Charging device of air circuit breaker

Abstract

A first support member and a second support member are provided in a rotation support device and a worm gear is rotated in a state that the second support member is inserted in the first support member, whereby the worm gear is prevented from being shaken through the first support member and the second support member and heat transmission to a housing due to rotation of the worm gear to damage the housing is prevented.

Claims

1. A charging device of an air circuit breaker including a worm gear rotated to provide power for charging a closing spring through a driving motor and a rotation support device into which the worm gear is inserted and supported, wherein the rotation support device comprises: a housing; a first support member provided within the housing, allowing the worm gear to be inserted therein and preventing shaking when the worm gear rotates, and having a rotation preventing part preventing rotation in association with rotation of the worm gear; and a second support member provided at one end of the worm gear and positioned within the first support member together with the worm gear to prevent shaking when the worm gear rotates, wherein the second support member is formed as a ball bearing to prevent shaking when the worm gear rotates.

2. The charging device of claim 1, wherein an outer circumferential surface of the ball bearing is inserted to contact an inner surface of the first support member to prevent shaking of the worm gear.

3. The charging device of claim 1, wherein an outer circumferential surface of the rotation preventing part has a sawtooth shape.

4. The charging device of claim 1, wherein at least one rotation preventing part is positioned to protrude from an outer circumferential surface of the first support member.

5. The charging device of claim 4, wherein a cross-section of the rotation preventing part has a triangle or quadrangular shape.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) The accompanying drawings, which are included to provide a further understanding of the disclosure and are incorporated in and constitute a part of this specification, illustrate exemplary embodiments and together with the description serve to explain the principles of the disclosure.

(2) In the drawings:

(3) FIG. 1 is a perspective view illustrating the conventional air circuit breaker.

(4) FIG. 2 is a cross-sectional view illustrating a charging device provided in the conventional air circuit breaker.

(5) FIG. 3 is another cross-sectional view illustrating a charging device provided in the conventional air circuit breaker.

(6) FIG. 4 is a cross-sectional view illustrating a charging device having a rotation support device according to an embodiment of the present disclosure.

(7) FIG. 5 is a perspective view illustrating a rotation support device provided in a charging device of an air circuit breaker according to an embodiment of the present disclosure.

(8) FIG. 6 is a cross-sectional view illustrating a rotation support device provided in a charging device of an air circuit breaker according to an embodiment zo of the present disclosure.

(9) FIG. 7 is a perspective view illustrating a housing forming a rotation support device according to an embodiment of the present disclosure.

(10) FIG. 8 is a perspective view illustrating a first support member forming a rotation support device according to an embodiment of the present disclosure.

(11) FIG. 9 is a perspective view illustrating a first support member forming a rotation support device according to another embodiment of the present disclosure.

(12) FIG. 10 is a perspective view illustrating a first support member forming a rotation support device according to still another embodiment of the present disclosure.

DETAILED DESCRIPTION OF THE DISCLOSURE

(13) Description will now be given in detail of the exemplary embodiments, with reference to the accompanying drawings. For the sake of brief description with reference to the drawings, the same or equivalent components will be provided with the same reference numbers, and description thereof will not be repeated.

(14) Hereinafter a charging device of an air circuit breaker according to an embodiment of the present disclosure will be described with reference to the accompanying drawings.

(15) FIG. 4 is a cross-sectional view illustrating a charging device having a rotation support device according to an embodiment of the present disclosure, FIG. 5 is a perspective view illustrating a rotation support device provided in a charging device of an air circuit breaker according to an embodiment of the present disclosure, and FIG. 6 is a cross-sectional view illustrating a rotation support zo device provided in a charging device of an air circuit breaker according to an embodiment of the present disclosure.

(16) Also, FIG. 7 is a perspective view illustrating a housing forming a rotation support device according to an embodiment of the present disclosure, FIG. 8 is a perspective view illustrating a first support member forming a rotation support device according to an embodiment of the present disclosure, FIG. 9 is a perspective view illustrating a first support member forming a rotation support device according to another embodiment of the present disclosure, and FIG. 10 is a perspective view illustrating a first support member forming a rotation support device according to still another embodiment of the present disclosure.

(17) As illustrated in FIG. 4, a charging device 100 of an air circuit breaker according to the present disclosure includes a driving motor 110 transmitting driving force for charging a closing spring (not shown), a worm gear 120 connected to the driving motor 110 and rotated by driving force from the driving motor 110, a worm wheel 130 positioned to be engaged with the worm gear 120 and rotated cooperatively according to rotation of the worm gear 120, a spur gear (not shown) connected to the worm wheel 130 through a rotational shaft, a first charging gear part 140 positioned to be engaged with the spur gear and cooperatively rotated according to rotation of the spur gear, a second charging gear part 150 positioned to be engaged with the first charging gear part 140 and rotating in association with the first charging gear part 140, and a shaft 160 rotated according to rotation of the second charging gear part 150 and connected to a mechanism (not shown) operated to compress the closing spring.

(18) Here, one end of the worm gear 120 is connected to the driving motor 110 and the other end of the worm gear 120 is inserted into a rotation support device 170 provided in the charging device 100 to prevent shaking when the worm gear 120 rotates.

(19) Thus, when the driving motor 110 operates, the worm gear 120 is rotated by the driving motor 110, each of the gear parts 130, 140, and 150 formed to rotate in association therewith rotates, and the shaft 160 and a mechanism shaft (not shown) connected to the shaft 160 simultaneously rotate, whereby the closing spring is compressed or released from a compressed state according to the operation of the mechanism.

(20) As illustrated in FIGS. 5 and 6, the rotation support device 170 includes a housing 171, a first support member 173, and a second support member 175.

(21) The housing 171 is made of plastic, or the like, forms an outer shape of the rotation support device 170, and is coupled to the charging device 100 such that the rotation support device 170 is provided in the charging device 100.

(22) Also, as illustrated in FIG. 7, a first support member installation recess 171a is formed at a central part of the housing 171 so that the first support member 173 is installed and fixed, and in a state that the first support member 173 is installed and housed in the first support member installation recess 171a, the worm gear 120 is inserted and positioned in the first support member 173.

(23) The first support member 173 in a state of being installed in the first support member installation recess 171a is provided within the housing 171, and prevents the worm gear 120 from being shaken together with the second support member 175 when the worm gear 120 rotates according to driving of the driving motor 110.

(24) Also, as illustrated in FIG. 8, a worm gear insertion recess 173b is formed in the first support member 173 such that the worm gear 120 and the second support member 175 are inserted.

(25) As the worm gear 120 and the second support member 175 formed in the worm gear 120 are inserted together into the worm gear insertion recess 173b, the worm gear 120 is prevented from being shaken when rotated through the first support member 173 and the second support member 175.

(26) That is, the second support member 175 is formed as a ball bearing, or the like, and is connected to the other end of the worm gear 120 through welding, or the like. When the ball bearing 175 is inserted into the worm gear insertion recess 173b of the first support member 173, an outer circumferential surface of the ball bearing 175 is inserted to contact an inner surface of the first support member 173 in the worm gear insertion recess 173b, and thus, when the worm gear 120 rotates, the worm gear 120 is prevented from being shaken through the ball bearing 175 and the first support member 173 to which the ball bearing 175 is inserted.

(27) Also, since the ball bearing 175 is used to prevent shaking of the worm gear 120, the ball bearing 175 rotates in a state of point-contacting with the worm gear insertion recess 173b of the first support member 173, whereby frictional force with the first support member 173 is minimized, while preventing shaking of the worm gear 120 when the worm gear 120 is rotated.

(28) The first support member 173 further includes a rotation preventing part 173a preventing the first support member 173 from rotating in association when the worm gear 120 rotates.

(29) When the first support member 173 is installed in the first support member installation recess 171a of the housing 171, the rotation preventing part 173a is engaged with an inner surface of the housing 171 to prevent the first support member 173 from rotating in association with rotation of the worm gear 120.

(30) Here, an outer circumferential surface of the rotation preventing part 173a has a sawtooth shape and the rotation preventing part 173a is firmly engaged with the inside of the housing 171 to effectively prevent rotation of the first support member 173.

(31) Also, as illustrated in FIGS. 9 and 10, at least one rotation preventing parts 173a and 172a according to another embodiment of the present disclosure may be formed to protrude from an outer circumferential surface of the first support member 173 or 173 where the worm gear insertion recess 173b or 173b is formed, and a cross-section of the rotation preventing parts 173a or 173a may have a quadrangular or triangular shape.

(32) However, a shape of the rotation preventing parts 173a and 173a is not limited thereto and the rotation preventing parts 173a and 173a may have various shapes capable of effectively preventing rotation of the first support member 173.

(33) As described above, in the present disclosure configured as described above, since the first support member 173 and the second support member 175 are provided in the rotation support device 170 provided in the charging device 100 and the worm gear 120 is rotated in a state that the second support member 175 is inserted in the first support member 173, the worm gear 120 is prevented from being shaken through the first support member 173 and the second support member 175 and heat transmission to the housing 171 due to rotation of the worm gear 120 to damage the housing 171 is prevented.

(34) Also, since the second support member 175 is configured as a ball bearing, the worm gear 120 is prevented from being shaken and frictional force of the second support member 175 and the first support member 173 is minimized.

(35) Also, since the rotation preventing part 173a is formed in the first support member 173, shaking of the worm gear 120 through the first support member 173 is prevented and rotation of the first support member 173 in association with rotation of the worm gear 120 may be prevented.

(36) The foregoing embodiments and advantages are merely exemplary and are not to be considered as limiting the present disclosure. The present teachings can be readily applied to other types of apparatuses. This description is intended to be illustrative, and not to limit the scope of the claims. Many alternatives, modifications, and variations will be apparent to those skilled in the art. The features, structures, methods, and other characteristics of the exemplary embodiments described herein may be combined in various ways to obtain additional and/or alternative exemplary embodiments.

(37) As the present features may be embodied in several forms without departing from the characteristics thereof, it should also be understood that the above-described embodiments are not limited by any of the details of the to foregoing description, unless otherwise specified, but rather should be considered broadly within its scope as defined in the appended claims, and therefore all changes and modifications that fall within the metes and bounds of the claims, or equivalents of such metes and bounds are therefore intended to be embraced by the appended claims.