WO2016111111A1 - Center bearing support - Google Patents
Center bearing support Download PDFInfo
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- WO2016111111A1 WO2016111111A1 PCT/JP2015/084594 JP2015084594W WO2016111111A1 WO 2016111111 A1 WO2016111111 A1 WO 2016111111A1 JP 2015084594 W JP2015084594 W JP 2015084594W WO 2016111111 A1 WO2016111111 A1 WO 2016111111A1
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- center bearing
- support member
- elastic support
- propeller shaft
- cross
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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
Definitions
- the present invention relates to a center bearing support that elastically supports a center bearing that rotatably supports a propeller shaft of an automobile on the lower side of a vehicle body.
- center bearing supports that are attached to the lower surface of a vehicle body and elastically support a center bearing mounted on a propeller shaft. That is, the center bearing support 100 shown in FIGS. 3 and 4 elastically connects the outer ring 101, the inner ring 102 disposed on the inner periphery of the outer ring 101, and the outer ring 101 and the inner ring 102. And an elastic support member 103.
- the outer ring 101 is fitted on the inner peripheral surface of the support ring 111 of the lower bracket 110 of the vehicle body, and the inner ring 102 is fitted on the outer race 121 of the center bearing 120.
- a center bearing 120 mounted on a propeller shaft (not shown) is elastically supported on the lower side of the vehicle body via an elastic support member 103 made of a rubber-like elastic material (rubber material or synthetic resin material having rubber-like elasticity).
- the elastic support member 103 performs vibration absorption and buffering between the propeller shaft side and the vehicle body side during traveling (see, for example, Patent Document 1 below).
- the resonance frequency of a spring-mass system in which the propeller shaft is a mass body and the elastic support member 103 is a spring generally exists in the vicinity of 10 to 30 Hz.
- the vibration frequency of the propeller shaft passes through this frequency band, there is a problem that the amplitude of the swing of the propeller shaft increases due to resonance.
- the center bearing support 100 illustrated in FIGS. 3 and 4 has an elastic support member 103 having an annular shape and the same cross-sectional shape, that is, cut along an axial plane passing through the line AA ′ in FIG. 4 and the cross-sectional shape cut along the plane in the axial direction passing through the line BB ′ in FIG. 3 are the shapes shown in FIG. 4, but as means for preventing the above-mentioned swinging,
- the elastic support member is formed into a non-circular thick wall shape, and a large number of holes (axial through holes) are opened in the elastic support member to change the spring characteristics of the elastic support member in the circumferential direction.
- Patent Document 2 there is known a technique for suppressing the swing due to resonance (for example, see Patent Document 2 below).
- the center bearing support is located on the underside of the vehicle body and is always exposed to the external environment, such as the muddy water coming in, the ones that have tickled elastic support members are immediately clogged with stepping stones and mud. If icing occurs within the edge, the durability of the elastic support member may be reduced.
- JP-A-8-216710 Japanese Patent Publication No. 8-33164
- the present invention has been made in view of the above points, and its technical problem is to suppress the swing of the propeller shaft due to resonance.
- the center bearing support according to the invention of claim 1 is mounted on the outer periphery of the propeller shaft on the inner periphery of the outer ring fixed to the vehicle body side.
- the center bearing support provided through an annular elastic support member made of a rubber-like elastic material and bent into a convex shape toward the front side of the vehicle, the outer ring and the inner ring The length of the cross-section of the elastic support member between them is alternately changed in the circumferential direction.
- the rubber-like elastic material is a rubber material or a synthetic resin material having rubber-like elasticity.
- the elastic support member travels by elastically connecting the outer ring fixed to the vehicle body side and the inner ring holding the center bearing attached to the outer periphery of the propeller shaft. Vibration absorption and buffering are performed between the propeller shaft side and the vehicle body side.
- the elastic support members have different spring constants by changing the length of the cross section of the elastic support member alternately in the circumferential direction, that is, the portion having a relatively long cross section length of the elastic support member is a spring. Since the spring constant is high in the portion where the constant is low and the cross-sectional length of the elastic support member is relatively short, the resonance frequency is alternately changed in the circumferential direction, and the whirling of the propeller shaft is suppressed.
- the spring constant changes alternately in the circumferential direction by changing the length of the cross section of the elastic support member alternately in the circumferential direction. Can be suppressed.
- FIG. 1 is a cross-sectional view showing a preferred embodiment of a center bearing support according to the present invention together with a center bearing, wherein (A) is a cross-sectional view cut along an axial plane passing through the line AA ′ in FIG. 2 is a cross-sectional view taken along a plane in the axial direction passing through line BB ′ in FIG. It is a perspective view which shows an example of the conventional center bearing support with a bracket.
- FIG. 4 is a cross-sectional view of an example of a conventional center bearing support, taken along an axial plane passing along the line A-A ′ or the line B-B ′ in FIG. 3 together with the center bearing.
- the left side is the front side of the vehicle, and the right side is the rear side.
- reference numeral 2 shown in FIG. 1 is a bracket fixed to the vehicle body side
- reference numeral 3 shown in FIG. 2 is a center bearing.
- the center bearing support 1 is disposed on the inner peripheral surface of the support ring 21 of the bracket 2 attached to the lower side of the vehicle body, and disposed on the inner periphery of the outer ring 11.
- the inner ring 12 is fitted into the outer race 31 of the center bearing 3 to be mounted, and the elastic support member 13 is elastically connected between the outer ring 11 and the inner ring 12.
- the center bearing 3 is a ball bearing having an outer race 31 and an inner race 32 arranged concentrically with each other, and a number of steel balls 33 rotatably held at equal intervals in the circumferential direction. 33 and the outer race 31 and the inner race 32 are lubricated with grease (not shown).
- the outer ring 11 and the inner ring 12 are made of metal such as steel, and the elastic support member 13 is formed of a rubber-like elastic material (rubber material or synthetic resin material having rubber-like elasticity). .
- the outer peripheral portion 131 of the elastic support member 13 is integrally vulcanized and bonded to the outer ring 11, and the inner peripheral portion 132 is integrally vulcanized and bonded to the outer peripheral surface of the inner ring 12, and the outer peripheral portion 131 and the inner peripheral portion 132 are combined. Between, a bellows-shaped bent portion 133 bent in a substantially U-shaped convex section toward the front side is formed.
- the elastic support member 13 has a horizontal length in the horizontal direction from the outer peripheral part 131 vulcanized and bonded to the outer ring 11 to the inner peripheral part 132 vulcanized and bonded to the inner ring 12 through the bellows-shaped bent part 133.
- the cross section that is, the cross section shown in FIG. 2A is relatively short, and the vertical cross section, that is, the cross section shown in FIG. 2B, is relatively long.
- the bellows-shaped bent portion 133 of the elastic support member 13 has a relatively low protruding height to the front side in both horizontal side portions 133a and 133a, and to the front side in the upper and lower side portions 133b and 133b of the inner ring 12.
- the height of the raised portion is relatively high, and the raised height (the length of the cross section) of the portion 133c between the horizontal side portion 133a and the upper and lower side portions 133b changes gently.
- the elastic support member 13 includes a portion having a relatively short cross section, that is, a portion 133a having a relatively low height, and a portion having a relatively long cross section, that is, a portion having a relatively high height.
- 133b are alternately arranged at intervals of 90 ° in the circumferential direction, and the lengths (cross-sectional shapes) of the cross sections are the same at 180 ° symmetrical positions in the circumferential direction.
- a portion with a relatively short cross-section 133a has a relatively high spring constant and a relatively long cross-section with respect to a direction (left-right direction) in which the portion 133a is symmetrical 180 ° in the circumferential direction. Since the spring constant is relatively low with respect to a direction in which 133b exists symmetrically in the circumferential direction 180 ° (vertical direction), the high spring region and the low spring region are alternately distributed at intervals of 90 ° in the circumferential direction. It will be.
- the center bearing support 1 having the above configuration elastically supports the center bearing 3 on the bracket 2 on the vehicle body side, and when vibration occurs on the propeller shaft supported via the center bearing 3,
- the bellows-shaped bent portion 14c of the elastic support member 13 is repeatedly bent and stretched along with the relative eccentric motion with the outer ring 11 to effectively insulate vibration transmission to the vehicle body side.
- this vibration frequency passes through a resonance frequency band of a spring-mass system in which the propeller shaft is a mass body and the elastic support member 13 is a spring. Will do.
- the center bearing support 1 configured as described above has a high spring constant and a low spring constant alternately at 90 ° intervals in the circumferential direction due to the relatively short portion 133a and the relatively long portion 133b. Since the spring constant is set, even if the propeller shaft tries to swing, the resonance frequency repeatedly increases and decreases every 90 °. Therefore, the swing of the propeller shaft due to resonance is effectively suppressed.
- the elastic support member 13 is not provided with a tick or the like for changing the spring constant, endurance due to stepping stones and mud being clogged inside or icing inside the tickling. There is no risk of deterioration.
- the elastic support member 13 has the same thickness of the bellows-shaped bent portion 14c in the entire circumferential direction, there is no partial stress concentration even when subjected to bending and stretching deformation due to the swing of the propeller shaft. In this respect, there is no fear of a decrease in durability.
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Motor Power Transmission Devices (AREA)
- Support Of The Bearing (AREA)
Abstract
The purpose of the present invention is to suppress whirling of a propeller shaft caused by resonance. To this end, the present invention provides a center bearing support (1) configured by attaching an inner ring (12), which holds a center bearing (3) mounted on the outer periphery of a propeller shaft, to the inner periphery of an outer ring (11), which is fixed to the vehicle body side, via an annular elastic support member (13) which is made of a rubber-like elastic material and bent in a convex shape toward the front side of the vehicle, wherein the cross-sectional length of the elastic support member (13) between the outer ring (11) and the inner ring (12) is alternately changed in the circumferential direction so that the spring constant of the elastic support member changes alternately in the circumferential direction.
Description
本発明は、自動車のプロペラシャフトを回転自在に支持するセンターベアリングを、車体の下側に弾性的に支持するセンターベアリングサポートに関する。
The present invention relates to a center bearing support that elastically supports a center bearing that rotatably supports a propeller shaft of an automobile on the lower side of a vehicle body.
車体の下面に取り付けられて、プロペラシャフトに装着されるセンターベアリングを弾性的に支持するセンターベアリングサポートとして、従来から、例えば図３及び図４に示すようなものが知られている。すなわち図３、図４に示すセンターベアリングサポート１００は、外環１０１と、この外環１０１の内周に配置された内環１０２と、外環１０１と内環１０２の間を弾性的に連結する弾性支持部材１０３とを有する。
Conventionally, for example, those shown in FIGS. 3 and 4 are known as center bearing supports that are attached to the lower surface of a vehicle body and elastically support a center bearing mounted on a propeller shaft. That is, the center bearing support 100 shown in FIGS. 3 and 4 elastically connects the outer ring 101, the inner ring 102 disposed on the inner periphery of the outer ring 101, and the outer ring 101 and the inner ring 102. And an elastic support member 103.
そしてこのセンターベアリングサポート１００は、外環１０１が車体の下側のブラケット１１０の支持環１１１の内周面に嵌着され、内環１０２がセンターベアリング１２０のアウターレース１２１に嵌着されることによって、不図示のプロペラシャフトに装着されるセンターベアリング１２０を車体の下側にゴム状弾性材料（ゴム材料又はゴム状弾性を有する合成樹脂材料）からなる弾性支持部材１０３を介して弾性的に支持し、この弾性支持部材１０３によって、走行中におけるプロペラシャフト側と車体側との間で振動吸収及び緩衝を行うものである（例えば下記の特許文献１参照）。
In the center bearing support 100, the outer ring 101 is fitted on the inner peripheral surface of the support ring 111 of the lower bracket 110 of the vehicle body, and the inner ring 102 is fitted on the outer race 121 of the center bearing 120. A center bearing 120 mounted on a propeller shaft (not shown) is elastically supported on the lower side of the vehicle body via an elastic support member 103 made of a rubber-like elastic material (rubber material or synthetic resin material having rubber-like elasticity). The elastic support member 103 performs vibration absorption and buffering between the propeller shaft side and the vehicle body side during traveling (see, for example, Patent Document 1 below).
ところで、この種のセンターベアリングサポート１００においては、プロペラシャフトを質量体、弾性支持部材１０３をばねとするばね－マス系の共振周波数が一般的に１０～３０Ｈｚ付近に存在するため、車両発進時などにプロペラシャフトの振動周波数がこの周波数帯域を通過する過程で、共振によってプロペラシャフトの振れ回りの振幅が増大してしまう問題がある。
By the way, in this type of center bearing support 100, the resonance frequency of a spring-mass system in which the propeller shaft is a mass body and the elastic support member 103 is a spring generally exists in the vicinity of 10 to 30 Hz. In addition, in the process in which the vibration frequency of the propeller shaft passes through this frequency band, there is a problem that the amplitude of the swing of the propeller shaft increases due to resonance.
図３、図４に例示したセンターベアリングサポート１００は、弾性支持部材１０３が円環状であって断面形状が全周同一であり、すなわち図３のＡ－Ａ’線を通る軸方向の平面で切断した断面形状と、図３のＢ－Ｂ’線を通る軸方向の平面で切断した断面形状は、共に図４に示す形状となっているが、上述のような振れ回りを防止する手段としては、弾性支持部材を非円形の厚肉形状に形成すると共に、この弾性支持部材に多数のすぐり（軸方向の貫通孔）を開設して周方向に対して、弾性支持部材のばね特性を変化させることで共振による振れ回りを抑制する手法が知られている（例えば下記の特許文献２参照）。
The center bearing support 100 illustrated in FIGS. 3 and 4 has an elastic support member 103 having an annular shape and the same cross-sectional shape, that is, cut along an axial plane passing through the line AA ′ in FIG. 4 and the cross-sectional shape cut along the plane in the axial direction passing through the line BB ′ in FIG. 3 are the shapes shown in FIG. 4, but as means for preventing the above-mentioned swinging, The elastic support member is formed into a non-circular thick wall shape, and a large number of holes (axial through holes) are opened in the elastic support member to change the spring characteristics of the elastic support member in the circumferential direction. Thus, there is known a technique for suppressing the swing due to resonance (for example, see Patent Document 2 below).
しかしながら、センターベアリングサポートは車体の下側にあって、常に泥水の飛来といった外部環境にさらされているため、弾性支持部材にすぐりを開設したものは、走行中の飛石や泥がすぐり内部に詰まったり、すぐり内で着氷を生じたりすると、弾性支持部材の耐久性が低下するおそれがある。
However, since the center bearing support is located on the underside of the vehicle body and is always exposed to the external environment, such as the muddy water coming in, the ones that have tickled elastic support members are immediately clogged with stepping stones and mud. If icing occurs within the edge, the durability of the elastic support member may be reduced.
本発明は、以上のような点に鑑みてなされたものであって、その技術的課題は、共振によるプロペラシャフトの振れ回りを抑制することにある。
The present invention has been made in view of the above points, and its technical problem is to suppress the swing of the propeller shaft due to resonance.
上述した技術的課題を有効に解決するための手段として、請求項１の発明に係るセンターベアリングサポートは、車体側に固定される外環の内周に、プロペラシャフトの外周に装着されるセンターベアリングを保持する内環が、ゴム状弾性材料からなり車両のフロント側へ向けて凸の形状に屈曲した環状の弾性支持部材を介して設けられたセンターベアリングサポートにおいて、前記外環と前記内環との間での前記弾性支持部材の断面の長さを円周方向交互に変化させたことを特徴とするものである。なお、ゴム状弾性材料とはゴム材料又はゴム状弾性を有する合成樹脂材料のことである。
As a means for effectively solving the technical problem described above, the center bearing support according to the invention of claim 1 is mounted on the outer periphery of the propeller shaft on the inner periphery of the outer ring fixed to the vehicle body side. In the center bearing support provided through an annular elastic support member made of a rubber-like elastic material and bent into a convex shape toward the front side of the vehicle, the outer ring and the inner ring The length of the cross-section of the elastic support member between them is alternately changed in the circumferential direction. The rubber-like elastic material is a rubber material or a synthetic resin material having rubber-like elasticity.
上記構成のセンターベアリングサポートにおいて、弾性支持部材は、車体側に固定される外環と、プロペラシャフトの外周に取り付けられるセンターベアリングを保持する内環との間を弾性的に連結することにより、走行中におけるプロペラシャフト側と車体側との間で振動吸収及び緩衝を行うものである。そしてこの弾性支持部材の断面の長さが円周方向交互に変化することによって、円周方向交互に異なるばね定数を有し、すなわち弾性支持部材の断面の長さが相対的に長い部分はばね定数が低く、弾性支持部材の断面の長さが相対的に短い部分はばね定数が高くなるため、共振周波数が円周方向交互に変化し、プロペラシャフトの振れ回りが抑制される。
In the center bearing support configured as described above, the elastic support member travels by elastically connecting the outer ring fixed to the vehicle body side and the inner ring holding the center bearing attached to the outer periphery of the propeller shaft. Vibration absorption and buffering are performed between the propeller shaft side and the vehicle body side. The elastic support members have different spring constants by changing the length of the cross section of the elastic support member alternately in the circumferential direction, that is, the portion having a relatively long cross section length of the elastic support member is a spring. Since the spring constant is high in the portion where the constant is low and the cross-sectional length of the elastic support member is relatively short, the resonance frequency is alternately changed in the circumferential direction, and the whirling of the propeller shaft is suppressed.
本発明に係るセンターベアリングサポートによれば、弾性支持部材の断面の長さが円周方向交互に変化することによって、そのばね定数が円周方向交互に変化するので、共振によるプロペラシャフトの振れ回りを抑制することができる。
According to the center bearing support according to the present invention, the spring constant changes alternately in the circumferential direction by changing the length of the cross section of the elastic support member alternately in the circumferential direction. Can be suppressed.
以下、本発明に係るセンターベアリングサポートの好ましい実施の形態について、図１及び図２を参照しながら説明する。なお、図における左側が車両のフロント側、右側がリア側である。
Hereinafter, a preferred embodiment of the center bearing support according to the present invention will be described with reference to FIG. 1 and FIG. In the figure, the left side is the front side of the vehicle, and the right side is the rear side.
図１及び図２に示す参照符号１はセンターベアリングサポート、図１に示す参照符号２は車体側に固定されるブラケット、図２に示す参照符号３はセンターベアリングである。
1 and 2 are a center bearing support, reference numeral 2 shown in FIG. 1 is a bracket fixed to the vehicle body side, and reference numeral 3 shown in FIG. 2 is a center bearing.
センターベアリングサポート１は、車体の下側に取り付けられるブラケット２の支持環２１の内周面に嵌着される外環１１と、この外環１１の内周に配置され、不図示のプロペラシャフトに装着されるセンターベアリング３のアウターレース３１に嵌合される内環１２と、外環１１と内環１２の間を弾性的に連結する弾性支持部材１３とを有する。なお、センターベアリング３は、互いに同心配置されたアウターレース３１及びインナーレース３２と、その間に円周方向等間隔で回転自在に保持された多数の鋼球３３とを有するボールベアリングであり、鋼球３３とアウターレース３１及びインナーレース３２との間は、不図示のグリースにより潤滑されている。
The center bearing support 1 is disposed on the inner peripheral surface of the support ring 21 of the bracket 2 attached to the lower side of the vehicle body, and disposed on the inner periphery of the outer ring 11. The inner ring 12 is fitted into the outer race 31 of the center bearing 3 to be mounted, and the elastic support member 13 is elastically connected between the outer ring 11 and the inner ring 12. The center bearing 3 is a ball bearing having an outer race 31 and an inner race 32 arranged concentrically with each other, and a number of steel balls 33 rotatably held at equal intervals in the circumferential direction. 33 and the outer race 31 and the inner race 32 are lubricated with grease (not shown).
外環１１及び内環１２は鋼材等の金属で製作されたものであり、弾性支持部材１３は、ゴム状弾性材料（ゴム材料又はゴム状弾性を有する合成樹脂材料）で成形されたものである。弾性支持部材１３の外周部１３１は外環１１に一体的に加硫接着され、内周部１３２は、内環１２の外周面に一体的に加硫接着され、外周部１３１と内周部１３２の間は、フロント側へ向けて凸の断面略Ｕ字形に屈曲したベロー状屈曲部１３３となっている。
The outer ring 11 and the inner ring 12 are made of metal such as steel, and the elastic support member 13 is formed of a rubber-like elastic material (rubber material or synthetic resin material having rubber-like elasticity). . The outer peripheral portion 131 of the elastic support member 13 is integrally vulcanized and bonded to the outer ring 11, and the inner peripheral portion 132 is integrally vulcanized and bonded to the outer peripheral surface of the inner ring 12, and the outer peripheral portion 131 and the inner peripheral portion 132 are combined. Between, a bellows-shaped bent portion 133 bent in a substantially U-shaped convex section toward the front side is formed.
弾性支持部材１３は、外環１１に加硫接着された外周部１３１からベロー状屈曲部１３３を経て内環１２に加硫接着された内周部１３２に至る断面の長さが、水平方向の断面すなわち図２の（Ａ）に示す断面において相対的に短く、上下方向の断面すなわち図２の（Ｂ）に示す断面において相対的に長くなっている。言い換えれば、弾性支持部材１３のベロー状屈曲部１３３は、水平方向両側部分１３３ａ，１３３ａにおいてフロント側への隆起高さが相対的に低く、内環１２の上下両側部分１３３ｂ，１３３ｂにおいてフロント側への隆起高さが相対的に高く、水平方向両側部分１３３ａと上下両側部分１３３ｂとの間の部分１３３ｃは隆起高さ（断面の長さ）がなだらかに変化している。
The elastic support member 13 has a horizontal length in the horizontal direction from the outer peripheral part 131 vulcanized and bonded to the outer ring 11 to the inner peripheral part 132 vulcanized and bonded to the inner ring 12 through the bellows-shaped bent part 133. The cross section, that is, the cross section shown in FIG. 2A is relatively short, and the vertical cross section, that is, the cross section shown in FIG. 2B, is relatively long. In other words, the bellows-shaped bent portion 133 of the elastic support member 13 has a relatively low protruding height to the front side in both horizontal side portions 133a and 133a, and to the front side in the upper and lower side portions 133b and 133b of the inner ring 12. The height of the raised portion is relatively high, and the raised height (the length of the cross section) of the portion 133c between the horizontal side portion 133a and the upper and lower side portions 133b changes gently.
したがって弾性支持部材１３は、断面の長さが相対的に短い部分すなわち隆起高さが相対的に低い部分１３３ａと、断面の長さが相対的に長い部分すなわち隆起高さが相対的に高い部分１３３ｂを、円周方向９０°間隔で交互に有するものであり、円周方向１８０°対称位置で断面の長さ（断面形状）が互いに同じとなっている。
Therefore, the elastic support member 13 includes a portion having a relatively short cross section, that is, a portion 133a having a relatively low height, and a portion having a relatively long cross section, that is, a portion having a relatively high height. 133b are alternately arranged at intervals of 90 ° in the circumferential direction, and the lengths (cross-sectional shapes) of the cross sections are the same at 180 ° symmetrical positions in the circumferential direction.
そして、断面の長さが相対的に短い部分１３３ａが円周方向１８０°対称に存在する方向（左右方向）に対しては相対的にばね定数が高く、断面の長さが相対的に長い部分１３３ｂが円周方向１８０°対称に存在する方向（上下方向）に対しては相対的にばね定数が低くなることから、高ばね領域と低ばね領域が円周方向９０°間隔で交互に分布することになる。
A portion with a relatively short cross-section 133a has a relatively high spring constant and a relatively long cross-section with respect to a direction (left-right direction) in which the portion 133a is symmetrical 180 ° in the circumferential direction. Since the spring constant is relatively low with respect to a direction in which 133b exists symmetrically in the circumferential direction 180 ° (vertical direction), the high spring region and the low spring region are alternately distributed at intervals of 90 ° in the circumferential direction. It will be.
以上の構成を備えるセンターベアリングサポート１は、センターベアリング３を車体側のブラケット２に弾性的に支持し、このセンターベアリング３を介して支持されたプロペラシャフトに振動が発生した場合、内環１２と外環１１との相対偏心運動に伴って弾性支持部材１３のベロー状屈曲部１４ｃが反復的に屈伸し、車体側への振動伝達を有効に絶縁するものである。
The center bearing support 1 having the above configuration elastically supports the center bearing 3 on the bracket 2 on the vehicle body side, and when vibration occurs on the propeller shaft supported via the center bearing 3, The bellows-shaped bent portion 14c of the elastic support member 13 is repeatedly bent and stretched along with the relative eccentric motion with the outer ring 11 to effectively insulate vibration transmission to the vehicle body side.
そして例えば車両発進時などに、プロペラシャフトの振動周波数が高くなっていく過程で、この振動周波数は、プロペラシャフトを質量体、弾性支持部材１３をばねとするばね－マス系の共振周波数帯域を通過することになる。しかしながら上記構成のセンターベアリングサポート１は、弾性支持部材１３に、断面の長さが相対的に短い部分１３３ａと相対的に長い部分１３３ｂによって、円周方向９０°間隔で交互に高ばね定数と低ばね定数が設定されているため、プロペラシャフトが振れ回ろうとしても回転角が９０°毎に共振周波数が高くなったり低くなったりを繰り返すことになる。したがって共振によるプロペラシャフトの振れ回りが有効に抑制される。
In the process of increasing the propeller shaft vibration frequency, for example, when the vehicle starts, this vibration frequency passes through a resonance frequency band of a spring-mass system in which the propeller shaft is a mass body and the elastic support member 13 is a spring. Will do. However, the center bearing support 1 configured as described above has a high spring constant and a low spring constant alternately at 90 ° intervals in the circumferential direction due to the relatively short portion 133a and the relatively long portion 133b. Since the spring constant is set, even if the propeller shaft tries to swing, the resonance frequency repeatedly increases and decreases every 90 °. Therefore, the swing of the propeller shaft due to resonance is effectively suppressed.
また、弾性支持部材１３には、ばね定数を変化させるためのすぐり等は開設されていないので、走行中の飛石や泥がすぐり内部に詰まったり、すぐり内で着氷を生じたりすることによる耐久性の低下のおそれがない。
Further, since the elastic support member 13 is not provided with a tick or the like for changing the spring constant, endurance due to stepping stones and mud being clogged inside or icing inside the tickling. There is no risk of deterioration.
しかも弾性支持部材１３は、ベロー状屈曲部１４ｃの肉厚は円周方向全域で略同一であるため、プロペラシャフトの振れ回りによる屈伸変形を受けても部分的に応力集中を生じることがなく、この点でも耐久性の低下のおそれがない。
Moreover, since the elastic support member 13 has the same thickness of the bellows-shaped bent portion 14c in the entire circumferential direction, there is no partial stress concentration even when subjected to bending and stretching deformation due to the swing of the propeller shaft. In this respect, there is no fear of a decrease in durability.
１ センターベアリングサポート
１１ 外環
１２ 内環
１３ 弾性支持部材
１３３ ベロー状屈曲部
１３３ａ 隆起高さが相対的に低い部分
１３３ｂ 隆起高さが相対的に高い部分
２ ブラケット
３ センターベアリング DESCRIPTION OFSYMBOLS 1 Center bearing support 11 Outer ring 12 Inner ring 13 Elastic support member 133 Bellow-shaped bent part 133a A part with a relatively low raised height 133b A part with a relatively high raised height 2 Bracket 3 Center bearing
１１ 外環
１２ 内環
１３ 弾性支持部材
１３３ ベロー状屈曲部
１３３ａ 隆起高さが相対的に低い部分
１３３ｂ 隆起高さが相対的に高い部分
２ ブラケット
３ センターベアリング DESCRIPTION OF
Claims (1)
- 車体側に固定される外環の内周に、プロペラシャフトの外周に装着されるセンターベアリングを保持する内環が、ゴム状弾性材料からなり車両のフロント側へ向けて凸の形状に屈曲した環状の弾性支持部材を介して設けられたセンターベアリングサポートにおいて、前記外環と前記内環との間での前記弾性支持部材の断面の長さを円周方向交互に変化させたことを特徴とするセンターベアリングサポート。 An inner ring that holds a center bearing attached to the outer periphery of the propeller shaft is formed of a rubber-like elastic material and is bent in a convex shape toward the front side of the vehicle on the inner circumference of the outer ring fixed to the vehicle body side In the center bearing support provided via the elastic support member, the length of the cross section of the elastic support member between the outer ring and the inner ring is alternately changed in the circumferential direction. Center bearing support.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2015-000148 | 2015-01-05 | ||
| JP2015000148A JP6538354B2 (en) | 2015-01-05 | 2015-01-05 | Center bearing support |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2016111111A1 true WO2016111111A1 (en) | 2016-07-14 |
Family
ID=56355813
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/JP2015/084594 WO2016111111A1 (en) | 2015-01-05 | 2015-12-10 | Center bearing support |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP6538354B2 (en) |
| WO (1) | WO2016111111A1 (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002219954A (en) * | 2001-01-24 | 2002-08-06 | Fuji Heavy Ind Ltd | Support device for propeller shaft for vehicle |
| JP2007246013A (en) * | 2006-03-17 | 2007-09-27 | Nok Corp | Center bearing support |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4331793Y1 (en) * | 1965-04-09 | 1968-12-24 | ||
| JPS6269622U (en) * | 1985-10-23 | 1987-05-01 |
-
2015
- 2015-01-05 JP JP2015000148A patent/JP6538354B2/en active Active
- 2015-12-10 WO PCT/JP2015/084594 patent/WO2016111111A1/en active Application Filing
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002219954A (en) * | 2001-01-24 | 2002-08-06 | Fuji Heavy Ind Ltd | Support device for propeller shaft for vehicle |
| JP2007246013A (en) * | 2006-03-17 | 2007-09-27 | Nok Corp | Center bearing support |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2016124423A (en) | 2016-07-11 |
| JP6538354B2 (en) | 2019-07-03 |
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