CN110155152B - Collapse energy-absorbing anti-drop steering column - Google Patents
Collapse energy-absorbing anti-drop steering column Download PDFInfo
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- CN110155152B CN110155152B CN201910505658.0A CN201910505658A CN110155152B CN 110155152 B CN110155152 B CN 110155152B CN 201910505658 A CN201910505658 A CN 201910505658A CN 110155152 B CN110155152 B CN 110155152B
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- 229910000831 Steel Inorganic materials 0.000 claims abstract description 79
- 239000010959 steel Substances 0.000 claims abstract description 79
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- 239000011148 porous material Substances 0.000 claims 1
- 238000000034 method Methods 0.000 description 8
- 238000001746 injection moulding Methods 0.000 description 6
- 230000008569 process Effects 0.000 description 6
- 238000010521 absorption reaction Methods 0.000 description 5
- 230000009471 action Effects 0.000 description 2
- 210000005069 ears Anatomy 0.000 description 2
- 238000004880 explosion Methods 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 238000010146 3D printing Methods 0.000 description 1
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 238000000418 atomic force spectrum Methods 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
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- 230000006378 damage Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
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- 230000004048 modification Effects 0.000 description 1
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- 230000002459 sustained effect Effects 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D1/00—Steering controls, i.e. means for initiating a change of direction of the vehicle
- B62D1/02—Steering controls, i.e. means for initiating a change of direction of the vehicle vehicle-mounted
- B62D1/16—Steering columns
- B62D1/18—Steering columns yieldable or adjustable, e.g. tiltable
- B62D1/19—Steering columns yieldable or adjustable, e.g. tiltable incorporating energy-absorbing arrangements, e.g. by being yieldable or collapsible
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Abstract
The invention discloses a collapsing energy-absorbing anti-falling steering column which comprises a steering column body (1), a locking mechanism (2), a mounting bracket (3) and an energy-absorbing steel belt (4), wherein the locking mechanism (2) is fixedly connected with the steering column body (1); the mounting bracket (3) is fixedly connected with the locking mechanism (2); the energy-absorbing steel belt (4) is fixed on an instrument beam of the vehicle; be provided with spout (43) on energy-absorbing steel band (4), be provided with fastening screw (5) in spout (43), energy-absorbing steel band (4) link to each other with installing support (3) through fastening screw (5), and installing support (3) are configured to and move down for energy-absorbing steel band (4) when steering column body (1) receives downward impact to drive fastening screw (5) and move along spout (43). The collapse energy-absorbing anti-drop steering column has controllable collapse peak force, stable steering column holding force during collapse and no downward drop of the steering column during collision.
Description
Technical Field
The invention relates to the technical field of vehicles, in particular to a collapsing energy-absorbing anti-falling steering column.
Background
With the rapid development of automobile technology, safety regulations have higher and higher requirements on automobile safety, and the collapsible steering column with the adjustable angle is popularized on passenger vehicles. When the automobile is violently collided, a driver often leans forward due to the strong stopping action so as to collide with a steering wheel, and in order to reduce the impact force of a steering column on a human body, the steering column of some automobiles is often designed to be crumpled and folded due to external extrusion when being collided, so that the impact force of the steering column transmitted to the human body due to collision can be dispersed.
In the related art, the collapse energy-absorbing steering column adopts an upper column tube and a lower column tube rivet point interference fit and a mounting bracket pull-off block injection molding structure, the structure has high requirement on the fit precision of the upper column tube and the lower column tube, and the riveting process is difficult to meet the requirement, so that the collapse force of the upper column tube and the lower column tube is difficult to control when the upper column tube and the lower column tube rotate; the steering column pull-off block and the mounting bracket are subjected to injection molding, and the pull-off force of an injection molding structure has more influence factors, such as injection molding amount, injection molding temperature, injection molding hole size and the like, so that the pull-off force is not easy to control, the tolerance range is large, and the collapse peak force and the holding force of the traditional structure column are not easy to control. The steering column with the traditional structure has no anti-drop structure after collapsing, and the steering column falls down in the collapsing process, so that the column cannot stably absorb energy.
In the process of implementing the invention, the inventor finds that the related art has at least the following problems: the steering column has large collapse peak force, large fluctuation range of the steering column holding force and downward falling in the collision process.
Disclosure of Invention
The embodiment of the invention provides a collapse energy-absorbing anti-falling steering column, which can stabilize the collapse energy-absorbing capacity of the steering column and avoid the falling of the steering column in collision. The specific technical scheme is as follows:
a collapsing energy-absorbing anti-drop steering column comprises a steering column body, a locking mechanism, a mounting bracket and an energy-absorbing steel belt, wherein the locking mechanism is fixedly connected with the steering column body; the mounting bracket is fixedly connected with the locking mechanism; the energy-absorbing steel belt is fixed on an instrument cross beam of the vehicle; the energy-absorbing steel belt is provided with a sliding groove, a fastening screw is arranged in the sliding groove, the energy-absorbing steel belt is connected with the mounting bracket through the fastening screw, and the mounting bracket is configured to move downwards relative to the energy-absorbing steel belt when the steering column body is impacted downwards and drive the fastening screw to move along the sliding groove.
Optionally, the mounting bracket includes a top plate, two side plates, two side wings connected to the side plates, and a connecting plate connecting the top plate and the locking mechanism, and each side wing is provided with a fastening screw mounting hole corresponding to the fastening screw.
Optionally, the energy-absorbing steel belt is arranged on the side wing and comprises a fixed part and a sliding part, and the sliding groove is arranged on the sliding part; the fixing part is provided with a rectangular hole, a fixing bolt is arranged in the rectangular hole, and the fixing bolt is fixedly connected with the instrument beam.
Optionally, the fixing portion is further provided with a downward arc-shaped protrusion.
Optionally, the energy-absorbing steel strip further comprises lower plate portions respectively arranged below the side wings, the fixing portions are connected with the lower plate portions through return-bending connecting portions, openings which are opened upwards are formed in the side wings, and the fixing bolts penetrate through the rectangular holes, the openings and the lower plate portions.
Optionally, the width of the sliding groove is gradually reduced along the moving direction of the mounting bracket.
Optionally, the locking mechanism and the connecting plate of the mounting bracket are fixedly connected by a bolt.
Optionally, the steering column body includes the upper column tube, set up the inside last steering spindle of upper column tube, with the lower steering spindle that the last steering spindle links to each other, the cover is established the lower steering spindle outside and with the lower column tube that the upper column tube links to each other, locking mechanism with upper column tube fixed connection.
Optionally, the upper column tube and the lower column tube are transition fitted, and the upper steering shaft and the lower steering shaft are clearance fitted.
Optionally, the energy-absorbing steel belt and the mounting bracket are both formed by stamping.
The beneficial effects of the embodiment of the application at least comprise:
the energy-absorbing anti-drop steering column that contracts that this application embodiment provided fixes the energy-absorbing steel band on the instrument crossbeam, and when the collision took place, locking mechanism drove the installing support and moves with the steering column body jointly, and the installing support takes place relative motion with the energy-absorbing steel band, nevertheless the installing support passes through fastening screw and links to each other with energy-absorbing steel band spout, consequently still can not drop steering column, and the energy-absorbing can be stabilized to the steering column.
The energy-absorbing steel belt is provided with the downward arc-shaped protrusion, so that the energy-absorbing steel belt is in line contact with the mounting bracket, the friction force between the energy-absorbing steel belt and the mounting bracket is reduced, meanwhile, the arc-shaped protrusion can provide a certain gap between the fixing part of the energy-absorbing steel belt and the mounting bracket, relative movement between the mounting bracket and the energy-absorbing steel belt is easier to occur, and the energy is absorbed in a collapsing manner.
Transition fit is adopted between an upper pipe column and a lower pipe column of the steering pipe column, clearance fit is adopted between an upper steering shaft and a lower steering shaft, the mounting process is simple, and the crumple influence on the steering pipe column is small.
The energy-absorbing steel belt and the mounting bracket of the steering column are both of a stamping structure, the size is easy to control, and therefore the absorption capacity can be adjusted by controlling the size of the energy-absorbing steel belt and the size of the mounting bracket, so that the steering column can be well matched with an air bag system and a steering wheel system, the control of the collapse peak force and the sustained force of the steering column is realized, and the aim of reducing the injury of a vehicle to a driver in collision is finally achieved.
The collapse energy-absorbing anti-falling steering column provided by the embodiment of the application has few installation parts and simple structure and process, and reduces the manufacturing cost while realizing the collapse anti-falling function of the steering column.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic perspective view of a collapsing, energy-absorbing and anti-falling steering column according to an embodiment of the present disclosure;
FIG. 2 is a schematic front view of a collapsing, energy-absorbing and anti-dropping steering column according to an embodiment of the present disclosure;
FIG. 3 is a schematic side view of a collapsing, energy-absorbing and anti-dropping steering column according to an embodiment of the present disclosure;
FIG. 4 is an enlarged view of a portion of the structure of a collapse energy-absorbing anti-drop steering column according to an embodiment of the present disclosure;
FIG. 5 is a schematic front view of a mounting bracket of a collapse energy-absorbing anti-drop steering column according to an embodiment of the present disclosure;
FIG. 6 is a schematic front view of an energy-absorbing steel strip of a collapse energy-absorbing anti-drop steering column according to an embodiment of the present disclosure;
FIG. 7 is a schematic sectional view of a collapsing energy-absorbing anti-dropping steering column according to an embodiment of the present disclosure;
FIG. 8 is a schematic cross-sectional view of a steering column body of a collapse energy-absorbing anti-drop steering column according to an embodiment of the present disclosure;
fig. 9 is a comparison graph of crushing force curves of a collapse energy-absorbing anti-drop steering column and other collapse structures provided in the embodiment of the present application.
The reference numerals denote:
1. a steering column body; 11. an upper column tube; 12. an upper steering shaft; 13. a lower steering shaft; 14. a lower column tube; 2. a locking mechanism; 3. mounting a bracket; 31. a top plate; 32. a side plate; 33. a side wing; 34. fastening a screw mounting hole; 35. an opening; 36. a connecting plate; 4. an energy-absorbing steel strip; 41. a fixed part; 42. a sliding part; 43. a chute; 44. a rectangular hole; 45. a lower plate portion; 46. a connecting portion; 5. fastening screws; 6. and (5) fixing the bolt.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
Based on the general concept of the application, the embodiment of the application provides a collapsing energy-absorbing anti-falling steering column which comprises a steering column body, a locking mechanism, a mounting bracket and an energy-absorbing steel belt, wherein the locking mechanism is fixedly connected with the steering column body; the mounting bracket is fixedly connected with the locking mechanism, the energy-absorbing steel belt is fixed on an instrument beam of the vehicle, a chute is arranged on the energy-absorbing steel belt, a fastening screw is arranged in the chute, the energy-absorbing steel belt is connected with the mounting bracket through the fastening screw, and the mounting bracket is configured to move downwards relative to the energy-absorbing steel belt when the steering column body is impacted downwards and drives the fastening screw to move along the chute.
The collapse energy-absorbing anti-drop steering column comprises a locking mechanism, a steering column body and a mounting support, wherein the locking mechanism is fixedly connected with the steering column body, and the mounting support is fixedly connected with the locking mechanism. When the vehicle collides, the reaction force generated by the explosion of the safety airbag is transmitted to the steering column body through the steering wheel, and the steering column body transmits the force to the mounting bracket through the locking mechanism. When the steering column body is impacted downwards due to the fact that the airbag or a human body impacts the steering wheel, the locking mechanism drives the mounting support to move downwards along with the steering column body. The mounting bracket is connected with the energy-absorbing steel belt through a fastening screw, and the fastening screw penetrates through a chute arranged on the energy-absorbing steel belt. When the steering column body drives the mounting bracket to move and collapse, the mounting bracket drives the fastening screw to move along the chute, and the energy-absorbing steel belt realizes the energy-absorbing function.
Because the energy-absorbing steel belt is fixed on the instrument crossbeam, and the mounting bracket is connected with the energy-absorbing steel belt through the fastening screw, when the mounting bracket and the energy-absorbing steel belt move relatively, the fastening screw fastened on the mounting bracket slides in the chute of the energy-absorbing steel belt, so that the steering column body cannot fall off, and the steering column can realize stable energy absorption.
In the collapse energy-absorbing anti-drop steering column provided by the embodiment of the application, referring to fig. 1, the steering column comprises a steering column body 1, a locking mechanism 2, a mounting bracket 3 and an energy-absorbing steel belt 4.
The locking mechanism 2 is fixedly connected with the steering column body 1. For example, referring to fig. 1, the locking mechanism 2 may be fitted over the steering column body 1.
The mounting bracket 3 is fixedly connected with the locking mechanism 2. For example, referring to fig. 1, the mounting bracket 3 and the locking mechanism 2 may be fixedly connected by two bolts respectively disposed at both sides of the locking mechanism 2.
The energy-absorbing steel belt 4 is fixed on the instrument beam. For example, the energy-absorbing steel strip 4 can be fixed to the instrument beam of the vehicle by a bolt.
Of course, in the present application, the fixing manner between the steering column body 1 and the locking mechanism 2, between the locking mechanism 2 and the mounting bracket 3, between the mounting bracket 3 and the energy-absorbing steel belt 4 is not limited to the fixing by bolts. For example, in other implementation manners of the embodiment of the present application, the locking mechanism 2 and the mounting bracket 3 may be fixed in a manner of bonding and bolting, so as to enhance the fixing strength therebetween and avoid the impact on the collapse energy absorption of the steering column due to fixing failure.
Referring to fig. 1 and 2, a sliding groove 43 is arranged on the energy-absorbing steel belt 4, a fastening screw 5 is arranged in the sliding groove 43, and the energy-absorbing steel belt 4 is connected with the mounting bracket 3 through the fastening screw 5. The mounting bracket 3 moves downward relative to the energy-absorbing steel belt 4 when the steering column body 1 is impacted downward, and drives the fastening screw 5 to move along the sliding groove 43.
For example, in one implementation manner of the embodiment of the present application, two energy-absorbing steel belts may be provided, and are respectively fixed to two sides of the mounting bracket, and each energy-absorbing steel belt may be provided with a sliding groove.
Of course, the present application is not limited to providing one runner on each energy-absorbing steel strip. In other implementation manners of the embodiment of the application, the energy absorption steel belt can be provided with two sliding grooves in parallel, and correspondingly, a fastening screw connected with the mounting bracket can be arranged in each sliding groove.
Referring to fig. 1, 2 and 5, the mounting bracket 3 may include a top plate 31, two side plates 32, and side wings 33 connected to the two side plates, respectively, and a connecting plate 36 connecting the top plate 31 and the locking mechanism 2, and each side wing 33 may be provided with a fastening screw mounting hole 34 corresponding to the fastening screw 5.
For example, in one implementation of the embodiment of the present application, referring to fig. 1, 2 and 5, the connection plate 36 may include a second top plate and second side plates disposed at both sides of the second top plate, so that the cross-sectional shape of the connection plate 36 in a direction perpendicular to the movement direction of the mounting bracket 3 may be a "door" shape. The second side plates can be arranged on two sides of the locking mechanism 2 and are fixedly connected with the locking mechanism 2 through bolts. The second top plate may be welded to the top plate 31. The section of the other part of the mounting bracket 3 except the connecting plate 36, which is perpendicular to the moving direction of the mounting bracket 3, can be in a shape of a Chinese character 'ji'. The side plates 32 may be connected to the top plate 31 at a certain inclination angle. The side wings 33 may be parallel to the plate surface of the top plate 31. The joints of the side plates 32, the top plate 31 and the side wings 33 can be provided with chamfers, so that the processing and forming are facilitated. In this embodiment, the angle adjusting device for adjusting the steering column angle in the vehicle may be used as a lock mechanism, that is, the lock mechanism may also have a function of adjusting the steering column angle.
Of course, the shape of the mounting bracket is not limited to that described above in this application. In other implementations of embodiments of the present application, the mounting bracket may include a flat plate and two right angle baffles. The right-angle baffle plates can be fixed on the two sides of the locking mechanism through bolts. The right-angle baffle is connected with the flat plate of the mounting bracket by bolts, so that the locking mechanism is fixedly connected with the mounting bracket.
Meanwhile, in the application, the energy-absorbing steel strip is not limited to be arranged on the side wing. In other implementation manners of the embodiment of the application, the top plate of the mounting bracket may also be provided with an energy-absorbing steel strip, and correspondingly, the top plate of the mounting bracket may also be provided with a fastening screw mounting hole.
Referring to fig. 6 and 7, the energy absorbing steel strip 4 may be provided on the side flaps 33, including the associated fastening portion 41 and the sliding portion 42. The slide groove 43 may be provided on the slide portion 42. The fixing portion 41 may be provided with a rectangular hole 44, and the rectangular hole 44 may be provided with a fixing bolt 6 therein. The fixing bolt 6 can be fixedly connected with the instrument beam.
For example, in one implementation of the embodiment of the present application, referring to fig. 6 and 7, the surface shape of the fixing portion 41 may be rectangular, and the side perpendicular to the moving direction of the mounting bracket 3 is a long side. The width of the sliding portion 42 may be gradually reduced in the moving direction of the mounting bracket 3. The maximum width of the sliding portion 42 may be smaller than the width of the fixing portion 41. The connection between the two can adopt arc transition connection.
Of course, in the present application, the shapes of the sliding portion and the fixing portion are not limited to those described above. In other implementations of the embodiments of the present application, the sliding portion may be provided in a rectangular shape having the same shape as the fixing portion.
Meanwhile, in the present application, the shape of the hole in which the fixing bolt is disposed is not limited to the rectangular hole. In other implementations of the embodiments of the present application, the hole for disposing the fixing bolt may also be round or square in shape.
Further, in this application, the number of rectangular holes is not limited to one for each energy-absorbing steel belt. In other implementation manners of the embodiment of the application, two rectangular holes can be arranged on each energy-absorbing steel belt in parallel in the movement direction perpendicular to the mounting bracket.
Referring to fig. 3, 4 and 7, the fixing portion 41 may be further provided with a downward arc-like projection.
For example, in one implementation of the embodiment of the present application, referring to fig. 3, 4 and 7, a rectangular hole 44 may be provided at a middle position of the fixing portion 41. The rectangular hole 44 may be provided at both sides thereof with ears protruding downward in an arc shape. A gap is provided between the ears and the rectangular aperture 44. The ear part is arranged at the side edge part of the gap close to the fixed part and protrudes downwards in an arc shape, so that the energy-absorbing steel belt 4 is in line contact with the mounting bracket 3, a certain gap is provided between the energy-absorbing steel belt 4 and the mounting bracket 3, and the friction force between the energy-absorbing steel belt 4 and the mounting bracket 3 is smaller than the impact force from the steering column, so that the relative motion is easy to occur, and the crumpling energy absorption is realized.
Of course, in the present application, the arrangement manner of the arc-shaped protrusion is not limited to the above description. In other implementation manners of the embodiment of the application, the hole wall of the rectangular hole can be downwards arranged to be protruded in an arc shape.
In the present application, the downward arc-shaped protruding direction of the rectangular hole wall is not limited. The direction of the arc-shaped protrusion can be perpendicular to the moving direction of the mounting bracket or parallel to the moving direction of the mounting bracket.
Meanwhile, in the present application, the arrangement manner for reducing the friction between the energy-absorbing steel strip and the mounting bracket is not limited to the above description. In other implementations of embodiments of the present application, a semi-cylinder may be disposed between the fixing portion and the mounting bracket. The top surface of the semi-cylinder can be welded on the lower surface of the fixing part. The curved surface of the semi-cylinder may contact the mounting bracket. At this time, a rectangular hole may be provided above the semi-cylinder, and a fixing bolt fixedly connected to an instrument cross beam of the vehicle may be provided in the rectangular hole.
Referring to fig. 1, 4 and 7, the energy absorbing steel strip 4 may further comprise a lower plate portion 45 disposed below the side flaps 33. The fixing portion 41 and the lower plate portion 45 may be connected by a bent-back connecting portion 46. The side flaps 33 may be provided with upwardly opening openings 35. The fixing bolt 6 can pass through 1 the rectangular hole 44, the opening 35 and the lower plate portion 45.
For example, in one implementation of the embodiment of the present application, the energy-absorbing steel strips 4 may be disposed above the side wings 33, and include a fixed portion 41 having a larger width and a sliding portion 42 having a smaller width. The lower plate portion 45 may be provided below the side wings 33 and have the same shape as the fixing portion 41. The connecting portion 46 may have a cross-sectional width much smaller than the width of the fixing portion 41 and the lower plate portion 45. A certain clearance may exist between the fixing portion 41 and the flank 33. The lower plate portion 45 and the side wing 33 can be attached to each other. The fixing bolt 6 can pass through the fixing portion 41 and the lower plate portion 45 and through the opening 35 provided on the side wing 33.
Of course, the shape of the energy absorbing steel strip is not limited to that described above in this application. In other implementations of embodiments of the present application, the energy-absorbing steel strip may be configured as a downward bent rectangle. The rectangle upper portion is located the flank top and is provided with the spout, and lower part sets up in the flank below. The fixing bolt can penetrate through the upper part and the lower part of the energy-absorbing steel belt. Furthermore, the lower part of the energy-absorbing steel belt can be also arranged to be triangular, and the top of the triangle can be provided with a bolt connected with the upper plate through an opening, so that the material loss of the energy-absorbing steel belt is reduced.
Meanwhile, in the present application, the number and the position of the openings are not limited. For example, in one implementation of the embodiments of the present application, referring to FIG. 5, one end edge of the flap 33 may be provided with an "n" shaped opening. The opening can be fixedly connected with the instrument beam through bolts. When the mounting bracket moves, the opening is disengaged from the bolt. In other implementation manners of the embodiment of the application, more openings can be arranged, so that the number of bolts for connecting the mounting bracket and the instrument beam is increased.
Further, in the present application, the number and arrangement of the fixing bolts are not limited to those described above. In other implementations of the embodiments of the present application, the fixing bolts may be divided into an upper fixing bolt disposed at the upper column pipe position and a lower fixing bolt disposed at the lower column pipe position. The upper fixing bolt and the lower fixing bolt can be fixed together with the welding nut on the instrument beam.
Referring to fig. 2 and 6, the width of the slide groove 43 may be gradually reduced in the moving direction of the mounting bracket 3.
For example, in one implementation of the embodiment of the present application, the width of the sliding slot 43 may first decrease sharply and then decrease slowly until the two sides of the sliding slot 43 are parallel. The width of the starting position of the slide groove 43 may be slightly larger than the diameter of the fastening screw.
Of course, the arrangement of the shape of the chute in the present application is not limited to that described above. In other implementations of embodiments of the present application, the shape of the chute may also be configured to decrease uniformly until the two ends converge to a point.
The length of the energy-absorbing steel belt is related to the collapsing distance, and the greater the collapsing distance is, the longer the length of the chute is, and the longer the length of the energy-absorbing steel belt is. The width of the sliding groove is gradually reduced along the movement direction of the mounting bracket, so that the sliding groove is gradually enlarged by the fastening screw along with the movement of the mounting bracket, and stable extrusion friction is provided. Under the action of the same explosion impact force, the collapse distance can be shortened, and the length of the energy-absorbing steel belt is reduced.
Referring to fig. 1, the locking mechanism 2 and the connecting plate 36 of the mounting bracket 3 may be fixedly connected by bolts.
For example, in one implementation of the embodiment of the present application, referring to fig. 1, an angle adjusting device for adjusting the steering column angle in a vehicle may be used as a locking mechanism, that is, the locking mechanism may also have a function of adjusting the steering column angle. The locking mechanism 2 may include a semi-annular member fitted over the upper column pipe, and a power member connected to the semi-annular member and disposed below the upper column pipe. The attachment plates 36 of the mounting bracket 3 may be bolted to both sides of the power member. The connecting plate 36 may be disposed above the steering column tube.
Of course, the locking mechanism is not limited to the above-described arrangement in the present application. In other implementations of embodiments of the present application, the locking mechanism may be provided as a hollow member having an inverted "concave" shape in cross-section perpendicular to the direction of movement of the mounting bracket. The concave part below the locking mechanism can be attached to the steering column. The upper top plate of the locking mechanism opposite to the concave part can be welded and fixed with the top plate of the mounting bracket. The locking mechanism and the joint part of the steering column can be connected through a bolt. The locking mechanism can move with the steering column without the bolt breaking.
In other implementations of the embodiments of the present application, the locking mechanism may further configure the upper top plate of the inverted "concave" shaped hollow member as a pallet turned inside out to both sides. The supporting plate and the mounting bracket can be fixedly connected through bolts.
Referring to fig. 8, the steering column body 1 may include an upper column tube 11, an upper steering shaft 12 disposed inside the upper column tube 11, a lower steering shaft 13 connected to the upper steering shaft 12, and a lower column tube 14 sleeved outside the lower steering shaft 13 and connected to the upper column tube 11. The locking mechanism 2 can be fixedly connected with the upper column tube 11.
For example, in one implementation of the embodiment of the present application, the upper steering shaft 12 may be partially disposed outside the upper column tube 11, and a portion beyond the upper column tube 11 may be connected to a steering wheel. The upper column tube 11 may be provided in a stepped shape. The lower steering shaft 13 may be disposed inside the upper steering shaft 12. The lower column tube 14 may be disposed inside the upper column tube 11. The steering shaft and the column tube can be in interference fit.
Referring to fig. 8, the upper column tube 11 and the lower column tube 14 may be in transition fit, and the upper steering shaft 12 and the lower steering shaft 13 may be in clearance fit.
Of course, the manner of fitting between the column tube and the steering shaft in the present application is not limited to that described above. In other implementations of embodiments of the present application, the upper column tube and the lower column can be riveted with interference fit.
The column tubes are in transition fit, the steering shafts are in clearance fit, sliding force between the column tubes can be controlled within 100N during collapse, the collapse influence on the steering column tube can be ignored, and accordingly collapse peak force is easy to control.
In one implementation of the embodiments of the present application, both the energy-absorbing steel band and the mounting bracket may be stamped and formed.
Of course, in the present application, the forming method of the energy-absorbing steel band and the mounting bracket is not limited to stamping, and in other implementation manners of the embodiment of the present application, a forming method that is easy to control the size of the component, such as welding, 3D printing, and the like, may also be adopted.
The peak steering column collapse force is related to the sustaining force and the size of the energy absorbing steel band and the size of the mounting bracket. Because the energy-absorbing steel belt and the mounting bracket are both formed by punching, the size is easy to control, and the peak force and the continuous force of the steering column can be well controlled.
Referring to fig. 9, it can be seen from the static crush test that the static crush peak force and holding force stability of the present application are significantly better than the conventional crush structure.
The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (7)
1. A collapse energy-absorbing anti-drop steering column is characterized by comprising a steering column body (1), a locking mechanism (2), a mounting bracket (3) and an energy-absorbing steel belt (4),
the locking mechanism (2) is fixedly connected with the steering column body (1);
the mounting bracket (3) is fixedly connected with the locking mechanism (2);
the energy-absorbing steel belt (4) is fixed on an instrument cross beam of the vehicle;
the energy-absorbing steel belt (4) is provided with a sliding groove (43), the width of the sliding groove (43) is gradually reduced along the movement direction of the mounting bracket (3), a fastening screw (5) is arranged in the sliding groove (43), the energy-absorbing steel belt (4) is connected with the mounting bracket (3) through the fastening screw (5), and the mounting bracket (3) is configured to move downwards relative to the energy-absorbing steel belt (4) when the steering column body (1) is impacted downwards and drive the fastening screw (5) to move along the sliding groove (43);
the energy-absorbing steel belt (4) is arranged on the mounting bracket (3) and comprises a fixed part (41) and a sliding part (42) which are connected, and the sliding groove (43) is arranged on the sliding part (42); be provided with slot (44) on fixed part (41), be provided with fixing bolt (6) in slot (44), fixing bolt (6) with instrument crossbeam fixed connection, the pore wall of slot (44) is the arcuation protrusion downwards, and the both sides of slot (44) have and are the convex ear of arcuation downwards, the ear with the clearance has between slot (44).
2. The collapse energy-absorbing anti-drop steering column according to claim 1, wherein the mounting bracket (3) comprises a top plate (31), two side plates (32), two side wings (33) respectively connected with the two side plates, and a connecting plate (36) connecting the top plate (31) and the locking mechanism (2), and each side wing (33) is provided with a fastening screw mounting hole (34) corresponding to the fastening screw (5).
3. The collapse energy-absorbing anti-drop steering column according to claim 2, wherein the energy-absorbing steel band (4) further comprises a lower plate portion (45) disposed below the side wing (33), the fixing portion (41) is connected to the lower plate portion (45) via a connecting portion (46) that is bent back, an opening (35) that opens upward is provided in the side wing (33), and the fixing bolt (6) passes through the rectangular hole (44), the opening (35), and the lower plate portion (45).
4. The collapse energy absorbing anti-drop steering column according to claim 2, wherein the locking mechanism (2) and the connecting plate (36) of the mounting bracket (3) are fixedly connected by bolts.
5. The collapse energy-absorbing anti-drop steering column according to claim 1, wherein the steering column body (1) comprises an upper column tube (11), an upper steering shaft (12) arranged inside the upper column tube (11), a lower steering shaft (13) connected with the upper steering shaft (12), a lower column tube (14) sleeved outside the lower steering shaft (13) and connected with the upper column tube (11), and the locking mechanism (2) is fixedly connected with the upper column tube (11).
6. The collapse energy absorbing anti-drop steering column according to claim 5, wherein the upper column tube (11) and the lower column tube (14) are transition fitted, and the upper steering shaft (12) and the lower steering shaft (13) are clearance fitted.
7. The collapse energy-absorbing anti-drop steering column according to claim 1, wherein the energy-absorbing steel band (4) and the mounting bracket (3) are both formed by stamping.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910505658.0A CN110155152B (en) | 2019-06-12 | 2019-06-12 | Collapse energy-absorbing anti-drop steering column |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910505658.0A CN110155152B (en) | 2019-06-12 | 2019-06-12 | Collapse energy-absorbing anti-drop steering column |
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| CN110155152A CN110155152A (en) | 2019-08-23 |
| CN110155152B true CN110155152B (en) | 2021-11-30 |
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| CN201910505658.0A Active CN110155152B (en) | 2019-06-12 | 2019-06-12 | Collapse energy-absorbing anti-drop steering column |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102022119870A1 (en) | 2022-08-08 | 2024-02-08 | Schaeffler Technologies AG & Co. KG | Energy absorption assembly, automotive safety steering column and kit-of-parts |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111645752A (en) * | 2019-11-21 | 2020-09-11 | 摩登汽车有限公司 | Steering column assembly |
| DE102022121115A1 (en) | 2022-08-22 | 2024-04-25 | Schaeffler Technologies AG & Co. KG | Length-adjustable control unit and steer-by-wire system |
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| CN110155152A (en) | 2019-08-23 |
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