JPS6349085Y2 - - Google Patents
Info
- Publication number
- JPS6349085Y2 JPS6349085Y2 JP12586581U JP12586581U JPS6349085Y2 JP S6349085 Y2 JPS6349085 Y2 JP S6349085Y2 JP 12586581 U JP12586581 U JP 12586581U JP 12586581 U JP12586581 U JP 12586581U JP S6349085 Y2 JPS6349085 Y2 JP S6349085Y2
- Authority
- JP
- Japan
- Prior art keywords
- speed
- drive rod
- electric motor
- reducer
- air cylinder
- 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.)
- Expired
Links
- 239000003638 chemical reducing agent Substances 0.000 claims description 12
- 238000011109 contamination Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 239000003595 mist Substances 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000003584 silencer Effects 0.000 description 1
Landscapes
- Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
Description
【考案の詳細な説明】
本考案は電動機の回転をネジを使用して直線運
動に変える電動アクチユエータの速度調節機構に
係り、特に停電時における電動機の高速逆転を防
止しアクチユエータの移動速度を一定以下に保つ
速度調節機構に関する。[Detailed description of the invention] This invention relates to a speed adjustment mechanism for an electric actuator that converts the rotation of an electric motor into linear motion using a screw.In particular, it prevents high-speed reversal of the electric motor during power outages and keeps the actuator moving speed below a certain level. This relates to a speed adjustment mechanism that maintains speed.
たとえば発電用水車を例にとると、水量の調節
のためにガイドベーンを開閉する機構として、ガ
イドベーンには常に保全のためガイドベーンを閉
じる方向の力が作用している。したがつて、水量
調節には閉じる向きの力に抗して力を与えその力
を調節する必要がある。この調節する機構が第１
図に示す電動アクチユエータの速度調節機構であ
る。第１図は従来装置であつて電動機１には歯車
減速機２が連結され、この減速機２にはボールネ
ジ３が連結されている。ボールネジ３にはこのボ
ールネジ３の回転とともに直線移動する駆動杆４
が取付けられ、この駆動杆４と一体に油圧シリン
ダ５内のピストン６が駆動され得る。油圧シリン
ダ５のピストンロツド側と反ピストンロツド側と
の間はしぼり又はオリフイス７を介して連通され
ている。 For example, in a water turbine for power generation, as a mechanism for opening and closing guide vanes to adjust the amount of water, a force is always applied to the guide vanes in the direction of closing them for maintenance purposes. Therefore, in order to adjust the amount of water, it is necessary to apply force against the closing force and adjust that force. This adjusting mechanism is the first
This is a speed adjustment mechanism of the electric actuator shown in the figure. FIG. 1 shows a conventional device, in which a gear reducer 2 is connected to an electric motor 1, and a ball screw 3 is connected to this reducer 2. The ball screw 3 has a drive rod 4 that moves linearly as the ball screw 3 rotates.
is attached, and a piston 6 in a hydraulic cylinder 5 can be driven together with this drive rod 4. The piston rod side and the opposite side of the piston rod of the hydraulic cylinder 5 are communicated via a throttle or orifice 7.
このような構造において、電動機１が停電等に
より無拘束の状態になると、駆動杆４が図中右方
向に動き次第に高速になつて減速機２が増速機と
なり、しまいには電動機１を破損するおそれがあ
る。この破損を防止するため駆動杆４ひいてはピ
ストン６の油の圧縮による機械エネルギをしぼり
又はオリフイス７により油の霧状の膨膨にて熱エ
ネルギに変えて吸収するようになつている。 In such a structure, when the electric motor 1 becomes unrestrained due to a power outage, etc., the drive rod 4 moves to the right in the figure and gradually increases the speed, causing the reducer 2 to become a speed increaser and eventually damage the electric motor 1. There is a risk of In order to prevent this damage, the mechanical energy due to the compression of the oil in the drive rod 4 and, in turn, the piston 6, is squeezed or converted into thermal energy by the expansion of the oil mist and absorbed by the orifice 7.
ところが、このような構造のものにおいては、
油を使用するため油汚染等の問題が生じ、また油
圧機器であるので機器が大形化するという欠点が
ある。 However, in such a structure,
Since oil is used, there are problems such as oil contamination, and since it is a hydraulic device, there is a disadvantage that the device becomes large.
そこで、本考案は上述の欠点に鑑み、汚染を防
止し機器を小形化するようにした電動アクチユエ
ータの速度調節機構の提供を目的とする。 SUMMARY OF THE INVENTION In view of the above-mentioned drawbacks, the present invention aims to provide a speed regulating mechanism for an electric actuator that prevents contamination and reduces the size of the device.
かかる目的を達成するため本考案としては、電
動機の回転軸にブレーキデイスクを取付けると共
に減速機を連結し、この減速機に駆動杆を直線移
動させるボールネジを連結し、上記駆動杆と一体
に駆動されるエアシリンダを備え、このエアシリ
ンダのポートを空圧デイスクブレーキにつなげて
上記駆動杆の電動機逆転方向の高速移動で上記ブ
レーキデイスクを制動したことを特徴とする。 In order to achieve this purpose, the present invention is to attach a brake disc to the rotating shaft of the electric motor, connect a reducer, and connect a ball screw that linearly moves the drive rod to the reducer, so that the motor is driven integrally with the drive rod. A port of the air cylinder is connected to a pneumatic disc brake, and the brake disc is braked by high-speed movement of the drive rod in the reverse direction of the electric motor.
ここで、本考案の実施例を説明する。第２図は
一実施例で、第１図と同一部分には同一符号を付
す。電動機１の回転軸１ａには減速機２が連結さ
れるとともにブレーキデイスク８が取付けてあ
る。減速機２はボールネジ３に連結され、回転を
伝達する。ボールネジ３の回転に対して直線移動
する駆動杆４がボールネジ３に取付けてある。駆
動杆４の移動と対応して移動するよう駆動杆４と
一体にエアシリンダ９のピストン９ａが連結され
ている。エアシリンダ９のピストンロツド側ポー
トP1にはサイレンサ１０が取付けられると共に、
反ピストンロツド側ポートP2は空気配管１１に
連通されている。空気配管１１は空圧デイスクブ
レーキ１２のマスタバツクへのパイロツト圧供給
口に連通されている。 Here, an embodiment of the present invention will be described. FIG. 2 shows one embodiment, and the same parts as in FIG. 1 are given the same reference numerals. A speed reducer 2 is connected to a rotating shaft 1a of the electric motor 1, and a brake disc 8 is attached thereto. The speed reducer 2 is connected to the ball screw 3 and transmits rotation. A driving rod 4 that moves linearly with respect to the rotation of the ball screw 3 is attached to the ball screw 3. A piston 9a of an air cylinder 9 is connected integrally with the drive rod 4 so as to move in correspondence with the movement of the drive rod 4. A silencer 10 is attached to the piston rod side port P1 of the air cylinder 9, and
The port P2 on the side opposite to the piston rod is communicated with the air pipe 11. The air pipe 11 communicates with a pilot pressure supply port to a master bag of a pneumatic disc brake 12.
このような構造において、電動機１が正常運転
している場合、減速機２に伝達された回転はボー
ルネジ３を回転し駆動杆４を図中右方向又は左方
向に移動する。この場合、駆動杆４の直線移動の
速度は電動機１の正常運転の際低速であり、たと
えばピストン９ａが右方向に移動しても低速のた
め空気配管１１には一定以上の圧縮圧が加わらず
外部へ逃げるようになつている。駆動杆４の左方
向移動はたとえば発電機用ガイドベーンを開ける
向きとなり、右方向移動はガイドベーンを閉まる
向きとなる。 In such a structure, when the electric motor 1 is operating normally, the rotation transmitted to the reducer 2 rotates the ball screw 3 and moves the drive rod 4 to the right or left in the figure. In this case, the linear movement speed of the drive rod 4 is low during normal operation of the electric motor 1, and for example, even if the piston 9a moves to the right, the speed is low and no compression pressure above a certain level is applied to the air pipe 11. They are starting to escape to the outside. A leftward movement of the drive rod 4 will, for example, open the generator guide vane, and a rightward movement will cause the guide vane to close.
停電等により電動機１が無拘束状態となつたと
き、駆動杆４に右方向の力が働き駆動杆４の速度
が増大する。このとき、そのまま放置すると電動
機１が高速逆転状態となつて破損するおそれがあ
るのであるが、エアシリンダ９のピストン９ａの
高速右方向移動によりポートP2から圧力の変動
がしぼり又はオリフイス１３を介して空圧デイス
クブレーキ１２に働く。この結果、ブレーキデイ
スク８の回転が抑えられ電動機１が制動される。
すなわち、第３図に示すように通常の速度V1を
超え、速度V2に急に達したとすると、マスタバ
ツクの圧力P1′はP2″に上昇し、ブレーキデイスク
８に空圧デイスクブレーキ１２のパツトが押し付
けられる。このため、速度はV2から低下し圧力
P1″も低下する。この動作をくり返して電動機１
の高速逆転が抑えられる。 When the electric motor 1 becomes unrestrained due to a power outage or the like, a rightward force acts on the drive rod 4 and the speed of the drive rod 4 increases. At this time, if left as is, there is a risk that the electric motor 1 will enter a high-speed reversal state and be damaged; however, due to the high-speed rightward movement of the piston 9a of the air cylinder 9, pressure fluctuations are caused from the port P2 through the throttle or orifice 13. act on the pneumatic disc brake 12. As a result, the rotation of the brake disc 8 is suppressed and the electric motor 1 is braked.
That is, if the normal speed V 1 is exceeded and the speed V 2 is suddenly reached as shown in FIG. Part 12 is pressed.For this reason, the speed decreases from V 2 and the pressure increases.
P 1 ″ also decreases. Repeating this operation, motor 1
High-speed reversal of the speed can be suppressed.
以上実施例にて説明したように本考案によれ
ば、電動機の故障でトルクを発生しなくなつた場
合でも、駆動杆の移動速度が大きくなるとき電動
機の高速回転を防止できることになり、このとき
油圧シリンダを使用しないので油汚染もなく保守
がしやすく、エアシリンダの圧力をパイロツト圧
として使用するのでエアシリンダは小形のもので
良く、また電動機を直接制動するので小さな力で
行なうことができ、また電動サーボとしての信頼
度は向上する。 As explained above in the embodiments, according to the present invention, even if the electric motor stops generating torque due to a failure, it is possible to prevent the electric motor from rotating at high speed when the moving speed of the drive rod increases. Since no hydraulic cylinder is used, there is no oil contamination and maintenance is easy.Since the air cylinder pressure is used as pilot pressure, the air cylinder only needs to be small.Also, since the electric motor is directly braked, it can be done with a small amount of force. Also, reliability as an electric servo is improved.
第１図は従来の電動アクチユエータの速度調節
機構の一例を示す構成図、第２図は本考案による
電動アクチユエータの速度調節機構の一実施例を
示す構成図、第３図は圧力、速度と時間とを示す
特性線図である。
図面中、１電動機、１ａは回転軸、３はボール
ネジ、４は駆動杆、８はブレーキデイスク、９は
エアシリンダ、９ａはピストン、１１は空気配
管、１２は空圧デイスクブレーキである。
Fig. 1 is a block diagram showing an example of a conventional electric actuator speed adjustment mechanism, Fig. 2 is a block diagram showing an example of an electric actuator speed control mechanism according to the present invention, and Fig. 3 is a block diagram showing pressure, speed, and time. FIG. In the drawing, 1 is an electric motor, 1a is a rotating shaft, 3 is a ball screw, 4 is a drive rod, 8 is a brake disc, 9 is an air cylinder, 9a is a piston, 11 is an air pipe, and 12 is a pneumatic disc brake.
Claims (1)
と共に減速機を連結し、この減速機に駆動杆を直
線移動させるボールネジを連結し、上記駆動杆と
一体に駆動されるエアシリンダを備え、このエア
シリンダのポートを空圧デイスクブレーキにつな
げて上記駆動杆の電動機逆転方向の高速移動で上
記ブレーキデイスクを制動した電動アクチユエー
タの速度調節機構。 A brake disc is attached to the rotating shaft of the electric motor, and a reducer is connected to the reducer, a ball screw that moves the drive rod in a straight line is connected to the reducer, and an air cylinder that is driven integrally with the drive rod is provided, and a port of the air cylinder is connected to the reducer. is connected to a pneumatic disc brake, and the speed adjustment mechanism of the electric actuator brakes the brake disc by high-speed movement of the drive rod in the reverse direction of the electric motor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12586581U JPS5834557U (en) | 1981-08-27 | 1981-08-27 | Electric actuator speed adjustment mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12586581U JPS5834557U (en) | 1981-08-27 | 1981-08-27 | Electric actuator speed adjustment mechanism |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5834557U JPS5834557U (en) | 1983-03-07 |
| JPS6349085Y2 true JPS6349085Y2 (en) | 1988-12-16 |
Family
ID=29919680
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12586581U Granted JPS5834557U (en) | 1981-08-27 | 1981-08-27 | Electric actuator speed adjustment mechanism |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5834557U (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0216066Y2 (en) * | 1984-10-13 | 1990-05-01 | ||
| JPH05589Y2 (en) * | 1985-10-14 | 1993-01-08 | ||
| JPH0877Y2 (en) * | 1988-02-12 | 1996-01-10 | 株式会社三協精機製作所 | Motor actuator |
-
1981
- 1981-08-27 JP JP12586581U patent/JPS5834557U/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5834557U (en) | 1983-03-07 |
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