KR102653268B1 - Encoder cable with waterproof cap - Google Patents

Abstract

An encoder cable including a waterproof cap according to one embodiment includes a connector installed on one side for power supply or signal transmission; a cable sheath surrounding the outside of a plurality of cable strands connected to the connector; a protection portion that covers the connector, a connecting portion of the connector and the plurality of cable strands, and at least a portion of the cable sheath from the outside; a protective tube that penetrates the cable sheath and surrounds another part of the cable sheath to prevent moisture infiltration; and a connection part through which the cable sheath penetrates and connects the protection part and the protection tube, wherein the protection part includes a head body in which the connector is built-in; and a waterproof cap through which the cable sheath penetrates and one side and the other side of which are coupled to the head body and the connection portion, respectively, wherein the waterproof cap is configured to prevent moisture from entering the cable strand and the connector. It includes a waterproofing agent filled to surround at least part of the material.

Description

Encoder cable with waterproof cap}

The examples below relate to an encoder cable including a waterproof cap. Specifically, it relates to an encoder cable having a waterproof cap that prevents moisture from penetrating into the connector of the encoder cable and a plurality of cable strands connected to the connector.

A general cable is an insulated wire that protects the wire by covering its outer shell with metal, non-metal, fiber, and synthetic resin materials, which are the lines through which power or signals are transmitted and received.

These cables are used to connect various precision machines and power equipment to transmit signals or power, but sometimes they must be installed through areas where moisture, oil, etc. enter. At this time, if moisture enters the cable or cable connection part, there is a risk that overvoltage may be applied to the connected device due to a short circuit or electric leak, causing damage to the device. Therefore, it is essential to have a waterproof function to prevent moisture from entering the cable or cable connection part.

To solve this problem, conventional attempts have been made to implement a waterproof function by providing a connection structure that covers the cable connection portion and enables sealing, or by covering the outside of the cable with a protective tube. However, the problem that moisture penetrates through the gap is still found in the water-proofing structure, such as the connection structure or protection tube, due to poor assembly or long-term use.

(Republic of Korea Registered Utility Model Gazette) No. 20-0456187

Embodiments aim to prevent moisture penetration into the connector and the plurality of cable strands connected to the connector. In particular, the purpose is to completely prevent moisture from penetrating into the connector and the cable strand, even if moisture penetrates into the joint gap of each component that protects the cable sheath covering the connector and the cable strand.

An encoder cable including a waterproof cap according to an embodiment of the present invention includes a connector installed on one side for power supply or signal transmission; a cable sheath surrounding the outside of a plurality of cable strands connected to the connector; a protection portion that covers the connector, a connecting portion of the connector and the plurality of cable strands, and at least a portion of the cable sheath from the outside; a protective tube that penetrates the cable sheath and surrounds another part of the cable sheath to prevent moisture infiltration; and a connection part through which the cable sheath penetrates and connects the protection part and the protection tube, wherein the protection part includes: a head body in which the connector is built; and a waterproof cap through which the cable sheath penetrates and one side and the other side of which are coupled to the head body and the connection portion, respectively, wherein the waterproof cap is configured to prevent moisture from entering the cable strand and the connector. It may include a waterproofing agent filled to surround at least part of the material.

The waterproofing agent may be composed of epoxy.

The connection portion includes a connection body through which the cable sheath penetrates and coupled to the waterproof cap; a tube fixing cap through which the cable sheath penetrates and one end of the protection tube is fixedly coupled; and a lock nut surrounding a portion of the protective tube, located on an opposite side of the waterproof cap with respect to the connecting body, and coupled to the connecting body, wherein the connecting body extends radially inward from the inner wall and is connected to the tube. It includes a step portion whose inner diameter is smaller than the outer diameter of the fixing cap, and when the connection body and the lock nut are coupled, the tube fixing cap is located inside the connection body, and the upper end of the tube fixing cap is connected to the step portion. It can be tightly fixed to the upper surface.

a fixing ring surrounding the protection tube and inserted into and fixed to the inside of the lock nut; and a gasket surrounding the protection tube, inserted into the lock nut, and seated on the fixing ring, and in a state where the connection body and the lock nut are coupled, the tube fixing cap, the gasket, and the fixing ring. may be closely bonded to each other.

When the waterproof cap and the connection body are combined, the lower end of the waterproof cap may be in close contact with the upper surface of the step portion.

Embodiments include an encoder cable including a connector and a cable sheath that covers the outside of a plurality of cable strands connected to the connector, including a protective tube surrounding the outside of the cable sheath, and connecting the cable sheath to the connector. It is possible to primarily prevent moisture input.

Embodiments include a protective part that covers at least a portion of the connector and the cable sheath, the protective tube, and a connection part connecting the protective part and the protective tube, and the inside of a waterproof cap among the protective parts is coated with a waterproofing agent. By filling, even if moisture penetrates through the coupling gap of each component, the waterproofing agent can prevent moisture from penetrating into the connector and the connection portion between the connector and the cable strand. Accordingly, it is possible to prevent a short circuit occurring at the connection portion between the connector and the connector and the cable strand, a device connected to the connector breaking down, or a fire occurring.

1 is a diagram for explaining an encoder cable according to an embodiment.
FIG. 2 is an enlarged view of area A of FIG. 1.
Figure 3 is an exploded perspective view of the configuration corresponding to area A of the encoder cable according to an embodiment of the present invention.
Figure 4 is a perspective view illustrating the connection body of the encoder cable and the lock nut in a disassembled state according to an embodiment of the present invention.
Figure 5 is a perspective view illustrating the waterproof cap of the encoder cable and the connection body in a disassembled state according to an embodiment of the present invention.

Hereinafter, embodiments will be described in detail with reference to the attached drawings. However, various changes may be made to the embodiments, so the scope of the patent application is not limited or limited by these embodiments. It should be understood that all changes, equivalents or substitutions to the embodiments are included in the scope of rights.

Specific structural or functional descriptions of the embodiments are disclosed for illustrative purposes only and may be modified and implemented in various forms. Accordingly, the embodiments are not limited to the specific disclosed form, and the scope of the present specification includes changes, equivalents, or substitutes included in the technical spirit.

Terms such as first or second may be used to describe various components, but these terms should be interpreted only for the purpose of distinguishing one component from another component. For example, a first component may be named a second component, and similarly, the second component may also be named a first component.

When a component is referred to as being “connected” to another component, it should be understood that it may be directly connected or connected to the other component, but that other components may exist in between.

The terms used in the examples are for descriptive purposes only and should not be construed as limiting. Singular expressions include plural expressions unless the context clearly dictates otherwise. In this specification, terms such as “comprise” or “have” are intended to designate the presence of features, numbers, steps, operations, components, parts, or combinations thereof described in the specification, but are not intended to indicate the presence of one or more other features. It should be understood that this does not exclude in advance the possibility of the existence or addition of elements, numbers, steps, operations, components, parts, or combinations thereof.

Unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as generally understood by a person of ordinary skill in the technical field to which the embodiments belong. Terms defined in commonly used dictionaries should be interpreted as having a meaning consistent with the meaning in the context of the related technology, and unless explicitly defined in the present application, should not be interpreted in an ideal or excessively formal sense. No.

In addition, when describing with reference to the accompanying drawings, identical components will be assigned the same reference numerals regardless of the reference numerals, and overlapping descriptions thereof will be omitted. In describing the embodiments, if it is determined that detailed descriptions of related known technologies may unnecessarily obscure the gist of the embodiments, the detailed descriptions are omitted.

The advantages and features of the present invention and methods for achieving them will become clear by referring to the embodiments described in detail below along with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below and will be implemented in various different forms. The present embodiments only serve to ensure that the disclosure of the present invention is complete and that common knowledge in the technical field to which the present invention pertains is not limited. It is provided to fully inform those who have the scope of the invention, and the present invention is only defined by the scope of the claims.

In the embodiments of the present invention, unless otherwise defined, all terms used herein, including technical or scientific terms, are the same as those commonly understood by a person of ordinary skill in the technical field to which the present invention pertains. It has meaning. Terms defined in commonly used dictionaries should be interpreted as having a meaning consistent with the meaning in the context of the related technology, and unless clearly defined in the embodiments of the present invention, have an ideal or excessively formal meaning. It is not interpreted as

The shapes, sizes, proportions, angles, numbers, etc. disclosed in the drawings for explaining embodiments of the present invention are illustrative, and the present invention is not limited to the matters shown. Additionally, in describing the present invention, if it is determined that a detailed description of related known technologies may unnecessarily obscure the gist of the present invention, the detailed description will be omitted. When 'includes', 'has', 'consists of', etc. mentioned in this specification are used, other parts may be added unless 'only' is used. When a component is expressed in the singular, the plural is included unless specifically stated otherwise.

When interpreting a component, it is interpreted to include the margin of error even if there is no separate explicit description.

In the case of a description of a positional relationship, for example, if the positional relationship of two parts is described as 'on top', 'on the top', 'on the bottom', 'next to', etc., 'immediately' Alternatively, there may be one or more other parts placed between the two parts, unless 'directly' is used.

When an element or layer is referred to as “on” another element or layer, it includes instances where the element or layer is directly on top of or intervening with another element. Like reference numerals refer to like elements throughout the specification.

The size and thickness of each component shown in the drawings are shown for convenience of explanation, and the present invention is not necessarily limited to the size and thickness of the components shown.

Each feature of the various embodiments of the present invention can be partially or fully combined or combined with each other, and as can be fully understood by those skilled in the art, various technical interconnections and operations are possible, and each embodiment may be implemented independently of each other. It may be possible to conduct them together due to a related relationship.

1 is a diagram for explaining an encoder cable according to an embodiment.

Referring to Figure 1, the encoder cable 1 including the waterproof cap of the present invention has a connector installed on one side and consists of a plurality of cable strands (not shown). The connector may be connected to a separate power supply, sensor unit, or control unit. The plurality of cable strands may be wrapped on the outside with a sheath.

A female connector may be installed on one side of the encoder cable 1, and a male connector may be installed on the other side. That is, the female connector or the male connector of the encoder cable 1 can be connected to various facilities to supply power or transmit signals.

As an example, the encoder cable 1 may be connected to the motor for power supply and control of the motor. The motor may be a motor used in fields that require precise control, and may be applied to various fields such as machine tools, robots, and various facilities.

As another example, the encoder cable 1 is used in a robot and can be used for data communication between a robot driving unit and a robot control unit.

The plurality of cable strands of the encoder cable 1 may be connected to the pin hole of the female connector or the internal pin of the male connector. For example, when the plurality of cable strands of the encoder cable 1 are connected to a female connector, the plurality of cable strands may be connected to pin holes of the female connector. At this time, each cable strand may be connected to the pin hole of the female connector by soldering or heat fusion. The pin hole may be a cylindrical member made of a conductive material.

As another example, when the plurality of cable strands of the encoder cable 1 are connected to a male connector, the plurality of cable strands may be connected to internal pins of the male connector. At this time, each cable strand may be connected to the internal pin of the male connector by soldering or heat fusion.

Hereinafter, the description will be made on the assumption that the plurality of cable strands are connected to the female connector. The plurality of cable strands may be two or more cable strands.

As part of the encoder cable 1, area A of FIG. 1 includes a connector 215, a plurality of cable strands (not shown) connected to the connector 215, and a cable sheath surrounding the outside of the plurality of cable strands ( 10), shows a configuration for protecting the connector 215 and the cable sheath 10.

FIG. 2 is an enlarged view of area A of FIG. 1. Referring to FIG. 2, the encoder cable 1 includes a connector 215, a cable sheath 10 surrounding the outside of a plurality of cable strands connected to the connector 215, and the cable sheath 10. It may include a protection portion 20 that penetrates and covers at least a portion of the connector 215 and the cable sheath 10.

The protection unit 20 includes a head body 210, 220 in which the connector 215 is built and covers the outside of the connector 215, and is coupled to the head body 210, 220 and includes the cable sheath 10. It may include a waterproof cap 230 that covers at least part of the.

The cable sheath 10 penetrates the waterproof cap 230 and can be coupled to the connector 215 inside the head body 210 and 220. Specifically, the cable sheath 10 is positioned through the waterproof cap 230, and a plurality of cable strands (not shown) in the cable sheath 10 are connected to the head body 210 and 220 and the waterproof cap 230. It can be connected to the connector 215 on the inside of the cap 230. As an example, a plurality of cable strands in the cable sheath 10 are connected inside the head body 210, 220 and the waterproof cap 230 by a connection device (not shown) formed of a conductive material such as metal. It can be connected to the pin hole of the connector 215.

The head bodies 210 and 220 include a first head body 210 and a second head body 220, where one side is coupled to the first head body 210 and the other side is coupled to the waterproof cap 230. It can be included. The first head body 210 embeds the connector 215 and can cover the outside of the connector 215. The second head body 220 may cover the outside of a portion where the connector 215 and a plurality of cable strands in the cable sheath 10 are connected.

The waterproof cap 230 may have a hollow portion 213a formed therein so that the cable sheath 10 penetrates. The inner diameter of the waterproof cap 230 may be larger than the outer diameter of the cable sheath 10. That is, when the cable sheath 10 is located in the hollow portion 213a of the waterproof cap 230, the cable sheath 10 may be arranged to be spaced apart from the inner wall of the waterproof cap 230.

At this time, the cable sheath 10 may be positioned in the hollow portion 213a of the waterproof cap 230 and fixed in place by a waterproofing agent 100 to be described later.

As an example, the waterproof cap 230 may be formed in the shape of a hollow cylinder or a curved hollow cylinder. When the waterproof cap 230 is formed as a curved hollow cylinder, it may be formed in an 'ㄱ' shape.

In addition, the encoder cable 1 has a protective tube 15 through which another part of the cable sheath 10 penetrates and protects the outside of the cable sheath 10, and the protective tube 15 and the protection portion. It may further include connection parts (30, 40, 50) connecting (20).

The protective tube 15 may be flexible and may be made of metallic or plastic material. The protective tube 15 is configured to contain the cable sheath 10 and surround the cable sheath 10 without exposing it to the outside, so that the cable sheath 10 and the cable inside the cable sheath 10 It is possible to prevent strands (not shown) from being damaged or disconnected by external actions.

The protective tube 15 may be formed in a shape to prevent moisture from entering. That is, the cable sheath 10 and the connector 215 can be primarily protected from moisture by the protective tube 15.

The connecting portions 30, 40, and 50 are located between the protective tube 15 and the waterproof cap 230, and can connect the protective tube 15 and the waterproof cap 230. When coupled to the waterproofing cap 230, the connecting portions 30, 40, 50, and the protective tube 15, the cable sheath 10 is located inside, and the waterproofing cap 230 and the connecting portion The solid combination of (30, 40, 50) and the protective tube (15) can prevent moisture from entering the interior.

Figure 3 is an exploded perspective view of the configuration corresponding to area A of the encoder cable according to an embodiment of the present invention. Specifically, Figure 3 shows a state in which the protection part 20, the connection parts 30, 40, and 50, and the protection tube 15 are disconnected.

Referring to FIG. 3, the encoder cable 1 may include the protection part 20, the connection parts 30, 40, and 50, the protection tube 15, and the cable sheath 10. The cable sheath 10 is not exposed to the outside when coupled to the protection part 20, the connection parts 30, 40, 50, and the protection tube 15, but the protection part 20 and the connection part When the combination of (30, 40, 50) and the protective tube (15) is released, it may be exposed to the outside.

The waterproof cap 230 of the protective part 20 is formed on the waterproof cap body 231 and the waterproof cap body 231 forming a hollow portion 231a therein, and is connected to the connection body 30 to be described later. It may include threads 233 for coupling.

The connection parts (30, 40, 50) are coupled to the waterproof cap (230) and surround the outside of the connection body (30) through which the cable sheath (10) penetrates and the protection tube (15). ) and a lock nut 40 coupled to the protective tube 15. It may include a tube fixing cap 50 coupled to one end of the protective tube 15 and fixing one side of the protective tube 15.

The connection body 30 may be formed so that the cable sheath 10 penetrates. The connection body 30 may include an upper body 31 that forms a hollow portion 31a therein and is coupled to the waterproof cap 230. The upper body 31 may be formed with a screw thread 32 that is screwed to the screw thread 233 of the waterproof cap 230. One of the threads 233 of the waterproof cap 230 and the thread 32 of the upper body 31 may be externally threaded, and the other may be internally threaded.

For example, the inner diameter of the upper body 31 may be larger than the outer diameter of the waterproof cap 230.

The connection body 30 may further include a lower body 35 extending from the upper body 31 and coupled to the lock nut 40. The lower body 35, like the upper body 31, may be formed so that the cable sheath 10 passes through it. That is, the lower body 35 may have a hollow portion 35a inside it that communicates with the hollow portion 31a of the upper body 31.

At this time, the hollow part 31a of the upper body 31 can be defined as the upper hollow part, and the hollow part 35a of the lower body 35 can be defined as the lower hollow part. The hollow portion of the connection body 30 may be a hollow portion including the upper hollow portion and the lower hollow portion.

The lower body 35 may be formed with a thread 37 that is screwed to the thread 45 of the lock nut 40. One of the threads 37 of the lower body 35 and the thread 45 of the lock nut 40 may be externally threaded, and the other may be internally threaded.

At this time, the screw thread 32 of the upper body 31 can be defined as the upper screw thread, and the screw thread 37 of the lower body 35 can be defined as the lower screw thread.

For example, the outer diameter of the lower body 35 may be smaller than the outer diameter of the upper body 31.

For example, the inner diameter of the lower body 35 may be smaller than the inner diameter of the upper body 31, or may be formed to be the same as the inner diameter of the waterproof cap 230.

The inner diameter of the connection body 30 may be larger than the outer diameter of the cable sheath 10. That is, when the cable sheath 10 is located in the hollow portion of the connection body 30, the cable sheath 10 may be arranged to be spaced apart from the inner wall of the connection body 30.

The lock nut 40 surrounds a portion of the protective tube 15 and may be located on the opposite side from the waterproof cap with respect to the connection body.

The lock nut 40 may be formed so that the protection tube 15 penetrates. The lock nut 40 forms a hollow portion 41a therein and may include a nut body 41 coupled to the connection body 30. The nut body 41 may be formed with a screw thread 45 that is screwed to the screw thread 37 of the lower body 35 of the connecting body 30. One of the screw threads 45 of the nut body 41 and the screw thread 37 of the lower body 35 may be formed as an external thread and the other may be formed as an internal thread.

When the connection body 30 and the lock nut 40 are combined, they are tightly sealed, preventing the inflow of moisture and maintaining a solid connection.

For example, the lock nut 40 is formed in the shape of a hexagonal nut so that it can be easily rotated using a tool.

The inner diameter of the lock nut 40 may be larger than the outer diameter of the protective tube 15. That is, when the lock nut 40 and the connection body 30 are screwed together, the outer surface of the protection tube 15 may be spaced apart from the inner wall of the lock nut 40.

The tube fixing cap 50 may be formed so that the cable sheath 10 penetrates. The tube fixing cap 50 forms a hollow portion 51a on the inside, and includes a fixing cap body 51 at least partially surrounding the outside of the protection tube 15 and a flange extending from the fixing cap body 51. (53) may be included.

At least a portion of the cable sheath 10 and the protective tube 15 may be located in the hollow portion 51a of the fixed cap body 51. One end of the protective tube 15 is located in the hollow portion 51a of the fixed cap body 51, that is, the fixed cap body 51 and at least a portion of the protective tube 15 are positioned to overlap. .

At least a portion of the protective tube 15 may be fixed to the inner wall of the fixed cap body 51. As an example, at least a portion of the protective tube 15, including one end of the protective tube 15, may be fixed to the inner wall of the fixed cap body 51 by soldering or heat fusion.

The flange 53 may extend obliquely outward from the fixed cap body 51. That is, the flange 53 may be formed to have a larger diameter as it moves away from the fixed cap body 51.

The outer diameter of the fixed cap body 51 may be the same as or smaller than the inner diameter of the lower body 35 of the connecting body 30. That is, at least a portion of the fixed cap body 51 may be inserted into the lower body 35 of the connecting body 30.

The outer diameter of the flange 53 may be smaller than the inner diameter of the lock nut 40. That is, at least a portion of the flange 53 may be inserted into the lock nut 40.

The encoder cable 1 may further include a gasket 60 and a fixing ring 70 to strengthen the coupling of the connecting portions 30, 40, and 50. When the connecting portions 30, 40, and 50 are coupled, the gasket 60 and the retaining ring 70 may be located inside the lock nut 40.

The gasket 60 may be made of a rubber material. As an example, a plurality of gaskets 60 may be provided and may include a first gasket 60a and a second gasket 60b.

The fixing ring 70 may be made of a metal material. The fixing ring 70 may be inserted into the lock nut 40 and fixed to a point inside the lock nut 40.

For example, the inner diameter of one side of the lock nut 40 may be larger than the outer diameter of the fixing ring 70, and the inner diameter of the other side may be smaller than the outer diameter of the fixing ring 70. That is, the fixing ring 70 can be inserted into the lock nut 40 and then hung on the inner wall of the lock nut 40 to be fixed.

Hereinafter, the joining process of the connecting portions 30, 40, and 50, the gasket 60, and the retaining ring 70 will be described. With the protection tube 15 penetrating the lock nut 40, the fixing ring 70 and the gasket 60 are sequentially inserted into the lock nut 40. The gasket 60 is seated on the fixing ring 70 while the fixing ring 70 is caught at a point on the inner wall of the lock nut 40.

With the fixing ring 70 and the gasket 60 seated inside the lock nut 40, at least a portion of the tube fixing cap 50 is inserted into the lock nut 40. Specifically, at least a portion of the flange 53 of the tube fixing cap 50 may be inserted into the lock nut 40 and seated on the gasket 60.

With the flange 53 of the tube fixing cap 50 seated on the gasket 60, the connection body 30 and the lock nut 40 can be screwed together. Specifically, the fixing cap body 51 of the tube fixing cap 50 is inserted into the lower body 35 of the connecting body 30, and the lower body 35 is connected to the lock nut 40. It is inserted inside. At this time, the lower body 35 may be screwed to the lock nut 40 with at least a portion of the lower body 35 inserted into the lock nut 40 .

In a state where the lower body 35 of the connection body 30 and the lock nut 40 are screwed together, the tube fixing cap 50, the gasket 60, and the fixing ring 70 are connected to the lower body ( 35) and the lock nut 40, they can be tightly coupled to each other and are not exposed to the outside. In particular, when the lower body 35 of the connecting body 30 and the lock nut 40 are screwed together, at least a portion of the gasket 60 is elastically deformed to connect the connecting body 30 and the lock nut ( 40) can be sealed.

Therefore, the tube fixing cap 50, the gasket 60, and the fixing ring 70 are connected to the lock nut 40 and the connection body 30 inside the lock nut 40 and the connection body 30 ( By sealing the internal space of 30), it is possible to secondarily prevent moisture from flowing into the cable sheath 10.

Figure 4 is a perspective view illustrating the connection body of the encoder cable and the lock nut in a disassembled state according to an embodiment of the present invention.

Referring to FIG. 4, the connection body 30 may further include a step portion 33 extending radially inward from the inner wall of the lower body 35. The inner diameter of the stepped portion 35 may be larger than the outer diameter of the tube fixing cap 50.

When the connection body 30 and the lock nut 40 are screwed together, the fixing cap body 51 of the tube fixing cap 50 may be in close contact with the step portion 35. That is, in a state in which the connection body 30 and the lock nut 40 are coupled, the tube fixing cap 50 is tightly fixed to the step portion 35 of the connection body 30, thereby allowing moisture to enter the connection. It is possible to prevent input into the body 30.

Figure 5 is a perspective view illustrating the waterproof cap of the encoder cable and the connection body in a disassembled state according to an embodiment of the present invention.

Referring to FIG. 5, the encoder cable 1 may include the waterproof cap 230 and a waterproofing agent 100 filled inside the waterproof cap 230.

The waterproofing agent 100 may be filled through the hollow portion 231a of the waterproofing cap 230 while the cable sheath 10 penetrates the waterproofing cap 230. The waterproofing agent 100 is filled to surround at least a portion of the cable sheath 10 and can form a waterproofing layer.

Specifically, the waterproofing agent 100 is applied through the hollow portion 231a of the waterproofing cap 230 in a direction away from the portion where the plurality of cable strands in the cable sheath 10 and the connector 215 are connected. It can be filled toward the connected part. Even if moisture penetrates through the joint gap between the waterproof cap 230 and the connecting body 30, the part where the cable sheath 10 and the connector 215 are connected by the filled waterproofing agent 100 It can prevent moisture from penetrating.

Furthermore, by treating the inside of the waterproof cap 230 with the waterproofing agent 100, the connection between the connection body 30 and the waterproof cap 230, or the connection between the connection body 30 and the lock nut 40 Even if the bond is weakened or cracked due to external impact, etc., moisture can be completely prevented from entering the cable strands within the cable sheath 10 and the connector 215.

As an example, the waterproofing agent 100 may be composed of epoxy.

As another example, the waterproofing agent 100 may be urethane, curable acrylic, polyester, polyurea, etc.

The waterproof cap 230 may further include a step portion 235 in which a step is formed from one end close to the connection body 30. The inner diameter of the waterproof cap 230 may be understood as the inner diameter of the stepped portion 235. At this time, the waterproofing agent 100 may be spaced apart from the step portion 235 while being filled inside the waterproofing cap 230.

When the waterproof cap 230 and the connection body 30 are screwed together, the lower end of the waterproof cap 230 may be seated on the step portion 33 of the connection body 30. That is, when the waterproof cap 230, the connecting body 30, and the lock nut 40 are combined, the lower end of the waterproof cap 230 is seated on the upper surface of the step portion 33, and the tube The upper end of the fixing cap 50 may be seated on the lower surface of the stepped portion 33. Therefore, even if moisture penetrates into the gap between the waterproof cap 230 and the connection body 30 or the gap between the connection body 30 and the lock nut 40, the waterproof cap 230 and the connection Due to the tight coupling structure of the body 30 and the lock nut 40, moisture can be prevented from entering the interior.

The structure for waterproofing the encoder cable 1 according to an embodiment of the present invention will be described as follows. First, by arranging the protection tube 15 to surround the outside of the cable sheath 10, it is possible to primarily prevent moisture from entering the cable sheath 10.

Second, in a state in which the connection body 30 and the lock nut 40 are screwed together, the cable sheath is secured through tight coupling of the gasket 60, the fixing ring 70, and the tube fixing cap 50. Moisture input into (10) can be prevented secondarily.

Third, in a state in which the waterproof cap 230, the connecting body 30, and the connecting body 30 and the lock nut 40 are screwed together, the step portion 33 of the connecting body 30 is centered. It is possible to thirdly prevent moisture from entering the cable sheath (10) through tight coupling.

Fourth, due to the waterproofing agent 100 filled inside the waterproofing cap 230, even if there is a gap between the waterproofing cap 230, the connecting body 30, the lock nut 40, and the protective tube 15, Even if moisture enters the gap, it is possible to completely prevent moisture from entering the cable strands in the cable sheath 10 and the connector 215.

Although embodiments of the present invention have been described in more detail with reference to the accompanying drawings, the present invention is not necessarily limited to these embodiments, and various modifications may be made without departing from the technical spirit of the present invention. . Accordingly, the embodiments disclosed in the present invention are not intended to limit the technical idea of the present invention, but are for illustrative purposes, and the scope of the technical idea of the present invention is not limited by these embodiments. Therefore, the embodiments described above should be understood in all respects as illustrative and not restrictive. The scope of protection of the present invention should be interpreted in accordance with the claims below, and all technical ideas within the equivalent scope should be construed as being included in the scope of rights of the present invention.

Therefore, other implementations, other embodiments, and equivalents of the claims also fall within the scope of the following claims.

1: Encoder cable 10: Cable sheath
15: protection tube 20: protection part
210,220: Head body 215: Connector
230: Waterproof cap 30: Connection body
40: Lock nut 50: Tube fixing cap
60: gasket 70: retaining ring
100: Waterproofing agent

Claims (5)

A connector installed on one side for power supply or signal transmission;
a cable sheath surrounding the outside of a plurality of cable strands connected to the connector;
a protection portion that covers the connector, a connecting portion of the connector and the plurality of cable strands, and at least a portion of the cable sheath from the outside;
a protective tube that houses the cable sheath and covers another part of the cable sheath so as not to expose it to the outside to prevent moisture infiltration; and
The cable sheath penetrates and includes a connection portion connecting the protection portion and the protection tube,
The protection unit includes a head body in which the connector is embedded; and
A waterproof cap through which the cable sheath penetrates, one side and the other side of which is coupled to the head body and the connection portion, respectively, and a hollow portion formed therein so that the cable sheath penetrates,
The waterproof cap is filled through a hollow portion of the waterproof cap and includes a waterproofing agent filled to surround at least a portion of the cable sheath to prevent moisture from entering the cable strand and the connector,
The connection part includes a connection body through which the cable sheath penetrates and coupled to the waterproof cap;
A tube fixing cap coupled to one end of the protective tube and fixing one side of the protective tube; and
A lock nut surrounds a portion of the protective tube, is located on the opposite side of the waterproof cap with respect to the connection body, and is coupled to the connection body,
The connection body includes an upper body formed with an upper hollow portion therein so that the cable sheath penetrates and screwed to the waterproof cap;
a lower body extending from the upper body, having a lower hollow portion formed therein that communicates with the upper hollow portion, and being screw-coupled with the lock nut; and
It includes a stepped portion extending radially inward from the inner wall of the lower body,
a fixing ring surrounding the protection tube and inserted into and fixed to the inside of the lock nut; and
It further includes a gasket surrounding the protective tube, inserted into the lock nut, and seated on the retaining ring,
At least a portion of the protective tube is fixed to the inner wall of the tube fixing cap by soldering or heat fusion,
In a state in which the connection body and the lock nut are coupled, the tube fixing cap, the gasket, and the fixing ring are located inside the lower body and the lock nut, and the tube fixing cap, the gasket, and the fixing ring are in close contact with each other. are combined,
When the waterproof cap, the connection body, and the lock nut are screwed together, the lower end of the waterproof cap is seated on the upper surface of the step portion of the connection body, and the upper end of the tube fixing cap is attached to the lower surface of the step portion of the connection body. It is seated and tightly fixed on the
Encoder cable with waterproof cap.
According to claim 1,
An encoder cable including a waterproof cap, wherein the waterproofing agent consists of epoxy. According to claim 1,
The waterproof cap further includes a step portion where a step is formed from one end close to the connection body,
The waterproofing agent is spaced apart from the step while being filled inside the waterproofing cap.
Encoder cable with waterproof cap.
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