KR20210007095A - Ball rectifying bearing - Google Patents

Abstract

The present invention relates to a bearing, and more specifically, a ball made of copper or a copper alloy is configured in a retainer and contacted with a copper electrode, so that the electricity of a fixed armature supplied from the outside is contacted with a brush so that the electric input line is not twisted. It relates to a ball rectifying bearing to be transmitted to the rotating armature, the housing; The first curved panel electrically connected to the first wire, the second curved panel electrically connected to the second wire, and the first curved panel and the second curved panel are insulated from each other to form a circular tube. A rod panel having an insulating piece installed in the housing; A conductive external retainer facing the rod panel and having a plurality of external through holes, a conductive internal retainer having a plurality of internal through-holes facing the external retainer and facing and communicating with the external through-hole, and the external through-hole A plurality of rotors including conductive balls installed between the outer retainer and the inner retainer so as to protrude through the hole and roll along the inner peripheral surface of the rod panel; And a rotating shaft provided to roll in the housing, and a rotating body including a drum made of insulating material installed in the center of the rod panel so as to surround and support the rotating shaft and surround a plurality of rotors in a circular shape.

Description

Ball rectifying bearing {BALL RECTIFYING BEARING}

The present invention relates to a bearing, and more specifically, a ball made of copper or a copper alloy is configured in a retainer and contacted with a copper electrode, so that the electricity of a fixed armature supplied from the outside is contacted with a brush so that the electric input line is not twisted. It relates to a ball rectifying bearing that is delivered to the rotating armature.

Conventionally, slip rings and electric brushes that supply electricity to a rotating body are a kind of electrical connectors that mediate current between the fixed armature and the rotating armature. Here, the slip ring performs the function of a rotary switch that allows current to flow between the fixed armature and the rotating armature or changes the direction of the current while preventing the wires from being twisted to a DC motor or an electric appliance that requires electricity while rotating. On the other hand, the electric brush is an electrical contact part forming the terminal of the armature, and makes electrical connection by directly contacting the commutator, which is a rotating conductive segment.

Conventional technologies such as electrical connectors will be described with reference to Korean Patent Registration No. 1315107 (announced date of October 7, 2013).

The slip ring, a kind of rotating armature connector, connects electrical signals or power while rotating. To this end, the slip ring has a structure in which a plurality of rotating electrodes 70 corresponding to a conductive segment come into contact with a fixed electrode 130 corresponding to an electrical contact to form an electrical connection.

To explain this in more detail, a plurality of rotating electrodes 70 are disposed around the rotating body 60 interlocking with the rotating shaft of the transmission device, and a plurality of fixed electrodes 130 are disposed around the rotating electrode 70. It is arranged to contact the rotating electrode 70 at regular intervals. As a result, the rotating electrode 70 rotating with the rotation of the rotating body 60 makes an electrical connection while contacting the fixed electrode 130 at regular intervals, through which power or electrical signals and data performed by the slip ring are Carry out transmission or rectification.

However, in the conventional slip ring, since the rotating electrode 70 and the fixed electrode 130 make surface contact in a sliding manner by a brush, the rotating electrode 70 and the rotating electrode 70 are in contact with each other in a sliding contact process by rotation of the rotating body 60. There is a problem in that frictional heat is generated due to friction between the fixed electrodes 130. Of course, since the frictional heat increases the driving temperature of the transmission device provided in the conventional slip ring, and the transmission device itself cannot be used in a high temperature environment, the transmission device to which the conventional slip ring can be applied is inevitably limited.

In addition, the surface contact between the rotating electrode 70 and the fixed electrode 130 by the brush causes abrasion due to friction between the rotating electrode 70 and the fixed electrode 130, and the worn rotating electrode 70 and the fixed electrode In the case where 130 is continuously used without replacement, all of the expensive slip ring itself may be damaged, and thus there is a hassle requiring periodic management of the brush part for the slip ring.

The conventional slip ring is a fixed body in which the rotating electrode 70 is fixed and the fixed electrode 130 is fixed in order to compensate for the rotational speed reduced by friction between the rotating electrode 70 and the fixed electrode 130. Although 110 was connected with a separate thrust bearing 10, the separate configuration of the thrust bearing 10 only minimizes the additional deceleration of the rotating body 60 connected to the fixture 110, and surface contact by the brush. There was a limit that could not make up for the rotational speed reduced by.

On the other hand, the brush, which is an electric connector between the stationary armature and the rotating armature, has minimized the contact area between the commutator and the electrical contact part, which is a conductive segment, so that it can work even in a transmission device for high-speed rotation. However, as the contact area became smaller, the wear rate of the electric contact portion increased, and thus, management of the electrical connector between the stationary armature and the rotating armature and replacement of parts were frequent. Consequently, the conventional brush has a problem of lowering the operating efficiency. In addition, there is a problem in that the supply of electricity by the conventional brush has a lot of contact resistance and noise, and the wear due to friction proceeds quickly, and the service life is short.

Prior Art Document 1. Patent Registration No. 10-1315107 (announced on October 7, 2013)

Accordingly, the present invention is to solve the above problems, and it is an object of the present invention to provide a ball rectifying bearing that minimizes wear and noise due to friction generated during rotation and extends the driving life.

In order to achieve the above object, the present invention,

housing;

The first curved panel electrically connected to the first wire, the second curved panel electrically connected to the second wire, and the first curved panel and the second curved panel are insulated from each other to form a circular tube. A rod panel having an insulating piece installed in the housing;

A conductive external retainer facing the rod panel and having a plurality of external through holes, a conductive internal retainer having a plurality of internal through-holes facing the external retainer and facing and communicating with the external through-hole, and the external through-hole A plurality of rotors including conductive balls installed between the outer retainer and the inner retainer so as to protrude through the hole and roll along the inner peripheral surface of the rod panel; And

A rotating body including a rotating shaft installed to roll in the housing, and an insulating material drum installed in the center of the rod panel so as to surround and support the rotating shaft and surround a plurality of rotors in a circular shape;

It is a ball rectifying bearing including a.

In the present invention, a ball made of a self-lubricating metal is mounted on a retainer, rotates along a ball guide configured on a copper electrode that receives electricity from the outside, and supplies the supplied electricity to an electrical appliance, thereby causing wear due to friction. And heat generation and noise can be drastically reduced.

In addition, there is an effect of remarkably increasing the energization efficiency and service life of the electric connector between the fixed electrode body and the rotating electrode body.

In addition, as an electric connector with a bearing structure, it can be used without restrictions in high-temperature and high-speed rotation environments, so motors, tidal power generators for deep seas, wind power generators, drones, tanks, automobiles, semiconductor ingot equipment, excavators for oil fields, operation machines for nuclear power plants, and surveillance cameras , Home appliances, military equipment, etc. has the effect that can be used in a variety of equipment.

1 is a diagram schematically showing a state in which a ball rectifying bearing according to the present invention is connected to a motor,
2 is a perspective view showing an embodiment of a ball rectifying bearing according to the present invention,
3 is an exploded perspective view of the ball rectifying bearing shown in FIG. 2,
4 is a front cross-sectional perspective view of the ball rectifying bearing shown in FIG. 2,
5 is a perspective view showing an energization state of the ball rectifying bearing shown in FIG. 2,
6 is a view showing a plan view of the ball rectifying bearing shown in FIG. 2.

The features and effects of the present invention described above will become apparent through the following detailed description in connection with the accompanying drawings, whereby those of ordinary skill in the technical field to which the present invention pertains can easily implement the technical idea of the present invention. There will be. Since the present invention can apply various changes and have various forms, specific embodiments will be illustrated in the drawings and described in detail in the text. However, this is not intended to limit the present invention to a specific disclosed form, and it should be understood to include all changes, equivalents, and substitutes included in the spirit and scope of the present invention. The terms used in the present application are only used to describe specific embodiments, and are not intended to limit the present invention.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

1 is a diagram schematically showing a state in which a ball rectifying bearing according to the present invention is connected to a motor.

Referring to FIG. 1, the ball rectifying bearing (B) of the present embodiment is a medium for applying current to an electric motor (M) such as a two-phase or three-phase, and at the same time, minimizes friction between the terminal and the terminal during energization.

To this end, the rotating shaft 610 of the ball rectifying bearing (B) is coaxially connected with the transmission shaft (A) of the electric motor (M), and the terminal portion 412 of the ball rectifying bearing (B) is connected to the electric motor (M). Each configured coil (C) is electrically connected. That is, the current applied from the first electric wire L1 is applied to one electrode of the corresponding coil C through the terminal part 412 and the conducting wire W. On the other hand, the other electrodes of the plurality of coils (C) are connected in parallel via the third wire (L3), so they are energized to the ball rectifying bearing (B) through the corresponding coil of the electric motor (M), so that the ball rectifying bearing (B) is A closed circuit is formed through the second wire L2. Eventually, the current applied from the first wire (L1) forms a closed circuit through the ball rectifying bearing (B), the electric motor (M), and the ball rectifying ever ring (B), through which the electric motor (M) is supplied. It rotates through the interlocking of the electric power and the built-in magnets (M1, M2).

For reference, the electric motor (M) is a magnetic body (160, 160') and a coil (142, 142, 160, 160') of the'rectifier bearing and a DC motor using the same' applied and registered by the applicant (Namseoul University Industry-Academic Cooperation Foundation). 142'), the description of the electric motor M of the present embodiment is omitted here.

FIG. 2 is a perspective view showing an embodiment of the ball rectifying bearing according to the present invention, FIG. 3 is an exploded perspective view of the ball rectifying bearing shown in FIG. 2, and FIG. 4 is a front cross-sectional view of the ball rectifying bearing shown in FIG. It is a perspective view, and FIG. 5 is a perspective view showing an energization state of the ball rectifying bearing shown in FIG. 2, and FIG. 6 is a plan view showing a plan view of the ball rectifying bearing shown in FIG. 2.

1 to 6, the housing 100; The first conductive curved panel 310 electrically connected to the first wire L1, the second conductive curved panel 310 ′ electrically connected to the second wire L2, and a first A rod panel 300 configured to connect the curved panel 310 and the second curved panel 310 ′ by insulating each other and having insulating pieces 320 and 320 ′ installed in the housing 100; A conductive external retainer 410 facing the load panel 300 and having a plurality of external through holes 411 formed therein, and a plurality of inner conductive external retainers 410 facing the external retainer 410 and facing and communicating with the external through holes 411 Installed between the outer retainer 410 and the inner retainer 420 so as to protrude through the outer through hole 411 and roll along the inner circumferential surface of the rod panel 300 with the conductive inner retainer 420 formed with the through hole 421 A plurality of rotors 400 in which the conductive balls 430 are configured; A rotating shaft 610 installed to roll in the housing 100, and a drum made of insulating material installed in the center of the rod panel 300 so as to surround and support the rotating shaft 610 and surround a plurality of rotors 400 in a circular shape. It includes; a rotating body 600 configured with 620.

The housing 100 is a case that accommodates and protects the components of the ball rectifying bearing B, and constitutes a circular bearing 110 that supports the rotating shaft 610 in a rollable manner. In this embodiment, the circular bearing 110 supports the lower end of the rotating shaft 610 in the housing 100. However, the circular bearing 110 is not limited to the illustrated configuration and structure, and if it is a configuration and structure in which the rotating shaft 610 can smoothly roll with low friction in the housing 100, it is within the scope of the following rights. Various modifications are implemented in

The load panel 300 includes a first conductive curved panel 310 electrically connected to the first wire L1, a second conductive curved panel 310 ′ electrically connected to the second wire L2, The first curved panel 310 and the second curved panel 310' are insulated and connected to each other to form a circular tube shape, and insulating pieces 320 and 320' installed in the housing 100 are formed. The first curved panel 310 and the second curved panel 310 ′ are composed of two to allow general direct current to flow, and the first wire L1 and the second wire L2 are each It is electrically connected. Since the rotor 400 including the ball 430 moving along the inner circumferential surface of the load panel 300 is installed inside the load panel 300, the load panel 300 forms a circular tube shape. In this embodiment, the first curved panel 310 and the second curved panel 310' are disposed to face each other, and are connected by insulating pieces 320 and 320'.

For reference, the load panel 300 further configures a third curved panel (not shown) in a three-phase electricity supply environment, and the first curved panel 310, the second curved panel 310', and the third curved panel Are arranged insulated from each other at a certain angle.

The first curved panel 310 and the second curved panel 310 ′ are made of a copper material or a copper alloy material to minimize electrical resistance, and the insulating pieces 320 and 320 ′ are made of a non-insulating material. When the material of the first curved panel 310 and the second curved panel 310' is described as an example, copper powder or copper alloy powder such as copper-silver, copper-cadnium, copper-chromium, copper-beryllium, copper- By filling and pressing one material selected from beryllium-cobalt, copper-tellurium, copper-zinc, copper-tin, copper-tin-graphite, copper-nickel, copper-silicon, copper-aluminum, and copper-lead into the mold. After shaping, it is produced by solidifying by heating. On the other hand, the insulating pieces 320 and 320 ′ may be made of Teflon made of an insulator material.

Meanwhile, a rail groove 301 for guiding the movement of the ball 430 is formed along the inner circumferential surface of the rod panel 1. Therefore, the ball 430 of the mover 400 is engaged with the rail groove 301 and rotates along the rail groove 301.

The rotor 400 faces the rod panel 300 and has a conductive outer retainer 410 having a plurality of outer through holes 411 formed thereon, and the outer through hole 411 faces and bonds to the outer retainer 410. The conductive inner retainer 420 having a plurality of inner through-holes 421 facing and communicating with each other, and the outer retainer 410 and the inner side protruding through the outer through-hole 411 and rolling along the inner circumferential surface of the rod panel 300 Conductive balls 430 installed between the retainers 420 are configured. The outer retainer 410 and the inner retainer 420 have one or more outer through holes 411 and inner through holes 421, respectively, and the outer through holes 411 and the inner through holes 421 are arranged in communication with each other. do. On the other hand, the ball 430 has one side protruding through the external through-hole 411 and engaged with the rail groove 301 of the rod panel 300, and the other side of the ball 430 protrudes through the internal through-hole 421 do. The ball 430 configured in this way is installed through compression of the outer retainer 410 and the inner retainer 420, and through this, the ball 430 rolls in position and moves along the rod panel 300. For reference, since the inner retainer 420 has a sufficient thickness, a separate inner through hole 421 may not be formed, and thus the other side of the ball 430 may not be exposed through the inner retainer 420 May be. However, it is preferable that the other side of the ball 430 is exposed through the inner through hole 421 of the inner retainer 420 so that the contact surface with the inner retainer 420 is minimized.

The outer retainer 410, the inner retainer 420, and the ball 430 are made of a conductive material, so that the current applied to the first curved panel 310 through the first wire L1 is applied to the first curved panel 310. The contacted ball 430 is energized. As the number of balls 430 in contact with the first and second curved panels 310 and 310' increases, the contact range between the rod panel 300 and the rotor 400 increases, so that the efficiency of the electric current increases.

For reference, the outer retainer 410, the inner retainer 420 and the ball 430 are copper or copper alloys such as copper-silver, copper-cadnium, copper-chromium, copper-beryllium, copper-beryllium-cobalt, copper- It can be made of one selected from tellurium, copper-zinc, copper-tin, copper-tin-graphite, copper-nickel, copper-silicon, copper-aluminum, copper-lead, and copper-graphite.

The rotating body 600 includes a rotating shaft 610 installed to roll in the housing 100 and a central portion of the rod panel 300 so as to surround and support the rotating shaft 610 and surround the plurality of rotors 400 in a circular shape. It includes a drum 620 of insulating material installed on. The rotating shaft 610 is interlocked with the transmission shaft A of the electric motor 600. Therefore, the rotational force of the electric motor 600 is transmitted to the rotating shaft 610, through which the rotating body 600 rotates and moves the plurality of rotors 400 along the inner circumferential surface of the load panel 300. Since the drum 620 is fixed such that a plurality of rotors 400 are disposed along the circumferential surface, the rotor 400 faces the inner circumferential surface of the rod panel 300, respectively, as shown in FIG. 6.

Meanwhile, a plurality of separation panels 630 are formed to protrude along the circumferential surface of the drum 610 so as to partition between the rotors 400 disposed in a rectangular shape along the circumference of the drum 610. That is, the separation panel 630 is disposed between the rotors 400 adjacent to each other to partition. In particular, since the separation panel 630 is an insulating material such as the drum 610, electrical connection between the rotors 400 is blocked.

For reference, in this embodiment, the stepped 621 is formed at the upper and lower ends of the drum 620, respectively, and the upper end 422 and the lower end of the inner retainer 420 are formed to be bent toward the stepped 621, respectively. The upper end 422, the lower end and the stepped 621 formed in this way are disposed to face each other, and the upper end 422, the lower end and the stepped 621 are fixed to each other through fastening means such as rivets BL. Since the drum 620 is an insulating material, even if the conductive rotor 400 contacts the drum 620, each of the rotors 400 is disconnected.

When a current is applied to the first curved panel 310 of the load panel 300 as shown in FIG. 5, the ball rectifying bearing (B) of the present embodiment, which constitutes the above-described configuration and structure, is energized to the contacted ball 430 , Output through the terminal unit 412 through at least one selected from the external retainer 410 and the internal retainer 420. Of course, the current output from the electric motor M is energized to the second curved panel 310' located at the other end of the load panel 300 through another rotor to form a closed circuit, through which the electric motor M is continuously powered. And rotates.

Another embodiment of the ball rectifying bearing (B) further includes a magnetizing panel 200 surrounding the circumference of the rod panel 300 in the housing 100 so that a plurality of them are insulated from each other to face each other. In addition, it further includes a magnet 500 installed in the rotor 400 and applying a magnetic force to the magnetizable panel 200 so that the ball 430 is in close contact with the rod panel 300. In more detail, the plurality of magnetizable panels 200 are made of a magnetic material such as iron, and are installed in the housing 100 so as to surround the rod panel 300. At this time, since the first curved panel 310 and the second curved panel 310' of the load panel 300 are insulated from each other, the magnetizable panel 200 directly in contact with the load panel 300 is The panels 310 and 310' are mutually insulated so as not to conduct electricity. Therefore, the magnetizable panel 200 of the ball rectifying bearing (B) of the present embodiment is composed of a multiple of 2 in a two-phase electricity supply environment and a multiple of 3 in a three-phase electricity supply environment, and a plurality of magnetization panels are mutually at a certain angle. Is placed insulated. Therefore, since the magnetizable panel 200 of the present embodiment is a two-phase electricity supply environment, the first panel 210 and the second panel 220 are installed in the housing 100 so as to be insulated from each other, as shown in FIG. 210 is disposed so as to contact only the first curved panel 310, and the second panel 220 is disposed so as to contact only the second curved panel 310 ′.

Meanwhile, since the magnet 500 installed in the rotor 400 applies a magnetic force to the magnetizable panel 200, the rotor 400 is compressed toward the rod panel 300 by the magnetic force. Eventually, the ball 430 installed in the rotor 400 is in close contact with the inner circumferential surface of the rod panel 300, through which the first curved panel 310 and the second curved panel 310' of the rod panel 300 The applied current is energized to the terminal portion 412 through the ball 430 and is efficiently applied to the electric motor M.

In this embodiment, the magnet 500 is installed at the upper end 422 and the lower end of the inner retainer 420, respectively, so that the entire rotor 400 is in close contact with the rod panel 300 with a constant external force.

As described above, the ball rectifying bearing (B) of this embodiment applies electricity to the electric motor (M) that requires electricity while the ball 430 rolls when current is applied from the outside, It has an electrical connecting function that reduces wear and noise caused by friction and extends its service life.

In the detailed description of the present invention described above, it has been described with reference to preferred embodiments of the present invention, but those skilled in the art or those of ordinary skill in the relevant technical field, the spirit of the present invention described in the claims to be described later. And it will be understood that various modifications and changes can be made to the present invention within a range not departing from the technical field.

100; Housing 110; Circular bearing 200; Magnetic panel
210; First panel 220; Second panel 300; Loading panel
310; A first curved panel 301; Rail groove 310'; 2nd curved panel
320, 320'; Insulating piece 400; Rotor 410; External retainer
411; External through-hole 412; Terminal portion 420; Inner retainer
421; Inner through hole 422; Upper part 430; ball
500; Magnet 600; Rotating body 610; Rotating shaft
620; Drum 621; Step 630; Separation panel
A; Transmission shaft B; Ball rectifying bearing L1; 1st wire
L2; Second wire L3; Third wire W; Electric wire

Claims (9)

housing;
The first curved panel electrically connected to the first wire, the second curved panel electrically connected to the second wire, and the first curved panel and the second curved panel are insulated from each other to form a circular tube. A rod panel having an insulating piece installed in the housing;
A conductive external retainer facing the rod panel and having a plurality of external through holes, a conductive internal retainer having a plurality of internal through-holes facing the external retainer and facing and communicating with the external through-hole, and the external through-hole A plurality of rotors including conductive balls installed between the outer retainer and the inner retainer so as to protrude through the hole and roll along the inner peripheral surface of the rod panel; And
A rotating body including a rotating shaft installed to roll in the housing, and an insulating material drum installed in the center of the rod panel so as to surround and support the rotating shaft and surround a plurality of rotors in a circular shape;
Ball rectifying bearing comprising a. The method of claim 1,
A ball rectifying bearing, characterized in that, a conductive terminal portion is formed on at least one selected from an outer retainer and an inner retainer of the rotor so that the rotor is electrically connected to each of a plurality of coils forming an electrical parallel connection structure in the electric motor. . The method of claim 1,
A plurality of magnetizable panels surrounding the circumference of the rod panel in the housing and disposed insulated from each other; And
A magnet installed in the rotor and applying a magnetic force to the magnetizable panel so that the ball is in close contact with the rod panel;
Ball rectifying bearing, characterized in that it further comprises. The method of claim 1,
Steps are formed at the top and bottom of the drum, respectively; Ball rectifying bearing, characterized in that; forming the upper end and the lower end of the inner retainer to be bent toward the stepped, respectively. The method of claim 4,
The magnet is a ball rectifying bearing, characterized in that; each internally installed at the upper end and the lower end of the inner retainer. The method of claim 1,
Ball rectifying bearing, characterized in that; forming a rail groove for guiding the movement of the ball along the inner circumferential surface of the rod panel. The method of claim 1, wherein the rotating body,
A separation panel formed to protrude along a circumferential surface of the drum to partition between the rotors disposed in a rectangular shape along the periphery of the drum;
Ball rectifying bearing, characterized in that it further comprises. The method of claim 1,
The rod panel further comprises a third curved panel in a three-phase electricity supply environment, and the first curved panel, the second curved panel, and the third curved panel are insulated from each other at a predetermined angle; Commutation bearing. The method of claim 3,
The magnetizable panel is composed of a multiple of 2 in a two-phase electricity supply environment and a multiple of 3 in a three-phase electricity supply environment, and a plurality of magnetization panels are insulated from each other at a predetermined angle; a ball rectifying bearing, characterized in that .

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