JPH0318584A - Hydraulic power unit for hydraulic elevator - Google Patents

Hydraulic power unit for hydraulic elevator

Info

Publication number
JPH0318584A
JPH0318584A JP1150239A JP15023989A JPH0318584A JP H0318584 A JPH0318584 A JP H0318584A JP 1150239 A JP1150239 A JP 1150239A JP 15023989 A JP15023989 A JP 15023989A JP H0318584 A JPH0318584 A JP H0318584A
Authority
JP
Japan
Prior art keywords
oil
hydraulic
detector
electric motor
power unit
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
Application number
JP1150239A
Other languages
Japanese (ja)
Other versions
JPH0759463B2 (en
Inventor
Motoo Shimoaki
下秋 元雄
Yoshio Kamiya
神谷 代詞男
Hiroshi Ushida
博 牛田
Yukihiro Takigawa
行洋 瀧川
Tatsuo Miyake
三宅 立郎
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP1150239A priority Critical patent/JPH0759463B2/en
Publication of JPH0318584A publication Critical patent/JPH0318584A/en
Publication of JPH0759463B2 publication Critical patent/JPH0759463B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02BCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B50/00Energy efficient technologies in elevators, escalators and moving walkways, e.g. energy saving or recuperation technologies

Abstract

PURPOSE:To improve the detection precision by arranging a detection part in a detector arranged onto the rotary shaft of an electric motor in the inside upper part and sealing the detection part by an oiltight seal and detecting the revolution speed in working oil and storing a slight quantity of oil which intrudes into the detection part, in the lower part. CONSTITUTION:The detection part 15 of a detector 10 is arranged in the upper part 10a inside the detector, and an oil seal consisting of an oil seal 16 and an O-ring 17 is applied onto the periphery of the detector 10. Therefore, the detector 10 has a structure preventing the intrusion of working oil 2 into the detector. Even if a small quantity of oil intrudes into the detector, working oil is stored in the space in the lower part 10b in the detector, and the oil does not adhere onto the detector 15. Therefore, the performance of the electric parts is not deteriorated, and the revolution speed of an electric motor 3 in the working oil can be detected correctly, and reliability is improved.

Description

【発明の詳細な説明】 [産業上の利用分野] この発明は油圧エレベータの油圧パワーユニットに関す
るものであり、特に、油タンク内に電動機及び油圧ボン
ブを設けた油圧エレベータの油圧[従来の技術] 第3図は、特開昭62−275986号公報、特開昭6
4−34881号公報等に記載されている従来の油圧エ
レベータの油圧パワーユニットを示す縦断面図である。
[Detailed Description of the Invention] [Industrial Application Field] This invention relates to a hydraulic power unit for a hydraulic elevator, and particularly relates to a hydraulic power unit for a hydraulic elevator having an electric motor and a hydraulic bomb installed in an oil tank [Prior Art] Figure 3 is from JP-A-62-275986 and JP-A-6
FIG. 4 is a vertical cross-sectional view showing a hydraulic power unit of a conventional hydraulic elevator described in Japanese Patent No. 4-34881 and the like.

図において、(1)は油タンク、(2)はこの油タンク
(1)内に貯溜されている作動油、(3)は油タンク(
1)内の作動油(2)中に浸漬した状態で配設されてい
る電動機である。(4)は電動機(3)により駆動して
作動油(2)を吐出する油圧ポンプであり、電動機(3
)と同様に油タンク(1)内の作動油(2)中に浸漬さ
れている。
In the figure, (1) is the oil tank, (2) is the hydraulic oil stored in this oil tank (1), and (3) is the oil tank (
The electric motor is immersed in hydraulic oil (2) in (1). (4) is a hydraulic pump that is driven by an electric motor (3) to discharge hydraulic oil (2);
) is immersed in hydraulic oil (2) in the oil tank (1).

(5)は油圧ポンプ(4)に接続され作動油(2)を吐
出する吐出管、(6)は吐出管(5)に接続されて流量
制御弁として機能する油圧バルブである。この油圧バル
ブ(6)は油圧ボンブ(4)から吐出される作動油(2
)を被作動部に送出する動作と、逆に、被作動部から戻
る作動油(2)を油タンク(1)内に環流する動作とを
切換えるとともに、作動油(2)の流量の調整を行なう
(5) is a discharge pipe that is connected to the hydraulic pump (4) and discharges the hydraulic oil (2), and (6) is a hydraulic valve that is connected to the discharge pipe (5) and functions as a flow rate control valve. This hydraulic valve (6) is connected to the hydraulic oil (2) discharged from the hydraulic bomb (4).
) to the operated part and, conversely, the operation of circulating the hydraulic oil (2) returning from the operated part into the oil tank (1), and also adjust the flow rate of the hydraulic oil (2). Let's do it.

(7)は作動油(2)により作動する被作動部である油
圧ジャッキ、(8)は油圧ジャッキ(7)と油圧バルブ
(6)とを接続する配管、(9)は油圧ジャッキ(7)
により昇降するエレベータの乗りかごである。また、(
3a)は作動油(2)中に浸漬した電動機(3)の回転
軸で、油タンク(1)を貫通している。(1a)は前記
油タンク(1)とそれを貫通した回転軸(3a)との間
の油漏れを防止する封止手段である。そして、(10)
は回転軸(3a)の回転、即ち、電動機(3)の回転を
検出する検出器である。
(7) is a hydraulic jack which is an actuated part operated by hydraulic oil (2), (8) is a pipe connecting the hydraulic jack (7) and the hydraulic valve (6), and (9) is the hydraulic jack (7)
This is an elevator car that goes up and down. Also,(
3a) is a rotating shaft of an electric motor (3) immersed in hydraulic oil (2), passing through the oil tank (1). (1a) is a sealing means for preventing oil leakage between the oil tank (1) and the rotating shaft (3a) passing through it. And (10)
is a detector that detects the rotation of the rotating shaft (3a), that is, the rotation of the electric motor (3).

従来の油圧エレベータの油圧パワーユニットは上記のよ
うに構成されていた。
The hydraulic power unit of a conventional hydraulic elevator was constructed as described above.

油タンク(1)内の作動油(2)中に浸漬した電動機(
3)及び油圧ポンプ(4)によって、油圧バルブ(6)
を介して作動油(2)を被作動部に送出するとともに、
前記油圧バルブ(6)を介して作動油(2)を油タンク
(1)内に環流させ、油圧パワーユニット機構を構成し
ている。すなわち、油圧パワーユニット機構は、油圧ジ
ャッキ(7)へ作動油(2)を送出したり、または、油
圧ジャッキ(7)から作動油(2)を油タンク(1)に
環流することにより、乗りかご(9)の昇降動作を制御
している。
The electric motor (
3) and hydraulic pump (4), hydraulic valve (6)
The hydraulic oil (2) is sent to the operated part via the
Hydraulic oil (2) is circulated into the oil tank (1) through the hydraulic valve (6) to constitute a hydraulic power unit mechanism. That is, the hydraulic power unit mechanism supplies the hydraulic oil (2) to the hydraulic jack (7) or circulates the hydraulic oil (2) from the hydraulic jack (7) to the oil tank (1), thereby controlling the passenger car. (9) The lifting and lowering operations are controlled.

この油圧パワーユニット機構の動作について以下に詳述
する。
The operation of this hydraulic power unit mechanism will be described in detail below.

電動機(3)により油圧ポンプ(4)が回転すると、作
動油(2)は油圧ポンプ(4)一吐出管(5)→油圧バ
ルブ(6)一配管(8)を経て油圧ジャッキ(7)に送
出され、乗りかご(9)が上昇する。
When the hydraulic pump (4) is rotated by the electric motor (3), the hydraulic oil (2) passes through the hydraulic pump (4), discharge pipe (5), hydraulic valve (6), and pipe (8) to the hydraulic jack (7). The car is sent out and the car (9) rises.

一方、油圧バルブ(6)を切換えると、油圧ジャッキ(
7)内の作動油(2)は油圧ジャッキ(7)一配管(8
)一油圧バルブ(6)一吐出管(5)を経て油タンク(
1)内に環流し、乗りかご(9)は下降する。
On the other hand, when the hydraulic valve (6) is switched, the hydraulic jack (
Hydraulic oil (2) in 7) is connected to hydraulic jack (7) and piping (8).
) One hydraulic valve (6) One discharge pipe (5) to the oil tank (
1) The car (9) descends.

なお、この種の油圧エレベータの油圧パワーユニットで
は、電動機(3)の冷却、スペースの節約及び騒音の低
減等の種々の理由から、電動機(3)及び油圧ポンプ(
4)を油タンク(1)内の作動油(2)中に浸漬してい
る。そして、通常、電動機(3)の回転数を検出して、
この電動機(3)の回転数を制御することにより、作動
油(2)の送油量及び還流量を適宜調整し、乗りかご(
9)の移動速度の制御を行なっている。
In addition, in the hydraulic power unit of this type of hydraulic elevator, the electric motor (3) and the hydraulic pump (
4) is immersed in the hydraulic oil (2) in the oil tank (1). Then, usually, the rotation speed of the electric motor (3) is detected,
By controlling the rotation speed of this electric motor (3), the amount of oil sent and the amount of recirculation of the hydraulic oil (2) can be adjusted appropriately, and the
9) The movement speed is controlled.

[発明が解決しようとする課題コ 上記のような従来の油圧エレベータの油圧パワーユニッ
トでは、例えば、特開昭64−34881号公報のよう
に、作動油(2)中に浸漬した電動機(3)の回転軸(
3a)を、油タンク(1)を貫通し、油タンク(1)の
外側に検出器(10)を配設している。これは汎用品の
検出器(10)を使用し、電動機(3)の回転数を精度
よく検出するためであった。
[Problems to be Solved by the Invention] In the conventional hydraulic power unit of the hydraulic elevator as described above, for example, as disclosed in Japanese Patent Application Laid-Open No. 64-34881, the electric motor (3) is immersed in the hydraulic oil (2). Axis of rotation(
3a) penetrates the oil tank (1), and a detector (10) is disposed outside the oil tank (1). This was to accurately detect the rotation speed of the electric motor (3) by using a general-purpose detector (10).

しかし、検出器(10)を油タンク(1)の外部に装着
するためには、通常の電動機(3)よりもその回転軸(
3a)等を延長して油タンク(1)の外部に突出させる
必要があった。このため、この回転軸(3a)と油タン
ク(1)との間からの油漏れを防止するために複雑な構
造の封止手段(1a)を施し、高精度の油密性を確保す
る必要があり、作業性もよくなかった。
However, in order to mount the detector (10) outside the oil tank (1), its rotating shaft (
3a) etc. had to be extended to protrude outside the oil tank (1). Therefore, in order to prevent oil leakage between the rotating shaft (3a) and the oil tank (1), it is necessary to provide a sealing means (1a) with a complicated structure to ensure highly accurate oil tightness. The workability was also poor.

また、作動油(2)中で使用可能な油密形の検出器(1
0)で検出する場合においても、完全な油密状態を維持
することは極めて困難であり、この油密シール部分から
極微量の油が検出器内部に侵入する虞れがあった。特に
、この侵入した油が検出器の検出部に付着すると、電子
部分の性能が低下し、正確な検出ができないことがあっ
た。
In addition, an oil-tight detector (1) that can be used in hydraulic oil (2) is also available.
0), it is extremely difficult to maintain a complete oil-tight state, and there is a risk that a very small amount of oil may enter the inside of the detector from this oil-tight seal. In particular, if this infiltrated oil adheres to the detection part of the detector, the performance of the electronic part may deteriorate and accurate detection may not be possible.

そこで、この発明は電動機の回転数を作動油中で検出す
ることができ、しかも、微量の油の侵入に対しても電動
機の回転数が正確に検出される油圧エレベータの油圧パ
ワーユニットの提供を課題とするものである。
Therefore, an object of the present invention is to provide a hydraulic power unit for a hydraulic elevator that can detect the rotational speed of an electric motor in hydraulic oil and that can accurately detect the rotational speed of an electric motor even when a small amount of oil enters. That is.

[課題を解決するための手段] この発明にかかる油圧エレベータの油圧パワーユニット
は、油タンク(1)内の電動機(3)の回転数を検出す
る検出部(15)を検出器(10)内部の上部(10a
)に配設し、且つ、周囲に油密シールを施した検出器(
10)を装着したものである。
[Means for Solving the Problems] A hydraulic power unit for a hydraulic elevator according to the present invention includes a detection unit (15) for detecting the rotation speed of an electric motor (3) in an oil tank (1), which is located inside a detector (10). Upper part (10a
) with an oil-tight seal around the detector (
10) is installed.

[作用1 この発明の油圧エレベータの油圧パワーユニットにおい
ては、電動機(3)の回転軸(3a)に、その電動機(
3)の回転数を検出するために、検出部(15)を検出
器(10)内部の上部(10a)に配し、油密シールを
施した検出器(10)を装着したものであるから、電動
機(3)の回転数を作動油(2)中で検出することがで
き、しかも、万一、微量の油が検出器(10)内部に侵
入しても、この侵入した油は検出器(10)内部の下部
(10b)に貯留され、検出部(15)に影響を与える
ことがない。
[Function 1] In the hydraulic power unit of the hydraulic elevator of the present invention, the rotating shaft (3a) of the electric motor (3) is connected to the electric motor (3).
In order to detect the rotation speed of 3), the detection part (15) is arranged at the upper part (10a) inside the detector (10), and the detector (10) is equipped with an oil-tight seal. The rotation speed of the electric motor (3) can be detected in the hydraulic oil (2), and even if a small amount of oil enters the inside of the detector (10), this oil will not be able to be detected by the detector. (10) It is stored in the internal lower part (10b) and does not affect the detection part (15).

[実施例] 第1図はこの発明の一実施例である油圧エレベータの油
圧パワーユニットを示す縦断面図である。
[Embodiment] FIG. 1 is a longitudinal sectional view showing a hydraulic power unit of a hydraulic elevator according to an embodiment of the present invention.

図中、(1)から(9)は上記従来例と同一または相当
する構成部分である。そして、この実施例においても上
記従来例と同様の、油タンク(1)内の作動油(2)中
に浸漬した電動機(3)及び油圧ポンプ(4)によって
、油圧バルブ(6)を介して作動油(2)を被作動部に
送出するとともに、前記油圧バルブ(6)を介して作動
油(2)を油タンク(1)内に環流させる油圧パワーユ
ニット機構を有している。なお、この油圧パワーユニッ
ト機構の動作は従来例と同様であるので、ここでは説明
を省略する。
In the figure, (1) to (9) are the same or corresponding structural parts as those of the above-mentioned conventional example. In this embodiment as well, the electric motor (3) and the hydraulic pump (4), which are immersed in the hydraulic oil (2) in the oil tank (1), are operated via the hydraulic valve (6), similar to the conventional example. It has a hydraulic power unit mechanism that delivers hydraulic oil (2) to an actuated part and circulates the hydraulic oil (2) into the oil tank (1) via the hydraulic valve (6). Note that since the operation of this hydraulic power unit mechanism is similar to that of the conventional example, the explanation will be omitted here.

第1図において、(10)は電動機(3)の回転数を検
出するために電動機(3)の回転軸(3a)の端部に装
着した検出器である。この検出器(10)は作動油(2
)中に配設されている。
In FIG. 1, (10) is a detector attached to the end of the rotating shaft (3a) of the electric motor (3) in order to detect the rotation speed of the electric motor (3). This detector (10) is connected to hydraulic oil (2
) is located inside.

つぎに、この検出器(10)の構造について説明をする
。第2図は第1図の油圧エレベータの油圧パワーユニッ
トの電動機の回転数検出機構を示す拡大断面図である。
Next, the structure of this detector (10) will be explained. FIG. 2 is an enlarged sectional view showing a rotation speed detection mechanism of the electric motor of the hydraulic power unit of the hydraulic elevator shown in FIG.

第2図において、(11)は検出器(10)の外郭をな
すハウジング、(12)は電動機(3)の回転軸(3a
)と一体で回転する回転部、(13)は検出器(10)
の固定部で、回転部(12)に対して追随しないように
固定されている。(14)は回転部(12)を固定部(
13)に支承する軸受、(15)は電子部品等からなる
検出部である。この検出部(15)は電子部品等からな
り、検出器(10)内部の上部(1 0 a)に配設さ
れている。一方、この検出部(15)の反対側である検
出器(10)内部の下部(10b)には所定の空間が形
成されている。(16)は回転部(12)と固定部(1
3)との間の油密性を確保するためのオイルシール、(
17)は軸受(14)とハウジング(1l)との間の油
密性を確保するためのOリングである。このように、こ
の検出器(10)の全周には、オイルシール(16)及
びOリング(17)からなる油密シールが施されている
In Fig. 2, (11) is a housing forming the outer frame of the detector (10), and (12) is the rotating shaft (3a) of the electric motor (3).
), (13) is the detector (10)
The fixed part is fixed so as not to follow the rotating part (12). (14) connects the rotating part (12) to the fixed part (
13) is a bearing supported, and (15) is a detection section made of electronic parts and the like. This detection section (15) is made of electronic components and the like, and is arranged at the upper part (10a) inside the detector (10). On the other hand, a predetermined space is formed in the lower part (10b) inside the detector (10) on the opposite side of the detector (15). (16) is the rotating part (12) and the fixed part (1
3) Oil seal to ensure oil tightness between (
17) is an O-ring for ensuring oil tightness between the bearing (14) and the housing (1l). In this way, an oil-tight seal consisting of an oil seal (16) and an O-ring (17) is provided around the entire circumference of this detector (10).

そして、この構成の油圧エレベータの油圧パワーユニッ
トでは、電動機(3)の回転数を検出器(10)で検出
して、この電動機(3)の回転数を運転制御装置(図示
せず)等により制御することにより、作動油(2)の送
油量及び還流量を適宜調整し、乗りかご(9)の移動速
度の制御を行なっている。
In the hydraulic power unit of the hydraulic elevator having this configuration, the rotation speed of the electric motor (3) is detected by the detector (10), and the rotation speed of the electric motor (3) is controlled by an operation control device (not shown) or the like. By doing so, the amount of oil fed and the amount of recirculation of the hydraulic oil (2) are adjusted as appropriate, and the moving speed of the car (9) is controlled.

なお、この検出器(10)としては、ロータリエンコー
ダ等の回転数検出器、回転検出器があり、電動機(3)
の回転数を検出する動作は周知の技術となっている。例
えば、電動機(3)の回転軸(3a)と一体で回転する
回転部(12)の先端の円盤に、一定の間隔を隔てて複
数穿設した所定形状の穿孔に光線等を照射し、この光線
が通過する数をパルスカウントするホトカプラ等の検出
部(15)により電動機(3)の回転数を検出するもの
である。
Note that this detector (10) includes a rotation speed detector such as a rotary encoder, a rotation detector, and a rotation detector such as a rotary encoder.
The operation of detecting the rotational speed of is a well-known technique. For example, a light beam or the like is irradiated onto a plurality of holes of a predetermined shape made at regular intervals in a disc at the tip of a rotating part (12) that rotates integrally with the rotating shaft (3a) of an electric motor (3). The number of revolutions of the electric motor (3) is detected by a detection unit (15) such as a photocoupler that pulse-counts the number of light beams passing through.

この実施例の油圧エレベータの油圧パワーユニットは上
記のように構戊されており、油圧パワーユニット機構の
油タンク(1)の作動油(2)中に浸漬した電動機(3
)の回転軸(3a)に油密シールを施した検出器(10
)が装着されている。
The hydraulic power unit of the hydraulic elevator of this embodiment is constructed as described above, and includes an electric motor (3) immersed in the hydraulic oil (2) of the oil tank (1) of the hydraulic power unit mechanism.
) has an oil-tight seal on its rotating shaft (3a).
) is installed.

したがって、作動油(2)中で電動機(3)の回転数を
検出できるので、従来のように、検出器を油タンク(1
)の外部に装着するために、電動機(3)の回転軸等を
延長して油タンク(1)の外部に突出させる必要がない
。このため、回転軸と油タンク(1)との間からの油漏
れを防止するために複雑な構造のシールを施す必要もな
いので、検出器(10)の取付け作業が簡易にでき、経
済的である。
Therefore, since the rotation speed of the electric motor (3) can be detected in the hydraulic oil (2), the detector cannot be connected to the oil tank (1) as in the conventional case.
), there is no need to extend the rotating shaft of the electric motor (3) to protrude to the outside of the oil tank (1). Therefore, there is no need to provide a seal with a complicated structure to prevent oil leakage between the rotating shaft and the oil tank (1), making the installation of the detector (10) simple and economical. It is.

また、この実施例では、検出器(10)の検出部(15
)を検出器内上部(10a)に配しており、しかも、こ
の検出器(10)の周囲にはオイルシール(16)及び
Oリング(17)からなる油密シールを施している。
Furthermore, in this embodiment, the detection section (15) of the detector (10) is
) is arranged in the upper part (10a) inside the detector, and an oil-tight seal consisting of an oil seal (16) and an O-ring (17) is provided around the detector (10).

したがって、この検出器(10)は検出器内部に作動油
(2)が侵入し難い構造となっている。
Therefore, this detector (10) has a structure that prevents the hydraulic oil (2) from penetrating inside the detector.

そして、万一、微量の油が検出器内部に侵入した場合に
も、検出器内下部(10b)の空間に貯留されるので、
これらの油が検出部(15)に付着しない。このため、
電子部分の性能が低下しないので、作動油(2)中での
電動機(3)の回転数の正確な検出ができ、信頼性が向
上する。
In the unlikely event that a small amount of oil enters the inside of the detector, it will be stored in the space at the bottom (10b) inside the detector.
These oils do not adhere to the detection part (15). For this reason,
Since the performance of the electronic part does not deteriorate, the rotational speed of the electric motor (3) in the hydraulic oil (2) can be accurately detected, improving reliability.

上記のように、この実施例の油圧エレベータの油圧パワ
ーユニットは、油圧パワーユニット機構の油タンク(1
)の作動油(2)中に浸漬した電動機(3)の回転軸(
3a)に、この電動機(3)の回転数を検出するために
、検出部(15)を検出器内上部(1 0 a)に配し
、全周にオイルシール(16)及びOリング(17)か
らなる油密シールを施した検出器(10)を装着したも
のであるから、電動機(3)の回転数を作動油(2)中
で検出することができ、しかも、万一、微量の油が検出
器内部に侵入しても、この侵入した油は検出器内下部(
10b)に貯留されるので、検出部(15)には付着し
ない。したがって、経済的で信頼性の高い電動機(3)
の回転数の検出が可能になる。
As mentioned above, the hydraulic power unit of the hydraulic elevator of this embodiment has an oil tank (1) of the hydraulic power unit mechanism.
) The rotating shaft of the electric motor (3) is immersed in the hydraulic oil (2) of
3a), in order to detect the rotation speed of this electric motor (3), a detection part (15) is arranged in the upper part (10a) inside the detector, and an oil seal (16) and an O-ring (17) are installed around the entire circumference. ) is equipped with a detector (10) with an oil-tight seal, so it is possible to detect the rotational speed of the electric motor (3) in the hydraulic oil (2), and even in the unlikely event that a trace amount of Even if oil enters the inside of the detector, the intruded oil will be stored in the lower part of the detector (
10b), so it does not adhere to the detection part (15). Therefore, an economical and reliable electric motor (3)
It becomes possible to detect the rotation speed of

ところで、上記の実施例では、検出器(10)の油密性
を維持するためにオイルシール(16)及び0リング(
17)からなる油密シールを施したが、これ以外の特殊
パッキンによるシールや、或いは、メカニカルシール等
を採用してもよい。
By the way, in the above embodiment, an oil seal (16) and an O-ring (
Although an oil-tight seal consisting of 17) was applied, a seal using a special packing other than this, a mechanical seal, etc. may be adopted.

また、検出器(10)はロータリエンコーダに限定され
るものではなく、他の検出動作を行なう検出器(10)
であってもよい。
Further, the detector (10) is not limited to a rotary encoder, but a detector (10) that performs other detection operations.
It may be.

[発明の効果] 以上説明したとおり、この発明の油圧エレベータの油圧
パワーユニットは、電動機の回転数を検出するためにそ
の電動機の回転軸に検出器を配設し、その検出器内の検
出部をその内部の上部に配し、それを油密シールで封止
したものであるから、電動機の回転数を作動油中で検出
することができ、しかも、万一、微量の油が検出器内部
に侵入しても、この侵入した油は検出器内下部に貯留さ
れ、検出部には付着しないので、経済的で信頼性の高い
電動機の回転数の検出が可能となる。
[Effects of the Invention] As explained above, the hydraulic power unit of the hydraulic elevator of the present invention includes a detector disposed on the rotating shaft of the electric motor in order to detect the rotation speed of the electric motor, and a detection section in the detector. Since it is placed inside the upper part and sealed with an oil-tight seal, it is possible to detect the rotation speed of the motor in hydraulic oil, and even in the unlikely event that a small amount of oil gets inside the detector. Even if the oil enters the sensor, it is stored in the lower part of the detector and does not adhere to the detection section, making it possible to detect the rotational speed of the motor economically and with high reliability.

【図面の簡単な説明】[Brief explanation of the drawing]

第1図はこの発明の一実施例である油圧エレベータの油
圧パワーユニットを示す縦断面図、第2図は第1図の油
圧エレベータの油圧パワーユニットの電動機の回転数検
出機構を示す拡大断面図、第3図は従来の油圧エレベー
タの油圧パワーユニットを示す縦断面図である。 図において、 1:油タンク     2:作動油 3:電動機     3a:回転軸 4:油圧ボンプ    6:油圧バルブ10:検出器 
   10a:検出器内上部15:検出部     1
6:オイルシール17:Oリング である。 なお、図中、同一符号及び同一記号は同一または相当部
分を示すものである。
FIG. 1 is a longitudinal cross-sectional view showing a hydraulic power unit of a hydraulic elevator according to an embodiment of the present invention, FIG. FIG. 3 is a longitudinal sectional view showing a hydraulic power unit of a conventional hydraulic elevator. In the figure: 1: Oil tank 2: Hydraulic oil 3: Electric motor 3a: Rotating shaft 4: Hydraulic pump 6: Hydraulic valve 10: Detector
10a: Upper part inside the detector 15: Detection part 1
6: Oil seal 17: O-ring. Note that in the drawings, the same reference numerals and symbols indicate the same or equivalent parts.

Claims (1)

【特許請求の範囲】 油タンク内の作動油中に浸漬した電動機及び油圧ポンプ
によって、油圧バルブを介して作動油を被作動部に送出
するとともに、前記油圧バルブを介して作動油を油タン
ク内に環流させる油圧エレベータの油圧パワーユニット
において、 前記電動機の回転数を検出する検出部を、その内部の上
部に配設するとともに、油密シールで封止した検出器を
具備することを特徴とする油圧エレベータの油圧パワー
ユニット。
[Claims] An electric motor and a hydraulic pump immersed in hydraulic oil in an oil tank send hydraulic oil to an actuated part through a hydraulic valve, and also transport hydraulic oil into the oil tank through the hydraulic valve. A hydraulic power unit for a hydraulic elevator, characterized in that a detection unit for detecting the rotational speed of the electric motor is disposed in an upper part of the interior thereof, and a detector sealed with an oil-tight seal is provided. Elevator hydraulic power unit.
JP1150239A 1989-06-13 1989-06-13 Hydraulic power unit for hydraulic elevator Expired - Lifetime JPH0759463B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1150239A JPH0759463B2 (en) 1989-06-13 1989-06-13 Hydraulic power unit for hydraulic elevator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1150239A JPH0759463B2 (en) 1989-06-13 1989-06-13 Hydraulic power unit for hydraulic elevator

Publications (2)

Publication Number Publication Date
JPH0318584A true JPH0318584A (en) 1991-01-28
JPH0759463B2 JPH0759463B2 (en) 1995-06-28

Family

ID=15492604

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1150239A Expired - Lifetime JPH0759463B2 (en) 1989-06-13 1989-06-13 Hydraulic power unit for hydraulic elevator

Country Status (1)

Country Link
JP (1) JPH0759463B2 (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100338715B1 (en) * 2000-04-25 2002-05-30 기길웅 light illumination display board and lamp shade displayed multiple illumination with engraved surface on transparent acrylic plastic plates
KR20020043462A (en) * 2002-03-13 2002-06-10 서대식 Transparency Acryl Door and Acryl Resources with Emitting Light Part
KR20040011325A (en) * 2002-07-29 2004-02-05 백정호 Door having Illumination effect
KR100523213B1 (en) * 2001-08-03 2005-10-24 기길웅 Advertisement Lighting and for Display and Indirect advertisement lamp
JP2007078244A (en) * 2005-09-14 2007-03-29 Takahashi Hosei Kk Damper for air duct

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100338715B1 (en) * 2000-04-25 2002-05-30 기길웅 light illumination display board and lamp shade displayed multiple illumination with engraved surface on transparent acrylic plastic plates
KR100523213B1 (en) * 2001-08-03 2005-10-24 기길웅 Advertisement Lighting and for Display and Indirect advertisement lamp
KR20020043462A (en) * 2002-03-13 2002-06-10 서대식 Transparency Acryl Door and Acryl Resources with Emitting Light Part
KR20040011325A (en) * 2002-07-29 2004-02-05 백정호 Door having Illumination effect
JP2007078244A (en) * 2005-09-14 2007-03-29 Takahashi Hosei Kk Damper for air duct

Also Published As

Publication number Publication date
JPH0759463B2 (en) 1995-06-28

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