JP5224125B2 - Driving force transmission device - Google Patents

Description

  The present invention relates to a driving force transmission device.

  For example, in order to increase the starting torque (starting torque) in the electric motor, an attractive force by a magnet previously incorporated in the motor is set so that the stop position of the rotor portion with respect to the stator portion is an optimum position at which a large starting torque can be easily obtained. Inducing the stop position of the rotor portion is performed (see, for example, Patent Document 1).

JP 2003-209959 A

The above prior art is a technique to be applied from the design stage of the drive device in order to increase the starting torque of the drive device itself such as an electric motor.
Therefore, for example, in order to select a drive device having a large starting torque, there is a restriction that the drive device must be selected from commercially available drive devices.
The present invention has been made in view of the above circumstances, and an object thereof is to provide a driving force transmission device that easily obtains a necessary starting torque by being interposed in a driving force transmission system from the driving device.

A first characteristic configuration of the present invention includes: an input member that is rotatably supported for driving; an output member that is rotatably supported on a coaxial axis with the rotational axis of the input member; and a rotational axis of the input member; An intermediate member supported on a coaxial core so as to be relatively rotatable with respect to both the input member and the output member, and supported by the intermediate member so as to be swingable around a swing axis parallel to the rotation axis. A swing arm, and an engagement pin provided on the swing arm and engaged with each of the input member and the output member. The input member has a rotation diameter of the engagement pin. An input side engagement portion is provided that is movably engaged between the inner side in the direction and the outer side in the rotational radial direction, and the engagement pin is connected to the inner side in the rotational radial direction and the rotational diameter on the output member. In a direction view along the direction of the rotation axis, and movably engaged with the outer side of the direction And an output-side engagement portion that is non-parallel to the input-side engagement portion, and the rotational-diameter outer side end portion of the input-side engagement portion is in a non-rotation state with respect to the position of the engagement pin. The outer end of the output-side engagement portion in the rotational radial direction is farther from the rotation axis than the position of the engagement pin in the non-rotation state. A rotation radial direction outer side end portion of the output side engagement portion is provided to be positioned on a lower side in the rotation direction than a rotation radial direction outer side end portion of the input side engagement portion, An engagement pin movement resistance member is provided that provides resistance to movement of the engagement pin toward the outer side in the radial direction along the input side engagement portion and the output side engagement portion as the input member rotates. It is in the point.

[Action and effect]
In the driving force transmission device of this configuration, the engaging pin provided on the swing arm is engaged with each of the input member and the output member, so that the driving rotational force of the input member is transmitted via the engaging pin. Is transmitted to the output member.
The engaging pin is engaged with the input side engaging portion and the output side engaging portion that is non-parallel to the input side engaging portion, and the rotational radial direction outer side end portion of the input side engaging portion is also connected to the output side. The outer radial end of the engaging portion is also farther than the rotational axis with respect to the position of the engaging pin in the non-rotating state, and the outer radial end of the output engaging portion Is provided so as to be located on the lower side in the rotational direction with respect to the outer radial end portion of the input side engaging portion. Therefore, as the input member starts to rotate, the engaging pin becomes an intermediate member. By rotating relative to the input member and the output member and swinging the swing arm with respect to the intermediate member, along the input-side engagement portion and the output-side engagement portion, from the radially inner side to the outside in the rotational radial direction. Move towards the side edge.
With the start of rotation of the input member, the input member is moved until the engaging pin moves to the radially outer end of at least one of the input side engaging portion and the output side engaging portion. And the output member are rotated relative to each other, and when the engagement pin moves to the radially outer end of at least one of the engagement portions, further movement of the engagement pin is prevented. And the output member rotate together.
Here, when the engagement pin can move freely without any resistance along either the input side engagement part or the output side engagement part, the output member is under load, so the rotation of the input member starts. Accordingly, the engagement pin moves along the input side engagement portion and the output side engagement portion while the output member does not move following the movement of the engagement pin, that is, without rotating.
Therefore, although the input member and the output member rotate relative to each other as the input member starts rotating, the output member cannot be rotated at a reduced speed.
Therefore, an engagement pin movement resistance member is provided to restrict the movement of the engagement pin to the outer side in the rotational radial direction along the input side engagement portion and the output side engagement portion. Thus, the engaging pin can be moved along the input side engaging portion and the output side engaging portion while forcibly moving the output member following the movement of the engaging pin, that is, while rotating the output member. Thus, the output member can be decelerated and rotated with the start of rotation of the input member.
Therefore, the necessary starting torque can be easily obtained by interposing the driving force transmission device of this configuration in the driving force transmission system from the driving device.

The second characteristic configuration of the present invention is that the engagement pin movement resistance member is provided so as to give resistance to the swing of the swing arm.

[Action and effect]
For example, the input member or engaging pin moving resistance member providing resistance to relative rotation with respect to the output member of the intermediate member, when Ru tare provided over the intermediate member and the input member or the output member, assembly structure of the resistance member There is a risk of complications.
If it is this structure, it will be easy to assemble | attach a resistance member irrespective of an input member or an output member, and an assembly structure can be simplified.

According to a third characteristic configuration of the present invention, the engagement pin movement resistance member includes: an end portion of the swing arm on a side where the engagement pin is not provided across the swing shaft core; It is an elastic member that is interposed in a compression-deformed state with a housing in which the intermediate member is housed.

[Action and effect]
With this configuration, an elastic member may be attached to either the end of the swing arm on the side where the engagement pin is not provided across the swing shaft or the housing. Easy to simplify.

According to a fourth characteristic configuration of the present invention, the engagement pin movement resistance member is a spring that spans between the swing arm and the intermediate member.

[Action and effect]
With this configuration, in addition to the function of imparting resistance to the outward movement of the engagement pin in the rotational radial direction along the input-side engagement portion and the output-side engagement portion, the engagement pin is connected to the non-input member. In the rotation state, it is possible to provide a function of returning to the position where the input side engaging portion and the output side engaging portion are engaged with each other on the inner side in the rotational radial direction.

  According to a fifth characteristic configuration of the present invention, the input side engaging portion is formed in a curved line shape that curves toward the rear side in the rotational direction toward the outer side in the rotational radial direction, and the output side engaging portion is a straight line along the rotational radial direction. It is in the point formed in the shape.

[Action and effect]
With this configuration, it is easy to gradually reduce the reduction ratio by increasing the amount of rotation of the input member from when the input member starts to rotate until the input member and the output member rotate together.

  In a sixth characteristic configuration of the present invention, the engagement pin includes an input side engagement pin that engages with the input side engagement portion, and an output side engagement pin that engages with the output side engagement portion. In the point.

[Action and effect]
If it is this structure, it will be easy to set the rotation amount of an input member after starting rotation of an input member until an input member and an output member rotate integrally so that a required drive torque may be obtained.

Embodiments of the present invention will be described below with reference to the drawings.
[First Embodiment]
1 and 2 show a seat slide device A in a vehicle such as an automobile, which is equipped with a driving force transmission device B according to the present invention.

  The seat slide device A moves the upper rail 4 fixed to the seat cushion 3 and slidably supported by the lower rail 2 with respect to the lower rail 2 fixed to the vehicle floor 1 in the vehicle front-rear direction, so that the seat seat 5 The position of the vehicle in the longitudinal direction is adjusted.

  The seat slide device A includes a screw shaft 6 that is rotatably supported by the upper rail 4 and is not movable in the axial direction, a nut member 7 that is fixed to the lower rail 2 and screwed to the screw shaft 6, and the screw shaft 6. The transmission mechanism 8 connected is provided.

  As shown in FIG. 3, the transmission mechanism 8 includes a transmission housing 9, a worm gear 10 disposed in the transmission housing 9, a gear worm gear 10 disposed in the transmission housing 9, and meshed with the screw shaft 6. The wheel gear 11 is linked, the electric motor M is a driving device that drives and rotates the worm gear 10, and the driving force transmission device B according to the present invention that links the worm gear 10 and the electric motor M is provided.

  As shown in FIGS. 3 and 4, the driving force transmission device B includes an input member 12 that is rotatably supported and an output member that is rotatably supported on the same axis as the rotational axis X of the input member 12. 13, an intermediate member 14 that is supported on both the input member 12 and the output member 13 on the same axis as the rotation axis X of the input member 12, and is parallel to the rotation axis X of the input member 12. A swing arm 15 supported so as to be swingable around a swing axis Y, and an engagement pin 16 provided on the swing arm 15 and engaged with the input member 12 and the output member 13, respectively. (16a, 16b).

  The input member 12 includes a circular input rotation plate 17 and front and rear rotation support shafts 18a and 18b. The output member 13 includes a circular output rotation plate 19 and front and rear rotation support shafts 20a and 20b. Both the input rotary plate 17 and the output rotary plate 19 are made of metal disks having the same diameter.

  The input member 12 and the output member 13 are held on a coaxial core by fitting the ends of the rotation support shafts 18b and 20a facing each other so as to be relatively rotatable with each other.

  The input member 12 is provided so that the rotation support shaft 18a is connected to the output shaft 21 of the electric motor M so that the output shaft 21 and the input member 12 rotate integrally. The output member 13 includes the rotation support shaft 20b. The output member 13 and the worm gear 10 are provided so as to rotate integrally with the rotation shaft 22 of the worm gear 10.

  The input rotary plate 17 has an input side engagement portion 23 (23a, 23b) that engages the engagement pin 16 (16a) so as to be movable in the rotational radial direction inner side and the rotational radial direction outer side. The output member 13 is provided with an output side engaging portion 24 that engages the engaging pin 16 (16b) so as to be movable between the inner side in the rotational radial direction and the outer side in the rotational radial direction. Yes.

The output side engaging portion 24 is provided so as to be non-parallel to the input side engaging portion 23 when viewed in the direction along the rotation axis direction in the non-rotating state.
The input member 12 and the output member 13 are supported so as to be rotatable in a forward rotation direction indicated by an arrow N and a reverse rotation direction indicated by an arrow R in the drawing.

  The input side engaging part 23 forms a slit hole along the straight line at a position away from the rotation axis X in the input rotary plate 17 and reversely rotates with the forward rotation input side engaging part 23a across the center position C. The input side engaging portion 23b is provided in a symmetrical series.

  Accordingly, the rotation radial direction inner side ends of the forward rotation input side engagement portion 23a and the reverse rotation input side engagement portion 23b are the center position C, and the rotation radial direction outer side of the forward rotation input side engagement portion 23a. The end portion is the left end portion D1 in FIG. 4, and the rotational radial direction outer side end portion of the reverse rotation input side engaging portion 23b is the right end portion D2 in FIG.

  The output side engaging portion 24 is formed by forming a slit hole along the straight line passing through the rotation axis X in the output rotation plate 19, and the inner end of the rotation radial direction is closest to the rotation axis X. The end portion E is the end portion F that is farthest from the rotation axis X.

  Accordingly, the radially outer ends D1 and D2 of the input side engaging portion 23 are farther from the rotational axis X with respect to the position of the engaging pin 16 in the non-rotating state. The outer end F of the portion 24 in the radial direction in the radial direction is farther from the rotational axis than the position of the engaging pin 16 in the non-rotating state.

  The intermediate member 14 includes a boss 25 that is rotatably fitted to the rotation support shaft 18b of the input member 12 at a central position between the input rotary plate 17 and the output rotary plate 19, and a plate-like support arm 26. The support arm 26 is fixed to the boss 25 with the plate surface along the rotation direction.

  The swing arm 15 includes an input-side swing arm 15 a that swings between the support arm 26 and the input rotary plate 17, and an output-side swing arm 15 b that swings between the support arm 26 and the output rotary plate 19. And is supported by a swing shaft 27 fixed so as to penetrate through both surfaces of the support arm 26 so as to be swingable around the swing axis Y. .

  The engagement pin 16 includes an input side engagement pin 16a that enters and engages with the input side engagement portion 23a, and an output side engagement pin 16b that enters and engages with the output side engagement portion 23b. The engagement pin 16a is fixed to the input side swing arm 15a, and the output side engagement pin 16b is fixed to the output side swing arm 15b concentrically with the input side engagement pin 16a.

  In the non-rotating state of the input member 12 shown in FIG. 5, the input side engagement pin 16a is engaged with the rotation radial direction inner side end portion C of the forward rotation input side engagement portion 23a and the reverse rotation input side engagement portion 23b. The output side engaging pin 16b is engaged with the inner end E of the output side engaging portion 24 in the rotational radial direction.

  The rotation-diameter outer side end F of the output-side engagement portion 24 is in the forward rotation direction relative to the rotation-diameter direction outer side end D1 of the forward rotation input-side engagement portion 23a when the input member 12 is not rotated. N is provided on the lower side of N and on the lower side of the reverse rotation direction R with respect to the outer radial end D2 of the reverse rotation input side engaging portion 23b.

  As the input member 12 rotates forward or backward, the input engagement pin 16a moves outward in the rotational radial direction along the input engagement portion 23, and the output engagement pin 16b engages on the output side. An engagement pin movement restricting mechanism 28 that restricts the outward movement in the rotational radial direction along the portion 24 is provided.

The engagement pin movement restricting mechanism 28 includes a resistance member 29 that provides resistance to the swing of the swing arm 15.
The resistance member 29 includes a distal end portion 15c of the swing arm 15 on the side where the engagement pin 16 is not provided across the swing axis Y, and a driving force transmission device B in which the intermediate member 14 is housed. It is an elastic member such as rubber that is interposed between the inner surface of the housing 30 in a compressive deformation state and is fixed to the tip portion 15c.

  Reference numeral 31 denotes a tension coil spring, and when the input member 12 is not rotated, the input side engagement pin 16a is a rotation radial direction inner side end portion of the forward rotation input side engagement portion 23a and the reverse rotation input side engagement portion 23b. The swing arm 15 is moved so that the swing arm 15 is moved to a position where it is engaged with C and the output side engagement pin 16b is engaged with the inner end E of the output side engagement portion 24 in the rotational radial direction. The moving arm 15 is forcibly swung.

Next, the driving force transmission operation of the driving force transmission device B when the input motor 12 is driven to rotate in the normal rotation direction N by the electric motor M will be described.
The driving force transmission operation when the input member 12 is driven and rotated in the reverse rotation direction R transmits the driving force in a direction opposite to the movement when the input member 12 is rotated in the normal rotation direction N. To do.

  As described above, in the non-rotating state of the input member 12, as shown in FIG. 5, the input side engagement pin 16a is rotated in the rotational radial direction of the forward rotation input side engagement portion 23a and the reverse rotation input side engagement portion 23b. The output side engaging pin 16 b is engaged with the inner side end portion C, and the output side engaging portion 24 is engaged with the inner side end portion E in the rotational radial direction.

  As the drive rotation of the input member 12 in the normal rotation direction N is started, the input side engagement pin 16a is directed to the outer end D1 in the radial direction along the input side engagement portion 23a for normal rotation. At the same time, the output side engaging pin 16b starts moving toward the outer end F of the output side engaging portion 24 in the rotational radial direction.

  At this time, the input side engaging pin 16a and the output side engaging pin 16b are moved by an elastic member (resistive member) 29 interposed between the distal end portion 15c of the swing arm 15 and the inner surface of the housing 30 in a compressive deformation state. Since resistance is given to the free movement, the rotational force of the input member 12 is transmitted to the output member 13 via the input side engagement pin 16a and the output side engagement pin 16b.

  Accordingly, as shown in FIGS. 6 and 7, the engaging pin 16 (16a, 16a, 16b) is forcedly moved following the movement of the engaging pin 16 (16a, 16b), that is, while rotating, the output member 13 is rotated. 16b) can be moved along the input side engaging portion 23 and the output side engaging portion 24, and the output member 13 can be rotated at a reduced speed as the input member 12 starts rotating.

  6 shows a state in which the input member 12 has been rotated about 45 degrees from the start of rotation, and FIG. 7 shows a state in which the input member 12 has been rotated about 90 degrees from the start of rotation.

  Then, as shown in FIG. 8, the input side engagement pin 16a moves to the rotational radial direction outer side end D1 of the forward rotation input side engagement portion 23a, and the output side engagement pin 16b moves to the output side engagement portion. If it moves to the rotation radial direction outer side edge part 24 of 24, the further movement of the engaging pin 16 (16a, 16b) will be blocked | prevented, and the input member 12 and the output member 13 will rotate integrally.

  Therefore, as shown in FIG. 9, the reduction ratio between the input member 12 and the output member 13 is very large immediately after the input member 12 starts rotating, and thereafter, until the input member 12 and the output member 13 rotate together. Gradually becomes smaller.

[Second Embodiment]
10 and 11 show another embodiment of the driving force transmission device B according to the present invention, in which the input side engaging portion 23 is disposed at a position away from the rotation axis X and radially inward of the rotation axis X. Are formed in a circular arc shape, and a normal rotation input side engagement portion 23a and a reverse rotation input side engagement portion 23b are provided in a series of left-right symmetry with the central position C interposed therebetween.

  According to this embodiment, the input side engaging portion 23 is formed in a curved line shape that curves toward the rear side in the rotational direction toward the outer side in the rotational radial direction, and the output side engaging portion 24 is formed in a linear shape along the rotational radial direction. As shown in FIG. 11, the rotation amount of the input member 12 from when the input member 12 starts to rotate until the input member 12 and the output member 13 rotate integrally is increased. It is easy to gradually reduce the reduction ratio.

It should be noted that the output side engaging portion 24 is formed in a curved line that curves toward the rear side in the rotational direction toward the outer side in the rotational radial direction, and the input side engaging portion 23 is formed in a linear shape along the rotational radial direction. Good.
Other configurations are the same as those of the first embodiment.

[Third Embodiment]
12 to 15 show another embodiment of the driving force transmission device B according to the present invention. As shown in FIGS. 12 and 13, in the driving force transmission device B according to the first embodiment, the output side engagement pin 16b. Is changed to either the position close to the swing axis Y or the position of the input side engaging pin 16a and the concentric shape shown in the first embodiment, and the input side engaging pin 16a and the output are changed. The relative position with respect to the side engaging pin 16b can be changed.

In the present embodiment, for example, the output side engaging pin 16b is fixed at a position close to the swing axis Y, and the relative position between the input side engaging pin 16a and the output side engaging pin 16b is changed. The rotation amount of the output member 13 from the start of the rotation of the non-rotating input member 12 shown in FIG. 14 until the input member 12 and the output member 13 shown in FIG. Compared to the case shown in the embodiment, it can be reduced (the reduction ratio is increased).
Other configurations are the same as those of the first embodiment.

[Fourth Embodiment]
16 and 17 show another embodiment of the driving force transmission device B according to the present invention, in a state of compression deformation between the arm tip 15c as the resistance member and the inner surface of the housing 30 shown in the first embodiment. Instead of the interposed elastic member 29, a tension coil spring 31 is provided as a resistance member 29 that extends over the swing arm 15 and the intermediate member 14.

  When the input member 12 is in a non-rotating state, the tension coil spring 31 has the input side engaging pin 16a at the rotation radial direction inner side end C of the forward rotation input side engagement portion 23a and the reverse rotation input side engagement portion 23b. The swing arm 15 is moved so that the swing arm 15 is engaged and moved to a position where the output side engagement pin 16b is engaged with the rotational radial inner end E of the output side engagement portion 24. It also has a function of forcibly swinging.

That is, the tension coil spring 31 as the resistance member 29 is sufficiently stronger than the tension coil spring 31 shown in the first embodiment so that the engagement pin 16 does not easily move as the input member 12 starts to rotate. It consists of
Other configurations are the same as those of the first embodiment.

[Other Embodiments]
1. In the driving force transmission device according to the present invention, one engagement pin fixed to the swing arm in a cantilever manner may be engaged with both the input side engagement portion and the output side engagement portion. .
2. In the driving force transmission device according to the present invention, the input side engaging portion or the output side engaging portion may be formed in a groove shape.

Side view of a seat slide device equipped with a driving force transmission device Plan view of a seat slide device equipped with a driving force transmission device Cross-sectional view of the main part of a seat slide device equipped with a driving force transmission device Exploded perspective view of the main part Front view of main parts Front view of main parts Front view of main parts Front view of main parts Graph showing the relationship between the time from the start of rotation and the reduction ratio Front view of the main part showing the second embodiment Front view of the main part showing the second embodiment Sectional drawing of the principal part of the seat slide apparatus which shows 3rd Embodiment The disassembled perspective view of the principal part which shows 3rd Embodiment Front view of essential parts showing a third embodiment Front view of essential parts showing a third embodiment Front view of essential parts showing a fourth embodiment Front view of essential parts showing a fourth embodiment

12 Input member 13 Output member 14 Intermediate member 15 Swing arm 16 Engagement pin 16a Input side engagement pin 16b Output side engagement pin 23 Input side engagement part 24 Output side engagement part
2 9 engaging pin moving resistance member (elastic member, tension spring)
30 Housing C Rotational Radius Inner Side Position D1, D2 Rotational Radius Outer End E of Input Side Engagement Portion E Rotation Radial Inner Position F of Output Side Engagement Portion Rotating radial direction outer end X of output side engaging part X Rotating shaft core Y Swing shaft core

Claims (6)

An input member that is rotatably supported by the drive;
An output member rotatably supported on a rotation axis and a coaxial core of the input member;
An intermediate member supported on the rotational axis and the coaxial core of the input member so as to be relatively rotatable with respect to both the input member and the output member;
A swing arm supported by the intermediate member so as to be swingable around a swing axis parallel to the rotation axis;
An engagement pin provided on the swing arm and engaged with each of the input member and the output member;
The input member is provided with an input-side engagement portion that engages the engagement pin so as to be movable between a radially inner side and a radially outer side.
The output member engages the engagement pin so as to be movable between the inner side in the rotational radial direction and the outer side in the rotational radial direction, and the input side engagement in the direction along the rotational axis direction. An output side engaging portion that is non-parallel to the joint portion is provided,
The rotational radial direction outer side end portion of the input side engaging portion is farther than the rotational axis with respect to the position of the engaging pin in a non-rotating state,
The rotation-diameter direction outer side end portion of the output-side engagement portion is farther than the rotation axis with respect to the position of the engagement pin in a non-rotation state.
A rotational radial direction outer side end portion of the output side engaging portion is provided so as to be positioned on a lower side in the rotational direction than a rotational radial direction outer side end portion of the input side engaging portion,
An engagement pin movement resistance member that provides resistance to movement of the engagement pin toward the radially outer side along the input-side engagement portion and the output-side engagement portion as the input member rotates. Provided driving force transmission device. The driving force transmission device according to claim 1, wherein the engagement pin movement resistance member is provided so as to give resistance to the swing of the swing arm. The engagement pin movement resistance member includes an end portion of the swing arm on a side where the engagement pin is not provided across the swing shaft core, and a housing in which the intermediate member is housed. The driving force transmission device according to claim 2, wherein the driving force transmission device is an elastic member interposed between the two members in a compressed deformation state. The driving force transmission device according to claim 2, wherein the engagement pin movement resistance member is a spring that spans between the swing arm and the intermediate member.   2. The input side engaging portion is formed in a curved line shape that curves toward the rear side in the rotational direction toward the outer side in the rotational radial direction, and the output side engaging portion is formed in a linear shape along the rotational radial direction. The driving force transmission apparatus of any one of -4.   The said engaging pin is provided with the input side engaging pin engaged with the said input side engaging part, and the output side engaging pin engaged with the said output side engaging part. The driving force transmission device according to item.

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