V-belt pulley capable of adjusting alignment of V-belt and control method thereof

Abstract

A V-belt pulley includes a plurality of rib guides projected along a circumferential surface of the V-belt pulley; and an alignment corrector that moves a V-belt in a direction towards an inside of the V-belt pulley when a rib of the V-belt is positioned outside of an outermost rib guide of the plurality of rib guides.

Claims

1. A V-belt pulley comprising: a plurality of rib guides projected along a circumferential surface of the V-belt pulley; and an alignment corrector that moves a V-belt in a direction towards an inside of the V-belt pulley when a rib of the V-belt is positioned outside of an outermost rib guide of the plurality of rib guides, and wherein the alignment corrector comprises: a lever for raising an alignment portion when the V-belt is misaligned and the rib of the V-belt contacts the lever.

2. The V-belt pulley of claim 1, wherein the alignment portion is installed in an alignment portion installing groove formed at the V-belt pulley to be moved up and down and having an alignment guide for moving the V-belt toward the V-belt pulley.

3. The V-belt pulley of claim 2, wherein the alignment guide in the alignment portion is formed such that a rib guide of the plurality of rib guides is connected to an adjacent rib guide of the plurality of rib guides.

4. The V-belt pulley of claim 3, wherein the alignment guide is formed in plural and a plurality of alignment guides are arranged to be parallel to each other.

5. The V-belt pulley of claim 4, wherein a number of the plurality of alignment guides is one smaller than a number of the plurality of rib guides.

6. The V-belt pulley of claim 2, wherein an elastic member is installed at the alignment portion installing groove and elastically supports the alignment portion in a direction of descending the alignment portion.

7. The V-belt pulley of claim 2, wherein a middle portion of the lever is hinge-connected to a side surface of the V-belt pulley, a first end portion of the lever is connected to the alignment portion and a second end portion is located adjacent to the circumferential surface of the V-belt pulley.

8. The V-belt of claim 7, wherein the circumferential surface of the second end portion of the lever has a circular arc shape and contacts the rib of the V-belt when the rib is located outside of the V-belt pulley.

9. The V-belt pulley of claim 2, further comprising a cover having a groove accommodating the first end portion of the lever to limit the rotation of the lever and being engaged outside of the V-belt pulley.

10. The V-belt pulley of claim 1, wherein the alignment corrector is provided at two positions apart from each other along the circumferential direction of the V-belt pulley, and installed to move the V-belt in directions opposite to each other.

11. The V-belt pulley of claim 10, wherein the lever is installed at opposite sides of the V-belt pulley, respectively, and a plurality of alignment guides of the alignment portion are formed to move the V-belt in directions opposite to each other.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) The above and other objects, features and advantages of the present invention will be more clearly understood from the following detailed description taken in conjunction with the accompanying drawings, in which:

(2) FIG. 1 is a perspective view illustrating a V-belt pulley and a V-belt according to the conventional art;

(3) FIG. 2 is a cross-sectional view taken along the line A-A of the FIG. 1;

(4) FIG. 3 is a perspective view illustrating a V-belt pulley capable of adjusting alignment of a V-belt and a V-belt according to an exemplary embodiment in the present disclosure;

(5) FIG. 4 is a partial enlarged perspective view of the V-belt pulley capable of adjusting alignment of the V-belt according to the present exemplary embodiment;

(6) FIG. 5 is a partial enlarged perspective view illustrating an alignment portion installing groove in the V-belt pulley capable of adjusting alignment of the V-belt according to the present exemplary embodiment;

(7) FIG. 6 is a top plan view illustrating an alignment portion in the V-belt pulley capable of adjusting alignment of the V-belt according to the present exemplary embodiment;

(8) FIG. 7 is a partial enlarged perspective view illustrating the state that a rib guide of the V-belt pulley is connected to an alignment guide of the alignment portion in the V-belt pulley capable of adjusting alignment of the V-belt according to the present exemplary embodiment;

(9) FIG. 8 is a perspective view illustrating the state that the misaligned V-belt starts to contact to a lever in the V-belt pulley capable of adjusting alignment of the V-belt according to the present exemplary embodiment;

(10) FIG. 9 is a side view illustrating the state that the misaligned V-belt starts to contact to the lever in the V-belt pulley capable of adjusting alignment of the V-belt according to the present exemplary embodiment;

(11) FIG. 10 is a cross-sectional view taken along the line C-C of the FIG. 8;

(12) FIG. 11 is a perspective view illustrating the state that the misaligned V-belt operates the lever in the V-belt pulley capable of adjusting alignment of the V-belt according to the present exemplary embodiment;

(13) FIG. 12 is a partial enlarged perspective view of FIG. 10;

(14) FIG. 13 is a cross-sectional view taken along the line D-D of the FIG. 11;

(15) FIG. 14 is a partial enlarged perspective view illustrating the state that the misaligned V-belt moves in a side direction in the V-belt pulley capable of adjusting alignment of the V-belt according to the present exemplary embodiment;

(16) FIG. 15 is a perspective view illustrating the state that the adjusting alignment state of the V-belt is completed in the V-belt pulley capable of adjusting alignment of the V-belt according to the present exemplary embodiment;

(17) FIG. 16 is a cross-sectional view taken along the line E-E of the FIG. 15; and

(18) FIG. 17 is a flow chart of a control method of the V-belt pulley capable of adjusting alignment of the V-belt according to the present exemplary embodiment.

DETAILED DESCRIPTION OF THE EMBODIMENTS

(19) Hereinafter, a V-belt pulley capable of adjusting alignment of a V-belt according to exemplary embodiments in the present disclosure will be described in detail with reference to the accompanying drawings.

(20) A V-belt pulley capable of adjusting alignment of a V-belt according to an exemplary embodiment in the present disclosure may include a plurality of rib guides 11 projected along a circumferential surface of a V-belt pulley 10 in order to be inserted between a plurality of ribs 21 formed at a V-belt 20, and an alignment corrector for moving the V-belt 20 in a direction where the plurality of rib guides 11 are formed, when any one of the plurality of ribs 21 is positioned to be misaligned at outside of the rib guide 11 formed at the outermost portion among the plurality of rib guides 11 of the V-belt pulley 10.

(21) The cross-sectional surfaces of the V-belt pulley 10 and the V-belt 20 that contact each other may have a trapezoidal shape in order to increase the area contacting each other, so that these may be applied at high speed and transmit large power.

(22) The plurality of ribs 21 may be formed at an inside surface of the V-belt 20 and the plurality of rib guides 11 may be formed at an outside surface of the V-belt pulley 10 in order for the plurality of ribs 21 to be inserted therebetween.

(23) The rib guides 11 may be formed on the circumferential surface of the V-belt pulley 10 in a circumferential direction, and formed with a predetermined interval in an axial direction of the V-belt pulley 10.

(24) The rib guides 11 may be inserted between the ribs, and slanted surfaces of the rib guides 11 may contact the slanted surfaces of the ribs 21 so that power transmission between the V-belt pulley 10 and the V-belt 20 can be possible.

(25) The alignment corrector for moving the V-belt 20 in an axial direction to be aligned may be provided at the V-belt pulley 10 when some ribs 21 among the ribs of the V-belt 20 are separated from the V-belt pulley 10 outside to be misaligned as shown in FIG. 2.

(26) As shown in FIG. 4, the alignment corrector may be installed at one side of the V-belt pulley 10 and may move the V-belt 20 in an axial direction of the V-belt pulley 10 when some ribs 21 of the V-belt 20 are separated from the V-belt pulley 10.

(27) In order to install the alignment corrector, an alignment portion installing groove 12 may be formed at the V-belt pulley 10. As shown in FIG. 5, the alignment portion installing groove 12 may be formed from the circumference surface of the V-belt pulley 10 toward a center of the alignment portion installing groove 12 at a predetermined depth. It is desirable that the alignment portion installing groove 12 is formed of an equal cross sectional area along a length direction thereof in order for an alignment portion 13 to move up and down.

(28) The alignment portion 13 may be installed to move up and down in the alignment portion installing groove 12. An alignment guide 13a having a shape similar to the rib guides 11 may be formed at an upper end of the alignment portion 13. The alignment guides 13a may be inserted into the ribs 21 of the V-belt 20.

(29) As shown in FIG. 6 and FIG. 7, the alignment guides 13a may be formed such that the rib guide 11 is connected to an adjacent rib guide 11. That is, the rib guides 11 are not connected in a circumferential direction to be cut off by the alignment portion installing groove 12, so that the alignment guides 13a may connect these. Particularly, the alignment guides 13a may connect the rib guides 11 with the other rib guides 11 most adjacent thereto. For example, the left end side rib guide 11 in the V-belt pulley 10 may be connected with the second rib guide 11 on the left side through one of the alignment guides 13a.

(30) One alignment guide 13a may connect with the next rib guide 11 most adjacent thereto, thereby moving the V-belt 20 in a side direction to adjust the alignment state of the V-belt 20.

(31) The alignment portion 13 may be positioned at inside of the alignment portion installing groove 12 when the V-belt pulley 10 and the V-belt 20 are normally aligned, but rise from the inside of the alignment portion installing groove 12 to make the alignment guides 13a and the rib guides 11 to be equal to the heights thereof when the alignment state of the V-belt pulley 10 and the V-belt 20 becomes abnormal.

(32) The alignment guide 13a may be formed in plural and in parallel with each other.

(33) Furthermore, the alignment guides 13a may be formed of the number one small than the rib guides 11. For example, as shown in FIG. 6, there may be three alignment guide 13a when there are four rib guides 11.

(34) A lever 14 may raise the alignment portion 13 when the V-belt 20 is misaligned.

(35) A middle portion of the lever 14 may be hinge-connected to the V-belt pulley 10 so that the lever 14 may rotate around the portion hinge-connected to the V-belt pulley 10.

(36) One end of the lever 14 may be connected to the alignment portion 13 so that the lever may raise the alignment portion 13 through its rotation.

(37) The other end of the lever 14 may be installed in order to be adjacently located to the circumferential surface of the V-belt pulley 10. The other end of the lever 14 may contact the ribs 21 of the V-belt 20 when the V-belt 20 is misaligned. The other end of the lever 14 may have a circular arc shape. The other end of the lever 14 may have a curvature radius about the same as a curvature radius of the V-belt pulley 10, and may be adjacently positioned at the circumferential surface of the V-belt pulley 10 so that the V-belt 20 may immediately contact the other end of the lever 14 when the V-belt 20 is misaligned.

(38) An elastic member 15 may be installed at the alignment portion installing groove 12.

(39) The elastic member 15 may elastically support the alignment portion 13 in order for the alignment portion 13 to be inserted into the alignment portion installing groove 12.

(40) The elastic member 15 may be provided as a coil spring form.

(41) A cover 16 may be engaged at a side surface of the V-belt pulley 10. The cover 16 may cover an opened portion of the alignment portion installing groove 12 in order to prevent the alignment portion 13 and the elastic member 15 from being separated.

(42) Furthermore, the cover 16 may have a groove for accommodating one end of the lever 14. The one end of the lever 14 may be located into the groove to limit a rotation angle of the lever 14. However, the cover 16 is not shown in the drawing excepting FIG. 3 and FIG. 7.

(43) Hereinafter, the operation of the V-belt pulley capable of adjusting alignment of the V-belt having the above configuration will be described.

(44) FIG. 3 illustrates the misaligned state, that is, the V-belt 20 rotates with some ribs 21 of the V-belt 20 being separated to the outside of the V-belt pulley 10. At this time, the V-belt 20 is apart from the alignment corrector, and the cross-sectional view along the line B-B of FIG. 3 is similar to that shown in FIG. 2.

(45) Thereafter, if the V-belt pulley 10 rotates, as shown in FIG. 8 to FIG. 10, the V-belt 20 begins to contact the other end of the lever 14. The rib 21 located in the outermost of the V-belt 20 contacts the other end of the lever 14 by the V-belt pulley 10.

(46) As shown in FIGS. 11 to 14, if the rotation of the V-belt 20 further progresses with the rib 21 contacting the lever 14, the lever 14 rotates to raise the alignment portion 13. If the V-belt pulley 10 rotates with the rib 21 contacting the lever 14, the rib 21 depresses the other end of the lever 14 such that the lever 14 rotates around the portion hinge-connected with the V-belt pulley 10. Since the other end of the lever 14 rotates in order to turn a center of the V-belt pulley 10, the one end of the lever 14 rotates in order to turn the circumferential surface of the V-belt pulley 10. The alignment portion 13 accommodated in the alignment portion installing groove 12 rises by the rotation of the one end of the lever 14 in order to move toward the circumferential surface of the V-belt pulley 10.

(47) If the alignment portion 13 rises, as shown in FIG. 14, since the V-belt 20 moves toward the circumferential surface of the V-belt pulley 10 along the alignment guide 13a, the V-belt 20 may move in a lateral direction. Since the V-belt 20 moves in the lateral direction, the alignment state of the V-belt 20 may be adjusted to result in a properly aligned state.

(48) If the V-belt pulley 10 rotates continuously with the alignment state of the V-belt 20 being properly adjusted with respect to the V-belt pulley 10 as above, the rib 21 rotates continuously while not contacting with the alignment corrector. The cross section at this time, as shown in FIG. 16, is the state that the rib 21 of the V-belt 20 is not separated toward the outside of the V-belt pulley 10 to be normally aligned.

(49) The alignment corrector may be installed in two different positions in the V-belt pulley 10, respectively, and each alignment corrector may be installed in order to adjust the alignment position of the V-belt 20 in a direction different from each other. That is, the alignment portion installing groove 12 may formed at two different positions apart from each other in a circumferential direction of the V-belt pulley 10, respectively, and the alignment portion 13 may be installed in the alignment portion installing groove 12 in a direction different from each other with respect to the alignment guide 13a, and the lever 14 may be installed at different surfaces of the V-belt pulley 10, respectively.

(50) Hence, if the two alignment correctors are installed at the V-belt pulley 10, respectively, the alignment state of the V-belt 20 can be adjusted in both directions of the V-belt pulley 10.

(51) FIG. 17 illustrates a control method of a V-belt pulley capable of adjusting an alignment of a V-belt according to another exemplary embodiment in the present disclosure.

(52) The control method of the V-belt pulley capable of adjusting an alignment of the V-belt according to the present exemplary embodiment may include a lever operation step S110 of contacting the misaligned rib 21 of the V-belt 20 with the lever 14 installed at an outside of the V-belt pulley 10 and rotating the lever 14, an alignment portion raising step S120 of raising the alignment portion 13 in the alignment portion installing groove 12 formed at the V-belt pulley 10 by the rotation of the lever 14, an alignment state adjusting step S130 of adjusting the alignment state of the V-belt 20 by that the alignment guide 13a formed at an upper end of the alignment portion 13 moves the V-belt 20 toward inside of the V-belt pulley 10 through the raising of the alignment portion 13, and a lever return step S140 of descending the alignment portion 13 and returning the lever 14 to an original portion thereof when the alignment state of the V-belt 20 is adjusted.

(53) A plurality of ribs 21 are formed at the V-belt 20 and a plurality of rib guides 11 are formed at the V-belt pulley 10 in order to be inserted between the ribs 21. If the rib 21 rotates with misaligned state, that is, the rib 21 located in the outermost among the ribs 21 being located outside of the rib guide 11 positioned in the outermost among the rib guides 11, noise can occur or the V-belt 20 can be damaged. However, as previously described, since the alignment corrector is provided at the V-belt pulley 10, the alignment state of the V-belt 20 can be adjusted.

(54) The lever operation step S110 is the step that the misaligned rib 21 of the V-belt 20 contacts with the lever 14 installed rotatably at the V-belt pulley 10 to rotate the lever 14 when the V-belt 20 relatively rotates with misaligned state with respect to the V-belt pulley 10. If the V-belt 20 rotates with misaligned state, the misaligned rib 21, that is, the rib 21 located outside of the rib guide 11 contacts the other end of the lever 14 installed rotatably at the V-belt pulley 10. Thereafter, if the V-belt 20 rotates continuously, the misaligned rib 21 presses the other end of the lever 14 so that the lever 14 rotates around a portion hinge-connected to the V-belt pulley 10.

(55) The alignment portion raising step S120 raises the alignment portion 13 installed at the V-belt pulley 10 to move up and down by the rotation of the lever 14. Since the alignment portion 13 is installed to move up and down in the alignment portion installing groove 12 formed at the V-belt pulley 10 and contact the lever 14, the alignment portion 13 rises if the lever 14 rotates.

(56) The alignment state adjusting step S130 is the step where the alignment state of the misaligned V-belt 20 is adjusted by the alignment guide 13a formed at the risen alignment portion 13. The alignment guide 13a may be formed at an upper end of the alignment portion 13 so that the rib guide 11 separated by the alignment portion installing groove 12 may be connected with a next adjacent rib guide 11. Therefore, if the alignment portion 13 rises, the V-belt 20 moves along the alignment guide 13a in a lateral direction so that the alignment state of the V-belt 20 can be adjusted.

(57) When the alignment state of the V-belt 20 is adjusted at the lever return step S140, since the power pressing down the lever 14 is extinguished, the alignment portion 13 and the lever 14 can be returned to their original positions, respectively.

(58) Although exemplary embodiments in the present disclosure have been disclosed for illustrative purposes, those skilled in the art will appreciate that various modifications, additions and substitutions are possible, without departing from the scope and spirit of the invention as disclosed in the accompanying claims.