JPS5966015A - Motor-driven operation unit - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a driving electric motor that decelerates and rotates a transmission shaft through a gear system, and a transmission member that performs a linear motion by the transmission shaft and a crank that engages with the transmission member. Regarding an electric operating device that converts motion back into rotational movement of the crankshaft and remotely controls a load switch, disconnector, etc. via an operating lever connected to the crankshaft, 1. This is the best electric operating device of this type. It is also required that the device operates reliably and is small and inexpensive. As a conventional electric operating device, one having the configuration shown in FIGS. 1 and 2 is well known. In FIGS. 1 and 2, a reversible rotary partial drive motor 10 is decelerated by a pinion 2 installed at the end of the rotor shaft and a gear 3 engaged with the pinion, and is transmitted to the transmission shaft 4. A moving nut 5 is fitted into a threaded portion 8 cut in the center of the transmission shaft 4. The pin 13 provided at the lower end of the movable nut 5 is inserted into the parallel groove of the guide rail 17 arranged parallel to the transmission shaft 4 and is prevented from rotating, so it will not move even if the transmission shaft 4 rotates. The nut 5 itself does not rotate, but simply moves linearly from side to side on the threaded portion 8 of the transmission shaft 4 in response to the thrust of the screw. The linear motion of the moving nut 5 is again converted into rotational motion of the crankshaft 7 via the crank 6 which engages with it. As shown in Fig. 1, an operating lever 9 is connected to the crankshaft 7, and the movement of the operating lever 9 is transmitted to operating levers such as load switches and disconnectors via an operating tube (not shown). These can be opened and closed by remote control.

Even if the moving nut 5 disengages from the threaded portion 8 of the transmission shaft 4, the crank 6 will not rotate the crankshaft 7 any further due to their mutual engagement. The moving nut 5 does not operate even if an abnormal external force such as electromagnetic force generated by a short circuit current in a load switch or disconnector is applied. When the end is reached, that is, when the crank 6 is rotated by a predetermined angle to either the left or right side, the moving nut 5 operates the entry limit switch 10 or 10a and the engaged brake switch 11 or lla. When the entry limit switch 10-1 or 10a is operated, the switch of the control circuit is released and the power supply to the drive motor 1 is cut off. Subsequently, the brake switch 11 or lla is operated, and the braking resistor 15 is applied to the circuit of the drive motor 1, so that the drive motor is rapidly braked. Springs 12 and 12a arranged on both sides of the threaded portion 8 of the transmission shaft 4 prevent the moving nut 5 that has deviated from the threaded portion 8 from rotating the transmission shaft 4 in a slow reverse direction when manually operating an electric actuator, for example. It is provided so that it can be returned to the threaded portion 8 by. When operating the electric actuator manually, a manual handle is inserted into the shaft end 14 of the transmission shaft 4 and rotated. At this time, a locking switch (not shown) is operated to interlock the electric and manual modes.

In the electric actuator configured as described above, the brake Xl1b circuit is not formed due to, for example, malfunction of the brake switch 11 or lla or incorrect wiring of the circuit of the drive motor 1, and therefore the brake of the drive motor 1 is not activated. If this were not done, the inertia of the drive motor 1 would lead to the displacement nut 5 slipping away from the threaded portion 8 of the transmission shaft 4. When the drive motor l is rotated in such a state, even though the springs 12 are arranged on both sides of the threaded part 8 of the transmission shaft 4, the fast rotation of the transmission shaft 4 causes the movement of the nut 5 and the threaded part 8. The engagement with the screwman Ul was not carried out smoothly, and the screwdriver Il
F-1 if there is a risk that electric machine h machine 1 will be restrained and phased.
There are 9 drawbacks. .

7F's ``IL1; motion actuator configuration eliminates this drawback; It is necessary to increase the length of the transmission shaft 4, and accordingly, it is necessary to increase the diameter of the transmission shaft 4 in order to prevent the strength of the transmission shaft 4 from decreasing against bending and torsion. As a result, the external dimensions of the electric operating device become smaller, the weight increases, and the cost inevitably increases.

In view of the above-mentioned drawbacks of conventional electric actuators, the present invention has been developed so that when transmitting the rotational force of the drive motor to the crankshaft, the transmission member is placed in a predetermined relationship f~ with respect to the transmission shaft and the crank. It is an object of the present invention to provide a small, inexpensive, and highly reliable electric actuator that does not deviate from the driving motor and does not require a braking circuit for the drive motor.

According to the present invention, in the electric actuator of the present invention, a worm wheel is fixed to the transmission shaft, and an operation plate is provided which engages with both a pin provided on a worm wheel rotated by the worm and the crank. A guide groove is disposed on both sides of the worm wheel, and a recess is provided at the end of the operation plate corresponding to the pin, and a guide groove is provided in a fixed guide plate at the opposite end corresponding to the crank. The worm wheel is rotated by driving the drive motor, and the pin is moved into the recess of the operation plate to move the operation plate. This is achieved by rotating the crank which moves along the guide groove and engages the roller, thereby driving an operating lever coupled to the crankshaft.

Next, the present invention will be explained in detail based on embodiments shown in the drawings.

In FIGS. 3 and 4, a worm 19 is fixed to a transmission shaft 18 that rotates for deceleration by a pinion 2 provided at the end of the rotor shaft of the reversible rotation drive motor 1 and a gear 3 that engages with the pinion 2. The rotation ll'llll 21 of the worm wheel 2o arranged corresponding to the worm 19 is pivotally supported by the case 4o of the electric operating device. Worm wheel 2
The bins 22 and 22a are fixed to both sides of o. On the other hand, the crankshaft 30 of the crank 31.degree. 31a is similarly supported by the case 40, and the guide plates 26, 26R are similarly fixedly disposed on the case 40 between the cranks 31, 31af.

Operation plates 23 are provided on both sides of the worm wheel 200 to interlock the worm wheel 20 and the crank 31.31a.
．． 23a is arranged. At the end of the worm wheel (fill) of the operation plate 23.23a there is a recess 41.41a corresponding to the bottle 22.22a, and at the end on the crank side there is a guide groove 42.41a provided in the guide plates 26, 26a. A bin 24 is provided which holds rollers 25, 25a which are guided along the edge of the crank 31.31a.
5.25a moves along the edge of the guide groove 42.42a in a similar manner 2 thereby causing the crankshaft 30
rotates. The operation plate 23.23n is the worm wheel 2
Its lower surface is supported by a screw spring 29 and a presser plate 28 so as to maintain a predetermined position between the crank 31 and the crank 31.

When the joint motor 1 is driven, the transmission shaft 18 is rotated at a reduced speed via the pinion 2 and gear 3, and the worm wheel 2o is rotated by the worm 19. Then, the bins 22, 22a fixed to both sides of the worm wheel 2o rotate about the worm wheel shaft 21 as shown by the arrows in FIG. When the bottle 22.22a is placed in the recess 41.degree. 41a of the operating plates 23, 23a, the operating plate 23.23a moves to the left in FIG. 3 as the worm wheel 20 rotates. The worm wheel 20 is the bin 22.22
Approximately 18 from the position of X7 people in recess 41.41a of a
When rotated by 0°, the recesses 41, 41a for the bins 22, 22a
to leave again. After that, wow~)・Wheel 20
Even if the bins 22.22a contact the operating plates 23, 23a as the pins 22.22a rotate, the operating plates 23.23a will not move the bins 24 of the rollers 25, 25a located at the ends of the guide grooves 42.42a, as shown in FIG. It only moves up and down as the center, but does not move left and right. The worm wheel 20 rotates in the opposite direction and the operation plate 2
3 and 23a move to the right, as shown in FIG. 6, the operation plate 23.23a moves up and down just by positioning the roller 25.25a at the opposite end of the guide groove 42.42a. The same goes for only doing the same thing.

As mentioned above, the operation plate 23.23a moves to the left and the guide groove 4
2. Roller 25 + 2 moving along the lower edge of 42a
5a moves from one end of the guide groove 42.42a to the other, the crank 31.31a that engages with the roller 25.25a also rotates to the left, causing the cranks 31,3
A crankshaft 30 coupled to 1a rotates. When the crankshaft 30 rotates, the operating lever 33.33a is operated via the flange 32.32a connected thereto as shown in FIG.
is operated, and the load switch and disconnector control levers are operated via a control tube (not shown) to open and close these by spaced operation.

The cranks 31, 31a rotate by a predetermined angle, and the rollers 25,
After the guide groove 25a reaches either end of the guide groove 42.42a, the crank 31 remains stable even if an abnormal external force such as an electromagnetic force generated by a short-circuit current of a load switch or disconnector during closing is applied. As shown in FIG. 7, the lower edge surfaces 44.44a of both ends of the guide groove 42.42a hold the cranks 31, 3 in the predetermined position 1 completely.
It is parallel to the lower surface 43 of the inverted square shape of 1a, or it is inclined so as to open by an L minute angle O.

Further, when the worm wheel 20 is rotated forward or backward, the bin 22.
22a must be located in the recesses 41, 4 of the operation panels 23, 23a]
, the operation plate 23.23a so that you can press the button accurately
The r-troller 25° 25a, which determines the final position 1 of
．． 46a, the holding plate 28 supports the operating plate 23.23a in a predetermined position by the torsion spring 29.

When manually operating the device of the present invention, the manual handle 36 may be inserted into the transmission shaft 18, and the groove at the tip of the manual handle 36 may be engaged with the pin 39 provided on the transmission shaft and turned. At this time, the lock switch 38 is operated via the lever 37 to interlock the electric and manual modes. Crankshaft 3 for manual
The final position of rotation of o can be detected by a switch 34 operated by a lever 35 fixed thereto.

As explained above, the drive motor decelerates and rotates the transmission shaft by using all the valves of the gear system, and cranks the linear interlocking again via the transmission member that performs linear motion by the transmission shaft and the crank that engages with the transmission member. In the electric operating device that converts the rotational movement of the Itl+ into the rotational movement of the Itl+ and remotely controls a load switch 7 disconnector etc. via an operating lever coupled to the crank Iil+, a worm is fixed to the transmission shaft and is rotated by the worm. An operation plate that fits both a bottle provided on the worm wheel and the crank is arranged on both sides of the worm wheel, and a recess is provided at the end of the operation plate corresponding to the bottle, and a recess is provided on the opposite side. A roller guided by a guide groove provided on a fixed guide plate is disposed at the end corresponding to the crank, and the worm wheel is rotated by driving the drive motor, and the bottle is moved into the recess. Nigan Daitete previous H13 operation board'
ff: the drive motor is moved by moving the roller along the guide groove and rotating the crank that engages the roller to drive an operating lever coupled to the crankshaft. When transmitting rolling force to the crankshaft, the operating plate never deviates from its predetermined relative position with respect to the transmission shaft and the crank, and therefore there is no need to provide a braking circuit to the drive motor, making the electric actuator compact. It has the effect of being inexpensive and increasing its reliability.

[Brief explanation of the drawing]

1 and 2 are a plan view and a side view schematically showing the configuration of a conventional electric actuator, and FIGS. 3 and 4 are electric actuators of the present invention.
b shows a side view and a front view schematically showing the configuration of the operating device. FIGS. 5 and 6 are schematic diagrams showing the relative relationships among the bottle, the operating plate, and the crank at the final position of the operating plate when the worm wheel rotates forward and backward, respectively, in the electric operating device of the present invention. Figure 7 shows the rollers shown in Figure 6;
FIG. 3 shows a schematic diagram showing the relative relationship between a guide groove and a crankshaft restraining spring. 1- Drive box, motive, 2.3 Gear device, 18 Transmission shaft, 19 Worm, 20 Worm wheel, 22.2
2g bottle, 23.23a operation board, 25.25a
Roller, 26, 26a Guide plate, 30 Crankshaft, 31, 31a Crank, 33.33a - Operation lever, 41.41a - Recess in operation plate, 42.42a
Guide groove on guide board.

Claims (1)

[Scope of Claims] 1) A drive motor causes a transmission shaft to be rotated at a reduced speed through a gear device f, and a transmission member that performs linear motion by the transmission shaft and a crank that engages with the transmission member are used to rotate the transmission shaft in a linear manner. In an electric operating device that converts motion back into rotational motion of a crankshaft and remotely controls a load switch, a disconnector, etc. via an operating lever coupled to the crankshaft, a worm is fixed to the transmission shaft and the worm is An operation plate that engages both the crank and a pin provided on a worm wheel rotated by the worm wheel is disposed on both sides of the worm wheel, and a tit is attached to the end of the operation plate corresponding to the pin.
, rollers guided by guide grooves provided on a fixed guide plate are disposed at the end corresponding to the crank on the opposite side, and the drive motor is driven. - When the wheel rotates, the pin enters the recess to move the operation plate, and at this time, the roller moves along the guide groove and rotates the crank that engages with the roller, causing the crankshaft to move. An electric operating device that drives an operating lever connected to the.