A kind of bottom arm assemblyTechnical field
The utility model belongs to swing arm technical field, particularly a kind of bottom arm assembly.
Background technology
With the continuous development of freeway net, car speed improves constantly, and rigid axle suspension can not meet peopleRequirement for riding comfort and control stability, increasing people start to select the automobile of independent suspension.Wherein double horizontal strokesArm independent suspension, flexible design, it can be made by rationally designing pin joint position and the length of leading arm of steric direction leverageDouble cross arm independent suspension has suitable kinetic characteristic, and forms appropriate roll center and trim center, can guarantee that automobileThere is good riding stability, so double cross arm independent suspension has been widely used in Advanced Sedan Car and cargo vehicle.UnderCritical piece of the swing arm as double cross arm independent suspension, plays very important effect in the use of double cross arm independent suspension.
Bottom arm assembly of the prior art includes bottom arm body 1 ', and the horizontal section of the bottom arm body 1 ' is UType, the end of the first end of the bottom arm body 1 ' are provided with bushing 11 ', and the upper surface at the second end is provided with what is be distributed on demandConnecting hole 12 '；The first mounting bracket 13 ' is additionally provided with the bottom arm body 1 ', first mounting bracket 13 ' is vertically arrangedOn the upper surface of the bottom arm body 1 ' of the connecting hole 12 ' nearby, the first mounting bracket 13 ' is used for the installation of damper,First mounting bracket 13 ' includes two pieces of supporting plates (non-label) and reinforcing plate (non-label) be arrangeding in parallel, and reinforcing plate laterally connectsConnect two pieces of supporting plates be arrangeding in parallel；The second mounting bracket 14 ', the second installation branch are additionally provided with the bottom arm body 1 'Frame 14 ' is vertically set on the side of bottom arm body 1 ' corresponding to the connecting hole 12 ', and second mounting bracket 14 ' is used forThe installation of connecting rod, including the installing plate (non-label) of the end face of vertical bottom arm body 1 ' and the both sides that are arranged on installing platePillar panel (non-label), installing plate are provided with a mounting hole.When in use, the first end of the bottom arm body 1 ' is led toThe bushing 11 ' for crossing end connects subframe, and the second end of the bottom arm body 1 ' connects knuckle, institute by ball pin assembly 2 'Ball pin assembly 2 ' and the bottom arm body 1 ' are stated by bolts assemblies, is specially：The ball pin assembly 2 ', which is provided with to coordinate, to be connectedThe screw 21 ' in hole 12 ' is connect, after screw 21 ' and the position correspondence of connecting hole 12 ', assembling fixation is carried out using bolt；MeanwhileConnecting rod (not shown) is also installed in the side at the second end of the bottom arm body 1 ' by the second mounting bracket 14 ', under describedThe opposite side at the second end of swing arm body 1 ' is also provided with distance rod and stabiliser bar (not shown) by connecting hole 12 '.
The end face at the second end of the bottom arm body of prior art is provided with the connecting hole 12 ' being distributed on demand so that lower swing armBody 1 ' forms stress concentration point, reduces the intensity of bottom arm body 1 ', causes the second end of bottom arm body 1 ' to holdIt is easy to crack, the service life of lower swing arm body 1 ' can be influenceed；Meanwhile the in order that stress of bottom arm body 1 ' in such casesHomogenization, distance rod and stabiliser bar (not shown) are arranged on to the side of bottom arm body 1 ' by connecting hole 12 ', by connecting rod(not shown) is arranged on the opposite side of bottom arm body 1 ' by the second mounting bracket 14 ', adds assembly difficulty；Furthermore examineConsidering the upper stress centrostigma of bottom arm body 1 ' causes the intensity decreases of bottom arm body 1 ', and the first mounting bracket 13 ' is arranged toTwo pieces of parallel supporting plates and one piece of reinforcing plate, the effect being applied to by a reinforcing plate carrying part on bottom arm body 1 'Power, add the complexity of equipment；Furthermore in order to ensure the intensity of the second end of bottom arm body 1 ', in the connecting hole 12 'Lower section corresponding to the end face of place needs to set bottom plate (not shown), the bottom plate connection bottom arm body 1 ' (not shown)The bottom of biside plate (non-label)；Further, maximum deficiency is that bottom arm body 1 ' and ball pin assembly 2 ' pass through mating connection hole12 ' bolts assemblies connection, fittage is complicated, and assembling effect is bad, and connection is not firm, easily loosens；To sum up, lower swing armThe end face at the second end of body 1 ' is provided with the connecting hole 12 ' being distributed on demand and is used for connecting other parts, and there is following defectAnd deficiency：Open up connecting hole 12 ' excessively trouble, the intensity for influenceing lower swing arm body 1 ', the stress of bottom arm body 1 ' easily ftracture,Reduce the service life of bottom arm body 1 ', bottom arm body 1 ' and other parts assembly works are complicated, bottom arm body 1 ' withOther parts connect not firm etc..
Utility model content
The purpose of this utility model is to provide a kind of bottom arm assembly, to solve technical problem of the prior art, its energyEnough ensure the intensity of bottom arm body, extend the service life of bottom arm body, simplify bottom arm body and ball pin assembly andThe assembly work of bottom arm assembly and other parts, improve efficiency of assembling, and connected after assembling it is firm.
The technical solution adopted in the utility model is as follows：
A kind of bottom arm assembly, including bottom arm body, ball pin assembly, the first mounting bracket for mounting shock absorber andFor installing the second mounting bracket of connecting rod, distance rod and stabiliser bar, the first mounting bracket and second mounting bracket are equalIt is arranged on the bottom arm body；The first end of the bottom arm body is provided with bushing, wherein：The of the bottom arm bodyFormed with concave surface, the concave surface is provided with ball pin mounting hole at two ends, and the ball pin mounting hole fixes the ball pin assembly.
Bottom arm assembly as described above, these, it is preferred to, the week side of boss of the bottom of the ball pin mounting hole is provided with firstFlange.
Bottom arm assembly as described above, these, it is preferred to, top edge and the concave surface of first flange are fixedConnection.
Bottom arm assembly as described above, these, it is preferred to, the central shaft of the ball pin mounting hole is with respect to the horizontal planeIt is obliquely installed.
Bottom arm assembly as described above, these, it is preferred to, second mounting bracket includes installing plate, the peaceUpper surface of the loading board parallel to the bottom arm body.
Bottom arm assembly as described above, these, it is preferred to, the installing plate is provided with multiple mounting holes.
Bottom arm assembly as described above, these, it is preferred to, the week side of boss of the installing plate is provided with the second flange, describedSecond flange is integrally formed with the installing plate.
Compared with prior art, bottom arm assembly disclosed in the utility model, directly the second end shape in bottom arm bodyInto concave surface, the concave surface is provided with ball pin mounting hole, realizes the installation of ball pin assembly, compared with prior art in by open up installationThe mode of ball pin assembly installation is realized in hole, and the utility model can avoid stress concentration point being present on bottom arm body, is effectively protectedThe intensity of bottom arm body has been demonstrate,proved, meanwhile, the bottom arm body under the strength structure can realize connecting rod, distance rod and stablyBar simplifies the assembly work of swing arm assembly and these parts in the installation of bottom arm body side, can improve assembling effectRate.Furthermore the bottom arm body assembles ball pin assembly by ball pin mounting hole, while simplifying assembly work, ball pin ensure thatThe fixing that assembly connects with bottom arm body；Ball pin mounting hole is arranged on the concave surface at the end of bottom arm body second, is effectively protectedAngle between plane where having demonstrate,proved the central shaft and bushing central shaft of the ball pin assembly after assembling, ensure that bottom arm assemblyRoll center and trim center, can protect enough card automobile have good riding stability.
Brief description of the drawings
Fig. 1 is the structural representation of prior art bottom arm assembly；
Fig. 2 is the configuration schematic diagram of prior art bottom arm assembly；
Fig. 3 is the structural representation of bottom arm assembly of the present utility model；
Fig. 4 is the configuration schematic diagram of bottom arm assembly of the present utility model；
Fig. 5 is the assembling schematic diagram of bottom arm assembly；
Description of reference numerals：1- bottom arm bodies, 10- concave surfaces, 11- bushings, 12- ball pin mounting holes, the flange of 121- first,The mounting brackets of 13- first, the mounting brackets of 14- second, 140- installing plates, 141- mounting holes, the flange of 142- second, 2- ball pins are totalInto, 3- knuckles, 4- connecting rods, 5- distance rods, 6- stabiliser bars, 7- subframes, 8- dampers.
Embodiment
Embodiment of the present utility model is described below in detail, the example of the embodiment is shown in the drawings, wherein from beginningSame or similar element is represented to same or similar label eventually or there is the element of same or like function.Below by ginsengThe embodiment for examining accompanying drawing description is exemplary, is only used for explaining the utility model, and can not be construed to of the present utility modelLimitation.
Embodiment of the present utility model provides a kind of bottom arm assembly, as shown in Figure 3 and Figure 4, including bottom arm body1st, ball pin assembly 2, the first mounting bracket 13 for mounting shock absorber and for installing connecting rod, distance rod and stabiliser barTwo mounting brackets 14, the first mounting bracket 13 and the second mounting bracket 14 are arranged on bottom arm body 1；Bottom arm body 1First end be provided with bushing 11, wherein：Installed formed with concave surface 10, concave surface 10 provided with ball pin at second end of bottom arm body 1Hole 12, ball pin mounting hole 12 fix ball pin assembly 2, and ball pin assembly 2 and ball pin mounting hole 12 are interference fitted.
The punch forming of bottom arm body 1, ball pin assembly 2 are pressed into bottom arm body 1 by press-loading device, and both match somebody with somebody in interferenceClose, assembly precision is high.
The bottom arm assembly of the present embodiment is provided with concave surface 10 at the second end of bottom arm body 1, and concave surface 10 is provided with ball pinMounting hole 12, the installation of ball pin assembly 2 is realized, can avoid stress concentration point being present on bottom arm body 1, under being effectively ensuredThe intensity of swing arm body 1, meanwhile, the bottom arm body 1 under the strength structure can effectively realize connecting rod, distance rod and stablyBar simplifies the assembly work of bottom arm assembly and these parts, can improve assembling in the installation of the side of bottom arm body 1Efficiency., can be with while simplifying assembly work furthermore the bottom arm body 1 assembles ball pin assembly 2 by ball pin mounting hole 12Ensure the fixing that ball pin assembly 2 and bottom arm body 1 connect；Ball pin mounting hole 12 is arranged on the end of bottom arm body 1 secondOn concave surface 10, the angle between plane where the central shaft and the central shaft of bushing 11 of the ball pin assembly 2 after assembling has been effectively ensuredDegree, ensure that roll center and the trim center of bottom arm assembly, and can protect enough card automobiles has good riding stability.
As the optimal technical scheme of the present embodiment, the week side of boss of the bottom of ball pin mounting hole 12 is provided with the first flange 121.TheThe elder generation of one flange 121 extends down after outwardly, is curved surface.Ball pin assembly 2 is when being assembled to ball pin mounting hole 12, from ball pin mounting hole12 bottom press-in, the first flange 121 of the bottom of ball pin mounting hole 12 can play the bottom effect of spacing ball pin assembly 2,The bottom of ball pin assembly 2 is limited in the inside of the first flange 121 simultaneously, monnolithic case is attractive in appearance.
As the optimal technical scheme of the present embodiment, in order to ensure the intensity of ball pin mounting hole 12, the first flange 121 it is upperEdge is fixedly connected with concave surface 10, and is integrally formed with concave surface 10.The top edge of first flange 121 is fixedly connected with concave surface 10,So that the first flange 121 is located at the lower section of concave surface 10, position-limiting action is only served, has no effect on the intensity of ball pin mounting hole 12.
As the optimal technical scheme of the present embodiment, the central shaft of ball pin mounting hole 12 is inclined relative to horizontal setting.Angle between plane where this is obliquely installed the central shaft and the central shaft of bushing 11 that can ensure the ball pin assembly 2 after assemblingDegree, ensure roll center and the trim center of bottom arm assembly, can protect and enough demonstrate,prove vehicle steadily traveling.
Second mounting bracket 14 is used for the integrated installation of connecting rod, distance rod and stabiliser bar, as the excellent of the present embodimentSelecting technology scheme, the second mounting bracket 14 include installing plate 140, upper surface of the installing plate 140 parallel to bottom arm body 1.PeaceLoading board 140 is big planar mount plate, can meet the needs of multiple parts integrated installation.
In order to meet the needs of multiple parts integrated installation, as the optimal technical scheme of the present embodiment, installing plate140 are provided with multiple mounting holes 141, and the position of multiple mounting holes 141 is set on demand.
In order to ensure fixing that installing plate 140 is connected with bottom arm body 1, the optimization technique side as the present embodimentCase, the week side of boss of installing plate 140 are provided with the second flange 142, and the second flange 142 is integrally formed with installing plate 140；Pass through the second flange142 one side strengthen the intensity of installing plate 140, and still further aspect is connected by the second flange 142 and the fixed of bottom arm body 1Connect, improve the fixing that installing plate 140 is connected with bottom arm body 1.
The bottom arm assembly of the offer of the present embodiment and the assembling design sketch of subframe 7, knuckle 3 and damper 8 are such asShown in Fig. 5, one end of bottom arm assembly connects subframe 7 by the bearing installed in bushing 11, and the other end is by being assembled to ballSell the ball pin assembly 2 in mounting hole 12 and connect knuckle 3, pass through the first mounting bracket 13 connection damper 8, side on upper surfaceThere are connecting rod 4, distance rod 5 and stabiliser bar 6 by the integrated installation of the second mounting bracket 14, the bottom of connecting rod 4 passes through installing plateA mounting hole 141 on 140 is arranged on installing plate 140, and the first end of distance rod 5 passes through other two on installing plate 140Individual mounting hole 141 is arranged on installing plate 140, and the second end of distance rod 5 is used for installing the second end of stabiliser bar 6, stabiliser bar 6First end is arranged on the top of connecting rod 4.
Construction, feature and action effect of the present utility model is described in detail according to the embodiment shown in schema above, withUpper described is only preferred embodiment of the present utility model, but the utility model is to limit practical range shown in drawing, it is every according toAccording to the made change of conception of the present utility model, or the equivalent embodiment of equivalent variations is revised as, still without departing from specification and figure, all should be in the scope of protection of the utility model when showing covered spirit.