WO2018146759A1 - Bearing bush and pedal device comprising same - Google Patents
Bearing bush and pedal device comprising same Download PDFInfo
- Publication number
- WO2018146759A1 WO2018146759A1 PCT/JP2017/004652 JP2017004652W WO2018146759A1 WO 2018146759 A1 WO2018146759 A1 WO 2018146759A1 JP 2017004652 W JP2017004652 W JP 2017004652W WO 2018146759 A1 WO2018146759 A1 WO 2018146759A1
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- Prior art keywords
- cylindrical
- curved
- bearing bush
- boss
- axial direction
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C17/00—Sliding-contact bearings for exclusively rotary movement
- F16C17/10—Sliding-contact bearings for exclusively rotary movement for both radial and axial load
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/02—Parts of sliding-contact bearings
- F16C33/04—Brasses; Bushes; Linings
Definitions
- the present invention relates to a bearing bush and a pedal device provided with the bearing bush.
- an automobile brake pedal or clutch pedal is rotatably supported by a vehicle body member, for example, a shaft member supported by a pedal bracket fixed to a dash panel via a cylindrical boss.
- a synthetic resin bearing bush having a flange portion at one end portion is provided on a boss having a pedal arm fixed to the outer peripheral surface.
- a shaft member made of bolts is inserted into the bearing bush with a predetermined clearance (bearing clearance), and the shaft member is a pedal bracket by a nut. Fastened and fixed between.
- an axial gap is provided between the pedal bracket and the bearing bush in order to smoothly rotate the pedal arm, but this gap becomes an axial backlash of the pedal arm.
- the vibration of the pedal arm caused by the rattle may cause an abnormal noise transmitted to the driver, and there is a risk that the pedal pad may roll due to the rattle.
- the operational feeling of the automobile is lowered.
- the dimensional tolerance between the inner diameter of the bearing bush and the outer diameter of the shaft member is made as small as possible to reduce the radial play (bearing clearance) between the bearing bush and the shaft member. ) Is required to be minimized, but if such radial play is reduced, the sliding resistance between the bearing bush and the shaft member increases, and the pedal arm returns as described above. There is a risk that the operation feeling will be lowered as well.
- Patent Document 1 a guide member is provided on the outer peripheral surface of a pedal arm and a boss pivotally attached to a pedal bracket, and a bush is interposed between the guide member and the pedal bracket to reduce the roll of the pedal arm. And a technique for improving the operational feeling of the pedal arm is described, and in Patent Document 2, a push plate nut is fitted and fixed to the end of a fulcrum pin (shaft member), and is inserted into the fulcrum pin. Further, there is described a technique for preventing the fulcrum pin from coming off in the axial direction with the push plate nut and ensuring a smooth rotation of the pedal arm without causing play by causing the fulcrum pin to exert a predetermined pressing force.
- Patent Document 1 and Patent Document 2 are both techniques for preventing the swing of the pedal arm, and an operation feeling due to radial play due to a dimensional tolerance between the bearing bush and the shaft member. In addition to the decrease in noise, no consideration is given to the prevention of abnormal noise.
- the present invention has been made in view of the above-described points, and an object of the present invention is to provide a bearing bush capable of preventing a decrease in operation feeling and noise due to radial play, and the bearing bush.
- the object is to provide a pedal device.
- the bearing bush of the present invention has one cylindrical portion having one cylindrical inner surface and a cylindrical outer surface, and the other cylindrical inner surface in addition to the other cylindrical inner surface having the same diameter as the one cylindrical inner surface. And both ends in the axial direction are positioned more radially inward than the one and the other cylindrical outer surface, while between the both ends in the axial direction than the one and the other cylindrical outer surface.
- a curved convex outer surface positioned radially outward and a curved concave inner surface positioned radially outward than one and the other cylindrical inner surface, and one and the other cylindrical portion in the axial direction A bulging portion disposed between them, an annular flange portion extending radially outward from one axial end portion of one cylindrical portion, and integrally provided at the one end portion, and one and the other cylinder And a slit that allows the diameter-shaped portion and the bulging portion to be reduced in diameter.
- the bearing bush of the present invention the curved convex outer surface that is brought into contact with the inner surface of the boss of the pedal device and the one and the other cylindrical portions having the one and the other cylindrical inner surface that are brought into contact with the outer surface of the shaft member. Since the bulged portion has a diameter that can be reduced by the slit, the inner diameter dimension of one and the other cylindrical inner surface of one and the other cylindrical portion provided with the bulged portion sandwiched in the axial direction and the pedal The bearing clearance (backlash) determined by the dimensional tolerance with the outer diameter of the shaft member of the device can be absorbed, and the deterioration of the operation feeling of the pedal device and the generation of noise due to the radial backlash caused by the bearing clearance are prevented. it can.
- the one and the other cylindrical portions may have the same length in the axial direction, but may alternatively have different lengths in the axial direction.
- the bulging part will be biased to the one or the other cylindrical part side
- the other cylindrical outer surfaces have the same diameter, but may have different diameters.
- the boss into which the one and the other cylindrical parts are inserted is used. What is necessary is just to have a diameter which is smaller than the diameter of an internal peripheral surface, and forms an annular
- each of the curved convex outer surface and the curved concave inner surface is composed of a part of a concentric spherical surface or spheroid surface in a preferred example, but the present invention is not limited to this,
- the convex outer surface only needs to be a continuous convexly curved surface located radially outward from one and the other cylindrical outer surface, and the curved concave inner surface also corresponds to the curved convex outer surface.
- the slits are arranged so that the one and the other cylindrical portions are divided so as to divide the one and the other cylindrical portions and the bulging portion in the circumferential direction around the axial center line of the one and the other cylindrical portions. And open from the end face of one cylindrical portion to the end face of the other cylindrical portion in the axial direction parallel to the axial line or inclined at a certain angle to the axial line.
- An annular ring that communicates with the first slit portion so as to divide the first slit portion provided in one and the other cylindrical portion and the bulging portion and the annular flange portion in the circumferential direction R.
- At least one second slit portion provided on the cylindrical portion and the bulging portion so as to divide the at least the other cylindrical portion and the bulging portion in the circumferential direction R, and an annular flange portion are circular.
- the bearing bush including one and the other cylindrical portion, the bulging portion, and the annular flange portion may be integrally formed from a synthetic resin such as polyacetal resin, polyamide resin, or polyester resin. Or it may be integrally formed from a non-ferrous metal plate such as copper alloy or aluminum or aluminum alloy, or a stainless steel plate, and further, a steel sheet and a porous sintered metal layer formed integrally on the steel sheet and a porous material You may integrally form from the multilayer board which comprised the synthetic resin layer by which the metal sintered layer was filled and coat
- a synthetic resin such as polyacetal resin, polyamide resin, or polyester resin.
- a non-ferrous metal plate such as copper alloy or aluminum or aluminum alloy, or a stainless steel plate
- the pedal device of the present invention includes a cylindrical boss, a pedal arm fixed to the boss, a shaft member disposed in the boss so as to be rotatable relative to the boss, and both ends of the shaft member are fixed.
- An annular space is formed between the pedal bracket and the curved concave inner surface and the outer surface of the shaft member, while at least part of the curved convex outer surface is brought into contact with the inner surface of the boss, And the above-mentioned bearing bush formed by arranging the other cylindrical portion and the bulging portion.
- the bulging portion is reduced.
- at least a part of the curved convex outer surface is in contact with the inner surface of the boss, so that it is always maintained at an appropriate value and the generation of abnormal noise due to the bearing gap is prevented.
- a bearing bush that can prevent a decrease in operation feeling and abnormal noise caused by radial play, and a pedal device including the bearing bush.
- FIG. 1 is an explanatory side view of a preferred example of a bearing bush according to the present invention.
- 2 is a cross-sectional explanatory view taken along the line II-II in FIG.
- FIG. 3 is an explanatory front view of a preferred example of the pedal device of the present invention.
- FIG. 4 is a partially enlarged cross-sectional explanatory view of the example shown in FIG.
- FIG. 5 is an explanatory side view of another preferred example of the bearing bush of the present invention.
- 6 is a cross-sectional explanatory view taken along the line VI-VI in FIG.
- FIG. 7 is an explanatory side view of still another preferred example of the bearing bush of the present invention.
- FIG. 8 is a cross-sectional explanatory view taken along the line VIII-VIII in FIG.
- FIG. 9 is a cross-sectional explanatory view of still another preferred example of the bearing bush of the present invention.
- a bearing bush 1 of this example includes a cylindrical inner surface 2, a cylindrical outer surface 3, an annular tapered surface 4 directly connected to the cylindrical inner surface 2, and a shaft directly connected to the tapered surface 4.
- a cylindrical portion 6 having an annular end surface 5 in the direction X, and a cylindrical inner surface 10 having the same diameter as the diameter r2 of the cylindrical outer surface 3 in addition to the cylindrical inner surface 9 having the same diameter as the diameter r1 of the cylindrical inner surface 2;
- the cylindrical portion 14 having the same length as the cylindrical portion 6 in the axial direction X, and both ends 18 and 19 in the axial direction X in the radial direction Y than the cylindrical outer surfaces 3 and 10. While located inward, between both ends 18 and 19 in the axial direction X Has a curved convex outer surface 20 positioned outward in the radial direction Y from the cylindrical outer surfaces 3 and 10, and a curved concave inner surface 21 that is curved in a complementary manner corresponding to the curved convex outer surface 20 and has a shaft.
- the bulging portion 22 disposed between the cylindrical portions 6 and 14 in the direction X and the one end portion 25 in the axial direction X of the cylindrical portion 6 extend outward in the radial direction Y so as to be integrated with the one end portion 25. It is provided with an annular collar 26 provided, and a slit 29 that allows the cylindrical portions 6 and 14 and the bulging portion 22 to be reduced in diameter.
- a curved concave inner surface 21 formed of a part of a spherical surface having a radius of curvature r3 is formed at an annular one end 35 in the axial direction X at an annular one end in the axial direction X of the cylindrical inner surface 2 and in an annular shape in the axial direction X.
- the other end 36 is directly connected to an annular one end of the cylindrical inner surface 9 in the axial direction X, and the curved convex outer surface 20 formed of a part of a spherical surface having a radius of curvature r4 is provided in the axial direction X.
- the annular one end 37 is indirectly connected to the annular one end 39 in the axial direction X of the cylindrical outer surface 3 via the annular step surface 38 in the axial direction X of the cylindrical portion 6, while in the axial direction.
- the other annular end 40 of X is indirectly connected to the annular one end 42 of the cylindrical outer surface 10 in the axial direction X via an annular step surface 41 in the axial direction X of the cylindrical portion 14,
- the slit 29 opens at the end surface 5 and the end surface 13 so as to divide the cylindrical portions 6 and 14 and the bulging portion 22 in the circumferential direction R around the axis O of the cylindrical portions 6 and 14.
- the slit part 52 provided in the annular collar part 29 is comprised so that it may divide
- the pedal device 61 provided with such a bearing bush 1 includes a cylindrical boss 62, and a pedal arm 65 fixed to the cylindrical outer surface 63 of the boss 62 at one end 64.
- And 70 have side walls 71 and 72 fixed by crimping, and further include pedal brackets 73 and 74 fixed to the dash panel of the vehicle body.
- the bearing bush 1 is disposed on each of the side walls 71 and 72, and the bearing bush 1 on the side wall 71 side is annular between the curved concave inner surface 21 and the cylindrical outer surface 81 of the shaft member 68. While forming the void 82, the cylindrical inner surfaces 2 and 9 are brought into contact with the outer surface 81, respectively, and at least a part of the curved convex outer surface 20 is brought into contact with the cylindrical inner surface 83 of the boss 62.
- the cylindrical portion 6 and 14 and the bulging portion 22 are arranged between the boss 62 and the shaft member 68 by bringing the portion 26 into contact with the side wall 71, and the bearing bush 1 on the side wall 72 side is also the bearing bush 1 on the side wall 71 side. Similarly, the cylindrical portions 6 and 14 and the bulging portion 22 are arranged between the boss 62 and the shaft member 68.
- the cylindrical inner surfaces 2 and 9 can be reduced in diameter with respect to a bearing gap (backlash) determined by the diameter defined by the cylindrical inner surfaces 2 and 9 and the diameter defined by the outer surface 81.
- a bearing gap backlash
- the curved convex outer surface 20 is in contact with the inner surface 83 so as to form an annular space 82, it is always maintained at an appropriate value, and generation of abnormal noise due to the bearing gap is prevented.
- the curved convex outer surface 20 is elastically deformed, and the load is applied to the curved convex outer surface 20 and the curved convex outer surface 20.
- the bearing clearance is set to an appropriate value. While the annular cavity 82 is also maintained, the shaft An increase in the sliding resistance between the bush 1 and the shaft member 68 can be prevented.
- the slit 29 opens in the end face 5 and the end face 13 in addition to the slit portion 52 and extends in the axial direction X from the end face 5 to the end face 13 in parallel to the axial line O.
- the slit parts 51 provided in the shape parts 6 and 14 and the bulging part 22 are provided, instead of this, the slit 29 is cylindrical in the circumferential direction R as shown in FIGS. In order to divide the parts 6 and 14 and the bulging part 22, it opens at the end face 5 and the end face 13, and has an inclination with respect to the axial direction X with an angle ⁇ of 30 °, for example, from the end face 5 to the end face 13.
- the annular flange portion 29 communicates with the slit portion 91 so as to divide the slit portion 91 provided in the cylindrical portions 6 and 14 and the bulging portion 22 and the annular flange portion 26 in the circumferential direction R. Slip provided And a central portion 92.
- each slit 29 shown in FIG.1 and FIG.2 and FIG.5 and FIG.6 may be sufficient, and the slit 29 shown in FIG.7 and FIG.8 opens in the end surface 5.
- the cylindrical portion 6 and the bulging portion 22 extend in the axial direction X in parallel with the axis O from the end surface 5 to the front of the end surface 13, and the cylindrical portion 6 and the bulging portion are part of the cylindrical portion 14 22 and at least one part of the cylindrical portion 14 provided so as to be divided in the circumferential direction R, in this example, three slit portions 95 and an opening at the end surface 13 and a front side of the end surface 13 to the end surface 5
- the cylindrical portion 14 and the bulging portion 22 and a part of the cylindrical portion 6 extend in parallel with the slit portion 95, and the cylindrical portion 14 and the bulging portion 22 and a part of the cylindrical portion 6 are circumferentially arranged.
- At least one provided to divide into R there are provided three slit portions 96 and three slit portions 97 provided in the annular flange portion 26 so as to communicate with the slit portion 95 so as to divide the annular flange portion 26 into three in the circumferential direction R.
- the slit portions 95 and 97 and the slit portion 96 are alternately arranged in the circumferential direction R at equal angular intervals.
- the pedal device 61 shown in FIGS. 3 and 4 is used.
- the bearing gap can be maintained at an appropriate value at all times, and the generation of noise caused by the bearing gap can be prevented.
- an excessive load acts on the bearing bush 1 in the radial direction Y and the curved convex outer surface.
- the thickness of the bulging portion 22 is constant as t, but for example, the thickness t gradually increases from the center portion between the end portions 18 and 19 in the axial direction X to both end portions 18 and 19.
- the bulging portion 22 may be formed, and the curved convex outer surface 20 and the curved concave inner surface 21 may be formed of spheroid surfaces having different curvatures.
- the entire curved convex outer surface 20 is composed of a part of a spherical surface having a radius of curvature r3 convex outward in the radial direction Y.
- the curved convex outer surface 20 is connected to each of the stepped surfaces 38 and 41 and has a pair of annular curved outer surfaces 101 and 102 convex inward in the radial direction Y, and the curved outer surface 101 and 102 in the axial direction X.
- a curved outer surface 103 which is arranged between 102 and is connected to each of the curved outer surfaces 101 and 102 and which is formed of a part of a spherical surface having a radius of curvature r4 and is convex outward in the radial direction Y.
- the outer surfaces instead of the outer surfaces of the pair of annular curved outer surfaces 101 and 102 that protrude inward in the radial direction Y, the outer surfaces may be frustoconical surfaces, respectively.
- the entire curved concave inner surface 21 is also represented in the radial direction Y in the above.
- the curved concave inner surface 21 is connected to the cylindrical inner surfaces 2 and 9, respectively, as shown in FIG.
- a curved inner surface 113 formed of a part of a spherical surface having a radius of curvature r3 corresponding to the curved outer surface 103 and projecting outward in the radial direction Y may be provided.
- the inner surfaces of the pair of annular curved inner surfaces 111 and 112 projecting inward in the radial direction Y they may be inner surfaces made of frustoconical surfaces, respectively.
- Corners respectively of the connecting portion of a fine curved inner surface 9 and the curved inner surface 112 can not cause.
- the bulging portion 22 having the curved convex outer surface 20 and the curved concave inner surface 21 as shown in FIG. 9 generally has a thickness t thinner than the thickness T of the cylindrical portions 6 and 14. It is good to have.
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- Sliding-Contact Bearings (AREA)
Abstract
A bearing bush 1 comprises: a cylindrical part 6 having a cylindrical inner surface 2 and a cylindrical outer surface 3; a cylindrical part 14 having a cylindrical inner surface 9 and a cylindrical outer surface 10; a bulging part 22 that has a curved protruding outer surface 20 positioned more inward in a radial direction Y than the cylindrical outer surfaces 3, 10 at both ends 18, 19 in an axial direction X and positioned more outward in the radial direction Y than the cylindrical outer surfaces 3, 10 between both ends 18, 19 in the axial direction X, and that has a curved recessed inner surface 21 that is curved corresponding complementarily to the curved protruding outer surface 20; and a slit 29 that enables the cylindrical parts 6, 14 and the bulging part 22 to be decreased in diameter.
Description
本発明は、軸受ブッシュ及びこの軸受ブッシュを備えたペダル装置に関する。
The present invention relates to a bearing bush and a pedal device provided with the bearing bush.
一般に、自動車のブレーキペダル又はクラッチペダルは、車体部材、例えばダッシュパネルに固定されたペダルブラケットに支持された軸部材に円筒状のボスを介して回転自在に支持されている。
Generally, an automobile brake pedal or clutch pedal is rotatably supported by a vehicle body member, for example, a shaft member supported by a pedal bracket fixed to a dash panel via a cylindrical boss.
そして、ペダルブラケットと軸部材との枢支構造を有する従来のペダル装置では、外周面にペダルアームを固定したボスに、夫々一方の端部に鍔部を有した合成樹脂製の軸受ブッシュが鍔部の裏面をボスの端面に当接させて圧入嵌合されており、軸受ブッシュ内には所定のクリアランス（軸受隙間）をもってボルトからなる軸部材が挿入されており、軸部材はナットによりペダルブラケット間に締結固定されている。
In a conventional pedal device having a pivotal support structure of a pedal bracket and a shaft member, a synthetic resin bearing bush having a flange portion at one end portion is provided on a boss having a pedal arm fixed to the outer peripheral surface. A shaft member made of bolts is inserted into the bearing bush with a predetermined clearance (bearing clearance), and the shaft member is a pedal bracket by a nut. Fastened and fixed between.
斯かるペダル装置では、ペダルアームの回転を円滑に行わせるために、ペダルブラケットと軸受ブッシュとの間に軸方向の隙間を設けているが、この隙間はペダルアームの軸方向のガタとなるため、このガタに起因するペダルアームの振動で、運転者に伝達される異音（コツコツ音）が発生し、また、斯かるガタに起因してペダルパッドで横揺れが生じる虞があり、いずれにしても、自動車の操作フィーリングを低下させるという問題がある。
In such a pedal device, an axial gap is provided between the pedal bracket and the bearing bush in order to smoothly rotate the pedal arm, but this gap becomes an axial backlash of the pedal arm. In addition, the vibration of the pedal arm caused by the rattle may cause an abnormal noise transmitted to the driver, and there is a risk that the pedal pad may roll due to the rattle. However, there is a problem that the operational feeling of the automobile is lowered.
斯かる問題を解消すべく、ペダルブラケットと軸受ブッシュとの間の隙間を小さくすると、ペダルブラケットと軸受ブッシュとの間の摺動抵抗が大きくなって、ペダルアームの戻りが不良となり、かえって自動車の操作フィーリングを低下させる虞がある。
If the gap between the pedal bracket and the bearing bush is reduced to eliminate such a problem, the sliding resistance between the pedal bracket and the bearing bush will increase, resulting in poor return of the pedal arm. There is a risk of lowering the operational feeling.
また、ペダル装置では、自動車の操作フィーリングを向上させるために、軸受ブッシュの内径と軸部材の外径との寸法公差を極力小さくして軸受ブッシュと軸部材との径方向のガタ（軸受隙間）を最小限にすることが要求されるが、斯かる径方向のガタを小さくすると、軸受ブッシュと軸部材との間の摺動抵抗が大きくなって、上記と同様に、ペダルアームの戻りが不良となり、同じく操作フィーリングを低下させる虞がある。
In the pedal device, in order to improve the operational feeling of the automobile, the dimensional tolerance between the inner diameter of the bearing bush and the outer diameter of the shaft member is made as small as possible to reduce the radial play (bearing clearance) between the bearing bush and the shaft member. ) Is required to be minimized, but if such radial play is reduced, the sliding resistance between the bearing bush and the shaft member increases, and the pedal arm returns as described above. There is a risk that the operation feeling will be lowered as well.
特許文献１には、ペダルブラケットに枢着されているペダルアーム及びボスの外周面にガイド部材を設け、ガイド部材とペダルブラケットとの間にブッシュを介装して、ペダルアームの横揺れを減少させ、ペダルアームの操作フィーリングを向上させる技術が記載されており、特許文献２には、支点ピン（軸部材）の端部に、プッシュプレートナットを嵌挿固定し、支点ピンに嵌挿されたプッシュプレートナットで支点ピンの軸方向抜け止めを行うとともに、支点ピンに所定の押し付け力を発揮させて、ガタを発生させることなくペダルアームの円滑な回転を確保する技術が記載されている。
In Patent Document 1, a guide member is provided on the outer peripheral surface of a pedal arm and a boss pivotally attached to a pedal bracket, and a bush is interposed between the guide member and the pedal bracket to reduce the roll of the pedal arm. And a technique for improving the operational feeling of the pedal arm is described, and in Patent Document 2, a push plate nut is fitted and fixed to the end of a fulcrum pin (shaft member), and is inserted into the fulcrum pin. Further, there is described a technique for preventing the fulcrum pin from coming off in the axial direction with the push plate nut and ensuring a smooth rotation of the pedal arm without causing play by causing the fulcrum pin to exert a predetermined pressing force.
ところで、特許文献１及び特許文献２に記載された技術は、いずれもペダルアームの横揺れを防止する技術であり、軸受ブッシュと軸部材との寸法公差による径方向のガタに起因する操作フィーリングの低下に加えて、異音の発生防止については考慮されていない。
By the way, the techniques described in Patent Document 1 and Patent Document 2 are both techniques for preventing the swing of the pedal arm, and an operation feeling due to radial play due to a dimensional tolerance between the bearing bush and the shaft member. In addition to the decrease in noise, no consideration is given to the prevention of abnormal noise.
本発明は上記諸点に鑑みてなされたものであり、その目的とするところは、径方向のガタに起因する操作フィーリングの低下及び異音の発生を防止できる軸受ブッシュ及びこの軸受ブッシュを備えたペダル装置を提供することにある。
The present invention has been made in view of the above-described points, and an object of the present invention is to provide a bearing bush capable of preventing a decrease in operation feeling and noise due to radial play, and the bearing bush. The object is to provide a pedal device.
本発明の軸受ブッシュは、一方の円筒状内面及び円筒状外面を有する一方の円筒状部と、一方の円筒状内面と同径の他方の円筒状内面に加えて他方の円筒状外面を有する他方の円筒状部と、軸方向の両端部では一方及び他方の円筒状外面よりも径方向の内方に位置している一方、軸方向の当該両端部間では一方及び他方の円筒状外面よりも径方向の外方に位置した湾曲状凸外面及び一方及び他方の円筒状内面よりも径方向の外方に位置した湾曲状凹内面を有していると共に軸方向における一方及び他方の円筒状部間に配された膨出部と、一方の円筒状部の軸方向の一端部から径方向外方に伸びて当該一端部に一体的に設けられた円環状鍔部と、一方及び他方の円筒状部並びに膨出部を縮径自在とするスリットとを具備している。
The bearing bush of the present invention has one cylindrical portion having one cylindrical inner surface and a cylindrical outer surface, and the other cylindrical inner surface in addition to the other cylindrical inner surface having the same diameter as the one cylindrical inner surface. And both ends in the axial direction are positioned more radially inward than the one and the other cylindrical outer surface, while between the both ends in the axial direction than the one and the other cylindrical outer surface. A curved convex outer surface positioned radially outward and a curved concave inner surface positioned radially outward than one and the other cylindrical inner surface, and one and the other cylindrical portion in the axial direction A bulging portion disposed between them, an annular flange portion extending radially outward from one axial end portion of one cylindrical portion, and integrally provided at the one end portion, and one and the other cylinder And a slit that allows the diameter-shaped portion and the bulging portion to be reduced in diameter.
本発明の軸受ブッシュによれば、軸部材の外面に接触させられる一方及び他方の円筒状内面を有した一方及び他方の円筒状部並びにペダル装置のボスの内面に接触させられる湾曲状凸外面を有した膨出部がスリットによって縮径自在となっているので、当該膨出部を軸方向において挟んで設けられた一方及び他方の円筒状部の一方及び他方の円筒状内面の内径寸法とペダル装置の軸部材の外径寸法との寸法公差によって決定される軸受隙間（ガタ）を吸収でき、軸受隙間に起因する径方向のガタによるペダル装置の操作フィーリングの低下及び異音の発生を防止できる。
According to the bearing bush of the present invention, the curved convex outer surface that is brought into contact with the inner surface of the boss of the pedal device and the one and the other cylindrical portions having the one and the other cylindrical inner surface that are brought into contact with the outer surface of the shaft member. Since the bulged portion has a diameter that can be reduced by the slit, the inner diameter dimension of one and the other cylindrical inner surface of one and the other cylindrical portion provided with the bulged portion sandwiched in the axial direction and the pedal The bearing clearance (backlash) determined by the dimensional tolerance with the outer diameter of the shaft member of the device can be absorbed, and the deterioration of the operation feeling of the pedal device and the generation of noise due to the radial backlash caused by the bearing clearance are prevented. it can.
本発明の軸受ブッシュにおいて、一方及び他方の円筒状部は、軸方向において互いに同一の長さを有していてもよいが、これに代えて、軸方向において異なる長さを有していてもよく、一方及び他方の円筒状部が軸方向において互いに異なる長さを有している場合、膨出部は、一方又は他方の円筒状部側に偏って配されることになり、また、一方及び他方の円筒状外面は、好ましい例では、互いに同一の径を有しているが、互いに異なる径を有していてもよく、要は、一方及び他方の円筒状部が挿入されるボスの内周面の径より小さく、夫々とボスの内周面との間に円環状の隙間を形成する径を有していればよい。
In the bearing bush of the present invention, the one and the other cylindrical portions may have the same length in the axial direction, but may alternatively have different lengths in the axial direction. Well, when the one and the other cylindrical parts have different lengths in the axial direction, the bulging part will be biased to the one or the other cylindrical part side, In the preferred example, the other cylindrical outer surfaces have the same diameter, but may have different diameters. In short, the boss into which the one and the other cylindrical parts are inserted is used. What is necessary is just to have a diameter which is smaller than the diameter of an internal peripheral surface, and forms an annular | circular gap between each and the internal peripheral surface of a boss | hub.
本発明において、湾曲状凸外面及び湾曲状凹内面の夫々は、好ましい例では、同心の球面又は回転楕円体面の一部からなるが、本発明は、これに限定されず、要は、湾曲状凸外面は、一方及び他方の円筒状外面よりも径方向の外方に位置した連続な全体として凸に湾曲した面からなっていればよく、湾曲状凹内面もまた、湾曲状凸外面に対応して連続な全体として凹に湾曲した面からなっていればよい。
In the present invention, each of the curved convex outer surface and the curved concave inner surface is composed of a part of a concentric spherical surface or spheroid surface in a preferred example, but the present invention is not limited to this, The convex outer surface only needs to be a continuous convexly curved surface located radially outward from one and the other cylindrical outer surface, and the curved concave inner surface also corresponds to the curved convex outer surface. Thus, it is only necessary that the entire surface is formed of a concavely curved surface.
本発明において、スリットは、一方及び他方の円筒状部の軸心線を中心とした円周方向において一方及び他方の円筒状部並びに膨出部を分断するように、一方及び他方の円筒状部の端面で夫々開口すると共に一方の円筒状部の端面から他方の円筒状部の端面まで軸心線に平行に軸方向に伸びて又は軸心線に一定の角度をもって軸方向に対して傾きをもって伸びて一方及び他方の円筒状部並びに膨出部に設けられた第一のスリット部と、円環状鍔部を円周方向Ｒに分断するように、第一のスリット部と連通して円環状鍔部に設けられた第二のスリット部とを具備していても、これらに代えて、一方の円筒状部の端面で開口すると共に一方の円筒状部の端面から他方の円筒状部の端面の手前まで軸心線に平行に軸方向に伸びて又は軸心線に一定の角度をもって軸方向に対して傾きをもって伸びて少なくとも一方の円筒状部及び膨出部に、当該少なくとも一方の円筒状部及び膨出部を円周方向Ｒに分断するようにして設けられた少なくとも一つの第一のスリット部と、他方の円筒状部の端面で開口すると共に他方の円筒状部の端面から一方の円筒状部の端面の手前まで第一のスリット部と平行に伸びて少なくとも他方の円筒状部及び膨出部に、当該少なくとも他方の円筒状部及び膨出部を円周方向Ｒに分断するようにして設けられた少なくとも一つの第二のスリット部と、円環状鍔部を円周方向Ｒに分断するように、第一のスリット部と連通して円環状鍔部に設けられた第三のスリット部とを具備していてもよい。
In the present invention, the slits are arranged so that the one and the other cylindrical portions are divided so as to divide the one and the other cylindrical portions and the bulging portion in the circumferential direction around the axial center line of the one and the other cylindrical portions. And open from the end face of one cylindrical portion to the end face of the other cylindrical portion in the axial direction parallel to the axial line or inclined at a certain angle to the axial line. An annular ring that communicates with the first slit portion so as to divide the first slit portion provided in one and the other cylindrical portion and the bulging portion and the annular flange portion in the circumferential direction R. Even if it has the 2nd slit part provided in the collar part, it will replace with these, and it will open at the end surface of one cylindrical part, and will be the end surface of the other cylindrical part from the end surface of one cylindrical part It extends in the axial direction parallel to the axial center line up to the front of or is constant to the axial center line At least one of the cylindrical portion and the bulging portion that extends at an angle with respect to the axial direction at an angle so as to divide the at least one cylindrical portion and the bulging portion in the circumferential direction R. One first slit portion and an opening at the end surface of the other cylindrical portion, and extends in parallel with the first slit portion from the end surface of the other cylindrical portion to the front of the end surface of one cylindrical portion. At least one second slit portion provided on the cylindrical portion and the bulging portion so as to divide the at least the other cylindrical portion and the bulging portion in the circumferential direction R, and an annular flange portion are circular. You may comprise the 3rd slit part provided in the annular | circular shaped collar part in communication with the 1st slit part so that it may cut | disconnect in the circumferential direction R.
本発明において、一方及び他方の円筒状部、膨出部並びに円環状鍔部を含む軸受ブッシュは、ポリアセタール樹脂、ポリアミド樹脂又はポリエステル樹脂等の合成樹脂から一体形成されていてもよく、また、銅若しくは銅合金又はアルミニウム若しくはアルミニウム合金等の非鉄金属板又はステンレス鋼板から一体形成されていてもよく、更には、鋼薄板と鋼薄板上に一体的に形成された多孔質金属焼結層と多孔質金属焼結層に充填被覆された合成樹脂層とを具備した複層板から一体形成されていてもよい。
In the present invention, the bearing bush including one and the other cylindrical portion, the bulging portion, and the annular flange portion may be integrally formed from a synthetic resin such as polyacetal resin, polyamide resin, or polyester resin. Or it may be integrally formed from a non-ferrous metal plate such as copper alloy or aluminum or aluminum alloy, or a stainless steel plate, and further, a steel sheet and a porous sintered metal layer formed integrally on the steel sheet and a porous material You may integrally form from the multilayer board which comprised the synthetic resin layer by which the metal sintered layer was filled and coat | covered.
本発明のペダル装置は、円筒状のボスと、このボスに固定されたペダルアームと、ボス内に当該ボスに対して相対回転可能に配された軸部材と、この軸部材の両端が固定されたペダルブラケットと、湾曲状凹内面及び軸部材の外面間に環状空所を形成する一方、湾曲状凸外面の少なくとも一部をボスの内面に接触させるようにして、ボス及び軸部材間に一方及び他方の円筒状部並びに膨出部を配してなる上記の軸受ブッシュとを備えている。
The pedal device of the present invention includes a cylindrical boss, a pedal arm fixed to the boss, a shaft member disposed in the boss so as to be rotatable relative to the boss, and both ends of the shaft member are fixed. An annular space is formed between the pedal bracket and the curved concave inner surface and the outer surface of the shaft member, while at least part of the curved convex outer surface is brought into contact with the inner surface of the boss, And the above-mentioned bearing bush formed by arranging the other cylindrical portion and the bulging portion.
本発明のペダル装置によれば、軸受ブッシュの一方及び他方の円筒状部の円筒状内面の内径寸法と軸部材の外径寸法とによって決定される軸受隙間（ガタ）は、膨出部が縮径自在となっている上に、湾曲状凸外面の少なくとも一部がボスの内面に接触されているので、常時適正な値に維持され、当該軸受隙間に起因する異音の発生は防止される。
According to the pedal device of the present invention, in the bearing gap (backlash) determined by the inner diameter size of the cylindrical inner surface of one and the other cylindrical portions of the bearing bush and the outer diameter size of the shaft member, the bulging portion is reduced. In addition to being freely adjustable, at least a part of the curved convex outer surface is in contact with the inner surface of the boss, so that it is always maintained at an appropriate value and the generation of abnormal noise due to the bearing gap is prevented. .
本発明によれば、径方向のガタに起因する操作フィーリングの低下及び異音の発生を防止できる軸受ブッシュ及びこの軸受ブッシュを備えたペダル装置を提供することができる。
According to the present invention, it is possible to provide a bearing bush that can prevent a decrease in operation feeling and abnormal noise caused by radial play, and a pedal device including the bearing bush.
次に、本発明及びその実施の形態を、図に示す好ましい具体例に基づいて更に詳細に説明する。なお、本発明はこれらの具体例に何等限定されないのである。
Next, the present invention and its embodiments will be described in more detail based on preferred specific examples shown in the drawings. The present invention is not limited to these specific examples.
図１及び図２において、本例の軸受ブッシュ１は、円筒状内面２、円筒状外面３、円筒状内面２に直接に連接した円環状のテーパ面４及びテーパ面４に直接に連接した軸方向Ｘの円環状の端面５を有する円筒状部６と、円筒状内面２の径ｒ１と同径の円筒状内面９に加えて円筒状外面３の径ｒ２と同径の円筒状外面１０、円筒状内面９に直接に連接した円環状のテーパ面１１、円筒状外面１０に直接に連接した円環状のテーパ面１２並びにテーパ面１１及び１２の夫々に直接に連接した軸方向Ｘの円環状の端面１３を有すると共に軸方向Ｘにおいて円筒状部６と同一の長さを有した円筒状部１４と、軸方向Ｘの両端部１８及び１９では円筒状外面３及び１０よりも径方向Ｙの内方に位置している一方、軸方向Ｘの当該両端部１８及び１９間では円筒状外面３及び１０よりも径方向Ｙの外方に位置した湾曲状凸外面２０及び湾曲状凸外面２０に相補的に対応して湾曲した湾曲状凹内面２１を有していると共に軸方向Ｘにおける円筒状部６及び１４間に配された膨出部２２と、円筒状部６の軸方向Ｘの一端部２５から径方向Ｙの外方に伸びて当該一端部２５に一体的に設けられた円環状鍔部２６と、円筒状部６及び１４並びに膨出部２２を縮径自在とするスリット２９とを具備している。
1 and 2, a bearing bush 1 of this example includes a cylindrical inner surface 2, a cylindrical outer surface 3, an annular tapered surface 4 directly connected to the cylindrical inner surface 2, and a shaft directly connected to the tapered surface 4. A cylindrical portion 6 having an annular end surface 5 in the direction X, and a cylindrical inner surface 10 having the same diameter as the diameter r2 of the cylindrical outer surface 3 in addition to the cylindrical inner surface 9 having the same diameter as the diameter r1 of the cylindrical inner surface 2; An annular tapered surface 11 directly connected to the cylindrical inner surface 9, an annular tapered surface 12 directly connected to the cylindrical outer surface 10, and an axial X ring connected directly to each of the tapered surfaces 11 and 12. The cylindrical portion 14 having the same length as the cylindrical portion 6 in the axial direction X, and both ends 18 and 19 in the axial direction X in the radial direction Y than the cylindrical outer surfaces 3 and 10. While located inward, between both ends 18 and 19 in the axial direction X Has a curved convex outer surface 20 positioned outward in the radial direction Y from the cylindrical outer surfaces 3 and 10, and a curved concave inner surface 21 that is curved in a complementary manner corresponding to the curved convex outer surface 20 and has a shaft. The bulging portion 22 disposed between the cylindrical portions 6 and 14 in the direction X and the one end portion 25 in the axial direction X of the cylindrical portion 6 extend outward in the radial direction Y so as to be integrated with the one end portion 25. It is provided with an annular collar 26 provided, and a slit 29 that allows the cylindrical portions 6 and 14 and the bulging portion 22 to be reduced in diameter.
曲率半径ｒ３を有した球面の一部からなる湾曲状凹内面２１は、軸方向Ｘの円環状の一端３５では円筒状内面２の軸方向Ｘの円環状の一端に、軸方向Ｘの円環状の他端３６では円筒状内面９の軸方向Ｘの円環状の一端に夫々直接に連接されており、曲率半径ｒ４を有した球面の一部からなる湾曲状凸外面２０は、軸方向Ｘの円環状の一端３７では円筒状部６の軸方向Ｘの円環状の段差面３８を介して円筒状外面３の軸方向Ｘの円環状の一端３９に間接的に連接している一方、軸方向Ｘの円環状の他端４０では円筒状部１４の軸方向Ｘの円環状の段差面４１を介して円筒状外面１０の軸方向Ｘの円環状の一端４２に間接的に連接しており、円筒状部６及び１４の厚み(肉厚）Ｔ（＝（ｒ２－ｒ１）／２）よりも薄い膨出部２２の厚み（肉厚）をｔ（＜Ｔ）とすると、曲率半径ｒ４は、曲率半径ｒ３に厚みｔを加えた値（ｒ４＝ｒ３＋ｔ）となっている。
A curved concave inner surface 21 formed of a part of a spherical surface having a radius of curvature r3 is formed at an annular one end 35 in the axial direction X at an annular one end in the axial direction X of the cylindrical inner surface 2 and in an annular shape in the axial direction X. The other end 36 is directly connected to an annular one end of the cylindrical inner surface 9 in the axial direction X, and the curved convex outer surface 20 formed of a part of a spherical surface having a radius of curvature r4 is provided in the axial direction X. The annular one end 37 is indirectly connected to the annular one end 39 in the axial direction X of the cylindrical outer surface 3 via the annular step surface 38 in the axial direction X of the cylindrical portion 6, while in the axial direction. The other annular end 40 of X is indirectly connected to the annular one end 42 of the cylindrical outer surface 10 in the axial direction X via an annular step surface 41 in the axial direction X of the cylindrical portion 14, The thickness (thickness) of the bulging portion 22 is thinner than the thickness (thickness) T (= (r2-r1) / 2) of the cylindrical portions 6 and 14. If t (<T), the curvature radius r4 is a value obtained by adding the thickness t to the curvature radius r3 (r4 = r3 + t).
スリット２９は、円筒状部６及び１４の軸心線Ｏを中心とした円周方向Ｒにおいて円筒状部６及び１４並びに膨出部２２を分断するように、端面５及び端面１３で開口すると共に端面５から端面１３まで軸心線Ｏに平行に軸方向Ｘに伸びて円筒状部６及び１４並びに膨出部２２に設けられたスリット部５１と、円環状鍔部２６を円周方向Ｒに分断するように、スリット部５１と連通して円環状鍔部２９に設けられたスリット部５２とを具備している。
The slit 29 opens at the end surface 5 and the end surface 13 so as to divide the cylindrical portions 6 and 14 and the bulging portion 22 in the circumferential direction R around the axis O of the cylindrical portions 6 and 14. A slit portion 51 provided in the cylindrical portions 6 and 14 and the bulging portion 22 extending in the axial direction X parallel to the axis O from the end surface 5 to the end surface 13 and the annular flange portion 26 in the circumferential direction R. The slit part 52 provided in the annular collar part 29 is comprised so that it may divide | segment and communicate with the slit part 51. FIG.
斯かる軸受ブッシュ１を具備したペダル装置６１は、図３及び図４に示すように、円筒状のボス６２と、ボス６２の円筒状の外面６３に一端６４で固定されているペダルアーム６５と、ペダルアーム６５の他端６６に取付けられたペダル６７と、ボス６２内に当該ボス６２に対して円周方向Ｒに相対回転可能に配されている軸部材６８と、軸部材６８の両端６９及び７０がカシメ固定されている側壁７１及び７２を有すると共に車体のダッシュパネルに固定されたペダルブラケット７３及び７４とを更に具備している。
As shown in FIGS. 3 and 4, the pedal device 61 provided with such a bearing bush 1 includes a cylindrical boss 62, and a pedal arm 65 fixed to the cylindrical outer surface 63 of the boss 62 at one end 64. A pedal 67 attached to the other end 66 of the pedal arm 65, a shaft member 68 disposed in the boss 62 so as to be rotatable relative to the boss 62 in the circumferential direction R, and both ends 69 of the shaft member 68. And 70 have side walls 71 and 72 fixed by crimping, and further include pedal brackets 73 and 74 fixed to the dash panel of the vehicle body.
ペダル装置６１において、軸受ブッシュ１は、側壁７１及び７２側の夫々に配されており、側壁７１側の軸受ブッシュ１は、湾曲状凹内面２１及び軸部材６８の円筒状の外面８１間に環状空所８２を形成するようにして、円筒状内面２及び９を夫々外面８１に接触させると共に湾曲状凸外面２０の少なくとも一部をボス６２の円筒状の内面８３に接触させる一方、円環状鍔部２６を側壁７１に接触させてボス６２及び軸部材６８間に円筒状部６及び１４並びに膨出部２２を配してなり、側壁７２側の軸受ブッシュ１も、側壁７１側の軸受ブッシュ１と同様にして、ボス６２及び軸部材６８間に円筒状部６及び１４並びに膨出部２２を配してなる。
In the pedal device 61, the bearing bush 1 is disposed on each of the side walls 71 and 72, and the bearing bush 1 on the side wall 71 side is annular between the curved concave inner surface 21 and the cylindrical outer surface 81 of the shaft member 68. While forming the void 82, the cylindrical inner surfaces 2 and 9 are brought into contact with the outer surface 81, respectively, and at least a part of the curved convex outer surface 20 is brought into contact with the cylindrical inner surface 83 of the boss 62. The cylindrical portion 6 and 14 and the bulging portion 22 are arranged between the boss 62 and the shaft member 68 by bringing the portion 26 into contact with the side wall 71, and the bearing bush 1 on the side wall 72 side is also the bearing bush 1 on the side wall 71 side. Similarly, the cylindrical portions 6 and 14 and the bulging portion 22 are arranged between the boss 62 and the shaft member 68.
以上のペダル装置６１では、円筒状内面２及び９で規定される径と外面８１で規定される径によって決定される軸受隙間（ガタ）は、円筒状内面２及び９が縮径自在となっている上に、環状空所８２を形成するようにして、湾曲状凸外面２０が内面８３に接触されているので、常時適正な値に維持され、当該軸受隙間に起因する異音の発生は防止される上に、径方向Ｙに過度の荷重が軸受ブッシュ１に作用した場合は、湾曲状凸外面２０が弾性変形して、斯かる荷重を湾曲状凸外面２０と該湾曲状凸外面２０を軸方向Ｘにおいて挟む膨出部２２の厚みｔより厚い厚みＴを有する一対の円筒状部６及び円筒状部１４のそれぞれの円筒状外面３及び１０とで受け止めるので、軸受隙間は適正な値に維持される一方、環状空所８２も維持され、軸受ブッシュ１と軸部材６８との間の摺動抵抗の増大を防止することができる。
In the pedal device 61 described above, the cylindrical inner surfaces 2 and 9 can be reduced in diameter with respect to a bearing gap (backlash) determined by the diameter defined by the cylindrical inner surfaces 2 and 9 and the diameter defined by the outer surface 81. In addition, since the curved convex outer surface 20 is in contact with the inner surface 83 so as to form an annular space 82, it is always maintained at an appropriate value, and generation of abnormal noise due to the bearing gap is prevented. In addition, when an excessive load is applied to the bearing bush 1 in the radial direction Y, the curved convex outer surface 20 is elastically deformed, and the load is applied to the curved convex outer surface 20 and the curved convex outer surface 20. Since the bearings are received by the cylindrical outer surfaces 3 and 10 of the pair of cylindrical portions 6 and 14 having a thickness T larger than the thickness t of the bulging portion 22 sandwiched in the axial direction X, the bearing clearance is set to an appropriate value. While the annular cavity 82 is also maintained, the shaft An increase in the sliding resistance between the bush 1 and the shaft member 68 can be prevented.
ところで、上記の軸受ブッシュ１においては、スリット２９は、スリット部５２に加えて、端面５及び端面１３で開口すると共に端面５から端面１３まで軸心線Ｏに平行に軸方向Ｘに伸びて円筒状部６及び１４並びに膨出部２２に設けられたスリット部５１を具備しているが、これに代えて、スリット２９は、図５及び図６に示すように、円周方向Ｒにおいて円筒状部６及び１４並びに膨出部２２を分断するように、端面５及び端面１３で開口すると共に端面５から端面１３まで軸心線Ｏに例えば３０°の角度αをもって軸方向Ｘに対して傾きをもって伸びて円筒状部６及び１４並びに膨出部２２に設けられたスリット部９１と、円環状鍔部２６を円周方向Ｒに分断するように、スリット部９１と連通して円環状鍔部２９に設けられたスリット部９２とを具備していてもよい。
By the way, in the bearing bush 1 described above, the slit 29 opens in the end face 5 and the end face 13 in addition to the slit portion 52 and extends in the axial direction X from the end face 5 to the end face 13 in parallel to the axial line O. Although the slit parts 51 provided in the shape parts 6 and 14 and the bulging part 22 are provided, instead of this, the slit 29 is cylindrical in the circumferential direction R as shown in FIGS. In order to divide the parts 6 and 14 and the bulging part 22, it opens at the end face 5 and the end face 13, and has an inclination with respect to the axial direction X with an angle α of 30 °, for example, from the end face 5 to the end face 13. The annular flange portion 29 communicates with the slit portion 91 so as to divide the slit portion 91 provided in the cylindrical portions 6 and 14 and the bulging portion 22 and the annular flange portion 26 in the circumferential direction R. Slip provided And a central portion 92.
また、図１及び図２並びに図５及び図６に示す各スリット２９に代えて、図７及び図８に示すスリット２９でもよく、図７及び図８に示すスリット２９は、端面５で開口すると共に端面５から端面１３の手前まで軸心線Ｏに平行に軸方向Ｘに伸びて円筒状部６及び膨出部２２並びに円筒状部１４の一部に、当該円筒状部６及び膨出部２２並びに円筒状部１４の一部を円周方向Ｒに分断するようにして設けられた少なくとも一つ、本例では三つのスリット部９５と、端面１３で開口すると共に端面１３から端面５の手前までスリット部９５と平行に伸びて円筒状部１４及び膨出部２２並びに円筒状部６の一部に、当該円筒状部１４及び膨出部２２並びに円筒状部６の一部を円周方向Ｒに分断するようにして設けられた少なくとも一つ、本例では三つのスリット部９６と、円環状鍔部２６を円周方向Ｒに三つに分断するように、スリット部９５と連通して円環状鍔部２６に設けられた三つスリット部９７とを具備していてもよく、スリット部９５及び９７とスリット部９６とは、円周方向Ｒに等角度間隔をもって交互に配されている。
Moreover, it replaces with each slit 29 shown in FIG.1 and FIG.2 and FIG.5 and FIG.6, and the slit 29 shown in FIG.7 and FIG.8 may be sufficient, and the slit 29 shown in FIG.7 and FIG.8 opens in the end surface 5. At the same time, the cylindrical portion 6 and the bulging portion 22 extend in the axial direction X in parallel with the axis O from the end surface 5 to the front of the end surface 13, and the cylindrical portion 6 and the bulging portion are part of the cylindrical portion 14 22 and at least one part of the cylindrical portion 14 provided so as to be divided in the circumferential direction R, in this example, three slit portions 95 and an opening at the end surface 13 and a front side of the end surface 13 to the end surface 5 The cylindrical portion 14 and the bulging portion 22 and a part of the cylindrical portion 6 extend in parallel with the slit portion 95, and the cylindrical portion 14 and the bulging portion 22 and a part of the cylindrical portion 6 are circumferentially arranged. At least one provided to divide into R, in this example There are provided three slit portions 96 and three slit portions 97 provided in the annular flange portion 26 so as to communicate with the slit portion 95 so as to divide the annular flange portion 26 into three in the circumferential direction R. The slit portions 95 and 97 and the slit portion 96 are alternately arranged in the circumferential direction R at equal angular intervals.
図３及び図４に示すペダル装置６１に図１及び図２に示す軸受ブッシュ１に代えて図５及び図６又は図７及び図８に示す軸受ブッシュ１を用いることにより、斯かるペダル装置６１においてもまた、軸受隙間を常時適正な値に維持でき、当該軸受隙間に起因する異音の発生を防止できる上に、径方向Ｙに過度の荷重が軸受ブッシュ１に作用して湾曲状凸外面２０が大きく弾性変形しても、当該荷重を湾曲状凸外面２０と湾曲状凸外面２０を軸方向Ｘに挟む膨出部２２の厚みｔより厚い厚みＴを有する一対の円筒状部６及び円筒状部１４のそれぞれの円筒状外面３及び１０とで受け止めるので、軸受隙間を適正な値に維持できる一方、環状空所８２をも維持できて、軸部材６８との間の摺動抵抗の増大を防止することができる。
By replacing the bearing bush 1 shown in FIGS. 1 and 2 with the bearing bush 1 shown in FIGS. 5 and 6 or FIGS. 7 and 8, the pedal device 61 shown in FIGS. 3 and 4 is used. In addition, the bearing gap can be maintained at an appropriate value at all times, and the generation of noise caused by the bearing gap can be prevented. In addition, an excessive load acts on the bearing bush 1 in the radial direction Y and the curved convex outer surface. A pair of cylindrical portions 6 and cylinders having a thickness T greater than the thickness t of the bulging portion 22 sandwiching the curved convex outer surface 20 and the curved convex outer surface 20 in the axial direction X even if the elastic deformation of the 20 is large. Since it is received by the respective cylindrical outer surfaces 3 and 10 of the cylindrical portion 14, the bearing clearance can be maintained at an appropriate value, while the annular void 82 can also be maintained, and the sliding resistance with the shaft member 68 is increased. Can be prevented.
更に、上記では、膨出部２２の厚みをｔとして一定としたが、例えば、軸方向Ｘにおける両端部１８及び１９間の中央部から両端部１８及び１９にかけて徐々に厚みｔが厚くなるように膨出部２２を形成してもよく、而して、湾曲状凸外面２０と湾曲状凹内面２１とは、互いに曲率の異なる回転楕円体面からなっていてもよい。
Furthermore, in the above description, the thickness of the bulging portion 22 is constant as t, but for example, the thickness t gradually increases from the center portion between the end portions 18 and 19 in the axial direction X to both end portions 18 and 19. The bulging portion 22 may be formed, and the curved convex outer surface 20 and the curved concave inner surface 21 may be formed of spheroid surfaces having different curvatures.
更にまた、上記では、湾曲状凸外面２０の全体は、径方向Ｙの外方に凸な曲率半径ｒ３を有した球面の一部からなるが、これに代えて、例えば図９に示すように、湾曲状凸外面２０は、段差面３８及び４１の夫々に夫々連接していると共に径方向Ｙの内方に凸な一対の環状の湾曲外面１０１及び１０２と、軸方向Ｘにおいて湾曲外面１０１及び１０２間に配されて湾曲外面１０１及び１０２の夫々に連接していると共に曲率半径ｒ４を有した球面の一部からなって径方向Ｙの外方に凸な湾曲外面１０３とを具備していてもよく、また、この場合、径方向Ｙの内方に凸な一対の環状の湾曲外面１０１及び１０２の夫々の外面に代えて、夫々截頭円錐面からなる外面であってもよく、一方、湾曲状凹内面２１の全体もまた、上記では、径方向Ｙに凸な曲率半径ｒ３を有した球面の一部からなるが、これに代えて、例えば図９に示すように、湾曲状凹内面２１は、円筒状内面２及び９の夫々に夫々連接していると共に湾曲外面１０１及び１０２に対応した径方向Ｙの内方に凸な一対の環状の湾曲内面１１１及び１１２と、軸方向Ｘにおいて湾曲内面１１１及び１１２間に配されて湾曲内面１１１及び１１２の夫々に連接していると共に湾曲外面１０３に対応した曲率半径ｒ３を有した球面の一部からなって径方向Ｙの外方に凸な湾曲内面１１３とを具備していてもよく、また、この場合にも、径方向Ｙの内方に凸な一対の環状の湾曲内面１１１及び１１２の夫々の内面に代えて、夫々截頭円錐面からなる内面であってもよく、図９に示す例では、円筒内面２と湾曲内面１１１との連接部及び湾曲内面９と湾曲内面１１２との連接部の夫々に角部を生じさせなくできる。なお、図９に示すような湾曲状凸外面２０及び湾曲状凹内面２１を有した膨出部２２でも、いずれも円筒状部６及び１４の厚みＴよりも薄い厚みｔを全体的に有しているとよい。
Furthermore, in the above description, the entire curved convex outer surface 20 is composed of a part of a spherical surface having a radius of curvature r3 convex outward in the radial direction Y. Instead, for example, as shown in FIG. The curved convex outer surface 20 is connected to each of the stepped surfaces 38 and 41 and has a pair of annular curved outer surfaces 101 and 102 convex inward in the radial direction Y, and the curved outer surface 101 and 102 in the axial direction X. A curved outer surface 103 which is arranged between 102 and is connected to each of the curved outer surfaces 101 and 102 and which is formed of a part of a spherical surface having a radius of curvature r4 and is convex outward in the radial direction Y. In this case, instead of the outer surfaces of the pair of annular curved outer surfaces 101 and 102 that protrude inward in the radial direction Y, the outer surfaces may be frustoconical surfaces, respectively, The entire curved concave inner surface 21 is also represented in the radial direction Y in the above. The curved concave inner surface 21 is connected to the cylindrical inner surfaces 2 and 9, respectively, as shown in FIG. 9, for example, instead of a part of a spherical surface having a convex radius of curvature r3. A pair of annular curved inner surfaces 111 and 112 projecting inward in the radial direction Y corresponding to the curved outer surfaces 101 and 102, and the curved inner surfaces 111 and 112 disposed between the curved inner surfaces 111 and 112 in the axial direction X, respectively. And a curved inner surface 113 formed of a part of a spherical surface having a radius of curvature r3 corresponding to the curved outer surface 103 and projecting outward in the radial direction Y may be provided. In addition, instead of the inner surfaces of the pair of annular curved inner surfaces 111 and 112 projecting inward in the radial direction Y, they may be inner surfaces made of frustoconical surfaces, respectively. In the example shown in FIG. Joint portion between cylindrical inner surface 2 and curved inner surface 111 Corners respectively of the connecting portion of a fine curved inner surface 9 and the curved inner surface 112 can not cause. Note that the bulging portion 22 having the curved convex outer surface 20 and the curved concave inner surface 21 as shown in FIG. 9 generally has a thickness t thinner than the thickness T of the cylindrical portions 6 and 14. It is good to have.
１ 軸受ブッシュ
２、９ 円筒状内面
３、１０ 円筒状外面
４、１１、１２ テーパ面
５、１３ 端面
６、１４ 円筒状部
１８、１９ 端部
２０ 湾曲状凸外面
２１ 湾曲状凹内面
２２ 膨出部
２５ 一端部
２６ 円環状鍔部
２９ スリット DESCRIPTION OFSYMBOLS 1 Bearing bush 2, 9 Cylindrical inner surface 3, 10 Cylindrical outer surface 4, 11, 12 Tapered surface 5, 13 End surface 6, 14 Cylindrical part 18, 19 End part 20 Curved convex outer surface 21 Curved concave inner surface 22 Swelling Part 25 One end part 26 Toroidal collar part 29 Slit
２、９ 円筒状内面
３、１０ 円筒状外面
４、１１、１２ テーパ面
５、１３ 端面
６、１４ 円筒状部
１８、１９ 端部
２０ 湾曲状凸外面
２１ 湾曲状凹内面
２２ 膨出部
２５ 一端部
２６ 円環状鍔部
２９ スリット DESCRIPTION OF
Claims (2)
- 一方の円筒状内面及び円筒状外面を有する一方の円筒状部と、一方の円筒状内面と同径の他方の円筒状内面に加えて他方の円筒状外面を有する他方の円筒状部と、軸方向の両端部では一方及び他方の円筒状外面よりも径方向の内方に位置している一方、軸方向の当該両端部間では一方及び他方の円筒状外面よりも径方向の外方に位置した湾曲状凸外面並びに一方及び他方の円筒状内面よりも径方向の外方に位置した湾曲状凹内面を有していると共に軸方向における一方及び他方の円筒状部間に配された膨出部と、一方の円筒状部の軸方向の一端部から径方向外方に伸びて当該一端部に一体的に設けられた円環状鍔部と、一方及び他方の円筒状部並びに膨出部を縮径自在とするスリットとを具備した軸受ブッシュ。 One cylindrical portion having one cylindrical inner surface and a cylindrical outer surface, and the other cylindrical portion having the other cylindrical outer surface in addition to the other cylindrical inner surface having the same diameter as the one cylindrical inner surface, and a shaft The two ends in the direction are positioned more radially inward than the one and the other cylindrical outer surfaces, while the two ends in the axial direction are positioned more radially outward than the one and the other cylindrical outer surfaces A curved convex outer surface and a curved concave inner surface positioned radially outward from the one and other cylindrical inner surfaces, and a bulge disposed between the one and the other cylindrical portions in the axial direction. An annular flange that extends radially outward from one axial end of one cylindrical portion and is provided integrally with the one end, and one and the other cylindrical portion and the bulging portion. A bearing bush provided with a slit that can be reduced in diameter.
- 円筒状のボスと、このボスに固定されたペダルアームと、ボス内に当該ボスに対して相対回転可能に配された軸部材と、この軸部材の両端が固定されたペダルブラケットと、湾曲状凹内面及び軸部材の外面間に環状空所を形成する一方、湾曲状凸外面の少なくとも一部をボスの内面に接触させるようにして、ボス及び軸部材間に一方及び他方の円筒状部並びに膨出部を配してなる請求項１に記載の軸受ブッシュとを備えているペダル装置。
A cylindrical boss, a pedal arm fixed to the boss, a shaft member disposed in the boss so as to be relatively rotatable with respect to the boss, a pedal bracket to which both ends of the shaft member are fixed, and a curved shape An annular space is formed between the concave inner surface and the outer surface of the shaft member, while at least a part of the curved convex outer surface is brought into contact with the inner surface of the boss, so that one and the other cylindrical portions between the boss and the shaft member and A pedal device comprising the bearing bush according to claim 1, wherein a bulging portion is provided.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/JP2017/004652 WO2018146759A1 (en) | 2017-02-08 | 2017-02-08 | Bearing bush and pedal device comprising same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/JP2017/004652 WO2018146759A1 (en) | 2017-02-08 | 2017-02-08 | Bearing bush and pedal device comprising same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2018146759A1 true WO2018146759A1 (en) | 2018-08-16 |
Family
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/JP2017/004652 WO2018146759A1 (en) | 2017-02-08 | 2017-02-08 | Bearing bush and pedal device comprising same |
Country Status (1)
| Country | Link |
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| WO (1) | WO2018146759A1 (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03161813A (en) * | 1989-11-20 | 1991-07-11 | Nissan Motor Co Ltd | Pedal bearing structure for automobile |
| JP2016024791A (en) * | 2014-07-24 | 2016-02-08 | 豊田鉄工株式会社 | Bearing part structure of pedal device for vehicle and bush |
| JP2016031563A (en) * | 2014-07-25 | 2016-03-07 | 豊田鉄工株式会社 | Bearing part structure of pedal device for vehicle, and bush with flange |
| JP2016038641A (en) * | 2014-08-05 | 2016-03-22 | 豊田鉄工株式会社 | Bearing part structure of vehicle pedal device, and bush |
| JP2016056944A (en) * | 2014-09-11 | 2016-04-21 | オイレス工業株式会社 | Bearing bush and pedal device with this bearing bush |
| JP2017020626A (en) * | 2015-07-14 | 2017-01-26 | オイレス工業株式会社 | Bearing bush and pedal device having the bearing bush |
-
2017
- 2017-02-08 WO PCT/JP2017/004652 patent/WO2018146759A1/en active Application Filing
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03161813A (en) * | 1989-11-20 | 1991-07-11 | Nissan Motor Co Ltd | Pedal bearing structure for automobile |
| JP2016024791A (en) * | 2014-07-24 | 2016-02-08 | 豊田鉄工株式会社 | Bearing part structure of pedal device for vehicle and bush |
| JP2016031563A (en) * | 2014-07-25 | 2016-03-07 | 豊田鉄工株式会社 | Bearing part structure of pedal device for vehicle, and bush with flange |
| JP2016038641A (en) * | 2014-08-05 | 2016-03-22 | 豊田鉄工株式会社 | Bearing part structure of vehicle pedal device, and bush |
| JP2016056944A (en) * | 2014-09-11 | 2016-04-21 | オイレス工業株式会社 | Bearing bush and pedal device with this bearing bush |
| JP2017020626A (en) * | 2015-07-14 | 2017-01-26 | オイレス工業株式会社 | Bearing bush and pedal device having the bearing bush |
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