KR101671266B1

KR101671266B1 - Rotary Joint Device using the Non-Contact Communication Method

Info

Publication number: KR101671266B1
Application number: KR1020160044881A
Authority: KR
Inventors: 서상배; 원광문
Original assignee: 주식회사 서원로보테크; 서상배
Priority date: 2016-04-12
Filing date: 2016-04-12
Publication date: 2016-11-02

Abstract

Disclosed is a rotary joint device using a non-contact communication method, comprising: a shaft connected to a power generating unit and rotated; an internal body coupled to an outer side of the shaft, having a flow channel in which a gas is transferred; an external body coupled to an outer side of the internal body, allowing a gas to be injected from the outside, a transmission unit coupled to an inside of the shaft, receiving a signal from an external sensor, and transmitting the received signal; a reception unit receiving a signal from the transmission unit; a terminal strip connected to a contact of the transmission unit by a conducting wire and formed on an outer circumferential surface of the shaft; and a power terminal grounded to the terminal strip wherein a signal is transmitted to the outside, and a grounding state is maintained between the terminal strip and the power terminal when the shaft is rotated. As such, electrical signal of the transmission unit rotated in accordance with the rotation of the shaft is able to stably be transmitted to a reception unit formed outside when the shaft is rotated; thereby enhancing stability.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a rotary joint device using a non-

The present invention relates to a rotary joint apparatus using a contactless communication system, and more particularly, to a rotary joint apparatus in which a plurality of rotors are rotatably coupled to the inside and outside of a rotary joint, And more particularly, to a rotary joint apparatus using a contactless communication system that enables communication to be continuously performed despite rotation of the rotary joint.

In order to rotate a workpiece in an automation machine or an industrial machine, a rotary unit is mounted on the tip of a multi-axis robot arm, a rotary body having a plurality of grippers or the like is mounted on the shaft, and a pneumatic line It is used in connection with the rotating body.

In the conventional rotary unit, since the pneumatic line for operating the gripper, the cylinder, and the like mounted on the rotary body is exposed to the outside, it is impossible to rotate the rotary body by 360 ° and the safety due to the falling of the workpiece And it is impossible to control the robot in one direction by the pneumatic line. Therefore, there is a problem that productivity is deteriorated due to high defect rate due to unstable posture of the robot.

Korean Patent Application No. 10-2000-0014631 discloses a reduction gear type servo rotating apparatus for preventing a wire short circuit and an air duct from being twisted.

This is used to rotate a rotating body equipped with a plurality of grippers, cylinders, motors, and the like (actuators) at a certain angle. The air pipe and the electric wire are connected to each other by using the output shaft of the speed reducer, It is possible to operate gripper, cylinder, motor, etc. by supplying air or electricity to the rotating body without piping.

A plurality of rotating bodies are rotatably coupled to a shaft rotated at a center so as to be inserted into the inside and outside of the rotating body, respectively, and each of the inside and outside rotating bodies is rotated individually with respect to each other, And a contactless communication that enables the electrical contact between the transmission module housed in the inner rotating body and the signal receiving module mounted in the outer rotating body to maintain the grounding state so that communication can be performed without a short circuit despite the rotation drive of the outer rotating body The present invention has been made in view of the above problems.

A rotary joint apparatus using a contactless communication system according to an embodiment disclosed herein includes a shaft that is connected to and rotated by a power generating unit, an inner body that is coupled to an outer side of the shaft and in which a flow path through which gas is fed, And a transmission unit coupled to the inside of the shaft for receiving a signal from the external sensor and a receiver for receiving a signal of the transmission unit, And a power supply terminal grounded to the terminal block is formed on one side of the external body so that a ground state between the terminal block and the power supply terminal can be maintained when the shaft rotates.

According to the embodiment, the terminal block is formed in the circumferential direction on the outer circumferential surface of the shaft and is formed by being recessed to a certain depth.

According to the embodiment, the power supply terminal is formed to be tilted in the tangential direction on the outer peripheral surface of the terminal block, and the contact protrusion formed at one end is grounded to the terminal block.

According to the embodiment, the terminal block is constituted by a first ring body formed by a conductor and a second ring body made of an insulator smaller in diameter than the first ring body so that the outer peripheral surface of the second ring body is recessed from the outer peripheral surface of the first ring body, And the contact protrusions of the power terminal are contactably supported on the outer circumferential surface of the second ring body.

According to an embodiment of the present invention, there is provided an electronic component mounting apparatus comprising: a substrate which is in close contact with an inner circumferential surface of a shaft; and a fixing screw which penetrates through the substrate and is coupled to a shaft and a terminal block, And the fixing screw is engaged.

According to the embodiment, the outer surface of the fixing screw is coated with an insulating material to form an insulating film.

According to the disclosed embodiments, it is possible to stably transmit the rotation of the shaft and the electric signal of the transmitting part, which is rotated together with the shaft, without being short-circuited to the receiving part formed outside, thereby improving the stability.

In addition, when the gas is supplied through the outer rotating body, the gas can be continuously discharged through the inner rotating body, which rotates, so that the supply of gas is continuously ensured even during the rotation operation of the two rotating bodies The flow of the gas is not disturbed even in the multi-directional switching of the robot arm applied by such gas supply assurance, so that a series of processes such as various gas welding and cooling gas supply performed by the robot arm can be performed smoothly There is an effect.

In addition, it is possible to prevent clogging of a plurality of hoses connected to an external gas supply port, thereby achieving an improvement in working efficiency and a sufficiently stable operation even if the robot arm is applied to a more complicated precision process.

1 is a front partial cutaway perspective view showing a rotary joint apparatus using a contactless communication method according to an embodiment,
FIG. 2 is a rear partial cutaway perspective view illustrating a rotary joint apparatus using a contactless communication method according to an embodiment. FIG.
3 is a cross-sectional view of a rotary joint apparatus using a contactless communication method according to an embodiment,
4 is an exploded perspective view of a rotary joint apparatus using a contactless communication method according to an embodiment,
FIG. 5 is a partially enlarged perspective view of FIG. 4,
FIG. 6 is a perspective view partially enlarged in FIG. 5,
FIG. 7 is a perspective view of a combined part of FIG. 4,
FIG. 8 is a front view of the engaging portion of FIG. 1 partially enlarged; FIG.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory and are intended to provide further explanation of the invention as claimed. It does not mean anything.

In addition, the size and shape of the components shown in the drawings may be exaggerated for clarity and convenience of explanation, and the terms specifically defined in consideration of the configuration and operation of the present invention may vary depending on the intention or custom of the user, operator It should be noted that the definitions of these terms should be made on the basis of the contents throughout this specification.

FIG. 1 is a front partial cutaway perspective view illustrating a rotary joint apparatus using a contactless communication system according to an embodiment. FIG. 2 is a cross-sectional view illustrating a rotary joint apparatus using a contactless communication system according to an embodiment. FIG. 4 is an exploded perspective view illustrating a rotary joint apparatus using a contactless communication system according to an embodiment of the present invention. FIG. 5 is an exploded perspective view of the rotary joint apparatus according to an embodiment of the present invention. FIG. 6 is a partially enlarged perspective view of FIG. 4, FIG. 7 is a perspective view of an enlarged portion of FIG. 4, and FIG. 8 is an enlarged partial front view of FIG. .

As shown in FIGS. 1 to 8, in the rotary joint apparatus using the contactless communication method according to an embodiment,

(Not shown) connected to the power generating unit, a shaft 2 connected to the speed reducer and rotated, an inner body 4 coupled to the outer side of the shaft 2, And an attachment flange 8 coupled to an end of the inner body 4 and the outer body 6 and connected to a pipe for supplying gas to the robot arm (not shown).

The power generating unit may include a motor, a cylinder, and the like.

A plurality of gas injection ports 62 are formed in the outer body 6 and a flow path groove 42 through which the gas injected through the gas injection port 62 moves is formed in the inner body 4.

A bearing (3) is provided to stably maintain the rotation of the inner body (4) and the outer body (6).

It should be noted that the inner body 4 and the outer body 6 described in the disclosed invention are names determined based on their respective combined positions, and therefore it is not necessary to determine the inside or the outside in addition to the distinction criterion.

Thus, the inside and outside mean that one of the two components and the other one is the other.

The shaft 2 is formed with a flange 22 on one side thereof to be mounted on the reducer 100 and has a hollow portion on the inside thereof and a step 24 formed on the outer circumferential surface thereof to exert a rotational force, .

A transmitter 200 receiving a signal from an external sensor (not shown) is inserted through the opening hole 26 and inserted.

A keyhole 27 is formed on a peripheral side wall of the opening hole 26 at one side of the outer circumferential surface of the shaft 2. The keyhole 27 is formed by being cut in the longitudinal direction from the periphery of the opening hole 26 and the key 300 is coupled to the keyhole 27.

The key 300 is also engaged with the outer circumferential surface of the inner body 4. Therefore, the shaft 2 and the inner body 4 can be rotationally driven integrally without being slipped by the key engagement.

The inner body 4 has a cylindrical shape and is coupled to the outer side of the shaft 2 to be integrally rotated and has a plurality of flow grooves 42 formed on the outer circumferential surface thereof. 43 are formed in the inside thereof, and an air hole 44 communicating with the flow path 43 is formed at one end.

The inner body 4 has a cylindrical shape and a plurality of flow grooves 42 are formed in the outer peripheral surface of the inner body 4 along the circumferential direction.

Each of the plurality of flow grooves 42 has a through hole 41 communicating with the flow path 43 so that the gas can be transferred to the inner flow path 43 through the through hole 41.

The flow path 43 is formed in the longitudinal direction inside the inner body 4 and one end is formed to communicate with the air hole 44. The flow path groove 42 and the flow path 43 are formed to correspond to each other at a ratio of 1: .

Therefore, one through hole 41 and one through-hole groove 42 are formed on either side of the flow path groove 42 formed in a circular shape.

Therefore, if four flow grooves 42 are formed as shown in the drawing, four flow paths 43 are formed radially inside the inner body 4.

In addition, a key groove, to which the key 300 of the shaft 2 can be coupled, is formed on the outer circumferential surface of the inner body 4 in the longitudinal direction.

The outer body 6 is formed in a cylindrical shape like the inner body 4 and has a plurality of bearings 3 coupled to the outer circumferential surface of the inner body 4 at both ends, And is coupled to the outside of the inner body 4, and a plurality of gas injection ports 62 are formed.

A passage (passage 60) is formed in the outer body 6 so that the inner body 4 is coupled therewith and a bearing seating portion 67 in which the bearing 3 is inserted into both sides of the inner periphery is formed.

A sealing seal 68 is provided between the plurality of gas injection ports 62 on the inner circumferential surface of the passage 60.

The hermetic seal 68 is made of a soft material having a cross section in cross section and is formed in a substantially ring shape so that the lower two ribs are tightly attached to the outer peripheral surface of the inner body 4 one by one so as to exhibit airtightness.

Therefore, the gas passing through the flow path groove 42 is not leaked to the outside (this is a gap between the inner and outer surfaces) by the sealing seal 68, and gas loss can be prevented.

A seal inserting groove 69 is formed in the inner circumferential surface of the passage 60 in the circumferential direction so that the seal seal 68 is inserted.

The seal insertion groove 69 is preferably formed between the two gas injection ports 62.

And a bearing cover 32 coupled to one end of the external body 6 and coupled to cover the bearing 3.

A through hole 41 is formed in the center of the bearing cover 32 so as to allow one end of the inner body 4 to pass therethrough and a bearing 3 is inserted into a surface of the bearing cover 32, do.

The attachment flange 8 is coupled to the bearing cover 32 and has a flow passage 81 communicating with the flow passage groove 42 of the inner body 4 and has an outlet port 82 communicating with the flow passage 813 And a tool joint 400 is connected to the outflow port 82. [0050]

The tool joint 400 is a fitting unit, which is a connecting part usually used for assembling pipes. Since this is a technique known to a person skilled in the art, a detailed description thereof will be omitted.

Thereafter, a pipe supplied to various uses is connected to the tool joint 400, so that the gas can be supplied to the end use place.

According to an embodiment of the present invention, a transmitter 200 connected to the outside of the shaft 2 and rotated together with the transmitter 2 generates a signal, and a receiver 280 receiving the signal of the transmitter 200 .

The transmitting unit 200 and the receiving unit 280 collect signals transmitted from an external sensor (not shown), read the eigenvalue, send the signal to the controller, and proceed to the next process.

The transmitting unit 200 includes a body 210 coupled to the inside of the shaft 2 and a radiator 220 formed at one side of the body 210 to generate a low frequency signal,

A plurality of PCBs 230 are accommodated in the body 210 and contacts 510 are formed on one side of the outer surface of the transmitter 220.

A plurality of circuits, relays and the like for receiving signals are arranged in the PCB 230.

The shape of the body 210 need not be specified, and the number of the PCB 230 housed therein is not limited.

One end of the conductive wire 520 is connected to the contact point 510 and the other end of the conductive wire 520 is connected to the terminal board 7 formed on the outer peripheral surface of the shaft 2.

A receiver 280 for receiving a low frequency signal of the radiator 220 is provided outside the transmitter 200.

A power supply terminal 52 that is grounded to the terminal block 7 is provided so that power can be supplied to the transmission unit 200 from the outside and the ground state between the terminal block 7 and the power supply terminal 52 during rotation of the shaft 2 So that power supply is not interrupted.

The power supply terminal 52 is composed of two power supply units, one of which is 0V and the other of which is 24V. The voltage is set corresponding to the rated power required for the sensor.

The terminal block 7 is coupled to the outer circumferential surface of the shaft 2, and a plurality of recesses 73 are formed on the outer surface, and the recesses 73 are formed in the circumferential direction.

The terminal block 7 is composed of a first ring body 71 formed of an insulator and a second ring body 72 having a smaller diameter than the first ring body 71 and made of a conductor, The concave portion 73 is formed so as to be recessed and recessed from the outer circumferential surface of the one-

The contact protrusions 521 of the power supply terminal 52 are contactably supported on the outer circumferential surface recessed portion 73 of the second ring member 72. [

Preferably, the second ring body 72 is made of copper (Cu) having conductivity.

The power supply terminal 52 is formed of a thin conductive metal plate and is tilted in the tangential direction on the outer peripheral surface of the terminal block 7 and the contact protrusion 521 formed at one end is grounded to the terminal block 7.

And a bracket 54 formed with a contact portion 542 through which the other end of the power source terminal 52 is connected and energized.

The bracket 54 is coupled to a plate member 59 coupled to one side of the outer body 6. Preferably, the bracket 54 is coupled to the side of the plate member 59 in a cantilevered manner.

One end of the power supply terminal 52 is screwed to the bottom surface of the bracket 54 and a contact portion 542 is formed on the upper surface of the bracket 54 in correspondence with the screw 55 to which the power supply terminal 52 is fastened .

A substrate 56 which is in close contact with the inner circumferential surface of the shaft 2 and a fixing screw 58 which penetrates through the substrate 56 to be coupled to the shaft 2 and the terminal block 7 are formed.

A grounding nut 57 is attached to the outer surface of the substrate 56 and a conductive wire 574 is connected to one side of the grounding nut 57.

A ground nut 57 connected to the conductive wire 574 closely contacts and a fixing screw 58 is inserted through the substrate 56 and the ground nut 57 and the fixing screw 58 is connected to the shaft 2 And is then coupled to the second ring body 72 of the terminal block 7.

An insulating material is coated on the outer circumferential surface of the fixing screw 58 to form an insulating film 582 so as to be insulated from the shaft 2 and the terminal block 7.

And a cover member 9 coupled to enclose the terminal block 7, the power supply terminal 52 and the bracket 54. [

The cover member 9 is formed with a port 92 through which the electric wire is passed.

The operation of the thus configured embodiment will be described as follows.

A flange 22 is coupled to one side of the speed reducer to mount the shaft 2, and the transmission unit 200 is inserted into the shaft 2.

The inner body 4 is fitted into the outer side of the shaft 2 and the shaft 2 and the inner body 4 can be integrated by the coupling of the key 300. [

Thereafter, the outer body 6 is fitted to the outer side of the inner body 4.

Bearings (3) are provided on both ends of the outer peripheral surface of the inner body (4).

Since the sealing member 68 is inserted into the seal insertion groove 69 inside the outer body 6, a part of the upper rib of the sealing seal 68 is closely attached to the outer circumferential surface of the inner body 4 to have airtightness .

Thereafter, the bearing cover 32 and the attachment flange 8 are coupled to one end of the inner body 4 and the outer body 6.

A tool joint 400 is connected to the attachment flange 8, and a pipe is connected to the tool joint 400 to complete the assembly.

Thereafter, when the speed reducer 100 is driven, the shaft 2 is rotated and the inner body 4 coupled to the shaft 2 is rotated.

On the other hand, air, gas, or the like is supplied through the gas injection port 62 of the external body 6. The injected gas is discharged through the outflow port 82 of the attachment flange 8 through the flow path groove 42, the through hole 41, the flow path 43 and the air hole 44.

In this discharge process, since the flow path groove 42 is formed long along the circumferential direction even if the inner body 4 is continuously rotated, the inflow of gas can be continuously performed without interruption.

On the other hand, when the shaft 2 is rotated, the transmitting unit 200 coupled to the inside of the shaft 2 is also rotated, and a signal is received from a sensor (not shown) provided at one side of the transmitting unit 200.

Therefore, the shaft 2 integrated with the transmission portion 200 is rotated, and the terminal block 7 integrally fixed to the outer peripheral surface of the shaft 2 is also rotated.

The power terminal 52 grounded at the concave portion 73 of the terminal block 7 rotated in this manner can always be held in the grounded state at the second ring member 72 with elasticity.

The state where the power source terminal 52 is grounded to the second ring member 72 can be maintained, so that the power supply to the transmission unit 200 can be stably maintained.
Since the bracket 54 is connected to the plate member 59 coupled to the outer body 6, the bracket 54 does not rotate.

Then, a signal is wirelessly transmitted to an external receiving unit 280 through the transmitting unit 200.

For example, the signal may be a signal for determining whether a defect is detected in the device for testing a PC.

Although the present invention has been described in connection with the above-mentioned preferred embodiments, it will be apparent to those skilled in the art that various modifications and variations can be made without departing from the spirit and scope of the invention, It is obvious that the claims fall within the scope of the claims.

2: shaft 4: inner body
6: External body 8: Attachment flange
22: flange 26:
27: Keyhole 42: Euro home
43: air passage 44: air hole
62: gas injection port 67: bearing seat part
68: Seal seal 69: Seal insert groove
82: outlet port 86; Incoming ball
100; Decelerator 200:

Claims

An outer body coupled to an outer side of the inner body and to which a gas is injected from the outer body;
A transmission unit coupled to an outer side of the inner body and coupled to an outer body to which gas is injected from the outside and a shaft to receive a signal from the outer sensor and to receive a signal from the transmission unit,
And a power terminal grounded to the terminal block is formed at one side of the outer body so that a signal is transmitted to the outside, and the terminal is connected to the terminal block at the time of rotation of the shaft, So that the ground state between the power terminals can be maintained,
The transmitting unit
A body coupled to the inside of the shaft, and a radiator formed at one side of the body and generating a low frequency signal,
A plurality of PCBs are formed inside the body,
A contact is formed on one side of the outer surface of the transmitter,
One end of a conductive wire is connected to the contact and the other end of the conductive wire is connected to a terminal block formed on an outer circumferential surface of the shaft to receive power,
And a fixing screw penetrating through the substrate and coupled to the shaft and the terminal block,
Wherein the substrate is provided with a ground nut which is in close contact with the outer surface, and the conductive wire is connected to one side of the ground nut.

The method according to claim 1,
Wherein the terminal block is formed on the outer circumferential surface of the shaft in a circumferential direction and is recessed.

3. The method of claim 2,
The power supply terminal is formed to be inclined in the tangential direction on the outer peripheral surface of the terminal block,
And the contact protrusions formed at one end are grounded to the terminal block.

The method according to claim 1,
And a bracket having a contact portion to which the other end of the power source terminal is connected and energized.

delete

The method according to claim 1,
Wherein an insulating film is formed on an outer circumferential surface of the fixing screw so as to form an insulating film.

The method according to claim 1,
The terminal block includes a first ring body formed of an insulator,
And a second ring member having a diameter smaller than that of the first ring member and formed of a conductor
The outer circumferential surface of the second ring body is recessed from the outer circumferential surface of the first ring body to form a concave portion,
And the power terminal is held in contact with the recessed portion.

The method according to claim 1,
And a fixing screw which penetrates through the substrate and is coupled to the shaft and the terminal block,
Wherein a ground nut connected to a conductive wire is closely attached to the substrate and the fixing screw is inserted through the ground nut.