JP2013245805A - Stabilizer device and continuously variable transmission - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce an impact force acting between a guide rail and a stopper when the guide rail collides with the stopper, to improve durability of a stabilizer device, and to improve a string vibration reduction effect of the stabilizer.SOLUTION: A stabilizer device 6 includes a guide rail 7 that covers a winding transmission member 4 and a stopper 8 that swingably supports the guide rail 7. A torsion spring 9 is mounted on the stopper 8, the torsion spring biasing the guide rail 7 in a radial direction of the winding transmission member 4.

Description

  The present invention relates to a stabilizer device and a continuously variable transmission including the same.

  A continuously variable transmission for an automobile includes a primary pulley having a fixed sheave and a movable sheave, a secondary pulley having a fixed sheave and a movable sheave, and a winding transmission member wound around the primary pulley and the secondary pulley. There is something.

  In this type of continuously variable transmission, the portion (string portion) between the primary pulley and the secondary pulley of the winding transmission member is not restricted by the pulley, and thus easily vibrates (string vibration). There is a problem that noise characteristics deteriorate.

  Patent Document 1 proposes to use a stabilizer device in order to reduce string vibration. The stabilizer device includes a guide rail that covers a winding transmission member that transmits power in the continuously variable transmission, and a stopper that supports the guide rail so as to be swingable.

JP 2011-127620 A

  In the thing of the said patent document 1, when a guide rail vibrates in the direction orthogonal to the advancing direction of a winding transmission member with the vibration of a winding transmission member, a guide rail and a stopper collide, It is thought that durability will fall.

  An object of the present invention is to reduce the impact force acting between the guide rail and the stopper when they collide, improve the durability of the stabilizer device, and improve the string vibration reduction effect of the stabilizer device. is there.

  A stabilizer device according to the present invention includes a guide rail that covers a winding transmission member that transmits power in a continuously variable transmission, and a stopper that swingably supports the guide rail, wherein the stopper and the guide rail are provided. In between, the elastic body which urges | biases the said guide rail to the radial direction of the said winding transmission member is provided.

  According to the stabilizer device of the present invention, the radial impact force of the winding transmission member acting between the stopper and the guide rail is reduced by the elastic deformation of the elastic body, and the durability of the stabilizer device is improved. Furthermore, the stringer vibration reduction effect is improved by urging the stabilizer device in the radial direction by the elastic body.

FIG. 1 is a front view showing a first embodiment of a stabilizer device and a continuously variable transmission according to the present invention. 2 is an enlarged front view of the main part of FIG. 1. FIG. 2 (a) shows a state when the transmission gear ratio of the continuously variable transmission is maximum, and FIG. 2 (b) shows a minimum transmission gear ratio of the continuously variable transmission. Each state is shown. FIG. 3 is an enlarged front view of a main part of a second embodiment of the stabilizer device according to the present invention.

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

  1 and 2 show a first embodiment of a stabilizer device and a continuously variable transmission according to the present invention.

  As shown in FIG. 1, the continuously variable transmission (1) has a primary transmission (2), a secondary pulley (3), a primary pulley (2) and a secondary pulley (3) that are wound around a transmission. A member (4) and a stabilizer device (6) are provided.

  The primary pulley (2), the secondary pulley (3), the winding transmission member (4), and the stabilizer device (6) are accommodated in the casing (5).

  The stabilizer device (6) moves the string part (the part not regulated by the pulleys (2) and (3)) of the winding transmission member (4) between the primary pulley (2) and the secondary pulley (3). Regulate (vibration). The stabilizer device (6) has an upper side in FIG. 1 (portion from the secondary pulley (3) to the primary pulley (2)) and a lower side in FIG. 1 (portion from the primary pulley (2) to the secondary pulley (3)). And are provided respectively.

  The continuously variable transmission (1) has an underdrive with a minimum speed ratio (rotational speed of the secondary pulley (3) / rotational speed of the primary pulley (2)) for low speed driving and a gear ratio for high speed driving. The gear ratio changes with the maximum overdrive. In the underdrive state (indicated by a two-dot chain line in FIG. 1), the winding diameter on the primary pulley (2) side is minimum and the winding diameter on the secondary pulley (3) side is maximum. In the overdrive state (shown by solid and broken lines in FIG. 1), the winding diameter on the primary pulley (2) side is the maximum and the winding diameter on the secondary pulley (3) side is the minimum.

  The winding transmission member (4) may be a belt or a chain. In the case of a chain, for example, a plurality of links, a plurality of first pins that connect the plurality of links so as to be bent, and And a second pin.

  Of the directions orthogonal to the traveling direction of the winding transmission member (4), the axial direction of the primary pulley (2) and the secondary pulley (3) is referred to as the width direction of the winding transmission member (4). The direction perpendicular to the width direction of the member (4) is referred to as the radial direction of the transmission member (4).

  Each stabilizer device (6) includes a guide rail (7) through which the string portion of the winding transmission member (4) is inserted so as to be relatively movable, and a stopper (8) that supports the guide rail (7) so as to be swingable. It has. A torsion spring (9) is attached to the stopper (8).

  The stopper (8) has a cylindrical shape and extends in the width direction of the winding transmission member (4). The stopper (8) is disposed in the vicinity of the intersection of the winding transmission member (4) when the speed ratio is maximum and the winding transmission member (4) when the speed ratio is minimum.

  The guide rail (7) is made of synthetic resin and has a cylindrical main body (21). The cross section of the main body (21) is formed in a rectangular shape with a size that allows the winding transmission member (4) to be inserted with some play. Thereby, the string portion of the winding transmission member (4) is inserted into the guide rail (7) so as to be relatively movable, and the traveling direction of the winding transmission member (4) of the string portion of the winding transmission member (4) The movement in the direction orthogonal to is regulated by the guide rail (7).

  The guide rail (7) is divided into two at the center in the width direction of the winding transmission member (4), and the winding transmission member is wound between the pulleys (2) and (3). The string part of (4) is wound around and attached so as to be sandwiched from both sides in the width direction of the transmission member (4). In order to integrate the shapes divided into two, fitting or welding may be used.

  A substantially U-shape for supporting the stopper (8) on the outer side of the main body (21) of the guide rail (7) and in the central portion of the main body (21) in the traveling direction of the winding transmission member (4). A support portion (22) is provided integrally.

  As shown in FIG. 2 in an enlarged manner, the support portion (22) of the guide rail (7) includes a pair of side walls (22a) and (22b) facing the traveling direction of the winding transmission member (4) and a pair of And bottom walls (22c) for connecting the bases of the side walls (22a) and (22b) to each other. The torsion spring (9) is wound around the stopper (8) clockwise a plurality of times, with the inner diameter side end (9a) fixed to the outer side surface of the stopper (8). The outer diameter side end (9b) of the torsion spring (9) is a free end. When the diameter of the torsion spring (9) is reduced, the torsion spring (9) abuts against the bottom wall (22c) of the support portion (22) and urges the guide rail (7) around the radial direction of the transmission member (4). doing.

  The torsion spring (9) does not exert an urging force in the traveling direction of the winding transmission member (4). When the guide rail (7) is moved relative to the stopper (8) in the direction of travel of the winding transmission member (4), the side walls (22a) and (22b) of the support portion (22) are moved to the stopper (8 ).

  The guide rail (7) swings while being supported by the stopper (8) as the speed ratio changes. As a result, the movement of the winding transmission member (4) in the direction perpendicular to the traveling direction of the winding transmission member (4) (the radial direction and the width direction of the winding transmission member (4)) of the string portion is guided rail (7 ) And the string vibration of the winding transmission member (4) is reduced.

  In particular, in this embodiment, the guide rail (7) is urged in the radial direction by the torsion spring (9) attached to the stopper (8), so that the guide rail (7) itself is wound around the transmission member (4). It can suppress moving relatively along the radial direction. Therefore, since the winding transmission member (4) is driven while being more reliably regulated by the stabilizer device (6), the vibration reduction effect of the winding transmission member (4) by the stabilizer device (6) is further improved.

  Here, when a force is applied to the guide rail (7) along with the string vibration of the winding transmission member (4), the guide rail (7) and the stopper (8) apply a force via the torsion spring (9). Play with each other. At this time, the radial force of the winding transmission member (4) acting between the two is absorbed by elastic deformation of the torsion spring (9). Therefore, the impact force acting between the stopper (8) and the guide rail (7) is reduced as compared with the case where the torsion spring (9) is not provided, and the guide rail (7) and / or the stopper (8 ) Is prevented from being damaged.

  In the first embodiment, the shape of the torsion spring is not limited to that illustrated. In the first embodiment, the impact force acting between the stopper (8) and the guide rail (7) is reduced by elastic deformation of the torsion spring (9) (an example of an elastic body). The same effect can be obtained by using a leaf spring (10) (another example of an elastic body) instead of the torsion spring (9).

  FIG. 3 shows an example (second embodiment). In the figure, the leaf spring (10) abuts the bottom (10a) and the side walls (22a) (22b) of the support (22) facing each other with a gap to the bottom wall (22c) of the support (22). It has a pair of sides (10b) (10c). The leaf spring (10) is guided by the bent portions (10d) (10e) provided on the side portions (10b) (10c) being fitted to the side walls (22a) (22b) of the support portion (22). It is fixed to the rail (7). The bottom (10a) of the leaf spring (10) is pressed by the stopper (9), so that the guide rail (7) is moved radially inward of the winding transmission member (4) by the leaf spring (10). Always energized towards.

  In the second embodiment, when a force is applied to the guide rail (7) along with the string vibration of the winding transmission member (4), the guide rail (7) and the stopper (8) are interposed via the leaf spring (10). Exert power. At this time, the radial force of the winding transmission member (4) acting between the two is absorbed by elastic deformation of the leaf spring (10). Therefore, the impact force acting between the stopper (8) and the guide rail (7) is reduced compared to the case where the leaf spring (10) is not provided, and the guide rail (7) and / or the stopper (8 ) Is prevented from being damaged.

  In the second embodiment, a gap may be provided between the side portions (10b) and (10c) of the leaf spring (10) and the side walls (22a) and (22b) of the support portion (22). Further, the bottom part (10a) of the leaf spring (10) may be flat with no force acting on the leaf spring (10), and is directed radially inward of the winding transmission member (4). It may be a convex convex shape. In addition, the illustrated leaf spring (10) is substantially U-shaped, but may instead be substantially V-shaped.

  The stabilizer device (6) may be provided on only one of the upper and lower sides in FIG. Further, there may be a gap between the torsion spring (9) and the side wall (22a) (22b) of the support portion (22) of the guide rail (7) (the guide rail (7) is wound around the transmission member). The gap may be zero (the guide rail (7) cannot be moved in the traveling direction of the winding transmission member). Further, there may be a gap between the side portions (10b) (10c) of the leaf spring (10) and the stopper (8) (the guide rail (7) is wound around and can be moved in the traveling direction of the transmission member), The clearance may be zero (the guide rail (7) cannot be moved in the traveling direction of the winding transmission member). The stopper (8) may be disposed on the radially outer side of the winding transmission member (4).

(1): continuously variable transmission, (2): primary pulley, (3): secondary pulley, (4): winding transmission member, (6): stabilizer device, (7): guide rail, (8): Stopper, (9): Torsion spring (elastic body), (10): Leaf spring (elastic body)

Claims (2)

In a stabilizer device comprising: a guide rail that covers a winding transmission member that transmits power in a continuously variable transmission; and a stopper that supports the guide rail in a swingable manner.
The stabilizer apparatus provided with the elastic body which urges | biases the said guide rail to the radial direction of the said winding transmission member between the said stopper and the said guide rail. In a continuously variable transmission comprising a primary pulley, a secondary pulley, a winding transmission member wound around the primary pulley and the secondary pulley, and a stabilizer device,
A continuously variable transmission in which the stabilizer device is the stabilizer device according to claim 1.

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