JPH11159505A - Coupling structure for aluminum member - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the cost by eliminating the necessity of thermo-hardening process, and to provide a coupling with a high strength in a sliding direction. SOLUTION: In a tructure in which an aluminum link body 1 and an aluminum parallelepiped extension part 4 are overlapped with each other, and the overlapped parts thereof are coupled together by means of a bolt 8 and a nut 9, a hard stopper member 6 formed thereon on opposite sides in the overlapping direct, with wedge parts 7 which can wedge into the aluminum members is interposed between the overlapped parts around bolt insertion holes 2, 5, and the wedge part 7 on one side of the hard member 6 is wedged into the link body 1 by a pressure of a press and the wedge part 7 on the other side is wedged into the parallelepiped extension part 4 by a pressure of the press. In this condition, the overlapped part are fastened together by the bolt 8 and the nut 9.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a connecting structure of aluminum members, and more particularly, to a connecting structure of an aluminum link body and an aluminum bush mounting portion constituting a suspension link for a vehicle.

[0002]

2. Description of the Related Art A conventional connecting structure of this type includes connecting an aluminum bush mounting portion to a longitudinal end of an aluminum link body by welding, or
As shown in FIG. 13, a prismatic extension c of a bush mounting portion b is inserted into an end of a square pipe-shaped aluminum link body a, and a bolt insertion hole d of the extension c and a link body a are formed. It is known that the bolt f is inserted into the bolt insertion holes d and e in such a state that the bolt f is inserted into the bolt insertion hole e and tightened with a nut g in this state.

[0003]

However, in joining by welding, since the aluminum member is softened by welding, there is an inconvenience that a thermosetting treatment is required after welding and the cost is increased.

In the connection using the bolt f and the nut g, the holding force against the link input is F (bolt axial force) × μ (the friction coefficient of the contact surface between the link body a and the prismatic extension c). ), A general bolt tightening force cannot withstand a large input such as a suspension link of a vehicle, and a slip occurs at a contact surface between the link body a and the prismatic extension c. is there.

SUMMARY OF THE INVENTION The present invention has been made to solve such inconvenience, and it is possible to reduce the cost by eliminating the need for a thermosetting treatment and to obtain a high strength joint in the sliding direction. It is intended to provide a coupling structure.

[0006]

In order to achieve the above object, a connecting structure of an aluminum member according to claim 1 is provided.
A structure in which a first aluminum member and a second aluminum member are overlapped with each other, and the overlapped portion is joined by a bolt, a nut, or a rivet, and an insertion hole of the bolt, nut, or the rivet between the overlapped portions. Around the periphery of the first and second aluminum members, a hard stopper member provided on both sides in the overlapping direction with wedge portions that can bite into the first and second aluminum members is interposed, and the wedge portion on one side of the hard stopper member is the The first aluminum member is bitten by press pressure, and the wedge portion on the other side is bite into the second aluminum member by press pressure. In this state, the overlapped portion is joined by the bolt / nut or the rivet. It is characterized by.

[0007] According to a second aspect of the present invention, in the first aspect, the hard stopper member is formed in a ring shape and arranged along the entire circumference of the insertion hole.

According to a third aspect of the present invention, in the second aspect, the hard stopper member is elliptical.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. First, the first embodiment of the present invention will be described. In this embodiment, an example of a coupling structure of an aluminum link main body and an aluminum bush mounting portion constituting a vehicle suspension link will be described. FIG. 1 is an explanatory cross-sectional view for explaining a coupling structure of an aluminum member according to a first embodiment of the present invention.
FIG. 3 is a perspective view showing a state in which a hard stopper member is arranged on a quadrangular prism-shaped extension of the bush mounting portion, and FIG. 3 is a state in which the rigid stopper member is arranged along the periphery of a bolt insertion hole provided in the quadrangular prism-shaped extension. FIG. 4 is a cross-sectional view showing a state in which a wedge portion on one side of a hard stopper member is cut into the periphery of a bolt insertion hole of a quadrangular prism-shaped extension, and FIG. 5 is a longitudinal end of a link body. FIG. 6 is a perspective view showing the shape, and FIG. 6 is a cross-sectional view showing a state in which a quadrangular prism-shaped extending portion into which a hard stopper member is cut is inserted into the longitudinal end of the link body.

In FIG. 1, reference numeral 1 denotes a link body (first aluminum member) formed by cutting a rectangular pipe material having a rectangular cross section, which is an extruded product of an aluminum alloy, into a predetermined length. Bolt insertion holes 2 are formed concentrically at the center of both sides of the long side (see FIG. 5) of the longitudinal end of the link body 1. A prismatic extension (second aluminum member) 4 of a bush mounting part 3 formed by cutting an aluminum alloy extruded product into a predetermined width is inserted into an end of the link body 1.

The prismatic extending portion 4 is extended from a cylindrical portion (both not shown) to which a cylindrical bush is fitted and fixed by means such as press-fitting.
Has a rectangular shape corresponding to the shape of the end opening. A bolt insertion hole 5 having substantially the same diameter as the bolt insertion hole 2 of the link body 1 is formed on the long side surface of the prism-shaped extension portion 4, and the bolt insertion hole 2 and the bolt insertion hole 5 are concentric with each other. Are located. The upper side surface of the long side of the prismatic extension 4 and the inner surface of the upper side wall of the long side of the end of the link body 1 are contacted and overlapped, and the long side of the prismatic extension 4 is The lower side surface and the inner surface of the lower side wall of the long side of the end of the link body 1 are in contact with each other and overlapped, and between each overlapped portion, the link body 1 and the prismatic extending portion 4 both made of an aluminum member. A hard stopper member 6 having a hardness capable of biting into the body is interposed.

The hard stopper member 6 is formed of, for example, a circular ring made of spring steel having a regular triangular cross section. The inner diameter of the hard stopper member 6 is larger than that of the bolt insertion holes 2, 5, and is substantially the same as the bolt insertion holes 2, 5. Concentrically arranged. In addition, the hard stopper member 6 forms an outer peripheral portion at the base of the equilateral triangle,
An inner peripheral portion is formed at the apex, and a 60 ° wedge portion 7 is formed at each of the intersection between the base and the ridge on one side and the intersection between the base and the ridge on the other side. A wedge portion 7 on one side of the hard stopper member 6 interposed between the upper side surface of the longer side of the prismatic extending portion 4 and the inner surface of the upper side wall of the longer side of the link body 1
Is penetrated into the inner surface of the upper wall of the link body 1 over the entire circumference in the circumferential direction, and the wedge portion 7 on the other side is engaged with the upper surface of the prismatic extension 4 over the entire circumference in the circumferential direction. On the other hand, a wedge portion 7 on one side of the hard stopper member 6 interposed between the lower side surface of the longer side of the prismatic extension 4 and the inner surface of the lower side wall of the end portion of the link body 1
Has penetrated the inner surface of the lower surface of the link body 1 in the entire circumferential direction, and the wedge portion 7 on the other side has penetrated the lower surface of the prism-shaped extending portion 4 in the entire circumferential direction.

In this state, the bolt 8 is inserted into the bolt insertion holes 2 and 5 and the bolt 8 is tightened with the nut 9 so that the end of the link main body 1 has the prismatic extending portion 4 of the bush mounting portion 3. Are combined.

Next, such a coupling method will be described. First,
As shown in FIGS. 2 and 3, hard stopper members 6 are respectively arranged substantially concentrically with the bolt insertion holes 5 on both long side surfaces of the prism-shaped extending portion 4. The member 6 and the prismatic extension 4 are sandwiched and pressed so that the other wedges 7 of the hard stopper members 6 bite into both long sides of the prismatic extension 4 (see FIG. 4). . The biting amount is set to about half of the axial dimension of the hard stopper member 6.

Next, as shown in FIGS. 5 and 6, the prismatic extension 4 into which the hard stopper member 6 is cut is inserted into the end of the link body 1, and the bolt of the prismatic extension 4 is inserted. The insertion hole 5 is aligned with the bolt insertion hole 2 of the link body 1. Next, the end portion of the link body 1 is sandwiched and pressed using a press device, whereby the wedge portion 7 on one side of each hard stopper member 6 is cut into the inner surface of the upper wall and the inner surface of the lower wall of the link body 1 respectively. . Next, the bolts 8 are inserted into the bolt insertion holes 2 and 5, and the bolts 8 are tightened with the nuts 9 so that the hard stopper members 6 do not come off and come off.
Thereby, as shown in FIG. 1, the prism-shaped extending portion 4 of the bush mounting portion 3 is joined to the end of the link main body 1. In FIG. 5, reference numeral 10 denotes a slit formed at the center of both side surfaces on the short side of the end of the link body 1 along the longitudinal direction from the end face of the link body 1. This slit 10
Although not necessary, the slit 10 makes it easier to collapse the end of the link body 1 when pressing the end.

In the connecting structure of the aluminum member having such a structure, the link has a holding force (F (bolt axial force) × μ (friction of a contact surface between the link body 1 and the prism-shaped extending portion 4) by the bolt 8 and the nut 9. Even if a large input exceeding the coefficient) is applied, the rigid stopper member 6 is caught on the link body 1 and the prismatic extension 4 regardless of the holding force, and the contact between the link body 1 and the prismatic extension 4 is caused. Since slip on the surface is prevented, a high-strength bond can be obtained in the slip direction.

Further, since welding is not performed, a thermosetting treatment is not required, and the cost can be reduced accordingly. Further, since a circular ring having no break in the circumferential direction is used as the hard stopper member 6, the coupling rigidity can be increased.

In the above embodiment, a circular ring is used as the hard stopper member 6, but the present invention is not limited to this. For example, a plate-like member or an elliptical ring may be used. When an elliptical ring is used, the coupling rigidity can be increased as in the case of a circular ring, and slip in the rotating direction can be prevented at the same time.

In the above embodiment, the wedge angle of the wedge portion 7 is set to 60 °, but the shape of the wedge portion is not particularly limited as long as it can bite into the link main body 1 and the prismatic extending portion 4. .

Further, in the above-described embodiment, the rigid stopper member 6 is cut into the prism-shaped extension 4 in advance, and then the prism-shaped extension 4 is inserted into the end of the link main body 1. It is not always necessary to do so, and the rectangular columnar extension 4 is mounted with the hard stopper members 6 placed substantially concentrically with the bolt insertion holes 5 on both long sides of the prismatic columnar extension 4. The bolt insertion hole 5 of the prismatic extension 4 is inserted into the end of the link body 1 and the bolt insertion hole 2 of the link body 1 is inserted.
By pressing the end of the link body 1 in this state, the wedge portion 7 on one side of each hard stopper member 6 is cut into the inner surface of the upper wall and the inner surface of the lower wall of the link body 1 at the same time. The wedge portions 7 on the side may be made to bite into both long side surfaces of the prism-shaped extension portion 4. In this case, the gap when the prismatic extension 4 is inserted into the end of the link main body 1 is reduced, and the end of the link main body 1 is less likely to be crushed, so that the slit 10 described above can function effectively. it can.

Next, a second embodiment of the present invention will be described. FIG. 7 is an explanatory cross-sectional view for explaining a connecting structure of aluminum members according to the second embodiment of the present invention. This embodiment differs from the first embodiment in that a rivet 30 is used instead of the bolt 8 and the nut 9. The rivet 30 is inexpensive but does not act on the axial force, so it is unsuitable when coupling rigidity is required. However, in this embodiment, the rigid stopper member 6 is connected to the link body 1 and the corners regardless of the holding force. Since the sliding at the contact surface between the link main body 1 and the rectangular column-shaped extending portion 4 is prevented by being hooked on the column-shaped extending portion 4, the rivet 30 has a function of merely preventing each hard stopper member 6 from coming off. Is sufficient, and as a result, the connection using the rivets 30 can be enabled. Note that the other configuration and operation and effect are the same as those of the first embodiment, and the description thereof will be omitted.

Next, a third embodiment of the present invention will be described. FIG. 8 is an explanatory cross-sectional view for explaining a coupling structure of an aluminum member according to a third embodiment of the present invention.
FIG. 10 is a perspective view showing a state in which a hard stopper member is arranged on a second aluminum member, and FIG. 10 shows a state in which a wedge portion on the other side of the hard stopper member is cut into the periphery of a bolt insertion hole of the second aluminum member. FIG. 11 is a perspective view showing the shape of the end of the first aluminum member, and FIG. 12 is a second aluminum member having the end of the first aluminum member bitten by the wedge on the other side of the hard stopper member. It is sectional drawing which shows the state which arrange | positioned.

In FIG. 8, reference numeral 41 denotes a first aluminum member made of an aluminum H-shaped member (see FIG. 11). A bolt insertion hole 42 is formed in the center of the web plate 41a at the longitudinal end of the first aluminum member 41. A second aluminum member 44 made of an aluminum plate is in contact with the lower side surface of the web plate 41a at the end of the first aluminum member 41, and is overlapped.

The second aluminum member 44 is formed with a bolt insertion hole 45 having substantially the same diameter as the bolt insertion hole 42 of the first aluminum member 41, and the bolt insertion hole 42 and the bolt insertion hole 45 are concentric with each other. Are located. A hard stopper member 46 having a hardness capable of cutting into the first and second aluminum members 41 and 44 is interposed between the overlapping portion of the first aluminum member 41 and the second aluminum member 44. ing.

The hard stopper member 46 is formed of, for example, a circular ring made of spring steel having a regular triangular cross section. The inner diameter of the hard stopper member 46 is larger than that of the bolt insertion holes 42 and 45, and is substantially equal to the bolt insertion holes 42 and 45. Concentrically arranged. In addition, the hard stopper member 46 forms an outer peripheral portion at the base of the equilateral triangle and forms an inner peripheral at the vertex, and forms an intersection between the base and the ridge on one side and a ridge on the other side. Are formed with a 60 ° wedge portion 47 at each intersection. The wedge portion 47 on one side of the hard stopper member 46 bites into the lower surface of the web plate 41a of the first aluminum member 41 in the entire circumferential direction, and the wedge portion 47 on the other side is above the second aluminum member 44. It penetrates the side in the entire circumferential direction.

In this state, the bolt insertion holes 42, 4
The second aluminum member 44 is connected to the end of the first aluminum member 41 by inserting the bolt 48 through the nut 5 and tightening the bolt 48 with the nut 49.

Next, such a coupling method will be described. First,
As shown in FIG. 9, a hard stopper member 46 is arranged on the upper side surface of the second aluminum member 44 substantially concentrically with the bolt insertion hole 45, and in this state, the hard stopper member 46 and the second aluminum member 44 are pressed by a pressing device. And press by pressing the other side of the hard stopper member 46.
Is cut into the upper surface of the second aluminum member 44 (see FIG. 10). Note that the biting amount is set to about half of the axial dimension of the hard stopper member 46.

Next, as shown in FIGS. 11 and 12, the second aluminum member 44, into which the wedge portion 47 on the other side of the hard stopper member 46 has been cut, is connected to the web plate at the end of the first aluminum member 41. The lower surface 41 a is overlapped, and the bolt insertion hole 45 of the second aluminum member 44 is aligned with the bolt insertion hole 42 of the first aluminum member 41. Next, the web plate 41a at the end of the first aluminum member 41 and the second aluminum member 44 are sandwiched and pressed using a pressing device, whereby the wedge portion 47 on one side of the hard stopper member 46 is moved to the first position. Into the lower surface of the web plate 41a of the aluminum member 41. Next, the bolt 48 is inserted into the bolt insertion holes 42 and 45, and the bolt 48 is inserted.
Are tightened with a nut 49 so that the hard stopper member 46 does not come off and thereby separate, so that the second aluminum member 44 is joined to the end of the first aluminum member 41 as shown in FIG. Note that the operation and effect are the same as those of the first embodiment, and a description thereof will be omitted.

[0029]

As is apparent from the above description, according to the first aspect of the present invention, the hard stopper member is caught on the first and second aluminum members irrespective of the holding force of the bolt / nut or rivet. Since the slip at the contact surface between the first aluminum member and the second aluminum member is prevented, an effect that a high-strength bond can be obtained in the slip direction can be obtained.

Further, since welding is not performed, a heat curing treatment is not required, and an effect that cost can be reduced correspondingly is obtained. According to the invention of claim 2, claim 1
In addition to the invention described above, by using a circular ring having no break in the circumferential direction as the hard stopper member, an effect of increasing the coupling rigidity can be obtained.

According to the third aspect of the invention, in addition to the second aspect of the invention, an effect is obtained that slip in the rotation direction can be simultaneously prevented.

[Brief description of the drawings]

FIG. 1 is an explanatory cross-sectional view for explaining a coupling structure of an aluminum member according to a first embodiment of the present invention.

FIG. 2 is a perspective view showing a state in which a hard stopper member is arranged on a quadrangular prism-shaped extending portion of a bush attaching portion.

FIG. 3 is a cross-sectional view showing a state where a hard stopper member is arranged along a periphery of a bolt insertion hole provided in a quadrangular prism-shaped extending portion.

FIG. 4 is a cross-sectional view showing a state in which a wedge portion on one side of a hard stopper member is bitten around a bolt insertion hole of a quadrangular prism-shaped extension portion.

FIG. 5 is a perspective view showing a longitudinal end shape of a link main body.

FIG. 6 is a cross-sectional view showing a state in which a quadrangular prism-shaped extending portion in which a hard stopper member is bitten is inserted into an end of the link body in the longitudinal direction.

FIG. 7 is an explanatory cross-sectional view for explaining a coupling structure of an aluminum member according to a second embodiment of the present invention.

FIG. 8 is an explanatory cross-sectional view for explaining a coupling structure of an aluminum member according to a third embodiment of the present invention.

FIG. 9 is a perspective view showing a state where a hard stopper member is arranged on a second aluminum member.

FIG. 10 is a cross-sectional view showing a state in which a wedge portion on the other side of the hard stopper member is bitten around the bolt insertion hole of the second aluminum member.

FIG. 11 is a perspective view showing an end shape of a first aluminum member.

FIG. 12 is a cross-sectional view showing a state in which a second aluminum member in which a wedge portion on the other side of the hard stopper member is cut into an end of the first aluminum member.

FIG. 13 is an explanatory cross-sectional view for explaining a conventional connection structure of aluminum members.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Link main body (1st aluminum member) 2, 5, 42, 45 ... Bolt insertion hole 4 ... Rectangular column-shaped extension part (2nd aluminum member) 6, 46 ... Hard stopper member 7, 47 ... Wedge part 8 , 48 ... bolt 9, 49 ... nut 30 ... rivet 41 ... first aluminum member 44 ... second aluminum member

Claims (3)

[Claims] 1. A structure in which a first aluminum member and a second aluminum member are overlapped with each other, and the overlapped portions are joined by bolts, nuts, or rivets, wherein the bolts, nuts, or the gaps between the overlapped portions are provided. Around the insertion hole of the rivet, a hard stopper member having wedge portions that can bite into the first and second aluminum members on both sides in the stacking direction is interposed, and the hard stopper member on one side of the hard stopper member is provided. The wedge portion is made to bite into the first aluminum member by press pressure, and the wedge portion on the other side is made to bite into the second aluminum member by press pressure. A joining structure of aluminum members, which is joined by rivets. 2. The aluminum member connecting structure according to claim 1, wherein said hard stopper member is formed in a ring shape and is disposed along the entire circumference of said insertion hole. 3. The structure according to claim 2, wherein said hard stopper member is elliptical.