JP3640052B2 - Shaft caulking method - Google Patents
Shaft caulking method Download PDFInfo
- Publication number
- JP3640052B2 JP3640052B2 JP00574298A JP574298A JP3640052B2 JP 3640052 B2 JP3640052 B2 JP 3640052B2 JP 00574298 A JP00574298 A JP 00574298A JP 574298 A JP574298 A JP 574298A JP 3640052 B2 JP3640052 B2 JP 3640052B2
- Authority
- JP
- Japan
- Prior art keywords
- shaft
- flange
- diameter
- caulking
- lever
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- Pivots And Pivotal Connections (AREA)
Description
【0001】
【発明の属する技術分野】
本発明は、2枚のレバーを回動可能に連結するシャフトのかしめ方法に関する。
【0002】
【従来の技術】
例えばトランクヒンジのように、2枚のレバーを、互いにがたつくことなく、かつある程度の抵抗をもって回動可能に連結する場合には、図6に示すような、小径部(11a)と大径部(11b)と拡径フランジ(11c)を上下に連結した段付きシャフト(11)が用いられる。
【0003】
例えば、図7及び図8に示すように、シャフト(11)を一方のレバー(12)の軸孔(12a)と他方のレバー(13)の軸孔(13a)に圧入されたブッシュ(14)とに挿入した状態で、シャフト(11)の拡径フランジ(11c)を、かしめ機の上面が平坦な受け台(15)に載せ、かしめ機のスピンヘッド(16)を、軸方向下向きに圧力を加えながら回転させて、シャフト(11)の上端部(11d)をかしめることにより、2枚のレバー(12)(13)は、シャフト(11)により互いに回動可能に連結される。
【0004】
【発明が解決しようとする課題】
しかしながら、上述した従来のシャフトのかしめ方法においては、図6に示すように、シャフト(11)の大径部(11b)の長さ(A)は、大径部(11b)に嵌入されるレバー(13)をシャフト(11)に対して回動可能にするため、レバー(13)の板厚公差、及びブッシュ(14)におけるフランジの厚さの公差を考慮して、レバー(13)とブッシュ(14)のフランジ(14a)とを重ねた寸法(B)より大きく設定されている。
【0005】
従って、2枚のレバー(12)(13)を連結した後に、図9に示すように、シャフト(11)のフランジ(11c)とブッシュ(14)のフランジ(14a)との間に、隙間(C)が発生してしまい、この隙間(C)が、レバー(12)(13)連結後の軸方向のがた付きの原因になり、異音の発生やレバーの変形等の不具合が生じており、この隙間(C)はかしめ調整ではなくすことができなかった。
【0006】
また、レバーをがた付かせることなく、円滑に回動させるためには、レバーの板厚公差やブッシュ厚公差を考慮して、シャフト(11)の大径部(11b)の長さ(A)を決定しなければならないが、かかる長さ(A)の決定には、幾多の要素が関連するため、必ずしも容易ではない。
【0007】
本発明の目的は、従来の問題に鑑み、シャフトに対するレバーの軸方向のがた付きを確実に防止しうるようにするとともに、段付きシャフトの段付き部の長さの設定を容易に行えるようにした、シャフトのかしめ方法を提供することを目的としている。
【0008】
【課題を解決するための手段】
本発明によると、上記課題は、次のようにして解決される。
(1) 2枚のレバーに穿設した軸孔を、前記両レバーの板厚の合計より若干長めで、かつ一端に拡径フランジが形成されたシャフトに遊嵌し、前記シャフトの他端部に、前記拡径フランジ側を向く力を加えて、前記シャフトの他端部を拡径するように塑性変形させることにより、前記2枚のレバーを回動可能に連結するようにしたシャフトのかしめ方法において、かしめ機の受け台の表面に、前記拡径フランジより大寸とした円錐状の凹部を設け、この凹部に前記拡径フランジを載せた後、前記シャフトの他端部をかしめることにより、前記拡径フランジの周縁部を、シャフト他端側に向かって屈曲させる。
【0009】
(2) 上記(1)項において、シャフトを、小径部と大径部とを備える段付きシャフトとし、前記小径部と大径部のそれぞれに前記レバーの軸孔を嵌合させるとともに、小径部と大径部の長さを、取り付けられるレバーの板厚より若干長めとする。
【0010】
(3) 上記(1)または(2)項において、シャフトの拡径フランジの表面に、周縁部を残すようにして凹部を形成しておく。
【0011】
【発明の実施の形態】
図1〜図3は、本発明の一実施形態を示す。
(1)(2)は、例えば自動車のトランクヒンジに使用するべく、要所に軸孔(1a)(2a)が穿設されたレバー、(3)は、一方のレバー(2)の軸孔(2a)に嵌入され、拡径フランジ(3a)を有する軸受け用のブッシュ、(4)は、レバー(1)(2)を互いに回動可能に連結するための段付きシャフトで、小径部(4a)と大径部(4b)と拡径フランジ(4c)を上下に連設したものである。
【0012】
(5)は、シャフト(4)の拡径フランジ(4c)が載せられるかしめ機の受け台、(6)は、シャフト(4)の先端をかしめるかしめ機のスピンヘッドである。受け台(5)におけるシャフト(4)のかしめ時に、拡径フランジ(4c)が載せられる上面中心部(5a)は、ほぼ円錐形状に凹んでいる。
【0013】
図1に示すように、シャフト(4)の拡径フランジ(4c)を、受け台(5)の上面中心部(5a)へ浮かせた状態で受け台(5)に載せて固定し、スピンヘッド(6)を下向きに所定の圧力をかけながら回転させることにより、シャフト(4)の上端部(4d)は横方向に拡径しながらかしめられる(図1参照)。
【0014】
このとき、スピンヘッド(6)からシャフト(4)に作用する圧力は、受け台(5)に接触した拡径フランジ(4c)の周縁部に集中するため、拡径フランジ(4c)の周縁部は、受け台(5)の凹みに沿ってブッシュ(3)の拡径フランジ(3a)側に向かって屈曲するように塑性変形させられる。すなわち、キノコ状に変形させられる。この変形により、かしめ前に存在したシャフト(4)の拡径フランジ(4c)とブッシュ(3)の拡径フランジ(3a)との間の隙間はほぼ無くなり、レバー(2)のシャフト(4)の軸方向へのがた付きが確実に防止される。
【0015】
図4及び図5は、本発明の他の実施形態を示す。
この実施形態では、小径部(7a)と大径部(7b)と拡径フランジ(7c)を上下に連設した段付きシャフト(7)の拡径フランジ(7c)の下面に、その周縁部を残すようにして上向凹部(7d)を形成してある。そのため、拡径フランジ(7c)の中心部は薄肉となっており、スピンヘッド(6)に加えるかしめの圧力を小さくしても、シャフト(7)の拡径フランジ(7c)の周縁部を容易に変形させることができ、拡径フランジ(7c)の変形の精度向上を図ることができる。
他の構成は、前記実施形態と同様であるので、同一部分については、同一の符号を付して詳細な説明は省略する。
【0016】
【発明の効果】
本発明によれば、以下のような効果が奏せられる。
(a) 請求項1記載の発明のようなかしめ方法によれば、シャフトの拡径フランジの周縁部が、受け台に沿ってシャフトの他端側に向かって屈曲され、ほぼキノコ状に変形させられることにより、従来のかしめ方法によってかしめられた場合には存在した、シャフトのフランジとレバーとの間の隙間がほぼ無くなるので、レバーのシャフトに対する軸方向へのがた付きを確実に防止することができる。
【0017】
(b) 請求項2記載の発明によれば、シャフトに段付部を形成する場合に、レバーの板厚公差を考慮することなく、段付部の長さを容易に設定できるので、加工公差を大きくすることができる。
【0018】
(c) 請求項3記載の発明のように、シャフトのフランジの表面に、周縁部を残すようにして凹部を形成したことにより、シャフトのフランジの変形を容易にして、フランジの変形の精度向上を図ることができる。
【図面の簡単な説明】
【図1】本発明の一実施形態のかしめ方法によるかしめ作業初期段階の状態を示す要部の縦断面図である。
【図2】同じくかしめ作業最終段階の状態を示す要部の縦断面図である。
【図3】同じくトランクヒンジの要部の分解斜視図である。
【図4】本発明の他の実施形態のかしめ方法によるかしめ作業初期段階の状態を示す要部の縦断面図である。
【図5】同じくかしめ作業最終段階の状態を示す要部の縦断面図である。
【図6】従来例におけるシャフトとレバーとの一部縦断正面図である。
【図7】従来のかしめ方法によるかしめ作業初期段階の状態を示す要部の縦断面図である。
【図8】同じくかしめ作業最終段階の状態を示す要部の縦断面図である。
【図9】同じくかしめ作業後のトランクヒンジの要部の縦断面図である。
【符号の説明】
(1)(2)レバー
(3)ブッシュ
(3a)拡径フランジ
(4)シャフト
(4a)小径部
(4b)大径部
(4c)拡径フランジ
(4d)上端部
(5)受け台
(5a)中心部
(6)スピンヘッド
(7)シャフト
(7a)小径部
(7b)大径部
(7c)拡径フランジ
(7d)上向凹部[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a method for caulking a shaft that rotatably connects two levers.
[0002]
[Prior art]
For example, when two levers such as a trunk hinge are connected to each other so as not to rattle and rotate with a certain degree of resistance, a small diameter portion (11a) and a large diameter portion (as shown in FIG. A stepped shaft (11) in which 11b) and a diameter-enlarged flange (11c) are connected vertically is used.
[0003]
For example, as shown in FIGS. 7 and 8, a bush (14) in which a shaft (11) is press-fitted into a shaft hole (12a) of one lever (12) and a shaft hole (13a) of the other lever (13). In the state where the shaft is inserted, the diameter-enlarging flange (11c) of the shaft (11) is placed on the cradle (15) whose upper surface of the caulking machine is flat, and the spin head (16) of the caulking machine is pressed downward in the axial direction. The two levers (12) and (13) are pivotally connected to each other by the shaft (11) by rotating the shaft (11) and caulking the upper end (11d) of the shaft (11).
[0004]
[Problems to be solved by the invention]
However, in the above-described conventional shaft caulking method, as shown in FIG. 6, the length (A) of the large-diameter portion (11b) of the shaft (11) is the lever fitted into the large-diameter portion (11b). In order to make the (13) pivotable with respect to the shaft (11), the lever (13) and bushing are considered in consideration of the plate thickness tolerance of the lever (13) and the flange thickness tolerance of the bush (14). It is set to be larger than the dimension (B) obtained by overlapping the flange (14a) of (14).
[0005]
Therefore, after connecting the two levers (12) and (13), as shown in FIG. 9, there is a clearance (between the flange (11c) of the shaft (11) and the flange (14a) of the bush (14). C) occurs, and this gap (C) causes rattling in the axial direction after connecting the levers (12) and (13), resulting in malfunctions such as abnormal noise and lever deformation. This gap (C) could not be eliminated by caulking adjustment.
[0006]
In order to smoothly rotate the lever without rattling, the length (A) of the large-diameter portion (11b) of the shaft (11) is considered in consideration of the plate thickness tolerance and bush thickness tolerance of the lever. ) Must be determined, but the determination of the length (A) is not always easy because many factors are involved.
[0007]
The object of the present invention is to make it possible to reliably prevent rattling of the lever in the axial direction with respect to the shaft and to easily set the length of the stepped portion of the stepped shaft in view of the conventional problems. An object of the present invention is to provide a method for caulking a shaft.
[0008]
[Means for Solving the Problems]
According to the present invention, the above problem is solved as follows.
(1) The shaft hole drilled in the two levers is loosely fitted to a shaft that is slightly longer than the total thickness of the two levers and has an enlarged flange at one end, and the other end of the shaft. Further, by applying a force toward the diameter-enlarging flange to plastically deform the other end of the shaft so as to expand the diameter, the shaft is caulked so that the two levers can be pivotally connected. In the method, a conical recess that is larger than the diameter-enlarged flange is provided on the surface of the cradle of the caulking machine. Thus, the peripheral edge portion of the diameter-enlarged flange is bent toward the other end side of the shaft.
[0009]
(2) In the above item (1), the shaft is a stepped shaft having a small diameter part and a large diameter part, and the shaft hole of the lever is fitted to each of the small diameter part and the large diameter part, and the small diameter part The length of the large diameter part is slightly longer than the thickness of the lever to be attached.
[0010]
(3) In the above item (1) or (2), a recess is formed on the surface of the diameter-enlarged flange of the shaft so as to leave a peripheral edge.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
1 to 3 show an embodiment of the present invention.
(1) (2) is a lever with a shaft hole (1a) (2a) drilled at a key point for use in, for example, a trunk hinge of an automobile. (3) is a shaft hole of one lever (2). (2a) A bushing for bearings having a diameter-enlarging flange (3a), (4) is a stepped shaft for connecting the levers (1) and (2) to each other in a rotatable manner. 4a), a large-diameter portion (4b), and an enlarged-diameter flange (4c) are connected in series.
[0012]
(5) is a caulking cradle on which the diameter-enlarged flange (4c) of the shaft (4) is placed, and (6) is a caulking machine spin head that caulks the tip of the shaft (4). When caulking the shaft (4) in the cradle (5), the upper surface center portion (5a) on which the diameter-enlarged flange (4c) is placed is recessed in a substantially conical shape.
[0013]
As shown in FIG. 1, the diameter-enlarged flange (4c) of the shaft (4) is mounted on the cradle (5) in a state where it is floated on the center (5a) of the upper surface of the cradle (5). By rotating (6) downward while applying a predetermined pressure, the upper end (4d) of the shaft (4) is caulked while expanding in the lateral direction (see FIG. 1).
[0014]
At this time, the pressure acting on the shaft (4) from the spin head (6) is concentrated on the peripheral edge of the enlarged diameter flange (4c) in contact with the cradle (5), so the peripheral edge of the enlarged diameter flange (4c) Is plastically deformed so as to bend toward the diameter-enlarged flange (3a) side of the bush (3) along the recess of the cradle (5). That is, it is deformed into a mushroom shape. Due to this deformation, the gap between the enlarged flange (4c) of the shaft (4) and the enlarged flange (3a) of the bush (3) that existed before caulking is almost eliminated, and the shaft (4) of the lever (2) is eliminated. Shaking in the axial direction is reliably prevented.
[0015]
4 and 5 show another embodiment of the present invention.
In this embodiment, on the lower surface of the enlarged diameter flange (7c) of the stepped shaft (7) in which the small diameter portion (7a), the large diameter portion (7b), and the enlarged diameter flange (7c) are connected vertically, the peripheral portion An upward recess (7d) is formed so as to leave Therefore, the central portion of the diameter-enlarged flange (7c) is thin, and the peripheral edge of the diameter-enlarged flange (7c) of the shaft (7) can be easily formed even if the caulking pressure applied to the spin head (6) is reduced. The deformation accuracy of the enlarged diameter flange (7c) can be improved.
Since other configurations are the same as those of the above-described embodiment, the same portions are denoted by the same reference numerals, and detailed description thereof is omitted.
[0016]
【The invention's effect】
According to the present invention, the following effects can be obtained.
(a) According to the caulking method as in the invention described in
[0017]
(b) According to the invention described in
[0018]
(c) Since the concave portion is formed on the surface of the flange of the shaft so as to leave the peripheral edge as in the invention described in
[Brief description of the drawings]
FIG. 1 is a longitudinal sectional view of a main part showing a state of an initial stage of caulking work by a caulking method according to an embodiment of the present invention.
FIG. 2 is a longitudinal sectional view of an essential part showing the state of the final stage of caulking work.
FIG. 3 is an exploded perspective view of the main part of the trunk hinge.
FIG. 4 is a longitudinal sectional view of a main part showing a state of an initial stage of caulking work by a caulking method according to another embodiment of the present invention.
FIG. 5 is a longitudinal sectional view of the main part showing the state of the final stage of caulking work.
FIG. 6 is a partially longitudinal front view of a shaft and a lever in a conventional example.
FIG. 7 is a longitudinal sectional view of a main part showing a state of an initial stage of caulking work by a conventional caulking method.
FIG. 8 is a longitudinal sectional view of the main part showing the state of the final stage of caulking work.
FIG. 9 is a longitudinal sectional view of the main part of the trunk hinge after caulking work.
[Explanation of symbols]
(1) (2) Lever
(3) Bush
(3a) Expanded flange
(4) Shaft
(4a) Small diameter part
(4b) Large diameter part
(4c) Expanded flange
(4d) Upper end
(5) cradle
(5a) Center
(6) Spin head
(7) Shaft
(7a) Small diameter part
(7b) Large diameter part
(7c) Expanded flange
(7d) Upward recess
Claims (3)
かしめ機の受け台の表面に、前記拡径フランジより大寸とした円錐状の凹部を設け、この凹部に前記拡径フランジを載せた後、前記シャフトの他端部をかしめることにより、前記拡径フランジの周縁部を、シャフト他端側に向かって屈曲させることを特徴とするシャフトのかしめ方法。The shaft hole drilled in the two levers is loosely fitted to a shaft that is slightly longer than the total thickness of both levers and has an enlarged flange at one end, and the other end of the shaft In the caulking method of the shaft, the two levers are rotatably connected by applying a force directed toward the diameter-enlarging flange and plastically deforming the other end of the shaft to expand the diameter.
By providing a conical recess that is larger than the diameter-enlarged flange on the surface of the cradle of the caulking machine, and placing the diameter-enlarged flange in the recess, the other end of the shaft is caulked, A method of caulking a shaft, wherein the peripheral edge of the expanded flange is bent toward the other end of the shaft.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP00574298A JP3640052B2 (en) | 1998-01-14 | 1998-01-14 | Shaft caulking method |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP00574298A JP3640052B2 (en) | 1998-01-14 | 1998-01-14 | Shaft caulking method |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH11201138A JPH11201138A (en) | 1999-07-27 |
JP3640052B2 true JP3640052B2 (en) | 2005-04-20 |
Family
ID=11619566
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP00574298A Expired - Fee Related JP3640052B2 (en) | 1998-01-14 | 1998-01-14 | Shaft caulking method |
Country Status (1)
Country | Link |
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JP (1) | JP3640052B2 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
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JP4736867B2 (en) * | 2006-03-07 | 2011-07-27 | オイレス工業株式会社 | Cylindrical cylindrical bearing bush, manufacturing method thereof, and hinge structure using the cylindrical cylindrical bushing |
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1998
- 1998-01-14 JP JP00574298A patent/JP3640052B2/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
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JPH11201138A (en) | 1999-07-27 |
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