JPH07317795A - Flexible joint - Google Patents

Abstract

PURPOSE:To prevent electrocorrosion of parts so as not to break a head of a flanged bush by forming, among two kinds of flanged bushes, the flanged bush on the side of an intermediate joint, so as to surround an outer periphery of a head of an installation bolt. CONSTITUTION:A flanged bush 41 is made of insulative material such as ceramic. A rotation preventive cutout 41a and circumferential cutout 41b are formed so as to make an area surrounding an outer periphery of a head including a cylindrical part of a reamer bolt 5 abut an inner diameter side of the head of the flanged bush 41. In this flanged bush 41, a flat side surface of the head of the reamer bolt 5 which is semispherically cut out abuts against the cutout 41a of the flanged bush 41 when a plate spring 4 is installed on a joint or an intermediate joint, by torque for fastening a nut 8. This portion is formed so as to surround an outer periphery of the head of the reamer bolt, so that rigidity and strength at the time of bolt fastening are improved. In addition, breaking and dropping are prevented, and insulation of the joint is kept.

Description

【発明の詳細な説明】Detailed Description of the Invention

【０００１】[0001]

【産業上の利用分野】本発明は、電気車などにおける電
動機軸を駆動軸とし、車輪軸に結合された減速装置の小
歯車軸を被駆動軸とする駆動装置の可撓継手の絶縁に関
するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an insulation of a flexible joint of a drive device in which an electric motor shaft in an electric vehicle or the like is used as a drive shaft, and a small gear shaft of a speed reducer connected to a wheel shaft is used as a driven shaft. Is.

【０００２】[0002]

【従来の技術】従来、板ばねを使用した可撓継手の絶縁
は、図３〜図６に示される。図３はその一例を示す図４
のＢ−Ｂ線矢視方向断面図、図４は図３のＡ−Ａ線矢視
方向断面図、図５は板ばね締結部の詳細を示す拡大断面
図、図６は図５のＤ−Ｄ線矢視方向側面図である。図３
〜図６において、１は駆動軸、11は駆動軸１と軸方向に
対向する被駆動軸、２，12は継手であり、ボス部２ｄ，
12ｄがそれぞれ駆動軸１および被駆動軸11のテーパ状の
先端部分に嵌着されていると共に、このボス部２ｄ，12
ｄ外周に、反対方向に放射状の継手腕２ａ，12ａが形成
されている。３，13は中間接手であり、相互を複数のボ
ルト，ナット21により結合されて一体化され、この他方
は互に反対方向に形成された放射状の継手腕３ａ，13ａ
が設けられている。４，14は板ばねであり、それぞれ一
方の対角線上の角偶部分が座板６を介して、リーマボル
ト５，ナット８により、継手２，12の放射状の継手腕２
ａ，12ａの先端の座面２ｂ，12ｂに締結され、ナット８
が座金７により、板ばね４，14の正四辺形枠形が回り止
めされている。2. Description of the Related Art Conventionally, insulation of a flexible joint using a leaf spring is shown in FIGS. FIG. 3 shows an example thereof.
4 is a sectional view taken along line BB of FIG. 4, FIG. 4 is a sectional view taken along line AA of FIG. 3, FIG. 5 is an enlarged sectional view showing details of a leaf spring fastening portion, and FIG. It is a D line arrow direction side view. Figure 3
In FIG. 6, 1 is a drive shaft, 11 is a driven shaft that axially opposes the drive shaft 1, 2 and 12 are joints, and the bosses 2d,
12d are respectively fitted to the tapered tip portions of the drive shaft 1 and the driven shaft 11, and the boss portions 2d, 12
Radial joint arms 2a and 12a are formed in the opposite direction on the outer circumference of d. Reference numerals 3 and 13 are middle joints, which are connected to each other by a plurality of bolts and nuts 21 to be integrated with each other, and the other is formed with radial joint arms 3a and 13a formed in directions opposite to each other.
Is provided. Reference numerals 4 and 14 are leaf springs, and one corner portion on one diagonal line of each of them is a radial joint arm 2 of joints 2 and 12 by means of a reamer bolt 5 and a nut 8 via a seat plate 6.
The nut 8 is fastened to the bearing surfaces 2b and 12b at the tips of a and 12a.
By the washer 7, the regular quadrilateral frame shape of the leaf springs 4 and 14 is stopped.

【０００３】板ばね４，14のもう一方の対角線上の角偶
部は、座板６を介して、リーマボルト５およびナット８
によりそれぞれ中間継手３，13の放射状の継手腕３ａの
先端の座面３ｂ，13ｂに締結され、ナット８が座金７に
より回り止めされている。このように構成された可撓継
手における作用は、駆動軸１からの回転動力は継手２，
板ばね４，中間継手13，板ばね14，継手12を介して、被
駆動軸11に伝達され、この動力伝達中に生じる駆動軸１
と被駆動軸11の軸心間の相対変位は、両板ばね４，14に
よって吸収される。The other diagonal corners of the leaf springs 4 and 14 are provided with a reamer bolt 5 and a nut 8 via a seat plate 6.
Are fastened to the bearing surfaces 3b and 13b at the ends of the radial joint arms 3a of the intermediate joints 3 and 13, respectively, and the nut 8 is stopped by the washer 7. The action of the flexible joint configured as described above is that the rotational power from the drive shaft 1 is generated by the joint 2,
The drive shaft 1 is transmitted to the driven shaft 11 via the leaf spring 4, the intermediate joint 13, the leaf spring 14, and the joint 12, and is generated during the power transmission.
The relative displacement between the driven shaft 11 and the shaft center of the driven shaft 11 is absorbed by the leaf springs 4 and 14.

【０００４】また、図５，図６に示す、31，32は鍔付ブ
ッシュであり、鍔付ブッシュ31はセラミックなどの絶縁
材よりなり、その軸外径部は図３に示す継手２，12の継
手腕２ａ，12ａまたは中間継手３，13の継手腕３ａ，13
a とのそれぞれ締結用穴ａの板ばね４側に嵌合し、鍔付
ブッシュ32は同様にしてセラミックなどの絶縁材よりな
り、中間継手３，13側の前記締結用穴ａに嵌合されてい
る。この鍔付ブッシュ32の反板ばね４側の一部には、図
６に示すように、切り込み部が設けらりれている。Further, 31 and 32 shown in FIGS. 5 and 6 are flanged bushes, the flanged bush 31 is made of an insulating material such as ceramic, and the shaft outer diameter portion thereof is the joint 2, 12 shown in FIG. Joint arms 2a, 12a or intermediate joints 3, 13 of joint arms 3a, 13
a is fitted to the leaf spring 4 side of the fastening hole a, and the flanged bush 32 is similarly made of an insulating material such as ceramic and is fitted to the fastening holes a on the intermediate joints 3 and 13 side. ing. As shown in FIG. 6, a notch is formed in a part of the flanged bush 32 on the side opposite to the leaf spring 4.

【０００５】すなわち、継手腕２ａ，３ａには回り止め
用の切り欠き部２ｃ，３ｃが設けられ、またリーマボル
ト５の頭部の一部は、これに対向して切り欠き部32a が
設けられている。そして、これら切り欠き部２ｃ，３ｃ
と32a の間に鍔付ブッシュ32の頭部が嵌挿出来るように
切り込まれている。このことにより、継手締結部に絶縁
物の鍔付ブッシュ31，32が装着されているので、継手
２，12と板ばね４，14が絶縁され、電動機側の駆動軸１
から減速機側の小歯車軸に動力を伝達する被駆動軸11に
流れる電流回路をしゃ断し、電動機および減速機の軸受
または歯車噛合い面の電蝕を防止している。That is, the joint arms 2a and 3a are provided with notches 2c and 3c for preventing rotation, and a part of the head of the reamer bolt 5 is provided with a notch 32a so as to face it. There is. And these notch parts 2c and 3c
And 32a are cut so that the head of the bush 32 with a collar can be fitted. As a result, since the flanged bushes 31 and 32 made of an insulating material are attached to the joint fastening portion, the joints 2 and 12 and the leaf springs 4 and 14 are insulated, and the drive shaft 1 on the electric motor side is insulated.
The electric current circuit flowing through the driven shaft 11 for transmitting power from the drive shaft to the small gear shaft on the speed reducer side is blocked to prevent galvanic corrosion of the bearings or gear meshing surfaces of the electric motor and the speed reducer.

【０００６】[0006]

【発明が解決しようとする課題】しかし、従来の鍔付ブ
ッシュの回り止めの形状は、図５に示すごとく、断面Ｌ
字形になっているため、ボルト締め付け時にこの回り止
め部分にモーメントが作用し、根元の部分が割損、脱落
し、リーマボルトの頭部と継手に刻設された縁が直接当
接し、これがために継手と板ばねの絶縁がなくなり、電
動機や減速機の軸受、並びに歯車噛合面に電蝕が発生す
る恐れがあった。本発明は上述した点に鑑みて創案され
たもので、その目的とするところは、鍔付ブッシュの頭
部が破損することがないようにし、このことによって、
各部の電蝕を防止するものである。However, the shape of the detent of the conventional bush with collar is a cross section L as shown in FIG.
Since it is in the shape of a letter, a moment acts on this anti-rotation part when tightening the bolt, the root part breaks and falls off, the head of the reamer bolt and the edge engraved on the joint directly contact, which is why The insulation between the joint and the leaf spring is lost, and there is a possibility that electrolytic corrosion may occur on the bearings of the electric motor and the speed reducer, and the gear meshing surface. The present invention was devised in view of the above-mentioned points, and an object of the present invention is to prevent the head portion of the collared bush from being damaged.
It is intended to prevent electrolytic corrosion of each part.

【０００７】[0007]

【課題を解決するための手段】つまり、その目的を達成
するための手段は、駆動軸に嵌着した第１の継手と中間
継手との間、該中間継手と被駆動軸に嵌着した第２の継
手との間をそれぞれ板ばねで連結し、前記各継手と板ば
ねとの締結部に一対箇所以上を、該各継手の締結部に設
けた取付穴に、胴外径を有しかつ取付ボルト（リーマボ
ルト）が貫通する穴を有する絶縁材よりなる２種類の鍔
付ブッシュを、前記各継手の取付穴の両側より装着した
可撓継手において、前記２種類の鍔付ブッシュのうち、
中間継手側の鍔付ブッシュを、取付ボルト（リーマボル
ト）の頭部の外周を覆うよう形成したことにある。[Means for Solving the Problems] That is, the means for achieving the object is a first joint fitted to a drive shaft and an intermediate joint, and a first joint fitted to the intermediate joint and a driven shaft. Each of the two joints is connected by a leaf spring, and at least one pair of joints are provided at the fastening portion between the joint and the leaf spring. In a flexible joint in which two types of flanged bushes made of an insulating material having holes through which mounting bolts (reamer bolts) pass are mounted from both sides of the mounting hole of each joint, among the two types of flanged bushes,
The flanged bush on the intermediate joint side is formed so as to cover the outer circumference of the head of the mounting bolt (reamer bolt).

【０００８】[0008]

【作用】その作用は、次に述べる実施例と併わせて説明
する。以下、本発明の実施例を、図面に基づいて詳述す
る。The operation will be described together with the embodiment described below. Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

【０００９】[0009]

【実施例】図１は本発明の一実施例を示す拡大断面図、
図２は図１のＣ−Ｃ線矢視方向側面図であり、図中、図
５，６と同符号のものは、同じ構成，機能を有する部分
である。また、全体構成としては、図３，４と類するも
のである。図１および図２において、図５および図６と
異なる点は、鍔付ブッシュ41にある。鍔付ブッシュ41
は、従来と同様、セラミックなどの絶縁材である。従来
のごとく、断面Ｌ字形ではなく、リーマボルト５の円周
部を含めた頭部外周を覆う全域と鍔付ブッシュ41の頭部
の内径側が当接するよう、回り止め用の切り込み部41a
，円周部の切り込み部41b が穿設されている。FIG. 1 is an enlarged sectional view showing an embodiment of the present invention,
FIG. 2 is a side view as seen from the direction of arrows CC in FIG. 1. In the figure, those having the same reference numerals as those in FIGS. The overall configuration is similar to that shown in FIGS. 1 and 2, the difference from FIGS. 5 and 6 lies in the collared bush 41. Bush with collar 41
Is an insulating material such as ceramic, as in the conventional case. As in the conventional case, not only the L-shaped section but also the notch 41a for preventing rotation so that the entire area covering the outer circumference of the head including the circumferential portion of the reamer bolt 5 and the inner diameter side of the head of the flanged bush 41 come into contact with each other.
A notch 41b on the circumference is formed.

【００１０】このようにして構成された鍔付ブッシュ41
は、板ばね４を継手２，12や中間継手３，13に取り付け
るとき、ナット８を締め付けるトルクにより、リーマボ
ルト５の頭部の半月状に取り欠かれた平らな側面が、鍔
付ブッシュ41の切り込み部41a に当接するが、この部分
はリーマボルト頭部全外周を囲むように構成されている
ため、ボルト締め付け時のモーメント作用に対する剛性
強度が著しく強くなり、割損，脱落する恐れがなく、継
手の絶縁が保持される。Bushing 41 having the above structure
When the leaf spring 4 is attached to the joints 2 and 12 and the intermediate joints 3 and 13, the flat side surface of the head portion of the reamer bolt 5 that is cut out in a half-moon shape by the torque that tightens the nut 8 causes Although it abuts the notch 41a, this part is configured so as to surround the entire outer circumference of the reamer bolt head, so the rigidity strength against the moment action when tightening the bolt is significantly increased, and there is no risk of splitting or falling off. Insulation is maintained.

【００１１】[0011]

【発明の効果】以上述べたように、本発明によれば、ボ
ルト締め付けの際、鍔付ブッシュの割損、脱落がなくな
り、可撓継手の絶縁が保持され、電動機および減速機の
軸受または歯車の噛合面の電蝕が防止され、それぞれ本
来のもつ寿命を全うすることができる。As described above, according to the present invention, when the bolt is tightened, the flanged bush is prevented from being broken or dropped, the insulation of the flexible joint is maintained, and the bearings or gears of the electric motor and the speed reducer. Electrolytic corrosion of the mating surface of is prevented, and the original life of each can be fulfilled.

【図面の簡単な説明】[Brief description of drawings]

【図１】本発明の一実施例を示す拡大断面図である。FIG. 1 is an enlarged sectional view showing an embodiment of the present invention.

【図２】図１のＣ−Ｃ線矢視方向側面図である。FIG. 2 is a side view taken along the line CC of FIG.

【図３】従来の一例を示す図４のＢ−Ｂ線矢視方向断面
図である。FIG. 3 is a sectional view taken along the line BB of FIG. 4 showing a conventional example.

【図４】図３のＡ−Ａ線矢視方向断面図である。FIG. 4 is a sectional view taken along line AA of FIG.

【図５】板ばね締結部の詳細を示す拡大断面図である。FIG. 5 is an enlarged cross-sectional view showing details of a leaf spring fastening portion.

【図６】図５のＤ−Ｄ線矢視方向側面図である。FIG. 6 is a side view taken along the line DD of FIG.

【符号の説明】[Explanation of symbols]

１ 駆動軸 ２ 継手 ３ 中間継手 ４ 板ばね ５ リーマボルト 11 被駆動軸 12 継手 13 中間継手 14 板ばね 31 鍔付ブッシュ 32 鍔付ブッシュ 41 鍔付ブッシュ 1 Drive shaft 2 Joint 3 Intermediate joint 4 Leaf spring 5 Reamer bolt 11 Driven shaft 12 Joint 13 Intermediate joint 14 Leaf spring 31 Bush with flange 32 Bush with flange 41 Bush with flange

Claims (1)

【特許請求の範囲】[Claims] 【請求項１】 駆動軸の嵌着した第１の継手と中間継手
との間、該中間継手と駆動軸に嵌着した第２の継手との
間をそれぞれ板ばねで連結し、前記各継手と板ばねとの
締結部の一対箇所以上を該各継手の締結部に設けた取付
穴に、胴外径を有しかつリーマボルトが貫通する穴を有
する絶縁材よりなる２種類の鍔付ブッシュを、前記各継
手の取付穴の両側より装着した可撓継手において、前記
２種類の鍔付ブッシュのうち、中間継手側の鍔付ブッシ
ュを、リーマボルトの頭部の外周を覆うよう形成したこ
とを特徴とする可撓継手。1. A first spring-fitted joint and an intermediate joint of a drive shaft, and a second spring-fitted joint of the intermediate joint and a drive shaft are connected by leaf springs, respectively. Two types of flanged bushes made of an insulating material having an outer diameter of the body and a hole through which a reamer bolt penetrates in a mounting hole provided in a fastening portion of each joint at one or more locations of the fastening portion In the flexible joint mounted from both sides of the mounting hole of each joint, the flanged bush on the intermediate joint side of the two types of flanged bushes is formed so as to cover the outer circumference of the head of the reamer bolt. Flexible joint.