KR102457170B1 - apparatus for limiting electric operated opening and shutting - Google Patents

Abstract

The present invention provides a limit switch to selectively block the rotational output of the motor by rotating the first internal gear is formed along the inner periphery, the serration coupling part is formed along the rear edge of the opening hole formed in the central part, so that the operation interval is finely adjusted. a cam gear unit for operating the ; The cam gear part is individually rotatably coupled to the front side so that a mounting space is formed therein, and a spur gear gear-coupled to the reduction gear part which is connected to the motor along the outer periphery to generate rotational output is formed, and a second internal gear is formed on the inner periphery A fixed gear unit formed with; The central portion is provided in a hollow ring shape, and a plurality of guide pins are provided along the circumferential direction to space apart and support between one side portion disposed to face the rear surface of the cam gear portion and the other side portion disposed to face the front surface of the fixed gear portion. carrier part; a planetary gear rotatably coupled to the guide pin to be rotated in engagement with the first internal gear and the second internal gear, at least one planetary gear being provided in plurality; And coupled to the inner side of the interlocking carrier part to move between the one side part and the other side part, the control handle rotated to set the rotational output limit value of the motor protrudes forward so as to pass through the opening hole and along the circumferential direction It provides a limit device for an electric switchgear comprising a serration part selectively coupled to the serration coupling part is formed and a pressure adjusting part that is elastically supported to the front side through an elastic means provided on the rear side.

Description

Limit device for electric switchgear {apparatus for limiting electric operated opening and shutting}

The present invention relates to a limit device for an electric switch, and more particularly, to a limit device for an electric switch in which the operation interval is finely adjusted.

In general, in a greenhouse for growing plants or raising livestock, control of the internal temperature, humidity and ventilation of the greenhouse is required to provide an optimal environment for the growth of animals and plants. Accordingly, an opening/closing membrane covered on the side or ceiling of the plastic house is installed, and a power device for opening and closing is provided.

1 is a perspective view showing a plastic house to which a conventional electric switchgear is applied.

As shown in FIG. 1 , the plastic house 8 has a sensor 5 for detecting temperature and humidity inside, and a signal sensed by the sensor 5 to control the driving of the motor unit 2 Power installed opposite to each other so that the winding rod between the controller 4 and the driving output shaft 3 rotated by the driving force of the motor 2 winds up or unwinds the opening/closing membrane 6 of the side window in a winding manner. An opening and closing device 10 is provided.

On the other hand, if the start and end of the drive output shaft 3 that is rotated by the motor 2 to open and close the opening and closing film is not set in advance, the motor unit 2 is constantly rotated and the opening and closing film cannot be smoothly opened and closed. there was.

In order to solve this problem, in order to adjust the opening and closing operation to the correct position in winding up or unrolling the side window on one side of the plastic house 8, a limit device for setting the limit value of the power opening and closing device 10 has been partially disclosed. .

In detail, the power switch 10 includes a motor unit 2 and a speed reducer 1 coupled to the motor unit 2 , and a limit device 7 is installed at a lower portion of the motor unit 2 . .

At this time, the limit device 7 may set the opening/closing limit of the opening/closing membrane 6 by correcting or setting the limit value of the rotational output of the power opening/closing device 10 . And, the outer surface of the limit device 7 is provided with a handle portion for setting the opening/closing limit, and a through portion for insertion of the external power line.

And, by attaching a limit switch part to the inside of the limit device 7, when the motor part 2 is rotated by a certain amount, it is configured to stop and rotate again to control the start and end of the opening/closing membrane 6 became

However, when manipulating the rotational output by the handle portion of the limit device 7, it is difficult to precisely fine-tune the opening/closing limit, so there is a problem in that the precision of the driving is lowered. For this reason, there is a problem in that the gap remaining when the opening and closing membrane 6 is opened and closed frequently occurs, which adversely affects the growth of crops.

In addition, the other end side of the handle part is engaged with each gear inside the device to adjust the operating interval of the limit device 7 and rotated integrally. In the prior art, there was a problem in that the operating efficiency is lowered due to the short operating interval per rotation. .

Furthermore, as the gear rotated inside is formed as an eccentric gear or as a single configuration, damage occurs due to an eccentric load or rotation pressure applied directly to the gear during rotation, thereby reducing durability. In addition, there is a problem in that abrasion occurs due to sliding friction between the meshed gears while the handle portion is pressed to adjust the operation interval of the limit device 7 while moving to the rear side to the internal gear.

Korean Patent Registration No. 10-1818042

In order to solve the above problems, the present invention is to provide a limit device for an electric switch in which the operation interval is finely adjusted.

In order to solve the above problems, the present invention is a limit to selectively block the rotational output of the motor by forming a first internal gear along the inner periphery, a serration coupling part is formed along the rear edge of the opening hole formed in the central part, and rotated a cam gear unit for operating the switch; The cam gear part is individually rotatably coupled to the front side so that a mounting space is formed therein, and a spur gear gear-coupled to the reduction gear part which is connected to the motor along the outer periphery to generate rotational output is formed, and a second internal gear is formed on the inner periphery A fixed gear unit formed with; The central portion is provided in a hollow ring shape, and a plurality of guide pins are provided along the circumferential direction to space apart and support between one side portion disposed to face the rear surface of the cam gear portion and the other side portion disposed to face the front surface of the fixed gear portion. carrier part; a planetary gear rotatably coupled to the guide pin to be rotated in engagement with the first internal gear and the second internal gear, at least one planetary gear being provided in plurality; and a serration portion selectively coupled to the serration coupling portion along the circumferential direction, and a control handle rotated to set the rotational output limit of the motor protrudes forward to pass through the opening hole and is provided on the rear side A plurality of pressurizing adjustments coupled to the guide pin and moving along the longitudinal direction, including a pressure adjusting unit that is elastically supported to the front through the resilient means, wherein the pressure adjusting unit is coaxially disposed inside the hollow of the interlocking carrier part. It provides a limit device for an electric switchgear, characterized in that the coupling extension of the dog is spaced apart at equal intervals to the outside in the radial direction of the rear end.

Through the above solution means, the present invention provides the following effects.

First, as it is provided with a simple structure that is self-locked through spring support and serration coupling, the operator presses and rotates the control handle to finely set the driving limit of the motor and then get out of the pressurized state. As long as the control handle is constrained and fixed at the set position, the convenience of operation can be significantly improved.

Second, as the three planetary gears are spaced at equal intervals on the guide pins provided along the circumferential direction of the interlocking carrier and are supported by three-point rotation, the rotational force transmitted to the interlocking carrier through the adjustment handle is biased toward either side of each planetary gear. Since it is transmitted evenly without hitting it, it is possible to prevent the problem of rotational operation feeling or the decrease in operation precision due to the eccentric load.

Third, since the coupling extension radially extending from the pressure control unit is moved by pressure along the longitudinal direction of the guide pin, and the planetary gear is only supported by rotation, wear or tear due to sliding friction between each internal gear and the planetary gear in the forward and backward directions and erroneous coupling between the gears. Since breakage does not occur substantially, durability is improved and malfunction can be prevented.

Fourth, the rotation angle is finely adjusted by the deceleration action between the planetary gear and the cam gear unit to precisely set the opening/closing position of the opening/closing means. Since the operating radius of the control handle is reduced when the opening and closing means are spaced by gear-coupled corresponding to the inner diameter of each internal gear to support the rotational torque, the operation convenience can be further improved.

1 is a perspective view showing a plastic house to which a conventional electric switchgear is applied.
2 is a perspective view showing an electric switch to which a limit device according to an embodiment of the present invention is applied.
Figure 3 is an exploded perspective view of a limit device for an electric switch according to an embodiment of the present invention.
Figure 4 is an exploded perspective view showing the main part of the limit device for an electric switch according to an embodiment of the present invention.
5 is a plan cross-sectional view of a limit device for an electric switch according to an embodiment of the present invention.
Figures 6a and 6b is a view showing the process of adjusting the limit limit of the limit device for the electric switch according to an embodiment of the present invention.

Hereinafter, a limit device for an electric switch according to a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

Figure 2 is a perspective view showing an electric switch to which a limit device according to an embodiment of the present invention is applied, Figure 3 is an exploded perspective view of the limit device for an electric switch according to an embodiment of the present invention, Figure 4 is one of the present invention An exploded perspective view showing the main part of a limit device for an electric switch according to an embodiment, Figure 5 is a plan sectional view of the limit device for an electric switch according to an embodiment of the present invention, Figures 6a and 6b are an embodiment of the present invention It is a view showing the process of adjusting the limit limit of the limit device for the electric switch according to the.

Here, the limit device 500 and the limit device 500 for an electric switch to be described below are preferably understood to have the same meaning. In addition, the forward or front side is preferably understood as the watertight cover 501 side to be described later, and the rear side or the rear side is preferably understood as the base 504 side to be described later.

Referring to FIG. 2 , the electric switch 100 transmits the rotational output generated by the motor 20 to the reduction gear unit 40 , and while decelerating in the reduction gear unit 40 , the torque is increased. It is provided to open and close the opening/closing means such as the length or shielding film of the plastic house in a winding manner by the driving output shaft 30 which is received and selectively rotated.

At this time, the rotational output of the motor 20 selectively driven according to the supply of power is decelerated through various gears in the device, and the driving output shaft 30 is selectively rotated while the torque is increased. Here, the driving through the reduction gear unit 40 is disclosed in prior art such as the registered utility model No. 20-0461874 and the registered patent No. 10-1818042 of the present applicant, and it is easy for those with general knowledge in the field Since it can be carried out in a simple manner, a more detailed description will be omitted.

On the other hand, the limit device 500 is provided in the electric switch 100 to set the opening and closing limit of the opening and closing means by limiting the rotational output of the motor (20).

3 to 4 , the limit device 500 includes a cam gear unit 550 , a fixed gear unit 560 , an interlocking carrier unit 540 , a planetary gear 530 , and a pressure control unit 510 . It is preferable to include At this time, the cam gear unit 550, the fixed gear unit 560, to control the forward/reverse driving limit of the motor 20 for winding the opening/closing means by the drive output shaft 30. It is preferable that the interlocking carrier unit 540, the planetary gear 530 and the pressure adjusting unit 510 are each provided as a pair and symmetrically left and right.

In detail, the components of the limit device 500 are mounted between the watertight cover (501 in FIG. 2 ) coupled to one side of the electric switch 100 and the base 504 .

The watertight cover (501 in FIG. 2) has an opening window symmetrically formed left and right, and a sealing cap (501a in FIG. 2) is detachably provided so that a scale plate 503 to be described later is exposed through the opening window. A scale plate through hole 503a through which the front end of the adjustment handle 511 to be described later protrudes is formed in the central portion of the scale plate 503, and the limit protrusion 553 to be described later along the outer periphery of the scale plate through hole 503a is formed. A scale for accurately identifying a circumferential position is formed radially. At this time, the scale plate 503 is preferably formed of a projection or semi-projection material so that the position of the limit protrusion 553 disposed on the rear side of the scale plate 503 is projected.

On the front surface of the base 504, a first coupling part 504a to which the fixed gear part 560 is rotatably supported is formed symmetrically left and right, and the rotation output of the drive output shaft 30 is transferred to the fixed gear part ( It is preferable that the second coupling portion 504b to which the connecting gear 570 to be transmitted to the 560 is coupled is formed. At this time, the second coupling part 504b is formed between the pair of first coupling parts 504a so that the connecting gear 570 is rotated while being engaged with the pair of fixed gear parts 560 symmetrically provided to the left and right. It is preferable to be formed at a predetermined position. In addition, a limit switch 50 to be described later is coupled to the upper end of the base 504 .

At this time, it is preferable that a sealing means such as a seal-ring is interposed between the watertight cover 501 and the base 504 to prevent the inflow of moisture such as rainwater into the limit device 500 . .

The cam gear unit 550 is symmetrically provided on the rear side of the scale plate 503 , and a first internal gear 554 is formed along the inner periphery of each cam gear unit 550 . In addition, it is preferable that the cam gear unit 550 has a ring shape in which the serration coupling unit 552 is formed along the rear edge of the opening hole 551 penetrating through the center portion.

In detail, on the rear surface of the cam gear unit 550 , a ring-shaped first alignment groove 555 in which one side portion 541 of the interlocking carrier unit 540 to be described later is rotatably supported is forwardly depressed. In addition, the first internal gear 554 is formed on the inner periphery of the side wall protruding backward from the outer rim of the cam gear unit 550, and on the outer periphery, a limit protrusion 553 for operating the limit switch 50 is provided in a radial direction. It is preferable to protrude outward. In addition, it is preferable that the serration coupling part 552 includes a protrusion protruding backward along the circumferential direction of the rear edge of the opening hole 551 .

The fixed gear part 560 is provided symmetrically left and right on the front side of the base 504 , and is rotatably coupled to the first coupling part 504a formed on the base 504 . The cam gear unit 550 is individually rotatably coupled to the front side of the fixed gear unit 560 . At this time, as the cam gear unit 550 is coupled to the front side of the fixed gear unit 560 , a mounting space may be formed therein.

In detail, the fixed gear unit 560 is formed in a disk shape, and it is preferable that a spur gear 562 geared with the reduction gear unit 40 is formed along the outer periphery. Here, the spur gear 562 is preferably gear-coupled with the connecting gear 570 connected to the reduction gear unit 40, and the fixed gear unit 560 provided as a pair on the left and right is the connecting gear 570 ) at the same time. Accordingly, when the pair of fixed gear units 560 receive rotation output, they may be rotated in the same forward or reverse direction.

On the front surface of the fixed gear unit 560 , a ring-shaped second alignment groove 564 in which the other side portion 542 of the interlocking carrier unit 540 is rotatably supported is formed by recessing backward. In addition, it is preferable that a first spring coupling portion 563 into which the rear end of the resilient means 513 to be described later is inserted is formed in the central portion of the fixed gear portion 560 , that is, the central portion of the second alignment groove 564 .

On the other hand, a second internal gear 561 is formed on the inner periphery of the side wall protruding forwardly outward of the second alignment groove 564 . At this time, the first internal gear 554 and the second internal gear 561 are composed of a potential gear having a difference in the number of teeth between each other, and the number of teeth of the first internal gear 554 is the second internal gear 561 . It is preferable to form in excess of the number of teeth. It is preferable that the number of teeth relationship between the first internal gear 554, the second internal gear 561, and the planetary gear 530 to be described later satisfies an integer ratio condition according to a general mechanical design method for deceleration. .

In this case, it is preferable that the cam gear unit 550 is rotationally supported by engaging the side wall edge protruding backward on the rear surface of the cam gear unit 550 in a ring shape with the side wall edge of the fixed gear unit 560 . In detail, each of the side wall edges of the cam gear unit 550 and the fixed gear unit 560 may be recessed stepwise in a radial direction inward and outward, so that the inside may be sealed in an engaged state. In addition, the cam gear unit 550 may be selectively driven/manipulated by being supported on the edge of the side wall of the fixed gear unit 560 .

The interlocking carrier part 540 is accommodated in a mounting space between the cam gear part 550 and the fixed gear part 560 . The interlocking carrier part 540 includes the one side part 541 and the other side part 542, and is preferably provided in a ring shape with a hollow central part.

In detail, the one side part 541 is disposed to face the rear surface of the cam gear part 550 , and may be preferably accommodated to be rotationally supported in the first alignment groove 555 . In addition, the other side portion 542 is disposed to face the front surface of the fixed gear portion 560 , and may preferably be accommodated in the second alignment groove 564 to be rotatably supported.

Here, it is preferable that a plurality of guide pins 543 are provided along the circumferential direction to support the space between the one side part 541 and the other side part 542 . The guide pin 543 is preferably provided in a cylindrical shape so that the planetary gear 530, which will be described later, is rotationally supported and rotated.

In addition, in the guide pin 543, the one side part 541 and the other side part 542 are rotatably accommodated in the first alignment groove 555 and the second alignment groove 564, respectively. It is desirable to extend to a length that supports a gap with (555,564) and a minimum play. Furthermore, it is preferable that the guide pins 543 are provided in an even number of at least 4 or more, and more preferably, 6 places are spaced at equal intervals along the circumferential direction of the one side part 541 and the other side part 542 . can be provided.

At this time, in the drawing, the guide pin 543 protrudes integrally from the front surface of the other side part 542, and a coupling hole is formed in which the front end of the guide pin 543 is coupled to the one side part 541. , which may be formed vice versa. Furthermore, the guide pin 543 may be provided as a separate pin member, and both ends may be formed to be coupled to the one side portion 541 and the other side portion 542 . That is, if the configuration in which the planetary gear 530 to be described later and the coupling extension 514 to be described later can be through-coupled to the guide pin 543 , it falls within the scope of the present invention.

The planetary gear 530 is rotatably coupled to the guide pin 543 , is assembled to the interlocking carrier part 540 , and is interposed between the cam gear part 550 and the fixed gear part 560 . That is, each of the planetary gears 530 is rotated by the guide pins 543 and is engaged with the first internal gear 554 and the second internal gear 561 by rolling motion and revolves. It is preferable that at least one or more of these planetary gears 530 are provided in each of the interlocking carrier parts 540, and more preferably, three or more planetary gears 530 are provided at equal intervals.

The pressure adjusting unit 510 is coaxially disposed inside the hollow of the interlocking carrier unit 540, and the opening hole 551 formed in the cam gear unit 550 by the control handle 511 protruding to the front. provided to pass through. In addition, it is preferable that a serration part 512 selectively coupled to the serration coupling part 552 along the circumferential direction is formed on the rear side of the pressure control part 510 . The serration portion 512 is preferably formed to include protrusions protruding forward to fit between the respective protrusions of the serration coupling portion 552 .

A second spring coupling part (515 of FIG. 6A ) into which the front end of the resilient means 513 is inserted is preferably formed on the rear surface of the pressure control part 510 . The resilient means 513 is provided as a coil spring, and is interposed between the first spring coupling part 563 and the second spring coupling part 515 ( FIG. 6A ). At this time, the pressure control unit 510 is supported by the elastic elastic force of the resilient means 513 to the front side. Through this, the serration coupling unit 552 and the serration unit 512 may be engaged and formed, and the cam gear unit 550 coupled to the pressure adjusting unit 510 and the serration may be rotated. .

On the other hand, the pressure control unit 510 is provided with a plurality of the coupling extension portions 514 that are coupled through the guide pin 543 and protrude at equal intervals outward in the radial direction so as to be moved along the longitudinal direction. desirable.

In detail, the coupling extension portion 514 preferably protrudes outside the outer periphery of the serration portion 512 , and a slide hole 514a through which the guide pin 543 passes is formed at each end thereof. That is, as the coupling extension portion 514 is coupled through the guide pin 543 and moves forward and backward along the longitudinal direction of the guide pin 543, the serration coupling portion 552 and the serration portion ( 512) may be engaged or spaced apart. Each of the coupling extension parts 514 extends to the same length, and through this, the adjustment handle 511 can be arranged coaxially with the centers of the fixed gear part 560 and the cam gear part 550 .

Here, it is preferable that the coupling extension 514 and the planetary gear 530 are coupled to the guide pin 543, and the coupling extension 514 and the planetary gear 530 are alternately arranged along the circumferential direction. do. Moreover, the guide pin 543 is provided at equal intervals at 6 places along the circumferential direction of the interlocking carrier unit 540, and the planetary gear 530 is provided at 3 places and the coupling extension unit 514. It is preferable that the serration portion 512 is formed to extend at equal intervals in three directions outward in the radial direction.

That is, the planetary gears 530 are coupled at equal intervals to be supported at three points by skipping the guide pins 543 one by one. In addition, the coupling extension portion 514 may be alternately disposed between the pair of planetary gears 530 to be coupled to the guide pin 543 .

As such, in the present invention, the pressure control unit 510 and the plurality of planetary gears 530 are provided as a carrier assembly C in which the interlocking carrier unit 540 is primarily assembled. Therefore, the interlocking carrier part 510 together with the carrier function for supporting the rotation of each of the planetary gears 530 and the carrier assembly (C) itself can function as a gear coaxially geared to each internal gear. . In addition, since the pressure control unit 510 and the plurality of planetary gears 530 are constrained to precise positions at precise intervals and accommodated in the mounting space, precision and manufacturing convenience can be significantly improved.

Here, the planetary gears 530 are arranged at equal intervals to be supported at three points by skipping the guide pins 543 one by one. 555 and the second alignment groove 564 are accommodated to be rotationally supported. At this time, the pressure control unit 510 is coupled to the central portion of the interlocking carrier unit 540 to move forward and backward, so that when the control handle 511 is pressed, only the pressure control unit 510 is in a retracted state and the rotational force is the It is equally transmitted to the planetary gear 530 through the interlocking carrier unit 540 . That is, even if each of the planetary gears 530 are spaced apart from each other in the radial direction of the adjustment handle 511 , an eccentric load is not directly applied when the adjustment handle 511 is pressed to each of the planetary gears 530 . Through this, it is possible to prevent in advance the problem of a decrease in the operation feeling or precision due to the gear coupling part being rotated stiffly.

Moreover, the position of the planetary gear 530 may be firmly fixed through the guide pins 543 fixed to the interlocking carrier part 540 at equal intervals. Accordingly, even if a plurality of the planetary gears 530 are provided, the positions of the planetary gears 530 may be precisely spaced apart and rotated.

In addition, when the control handle 511 is pressed, the serration coupling between the pressure control unit 510 and the cam gear unit 550 is released. It is transmitted to the planetary gear 530 through the interlocking carrier unit 540 . That is, the planetary gear 530 is coupled to the guide pin 543 and rolls according to the rotation of the interlocking carrier part 540 to revolve along the first internal gear 554 , while the guide pin 543 ). is rotated around Therefore, the driving reliability and operation precision can be remarkably improved through the accurate gear coupling between the respective gears and the uniform rotational force transmission.

In addition, when the control handle 511 is pressed, only the pressure control unit 510 is moved to the rear side, and the planetary gear 530 is only rotationally supported by the guide pin 543 . Accordingly, it is possible to prevent wear or damage in advance as the planetary gear moves in the front-rear direction while sliding friction with the first internal gear 554 or the second internal gear 561 . In addition, since the wear between the gears is minimized, the operation precision can be stably maintained when the limit device 500 is operated.

Through this, since the rotation angle is finely adjusted by the deceleration action between the planetary gear 530 and the cam gear unit 550, the opening/closing position of the opening/closing means can be accurately set. That is, if the opening and closing interval compared to the conventionally preset unit angle is 30 cm, the present invention can be precisely adjusted to 5 cm.

At the same time, as each of the planetary gears 530 is coupled at equal intervals to be rotationally supported by the interlocking carrier part 540, the carrier assembly C itself may be formed in a structure that supports rotational torque. That is, when the interval between the opening and closing means using the limit device 500 is set in response to the radius between the guide pins 543 from the center of the carrier assembly (C), the rotational operation interval of the control handle 511 can be increased. have. That is, if the number of revolutions is 30 when setting the interval in the prior art, the present invention can be reduced to 1/3 thereof. Through this, the operation convenience for the interval setting of the opening and closing means can be significantly improved.

On the other hand, the front-rear thickness (w1 of FIG. 6B ) of the serration part 512 is determined by the serration coupling part 552 in a state in which the cam gear part 550 is coupled to the front side of the fixed gear part 560 . It is preferable that the distance between the rear end of the fixed gear unit 560 and the front surface of the fixed gear unit 560 is less than (w2 in FIG. 6B ). That is, the interval between the rear end of the pressure control unit 510 and the front end of the serration unit 512 (w1 in FIG. 6B ) is the last end of the serration coupling unit 552 and the fixed gear unit 560 . It is preferable to form less than the gap between the front surfaces (w2 of FIG. 6B).

Therefore, when the pressure control unit 510 is supported by the elastic restoring force of the resilient means 513 to the front side, the serration unit 512 is fully engaged with the serration coupling unit 552, so that the rotational force is accurately transmitted. do. Then, when the control handle 511 is pressed to the rear side so that the rear surface of the pressure control unit 510 is in contact with the front surface of the fixed gear unit 560 , the serration unit 512 is connected to the serration coupling unit 552 . ) can be completely separated from Through this, the rotational output limit value of the motor 20 using the limit device 500 can be precisely corrected and set.

Moreover, the serration portion 512 and the serration coupling portion 552 are protruded in the front-rear direction to be formed in the form of a projection that engages with each other. Accordingly, when the pressure control unit 510 moves in the front-rear direction, wear due to friction between the serration unit 512 and the serration coupling unit 552 is prevented, so that durability and precision can be remarkably improved.

In addition, the planetary gear 530 is engaged with the first internal gear 554 and the second internal gear 561 at the same time in a state coupled to the guide pin 543, but the rotation trajectory of the outermost end is the It is preferable to be spaced apart from the outer periphery of the serration coupling part 552 . Through this, since each of the planetary gears 530 is prevented from interfering with each protrusion of the serration unit 512 and malfunctioning, driving reliability can be further improved.

On the other hand, the limit device 500 is operated through the following process.

In detail, referring to FIGS. 5 and 6A , the connecting gear 570 is provided to mesh with a pair of the fixed gears, and the connecting gear 570 is formed to have a diameter smaller than the diameter of the spur gear 562 and is mutually geared. are combined

In detail, the connecting gear 570 includes a second gear 572 and the second gear 572 that are gear-coupled to a gear formed on a braking drive shaft (not shown) connected to the drive output shaft (30 in FIG. 2) and The first gear 571 formed with a reduction ratio is integrally formed. At this time, as the first gear 571 is gear-coupled with the spur gear 562 , the rotation output of the motor ( 20 in FIG. 2 ) may be transmitted to the fixed gear unit 560 .

When the fixed gear unit 560 receiving the rotation output is rotated, the planetary gear 530 is rolled along the inner periphery of the fixed gear unit 560 . At this time, since the planetary gear 530 is coupled to the guide pin 543 , the interlocking carrier part 540 is concentric with the fixed gear part 560 through rolling movement of the planetary gear 530 . is revolving

In addition, since the coupling extension portion 514 is provided coupled to the guide pin 543 , the pressure adjustment portion 510 is also constrained by the interlocking carrier portion 540 to be concentric with the fixed gear portion 560 . is revolving Here, the pressure control unit 510 is elastically supported in the front side through the resilient means 513, so that the serration unit 512 and the serration coupling unit 552 are engaged and coupled. Through this, the cam gear unit 550 may be rotated by the rotational output transmitted through the driving output shaft 30 .

In this way, in a state in which the control handle 511 is elastically supported forward by the resilient means 513 , the serration portion 512 and the serration coupling portion 552 are engaged and coupled, so the control handle 511 . It becomes a self-locked state that cannot be rotated by the external force of this operator. In detail, each gear is engaged in the inside of the mounting space, and the control handle 511 is constrained to the interlocking carrier part 540 by the coupling extension part 514 . Accordingly, when the pressure control unit 510 and the cam gear unit 550 are serrated together, the control handle 511 is restrained without rotation even when an external force is applied.

That is, the rotational output of the motor 20 is transmitted through the spur gear 562 formed on the outer periphery of the fixed gear unit 560, and the rotational force of the fixed gear unit 560 is the planetary gear 530, It is transmitted to the control handle 511 through the coupling structure of the interlocking carrier part 540 and the coupling extension part 514 . At this time, as the serration part 512 provided on the rear side of the control handle 511 is coupled to the serration coupling part 552 , the cam gear part 550 is rotated. Here, when the limit protrusion 553 protruding to one side of the outer periphery of the cam gear part 550 presses the limit switch 50, the power supply to the motor 20 is cut off and is connected to open and close the length or opening/closing membrane The opening/closing limit is set by stopping the rotation of the opening/closing shaft.

Meanwhile, the first internal gear 554 and the second internal gear 561 are combined with a reduction gear ratio to form a special type of reduction device. That is, when the operator presses and rotates the control handle 511, the interlocking carrier unit 540 is rotated. In addition, the planetary gear 530 rotates around the guide pin 543 , and the cam gear unit 550 internally geared to the planetary gear 530 is reduced and rotated according to the reduction gear ratio. Through this, it is possible to finely adjust the circumferential position of the limit protrusion 553 formed on the outer periphery of the cam gear unit 550 to an accurate position.

On the other hand, the control process of the limit limit of the limit device 500 is as follows.

Referring to Figure 6b, when the control handle 511 is pressed to the rear side by the operator, the resilient means 513 interposed between the first spring coupling part 563 and the second spring coupling part 515 is As it is compressed, it retracts and the self-lock state is released. Through this, as the control handle 511 can be rotated by an external force, it is possible to adjust the opening/closing driving limit of the motor 20 .

In detail, when the control handle 511 pressed to the rear is rotated in the forward or reverse direction, the interlocking carrier unit 540 connected to the pressure control unit 510 through the coupling extension 514 is interlocked and rotated. . And, when the interlocking carrier part 540 is rotated around the control handle 511 , the planetary gear 530 is rotated about the guide pin 543 , and is inscribed on the inner periphery of the cam gear part 550 . The gears are engaged and the clouds move.

At this time, the planetary gear 530 has a front end gear-coupled to the first internal gear 554 and a rear end side gear-coupled to the second internal gear 561 , the first internal gear 554 and the According to the reduction gear ratio of the second internal gear 561 , the rotation is reduced by interlocking with the planetary gear 530 . Accordingly, the circumferential angle of the limit protrusion 553 formed on the outer periphery of the cam gui portion provided with the first internal gear 554 may be finely adjusted.

As such, the present invention is provided with a simple structure that is self-locking through the elastic support and serration coupling by the elastic means 513 provided with a spring. Therefore, when the operator presses and rotates the control handle 511 to finely set the driving limit of the motor 20 and then leaves the pressurized state, the control handle 511 is restrained and fixed at the set position, so the operation is performed Convenience can be significantly improved.

In this case, terms such as "include", "compose", "comprise" or "have" described above mean that the corresponding component may be inherent, unless otherwise stated. It should be construed as not excluding components, but may further include other components. All terms, including technical and scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which the present invention belongs, unless otherwise defined. Terms commonly used, such as those defined in the dictionary, should be interpreted as being consistent with the contextual meaning of the related art, and are not interpreted in an ideal or excessively formal meaning unless explicitly defined in the present invention.

As described above, the present invention is not limited to each of the above-described embodiments, and variations can be implemented by those of ordinary skill in the art to which the present invention pertains without departing from the scope of the claims of the present invention. and such modifications are within the scope of the present invention.

20: motor 30: drive output shaft
40: reduction gear 50: limit switch
500: limit device 510: pressure control unit
530: planetary gear 540: interlocking carrier unit
550: cam gear unit 560: fixed gear unit

Claims (5)

A cam gear part for operating a limit switch to selectively block the rotational output of the motor by rotating the first internal gear is formed along the inner periphery, the serration coupling part is formed along the rear edge of the opening hole formed in the central part;
The cam gear part is individually rotatably coupled to the front side so that a mounting space is formed therein, and a spur gear gear-coupled to the reduction gear part which is connected to the motor along the outer periphery to generate rotational output is formed, and a second internal gear is formed on the inner periphery a fixed gear unit in which is formed;
The central portion is provided in a hollow ring shape, and a plurality of guide pins are provided along the circumferential direction to space apart and support between one side portion disposed to face the rear surface of the cam gear portion and the other side portion disposed to face the front surface of the fixed gear portion. carrier unit;
a planetary gear rotatably coupled to the guide pin to be rotated in engagement with the first internal gear and the second internal gear, at least one planetary gear being provided in plurality; and
Doedoe coupled to the inside of the interlocking carrier part to move between the one side part and the other side part, a control handle rotated to set the rotational output limit value of the motor protrudes forward so as to pass through the opening hole and the circumferential direction A serration portion selectively coupled to the serration coupling portion is formed and includes a pressure adjusting portion that is elastically supported to the front side through an elastic means provided on the rear side,
A plurality of coupling extensions that are coupled through the guide pin and move along the longitudinal direction in the pressure control unit are spaced apart at equal intervals to the outside in the radial direction of the rear end so that the pressure control unit is coaxially disposed inside the hollow of the interlocking carrier unit. A limit device for electric switchgear, characterized in that it becomes delete The method of claim 1,
The guide pins are provided at equal intervals in 6 places along the circumferential direction of the interlocking carrier part,
The planetary gears are provided in three places and are coupled at equal intervals so that the guide pins are skipped one by one and supported at three points, and the coupling extensions extend at equal intervals to the rear end of the pressure control unit at three places at equal intervals between the pair of planetary gears. A limit device for an electric switch, characterized in that it is alternately arranged in the coupled to the guide pin. The method of claim 1,
The coupling extension part protrudes outside the outer periphery of the serration part,
In a state in which the pressure control unit is pressed to the rear, the thickness in the front and rear direction of the serration part is formed to be less than the interval between the rear end of the serration coupling part and the front surface of the fixed gear part so that the serration part and the serration coupling part are spaced apart. limit device for electric switchgear. The method of claim 1,
The planetary gear is engaged with the first internal gear and the second internal gear at the same time in a state coupled to the guide pin, and the rotational trajectory of the outermost end is formed to be spaced apart from the outer periphery of the serration coupling part. Limit device for switchgear.

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