JP5268726B2 - Rotational motion transmission device and automotive steering device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a rotational motion transmission device with high installation working efficiency. <P>SOLUTION: The rotational motion transmission device includes an input side drum, an input side housing for housing the input side drum, an output side drum, an output side housing for housing the output side drum, and two cables for transmitting the rotation of the input side drum to the output side drum. The two cables are respectively wound on the outer circumferences of a steering wheel side drum and a steered side drum in different winding directions, and wound up and drawn out to alternately apply a tensile force in accordance with a forward/reverse rotation of the steering wheel side drum. At least one of the input side drum and the output side drum is configured in a combination of two coaxial pulleys. One cable is wound on the outer circumference of one of the two pulleys, and the other cable is wound on the outer circumference of the other pulley. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

  The present invention relates to a rotational motion transmission device that transmits rotation of an input drum to an output drum using two cables, and an automotive steering device including the rotational motion transmission device.

  Patent Document 1 is an open patent publication relating to a rotary motion transmission device that was previously developed and applied for a patent by the present applicant. The rotational motion transmission device of Patent Document 1 is used in an automobile steering device. This rotational motion transmission device includes a handle-side drum connected to a shaft of a handle, a steering-side drum connected to a shaft of a front wheel steering mechanism, and two cables. The handle side drum and the steering side drum are housed in housings, respectively. The two cables are inserted in two cylindrical outer casings disposed between the drum side housing and the steering side housing so as to be able to reciprocate. The two cables are wound around the outer circumferences of the handle-side drum and the steering-side drum in different winding directions, and are wound and pulled out so that a tensile force acts alternately as the handle-side drum rotates in the forward and reverse directions. Is to be done. In this apparatus, when the handle is rotated in one direction, the handle-side drum rotates in one direction. As a result, one of the two cables is wound around the handle side drum and the other is pulled out from the handle side drum. At the same time, in the steering drum, one of the two cables is pulled out and the other is wound up. Thereby, the handle side drum rotates and the rotation of the handle is transmitted to the steering side. When the handle is rotated in the other direction, the rotation of the handle is transmitted to the steering side in the same manner.

Japanese Patent Laid-Open No. 10-53148

In the rotational motion transmission device described in Patent Document 1, the assembly work of the drum into the housing has been performed as follows.
First, the ends of the two outer casings are attached to the two through holes of the housing body, and the two cables drawn from the ends of the two outer casings are drawn into the housing body through the through holes. Next, the two drawn cables are attached to the drum at their ends and wound in different winding directions. Next, the drum around which the cable is wound is accommodated in the housing body and covered with the housing cover.

  In such a rotational motion transmission device, in order to transmit the rotation of the handle side drum to the steering side drum with good responsiveness, it is necessary to pass the cable between the handle side drum and the steering side drum without slack. For this reason, when performing the operation | work which winds the edge part of a cable around a drum, or the operation | work which assembles | assembles the drum which wound the cable in a housing main body, the length of the cable pulled in a housing main body cannot be lengthened. As a result, there are many cases where it is difficult to perform the above operations, and there has been a request for improvement.

  The present invention has been made in view of the above circumstances, and provides a rotary motion transmission device with good workability for assembling a drum into a housing.

The rotational movement transmission device of the present invention includes an input drum, an input housing that houses the input drum, an output drum, an output housing that houses the output drum, and the output drum that rotates the input drum. Two cables (that is, a first cable and a second cable) are provided.
One end of the first cable is wound around the outer periphery of the input side drum in the first winding direction, while the other end is wound around the outer periphery of the output side drum in the second winding direction. One end of the second cable is wound around the outer periphery of the input side drum in the direction opposite to the first winding direction, while the other end is wound around the outer periphery of the output side drum in the direction opposite to the second winding direction. Wrapped.
Each of the input side housing and the output side housing is formed with two through holes for drawing each of the first cable and the second cable into the housing.
At least one of the input side drum and the output side drum is a combination of two coaxial pulleys, and the first cable is wound around one outer periphery of the two pulleys, and the other pulley has an outer periphery. A second cable is wound.

In this rotational motion transmission device, at least one of the input side drum and the output side drum is a combination of two pulleys that are coaxial, and the first cable is wound around one outer periphery of the two pulleys. The second cable is wound around the outer periphery of the other pulley.
Since two cables can be separately wound around different pulleys, the two cables can be easily wound in different winding directions. Further, since the pulleys around which the cables are wound can be assembled one by one in the housing, the assembling work into the housing becomes easier than in the prior art. Therefore, workability is improved as compared with the conventional case.
Furthermore, if the two pulleys to be combined have the same structure, it is not necessary to distinguish between them during assembly work, which contributes to cost reduction.

  The rotational motion transmission device of the present invention is a device in which two housing halves are combined on a side housing formed by combining two pulleys, and each housing half is provided with a through hole. It is preferable that

Since the housing on the side constructed by combining two pulleys is divided into two housing halves, the two pulleys around which the cable is wound are accommodated in the two housing halves, and the two pulleys are combined. When the drum is formed and the two housing halves are combined, a housing in which the drum is accommodated can be formed. Therefore, the work of incorporating the drum into the housing becomes easier than in the prior art.
Further, if the two housing halves to be combined are of the same shape, the labor for manufacturing the housing halves can be reduced and the cost can be reduced.

The rotational motion transmission device of the present invention further includes a shaft that is attached to a drum on the side formed by combining two pulleys coaxially with the rotation shaft of the drum and rotates integrally with the drum. it can. In this case, at least one of the two pulleys is provided with a shaft hole into which the shaft is fitted, and the shaft is formed in a cross-sectional shape that is not rotatable relative to the shaft hole provided in the pulley. preferable.
Here, “relative rotation with shaft hole” means that when the shaft is inserted into the shaft hole of the pulley, the shaft does not rotate relative to the pulley, and if the shaft is rotated, the pulley moves along with the rotation. A state that always rotates. For example, a shaft having a square cross section with respect to a square shaft hole corresponds to this.

Since the shaft is formed in a cross-sectional shape that cannot rotate relative to the shaft hole provided in each pulley, when the shaft is inserted into the shaft hole of the pulley, the mounting direction of the pulley with respect to the shaft is determined. Depending on the shape of the shaft and the shaft hole, if the pulley is rotated by a predetermined angle in the circumferential direction and the shaft is inserted through the shaft hole, the mounting direction of the pulley relative to the shaft can be easily changed. For example, when the shaft has a square cross section, the pulley can be attached to the shaft in four ways.
By making the shaft hole of the shaft and the pulley have such a structure, the direction in which the cable is pulled out from each pulley can be easily changed. For this reason, various cable routing paths can be realized.

  The rotational motion transmission device of the present invention is provided with a guide that is detachably provided on the inner wall surface of the housing that is configured by combining two pulleys and that can guide the cable drawn from each pulley to the through hole. Is preferred.

  A gap provided between the inner wall surface of the housing and the outer peripheral surface of each pulley can be filled with the guide, and the cable can be guided to the through hole by the guide. For this reason, the cable pulled out from each pulley is guided to the through hole without being shaken, and the wound cable is difficult to drop off from the pulley. Further, since the guide can be attached to and detached from the inner wall surface of the housing, the guide does not hinder the assembling work.

  The rotational motion transmission device of the present invention preferably includes a spring that urges each pulley toward the axial center side of the housing between one surface of each pulley and the inner wall surface of the housing.

  In this type of rotational motion transmission device, the drawing position where the cable is drawn from each pulley and the winding position where the cable is taken up move in the axial direction as the cable is taken up and pulled out as the drum rotates. Along with this movement, the frictional force generated between the cable and the through hole of the housing may increase. In this case, in this rotational motion transmission device, the drum can be displaced in the axial direction by the deformation of the spring according to the frictional force, and the frictional force applied to the cable can be reduced.

  The automobile steering device of the present invention includes any one of the rotational motion transmission devices.

  Since the rotational motion transmission device having the above features is used in a vehicle steering device, it is possible to realize a vehicle steering device with good workability for assembling the drum into the housing.

  According to the present invention, it is possible to provide a rotary motion transmission device with good assembling workability and an automobile steering device using the same.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a partially cutaway perspective view showing an outline of an automotive steering apparatus according to a first embodiment of a rotary motion transmission device of the present invention. The disassembled perspective view which shows typically the principal part of the steering device for motor vehicles based on 1st Example. The perspective explanatory view showing the winding state of the one inner cable around the first pulley. The perspective explanatory view showing the winding state around the second pulley of the other inner cable. FIG. 3 is a partially cutaway perspective view schematically showing an example of cable routing in the automotive steering apparatus according to the first embodiment. The disassembled perspective view which shows typically the principal part of the steering device for motor vehicles based on 2nd Example of the rotational motion transmission apparatus of this invention. The perspective view which shows the other shape of a guide member. The disassembled perspective view which shows typically the principal part of the steering device for motor vehicles concerning 3rd Example of the rotational motion transmission apparatus of this invention. The figure which shows the other example of the combination of the cross-sectional shape of a shaft, and the shape of the shaft hole of a pulley. The figure which shows the other example of the combination of the cross-sectional shape of a shaft, and the shape of the shaft hole of a pulley. The figure which shows the other example of the combination of the cross-sectional shape of a shaft, and the shape of the shaft hole of a pulley.

The technical features of this embodiment described below are listed.
(Embodiment 1) The first pulley and the second pulley that constitute the drum are the same pulley, are arranged in the opposite direction with the back side facing each other, and are combined with each other to constitute the drum.
(Mode 2) The first housing half and the second housing half constituting the housing are the same housing half, arranged oppositely with the openings facing each other, and combined with each other to form the housing Yes.
(Mode 3) A cable provided in the steering apparatus for an automobile of the present embodiment is a cylindrical outer casing and a control cable in which an inner cable is inserted into the outer casing so as to be able to reciprocate.
(Mode 4) The cross-sectional shape of the shaft is formed such that two planes face each other. The shaft hole of each pulley is also formed in a corresponding shape so that the shaft cannot rotate relative to the shaft hole of the pulley.

(First Embodiment) A first embodiment of the rotary motion transmission device of the present invention will be described below. The rotational motion transmission device of the present embodiment is used in an automobile steering device. FIG. 1 is a partially cutaway perspective view showing an outline of the automobile steering apparatus of the present embodiment.
As shown in FIG. 1, the steering apparatus for an automobile of this embodiment includes a handle side housing 4a provided in front of the handle 2 of the automobile and a steering side housing 4b provided on the steering mechanism 8 side of the front wheel 6. I have. Two control cables 12a and 12b are routed between the housings 4a and 4b. The handle side housing 4a and the steering side housing 4b are the housings 4 having the same structure.

  The control cables 12a and 12b include cylindrical outer casings 14a and 14b, and inner cables 16a and 16b inserted into the outer casings 14a and 14b so as to be reciprocally movable. As shown in FIG. 1, the end portions of the outer casings 14 a and 14 b are fixed to the housings 4 a and 4 b with a cylindrical fixture 18. When the outer casings 14a and 14b are fixed to the housings 4a and 4b, the inside of the outer casings 14a and 14b and the through holes 20 (see FIG. 2) of the housings 4a and 4b communicate with each other.

  Inner cables 16a and 16b are drawn out from the ends of the outer casings 14a and 14b fixed to the housings 4a and 4b. The inner cables 16a and 16b are led into the housings 4a and 4b through the through holes 20. One end of the inner cable 16a is wound around the outer periphery of the handle-side drum 24a in the first winding direction, while the other end is wound around the outer periphery of the steering-side drum 24b in the second winding direction. One end of the other inner cable 16b is wound around the outer periphery of the handle-side drum 24a in a winding direction opposite to the first winding direction, while the other end is wound around the outer periphery of the steering-side drum 24b opposite to the second winding direction. It is wound in the winding direction. The structure of the drum 24 and the winding structure of the inner cable 16 will be described in detail later.

  The handle side housing 4a and the steering side housing 4b are the housings 4 having the same structure. As shown in FIG. 2, the housing 4 is configured by combining a first housing half 26a and a second housing half 26b. As shown in FIG. 2, the first housing half 26a and the second housing half 26b have the same structure. The two housing halves 26a, 26b having the same structure are combined with each other in the opposite orientation to form one housing 4.

  As shown in FIG. 2, the housing half 26 is formed in a container shape with one surface opened. The housing half 26 is provided with a shaft hole 28 through which the shaft 22 can be rotatably inserted. A bearing insertion portion 32 into which the bearing 30 shown in FIG. 2 can be inserted is formed inside the housing half 26 and around the shaft hole 28. A through hole 20 is provided on the outer peripheral surface of the housing half 26. The outer casing 14 is fixed to the through hole 20 by the cylindrical fixture 18, and the inner cable 16 can be drawn into the housing 4 through the through hole 20. Although not shown in FIG. 2, as is apparent with reference to FIG. 6, which shows a housing half 26 having a similar structure, the opening edge of the housing half 26 has tongues in three circumferential directions. Pieces 33a to 33c are provided. Each tongue piece 33a to 33c is provided with a bolt hole 34 for connecting and fixing to the other housing half 26. Further, the tongue piece 33a is provided with a convex portion 36 for positioning when combined with the other housing half body 26, and the tongue piece 33b is fitted with the convex portion 36 of the other housing half body 26 for positioning. Possible locking holes 38 are provided.

  The first housing half 26a and the second housing half 26b are combined to form one housing 4 as follows. First, the first housing half 26a and the second housing half 26b are provided with their openings facing each other. Next, the openings of the two housing halves 26a and 26b are aligned with each other, and the positioning projections 36 are fitted into the locking holes 38 for positioning. Finally, a bolt is inserted into the bolt hole 34, the opening is sealed, and the housing 4 is formed.

  A drum 24 is accommodated in the housing 4. In the present embodiment, the handle side drum 24a and the steering side drum 24b are the drums 24 having the same structure. As shown in FIG. 2, the drum 24 is configured by combining two coaxial first and second pulleys 40a and 40b. The first pulley 40a and the second pulley 40b are also pulleys 40 having the same structure. Both pulleys 40a and 40b having the same structure are combined with each other in the opposite direction to form one drum 24.

As shown in FIG. 2, the pulley 40 is formed in a substantially disc shape. A protrusion 42 a is provided at the center of the pulley 40. A shaft hole 42 is provided in the protruding portion 42 a, and the shaft 22 can be inserted into the shaft hole 42. A locking groove 46 that locks and fixes the end of the inner cable 16 is provided on the rear surface side (inner surface side) 44. Further, the rear surface 44 is provided with a convex portion 48 and a concave portion 50 for connecting and fixing to the other pulley 40. A spiral groove 52 for winding the inner cable 16 is provided on the outer peripheral surface of the pulley 40. A bearing housing groove 56 for housing the end of the bearing 30 is provided on the front surface side (outer surface side) 54 of the pulley 40.
When the first pulley 40a and the second pulley 40b are aligned with the back side 44 facing each other and arranged in the opposite direction, the convex portion 36 is fitted into the locking hole 38 and the pulleys 40a and 40b are combined, the drum 24 is formed.

  One inner cable 16a is wound around the first pulley 40a, and the other inner cable 16b is wound around the second pulley 40b. That is, as shown in FIG. 3, the inner cable 16 a is spirally wound along the spiral groove 52 on the outer peripheral surface of the first pulley 40 a, and the end is locked to the locking groove 46 on the back surface side 44. . On the other hand, as shown in FIG. 4, the inner cable 16 b is spirally wound along the spiral groove 52 on the outer peripheral surface of the second pulley 40 b, and the end is locked to the locking groove 46 on the back surface side 44. . When the first pulley 40a and the second pulley 40b are combined, the winding directions of the inner cables 16a and 16b are reversed. The two inner cables 16a and 16b are alternately wound and pulled out with the rotation of the drum 24 formed by combining the pulleys 40a and 40b.

  As shown in FIG. 2, a bearing 30 can be fitted into the bearing fitting portion 32 provided in the housing half 26. When the bearing 30 is inserted into the bearing insertion portion 32, the outer cylinder 30 b of the bearing 30 is fixed to the bearing insertion portion 32. Further, the end surface of the bearing 30 protruding from the bearing insertion portion 32 is accommodated in a bearing accommodating groove 56 provided on the surface side 54 of the pulley 40. In a state where the bearing 30 is housed in the bearing housing groove 56, the inner cylinder 30 a of the bearing 30 is fitted into the protruding portion 42 a of the pulley 40. Accordingly, the shaft 22 inserted through the shaft hole 42 is supported so as to be rotatable relative to the housing 4.

  The shaft 22 passes through the shaft hole 42 of each pulley 40, the shaft hole 28 of each housing half 26, and the bearing 30. The shaft 22 is attached coaxially with the rotation shaft of each pulley 40 (drum 24), and rotates integrally with the drum 24. In this embodiment, as shown in FIG. 2, the shaft 22 is formed in a cross-sectional shape in which two planes face each other. The cross-sectional shape of the shaft 22 corresponds to the shape of the shaft hole 42 provided in the pulley 40. Therefore, when the shaft 22 is inserted into the shaft hole 42, the shaft 22 cannot rotate relative to the pulley 40. On the other hand, the shaft 22 is supported so as to be rotatable relative to the housing 4. Accordingly, the drum 24 can rotate in the housing 4 as the shaft 22 rotates.

  As shown in FIG. 1, the shaft 22 is connected to the shaft of the handle 2 on the handle side. On the steering side, it is connected to the shaft of a pinion 10 provided in the steering mechanism 8 of the front wheel 6.

A procedure for housing the drum 24 in the housing 4 will be described below. Note that the drum 24 can be accommodated in the housing 4 by the same procedure on the steering wheel side and the steering side.
First, the inner cable 16a drawn from the end of the outer casing 14a is drawn into the first housing half 26a from the through hole 20. Next, the drawn inner cable 16 a is wound around the spiral groove 52 on the outer peripheral surface of the first pulley 40 a, and the end portion is fixed to the locking groove 46. Next, the first pulley 40a around which the inner cable 16a is wound is accommodated in the first housing half 26a, and the bearing 30 is fitted into the bearing fitting pipe 32 inside the first housing half 26a.

  Similarly, also on the other side, the inner cable 16b is wound around the spiral groove 52 on the outer peripheral surface of the second pulley 40b, and the second pulley 40b around which the inner cable 16b is wound is accommodated in the second housing half 26b. Further, the bearing 30 is fitted into the bearing fitting tube 32 of the second housing half 26b.

  Next, the first pulley 40a and the second pulley 40b around which the inner cables 16a and 16b are wound are arranged with the back side 44 facing each other. At the same time, the first housing half 26a and the second housing half 26b are arranged with the openings facing each other. At this time, the winding directions of the inner cables 16a and 16b wound around the pulleys 40a and 40b are opposite to each other. Next, the shaft 22 is inserted through the shaft holes 42 of both pulleys 40a and 40b and the bearings 30 provided in both housing halves 26a and 26b. When the shaft 22 is inserted, the shaft 22 and the pulleys 40a and 40b cannot be rotated relative to each other.

  In this state, the convex portions 48 of both pulleys 40a and 40b are fitted into the concave portions 50 and combined to complete the drum 24. Further, the openings of the housing halves 26a and 26b are aligned with each other, and the positioning projections 36 are fitted into the locking holes 38 for positioning. Finally, a bolt is inserted into the bolt hole 34, the opening is sealed, and the housing 4 is completed.

The operation of the steering device of this embodiment will be described below.
When the handle 2 is rotated in one direction, one of the two inner cables 16a and 16b wound around the handle side drum 24a and the steering side drum 24b is wound around the handle side drum 24a. Assuming that the inner cable 16a is wound, a tensile force acts on the inner cable 16a on the winding side. At the same time, the inner cable 16a is fed out from the steering drum 24b, and the steering drum 24 and the shaft 22 rotate in one direction. At this time, the inner cable 16b on the other side is drawn out from the handle side drum 24a and wound around the steering side drum 24b.

  When the shaft 22 of the steering drum 24b rotates in one direction, the pinion 10 connected to the shaft 22 rotates in the same direction. In the steering mechanism 8, the rod 60 is operated in one direction by the engagement of the pinion 10 and the rack 58, and accordingly, the front wheel 6 faces one side.

  When the handle 2 is rotated in the other direction, the steering drum 24b and the shaft 22 are rotated in the other direction by the same action. Accordingly, the front wheel 6 faces the other side in the same manner as described above.

  In the steering apparatus of the present embodiment, as shown by the phantom line portion in FIG. 5, the routing route of the control cables 12a and 12b is changed by changing the installation direction of the handle side housing 4a and the steering side housing 4b. Can do.

  That is, in this embodiment, as shown in FIG. 2, the shaft 22 is formed in a cross-sectional shape in which two planes face each other. The cross-sectional shape of the shaft 22 is the same as the shape of the shaft hole 42 provided in the pulley 40. For this reason, there are two attachment directions of the shaft 22 with respect to the shaft hole 42 (that is, the drum 24). When the shaft 22 is inserted through the shaft hole 42, the shaft 22 cannot rotate relative to the pulley 40. Therefore, when the shaft 22 is inserted through the shaft hole 42 of the pulley 40, the mounting direction of the pulley 40 with respect to the shaft 22 is determined.

  Therefore, if the shaft 22 is connected to the shaft of the handle 2 or the shaft of the pinion 10, the pulley 40 is rotated 180 degrees in the circumferential direction and the shaft 22 is inserted into the shaft hole 42, the phantom line portion of FIG. As shown in FIG. 2, the direction in which the pulley 40 is attached to the shaft 22 is changed by 180 degrees. That is, the installation directions of the handle side housing 4 and the steering side housing 4 are also changed by 180 degrees.

Second Embodiment A second embodiment of the rotational motion transmission device of the present invention will be described with reference to FIG. The rotational motion transmission device of the present embodiment is also used in an automobile steering device. The basic structure of the steering device of this embodiment is also the same as that of the first embodiment (similar components are indicated using the same reference numerals).
In the steering device of the present embodiment, as shown in FIG. 6, a notch 72 is formed on the inner wall surface of the housing half 26 where the through hole 20 is formed, and an inner guide 70 is detachably provided in the notch 72. It has been. The inner guide 70 guides the inner cable 16 drawn from the pulley 40 to the through hole 20.

  The inner guide 70 is formed so as to be fitted in the notch 72 of the housing half 26 shown in FIG. The inner guide 70 is provided with a guide hole 74 that can guide the inner cable 16 drawn from the pulley 40 to the through hole 20. The inner guide 70 fills a gap provided between the cutout portion 72 of the housing half 26 and the outer peripheral surface of each pulley 40. Further, since the inner cable 16 can be guided to the through hole 20, the inner cable 16 drawn from the pulley 40 is guided to the through hole 20 without shaking. Therefore, it becomes difficult for the wound inner cable 16 to fall off the spiral groove 52 of the pulley 40. Moreover, since it attaches to the notch part 72 of the housing half body 26 so that attachment or detachment is possible, an assembly operation | work is not inhibited.

  In addition, as shown in FIG. 7, the opening part 76 by the side of the pulley of the guide hole 74 can be formed wide. In this case, even if the drawing position where the inner cable 16 is pulled out from the pulley 40 changes along the axial direction, the friction between the inner cable 16 and the guide hole 74 can be kept small.

(Third Embodiment) A third embodiment of the rotary motion transmission device of the present invention will be described with reference to FIG. The rotational motion transmission device of the present embodiment is used in an automobile steering device. The basic structure of the steering device of this embodiment is also the same as that of the first embodiment (similar components are indicated using the same reference numerals).
In the steering device of the present embodiment, as shown in FIG. 8, a spring 80 is disposed between the front side surface 54 of each pulley 40 and the inner wall surface of the housing half body 26. The spring 80 is a coil spring (pressing spring) as shown in FIG. A spring accommodating groove 82 that can accommodate one end side of the spring 80 is formed on the front side surface 54 of the pulley 40. When one end side of the spring 80 is received in the spring receiving groove 82, the spring 80 is positioned. When the drum 24 is accommodated in the housing 4 by the spring 80, the drum 24 is urged toward the axial housing center side.

  When the drum 24 rotates, the drawing position (winding position) where the inner cable 16 is drawn from each pulley 40 changes in the axial direction along with the winding and drawing of the inner cable 16 wound around the drum 24. Along with the change in the drawing position, the frictional force generated between the inner cable 16 and the through hole 20 of the housing 4 may increase. Since this frictional force generates an axial force on the drum 24, the amount of compression of the spring 80 is changed by the force. For this reason, the drum 24 is displaced in the axial direction by the change in the compression amount of the spring 80, and the frictional force acting on the inner cable 16 can be reduced.

(Other Examples) In the first example, the cross-sectional shape of the shaft 22 is a shape in which two planes face each other, the shaft hole 42 has the same shape, and the pulley 40 is attached to the shaft 22 in the circumferential direction 180. It was possible to change the degree. As a result, the installation direction of the housing 4 can be changed by 180 degrees as shown by the phantom line portion in FIG.
The installation direction of the housing 4 is changed to an installation direction other than the direction shown in the first embodiment by changing the cross-sectional shape of the shaft 22 and the shape of the shaft hole 42 of the pulley 40 to the shapes shown in FIGS. Can do.

  For example, as shown in FIG. 9, when the cross-sectional shape of the shaft 22 and the shape of the shaft hole 42 of the pulley 40 are the same square, the mounting direction of the pulley 40 with respect to the shaft 22 can be changed every 90 degrees in the circumferential direction. It becomes like this. For this reason, the installation direction of the housing 4 can be changed every 90 degrees.

  As shown in FIG. 10, if the cross-sectional shape of the shaft 22 and the shape of the shaft hole 42 of the pulley 40 are regular hexagons, the installation direction of the housing 4 can be changed every 60 degrees.

  Further, as shown in FIG. 11, the shaft 22 has a cross-sectional shape having one key protrusion 90, and the shaft 22 is positioned by inserting the key protrusion 90 into the shaft hole 42 at a plurality of positions in the circumferential direction of the circle. The key groove 92 can be shaped. In this case, the installation direction of the housing 4 can be changed according to the formation angle of the key groove 92.

  The combination of the cross-sectional shape of the shaft and the shape of the shaft hole shown in FIGS. 9 to 11 is only an example, and the cross-sectional shape of the shaft may be formed in a shape that cannot rotate relative to the shaft hole of the pulley. Any shaft and shaft hole can be used. Accordingly, the installation direction of the housing can be set to an arbitrary direction, and a desired control cable routing path can be realized.

  The use of the rotational motion transmission device of the present invention is not limited to the automobile steering device as in the above embodiments. The rotational motion transmission device of the present invention can also be used for a power window device or an electric sliding door device.

Specific examples of the present invention have been described in detail above, but these are merely examples and do not limit the scope of the claims. The technology described in the claims includes various modifications and changes of the specific examples illustrated above.
In addition, the technical elements described in the present specification or the drawings exhibit technical usefulness alone or in various combinations, and are not limited to the combinations described in the claims at the time of filing. In addition, the technology exemplified in this specification or the drawings achieves a plurality of objects at the same time, and has technical utility by achieving one of the objects.

2 Handle 4 Housing 6 Front wheel 8 Steering mechanism 10 Pinion 12 Control cable 14 Outer casing 16 Inner cable 20 Through hole 22 Shaft 24 Drum 26 Housing half 30 Bearing 40 Pulley 52 Spiral groove 70 Inner guide 80 Spring

Claims (4)

An input drum,
An input housing that houses the input drum;
An output drum,
An output housing that houses the output drum;
A first cable having one end wound around the outer periphery of the input side drum in the first winding direction and the other end wound around the outer periphery of the output side drum in the second winding direction;
A second cable having one end wound around the outer periphery of the input drum in a direction opposite to the first winding direction and the other end wound around the outer periphery of the output side drum in the direction opposite to the second winding direction. And,
Each of the input side housing and the output side housing is formed with two through holes for drawing each of the first cable and the second cable into the housing,
At least one of the input side drum and the output side drum is a combination of two coaxial pulleys, the first cable is wound around one outer periphery of the two pulleys, and the outer periphery of the other pulley a second cable is wound on,
The housing on the side constituted by combining two pulleys is a combination of two housing halves, and each housing half is provided with a through hole,
It is attached to the drum on the side constructed by combining two pulleys coaxially with the rotation axis of the drum, and further includes a shaft that rotates integrally with the drum,
A shaft hole into which the shaft is fitted is provided in at least one of the two pulleys,
A rotary motion transmission device, characterized in that the shaft is formed in a cross-sectional shape incapable of relative rotation with a shaft hole provided in the pulley . 2. The guide according to claim 1, further comprising a guide that is detachably provided on an inner wall surface of a housing that is configured by combining two pulleys and that can guide a cable drawn from each pulley to a through hole. Rotary motion transmission device. Between the one surface and the housing inner wall surface of each pulley, rotational movement transmission device according to claim 1 or 2, characterized in that it comprises a spring for urging the respective pulleys axially housing center side. An automotive steering apparatus comprising the rotational motion transmission device according to any one of claims 1 to 3 .

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