WO2020202703A1 - センターベアリング - Google Patents
センターベアリング Download PDFInfo
- Publication number
- WO2020202703A1 WO2020202703A1 PCT/JP2020/001320 JP2020001320W WO2020202703A1 WO 2020202703 A1 WO2020202703 A1 WO 2020202703A1 JP 2020001320 W JP2020001320 W JP 2020001320W WO 2020202703 A1 WO2020202703 A1 WO 2020202703A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- slit
- rubber
- elastic body
- center
- shaft hole
- Prior art date
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Classifications
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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
- F16C27/00—Elastic or yielding bearings or bearing supports, for exclusively rotary movement
- F16C27/02—Sliding-contact bearings
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K17/00—Arrangement or mounting of transmissions in vehicles
- B60K17/22—Arrangement or mounting of transmissions in vehicles characterised by arrangement, location, or type of main drive shafting, e.g. cardan shaft
- B60K17/24—Arrangements of mountings for shafting
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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
- F16C2326/00—Articles relating to transporting
- F16C2326/01—Parts of vehicles in general
- F16C2326/06—Drive shafts
Definitions
- the present invention relates to a center bearing for fastening and supporting a propeller shaft to a chassis.
- the propeller shaft of a vehicle is rotatably supported by a center bearing that is fastened and supported by a chassis.
- a center bearing is known to include a rubber-like elastic body having a shaft hole portion that pivotally supports the propeller shaft, and a bracket that holds the rubber-like elastic body in the chassis. ing.
- a concave groove is formed in the center of the upper and lower sides of the rubber-like elastic body formed in a rectangular shape, and the bracket is formed in a rectangular shape so as to cover the rubber-like elastic body.
- the concave groove forms a gap between the upper and lower sides of the rubber-like elastic body and the bracket, so that the rubber-like elastic body can be deformed relatively freely in the vertical direction. As a result, it is possible to suppress the vibration of the propeller shaft from being transmitted to the chassis.
- an object of the present invention is to solve the above problems and to provide a center bearing capable of sufficiently absorbing the vibration by the rubber-like elastic body even when the propeller shaft vibrates relatively large.
- the rubber-like elastic body is formed in a rectangular shape by providing a rubber-like elastic body having a shaft hole portion for supporting the propeller shaft and a bracket for holding the rubber-like elastic body in the chassis.
- the bracket In the center bearing in which a concave groove is formed in the center of the upper and lower sides of the rectangular rubber-like elastic body and the bracket is formed in a rectangular shape so as to cover the rectangular rubber-like elastic body, the bracket extends in the left-right direction.
- the concave groove has a groove bottom portion vertically separated from the horizontal member, and the rubber-like elasticity between the shaft hole portion and the groove bottom portion.
- the body is provided with a center bearing characterized in that a first slit is formed on the inner side and a second slit is formed on the outer side in a radial direction with respect to the center of the shaft hole portion.
- the groove bottom comes into contact with the lateral member when the vertical displacement of the propeller shaft is equal to or greater than a predetermined value.
- groove bottom portion, the first slit and the second slit are each formed in an arc shape concentric with the shaft hole portion.
- the second slit is arranged so as to overlap at least a part of the first slit in the circumferential direction with respect to the center of the shaft hole portion.
- a metal plate is embedded in the rubber-like elastic body along the left and right sides of the rubber-like elastic body, and the rubber-like elastic body between the metal plate and the shaft hole portion has the radial direction.
- a third slit is formed on the inner side, and a fourth slit is formed on the outer side.
- the third slit and the fourth slit are each formed in an arc shape concentric with the shaft hole portion.
- the fourth slit is arranged so as to overlap at least a part of the third slit in the circumferential direction with respect to the center of the shaft hole portion.
- a protrusion is formed so as to protrude inward or outward in the radial direction from the inner peripheral surface of the third slit.
- the rubber-like elastic body can sufficiently absorb the vibration.
- FIG. 3 It is a left side view of a propeller shaft including a center bearing. It is an exploded perspective view which shows the schematic structure of the center bearing. It is a rear view which shows the rubber-like elastic body of a center bearing.
- A) is a partial cross-sectional view taken along the line IVa-IVa of FIG. 3, and
- (b) is a partial cross-sectional view taken along the line IVb-IVb of FIG.
- the details of the bracket supporting the rubber-like elastic body are shown, (a) is a plan view, (b) is a rear view, and (c) is a left side view. It is a rear view when a rubber-like elastic body is attached to a bracket.
- the rubber-like elastic bodies of the first modified example and the second modified example are shown, (a) is a rear view, and (b) is a left side view. It is a rear view which shows the rubber-like elastic body of the 3rd modification. It is a rear view when the rubber-like elastic body is attached to the bracket of the 4th modification.
- the first propeller shaft 10 is connected to the transmission TM via the TM side universal joint 11, and the first propeller shaft 10 and the second propeller shaft 12 form an intermediate universal joint 13.
- the second propeller shaft 12 and the differential DIFF are connected via the differential side universal joint 14.
- the first propeller shaft 10 is fastened and supported by a vehicle chassis (not shown) via a center bearing 15.
- Reference numeral 16 is a balance weight for adjusting the eccentric center of gravity of the first propeller shaft 10 and the second propeller shaft 12.
- the power of the transmission TM is transmitted in the order of the TM side universal joint 11, the first propeller shaft 10, the intermediate universal joint 13, the second propeller shaft 12, the differential side universal joint 14, and the differential DIFF.
- the center bearing 15 includes a rubber-like elastic body 20 formed in a rectangular shape and a bracket 21 formed in a rectangular shape so as to cover the rubber-like elastic body 20.
- the rubber-like elastic body 20 has a rectangular block body 22 and a shaft hole portion 23 formed in the center of the block body 22.
- the "axial direction”, “diameter direction”, and “circumferential direction” of the present embodiment are based on the center C of the shaft hole portion 23.
- a pair of upper and lower concave grooves 24A and 24B are formed in the center in the left-right direction, and leg portions 25 are formed at positions on both left and right sides of the upper and lower concave grooves 24A and 24B. It is formed.
- a pair of left and right flat metal plates 26A and 26B embedded along the left and right sides (or left and right side surfaces) of the block body 22 are provided at both left and right ends of the block body 22.
- Protrusions 27 that engage with holes 41 (see FIG. 2) of the bracket 21, which will be described later, are formed at the upper and lower positions of the left and right sides of the block body 22.
- the block body 22 has a plurality of slits 30 to penetrate in the axial direction from the front surface (front surface 22a) to the back surface (rear surface 22b).
- 34B is formed. Details of the recessed grooves 24A and 24B and the slits 30 to 34B will be described later.
- the shaft hole portion 23 is formed so as to penetrate from the front surface 22a to the rear surface 22b of the block body 22. Further, the shaft hole portion 23 is formed in a cylindrical shape so as to project from the front surface 22a and the rear surface 22b of the block body 22 to the front side and the rear side in the axial direction.
- a bearing for rotatably supporting the first propeller shaft 10 is fitted and fixed to the inner peripheral surface of the shaft hole portion 23.
- Reference numeral 28 is a reinforcing metal cylinder embedded in the shaft hole portion 23.
- a pair of upper and lower split brackets 40A and 40B formed in a U-shaped or hat-shaped cross section are used for the bracket 21.
- the upper and lower split brackets 40A and 40B are formed with flanges 42 for connecting the split brackets 40A and 40B and fixing them to the chassis (not shown).
- the shapes of the upper and lower split brackets 40A and 40B are vertically symmetrical with each other. Therefore, here, only the shape of the lower split bracket 40B will be described, and the description of the upper split bracket 40A will be omitted.
- the lower split bracket 40B includes a horizontal member 43 extending in the left-right direction and facing the lower concave groove 24B of the rubber-like elastic body 20, a pair of left and right split vertical members 44 standing up from both ends of the horizontal member 43. It has a flange 42 extending outward in the left-right direction from the upper end of the divided vertical member 44.
- the central portion 43c of the horizontal member 43 in the left-right direction is formed to have substantially the same length in the left-right direction as the concave groove 24B (see FIG. 3) on the lower side of the rubber-like elastic body 20.
- the central portion 43c of the horizontal member 43 in the left-right direction is formed to have a width larger than the width of the block body 22 (see FIG. 4) of the rubber-like elastic body 20 in the front-rear direction.
- both end portions 43e of the horizontal member 43 in the left-right direction and the split vertical members 44 on both the left and right sides are formed in the front-rear direction with the same width as the block body 22.
- the lower split bracket 40B is provided with the first reinforcing rib 45 at the position of the central portion 43c of the horizontal member 43.
- the first reinforcing rib 45 is formed by bending both ends (front end and rear end) of the lateral member 43 in the width direction downward.
- the central portion 43c of the horizontal member 43 and the first reinforcing rib 45 have a U-shaped cross-sectional shape as a whole.
- the lower split bracket 40B is provided with a second reinforcing rib 46 formed in an L shape from both end portions 43e of the horizontal member 43 to the position of the central portion in the vertical direction of the split vertical member 44.
- the second reinforcing rib 46 is formed by bending both ends (front end and rear end) in the width direction of the horizontal member 43 and the split vertical member 44 inward in the radial direction.
- both end portions 43e of the horizontal member 43, the divided vertical member 44, and the second reinforcing rib 46 have a U-shaped cross-sectional shape as a whole.
- Holes 41 that are engaged with protrusions 27 (see FIG. 3) of the block body 22 are formed in the divided vertical members 44 on both the left and right sides.
- the joint portion 43j between the central portion 43c of the lateral member 43 and both end portions 43e is located between the first reinforcing rib 45 and the second reinforcing rib 46.
- a concave boss portion 47 is formed at the joint portion 43j in order to increase its strength.
- the flange 42 is formed by bending both ends (front end and rear end) in the width direction downward, and has a U-shaped cross-sectional shape.
- the flange 42 is formed with bolt insertion holes 48 for fastening the upper and lower split brackets 40A and 40B to each other with bolts and nuts.
- the block body 22 is divided into the split brackets 40A and 40B with the bearing (not shown) fitted in the shaft hole portion 23. Insert it in the vertical direction. Then, by fitting the protrusion 27 of the block body 22 into the hole 41 of the split bracket 40, the block body 22 is positioned in the split brackets 40A and 40B, the bearing is fixed to the shaft hole portion 23, and the legs of the block body 22 are fixed. The portion 25 is engaged with and held by the L-shaped second reinforcing rib 46. Further, in this state, the split brackets 40A and 40B are connected to each other by inserting the bolt into the bolt insertion hole 48 of the flange 42 and tightening the nut to the bolt, and the center bearing 15 is completed.
- the split brackets 40A and 40B are connected to each other by bolts and nuts.
- the flange 42 is fastened together with the chassis (not shown).
- the first propeller shaft 10 is fastened and supported by the chassis via the center bearing 15.
- the first propeller shaft 10 vibrates in the axial direction and the radial direction while the vehicle is traveling.
- the center bearing 15 of the present embodiment suppresses the vibration transmitted from the first propeller shaft 10 to the chassis by interposing the rubber-like elastic body 20 between the first propeller shaft 10 and the chassis. it can.
- the block body 22 of the rubber-like elastic body 20 is formed in a rectangular shape, and the legs 25 provided at the four corners thereof are held by the bracket 21. Therefore, the rubber-like elastic body 20 can have a relatively long radial distance from the shaft hole portion 23 to the bracket 21 at the position of the leg portion 25 in the circumferential direction. As a result, it is possible to secure a sufficient length for the rubber elastic body 20 to elastically deform in the radial direction, and to effectively suppress the transmission of vibration.
- a leg-side slit 30 is formed in the block body 22 between the shaft hole portion 23 and the leg portion 25 in order to absorb the vibration of the first propeller shaft 10.
- the leg-side slit 30 is formed in an elongated hole shape extending in the circumferential direction.
- Reference numeral 25a is a recess in which the front surface 22a and the rear surface 22b (see FIG. 4) of the block body 22 are recessed in order to adjust the elastic force of the leg portion 25.
- the leg side slit 30 is formed in the recess 25a.
- the block body 22 of the present embodiment has upper and lower recessed grooves 24A and 24B and first to fourth slits 31A to 34B as means for absorbing vibration of the first propeller shaft 10. Is provided.
- the upper and lower concave grooves 24A and 24B and the first to fourth slits 31A to 34B will be described.
- the upper and lower concave grooves 24A and 24B and the first to fourth slits 31A to 34B are provided symmetrically in the vertical and horizontal directions with reference to the center C of the shaft hole portion 23 of the rubber-like elastic body 20. Therefore, here, the lower concave groove 24B, the lower first and second slits 31B and 32B, and the left third and fourth slits 33A and 34A will be mainly described, and the upper concave groove 24A The details of the upper first and second slits 31A and 32A and the right third and fourth slits 33B and 34B will be omitted.
- the lower concave groove 24B has a groove bottom D that is vertically separated from the horizontal member 43 of the lower split bracket 40B.
- the groove bottom portion D is formed in an arc shape concentric with the shaft hole portion 23. That is, the groove bottom portion D has a cross-sectional shape such that the center of the lower concave groove 24B in the left-right direction is projected downward.
- the upper and lower concave grooves 24A and 24B form a gap between the upper and lower sides of the block body 22 and the horizontal member 43 of the bracket 21. Therefore, the rubber-like elastic body 20 can be freely deformed in the vertical direction as compared with the case where the concave grooves 24A and 24B are not provided. As a result, the rubber-like elastic body 20 is deformed by following the vertical displacement of the first propeller shaft 10, so that vibration can be effectively absorbed.
- the first slit 31B is formed on the inner side in the radial direction
- the second slit 32B is formed on the outer side in the radial direction. Will be done.
- the first slit 31B and the second slit 32B are formed in an arc shape concentric with the shaft hole portion 23, respectively. That is, the first slit 31B and the second slit 32B are formed in an elongated hole shape extending in the circumferential direction.
- Two first slits 31B are provided at intervals in the circumferential direction. Specifically, two are provided symmetrically with respect to the left-right center position C1 passing through the center C of the shaft hole portion 23.
- the left end of the first slit 31B on the left side is located at a position L in the left-right direction substantially the same as the left end of the groove bottom D
- the right end of the first slit 31B on the right side is a position R in the left-right direction substantially the same as the right end of the groove bottom D.
- the distance between the left and right first slits 31B is set to the distance of one first slit 31B in the circumferential direction.
- the first slit 31B may have any shape, and for example, two left and right first slits 31B may be connected to form one.
- the second slit 32B extends from the left and right center position C1 at equal distances on both sides in the circumferential direction, and is formed symmetrically. Further, in the circumferential direction, the left end portion of the second slit 32B is positioned so as to overlap the position of the right end portion of the first slit 31B on the left side, and the right end portion of the second slit 32B is the left end portion of the first slit 31B on the right side. It is positioned so as to overlap the position of. Further, the second slit 32B has a length in the circumferential direction longer than that of one first slit 31B, and has the same radial width as the first slit 31B.
- the second slit 32B is arranged between the groove bottom portion D and the first slits 31B on both the left and right sides in the radial direction.
- the second slit 32B may have any shape, and may be formed so as to overlap the entire two left and right first slits 31B in the circumferential direction, for example.
- the third slit 33A is formed on the inner side and the fourth slit 34A is formed on the outer side in the radial direction.
- the third slit 33A and the fourth slit 34A are formed in an arc shape concentric with the shaft hole portion 23, respectively. That is, the third slit 33A and the fourth slit 34A are formed in an elongated hole shape extending in the circumferential direction.
- the third slit 33A extends from the vertical center position C2 passing through the center C of the shaft hole portion 23 at equal distances on both sides in the circumferential direction, and is formed vertically symmetrically.
- the third slit 33A is formed to have a larger length in the circumferential direction and a larger width in the radial direction as compared with the first, second and fourth slits 31B, 32B and 34A.
- a protrusion P protruding radially inward from the inner peripheral surface on the radial outer side of the third slit 33A is formed.
- the protrusion P may protrude outward from the inner peripheral surface of the third slit 33A in the radial direction.
- the fourth slit 34A extends from the vertical center position C2 at equal distances on both sides in the circumferential direction, and is formed vertically symmetrically. Further, the fourth slit 34A is positioned so as to overlap the central portion of the third slit 33A in the circumferential direction. Further, the fourth slit 34A is arranged between the metal plate 26A on the left side and the third slit 33A in the radial direction. However, the fourth slit 34A may have any shape, and may be formed so as to overlap the entire third slit 33A in the circumferential direction, for example.
- the groove bottom of the concave groove may bend downward and come into contact with the horizontal member.
- the load input from the transmission to the propeller shaft increases, and the vertical displacement of the propeller shaft increases, so that the groove bottom portion easily contacts the lateral member.
- the concave groove makes it impossible to suppress the transmission of vibration, and the vibration transmitted to the chassis increases sharply.
- the first slit is formed in the rubber-like elastic body between the upper and lower sides of the block body and the horizontal member.
- the rubber-like elastic body is deformed in the vertical direction so that the bottom of the groove comes into contact with the horizontal member, the first slit is already deformed and crushed in the vertical direction, and the increase in vibration at the time of contact is limited to the first slit. May not be fully absorbed.
- the second slits 32A and 32B are provided between the first slits 31A and 31B and the groove bottom portion D.
- the second slits 32A and 32B are deformed in the vertical direction to absorb vibration.
- FIG. 8 is a graph schematically showing the spring characteristics of the rubber-like elastic body 20.
- the vertical axis is the downward load F (N) input to the rubber-like elastic body 20, and the horizontal axis is the downward deformation amount X (mm) of the rubber-like elastic body 20.
- the point t1 represents the load F and the amount of deformation X when the groove bottom portion D comes into contact with the horizontal member 43
- the point t2 is the load when the second slits 32A and 32B are crushed in the vertical direction. Represents F and the amount of deformation X.
- the spring constant k1 when the second slits 32A and 32B are not provided is the second slit 32A. , 32B, the spring constant increases sharply as compared with the spring constant k2.
- the first slits 31A and 31B are already crushed in the vertical direction and have rubber-like elasticity.
- the body 20 is less likely to be deformed rapidly in the vertical direction. Therefore, it becomes difficult to absorb the vibration of the first propeller shaft 10.
- the rubber-like elastic body 20 is formed only when the second slits 32A and 32B are crushed in the vertical direction (t2). It becomes difficult to deform. Therefore, a large vibration is generated from the first propeller shaft 10 to the chassis by the time difference from when the groove bottom D comes into contact with the lateral member 43 (t1) to when the second slits 32A and 32B are crushed in the vertical direction (t2). It can be suppressed from being transmitted.
- the rubber-like elastic body 20 can sufficiently absorb the vibration.
- the groove bottom of the concave groove is not formed in an arc shape, but is formed in a straight line extending in the left-right direction. In this case, it becomes difficult to secure a space for forming the second slit in the rubber-like elastic body.
- the groove bottom portion D of the present embodiment is formed in an arc shape concentric with the shaft hole portion 23, so that the central portions of the concave grooves 24A and 24B in the left-right direction are projected outward in the radial direction.
- a sufficient space for forming the second slits 32A and 32B in the rubber-like elastic body 20 can be secured.
- the fourth slits 34A and 34B are provided at the positions outside the third slits 33A and 33B in the radial direction so that the vibration in the left-right direction can be sufficiently absorbed. ing. This makes it possible to make the vibration absorption characteristics of the top, bottom, left, and right uniform.
- the rubber-like elastic body 20 also deforms in the axial direction.
- the rubber-like elastic body 20 is deformed in the axial direction and easily bends. Then, the rubber-like elastic body 20 may come off from the bracket 21 if the deformation in the axial direction becomes excessive.
- a protrusion P protruding radially inward from the radial outer inner peripheral surface of the third slits 33A and 33B is formed in the vertical central portion of the third slits 33A and 33B. ..
- the protrusion P comes into contact with the inner peripheral surface of the third slit 33A in the radial direction, so that the rubber-like elasticity is further increased.
- the bending of the body 20 can be suppressed. As a result, it is possible to prevent the rubber-like elastic body 20 from falling off from the bracket 21.
- the rubber-like elastic body 20 is deformed in the left-right direction when the protrusions P come into contact with the inner peripheral surfaces of the third slits 33A and 33B in the radial direction. It can be suppressed from overdoing.
- the rubber-like elastic body 20 is suppressed from being deformed in the axial direction by the flat metal plates 26A and 26B embedded along the left and right sides. Further, the rubber-like elastic body 20 reinforced by the metal plates 26A and 26B engages with the second reinforcing rib 46 of the bracket 21, so that the rubber-like elastic body 20 can be reliably prevented from falling out of the bracket 21.
- the above-mentioned basic embodiment can be a modified example or a combination thereof as follows.
- the same reference numerals are used for the same components as those in the above embodiment, and detailed description thereof will be omitted.
- the block body 22 of the first modification has recessed portions 24r formed on the front surface 22a and the rear surface 22b of the central portions 22h on the left and right sides.
- the axial width of the central portion 22h on the left and right sides is formed thin, and the metal plates 26A and 26B are also formed small in accordance with the width of the central portion 22h, so that the propeller shaft is formed in the axial direction and the radial direction.
- the followability to displacement can be improved.
- the tip of the protrusions 27A and 27B formed on the upper and lower sides of the left and right sides of the block body 22 has a tapered tip.
- a surface 27t is formed. That is, the protrusions 27A formed on the upper parts of the left and right sides are formed so that the tip surface 27t is inclined upward, and the protrusions 27B formed on the lower parts of the left and right sides are formed so that the tip surface 27t is inclined downward. It is formed.
- the protrusions 27A and 27B can be easily engaged with the holes 41 of the split vertical member 44.
- recessed grooves 24s are formed not only on the upper and lower sides of the block body 22 but also on the left and right sides, and an L-shaped metal plate 26s is embedded in the leg portion 25. .. Further, in the third modification, the third slits 33A and 33B have the same shape as the first slits 31A and 31B, and the fourth slits 34A and 34B have the same shape as the second slits 32A and 32B.
- the bracket 21 of the fourth modification includes an upper horizontal member 53A extending in the left-right direction and a pair of left-right vertical members 54A and 54B connected to both ends of the horizontal member 53A in the left-right direction. , And is formed in a frame shape. Further, a pair of flanges 52A and 52B extending outward in the left-right direction are formed at the lower ends of the vertical members 54A and 54B on both the left and right sides. A detachable lower horizontal member 53B is provided between the flanges 52A and 52B on both the left and right sides.
- the rubber-like elastic body 20 is mounted in the bracket 21, the lower horizontal member 53B is fitted, and the lower horizontal member 53B is moved to the left and right. Fasten to the chassis with bolts and nuts together with the flanges 52A and 52B.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Motor Power Transmission Devices (AREA)
- Vibration Prevention Devices (AREA)
- Support Of The Bearing (AREA)
Abstract
Description
図11(a)及び図11(b)に示すように、第1変形例のブロック体22は、左右辺の中央部22hの前面22a及び後面22bに形成された窪み部24rを有する。
図11(a)及び図11(b)に示すように、第2変形例では、ブロック体22の左右辺の上部と下部とに形成された突起27A,27Bの先端部に、テーパ状の先端面27tが形成される。すなわち、左右辺の上部に形成された突起27Aは、先端面27tが上側に傾斜するように形成され、左右辺の下部に形成された突起27Bは、先端面27tが下側に傾斜するように形成される。
図12に示すように、第3変形例では、ブロック体22の上下辺だけでなく、左右辺にも凹溝24sが形成され、また、脚部25にL字状の金属プレート26sを埋め込まれる。また、第3変形例では、第3スリット33A,33Bが第1スリット31A,31Bと同じ形状であり、第4スリット34A,34Bが第2スリット32A,32Bと同じ形状である。
図13に示すように、第4変形例のブラケット21は、左右方向に延びる上側の横部材53Aと、その横部材53Aの左右方向の両端部に接続された左右一対の縦部材54A,54Bと、を有し、枠状に形成される。また、左右両側の縦部材54A,54Bの下端部には、左右方向の外側に延びる一対のフランジ52A,52Bが形成される。そして、左右両側のフランジ52A,52B間には、着脱自在な下側の横部材53Bが設けられる。
Claims (8)
- プロペラシャフトを軸支する軸孔部を有するゴム状弾性体と、ゴム状弾性体をシャーシに保持するブラケットとを備え、ゴム状弾性体を、矩形に形成すると共にその矩形のゴム状弾性体の上下辺の中央に凹溝を形成し、ブラケットを、矩形のゴム状弾性体を覆うように矩形に形成したセンターベアリングにおいて、
前記ブラケットは、左右方向に延びて前記凹溝に対向する横部材を有し、
前記凹溝は、前記横部材と上下方向に離間された溝底部を有し、
前記軸孔部と前記溝底部との間の前記ゴム状弾性体には、前記軸孔部の中心を基準とする径方向において、内側に第1スリットが形成され、外側に第2スリットが形成されることを特徴とするセンターベアリング。 - 前記溝底部は、前記プロペラシャフトの上下方向の変位が所定値以上のときに、前記横部材に接触する請求項1記載のセンターベアリング。
- 前記溝底部、前記第1スリット及び前記第2スリットは、前記軸孔部と同心の円弧状にそれぞれ形成される請求項1または2記載のセンターベアリング。
- 前記第2スリットは、前記軸孔部の中心を基準とする周方向において、少なくとも前記第1スリットの一部と重なって配置される請求項1~3いずれかに記載のセンターベアリング。
- 前記ゴム状弾性体には、前記ゴム状弾性体の左右辺に沿って金属プレートが埋め込まれ、
前記金属プレートと前記軸孔部との間の前記ゴム状弾性体には、前記径方向において、内側に第3スリットが形成され、外側に第4スリットが形成される請求項1~4いずれかに記載のセンターベアリング。 - 前記第3スリット及び前記第4スリットは、前記軸孔部と同心の円弧状にそれぞれ形成される請求項5記載のセンターベアリング。
- 前記第4スリットは、前記軸孔部の中心を基準とする周方向において、少なくとも前記第3スリットの一部と重なって配置される請求項5または6記載のセンターベアリング。
- 前記第3スリットの上下方向の中央部分には、前記第3スリットの内周面から前記径方向の内側または外側に突出された突起部が形成される請求項5~7いずれかに記載のセンターベアリング。
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EP20783587.7A EP3950397A4 (en) | 2019-03-29 | 2020-01-16 | CENTRAL LANDING |
AU2020252325A AU2020252325A1 (en) | 2019-03-29 | 2020-01-16 | Center bearing |
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JP2019065411A JP7372041B2 (ja) | 2019-03-29 | 2019-03-29 | センターベアリング |
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Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
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US5829892A (en) * | 1997-06-27 | 1998-11-03 | Dana Corporation | Center bearing bracket and support |
JP2011079394A (ja) | 2009-10-06 | 2011-04-21 | Ud Trucks Corp | 車両用推進軸の支持構造 |
JP2014219049A (ja) | 2013-05-08 | 2014-11-20 | Nok株式会社 | センターベアリングサポート |
JP2017144882A (ja) | 2016-02-17 | 2017-08-24 | 自動車部品工業株式会社 | センターベアリング |
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US6520678B2 (en) * | 2001-03-27 | 2003-02-18 | Spicer Driveshaft, Inc. | Vehicle center bearing assembly including piezo-based device for vibration damping |
US7534048B2 (en) * | 2004-12-31 | 2009-05-19 | Dana Automotive Systems Group, Llc | Center bearing assembly for rotatably supporting a shaft at varying angles relative to a support surface |
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2019
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Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
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US5829892A (en) * | 1997-06-27 | 1998-11-03 | Dana Corporation | Center bearing bracket and support |
JP2011079394A (ja) | 2009-10-06 | 2011-04-21 | Ud Trucks Corp | 車両用推進軸の支持構造 |
JP2014219049A (ja) | 2013-05-08 | 2014-11-20 | Nok株式会社 | センターベアリングサポート |
JP2017144882A (ja) | 2016-02-17 | 2017-08-24 | 自動車部品工業株式会社 | センターベアリング |
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AU2020252325A1 (en) | 2021-08-12 |
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