JPH0626766Y2 - Rubber gear - Google Patents

Description

【考案の詳細な説明】 ［産業上の利用分野］ 本考案は、駆動側、被駆動側に限らず駆動時に防振、防
音効果をもたらすゴム入り歯車に関する。[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a rubber-loaded gear that provides vibration and soundproofing effects when driven, not limited to the driving side and the driven side.

［従来の技術］ 従来、全金属製歯車を駆動歯車および被駆動歯車として
使用して駆動した場合、歯車同志の歯当たりによりギヤ
のうなり音、ガーという音、ギヤ振動などの騒音や振動
が発生している。[Prior Art] Conventionally, when an all-metal gear is used as a driving gear and a driven gear, it is driven by a tooth contact between the gears, resulting in gear roaring noise, jar noise, gear vibration, and other noises and vibrations. is doing.

これは歯車全体が金属製であるため材質自体が衝撃や振
動などを減衰させる性質をもたないためである。この振
動や騒音を抑制するために金属製以外に樹脂製の歯車も
あるが金属にくらべ強度等の機械的性質の点で問題があ
り、小型で特殊な用途以外は利用されていないのが現状
である。This is because the entire gear is made of metal, and the material itself does not have the property of damping shocks and vibrations. In order to suppress this vibration and noise, there are resin gears other than metal gears, but there is a problem with mechanical properties such as strength compared with metal, and it is currently used only for small size and special applications. Is.

［考案が解決しようとする課題］ 本考案は、前記の事情に鑑みてなされたもので、金属製
の歯車に減衰性能を付与することにより騒音や振動など
を低減した歯車を提供することを目的とする。[Problems to be Solved by the Invention] The present invention has been made in view of the above circumstances, and an object thereof is to provide a gear in which noise and vibration are reduced by imparting damping performance to a metal gear. And

［課題を解決するための手段］ 本考案のゴム入り歯車は、軸芯部を有する輪状のインナ
ー部材と、 該インナー部材の外周面に設けられた予備圧縮されたゴ
ム状弾性部材と、 該弾性部材の外周面側に位置し、該インナー部材とで該
弾性部材を径方向に圧縮するとともに、外周面が該弾性
部材を該インナー部材とで圧縮している状態で芯出し加
工された輪状のアウター部材と、 該アウター部材の芯出し加工された外周面に挿着され、
外周縁部に歯部を有する輪状のギヤ部とからなることを
特徴とする。[Means for Solving the Problems] A rubber-containing gear of the present invention comprises a ring-shaped inner member having a shaft core portion, a pre-compressed rubber-like elastic member provided on an outer peripheral surface of the inner member, and the elastic member. A ring-shaped member which is located on the outer peripheral surface side of the member and which is radially centered with the inner member and which is centered while the outer peripheral surface is compressing the elastic member with the inner member. An outer member and a centering outer peripheral surface of the outer member,
It is characterized by comprising a ring-shaped gear portion having a tooth portion on the outer peripheral edge portion.

このゴム入り歯車は、歯面と歯車軸との間に圧縮弾性部
材を挿入して歯面を弾性支持しているので駆動時に歯面
の歯当たりにより生じる振動や騒音などを弾性部材が吸
収する。In this rubber-filled gear, a compression elastic member is inserted between the tooth surface and the gear shaft to elastically support the tooth surface, so that the elastic member absorbs vibration and noise generated by tooth contact of the tooth surface during driving. .

このゴム入り歯車は、インナー部材と、該インナー部材
の外周縁面に固着された弾性部材と、該弾性部材の外周
縁面に固着されたアウター部材および該アウター部材の
外周縁面に固着されたギヤ部とが一体に組付けられて構
成されている。This rubber-containing gear is fixed to an inner member, an elastic member fixed to the outer peripheral surface of the inner member, an outer member fixed to the outer peripheral surface of the elastic member, and an outer peripheral surface of the outer member. The gear unit and the gear unit are integrally assembled.

インナー部材はほぼ中心に歯車の軸が挿入される軸芯部
をもつ輪状の金属部材である。このインナー部材の外周
面には弾性部材が固着される。この軸芯部は、予めイン
ナー部材に圧入して形成することも、またインナー部材
とアウター部材とを組付けた後に圧入して形成してもよ
い。インナー部材の外周面は、挿着される弾性部材の形
状に相応する形状に加工されている。またアウター部材
の内側周面もインナー部材と対になるような形状に加工
され、弾性部材が挿入される空隙を形成する。The inner member is a ring-shaped metal member having a shaft core portion into which the shaft of the gear is inserted, substantially at the center. An elastic member is fixed to the outer peripheral surface of the inner member. The shaft core portion may be formed by press-fitting the inner member in advance, or may be formed by assembling the inner member and the outer member and then press-fitting. The outer peripheral surface of the inner member is processed into a shape corresponding to the shape of the elastic member to be inserted. Further, the inner peripheral surface of the outer member is also processed into a shape that makes a pair with the inner member to form a space into which the elastic member is inserted.

弾性部材は、インナー部材とアウター部材の間に形成さ
れる空隙に、たとえばゴムの様な弾性部材を圧入して加
硫するか、またはゴムをインナー部材に接着してアウタ
ー部材を絞り加工をおこなって弾性部材を予備圧縮した
状態で挿着させる。この弾性部材の形状は、通常リング
状のものが用いられるが、特に大トルクが加わる場合に
は波型の異形形状にすることが好ましい。この弾性部材
を波形にすることにより弾性部材に加わる力を、剪断方
向から圧縮方向に変換することができ、弾性部材の耐久
性を大幅に向上させることができる。The elastic member is obtained by press-fitting an elastic member such as rubber into a space formed between the inner member and the outer member for vulcanization, or adhering rubber to the inner member to squeeze the outer member. The elastic member is pre-compressed and inserted. The elastic member usually has a ring shape, but it is preferable to have a corrugated irregular shape particularly when a large torque is applied. By making this elastic member corrugated, the force applied to the elastic member can be converted from the shear direction to the compression direction, and the durability of the elastic member can be greatly improved.

アウター部材は輪状で内周面で前記の弾性部材を径方向
に圧縮した状態で組付けられる。その外周面は、ギヤ部
の軸芯を合わせて挿着できるように枠部を形成した後芯
出し加工が施される。The outer member is ring-shaped and is assembled in a state where the elastic member is radially compressed on the inner peripheral surface. The outer peripheral surface is subjected to centering processing after forming a frame portion so that the shaft center of the gear portion can be inserted and fitted.

ギヤ部は外周縁部に所定の歯数をもつ輪状で、前記のア
ウター部材の外周面に圧入固定される。The gear portion has a ring shape having a predetermined number of teeth on the outer peripheral edge portion, and is press-fitted and fixed to the outer peripheral surface of the outer member.

［作用］ 本考案のゴム入り歯車は、インナー部材とアウター部材
の間に圧縮された弾性部材が配置されている。この弾性
部材がギヤ歯面をギヤ軸より弾性支持することとなり、
全金属製の歯車とは異なり弾性部材が振動などを吸収し
て減衰性能を付与することができる。そのため歯車の駆
動時に発生するギヤ振動、ギヤのうなり音、ガーという
音を防止するができる。また、アウター部材の芯出しを
予備圧縮をあたえた弾性部材を組付けた後におこない、
かつそのアウター部材にギヤ部材を圧入固定しているた
め、ギヤの寸法精度が高い。[Operation] In the rubber-loaded gear of the present invention, the compressed elastic member is arranged between the inner member and the outer member. This elastic member elastically supports the gear tooth surface from the gear shaft,
Unlike a gear made of all metal, the elastic member can absorb vibrations and the like to provide damping performance. Therefore, it is possible to prevent gear vibration, gear humming, and rattling noise that occur when the gears are driven. In addition, the outer member is centered after the elastic member provided with the preliminary compression is assembled,
Moreover, since the gear member is press-fitted and fixed to the outer member, the dimensional accuracy of the gear is high.

［実施例］ 以下実施例により本考案を具体的に説明する。[Embodiment] The present invention will be described in detail with reference to an embodiment.

（実施例１） 第１図はゴム入り歯車の平面図を、第２図は第１図に示
すＡ−Ａ面の断面図を、第３図は第２図の歯車のギヤ部
圧入前のギヤ部がない状態の断面図を示す。(Embodiment 1) FIG. 1 is a plan view of a rubber-containing gear, FIG. 2 is a cross-sectional view taken along the line AA shown in FIG. 1, and FIG. A sectional view of a state without a gear part is shown.

このゴム入り歯車は、第１図にその平面図を示すよう
に、軸芯部３を有するインナー部材４と、弾性部材７
と、アウター部材６およびギヤ部１の各部で構成されて
いる。軸芯部３は、円筒状で中心に芯棒が挿入される中
空部９をもち上部はインナー部材４より突出し、芯棒と
の接触面積を増し歯車を把持固定する。またこの軸芯部
３の一方の側面はインナー部材４の一方の側面と同一平
面となるようにに固定される。輪状のインナー部材４
と、該インナー部材４の外側部分を構成するアウター部
材６およびその両者の間に形成される空隙５に圧入され
たゴム状弾性部材７とが一体化された組付け品として形
成されている。このインナー部材４の中央孔に軸芯部３
が圧入固定される。アウター部材６の外周面８には輪状
のギヤ部１が挿着される。ギヤ部１はその外周縁に歯部
１２が形成されている。This rubber-filled gear has an inner member 4 having a shaft core portion 3 and an elastic member 7 as shown in the plan view of FIG.
And each part of the outer member 6 and the gear part 1. The shaft core 3 has a hollow portion 9 into which a core rod is inserted in the center and has an upper portion protruding from the inner member 4, increasing the contact area with the core rod and gripping and fixing the gear. Further, one side surface of the shaft core portion 3 is fixed so as to be flush with one side surface of the inner member 4. Ring-shaped inner member 4
The outer member 6 forming the outer portion of the inner member 4 and the rubber-like elastic member 7 press-fitted into the space 5 formed between the outer member 6 and the outer member 6 are integrally formed as an assembled product. The shaft core 3 is provided in the central hole of the inner member 4.
Is press-fitted and fixed. The ring-shaped gear portion 1 is inserted and attached to the outer peripheral surface 8 of the outer member 6. The gear portion 1 has a tooth portion 12 formed on the outer peripheral edge thereof.

第３図に示す断面図は、軸芯部３とインナー部材４、弾
性部材７およびアウター部材６との接合状態を示すもの
で、両者の一方の側面は同一平面にあり、他方の側面は
軸芯部３が突出している。アウター部材６の外周面８は
弾性部材７の圧入による歯部１２の芯ずれを防ぐため、
弾性部材７の圧入後に芯出し加工がなされる。この芯出
し加工されたアウター部材６の外周面８にギヤ部１が挿
着される。ギヤ部１は輪状で外周面に所定の歯部１２が
形成される。このギヤ部は底面がアウター部材６よりや
や下方に出ているが、上部はアウター部材６より下方に
固定される。The cross-sectional view shown in FIG. 3 shows a state in which the shaft core portion 3 and the inner member 4, the elastic member 7, and the outer member 6 are joined, one side surface of which is on the same plane and the other side surface of which is the shaft. The core 3 is protruding. The outer peripheral surface 8 of the outer member 6 prevents the core portion of the tooth portion 12 from being misaligned due to the press-fitting of the elastic member 7.
After press-fitting the elastic member 7, centering processing is performed. The gear portion 1 is inserted into the outer peripheral surface 8 of the centered outer member 6. The gear portion 1 has a ring shape and a predetermined tooth portion 12 is formed on the outer peripheral surface thereof. The bottom surface of this gear portion is slightly below the outer member 6, but the upper portion is fixed below the outer member 6.

このゴム入り歯車の組付けは、まず外周面が波形形状に
加工された輪状のインナー部材４を内周面が波形形状に
加工されたアウター部材６の内側に同軸に配置し空隙５
を形成する。その空隙５にあらかじめ空隙５より大きい
相似形に加硫された弾性部材７を圧入する。その後この
組付け品の内周面に円筒状の軸芯部３を圧入する。軸芯
部３とインナー部材４との回り止めを防止するために接
合面の径方向対称の位置に２箇所設けられている位置決
め用のネジ部１０をネジで固定する。このようにして得
られた組付け品の断面図を第３図に示す。そしてこの軸
芯部３の中空部９に加工用金具を挿入し、アウター部材
６の外周面８を研削して芯出し加工をおこなう。芯出し
加工した後アウター部材６の外周面に輪状のギヤ部１を
圧入固定して第２図の断面図に示すゴム入り歯車を作製
する。To assemble this rubber-containing gear, first, the ring-shaped inner member 4 whose outer peripheral surface is processed into a corrugated shape is coaxially arranged inside the outer member 6 whose inner peripheral surface is processed into a corrugated shape, and the gap 5 is formed.
To form. The elastic member 7 which has been vulcanized in a similar shape to the void 5 in advance is press-fitted into the void 5. After that, the cylindrical shaft core portion 3 is press-fitted into the inner peripheral surface of this assembled product. In order to prevent the shaft core portion 3 and the inner member 4 from being prevented from rotating, the positioning screw portions 10 provided at two positions symmetrical to each other in the radial direction of the joint surface are fixed with screws. A sectional view of the assembly thus obtained is shown in FIG. Then, a processing metal fitting is inserted into the hollow portion 9 of the shaft core portion 3, and the outer peripheral surface 8 of the outer member 6 is ground to perform centering processing. After the centering process, the ring-shaped gear portion 1 is press-fitted and fixed to the outer peripheral surface of the outer member 6 to manufacture the rubber-loaded gear shown in the sectional view of FIG.

得られた歯車は、第２図の断面図に示す様にインナー部
材１とアウター部材３との間が異形形状の弾性部材７で
分離されている。この弾性部材７は予備圧縮されており
歯部１２よりの振動などを吸収して減衰させる。また軸
芯部３で回転時に生じる振動もこの弾性部材７の存在で
減衰させることができる。したがって低振動、低騒音の
歯車となる。In the obtained gear, the inner member 1 and the outer member 3 are separated by a deformed elastic member 7 as shown in the sectional view of FIG. The elastic member 7 is pre-compressed and absorbs and damps vibrations from the teeth 12. Further, the vibration generated when the shaft core portion 3 is rotated can be damped by the presence of the elastic member 7. Therefore, the gear has low vibration and low noise.

この圧縮された弾性部材７を有するゴム入り歯車は、歯
部１２より軸側へ力を入力した場合の伝達関数を測定す
ると弾性部材の無い場合にくらべて約４０ｄｂ（デシベ
ル）程度の低減効果が認められた。The rubber-containing gear having the compressed elastic member 7 has a reduction effect of about 40 db (decibels) as compared with the case without the elastic member when the transfer function when the force is input from the tooth portion 12 to the shaft side is measured. Admitted.

（実施例２） このゴム入り歯車は、第４図に示すの歯車の断面図およ
び第５図に示す歯部組付け前の断面図に示すように弾性
部材７として円筒状のゴムをもちいたものである。(Embodiment 2) This rubber-containing gear uses a cylindrical rubber as the elastic member 7 as shown in the cross-sectional view of the gear shown in FIG. 4 and the cross-sectional view before assembly of the teeth shown in FIG. It is a thing.

このゴム入り歯車は、第４図に示すように軸芯部１５を
有するインナー部材１８と、弾性部材２０と、アウター
部材１９およびギヤ部１７とから構成されている。この
軸芯部１５は軸孔をもち一端側がフランジ状に広がった
筒状である。この軸芯部１５のフランジ状部がインナー
部材１８の内周面の上端部でインナー部材１８に把持固
定されている。輪状のインナー部材１８と該インナー部
材１８の外側部を構成するアウター部材１９と両者の間
に予備圧縮された弾性部材２０とが一体となった組付け
品として形成されている。アウター部材１９の外周面に
は輪状のギヤ部１７が挿着される。ギヤ部１７はその外
周面に歯部１２が形成されている。第５図に示す断面図
は、軸芯部１５と一体化したインナー部材１８と、弾性
部材２０およびアウター部材１９との接合状態を示すも
ので軸芯部１５のフランジ部の上端面とインナー部材１
８の上端面がほぼ同一面にあり軸芯部１５は突出してい
る。As shown in FIG. 4, this rubber-containing gear is composed of an inner member 18 having a shaft core portion 15, an elastic member 20, an outer member 19 and a gear portion 17. The shaft core portion 15 has a shaft hole and has a cylindrical shape in which one end side is widened like a flange. The flange portion of the shaft core portion 15 is gripped and fixed to the inner member 18 at the upper end portion of the inner peripheral surface of the inner member 18. A ring-shaped inner member 18, an outer member 19 forming an outer portion of the inner member 18, and a pre-compressed elastic member 20 therebetween are integrally formed as an assembled product. A ring-shaped gear portion 17 is inserted and attached to the outer peripheral surface of the outer member 19. The tooth portion 12 is formed on the outer peripheral surface of the gear portion 17. The sectional view shown in FIG. 5 shows a joint state of the inner member 18 integrated with the shaft core portion 15, the elastic member 20 and the outer member 19, and shows the upper end surface of the flange portion of the shaft core portion 15 and the inner member. 1
The upper end surface of 8 is substantially on the same plane, and the shaft core portion 15 projects.

実施例１の場合と同様にアウター部材１９の外周面は芯
出し加工されている。この芯出し加工された外周面にギ
ヤ部１５が挿着されて形成されている。ギヤ部１５はア
ウター部材１９の外周面内に固定される。As in the case of the first embodiment, the outer peripheral surface of the outer member 19 is centered. The gear portion 15 is inserted and formed on the centered outer peripheral surface. The gear portion 15 is fixed inside the outer peripheral surface of the outer member 19.

このゴム入り歯車の組付けは、まずブッシュ形状のイン
ナー部材１８およびアウター部材１９を金型に組み込
み、この一対のインナー部材１８とアウター部材１９と
の間の空隙にゴムを注入し加硫した後アウター部材１９
を絞り加工して弾性部材２０を径方向に予備圧縮してイ
ンナー部材１８と弾性部材２０およびアウター部材１９
を一体化して組付け品とする。次いでインナー部材１８
の内周面に円筒状の軸芯部１５を圧入する。得られた組
付け品を第５図に示す。この軸芯部１５の中空部を加工
用の金具を挿入して固定しアウター部材１９の外周面を
研削加工して芯出しをおこなう。次いで芯出し加工した
アウター部材１９の外周面にギヤ部１７を圧入固定して
実施例１と同様にゴム入り歯車を一体化して形成した。To assemble this rubber-containing gear, first, the bush-shaped inner member 18 and outer member 19 are assembled in a mold, and rubber is injected into the space between the pair of inner member 18 and outer member 19 for vulcanization. Outer member 19
And the elastic member 20 is pre-compressed in the radial direction to reduce the inner member 18, the elastic member 20, and the outer member 19.
Are integrated into an assembled product. Then the inner member 18
The cylindrical shaft core portion 15 is press-fitted into the inner peripheral surface of the. The resulting assembled product is shown in FIG. The hollow portion of the shaft core portion 15 is fixed by inserting a metal fitting for machining, and the outer peripheral surface of the outer member 19 is ground to perform centering. Then, the gear portion 17 was press-fitted and fixed to the outer peripheral surface of the centered outer member 19, and the rubber-containing gear was integrally formed in the same manner as in Example 1.

得られた歯車はインナー部材１８とアウター部材１９と
の間に弾性部材２０が予備圧縮されており、歯部１２よ
りの振動などを吸収して減衰させる。また軸芯部１５で
回転時に生じる振動もこの弾性部材２０の存在で減衰さ
せることができるため低振動、低騒音の歯車が得られ
る。In the obtained gear, the elastic member 20 is pre-compressed between the inner member 18 and the outer member 19, and absorbs vibrations from the tooth portion 12 and attenuates them. Further, since the vibration generated when the shaft core portion 15 is rotated can be attenuated by the presence of the elastic member 20, a gear having low vibration and low noise can be obtained.

［効果］ 本考案のゴム入り歯車は、軸芯部と歯部との間に弾性部
材が予備圧縮されて支持されているために全金属のもの
に比べて振動や音などの減衰効果を有し、駆動歯車、被
駆動歯車として使用した場合の低振動、低騒音性の特長
を有する。また弾性部材の形状を波型の異形形状とする
ことにより、弾性部材に加わる力を剪断方向から圧縮方
向にすることができ弾性部材の耐久性を大幅に向上させ
ることもできる。また予備圧縮された弾性部材を組みつ
けた後に、アウター部材の外周面を芯出し加工している
ため、ギヤ部を挿着するため精度の高い歯車となってい
る。[Effects] The rubber-filled gear of the present invention has a damping effect on vibration and sound as compared with an all-metal gear because the elastic member is pre-compressed and supported between the shaft core and the teeth. However, it has the characteristics of low vibration and low noise when used as a driving gear and a driven gear. Further, by making the shape of the elastic member a corrugated irregular shape, the force applied to the elastic member can be changed from the shear direction to the compression direction, and the durability of the elastic member can be greatly improved. In addition, since the outer peripheral surface of the outer member is centered after the pre-compressed elastic member is assembled, the gear portion is inserted and attached, resulting in a highly accurate gear.

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

第１図は本考案のゴム入り歯車の一実施例の平面図であ
り、第２図は第１図の歯車のＡ−Ｂ面の断面図であり、
第３図は第２図の歯車のギヤ部の圧入前の断面図であ
り、第４図および第５図は本考案の別の実施例関するも
ので第４図は一体化した歯車の断面図、第５図はギヤ部
圧入前の断面図である。 ４、１８……インナー部材、７、２０……弾性部材 ６、１９……アウター部材、１、１７……ギヤ部 ３、１５……軸芯部、１０……ネジ部 １２……歯部1 is a plan view of an embodiment of a rubber-filled gear of the present invention, and FIG. 2 is a cross-sectional view of the gear of FIG. 1 taken along the line AB.
FIG. 3 is a sectional view of the gear portion of FIG. 2 before press fitting, and FIGS. 4 and 5 relate to another embodiment of the present invention. FIG. 4 is a sectional view of an integrated gear. 5 is a cross-sectional view before press fitting the gear portion. 4, 18 ... Inner member, 7, 20 ... Elastic member 6, 19 ... Outer member, 1, 17 ... Gear part 3, 15 ... Shaft core part, 10 ... Screw part 12 ... Tooth part

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 【請求項１】軸芯部を有する輪状のインナー部材と、 該インナー部材の外周面に設けられた予備圧縮されたゴ
ム状弾性部材と、 該弾性部材の外周面側に位置し、該インナー部材とで該
弾性部材を径方向に圧縮するとともに、外周面が該弾性
部材を該インナー部材とで圧縮している状態で芯出し加
工された輪状のアウター部材と、 該アウター部材の芯出し加工された外周面に挿着され、
外周縁部に歯部を有する輪状のギヤ部とからなることを
特徴とするゴム入り歯車。1. A ring-shaped inner member having an axial core portion, a pre-compressed rubber-like elastic member provided on the outer peripheral surface of the inner member, and an inner member located on the outer peripheral surface side of the elastic member. The outer member is radially centered, and the outer peripheral surface is centered while the elastic member is being compressed by the inner member, and the outer member is centered. Is attached to the outer peripheral surface,
A rubber-filled gear, comprising a ring-shaped gear portion having teeth on the outer peripheral edge portion.