 (area of section diminishes, variable cross-section is handled) of subframe, secondary car The stage casing of frame rear cross beam 27 is provided with subframe rear portion thin section crossbeam 51 (area of section diminishes, variable cross-section is handled), and is reserved with electricity Subframe beam is equipped with machine or decelerator mounting hole 36, subframe longitudinal beam and subframe front beam 25, rear cross beam of subframe 27 Upper lightweight hollow hole 47, overall subframe carries out light-weight technologg, mitigates the gross weight of suspension, improves fuel economy.
Lower preceding drag link 15, lower rear drag link 18 are bearing carrier, primarily serve carrying and act on, lower preceding drag link 15, under The size of drag link 18 is much larger than upper drag link 23, the size of upper longitudinal tie 20 afterwards;Drag link 15 and subframe front beam 25 before lower The connecting hole that the connecting hole and lower rear drag link 18 being hinged are hinged with rear cross beam of subframe 27 is on an axis, lower preceding horizontal The connecting hole and lower rear drag link 18 that pull bar 15 is hinged with bearing block front lower portion link 26 connect with bearing block rear end lower Connecting hole that boss 28 is hinged is connect also on an axis, in same when moving lower preceding drag link 15, lower rear drag link 18 Plane, it is ensured that lower preceding drag link 15, lower rear drag link 18 do not have movement interference and do not produce concentrated stress, lower preceding drag link 15th, the lower bearing capacity of rear drag link 18 distribution is average, improves bearing capacity.
Drag link 15 is in non-standard Y types before lower, two head ends be articulated with the both sides of subframe front beam 25, two rubber bushing and Bolt is attached, and another single head end axial length agrees with the width of bearing block front lower portion link 26, passes through rubber bushing With bolted splice in bearing block front lower portion connecting hole;Drag link 18 is H type rod members after lower, and its one end is articulated with after subframe horizontal The both sides of beam 27, are attached by two rubber bushings and bolt, and the other end is articulated with bearing block rear end lower connection boss 28, its Width of the distance between the two with corresponding connection end agrees with.Lower preceding drag link 15, the straight-bar length portion of lower rear drag link 18 Divide level more than its correspondence subframe front beam 25, the fixing hole of rear cross beam of subframe 27 to crossbeam bend section rear side midpoint long Degree, prevent lower preceding drag link 15, lower rear drag link 18 during exercise with subframe front beam 25, the bending section of rear cross beam of subframe 27 Movement interference is produced, lower preceding drag link 15, the connectionless place in the lower rear stage casing of drag link 18 are equipped with lower pull bar lightweight through hole 53, dropped Low suspension overall weight, enhancing lower preceding drag link 15, the lower rear torsional strength of drag link 18.
Upper drag link 23 is guide rod, and structure is Y-shaped, 16 liang of divergent ends and the subframe rear end support of upper drag link 23 Side connecting hole is hinged, and single head end is hinged with bearing block upper rear end link 24, and single head end axial length connects with bearing base rear end Support width is connect to agree with, and the divergent ends length of upper drag link 23 is longer than on subframe rear end support 16 connecting hole to subframe rear end The length of the external boundary of support 16, it is to avoid movement interference.Drag link 18 after the axis of symmetry of drag link 23 is under " H types " in " Y types " Directly over axis, both motion states are consistent, it is ensured that the motion of bearing block 9 proper motion in bearing block inner face, will not produce It is raw to roll, offset and rotate.
Upper longitudinal tie 20 supplements drag link with anti-rotational bar (torsion type rod member), upper longitudinal tie 20 in guiding 23, the power of wheel in motion in vehicle body axial direction is born, upper longitudinal tie 20 uses 30CrMo materials, is divided into two parts, two parts Pass through inside and outside spline fitted (the shorter spline segment in the upper stage casing of longitudinal tie 20), spline outer end limited location design, it is ensured that bearing block 9 In motion, upper longitudinal tie 20 can change in length in a small range, it is ensured that longitudinally be drawn under larger load condition Bar 20 will not be broken, and ensure Suspension movement within OK range by the way that port is spacing, it is ensured that it is linear that rack buffer changes, Ensure vehicle riding comfort, reach after restraining position, supporting bearing base 9 does not produce over-deflection.
Stable pull bar 29 is with anti-rotational bar (torsion type rod member), and stable pull bar 29 equally uses 30CrMo materials, by a left side Right symmetrical two warp architecture pull bars 54 are constituted, and stable pull bar 29 is heat-treated and hollow processing, and stable drawing is reduced with this The weight of bar 29, improves the stable intensity of pull bar 29 and torsional property.
Stable pull bar 29 is by bolt and stablizes pull bar connection boss 30 internal thread connection, and stable pull bar 29 is arranged in secondary car The rear end of frame rear cross beam 27, the stabilization axial bending of pull bar 29 and steering are not take up the inside of subframe 35 empty away from the direction of subframe 35 Between, space is provided and ensured to install decelerator and motor.
To ensure the motion correctness of bearing block 9 and reducing service wear, the structure of bearing block 9 is met:The structure on bearing block Position relationship between part junction is consistent with the constraint of rod member component movement, makes bearing block 9 operationally will not be by multi-direction power Act on and damage.9 points of bearing block is three parts, the upper longitudinal tie 20 of front end connection and lower preceding drag link 15, and junction is in together In first longitudinal direction plane, first longitudinal direction plane indulges end face 34 parallel to lower preceding drag link, perpendicular to lower pull bar median plane 40 and axle Bearing inner face 8;The upper drag link 23 of rear end connection and lower rear drag link 18, junction are in together in second longitudinal direction plane, and second Fore-and-aft plane is parallel to first longitudinal direction plane, and perpendicular to lower pull bar median plane 40 and bearing block inner face 8, lower preceding drag link 15 With the lower rear junction of drag link 18 be located at same level plane in, this horizontal plane perpendicular to bearing block inner face 8 and it is lower before Drag link indulges end face 34, is overlapped with lower pull bar median plane 40, it is ensured that not producing larger stress inside when bearing block 9 works should Become, and prevent that bearing block 9 from operationally being damaged by the effect of multi-direction power, the rear end of bearing block 9 is also consolidated with stablizing pull bar 29 simultaneously Fixed connection;Middle part is provided with a through hole and is having axle journal 52 away from the end face of wheel hub 10 (towards vehicle frame face), and through hole and axle journal 52 are flat Face size guarantees by semiaxis 37 and its bearing, and wheel speed sensors monitoring holes 48 are located on bearing block inner face 8, space size Guarantee placement wheel side universal joint, the overall and respective outer side edges of wheel hub 10;Each pull bar is distributed in the surrounding of bearing block 9, should not excessively collect In and close to middle part.
Multi-connecting-rod separated suspension of the present invention proposes a kind of improvement project when needing to carry compared with heavy-duty, by carry out compared with Small structural adjustment, increases the bearing capacity of suspension, suspension is met use requirement, excellent on longitudinal space due to being suspended in Gesture, can be transformed to traveller assembly, former shock absorber 11 is transformed to air on the basis of horizontal space is prevented take up at former spring Spring cushion, strengthens the damping property and bearing capacity of suspension, meets heavily loaded use condition.
Each part of vehicle drive system operationally, is arranged in the center of subframe 35 by multi-connecting-rod separated suspension of the present invention In space, decelerator can be after another gradient end face in shared subframe positioning gradient face 46 be positioned, after subframe Motor or decelerator mounting hole 36 on crossbeam 27 are fixed, and horizontal space meets at least one decelerator, by semiaxis 37 Transmission is supported by bearing block 9, is reconnected in wheel hub 10, is reached power drive purpose;When commercial car is that motor independently drives, axle The middle part vertical direction space of bearing 9 is larger, can arrange hub reduction gear, and both sides motor can be side by side respectively by the secondary car in both sides Frame positioning gradient face 46 is positioned, then the motor or decelerator mounting hole 36 reserved on rear cross beam of subframe 27 are consolidated respectively Fixed, motor output shaft replaces semiaxis 37, is connected by universal joint with hub reduction gear, hub reduction gear output shaft passes through bearing block It is connected after 9 supporting with wheel hub 10, reaches power drive purpose.
Above content combination accompanying drawing has carried out exemplary illustration to the present invention, also has a variety of changes in terms of structure and layout And modification, therefore equivalent technical scheme falls within scope of the invention, design and the unsubstantiality of scheme using the present invention Improve, within protection scope of the present invention.

Claims (10)

1. a kind of multi-connecting-rod separated suspension for commercial car drive axle, it is characterised in that:Including for being connected with longitudinal beam Subframe assembly, upper longitudinal tie assembly, upper tie rod assembly, lower tie rod assembly, stable rod assembly, damper spring Assembly and the bearing seat assembly being connected with wheel hub;
Subframe assembly mainly includes the subframe of the double beam structures of double longerons, and subframe includes subframe front beam, subframe Rear cross beam and subframe longitudinal beam, subframe longitudinal beam both sides stage casing are provided with subframe middle bracket, subframe rear end support, secondary car Frame longeron side is provided with subframe front end connecting hole, and subframe longitudinal beam is provided at both ends with subframe mounting hole, for subframe Assembly is connected with longitudinal beam;Upper longitudinal tie assembly mainly includes upper longitudinal tie, and upper tie rod assembly mainly includes upper horizontal stroke Pull bar, lower tie rod assembly mainly includes lower preceding drag link and lower rear drag link, and stable rod assembly mainly includes stablizing pull bar Boss is connected with pull bar is stablized, damper spring assembly mainly includes shock absorber and spring, and bearing seat assembly mainly includes bearing After seat, bearing block upper front end ball head bushing, bearing block upper rear end link, bearing block front lower portion link and bearing block Hold bottom connection boss;
Upper longitudinal tie is symmetrical arranged two groups, and upper longitudinal tie one end is hinged with subframe front end connecting hole, the other end and bearing The ball head bushing connection of seat upper front end;Upper drag link is symmetrical arranged two groups, upper drag link one end is hinged with subframe rear end support, The other end is hinged with bearing block upper rear end link;Drag link is symmetrical arranged two groups before lower, lower preceding drag link one end and secondary car Frame front beam is hinged, the other end and bearing block front lower portion link are hinged;Drag link is symmetrical arranged two groups, lower rear horizontal drawing after lower Bar one end is hinged with rear cross beam of subframe, the other end and bearing block rear end lower are connected boss and be hinged;The two ends point of stable pull bar Boss is not connected with the stable pull bar being arranged on two side shaft holders with bolt to be connected;
Shock absorber and spring are symmetrical arranged two groups, drag link and subframe middle part before two groups of shock absorbers are arranged under two groups Between support, two groups of springs are arranged under two groups afterwards between drag link and subframe rear end support;
Bearing block inner face perpendicular to the ground, parallel to subframe longitudinal beam, and passes through upper drag link the outer end point, lower preceding drag link outer end Point and lower rear drag link the outer end point determine that bearing block arrangement is positioned on bearing block inner face, the reserved wheel side universal joint of bearing block With semiaxis installation site;Lower preceding drag link and lower rear drag link are rotated around the first rotary shaft, it is ensured that bearing block is around the first rotary shaft Motion, upper drag link is arranged in directly over lower rear drag link, upper drag link around the motion of the second rotary shaft, upper drag link and it is lower after Drag link motion state is consistent, it is ensured that bearing block will not produce inclination, skew and rotate in the inner in-plane moving of bearing block, under The axially extending line of the axially extending line of preceding drag link and lower rear drag link constitutes lower pull bar median plane, lower pull bar median plane and axle It is vertical that bearing inner face, lower preceding drag link indulge end face;Before lower drag link indulge end face be lower preceding drag link single head end perpendicular to the ground and Parallel to the end face of chassis cross-member, upper longitudinal tie is moved around the 3rd rotary shaft, and upper longitudinal tie and lower preceding drag link are protected Plane Rotation does not occur and the bounce in end face is indulged in lower preceding drag link for card bearing block, and stable pull bar connects two side shaft holders, Ensure both sides wheel hub differences in motion in proper range, subframe carries out light-weight technologg, and reserved motor or decelerator mounting hole; First rotary shaft is that lower preceding drag link and lower rear drag link are hinged coaxial line on subframe front beam, rear cross beam of subframe respectively The rotary shaft of rotation, the second rotary shaft is the rotary shaft that upper drag link is hinged on subframe rear end support, and the 3rd rotary shaft is Upper longitudinal tie surrounds the rotary shaft that is hinged of subframe longitudinal beam front end, and the first rotary shaft and the second rotary shaft spatially water Flat, the 3rd rotary shaft is spatially vertical with the first rotary shaft, the second rotary shaft;Bearing block inner face and the first rotary shaft, Two rotary shafts spatially level, bearing block inner face intersects vertically with the 3rd rotary shaft, and lower preceding drag link indulges end face and bearing block Inner face is vertical.
2. the multi-connecting-rod separated suspension according to claim 1 for commercial car drive axle, it is characterised in that:The vibration damping The shock absorber longitudinal axis of device and the spring longitudinal axis of spring are unified positioned at vehicle body side, shock absorber longitudinal axis and spring longitudinal axis structure Into side intersect respectively with lower preceding drag link with lower rear drag link, and, spring longitudinal axis spatially vertical with the first rotary shaft In lower pull bar median plane;Shock absorber upper end is fixed by bolt and subframe middle bracket, lower end by ball stud with it is lower before Drag link is hinged, and has protective cover outside shock absorber, and protective cover bottom is provided with rubber ring.
3. the multi-connecting-rod separated suspension according to claim 1 for commercial car drive axle, it is characterised in that:The secondary car Frame rear end support bottom surface is provided with spring upper end positioning hole, and lower rear drag link upper surface is provided with lower spring end positioning hole, spring one end In the spring upper end positioning hole of embedded subframe rear end support, in the lower spring end positioning hole of the lower rear drag link of other end insertion; The spacing of subframe rear end support and lower rear drag link is less than the drift of spring in the maximal tensility of extreme position;Spring Upper and lower side is welded with spring fixed tray respectively, and spring fixed tray end face outside is provided with cushion rubber layer.
4. the multi-connecting-rod separated suspension according to claim 1 for commercial car drive axle, it is characterised in that:The secondary car Frame longeron stage casing is provided with the positioning gradient face of sinking, and positioning gradient face is provided with gradient face positioning hole, positioning gradient face and car Raised cascaded surface correspondence on longeron;Subframe rear end support bottom surface is used to fix spring, is hinged sideways with upper drag link;It is secondary There is motor or decelerator installing space, subframe front beam stage casing is provided with pair between frame front cross beam, rear cross beam of subframe Vehicle frame front portion thin section crossbeam, rear cross beam of subframe stage casing is provided with subframe rear portion thin section crossbeam, and is reserved with motor or subtracts Lightweight hollow out on subframe beam is equipped with fast device mounting hole, subframe longitudinal beam and subframe front beam, rear cross beam of subframe Hole.
5. the multi-connecting-rod separated suspension according to claim 1 for commercial car drive axle, it is characterised in that:It is described it is lower before Drag link, lower rear drag link are bearing carrier, and lower preceding drag link, lower rear drag link size are drawn much larger than upper drag link, upper longitudinal direction Bar size;What the connecting hole and lower rear drag link that lower preceding drag link is hinged with subframe front beam were hinged with rear cross beam of subframe Connecting hole on an axis, connecting hole that lower preceding drag link and bearing block front lower portion link are hinged and lower rear horizontal is drawn Bar is connected connecting hole that boss is hinged with bearing block rear end lower also on an axis.
6. the multi-connecting-rod separated suspension according to claim 1 for commercial car drive axle, it is characterised in that:It is described it is lower before The head end of drag link two is articulated with rubber bushing and bolt at subframe front beam both sides, two and is attached, another single head end axial direction Length is agreed with bearing block front lower portion link width, is connected by rubber bushing and bolted splice in bearing block front lower portion Hole;Drag link is H type rod members after lower, and lower rear drag link one end is articulated with rear cross beam of subframe both sides, by two rubber bushings and Bolt is attached, and the other end is articulated with bearing block rear end lower connection boss, the distance between lower rear drag link two with The width of corresponding connection end agrees with;Lower preceding drag link, the straight-bar length thereof of lower rear drag link are more than horizontal before its correspondence subframe Beam, rear cross beam of subframe fixing hole to crossbeam bend section rear side midpoint horizontal length;In lower preceding drag link, lower rear drag link The connectionless place of section is equipped with lower pull bar lightweight through hole.
7. the multi-connecting-rod separated suspension according to claim 1 for commercial car drive axle, it is characterised in that:The upper horizontal stroke Pull bar is guide rod, and structure is Y-shaped, and divergent ends and the subframe rear end support both sides connecting hole of upper drag link are hinged, single head End is hinged with bearing block upper rear end link, and single head end axial length agrees with bearing base rear end connecting bracket width, and on Drag link divergent ends length is longer than connecting hole on subframe rear end support to the length of subframe rear end support external boundary.
8. the multi-connecting-rod separated suspension according to claim 1 for commercial car drive axle, it is characterised in that:It is described vertical Anti-rotational bar is used to pull bar, upper longitudinal tie supplement drag link in guiding, bear wheel in motion axial in vehicle body Power, upper longitudinal tie uses 30CrMo materials, is divided into two parts, two parts pass through inside and outside spline fitted, spline outer end limited location Design, it is ensured that bearing block is in motion, and upper longitudinal tie length changes in a small range.
9. the multi-connecting-rod separated suspension according to claim 1 for commercial car drive axle, it is characterised in that:The stabilization Pull bar uses anti-rotational bar, and stable pull bar uses 30CrMo materials, is made up of symmetrical two warp architecture pull bars, stable Pull bar is heat-treated and hollow processing;Stable pull bar is by bolt and stablizes pull bar connection boss internal thread connection, stable to draw Bar is arranged in rear cross beam of subframe rear end, stablizes pull bar axial bending and turns to and deviates from subframe direction.
10. the multi-connecting-rod separated suspension according to claim 1 for commercial car drive axle, it is characterised in that:The axle Bearing is divided into three parts, the upper longitudinal tie of front end connection and lower preceding drag link, and junction is in together in first longitudinal direction plane, and first Fore-and-aft plane indulges end face parallel to lower preceding drag link, perpendicular to lower pull bar median plane and bearing block inner face;The upper horizontal stroke of rear end connection Pull bar and lower rear drag link, junction are in together in second longitudinal direction plane, second longitudinal direction plane parallel to first longitudinal direction plane, and Perpendicular to lower pull bar median plane and bearing block inner face;Lower preceding drag link and lower rear drag link junction are located at same level plane Interior, this horizontal plane indulges end face perpendicular to bearing block inner face and lower preceding drag link, is overlapped with lower pull bar median plane;Bearing block Rear end is also fixedly connected with stablizing pull bar simultaneously;Middle part is provided with a through hole and is having axle journal, through hole and axle away from wheel hub end face Neck plane sizes guarantee by semiaxis and its bearing, and wheel speed sensors monitoring holes are located on bearing block inner face, space size Guarantee placement wheel side universal joint, it is overall to coordinate with wheel hub structure;Each pull bar is distributed in bearing block surrounding.
CN201710317148.1A 2017-05-08 2017-05-08 A kind of multi-connecting-rod separated suspension for commercial vehicle drive axle Active CN107234934B (en)

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CN113561722A (en) * 2021-08-12 2021-10-29 安徽江淮汽车集团股份有限公司 Integral bridge type suspension
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