JP2005226793A - Transmission - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a transmission capable of increasing the transmission efficiency of power by remarkably increasing gear ratio. <P>SOLUTION: A sun ring 7 formed in a large diameter and having a chain 8 fixedly wrapped around the outer or inner periphery thereof is installed on a frame 2. A first rotating shaft 11 is supported on the frame 2, and a planetary frame 19 is integrally fitted to the first rotating shaft 11. A second rotating shaft 21 is supported on the planetary frame 19, a planetary ring 23 is fitted to one end part of the second rotating shaft 21, and the planetary ring 23 is engaged with the chain 8 of the sun ring 7. A first pulley 25 is fitted to the second rotating shaft 21, a third rotating shaft 27 is supported on the planetary frame 19, and a second pulley 29 is fitted to the third rotating shaft 27. A wound transmission member 30 is stretched across the pulleys 25 and 29, and a third pulley 32 is fitted to the third rotating shaft 27. A fourth rotating shaft 28 is supported on the frame 2, and a fourth pulley 29 is fitted to the fourth rotating shaft 38. A wound transmission member 43 is stretched across the pulleys 32 and 39. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a transmission for use as a speed increasing device or a speed reducing device.

  This type of transmission includes a conventional planetary gear device and a planetary roller device using a friction roller.

  On the other hand, a power generation facility has been developed in which a speed increasing device is attached to a windmill or a water turbine, a generator is connected to the speed increasing device, and electric power is obtained by using environment-friendly wind power or hydraulic power.

In addition, the following are patent documents of the transmission device including the planetary mechanism.
JP 2000-297850 A

  By the way, in the power generation equipment that rotates the generator using the energy obtained from the windmill or turbine as power, the rotation speed of the windmill or turbine is small. It has become an important issue whether to raise it to

  However, the speed increasing device as a transmission using the conventional planetary gear device has a problem that the speed increasing ratio is small and the speed cannot be increased to the rotational speed at which the generator efficiently generates power.

  Further, in the transmission using the conventional planetary gear device, due to its structure, there is a problem that it takes a lot of man-hours for the production and assembly of sun gears, planetary gears, etc. There is a problem that a lot of time is required for maintenance, and there is also a problem that the efficiency decreases because the gears slide on the tooth surfaces.

  Furthermore, conventional transmissions have many bearing support members, and there is a problem of requiring a lot of lubricating oil, and there is a problem that a lot of oil seals must be installed. It is necessary to select and use a low-viscosity lubricating oil for the rotating member, and there is a problem that requires cumbersome consideration. To form an oil film on the rotating member, it is necessary to stir the lubricating oil, There was also a problem that heat of stirring was generated and loss was caused due to this.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to significantly increase the gear ratio, increase power transmission efficiency, and simplify the members necessary for the configuration. It is an object of the present invention to provide a transmission that can be manufactured or obtained, and that can be easily maintained, and that can support a bearing member.

  Another object of the present invention is to provide a transmission that can further improve power transmission efficiency.

  Another object of the present invention is to provide a transmission that can further increase the gear ratio.

  In order to achieve the above object, in the invention according to claim 1 of the present invention, the frame 2 is attached with a sun wheel 7 formed in a large diameter and fixed by winding a chain 8 around the outer periphery or the inner periphery. On the center line OO of the sun wheel 7 in the frame 2, the first rotating shaft 11 is rotatably supported. A planetary frame 19 is integrally attached to the first rotating shaft 11. The second rotating shaft 21 is supported so as to be independently rotatable at a position having a rotation radius R in the planetary frame 19. A sprocket, which is a planetary wheel 23 having a small diameter with respect to the sun wheel 7, is attached to one end of the second rotating shaft 21, and the planet wheel 23 is meshed with the chain 8 of the sun wheel 7. . A first pulley 25 having a large diameter is attached to the other end of the second rotating shaft 21. A third rotating shaft 27 is rotatably supported on the planetary frame 19. A second pulley 29 having a small diameter with respect to the first pulley 25 is integrally attached to the third rotating shaft 27, and is wound around the first and second pulleys 25 and 29. The transmission member 30 is spanned. A third pulley 32 having a large diameter is integrally attached to the third rotating shaft 27. A fourth rotary shaft 38 is rotatably supported on the frame 2. A fourth pulley 39 having a small diameter with respect to the third pulley 32 is integrally attached to the fourth rotating shaft 38, and is wound around the third and fourth pulleys 32, 39. The transmission member 43 is stretched over.

  In order to achieve the above object, in the invention according to claim 2 of the present invention, the sun wheel 7 and the planet wheel 23 are formed by a friction wheel.

  In order to achieve the above object, according to a third aspect of the present invention, the first, second, third and fourth pulleys 25, 29, 32 and 39 are formed by timing pulleys, respectively. A timing belt is wound around the pulley as a winding transmission member.

  Further, in order to achieve the above object, in the invention according to claim 4 of the present invention, the transmission is wound between the third rotating shaft 27 and the fourth rotating shaft 38 and between the large diameter pulley and the small diameter pulley. A plurality of sets of speed change mechanisms formed by spanning members are incorporated.

  In the invention according to claim 1 of the present invention, the planetary ring 23 formed in a small diameter and attached to the second rotating shaft 21 is revolved around the sun wheel 7 formed in a large diameter, and the planetary ring 23 is rotated and rotated to change the speed. A first pulley 25 having a large diameter and attached to the second rotary shaft 21; a second pulley 29 having a small diameter and attached to the third rotary shaft 27; , And a third pulley 32 that has a large diameter and is attached to the third rotating shaft 27, and a small diameter. The speed is changed by the fourth pulley 39 formed and attached to the fourth rotating shaft 38, and the winding transmission member 43 stretched between the third and fourth pulleys 38, 39. The effect that the gear ratio can be remarkably increased A.

  Further, in the invention according to claim 1, the sun wheel 7 is formed by winding and fixing the chain 8 around the outer periphery or the inner periphery, and the planet wheel 23 is engaged with the chain 8 by using a sprocket. Is brought into contact with the chain 8 of the sun wheel 7 by so-called rolling contact, revolves and rotates, so that the loss due to the sliding contact can be eliminated, and the power transmission efficiency can be improved.

  Furthermore, according to the invention described in claim 1, as described above, the sun wheel 7 is formed by winding and fixing the chain 8 around the outer periphery or the inner periphery, so that the sun wheel 7 can be formed at any pitch circle diameter. A sprocket as the planetary wheel 23, first, second, third and fourth pulleys 25, 29, 32 and 39, and a winding transmission member 30 which hangs between these paired pulleys, Since 43 is sufficient as a commercially available product, it has an effect that it can be easily obtained, and thus has an effect of reducing costs.

  Moreover, in the invention according to the first aspect, the frame 2 is attached with the sun wheel 7 formed by winding and fixing the chain 8 around the outer periphery or the inner periphery so that the first rotating shaft 11 can be rotated on the frame 2. The planetary frame 19 is attached to the first rotating shaft 11, and the second rotating shaft 21 and the third rotating shaft 27 are rotatably supported on the planetary frame 19 at a predetermined interval. A planetary wheel 23 is attached to one end portion of the second rotating shaft 21, meshed with the chain 8 of the sun wheel 7, and a first pulley 25 is attached to the other end portion of the second rotating shaft 21, A second pulley 29 is attached to one end of the third rotating shaft 27, and a winding transmission member 30 is stretched between the first and second pulleys 25, 29, and the other end of the third rotating shaft 27 is Attach a third pulley 32 to the front A fourth rotary shaft 38 is supported on the frame 2, a fourth pulley 39 is attached to the fourth rotary shaft 38, and a power transmission member 43 is hung between the third and fourth pulleys 32, 39. Since the configuration is simpler than that of a transmission employing a planetary gear device, there is an effect that maintenance can be easily performed.

  Further, according to the first aspect of the present invention, since the supporting member by the bearing can be reduced as compared with the transmission employing the planetary gear device, the amount of lubricating oil used can be reduced, and the required number of oil seals can be reduced. It is possible to reduce the amount of oil, and to reduce the consideration on the oil viscosity, and to reduce the loss due to the stirring heat generated when the lubricating oil is stirred to form an oil film.

  Further, in the invention according to claim 2 of the present invention, the sun wheel 7 and the planet wheel 23 are formed by a friction wheel, and also in this invention, the gear ratio can be remarkably increased. 23 can be easily manufactured, maintenance can be easily performed, and there is an effect that the number of supporting members by the bearings can be reduced.

  In the invention according to claim 3 of the present invention, the first, second, third and fourth pulleys 25, 29, 32 and 39 are each formed by a timing pulley, and a timing belt is provided between the paired pulleys. Since it is spanned, the power can be transmitted more efficiently.

  Furthermore, in the invention according to claim 4 of the present invention, a speed change mechanism in which a transmission member is wound around a pulley having a large diameter and a pulley having a small diameter between the third rotating shaft 27 and the fourth rotating shaft 38. Since a plurality of sets are incorporated, there is an effect that the gear ratio can be further increased.

  Embodiments of the present invention will be described below with reference to the drawings.

  FIG. 1 and FIG. 2 show an embodiment of the transmission of the present invention. FIG. 1 is an exploded view taken along line AA of FIG. 2, and FIG.

  These embodiments shown in FIGS. 1 and 2 show an example of a transmission that is suitable for use as a speed increasing device for returning the power obtained from a windmill or a water wheel to high speed rotation and rotationally driving a generator. is there.

  The transmission 1 according to this embodiment includes a frame 2. The frame 2 includes a plurality of support legs 3, a beam 4 fixed to the upper side of the support legs 3, and a plurality of support members fixed to the upper part of the support legs 3. 5 and a support plate 6 fixed to the upper part of the support base 5.

  A sun wheel 7 is attached to the lower surface of the support plate 6. The sun ring 7 is formed in a ring shape. Further, a chain 8 is wound around the outer periphery of the sun wheel 7 and is fixed by a fixing tool such as a pin 9. The sun wheel 7 is fixed to the lower surface of the support plate 6 with a fastener such as a bolt 10 around a center line OO set at the substantially central portion of the support plate 6. The chain 8 may be wound around the inner periphery of the sun wheel 7 and fixed.

  A first rotating shaft 11 is supported on the support plate 6 so as to be rotatable by a bearing portion 12 on the center line OO. A driven wheel 15 is attached to the upper end portion of the first rotating shaft 11. A planetary frame 19 is attached to the lower end of the first rotating shaft 11.

  The driven wheel 15 is integrally attached to the first rotating shaft 11 by a key 16, a washer 17 and a bolt 18. The driven wheel 15 is wound around a driving wheel 13 connected to a windmill or a water wheel via a transmission member 14 so as to rotate the first rotating shaft 11. The winding transmission member 14 is given an appropriate tension by a tension device (not shown).

  The planetary frame 19 is formed in a substantially disk shape. The planetary frame 19 is rotatably attached to the first rotating shaft 11 by a support portion 20. Further, the planetary frame 19 is provided with a second rotating shaft 21 and a third rotating shaft 27 at a predetermined interval.

  The second rotation shaft 21 is rotatably attached to the planetary frame 19 at a position with a rotation radius R by a bearing portion 22. A planetary wheel 23 is attached to the upper end portion of the second rotating shaft 21. Further, a timing pulley which is a first pulley 25 is attached to the lower end portion of the second rotating shaft 21.

  As the planetary wheel 23, a sprocket having a small diameter is used as much as possible (hereinafter simply referred to as “as much as possible”) as long as there is no problem in mounting the solar wheel 7. The planetary wheel 23 is attached to the second rotating shaft 21 by a key 24 so as to be rotatable integrally. And the sprocket which is the planetary wheel 23 is meshed with the chain 8 fixed to the outer periphery or inner periphery of the sun wheel 7. Therefore, the planetary wheel 23 revolves around the sun wheel 7 as the planetary frame 19 rotates, and rotates at the time of the revolving through the engagement with the chain 8 of the sun wheel 7 to increase the second rotation shaft 21. It is designed to rotate at high speed.

  The first pulley 25 is formed as large as possible with respect to a second pulley 29 described later. The first pulley 25 is attached to the second rotating shaft 21 so as to be integrally rotatable by a support portion 26.

  The third rotating shaft 27 is provided on the planetary frame 19 so as to be rotatable via a bearing portion 28 and in parallel with the second rotating shaft 21. A timing pulley that is a second pulley 29 is attached to an intermediate portion of the third rotating shaft 27. Further, a timing pulley that is a third pulley 32 is attached to the lower end portion of the third rotating shaft 27.

  The second pulley 29 is formed as small as possible with respect to the first pulley 25. In addition, the second pulley 29 is attached to the third rotating shaft 27 so as to be rotatable integrally therewith.

  A timing belt is wound around the first pulley 25 and the second pulley 29 as a winding transmission member 30. An appropriate tension is applied to the winding transmission member 30 by a tension device 31. As described above, the first pulley 25 having a large diameter and the second pulley 29 having a small diameter are wound around the transmission member 30 to be driven and connected. As the first pulley 25 rotates, the first pulley 25 rotates. The second pulley 29 is rotated at an increased speed, and the third rotating shaft 27 is rotated at an increased speed.

  The third pulley 32 is formed as large as possible with respect to a fourth pulley 38 described later. The third pulley 32 is attached to the third rotating shaft 27 so as to be rotatable integrally with the support portion 33.

  A bearing mounting plate 34 is attached to the frame 2. On the bearing mounting plate 34, bearing support members 35a and 35b are mounted in two upper and lower stages by fixing tools such as bolts 37. The bearing support members 35a and 35b are provided with bearings 36a and 36b. The bearings 36a and 36b are arranged in two upper and lower stages along the center line OO.

  A fourth rotary shaft 38 is rotatably supported on the bearings 36a and 36b. A fourth pulley 39 is integrally attached to the upper end portion of the fourth rotating shaft 38 by a key 40, a washer 41 and a bolt 42. In addition, a generator is connected to the lower end portion of the fourth rotating shaft 38 in this embodiment.

  As the fourth pulley 39, a timing pulley is used. Further, the fourth pulley 39 is formed as small as possible with respect to the third pulley 32.

  Between the third pulley 32 and the fourth pulley 39, a timing belt as a winding transmission member 43 is stretched. An appropriate tension is also applied to the winding transmission member 43 by the tension device 44.

  In the case of this embodiment, the transmission 1 configured as described above functions as a speed increasing device as follows.

  Now, when power is obtained from a windmill or a water wheel and the driving wheel 13 shown in FIG. 1 rotates in the clockwise direction a as viewed from above (hereinafter the same), the first rotation is passed through the winding transmission member 14 and the driven wheel 15. The shaft 11 also rotates in the clockwise direction a.

  As described above, when the first rotating shaft 11 rotates in the clockwise direction a, the planetary frame 19 also rotates in the clockwise direction a, and the second rotating shaft 21 provided on the planetary frame 19 also rotates in the clockwise hand. Revolve in direction a.

  When the second rotating shaft 21 revolves in the clockwise direction a, the second rotating shaft 21 is integrally attached to the second rotating shaft 21 and wound around the outer periphery or inner periphery of the sun wheel 7 and meshed with the fixed chain 8. The planet wheel 23 is rotated by revolving in the clockwise direction a. Here, with respect to the number of pitches p between the links of the chain 8 in the large-diameter sun wheel 7 (refer to the portion surrounded by the lower right circle in FIG. 2), the planetary wheel 23 is as small as possible. Since it is formed in a circle and has a small number of teeth, the rotational speed of the planetary wheel 23 is significantly increased with respect to the rotational speed of the first rotating shaft 11.

  As the planetary wheel 23 rotates at an increased speed in the clockwise direction a, the second rotating shaft 21 and the first pulley 25 rotate in the same direction at the same rotational speed.

  When the first pulley 25 rotates in the clockwise direction a, power is transmitted to the second pulley 29 through the winding transmission member 30, and the second pulley 29 rotates in the clockwise direction a. 3 rotary shafts 27 rotate together. Here, with respect to the number of teeth of the first pulley 25, which is a large-diameter timing pulley, the second pulley 29, which is also a timing pulley, is formed with a pitch circle diameter as small as possible and the number of teeth is as small as possible. Therefore, the rotation speed of the third rotation shaft 27 increases with respect to the rotation speed of the second rotation shaft 21. As the third rotating shaft 27 rotates, the third pulley 32, which is a timing pulley, also rotates at the same rotational speed in the clockwise direction a as the third rotating shaft 27.

  When the third pulley 32 rotates in the clockwise hand direction a, the timing pulley that is the fourth transmission 39 is rotated in the clockwise hand direction a by the timing belt that is the winding transmission member 43, and the fourth pulley 39 is By rotating, the fourth rotating shaft 38 also rotates in the clockwise hand direction a as with the fourth pulley 39. Then, with respect to the number of teeth of the third pulley 32 which is a large-diameter timing pulley, the fourth pulley 39 which is also a timing pulley is formed with a pitch circle diameter as small as possible and formed with as few teeth as possible. Therefore, the rotation speed of the fourth rotation shaft 38 increases with respect to the rotation speed of the third rotation shaft 27.

  As described above, when the fourth rotating shaft 38 rotates, in this embodiment, the generator is rotationally driven to obtain electric power.

  For example, the following table shows the number of pitches p between the links of the chain 8 of the sun wheel 7 and the number of teeth of the planetary wheel 23, the first, second, third and fourth pulleys 25, 29, 32 and 39. If the rotation speed as shown in the following table is given to the first rotary shaft 11 by wind power or hydraulic power, and loss due to friction and play between the power transmission members is not considered, The rotational speeds of the fourth rotary shafts 21, 27 and 38 are as shown in the following table.

表１−（２）

表１−（３）

[Table 1]
Table 1- (1)

Table 1- (2)

Table 1- (3)

  As can be seen from Table 1, according to this embodiment, a large speed increase ratio can be obtained. That is, the rotation speed of the fourth rotation shaft 38 as the output shaft can be significantly increased with respect to the rotation speed given to the first rotation shaft 11 as the input shaft. Therefore, even in the case of a windmill or a water turbine rotating at a low speed, in this embodiment, it is possible to efficiently convert the speed by converting it to a high speed rotation and rotating the generator.

  Further, in this embodiment, the sun wheel 7 is formed by winding and fixing the chain 8 on the outer periphery or inner periphery of the ring, and the planetary wheel 23 is engaged with the chain 8 by using a sprocket. Since the ring 7 is brought into contact with the chain 8 by rolling contact and revolves while being revolved, loss due to sliding contact in the case of a transmission employing a planetary gear device can be eliminated, thus increasing power transmission efficiency. be able to.

  Further, in this embodiment, since the sun wheel 7 is formed by winding and fixing the chain 8 around the outer periphery or inner periphery of the ring, the sun wheel 7 can be easily manufactured to an arbitrary pitch circle diameter D1. . Further, a sprocket as the planetary wheel 23, first, second, third and fourth pulleys 25, 29, 32 and 39, between the first and second pulleys 25 and 29 and third and fourth pulleys 32. , 39, the commercially available winding transmission members 30, 43 can be easily obtained. Therefore, these are combined, and the cost of the transmission can be reduced.

  In addition, in this embodiment, a chain 8 is wound around the outer periphery or inner periphery of the frame 2 and a fixed sun wheel 7 is attached to the frame 2, and the first rotating shaft 11 is rotatably supported on the frame 2. A planetary frame 19 is attached to one rotary shaft 11, and a second rotary shaft 21 and a third rotary shaft 27 are rotatably supported on the planetary frame 19 at a predetermined interval from each other. A planetary wheel 23 is attached to one end of the shaft 21, meshed with the chain 8 of the sun wheel 7, a first pulley 25 is attached to the other end of the second rotating shaft 21, and the third rotating shaft 27, a second pulley 29 is attached to one end of the belt 27, a transmission member 30 is wound around the first and second pulleys 25, 29, and the other end of the third rotating shaft 27 is 3 pulley 32 is attached to the frame 2 and the fourth The rotary shaft 38 is supported, a fourth pulley 39 is attached to the fourth rotary shaft 38, and a transmission member 43 is wound around the third and fourth pulleys 32, 39. Compared with a transmission employing a planetary gear device, the power transmission system can be easily and clearly summarized. Therefore, maintenance can be easily performed.

  Furthermore, according to this embodiment, the number of supporting members by bearings can be reduced as compared with a transmission employing a planetary gear device. As a result, the amount of lubricating oil used can be reduced, the required number of oil seals can be reduced, and the oil viscosity can be reduced using high-viscosity lubricating oil for low-speed rotating members and low for high-speed rotating members. Consideration such as using a lubricating oil having a viscosity can be reduced, and loss due to stirring heat generated by stirring the lubricating oil to form an oil film can be reduced.

[Other embodiments]
In the present invention, a so-called friction wheel in which at least an outer periphery or an inner periphery is formed of a material having a large friction coefficient such as rubber may be used for the sun wheel 7 and the planet wheel 23.

  As described above, even in the embodiment in which the friction wheel is used for the sun wheel 7 and the planet wheel 23, the gear ratio can be remarkably increased, and the sun wheel 7 and the planet wheel 23 can be easily manufactured. In addition to being able to perform maintenance easily, the number of supporting members by bearings can be reduced.

  In addition, the transmission 1 can be used as a reduction gear by using the fourth rotation shaft 38 as an input shaft, the first rotation shaft 11 as an output shaft, and the like. Thus, when the transmission 1 is used as a reduction gear, a large reduction ratio can be obtained.

  Further, a plurality of sets of speed change mechanisms in which a large-diameter pulley and a small-diameter pulley are wound and connected by a transmission member may be incorporated between the third rotary shaft 27 and the fourth rotary shaft 38. In this way, the gear ratio can be further increased.

FIG. 3 shows an embodiment of the present invention, and is an exploded view taken along line AA in FIG. 2. It is a partially broken top view of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Transmission 2 Frame 7 Sun wheel 8 Chain 11 1st rotating shaft 19 Planetary frame 21 2nd rotating shaft 23 Planetary wheel 25 1st pulley 27 3rd rotating shaft 29 2nd pulley 30 Winding transmission member 31 Tension device 32 Third pulley 38 Fourth rotation shaft 39 Fourth pulley 43 Wrap transmission member 44 Tension device

Claims (4)

To the frame (2) is attached a sun ring (7) formed with a large diameter and fixed by winding a chain (8) around the outer periphery or inner periphery.
On the center line (O)-(O) of the sun wheel (7) in the same frame (2), the first rotating shaft (11) is rotatably supported,
A planetary frame (19) is integrally attached to the first rotating shaft (11),
The second rotating shaft (21) is supported so as to be independently rotatable at a position where the radius of rotation (R) is placed in the planetary frame (19),
A sprocket which is a planetary ring (23) having a small diameter with respect to the sun wheel (7) is attached to one end of the second rotating shaft (21), and the planet wheel (23) is attached to the sun wheel (7). ), The first pulley (25) having a large diameter is attached to the other end of the second rotating shaft (21),
A third rotation shaft (27) is rotatably supported on the planetary frame (19),
A second pulley (29) having a small diameter with respect to the first pulley (25) is integrally attached to the third rotating shaft (27), and the first and second pulleys (25) are attached. ), (29), the transmission member (30) is wound around, and the third pulley (32) formed in a large diameter is integrally attached to the third rotating shaft (27),
A fourth rotation shaft (38) is rotatably supported on the frame (2),
A fourth pulley (39) having a small diameter with respect to the third pulley (32) is integrally attached to the fourth rotating shaft (28), and the third and fourth pulleys (32) are attached. ), (39) and a transmission member (43) is wound around,
A transmission characterized by that. The transmission according to claim 1, wherein the sun wheel (7) and the planetary wheel (23) are formed by a friction wheel. The first, second, third and fourth pulleys (25), (29), (32) and (39) are each formed by a timing pulley, and a timing is provided as a winding transmission member between the paired pulleys. 2. The transmission according to claim 1, wherein a belt is wound around. A plurality of sets of speed change mechanisms in which a transmission member is wound around a pulley with a large diameter and a pulley with a small diameter are incorporated between the third rotating shaft (27) and the fourth rotating shaft (38). The transmission according to claim 1.

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