JPH11335041A - Hoisting machine for elevator - Google Patents
Hoisting machine for elevatorInfo
- Publication number
- JPH11335041A JPH11335041A JP14960698A JP14960698A JPH11335041A JP H11335041 A JPH11335041 A JP H11335041A JP 14960698 A JP14960698 A JP 14960698A JP 14960698 A JP14960698 A JP 14960698A JP H11335041 A JPH11335041 A JP H11335041A
- Authority
- JP
- Japan
- Prior art keywords
- sheave
- brake
- sliding surface
- bearings
- elevator
- 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
Landscapes
- Cage And Drive Apparatuses For Elevators (AREA)
- Braking Arrangements (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】この発明はエレベータ用巻上
機に係り、特にそのブレーキ装置の構造に関するもので
ある。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an elevator hoist, and more particularly, to a structure of a brake device thereof.
【０００２】[0002]
【従来の技術】図５は例えば特開平９−１４２７６号公
報に開示された従来のエレベータ用巻上機の構成を示す
部分断面した正面図、図６は従来のエレベータ用巻上機
の他の構成を示す部分断面した正面図である。図におい
て、１は基礎上に設置されたベッド、２，３はそれぞれ
と所定間隔を介しベッド１に取り付け固定された軸受、
４は軸受２，３に回転可能に取り付けられた軸、５は軸
受２，３間の軸４に嵌着され一体に取り付けられた綱
車、６は綱車５の一側で径方向外方へ延在して両面に摺
動面が形成されたブレーキディスク、７はブレーキディ
スク６の摺動面に対してその軸方向両側から接離可能に
構成されたブレーキパッドで、ブレーキディスク６の周
方向２カ所に設けられている。８はブレーキパッド７を
軸方向に駆動して制動の動作、解除を行うブレーキ駆動
装置としての油圧または電磁ブレーキ装置、９は軸４に
固定された回転子１０と軸受３に固定された固定子１１
でなる駆動モータとしての同期電動機、１２は綱車５と
ブレーキディスク６間に設けられた胴部である。2. Description of the Related Art FIG. 5 is a partially sectional front view showing the structure of a conventional elevator hoist disclosed in, for example, Japanese Patent Application Laid-Open No. 9-14276, and FIG. 6 is another conventional elevator hoist. It is the front view which carried out the partial cross section which showed a structure. In the drawing, 1 is a bed installed on a foundation, 2 and 3 are bearings attached to and fixed to the bed 1 at predetermined intervals from each other,
Reference numeral 4 denotes a shaft rotatably mounted on the bearings 2 and 3, reference numeral 5 denotes a sheave fitted to and integrally attached to the shaft 4 between the bearings 2 and 3, and reference numeral 6 denotes one side of the sheave 5 radially outward. The brake disk 7 has a sliding surface formed on both sides thereof and has a sliding surface formed on both sides. It is provided in two places in the direction. Reference numeral 8 denotes a hydraulic or electromagnetic brake device as a brake driving device for driving and releasing the brake by driving the brake pad 7 in the axial direction, and 9 denotes a rotor 10 fixed to the shaft 4 and a stator fixed to the bearing 3. 11
Reference numeral 12 denotes a body provided between the sheave 5 and the brake disk 6.
【０００３】次に動作について説明する。まず、ブレー
キ駆動装置８が制動解除され、駆動モータ９の運転で綱
車５が回転することにより綱車５に巻き付けられたロー
プ（図示せず）に吊持されたカゴ等の昇降体（図示せ
ず）が昇降する。次に、昇降体を停止する場合は、駆動
モータ９を停止させ同時にブレーキ駆動装置８を制動方
向に動作させて、ブレーキパッド７をブレーキディスク
６の摺動面に圧接させブレーキディスク６に制動をかけ
昇降体を所定位置に停止させる。この構成によればブレ
ーキディスク６と綱車が一体化されていることにより、
装置全体の軸方向長さを短くできる。Next, the operation will be described. First, the brake drive device 8 is released from braking, and the sheave 5 is rotated by the operation of the drive motor 9, and a hoisting body such as a basket suspended from a rope (not shown) wound around the sheave 5 (see FIG. (Not shown). Next, when stopping the lifting / lowering body, the drive motor 9 is stopped, and at the same time, the brake driving device 8 is operated in the braking direction, so that the brake pad 7 is pressed against the sliding surface of the brake disk 6 to brake the brake disk 6. The lifting body is stopped at a predetermined position. According to this configuration, since the brake disk 6 and the sheave are integrated,
The axial length of the entire device can be reduced.
【０００４】[0004]
【発明が解決しようとする課題】従来のエレベータ用巻
上機は上記のように構成されているので、ブレーキディ
スク６の綱車５側の摺動面にロープの潤滑油が付着し、
摺動面の摩擦係数が変化して所定のブレーキトルクを確
保できなくなるという問題点があった。この対応策とし
て図６に示すように綱車５とブレーキディスク６との間
に胴部１２を設け、潤滑油の付着を防止する構成とする
ことができるが、この構成では装置の全長が長くなり大
形化するという問題点があった。Since the conventional elevator hoist is constructed as described above, the lubricating oil of the rope adheres to the sliding surface of the brake disk 6 on the sheave 5 side,
There is a problem that the friction coefficient of the sliding surface changes and it becomes impossible to secure a predetermined brake torque. As a countermeasure, as shown in FIG. 6, a body 12 can be provided between the sheave 5 and the brake disk 6 to prevent the adhesion of lubricating oil. There was a problem that it became larger.
【０００５】この発明は上記のような問題点を解消する
ためになされたものであり、ブレーキ制動が有効に作用
し、かつ小形化が可能なエレベータ用巻上機を提供する
ことを目的とする。SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to provide an elevator hoisting machine in which brake braking works effectively and which can be downsized. .
【０００６】[0006]
【課題を解決するための手段】この発明の請求項１に係
わるエレベータ用巻上機は、ベッドに固定された一対の
軸受と、この両軸受間に回転可能に支持された綱車と、
この綱車の回転に制動をかけるブレーキ装置とを備えた
エレベータ用巻上機において、ブレーキ装置は、綱車の
両側部に形成された摺動面と、この摺動面に対しその軸
方向両側から接離可能に構成されたブレーキパッドとを
備えたものである。An elevator hoist according to claim 1 of the present invention comprises: a pair of bearings fixed to a bed; a sheave rotatably supported between the two bearings;
In an elevator hoist provided with a brake device for braking the rotation of the sheave, the brake device includes a sliding surface formed on both sides of the sheave, and two axial sides of the sliding surface. And a brake pad configured to be able to contact and separate from the brake pad.
【０００７】この発明の請求項２に係わるエレベータ用
巻上機は、請求項１において、摺動面は綱車と着脱可能
な部材で形成されているものである。According to a second aspect of the present invention, in the elevator hoist according to the first aspect, the sliding surface is formed of a member detachable from the sheave.
【０００８】[0008]
【発明の実施の形態】実施の形態１．以下、この発明の
実施の形態１を図について説明する。図１はこの発明の
実施の形態１によるエレベータ用巻上機の構成を示し、
（Ａ）はその正面図、（Ｂ）はその側面図、図２はブレ
ーキ駆動装置の構成を示す断面図である。図において、
１３は基礎上に設置されたベッド、１４，１５はそれぞ
れ所定間隔を介してベッド１３に取り付け固定され、後
述するブレーキ駆動装置の保持枠１４ａ、１５ａを備え
た軸受、１６は軸受１４，１５に回転可能に取り付けら
れた軸、１７は軸受１４，１５間の軸１６に一体に取り
付けられ軸方向両側部に摺動面１７ａ，１７ｂが形成さ
れた綱車、１８は摺動面１７ａ，１７ｂに対してその軸
方向両側から接離可能に構成されたブレーキパッドで、
摺動面の１７ａ、１７ｂそれぞれの周方向２カ所に設け
られている。DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiment 1 Hereinafter, a first embodiment of the present invention will be described with reference to the drawings. FIG. 1 shows a configuration of an elevator hoist according to Embodiment 1 of the present invention,
(A) is a front view, (B) is a side view, and FIG. 2 is a cross-sectional view showing a configuration of a brake driving device. In the figure,
Reference numeral 13 denotes a bed installed on a foundation, 14 and 15 are fixed to the bed 13 at predetermined intervals, respectively, and are provided with holding frames 14a and 15a of a brake driving device to be described later, and 16 is a bearing 14 and 15 A shaft 17 rotatably mounted, 17 is a sheave integrally mounted on the shaft 16 between the bearings 14 and 15 and has sliding surfaces 17a, 17b formed on both axial sides, and 18 is a sheave having sliding surfaces 17a, 17b. On the other hand, a brake pad configured to be able to contact and separate from both sides in the axial direction,
It is provided at two places in the circumferential direction of each of the sliding surfaces 17a and 17b.
【０００９】１９はブレーキパッド１８を軸方向に駆動
して制動の動作、解除を行うブレーキ駆動装置としての
ここでは油圧ブレーキ装置で、図２に示すように、保持
枠１４ａまたは１５ａに保持される駆動軸ケース２０
と、この駆動軸ケース２０内を軸方向に摺動可能に形成
され端部にブレーキパッド１８が固着された駆動軸２１
と、駆動軸ケース２０と駆動軸２１に介在し駆動軸２１
を摺動面１７ａまたは１７ｂ方向に付勢するばね２２
と、駆動軸ケース２０と駆動軸２１によって形成される
空間Ｑに油圧を加え駆動軸２１をばね２２の付勢と逆方
向に移動させる加圧装置２３とで構成する（従来と同
等）されている。２４は軸１６に直結され綱車１７を駆
動するモータである。Reference numeral 19 denotes a hydraulic brake device as a brake drive device for driving and releasing the brake by driving the brake pad 18 in the axial direction, and is held by the holding frame 14a or 15a as shown in FIG. Drive shaft case 20
And a drive shaft 21 formed to be slidable in the drive shaft case 20 in the axial direction and having a brake pad 18 fixed to an end thereof.
And a drive shaft 21 interposed between the drive shaft case 20 and the drive shaft 21.
22 that urges the sliding surface 17a or 17b in the direction of
And a pressurizing device 23 that applies hydraulic pressure to a space Q formed by the drive shaft case 20 and the drive shaft 21 to move the drive shaft 21 in the opposite direction to the bias of the spring 22 (equivalent to the conventional device). I have. Reference numeral 24 denotes a motor that is directly connected to the shaft 16 and drives the sheave 17.
【００１０】次に動作について説明する。まず、駆動モ
ータ２４の運転で綱車１７が回転することにより綱車１
７に巻き付けられたロープ（図示せず）に吊持された昇
降体（図示せず）が昇降する。駆動モータ２４が稼動中
はブレーキ駆動装置１９が制動解除されブレーキパッド
１８が摺動面１７ａ、１７ｂから離れた状態となってい
る。次に昇降体（図示されてない）の昇降体を停止させ
る場合は、駆動モータ２４を停止させると同時にブレー
キ駆動装置１９の加圧装置２３を解除する。これにより
駆動軸ケース２０内の空間Ｑは減圧さればね２２の付勢
力によって駆動軸２１が移動し、ブレーキパッド１８を
介して綱車１７両側部に形成された摺動面１７ａ、１７
ｂに制動力を与え、昇降体を所定位置に停止させる。Next, the operation will be described. First, the sheave 17 is rotated by the operation of the drive motor 24, so that the sheave 1
An elevating body (not shown) suspended by a rope (not shown) wound around 7 moves up and down. While the drive motor 24 is operating, the brake drive device 19 is released from braking and the brake pad 18 is separated from the sliding surfaces 17a and 17b. Next, when stopping the elevating body (not shown) of the elevating body, the driving motor 24 is stopped and the pressurizing device 23 of the brake driving device 19 is released at the same time. As a result, the space Q in the drive shaft case 20 is decompressed and the drive shaft 21 is moved by the urging force of the spring 22, and the sliding surfaces 17 a, 17 formed on both sides of the sheave 17 via the brake pads 18.
A braking force is applied to b to stop the elevating body at a predetermined position.
【００１１】このように、上記実施の形態１によれば、
綱車１７の両側部に摺動面１７ａ、１７ｂを形成し、こ
の摺動面１７ａ、１７ｂに対しその軸方向両側からブレ
ーキパッド１８を接離可能に構成するようにしたので、
摺動面に潤滑油による影響がなく、全長を短く、かつ高
さも低くでき装置を小形化することが可能になる。ま
た、ブレーキ駆動装置１９をそれぞれの軸受１４，１５
で保持するようにしたので、ブレーキ駆動装置１９が軸
受に一体化されコンパクト化が可能になる。As described above, according to the first embodiment,
Sliding surfaces 17a and 17b are formed on both sides of the sheave 17 and the brake pads 18 are configured to be able to contact and separate from the sliding surfaces 17a and 17b from both sides in the axial direction.
The sliding surface is not affected by the lubricating oil, the overall length is short and the height is low, and the device can be downsized. Further, the brake driving device 19 is connected to the bearings 14 and 15 respectively.
, The brake driving device 19 is integrated with the bearing, and the size can be reduced.
【００１２】なお、この実施の形態１では、ブレーキ駆
動装置１９を保持する保持枠１４ａ、１５ａは軸受１
４，１５の座に立設したものを示したが、図３の
（Ａ）、（Ｂ）に示すように、軸受２５，２６にそれぞ
れ軸と直角で水平方向に突出する保持枠２５ａ，２６ａ
を設けた構成としブレーキ駆動装置１９を保持するよう
にしても同様の効果が得られることは云うまでもない。In the first embodiment, the holding frames 14a and 15a for holding the brake driving device 19 are provided with the bearing 1
4A and 5B, the holding frames 25a, 26a projecting in the horizontal direction at right angles to the shafts are respectively mounted on the bearings 25, 26, as shown in FIGS.
It is needless to say that the same effect can be obtained even if the brake driving device 19 is held by using a configuration provided with
【００１３】実施の形態２．図４はこの発明の実施の形
態２によるエレベータ用巻上機の綱車の構成を示す主要
部の断面図である。図において、２７は軸１６に嵌着さ
れた綱車、２８は綱車２７の軸方向両側にそれぞれ取付
ボルト２９で固着され摺動面３０が形成された例えば材
質ＦＣＤ５００でなる摺動部材である。Embodiment 2 FIG. FIG. 4 is a sectional view of a main part showing a configuration of a sheave of an elevator hoist according to a second embodiment of the present invention. In the drawing, reference numeral 27 denotes a sheave fitted to the shaft 16, and reference numeral 28 denotes a sliding member made of, for example, a material FCD500 having a sliding surface 30 fixed to both axial sides of the sheave 27 with mounting bolts 29. .
【００１４】次に動作について説明する。一般にエレベ
ータ用巻上機の綱車にはＦＣＤダクタイル鋳鉄が用いら
れているが、使用されるロープの材質に対応してなじみ
の良い硬度が選定され、例えば比較的低層階ビルでは軟
らかいＥ種ロープが使用されているため、綱車材質はＦ
ＣＤ５００（ブリネル硬さ１８０〜２００）を、超高層
階ビルでは硬いＡ種ロープが使用されているため、綱車
材質はＦＣＤ６００（ブリネル硬さ２３０〜２７０）が
用いられている。このような硬度の相違がブレーキ摺動
面の摩擦係数の相違となり、特に硬度が高くなると摩擦
係数が安定しないことがあるため、摺動面の材質を比較
的硬度の低いＦＣＤ５００に統一することが望ましい。Next, the operation will be described. Generally, FCD ductile cast iron is used for the sheave of the elevator hoist. However, a suitable hardness is selected according to the rope material used. For example, in a relatively low-rise building, a soft E-class rope is used. Is used, so the sheave material is F
Since CD500 (Brinell hardness 180 to 200) is used and a hard A-class rope is used in a high-rise building, the sheave material is FCD600 (Brinell hardness 230 to 270). Such a difference in hardness results in a difference in the friction coefficient of the brake sliding surface. In particular, when the hardness is high, the friction coefficient may not be stable. desirable.
【００１５】このように、上記実施の形態２によれば、
綱車の摺動面３０を綱車２７に対して着脱可能な摺動部
材２８で形成するようにしたので、綱車２７が異なる材
質のものに変わっても同じ摺動部材２８を使うことによ
り、摩擦係数が一定に維持されるため制動トルクを安定
させることが可能となる。As described above, according to the second embodiment,
Since the sliding surface 30 of the sheave is formed of a sliding member 28 that can be attached to and detached from the sheave 27, the same sliding member 28 can be used even if the sheave 27 is replaced with a different material. Since the friction coefficient is kept constant, the braking torque can be stabilized.
【００１６】[0016]
【発明の効果】以上のように、この発明の請求項１によ
れば、ベッドに固定された一対の軸受と、この両軸受間
に回転可能に支持された綱車と、この綱車の回転に制動
をかけるブレーキ装置とを備えたエレベータ用巻上機に
おいて、ブレーキ装置を、綱車の両側部に形成された摺
動面と、この摺動面に対しその軸方向両側から接離可能
に構成されたブレーキパッドとで構成したので、摺動面
に潤滑油による影響がなく、かつ装置を小形化すること
が可能なエレベータ用巻上機を提供することができる。As described above, according to the first aspect of the present invention, the pair of bearings fixed to the bed, the sheave rotatably supported between the two bearings, and the rotation of the sheave An elevator hoist equipped with a brake device that applies braking to a sheave, the brake device being capable of coming into contact with and separating from sliding surfaces formed on both sides of the sheave from both axial sides of the sliding surface. Since the present invention is configured with the brake pad configured as above, it is possible to provide an elevator hoisting machine in which the sliding surface is not affected by lubricating oil and the apparatus can be downsized.
【００１７】また、この発明の請求項２によれば、請求
項１において、摺動面を綱車と着脱可能な部材で形成す
るようにしたので、綱車が異なる材質のものに変わって
も同じ摺動面にすることができ、摩擦係数が一定に維持
されるため制動トルクを安定させることが可能なエレベ
ータ用巻上機を提供することができる。According to a second aspect of the present invention, in the first aspect, since the sliding surface is formed of a member detachable from the sheave, even if the sheave is made of a different material. It is possible to provide an elevator hoist that can have the same sliding surface and can stabilize the braking torque because the friction coefficient is kept constant.
【図１】 この発明の実施の形態１のエレベータ用巻上
機の構成を示し、（Ａ）はその正面図、（Ｂ）はその側
面図である。FIG. 1 shows a configuration of an elevator hoist according to a first embodiment of the present invention, in which (A) is a front view and (B) is a side view.
【図２】 ブレーキ駆動装置の構成を示す断面図であ
る。FIG. 2 is a cross-sectional view illustrating a configuration of a brake driving device.
【図３】 この発明の実施の形態１における他の実施の
形態の構成を示し、（Ａ）はその正面図、（Ｂ）はその
側面図である。FIGS. 3A and 3B show a configuration of another embodiment of the first embodiment of the present invention, wherein FIG. 3A is a front view and FIG. 3B is a side view.
【図４】 この発明の実施の形態２のエレベータ用巻上
機の綱車の構成を示す主要部の断面図である。FIG. 4 is a sectional view of a main part showing a configuration of a sheave of an elevator hoist according to a second embodiment of the present invention.
【図５】 従来のエレベータ用巻上機の構成を示す部分
断面した正面図である。FIG. 5 is a partially sectional front view showing a configuration of a conventional elevator hoist.
【図６】 従来のエレベータ用巻上機の他の構成を示す
部分断面した正面図である。FIG. 6 is a partially sectional front view showing another configuration of a conventional elevator hoist.
１３ ベッド、１４，１５ 軸受、１７ 綱車、１７
ａ，１７ｂ 摺動面、１８ ブレーキパッド、１９ ブ
レーキ駆動装置、２７ 綱車、２８ 摺動部材、３０
摺動面。13 beds, 14, 15 bearings, 17 sheaves, 17
a, 17b sliding surface, 18 brake pad, 19 brake drive, 27 sheave, 28 sliding member, 30
Sliding surface.
Claims (2)
両軸受間に回転可能に支持された綱車と、この綱車の回
転に制動をかけるブレーキ装置とを備えたエレベータ用
巻上機において、上記ブレーキ装置は、上記綱車の両側
部に形成された摺動面と、この摺動面に対しその軸方向
両側から接離可能に構成されたブレーキパッドとを備え
たことを特徴とするエレベータ用巻上機。1. An elevator hoist comprising: a pair of bearings fixed to a bed; a sheave rotatably supported between the bearings; and a brake device for braking the rotation of the sheave. In the above, the brake device comprises a sliding surface formed on both sides of the sheave, and a brake pad configured to be able to contact and separate from the sliding surface from both sides in the axial direction. Elevator hoist.
れていることを特徴とする請求項１に記載のエレベータ
用巻上機。2. The elevator hoist according to claim 1, wherein the sliding surface is formed of a member detachable from the sheave.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14960698A JP3617771B2 (en) | 1998-05-29 | 1998-05-29 | Elevator hoisting machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14960698A JP3617771B2 (en) | 1998-05-29 | 1998-05-29 | Elevator hoisting machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH11335041A true JPH11335041A (en) | 1999-12-07 |
| JP3617771B2 JP3617771B2 (en) | 2005-02-09 |
Family
ID=15478893
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14960698A Expired - Lifetime JP3617771B2 (en) | 1998-05-29 | 1998-05-29 | Elevator hoisting machine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3617771B2 (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002020064A (en) * | 2000-07-07 | 2002-01-23 | Mitsubishi Electric Corp | Winch for elevator |
| EP1481937A1 (en) * | 2003-05-30 | 2004-12-01 | Warner Electric Europe S.A.S | Modular and adaptable brake system for an elevator sheave |
| CN1297467C (en) * | 2003-12-04 | 2007-01-31 | 扬州三星电梯有限公司 | Permanent magnet synchronous high-speed tractive machine without gear wheel |
| CN1304267C (en) * | 2004-10-09 | 2007-03-14 | 扬州三星电梯有限公司 | Three-point permanent magnetic synchronous non-gearing tractor sets |
| CN109986386A (en) * | 2019-05-13 | 2019-07-09 | 福建南铝车辆零部件有限公司 | A kind of elevator brake plate machining device and processing method |
| US10618775B2 (en) | 2016-11-18 | 2020-04-14 | Otis Elevator Company | Retrofitting an elevator machine with primary and secondary braking |
| US10737908B2 (en) | 2016-11-22 | 2020-08-11 | Otis Elevator Company | Method and kit for retrofitting elevator machines with thrust bearing, and retrofitted elevator machine |
-
1998
- 1998-05-29 JP JP14960698A patent/JP3617771B2/en not_active Expired - Lifetime
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002020064A (en) * | 2000-07-07 | 2002-01-23 | Mitsubishi Electric Corp | Winch for elevator |
| EP1481937A1 (en) * | 2003-05-30 | 2004-12-01 | Warner Electric Europe S.A.S | Modular and adaptable brake system for an elevator sheave |
| US7104367B2 (en) | 2003-05-30 | 2006-09-12 | Warner Electric Europe S.A.S. | Modular and adaptable brake system for an elevator sheave |
| CN1297467C (en) * | 2003-12-04 | 2007-01-31 | 扬州三星电梯有限公司 | Permanent magnet synchronous high-speed tractive machine without gear wheel |
| CN1304267C (en) * | 2004-10-09 | 2007-03-14 | 扬州三星电梯有限公司 | Three-point permanent magnetic synchronous non-gearing tractor sets |
| US10618775B2 (en) | 2016-11-18 | 2020-04-14 | Otis Elevator Company | Retrofitting an elevator machine with primary and secondary braking |
| US11377323B2 (en) | 2016-11-18 | 2022-07-05 | Otis Elevator Company | Retrofitting an elevator machine with primary and secondary braking |
| US10737908B2 (en) | 2016-11-22 | 2020-08-11 | Otis Elevator Company | Method and kit for retrofitting elevator machines with thrust bearing, and retrofitted elevator machine |
| US11299374B2 (en) | 2016-11-22 | 2022-04-12 | Otis Elevator Company | Method and kit for retrofitting elevator machines with thrust bearing, and retrofitted elevator machine |
| CN109986386A (en) * | 2019-05-13 | 2019-07-09 | 福建南铝车辆零部件有限公司 | A kind of elevator brake plate machining device and processing method |
| CN109986386B (en) * | 2019-05-13 | 2024-03-15 | 福建省华银铝业有限公司 | Elevator brake pad processing device and processing method |
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| Publication number | Publication date |
|---|---|
| JP3617771B2 (en) | 2005-02-09 |
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