AU2016201226A1

AU2016201226A1 - Rotation support apparatus

Info

Publication number: AU2016201226A1
Application number: AU2016201226A
Authority: AU
Inventors: Moon Sig Kang; Kem Suk SONG
Original assignee: Paru Co Ltd
Current assignee: Paru Co Ltd
Priority date: 2015-08-19
Filing date: 2016-01-19
Publication date: 2017-03-09
Anticipated expiration: 2036-01-19
Also published as: AU2016201226B2; WO2016076682A3; WO2016076682A2

Abstract

Disclosed herein is a rotation support apparatus. The rotation support apparatus includes: an external casing; a 5 rotation body rotatably provided inside the external casing, the rotation body being configured such that a rotary shaft is inserted into the rotation body, and the rotation body is rotated in conjunction with the rotary shaft when the rotary shaft rotates; and a plurality of rolling balls provided in a 10 contact portion between the external casing and the rotation body or a plurality of grooves for storing lubricant in the plurality of grooves provided in the outer circumferential surface of the rotation body.

Description

DESCRIPTION

ROTATION SUPPORT APPARATUS

Technical Field

The present invention generally relates to a rotation support apparatus. More particularly, the present invention relates to a rotation support apparatus in which a frictional force generated between a rotation body and an external casing can be decreased and the rotation body can be smoothly rotated by restricting substantial contact between the rotation body and the external casing, and manufacturing cost can be decreased and the apparatus can be easily assembled in such a way as to utilize a simpler structure than the related art.

Background Art

In general, a bearing performs a role in fixing a rotary shaft of a machine to a predetermined location and in rotating the rotary shaft while supporting a weight of the rotary shaft and a weight loaded on the rotary shaft. A rotation support apparatus supporting rotation of the rotary shaft, for example, includes an external casing constituting an appearance of the rotation support apparatus and a rotation body rotatably provided inside the external casing. i

At present, a technology, in which a separate bearing is provided between an external casing and a rotation body, is used so that the rotation body is smoothly rotated inside the external casing.

In this way, however, when the separate bearing is provided between the external casing and the rotation body, it is problematic in that an increase in manufacturing cost and. inconvenience of assembling the separate bearing may be caused by adding the separate bearing.

Accordingly, the applicant of the present invention has proposed an apparatus in which: a rotation body may be smoothly rotated in such a way as to utilise a simpler structure than the related art without providing a separate bearing between an external casing and the rotation body; a frictional force between the external casing and the rotation body may be decreased by decreasing a contact area therebetween; manufacturing cost may be decreased; and the apparatus may be easily assembled.

Disclosure Technical Problem

Accordingly, the present invention has been made keeping in mind the above problems occurring in the related art, and the present invention is intended to propose a rotation support apparatus in which; a frictional force generated between a rotation body and an external casing can be decreased and the rotation body can be smoothly rotated by restricting substantial contact between the rotation body and the external, casing; and manufacturing cost can be decreased and the apparatus can be easily assembled in such a way as to utilize a simpler structure than the related art.

Technical Solution

In order to achieve the above object, according to one aspect of the present invention, there is provided a rotation support apparatus including: a fixed casing; a lubricating rotation body rotatably provided inside the fixed casing, the lubricating rotation body being configured such that a rotary shaft is inserted into the lubricating rotation body, and the lubricating rotation body is rotated in conjunction with the rotary shaft when the rotary shaft rotates; and a plurality of grooves formed on a surface of the lubricating rotation body for storing lubricant in the plurality of grooves.

According to another aspect of the present invention, there is provided a rotation support apparatus including: an external casing; a rotation body rotatably provided inside the external casing, the rotation body being configured such that a rotary shaft is inserted into the rotation body, and the rotation body is rotated in conjunction with the rotary shaft when the rotary shaft rotates; and a plurality of rolling balls 3 provided in a contact portion between the external casing and the rotation body.

Advantageous Effects A first rotation support apparatus according to the present invention having the above-described characteristics is advantageous in that pressure grooves are formed in the inner circumferential surface of a pressure casing by being depressed, and -when an upper fixed casing and a lower fixed casing are coupled to each other, the pressure casing presses rubber packings, and thus leakage of lubricant can be prevented by sealing the lubricant in a plurality of grooves of a lubricating rotation body.

Furthermore, rain 'water permeating from the outside is blocked by pressure from the rubber packings, and thus the rotation support apparatus can be prevented from corroding.

Alternatively, a frictional force, generated between a rotation body and an external casing can be decreased and the rotation body can be smoothly rotated by providing a plurality of rolling balls on an outer surface of the rotation body so as to prevent the rotation body and the external casing from coming into direct contact with each other. Accordingly, durability of an entire rotation support apparatus can. be improved. which a plurality of

Furthermore, a simple structure. 4 rolling balls is provided between the external casing and the rotation body instead of providing a separate bearing, is used, and thus manufacturing cost can be decreased and the apparatus can be easily assembled.

Furthermore, a coupling protrusion and a coupling groove are provided in each of a first rotation body and a second rotation body, and thus the first rotation body and the second rotation body can be promptly and correspondingly coupled to each other.

Description of Drawings FIG. 1 is a perspective view illustrating a rotation support apparatus according to a first embodiment of the present invention; FIG. 2 is an exploded perspective view of FIG. 1; FIG. 3 is a perspective view illustrating a first rotation body of the rotation support apparatus according to the first embodiment of the present invention; FIG. 4 is a perspective view illustrating a second rotation body of the rotation support apparatus according to the first embodiment of the present invention; FIG. 5 is a perspective view illustrating a rotation support apparatus according to a second embodiment of the present invention; FIG. 6 is an exploded perspective view of FIG. 5; 5 FIG. 7 is a sectional perspective view taken along line A-A of FIG. 5; FIG. 8 is a perspective view illustrating a first example use of the rotation support apparatuses according to the present invention; and FIG. 9 is a perspective view illustrating a second example use of the rotation support apparatuses according to the present invention.

Mode for Invention

Hereinbeiow, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, it should be understood that the embodiment of the present, invention may be changed to a variety of embodiments and the scope and spirit of the present invention are not limited to the embodiment. described nereinbelow. The embodiment of the present invention described hereinbeiow is provided for allowing those skilled in the art to more clearly comprehend the present invention. Therefore, it should be understood that the shape and size of the elements shown, in the drawings may be exaggeratedly drawn to provide an easily understood description of the structure of the present invention. The same reference numerals refer to similar elements throughout. In the following description, it is to be noted that, when the functions of conventional elements and the 6 detailed description of elements related with the present invention may make the gist of the present invention unclear, a detailed description of those elements will be omitted.

As shown in FIGS. 8 and 9, rotation support apparatuses 1 and 2 according to embodiments of the present invention are coupled to support pipes 400 fixed to the ground. Further, the rotation support apparatuses 1 and 2 are coupled to and are rotated in conjunction with a rotary shaft 600 that rotates a solar panel 20. Thus, the rotation support apparatuses 1 and 2 may be used to control a rotational angle of the solar panel 20 by controlling rotation of the rotary shaft 600.

Accordingly, the rotation support apparatuses 1 and 2 are configured such that when the rotary shaft 600 coupled to and rotated in conjunction with the rotation support apparatuses 1 and 2 rotates, a frictional force generated between components supporting the rotation of the rotary shaft 600 is minimized, and overall durability is increased.

Hereihbelow, the rotation support apparatus 1 according to the present invention is described with reference to a first embodiment.. FIG. 1 is a perspective view illustrating the rotation support apparatus 1 according to the first embodiment of the present invention, FIG, 2 is an exploded perspective view of FIG. 1, FIG. 3 is a perspective view illustrating a first rotation body 210 of the rotation support apparatus according 7 to the first embodiment of the present invention, and FIG. 4 is a perspective view illustrating a second rotation body 220 of the rotation support apparatus according to the first embodiment of the present invention.

As shown in FIGS. 1 and 2, the rotation support apparatus 1 according to the first embodiment of the present invention includes: an external casing 100; a rotation body 200 rotatably provided inside the external casing 100; and a plurality of rolling balls provided in a contact portion between the external casing 100 and the rotation body 200.

First of all, the external casing 100 is exposed to the outside, and includes first and second external casings 110 and 120, which may be coupled to and separated from each other.

More specifically, flange structures are formed in the first and second external casings 110 and 120 respectively, and the flanges may be coupled to each other by using bolts. In the embodiment of the present invention, since the first and second external casings 110 and 120 may be separated from each other, it is advantageous in that the rotation body 200 disposed therein may be easily replaced, when the rotation body is faulty or defective.

The first and second external casings 110 and 120 are formed in approximately semicircular shapes respectively, and the rotation body 200 is rotatably provided therein.

In the embodiment of the present invention, a plurality of 8 coupling pieces 500 is provided on any one of the first and second external casings 110 and 120 to couple the support pipe 400 to any one of the first and second external casings 110 and 120 in a state in which the coupling pieces partially cover an end portion of the support pipe. For example, as shown in the drawings, a pair of coupling pieces 500 is provided on the second external casing 120 in a being spaced apart from each other, and the pair of coupling pieces 500 may be coupled to the support pipe 400 by using nuts and bolts.

More specifically, bolt holes are formed in the pair of coupling pieces 500 and the support pipe 400 respectively. Further, the plurality of bolt holes is formed especially in the support pipe 400 in a state of being apart from each other along a longitudinal direction of the support pipe 400. Thus, a coupled location in which the external casing 100 is coupled to the support pipe 400 may be controlled by an operator by appropriately adjusting locations of the bolt holes formed in the coupling pieces 500 to locations of the bolt holes formed in the support pipe 400. In this case, the support pipe 400 is fixed to the ground, and as described above, an installation height of the external casing 100 from the ground may be effectively controlled by adjusting the locations of the bolt holes formed between the coupling pieces 500 and the support pipe 400.

The rotation body 200 is rotatably provided inside the 9 external casing 100, and the rotation body 200 is configured such that the rotary shaft 600 is inserted into the rotation body. Thus, the rotation body 200 is rotated in conjunction with the rotary shaft 600 when the rotary shaft rotates.

In the embodiment of the present invention, the rotation body 200 includes the first and second rotation bodies 210 and 220, which are coupled to and separated from each other. Further, the rotation body 200, in a state in which the first and second rotation bodies 210 and 220 are coupled to each other, is formed in an overall spherical shape, and is rotatably provided inside the external casing 100.

In addition, an approximately quadrangular-shaped hole is formed through the rotation body 200, and the rotary shaft 600 formed in a quadrangular section shape is inserted into the approximately quadrangular-shaped hole. Accordingly, when the rotary shaft 600 rotates, the rotation body 200 is rotated in conjunction with the rotary shaft 600. In this case, for example, the rotary shaft 600 may be connected to a lower portion of the solar panel 20 supporting a solar cell panel among single axis type solar generation devices, and thus when rotation of the rotary shaft 600 is controlled depending on a movement of a solar position, rotation of the solar panel 20 is controlled as well.

Meanwhile, in the embodiment of the present invention, inner surfaces of the first and second external casings 110 and 10 120 are formed in hemispherical shapes respectively, and the rotation body 200 is formed in a spherical shape as well. Thus, when the rotation body 200 is disposed inside the external casing 100, the first and second rotation bodies 210 and 220 may be prevented from being separated from the external casing 100 in a side direction of the first and second rotation bodies 210 and 220.

As shown in FIGS. 2 to 4, a coupling protrusion and a coupling groove may be formed in the first rotation body 210 and the second rotation body 220. For example, a plurality of coupling protrusions 230 is provided in the first rotation body 210, and a plurality of coupling recesses 240 is provided in the second rotation body 220 to insert the plurality of coupling protrusions 230 into the plurality of coiipl .ing recesses 240, In this way, the first rotation body 210 and the second rotation body 220 ma.y be promptly and correspondingly coupled to each other by using the coupling protrusions 230 and the coupling recesses 240.

In. the embodiment of the present invention, for example, the rotation body 200 may be made of an engineering plastic material having a predetermined strength, and thus, when, the rotary shaft 600 rotates, wear of a contact portion bringing the rotation body 200 into contact with the rotary shaft 600 may be minimized. Further, the engineering plastic material is made of a lighter material than a metal material, which is il advantageous in transportation and installation by decreasing an entire weight of the apparatus.

Thereafter, the plurality of rolling balls 300 is provided in a contact portion between the external casing 100 and the rotation body 200, and a frictional force generated between the external casing 100 and the rotation body 200 is minimized, thereby improving rolling performance. In addition, the rolling balls 300 formed on an outer surface of the rotation body 200 are formed in approximately hemispherical shapes, and come into point contact with an inner surface of the external casing 100. Thus, as described above, the frictional force is minimized, thereby improving the rolling performance.

In the embodiment of the present invention, the plurality of rolling balls 300 may be inserted into and held in the inner surface of the external casing 100 or the outer surface of the rotation body 200. Hereinbelow, in the description and the drawings of the present invention, the plurality of rolling balls is described in a state in which the plurality of rolling balls is provided on the outer surface of the rotation body 200.

The plurality of rolling balls 300 is inserted into the outer1 surface of the rotation body 200, and parts of the rolling balls 300 protrude from the outer surface of the rotation body 200. Thus, the parts of the rolling balls 300 come into contact with the inner surface of the external casing 12 100, That is, the plurality of rolling balls 300 come into direct contact with the inner surface of the external casing 100 without bringing the outer surface of the rotation body 200 into direct contact with the inner surface of the external casing 100.

Accordingly, in the present invention, the plurality of rolling balls 300 comes into contact with the external casing 100 without bringing the outer surface of the rotation body 200 into direct contact with the inner surface of the external casing 1,00. Thus, the frictional force may be decreased when rotating by decreasing a substantial contact area between a substantially rotating portion and a portion supporting rotation. Further, the rolling performance may be improved, thereby more effectively rotating.

In the embodiment of the present invention, the plurality of rolling balls 300 may be forcibly inserted into grooves for the plurality of rolling balls, which are formed on the outer surface of the rotation body 200, or may be inserted to be freely rotated into the grooves for the plurality of rolling balls. In the latter, when the rotation body 200 rotates, it is advantageous in that the rotation body 200 is more effectively rotated inside the external casing 100.

The plurality of rolling balls 300 is provided in a state of being spaced apart from each other at predetermined regular intervals on the overall outer surface of the rotation body 200. 13

Accordingly, regaxdless of a rotation angle of the rotation body 200, the rotation body 200 may be smoothly rotated by decreasing the frictional force as described above. That is, the rotation body 200 may be smoothly rotated within a full 350 degree range.

In the embodiment of the present invention, the plurality of rolling balls 300 may be made of an engineering plastic material or a metal material that has a predetermined strength. Accordingly, when the rotation body 200 is repeatedly rotated for a long period, a decrease in durability of the plurality of rolling balls, which is caused by contact with the outer surface of the external casing 100, is more effectively prevented from occurring.

Hereinbelow, a rotation support apparatus 2 according to a second embodiment of the present invention is described with reference to FIGS. 5 to 7. FIG. 5 is a perspective view of the rotation support apparatus 2 according to the second embodiment of the present invention, FIG. 6 is an exploded perspective view of FIG. 5, and FIG. 7 is a sectional perspective view taken along line Ά-A of FIG. 5.

As shown in FIG. 5, the rotation support, apparatus 2 includes: a tixed casing 700; a lubricating rotation body 800 located inside the fixed casing 700, and rotated in conjunction with the fixed casing 700; a pressure casing 750 located 14 between the fixed casing 700 and the lubricating rotation body-800, the pressure casing being fastened to the fixed casing 700, and being configured to prevent the lubricating rotation body 800 from being separated; and a rubber packing 850 (shown in FIG. 6) configured to press the lubricating rotation body 800 by means of the pressure casing 750.

In tnis case, the rotary shaft 600 formed in a polygonal bar shape is inserted into the lubricating rotation body 800, and a coupling hole 830, formed in a shape corresponding to the polygonal bar shape of the rotary shaft 600, is formed inside the lubricating rotation body 800. Meanwhile, in the present embodiment, the rotary shaft 600 is formed in a quadrangular bar shape, and the coupling hole 830 is formed in a shape corresponding to the quadrangular bar shape of the rotary shaft 600 as well. Accordingly, the rotary shaft 600 may be rotated in conjunction with the lubricating rotation body 800.

Furthermore, as shown in FIG. 6, the fixed casing 700 exposed to the outside to protect the rotation support apparatus 2 includes an upper fixed casing 710 and a lower fixed casing 720, which, are coupled to and separated from each other.

More specifically, as shown in FIG. 7, flange structures are formed in first ends of the upper fixed casing 710 and the lower fixed casing 720, and the flanges may be coupled to each other by using bolts. Further, the upper fixed casing 710 and 13 the lower fixed casing 720 may be separated from each other. Thus, it is advantageous in that the pressure casing 750, the lubricating rotation body 800, and the rubber packing 850, which are disposed inside the tapper fixed casing 710 and the lower fixed casing 720, may be easily replaced.

It is desirable that the upper fixed casing 710 and the lower fixed casing 720 are respectively formed in semicircle shapes to cover the outer circumferential surface of the lubricating rotation body 800, which will be described below.

Furthermore, coupling pieces 721 coupled to an end portion of a support pipe 400 are provided in any one of the upper fixed casing 710 and the lower fixed casing 720. Accordingly, the coupling pieces 721 are coupled and fixed to the support pipe 400 by using a nut and a bolt.

The lubricating rotation body 800 is rotatably provided inside the fixed casing 700 and is configured such that the rotary shaft 600 may be inserted into the lubricating rotation body 800. Thus, when the rotary shaft 600 rotates, the lubricating rotation body 800 is rotated in conjunction with the rotary shaft 600.

In the present embodiment, the lubricating rotation body 800 includes an upper lubricating rotation body 810 and a lower lubricating rotation body 820 that are coupled to and separated from each other. Further, the lubricating rotation body 800, in a state in which the upper lubricating rotation body 810 and 16 the lower lubricating rotation body 820 are coupled other, is formed in an overall spherical shape, and is rotatably disposed inside the fixed casing 700. to each

Furthermore, as described above, when the upper 5 lubricating rotation body 810 and the lower lubricating rotation body 820 are coupled to each other, the insides of the upper lubricating rotation body 810 and the lower lubricating rotation body 820 are depressed so as to cover the rotary shaft 600. Thus, the coupling hole 830 is formed inside the 10 lubricating rotation body 800.

In this case, in the present embodiment, the lubricating rotation body 800 may be smoothly rotated inside the pressure casing 750 by using lubricant. For this purpose, a plurality of grooves 811, in which the plurality of grooves is depressed 15 at. predetermined sizes and the lubricant may be located, is formed on the outer circumferential surface of the lubricating rotation body 800. Furthermore, it is desirable that the plurality of grooves 811 is provided in a state of being spaced apart from each other at predetermined regular intervals on the 20 overall outer circumferential surface of the lubricating rotation body 800.

Accordingly, when the lubricating rotation body 800 rotates inside the pressure casing 750, the frictional force generated between the lubricating rotation body and the 25 pressure casing is decreased, or the wear generated between the 17 lubricating rotation body and the pressure casing is prevented. In this case, grease may be used as lubricant.

Furthermore, the pressure casing 750 covering the lubricating rotation body 800 includes an upper pressure casing 760 and a lower pressure casing 770 that are coupled to and separated from each other. In the sa.me manner, the upper pressure casing 760 and the lower pressure casing 770, which are formed in an overall spherical shape in a state of being coupled *co each other, are fixed inside the fixed casing 700.

More specifically, a fixing protrusion 761 is formed on a first side of the pressure casing 750, and a fixing hole 711 is formed through the fixed casing 700 at a location corresponding to a location of the fixing protrusion 761. Thus, the pressure casing 750 is fixed to the fixed casing 700 by fitting the fixing protrusion 761 into the fixing hole 711.

Furthermore, the fixing protrusion 761 is provided with a hole that is formed through the fixing protrusion so that the lubricant consumed by using the rotation support apparatus 2 for a long period may be supplied via the hole. More specifically, the fixing protrusion 761 with the hole formed through the fixing protrusion is formed at a location corresponding to a location of each of the plurality of grooves 811. Further, when the lubricant is supplied via the fixing protrusion 761 by manually rotating the rotary shaft 600, the lubricating rotation body 800 rotates as well. Thus, the 18 lubricant may uniformly supplied over the plurality of grooves 811.

Furthermore, when supply of the lubricant is completed, the fixing protrusion 761 is closed with a stopper (not shown in tiie drawings) , and thus lubricant may be prevented from leaking to the outside of the lubricating rotation body 800.

Furthermore, as shown in FIG. 7, the rubber packing 850 is provided as a pair of rubber packings and comes into surface contact with the outer circumferential surface of the lubricating rotation body 800 at locations outside the plurality of grooves 811, thereby preventing leakage of the lubricant in the plurality of grooves 811.

Furthermore, pressure grooves 762 are formed in the inner circumferential surface of the pressure casing 750 by being depressed at locations corresponding to locations of the pair of rubber packings 850, thereby allowing first sides of the pair of rubber packings 850 to be inserted into the pressure grooves. Thus, overall, when the upper fixed casing 710 and the lower fixed casing 720 are coupled to each other, the pressure casing 750 presses the rubber packings 850, and the lubricant located in the grooves 811 is more effectively sealed, thereby the leakage is prevented.

In addition, rain water permeating from the outside is blocked by pressure from the rubber packings 850, and thus the rotation support apparatus 2 may be prevented from corroding. 19

Furthermore, grooved storage portions 763 may be formed in the inner circumferential surface of the pressure casing 750 to store an additional amount of lubricant in a contact portion coming into contact with each of the plurality of grooves 811. In this case, the grooved storage portions 763 are formed in continually grooved shapes in the inner circumferential surface of the pressure casing 750, and when the lubricating rotation body 800 rotates, the grooved storage portions 763 may function to uniformly disperse lubricant located in specific one of the grooves 811 to the other grooves 811.

Meanwhile, since the pressure casing 750 includes the upper pressure casing 760 and the lower pressure casing 770, it may be appreciated that the fixing protrusion 761, the pressure grooves 762, and the grooved storage portions 763 are formed in the upper pressure casing 760 and the lower pressure casing 770 .

Although the preferred embodiments of the rotation support apparatuses according to the present invention have been disclosed for illustrative purposes, those skilled in the art will appreciate that the present invention, however, is not limited thereto, and various modifications, additions and substitutions are. possible, without departing from the scope and spirit of the invention as disclosed in the accompanying claims. Accordingly, it will be appreciated that the present invention is not limited to the embodiments of the present 20 invent ion. Therefore, the spirit and scope of the resent invention should be defined by the technical spirit of the appended claims. Furthermore, it should be understood that the present invention includes various modifications, additions and substitutions within the spirit and scope of the present invention.

Claims

1. A rotation support apparatus comprising: a fixed casing (700) ; a lubricating rotation body (800) located inside the fixed casing (700), the lubricating rotation body being configured to have a coupling hole (830) for inserting a rotary shaft (600) into the coupling hole, being rotated in conjunction with the rotary shaft (600), and being configured to have a plurality of grooves (811) for storing lubricant in the plurality of grooves; a pressure casing (750) located between the fixed casing (700) and the lubricating rotation body (800), the pressure casing being fastened to the fixed casing (700), and being configured to prevent the lubricating rotation body (800) from being separated; and a rubber packing (850) configured to press the lubricating rotation body (800) by means of the pressure casing (750) to prevent leakage of the lubricant from the lubrica.ting rotation body (800) .

2. The rotation support apparatus of claim 1, wherein the pressure casing (750) is fixed to the fixed casing (700), a fixing protrusion (761) is formed on a first side of the pressure casing (750), and a fixing hole (711) is formed through the fixed casing (700) at; a location corresponding to a location of the fixing protrusion (7 61).

3. The rotation support apparatus of claim 2, wherein the fixing protrusion (761) is formed at a location corresponding to a location of each of the plurality of grooves (811) of the lubricating rotation body (800), with a hole formed through the fixing protrusion so that the lubricant is supplied to the plurality of grooves (811) via the hole.

4. The rotation support apparatus of claim 1, wherein the lubricating rotation body (800) includes an upper lubricating rotation body (810) and a lower lubricating rotation body (820) respectively formed in semicircle shapes that are coupled to and separated from each other, the pressure casing (750) includes an upper pressure casing (760) and a lower pressure casing (770) respectively formed in semicircle shapes that are coupled to and separated from, each other and which cover the lubricating rotation body (800), and the fixed casing (700) includes an upper fixed casing (710) and a lower fixed casing {120) respectively formed in semicircxe snapes that are coupled to and separated from each other and which cover the pressure casing (750), whereby the pressure casing (750), the lubricating rotation body (800), and the rubber packing (850) are easily replaced.

5. The rotation support apparatus of claim 1, wherein the rubber packing (850) is provided as a pair of rubber packings that come into surface contact with an outer circumferential surface of the lubricating rotation body (800) at locations outside the plurality of grooves (811), and pressure grooves (762) are formed in an inner circumferential surface of the pressure casing (750) by being depressed at locations corresponding to locations of the pair of rubber packings (850), thereby allowing first sides of the pair of rubber packings (850) to be inserted into the pressure grooves, and sealing the lubricant in the plurality of grooves (811) .

6. The rotation support apparatus of claim 4, wherein a grooved storage portion (763) is formed in an inner circumferential surface of the pressure casing (750) to store an additional amount of lubricant in a contact portion coming into contact with each of the plurality of grooves (811) .

7. A rotation support apparatus comprising: an external casing (100) ; a rotation body (200) rotatably provided inside the external casing (100), the rotation body being configured such that a rotary shaft (600) is inserted into the rotation body, and the rotation body is rotated in conjunction with the rotary shaft (600) when the rotary shaft rotates; and a plurality of rolling balls (300) provided in a contact poreion between the external casing (100) and the rotation body (200) .

8. The rotation support apparatus of claim 7, wherein the plurality of rolling balls (300) is inserted into and held in an inner surface of the external casing (1.00) or an outer surface of the rotation body (200) .

9. The rotation support apparatus of claim 8, wherein the plurality of rolling balls (300) is provided in a state of being spaced apart from each other at predetermined regular intervals on the overall inner surface of the external casing (100) or the outer surface of the rotation body.

10. The rotation support apparatus of claim 7, wherein the external casing (100) includes first and second external casings (110 and 120) that are coupled to and separated from each other, the rotation body (200) includes first and second rotation bodies (210 and 220) that are coupled to and separated from each other, the rotation body (200) is made of an engineering plastic material or a metal material, and the plurality of rolling balls (300) is made of an engineering plastic material or a metal material.

11. The rotation support apparatus of claim 7, wherein a plurality of coupling pieces (500) is provided on the external casing (100) to couple a support pipe (400) to the external casing (100) in a state in which the coupling pieces partially cover an end portion of the support pipe.

12. The rotation support apparatus of claim 7, wherein the rotation body (200) includes first and second rotation bodies (210 and 220) that are coupled to and separated from each other, the rotation body being formed in a spherical shape, with a coupling protrusion and a coupling recess being provided on each of the first rotation body (210) and the second rotation body (220).