KR102564954B1 - Forward-reverse converter device for a net hauler motor - Google Patents

Abstract

A forward/reverse converter for a lift motor is disclosed. A forward/reverse converter for an elevator motor according to one aspect of the present invention includes a casing forming an accommodation space open to one side therein; a plurality of contacts fixed to the casing inside the accommodation space; a rotation unit disposed adjacent to the plurality of contacts and rotatably coupled to the casing to rotate about a virtual rotation axis; a connecting portion provided on an outer surface of the rotating portion and allowing current to flow; and a shaft coupled to the rotation unit and extending along an axial direction of the rotation shaft, wherein at least one of the contacts contacting the connection unit when the rotation unit is disposed at a first rotation angle is the second rotation unit of the rotation unit. It may be configured to be different from the contact that makes contact with the connecting portion when disposed at an angle. According to one embodiment of the present invention, the forward and reverse conversion device for a lift motor can have a high waterproof performance and can not malfunction even if moisture permeates.

Description

Forward and reverse converter for lift motor {FORWARD-REVERSE CONVERTER DEVICE FOR A NET HAULER MOTOR}

The present invention relates to a forward-reverse converter, and more specifically, to a forward-reverse converter for a motor of a lift such as a fishing boat.

The fishing industry is related to the work of netting and hoisting fishing gear, drift nets, ropes, etc., and for this purpose, ships such as fishing boats are equipped with lifts and are used. A power elevator commonly used in recent years rotates a drum having a predetermined diameter using the power of a motor, and winds up a tension member that requires lifting, such as a rope or fishing net, on the drum. Since the tensioning member wound on the drum will later have to be rethrown, it may be advantageous to have the lifter operate both in forward and reverse directions.

Korean Patent Registration No. 10-0266296, German Patent Registration No. 1921132, etc. disclose a device for controlling forward and reverse rotation of a motor. However, for devices used on small and medium-sized vessels, such as elevators, some precautions must be taken into account, for example, the device must be robust against the marine environment. Since lift equipment is used in small and medium-sized ships, there is always a risk of contact with water due to waves, etc., and is basically always in an environment with high humidity. Therefore, it is desirable to make a device such as a lift have a high waterproof performance, and at the same time have a structure in which components, especially components constituting an electric circuit, can operate properly even when moisture penetrates the inside of the device.

In addition, Yang Seung-gi must not react sensitively to unintended manipulation. Strong winds and strong waves frequently occur on fishing boats where lifters are used, and since numerous people and objects move in a small space, careless contact may occur. Loss of work can be enormous if the motor of an elevator is accidentally reversed while running forward, for example. A method of providing a locking device to the lever of the forward/reverse converter to set it to a specific operating mode and then fixing it with a locking device may be considered, but this requires additional user action, making it cumbersome to use, and misoperation caused by the user's negligence. possibility exists.

On the other hand, as mentioned above, in order to increase the waterproof performance, it may be advantageous that the part operated by the user is based on a rotational motion, because it is easier to adhere the sealing member or the like in a circular shape than in an angular shape. However, in the case of using a rotational motion, it may be difficult to prevent sensitive response to unintended manipulation.

Republic of Korea Patent No. 10-0266296 German Registered Patent No. 1921132

Therefore, the present invention has been derived to solve the above problems, and one aspect of the present invention is to provide a forward and reverse converter for a lift motor that is robust against moisture penetration and can provide high durability.

Another aspect of the present invention is to provide a forward and reverse converter for a lift motor that does not react sensitively to unintended manipulation while maintaining high waterproof performance.

Other objects of the present invention will become clearer through the examples described below.

A forward/reverse converter for an elevator motor according to one aspect of the present invention includes a casing forming an accommodation space open to one side therein; a plurality of contacts fixed to the casing inside the accommodation space; a rotation unit disposed adjacent to the plurality of contacts and rotatably coupled to the casing to rotate about a virtual rotation axis extending along the axial direction; a connecting portion provided on an outer surface of the rotating portion and allowing current to flow; and a shaft coupled to the rotation unit and extending along the axial direction, wherein when the rotation unit is disposed at a first rotation angle, at least one of contacts contacting the connection unit rotates the rotation unit at a second rotation angle. It may be configured to be different from the contact that contacts the connecting portion when placed.

The forward/reverse converter for lift motors according to the present invention may include one or more of the following embodiments. For example, a pair of elastic pressing members disposed to contact both sides of the shaft and formed of a material capable of elastic deformation; and a spring configured to pull the pair of elastic pressing members in the direction of the shaft, wherein the elastic pressing member rotates at a specific rotation angle including the first rotation angle and the second rotation angle. The shaft may be pressed so that the portion rotates. As an example, such an effect can be obtained when the shaft has a rectangular cross section. As another example, the same effect can be obtained even when the shaft has an elliptical cross section.

The shaft may be formed at an end of a lever base extending from the outside to the inside of the casing through a through hole formed in a sidewall of the casing. In this case, the forward/reverse converter for the elevator motor may further include a sealing member disposed around the through hole, the through hole may have a circular shape, and a portion of the lever base located in the through hole may be circular. It may have a cross section, and the sealing member may be mounted to prevent the inflow of moisture by adhering to the casing and the lever base.

The rotational portion includes a first surface at a first distance from the rotational axis, the first distance may have a value greater than or equal to a distance from the rotational axis to the contact, wherein the rotational portion corresponds to the first rotational angle or the second rotational angle. When disposed at an angle, a portion of the connection portion provided on the first surface may contact one or more of the plurality of contacts. The rotation unit may further include a second surface at a second distance from the rotation axis, and the second distance may have a value smaller than the first distance and less than a distance from the rotation axis to the contact. The rotation unit may further include a third surface at the first distance from the rotation axis, the second surface may extend between the first surface and the third surface, and the connection unit may include the first surface. It may be formed in different positions on the first surface and the third surface, or in different sizes, or in different positions and sizes.

The rotation unit may include a non-conductive disc having a circular shape and made of a non-conductive material. The center of the non-conductive disc may be located on the rotation axis, the radius of the non-conductive disc may be greater than a maximum distance from the rotation axis to the connection part, and the non-conductive disc may be located at a position spaced apart from the plurality of contacts. can be formed In this case, a portion of the connection portion may be coupled through a through hole formed in the non-conductive disc.

According to the problem solving means of the present invention as described above, various effects including the following can be expected. However, the present invention is not established when all of the following effects are exerted.

According to one embodiment of the present invention, the forward and reverse conversion device for a lift motor can have a high waterproof performance and can not malfunction even if moisture permeates.

In addition, according to one embodiment of the present invention, the operating mode is changed only when the lever is rotated at a predetermined angle by applying a predetermined amount or more of force while allowing the user to conveniently control the forward and reverse conversion device for the elevator motor with one operation By doing so, it is possible to prevent the forward/reverse conversion device for the lift motor from reacting sensitively to an unintended operation.

1 is a perspective view illustrating an elevator according to a first embodiment of the present invention.
2 is an exploded perspective view illustrating the exterior of a forward-reverse converter for a lift motor according to a first embodiment of the present invention.
3 is a bottom view illustrating the inside of a forward/reverse converter for a lift motor according to a first embodiment of the present invention.
4 is a conceptual diagram illustrating the arrangement of a rotating part and a connecting part applicable to a forward/reverse converter for a lift motor according to a first embodiment of the present invention.
5 is a conceptual diagram illustrating the operation of a forward-reverse converter for a lift motor according to a first embodiment of the present invention.
6 is a conceptual diagram illustrating the arrangement of a rotating part and a connection part applicable to a forward/reverse converter for a lift motor according to a second embodiment of the present invention.
7 is a conceptual diagram illustrating the operation of a forward-reverse converter for a lift motor according to a second embodiment of the present invention.
8 is a front view illustrating the operation of a shaft and an elastic pressure member of a forward/reverse converter for a lift motor according to a first embodiment of the present invention.
9 is a front view illustrating the operation of a shaft and an elastic pressure member of a forward/reverse converter for an elevator motor according to a third embodiment of the present invention.

Since the present invention can apply various transformations and have various embodiments, specific embodiments will be illustrated in the drawings and described in detail in the detailed description. However, it should be understood that this is not intended to limit the present invention to specific embodiments, and includes all transformations, equivalents, and substitutes included in the spirit and scope of the present invention. In describing the present invention, if it is determined that a detailed description of related known technologies may obscure the gist of the present invention, the detailed description will be omitted.

Terms used in this application are only used to describe specific embodiments, and are not intended to limit the present invention. Singular expressions include plural expressions unless the context clearly dictates otherwise. In this application, the terms "include" or "have" are intended to designate that there is a feature, number, step, operation, component, part, or combination thereof described in the specification, but one or more other features It should be understood that the presence or addition of numbers, steps, operations, components, parts, or combinations thereof is not precluded.

Terms such as first and second may be used to describe various components, but the components should not be limited by the terms. These terms are only used for the purpose of distinguishing one component from another.

Hereinafter, embodiments according to the present invention will be described in detail with reference to the accompanying drawings. description is omitted.

1 is a perspective view illustrating an elevator 10 according to a first embodiment of the present invention. Referring to FIG. 1 , the elevator 10 according to the first embodiment of the present invention can raise or lower a heavy object to a higher place by winding a rope or a fishing net (not shown) around the drum unit 203 .

The drum unit 203 may be formed in a cylindrical shape having a winding groove (not shown) in which a rope or fishing net is wound. The drum unit 203 is rotated by a driving force transmitted from a motor 201 connected to one side, and a rope or fishing net is wound or unwound around the outer circumferential surface of the drum unit 203 to raise or lower a heavy object.

The plurality of pulleys 101 and 102 disposed adjacent to the drum unit 203 may change the direction of the rope or fishing net to be wound. A separation preventing member 103 may be provided on the outer side of any one of the plurality of pulleys 101 and 102 (101 or 102).

The gear part 202 is located between the drum part 203 and the motor 201, and can selectively change the driving force of the motor 201 through a plurality of gears built in the housing. The user may adjust the shifting level by rotating a handle installed outside the gear unit 202 .

A forward/reverse converter 200 may be mounted on one side of the motor 201 . The forward/reverse converter 200 is connected to the circuit of the motor 201 through an open portion and serves to change the rotation direction of the motor to one of forward and reverse directions. Hereinafter, a forward/reverse converter 200 for a lift motor according to some embodiments of the present invention will be described in more detail.

2 is an exploded perspective view illustrating the exterior of a forward/reverse converter 200 for a lift motor according to the first embodiment of the present invention, and FIG. 3 is a forward/reverse converter 200 for a lift motor according to the first embodiment of the present invention. ) is a bottom view illustrating the interior of the

Referring first to FIG. 2 , the forward/reverse converter 200 may include a casing 210 accommodating other components therein, and a lever 350 may be inserted into a through hole 250 formed in a sidewall of the casing 210. can be combined.

The through hole 250 may be formed in a circular shape, and a portion of the lever base 340 positioned inside the through hole 250 of the lever 350 may have a circular cross section having a size corresponding to the through hole 250. there is. However, a shaft 330 inserted into the casing 210 and coupled to a rotating part 300 (see FIG. 3) described later may be formed in the lever base 340 in the axial direction. can have a shape.

The lever 350 may include a shaft 330 extending axially from the lever base 340 and a lever handle 380 extending in the other direction from the lever base 340 . In this specification, the axial direction refers to a direction in which an imaginary axis of rotation constituting the center of rotation of the rotation unit 300 (see FIG. 3) to be described later extends. The lever handle 380 may form a part that a user grips to operate the forward/reverse converter 200 .

When the lever 350 is mounted, a sealing member 280 may be disposed between the casing 210 and the lever 350 . The sealing member 280 is disposed around the through hole 250 and adheres closely to the casing 210 and the lever base 340 to prevent moisture from entering. A boss 230 protruding with a predetermined length around the through hole 250 may be formed in the casing 210 . The boss 230 may form a space corresponding to the size of the sealing member 280 so that the sealing member 280 presses and adheres to a large area. Oil may be injected between the boss 230 and the sealing member 280 to enhance waterproof performance and lubrication performance for rotation of the lever 350 .

As will be described later in detail, it may be advantageous for the shaft 330 coupled to the rotation unit 300 to have a cross section other than circular. As the shaft 330 has a cross section other than circular, it is possible to prevent the forward/reverse converter 200 from sensitively reacting to erroneous operation using a very simple structure. The through-hole 250 formed on the sidewall of the casing 210 is formed larger than the cross-sectional area of the shaft 330, and the lever base 340 having a size corresponding to the through-hole 250 is positioned in the through-hole 250, thereby providing waterproof performance of the casing 210. It is possible to apply the simple structure described above without sacrificing.

In the casing 210, a flange 215 may be formed around one open side (the lower surface in FIG. 2), and a coupling hole 217 for coupling with the motor 201 may be formed in the flange 215. The forward and reverse converter 200 for an elevator motor according to an embodiment of the present invention is designed to be mounted on the upper surface of the motor 201 as shown in FIG. 1, so that one open side of the casing 210 may correspond to the lower surface, The forward/reverse converter 200 may be mounted on the lower surface or side of the motor 201, and the direction of the open surface may vary depending on the arrangement of the forward/reverse converter 200. Although not shown, it is obvious that a sealing member such as a gasket may be added between the casing 210 and the motor 201 .

Referring to FIG. 3 , the accommodating space 220 formed inside the casing 210 may include a rotating part 300 , a shaft 300 , a connecting part 400 , and a plurality of contacts 440 .

The contacts 440 may be fixed to the inner surface of the casing 210 and are connected to the electric circuit of the motor 201 when the forward/reverse converter 200 is mounted. In a state in which the contacts 440 are connected to the circuit of the motor 201, the connection part 400 on the rotating part 300 electrically connects some of the contacts 440 to each other to complete the circuit of the motor 201.

The plurality of contacts 440 may be disposed adjacent to the rotation unit 300 . In the example shown in FIG. 3 , the contacts 440 are disposed on both sides of the rotator 300 , but in another embodiment not shown, the contacts 440 may be disposed on only one side of the rotator 300, and the rotator 300 ) may be disposed at a position corresponding to three or more sides of the

In order for the contact 440 to make good electrical contact with the connection part 400 on the rotating part 300, the contact 440 extends from the part fixed to the casing 210 and the fixed part within a specific range of distance. It may include an elastically moving part.

The rotating part 300 may be disposed adjacent to the plurality of contacts 440 and may be rotatably coupled to the casing 210 . One end of the rotating part 300 may be rotatably coupled to the coupling part 260 formed inside the casing 210 , and the other end may be coupled to the shaft 330 .

The connection part 400 is provided on the outer surface of the rotating part 300 and may be formed of a conductor. For example, the connection part 400 may be formed of a flat plate of a specific shape made of a conductive material such as copper, and may be coupled by bending and/or bending along an outer surface of the rotating part 300 . When the rotation unit 300 is disposed at a specific rotation angle, the connection unit 400 on the outer surface of the rotation unit 300 may contact some of the plurality of contacts 440 . Depending on the size, shape, and arrangement of the connecting portion 400, the contact 440 that the connecting portion 400 contacts when the rotating portion 300 is disposed at a specific rotation angle may be different.

As described above, when the rotation unit 300 is disposed at a specific rotation angle, the contact 440 to which the connection unit 400 contacts may be different. That is, the rotating part 300 can be rotated according to the manipulation applied by the user to the lever 350, and accordingly, the contact 440 to which the connecting part 400 contacts can be changed, and as a result, the circuit of the motor 201 Configuration may change. In this way, as the circuit configuration of the motor 201 is changed by contacting different contacts 440 with the connector 400, the operating mode of the motor 201 can be controlled between forward and reverse operation. This is applicable both when the motor 201 uses alternating current (AC) and when using direct current (DC).

Meanwhile, the rotation unit 300 may include a non-conductive disk 390 . The non-conductive disc 390 may be a non-conductor, that is, a circular disc made of a non-conductive material. In FIG. 3 , four non-conductive discs 390 are arranged at equal intervals on the rotating part 300, and only side edges of each non-conductive disc 390 are depicted. Of course, the number, spacing, and location of the non-conductive discs 390 may vary according to embodiments.

The non-conductive disk 390 may have a circular shape centered on the axis of rotation of the rotation unit 300 and may have a radius greater than that of the rest of the rotation unit 300 . The radius of the non-conductive disk 390 may be greater than the maximum distance from the rotation axis of the rotation unit 300 to the connection unit 400 . That is, the edge of the non-conductive disc 390 may extend to a position beyond the connection part 400 based on the rotation axis. Therefore, if necessary, a through hole is formed in the non-conductive disk 390 and a portion of the connection portion 400 may pass through the through hole. In the example depicted in FIG. 3 , the connection part 400 includes a first connection part 410 having a “b” shape and a second connection part 420 having a “b” shape (see FIG. 4 ), and the first connection part ( 410) and the vertical portions of the second connection portion 420 penetrate through the non-conductive disk 390 and are coupled to the rotating portion 300, respectively. Since a through hole is not formed in the non-conductive disk 390 located between the first connection part 410 and the second connection part 420, an unintended electrical connection is made between the first connection part 410 and the second connection part 420. don't lose

Since the non-conductive disc 390 has the largest diameter in the rotating part 300, the non-conductive disc 390 may serve to physically protect the connection part 400 provided on the outer surface of the rotating part 300. For example, even if an external object accidentally enters the inner space 220 of the casing 210, the object collides with the non-conductive disk 390 instead of the connecting portion 400 so that the connecting portion 400 can be physically protected. there is.

When moisture penetrates or condenses in the inner space 220 of the casing 210, the moisture that touches the rotating part 300 or the connection part 400 moves along the surface of the rotating part 300 due to surface tension. move to the lowest position of At this time, since the non-conductive disk 390 part of the rotating part 300 has the largest diameter, regardless of whether the forward/reverse converter 200 is mounted on any of the upper, lower and side surfaces of the elevator motor 201, the rotating part 300 The lowest position of may be the edge of the non-conductive disc 390, so that moisture applied to the rotating part 300 may move to the lower edge of the non-conductive disc 390 along the surface of the rotating part 300. . The non-conductive disc 390 may be formed at a position spaced apart from the contact 440, so that water droplets falling by gravity from the lower edge of the non-conductive disc 390 fall away from the contact 440 and the wire connected thereto. can do.

As the number of non-conductive disks 390 increases and the spacing between them increases, the function of the non-conductive disks 390 to protect the connector 400 from physical impact and moisture can be further strengthened. If necessary, the connection part included in the connection part 400 may be disposed passing through the plurality of non-conductive disks 390 .

Even if a small amount of moisture is added or condensed to the connection part 400, there is no major obstacle to operation unless the moisture forms an unwanted short circuit between the connection part 400 and other conductive members, and the non-conductive disk 390 of the rotating part 300 Since moisture can be removed, a structure that is considerably robust against moisture penetration can be implemented.

A rotation guide 290 may be formed inside the casing 210 at a position corresponding to the non-conductive disk 390 . In the rotation guide 290, a circular arc corresponding to the circular cross section of the non-conductive disc 390 may be formed in the form of an engraved groove, and the non-conductive disc 390 may be disposed inside the circular intaglio arc. The rotation guide 290 may be implemented to contact the non-conductive disk 390, or may prevent contact from occurring by placing a slight gap therebetween. The rotation guide 290 is formed at a position corresponding to the non-conductive disk 390 and may be provided at a position spaced apart from the contact 440 , respectively.

The rotation guide 290 may designate a position of the non-conductive disc 390 and may guide rotation of the rotation unit 300 . When moisture flows along the non-conductive disk 390, the moisture can be naturally moved from the lower edge of the non-conductive disk 390 to the rotation guide 290 and removed, and conversely, when moisture forms on a part of the casing 210 After being moved toward the rotation guide 290 by this surface tension, it may move naturally to the non-conductive disc 390 and be removed from the lower edge of the non-conductive disc 390.

The shaft 330 may extend along the axial direction, and one end thereof may be coupled to the rotation unit 300 and the other end may be connected to the lever base 340 . At least one washer 251 and a sealing member 252 may be disposed at a portion of the shaft 330 or the lever base 340 located in the inner space 220 of the casing 210 . In some embodiments of the present invention, the cross section of shaft 330 may have a shape other than circular.

A pair of elastic pressure members 360 and a spring 370 coupled thereto may be provided in the inner space 220 of the casing 210 . The elastic pressing member 360 may be disposed to contact both sides of the shaft 330, respectively, and may be formed of a material capable of being elastically deformed. The spring 370 may be configured to pull the elastic pressing member 360 in the direction of the shaft 330 . The elastic pressing member 360 and the spring 370 may be configured to press the shaft 330 so that the rotation unit 300 rotates at a specific rotation angle.

A specific example of this is presented in FIG. 8 . 8 is a front view illustrating the operation of the shaft 330 and the elastic pressing member 360 in the forward/reverse converter 200 for a lift motor according to the first embodiment of the present invention. 8, the lever base 340 and the lever handle 380 located outside the casing 210 are represented by dotted lines.

Referring to FIG. 8 , the shaft 330 of the forward/reverse converter 200 for a lift motor according to the first embodiment of the present invention may have a rectangular cross section. The pair of elastic pressing members 360 may be formed of a material capable of slight elastic deformation, such as metal having a predetermined thickness, and may be disposed on both sides of the shaft 330 having a rectangular cross section.

The pair of elastic pressing members 360 may have one end (lower end in the drawing) fixed to the casing 210 while holding the shaft 330 therebetween. A spring 370 may be coupled to the other end (top in the drawing) of the elastic pressing member 360, and the spring 370 may pull each elastic pressing member 360 in the direction of the shaft 330, that is, inward. there is. 8, the upper end of the elastic pressing member 360 is bent outward in consideration of the size of the spring 370, but the shape of the elastic pressing member 360 depends on the thickness of the shaft 330 and the length of the spring 370. It can vary.

Assuming that the position of the lever handle 380 depicted in (a) of FIG. 8 is a forward operation mode, and assuming that the corresponding rotation angle of the shaft 330 and the rotating part 300 is 0 degrees, the rotation angle is 0 degrees. When the rectangular shape of the cross section of the shaft 330 has its side parallel to the extending direction of the elastic pressing member 360 and the direction in which the spring 370 applies force, the distance between the elastic pressing members 360 is the minimum value within the possible limit have In this state, the spring 370 may be configured not to apply force to the elastic pressing member 360, and even if the spring 370 applies force to the elastic pressing member 360, the shaft 330 is in the most stable position. There is no room to turn.

Similarly, as shown in (c) and (e) of FIG. 8, even when the rotational angles of the shaft 330 and the rotating part 300 are 90 degrees and 180 degrees, the shaft 330 is in the most stable position, so the spring 370 elastically presses it. Even if force is applied to the member 360, the shaft 330 has no room to rotate. In one embodiment of the present invention, each of the forward operating mode and the reverse operating mode of the forward and reverse converter 200 for an elevator motor may be configured to correspond to one of the angles that allow the shaft 330 to be in the most stable position as described above. can

When the user rotates the lever handle 380 in the state of FIG. 8 (a), the rotational angles of the shaft 330 and the rotation unit 300 will increase. In (b) of FIG. 8, a case where the rotation angles of the shaft 330 and the rotation unit 300 are located between 0 degrees and 90 degrees is shown. Here, the distance between the elastic pressing members 360 does not have a minimum value in the direction in which the spring 370 applies the force, and the force of the spring 370 is applied to the shaft 330 through the elastic pressing member 360. When the rotation angle is greater than 0 degrees and less than 45 degrees, the left elastic pressing member 360 presses the upper part of the shaft 330 and the right elastic pressing member 360 presses the lower part of the shaft 330 to rotate the shaft 310. A force for rotating the shaft 330 clockwise will be applied, and when the rotation angle is greater than 45 degrees and less than 90 degrees, the left elastic pressing member 360 presses the lower portion of the shaft 330 and the right elastic pressing member 360 ) will press the upper part of the shaft 330 to rotate the shaft 330 counterclockwise with respect to the rotation axis 310 will be applied.

In other words, when the user rotates the lever handle 380, the lever handle 380 can be moved only when a force greater than the force applied by the spring 370 is applied, and the lever handle 380 has an angle of less than about 45 degrees. In the case of rotation only, it means that the elastic pressing member 360 and the spring 370 will return the lever handle 380 to the rotation angle of 0 degrees again. The user has to rotate the lever handle 380 at an angle greater than 45 degrees with a force greater than the force applied by the spring 370, and in this case, the elastic pressing member 360 and the spring 370 guide the lever handle 380. It can be moved through the rotation angle of 90 degrees described in (c) of 8.

In (d) of FIG. 8 , a case where the rotational angles of the shaft 330 and the rotating part 300 are located between 90 degrees and 180 degrees is shown. Similarly here, the distance between the elastic pressing members 360 in the direction in which the spring 370 applies the force does not have a minimum value, and the force of the spring 370 is applied to the shaft 330 through the elastic pressing member 360 will be. When the rotation angle exceeds 90 degrees and is less than 135 degrees, the left elastic pressing member 360 presses the upper part of the shaft 330 and the right elastic pressing member 360 presses the lower part of the shaft 330 to move the shaft 330. A clockwise rotational force will be applied, and when the rotation angle exceeds 135 degrees and is less than 180 degrees, the left elastic pressing member 360 presses the lower portion of the shaft 330 and the right elastic pressing member 360 rotates the shaft 330 A force will be applied to rotate the shaft 330 in a counterclockwise direction by pressing the top of the . When the lever handle 380 is rotated only at an angle of less than about 135 degrees, the elastic pressing member 360 and the spring 370 will return the lever handle 380 to the rotation angle of 90 degrees, and the user can use the spring 370 ), the lever handle 380 must be rotated at an angle greater than 135 degrees with a force greater than the force applied by the lever handle 380 to move the lever handle 380 to the rotation angle of 180 degrees depicted in (e) of FIG.

Although FIG. 8 depicts a case where the shaft 330 has a square cross section, the cross section of the shaft 330 may be a rectangular shape other than a square, or even a polygonal shape other than a square. When the cross section of the shaft 330 is a polygon other than a square, the elastic pressing member 360 may be formed in a shape corresponding to the cross section of the shaft 330 .

Referring back to FIG. 3 , when the cross section of the shaft 330 is not circular, it may be difficult to increase the waterproof performance between the shaft 330 and the casing 210 , but the lever base 340 having a circular cross section is the casing 210 ) and by allowing the shaft 330 to extend from the lever base 340, it is possible to provide a watertight coupling between the lever base 340 and the case 210.

As shown in FIG. 3 , the washer 251 and the sealing member 252 may be disposed between the elastic pressing member 360 and the sidewall of the casing 210 . Of course, washers may also be provided at other locations, such as between the elastic pressing member 360 and the rotating unit 300 or between the rotating unit 300 and the coupling unit 260, if necessary.

Hereinafter, with reference to FIGS. 4 and 5 , an embodiment in which the contact 400 with which the connection part 400 comes into contact varies according to the rotation angle of the rotating part 300 will be described.

4 is a conceptual diagram illustrating the arrangement of a rotation unit 300 and a connection unit 400 applicable to a forward and reverse converter 200 for a lift motor according to a first embodiment of the present invention, and FIG. 5 is a first embodiment of the present invention. It is a conceptual diagram illustrating the operation of the forward and reverse converter 200 for a lift motor according to the example. In order to help a clear understanding of the invention, only the rotation part 300 and the connection part 400 are conceptually represented in FIG. 4, and the casing 210, the rotation guide 290 and some non-conductive discs 390 are omitted in FIG. 5.

Referring to FIG. 4 , the rotating part 300 can be seen as having first to fourth surfaces 301 to 304 along its outer circumferential surface. In the example depicted in FIG. 4 , the connecting portion 400 includes a first connecting portion 410 and a second connecting portion 420, and the first to third surfaces 301 to 301 of the rotating portion 300 of the first connecting portion 410. 303) will be denoted by reference numerals 411 to 413, respectively, and the portion provided on the fourth surface 304 of the rotating part 300 is the first surface 301 and the third surface 302. Depending on which part it is adjacent to, it will be marked as 414-1 and 414-3. In addition, the parts provided on the first to third surfaces 301 to 303 of the rotating part 300 among the second connecting parts 420 will be denoted by reference numerals 421 to 423, respectively, and the fourth part of the rotating part 300 The portions provided on the surface 304 will be denoted as 424-1 and 424-3 depending on which portion of the first surface 301 and the third surface 302 is adjacent. Of course, this distinction is for convenience of description and is not intended to limit the invention.

The first distance from the rotating shaft to the first surface 301 of the rotating part 300 may be greater than or equal to the distance from the rotating shaft to the contact 440 . That is, when the rotating part 300 is arranged at a specific rotation angle so that the first surface 301 faces the contact 440, some of the parts 411 and 421 formed on the first surface 301 of the connecting part 400 are contact It becomes possible to contact 440. The reason why it is expressed that the first distance may be greater than or equal to the distance from the rotation axis to the contact 440 is that the contact 440 is generally configured to include a portion that is elastically deformable within a specific range.

Similarly, the distance from the rotation axis to the third surface 303 of the rotation part 300 may be greater than the distance from the rotation axis to the contact 440, and when the third surface 303 faces the contact 440, the connection part ( Some of the portions 413 and 423 formed on the third surface 303 of 400 can contact the contact 440 . The distance from the axis of rotation to the third surface 303 may be the same as the distance to the first surface 301 (ie, may be the first distance), but the present invention is not limited thereto.

On the other hand, the second surface 302 located between the first surface 301 and the third surface 303 is formed closer to the rotation axis, so that the second surface 302 of the rotation part 300 extends from the rotation axis to the second surface 302. The distance may be smaller than the distance from the rotation axis to the contact 440 and may be smaller than the first distance. That is, when the rotating part 300 is disposed at a specific rotation angle so that the second surface 302 faces the contact 440, the parts 412 and 422 formed on the second surface 302 of the connecting part 400 form the contact 440. ) can be configured so that it does not come into contact with Of course, the portions 412 and 422 formed on the second surface 302 of the connection portion 400 are respectively formed on the first surface 302 and the portions 411 and 421 formed on the third surface 303, respectively. 423) can be electrically connected.

The fourth surface 304 located between the first surface 301 and the third surface 303 may also have a distance from the axis of rotation smaller than the distance from the axis of rotation to the contact 440 and may be smaller than the first distance. . That is, when the fourth surface 304 faces the contact 440, the portions 414-1, 414-3, 424-1, and 424-3 formed on the fourth surface 304 of the connection portion 400 form the contact ( 440) may be configured to prevent contact. Strictly speaking in the context of operation, the parts 414-1, 414-3, 424-1, 424-3 formed on the fourth surface 304 of the contact portion 400 are not necessarily, but these parts are the parts of the contact portion 400. The portions 411 , 413 , 421 , and 423 formed on the first and third surfaces 301 and 303 may help fully contact the contact 440 and help prevent separation from the rotating part 300 . . The distance from the axis of rotation to the fourth surface 304 may be the same as the distance to the second surface 302 (ie, may be the second distance), but the present invention is not limited thereto.

In the example depicted in FIG. 3 , the first connecting portion 410 is formed in an “L” shape and the second connecting portion 420 is formed in a “B” shape, so that the first to fourth surfaces 301 of the rotation unit 300 are formed. ~304) are bent and bent along. This configuration allows the first connection part 410 and the second connection part 420 to be formed in different sizes on the first surface 301 and the third surface 303, respectively, and the connection part 400 as a whole is formed on the first surface ( 301) and the third surface 303 correspond to one example of being formed at different positions. Of course, the configuration and arrangement of the connection unit 400 may vary according to embodiments.

Hereinafter, with reference to FIG. 5 , an operation of the forward/reverse converter 200 when the rotation unit 300 and the connection unit 400 are configured as shown in FIG. 4 will be described. In (a) of FIG. 5, the rotation angle of the rotating unit 300 is 0 degrees, corresponding to the state of (a) of FIG. 8, and in (b) of FIG. 5, the rotation angle is 90 degrees, which corresponds to (c) of FIG. Corresponds to the state, and in FIG. 5(c), the rotation angle is 180 degrees, corresponding to the state of FIG. 8(e). In FIG. 5 , the plurality of contacts 440 include contacts 441 to 444 .

Referring to (a) of FIG. 5 , when the rotation angle of the rotating part 300 is 0 degrees, the first connection part 410 contacts the right upper contact 442 and the right middle contact 443 to contact them. can be electrically connected. Among the first connection parts 410, the contact 440 does not exist at a position corresponding to the portion 413 formed on the third surface 303 of the rotating part 300, so it is not connected to another contact 440. Meanwhile, the second connector 420 may contact the left contact 441 and the right lower contact 444 to electrically connect them. As a result, the circuit of the motor 201 may be configured such that the part connected to the contact 441 is connected to the part connected to the contact 444 and the part connected to the contact 442 is connected to the part connected to the contact 443. there is. The state of FIG. 5 (a) may correspond to a forward mode selected by the user when, for example, the motor 201 is operated in the forward direction.

Referring to (b) of FIG. 5 , when the rotation angle of the rotation unit 300 is 90 degrees, the second surface 302 and the fourth surface 304 of the rotation unit 300 face the contacts 440. , since the distance of the second and fourth surfaces 302 and 304 from the axis of rotation is smaller than the distance of the contacts 440, neither the first contact 410 nor the second contact 420 is in contact with the contact 440. don't The circuit of the motor 201 is connected to the contacts 440, but since the contacts 440 are not connected to each other, the circuit of the motor 201 is disconnected. The state of (b) of FIG. 5 may correspond to a stop mode selected by the user when the user wants to stop the operation of the motor 201 .

Referring to (c) of FIG. 5 , when the rotation angle of the rotating part 300 is 180 degrees, the first connector 410 electrically contacts the left contact 441 and the right upper contact 442. can be connected to Meanwhile, the second connector 420 may contact the right middle contact 443 and the right lower contact 444 to electrically connect them. Among the second connectors 420, no contact 440 exists at a position corresponding to the portion 421 formed on the first surface 301 of the rotating unit 300, so it is not connected to another contact 440. (In (a) and (c) of FIG. 5, since there is a difference of 180 degrees in the angle at which the rotating part 300 is rotated, the directions of the first surface 301 and the third surface 303 are reversed.) As a result, A circuit of the motor 201 may be configured such that a portion connected to the contact 441 is connected to a portion connected to the contact 442 and a portion connected to the contact 443 is connected to a portion connected to the contact 444 . The state of FIG. 5(c) may correspond to a reverse mode selected by the user when, for example, the motor 201 is operated in a reverse direction.

In this way, when the rotating part 300 is positioned at the first rotational angle (eg, 0 degree), the contact 440 contacting each of the first connecting part 410 and the second connecting part 420 is It may be different from the contact 440 contacting each of the first connection part 410 and the second connection part 420 when positioned at two rotational angles (eg, 180 degrees), thereby moving the motor 201 in the forward and reverse directions. It becomes possible to control As described above, this structure is applicable to both AC motors and DC motors.

In particular, as described above with reference to FIG. 8, the forward and reverse converter 200 for a lift motor according to the first embodiment of the present invention has a first rotation angle (0 degree) and a second rotation angle (90 degrees). Since the shaft 330 is pressed so that the rotation unit 300 rotates at a specific rotation angle including the rotation angle, the user does not react sensitively to unintentional manipulation.

6 is a conceptual diagram illustrating the arrangement of a rotation unit 320 and a connection unit 430 applicable to a forward and reverse converter 200 for a lift motor according to a second embodiment of the present invention, and FIG. 7 is a second embodiment of the present invention. It is a conceptual diagram illustrating the operation of the forward and reverse converter 200 for a lift motor according to the example. In order to help a clear understanding of the invention, only the rotation part 320 and the connection part 430 are conceptually represented in FIG. 6, and the casing 210, the rotation guide 290 and some non-conductive discs 390 are omitted in FIG. 7. The embodiment shown in FIGS. 6 and 7 is similar to the embodiment shown in FIGS. 4 and 5, and the differences between these embodiments will be mainly described below.

Referring to FIG. 6 , in the connection part 430, the parts 431 and 433 formed on the first surface 321 and the third surface 323 of the rotating part 320 have the same size but are formed at different positions.

Hereinafter, with reference to FIG. 7 , an operation of the forward/reverse converter 200 when the rotation unit 320 and the connection unit 430 are configured as shown in FIG. 6 will be described. In (a) of FIG. 7, the rotation angle of the rotating unit 320 is 0 degrees, corresponding to the state of (a) of FIG. 8, and in (b) of FIG. 7, the rotation angle is 90 degrees, which corresponds to (c) of FIG. Corresponds to the state, and in FIG. 7(c), the rotation angle is 180 degrees, corresponding to the state of FIG. 8(e). In FIG. 7 , the plurality of contacts 440 include contacts 451 to 454 .

Referring to (a) of FIG. 7 , when the rotation angle of the rotating part 320 is 0 degrees, the connection part 430 contacts the upper left contact 451 and the lower right contact 454 to electrically connect them. can connect As a result, a circuit of the motor 201 may be configured so that a portion connected to the contact 451 is connected to a portion connected to the contact 454 . The state of (a) of FIG. 7 may correspond to a forward mode selected by the user when, for example, the motor 201 is to be operated in the forward direction.

Referring to (b) of FIG. 7 , when the rotation angle of the rotation unit 320 is 90 degrees, the second surface 322 and the fourth surface 324 of the rotation unit 320 face the contacts 440. , the second and fourth surfaces 322 and 324 do not contact the contact 440 because the distance from the axis of rotation is smaller than that of the contacts 440 . The circuit of the motor 201 is connected to the contacts 440, but since the contacts 440 are not connected to each other, the circuit of the motor 201 is disconnected. The state of (b) of FIG. 7 may correspond to a stop mode selected by the user to stop the operation of the motor 201 .

Referring to (c) of FIG. 7 , when the rotation angle of the rotating part 320 is 180 degrees, the connection part 430 contacts the lower left contact 452 and the upper right contact 453 to electrically connect them. can connect As a result, a circuit of the motor 201 may be configured so that a portion connected to the contact 452 is connected to a portion connected to the contact 453 . The state of FIG. 5(c) may correspond to a reverse mode selected by the user when, for example, the motor 201 is operated in a reverse direction.

In FIG. 7 , the contacts 451 to 454 may be connected to each other with additional wires so that the circuit of the motor 201 is not disconnected, and only the forward and reverse directions may have different circuit configurations.

9 is a front view illustrating the operation of the shaft 335 and the elastic pressing member 360 of the forward/reverse converter 200 for the elevator motor according to the third embodiment of the present invention. 9, the lever base 340 and the lever handle 380 located outside the casing 210 are represented by dotted lines. The embodiment shown in FIG. 9 is similar to the embodiment shown in FIG. 8, and the differences between these embodiments will be mainly described below.

Referring to FIG. 9 , the shaft 335 of the forward/reverse converter 200 for a lift motor according to the third embodiment of the present invention may have an elliptical cross section.

Assuming that the position of the lever handle 380 depicted in (a) of FIG. 9 is a forward operation mode, and assuming that the corresponding rotation angle of the shaft 335 and the rotation unit 300 is 0 degrees, the rotation angle is 0 degrees. When the spring 370 has a minimum value within the possible range between the elastic pressing member 360 in the direction to apply the force. In this state, the spring 370 may be configured not to apply force to the elastic pressing member 360, and even if the spring 370 applies force to the elastic pressing member 360, the shaft 335 is in the most stable position. There is no room to turn. Similarly, as shown in (e) of FIG. 9, even when the rotational angle of the shaft 335 and the rotating part 300 is 180 degrees, the shaft 335 is in the most stable position, so the spring 370 applies force to the elastic pressing member 360. Even if applied, the shaft 330 has no room to rotate. In one embodiment of the present invention, each of the forward operating mode and the reverse operating mode of the forward and reverse converter 200 for an elevator motor may be configured to correspond to one of the angles that allow the shaft 330 to be in the most stable position as described above. can

In the state of FIG. 9 (a), when the user rotates the lever handle 380, the rotation angle of the shaft 335 and the rotation unit 300 will increase. In (b), (c) and (d) of FIG. 9 , cases in which the rotational angles of the shaft 335 and the rotation unit 300 are located between 0 degrees and 180 degrees are shown. Here, the distance between the elastic pressing members 360 does not have a minimum value in the direction in which the spring 370 applies the force, and the force of the spring 370 is applied to the shaft 335 through the elastic pressing member 360.

As shown in (b) of FIG. 9, when the rotation angle exceeds 0 degrees and is less than 90 degrees, the left elastic pressing member 360 presses the upper part of the shaft 335 and the right elastic pressing member 360 presses the upper part of the shaft 335. A force will be applied to rotate the shaft 335 clockwise with respect to the rotation shaft 310 by pressing the lower part, and when the rotation angle is greater than 90 degrees and less than 180 degrees as shown in FIG. 9 (d), the left elastic pressing member ( 360 presses the lower part of the shaft 335 and the right elastic pressing member 360 presses the upper part of the shaft 335 so that a force for rotating the shaft 335 counterclockwise with respect to the rotating shaft 310 will be applied. .

As shown in (c) of FIG. 9, when the rotation angle is exactly 90 degrees and both sides are perfectly symmetrical, theoretically the rotating part 300 can maintain 90 degrees, but it is in a very unstable state, and the shaft ( 330) has an elliptical cross section, and since the surface in contact with the elastic pressing member 360 is curved, it will move to the state of (a) through (b) or to the state of (e) through (d).

As such, the shaft 335 according to the third embodiment shown in FIG. 9 will cause the rotating part 330 to be disposed at one rotation angle of 0 degrees and 180 degrees, and the user can The operating mode of the forward/reverse converter 200 can be changed only when the lever handle 380 is rotated at an angle of more than 90 degrees with great force. The above 0 degrees and 180 degrees may correspond to a first rotation angle and a second rotation angle associated with forward operation and reverse operation, for example.

According to the embodiments of the present invention presented above, by using the shafts 330 and 335 having a shape other than circular, the forward/reverse conversion device 200 for an elevator motor can prevent a reaction to erroneous operation by a very simple structure. can In particular, when a member having a shape other than circular needs to penetrate the inside and outside of the casing 210, it is difficult to provide high waterproof performance, but the shafts 330 and 335 extend from the lever base 340 having a circular cross section. By doing so, the waterproof performance can be maintained at a high level.

Even if moisture comes into contact with the contact 440 that forms part of the circuit of the motor 201 and contacts the connection part 400 that completes the circuit, the non-conductive disk 390 is connected to the first connection part 410 and the second connection part 420. It is possible to insulate between them and at the same time move moisture condensed on the connection part 400 to a position where there is no contact 440 to prevent a short circuit from occurring.

The above effect is particularly useful in the context of a fishing boat in which the lifter 10 is used, and even in an environment where the lifter motor forward and reverse converter 200 is always exposed to water and moisture and unintentional contact in a small space is frequent, moisture penetration and erroneous operation to be robust against

Although the above has been described with reference to an embodiment of the present invention, those skilled in the art can make various modifications to the present invention within the scope not departing from the spirit and scope of the present invention described in the claims below. It will be appreciated that modifications and changes may be made.

10: Seunggi Yang 200: Forward and reverse inverter
210: casing 220: inner space
300, 320: rotating part 330, 335: shaft
360: elastic pressing member 370: spring
400: connection part 440: contact

Claims (11)

A casing forming an accommodation space open to one side therein;
a plurality of contacts fixed to the casing inside the accommodation space;
a rotation unit disposed adjacent to the plurality of contacts and rotatably coupled to the casing to rotate about a virtual rotation axis;
a connecting portion provided on an outer surface of the rotating portion and allowing current to flow; and
Including a shaft coupled to the rotation unit and extending along the axial direction of the rotation shaft,
At least one of the contacts contacting the connecting portion when the rotating portion is disposed at the first rotational angle is different from a contact contacting the connecting portion when the rotating portion is disposed at the second rotational angle. .
According to claim 1,
a pair of elastic pressing members disposed to contact both sides of the shaft and made of a material capable of elastic deformation; and
Further comprising a spring configured to pull the pair of elastic pressing members in the direction of the shaft,
The forward/reverse converter for an elevator motor, characterized in that the elastic pressing member presses the shaft so that the rotation part rotates at a specific rotation angle including the first rotation angle and the second rotation angle.
According to claim 2,
The shaft is a forward and reverse converter for a lift motor, characterized in that it has a rectangular cross section.
According to claim 2,
The shaft is a forward and reverse converter for a lift motor, characterized in that it has an elliptical cross section.
According to claim 2,
The shaft is formed at an end of a lever base extending from the outside to the inside of the casing through a through hole formed in a sidewall of the casing.
According to claim 5,
Further comprising a sealing member disposed around the through hole,
The through hole has a circular shape, a portion located in the through hole of the lever base has a circular cross section, and the sealing member is mounted to closely adhere to the casing and the lever base to prevent the inflow of moisture. Forward and reverse inverter for lift motors.
According to claim 1,
the rotating portion includes a first surface at a first distance from the rotational axis, the first distance having a value greater than or equal to the distance from the rotational axis to the contact;
When the rotation part is disposed at the first rotation angle or the second rotation angle, a portion of the connection portion provided on the first surface contacts one or more of the plurality of contacts. .
According to claim 7,
The rotating part further comprises a second surface at a second distance from the rotating shaft, the second distance having a value smaller than the first distance and smaller than the distance from the rotating shaft to the contact. inverter.
According to claim 8,
the rotary part further comprises a third surface at the first distance from the axis of rotation, the second surface extending between the first surface and the third surface;
The connection part is formed at different positions on the first surface and the third surface, formed in different sizes, or formed in different positions and sizes.
According to claim 1,
The rotation unit includes a non-conductive disc having a circular shape and made of a non-conductive material, the center of the non-conductive disc is located on the rotation shaft, and a radius of the non-conductor disc is greater than a maximum distance from the rotation axis to the connecting portion, and the non-conductive disc is formed at a position spaced apart from the plurality of contacts.
According to claim 10,
A forward/reverse converter for an elevator motor, characterized in that a part of the connection portion is coupled through a through hole formed in the non-conductive disc.