JP2018184064A - Steering device - Google Patents

Abstract

PURPOSE: To provide a steering device, having a telescopic adjustment mechanism and a shock absorbing mechanism in secondary collision, capable of maintaining a preset appropriate energy absorbing load at the secondary collision.CONSTITUTION: The steering device includes: a column pipe 1; a hanger bracket A; a stationary bracket 5; and a fastening device 6 for fastening and unfastening the stationary bracket 5 and the hanger bracket A. A side plate part 21 of the hanger bracket A is formed with a telescopic slot 3 and a shock absorbing slot 4 having a collapsed side part 41 to be collapsed toward the backward side from the forward side. At least one of a stationary side part 51 and a side plate part 21 is formed with a thin wall part 23 around the collapsed side part 41 and along the collapsed side part 41. A recessed part 24 formed by the thin wall part 23 is positioned on an abutment surface side between the stationary side part 51 and the side plate part 21.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a steering apparatus including a telescopic adjustment mechanism and a shock absorbing mechanism in a secondary collision, and capable of maintaining a set appropriate energy absorption load at the time of a secondary collision.

  2. Description of the Related Art Conventionally, there are various types equipped with a telescopic adjustment mechanism and an impact absorbing device for protecting a driver at the time of a secondary collision. One of the common structures of this type of steering device is a telescopic adjustment slot and a long hole for energy absorption during a secondary collision in the longitudinal direction. There is a type in which the bolt shaft of the fastening tool that absorbs collision energy while moving relative to the long hole for energy absorption exists.

  Specifically, the width of the axially long hole is made smaller than the diameter of the bolt shaft, and when an impact load of a predetermined level or more is applied during a secondary collision, the peripheral portion of the axially elongated hole is moved by relative movement with the bolt shaft. Is moved while being crushed, and at this time the impact during the secondary collision is absorbed. This type of energy absorption mechanism is the simplest and most common. As a prior art having the structure as described above, there is Japanese Patent Application Laid-Open No. 2002-337699. Hereinafter, Patent Document 1 will be outlined. In addition, in description, the code | symbol of patent document 1 attaches | subjects parenthesis and uses it as it is.

  In Patent Document 1, the short diameter of the shock absorbing region (42a) is set to be smaller than the maximum outer diameter of the shaft (51) in the direction orthogonal to the relative movement direction. The impact is absorbed by the shaft (51) expanding the impact absorbing region (42a).

JP 2002-337699 A

  In Patent Literature 1, when the lever for telescopic adjustment is tightened, both side walls (22a, 22b) of the second upper bracket (22) in which the telescopic adjustment portion and the energy absorbing portion are formed, and the first upper bracket (21 ) In contact with both side walls (21a, 21b). The upper side of the shock absorbing region (42a) of the second through hole (42) of the second upper bracket (22) is plastically deformed by the impact at the time of collision to absorb energy.

  In the impact energy absorption process at the time of the collision, the upper side portion is crushed in the shock absorbing region (42a) of the second through hole (42). By this crushing, each of the side walls (22a, 22b) is crushed. The meat part around the crushing part of the shock absorbing area (42a) will protrude to the outside, and this protruding part will become a burr and will exert strong pressure on both side walls (21a, 21b) of the first upper bracket (21). It will have and abut.

  The burrs generated from the crushing area of the shock absorbing region (42a) interfere with the both side walls (21a, 21b) of the first upper bracket (21), thereby causing the both side walls (22a, 22a, 22a, 22) of the second upper bracket (22). 22b) and the both side walls (21a, 21b) of the first upper bracket (21) are applied as a new friction load when they move relative to each other. This load affects the impact energy absorption at the time of collision, and a design in consideration of such a load must be performed.

  However, the amount of protrusion of the burr cannot be set easily, varies depending on the situation, and it is extremely difficult to perform an appropriate design. Accordingly, an object of the present invention is to provide a steering device capable of preventing a burr interference caused by plastic deformation of a shock absorbing long hole in shock absorption in a secondary collision and performing a stable energy absorbing operation. is there.

  In view of the above, the inventor has intensively and intensively studied to solve the above-mentioned problems. As a result, the inventor of the present invention can be applied to a column pipe, a hanger bracket fixed to the column pipe, and both sides in the width direction of the hanger bracket. A fixing bracket having a fixing side portion for clamping, and a fastening tool having a bolt shaft for tightening and releasing the fixing bracket and the hanger bracket, and the hanger bracket has side plate portions on both sides in the width direction. The side plate portion has a telescopic elongated hole in which the bolt shaft can be inserted from the front side toward the rear side, and an impacted side portion that is crushed by the bolt shaft when the bolt shaft is relatively moved. Absorption oblong holes are formed, and a thin portion is formed in at least one of the fixed side portion or the side plate portion so as to be along the crush side portion and along the crush side portion. The recessed portion which is more formed by the steering device in which is located the contact surface between the side plate portion and the fixed side portions, the above-mentioned problems are eliminated.

  According to a second aspect of the present invention, in the steering device according to the first aspect, the concave portion is a steering device formed on the side plate portion, thereby solving the above problem. According to a third aspect of the present invention, in the steering device according to the first aspect, the concave portion is formed on the fixed side portion to solve the above problem. According to a fourth aspect of the present invention, in the steering device according to the first aspect, the concave portion is formed on the side plate and the fixed side portion to solve the above problem.

  The invention according to claim 5 is the steering apparatus according to any one of claims 1, 2, 3 or 4, wherein the thin part has the same thickness, thereby solving the above-mentioned problem. did. The steering apparatus according to any one of claims 1, 2, 3 and 4, wherein the thin portion is formed such that the thickness increases as the distance from the periphery of the shock absorbing elongated hole increases. The above-described problem has been solved by using the steering device.

  The invention according to claim 7 is the steering device according to any one of claims 1, 2, 3, 4, 5, or 6, wherein the crushed side portion of the shock absorbing elongated hole extends from the front side to the rear side. The thin portion around the crush side is formed so as to gradually expand in the vertical direction from the front side to the rear side of the shock absorbing long hole. By solving the above problem, the above problem was solved.

  In the first aspect of the present invention, the protruding portion of the shattered side portion of the shock absorbing long hole in the energy absorbing operation at the time of the occurrence of the secondary collision interferes with the inner side surface of the fixed side portion of the fixing bracket, thereby affecting the energy absorption. Can be prevented. Accordingly, it is possible to easily set an optimum energy absorption load by considering only the crushing load of the crushing side portion without considering the interference with the burr.

  To describe the above effect in detail, a thin portion is provided on at least one of the inner side surface of the fixed side portion and the side plate portion of the hanger bracket around the crushing side portion, which is the portion where the shock absorbing long hole is crushed, and the thin portion The formed recess is positioned on the contact surface side between the fixed side of the fixed bracket and the side plate of the hanger bracket. Here, when the concave portion by the thin wall portion is provided in the side plate portion of the hanger bracket, if the impact absorbing long hole and the bolt shaft of the fastener perform relative movement at the time of the secondary collision, the bolt shaft is collapsed. A thin part will be crushed with a side part.

  At this time, the recessed portion formed by the thin portion faces the fixed side portion side of the fixing bracket, and the burr generated by the crushing is contained in the recessed portion. Therefore, the protruding portion of the meat due to crushing does not reach the fixed side portion of the fixing bracket, and interference due to the contact of the protruding portion with the fixed side portion does not occur. Therefore, in designing the energy absorbing structure at the time of the secondary collision, it is not necessary to consider the protrusion of the meat due to the crushing of the shock absorbing long hole, and the design can be simplified. Further, it can also be used for a steering apparatus having a tilt adjusting mechanism.

  Further, in the case where the recessed portion by the thin wall portion is provided on the fixed side portion of the fixed bracket, when the bolt shaft crushes the crushed side portion at the time of the secondary collision, the burr generated by the crushing protrudes to the fixed side portion side of the fixed bracket. However, since the recessed part formed so that the periphery of a to-be-crushed side part and a to-be-crushed side part may be formed in a fixed side part, a burr | flash will be settled in a recessed part. Thereby, the optimal energy absorption load can be easily set without interference between the burr generated by crushing and the fixed side portion.

  In the invention of claim 2, since the recess is formed in the side plate, it is possible to reliably accommodate the protruding portion from the collapsed side portion at the time of the secondary collision. In the invention of claim 3, since the recess is formed on the fixed side portion, the effect is substantially the same as that of claim 2. The invention of claim 4 is particularly suitable when the amount of the protruding portion from the crushing side portion is large.

  In the invention of claim 5, since all the thicknesses of the thin portions are the same, it becomes an extremely suitable structure in which the thin portions can be easily pressed. In the invention of claim 6, since the thin wall portion is formed so that the wall thickness increases as the distance from the peripheral edge of the shock absorbing elongated hole increases, when the thin wall portion is crushed together with the crush side, As the process proceeds, the resistance to crushing increases, and the energy absorption operation by the vehicle type can be changed variously.

  In the invention of claim 7, the crushed side portion of the shock absorbing long hole is formed to be inclined so that the vertical direction becomes narrower from the front side toward the rear side, and the thin portion around the crushed side portion Is formed so that it gradually expands in the vertical direction from the front side to the rear side of the shock absorption slot, so that the resistance load gradually increases in the process from the beginning to the end of the energy absorption operation at the time of the secondary collision. It can be set as a very suitable structure with respect to the structure to perform.

(A) is a side view of a steering device according to the first embodiment of the present invention where a recess is formed and has a first type of shock absorbing long hole and a thin wall portion, and (B) is Y1-Y1 of (A). An arrow cross-sectional enlarged view, (C) is an enlarged view in which (α) part of (A) is partially omitted. (A) is a 1st embodiment in the formation part of a column pipe and a dent part in the present invention, and is a principal part enlarged view of a hanger bracket which has the 1st type of shock absorption long hole, and a thin part, (B) is (A) ) Is an enlarged sectional view taken along the line Y2-Y2, and (C) is an enlarged view of the (β) part of (B). (A) is an enlarged view of the main part of the hanger bracket showing the structure of the second type of shock absorbing long hole and the thin part in the present invention, and (B) is the structure of the third type of shock absorbing long hole and the thin part in the present invention. The main part enlarged view of the hanger bracket which shows this, (C) is the principal part enlarged view of the 4th type of the shock absorption long hole in this invention, and the hanger bracket which shows the structure of a thin part, (D) is the shock absorption length in this invention The main part enlarged view of the hanger bracket showing the fifth type of hole and the structure of the thin wall part, (E) is an enlarged view of the main part of the hanger bracket showing the structure of the sixth type of shock absorbing long hole and the thin part in the present invention. is there. (A) is a main part side view showing an initial stage of energy absorption of a shock absorbing long hole and a thin part at the time of a secondary collision in the present invention, (B) is an enlarged cross-sectional view taken along arrow Y3-Y3 in (A), (C ) Is a side view of the main part showing an intermediate process of energy absorption between the shock absorbing long hole and the thin wall portion during secondary collision, (D) is an enlarged sectional view taken along arrow Y4-Y4 in (C), and (E) is secondary collision. The principal part side view which shows the energy absorption final process of the shock absorption long hole and the thin part at the time, (F) is the Y5-Y5 arrow expanded sectional view of (E). (A) is a principal part expanded sectional view which made the corner part of the dent part formed by the thin part of 1st Embodiment in circular arc shape in the formation location of the dent part in this invention, (B) is a thin part linear shape The principal part expanded sectional view made into the slope is (C), The principal part expanded sectional view which made the thin part the arc-shaped slope. (A) is an impact absorption long hole and an enlarged sectional view of the thin wall portion of the embodiment in which the wall thickness of the thin wall portion is reduced in the present invention, and (B) is an impact absorption length of the embodiment in which the height size of the thin wall portion is large. It is an expanded sectional view of a hole and a thin part. It is a principal part enlarged view of the hanger bracket provided with the thin part expanded to an up-down direction toward the back side from the front side of the shock absorption long hole in this invention. (A) is the principal part longitudinal front view which shows the structure of 2nd Embodiment in the formation location of the dent part of this invention, the state before the secondary collision of a dent part, and the accommodation state of the protrusion part at the time of a secondary collision. B) is a main part longitudinal cross-sectional front view showing the configuration of the third embodiment and the state before the secondary collision of the concave part and the state of accommodation of the protruding part at the time of the secondary collision in the formation part of the concave part of the present invention. It is a side view of the hanger bracket of embodiment which provided the protruding plate piece in the shock absorption long hole in this invention.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. Here, there are a front side and a rear side as wordings indicating directions in the present invention. The front side and the rear side indicate directions set on the basis of the front-rear direction of the automobile when the steering device of the present invention is mounted on the automobile.

  Specifically, in each component of the steering device, the front wheel side of the automobile is the front side, and the steering wheel (steering wheel) 92 side is the rear side (see FIG. 1A). The main configuration of the present invention is mainly a column pipe 1, a hanger bracket A, a fixing bracket 5, and a fastener 6 as shown in FIGS. Hereinafter, the fixing bracket 5 and the fastener 6 will be described, and then the hanger bracket A will be described.

  The fixed bracket 5 includes fixed side portions 51 and 51 formed on both sides in the width direction, a mounting top portion 52 and the like. Both fixed side portions 51, 51 are formed with adjustment holes 53, 53 that are elongated in the substantially vertical direction or the vertical direction (see FIG. 1). The fastening tool 6 includes a bolt shaft 61, a lock lever portion 62, a fastening cam 63, and a nut 64 (see FIG. 1C).

  The fastening tool 6 connects the fixed bracket 5 and the hanger bracket A. The column pipe 1 is internally provided with an intermediate portion of a steering shaft 91, and a steering wheel (handle) 92 is attached to the tip of the steering shaft 91 protruding from the rear side of the column pipe 1 [FIG. )reference〕.

  The hanger bracket A is composed of two side plate portions 21 and a bottom plate portion 22 which are opposed to each other with a predetermined interval, and these are integrally formed of a metal plate [FIG. 1 (B), FIG. (See (B)). Both side plate portions 21 and 21 have the same shape, are arranged so as to extend along the axial direction of the column pipe 1 and to be parallel to each other at a predetermined interval on the lower side in the diameter direction of the column pipe 1, The upper end of the side plate portion 21 is fixed to the column pipe 1 by welding [see FIG. 1 (C)].

  The lower ends of the side plate portions 21 and 21 are connected by the bottom plate portion 22, and the cross-sectional shape perpendicular to the longitudinal direction is formed in a substantially inverted gate shape or a square U shape by the side plate portions 21 and 21 and the bottom plate portion 22. [Refer to FIG. 1 (B) and FIG. 2 (B)]. Telescopic long holes 3 and shock absorbing long holes 4 are formed in the side plate portions 21 and 21, respectively (see FIG. 1C, FIG. 2A, etc.).

  The telescopic elongated hole 3 and the shock absorbing elongated hole 4 are formed as one continuous elongated hole whose longitudinal direction is the front-rear direction of the hanger bracket A (see FIG. 1C). The telescopic slot 3 is a part used for telescopic adjustment. The shock absorbing long hole 4 is a part used when the steering column moves toward the front side in order to absorb the shock in a secondary collision.

  The vertical dimension of the telescopic elongated hole 3 is larger than the diameter of a bolt shaft 61 of a fastener 6 described later, and the bolt shaft 61 can be inserted with an appropriate margin. In the telescopic adjustment, the hanger bracket A moves together with the column pipe 1 with respect to the bolt shaft 61 within the range of the telescopic elongated hole 3 and is locked by the fastening tool 6 at an appropriate position.

  The shock absorbing long hole 4 and the bolt shaft 61 move relative to each other, and the bolt shaft 61 is in contact with a predetermined region on the inner peripheral edge of the shock absorbing long hole 4, and the contact portion is crushed. As a result, energy is absorbed during the secondary collision. A region where the inner peripheral edge of the shock absorbing long hole 4 is crushed by the bolt shaft 61 is referred to as a crushed side portion 41.

  There is also a configuration in which a protruding plate piece 43 is provided between the telescopic elongated hole 3 and the shock absorbing elongated hole 4 to be bent by a collision with the bolt shaft 61 at the time of a secondary collision (see FIG. 9). The protruding plate piece 43 has a shaft shape or a rod shape, and is formed in a protruding shape from one end side to the other end side in the vertical direction (direction perpendicular to the longitudinal direction) of the impact absorbing long hole 4.

  The protruding plate piece 43 is crushed by the pressing force at the time of the collision of the bolt shaft 61 at the time of the secondary collision, and the collapsed state is a state in which the protruding plate piece 43 falls from its root portion. When the bolt shaft 61 tilts the protruding plate piece 43, the first-half impact at the time of the secondary collision is absorbed. In addition, on the rear side of the portion where the protruding plate piece 43 of the shock absorbing long hole 4 is formed, a housing portion 42 for storing the protruding plate piece 43 when the protruding plate piece 43 falls is formed. .

  A recess 24 is formed in at least one of the hanger bracket A and the fixed bracket 5. More specifically, the recessed portion 24 is formed by forming the thin portion 23 on at least one of the side plate portion 21 where the shock absorbing long hole 4 of the hanger bracket A is formed or the fixed side portion 51 of the fixed bracket 1. Is done.

  Further, the recess 24 is formed so as to be positioned on the contact surface side between the fixed side portion 51 of the fixed bracket 5 and the side plate portion 21 of the hanger bracket A. There are three embodiments of the formation part of the recessed part 24 formed by the thin part 23 formed in at least one of the hanger bracket A or the fixed bracket 5.

  1st Embodiment in the formation location of the recessed part 24 forms the recessed part 24 by forming the thin part 23 in the side-plate part 21 of the hanger bracket A [FIG.1 (C), FIG.2, FIG.3 etc. reference〕. In 2nd Embodiment, the recessed part 24 is formed by forming the thin part 23 in the fixed side part 51 of the fixed bracket 5 [refer FIG. 8 (A)].

  Moreover, in 3rd Embodiment, the recessed part 24 is formed by forming the thin part 23 in both the side-plate part 21 of the hanger bracket A, and the fixed side part 51 of the fixed bracket 5 [FIG. )reference〕. Further, as described above, the recessed portion 24 is formed on at least one of the fixed side portion 51 of the fixed bracket 5 and the side plate portion 21 of the hanger bracket A. In any case, the fixed side portion 51 and the side plate portion 21 are formed. It is formed on the surfaces that contact each other. The contact surface side of the side plate portion 21 of the hanger bracket A is a surface on the outer side in the width direction of the hanger bracket A, and the contact surface side of the fixed side portion 51 of the fixed bracket 5 is the surface of the fixed bracket 5. It becomes the surface on the inner side in the width direction.

  Hereinafter, 1st Embodiment of the formation location in the thin part 23 and the recessed part 24 is described. In the first embodiment where the thin portion 23 and the recessed portion 24 are formed, the thin portion 23 is formed on the inner peripheral edge of the shock absorbing long hole 4 and on the side plate portion 21 around the collapsed side portion 41. Is. The thin portion 23 is formed thinner than the thickness of other portions of the side plate portion 21 (see FIGS. 2B and 2C).

  The thin wall portion 23 is thinned so as to be stepped with respect to other portions of the side plate portion 21, and the region is set with the stepped portion, that is, the outer periphery of the thin wall portion 23 as a boundary. The shape of the formation area of the thin portion 23 is formed in a substantially rectangular shape. The thin portion 23 has the same thickness at any location in the formation region. Further, the corner angle between the surface of the thin portion 23 and the stepped portion 21a is a right angle (see FIG. 2C) or formed in an arc shape (see FIG. 5A).

  Further, the thin-walled portion 23 is formed not only to have a stepped shape but also to gradually increase the thickness as the distance from the position set at the peripheral edge of the shock absorbing long hole 4 and the crushable side portion 41 in that region is increased. Some types exist. In this type, the cross section of the thin portion 23 is formed as a straight slope (see FIG. 5B).

  Moreover, the cross section of the said thin part 23 may be formed as an arcuate slope (refer FIG.5 (C)). As described above, the crushed side portion 41 is a portion to which the bolt shaft 61 is abutted and crushed during the shock absorbing operation, and there are various shock absorbing long holes 4 depending on the position where the crushed side portion 41 is set. There are embodiments of the shape.

  Therefore, the shock absorbing long hole 4 has various types of configurations of the collapsed side portion 41 and the thin portion 23 formed in the periphery thereof. In the first type, the upper side 4 a is provided as a side inclined downward from the front side toward the rear side, and the upper side 4 a is used as the crushable side part 41. The thin portion 23 is formed along the inclined crushing side portion 41 and inclined downward from the front side toward the rear side (see FIG. 2A).

  The second type of the shock absorbing long hole 4 is such that the lower side 4b is provided as a side inclined upward from the front side toward the rear side, and the lower side 4b is used as a crushing side part 41. Like the side portion 41, the side portion 41 is inclined upward from the front side toward the rear side (see FIG. 3A). In the third type of the shock absorbing long hole 4, the upper side 4a is inclined downward from the front side to the rear side, the lower side 4b is a side inclined upward from the front side to the rear side, and the upper side 4a In addition, a crushing side portion 41 is provided on each of the lower sides 4b, and thin portions 23 and 23 are provided on both the crushing side portions 41 and 41 (see FIG. 3B). In the third type, both thin portions 23 and 23 are gradually narrowed from the front side toward the rear side.

  Further, the fourth type of the shock absorbing long hole 4 has a substantially rectangular shape in which the upper side 4a and the lower side 4b are parallel. Specifically, a rectangular groove-like hole having a width dimension smaller than that of the telescopic elongated hole 3 is formed, and the upper side 4a thereof is used as the collapsed side portion 41. The thin-walled portion 23 is formed around the crushing side portion 41 (see FIG. 3C).

  The fifth type of the shock absorbing long hole 4 is substantially rectangular like the fourth type described above, and its lower side 4b is a crushed side portion 41, and a thin wall portion is formed along the crushed side portion 41 in the periphery thereof. 23 (see FIG. 3D). Further, the sixth type of the shock absorbing long hole 4 is substantially rectangular like the fourth type and the fifth type, and the interval between the upper side 4a and the lower side 4b is set smaller than the diameter of the bolt shaft 61, The upper side 4a and the lower side 4 are used as the collapsed side parts 41, respectively, and the thin parts 23 and 23 are formed on both the collapsed side parts 41 and 41 (see FIG. 3E).

  The thickness t of the thin portion 23 can be set as appropriate, and can be made extremely thin (see FIG. 6A) or thicker than the thickness of the side plate portion 21 (see FIG. 6). (See (B)). Further, when the shape of the region where the thin portion 23 is formed is rectangular, the height h of the thin portion 23 may be reduced (see FIG. 6A) or may be increased [FIG. See B)].

  As described above, the thin portion 23 is formed around the side set as the collapsed side portion 41 in the shock absorbing long hole 4 and along the collapsed side portion 41. And in 1st Embodiment in the formation location of the thin part 23, since the thin part 23 is formed in the step shape in the side-plate part 21, a hollow is formed in the area | region equivalent to the thin part 23, and this hollow is made into a recessed part. 24. That is, the recessed portion 24 is formed by forming the thin portion 23, and is present on the side plate portion 21 at the front and back positions.

  The recessed portion 24 serves to accommodate the protruding portion J of the meat that is generated when the crushing side portion 41 of the shock absorbing long hole 4 is crushed during the secondary collision. The size of the recess 24 is determined by the thickness of the thin portion 23. Moreover, the recessed part 24 formed in the side-plate part 21 becomes a site | part which faces the fixed side part 51 of the fixing bracket 5 mentioned later. That is, the recessed portion 24 of the side plate portion 21 is a side surface that comes into contact with the fixed side portion 51 of the fixed bracket 5.

  Further, the thin portion 23 in the first type to the third type of the shock absorbing long hole 4 is formed so that the vertical dimension on the front side is the smallest and the vertical dimension is increased toward the rear side. (See FIG. 7). At this time, the shock absorbing long hole 4 is a crushable side portion 41 in which the upper side 4a or the lower side 4b or both the upper side 4a and the lower side 4b are inclined.

  Next, 2nd Embodiment of the formation location in the thin part 23 and the recessed part 24 is described. In the second embodiment, the thin portion 23 is formed on the fixed side portion 51 of the fixed bracket 5. Here, when the thin portion 23 is formed on the fixed side portion 51, the formed recessed portion 24 is a position corresponding to the formation position of the crushing side portion 41 of the shock absorbing long hole 4 of the hanger bracket A, Moreover, it is necessary to be in a state of covering the vicinity of the crushed side portion 41. That is, the recessed part 24 exists in the position which can accommodate the protrusion part J produced by the crushing side part 41 being crushed by the bolt shaft 61 at the time of a secondary collision. Therefore, as described above, the recessed portion 24 is located on the inner surface side of the fixed side portion 51 and in the vicinity of the crushing side portion 41.

  Next, 3rd Embodiment of the formation location in the thin part 23 and the recessed part 24 is described. In the third embodiment, thin portions 23 are formed on both the side plate portion 21 of the hanger bracket A and the fixed side portion 51 of the fixed bracket 5. And the two recessed parts 24 and 24 formed of both the thin parts 23 in both the side-plate part 21 and the fixed side part 51 are comprised so that it may oppose.

  About the 2nd Embodiment and 3rd Embodiment of the formation location in the thin part 23 and the recessed part 24 which were described above, it is the 1st type in the to-be-crushed side part 41 of the shock absorption long hole 4 similarly to the 1st Embodiment. To the sixth type. Then, the protruding portion J generated by the crushing side portion 41 at the time of the secondary collision being crushed by the bolt shaft 61 can be accommodated in the recessed portion 24. Thereby, it can prevent that the protrusion part J and the stationary side part 51 interfere, and can maintain the optimal energy absorption load set with simple structure.

  Next, assembling of the constituent members of the present invention will be described by taking as an example the first embodiment of the formation portion in the thin portion 23 and the recessed portion 24 described above. Both side plates 21, 21 of the hanger bracket A are sandwiched between the fixed side portions 51, 51 of the fixed bracket 5, the adjustment holes 53, 53 of the fixed side portions 51, 51, and the telescopic of the hanger bracket A The bolt shaft 61 of the fastening tool 6 passes through the long hole 3 and is mounted by a nut 64 together with the lock lever portion 62 and the fastening cam 63 [see FIG. 1 (C)]. The fastening cam 63 is pressed on the fixed side portion by the turning operation of the lock lever portion 62, and both are fastened by the fastening tool 6. As a result, the column pipe 1 is locked (fixed) to the fixed bracket 5 in the axial direction together with the hanger bracket A.

  The hanger bracket A is disposed between the fixed side portions 51 and 51 of the fixed bracket 5. At this time, the recessed portion 24 located in the formation region of the thin portion 23 of the side plate portion 21 of the hanger bracket A is located on the contact side with the fixed side portion 51 of the fixed bracket 5. That is, the recessed portion 24 faces the fixed side portion 51.

  Next, the energy absorption operation at the time of the secondary collision in the present invention will be described. When the driver collides with the steering wheel (handle) 92 during the secondary collision, the collision force causes the hanger bracket A together with the column pipe 1 to exceed the tightening force between the fixed bracket 5 and the fastener 6 and move forward. The bolt shaft 61 reaches the longitudinal end of the shock absorbing long hole 4 (see FIGS. 4A and 4B).

  Then, the bolt shaft 61 of the fastener 6 moves relatively from the area of the telescopic elongated hole 3 to the area of the shock absorbing elongated hole 4, and the bolt shaft 61 begins to crush the crushed side portion 41 [FIG. ), See (D)]. The crushing side portion 41 is crushed when the collision energy is absorbed by this crushing, and a protruding portion J of meat is generated. Here, the protruding portion J generated on the fixed side portion 51 side is accommodated in the recessed portion 24. Therefore, the protruding portion J does not come into contact with the fixed side portion 51 (see FIGS. 4E and 4F).

  Therefore, stable energy absorption can be performed without the protruding portion J and the fixed side portion 51 interfering with each other (see FIG. 4). In addition, since it is not necessary to consider the frictional load caused by the interference between the protruding portion J of the meat generated by crushing and the fixed side portion 51, the optimum energy absorption load can be easily set.

  Furthermore, as described above, in the first type to the third type of the shock absorbing long hole 4, the crushed side portion 41 is inclined. Therefore, when the crushed side portion 41 is crushed by the bolt shaft 61, From the front side toward the rear side, the protruding portion J of the meat due to crushing gradually increases so as to expand.

  That is, in the crushed side portion 41 in the first type to the third type, the resistance force in the energy absorbing operation at the time of the secondary collision increases as it goes to the rear side of the shock absorbing long hole 4. There is also an embodiment in which the thin portion 23 is formed so that the dimension in the vertical direction increases from the front side to the rear side as described above with respect to the first to third types of impact absorbing long holes 4 ( (See FIG. 7).

  By the thin portion 23 of the above embodiment, the size of the protruding portion J of the crushed side portion 41 increases toward the rear side. However, as with the thin portion 23, the portion closer to the rear side of the recessed portion 24 is vertically moved. By increasing in the direction, even the protruding portion J that has increased in expansion can be completely accommodated in the recessed portion 24, and interference with the fixed side portion 51 of the fixed bracket 5 can be prevented. The thin-walled portion 23 in this embodiment does not simply increase the vertical dimension, but increases only the necessary portion. Further, by appropriately changing the thickness dimension t and the height dimension h of the thin portion 23, the crushing load of the crushing side portion 41 at the time of the secondary collision can be easily changed.

  The hanger bracket A is mainly formed by pressing. At this time, when punching from the metal plate, the thin portion 23 of the side plate portion 21 together with the telescopic long holes 3 and the shock absorbing long holes 4 can be simultaneously formed by pressing. At the same time, the recess 24 is also formed. In this way, the recessed portion 24 that accommodates the protruding portion J can be easily formed. Further, the recess 24 can be formed by forming the thin portion 23 on the side plate portion 21 or the fixed side portion 51 by cutting.

DESCRIPTION OF SYMBOLS 1 ... Column pipe, A ... Hanger bracket, 21 ... Side plate part, 23 ... Thin part,
24 ... dent, 3 ... telescopic slot, 4 ... shock absorbing slot, 41 ... crushed edge,
5 ... Fixing bracket, 51 ... Fixed side, 6 ... Fastener, 61 ... Bolt shaft.

Claims (7)

  A column pipe, a hanger bracket fixed to the column pipe, a fixed bracket having fixed side portions that sandwich both sides of the hanger bracket in the width direction, and the fixed bracket and the hanger bracket are tightened and released. The hanger bracket includes side plate portions on both sides in the width direction, and the telescopic elongated hole into which the bolt shaft can be inserted from the front side toward the rear side. A shock absorbing oblong hole having a crushing side portion that is crushed by the bolt shaft during relative movement between the bolt side and the bolt shaft, and is fixed around the crushing side portion and along the crushing side portion. A thin part is formed on at least one of the side part or the side plate part, and the recessed part formed by the thin part is located on the contact surface side of the fixed side part and the side plate part. Steering apparatus according to symptoms.   The steering apparatus according to claim 1, wherein the recess is formed in the side plate.   The steering apparatus according to claim 1, wherein the recess is formed on the fixed side part.   The steering apparatus according to claim 1, wherein the recess is formed in the side plate and the fixed side part.   5. The steering device according to claim 1, wherein all of the thin portions have the same thickness. 6.   5. The steering device according to claim 1, wherein the thin portion is formed so that the thickness increases as the distance from the peripheral edge of the shock absorbing elongated hole increases. Steering device. The steering device according to any one of claims 1, 2, 3, 4, 5, and 6, wherein the crushing side portion of the shock absorbing long hole narrows in the vertical direction from the front side toward the rear side. In addition, the thin-walled portion around the collapsed side portion is formed so as to gradually expand in the vertical direction from the front side to the rear side of the shock absorbing long hole. Steering device.

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