JP7144946B2 - drive - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drive apparatus for transmitting rotation of a rotary drive shaft to a rotary driven shaft by means of a series of drive force transmitters arranged in an endless circulation path.

Transmission devices that transmit torque from a rotary drive shaft to a rotary driven shaft generally use belts, ropes, chains, gears, working fluids such as air and liquid, magnetic force, and the like.

Further, as disclosed in Patent Documents 1, 2, 3, etc., transmission devices using a series of driving force transmitters that move in an endless circulation path are also known.

JP-A-7-174206 JP-A-2004-218651 Japanese Patent Application Publication No. 2005-509810 JP-A-5-187440

However, the conventional transmission device has the following problems.

First, belts, ropes, or chains are limited in scope because they can only be applied where the driving and driven pulleys and sprockets can be positioned on the same plane.

In addition, when a belt or rope is used, a drive loss occurs due to the elongation of the belt or rope. Similarly, when a working fluid is used, drive loss occurs due to compression, expansion, etc. of the working fluid.

When gears are used, it is difficult to manufacture the gears depending on the distance between the rotary drive shaft and the rotary driven shaft and the shaft angle, and it is also difficult to incorporate them into the device. Therefore, also in this case, the scope of application is limited.

Further, a device for transmitting a driving force using a driving force transmitting element (steel ball) continuously arranged in an endless circulation path as a driving force transmitting means is known from Patent Document 4. As a driving force transmission means, a driving force transmission element (steel ball) continuously arranged in an endless circulation path is used, and a rotating drive shaft and a rotating driven shaft are oriented in directions that intersect each other. Among them, there is no known technique for transmitting the rotational driving force of the rotary drive shaft to the rotary driven shaft as the rotary drive force. When such a driving force transmission device is used, conventionally known driving force transmission means such as the case of transmitting a driving force to a rotary driven shaft arranged in a direction intersecting the rotary drive shaft cannot cope with the problem. It has the advantage of being able to handle difficult situations.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances. It is an object of the present invention to provide a drive capable of transmission.

In order to solve the above-mentioned problems, the driving device according to the present invention of claim 1 is provided with an endless circulation path in a housing in which a rotating drive shaft and a rotating driven shaft are provided in directions that intersect each other, and rolling is performed in this endless circulation path. A driving device for transmitting a rotational driving force from the rotary drive shaft to the rotary driven shaft by using a plurality of driving force transmitters, wherein a part of the rotary drive shaft faces the endless circulation path. A sprocket for continuously sending the driving force transmitter toward the rotary driven shaft is provided, and a part of the rotary driven shaft faces the endless circulation path, and the transmission from the sprocket through the endless circulation path is provided. A sprocket rotor is provided which is urged to rotate by the sent driving force transmitter and simultaneously sends out toward the sprocket of the rotary drive shaft via the endless circulation path.

According to a second aspect of the present invention, there is provided a driving device according to the first aspect, wherein a sprocket rotor is attached to the side of the rotating drive shaft.

According to a third aspect of the present invention, there is provided a driving device according to the first aspect, wherein a sprocket rotor is attached to the rotary drive shaft side, and a sprocket is attached to the rotary driven shaft side.

According to a fourth aspect of the present invention, the drive device is characterized in that the sprocket is provided on its outer peripheral surface with a spherical dimpled driving force transmitter fitting hole into which the driving force transmitter is fitted.

According to a fifth aspect of the present invention, there is provided a driving device in which the sprocket is provided with a driving force transmitter fitting hole having a flat bottom surface into which the driving force transmitter is fitted on the outer peripheral surface thereof.

According to a sixth aspect of the present invention, there is provided a driving device, wherein a groove having a semicircular cross-section into which the driving force transmitting element is fitted is provided on the outer peripheral surface of the sprocket rotor in a spiral shape in the axial direction. do.

According to a seventh aspect of the present invention, there is provided a driving device, wherein a semicircular groove into which the driving force transmitter is fitted is provided in the axial direction on the outer peripheral surface of the sprocket rotor.

According to an eighth aspect of the present invention, the driving device is characterized in that the endless circulation path is formed of a tube installed in the housing except for a portion where the sprocket and the sprocket rotor are fitted. .

According to a ninth aspect of the present invention, the drive device is characterized in that the endless circulation path is a communication path formed in the housing except for a portion where the sprocket and the sprocket rotor are fitted.

According to a tenth aspect of the present invention, the drive device is characterized in that the endless circulation path is formed linearly between the sprocket and the sprocket rotor.

According to the first aspect of the present invention, when the sprocket rotates due to the rotation of the rotary drive shaft, the drive-side driving force transmitter fitting portion applies a driving force to the driving force transmitter, and the driving force transmitter is disposed in the endless circulation path. A series of driving force transmitters are pushed to move along an endless circulatory path. At this time, the sprocket rotor is rotationally driven via the driven side driving force transmission element fitting portion, and the rotary driven shaft is rotationally driven. In this manner, a series of drive transmission elements transmit rotary drive from the rotary drive shaft to the rotary driven shaft.

According to the first aspect of the present invention, the rotation is transmitted from the rotary drive shaft to the rotary driven shaft by driving the series of driving force transmitters in the endless circulation path. can be applied to any positional relationship, and the range of application is wide. Moreover, since the rotational driving force is transmitted by the driving force transmitter, the friction can be reduced, and the driving loss can be suppressed.

By the way, in the present invention of Claim 1, the drive-side driving force transmission element fitting portion and the driven-side driving force transmission element fitting portion are continuous on the circumference around the respective axes of the sprocket and the sprocket rotor. Correspondingly, the driving-side driving force transmitting element guide groove and the driven-side driving force transmitting element guide groove are also disposed on the circumference centering on the respective axes of the sprocket and the sprocket rotor. is preferred. With this configuration, the rotational force of the sprocket is efficiently transmitted to the driving force transmitter through the drive side driving force transmitter fitting portion, and the moving force of the series of driving force transmitters is transferred to the driven side driving force. This is because the power is efficiently transmitted to the sprocket rotor via the transmission element fitting portion.

Next, in the drive device according to the present invention of claim 2, since sprocket rotors are used for both the rotary drive shaft and the rotary driven shaft, if the diameters of the sprocket rotors of both are the same, the communication path has less friction. It can be constructed linearly and parallelly.

Next, according to a third aspect of the present invention, there is provided a driving device in which a sprocket rotor is used on the rotary drive shaft side and a sprocket is used on the rotary driven shaft side.

Next, according to the fourth aspect of the present invention, there is provided a driving device which is easily fitted to the spherically formed driving force transmitter.

According to the fifth aspect of the present invention, the object of the present invention can be achieved even with such a configuration.

The driving device according to the sixth aspect of the present invention can achieve the object of the present invention even with such a configuration.

In the driving device according to the seventh aspect of the present invention, since the driving force transmitter guide groove is formed along the moving direction of the driving force transmitter, the driving force transmitter moves more smoothly.

According to the eighth aspect of the present invention, since the dedicated tube forming the endless circulation path is provided in the housing, the selection range of materials for the housing is widened and the manufacturing cost can be reduced.

According to the ninth aspect of the present invention, there is an advantage that the endless circulation path can be easily formed.

According to the tenth aspect of the present invention, even with such a configuration, the object of the present invention can be achieved.

BRIEF DESCRIPTION OF THE DRAWINGS It is the whole perspective view which saw through the inside of the drive device which concerns on Example 1 of this invention. FIG. 2 is a perspective view showing only the internal structure of FIG. 1; FIG. 2 is a view of the driving device in FIG. 1 as seen from the arrow A; FIG. 3 is a view of the driving device of FIG. 2 as seen from the arrow A; FIG. 2 is a view of the driving device of FIG. 1 as viewed from arrow B; FIG. 3 is a view of the driving device of FIG. 2 as viewed from arrow B; It is C arrow view of the drive device of FIG. FIG. 3 is a C arrow view of the drive device of FIG. 2 ; It is explanatory drawing which shows the modification of the drive device which concerns on Example 2 of this invention. It is explanatory drawing which shows the modification of the drive device which concerns on Example 3 of this invention.

Embodiments for carrying out the present invention will be described below based on the drawings.

According to the drawings, in FIGS. 1 to 8, the driving device 10 according to the first embodiment is provided with an endless circulation path 20 in a housing 13 in which a rotary drive shaft 11 and a rotary driven shaft 12 are provided in mutually intersecting directions. , which uses a plurality of driving force transmitters 18, 18, 18, . A sprocket 15 is provided on the rotary drive shaft 11 so that a part thereof faces the endless circulation path 20 and continuously sends out the driving force transmission elements 18, 18, 18, . . . . . sent from the sprocket 15 through the endless circulating path 20 from the sprocket 15 through the sprocket 15. A sprocket rotor 16 is provided for feeding toward the sprocket 15 of the rotary drive shaft 11 via the circulation path 20 . Details are given below.

That is, the drive device 10 according to the present invention includes a rotary drive shaft 11, a rotary driven shaft 12, a housing 13, an endless circulation path 20, and a large number of steel balls, for example, filled in the endless circulation path 20. driving force transmitters 18, 18, 18 . . . The housing 13 rotatably holds the rotary drive shaft 11 and the rotary driven shaft 12 . The rotary drive shaft 11 and the rotary driven shaft 12 are crossed at right angles to each other at a predetermined distance. As the driving force transmitter, a roller or a disc can be used instead of the steel ball.

As an example, the housing 13 is formed by a combination of a first housing piece 13a and a second housing piece 13b having the same size and shape, and the first housing piece 13a and the second housing piece 13b are screwed together by screws (not shown). It is fixed together. The dividing line between the first housing piece 13a and the second housing piece 13b divides the rotary drive from the direction perpendicular to the shaft portion on the shaft 11 side, and divides it axially on the rotary driven shaft 12 side. there is A rotary drive shaft 11 is rotatably held on the upper side of the housing 13, and a rotary driven shaft 12 is rotatably held on the lower side of the housing 13 so as to be perpendicular to the rotary drive shaft 11 and spaced apart.

The rotary drive shaft 11 is formed as a spline shaft for coupling with the counterpart member, and the rotary driven shaft 12 is formed as a cylindrical body having a screw hole for coupling with the counterpart member, but is limited to these. not a thing

A sprocket 15 and a sprocket rotor 16 are rotatably held within the housing 13 . The sprocket 15 is formed integrally with the rotary drive shaft 11 on the same axis X, and always rotates together with the rotary drive shaft 11 . The sprocket rotor 16 is formed integrally with the rotary driven shaft 12 on the same axis Y, and always rotates together with the rotary driven shaft 12 .

The sprocket 15 is a disc body having a larger diameter than the rotary drive shaft 11 . A drive-side driving force transmitter fitting portion 17 is continuously formed on the outer peripheral surface of the sprocket 15 . As an example, the drive-side driving force transmitter fitting portion 17 is a spherical dimple-shaped driving force transmitter formed of a portion of a spherical surface corresponding to the driving force transmitters 18, 18, 18, . . . It is a set of fitting holes 17a. The drive-side driving force transmitter fitting portion 17 is formed by arranging driving force transmitter fitting holes 17a on the outer peripheral surface of the sprocket 15 in the circumferential direction thereof. The drive-side driving force transmitter fitting portion 17 may have a spherical dimple shape, or may be a set of driving force transmitter fitting holes having a flat bottom surface.

The sprocket rotor 16 is a disc body having a larger diameter than the rotary driven shaft 12 . A driven-side driving force transmitter fitting portion 19 is continuously formed on the outer peripheral surface of the sprocket rotor 16 . As an example, the driven-side driving force transmitter fitting portion 19 has a substantially semicircular cross section corresponding to the driving force transmitters 18, 18, 18 . It is a set of a plurality of provided driving force transmitter fitting grooves 19b.

The driving force transmitters 18, 18, 18, . 10 endless circulation paths 20 are continuously arranged in series. This series of drive force transmitters 18 , 18 , 18 .

The sprocket 15 and the sprocket rotor 16 form a driving force transmitting element transmission device in combination with a series of driving force transmitting elements, following a chain transmission device known per se composed of a combination of a chain and a chain sprocket. It can be called a driving force transmission element sprocket.

The endless circulation path 20 is formed on the inner surface of the housing 13 so as to continuously guide the driving force transmitters 18, 18, 18, . . . It has a transmitter guide groove 21 . The driving-side driving force transmitting element guide groove 21 extends over approximately half of the outer peripheral surface of the sprocket 15 . Similarly, the endless circulation path 20 guides the driving force transmitters 18 , 18 , 18 . . . It has a transmitter guide groove 22 . The driven-side driving force transmitting element guide groove 22 extends over approximately half of the outer peripheral surface of the sprocket rotor 16 . Reference symbols 21a, 21a and 22a, 22a are the end portions of the drive side drive force transmitter engagement groove 21 and the driven side drive force transmission element engagement groove 22, respectively.

In Embodiment 1, both the drive-side driving force transmitter guide groove 21 and the driven-side driving force transmitter guide groove 22 are formed as grooves having hemispherical cross-sectional shapes corresponding to the driving force transmitters 18, 18, 18, . . . However, it is not limited to this, and can also be formed as a groove having a U-shaped cross section corresponding to the driving force transmitters 18, 18, 18, . . . .

The driving-side driving force transmitter guide groove 21 and the driven-side driving force transmitter guide groove 22 are connected by two communicating passages 23 , 23 that similarly form the endless circulation path 20 . As a result, a series of driving force transmitters 18, 18, 18 . An endless circulation path 20 for is formed. The endless circulation path 20 is filled with grease for lubricating the driving force transmitter. In the embodiment, both communicating paths 23, 23 are formed as circular communicating paths whose inner peripheral surfaces correspond to the driving force transmitters 18, 18, 18, . . . , but are not limited to this. , the shape of the inner peripheral surface of which corresponds to the driving force transmitters 18, 18, 18 . . . Each communication path 23 may be formed by combining the housing pieces 13a and 13b, or may be formed by fixing a rigid tube inside the housing 13. . Indicative symbols 23a, 23a indicate respective ends of the communication paths 23, 23. As shown in FIG.

When the rotary drive shaft 11 is rotated, the sprocket 15 rotates, so that the drive-side driving force transmitter fitting portion 17 applies driving force to the driving force transmitters 18 , 18 , 18 . The driving force transmitters 18, 18, 18, . The sprocket rotor 16 is driven to rotate by fitting into the portions 19 one after another. Thereby, the rotary driven shaft 12 is rotationally driven. Transmission of rotation from the rotary drive shaft 11 to the rotary driven shaft 12 is possible in both forward and reverse directions.

According to the present invention, the rotation is transmitted from the rotary drive shaft 11 to the rotary driven shaft 12 by driving the series of driving force transmitters 18, 18, 18, . . . in the endless circulation path 20. It can be applied regardless of the positional relationship between the rotary drive shaft 11 and the rotary driven shaft 12, and has a wide range of applications. Further, since the rotational driving force is transmitted by the driving force transmitters 18, 18, 18 .

Further, according to the configuration of the first embodiment, both ends 22a, 22a of the driven-side driving force transmitting element guide groove 22 are positioned apart from each other in the direction of the axis Y of the sprocket rotor 16. Therefore, as is clear from FIG. In addition, the endless circulation path 20 can be formed without giving a sharply curved shape only to the communication path 23 . Therefore, regardless of the positional relationship between the rotary drive shaft 11 and the rotary driven shaft 12, the endless circulation path 20 can be made into a gently curved shape as a whole without sharp curves. As a result, transmission loss of the rotational driving force from the rotary drive shaft 11 to the rotary driven shaft 12 can be minimized, and the communication paths 23, 23 can be easily manufactured.

Further, according to the first embodiment, as shown in FIG. 4, the driven side driving force transmitter fitting portion 19 has a driving force transmitter fitting groove extending in a direction intersecting the circumferential direction of the sprocket rotor 16. The sprocket rotor 16 can be used as a general-purpose product because it is formed by a parallel and continuous assembly of 19b.

FIG. 9 shows yet another embodiment of the sprocket rotor. According to the drawings, in the sprocket rotor 30 according to the second embodiment, the driven side driving force transmitter fitting portion 31 is formed by parallel and continuous driving force transmitter fitting grooves 31 a extending in the axis Y direction of the sprocket rotor 30 . It can also be formed by an arbitrary set. That is, each driving force transmitting element fitting groove 31 a forming the driven side driving force transmitting element fitting portion 31 is perpendicular to the circumferential direction of the sprocket rotor 30 . Also in this case, the same effects as those of the first embodiment can be obtained.

FIG. 10 shows another embodiment of the drive device according to the invention. As shown in a simplified manner in FIG. 10, a driving device 35 according to the third embodiment includes a sprocket rotor 36 and a sprocket rotor 37 having lengths in the directions of the axes X and Y on both the driving side rotating shaft and the driven side rotating shaft. is used, and the driving force transmitter fitting portion of each embodiment described above is provided on the outer circumference of each sprocket rotor 36 and sprocket rotor 37 . By doing so, the extending shape of the communication path 23 of the first embodiment can be further simplified, and the communication path 23 can be made straight.

In addition, the drive device 10 or 35 according to the present invention has less drive loss because the drive force transmitter is a rigid body as compared with a conventional transmission system using a working fluid such as a belt, rope, chain, gear, air, or fluid. There is an advantage. In addition, since problems such as elongation caused by belts, ropes, chains, etc., and compression/expansion caused by working fluid do not occur, drive loss can be suppressed in this respect as well.

Furthermore, unlike gears, there is no problem that it may be difficult to manufacture gears depending on the positional relationship (the distance between the shafts and the shaft angle) between the rotary drive shaft and the rotary driven shaft. In the case of gears, even if the shape of the gear is limited and manufacturing is difficult, the system of the present invention allows the sizes of the sprocket and the sprocket rotor to be freely changed, making it easy to incorporate into the device.

Furthermore, according to the method of the present invention, the positional relationship between the rotary drive shaft and the rotary driven shaft can be freely set three-dimensionally, the reduction ratio can be freely combined, and maintenance is unnecessary or easy. There are various merits such as being compact in terms of space.

INDUSTRIAL APPLICABILITY The driving device according to the present invention can be used in various fields such as winding devices for fishing line and the like, opening and closing drive mechanisms for residential windows, industrial machinery, transportation machinery, and the like. In particular, when it is desired to realize a rapid angle change between the rotary drive shaft and the rotary driven shaft in a narrow space, it is possible to cope with situations that are difficult to deal with with the conventional transmission system. Therefore, the possibility of application and development to other fields is extremely high.

Reference Signs List 10, 35 drive device 11 rotary drive shaft 12 rotary driven shaft 13 housing 15 sprocket 16, 30, 36, 37 sprocket rotor 17 drive side drive force transmitter fitting portion 17a drive force transmitter fitting hole 18 drive force transmitter 19 , 31 driven side driving force transmitter fitting portion 19b driving force transmitter fitting groove 20 endless circulation path 21 driving side driving force transmitter guide groove 22 driven side driving force transmitter guide groove 23 communication path 31a driving force transmitter fitting matching groove

Claims (9)

An endless circulation path is provided in a housing in which a rotary drive shaft and a rotary driven shaft are provided in mutually intersecting directions, and a plurality of driving force transmitters rolling in the endless circulation path are used to transmit power from the rotary drive shaft to the rotary driven shaft. A sprocket for transmitting a rotational driving force to a shaft, wherein a part of the rotational driving shaft faces the endless circulating path to continuously send out the driving force transmitter toward the rotational driven shaft. and a portion of the rotary driven shaft faces the endless circulation path, and is urged to rotate by a driving force transmitter sent from the sprocket through the endless circulation path, and at the same time, the endless circulation path A sprocket rotor that feeds out toward the sprocket of the rotary drive shaft through is provided , and on the outer peripheral surface of the sprocket rotor, a driving force transmitter fitting groove having a semicircular cross section for fitting the driving force transmitter is provided. A driving device, characterized in that it is provided in a spiral shape in a direction . 2. A drive unit as claimed in claim 1, characterized in that a sprocket rotor is mounted on the side of the rotary drive shaft. 2. The driving device according to claim 1, wherein a sprocket rotor is attached to said rotary drive shaft and a sprocket is attached to said rotary driven shaft. 2. The driving device according to claim 1, wherein said sprocket is provided with a spherical dimple-shaped driving force transmitter fitting hole into which said driving force transmitter is fitted on the outer peripheral surface of said sprocket. 2. The driving device according to claim 1, wherein the sprocket is provided with a driving force transmitter fitting hole having a flat bottom surface for fitting the driving force transmitter on the outer peripheral surface thereof. 2. The drive according to claim 1, wherein a semi-circular driving force transmitter fitting groove for fitting said driving force transmitter is provided in an axial direction on an outer peripheral surface of said sprocket rotor. Device. 2. The driving device according to claim 1, wherein said endless circulation path is formed of a tube installed in said housing except for a portion where said sprocket and said sprocket rotor are fitted. 2. The driving device according to claim 1, wherein said endless circulation path is a communication path formed in said housing except for a portion where said sprocket and said sprocket rotor are fitted. 3. The driving device according to claim 2 , wherein the endless circulation path is formed linearly between the sprocket rotors .

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