A kind of car steering tube column crumple endergonic structure
Technical field
The present invention relates to the car load security fields, be specifically related to car steering tube column crumple endergonic structure.
Background technology
When safety misadventure occurs, chaufeur head and chest can produce bearing circle and impact, this impact can pass to steering column by bearing circle, the latter can produce reverse impact power to chaufeur head and chest conversely, human body is damaged, and the state compulsion rules are stipulated the maxim of this impulsive force.For reaching this target, car steering tube column adopts the crumple endergonic structure at present, and when impulsive force reached steering column crumple power peak value, the peculiar structure design of steering column can be along the axis crumple, and impulsive force no longer continues to increase, the protection chaufeur.Orthodox car steering column crumple endergonic structure generally adopts the combination of injection moulding pin and over-surplus fit structure to realize the crumple energy-absorbing.As shown in Figure 1, upper mounting bracket 91 adopts 4 injection moulding pins 93 to be injection-moulded in installing between the aluminium block 92; As shown in Figure 2, between upper column jecket 94 and the lower column jecket 95 by interference fit link together, moving axis 96 is uploaded in column jecket inside, link together by injection moulding pin 98 between the lower drive shaft 97.When car load crashes, chaufeur crash direction dish, the impulsive force that is delivered on the steering column can cut off injection moulding pin 93, and column jecket 94 is connected with interference fit between the lower column jecket 95 on the destruction, this process can absorb chaufeur collision direction dish impulsive force, reduces the human injury.But the steering column crumple power value of this structure is (5500N~6500N) in a larger scope; especially go up mounting bracket 91 and aluminium block 92 is installed, is uploaded and be connected the employing Shooting Technique between moving axis 96 and the lower drive shaft 97; the controllability of existing Shooting Technique is relatively poor; thereby make the crumple power can be higher; impact can cause the steering column can't crumple less than crumple power when collision case occurs; can't play a protective role to chaufeur, safety factor is lower.
Summary of the invention
For the crumple energy-absorbing power that solves the conventional steering tubing string is larger, be difficult to protect the passenger during collision, technology controlling and process is difficult simultaneously; the shortcoming that cost is high; the invention provides a kind of steering column crumple endergonic structure, this is simple and compact for structure, and steering column crumple power can be controlled in the zone of reasonableness.
The present invention adopts following technical scheme:
A kind of car steering tube column crumple endergonic structure, it comprises:
Outer mounting bracket, it has the pilot hole that axially arranges along steering column;
Interior mounting bracket;
Friction shoe;
Described outer mounting bracket is captiveed joint with vehicle body, and described friction shoe is captiveed joint with described interior mounting bracket through described pilot hole, and described friction shoe compresses described outer mounting bracket, described outer mounting bracket be connected interior mounting bracket and connect by the injection moulding pin; During crumple, described friction shoe and described interior mounting bracket move along described pilot hole.
Selectable, the one side that described outer mounting bracket is compressed by described friction shoe has the terrace of appearing on the stage and leave from office terrace, and the described terrace of appearing on the stage contacts with described friction shoe, and described leave from office terrace and described friction shoe have the gap.
Selectable, described friction shoe is connected with the bolt that is fixedly connected as between the described interior mounting bracket, and described bolt passes described friction shoe and described pilot hole and described interior mounting bracket and fixes.
Selectable, described steering column comprises column jecket and lower column jecket, passes through plastics adapter sleeve captive joint between described upper column jecket and the described lower column jecket.
A kind of car steering tube column crumple endergonic structure, it comprises:
Outer mounting bracket, it has the pilot hole that axially arranges along tubing string;
Interior mounting bracket;
Contiguous block;
Friction shoe;
Described outer mounting bracket is captiveed joint with vehicle body, described friction shoe is captiveed joint with described interior mounting bracket through described pilot hole, described friction shoe compresses described outer mounting bracket, described outer mounting bracket and the riveted joint of described contiguous block, described interior mounting bracket is connected by the injection moulding pin with described contiguous block, during crumple, described friction shoe and described interior mounting bracket move along described pilot hole.
Selectable, described contiguous block has two engaging lugs, and described interior mounting bracket is between described two engaging lugs.
Selectable, described interior mounting bracket has the location gap that cooperates with described contiguous block.
Selectable, the one side that described outer mounting bracket is compressed by described friction shoe has the terrace of appearing on the stage and leave from office terrace, and the described terrace of appearing on the stage contacts with described friction shoe, and described leave from office terrace and described friction shoe have the gap.
Selectable, described friction shoe is connected with the bolt that is fixedly connected as between the described interior mounting bracket, and described bolt passes described friction shoe and described pilot hole and described interior mounting bracket and fixes.
Selectable, described steering column comprises column jecket and lower column jecket, passes through plastics adapter sleeve captive joint between described upper column jecket and the described lower column jecket.
Beneficial effect of the present invention:
The present invention adopts outer mounting bracket circumferentially fixing to the upper column jecket of steering column, outer mounting bracket and vehicle body are fixed, and connect by the injection moulding pin between interior mounting bracket and the outer mounting bracket, simultaneously, increase the friction shoe fixing with interior mounting bracket, had thrust between friction shoe and the outer mounting bracket.When car load meets accident collision; outer mounting bracket can't move; human body is applied to bearing circle and is delivered to impulsive force on the steering column; after having destroyed the injection moulding pin of interior mounting bracket and outer mounting bracket; overcome the friction force between friction shoe and the outer mounting bracket; friction shoe is moved along the steering column axis direction with interior mounting bracket, thereby make tubing string generation crumple, the protection driver safety.Steering column collapsing structure of the present invention when significantly reducing tubing string crumple energy-absorbing power, reduces relying on for technology controlling and process; When strengthening car load safety guard-safeguard performance, reduced the tubing string cost.
The present invention adopts outer mounting bracket circumferentially fixing to the upper column jecket of steering column, outer mounting bracket and vehicle body are fixed, outer mounting bracket is captiveed joint with contiguous block, connect by the injection moulding pin between interior mounting bracket and the contiguous block, simultaneously, increase the friction shoe fixing with interior mounting bracket, had thrust between friction shoe and the outer mounting bracket.When car load meets accident collision; outer mounting bracket and contiguous block can't move; human body is applied to bearing circle and is delivered to impulsive force on the tubing string; after having destroyed the injection moulding pin of interior mounting bracket and outer mounting bracket; overcome the friction force between friction shoe and the contiguous block, interior mounting bracket and contiguous block are thrown off, thereby friction shoe is moved along the steering column axis direction with interior mounting bracket; thereby make tubing string generation crumple, the protection driver safety.Steering column collapsing structure of the present invention when significantly reducing tubing string crumple energy-absorbing power, reduces relying on for technology controlling and process; When strengthening car load safety guard-safeguard performance, reduced the tubing string cost.
Description of drawings
Fig. 1 is the schematic diagram of the steering column crumple endergonic structure of prior art;
Fig. 2 is the structural representation that the upper column jecket of prior art cooperates with lower column jecket;
Fig. 3 is the assembling schematic diagram of the steering column crumple endergonic structure of the embodiment of the invention;
Fig. 4 is the B-B cutaway view of Fig. 3;
Fig. 5 is the A-A cutaway view of Fig. 3;
Fig. 6 is the three-dimensional structure diagram of the outer mounting bracket of the embodiment of the invention;
Fig. 7 is the three-dimensional structure diagram of the contiguous block of the embodiment of the invention;
Fig. 8 is the three-dimensional structure diagram of the interior mounting bracket of the embodiment of the invention;
Fig. 9 is the upper column jecket of the embodiment of the invention and the structural representation of lower column jecket junction.
Description of reference numerals:
The outer mounting bracket of the present invention: 1-, 11-pilot hole, the 12-terrace of appearing on the stage, 13-leave from office terrace, mounting bracket in the 14-mounting hole, 2-, 21-locates gap, 22-injection moulding pin-and-hole, the 23-through hole, 3-friction shoe, 31-bolt, 4-injection moulding pin, the upper column jecket of 5-, column jecket under the 6-, 7-plastics adapter sleeve, 8-contiguous block, 81-engaging lug, 82-injection moulding pin-and-hole, 83-riveted holes, 84-rivet.
The upper mounting bracket of prior art: 91-, 92-installs aluminium block, 93-injection moulding pin, the upper column jecket of 94-, column jecket under the 95-, 96-uploads moving axis, 97-lower drive shaft, 98-injection moulding pin.
The specific embodiment
Below in conjunction with accompanying drawing specific embodiments of the invention are described in detail.
As shown in Figure 3, car steering tube column crumple endergonic structure comprises: outer mounting bracket 1, interior mounting bracket 2, friction shoe 3.The upper column jecket 5 of 1 pair of steering column of outer mounting bracket is circumferentially fixing, outer mounting bracket 1 has the pilot hole 11 that axially arranges along steering column, outer mounting bracket 1 is captiveed joint with vehicle body by mounting hole 14, friction shoe 3 is captiveed joint with interior mounting bracket 2 through pilot hole 11, friction shoe 3 compresses outer mounting bracket 1, outer mounting bracket 1 be connected mounting bracket 2 and connect by injection moulding pin 4, during crumple, friction shoe 3 and interior mounting bracket 2 move along pilot hole 11.
As shown in Figure 4, car steering tube column crumple endergonic structure comprises: outer mounting bracket 1, interior mounting bracket 2, contiguous block 8, friction shoe 3.Outer mounting bracket 1 has the pilot hole 11 that axially arranges along tubing string, outer mounting bracket 1 is captiveed joint with vehicle body, friction shoe 3 is captiveed joint with interior mounting bracket 2 through pilot hole 11, friction shoe 3 compresses outer mounting bracket 1, outer mounting bracket 1 and contiguous block 8 riveted joints, interior mounting bracket 2 is connected by injection moulding pin 4 with contiguous block 8, and during crumple, friction shoe 3 and interior mounting bracket 2 move along pilot hole 11.
During crumple, the contact surface of friction shoe 3 and outer mounting bracket 1 can be for contacting all the time, also can be for only contacting for some time.Preferably, the one side that outer mounting bracket 1 is compressed by friction shoe 3 has the terrace of appearing on the stage 12 and leave from office terrace 13, and the terrace 12 of appearing on the stage contacts with friction shoe 3, and leave from office terrace 13 has the gap with friction shoe 3.Friction shoe 3 contacts with the terrace 12 of appearing on the stage of outer mounting bracket 1 when adopting this structure crumple to begin, and need overcome this in the moving process and move friction force; Friction shoe 3 is thrown off with the terrace 12 of appearing on the stage subsequently, and leave from office terrace 13 is lower than the terrace 12 of appearing on the stage, and the leave from office terrace does not contact with friction shoe 3, and friction shoe 3 disappears with the friction force of outer mounting bracket 1, guarantees that crushing force is at a zone of reasonableness.
As shown in Figure 5, friction shoe 3 can be connected by welding, riveted joint, bolt with the captive joint of interior mounting bracket 2, preferably with bolts, change the thrust of the external mounting bracket of friction shoe by the screw-in degree of control screw thread, and then having changed the friction force of friction shoe 3 with the terrace 12 of appearing on the stage, crumple power also changes simultaneously thereupon.Preferably, friction shoe 3 is connected with the bolt that is fixedly connected as between the interior mounting bracket 2, and bolt 31 passes friction shoe 2 and pilot hole 11 is fixed with interior mounting bracket.Adopt bolt independently 31 to realize the compression of friction shoes 3 and outer mounting bracket 1, be convenient to the predetermincd tension of adjusting bolt, and be convenient to install.
Shown in Fig. 6~8, contiguous block 8 can be connected to realize to connect by welding, riveted joint, bolt with outer mounting bracket 1, and preferred the employing riveted, and rivet 84 passes riveted holes 83, and contiguous block 8 and outer mounting bracket 1 is fixing, is convenient to assembling.The structure of contiguous block 8 can have multiple variation, preferably, contiguous block 8 has two engaging lugs 81, and interior mounting bracket 2 is between two engaging lugs 81, injection moulding pin 4 passes the injection moulding pin-and-hole 22 of interior mounting bracket and the injection moulding pin-and-hole 22 of contiguous block, makes the fixing more stable of interior mounting bracket 2.
Interior mounting bracket 2 need to have good fixing when being connected by injection moulding pin 4 with contiguous block 8, preferably, interior mounting bracket 2 has the location gap 21 that cooperates with contiguous block 8, and location gap 21 axially arranges along steering column, and motion was without hindrance when crumple occured mounting bracket 2 in guaranteeing.Location gap 21 cooperates with the relevant position of contiguous block 8, provides good location for carrying out injection operation and installation.
As shown in Figure 9, the upper column jecket 5 of steering column can directly be realized being connected by interference fit with lower column jecket 6, also can realize connecting by other auxiliary members.Preferably, steering column comprises column jecket 5 and lower column jecket 6, passes through plastics adapter sleeve 7 captive joints between upper column jecket 5 and the lower column jecket 6.Adopt this structure to make the interference fit between the metal be converted into interference fit between metal and the plastics, greatly reduce this place's crumple power value.
Although the present invention is described in conjunction with above embodiment, but the present invention is not limited to above-described embodiment, and only being subjected to the restriction of claims, those of ordinary skills can easily make amendment to it and change, but do not leave essence design of the present invention and scope.