Summary of the invention
Problems to be solved by the invention
But in the arbor of above-mentioned steering wheel, the engaging portion of split ring vehicle front side and rear side two
The inner circumferential side of direction radial direction and the two directions of the upside of vehicle are open.Therefore, in the combination of the front side of vehicle and rear side
In operation, for example, if cannot the spring of the rear side of vehicle act in a manner of popping up both ends properly into
Row positioning and pressing, then cannot be combined operation, and become operating efficiency reduction will be because.
The purpose of the present invention is to provide a kind of arbors of steering wheel, can be improved operation of the split ring portion in conjunction with operation when
Intensity of the efficiency without damaging rim part.
Solution for solving the problem
To achieve the goals above, a kind of arbor of steering wheel made of iron, by making circular rim part, configuration in institute
It states the hub portion in the radial center portion of rim part and connects the rim part radially and the spoke portion of the hub portion is mutual
In conjunction with and formed, the arbor of the steering wheel made of iron is characterized in that, the rim part is by making the of substantially semicircular ring shape
The circumferential both ends of second split ring of one split ring and substantially semicircular ring shape combination overlapping one another is constituted,
In, first split ring is set to the front side of the vehicle and first engaging portion at both ends is at least made to be shaped generally as "U" word
Tee section, second split ring are set to the rear side of the vehicle and are at least shaped generally as second engaging portion at both ends
" I " shaped sections, also, make first split ring, the spoke portion, described second from radially outer peripheral side towards inner circumferential side
In the state that split ring is overlapped in a predefined order, by penetrating through the first split ring, spoke portion and the second split ring radially
Bonded block these first split rings, spoke portion and the second split ring are be combined with each other.
Rim part, spoke portion and hub portion are respectively constituted in the arbor of the steering wheel of first invention, and rim part is divided into
Split ring circumferentially, and be made of these combinations.A variety of demands such as basis applicable size, form of vehicle as a result, this
In a little split rings, the split ring for not needing the side of very big intensity can be configured to smaller intensity, need bigger intensity
The split ring of side can be configured to biggish intensity.This is as a result, it is possible to be avoided such as being formed as on the complete cycle of rim part
The part that the case where same intensity did not needed very big intensity originally like that also vainly ensures biggish intensity.Therefore, can
Realize the reduction of weight and the reduction of manufacturing cost.
In addition, the first split ring set on the substantially semicircular ring shape of the front side of vehicle makes its both ends in rim part
First engaging portion is shaped generally as "U" shaped sections, set on the second split ring of the substantially semicircular ring shape of the rear side of vehicle
Second engaging portion at its both ends is set to be shaped generally as " I " shaped sections.
At this point, the first split ring makes the opening direction of the substantially "U" shaped sections of the first engaging portion for example towards radial direction
Inner circumferential side or outside are open.On the other hand, the force direction that the second split ring forms it is opened to first engaging portion
Contrary direction force, that is, if the first engaging portion is opened to radially inner side, exert a force towards radial outside, if the first knot
Conjunction portion is opened to radial outside, then is exerted a force towards radially inner side.By the force, the second engaging portion of generally " i " shaped sections
It is chimeric by the spring effect nature of elasticity with the first engaging portion of substantially "U" shaped sections, make circumferential both ends each other
The combination of overlapping has anticreep effect, and can properly ensure to position and press, and can be improved operating efficiency.
Moreover, making the first split ring, spoke portion, the second split ring with scheduled suitable from radially outer peripheral side towards inner circumferential side
In the state of sequence overlapping, by the bonded block that penetrates through radially by these first split rings, spoke portion and the second split ring
It is combined with each other, so as to ensure light-weighted while readily insuring that intensity.
At this point, as described above, the opening direction of the substantially "U" shaped sections of the first engaging portion be it is unidirectional, especially lead to
Cross it is open towards radial inner circumferential side or peripheral side, in the bonded block by penetrating through radially by the first split ring, spoke
When item portion and the second split ring be combined with each other, the case where releasing the overlap condition of these components will not occur.
Second invention is characterized in that, in above-mentioned first invention, the spoke portion have by first engaging portion and
The third engaging portion of the second engaging portion clamping and the substantially "U" shaped sections for bonded block perforation.
According to the arbor of the steering wheel of the second invention, spoke portion has the third engaging portion of substantially "U" shaped sections,
It is penetrated through radially in the state of first engaging portion and the clamping of the second engaging portion for bonded block.Therefore, if making as first
The opening direction of the substantially "U" font of the cross sectional shape of engaging portion and substantially "U" font as third cross sectional shape are opened
It puts that direction is consistent, and makes third cross sectional shape less than the cross sectional shape of the first engaging portion, keep the cross sectional shape of the second engaging portion small
Cross sectional shape in third engaging portion can then be thinned when being overlapped the first split ring, spoke portion, the second split ring radially
Thickness, additionally it is possible to be housed in the first engaging portion.
The first split ring, spoke portion, the second split ring is set to be overlapped and combine radially using bonded block as a result,
When, it can further make the second engaging portion and third engaging portion be difficult to fall off from the first engaging portion, operation can be further increased
Property.
Third invention is characterized in that, in above-mentioned first invention, first binding site is in radially outer peripheral side and court
It is opened to radially inner circumference side, the spoke portion has third engaging portion, and the third engaging portion is by first engaging portion and institute
It states the clamping of the second engaging portion and the mode penetrated through radially for the bonded block is big with opening towards radially inner circumference side
"U" shaped sections are caused, the radially inner circumference of second engaging portion and the third engaging portion stresses to fold.
According to the arbor of the steering wheel of third invention, makes the first binding site in radially outer peripheral side and make substantially "U" font
The opening direction in section is open towards radially inner circumference side.In addition, spoke portion has third engaging portion, which has court
The substantially "U" shaped sections opened to radially inner circumference side.In turn, the radially inner circumference of the second engaging portion and third engaging portion stresses
It is folded.Therefore, third engaging portion is passed through in the state of being clamped by the first engaging portion and the second engaging portion for bonded block radially
It is logical.
It is cut as a result, due to the opening direction of the substantially "U" font of the cross sectional shape as the first engaging portion with as third
The opening direction of the substantially "U" font of face shape is consistent, by making section shape of the third cross sectional shape less than the first engaging portion
Shape makes the cross sectional shape of the second engaging portion be less than the cross sectional shape of third engaging portion, and can be thinned makes the first split ring, spoke
Portion, thickness when the second split ring is overlapped radially, can also be accommodated in the first engaging portion.
In addition, making the first split ring, spoke portion, the second split ring be overlapped and combine radially using bonded block
When, it can further make the second engaging portion and third engaging portion be difficult to fall off from the first engaging portion, operation can be further increased
Property.In addition, as bonded block, it is preferable to use screw bolt and nut, primary screw, tapping screw, rivet, various pins etc. are fastenedly connected
Component considers from lightweight and indissoluble viewpoint, has used the riveting of rivet more preferable.
4th invention is characterized in that, in above-mentioned first invention, first engaging portion is than second engaging portion
In conjunction with front end there is the rotation prevention portion more narrowed than the height low land of second engaging portion by circumferential inboard.
In the 4th invention of the application, by having by circumferential inboard than the second knot in the front end than the first engaging portion
The narrowed rotation prevention portion of the height low land in conjunction portion, can be realized rotation stop of second split ring relative to the first split ring.
5th invention is characterized in that, in above-mentioned first invention, the hub portion has: where the front end of steering stem shaft
Wheel bore;And by positioning region, by with the wheel bore it is adjacent in a manner of formed, and described to be determined with positioning region male and female difference
Position portion is mutually clamped with the positioning region, and the positioning region is formed in the wheel hub master of the connection steering stem shaft and the hub portion
The upper surface of body.
6th invention is characterized in that, in above-mentioned first invention, in conjunction with first split ring, the spoke portion, institute
The bonded block of the second split ring is stated using rivet, by first split ring, the spoke portion, second split ring
Being fastenedly connected into cannot decompose.
Invention effect
In accordance with the invention it is possible to improve operating efficiency of the split ring portion in conjunction with operation when without damaging the strong of rim part
Degree.
Specific embodiment
Next, being illustrated referring to arbor of the attached drawing to the steering wheel of first embodiment of the invention.
In FIG. 1 to FIG. 3, the arbor 10 of steering wheel has: circular rim part 20;Configure the radial direction in rim part 20
The hub core 40 of central part;The spoke portion 30 of hub core 40 and rim part 20 is connected radially;And it will configure in hub core 40
The airbag apparatus (not shown) of surface side with inserted mode support be the spring part 60 that can be gone up and down.
Rim part 20 by make the length for having semicircle or more a pair (2) split ring 22,26 circumferential both ends each other
The combination of overlapping is constituted.
Set on vehicle front side split ring 22 for example the diameter of steering wheel be 370mm in the case where, be formed as by
Wall thickness 1.0mm~2.6mm, width 20mm~40mm, length 500mm~700mm plate made of iron bend to semicircle or more
Arc-shaped and the substantially "U" shaped sections for opening the front side joint portion 24 at both ends to radially inner circumference side.
Front side joint portion 24 when seeing center portion in positive round or close to the ellipse or circular arc of positive round from front,
Its end by from center portion it is continuous in a manner of be integrally formed with the circular arc different from the center portion or substantially polygon threadiness
Heteromorphism part 24a.In addition, front side joint portion 24 is being integrally formed by circumferential inboard position than two front ends than heteromorphism part 24a
The narrowed rotation prevention portion 24b of height low land.In addition, being formed with rivet at circumferential the two of heteromorphism part 24a in front side joint portion 24
The hole portion 24c being fastenedly connected.
Be formed as set on the split ring 26 of the rear side of vehicle by wall thickness 1.0mm~4.0mm, width 5mm~15mm, length
The plate made of iron of 500mm~700mm is bent into the arc-shaped of semicircle or more and is at least formed the rear side joint portion 28 at both ends
For the substantially semicircular ring shape of generally " i " shaped sections.At this point, the width of split ring 26 corresponds to the wall thickness of split ring 22 to determine
It is fixed.In addition, constituting rim part 20 by split ring 22,26.In addition, also having compared with the integral piece of tubulose and realizing and be divided
The corresponding densification in part, transport when will not become larger in equal volume this advantage.In addition, in split ring 26, center portion
It is formed with the locking hole 26a of rectangle.In addition, if thickest 2.6mm shape of the heavy wall relative to the split ring 22 of vehicle front side
The thickest 4.0mm of split ring 26 as vehicle rear side can then make for cross sectional shape to be shaped generally as "U" font
The product for the split ring 26 that the product strength of the split ring 22 of shape maintains than cross sectional shape to be shaped generally as to " I " word shape is strong
Degree is high.
Rear side joint portion 28 when seeing center portion in positive round or close to the ellipse or circular arc of positive round from front,
End is integrally formed with the heteromorphism part 28a of the circular arc or substantially polygon threadiness different from the center portion.In addition, in rear side knot
In conjunction portion 28, rivet connecting hole 28b is formed at circumferential the two of heteromorphism part 28a.
In addition, heteromorphism part 24a of the rotation prevention portion 24b in the front end than being combined as rear side joint portion 28 leans on circumferential inboard
Position, than rear side joint portion 28 height low land narrow.
In addition, split ring 26 is made up of it, combined in the state of undergauge with split ring 22 in a manner of diameter expansion.
But it is found that when the rim part of steering wheel has weight (for example, 250g~400g) of certain degree, grasped in rotation
Acting inertial torque when making and be easy to be operated.Here, using aluminium or magnesium as the arbor of the tubulose of material, to
Ensure its weight, then must carry out enlarged (major diameter).In contrast, by the split ring 22 of Formation cross-section "U" font and
The split ring 26 of section " I " font, and spoke portion 30 and hub core 40 are in addition independently formed, so as to be easy to carry out entirety
The adjustment of weight is without enlargement.
Spoke portion 30 in the present embodiment, includes: on the basis of the use state of car body straight trip and along car body right and left
An opposite side spoke 32 to extension and rear spoke 36 from the center of rim part 20 to car body rear that extend from.
Side spoke 32 is integrally formed with hub core 40, is formed in a manner of supporting split ring 22,26 at its both ends oriented
The support engaging portion 34 of the open substantially "U" shaped sections in radially inner circumference side.In addition, side spoke 32 can also be with hub core 40
The iron plate of two panels is used independently.
In the present embodiment, support engaging portion 34 makes the shape of its end to be close to state and store to heteromorphism part 24a's
The degree of radial inside it is consistent with the circumferential shape of heteromorphism part 24a, and by making the both ends of side spoke 32 to turn back
The mode substantially "U" shaped sections that are bent, and are formed as opening to radially inner circumference side (referring to Fig. 7).Support combines as a result,
Portion 34 is chimeric with heteromorphism part 24a is worked as in the inside of heteromorphism part 24a and can store rear side joint portion 28 in inside.Moreover, support
Engaging portion 34 is formed with rivet through hole 34a in Liang Chu.
In addition, split ring 22 constitutes the first split ring in claims, split ring 26 is constituted in claims
Second split ring, front side joint portion 24 (especially heteromorphism part 24a) constitute the first engaging portion in claims, and rear side combines
Portion 28 (especially heteromorphism part 28a) constitutes the second engaging portion in claims, and support engaging portion 34 constitutes claims
In third engaging portion.
Spoke 36 carries out the component that warpage is process using to a piece of iron plate afterwards.In addition, rear spoke 36 with side spoke
On the orthogonal direction of item 32, one end is formed with the connecting hole 36a for being fixed on hub core 40 using rivet 12, and the other end is formed
There is the locking pawl 36b being engaging in locking hole 26a.
Hub core 40 forms plate made of iron by punching etc. to be had as shown in Figures 4 and 5: boss plate portion 42;It is formed
Wheel bore 44 in the center (center of rim part 20) in boss plate portion 42;Boss plate portion 42 is coaxially attached to wheel bore 44
Columned hub body 46;And the spring supporting portion 48 near the both ends of support spring part 60.In addition, in boss plate portion 42
It is formed with adjacent with spring supporting portion 48 and the jet pipe of the protrusion for the jet pipe shape being formed on airbag apparatus (not shown) is supported to insert
Through-hole 42b.
Hub body 46 is by the shape in such a way that nut 82 is supported on the front end for being inserted into the steering stem shaft 80 of wheel bore 44
Cylindrical shape as the axial length with certain degree.In addition, it is formed with pin 46a in the upper surface of hub body 46, pin 46a
For carrying out arbor 10 engaging with a pair of of the ear 44a being formed on hub core 40 in a manner of adjacent with wheel bore 44
Positioning and rotation stop.In addition, the hub body 46 be also possible to it is integrated.In addition, in the present embodiment, hub core 40 and wheel
Hub main body 46 constitutes the hub portion of each claim.
In addition, ear 44a is formed in boss plate portion 42 in a manner of with the adjoining of wheel bore 44, and constitute and pin 46a
Male and female are different to be made by positioning region when linking steering stem shaft 80 and hub body 46 as hub portion and boss plate portion 42
Be formed in hub body 46 upper surface on the pin 46a as positioning region be mutually clamped.Therefore, as long as being positioned
The ear 44a in portion and pin 46a as positioning region can be mutually clamped, and position, male and female do not limit.
In said structure, the arbor 10 of the steering wheel of present embodiment respectively constitutes rim part 20, spoke portion 30 and hub
Core 40, and rim part 20 is divided into split ring 22 and split ring 26 circumferentially, it is made of these combinations.
As a result, according to a variety of demands such as applicable size, forms of vehicle, in split ring 22 and split ring 26, do not need
The split ring 26 of the side of very big intensity can be configured to smaller intensity, need the split ring 22 of the side of bigger intensity
It can be configured to biggish intensity.This is as a result, it is possible to be avoided the complete cycle throughout rim part 20 such as from being formed as the feelings of same intensity
The part that condition did not needed very big intensity originally like that also vainly ensures biggish intensity.Therefore, it can be realized the drop of weight
Low and manufacturing cost reduction.
In addition, in the arbor 10 of the steering wheel of present embodiment, set on substantially the half of the front side of vehicle in rim part 20
The split ring 22 of annulus shape makes the front side joint portion 24 at its both ends be shaped generally as "U" shaped sections, set on the rear of vehicle
The split ring 26 of the substantially semicircular ring shape of side makes the rear side joint portion 28 at its both ends be shaped generally as " I " shaped sections.
At this point, split ring 22 makes the opening direction of the substantially "U" shaped sections of front side joint portion 24 for example towards radial direction
Inner circumferential side (or peripheral side) is open.On the other hand, split ring 26 make its form force direction to front side joint portion 24
Open contrary direction force, that is, if front side joint portion 24 is opened to radially inner side, exert a force towards radial outside, if
Front side joint portion 24 is opened to radial outside, then is exerted a force towards radially inner side.By the force, after generally " i " shaped sections
Side engaging portion 28 is naturally chimeric with the front side joint portion 24 of substantially "U" shaped sections by the spring effect of elasticity, makes circumferential two
Combination made of end is overlapping one another has anticreep effect, and can properly ensure to position and press, and can be improved
Operating efficiency.
Fig. 6 and Fig. 7 indicates the major part of the arbor 10 of the steering wheel of present embodiment, out of radially outer peripheral side direction
In the state that side is overlapped front side joint portion 24, support engaging portion 34, rear side joint portion 28 in a predefined order, pass through conduct
The rivet 14 of the bonded block penetrated through radially is mutually tight by front side joint portion 24, support engaging portion 34, rear side joint portion 28
It is solidly connected, so as to ensure lightweight and can readily insure that intensity.
At this point, in the present embodiment, the opening direction court of the substantially "U" shaped sections by making front side joint portion 24
Open to radial inner circumferential side, the rivet 14 by penetrating through radially by front side joint portion 24, support engaging portion 34, rear side
When engaging portion 28 is mutually fastenedly connected, the case where overlap condition that will not occur them is released from.
In addition, making the opening direction of the front side joint portion 24 positioned at radially outer peripheral side and by front side joint portion 24 and rear side knot
Conjunction portion 28 clamps and opens for the opening direction for the support engaging portion 34 that rivet 14 penetrates through radially towards radial inner circumferential side
And it is overlapped.
As a result, due to the opening direction of the substantially "U" font of the cross sectional shape as front side joint portion 24 and as support
The opening direction of the substantially "U" font of the cross sectional shape of engaging portion 34 is consistent, therefore, passes through the section for making to support engaging portion 34
Shape is less than the cross sectional shape of front side joint portion 24, and the cross sectional shape of rear side joint portion 28 is made to be less than the section of support engaging portion 34
Shape, thereby, it is possible to thickness when being overlapped split ring 22, spoke portion 30, split ring 26 radially is thinned, additionally it is possible to store
In front side joint portion 24.
In addition, making front side joint portion 24, supporting engaging portion 34, rear side joint portion 28 to be overlapped radially and utilize rivet
14 when being fastenedly connected, and can further make rear side joint portion 28 and support engaging portion 34 be difficult to fall off from front side joint portion 24, energy
Enough further increase workability.
In turn, by front end in front side joint portion 24, being combined than rear side joint portion 28 by circumferential inboard
Position forms the rotation prevention portion 24b more narrowed than the height low land of rear side joint portion 28, is capable of forming split ring 26 relative to split ring
22 rotation stop.
Fig. 8 shows the major part of the arbor 10 of the steering wheel of second embodiment of the present invention, make to support engaging portion 34
Cross sectional shape be not to be formed as "U" font as above-mentioned first embodiment and be created as " L " font.
That is, as long as support engaging portion 34 can be in the inside of front side joint portion 24 storage support engaging portion 34 and for rivet 14
Perforation, then support engaging portion 34 to need not be the section of "U" font.
In this configuration, the function and effect being the same as the above first embodiment also be can be realized.
Fig. 9 indicates the major part of the arbor 10 of the steering wheel of third embodiment of the present invention, makes front side joint portion
The opening direction of 24 substantially "U" shaped sections is open towards radial inner circumferential side and makes front side joint portion 24, rear side joint portion
28, when support engaging portion 34 is sequentially passed through the rivet 14 penetrated through radially with this and is mutually fastenedly connected, for example, passing through split ring
The setting of the radial length of the 22 spring effect or side spoke 32 towards radially inner side, plays the work in direction close to each other
With their overlap condition difficulty is released from.
In this configuration, the function and effect being the same as the above first embodiment also be can be realized.
Figure 10 indicates the major part of the arbor 10 of the steering wheel of the 4th embodiment of the invention, makes front side joint portion
The opening direction of 24 substantially "U" shaped sections is open towards radial peripheral side and makes rear side joint portion 28, support engaging portion
34, when front side joint portion 24 is sequentially passed through the rivet 14 penetrated through radially with this and is mutually fastenedly connected, for example, passing through split ring
The spring towards radial outside of the 26 spring effect and split ring 26 towards radially inner side acts on, and plays side close to each other
To effect, their overlap condition difficulty is released from.
In this configuration, the function and effect being the same as the above first embodiment also be can be realized.
But the radial inner circumferential side (inside) or peripheral side of the split ring 22 of above-mentioned each embodiment or split ring 26
The elasticity (spring effect) of (outside) makes front side joint portion 24, support engaging portion 34, rear side joint portion 28 in radial direction with adjoint
Upper overlapping and structure (shape) itself when being fastenedly connected using rivet 14, particularly the front side joint portion 24 for keeping rigidity high are formed
For the synergy of substantially "U" shaped sections, it is not necessary to structure important document.
In addition, then can further ensure that split ring 26 relative to split ring 22 according to shapes such as heteromorphism parts 24a, 26a
Rotation stop effect, if formed rotation prevention portion 24b, heteromorphism part 24a, 26a can also be made to be formed with circular arc identical with central portion.Separately
Outside, on the contrary, rotation prevention portion 24b can also be abolished if forming heteromorphism part 24a, 26a.
In turn, in the above-described embodiment, consider from lightweight and indissoluble viewpoint, illustrate and made using rivet 14
It is fastenedly connected into indissoluble situation for bonded block and by split ring 22, spoke portion 30 and split ring 26, but as combination
Component, can also be using the fastening structure for having used the secure components such as screw bolt and nut, primary screw, tapping screw, various pins.
Description of symbols
10 arbors
14 rivets (bonded block)
20 rim parts
22 split rings (the first split ring)
24 front side joint portions (the first engaging portion)
24a heteromorphism part (front end)
24b rotation prevention portion
24c hole portion
26 split rings (the second split ring)
28 rear side joint portions (the second engaging portion)
28a heteromorphism part
28b rivet connecting hole
30 spoke portions
32 side spokes
34 supports engaging portion (third engaging portion)
34a rivet through hole
Spoke after 36
40 hub cores (hub portion)
44 wheel bores
44a ear (by positioning region)
46 hub bodies
46a pin (positioning region)
60 spring parts
80 steering stem shafts