JPH04271261A - Brake drum of eddy current type speed reducer - Google Patents
Brake drum of eddy current type speed reducerInfo
- Publication number
- JPH04271261A JPH04271261A JP5401291A JP5401291A JPH04271261A JP H04271261 A JPH04271261 A JP H04271261A JP 5401291 A JP5401291 A JP 5401291A JP 5401291 A JP5401291 A JP 5401291A JP H04271261 A JPH04271261 A JP H04271261A
- Authority
- JP
- Japan
- Prior art keywords
- brake drum
- cylindrical body
- fins
- eddy current
- ventilation passage
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000003638 chemical reducing agent Substances 0.000 title description 2
- 238000009423 ventilation Methods 0.000 claims abstract description 58
- 230000002093 peripheral effect Effects 0.000 claims description 15
- 238000001816 cooling Methods 0.000 abstract description 10
- 230000000694 effects Effects 0.000 abstract description 7
- 230000005294 ferromagnetic effect Effects 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 238000005219 brazing Methods 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 230000005291 magnetic effect Effects 0.000 description 1
- 239000000696 magnetic material Substances 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 239000013585 weight reducing agent Substances 0.000 description 1
Landscapes
- Motor Or Generator Frames (AREA)
- Motor Or Generator Cooling System (AREA)
- Dynamo-Electric Clutches, Dynamo-Electric Brakes (AREA)
Abstract
Description
【０００１】0001
【産業上の利用分野】本発明は大型車両に搭載されて摩
擦ブレーキを補助する渦電流式減速装置、特に制動時の
発熱に対する冷却性能を高めた渦電流式減速装置の制動
ドラムに関するものである。[Field of Industrial Application] The present invention relates to an eddy current reduction gear that is mounted on a large vehicle to assist friction braking, and more particularly to a brake drum of an eddy current reduction gear that has improved cooling performance against heat generated during braking. .
【０００２】0002
【従来の技術】特開平１−２３４０４３号に開示される
渦電流式減速装置では、制動ドラムの内部へ突出する磁
石案内枠に、磁石支持環が軸方向摺動可能に支持され、
制動ドラムの内周壁に対向する多数の永久磁石が、周方
向に極性が交互に異なるよう磁石支持環に結合される。
車両の高速走行で連続制動を行うと、制動ドラムが高温
になるので、制動ドラムの強度が低下し、制動ドラムが
熱変形を起したり、亀裂を生じる恐れがある。2. Description of the Related Art In an eddy current reduction gear disclosed in Japanese Patent Application Laid-Open No. 1-234043, a magnet support ring is supported by a magnet guide frame that projects into the inside of a brake drum so as to be slidable in the axial direction.
A large number of permanent magnets facing the inner circumferential wall of the brake drum are coupled to the magnet support ring so that their polarities alternate in the circumferential direction. When a vehicle is continuously braked while running at high speed, the brake drum becomes hot, which reduces the strength of the brake drum and may cause thermal deformation or cracking of the brake drum.
【０００３】制動ドラムを冷却するために、従来の制動
ドラムは外周壁に径外方へ突出するフインを周方向等間
隔に配設し、フインの長手方向の向きを制動ドラムの中
心軸線に対し傾けてあるので、制動ドラムの回転に伴つ
て空気がフイン相互間の空部を制動ドラムの一端側から
他端側へ流れる。しかし、フイン相互間の空部は制動ド
ラムの径外方へ開放されているので、制動ドラムの回転
に伴いフイン相互間の空気が遠心力を受けて径外方へ流
出する傾向があり、制動ドラムの外周壁とフインから熱
を吸収すべき、フイン相互間の空部の空気密度が粗にな
り、冷却効果が減殺される。In order to cool the brake drum, conventional brake drums have fins protruding radially outward on the outer peripheral wall arranged at equal intervals in the circumferential direction, and the longitudinal direction of the fins is aligned with respect to the central axis of the brake drum. Since the brake drum is tilted, air flows through the space between the fins from one end of the brake drum to the other end as the brake drum rotates. However, since the space between the fins is open radially outward of the brake drum, as the brake drum rotates, the air between the fins tends to flow outward radially due to centrifugal force. The air density in the space between the fins, which should absorb heat from the outer peripheral wall of the drum and the fins, becomes coarse, reducing the cooling effect.
【０００４】0004
【発明が解決しようとする問題点】本考案の目的は上述
の問題に鑑み、制動ドラムのフイン相互間の空気が遠心
力により流出しないように、フイン相互間に閉鎖された
通風路を設け、空気を通風路へ積極的に導入して冷却効
果を高める、渦電流式減速装置の制動ドラムを提供する
ことにある。[Problems to be Solved by the Invention] In view of the above-mentioned problems, an object of the present invention is to provide a closed ventilation passage between the fins of a brake drum so that the air between the fins does not flow out due to centrifugal force. An object of the present invention is to provide a braking drum for an eddy current speed reduction device that actively introduces air into a ventilation path to enhance the cooling effect.
【０００５】[0005]
【問題点を解決するための手段】上記目的を達成するた
めに、本発明の構成は外周壁に周方向等間隔に多数のフ
インを設けた制動ドラムに、円筒体を外嵌して軸方向の
通風路を形成し、通風路に気流を生じさせる通風手段を
備えたものである。[Means for Solving the Problems] In order to achieve the above object, the present invention has a structure in which a cylindrical body is fitted onto a brake drum in which a large number of fins are provided on the outer circumferential wall at equal intervals in the circumferential direction. The ventilator is provided with a ventilation means for forming an airflow path and generating an airflow in the ventilation path.
【０００６】[0006]
【作用】本発明によれば、制動ドラムの外周壁に周方向
等間隔に多数の閉断面の通風路を設け、空気を通風路の
一端から他端へ貫流させ、通風路の内壁を通じて制動ド
ラムを冷却する。通風路は閉断面をなすから、通風路の
空気が遠心力を受けて径外方へ流出することはなく、し
たがつて空気密度の低下が抑えられ、冷却効果が向上さ
れる。[Operation] According to the present invention, a large number of closed cross-section ventilation passages are provided on the outer circumferential wall of the brake drum at equal intervals in the circumferential direction, and air flows through the ventilation passage from one end to the other end of the brake drum through the inner wall of the ventilation passage. to cool down. Since the ventilation passage has a closed cross section, the air in the ventilation passage does not flow outward in the radial direction due to centrifugal force, thereby suppressing a decrease in air density and improving the cooling effect.
【０００７】[0007]
【発明の実施例】図１０は本発明に係る制動ドラムを備
えた車両用渦電流式減速装置の側面断面図である。変速
機の歯車箱２の端壁に軸受３により支持されかつ端壁か
ら突出する出力回転軸４に、取付フランジ５がスプライ
ン嵌合されかつ外れないようにナツト６により締結され
る。取付フランジ５に駐車ブレーキの制動ドラム７の端
壁と、減速装置の制動ドラム１３のボス部９と一体のフ
ランジ部９ａとが重ね合され、複数のボルト１０とナツ
ト１０ａにより締結される。DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 10 is a side cross-sectional view of an eddy current speed reduction device for a vehicle equipped with a brake drum according to the present invention. A mounting flange 5 is spline-fitted to an output rotating shaft 4 supported by a bearing 3 on an end wall of a gear box 2 of the transmission and protruding from the end wall, and fastened with a nut 6 so as not to come off. An end wall of a brake drum 7 of a parking brake and a flange portion 9a integral with a boss portion 9 of a brake drum 13 of a speed reducer are superimposed on the mounting flange 5, and fastened with a plurality of bolts 10 and nuts 10a.
【０００８】制動ドラム１３はボス部９から放射方向に
延びる多数のスポーク１２に支持される。このため、ス
ポーク１２の先端は制動ドラム１３の右端部に溶接によ
り結合される。制動ドラム１３の外周壁に周方向等間隔
に、多数のフイン１３ａが備えられる。The brake drum 13 is supported by a number of spokes 12 extending radially from the boss portion 9 . Therefore, the tips of the spokes 12 are joined to the right end of the brake drum 13 by welding. A large number of fins 13a are provided on the outer peripheral wall of the brake drum 13 at equal intervals in the circumferential direction.
【０００９】電気導体からなる制動ドラム１３の内側に
、断面箱形の内空部を有する筒形の磁石案内枠１８が配
設される。磁石案内枠１８は歯車箱２の突壁２ａに外嵌
固定した補強リブ３１ａを有する枠板３１にボルト３２
，３３により固定される。A cylindrical magnet guide frame 18 having an inner cavity with a box-shaped cross section is disposed inside the brake drum 13 made of an electrical conductor. The magnet guide frame 18 has bolts 32 attached to a frame plate 31 having reinforcing ribs 31a externally fitted and fixed to the projecting wall 2a of the gear box 2.
, 33.
【００１０】磁石案内枠１８は外筒と内筒の両端に環状
の端壁板を結合して構成してもよいが、図示の磁石案内
枠１８は普通の鉄などの材料からなる左半部の断面コ字
形をなす筒形の枠部分１８ａと、アルミニウムなどの非
磁性体からなる右半部の断面逆Ｌ字形をなす筒形の枠部
分１８ｂとを、多数のボルト１４により結合して構成さ
れる。The magnet guide frame 18 may be constructed by connecting annular end wall plates to both ends of the outer cylinder and the inner cylinder, but the illustrated magnet guide frame 18 has a left half made of a material such as ordinary iron. A cylindrical frame portion 18a having a U-shaped cross section and a cylindrical frame portion 18b having an inverted L-shaped cross section on the right half made of a non-magnetic material such as aluminum are connected by a large number of bolts 14. be done.
【００１１】制動ドラム１３の内周壁と対向する磁石案
内枠１８の外筒部すなわち枠部分１８ｂの周壁に、周方
向等間隔に多数の開口が設けられ、これらの開口に強磁
性板（ポールピース）２１が嵌合固定される。実際には
、枠部分１８ｂをアルミニウムから鋳造する際に、強磁
性板２１を鋳ぐるんで構成する。枠板３１に周方向等間
隔に複数のアクチユエータ（図示せず）が支持される。
アクチユエータはシリンダに嵌合したピストンから磁石
案内枠１８の内空部へ突出するロツド１７の端部に磁石
支持環１９を結合される。磁石支持環１９は磁石案内枠
１８に軸方向移動可能に支持される。磁石支持環１９の
外周壁に、各強磁性板２１と対向する永久磁石２０が、
周方向に極性を交互に異にして結合される。A large number of openings are provided at equal intervals in the circumferential direction on the peripheral wall of the outer cylindrical portion, that is, the frame portion 18b, of the magnet guide frame 18, which faces the inner peripheral wall of the brake drum 13. ) 21 are fitted and fixed. Actually, when the frame portion 18b is cast from aluminum, the ferromagnetic plate 21 is cast inside the frame portion 18b. A plurality of actuators (not shown) are supported on the frame plate 31 at equal intervals in the circumferential direction. In the actuator, a magnet support ring 19 is coupled to the end of a rod 17 that projects from a piston fitted into a cylinder into the inner cavity of a magnet guide frame 18. The magnet support ring 19 is supported by the magnet guide frame 18 so as to be movable in the axial direction. A permanent magnet 20 facing each ferromagnetic plate 21 is provided on the outer peripheral wall of the magnet support ring 19.
They are connected with alternating polarities in the circumferential direction.
【００１２】制動作用時、磁石支持環１９は図示してな
いアクチユエータによりロツド１７を介して制動ドラム
１３の内部へ突出される。回転する制動ドラム１３が永
久磁石２０から強磁性板２１を透過して制動ドラム１３
の内周壁へ及ぶ磁界を横切る時、制動ドラム１３に渦電
流が発生し、制動ドラム１３が制動トルクを受ける。制
動ドラム１３は渦電流により発熱し、直接またはフイン
１３ａで空気により冷却される。During a braking operation, the magnet support ring 19 is projected into the interior of the brake drum 13 via the rod 17 by an actuator (not shown). The rotating brake drum 13 passes through the ferromagnetic plate 21 from the permanent magnet 20 to the brake drum 13.
When crossing the magnetic field extending to the inner circumferential wall of the brake drum 13, an eddy current is generated in the brake drum 13, and the brake drum 13 is subjected to a braking torque. The brake drum 13 generates heat due to eddy currents and is cooled by air directly or by means of fins 13a.
【００１３】本発明は制動ドラム１３の外周壁の空気密
度の低下を抑え、空気の熱吸収容量を維持し、制動ドラ
ム１３の冷却性能を高めるために、周方向等間隔に並ぶ
フイン１３ａに円筒体４１を外嵌結合して、フイン１３
ａの相互間に通風路４２を形成するものである。[0013] In the present invention, in order to suppress a decrease in air density on the outer peripheral wall of the brake drum 13, maintain the heat absorption capacity of the air, and improve the cooling performance of the brake drum 13, cylindrical fins 13a are arranged at equal intervals in the circumferential direction. The body 41 is fitted and connected to the fin 13.
A ventilation path 42 is formed between the two.
【００１４】図１〜３に示す実施例では、制動ドラム１
３と円筒体４１が鋳造などにより一体に構成され、制動
ドラム１３と円筒体４１との間に周方向等間隔に並ぶフ
イン１３ａにより通風路４２が形成される。図２に示す
ように、空気をして通風路４２を貫流させる通風手段と
して、各フイン１３ａの向きは制動ドラム１３の中心軸
線に対し傾けられる。図示の制動ドラム１３は右端に端
壁１２ａを備えているが、図１０に示すように、スポー
ク１２で回転軸４へ支持するのが好ましい。In the embodiment shown in FIGS. 1 to 3, the brake drum 1
3 and a cylindrical body 41 are integrally formed by casting or the like, and a ventilation passage 42 is formed between the brake drum 13 and the cylindrical body 41 by fins 13a arranged at equal intervals in the circumferential direction. As shown in FIG. 2, each fin 13a serves as a ventilation means for causing air to flow through the ventilation passage 42, and the orientation of each fin 13a is inclined with respect to the central axis of the brake drum 13. Although the illustrated brake drum 13 has an end wall 12a at the right end, it is preferable to support the rotary shaft 4 by spokes 12, as shown in FIG.
【００１５】制動ドラム１３が矢印ｙ方向へ回転する時
、空気が左端から通風路４２へ導入され、右端から排出
される。通風路４２は円筒体４１により閉鎖されている
から、通風路４２の空気が遠心力を受けても径外方へ流
出せず、したがつて、通風路４２の空気密度の低下が抑
えられ、通風路４２を貫流する空気により、通風路４２
を通じて制動ドラム１３が効率的に冷却される。When the brake drum 13 rotates in the direction of arrow y, air is introduced into the ventilation passage 42 from the left end and is discharged from the right end. Since the ventilation passage 42 is closed by the cylindrical body 41, even if the air in the ventilation passage 42 is subjected to centrifugal force, it does not flow out radially outward, and therefore, a decrease in air density in the ventilation passage 42 is suppressed. The air flowing through the ventilation passage 42 causes the ventilation passage 42 to
Through this, the brake drum 13 is efficiently cooled.
【００１６】図４に示す実施例では、通風路４２は制動
ドラム１３の中心軸線と平行に設けられ、空気をして通
風路４２を貫流させる通風手段として、各通風路４２の
軸方向中心部分に開口４４を設け、開口４４の外周側に
制動ドラム１３の回転方向ｙへ斜めに突出する風寄せ板
４３を設ける。通風路４２の空気の流れを円滑にするた
めに、通風路４２を外周側から見てＶ形に屈曲させるこ
とが好ましい。In the embodiment shown in FIG. 4, the ventilation passages 42 are provided parallel to the central axis of the brake drum 13, and the axial center portion of each ventilation passage 42 serves as a ventilation means for causing air to flow through the ventilation passages 42. An opening 44 is provided in the opening 44, and a wind baffle plate 43 is provided on the outer peripheral side of the opening 44 to project obliquely in the rotational direction y of the brake drum 13. In order to smooth the flow of air in the ventilation passage 42, it is preferable that the ventilation passage 42 be bent into a V shape when viewed from the outer circumferential side.
【００１７】制動ドラム１３が矢印ｙ方向へ回転する時
、円筒体４１の外周側の空気が風寄せ板４３により開口
４４を経て通風路４２の軸方向中心部へ導入され、制動
ドラム１３の外周壁とフイン１３ａと円筒体４１の内周
壁とを冷却しながら通風路４２の両端へ流出する。この
実施例による構造は、制動ドラム１３の回転停止後も、
通風路４２の熱気が開口４４から外方へ排出される点で
、放熱効果が優れる。When the brake drum 13 rotates in the direction of the arrow y, air on the outer circumferential side of the cylindrical body 41 is introduced into the axial center of the ventilation passage 42 by the baffle plate 43 through the opening 44, and the outer circumference of the brake drum 13 is The air flows out to both ends of the ventilation passage 42 while cooling the wall, the fins 13a, and the inner circumferential wall of the cylindrical body 41. With the structure of this embodiment, even after the brake drum 13 stops rotating,
The heat dissipation effect is excellent in that the hot air in the ventilation passage 42 is discharged outward from the opening 44.
【００１８】図５，６に示す実施例では、空気をして通
風路４２を貫流させる通風手段として、制動ドラム１３
の一端側に風車５１が備えられる。すなわち、制動ドラ
ム１３の外周壁と円筒体４１との間に、フイン１３ａに
より仕切られた通風路４２を形成し、円筒体４１の右端
部に一体に形成したフランジ４１ｂに、多数の羽根１３
ｃを設ける。羽根１３ｃはフイン１３ａと一体をなし、
かつ制動ドラム１３の回転方向ｙと反対方向へ傾けられ
る。好ましくは、羽根１３ｃは軸心から径外方へ至るに
したがい、制動ドラム１３の回転方向ｙと反対方向（図
６において左方）へ湾曲する。図５に示すように、円筒
体４１の左端部に環状の端壁４１ａを設け、端壁４１ａ
と制動ドラム１３の左端壁との間に、フイン１３ａと一
体をなす羽根１３ｂにより通風路４２ａを形成する。In the embodiment shown in FIGS. 5 and 6, the brake drum 13 is used as a ventilation means for causing air to flow through the ventilation passage 42.
A windmill 51 is provided at one end of the windmill. That is, a ventilation passage 42 partitioned by fins 13a is formed between the outer peripheral wall of the brake drum 13 and the cylindrical body 41, and a large number of blades 13 are formed on a flange 41b integrally formed at the right end of the cylindrical body 41.
Provide c. The blade 13c is integrated with the fin 13a,
Moreover, it is tilted in a direction opposite to the rotational direction y of the brake drum 13. Preferably, the blade 13c curves in a direction opposite to the rotational direction y of the brake drum 13 (to the left in FIG. 6) as it extends radially outward from the axis. As shown in FIG. 5, an annular end wall 41a is provided at the left end of the cylindrical body 41.
A ventilation passage 42a is formed between the fin 13a and the left end wall of the brake drum 13 by the blade 13b that is integrated with the fin 13a.
【００１９】この実施例では、制動ドラム１３の内周壁
の熱気が矢印で示すように、通風路４２ａを経て通風路
４２へ吸引され、制動ドラム１３の外周壁とフイン１３
ａと円筒体４１の内周壁とを冷却しながら、風車５１の
羽根１３ｃの相互間の空部を経て径外方へ排出される。In this embodiment, the hot air on the inner peripheral wall of the brake drum 13 is sucked into the ventilation passage 42 through the ventilation passage 42a as shown by the arrow, and the hot air on the inner peripheral wall of the brake drum 13 and the fin 13 are sucked into the ventilation passage 42 through the ventilation passage 42a.
The air is discharged radially outward through the space between the blades 13c of the wind turbine 51 while cooling the air and the inner circumferential wall of the cylindrical body 41.
【００２０】図７に示す実施例は、円筒体４７の内周壁
と制動ドラム１３の外周壁とに、薄板を波形に湾曲して
なるコルゲートフイン４８の山部４８ａと谷部４８ｂを
溶接し、円筒体側に通風路５３を、制動ドラム側に通風
路５２をそれぞれ形成したものである。コルゲートフイ
ン４８の山部４８ａの稜線は、図２に示すフイン１３ａ
の場合と同様に、制動ドラム１３の中心軸線に対し傾け
る。この実施例による制動ドラムは、制動ドラム１３の
外周壁と円筒体４７とコルゲートフイン４８とに予めろ
う材を被覆し、これらを組み合せたうえ加熱炉で溶着す
れば、組立加工が非常に簡単であり、コルゲートフイン
４８が制動ドラム１３と円筒体４７とに接合されるから
、円筒体４７とコルゲートフイン４８の板厚が薄くても
、剛性強度が高く、軽量化にも役立つ。In the embodiment shown in FIG. 7, peaks 48a and valleys 48b of a corrugated fin 48 made of a corrugated thin plate are welded to the inner peripheral wall of the cylindrical body 47 and the outer peripheral wall of the brake drum 13. A ventilation passage 53 is formed on the cylindrical body side, and a ventilation passage 52 is formed on the brake drum side. The ridgeline of the peak portion 48a of the corrugated fin 48 is the same as that of the fin 13a shown in FIG.
As in the case of , it is tilted with respect to the central axis of the brake drum 13. The brake drum according to this embodiment can be assembled very easily by coating the outer circumferential wall of the brake drum 13, the cylindrical body 47, and the corrugated fins 48 with a brazing material in advance, combining them, and welding them in a heating furnace. Since the corrugated fins 48 are joined to the brake drum 13 and the cylindrical body 47, even if the cylindrical body 47 and the corrugated fins 48 are thin, they have high rigidity and strength and are useful for weight reduction.
【００２１】図８に示す実施例は、円筒体４７の軸方向
中心部に、円筒体４７の外周側へ三角錐形の風寄せ板４
５を切り起こし、制動ドラム１３の回転方向ｙの前方に
開口４６を形成する。制動ドラム１３が回転する時、円
筒体４７の外周側の空気が開口４６から通風路５３の軸
方向中心部へ導入され、通風路５３の両端部へ流れなが
ら、円筒体４７とコルゲートフイン４８を冷却する。コ
ルゲートフイン４８の山部４８ａの稜線の向きは、制動
ドラム１３の中心軸線と平行にするかＶ形に屈曲させ、
またコルゲートフイン４８にルーバを設けて通風路５３
の空気の一部を通風路５２へ流入させることが好ましい
。In the embodiment shown in FIG. 8, a triangular pyramid-shaped wind baffle plate 4 is provided at the axial center of the cylindrical body 47 and toward the outer circumferential side of the cylindrical body 47.
5 is cut and raised to form an opening 46 at the front of the brake drum 13 in the rotational direction y. When the brake drum 13 rotates, air on the outer peripheral side of the cylindrical body 47 is introduced into the axial center of the ventilation passage 53 through the opening 46, and flows through the cylindrical body 47 and the corrugated fins 48 while flowing to both ends of the ventilation passage 53. Cooling. The direction of the ridgeline of the peak portion 48a of the corrugated fin 48 is made parallel to the central axis of the brake drum 13 or bent in a V shape.
In addition, a louver is provided in the corrugated fin 48 to provide ventilation passage 53.
It is preferable to allow a part of the air to flow into the ventilation passage 52.
【００２２】[0022]
【発明の効果】本発明は上述のように、外周壁に周方向
等間隔に多数のフインを設けた制動ドラムに、円筒体を
外嵌して軸方向の通風路を形成し、通風路に気流を生じ
させる通風手段を備えたから、制動ドラムの回転する時
、空気が通風路を貫流して制動ドラムを冷却する。通風
路は閉断面をなすから、空気が遠心力を受けて径外方へ
流出することはなく、したがつて空気密度の低下が抑え
られ、空気の熱吸収容量が大きく、冷却効果が向上され
る。Effects of the Invention As described above, the present invention includes a brake drum having a large number of fins arranged at equal intervals in the circumferential direction on the outer circumferential wall, and a cylindrical body fitted onto the outside to form an axial ventilation passage. Since the ventilation means for generating an air current is provided, when the brake drum rotates, air flows through the ventilation passage and cools the brake drum. Since the ventilation passage has a closed cross section, the air will not flow outward due to centrifugal force, which will prevent the decrease in air density, increase the heat absorption capacity of the air, and improve the cooling effect. Ru.
【図１】本発明の第１実施例に係る制動ドラムを示す側
面断面図である。FIG. 1 is a side sectional view showing a brake drum according to a first embodiment of the present invention.
【図２】同制動ドラムの一部を破断しかつ周方向に展開
して示す平面図である。FIG. 2 is a plan view showing the brake drum partially cut away and expanded in the circumferential direction.
【図３】同制動ドラムの一部を破断して示す正面図であ
る。FIG. 3 is a partially cutaway front view of the brake drum.
【図４】本発明の第２実施例に係る制動ドラムの正面断
面図である。FIG. 4 is a front sectional view of a brake drum according to a second embodiment of the present invention.
【図５】本発明の第３実施例に係る制動ドラムの側面断
面図である。FIG. 5 is a side sectional view of a brake drum according to a third embodiment of the present invention.
【図６】同制動ドラムの一部を破断して示す正面図であ
る。FIG. 6 is a partially cutaway front view of the brake drum.
【図７】本発明の第４実施例に係る制動ドラムの正面断
面図である。FIG. 7 is a front sectional view of a brake drum according to a fourth embodiment of the present invention.
【図８】本発明の第５実施例に係る制動ドラムの正面断
面図である。FIG. 8 is a front sectional view of a brake drum according to a fifth embodiment of the present invention.
【図９】同制動ドラムの一部を周方向に展開して示す平
面図である。FIG. 9 is a plan view showing a part of the brake drum expanded in the circumferential direction.
【図１０】本発明に係る制動ドラムを備えた渦電流式減
速装置の側面断面図である。FIG. 10 is a side sectional view of an eddy current speed reduction device equipped with a brake drum according to the present invention.
１３：制動ドラム １３ａ：フイン ４１，４７：
円筒体 ４２，５２，５３：通風路 ４３，４５：
風寄せ板 ４４，４６：開口 ４８：コルゲートフ
イン５１：風車13: Braking drum 13a: Fin 41, 47:
Cylindrical body 42, 52, 53: Ventilation passage 43, 45:
Wind board 44, 46: Opening 48: Corrugated fin 51: Windmill
Claims (5)
けた制動ドラムに、円筒体を外嵌して軸方向の通風路を
形成し、通風路に気流を生じさせる通風手段を備えたこ
とを特徴とする、渦電流式減速装置の制動ドラム。Claim 1: A brake drum having a plurality of fins provided on the outer peripheral wall at equal intervals in the circumferential direction, and a cylindrical body fitted onto the outside to form an axial ventilation passage, and a ventilation means for generating airflow in the ventilation passage. A braking drum for an eddy current speed reduction device.
軸線に対し傾けてなる、請求項１に記載の渦電流式減速
装置の制動ドラム。2. A brake drum for an eddy current reduction gear according to claim 1, wherein said ventilation means has fins inclined with respect to the center axis of the brake drum.
風路へ連通する開口を設け、開口に制動ドラムの回転方
向へ斜めに突出する風寄せ板を備えてなる、請求項１に
記載の渦電流式減速装置の制動ドラム。3. The ventilation means according to claim 1, wherein an opening communicating with each ventilation passage is provided at the axial center of the cylindrical body, and the opening is provided with a baffle plate projecting obliquely in the rotational direction of the brake drum. Braking drum of the described eddy current reduction device.
ランジの板面に、軸方向へ突出する多数の羽根を周方向
等間隔に備えてなる風車である、請求項１に記載の渦電
流式減速装置の制動ドラム。4. The ventilation means is a windmill comprising a flange formed at an end of a cylindrical body, and a plurality of blades protruding in the axial direction and provided at equal intervals in the circumferential direction on a plate surface of the flange. Braking drum of eddy current reduction device.
、円筒体の内周壁と制動ドラムの外周壁に、薄板を波形
に湾曲成形してなるコルゲートフインを結合したことを
特徴とする、渦電流式減速装置の制動ドラム。5. A cylindrical body is arranged concentrically on the outer circumferential side of the brake drum, and corrugated fins made of thin plates curved into corrugated shapes are connected to the inner circumferential wall of the cylindrical body and the outer circumferential wall of the brake drum. The braking drum of the eddy current reduction device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3054012A JP2616592B2 (en) | 1991-02-26 | 1991-02-26 | Brake drum of eddy current type reduction gear |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3054012A JP2616592B2 (en) | 1991-02-26 | 1991-02-26 | Brake drum of eddy current type reduction gear |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04271261A true JPH04271261A (en) | 1992-09-28 |
| JP2616592B2 JP2616592B2 (en) | 1997-06-04 |
Family
ID=12958679
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3054012A Expired - Lifetime JP2616592B2 (en) | 1991-02-26 | 1991-02-26 | Brake drum of eddy current type reduction gear |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2616592B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0533679U (en) * | 1991-10-07 | 1993-04-30 | 東京部品工業株式会社 | Eddy current type brake rotating body |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5671085U (en) * | 1979-11-06 | 1981-06-11 |
-
1991
- 1991-02-26 JP JP3054012A patent/JP2616592B2/en not_active Expired - Lifetime
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5671085U (en) * | 1979-11-06 | 1981-06-11 |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0533679U (en) * | 1991-10-07 | 1993-04-30 | 東京部品工業株式会社 | Eddy current type brake rotating body |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2616592B2 (en) | 1997-06-04 |
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