JP6092703B2 - Wheel core - Google Patents

Description

  The present invention relates to a wheel mandrel constituting a steering wheel installed in a driver's seat of a vehicle.

  The steering wheel installed in the vehicle driver's seat is covered with a cushion body (for example, foam material and skin) based on a metal core, and is provided with a horn switch unit, an airbag unit, and the like. .

  At this time, for the mandrel of the steering wheel, an annular rim core for gripping and rotating by the driver, and a boss core disposed at the radial center of the rim core And a spoke core metal that connects the rim core metal core and the boss core metal core in the radial direction.

  The rim core, the spoke core and the boss core are fixed by welding or using a fixing member such as a bolt or rivet. At this time, in order to perform welding or using a fixing member, for example, the welded part and the fixed part of the rim cored bar and the spoke cored bar need to be flat, and in order to ensure strength, the rim part The cored bar is provided with a double-structured parallel flange, and the end of the spoked cored bar is inserted between the flanges (for example, see Patent Document 1).

JP-A-10-119791

  In the above prior art, when the spoke portion is used as a reference, a parallel flange is provided to ensure strength in the rim outer circumferential direction (rim radial direction) and the rim vertical direction (direction along the axis), and the spoke is interposed between them. Since the ends of the parts are inserted and riveted, the connection state between them depends only on the rivets.

  Therefore, for example, when a rivet falls off due to an unexpected external force applied to the coupling part during the transport process or work process for covering the outer periphery of the core metal of the steering wheel, etc. There was a problem that it was easily released.

  Moreover, the cross-sectional shape of the cored bar becomes linear, and in order to obtain a substantially circular cross-sectional shape as a steering handle, there has been a problem that the molding process at the time of covering with the cushion body becomes complicated.

  An object of the present invention is to provide a wheel mandrel that can easily secure a coupling state in a state where the mandrel is assembled.

  In order to achieve the above object, a wheel metal core according to a first aspect of the present invention includes a rim core metal formed in an annular shape by a substantially C-shaped press part, and a boss disposed on a central axis of the rim core metal. A wheel core metal comprising: a metal core, and a plurality of spoke metal cores that connect the rim metal core and the boss metal core, wherein the first spoke metal core of the plurality of spoke metal cores The gold is characterized in that a first grip connecting member for integrally gripping both ends of the substantially C-shape of the press part by a method other than welding is provided integrally on a radially outer side portion. .

  According to the wheel metal core of the first invention, the rim core metal is a substantially C-shaped ring. Among the plurality of spoke cores connecting the rim core and the boss core, the first spoke core is a rim core for connecting the C-shaped tip ends other than welding. The first gripping connecting member grips the gripping member straddling between the two tip portions from the radially outer side of the rim cored bar.

  As a result, the first spoke cored bar can be fitted into both ends of the rim cored bar. Accordingly, after the first spoke core and the rim core are joined by a fixing means such as a bolt or a rivet, the rim core in the direction in which the two tips are separated even if the fixing means is removed by an unexpected external force. While suppressing that a gold | metal | money spreads by elastic return force, the state which assembled | attached the metal core can be maintained and the coupling | bonding aspect of a rim | limb part core metal and a 1st spoke part metal core can be ensured easily.

Moreover, wheel core metal of the first invention, the second spoke core of the previous SL plurality of spoke cores are provided in a portion other than the both end portion of the substantially C-shape of the pressed part It is characterized by integrally including a tongue portion inserted through the through-hole.

Thereby , a through-hole is formed in the predetermined position of a rim | limb part metal core, and it can position easily by inserting the tongue part of a 2nd spoke part metal core in this through-hole.

A wheel metal core according to a second aspect of the present invention is the wheel metal core according to the first aspect , further comprising a second grip connecting member for gripping a portion of the rim core metal where the through hole is formed, The rim cored bar is gripped from a radially outer peripheral portion by the second gripping connecting member in a state where the tongue portion of the two-spoke cored bar is inserted into the through hole.

According to the wheel core metal of the second invention , the rim core metal is disposed on the radially outer peripheral portion with the second grip connecting member in a state where the tongue portion of the second spoke core metal is inserted into the through hole of the rim core metal. It becomes possible to easily connect the second spoke cored bar and the rim cored bar.

  According to the present invention, it is possible to easily ensure the coupling state in a state where the core bar is assembled.

BRIEF DESCRIPTION OF THE DRAWINGS It is the perspective view of the assembly state of the wheel core metal which shows the wheel core metal which concerns on one embodiment of this invention. BRIEF DESCRIPTION OF THE DRAWINGS It is the front view of the assembly | attachment state of the wheel core metal which showed the wheel core metal which concerns on one embodiment of this invention, and abbreviate | omitted one part. 1 is a perspective view of a rim cored bar, showing a wheel cored bar according to an embodiment of the present invention. It is the front view of the principal part which showed the wheel metal core which concerns on one embodiment of this invention, and expanded the front-end | tip part vicinity of a rim | limb part metal core. It is the perspective view of the principal part which showed the wheel core metal which concerns on one embodiment of this invention, and expanded the position corresponding to the both ends of the 2nd spoke part core metal of a rim | limb part core metal. The wheel metal core which concerns on one embodiment of this invention is shown, and it is a front view of a boss | hub part metal core and a 2nd spoke metal core. It is a perspective view of the 1st spoke metal core which shows the wheel metal core concerning one embodiment of the present invention. FIG. 3 is an enlarged perspective view of a main part of the first spoke core bar, showing the wheel core bar according to the embodiment of the present invention. It is a perspective view of the bracket as a 2nd holding | grip connection member which shows the wheel core metal which concerns on one embodiment of this invention. It is the perspective view of the principal part seen from the rim inner side in the state which shows the wheel metal core which concerns on one embodiment of this invention, and attaches the 2nd spoke metal core to the rim | limb metal core. It is the perspective view of the principal part seen from the rim outer side of the state which shows the wheel metal core which concerns on one embodiment of this invention, and attaches the 2nd spoke metal core to a rim | limb part metal core. It is the perspective view of the principal part seen from the rim inner side in the state which shows the wheel metal core which concerns on one embodiment of this invention, and attaches a bracket to a rim | limb metal core. It is the perspective view of the principal part seen from the rim inner side in the state which showed the wheel metal core which concerns on one embodiment of this invention, and attached the 2nd spoke metal core to the rim | limb metal core. It is a perspective view of the important section seen from the rim outer side in the state where the wheel core metal concerning one embodiment of the present invention was shown and the 2nd spoke metal core was attached to the rim core metal. It is a perspective view of the important section seen from the rim outside in the state where the wheel core metal concerning one embodiment of the present invention is shown and the 1st spoke metal core is attached to the rim core metal. It is the perspective view of the principal part seen from the rim inner side in the state which showed the wheel metal core which concerns on one embodiment of this invention, and attached the 2nd spoke metal core to the rim | limb metal core. It is a perspective view of the important section seen from the rim outer side in the state where the wheel core metal concerning one embodiment of the present invention was shown and the 2nd spoke metal core was attached to the rim core metal. It is the perspective view of the principal part seen from the rim outer side of the state which shows the wheel metal core which concerns on one embodiment of this invention, and attaches a boss | hub to a boss | hub part metal core. It is a perspective view of the principal part seen from the rim outer side of the boss engagement state which shows the wheel metal core concerning one embodiment of the present invention, and attaches a boss to a boss part metal core. It is the perspective view of the principal part seen from the rim outer side of the state which showed the wheel metal core which concerns on one embodiment of this invention, and attached the boss | hub to the boss | hub part metal core. It is the perspective view of the principal part seen from the rim outer side of the state which shows the wheel metal core which concerns on one embodiment of this invention, and attaches a holder to a wheel metal core.

  Hereinafter, a first embodiment of the present invention will be described with reference to the drawings.

  FIG. 1 shows a wheel metal core according to an embodiment of the present invention, and is a perspective view of the assembled state of the wheel metal core. FIG. 2 shows a wheel metal core according to an embodiment of the present invention, and a part thereof is omitted. It is a front view of the assembly | attachment state of the made wheel core metal.

  1 and 2, a wheel core metal 10 includes a rim core metal 20 formed in an annular shape by a substantially C-shaped press part, and a boss core metal core disposed on the central axis of the rim core metal 20. 30, the first spoke core metal 40 and the second spoke core metal 50 that connect the rim core metal 20 and the boss core metal 30, and both ends of the second spoke core metal 50 to the rim core metal 20. And a bracket 60 for fixing. The second spoke core metal 50 is integrally provided with a boss core metal 30 and has a bilaterally symmetric structure with the boss core metal 30 as a center.

  As shown in FIG. 3, the rim cored bar 20 is formed by bending a shaft in an annular shape (specifically, in the above-described substantially C shape). Further, the outer peripheral surface 20a of the rim cored bar 20 is a flat surface. The front end portions 22 and 24 of the rim cored bar 20 are opposed to each other, and the outer appearance of the rim cored bar 20 is a perfect circle or a substantially oval in plan view so as to define the outer shape of the steering wheel. ing.

  For example, as shown in FIG. 4, in the vicinity of the end portions of the rim cored bar 20, the outer peripheral surface 20 a of one end portion 22 has a perfect mounting hole 22 a for riveting. Is formed. Further, a mounting hole 24a for riveting having a long diameter along the circumferential direction is formed on the outer peripheral surface 20a of the other tip portion 24. The mounting holes 22a and 24a are each one place in the present embodiment, but may be a plurality of places. At this time, the mounting hole 24a can be dealt with by increasing the length of the diameter along the circumferential direction.

  As shown in FIG. 5, along the circumferential direction, a position passing through the center of the rim cored bar 20 and perpendicular to both end portions 22, 24, that is, a position corresponding to both ends of the second spoke cored bar 50, is shown. A long through-hole rectangular through hole 20b and a mounting hole 20c for attaching a rivet are formed.

  As shown in FIG. 6, the boss core metal 30 has a flat predetermined range including the rotation center of the rim core metal 20, and a boss hole 32 and a plurality of boss mounting holes 34 around the boss hole 32. Is formed.

  One end of the first spoke core metal 40 is a flat plate-like support portion 42 supported by the boss core metal 30, and the other end extends toward both end portions 22 and 24 of the rim core metal 20. . As shown in FIG. 7, the first spoke portion cored bar 40 is formed with an airbag mounting portion 44 for mounting an airbag device (not shown) on one end side. The configuration of the airbag mounting portion 44 is a known one.

  A first grip connecting member 46 is integrally provided on the other end side of the first spoke portion 40. Mounting holes 46 a and 46 b are formed in the first gripping connection member 46 so as to coincide with the mounting holes 22 a and 24 a of the rim cored bar 20. Further, as shown in FIG. 2, the support portion 42 is fixed by welding 36 on the back surface side of the boss core metal 30.

  The second spoke cored bar 50 extends linearly toward the rim cored bar 20 around the boss hole 32 of the bossed cored bar 30, and as shown in FIG. The two-spoke core 50 has a substantially T-shape in plan view.

  As shown in FIG. 8, tongues 52 are formed at both ends of the second spoke core metal 50 so as to rise in a cut-and-raised shape and are parallel to the boss core metal 30. In addition, reinforcing flanges 54 including the boss core metal 30 are formed on both edge portions extending in the extending direction of the second spoke core metal 50. An airbag mounting portion 56 for mounting an airbag device (not shown) is formed near the center of the second spoke core metal 50. The configuration of the airbag mounting portion 56 is a known one.

  As shown in FIG. 9, the bracket 60 includes a support portion 62 that supports the back surface of both ends of the second spoke core metal 50 and a grip portion 64 that grips the rim core metal 20 from the radially outer side. It is prepared as one.

  A through hole 64a and an attachment hole 64b are formed in the grip portion 64 so as to coincide with the through hole 20b and the attachment hole 20c. The mounting hole 20b is formed on one side of the through hole 20b, but the gripping portion 64 is illustrated with mounting holes 64b formed on both sides of the through hole 64a. Therefore, the mounting holes 20c may be formed in the rim cored bar 20 on both sides of the through hole 20b. However, even if the mounting hole 20c is formed in one or both of the through holes 20b, if the mounting holes 64b of the gripping portion 64 are formed on both sides of the through holes 64a, the bracket 60 is connected to the second spoke core. The gold 50 can be shared by one side and the other side.

  The first gripping connecting member 46 is formed by bending a cross-sectional shape for gripping the rim core metal 20 from the radially outer peripheral side, that is, a portion excluding a flat portion of the outer peripheral surface 20a in an arc shape. Thereby, the fitting state of the rim cored bar 20 can be strengthened by the gripping part 64.

  In the above configuration, the wheel core 10 is assembled to the rim core 20 in the order of the second spoke core 50, the bracket 60 as the second grip connecting member, and the first spoke core 40. .

  Specifically, as shown in FIGS. 10 and 11, the tongue 52 of the second spoke core 50 is inserted into the through hole 20 b of the rim core 20.

  Next, as shown in FIG. 12, the bracket 60 is inserted into the rim cored bar 20 from the outside in the radial direction, and as shown in FIGS. 13 and 14, the gripping portion 64 while aligning the tongue portion 52 with the through hole 64a. Then, the rim cored bar 20 is gripped.

  In this state, the mounting hole 20c and the mounting hole 64b are aligned and fastened by the rivet 70, and at the same time, the bracket 60 and the second spoke core metal 50 are fixed by welding 58.

  Next, the first spoke core metal 20 is mounted between the boss core metal 30 and the rim core metal 20. As shown in FIG. 15, the first spoke cored bar 20 is inserted into the rim cored bar 20 from the outside in the radial direction, and the mounting holes 46a, 46b are aligned with the mounting holes 22a, 24a. The rim cored bar 20 is gripped by the first gripping connecting member 46.

  In this state, the mounting holes 46a, 46b are made to coincide with the mounting holes 22a, 24a, the diameter of the rim cored bar 20 is adjusted, and as shown in FIGS. 42 and the boss core 30 are fixed by welding 36.

  As shown in FIGS. 18 to 20, a boss 74 for connecting the steering shaft is attached to the boss core 30.

  The boss 74 has a substantially cylindrical shape, and the through hole 76 coincides with the boss hole 32. The boss 74 has four engaging claws 78 on the outer side than the through hole 76. 19, the engaging claw 78 is inserted into the boss mounting hole 34 as shown in FIG. 19, and the front end of the engaging claw 78 is expanded and locked to the boss core 30 as shown in FIG. Thus, it can be attached to the boss core 30.

  In addition, as shown in FIG. 21, the steering core 10 assembled in this way may be provided with a separate holder 80 on the outer periphery of the rim cored bar 20.

  Thus, in the wheel metal core 10 of the present invention, the first spoke metal core 40 holds the substantially C-shaped tip portions 22 and 24 of the press part while connecting them by a technique other than welding. The 1st holding | grip connection member 46 for this is integrally provided in the radial direction outer peripheral side part.

  The second spoke cored bar 50 is integrally provided with a tongue 52 that is inserted into a through-hole 20b provided in a portion other than the both C-shaped distal ends 22 and 24 of the pressed part. .

  Furthermore, a bracket 60 is provided as a second grip connecting member for gripping a portion of the rim cored bar 20 where the through hole 20b is formed, and the tongue 52 of the second spoke cored bar 50 is inserted into the through hole 20b. In this state, the bracket 60 is mounted so as to be gripped from the radially outer peripheral portion of the rim cored bar 20.

  One end of the rim core bar 20 is formed with one or more mounting holes 22a for riveting, and the other end is for riveting with a long diameter along the circumferential direction. One or more through holes 24a are formed, and the first gripping connection member 46 is formed with two or more mounting holes 46a and 46b for riveting that coincide with the mounting holes 22a and 24a. The rim cored bar 20 is coupled to the first spoke cored bar 40 by coupling with the rivets 72 in a state where the mounting holes 22a, 24a and the respective mounting holes 46a, 46b of the first gripping connecting member 46 are matched. Can do.

  In addition to those already described above, the methods according to the above-described embodiments and modifications may be used in appropriate combination.

  In addition, although not illustrated one by one, the present invention is implemented with various modifications within a range not departing from the gist thereof.

20 rim cored bar 22 distal end 24 distal end 30 boss cored bar 40 first spoke cored bar 46 first grip connecting member 50 second spoke cored bar 60 bracket (second gripped connecting member)

Claims (2)

A rim cored bar configured in an annular shape by a substantially C-shaped press part;
A boss core disposed on the central axis of the rim core;
A plurality of spoke cores connecting the rim core and the boss core;
In the wheel mandrel with
Of the plurality of spoke cores, the first spoke core is
A first grip connecting member for integrally gripping both ends of the substantially C-shaped press part by a technique other than welding is integrally provided on the radially outer peripheral side part,
Of the plurality of spoke cores, the second spoke core is
Wherein the substantially C-shaped pressed parts are inserted into the through hole provided in a portion other than both tip wheel core metal, characterized in that it comprises integrally a tongue. The wheel mandrel according to claim 1 ,
A second grip connecting member for gripping the portion of the rim cored bar in which the through hole is formed;
The wheel core metal, wherein the second grip connecting member is gripped from a radially outer peripheral portion of the rim core metal while the tongue portion of the second spoke core metal is inserted into the through hole. .

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