WO2021137342A1 - Power transmission device - Google Patents
Power transmission device Download PDFInfo
- Publication number
- WO2021137342A1 WO2021137342A1 PCT/KR2020/000132 KR2020000132W WO2021137342A1 WO 2021137342 A1 WO2021137342 A1 WO 2021137342A1 KR 2020000132 W KR2020000132 W KR 2020000132W WO 2021137342 A1 WO2021137342 A1 WO 2021137342A1
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- WIPO (PCT)
- Prior art keywords
- pulley
- power transmission
- transmission member
- driven
- surround
- Prior art date
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H55/00—Elements with teeth or friction surfaces for conveying motion; Worms, pulleys or sheaves for gearing mechanisms
- F16H55/32—Friction members
- F16H55/36—Pulleys
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H9/00—Gearings for conveying rotary motion with variable gear ratio, or for reversing rotary motion, by endless flexible members
- F16H9/02—Gearings for conveying rotary motion with variable gear ratio, or for reversing rotary motion, by endless flexible members without members having orbital motion
- F16H9/04—Gearings for conveying rotary motion with variable gear ratio, or for reversing rotary motion, by endless flexible members without members having orbital motion using belts, V-belts, or ropes
Definitions
- the present invention relates to a power transmission device capable of forming a large gear ratio without increasing the diameter of a pulley.
- the power transmission device is configured to transmit the rotational force from the main shaft rotating while forming the axis of the power source to the driven shaft forming the axis of the device to be rotated.
- Spur gear Internal gear, rack, helical gear, bevel gear, screw gear, worm gear and two shafts It is classified as a pulley that transmits power by hanging a rope or a belt that surrounds the shaft spaced apart from each other.
- worm gear in which the two shafts rotate orthogonally, there are various types of differential devices that require a high reduction ratio and antenna elevation drive devices, etc. is being used extensively.
- the diameter of the driven shaft due to the number of threads formed along the outer circumferential surface, that is, the teeth of the interlocking threads (gear teeth, ⁇ ) must be increased, Accordingly, there is a limitation that the overall height (Profile) of the mechanism in which the power transmission device is installed is formed to be high.
- the present invention has been devised to solve the above problems, and an object of the present invention is to provide a power transmission device that is installed to form a high gear ratio in a limited space as the overall height (profile) is reduced.
- the present invention relates to a pulley having an outer circumferential surface formed at a predetermined angle, a power transmission member that is provided to surround the outer circumferential surface of the driven shaft and the pulley, and a power transmission member that transmits the rotational force of the driven shaft, and is provided on the radially outer side of the pulley to face each other It relates to a power transmission device including a pair of locking ends each surrounding the power transmission member, and a pulley for parallel rotation with a driven shaft using a belt or wire, a pulley or a half-moon member provided on the outside of the pulley.
- the present invention increases spatial efficiency by reducing the overall height formed by a pulley that parallels rotation with a driven shaft using a belt or wire, a pulley or a half-moon member provided on the outside of the pulley, and at the same time, a high gear ratio has the advantage of being able to form
- FIG. 1 is a view showing a power transmission device according to a first embodiment of the present invention.
- Figure 2 is an exemplary view for explaining the rotation radius of the power transmission device of the present invention according to the pulley forming the outer peripheral surface of various angles.
- 3 and 4 are views showing a modified example of the power transmission device according to the first embodiment of the present invention.
- FIG 5 and 6 are views showing a power transmission device according to a third embodiment of the present invention.
- FIG. 7 and 8 are views showing a power transmission device according to a 1-1 embodiment of the present invention.
- FIG. 9 is a view showing a power transmission device according to a 1-2 embodiment of the present invention.
- FIG. 10 is a view showing a power transmission device according to a 2-1 embodiment of the present invention.
- FIG. 11 is a view showing a power transmission device according to a second embodiment of the present invention.
- the present invention relates to a power transmission device for transmitting power from a driving shaft rotating by receiving power to a driven shaft rotating by receiving the power of the driving shaft, the first aspect of the present invention
- the power transmission device includes a pulley having an outer circumferential surface forming a predetermined angle, a power transmission member configured to surround an outer circumferential surface of the driving shaft and the pulley, and a power transmission member transmitting a rotational force of the driving shaft, and a radially outer side of the pulley It is provided in, characterized in that it comprises a driven portion forming a pair of engaging ends each surrounding the power transmission member in opposite directions.
- the power transmission member is characterized in that it is provided to surround the outer peripheral surface of the driving shaft and the driven part on one side in the thickness direction, and to surround the outer peripheral surface of the pulley on the other side.
- the pair of engaging ends of the driven part form a straight line in the opposite direction
- the power transmission member surrounds any one of the engaging ends provided in the opposite direction to the opposite direction of the one end surrounding the driving shaft, the It is characterized in that it is configured to surround the outer peripheral surface of the pulley.
- the pair of engaging ends of the driven part is characterized in that it is configured to achieve different heights in the axial direction of the pulley.
- the pulley and the driven part is characterized in that it is made to rotate in parallel with the driven shaft.
- the driven part is made to rotate in parallel with the driven shaft
- the pulley is characterized in that it is fixed to be independent of the driven part.
- the pulley is provided so as to be spaced apart a predetermined distance outward in a radial direction of the first pulley and a first pulley forming a partially hollow opening on the outer circumferential surface, and a second pulley forming an opening in the same direction as the first pulley.
- the driven part is interposed between the first pulley and the second pulley, and the power transmission member surrounds the driving shaft and the driven part on one side in the thickness direction, and on the plurality of pulleys on the other side. It is characterized in that it is configured to surround the outer peripheral surface.
- first driven part and the second driven part is characterized in that it is provided on the same plane forming a concentric circle with the pulley.
- the driven part forms a plurality of engaging ends provided to protrude in a direction perpendicular to the outer circumferential direction of the pulley, and the power transmission member alternates the outer surfaces of the plurality of engaging ends in the circumferential direction of the pulley. And characterized in that it is configured to wrap.
- the pulley forms a concentric circle with the driven shaft, and is made to rotate in parallel with the driven shaft, characterized in that the driven part is fixed so as to rotate in parallel with the pulley.
- the power transmission member is characterized in that it wraps alternately the plurality of fixed rollers and the engaging end provided in the same direction with respect to the driven shaft.
- the power transmission device is provided so as to surround the outer peripheral surface of the pulley, the driving shaft, and the outer peripheral surface of the pulley having an outer peripheral surface forming a predetermined angle, the power transmission member for transmitting the rotational force of the driving shaft and a driven part provided on the radially outer side of the pulley to form a pair of engaging ends respectively surrounding the power transmission member in opposite directions, wherein the power transmission member has a plurality of threads formed inward.
- the outer peripheral surface of the pulley is characterized in that a plurality of threads engaged with the inner side of the power transmission member is formed.
- the pulley is made to rotate in parallel with the driven shaft, the driven part is characterized in that it is fixed to be independent of the pulley.
- the driven part is made to rotate in parallel with the driven shaft
- the pulley is characterized in that it is fixed to be independent of the driven part.
- FIG. 1 is a view showing a power transmission device according to a first embodiment of the present invention.
- the present invention is from a driving shaft 10 that rotates with power applied to the driving shaft 10 .
- the power transmission device 1000 according to the first embodiment of the present invention includes a pulley 100 having an outer circumferential surface forming a predetermined angle. ), the power transmission member 200 and the pulley 100 provided to surround the outer peripheral surfaces of the driving shaft 10 and the pulley 100 to transmit the rotational force of the driving shaft 10 and the pulley 100 in the radial direction. It may be provided in and may be configured to include a driven part 300 forming a pair of engaging ends 310 each surrounding the power transmission member 200 in opposite directions.
- the power transmission member 200 is configured to surround the outer peripheral surface of the driving shaft 10 and the driven part 300 on one side in the thickness direction, and surround the outer peripheral surface of the pulley 100 on the other side, the driven shaft ( 20) and the driven part 300 made to rotate in parallel with the driven part 300 is configured to be independent from the driven part 300 and rotates along the outer peripheral surface of the fixed pulley 100, thereby converting the rotational force of the driven shaft 10 to the driven shaft 20, or the pulley 100 and the driven part 300 are configured to rotate in parallel with the driven shaft 20, and the pulley 100, the driven part by the rotational force of the driven shaft 10 300 and the driven shaft 20 or a motor coupled to the driven shaft 10 may be configured to rotate.
- the power transmission member 200 is each wound on the pair of locking ends 310 and is configured to transmit power to the pair of locking ends 310 by rotation of the driving shaft 10 .
- it may be formed of a belt, a wire, a rope, etc. which form a closed loop and are wound to respectively surround the pair of locking ends 310 .
- the pair of locking ends 310 are provided on the radially outer side of the pulley 100 and form a pair of pulleys 301 spaced apart from each other by a predetermined distance in a straight line or a predetermined thickness of the pulley 100 .
- the driving shaft 100 is a supply/recovery roller capable of winding or unwinding the power transmission member 200 or a gear and a pulley that engages with the power transmission member 200 when the timing belt is formed and transmits power. can be configured.
- the length of one side of the power transmission member 200 drawn out from the driving shaft 10 and surrounding the outer circumferential surface of the pulley 100 and wound around any one of the pair of engaging ends 310 gradually increases.
- the pair of locking ends 310 fixed to rotate in parallel with each other rotate in a counterclockwise direction in the direction looking at FIG. 1 with respect to the pulley. do.
- the torque (T) in the driven shaft (20) according to the rotational force (f) of the driven shaft is applied to the linear distance (L) from the driven shaft to the engaging end (310) and the engaging end (310)
- the product of the rotational force (F) in the orthogonal direction ( ), and at this time, the rotational force F in the orthogonal direction acting on the engaging end 310 is the power transmission member 200 acting in the contact surface direction between the engaging end 310 and the pulley 100. It is proportional to the rotational force (f*cos(c)) of the motor shaft 10 that is recovered.
- the rotational force (torque, T) acting on the driving shaft is based on Equation 1 below, wherein the tangent angle c is in the range of 0 ⁇ c ⁇ 1/2 ⁇ , and the It is determined by the distance (t) the engaging end 310 is spaced from the outer peripheral surface.
- the power transmission device 1000 in the power transmission device 1000 according to an embodiment of the present invention, a configuration in which the driven part 300 constituting the locking end 310 rotates will be described as an example, but the power transmission device 1000 of the present invention
- the fixed relationship of the pulley 100 and the driven part 300 according to the rotation of the pulley 100 may be variously modified without departing from the gist of the present invention unless a specific limiting phrase or configuration is mentioned.
- FIG. 2 is an exemplary view for explaining the rotation radius of the power transmission device of the present invention according to a pulley whose outer circumferential surface forms various angles.
- the power transmission device 1000 of the present invention is the driven shaft 20 of FIG.
- the rotation radius is determined by the rotation angle (b) formed by the outer peripheral surface of the pulley 100 . That is, the power transmission device 1000 has an advantage that it can be efficiently designed according to the gear ratio and space required for the device by limiting the rotation angle b formed by the outer circumferential surface of the pulley 100 .
- the rotation radius of the driven shaft 20 is limited by the non-rotational angle (a) formed according to the spaced distance. (That is, the rotation radius of the driven shaft 20 is the rotation angle (b) formed by the outer circumferential surface of the pulley 100 - the non-rotation angle (a) according to the distance the pair of engaging ends 310 are spaced apart. will be achieved.)
- FIG. 3 is a configuration diagram showing a modified example of the power transmission device according to the first embodiment of the present invention
- FIG. 4 (a) is a rear view according to FIG. 3
- FIG. 4 (b) is FIG. 3 and 4
- the rotation radius of the driven shaft 20 by the non-rotation angle (a) according to the distance at which the pair of locking ends 310 is coupled is limited.
- the power transmission device 1000 of the present invention is configured such that the power transmission member 200 is twisted at least one time to surround the pulley 100 to limit the rotation radius of the driven part 300 . It may be configured to rotate more than 360 degrees without doing so.
- the power transmission member 200 of the pulley 100 so that one end 210 surrounding the driving shaft 10 surrounds any one of the engaging ends 310 provided in the opposite direction facing each other.
- the one of the locking ends 310 is wrapped around the outer circumferential surface of the pulley 100 again to wrap around the other locking end 310 is wound.
- the pair of engaging ends 310 of the driven part 300 are configured to have different heights in the axial direction of the pulley 100 , and interference between the power transmission members 200 surrounding the pulley 100 . can be minimized.
- the power transmission device 1000 of the present invention maintains the tension of the power transmission member 200 by using a plurality of idle rollers for preventing unnecessary contact between the power transmission members 200 and at the same time It may be configured to prevent friction between the power transmission members 200 .
- the power transmission member 1000 may be deformed using various coupling and fixing means suitable for the device to be applied without departing from the gist of the present invention, in which case the driven part 300 ) is a fixing means for connecting with the driven shaft 20 so that the pair of locking ends 310 are rotated, including the pair of locking ends 310, or the pair of locking ends according to the gist of the present invention.
- the stage 310 may be made through a separate fixing means that is independently fixed to the driven shaft 20, and as shown in FIGS.
- the driven part 300 has one side of the driven shaft ( 20) and is fixed to rotate in parallel, the other end may be formed of a rocker arm extending to have a predetermined length L outward in the radial direction of the driven shaft, wherein the rocker arm 300 transmits the power to the other side
- the member 200 further includes a pair of fixed ends 310 on which each is wound, wherein the power transmission member 200 includes the driving shaft 10 and the pair of fixed ends 310 to one side in the thickness direction. It is configured to wrap, and it is possible to form the power transmission member 1000 of the present invention according to the first embodiment described above.
- the pulley 100 forms an outer circumferential surface forming a predetermined angle, and is formed to have a downwardly curved shape so that the upper surface has a predetermined curvature, and the power transmission member passing through the pair of fixed ends 310 ( 200) is formed to surround the outer surface, it is possible to further reduce the overall height of the device according to the diameter of the pulley (100). That is, the driven shaft 20 does not form a concentric axis with the pulley 100 , but is formed to be radially spaced apart from the centrifugal axis of the pulley 100 , so that the limit according to the radius formed by the pulley 100 when designing the pulley 100 .
- the pulley 100 in the power transmission member 1000 of the present invention constituting the above-described configuration has the power transmission member 200 fastened to the driving shaft 10 to engage the pair of engaging ends 310 . It may be transformed into various configurations to form a guide for rotating the pair of locking ends 310 .
- the outer peripheral surface of the pulley 100 is formed to surround a part of the outer peripheral surface of the pulley 100 , and further comprising a fixed gear formed to press the power transmission member on the outer peripheral surface opposite to the pulley 100 . It is possible to maintain the tension of the power transmission member 200 surrounding the power transmission member 200 and prevent the separation of the power transmission member 200 .
- a pair of fixed ends 510 respectively provided outside the pair of locking ends 310 are formed on the other side of the rocker arm 300 to surround the upper side of the driven shaft 20 , and the A slip belt 500 having both ends fixed to a pair of fixed ends 510 of the rocker arm 300 so as to press the driven shaft 20 downwardly and interposed inside the power transmission member 200 in contact with each other. ) by further including, it is possible to prevent interference between the power transmission member 200 .
- the power transmission device 1000 includes a pulley 100 having an outer circumferential surface formed at a predetermined angle, the driving shaft and the The power transmission member 200 provided to surround the outer circumferential surface of the pulley, transmitting the rotational force of the driving shaft, and a pair of engaging members provided on the radially outer side of the pulley to respectively surround the power transmission member in opposite directions It may be configured to include a driven part 300 forming a stage, a lower plate 50 to which the pulley 100 is fixed upward, and an upper plate 40 fastened to cover the lower plate 50 .
- the pulley 100 is provided so as to be spaced a predetermined distance apart from the first pulley 110 and the first pulley 110 radially outward of the first pulley 110 forming a partly hollow opening 111 on the outer circumferential surface, the first A plurality of second pulleys 120 that form an opening 121 in the same direction as the pulley 110 are formed, and the driven part 300 includes the first pulley 110 and the second pulley 120 . At least one may be provided in a direction (radial direction) perpendicular to the driven shaft, including the first driven part 312 interposed therebetween.
- the power transmission member 200 is preferably configured to surround the driving shaft 10 and the driven part 300 on one side in the thickness direction, and surround the outer peripheral surface of the plurality of pulleys 100 on the other side.
- the rotational force (f) of the driven shaft (10) is a plurality of driven parts (312, 322) interposed between the plurality of pulleys (110, 120, 130) disposed in the radial direction of the driven shaft (20) , 332 is applied to the engaging ends 310a, 310b, 310c formed in the openings 312a, 322a, 332a, respectively, and the gear ratio is increased as the rotation of the driven shaft 20 is decelerated.
- the torque T in the driven shaft 20 of the power transmission device 1000 according to the 1-1 embodiment of the present invention is proportional to Equation 2 below.
- the force (F) applied to each of the engaging ends (310a, 310b, 310c) is inversely proportional to the distance (L) from the driven shaft (20) to each of the engaging ends (310a, 310b, 310c) , the first pulley 110 , the first driven part 312 , the second pulley 120 , and the second driven part 322 in which the power transmission member 200 is disposed in a straight line, respectively, are caught in the order By being alternately wound on the stage 310 , the rotation applied to the driven shaft 20 is reduced.
- the plurality of driven parts (312, 322, 332) is preferably provided on the same plane forming a concentric circle with the pulley 100, in this case, the plurality of pulleys (110, 120, 130) and the driven part (
- the plurality of pulleys 110, 120, and 130 are fixed to the lower plate 50, and the plurality of driven parts 312, 322 and 332 are formed downwardly on the upper plate 40, whereby the plurality of driven parts 312, 322, 332 are formed by the rotation of the power transmission member 200 of the pulleys 110, 120, and 130.
- Rotation is performed along the circumferential direction, and at this time, the driving shaft 20 is independent of the lower plate 50 and the pulley 100, and the upper plate is rotated in parallel with the plurality of driven parts 312 , 322 , 332 . It is preferably fixed at (40).
- the driven part 300 includes the pulley.
- a plurality of locking ends 310 provided to protrude in a direction perpendicular to the outer circumferential direction of 100 are formed, and the power transmission member 200 includes the plurality of locking ends 310 in the circumferential direction of the pulley 100 ( 310) is characterized in that it is configured to alternately wrap the outer circumferential surface. That is, the power transmission member 200 that transmits the rotational force of the driving shaft 10 is wound around the driven part 300 and operates to pivotally rotate the pulley 100 .
- the driving shaft 200 is spaced apart from each other in the radial direction of the pulley 100 so that one side of the power transmission member 200 surrounds the outer peripheral surfaces of the driving shaft 10 and the pulley 100 . have.
- the pulley 100 forms a concentric circle with the driven shaft 20, and the driven shaft 20 ) and rotation in parallel
- the driven part 300 is fixed to rotate in parallel with the pulley 100, and may be formed to transmit the rotational force of the driven shaft 10 to the driven shaft 20 have.
- the power transmission device 1000 is provided to be symmetrically spaced apart from each other by a predetermined distance outward in the radial direction of the pulley 100 , and is adjacent to the driven shaft 20 in the axial direction.
- the power transmission member 200 is provided in the same direction with respect to the driven shaft 20, the plurality of Alternately wraps the fixed roller 351 and the engaging end 310 of the pulley 100, and then wraps around the outer peripheral surface of the pulley 100 to surround the plurality of fixed rollers 351 and the engaging end 310 provided on the opposite side of the driving shaft ( 10) may be configured to be coupled to.
- the plurality of fixed rollers 351 are spaced apart from each other by a predetermined distance in the radial direction of the pulley 100 to be fixedly installed on the idler 350 provided to be symmetrical with each other with respect to the driven shaft 20 .
- the idler 350 is preferably formed to be fixed at a predetermined position independently of the pulley and the driven part 300 .
- the power transmission member 200 drawn out from the driven shaft 10 has any one fixed roller 351a on any one idler 350 provided on one side in the radial direction of the driven shaft 20 .
- any one of the locking ends 310b of the plurality of locking ends 310 of the pulley 100 provided at a position corresponding to the one fixed roller 351a is wrapped, and again the one fixed roller 351a ) from the other fixed roller 351c provided to be spaced apart by a predetermined distance in the axial direction of the driven shaft 20 - on the outer peripheral surface of the pulley 100 at a position corresponding to the other fixed roller 351c
- the locking end 310e-fixing roller 351f-locking end wrapped around the outer circumferential surface of the pulley 100 and provided on the other side in the radial direction of the driven shaft 20 (310g) - After wrapping in the order of the fixed roller (351h), it is coupled to the driving shaft (20).
- the rotational force f of the driven shaft 10 is applied to the plurality of engaging ends 310 disposed in the radial direction of the pulley 100, respectively, and a pulley formed to rotate in parallel with the driven shaft 20 ( 100), the gear ratio increases as the rotation decelerates.
- Second embodiment Timing belt - Power transmission according to the pulley >
- the power transmission member 200 is formed of a timing belt having gear teeth (hereinafter referred to as a thread) formed therein, and the pulley 100 has an outer circumferential surface.
- a screw thread engaged with the power transmission member 200 made of the timing belt is formed on the top, thereby forming a configuration for transmitting power according to the rotation of the driven shaft 10 to the driven shaft 20 .
- the power transmission device 2000 according to the second embodiment of the present invention according to the power transmission method of the above-described configuration will be classified and described.
- FIG. 10 is a view showing a power transmission device according to a 2-1 embodiment of the present invention.
- the power transmission device 2000 according to a 2-1 embodiment of the present invention is angled at a predetermined angle.
- a power transmission member 200 and the pulley provided to surround the outer peripheral surface of the pulley 100, the driving shaft 10 and the pulley 100 having an outer peripheral surface formed therein, and transmitting the rotational force of the driving shaft 10, and the pulley ( It is provided on the radially outer side of 100) and includes a driven part 300 forming a pair of engaging ends 310 each surrounding the power transmission member 200 in opposite directions, and the power transmission member ( 200) is made of a belt having a plurality of threads formed on the inside, it is characterized in that it is provided so as to surround the outer peripheral surface of the driving shaft 10, a pair of locking ends 310 and the pulley 100 to the inside.
- the pulley 100 is made to rotate in parallel with the driven shaft 20, the driven part 300 is fixed to be independent of the pulley 100, and the driven shaft 10 is the pulley ( 100), maintaining a high gear ratio, and has the advantage of reducing the overall height (L) of the power transmission device (2000).
- the power transmission device 2000 according to a 2-2 embodiment of the present invention is the driven part ( 300) is made to rotate in parallel with the driven shaft 20, the pulley 100 is characterized in that it is fixed to perform independent rotation with the driven part (300).
- the rotational force f of the driving shaft 10 is transmitted to the pulley 100 fixed through the power transmission member 200, and the power transmission member 200 and the pulley 100 are engaged with the A reaction force according to the rotational force f is transmitted in a tangential direction between the engaging end 310 and the pulley 100 .
- the reaction force ( ) is proportional to the gear ratio of the driving shaft 10 and the pulley 100 .
- the torque T in the driven shaft 20 according to the rotational force f of the driven shaft is the linear distance L from the driven shaft 20 to the engaging end 310 and the engaging end ( 310) is the product of the rotational force (F) in the orthogonal direction ( ), and at this time, the rotational force F in the orthogonal direction applied to the engaging end 310 is the power transmission member 200 acting in the direction of contact between the engaging end 310 and the pulley 100 .
- Equation 3 the tangent angle c is in the range of 0 ⁇ c ⁇ 1/2 ⁇ , and the It is determined by the distance (t) the engaging end 310 is spaced from the outer peripheral surface.
- Equation 3 to which this is applied can be expressed as Equation 4 below, that is, in the power transmission device 2000 according to the 2-2 embodiment of the present invention, the pair of locking ends 310 from the pulley 100 form It is possible to form an increased gear ratio in proportion to the linear distance (t).
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Abstract
The present invention relates to a power transmission device having a reduced overall profile of a pulley, which rotates along with a driven shaft by means of a belt or wire, and of wheels or a semi-circular member provided on the outside of the pulley, thereby allowing spatial efficiency to be increased as well as high gear ratio to be attained.
Description
본 발명은 풀리의 직경을 증가시키지 않고, 큰 기어비를 형성할 수 있는 동력전달장치에 관한 것이다.The present invention relates to a power transmission device capable of forming a large gear ratio without increasing the diameter of a pulley.
동력전달장치란, 동력원의 축을 이루며 회전하는 원동축으로 부터의 회전력을 피회전장치의 축을 이루는 종동축에 전달하도록 구성되는 것으로서, 일반적으로 두 축이 이루는 상태나 이(治)의 모양에 따라, 스퍼기어(spur gear), 인터널기어(internal gear), 래크(rack), 헬리컬기어(gellical gear), 베벨기어(bevel gear) , 나사기어(screw gear), 웜기어(worm gear) 및 두 축이 일정거리 이격되어 축을 감싸는 로프 또는 벨트를 걸어 동력을 전달하는 풀리(Pully) 등으로 분류되며, 이때 두 축이 직교하며 회전하는 웜기어의 경우 높은 감속비를 요구하는 차동장치 및 안테나의 앙각구동장치 등에 다양하게 활용되고 있다.The power transmission device is configured to transmit the rotational force from the main shaft rotating while forming the axis of the power source to the driven shaft forming the axis of the device to be rotated. Generally, depending on the state of the two shafts or the shape of the teeth, Spur gear, internal gear, rack, helical gear, bevel gear, screw gear, worm gear and two shafts It is classified as a pulley that transmits power by hanging a rope or a belt that surrounds the shaft spaced apart from each other. At this time, in the case of a worm gear in which the two shafts rotate orthogonally, there are various types of differential devices that require a high reduction ratio and antenna elevation drive devices, etc. is being used extensively.
그러나, 상술한 바와 같은 종래의 동력전달장치는 높은 기어비를 이루기 위해서 서로 맞물리는 나사산(기어 이, 治)의 치형 즉, 외주면을 따라 형성된 나사산의 개수에 기인하는 종동축의 직경을 증가시켜야 하고, 이에 따라 동력전달장치가 설치되는 기구의 전반적인 높이(Profile)가 높게 형성될 수밖에 없다는 한계가 발생하게 된다.However, in the conventional power transmission device as described above, in order to achieve a high gear ratio, the diameter of the driven shaft due to the number of threads formed along the outer circumferential surface, that is, the teeth of the interlocking threads (gear teeth, 治) must be increased, Accordingly, there is a limitation that the overall height (Profile) of the mechanism in which the power transmission device is installed is formed to be high.
본 발명은 상기한 문제점을 해결하고자 안출된 것으로, 전반적인 높이(profile)가 저감됨에 따른, 한정된 공간상에 높은 기어비를 형성 가능하도록 설치되는 동력전달장치를 제공하고자 한다.The present invention has been devised to solve the above problems, and an object of the present invention is to provide a power transmission device that is installed to form a high gear ratio in a limited space as the overall height (profile) is reduced.
본 발명은 소정각도를 이루는 외주면이 형성된 풀리와, 원동축 및 풀리의 외주면을 감싸도록 구비되어, 원동축의 회전력을 전달하는 동력전달부재 및 풀리의 반경방향 외측에 구비되어, 서로 대향되는 방향으로 상기 동력전달부재를 각기 감싸는 한 쌍의 걸림단을 포함하는 동력전달장치에 관한 것으로, 밸트 또는 와이어를 이용하여 종동축과 회전을 병행하는 풀리, 풀리의 외측에 구비된 도르래 또는 반달부재가 이루는 전반적인 높이를 저감시켜 공간적 효율을 증대시킴과 동시에 높은 기어비를 형성할 수 있다.The present invention relates to a pulley having an outer circumferential surface formed at a predetermined angle, a power transmission member that is provided to surround the outer circumferential surface of the driven shaft and the pulley, and a power transmission member that transmits the rotational force of the driven shaft, and is provided on the radially outer side of the pulley to face each other It relates to a power transmission device including a pair of locking ends each surrounding the power transmission member, and a pulley for parallel rotation with a driven shaft using a belt or wire, a pulley or a half-moon member provided on the outside of the pulley. By reducing the height, it is possible to increase the spatial efficiency and at the same time form a high gear ratio.
상기한 구성에 따른 본 발명은, 밸트 또는 와이어를 이용하여 종동축과 회전을 병행하는 풀리, 풀리의 외측에 구비된 도르래 또는 반달부재가 이루는 전반적인 높이를 저감시켜 공간적 효율을 증대시킴과 동시에 높은 기어비를 형성할 수 있는 장점이 있다.The present invention according to the above configuration increases spatial efficiency by reducing the overall height formed by a pulley that parallels rotation with a driven shaft using a belt or wire, a pulley or a half-moon member provided on the outside of the pulley, and at the same time, a high gear ratio has the advantage of being able to form
도 1은 본 발명의 제1실시예에 따른 동력전달장치를 도시한 도면.1 is a view showing a power transmission device according to a first embodiment of the present invention.
도 2는 외주면이 다양한 각도를 이루는 풀리에 따른 본 발명의 동력전달장치의 회전반경을 설명하기 위한 예시도.Figure 2 is an exemplary view for explaining the rotation radius of the power transmission device of the present invention according to the pulley forming the outer peripheral surface of various angles.
도 3 및 도 4는 본 발명의 제1실시예에 따른 동력전달장치의 변형예를 도시한 도면.3 and 4 are views showing a modified example of the power transmission device according to the first embodiment of the present invention.
도 5 및 도 6은 본 발명의 제3실시예에 따른 동력전달장치를 도시한 도면.5 and 6 are views showing a power transmission device according to a third embodiment of the present invention.
도 7 및 도 8은 본 발명의 제1-1실시예에 따른 동력전달장치를 도시한 도면.7 and 8 are views showing a power transmission device according to a 1-1 embodiment of the present invention.
도 9는 본 발명의 제1-2실시예에 따른 동력전달장치를 도시한 도면.9 is a view showing a power transmission device according to a 1-2 embodiment of the present invention.
도 10은 본 발명의 제2-1실시예에 따른 동력전달장치를 도시한 도면.10 is a view showing a power transmission device according to a 2-1 embodiment of the present invention.
도 11은 본 발명의 제2-2실시예에 따른 동력전달장치를 도시한 도면.11 is a view showing a power transmission device according to a second embodiment of the present invention.
상기한 과제를 해결하기 위한, 본 발명은 동력을 인가받아 회전하는 원동축으로부터, 상기 원동축의 동력을 전달받아 회전하는 종동축으로 동력을 전달하기 위한 동력전달장치에 관한 것으로, 본 발명의 제1실시예에 따른 동력전달장치는 소정각도를 이루는 외주면이 형성된 풀리, 상기 원동축 및 상기 풀리의 외주면을 감싸도록 구비되어, 상기 원동축의 회전력을 전달하는 동력전달부재 및 상기 풀리의 반경방향 외측에 구비되어, 서로 대향되는 방향으로 상기 동력전달부재를 각기 감싸는 한 쌍의 걸림단을 형성하는 피동부를 포함하는 것을 특징으로 한다.In order to solve the above problems, the present invention relates to a power transmission device for transmitting power from a driving shaft rotating by receiving power to a driven shaft rotating by receiving the power of the driving shaft, the first aspect of the present invention The power transmission device according to the first embodiment includes a pulley having an outer circumferential surface forming a predetermined angle, a power transmission member configured to surround an outer circumferential surface of the driving shaft and the pulley, and a power transmission member transmitting a rotational force of the driving shaft, and a radially outer side of the pulley It is provided in, characterized in that it comprises a driven portion forming a pair of engaging ends each surrounding the power transmission member in opposite directions.
또한, 상기 동력전달부재는 두께방향 일측으로 상기 원동축 및 피동부의 외주면을 감싸며, 타측으로 상기 풀리의 외주면을 감싸도록 구비되는 것을 특징으로 한다.In addition, the power transmission member is characterized in that it is provided to surround the outer peripheral surface of the driving shaft and the driven part on one side in the thickness direction, and to surround the outer peripheral surface of the pulley on the other side.
또한, 상기 피동부의 한 쌍의 걸림단은 마주보는 방향으로 일직선을 이루되, 상기 동력전달부재는 상기 원동축을 감싸는 일단부가 마주보는 반대방향에 구비되는 어느 하나의 걸림단을 감싸도록, 상기 풀리의 외주면을 감싸도록 구성되는 것을 특징으로 한다.In addition, the pair of engaging ends of the driven part form a straight line in the opposite direction, and the power transmission member surrounds any one of the engaging ends provided in the opposite direction to the opposite direction of the one end surrounding the driving shaft, the It is characterized in that it is configured to surround the outer peripheral surface of the pulley.
또한, 상기 피동부의 한 쌍의 걸림단은 상기 풀리의 축방향으로 서로 다른 높이를 이루도록 구성되는 것을 특징으로 한다.In addition, the pair of engaging ends of the driven part is characterized in that it is configured to achieve different heights in the axial direction of the pulley.
또한, 상기 풀리 및 피동부는 상기 종동축과 회전을 병행하도록 이루어지는 것을 특징으로 한다.In addition, the pulley and the driven part is characterized in that it is made to rotate in parallel with the driven shaft.
또한, 상기 피동부는 상기 종동축과 회전을 병행하도록 이루어지되, 상기 풀리는 상기 피동부와 독립되도록 고정되는 것을 특징으로 한다.In addition, the driven part is made to rotate in parallel with the driven shaft, the pulley is characterized in that it is fixed to be independent of the driven part.
또한, 상기 풀리는 외주면상에 일부가 중공된 개구부를 이루는 제1풀리 및 상기 제1풀리의 반경방향 외측으로 소정거리 이격되도록 구비되되, 상기 제1풀리와 동일한 방향으로 개구부를 형성하는 제2풀리를 포함하는 복수로 이루어지되, 상기 피동부는 상기 제1풀리 및 제2풀리 사이에 개재되고, 상기 동력전달부재는 두께방향 일측으로 상기 원동축 및 피동부를 감싸되, 타측으로 상기 복수의 풀리에 외주면을 감싸도록 구성되는 것을 특징으로 한다.In addition, the pulley is provided so as to be spaced apart a predetermined distance outward in a radial direction of the first pulley and a first pulley forming a partially hollow opening on the outer circumferential surface, and a second pulley forming an opening in the same direction as the first pulley. The driven part is interposed between the first pulley and the second pulley, and the power transmission member surrounds the driving shaft and the driven part on one side in the thickness direction, and on the plurality of pulleys on the other side. It is characterized in that it is configured to surround the outer peripheral surface.
또한, 상기 제1피동부 및 제2피동부는 상기 풀리와 동심원을 이루는 동일 평면상에 구비되는 것을 특징으로 한다.In addition, the first driven part and the second driven part is characterized in that it is provided on the same plane forming a concentric circle with the pulley.
또한, 상기 피동부는 상기 풀리의 외측 둘레 방향에 수직하는 방향으로 돌출되도록 구비된 복수의 걸림단을 형성하고, 상기 동력전달부재는 상기 풀리의 둘레방향으로 상기 복수의 걸림단의 외측면을 교번하며 감싸도록 구성되는 것을 특징으로 한다.In addition, the driven part forms a plurality of engaging ends provided to protrude in a direction perpendicular to the outer circumferential direction of the pulley, and the power transmission member alternates the outer surfaces of the plurality of engaging ends in the circumferential direction of the pulley. And characterized in that it is configured to wrap.
또한, 상기 풀리는 상기 종동축과 동심원을 이루며, 상기 종동축과 회전을 병행하도록 이루어지되, 상기 피동부는 상기 풀리와 회전을 병행하도록 고정되는 것을 특징으로 한다.In addition, the pulley forms a concentric circle with the driven shaft, and is made to rotate in parallel with the driven shaft, characterized in that the driven part is fixed so as to rotate in parallel with the pulley.
또한, 상기 풀리의 반경방향 외측으로 소정거리 이격되어 상기 종동축을 기준으로 서로 대칭되도록 구비되며, 상기 종동축의 축방향으로 인접하는 상기 피동부의 개수에 대응되어 구비되는 복수의 고정롤러를 더 포함하며, 상기 동력전달부재는 상기 종동축을 기준으로 동일한 방향으로 구비된 상기 복수의 고정롤러 및 걸림단을 교번하며 감싸는 것을 특징으로 한다.In addition, a plurality of fixed rollers spaced apart from each other by a predetermined distance in the radial direction of the pulley and provided to be symmetrical to each other with respect to the driven shaft, corresponding to the number of the driven parts adjacent in the axial direction of the driven shaft, are further added. Including, wherein the power transmission member is characterized in that it wraps alternately the plurality of fixed rollers and the engaging end provided in the same direction with respect to the driven shaft.
또한, 본 발명의 제2실시예에 따른 동력전달장치는, 소정각도를 이루는 외주면이 형성된 풀리, 상기 원동축 및 상기 풀리의 외주면을 감싸도록 구비되어, 상기 원동축의 회전력을 전달하는 동력전달부재 및 상기 풀리의 반경방향 외측에 구비되어, 서로 대향되는 방향으로 상기 동력전달부재를 각기 감싸는 한 쌍의 걸림단을 형성하는 피동부를 포함하되, 상기 동력전달부재는 내측으로 복수의 나사산이 형성된 벨트로 이루어지되, 내측으로 상기 원동축, 한 쌍의 걸림단 및 풀리의 외주면을 감싸도록 구비되며, 상기 풀리의 외주면은 상기 동력전달부재의 내측에 맞물리는 복수의 나사산이 형성되는 것을 특징으로 한다.In addition, the power transmission device according to the second embodiment of the present invention is provided so as to surround the outer peripheral surface of the pulley, the driving shaft, and the outer peripheral surface of the pulley having an outer peripheral surface forming a predetermined angle, the power transmission member for transmitting the rotational force of the driving shaft and a driven part provided on the radially outer side of the pulley to form a pair of engaging ends respectively surrounding the power transmission member in opposite directions, wherein the power transmission member has a plurality of threads formed inward. It is made of, it is provided so as to surround the outer peripheral surface of the driving shaft, the pair of engaging ends and the pulley to the inside, the outer peripheral surface of the pulley is characterized in that a plurality of threads engaged with the inner side of the power transmission member is formed.
또한, 상기 풀리는 상기 종동축과 회전을 병행하도록 이루어지되, 상기 피동부는 상기 풀리와 독립되도록 고정되는 것을 특징으로 한다.In addition, the pulley is made to rotate in parallel with the driven shaft, the driven part is characterized in that it is fixed to be independent of the pulley.
또한, 상기 피동부는 상기 종동축과 회전을 병행하도록 이루어지되, 상기 풀리는 상기 피동부와 독립되도록 고정되는 것을 특징으로 한다.In addition, the driven part is made to rotate in parallel with the driven shaft, the pulley is characterized in that it is fixed to be independent of the driven part.
본 발명은 다양한 변경을 가할 수 있고 여러 가지 실시예를 가질 수 있는 바, 특정 실시예들을 도면에 예시하고 상세한 설명을 하고자 한다. 그러나, 이는 본 발명을 특정한 실시 형태에 대해 한정하려는 것이 아니며, 본 발명의 사상 및 기술 범위에 포함되는 모든 변경, 균등물 내지 대체물을 포함하는 것으로 이해되어야 한다. Since the present invention can have various changes and can have various embodiments, specific embodiments are illustrated in the drawings and detailed description will be given. However, this is not intended to limit the present invention to specific embodiments, and it should be understood to include all modifications, equivalents and substitutes included in the spirit and scope of the present invention.
어떤 구성요소가 다른 구성요소에 “연결되어” 있다거나 “접속되어” 있다고 언급된 때에는, 그 다른 구성요소에 직접적으로 연결되어 있거나 또는 접속되어 있을 수도 있지만, 중간에 다른 구성요소가 존재할 수도 있다고 이해되어야 할 것이다. When a component is referred to as being “connected” or “connected” to another component, it may be directly connected or connected to the other component, but it is understood that other components may exist in between. it should be
다르게 정의되지 않는 한, 기술적이거나 과학적인 용어를 포함해서 여기서 사용되는 모든 용어들은 본 발명이 속하는 기술 분야에서 통상의 지식을 가진 자에 의해 일반적으로 이해되는 것과 동일한 의미를 가지고 있다. Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.
일반적으로 사용되는 사전에 정의되어 있는 것과 같은 용어들은 관련 기술의 문맥상 가지는 의미와 일치하는 의미를 가지는 것으로 해석되어야 하며, 본 출원에서 명백하게 정의하지 않는 한, 이상적이거나 과도하게 형식적인 의미로 해석되지 않는다. Terms such as those defined in a commonly used dictionary should be interpreted as having a meaning consistent with the meaning in the context of the related art, and should not be interpreted in an ideal or excessively formal meaning unless explicitly defined in the present application. does not
이하, 본 발명의 기술적 사상을 첨부된 도면을 사용하여 더욱 구체적으로 설명한다.Hereinafter, the technical idea of the present invention will be described in more detail with reference to the accompanying drawings.
첨부된 도면은 본 발명의 기술적 사상을 더욱 구체적으로 설명하기 위하여 도시한 일예에 불과하므로 본 발명의 기술적 사상이 첨부된 도면의 형태에 한정되는 것은 아니다.Since the accompanying drawings are merely examples shown to explain the technical idea of the present invention in more detail, the technical idea of the present invention is not limited to the form of the accompanying drawings.
< 제1실시예 : 동력전달부재 - 한 쌍의 걸림단에 따른 동력전달 ><Embodiment 1 : Power transmission member - Power transmission according to a pair of engaging ends >
도 1은 본 발명의 제1실시예에 따른 동력전달장치를 도시한 도면으로서, 도 1을 참조하면, 본 발명은 동력을 인가받아 회전하는 원동축(10)으로부터, 상기 원동축(10)의 동력을 전달받아 회전하는 종동축(20)으로 동력을 전달하기 위한 동력전달장치에 관한 것으로, 본 발명의 제1실시예에 따른 동력전달장치(1000)는 소정각도를 이루는 외주면이 형성된 풀리(100)와, 상기 원동축(10) 및 상기 풀리(100)의 외주면을 감싸도록 구비되어, 상기 원동축(10)의 회전력을 전달하는 동력전달부재(200) 및 상기 풀리(100)의 반경방향 외측에 구비되어, 서로 대향되는 방향으로 상기 동력전달부재(200)를 각기 감싸는 한 쌍의 걸림단(310)을 형성하는 피동부(300)를 포함하여 구성될 수 있다.FIG. 1 is a view showing a power transmission device according to a first embodiment of the present invention. Referring to FIG. 1 , the present invention is from a driving shaft 10 that rotates with power applied to the driving shaft 10 . To a power transmission device for transmitting power to a driven shaft 20 that rotates by receiving power, the power transmission device 1000 according to the first embodiment of the present invention includes a pulley 100 having an outer circumferential surface forming a predetermined angle. ), the power transmission member 200 and the pulley 100 provided to surround the outer peripheral surfaces of the driving shaft 10 and the pulley 100 to transmit the rotational force of the driving shaft 10 and the pulley 100 in the radial direction. It may be provided in and may be configured to include a driven part 300 forming a pair of engaging ends 310 each surrounding the power transmission member 200 in opposite directions.
이때, 상기 동력전달부재(200)는 두께방향 일측으로 상기 원동축(10) 및 피동부(300)의 외주면을 감싸며, 타측으로 상기 풀리(100)의 외주면을 감싸도록 구성되어, 상기 종동축(20)과 회전을 병행하도록 이루어진 피동부(300)가 상기 피동부(300)와 독립되도록 구성되어 고정된 풀리(100)의 외주면을 따라 회전함으로써, 상기 원동축(10)의 회전력을 상기 종동축(20)에 전달하거나, 상기 풀리(100) 및 피동부(300)가 상기 종동축(20)과 회전을 병행하도록 구성되어 상기 원동축(10)의 회전력에 의해 상기 풀리(100), 피동부(300) 및 종동축(20) 또는 상기 원동축(10)에 결합된 모터부가 회전하도록 이루어질 수 있다.At this time, the power transmission member 200 is configured to surround the outer peripheral surface of the driving shaft 10 and the driven part 300 on one side in the thickness direction, and surround the outer peripheral surface of the pulley 100 on the other side, the driven shaft ( 20) and the driven part 300 made to rotate in parallel with the driven part 300 is configured to be independent from the driven part 300 and rotates along the outer peripheral surface of the fixed pulley 100, thereby converting the rotational force of the driven shaft 10 to the driven shaft 20, or the pulley 100 and the driven part 300 are configured to rotate in parallel with the driven shaft 20, and the pulley 100, the driven part by the rotational force of the driven shaft 10 300 and the driven shaft 20 or a motor coupled to the driven shaft 10 may be configured to rotate.
여기에서, 상기 동력전달부재(200)는 상기 한 쌍의 걸림단(310)에 각기 권취되어 상기 원동축(10)의 회전에 의해 상기 한 쌍의 걸림단(310)에 동력을 전달하기 위한 구성으로, 폐루프(close loop)를 이루며 상기 한 쌍의 걸림단(310)을 각기 감싸도록 권취되는 벨트(blet), 와이어(wire) 및 로프(rope) 등으로 이루어질 수 있다. 이때 상기 한 쌍의 걸림단(310)은 상기 풀리(100)의 반경방향 외측에 구비되며, 일직선상으로 서로 소정거리 이격된 한 쌍의 도르래(301) 또는 소정 두께를 이루며 상기 풀리(100)의 외주면을 감싸되, 상기 풀리(100)의 반경방향으로 소정길이 연통된 개구부(320)를 이루는 반달부재(302)로 구성되어, 상기 동력전달부재(200)가 상기 한 쌍의 도르래(301)가 이격된 사이 및 상기 반달부재(302)의 개구부(320)를 지나 각각의 걸림단(310)을 감싸도록 이루어질 수 있다. 이때, 상기 원동축(100)은 상기 동력전달부재(200)를 감거나 풀 수 있는 공급/회수롤러 또는 상기 동력전달부재(200)가 타이밍벨트로 이루어질 경우 이에 맞물려 동력을 전달하는 기어 및 풀리로 구성될 수 있다.Here, the power transmission member 200 is each wound on the pair of locking ends 310 and is configured to transmit power to the pair of locking ends 310 by rotation of the driving shaft 10 . As a result, it may be formed of a belt, a wire, a rope, etc. which form a closed loop and are wound to respectively surround the pair of locking ends 310 . At this time, the pair of locking ends 310 are provided on the radially outer side of the pulley 100 and form a pair of pulleys 301 spaced apart from each other by a predetermined distance in a straight line or a predetermined thickness of the pulley 100 . It is composed of a half-moon member 302 that surrounds the outer circumferential surface, and forms an opening 320 communicating with a predetermined length in the radial direction of the pulley 100, so that the power transmission member 200 is the pair of pulleys 301 . Between the spaced apart and passing through the opening 320 of the half-moon member 302 may be formed to surround each of the engaging ends 310. At this time, the driving shaft 100 is a supply/recovery roller capable of winding or unwinding the power transmission member 200 or a gear and a pulley that engages with the power transmission member 200 when the timing belt is formed and transmits power. can be configured.
더욱 자세하게는, 상기 원동축(10)으로부터 인출되어 상기 풀리(100)의 외주면을 감싸고 상기 한 쌍의 걸림단(310) 중 어느 하나에 권취된 동력전달부재(200)의 일측부의 길이가 점차 짧아지도록 상기 원동축(10)이 회전하게 되면, 서로 회전을 병행하도록 고정된 상기 한 쌍의 걸림단(310)이 상기 풀리를 기준으로 상기 도 1을 바라보는 방향에서의 반시계방향으로 회전하게 된다. 이때 상기 원동축의 회전력(f)에 따른 상기 종동축(20)에서의 토크(T)는 상기 종동축으로부터 상기 걸림단(310)까지의 직선거리(L) 및 상기 걸림단(310)에 인가되는 직교방향으로의 회전력(F)의 곱(
)에 비례하게 되고, 이때 상기 걸림단(310)에 작용하는 직교방향으로의 회전력(F)는 상기 걸림단(310)과 풀리(100)의 접면 방향으로 작용하는 상기 동력전달부재(200)가 회수되는 상기 원동축(10)의 회전력(f*cos(c))에 비례한다. 즉, 상기 원동축에 작용하는 회전력(토크, T)은 하기의 식 1에 기되며, 이때 상기 접선각도(c)는 0 < c < 1/2∏ 의 범위를 이루며, 상기 풀리(100)의 외주면으로부터 상기 걸림단(310)이 이격된 거리(t)에 의해 결정된다.In more detail, the length of one side of the power transmission member 200 drawn out from the driving shaft 10 and surrounding the outer circumferential surface of the pulley 100 and wound around any one of the pair of engaging ends 310 gradually increases. When the driving shaft 10 rotates to be shorter, the pair of locking ends 310 fixed to rotate in parallel with each other rotate in a counterclockwise direction in the direction looking at FIG. 1 with respect to the pulley. do. At this time, the torque (T) in the driven shaft (20) according to the rotational force (f) of the driven shaft is applied to the linear distance (L) from the driven shaft to the engaging end (310) and the engaging end (310) The product of the rotational force (F) in the orthogonal direction ( ), and at this time, the rotational force F in the orthogonal direction acting on the engaging end 310 is the power transmission member 200 acting in the contact surface direction between the engaging end 310 and the pulley 100. It is proportional to the rotational force (f*cos(c)) of the motor shaft 10 that is recovered. That is, the rotational force (torque, T) acting on the driving shaft is based on Equation 1 below, wherein the tangent angle c is in the range of 0 < c < 1/2∏, and the It is determined by the distance (t) the engaging end 310 is spaced from the outer peripheral surface.
이하, 본 발명의 일실시예에 따른 동력전달장치(1000)는 상기 걸림단(310)을 이루는 피동부(300)가 회전하는 구성을 일예로 들어 설명하나, 본 발명의 동력전달장치(1000)의 회전에 따른 상기 풀리(100), 피동부(300)의 고정관계는 특정된 한정어구 또는 구성을 언급하지 아니하는 이상 본 발명의 요지에 벗어남이 없이 다양하게 변형실시가 가능할 것이다.Hereinafter, in the power transmission device 1000 according to an embodiment of the present invention, a configuration in which the driven part 300 constituting the locking end 310 rotates will be described as an example, but the power transmission device 1000 of the present invention The fixed relationship of the pulley 100 and the driven part 300 according to the rotation of the pulley 100 may be variously modified without departing from the gist of the present invention unless a specific limiting phrase or configuration is mentioned.
도 2는 외주면이 다양한 각도를 이루는 풀리에 따른 본 발명의 동력전달장치의 회전반경을 설명하기 위한 예시도로서, 도 2를 참조하면 본 발명의 동력전달장치(1000)는 종동축(20)의 회전반경은 상기 풀리(100)의 외주면이 이루는 회전각도(b)에 의해 결정된다. 즉, 상기 동력전달장치(1000)는 상기 풀리(100)의 외주면이 이루는 회전각도(b)를 제한함으로써, 장치가 요구되는 기어비 및 공간에 따라 효율적으로 설계할 수 있다는 장점이 있다. 이때, 상기 풀리(100)의 외주면을 따라 병행이동하는 한 쌍의 걸림단(310)은 서로를 바라보는 방향으로 소정거리 이격되게 되고 이때 상기 종동축(20)으로부터 상기 한 쌍의 걸림단(310)이 이격된 거리에 따라 형성되는 비회전각도(a) 만큼 상기 종동축(20)의 회전반경이 제한되게 된다. (즉, 상기 종동축(20)의 회전반경은 상기 풀리(100)의 외주면이 이루는 회전각도(b) - 상기 한 쌍의 걸림단(310)이 이격된 거리에 따른 비회전각도(a)를 이루게 된다.)FIG. 2 is an exemplary view for explaining the rotation radius of the power transmission device of the present invention according to a pulley whose outer circumferential surface forms various angles. Referring to FIG. 2 , the power transmission device 1000 of the present invention is the driven shaft 20 of FIG. The rotation radius is determined by the rotation angle (b) formed by the outer peripheral surface of the pulley 100 . That is, the power transmission device 1000 has an advantage that it can be efficiently designed according to the gear ratio and space required for the device by limiting the rotation angle b formed by the outer circumferential surface of the pulley 100 . At this time, the pair of engaging ends 310 moving in parallel along the outer circumferential surface of the pulley 100 are spaced apart by a predetermined distance in a direction facing each other, and at this time, the pair of engaging ends 310 from the driven shaft 20 . ), the rotation radius of the driven shaft 20 is limited by the non-rotational angle (a) formed according to the spaced distance. (That is, the rotation radius of the driven shaft 20 is the rotation angle (b) formed by the outer circumferential surface of the pulley 100 - the non-rotation angle (a) according to the distance the pair of engaging ends 310 are spaced apart. will be achieved.)
도 3은 본 발명의 제1실시예에 따른 동력전달장치의 변형예를 도시한 구성도 이며, 도 4의 (a)는 도 3에 따른 배면도이고, 도 4의 (b)는 도 3에 따른 정면도로서, 도 3 및 도 4를 참조하면, 상술한 상기 한 쌍의 걸림단(310)이 이결된 거리에 따른 비회전각도(a)에 의한 상기 종동축(20)의 회전반경이 제한되는 한계를 극복하기 위하여, 본 발명의 동력전달장치(1000)는 상기 동력전달부재(200)가 적어도 1회 이상 꼬여지도록 구성되어 상기 풀리(100)를 감싸 상기 피동부(300)의 회전반경을 제한하지 않고 360도 이상 회전할 수 있도록 구성될 수 있다.3 is a configuration diagram showing a modified example of the power transmission device according to the first embodiment of the present invention, FIG. 4 (a) is a rear view according to FIG. 3, and FIG. 4 (b) is FIG. 3 and 4, the rotation radius of the driven shaft 20 by the non-rotation angle (a) according to the distance at which the pair of locking ends 310 is coupled is limited. In order to overcome the limitation, the power transmission device 1000 of the present invention is configured such that the power transmission member 200 is twisted at least one time to surround the pulley 100 to limit the rotation radius of the driven part 300 . It may be configured to rotate more than 360 degrees without doing so.
더욱 자세하게는, 상기 동력전달부재(200)는 상기 원동축(10)을 감싸는 일단부(210)가 마주보는 반대방향에 구비되는 어느 하나의 걸림단(310)을 감싸도록 상기 풀리(100)의 외주면을 감싸고 이후, 상기 어느 하나의 걸림단(310)을 감싸고 재차 상기 풀리(100)의 외주면을 감싸 다른 하나의 걸림단(310)을 감싸도록 권취된다. 이때, 상기 피동부(300)의 한 쌍의 걸림단(310)은 상기 풀리(100)의 축방향으로 서로 다른 높이를 이루도록 구성되어, 상기 풀리(100)를 감싸는 동력전달부재(200) 간의 간섭을 최소화 할 수 있다.In more detail, the power transmission member 200 of the pulley 100 so that one end 210 surrounding the driving shaft 10 surrounds any one of the engaging ends 310 provided in the opposite direction facing each other. After wrapping the outer circumferential surface, the one of the locking ends 310 is wrapped around the outer circumferential surface of the pulley 100 again to wrap around the other locking end 310 is wound. At this time, the pair of engaging ends 310 of the driven part 300 are configured to have different heights in the axial direction of the pulley 100 , and interference between the power transmission members 200 surrounding the pulley 100 . can be minimized.
이때, 본 발명의 동력전달장치(1000)는 상기 동력전달부재(200)간의 불필요한 접촉을 방지하기 위한 다수의 아이들(idle) 롤러를 이용하여 상기 동력전달부재(200)의 장력을 유지함과 동시에 상기 동력전달부재(200)간의 마찰을 방지하도록 구성될 수 있다.At this time, the power transmission device 1000 of the present invention maintains the tension of the power transmission member 200 by using a plurality of idle rollers for preventing unnecessary contact between the power transmission members 200 and at the same time It may be configured to prevent friction between the power transmission members 200 .
더욱 자세하게는, 상술한 구성에 따른 동력전달부재(1000)는 본 발명의 요지에 벗어남이 없이 적용하고자 하는 장치에 맞는 다양한 결합, 고정수단을 이용하여 변형실시 될 수 있으며, 이때 상기 피동부(300)는 상기 한 쌍의 걸림단(310)을 포함하여, 상기 한 쌍의 걸림단(310)이 회전되도록 상기 종동축(20)과 연결하는 고정수단 또는 본 발명의 요지에 따라 상기 한 쌍의 걸림단(310)이 상기 종동축(20)에 독립되어 고정되는 별도의 고정수단을 통해 이루어질 수 있으며, 도 5 및 도 6에서 도시한 바와 같이, 상기 피동부(300)는 일측이 상기 종동축(20)과 회전을 병행하도록 고정되되, 타측이 상기 종동축의 반경방향 외측으로 소정길이(L)를 갖도록 연장된 로커암으로 형성될 수 있으며, 이때 상기 로커암(300)은 타측에 상기 동력전달부재(200)가 각기 권취되는 한 쌍의 고정단(310)을 더 포함하되, 상기 동력전달부재(200)는 두께방향 일측으로 상기 원동축(10) 및 상기 한 쌍의 고정단(310)을 감싸도록 구성되어, 상술한 제1실시예에 따른 본 발명의 동력전달부재(1000)를 형성 할 수 있다.More specifically, the power transmission member 1000 according to the above-described configuration may be deformed using various coupling and fixing means suitable for the device to be applied without departing from the gist of the present invention, in which case the driven part 300 ) is a fixing means for connecting with the driven shaft 20 so that the pair of locking ends 310 are rotated, including the pair of locking ends 310, or the pair of locking ends according to the gist of the present invention. The stage 310 may be made through a separate fixing means that is independently fixed to the driven shaft 20, and as shown in FIGS. 5 and 6, the driven part 300 has one side of the driven shaft ( 20) and is fixed to rotate in parallel, the other end may be formed of a rocker arm extending to have a predetermined length L outward in the radial direction of the driven shaft, wherein the rocker arm 300 transmits the power to the other side The member 200 further includes a pair of fixed ends 310 on which each is wound, wherein the power transmission member 200 includes the driving shaft 10 and the pair of fixed ends 310 to one side in the thickness direction. It is configured to wrap, and it is possible to form the power transmission member 1000 of the present invention according to the first embodiment described above.
이때, 상기 풀리(100)는 소정각도를 이루는 외주면을 형성하고, 상측면이 소정곡률을 갖도록 하방으로 만곡된 형상을 갖도록 형성되어, 상기 한 쌍의 고정단(310)을 지나는 상기 동력전달부재(200)의 외측면을 감싸도록 형성되어, 상기 풀리(100)의 직경에 따른 장치의 전체 높이를 더욱 저감시킬 수 있다. 즉, 상기 종동축(20)은 상기 풀리(100)와 동심축을 이루지 않고, 상기 풀리(100)의 원심으로부터 반경방향으로 이격되도록 형성되어, 설계 시 상기 풀리(100)가 이루는 반경에 따른 한계를 극복할 수 있다. 즉, 상술한 구성을 이루는 본 발명의 동력전달부재(1000)에서의 상기 풀리(100)는 상기 원동축(10)에 체결된 동력전달부재(200)가 상기 한 쌍의 걸림단(310)을 감싸며, 상기 한 쌍의 걸림단(310)을 회전시키기 위한 가이드를 형성하는 다양한 구성으로 변형실시 가능할 것이다.At this time, the pulley 100 forms an outer circumferential surface forming a predetermined angle, and is formed to have a downwardly curved shape so that the upper surface has a predetermined curvature, and the power transmission member passing through the pair of fixed ends 310 ( 200) is formed to surround the outer surface, it is possible to further reduce the overall height of the device according to the diameter of the pulley (100). That is, the driven shaft 20 does not form a concentric axis with the pulley 100 , but is formed to be radially spaced apart from the centrifugal axis of the pulley 100 , so that the limit according to the radius formed by the pulley 100 when designing the pulley 100 . can overcome That is, the pulley 100 in the power transmission member 1000 of the present invention constituting the above-described configuration has the power transmission member 200 fastened to the driving shaft 10 to engage the pair of engaging ends 310 . It may be transformed into various configurations to form a guide for rotating the pair of locking ends 310 .
이때, 상기 풀리(100)의 외주면에 일부를 감싸도록 형성되되, 상기 풀리(100)와 대향되는 외주면상에 상기 동력전달부재를 가압하도록 형성된 고정기어를 더 포함하여, 상기 풀리(100)의 외주면을 감싸는 동력전달부재(200)의 장력을 유지히고, 상기 동력전달부재(200)의 이탈을 방지할 수 있다.At this time, the outer peripheral surface of the pulley 100 is formed to surround a part of the outer peripheral surface of the pulley 100 , and further comprising a fixed gear formed to press the power transmission member on the outer peripheral surface opposite to the pulley 100 . It is possible to maintain the tension of the power transmission member 200 surrounding the power transmission member 200 and prevent the separation of the power transmission member 200 .
또한, 상기 로커암(300)의 타측에 상기 한 쌍의 걸림단(310)의 외측으로 각기 구비된 한 쌍의 고정단(510)이 형성되어, 상기 종동축(20)의 상방을 감싸며, 상기 종동축(20)을 하방으로 가압하도록 양단이 상기 로커암(300)의 한 쌍의 고정단(510)에 고정되도록 구비되어 상기 동력전달부재(200)가 서로 접하는 내측에 개재되는 슬립벨트(500)를 더 포함하여, 상기 동력전달부재(200)간에 간섭을 방지할 수 있다.In addition, a pair of fixed ends 510 respectively provided outside the pair of locking ends 310 are formed on the other side of the rocker arm 300 to surround the upper side of the driven shaft 20 , and the A slip belt 500 having both ends fixed to a pair of fixed ends 510 of the rocker arm 300 so as to press the driven shaft 20 downwardly and interposed inside the power transmission member 200 in contact with each other. ) by further including, it is possible to prevent interference between the power transmission member 200 .
< 제1-1실시예 : 기어비 증가를 위한 수직방향 배치구조 ><Example 1-1: Vertical arrangement structure for increasing gear ratio>
도 7은 본 발명의 제1-1실시예를 도시한 동력전달장치(1000)를 도시한 분해사시도이고, 도 8은 본 발명의 제1-1실시예를 도시한 동력전달장치(1000)를 도시한 단면도로서, 도 7 및 도 8을 참조하면, 본 발명의 제1-1실시예에 따른 동력전달장치(1000)는 소정각도를 이루는 외주면이 형성된 풀리(100)와, 상기 원동축 및 상기 풀리의 외주면을 감싸도록 구비되어, 상기 원동축의 회전력을 전달하는 동력전달부재(200) 및 상기 풀리의 반경방향 외측에 구비되어, 서로 대향되는 방향으로 상기 동력전달부재를 각기 감싸는 한 쌍의 걸림단을 형성하는 피동부(300)와, 상측으로 상기 풀리(100)가 고정되는 하판(50) 및 상기 하판(50)를 덮도록 체결되는 상판(40)을 포함하여 구성될 수 있다.7 is an exploded perspective view showing the power transmission device 1000 showing the 1-1 embodiment of the present invention, and FIG. 8 is the power transmission device 1000 showing the 1-1 embodiment of the present invention. As a cross-sectional view, referring to FIGS. 7 and 8 , the power transmission device 1000 according to the 1-1 embodiment of the present invention includes a pulley 100 having an outer circumferential surface formed at a predetermined angle, the driving shaft and the The power transmission member 200 provided to surround the outer circumferential surface of the pulley, transmitting the rotational force of the driving shaft, and a pair of engaging members provided on the radially outer side of the pulley to respectively surround the power transmission member in opposite directions It may be configured to include a driven part 300 forming a stage, a lower plate 50 to which the pulley 100 is fixed upward, and an upper plate 40 fastened to cover the lower plate 50 .
이때, 상기 풀리(100)는 외주면상에 일부가 중공된 개구부(111)를 이루는 제1풀리(110) 및 상기 제1풀리(110)의 반경방향 외측으로 소정거리 이격되도록 구비되되, 상기 제1풀리(110)와 동일한 방향으로 개구부(121)를 형성하는 제2풀리(120)를 포함하는 복수로 이루어지되, 상기 피동부(300)는 상기 제1풀리(110) 및 제2풀리(120) 사이에 개재되는 제1피동부(312)를 포함하여 상기 종동축과 수직되는 방향(반경방향)으로 적어도 하나 이상 구비될 수 있다. 이때 상기 동력전달부재(200)는 두께방향 일측으로 상기 원동축(10) 및 피동부(300)를 감싸되, 타측으로 상기 복수의 풀리(100)에 외주면을 감싸도록 구성되는 것이 바람직하다.At this time, the pulley 100 is provided so as to be spaced a predetermined distance apart from the first pulley 110 and the first pulley 110 radially outward of the first pulley 110 forming a partly hollow opening 111 on the outer circumferential surface, the first A plurality of second pulleys 120 that form an opening 121 in the same direction as the pulley 110 are formed, and the driven part 300 includes the first pulley 110 and the second pulley 120 . At least one may be provided in a direction (radial direction) perpendicular to the driven shaft, including the first driven part 312 interposed therebetween. At this time, the power transmission member 200 is preferably configured to surround the driving shaft 10 and the driven part 300 on one side in the thickness direction, and surround the outer peripheral surface of the plurality of pulleys 100 on the other side.
이에 따라, 상기 원동축(10)의 회전력(f)은 상기 종동축(20)의 반경방향으로 배치된 복수의 풀리(110, 120, 130)의 사이에 개재된 복수의 피동부(312, 322, 332)의 개구부(312a, 322a, 332a)에 형성된 걸림단(310a, 310b, 310c)에 각기 인가되어, 상기 종동축(20)의 회전이 감속함에 따른 기어비가 증대되게 된다. 이때 본 발명의 제1-1실시예에 따른 동력전달장치(1000)의 종동축(20)에서의 토크(T)는 하기의 식2에 비례한다.Accordingly, the rotational force (f) of the driven shaft (10) is a plurality of driven parts (312, 322) interposed between the plurality of pulleys (110, 120, 130) disposed in the radial direction of the driven shaft (20) , 332 is applied to the engaging ends 310a, 310b, 310c formed in the openings 312a, 322a, 332a, respectively, and the gear ratio is increased as the rotation of the driven shaft 20 is decelerated. At this time, the torque T in the driven shaft 20 of the power transmission device 1000 according to the 1-1 embodiment of the present invention is proportional to Equation 2 below.
여기에서 상기 각각의 걸림단(310a, 310b, 310c)에 인가되는 힘(F)는 상기 종동축(20)으로부터 상기 각각의 걸림단(310a, 310b, 310c)까지의 거리(L)에 반비례하고, 상기 동력전달부재(200)가 일직선상으로 배치되는 상기 제1풀리(110), 제1피동부(312), 제2풀리(120) 및 제2피동부(322)의 순으로 각각의 걸림단(310)에 교번되며 감기도록 구성됨으로써, 상기 종동축(20)에 인가되는 회전을 감속하게 된다.Here, the force (F) applied to each of the engaging ends (310a, 310b, 310c) is inversely proportional to the distance (L) from the driven shaft (20) to each of the engaging ends (310a, 310b, 310c) , the first pulley 110 , the first driven part 312 , the second pulley 120 , and the second driven part 322 in which the power transmission member 200 is disposed in a straight line, respectively, are caught in the order By being alternately wound on the stage 310 , the rotation applied to the driven shaft 20 is reduced.
더하여, 상기 복수의 피동부(312, 322, 332)는 상기 풀리(100)와 동심원을 이루는 동일 평면상에 구비되는 것이 바람직하며, 이때 상기 복수의 풀리(110, 120, 130) 및 피동부(312, 322, 332)를 교번하며 감싸는 동력전달부재(200)의 조립을 위해서, 상기 복수의 풀리(110, 120, 130)는 상기 하판(50)에 고정되고, 상기 복수의 피동부(312, 322, 332)는 상기 상판(40)에 하방으로 형성됨으로써, 상기 동력전달부재(200)의 회전에 의해 상기 복수의 피동부(312, 322, 332)가 상기 풀리(110, 120, 130)의 둘레방향을 따라 회전을 수행하고, 이때 상기 원동축(20)은 상기 하판(50) 및 풀리(100)에 독립되어, 상기 복수의 피동부(312, 322, 332)와 회전을 병행하도록 상기 상판(40)에 고정되는 것이 바람직하다.In addition, the plurality of driven parts (312, 322, 332) is preferably provided on the same plane forming a concentric circle with the pulley 100, in this case, the plurality of pulleys (110, 120, 130) and the driven part ( For assembling the power transmission member 200 that alternately wraps 312, 322, and 332, the plurality of pulleys 110, 120, and 130 are fixed to the lower plate 50, and the plurality of driven parts 312, 322 and 332 are formed downwardly on the upper plate 40, whereby the plurality of driven parts 312, 322, 332 are formed by the rotation of the power transmission member 200 of the pulleys 110, 120, and 130. Rotation is performed along the circumferential direction, and at this time, the driving shaft 20 is independent of the lower plate 50 and the pulley 100, and the upper plate is rotated in parallel with the plurality of driven parts 312 , 322 , 332 . It is preferably fixed at (40).
< 제1-2실시예 : 기어비 증가를 위한 수평방향 배치구조 ><Embodiment 1-2: Horizontal arrangement structure for increasing gear ratio>
도 9는 본 발명의 제1-2실시예에 따른 동력전달장치를 도시한 도면으로서, 본 발명의 제1-2실시예에 따른 동력전달장치(1000)는 상기 피동부(300)가 상기 풀리(100)의 외측 둘레 방향에 수직하는 방향으로 돌출되도록 구비된 복수의 걸림단(310)을 형성하고, 상기 동력전달부재(200)는 상기 풀리(100)의 둘레방향으로 상기 복수의 걸림단(310)의 외주면을 교번하며 감싸도록 구성되는 것을 특징으로 한다. 즉, 상기 원동축(10)의 회전력을 전달하는 동력전달부재(200)가 상기 피동부(300)에 권취되어, 상기 풀리(100)를 축회전 시키도록 작동한다. 이때 상기 원동축(200)은 상기 풀리(100)의 반경방향 외측으로 이격되어 상기 동력전달부재(200)의 일측면이 상기 원동축(10) 및 풀리(100)의 외주면을 감싸도록 구성될 수 있다.9 is a view showing a power transmission device according to a 1-2 embodiment of the present invention. In the power transmission device 1000 according to a 1-2 embodiment of the present invention, the driven part 300 includes the pulley. A plurality of locking ends 310 provided to protrude in a direction perpendicular to the outer circumferential direction of 100 are formed, and the power transmission member 200 includes the plurality of locking ends 310 in the circumferential direction of the pulley 100 ( 310) is characterized in that it is configured to alternately wrap the outer circumferential surface. That is, the power transmission member 200 that transmits the rotational force of the driving shaft 10 is wound around the driven part 300 and operates to pivotally rotate the pulley 100 . At this time, the driving shaft 200 is spaced apart from each other in the radial direction of the pulley 100 so that one side of the power transmission member 200 surrounds the outer peripheral surfaces of the driving shaft 10 and the pulley 100 . have.
즉, 도 9에 도시된 바와 같이, 본 발명의 제1-2실시예에 따른 동력전달장치(1000)는 상기 풀리(100)가 상기 종동축(20)과 동심원을 이루며, 상기 종동축(20)과 회전을 병행하도록 이루어지되, 상기 피동부(300)는 상기 풀리(100)와 회전을 병행하도록 고정되어, 상기 원동축(10)의 회전력을 상기 종동축(20)에 전달하도록 형성될 수 있다. 이때, 상기 동력전달장치(1000)는 상기 풀리(100)의 반경방향 외측으로 소정거리 이격되어 상기 종동축(20)을 기준으로 서로 대칭되도록 구비되며, 상기 종동축(20)의 축방향으로 인접하는 상기 걸림단(310)의 개수에 대응되어 구비되는 복수의 고정롤러(351)를 더 포함하여, 상기 동력전달부재(200)는 상기 종동축(20)을 기준으로 동일한 방향으로 구비된 상기 복수의 고정롤러(351) 및 걸림단(310)을 교번하며 감싸며, 이후 상기 풀리(100)의 외주면을 감싸 반대측에 구비된 복수의 고정롤러(351) 및 걸림단(310)을 감싸며 상기 원동축(10)에 결합되도록 구성될 수 있다.That is, as shown in FIG. 9 , in the power transmission device 1000 according to the 1-2 embodiment of the present invention, the pulley 100 forms a concentric circle with the driven shaft 20, and the driven shaft 20 ) and rotation in parallel, the driven part 300 is fixed to rotate in parallel with the pulley 100, and may be formed to transmit the rotational force of the driven shaft 10 to the driven shaft 20 have. At this time, the power transmission device 1000 is provided to be symmetrically spaced apart from each other by a predetermined distance outward in the radial direction of the pulley 100 , and is adjacent to the driven shaft 20 in the axial direction. Further comprising a plurality of fixed rollers 351 provided corresponding to the number of the engaging ends 310, the power transmission member 200 is provided in the same direction with respect to the driven shaft 20, the plurality of Alternately wraps the fixed roller 351 and the engaging end 310 of the pulley 100, and then wraps around the outer peripheral surface of the pulley 100 to surround the plurality of fixed rollers 351 and the engaging end 310 provided on the opposite side of the driving shaft ( 10) may be configured to be coupled to.
더욱 자세하게 설명하자면, 상기 복수의 고정롤러(351)는 상기 풀리(100)의 반경방향 외측으로 소정거리 이격되어 상기 종동축(20)을 기준으로 서로 대칭되도록 구비된 아이들러(350)에 고정 설치될 수 있으며, 상기 아이들러(350)는 상기 풀리 및 피동부(300)에 독립되어 정해진 위치에 고정되도록 형성되는 것이 바람직하다. 이때, 상기 원동축(10)으로부터 인출된 동력전달부재(200)는 상기 종동축(20)의 반경방향으로의 일측에 구비된 어느 하나의 아이들러(350)에 어느 하나의 고정롤러(351a)를 감싼 후, 상기 하나의 고정롤러(351a)와 대응되는 위치에 구비되는 풀리(100)의 복수의 걸림단(310) 중 어느 하나의 걸림단(310b)을 감싸고, 재차 상기 하나의 고정롤러(351a)으로부터 상기 종동축(20)의 축방향으로 소정거리 이격되도록 구비된 다른 하나의 고정롤러(351c) - 상기 다른 하나의 고정롤러(351c)와 대응되는 위치의 상기 풀리(100)의 외주면상에 구비되는 다른 하나의 걸림단(310d)를 감싼 이후, 상기 풀리(100)의 외주면을 감싸며 상기 종동축(20)의 반경방향 타측에 구비된 걸림단(310e)-고정롤러(351f)-걸림단(310g)-고정롤러(351h) 순으로 감싼 후, 상기 원동축(20)에 결합된다. 이에 따라 상기 원동축(10)의 회전력(f)은 상기 풀리(100)의 반경방향으로 배치된 복수의 걸림단(310)에 각기 인가되어 상기 종동축(20)과 회전을 병행하도록 형성된 풀리(100)의 회전이 감속함에 따른 기어비가 증대되게 된다.In more detail, the plurality of fixed rollers 351 are spaced apart from each other by a predetermined distance in the radial direction of the pulley 100 to be fixedly installed on the idler 350 provided to be symmetrical with each other with respect to the driven shaft 20 . In addition, the idler 350 is preferably formed to be fixed at a predetermined position independently of the pulley and the driven part 300 . At this time, the power transmission member 200 drawn out from the driven shaft 10 has any one fixed roller 351a on any one idler 350 provided on one side in the radial direction of the driven shaft 20 . After wrapping, any one of the locking ends 310b of the plurality of locking ends 310 of the pulley 100 provided at a position corresponding to the one fixed roller 351a is wrapped, and again the one fixed roller 351a ) from the other fixed roller 351c provided to be spaced apart by a predetermined distance in the axial direction of the driven shaft 20 - on the outer peripheral surface of the pulley 100 at a position corresponding to the other fixed roller 351c After wrapping the other locking end 310d provided, the locking end 310e-fixing roller 351f-locking end wrapped around the outer circumferential surface of the pulley 100 and provided on the other side in the radial direction of the driven shaft 20 (310g) - After wrapping in the order of the fixed roller (351h), it is coupled to the driving shaft (20). Accordingly, the rotational force f of the driven shaft 10 is applied to the plurality of engaging ends 310 disposed in the radial direction of the pulley 100, respectively, and a pulley formed to rotate in parallel with the driven shaft 20 ( 100), the gear ratio increases as the rotation decelerates.
< 제2실시예 : 타이밍벨트 - 풀리에 따른 동력전달 >< Second embodiment: Timing belt - Power transmission according to the pulley >
본 발명의 제2실시예에 따른 동력전달장치(2000)는 상기 동력전달부재(200)가 내측에 기어 이(이하, 나사산이라 함)이 형성된 타이밍밸트로 이루어지고, 상기 풀리(100)가 외주면 상에 상기 타이밍밸트로 이루어진 동력전달부재(200)에 맞물리는 나사산이 형성되도록 구성되어, 상기 원동축(10)의 회전에 따른 동력을 상기 종동축(20)에 전달하는 구성을 형성한다. 이하에서는 상술한 구성의 동력전달 방식에 따른 본 발명의 제2실시예에 따른 동력전달장치(2000)를 분류하여 설명하기로 한다. In the power transmission device 2000 according to the second embodiment of the present invention, the power transmission member 200 is formed of a timing belt having gear teeth (hereinafter referred to as a thread) formed therein, and the pulley 100 has an outer circumferential surface. A screw thread engaged with the power transmission member 200 made of the timing belt is formed on the top, thereby forming a configuration for transmitting power according to the rotation of the driven shaft 10 to the driven shaft 20 . Hereinafter, the power transmission device 2000 according to the second embodiment of the present invention according to the power transmission method of the above-described configuration will be classified and described.
< 제2-1실시예 : 타이밍벨트를 이용한 풀리 회전구동에 따른 동력전달 ><Embodiment 2-1: Power transmission according to rotational driving of pulley using timing belt>
도 10는 본 발명의 제2-1실시예에 따른 동력전달장치를 도시한 도면으로서, 도 9를 참조하면, 본 발명의 제2-1실시예에 따른 동력전달장치(2000)는 소정각도를 이루는 외주면이 형성된 풀리(100), 상기 원동축(10) 및 상기 풀리(100)의 외주면을 감싸도록 구비되어, 상기 원동축(10)의 회전력을 전달하는 동력전달부재(200) 및 상기 풀리(100)의 반경방향 외측에 구비되어, 서로 대향되는 방향으로 상기 동력전달부재(200)를 각기 감싸는 한 쌍의 걸림단(310)을 형성하는 피동부(300)를 포함하며, 상기 동력전달부재(200)는 내측으로 복수의 나사산이 형성된 벨트로 이루어지되, 내측으로 상기 원동축(10), 한 쌍의 걸림단(310) 및 풀리(100)의 외주면을 감싸도록 구비되는 것을 특징으로 한다. 이때, 상기 풀리(100)는 상기 종동축(20)과 회전을 병행하도록 이루어지되, 상기 피동부(300)는 상기 풀리(100)와 독립되도록 고정되고, 상기 원동축(10)이 상기 풀리(100)의 내측으로 구비됨으로써, 높은 기어비를 유지하며, 상기 동력전달장치(2000)가 이루는 전반적인 높이(L)를 저감시킬 수 있는 장점이 있다.10 is a view showing a power transmission device according to a 2-1 embodiment of the present invention. Referring to FIG. 9 , the power transmission device 2000 according to a 2-1 embodiment of the present invention is angled at a predetermined angle. A power transmission member 200 and the pulley provided to surround the outer peripheral surface of the pulley 100, the driving shaft 10 and the pulley 100 having an outer peripheral surface formed therein, and transmitting the rotational force of the driving shaft 10, and the pulley ( It is provided on the radially outer side of 100) and includes a driven part 300 forming a pair of engaging ends 310 each surrounding the power transmission member 200 in opposite directions, and the power transmission member ( 200) is made of a belt having a plurality of threads formed on the inside, it is characterized in that it is provided so as to surround the outer peripheral surface of the driving shaft 10, a pair of locking ends 310 and the pulley 100 to the inside. At this time, the pulley 100 is made to rotate in parallel with the driven shaft 20, the driven part 300 is fixed to be independent of the pulley 100, and the driven shaft 10 is the pulley ( 100), maintaining a high gear ratio, and has the advantage of reducing the overall height (L) of the power transmission device (2000).
< 제2-2실시예 : 타이밍벨트를 이용한 피동부 회전구동에 따른 동력전달 ><Embodiment 2-2: Power transmission according to rotational driving of a driven part using a timing belt>
도 11은 본 발명의 제2-2실시예에 따른 동력전달장치를 도시한 도면으로서, 도 11을 참조하면 본 발명의 제2-2실시예에 따른 동력전달장치(2000)는 상기 피동부(300)가 상기 종동축(20)과 회전을 병행하도록 이루어지되, 상기 풀리(100)는 상기 피동부(300)와 독립된 회전을 수행하도록 고정되는 것을 특징으로 한다.11 is a view showing a power transmission device according to a 2-2 embodiment of the present invention. Referring to FIG. 11 , the power transmission device 2000 according to a 2-2 embodiment of the present invention is the driven part ( 300) is made to rotate in parallel with the driven shaft 20, the pulley 100 is characterized in that it is fixed to perform independent rotation with the driven part (300).
더욱 자세하게는, 상기 원동축(10)의 회전력(f)은 동력전달부재(200)를 통해 고정된 상기 풀리(100)에 전달되고, 상기 동력전달부재(200)와 풀리(100)가 맞물려 상기 걸림단(310)과 풀리(100)의 접선방향으로 상기 회전력(f)에 따른 반력이 전달된다. 이때 상기 걸림단(310)에 전달되는 반력(
)은 상기 원동축(10)과 풀리(100)의 기어비에 비례하게 된다. 즉, 상기 원동축의 회전력(f)에 따른 상기 종동축(20)에서의 토크(T)는 상기 종동축(20)으로부터 상기 걸림단(310)까지의 직선거리(L) 및 상기 걸림단(310)에 인가되는 직교방향으로의 회전력(F)의 곱(
)에 비례하게 되고, 이때, 상기 걸림단(310)에 인가되는 직교방향으로의 회전력(F)은 상기 걸림단(310)과 풀리(100)의 접면 방향으로 작용하는 상기 동력전달부재(200)의 반력(f*(D/d)*cos(c))에 비례한다. 즉, 상기 원동축에 작용하는 회전력(토크, T)은 하기의 식 3에 기인되며, 이때 상기 접선각도(c)는 0 < c < 1/2∏ 의 범위를 이루며, 상기 풀리(100)의 외주면으로부터 상기 걸림단(310)이 이격된 거리(t)에 의해 결정된다.In more detail, the rotational force f of the driving shaft 10 is transmitted to the pulley 100 fixed through the power transmission member 200, and the power transmission member 200 and the pulley 100 are engaged with the A reaction force according to the rotational force f is transmitted in a tangential direction between the engaging end 310 and the pulley 100 . At this time, the reaction force ( ) is proportional to the gear ratio of the driving shaft 10 and the pulley 100 . That is, the torque T in the driven shaft 20 according to the rotational force f of the driven shaft is the linear distance L from the driven shaft 20 to the engaging end 310 and the engaging end ( 310) is the product of the rotational force (F) in the orthogonal direction ( ), and at this time, the rotational force F in the orthogonal direction applied to the engaging end 310 is the power transmission member 200 acting in the direction of contact between the engaging end 310 and the pulley 100 . is proportional to the reaction force (f*(D/d)*cos(c)) of That is, the rotational force (torque, T) acting on the driving shaft is caused by the following Equation 3, wherein the tangent angle c is in the range of 0 < c < 1/2∏, and the It is determined by the distance (t) the engaging end 310 is spaced from the outer peripheral surface.
이때, 도 10의 (b)에 도시된 바와 같이, 상기 걸림단(310)과 풀리(100)의 접선각도(c)에 따른 cos(c)는 t/(D+d)에 비례하게 되고, 이를 적용한 식 3은 하기의 식 4로 나타낼 수 있으며, 즉 본 발명의 제2-2실시예에 따른 동력전달장치(2000)는 상기 풀리(100)로부터 상기 한 쌍의 걸림단(310)이 이루는 직선거리(t)에 비례하여 증대된 기어비를 형성할 수 있다.At this time, as shown in (b) of FIG. 10, cos(c) according to the tangent angle c of the engaging end 310 and the pulley 100 is proportional to t/(D+d), Equation 3 to which this is applied can be expressed as Equation 4 below, that is, in the power transmission device 2000 according to the 2-2 embodiment of the present invention, the pair of locking ends 310 from the pulley 100 form It is possible to form an increased gear ratio in proportion to the linear distance (t).
본 발명은 상기한 실시예에 한정되지 아니하며, 적용범위가 다양함은 물론이고, 청구범위에서 청구하는 본 발명의 요지를 벗어남이 없이 다양한 변형 실시가 가능한 것은 물론이다.The present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the gist of the present invention as claimed in the claims.
Claims (8)
- 동력을 인가받아 회전하는 원동축으로부터, 상기 원동축의 동력을 전달받아 회전하는 종동축으로 동력을 전달하기 위한 동력전달장치에 있어서,In the power transmission device for transmitting power from the main shaft rotating by receiving power, to the driven shaft rotating by receiving the power of the main shaft,소정각도를 이루는 외주면이 형성된 풀리;a pulley having an outer circumferential surface forming a predetermined angle;상기 원동축 및 상기 풀리의 외주면을 감싸도록 구비되어, 상기 원동축의 회전력을 전달하는 동력전달부재; 및a power transmission member provided to surround the outer peripheral surfaces of the driving shaft and the pulley, and transmitting the rotational force of the driving shaft; and상기 풀리의 반경방향 외측에 구비되어, 서로 대향되는 방향으로 상기 동력전달부재를 각기 감싸는 한 쌍의 걸림단을 형성하는 피동부;a driven part provided on the radially outer side of the pulley to form a pair of engaging ends respectively surrounding the power transmission member in opposite directions;를 포함하는 것을 특징으로 하는 동력전달장치.Power transmission device comprising a.
- 제1항에 있어서,According to claim 1,상기 동력전달부재는,The power transmission member,두께방향 일측으로 상기 원동축 및 피동부의 외주면을 감싸며, 타측으로 상기 풀리의 외주면을 감싸도록 구비되는 것을 특징으로 하는 동력전달장치.The power transmission device, characterized in that it is provided to surround the outer peripheral surface of the driving shaft and the driven part on one side in the thickness direction, and to surround the outer peripheral surface of the pulley on the other side.
- 제2항에 있어서,3. The method of claim 2,상기 피동부의 한 쌍의 걸림단은 마주보는 방향으로 일직선을 이루되,A pair of engaging ends of the driven part form a straight line in the opposite direction,상기 동력전달부재는 상기 원동축을 감싸는 일단부가 마주보는 반대방향에 구비되는 어느 하나의 걸림단을 감싸도록, 상기 풀리의 외주면을 감싸도록 구성되는 것을 특징으로 하는 동력전달장치.The power transmission member is configured to surround the outer circumferential surface of the pulley so that one end surrounding the driving shaft surrounds any one of the engaging ends provided in the opposite direction to the opposite direction.
- 제3항에 있어서,4. The method of claim 3,상기 피동부의 한 쌍의 걸림단은 상기 풀리의 축방향으로 서로 다른 높이를 이루도록 구성되는 것을 특징으로 하는 동력전달장치.The pair of engaging ends of the driven part are configured to have different heights in the axial direction of the pulley.
- 제2항에 있어서,3. The method of claim 2,상기 풀리는,the unwinding,외주면상에 일부가 중공된 개구부를 이루는 제1풀리, 및A first pulley partially forming a hollow opening on the outer circumferential surface, and상기 제1풀리의 반경방향 외측으로 소정거리 이격되도록 구비되되, 상기 제1풀리와 동일한 방향으로 개구부를 형성하는 제2풀리,a second pulley provided to be spaced apart by a predetermined distance outward in the radial direction of the first pulley, the second pulley forming an opening in the same direction as the first pulley;를 포함하는 복수로 이루어지되,Consists of a plural comprising상기 피동부는 상기 제1풀리 및 제2풀리 사이에 개재되고,The driven part is interposed between the first pulley and the second pulley,상기 동력전달부재는 두께방향 일측으로 상기 원동축 및 피동부를 감싸되, 타측으로 상기 복수의 풀리에 외주면을 감싸도록 구성되는 것을 특징으로 하는 동력전달장치.The power transmission member is configured to surround the driving shaft and the driven part to one side in the thickness direction, and to surround the outer circumferential surface of the plurality of pulleys to the other side.
- 제1항에 있어서,According to claim 1,상기 피동부는 상기 풀리의 외측 둘레 방향에 수직하는 방향으로 돌출되도록 구비된 복수의 걸림단을 형성하고,The driven part forms a plurality of engaging ends provided to protrude in a direction perpendicular to the outer circumferential direction of the pulley,상기 동력전달부재는 상기 풀리의 둘레방향으로 상기 복수의 걸림단의 외측면을 교번하며 감싸도록 구성되는 것을 특징으로 하는 동력전달장치.The power transmission member is a power transmission device, characterized in that configured to alternately surround the outer surface of the plurality of engaging ends in the circumferential direction of the pulley.
- 제6항에 있어서,7. The method of claim 6,상기 풀리의 반경방향 외측으로 소정거리 이격되어 상기 종동축을 기준으로 서로 대칭되도록 구비되며, 상기 종동축의 축방향으로 인접하는 상기 피동부의 개수에 대응되어 구비되는 복수의 고정롤러;a plurality of fixed rollers spaced apart from each other by a predetermined distance in the radial direction of the pulley to be symmetrical to each other with respect to the driven shaft, and provided to correspond to the number of the driven parts adjacent in the axial direction of the driven shaft;를 더 포함하며,further comprising,상기 동력전달부재는 상기 종동축을 기준으로 동일한 방향으로 구비된 상기 복수의 고정롤러 및 걸림단을 교번하며 감싸는 것을 특징으로 하는 동력전달장치.The power transmission member alternately surrounds the plurality of fixed rollers and the engaging end provided in the same direction with respect to the driven shaft.
- 제1항에 있어서,According to claim 1,상기 동력전달부재는 내측으로 복수의 나사산이 형성된 벨트로 이루어지되, 내측으로 상기 원동축, 한 쌍의 걸림단 및 풀리의 외주면을 감싸도록 구비되며,The power transmission member is made of a belt having a plurality of threads formed on the inside, and is provided to surround the outer circumferential surface of the driving shaft, a pair of locking ends and the pulley inwardly,상기 풀리의 외주면은 상기 동력전달부재의 내측에 맞물리는 복수의 나사산이 형성되는 것을 특징으로 하는 동력전달장치.Power transmission device, characterized in that the outer peripheral surface of the pulley is formed with a plurality of threads engaged with the inner side of the power transmission member.
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PCT/KR2020/000132 WO2021137342A1 (en) | 2020-01-03 | 2020-01-03 | Power transmission device |
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KR20060121658A (en) * | 2003-10-13 | 2006-11-29 | 배리박스 (피티와이) 리미티드 | Infinitely variable transmission |
JP2007051724A (en) * | 2005-08-18 | 2007-03-01 | Kenji Jitsuhara | Rotary drive device |
JP2011231837A (en) * | 2010-04-27 | 2011-11-17 | Tokai Rubber Ind Ltd | Belt type reduction gear and drive device using the same |
KR20140067844A (en) * | 2012-11-27 | 2014-06-05 | 현대위아 주식회사 | Power train using wire for vehicle |
JP2017067158A (en) * | 2015-09-30 | 2017-04-06 | 学校法人立命館 | Speed reduction mechanism |
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KR20060121658A (en) * | 2003-10-13 | 2006-11-29 | 배리박스 (피티와이) 리미티드 | Infinitely variable transmission |
JP2007051724A (en) * | 2005-08-18 | 2007-03-01 | Kenji Jitsuhara | Rotary drive device |
JP2011231837A (en) * | 2010-04-27 | 2011-11-17 | Tokai Rubber Ind Ltd | Belt type reduction gear and drive device using the same |
KR20140067844A (en) * | 2012-11-27 | 2014-06-05 | 현대위아 주식회사 | Power train using wire for vehicle |
JP2017067158A (en) * | 2015-09-30 | 2017-04-06 | 学校法人立命館 | Speed reduction mechanism |
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