JP2009293789A - Stabilizer control device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a stabilizer control device can easily and surely join one of a pair of stabilizer bars to a bearing part, without requiring a separate component. <P>SOLUTION: A spline shaft part 11e and a screw hole 11f are formed over a predetermined range in the axial direction from an end surface to one end part of the pair of stabilizer bars 11 and 12, and a spline hole 22e is formed over the predetermined range in the axial direction to the bearing part 22a of a first member. A cutout S is also formed over the predetermined range in the axial direction to one of the bearing part and the spline shaft part. Thus, the spline shaft part is suitable for the spline hole, and a nut 71 is threadedly engaged with the bearing part. When threadedly engaging a bolt 70 with the end part, since the spline shaft part is pulled in the bearing part while expansively opening the cutout in the circumferential direction, both are firmly fixed. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a stabilizer control device for a vehicle, and more particularly to a stabilizer control device including a pair of stabilizer bars disposed between left and right wheels of a vehicle.

  In general, a stabilizer control device for a vehicle is configured to reduce or suppress a roll motion of a vehicle body by applying an appropriate roll moment from the outside by an action of a stabilizer bar while the vehicle is turning. In order to realize this function, an active stabilizer control device in which a gear device and a motor are interposed between a pair of stabilizer bars arranged between the left and right wheels of the vehicle, or a gear device and a clutch device are interposed. Passive stabilizer control devices are known. As this gear device, a multi-stage planetary gear mechanism or a mysterious planetary gear mechanism is used, and a gear mechanism called harmonic drive (registered trademark of Harmonic Drive Systems Co., Ltd.) disclosed in Non-Patent Document 1 is also used. .

  Patent Document 1 discloses a stabilizer control device that can easily and reliably spline-couple at least one of a pair of stabilizer bars to a bearing portion of a first gear. In this stabilizer control device, a spline shaft portion having an outer tooth portion over a predetermined range in the axial direction from the end surface is formed with respect to one end portion of the pair of stabilizer bars, and the axial direction from the end surface of the spline shaft portion. Forming a groove-shaped notch portion having a predetermined length in the first portion, and forming a spline hole having an inner tooth portion over a predetermined range in the axial direction with respect to the bearing portion of the first member as a component of the actuator, With the tooth-shaped elastic member having the outer tooth portion meshing with the inner tooth portion of the spline hole being mounted in the notch portion, the spline shaft portion is fitted into the spline hole and one of the pair of stabilizer bars is used as the first member. Configured to connect.

JP 2006-27525 A “Principle of Harmonic Drive” [online]. [Retrieved on 2004-2-13]. Retrieved from the Internet: <URL: http: //www.hds.co.jp/hd/index.html>

  According to the stabilizer control device described in Patent Document 1, the spline shaft portion is inserted into the spline hole with a light load without requiring a special press-fitting device, and after insertion, the spline shaft is driven by the elastic force of the tooth-shaped elastic member. The portion is in close contact with the spline hole and an appropriate coupling relationship is ensured, but a separate tooth-shaped elastic member is required, and its processing and assembly are required.

  Accordingly, the present invention provides a stabilizer control device including a pair of stabilizer bars disposed between left and right wheels of a vehicle, and easily and surely supports one of the pair of stabilizer bars without requiring a separate component. It is an object of the present invention to provide a stabilizer control device that can be coupled to the above.

  In order to solve the above-described problems, the present invention provides a stabilizer control device including a pair of stabilizer bars disposed between left and right wheels of a vehicle as described in claim 1, wherein one of the pair of stabilizer bars. A first member having a bearing portion connected to the second member and a second member connected to the other of the pair of stabilizer bars and causing a rotational speed difference relative to the first member; A screw hole is formed in an axial direction from one end surface of one of the pair of stabilizer bars, and a spline shaft portion having an outer tooth portion extending from the end surface over a predetermined range in the axial direction is formed. A spline hole having an inner tooth portion is formed over a predetermined axial range with respect to the bearing portion of the member, an outer screw portion is formed on the outer periphery of the bearing portion, and one of the bearing portion and the spline shaft portion is formed. And a nut having an inner screw portion that is screwed into the outer screw portion of the bearing portion, and a bolt that is screwed into the screw hole of the one end portion. The spline shaft portion is fitted into the spline hole, the nut is screwed into the bearing portion, and the bolt is screwed into the one end portion to connect the bearing portion and the spline shaft portion. It is configured to be fixed.

  According to a second aspect of the present invention, there is provided the stabilizer control device including a pair of stabilizer bars disposed between the left and right wheels of the vehicle and a gear device that couples the pair of stabilizer bars. The gear device includes a first gear having a bearing connected to one of the pair of stabilizer bars, and a rotation speed difference relative to the first gear connected to the other of the pair of stabilizer bars. A second gear for generating a screw, and a screw hole is formed in an axial direction from one end surface to one end portion of the pair of stabilizer bars, and an outer tooth portion is provided over a predetermined range in the axial direction from the end surface. A spline shaft portion is formed, a spline hole having an inner tooth portion over a predetermined range in the axial direction is formed with respect to the bearing portion of the first gear, and an outer screw portion is formed on the outer periphery of the bearing portion. And a nut having an inner screw portion that is formed by forming a notch over a predetermined range in the axial direction with respect to one of the bearing portion and the spline shaft portion, and that has an inner screw portion that engages with an outer screw portion of the bearing portion, A bolt that is screwed into a screw hole at the end of the shaft, the spline shaft portion is fitted into the spline hole, the nut is screwed into the bearing portion, and the bolt is screwed into the one end portion. And you may comprise so that the said bearing part and the said spline shaft part may be fixed.

  As described in claim 3, the cutouts may be formed at a plurality of locations at equal intervals in the circumferential direction over a predetermined range in the axial direction with respect to one of the bearing portion and the spline shaft portion.

  Thus, according to the stabilizer control device of the first aspect, as described above, the spline shaft portion is fitted into the spline hole, the nut is screwed into the bearing portion of the first member, and the bolt is fixed to the stabilizer. It is configured to be screwed into one end of the bar to fix the bearing part and the spline shaft part. By tightening the bolt, the notch of the spline shaft part expands in the circumferential direction while the spline shaft Since the portion is pulled into the bearing portion, both are firmly fastened without any play between the bearing portion and the spline shaft portion. In this way, one of the pair of stabilizer bars can be easily and reliably coupled to the bearing portion of the first member without requiring any separate components, and an appropriate coupling relationship can be maintained. Then, when rotational torque is applied to the stabilizer bar, each tooth surface on the rotation side in one direction of the spline shaft portion comes into contact with each tooth surface of the spline hole of the first member facing this, and reliably The connected state is maintained.

  According to the stabilizer control device of the second aspect, as described above, the spline shaft portion is fitted into the spline hole, the nut is screwed into the bearing portion of the first gear, and the bolt is attached to the stabilizer bar. It is configured to be screwed into one end to fix the bearing and the spline shaft, and by tightening the bolt, the notch of the spline shaft expands in the circumferential direction and the spline shaft Since it is pulled into the bearing portion, both are firmly fastened without any play between the bearing portion and the spline shaft portion, and one of the pair of stabilizer bars can be easily and reliably connected without the need for separate components. It can couple | bond with the bearing part of 1 gearwheel, and can maintain a suitable coupling relationship.

  For example, as described in claim 3, if notches are formed at a plurality of locations at equal intervals in the circumferential direction, the bearing portion and the spline shaft portion can be easily and reliably connected to maintain an appropriate connection relationship. Can do.

  Hereinafter, preferred embodiments of the present invention will be described. FIG. 1 shows a cross section of an actuator portion in a stabilizer control device according to an embodiment of the present invention. The stabilizer bar is divided into left and right stabilizer bars 11 and 12, and one end of each of the left and right wheels ( (Not shown) and the other end of each is connected in the actuator AC. These stabilizer bars 11 and 12 are held on a vehicle body (not shown) by holding means (not shown). Thus, the torsional force of the stabilizer bars 11 and 12 is variably controlled by the actuator AC, and the vehicle body roll angle that is the roll motion of the vehicle body can be suppressed.

  The actuator AC of this embodiment includes a motor 40 and a speed reduction mechanism 20, and a brushless DC motor (brushless motor) is used as the motor 40. The speed reduction mechanism 20 is a harmonic drive described in Non-Patent Document 1 described above. Harmonic Drive Systems (registered trademark) type wave gear mechanism is used to constitute the gear device of the present invention. In this embodiment, a three-phase brushless motor is used as the motor 40. However, the present invention is not limited to this, and a motor having another number of phases may be used, or a motor with a brush may be used. Good. As the speed reduction mechanism 20, a mysterious planetary gear mechanism (not shown) may be used. Hereinafter, each of the above components will be described in sequence.

  In FIG. 1, the front end portion 12a of the stabilizer bar 12 is disposed close to the front end portion 11a of the stabilizer bar 11, and the housing 52 is interposed via the ring member 52a so that the front end portion 11a of the stabilizer bar 11 is accommodated. It is being fixed to the front-end | tip part 12a. In the present embodiment, the housing 52 is formed in a container shape, and includes a cylindrical housing 51 integrally joined to the opening end portion by spline coupling, and a lid member 53 fixed to the opening end portion. The entire housing 50 is constructed. The housing 52 and the stabilizer bar 11 are respectively fixed with output portions of the speed reduction mechanism 20 that is a gear device, and are configured to decelerate and output the rotation of the motor 40. The input portion of the speed reduction mechanism 20 is fixed to the hollow member 30.

  The hollow member 30 has a multi-pole magnet (not shown) attached to the outer peripheral surface of a cylindrical member, and constitutes a rotor (rotor) of the motor 40. As shown in FIG. (63a, 63b) is rotatably supported on the inner surface of the housing 51 and its lid member 53, and the stabilizer bar 11 is inserted into these hollow portions. On the other hand, a stator (stator) 41 of the motor 40 is disposed so as to surround the hollow member 30 and is fixed to the inner surface of the housing 51.

  The stabilizer bar 11 is rotatably supported on the inner surface of the lid member 53 via a bearing 63c outside the motor 40. Further, a rotation sensor 80 for detecting the shaft rotation of the stabilizer bar 11 is disposed in the housing 51. The rotation sensor 80 of the present embodiment is supported in the housing 51 so as to be opposed to a magnet 81 that is magnetized so as to be in phase with the magnet of the hollow member 30 and is annularly arranged on the outer peripheral surface of the hollow member 30. However, for example, another rotation sensor such as an optical rotary encoder may be used.

  As shown in FIG. 1, the stabilizer bar 11 has an intermediate portion 11b, an intermediate portion 11c having a larger diameter than the distal end portion 11a, and a main body portion 11d having a larger diameter. On the other hand, the stabilizer bar 12 has a large-diameter tip portion 12a and a main body portion 12d having a smaller diameter and the same diameter as the main body portion 11d. The stabilizer bars 11 and 12 are coaxially arranged, and are arranged close to each other so that the tip end portions 11a and the tip end portions 12a face each other in the axial direction. A ring member 52 a is fixed to the housing 52, and the ring member 52 a is splined to the distal end portion 12 a of the stabilizer bar 12. Therefore, the housing 52 is configured to rotate integrally with the stabilizer bar 12.

  In this embodiment, a spline shaft portion 11e having an outer tooth portion is formed on the tip end portion 11a of the stabilizer bar 11 over a predetermined range in the axial direction from the end surface. Further, a screw hole 11f is formed in the spline shaft portion 11e in the axial direction from the end surface thereof. On the other hand, the spline hole 22e which has an inner tooth part over the predetermined range of an axial direction is formed with respect to the bearing part 22a of the flexible gear 22 which is a 1st member and is a 1st gearwheel. In the present embodiment, a slit-shaped notch S is formed over a predetermined range in the axial direction with respect to the spline shaft portion 11e, and as shown in FIG. For example, it is formed in three places at equal intervals in the circumferential direction. The notches S are not limited to three places, and may be formed at any number of places.

  Thus, the spline shaft portion 11e is fitted into the spline hole 22e, and the container-like nut 71 is screwed into the outer tooth portion 22f of the bearing portion 22a. Then, the bolt 70 is screwed into the screw hole 11f of the spline shaft portion 11e through the washer 72. At this time, by tightening the bolt 70, the spline shaft portion 11e is drawn into the bearing portion 22a while the notch S expands in the circumferential direction, so that play occurs between the bearing portion 22a and the spline shaft portion 11e. Both are firmly fastened, and the load on the spline shaft portion 11e is alleviated. The bolt 70 is disposed so that its head is accommodated in a recess 12b formed in the tip 12a of the stabilizer bar 12, as shown in FIG.

  As described above, the spline shaft portion 11e and the bearing portion 22a are firmly fastened. When rotational torque is applied to the stabilizer bar 11, the tooth surfaces on the rotation side in one direction of the spline shaft portion 11e face each other. The spline holes 22e contact each tooth surface and the connection state by spline coupling is reliably maintained. Then, when rotational torque is applied to the stabilizer bar 11, the tooth surfaces on the rotation side in one direction of the spline shaft portion 11e come into contact with the tooth surfaces of the spline holes 22e opposed thereto, and are securely connected. Is maintained.

  FIG. 3 relates to another embodiment of the present invention, and shows another aspect of the cross section taken along the line AA of FIG. In the present embodiment, notches S are formed at three locations at equal intervals in the circumferential direction over a predetermined range in the axial direction of the bearing portion 22a instead of the spline shaft portion 11e. Since other configurations are the same as those of the above-described embodiment, description thereof will be omitted. Thus, when the bolt 70 is screwed into the screw hole 11f of the spline shaft portion 11e and tightened, the notch S of the bearing portion 22a expands in the circumferential direction, and the spline shaft portion 11e is pulled into the bearing portion 22a. Therefore, both are firmly fastened without any play between the bearing portion 22a and the spline shaft portion 11e.

  In each of the above embodiments, as shown in FIG. 1, the speed reduction mechanism 20 constituting the gear device has a flexible gear 22 splined to the tip end portion 11 a of the stabilizer bar 11, and the inner peripheral surface of the opening end portion of the housing 52. Ring gears 23 are fitted to each other and are integrally joined. Although the flexible gear 22 is described as “flex spline” in Non-Patent Document 1, it is understood as a shortened expression of a flexible (flexible) spline member. The ring gear 23 is described as “circular spline” in Non-Patent Document 1. As a means for integrally joining, there is spline coupling, but other joining means may be used, and for example, the ring gear 23 may be directly formed on the inner peripheral surface of the opening end of the housing 52.

  As described above, the shaft portion 22 a of the flexible gear 22 fixed to the stabilizer bar 11 is supported so as to be rotatable relative to the housing 52 via the bearing 62. The bearing 62 is held on the stabilizer bar 11 by a nut 71. On the other hand, an elliptical gear 21 is spline-coupled to the hollow member 30 and integrally joined thereto, and is configured to interlock with the flexible gear 22. The elliptical gear 21 is described as “wave generator” in Non-Patent Document 1.

  Here, the elliptical gear 21, the flexible gear 22, and the ring gear 23 are described as follows in Non-Patent Document 1 described above. First, the wave generator corresponding to the elliptical gear 21 is a part in which a thin ball bearing is mounted on the outer periphery of the elliptical cam, and the outer ring is elastically deformed via the ball. The flex spline corresponding to the flexible gear 22 is a thin cup-shaped metal elastic part, and teeth are carved on the outer periphery of the opening. The circular spline corresponding to the ring gear 23 is a rigid ring-shaped part, and teeth are engraved on the inner periphery, and the number of teeth is two more than the flexspline (22). Accordingly, for example, when the wave generator (21) is set as the input side and is driven to rotate, the flexspline (22) having a different number of teeth as described above rotates while meshing with the circular spline (23), and is decelerated. The Rukoto.

  The actuator AC of the above embodiment is a so-called active actuator, but instead of this, a passive actuator provided with a clutch device (not shown) and a gear device may be used. The gear device to be used has the same configuration as the speed reduction mechanism 20 and functions as a speed increasing mechanism or a rotational torque reducing mechanism.

It is sectional drawing of the actuator part in the stabilizer control apparatus which concerns on one Embodiment of this invention. It is sectional drawing which shows the AA line cross section of FIG. It is sectional drawing which shows the AA line cross section of FIG. 1 in other embodiment of this invention.

Explanation of symbols

50, 51, 52 Housing 11, 12 Stabilizer bar 11e Spline shaft portion 20 Reduction mechanism 22 Flexible gear 22a Bearing portion 22e Spline hole 30 Hollow member 40 Motor 70 Bolt 71 Nut AC Actuator S Notch

Claims (3)

  In a stabilizer control device provided with a pair of stabilizer bars disposed between left and right wheels of a vehicle, a first member having a bearing portion connected to one of the pair of stabilizer bars, and the other of the pair of stabilizer bars And a second member that creates a rotational speed difference relative to the first member, and a screw hole is formed in an axial direction from one end surface to one end of the pair of stabilizer bars And forming a spline shaft portion having an outer tooth portion over a predetermined range in the axial direction from the end face, and a spline hole having an inner tooth portion over a predetermined range in the axial direction with respect to the bearing portion of the first member. And an outer screw portion is formed on the outer periphery of the bearing portion, and a notch is formed over a predetermined range in the axial direction with respect to one of the bearing portion and the spline shaft portion. A nut having an inner screw portion to be screwed into the outer screw portion, and a bolt to be screwed into the screw hole of the one end portion, and the spline shaft portion is fitted into the spline hole, and the nut is A stabilizer control device, wherein the stabilizer control device is configured to be screwed into a bearing portion and to be screwed into the one end portion to fix the bearing portion and the spline shaft portion.   In a stabilizer control device including a pair of stabilizer bars disposed between left and right wheels of a vehicle and a gear device that couples the pair of stabilizer bars, the gear device is a bearing connected to one of the pair of stabilizer bars. A pair of stabilizers, and a second gear connected to the other of the pair of stabilizer bars and generating a rotational speed difference relative to the first gear. A screw hole is formed in the axial direction from one end of the bar to the one end of the bar, and a spline shaft having an outer tooth portion extending from the end to a predetermined range in the axial direction is formed. A spline hole having an inner tooth portion over a predetermined range in the axial direction is formed, an outer screw portion is formed on the outer periphery of the bearing portion, and the bearing portion and the spline shaft portion are And a nut having an inner screw portion screwed into the outer screw portion of the bearing portion, and a bolt screwed into the screw hole of the one end portion. The spline shaft portion is fitted into the spline hole, the nut is screwed into the bearing portion, and the bolt is screwed into the one end portion, and the bearing portion, the spline shaft portion, A stabilizer control device characterized by being configured to fix.   The said notch is formed in several places at equal intervals in the circumferential direction over the predetermined range of an axial direction with respect to one of the said bearing part and the said spline shaft part. Stabilizer control device.

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