CN212579967U - Tearing piece for energy absorption protection mechanism of automobile steering column - Google Patents
Tearing piece for energy absorption protection mechanism of automobile steering column Download PDFInfo
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- CN212579967U CN212579967U CN202021325798.4U CN202021325798U CN212579967U CN 212579967 U CN212579967 U CN 212579967U CN 202021325798 U CN202021325798 U CN 202021325798U CN 212579967 U CN212579967 U CN 212579967U
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Abstract
The utility model relates to a tear the piece, concretely relates to tear piece that is used for car steering column energy-absorbing protection mechanism. The L-shaped that the tear body formed for sheet metal bending, the vertical portion of tearing the body is provided with the convex hole that the punching press formed, and the vertical portion end of convex hole top is provided with the head of buckling, tears the violently straight portion of a body and is provided with the piece that tears that the punching press formed, tears the piece end and is provided with the piece of buckling towards decurrent, is provided with the fixed orifices on the piece of buckling. This tear piece cooperation pull-off lock, installing support and crossbeam connecting plate constitute car steering column energy-absorbing protection mechanism jointly, it is not enough to have solved current because of the power peak value of bursting that contracts leads to bursting the holding power, very easily causes the problem of secondary injury to the driver under the existing tubular column major structure condition of not changing, tears the piece through installing additional and has effectively promoted the holding power that bursts to make the holding power that bursts to contract remain stable, the specially adapted car steering column assembles the use.
Description
Technical Field
The utility model relates to a tear the piece, concretely relates to tear piece that is used for car steering column energy-absorbing protection mechanism.
Background
The existing automobile steering column generally adopts an interference collapse energy absorption mechanism with an upper column tube and a lower column tube separated from each other and an upper column tube installation pull-out lock pull-out energy absorption mechanism, so that the impact energy absorption function of the steering column is realized, when an automobile collides, external force borne by a steering wheel is transmitted to the steering column through a steering shaft, the steering column absorbs energy through the interference collapse energy absorption of the upper column tube and the lower column tube and the pull-out lock pull-out energy absorption (absorbing impact force) of the upper column tube and the lower column tube, namely, the pull-out force is provided by the mechanical interference force and the pull-out lock to achieve the protection purpose of absorbing energy, the continuous energy absorption is provided by the mechanical interference force to avoid secondary damage, and the purpose of protecting a driver is realized. However, the energy absorption force-displacement curve of the energy absorption protection mode forms a peak value due to static rotation of mechanical interference friction force, and after the peak value is superposed with the pull-out force generated by the pull-out lock pull-out energy absorption combination, the peak value of the collapse force is easily overhigh to cause insufficient collapse retention force, so that secondary damage is easily caused to a driver.
Disclosure of Invention
The utility model aims to provide a: the tearing piece for the automobile steering column energy-absorbing protection mechanism can effectively improve the collapse retention force and keep the collapse retention force stable on the premise of not increasing the peak value of the overall collapse force, thereby meeting the overall energy-absorbing requirement of a steering system, solving the problem that the existing collapse retention force is insufficient due to overhigh peak value of the collapse force, and easily causing secondary damage to a driver.
The technical proposal of the utility model is that
The utility model provides a tear piece for car steering column energy-absorbing protection mechanism, tear the piece and constitute its characterized in that by tearing a body: the L-shaped that the tear body formed for sheet metal bending, the vertical portion of tearing the body is provided with the convex hole that the punching press formed, and the vertical portion end of convex hole top is provided with the head of buckling, tears the violently straight portion of a body and is provided with the piece that tears that the punching press formed, tears the piece end and is provided with the piece of buckling towards decurrent, is provided with the fixed orifices on the piece of buckling.
The tearing sheet is sunken on the tearing piece body, and the overlapping thickness between the upper surface of the tearing sheet and the lower surface of the tearing piece body is 0.94-1.3 mm.
The height of the vertical part of the tearing part body is 30-35 mm, the length of the horizontal part of the tearing part body is 55-60 mm, and the width of the tearing part body is 28-32 mm.
The length of the tearing sheet is 50-55 mm, and the width of the tearing sheet is 18-2 mm.
And a blanking pre-tearing line is arranged between the tearing piece on the inner side of the bending piece and the tearing piece body, and the length of the blanking pre-tearing line is 3-5 mm.
An end face bending hole is formed in the end face of the bending position of the pull-release lock.
The utility model has the advantages that:
the tearing piece for the energy-absorbing protection mechanism of the automobile steering column is connected with a mounting plate on a steering column assembly through a fixing hole in a tearing piece by a fastening screw, a tearing body is connected with a fixed connecting plate on an automobile beam through a convex hole in the tearing body by the fastening screw, when an automobile collides, the steering column collapses, and after a pull-out lock is pulled out, two mounting points of the tearing body generate displacement in two opposite directions, wherein an upper column tube of the steering column assembly drives the tearing piece to start deformation and displacement along a blanking groove, and when the deformation and displacement exceeds a pre-tearing opening, the tearing piece starts to tear along a blanking path, so that stable energy-absorbing protection is realized, the integral energy-absorbing requirement of a steering system is met, the problems that the collapse retention force is insufficient due to overhigh peak value of the collapse force and secondary damage is easily caused to a driver are solved. The tearing piece has the characteristics of simple structure and good practicability, effectively improves the collapse retention force through the tearing piece under the condition of not changing the main structure of the existing pipe column, keeps the collapse retention force stable, and is particularly suitable for assembling and using the automobile steering pipe column.
Drawings
FIG. 1 is a schematic structural view of a tearing member of the present invention;
fig. 2 is a schematic bottom view of the tearing member of the present invention;
FIG. 3 is a schematic cross-sectional view of the tearing member of the present invention;
FIG. 4 is a schematic view of the structure of the slide fastener of the present invention;
fig. 5 is a schematic top view of the assembly of the pull-off lock of the present invention;
FIG. 6 is a schematic top view of the tear-away body of the present invention;
FIG. 7 is a perspective view of the tear-off body of the present invention;
FIG. 8 is a schematic view of the automobile steering column after being impacted;
FIG. 9 is a schematic diagram showing the distribution of crush suction after impact on the steering column;
FIG. 10 is a graph of energy absorption of tear tabs with blanked pre-tear lines;
FIG. 11 is a graph of tear energy absorption for a blanked pre-tear line;
FIG. 12 is a graph illustrating a collapse curve of a conventional steering column for an automobile;
FIG. 13 is a diagram showing a collapse curve of a steering column of an automobile to which the present invention is applied;
fig. 14 is a schematic diagram of the tearing member of the present invention.
In the figure: 1. the automobile steering column comprises a tearing piece body, 2, convex holes, 3, bending heads, 4, tearing pieces, 5, bending pieces, 6, fixing holes, 7, blanking pre-tearing lines, 8, mounting supports, 9, a pulling-out lock, 10, end face bending holes, 11, an automobile steering column, 12, upper assembling fixing holes, 13, rolling edges, 14, assembling grooves, 15, tearing piece fixing holes and 16, and fastening bolts.
Detailed Description
This a tear piece for car steering column energy-absorbing protection mechanism comprises tearing a body 1, tears an L shape that body 1 formed for sheet metal (cold chain rolls mild steel board Q/BQB 403) bending type, is provided with convex hole 2 (through-hole) that the punching press formed on tearing a body 1's vertical portion, and convex hole 2 is used for when tearing a assembly, through fixing bolt and pull-out lock 9 be connected. The vertical portion end above convex hole 2 is provided with bending head 3, and bending head 3 is used for hooking pull-off lock 9 when tearing the assembly and realizes spacing between the two, and the vertical portion height of tearing a body 1 is 30-35 mm, and the length of the horizontal straight portion of tearing the body is 55-60 mm, and the width of tearing the body is 28-32 mm.
The horizontal straight part of the tearing piece body 1 is provided with a tearing piece 4 formed by punching, the length of the tearing piece 4 is 50-55 mm, and the width of the tearing piece 4 is 18-2 mm. The tearing sheet 4 is sunken on the tearing piece body 1, and the overlapping thickness between the tearing sheet 4 and the tearing piece body 1 is 0.94-1.3 mm. The end of the tearing sheet 4 is provided with a bending sheet 5 facing downwards, and the bending sheet 5 is provided with a fixing hole 6. The bending piece 5 and the fixing hole 6 are used for connecting and fixing with the mounting bracket 10.
A blanking pre-tearing line 7 formed by punching is arranged between the tearing piece 4 at the inner side of the bending piece 5 and the tearing piece body 1, and the length of the blanking pre-tearing line 7 is 3-5 mm. The purpose of punching the pre-tearing line 7 is to break a tearing point, so that after the steering column is collapsed when an automobile collides and the pull-out lock 9 is pulled out, the tearing sheet 4 starts to tear along a punching groove between the tearing sheet 4 and the tearing member body 1 by taking the punching pre-tearing line 7 as a starting point, so that the shearing stress is concentrated to eliminate a tearing peak value, thereby realizing stable energy absorption protection and meeting the integral energy absorption requirement of a steering system (see the attached figures 1-3).
Because the tearing piece body 1 is formed by bending a metal plate, and the tearing piece 4 is formed by stamping, the tearing force can be controlled by adjusting the overlapping thickness of the tearing piece body 1 and the tearing piece 4, and the peak value of the tearing force is eliminated. In order to show the effect of the overlapping thickness of the tear-off body 1 and the tear-off tab 4 on the magnitude of the tearing force, the applicant verified it by experiments and the results are shown in table 1:
table 1: influence of the overlapping thickness of the tear-off body 1 and the tear-off tab 4 on the magnitude of the tearing force
As can be seen from table 1, as the overlapping thickness of the tearing member body 1 and the tearing sheet 4 increases, the tearing force thereof also increases.
This tear piece cooperation pull-off lock 9, installing support 10 and crossbeam connecting plate constitute car steering column energy-absorbing protection mechanism jointly, tear the piece when the assembly, at first will pull-off lock 9 through U type mouth activity card dress on the assembly recess 14 of the installing support 8 both sides of car steering column 11, pull-off lock 9 is the bent system of sheet metal, and the U type sandwich body that corresponds with the assembly recess shape, it is provided with the last assembly fixed orifices 13 and the lower assembly fixed orifices that the punching press formed to appear from top to bottom on the pull-off lock 9, it is waist type hole to go up assembly fixed orifices 12 and lower assembly fixed orifices. The rolling edges 13 formed by punching the assembly fixing holes are arranged below the upper assembly fixing holes 12 and above the lower assembly fixing holes, and the rolling edges of the upper assembly fixing holes 12 and the rolling edges of the lower assembly fixing holes are in contact connection with each other so as to increase the integral strength of the pull-off lock 9 in bending and the stability in assembly and limit the pull-off lock 9 in assembly; the end face of the bending part of the pull-off lock 9 is provided with an end face bending hole 10 (see the attached figures 4-5).
After the pull-out lock 9 is assembled, the tearing piece body 1 is placed on the pull-out lock 9, so that the vertical part of the tearing piece body 1 is attached to the pull-out lock 9, wherein the bending head 3 on the tearing piece body 1 is hooked with the end face bending hole 10 of the pull-out lock 9, and meanwhile, the tearing piece body 1 is fixedly installed on the installation support 8 through the fixing hole 6 through the fastening bolt 16 and the tearing piece fixing hole 15; the tearing piece body 1 is connected with a fixed connecting plate on an automobile beam through a fastening screw which penetrates through the convex hole 2, the upper assembling fixing hole 13 and the lower assembling fixing hole on the tearing piece body 1, so that in work, the interference collapse energy absorption mechanism and the pull-out lock pull-out energy absorption mechanism of the automobile steering column 11 are matched to realize the function of absorbing impact energy of the automobile steering column 11. That is, when the steering column collapses after the automobile collides, the two mounting points of the tear tab 4 generate displacements in two opposite directions, i.e. in the directions of E and F (as shown in fig. 8), the upper column tube drives the tear tab 4 to start to deform along the blanking groove, and as the deformation displacement gradually increases, when the deformation displacement exceeds the blanking pre-tearing line 7, the tear tab 4 starts to tear along the blanking path, and the tear tab 4 starts to tear and absorb energy. In the process of tearing and absorbing energy by the tearing sheet 4, the steering column collapse force can be kept stable without increasing the peak value of the collapse force (see the attached figures 6-11).
As shown in fig. 9, before the tearing member body 1 is not installed, the peak value of the crumpling force of the curve A, B in fig. 9 is formed by overlapping the pull-out force of the tubular column crumpling energy absorption point and the pull-out lock crumpling point; the collapse retention force is provided by the collapse energy absorption point of the pipe column (see table 2, lines 1 and 2), after the tearing part body 1 is additionally installed, the curve C in the attached figure 9 does not increase the peak value of the collapse force, only the collapse retention force is increased (see table 2, line 3), and the collapse energy absorption force distribution is specifically shown in table 2:
table 2: collapse energy absorption force distribution meter
| Sequence number (xing) | Collapse energy absorption point | Peak | Collapse retention | |
| 1 | Upper and lower tubular column | Provide for | Provide for | |
| 2 | Pull-off lock | Provide for | ||
| 3 | Tear tab | Provide for |
As can be seen from the attached figure 10, the tearing sheet 4 can tear the energy absorption process, so that the integral energy absorption requirement of the steering system is met. As can be seen from fig. 11, the load is much larger than that of the tearing sheet 4 shown in fig. 10, and the tearing energy absorption process of the tearing sheet 4 is directly influenced.
In order to further show the technical effects of the present invention, the applicant conducted a comparative test on the existing steering column of the automobile and the steering column of the automobile with the energy-absorbing protection mechanism, and the results are as follows (see fig. 12 and 13):
as can be seen from fig. 12, the actual crush curve collapse peak of the conventional automobile steering column can meet the requirement, and the collapse retention force is lower than the requirement.
As can be seen in FIG. 13, the crush retention is fully satisfactory with the addition of a tear. A conclusion is drawn; effectively promoted the collapse holding power of automobile steering column through installing additional and tearing the piece to make the collapse holding power remain stable, solved present because of the collapse power peak value too high lead to collapsing the holding power not enough, very easily cause the problem of secondary damage to the driver.
Calculating the collapse force of the existing automobile steering column:
composition of suction capacity
Wherein:
Ff: peak value of steering column assembly collapse force
Ft: pulling-out force of steering column pulling-out lock
Fz0: maximum static friction force of upper and lower column tubes
Fb: rotating shaftContinuous retention of energy absorbed into the pipe string
Fz: sliding friction force of upper and lower column tubes
Above, the energy absorption force of each energy absorption point is synthesized into the absorption force of the steering column assembly. F of the automobile steering column collapse scheme with the structurefCan meet the design requirements, but FbLower than the design requirement. And FfAnd FbAnd (3) correlation: fbIncrease, FfIs inevitably increased; fbDecrease of FfAnd necessarily reduced. The automobile steering column with the structure has no universality.
The utility model discloses the power of collapsing of steering column calculates:
composition of suction capacity
Wherein:
Ff: peak value of steering column assembly collapse force
Ft: pulling-out force of steering column pulling-out lock
Fz0: maximum static friction force of upper and lower column tubes
Fsx: tear sheet deformation force (less than 100N tested, not considered)
Fb: sustained retention of steering column energy absorption
Fz: sliding friction force of upper and lower column tubes
Fs: tear force of tear tab
The automobile steering column with the structure has the characteristics that: without changing Ff、Fz0、FzUnder the premise of increasing FbThe structure scheme can solve the problem that the continuous holding force of the existing automobile steering column is insufficient, and has universality.
By tearing the piece, the pull-off lock 9, the automobile steering column energy-absorbing protection mechanism that installing support 10 and crossbeam connecting plate constitute jointly, it is not enough to have solved present because of the power peak value of bursting of contracting leads to the holding power that bursts to contract too high, very easily cause the problem of secondary damage to the driver, have simple structure, characteristics that the practicality is good, under the existing tubular column major structure condition of not changing, tear the piece through installing additional and effectively promoted automobile steering column's the holding power that bursts to contract, and make automobile steering column's the holding power that bursts to contract remain stable, the specially adapted automobile steering column assembles the use.
Claims (5)
1. The utility model provides a tear piece for car steering column energy-absorbing protection mechanism, it comprises tearing a body (1), its characterized in that: the L-shaped tearing piece is characterized in that the tearing piece body (1) is formed by bending a metal plate, a convex hole (2) formed by punching is formed in the vertical portion of the tearing piece body (1), a bending head (3) is arranged at the end of the vertical portion above the convex hole (2), a tearing piece (4) formed by punching is arranged at the transverse straight portion of the tearing piece body (1), a bending piece (5) facing downwards is arranged at the end of the tearing piece (4), and a fixing hole (6) is formed in the bending piece (5).
2. The tearing piece for the energy absorption protection mechanism of the automobile steering column according to claim 1, characterized in that: the tearing sheet (4) is sunken on the tearing piece body (1), and the overlapping thickness between the upper surface of the tearing sheet (4) and the lower surface of the tearing piece body (1) is 0.94-1.3 mm.
3. The tearing piece for the energy absorption protection mechanism of the automobile steering column according to claim 2, characterized in that: the height of the vertical part of the tearing piece body (1) is 30-35 mm, the length of the horizontal straight part of the tearing piece body (1) is 55-60 mm, and the width of the tearing piece body (1) is 28-32 mm.
4. The tearing piece for the energy absorption protection mechanism of the automobile steering column according to claim 2, characterized in that: the length of the tearing sheet (4) is 50-55 mm, and the width of the tearing sheet (4) is 18-2 mm.
5. The tearing piece for the energy absorption protection mechanism of the automobile steering column according to claim 1, characterized in that: a blanking pre-tearing line (7) is arranged between the tearing piece (4) on the inner side of the bending piece (5) and the tearing piece body (1), and the length of the blanking pre-tearing line (7) is 3-5 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021325798.4U CN212579967U (en) | 2020-07-08 | 2020-07-08 | Tearing piece for energy absorption protection mechanism of automobile steering column |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021325798.4U CN212579967U (en) | 2020-07-08 | 2020-07-08 | Tearing piece for energy absorption protection mechanism of automobile steering column |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212579967U true CN212579967U (en) | 2021-02-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021325798.4U Active CN212579967U (en) | 2020-07-08 | 2020-07-08 | Tearing piece for energy absorption protection mechanism of automobile steering column |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212579967U (en) |
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- 2020-07-08 CN CN202021325798.4U patent/CN212579967U/en active Active
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