WO2016038818A1

WO2016038818A1 - Bearing bush and pedal device with said bearing bush

Info

Publication number: WO2016038818A1
Application number: PCT/JP2015/004262
Authority: WO
Inventors: 勝利熊澤; 沖村　明彦
Original assignee: オイレス工業株式会社
Priority date: 2014-09-11
Filing date: 2015-08-25
Publication date: 2016-03-17

Abstract

A bearing bush 1 comprises: a circular cylindrical section 6 having a circular cylindrical inner surface 2 and a circular cylindrical outer surface 3; a circular cylindrical section 12 having a circular cylindrical inner surface 7 and a circular cylindrical outer surface 8; a bulge 17 provided between the circular cylindrical sections 6, 12 in the axial direction X and having a concave inner surface 15 and a convex outer surface 16; an annular flange 19 extended toward the outside A in the radial direction Y at the other end 18 of the circular cylindrical section 6 in the axial direction X; a slit 21 for dividing the circular cylindrical sections 6, 12, the bulge 17, and the annular flange 19; and a plurality of tilted plate sections 23 formed integrally with the outer peripheral edge 22 of the annular flange 19 and extended in a tilted position toward the outside A in the radial direction Y from the outer peripheral edge 22.

Description

Bearing bush and pedal device provided with the bearing bush

The present invention relates to a bearing bush and a pedal device provided with the bearing bush.

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.

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.

Japanese Utility Model Publication No. 61-143217 Japanese Utility Model Publication No. 6-23854

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.

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.

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.

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.

However, both of the techniques described in Patent Document 1 and Patent Document 2 are techniques for preventing the pedal arm from rolling, and an operation feeling caused by 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 prevent the pedal arm from rolling and to prevent a decrease in operation feeling and abnormal noise caused by radial play. A bearing bush and a pedal device including the bearing bush are provided.

The bearing bush of the present invention includes a hollow main body, an inclined plate provided at one end of the hollow main body, and from one end of the hollow main body toward the other end of the hollow main body. At least one first slit extending in the hollow main body and at least one first slit provided in the hollow main body extending from the other end of the hollow main body toward one end of the hollow main body. A second slit, and at least one third slit provided in the inclined plate portion in communication with the first slit at one end of the hollow main body portion. The diameter can be reduced by the first to third slits, and the inclined plate portion is inclined in a direction from the other end portion of the hollow main body portion toward one end portion of the hollow main body portion.

According to the bearing bush of the present invention, since the hollow body portion can be reduced in diameter by the first to third slits, it is determined by the dimensional tolerance between the inner diameter dimension of the hollow body section and the outer diameter dimension of the shaft member. The bearing gap (backlash) can be absorbed, the operational feeling can be prevented from lowering due to the radial play caused by the bearing gap and the generation of abnormal noise, and the inclined plate can be removed from the other end of the hollow body. Since it is inclined in the direction toward one end, it can absorb the axial gap (backlash) due to the elastic deformation of the inclined plate portion, and the operation feeling decreases due to the increase of sliding resistance and the axial gap (backlash). ) Can be prevented, and thus the operational feeling can be improved.

The bearing bush of the present invention also includes a hollow main body portion having an annular curved concave inner surface and a curved convex outer surface, and an annular flange portion extending radially outward from one end portion of the hollow main body portion, At least one first slit provided in the hollow main body portion extending from one end portion of the hollow main body portion toward the other end portion of the hollow main body portion, and the hollow main body portion from the other end portion of the hollow main body portion. At least one second slit provided in the hollow main body portion extending toward one end of the hollow body portion, and provided in the annular collar portion in communication with the first slit at one end portion of the hollow main body portion. At least one third slit, and at least one extending from the outer peripheral edge of the annular flange portion radially outward from the other end portion of the hollow body portion toward the one end portion of the hollow body portion. One hollow plate part, and the hollow body part is the first? It is freely contracted by the third slit.

According to the bearing bush of the present invention, at least one first slit provided in the hollow main body portion extending from one end portion of the hollow main body portion toward the other end portion of the hollow main body portion, At least one second slit provided in the hollow body portion extending from the other end portion of the body portion toward one end portion of the hollow body portion, and a first slit at one end portion of the hollow body portion The hollow main body portion can be reduced in diameter by at least one third slit provided in the annular flange portion in communication with the dimensional tolerance of the inner diameter dimension of the hollow main body portion and the outer diameter dimension of the shaft member. The bearing clearance (backlash) determined by the bearing clearance can be absorbed, the operational feeling can be reduced and the noise can be prevented from being generated due to the radial play caused by the bearing clearance, and it can extend radially outward from the outer periphery of the annular flange. At least one inclined plate provided Is inclined in the direction from the other end of the hollow main body part to the one end of the hollow main body part, so that the axial deformation (backlash) can be absorbed by the elastic deformation of the inclined plate part, and the sliding resistance can be reduced. It is possible to prevent a decrease in operation feeling due to the increase and generation of abnormal noise due to an axial gap (backlash), thus improving the operation feeling.

In the present invention, the hollow main body portion has a pair of cylindrical portions having a cylindrical inner surface and a cylindrical outer surface, a curved concave inner surface and a curved convex outer surface disposed between the pair of cylindrical portions. It may have at least one curved bulge, and in this case, the annular flange extends from the cylindrical outer surface of one end of one cylindrical portion outward in the radial direction. In addition, the hollow main body may include at least one curved bulging portion having a curved concave inner surface and a curved convex outer surface. Each of the convex outer surfaces is connected to one and the other annular end surfaces of the hollow main body portion and extends from the one annular end surface to the other annular end surface, and the annular flange portion is a curved bulge portion. It may be extended radially outward from the curved convex outer surface, and further, hollow The body portion includes a cylindrical portion having a cylindrical inner surface and a cylindrical outer surface, and at least one curved bulge portion connected to the cylindrical portion and having a curved concave inner surface and a curved convex outer surface. In this case, the annular flange is extended radially outward from one end of the cylindrical part connected to one end of the curved bulge. The other end of the hollow main body may be the other end of the curved bulge, and the hollow main body has a cylindrical inner surface and a cylindrical outer surface, It may be provided with at least one curved bulging portion connected to the cylindrical portion and having a curved concave inner surface and a curved convex outer surface. Extending from the one end of the curved bulging portion connected to one end of the ring-shaped portion outward in the radial direction, The other end of the body portion may be made from the other end of the cylindrical portion.

When the hollow body portion includes a pair of cylindrical portions, the pair of cylindrical portions may have the same length in the axial direction, but instead have different lengths in the axial direction. If the pair of cylindrical portions have different lengths in the axial direction, the curved bulge portion is biased toward one end side or the other end side of the hollow body portion. Will be arranged.

In the present invention, the hollow main body portion may be provided with a single curved bulge portion that is continuous in the circumferential direction, but instead, a plurality of curved shapes arranged at intervals in the circumferential direction. It may have a bulging portion, and may have two curved bulging portions arranged with an interval in the circumferential direction, preferably with an angular interval of 180 °. You may comprise the 3 or more curved bulging part arrange | positioned at equal intervals mutually in the circumferential direction.

In the bearing bush of the present invention, at least one first slit extends from the annular end surface of one end portion of the hollow body portion to the annular end surface of the other end portion and divides the hollow body portion in the circumferential direction. It may communicate with at least one second slit so as to be one slit, but instead, each of at least one first and second slits spaced apart from each other in the circumferential direction, It may terminate between one end and the other end of the hollow main body, and may have overlapping portions that overlap each other in the circumferential direction.

The bearing bush of the present invention may include only one inclined plate portion, but instead of this, it may include a plurality of inclined plate portions. , Spaced apart from each other in the circumferential direction. Preferably, when there are two or more pieces, they are spaced apart by 180 °, and when there are three or more pieces, they are spaced apart from each other at equal intervals and are integrated with the outer peripheral edge of the annular collar. If it is formed, it can absorb the gap (backlash) in the axial direction evenly.

In the bearing bush of the present invention, the hollow main body portion, the annular flange portion and the inclined plate portion may be integrally formed from a synthetic resin such as polyacetal resin or polyamide resin, and may be made of copper, copper alloy, aluminum, aluminum alloy, or the like. The non-ferrous metal plate or the stainless steel plate may be integrally formed, and further, the steel sheet, the porous metal sintered layer integrally formed on the steel sheet, and the porous metal sintered layer are filled and coated. You may integrally form from the multilayer board which comprised the synthetic resin layer.

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, the curved concave inner surface and the outer surface of the shaft member so that the curved convex outer surface contacts the inner surface of the boss, while the inclined plate portion contacts the pedal bracket and the boss. And the above-described bearing bush having a hollow main body disposed between the shaft members.

According to the pedal device of the present invention, the bearing clearance (backlash) determined by the inner diameter dimension of the bearing bush and the outer diameter dimension of the shaft member is such that the hollow main body portion can be reduced in diameter and 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 abnormal noise caused by the bearing gap is prevented, and also caused by an axial gap between the pedal bracket and the bearing bush. Since the roll of the pedal arm is absorbed by the elastic deformation of the inclined plate portion in the axial direction, the generation of noise due to the roll of the pedal arm and, consequently, the roll is prevented.

In the pedal device of the present invention, when the hollow body portion press-fitted to the boss fixed to the pedal arm by the pedal operation of the pedal arm rotates together with the boss, the inclined plate portion is in contact with the pedal bracket. Therefore, the pedal operation is smoothly performed without increasing the sliding resistance between the pedal bracket and the pedal bracket.

According to the present invention, it is possible to provide a bearing bush that can prevent the pedal arm from rolling and prevent a decrease in operation feeling and abnormal noise caused by radial play, and a pedal device including the bearing bush. Can do.

FIG. 1 is an explanatory side view of an example of a preferred embodiment 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 an example of a preferred embodiment 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 an example of another preferred embodiment 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 a cross-sectional explanatory view of another example of the preferred embodiment of the bearing bush of the present invention. FIG. 8 is a cross-sectional explanatory view of still another example of the preferred embodiment of the bearing bush of the present invention. FIG. 9 is a cross-sectional explanatory view of still another example of the preferred embodiment of the bearing bush of the present invention. FIG. 10 is a cross-sectional explanatory view taken along the line XX of FIG. 11 of still another example of the preferred embodiment of the bearing bush of the present invention. 11 is a cross-sectional explanatory view taken along the line XI-XI in FIG. 12 is a cross-sectional explanatory view taken along the line XII-XII in FIG. 13 of still another example of the preferred embodiment of the bearing bush of the present invention. 13 is an explanatory cross-sectional view taken along line XIII-XIII in FIG.

Next, the present invention and its embodiments will be described in more detail based on preferred examples shown in the drawings. In addition, this invention is not limited to these Examples at all.

1 and 2, the bearing bush 1 of this example includes a cylindrical inner surface 2 and a cylindrical outer surface 3, an annular tapered inner surface 4 connected to the cylindrical inner surface 2, and an axial direction X connected to the annular tapered inner surface 4. A cylindrical portion 6 having an annular end surface 5, a cylindrical inner surface 7 and a cylindrical outer surface 8, an annular tapered inner surface 9 and an annular tapered outer surface 10 connected to the cylindrical inner surface 7 and the cylindrical outer surface 8, respectively, and an annular shape. A cylindrical portion 12 having an annular end surface 11 in the axial direction X connected to each of the tapered inner surface 9 and the annular tapered outer surface 10, and an axial direction X disposed between the

cylindrical portions

6 and 12 in the axial direction X. The cylindrical

inner surfaces

2 and 7 of the respective one

end portions

13 and 14 of the

cylindrical portions

6 and 12, and the annular curved concave inner surface 15 and the curved convex outer surface 16 connected to the cylindrical

outer surfaces

3 and 8. Curved bulge 17 An annular flange 19 extending from the other end 18 in the axial direction X of the cylindrical portion 6 toward the outer side A in the radial direction Y, and the cylindrical portion 12 from the annular end surface 5 of the end 18. The

cylindrical portions

6 and 12 in the circumferential direction R around the axial center line O and one curved bulge continuous in the circumferential direction R extend to the annular end surface 11 of the other end portion 20 in the axial direction X. A slit (notch) 21 that divides the portion 17 and the annular flange portion 19 and an outer peripheral edge 22 of the annular flange portion 19 that are spaced apart from each other at equal intervals (equal angular intervals of 60 °) in the circumferential direction R. A plurality, which are formed in the axial direction X and are inclined in the direction C opposite to the direction B from the end 18 toward the end 20 in the axial direction X, and extend from the outer peripheral edge 22 outward A in the radial direction Y. Then, six inclined plate portions 23 are provided.

In this example, the curved concave inner surface 15 is formed of a part of a spherical surface having a radius r1, and a pair of

cylindrical portions

6 and 12, a curved bulging portion 17, an annular flange portion 19, and an inclined plate portion 23. The curved convex outer surface 16 is made up of a part of a spherical surface having a radius r2 (= r1 + t), but each of them may be made up of a part of an elliptical surface. Good.

The pair of

cylindrical portions

6 and 12, the curved bulging portion 17, the annular flange portion 19 and the inclined plate portion 23 are a steel thin plate and a porous metal sintered layer and a porous body integrally formed on the steel thin plate. It is integrally formed from a multilayer plate having a synthetic resin layer filled and coated with a sintered metal layer. The cylindrical

inner surfaces

2 and 7 and the curved concave inner surface 15 are formed of the synthetic resin layer of the multilayer plate. It consists of an exposed surface.

In the bearing bush 1, the

cylindrical portions

6 and 12 and the curved bulge portion 17 can be reduced in diameter by the slits 21, and a plurality of (six in the drawing) plate-like inclined plate portions 23 are It can be elastically deformed in the axial direction X by elastic flexibility.

A cylindrical portion 6 having a cylindrical inner surface 2 and a cylindrical outer surface 3, a cylindrical portion 12 having a cylindrical inner surface 7 and a cylindrical outer surface 8, and a curved concave portion disposed between the pair of

cylindrical portions

6 and 12. A hollow main body 25 having a curved bulging portion 17 having an inner surface 15 and a curved convex outer surface 16, and a cylindrical outer surface 3 of an end 18 of the cylindrical portion 6 which is one end of the hollow main body 25. Of the annular flange 19 as an annular flange extending from the outer side A in the radial direction Y to the cylindrical portion 12 which is the other end of the hollow body 25 from the end 18 of the hollow body 25 A slit 26 extending toward the end 20 and provided in the hollow body 25, a slit 27 extending from the end 20 toward the end 18 and provided in the hollow body 25, and a slit 26 at the end 18 And is opened at the outer peripheral edge 22 and provided in the annular collar 19 A slit 28, and an inclined plate portion 23 that is inclined in the direction C from the end portion 20 toward the end portion 18 and extends outwardly A in the radial direction Y from the outer peripheral edge 22 of the annular collar portion 19. The slit 26 extends from the annular end surface 5 of the end portion 18 to the annular end surface 11 of the end portion 20 and forms a single slit 29 that divides the hollow main body portion 25 in the circumferential direction. Such a bearing that is in communication and has a hollow main body portion 25 that can be reduced in diameter by a slit 21 that includes a slit 29 that includes

slits

26 and 27 and a slit 28 that divides the annular flange 19 in the circumferential direction. As shown in FIGS. 3 and 4, the pedal device 30 including the bush 1 is fixed to a cylindrical boss 31 and a cylindrical outer surface 32 of the boss 31 with a base portion (root portion) 33 at one end. A pedal arm 35 having a pedal 34 attached to the end thereof, a shaft member 38 disposed in the boss 31 so as to be rotatable relative to the boss 31 in the circumferential direction R, and having

end portions

36 and 37;

End portions

36 and 37 of the shaft member 38 have

side walls

39 and 40 fixed by caulking, and

pedal brackets

41 and 42 fixed to the dash panel of the vehicle body.

In such a pedal device 30, the bearing bush 1 is disposed on the side wall 39 side and the side wall 40 side, and the bearing bush 1 on the side wall 39 side includes the curved concave inner surface 15 of the curved bulging portion 17 and the shaft member 38. The cylindrical

inner surface

2 and 7 of the pair of

cylindrical portions

6 and 12 are brought into contact with the outer surface 55 of the shaft member 38 so as to form an annular space 56 between the cylindrical outer surfaces 55, respectively, and a curved bulge is formed. The curved convex outer surface 16 of the portion 17 is brought into contact with the cylindrical inner surface 57 of the boss 31, while the distal end portion (free end portion) 58 of each inclined plate portion 23 is brought into contact with the side wall 39 of the pedal bracket 41 to Similarly, the bearing bush 1 on the side wall 40 side is arranged between the shaft members 38 so that an annular space 56 is formed between the curved concave inner surface 15 of the curved bulging portion 17 and the outer surface 55 of the shaft member 38. And a pair of

cylindrical portions

6 and 2, the cylindrical

inner surfaces

2 and 7 are brought into contact with the outer surface 55 of the shaft member 38, and the curved convex outer surface 16 of the curved bulging portion 17 is brought into contact with the inner surface 57 of the boss 31. The portion 58 is disposed between the boss 31 and the shaft member 38 so as to contact the side wall 40 of the pedal bracket 42.

In the pedal device 30 described above, the bearing gap (backlash) determined by the inner diameter dimension defined by the cylindrical

inner surfaces

2 and 7 of the bearing bush 1 and the outer diameter dimension defined by the outer surface 55 of the shaft member 38 is the bearing bush. The cylindrical

inner surfaces

2 and 7 can be reduced in diameter, and the curved convex outer surface 16 of the curved bulging portion 17 contacts the inner surface 57 of the boss 31 so as to form an annular space 56. Therefore, the noise is always maintained at an appropriate value, and the generation of noise due to the bearing gap is prevented. In addition, the radial gap between the side wall 39 of the pedal bracket 41 and the bearing bush 1 and the pedal bracket Since the roll of the pedal arm 35 caused by the gap in the radial direction Y between the side wall 40 of the bearing 42 and the bearing bush 1 is absorbed by the elastic deformation of the inclined plate portion 23 in the axial direction X, the roll of the pedal arm 35 is By extension Generation of abnormal noise due to the roll is prevented.

Moreover, in the pedal device 30, when the bearing bush 1 press-fitted to the inner surface 57 of the boss 31 to which the pedal arm 35 is fixed by the pedal operation of the pedal arm 35 rotates together with the boss 31 in the circumferential direction R, the bearing bush 1 Is in contact with the

side walls

39 and 40 of the

pedal brackets

41 and 42 at the inclined plate portion 23, so that the sliding resistance between the bearing bush 1 and the

pedal brackets

41 and 42 is not increased. Operation is smooth.

Further, in the bearing bush 1 of the pedal device 30, the plurality of inclined plate portions 23 are integrally formed on the outer peripheral edge 22 of the annular flange portion 19 so as to be spaced apart at equal intervals in the circumferential direction R. The gap (backlash) in the axial direction X can be evenly absorbed.

Incidentally, the bearing bush 1 includes six inclined plate portions 23. Instead, the bearing bush 1 is equally spaced in the circumferential direction R as shown in FIGS. The cylindrical portion 12 is formed from the other end 18 of the cylindrical portion 6 in the axial direction X while being formed integrally with the outer peripheral edge 22 of the annular flange 19 and spaced apart from each other at an equal angular interval of 120 °. Three inclined plate portions 23 that are inclined in the direction C opposite to the direction B toward the other end portion 20 and extend from the outer peripheral edge 22 of the annular collar portion 19 outward A in the radial direction Y. In the bearing bush 1 shown in FIGS. 5 and 6, the sliding resistance between the

pedal brackets

41 and 42 and the

side walls

39 and 40 can be reduced.

Further, in the bearing bush 1 described above, the hollow main body portion 25 includes the pair of

cylindrical portions

6 and 12 and the curved bulge portion 17 disposed between the pair of

cylindrical portions

6 and 12 in the axial direction X. However, instead of this, as shown in FIG. 7, the hollow main body portion 25 has a curved bulge portion that is continuous in the circumferential direction R and has a curved concave inner surface 15 and a curved convex outer surface 16. 17, and in this case, each of the curved concave inner surface 15 and the curved convex outer surface 16 has one of the hollow body portion 25, that is, one of the curved bulged portion 17 in the axial direction X and the other. Each of the annular end surfaces 61 and 62 is connected to the annular end surface 61 and extends from the annular end surface 61 to the annular end surface 62, and the annular flange portion 19 extends from one end of the curved convex outer surface 16 to the outer side A in the radial direction Y. The extended slits 26 and 27 communicated with each other. The slit 29 is opened at one end at the annular end surface 61 and at the other end at the annular end surface 62 and extends from the annular end surface 61 to the annular end surface 62 so that the curved bulging portion 17 extends in the circumferential direction R. The slit 28 communicates with the slit 26 and is provided in the annular flange 19.

The curved concave inner surface 15 is formed so as to have the hollow body portion 25 including the curved bulging portion 17 shown in FIG. 7 and to form an annular space 56 between the curved concave inner surface 15 and the outer surface 55 of the shaft member 38. The both ends in the axial direction X are brought into contact with the outer surface 55 of the shaft member 38 and the curved convex outer surface 16 is brought into contact with the inner surface 57 of the boss 31, while the tip 58 of each inclined plate portion 23 is connected to the side wall 39 of the pedal bracket 41. Further, the bearing bushes 1 on the side wall 39 side and the side wall 40 side, which are arranged in contact with the boss 31 and the shaft member 38 in contact with each of the side walls 40, are also shown in FIG. 1 and FIG. The same effect can be obtained.

Further, in the above-described bearing bush 1, the hollow main body portion 25 includes the pair of

cylindrical portions

6 and 12 and the curved bulging portion 17 or the curved bulging portion 17 disposed between the pair of

cylindrical portions

6 and 12. However, instead of this, as shown in FIG. 8, a cylindrical portion 12 having a cylindrical inner surface 7 and a cylindrical outer surface 8 is connected to the cylindrical portion 12 in the axial direction X. And a curved bulging portion 17 having a curved concave inner surface 15 and a curved convex outer surface 16. In this case, the annular collar portion 19 is one of the cylindrical portions 12 in the axial direction X. Is extended from the one annular end 65 of the curved bulging portion 17 connected to the outer end 14 to the outer side A in the radial direction Y, and is an end as one end in the axial direction X. The other end portion in the axial direction X of the hollow main body portion 25 having 65 is the other end portion 2 of the cylindrical portion 12. The slit 29 composed of the

slits

26 and 27 communicated with each other is an annular end surface 66 in the axial direction X of the curved bulging portion 17 at one end in the axial direction X and a circular shape at the other end in the axial direction X. Each of the annular end surfaces 11 is opened and extends from the annular end surface 66 to the annular end surface 11 to divide the curved bulging portion 17 and the cylindrical portion 12 in the circumferential direction R. The slit 28 that divides in the direction R communicates with the slit 26 and is provided in the annular flange 19.

A hollow body portion 25 having the curved bulging portion 17 and the cylindrical portion 12 shown in FIG. 8 is provided, and an annular space 56 is formed between the curved concave inner surface 15 and the outer surface 55 of the shaft member 38. The cylindrical inner surface 67 at the end 65 of the curved bulging portion 17 connected to the curved concave inner surface 15 in the axial direction X and the cylindrical inner surface 7 of the cylindrical portion 12 connected to the curved concave inner surface 15 in the axial direction X. Are respectively brought into contact with the outer surface 55 of the shaft member 38 and the curved convex outer surface 16 is brought into contact with the inner surface 57 of the boss 31, while the tip 58 of each inclined plate portion 23 is brought into contact with the side wall 39 and the side wall 40 of the pedal bracket 41, respectively. The bearing bushes 1 on the side wall 39 side and the side wall 40 side which are arranged so as to be in contact with each other between the boss 31 and the shaft member 38 also obtain the same effect as the bearing bush 1 shown in FIGS. Can Kill.

In the example shown in FIG. 8, the hollow main body portion 25 includes the curved bulging portion 17 provided with the annular flange portion 19 at the end portion 65, but instead, as shown in FIG. 9. A cylindrical portion 6 having a cylindrical inner surface 2 and a cylindrical outer surface 3, and a curved bulge connected to the cylindrical portion 6 in the axial direction X and having a curved concave inner surface 15 and a curved convex outer surface 16. The annular flange portion 19 is provided in the radial direction from the end portion 18 of the cylindrical portion 6 in which one end portion in the axial direction X of the curved bulging portion 17 is connected to the end portion 13. In this case, the other end portion in the axial direction X of the hollow body portion 25 having the end portion 18 as one end portion in the axial direction X may be curvedly bulged. The slit 29 consisting of the

slits

26 and 27, which is composed of the other end 68 of the portion 17 and communicated with each other, One end opens at the annular end surface 5 of the cylindrical portion 6, and the other end in the axial direction X opens at the annular end surface 69 of the end portion 68 in the axial direction X of the curved bulge portion 17. The slit 28 that extends to the annular end surface 69 divides the cylindrical portion 6 and the curved bulging portion 17 in the circumferential direction R, and the slit 28 that divides the annular flange portion 19 in the circumferential direction R communicates with the slit 26. Are provided on the annular flange 19.

The hollow body portion 25 having the cylindrical portion 6 and the curved bulging portion 17 shown in FIG. 9 is provided, and an annular space 56 is formed between the curved concave inner surface 15 and the outer surface 55 of the shaft member 38. The cylindrical inner surface 2 of the cylindrical portion 6 and the curved concave inner surface 15 at the end 68 are brought into contact with the outer surface 55 of the shaft member 38 and the curved convex outer surface 16 is brought into contact with the inner surface 57 of the boss 31, respectively. The distal end portion 58 of the inclined plate portion 23 is brought into contact with the side wall 39 and the side wall 40 of the pedal bracket 41 so as to be arranged between the boss 31 and the shaft member 38, respectively. The bearing bush 1 can also obtain the same effect as the bearing bush 1 shown in FIGS.

By the way, in any of the above-described bearing bushes 1, the hollow main body portion 25 includes one curved bulged portion 17 continuous in the circumferential direction R. Instead of this, for example, as shown in FIG. In the bearing bush 1, as shown in FIGS. 10 and 11, the hollow body portion 25 has a plurality of (six in the figure) curved bulges arranged at intervals in the circumferential direction R, preferably at equal intervals. In this case, each of the curved concave inner surface 15 and the curved convex outer surface 16 of the curved bulging portion 17 may be formed of a part of an elliptical surface. The hollow body portion 25 is sandwiched between the cylindrical inner surface 2 and the cylindrical outer surface 3 and the cylindrical inner surface 7 and the cylindrical outer surface 8 in the axial direction X, and Same as cylindrical inner surface 2 and cylindrical outer surface 3 Has a cylindrical inner surface 7 and the cylindrical inner surface 71 and outer cylindrical surface 72 of the cylindrical outer surface 8 dihedral mere are separated by curved swelling portion 17 in the circumferential direction R in.

10 and 11 includes a hollow main body 25 having a plurality of curved bulges 17 and a space in the circumferential direction R between each of the curved concave inner surfaces 15 and the outer surface 55 of the shaft member 38. Each of the cylindrical

inner surfaces

2 and 7 and the cylindrical inner surface 71 is brought into contact with the outer surface 55 of the shaft member 38 so as to form a plurality of annular voids 56, and each of the curved convex outer surfaces 16 is connected to the inner surface 57 of the boss 31. While the front end 58 of each inclined plate portion 23 is brought into contact with the side wall 39 and the side wall 40 of the pedal bracket 41 so as to be arranged between the boss 31 and the shaft member 38, and Each bearing bush 1 on the side wall 40 side can also obtain the same effect as the bearing bush 1 shown in FIGS. 1 and 2.

Furthermore, in any of the above-described bearing bushes 1, one slit 29 communicated with each other is formed by the

slits

26 and 27, and the slit 28 is communicated with the slit 26 so that the hollow body portion 25 can be reduced in diameter. However, instead of this, for example, in the bearing bush 1 shown in FIG. 1, as shown in FIG. 12 and FIG. 13, they are spaced apart from each other in the circumferential direction R, equally spaced in the figure, and annular at one end. A plurality of (three in the figure) slits 26 that open at the end face 5 and terminate between the

end portions

18 and 20 in the axial direction X at the other end are similarly spaced from each other in the circumferential direction R, and equally spaced in the figure. And is open at the annular end surface 11 at one end, and ends between the

end portions

18 and 20 in the axial direction X at the other end, and in the circumferential direction R, respectively. A plurality of (three in the figure) slits 27 arranged in the middle between the slits 26 are provided in the hollow main body 25 with overlapping portions 75 that overlap each other in the circumferential direction R, and each of the slits 26 at the end 18. A plurality of (in the figure, three) slits 28 communicating with each other may be provided in the annular flange 19 so that the hollow main body 25 can be reduced in diameter.

The bearing bush 1 shown in FIGS. 12 and 13 can also be used for the pedal device 30 to maintain the bearing gap at an appropriate value at all times, prevent the generation of abnormal noise due to the bearing gap, and the pedal bracket 41. The lateral movement of the pedal arm 35 caused by the gap in the radial direction Y between the side wall 39 and the bearing bush 1 and the gap in the radial direction Y between the side wall 40 of the pedal bracket 42 and the bearing bush 1 is reduced in the axial direction X of the inclined plate portion 23. Can be absorbed by the elastic deformation of the pedal arm 35, and it is possible to prevent the occurrence of abnormal noise due to the rolling of the pedal arm 35 and, in turn, the rolling.

DESCRIPTION OF SYMBOLS 1

Bearing bush

2, 7, 67 Cylindrical

inner surface

3, 8, 72 Cylindrical outer surface 4, 9 Annular taper

inner surface

5, 11, 61, 62, 66, 69, 71

Annular end surface

6, 12 Cylindrical part 10 yen Annular taper

outer surface

13, 14, 18, 20, 36, 37, 65, 68 End 15 Curved concave inner surface 16 Curved convex outer surface 17 Curved bulged portion 19

Annular collar

21, 26, 27, 28, 29 Slit 22 Outer peripheral edge 23 Inclined plate

Claims

A hollow main body, an inclined plate provided at one end of the hollow main body, and a hollow main body extending from one end of the hollow main body toward the other end of the hollow main body. At least one first slit formed, and at least one second slit provided in the hollow body portion extending from the other end portion of the hollow body portion toward one end portion of the hollow body portion, and hollow At least one third slit provided in the inclined plate portion in communication with the first slit at one end of the main body, and the hollow main body is formed by the first to third slits. The bearing bush is capable of reducing the diameter, and the inclined plate portion is inclined in a direction from the other end portion of the hollow main body portion toward one end portion of the hollow main body portion.
A hollow main body having an annular curved concave inner surface and a curved convex outer surface, an annular flange extending radially outward from one end of the hollow main body, and one end of the hollow main body Extending from the other end of the hollow body to the other end of the hollow body, and from the other end of the hollow body to the one end of the hollow body And at least one second slit extending in the hollow main body, and at least one third slit provided in the annular flange in communication with the first slit at one end of the hollow main body. And at least one inclined plate portion that is inclined in a direction from the other end portion of the hollow main body portion toward one end portion of the hollow main body portion and extends radially outward from the outer peripheral edge of the annular flange portion. The hollow main body is automatically reduced in diameter by the first to third slits. Bearing bush that is the.
The hollow main body portion has a pair of cylindrical portions having a cylindrical inner surface and a cylindrical outer surface, and at least one curved portion disposed between the pair of cylindrical portions and having a curved concave inner surface and a curved convex outer surface. The bearing bush according to claim 2, further comprising a cylindrical bulge portion, wherein the annular flange portion extends radially outward from a cylindrical outer surface of one end portion of the one cylindrical portion.
The hollow body portion includes at least one curved bulging portion having a curved concave inner surface and a curved convex outer surface, and each of the curved concave inner surface and the curved convex outer surface includes one of the hollow main body portion and It is connected to the other annular end surface and extends from the one annular end surface to the other annular end surface, and the annular flange extends radially outward from the curved convex outer surface of the curved bulge portion. The bearing bush according to claim 2.
The hollow main body includes a cylindrical portion having a cylindrical inner surface and a cylindrical outer surface, and at least one curved bulge portion connected to the cylindrical portion and having a curved concave inner surface and a curved convex outer surface. The annular flange portion extends radially outward from one end of the cylindrical portion where one end of the curved bulge portion is connected, and the other end of the hollow main body portion. The bearing bush according to claim 2, wherein the end portion of the first portion is composed of the other end portion of the curved bulge portion.
The hollow main body includes a cylindrical portion having a cylindrical inner surface and a cylindrical outer surface, and at least one curved bulge portion connected to the cylindrical portion and having a curved concave inner surface and a curved convex outer surface. The annular flange is extended radially outward from one end of the curved bulging portion connected to one end of the cylindrical portion, and the other end of the hollow body portion. The bearing bush according to claim 2, wherein the end portion of the cylindrical portion comprises the other end portion of the cylindrical portion.
The bearing bush according to any one of claims 2 to 6, wherein the hollow main body includes a single curved bulge that is continuous in the circumferential direction.
The bearing bush according to any one of claims 3 to 6, wherein the hollow main body includes a plurality of curved bulges arranged at intervals in the circumferential direction.
The at least one first slit extends from the annular end surface of one end of the hollow body portion to the annular end surface of the other end portion, and is a single slit that divides the hollow body portion in the circumferential direction. The bearing bush according to claim 2, wherein the bearing bush communicates with at least one second slit.
Each of the at least one first and second slits spaced apart from each other in the circumferential direction terminates between one end and the other end of the hollow body portion, and has an overlapping portion that overlaps with each other in the circumferential direction. The bearing bush according to any one of claims 2 to 8.
The plurality of inclined plate portions are provided, and the plurality of inclined plate portions are integrally formed on the outer peripheral edge of the annular collar portion while being separated from each other in the circumferential direction. A bearing bush according to claim 1.
The bearing bush according to any one of claims 2 to 11, wherein the hollow main body portion, the annular flange portion and the inclined plate portion are integrally formed from a synthetic resin, a non-ferrous metal plate or a stainless steel plate.
The hollow main body portion, the annular flange portion and the inclined plate portion each include a steel thin plate, a porous metal sintered layer integrally formed on the steel thin plate, and a synthetic resin layer filled and covered with the porous metal sintered layer. The bearing bush according to any one of claims 2 to 11, wherein the bearing bush is integrally formed from a multilayered plate.
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, and the curved convex outer surface is brought into contact with the inner surface of the boss, while the inclined plate portion is brought into contact with the pedal bracket so that the hollow body is between the boss and the shaft member. The pedal apparatus provided with the bearing bush as described in any one of Claim 2 to 13 formed by arranging a part.