JP2010083410A - Stabilizer control device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce a stabilizer control device in size and weight as a whole by securing necessary reduction gear ratio by a small gear device. <P>SOLUTION: The stabilizer control device is equipped with a flat and thin wave gear device 20 and a planetary gear device 30. Regarding the latter, a sun gear 31 is rotatably supported to one stabilizer bar 11 together with a second ring gear 22, a third ring gear 33 is fixed to a housing fixed to the other stabilizer bar 12, and a planetary gear 32 is arranged to be engaged with the third ring gear and the sun gear, and to rotate around the sun gear. A carrier 34 which rotatably supports the planetary gear is fixed to the stabilizer bar 11 and rotatably supported to the housing. <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.

  Patent Document 1 states that “the actuator for controlling the torsional force of the stabilizer is miniaturized, and the torsional force only by the pair of stabilizer bars when the actuator is not operated is made as large as possible. The object is to provide a stabilizer control device that can be made into a motor, ”“ a pair of stabilizer bars disposed between the left and right wheels of the vehicle, a motor and a speed reduction mechanism, and the pair of the stabilizer bars via the speed reduction mechanism. The stabilizer bar is connected, and the stabilizer control device includes an actuator that applies a torsional force to the pair of stabilizer bars by driving the motor, wherein the reduction mechanism includes the first gear and the first gear. A second gear that causes a rotational speed difference relative to the gear, and the first gear and the gear The two gears are coaxially arranged close to each other, and the pair of stabilizer bars are arranged close to each other in the speed reduction mechanism, with their end faces facing each other being connected to the first gear and the second gear, respectively. A "stabilized" controller is disclosed.

  As the gear device, a multistage planetary gear mechanism or a strange planetary gear mechanism is used. As a reduction mechanism capable of obtaining a large reduction ratio, a harmonic drive disclosed in Non-Patent Document 1 (Harmonic Drive Co., Ltd.). A gear device known as a wave gear device is effective, and an embodiment is also disclosed in Patent Document 1. Furthermore, Non-Patent Document 1 relates to a flat and thin speed reduction mechanism. “The FR series component type is a flat and thin type for high torque. There are four components as in the FB series, but the same as the cup type. The structure is basically the same as the FB series, but the wave generator bearings are arranged in two rows, the circular spline and flexspline have wider tooth widths, and support high torque capacity. ”And an exploded structure diagram is disclosed.

JP 2004-314947 A "FR Series Component Type: Harmonic Drive R: Product Information: Harmonic Drive Systems" [online]. [Retrieved on 2008-8-20]. Retrieved from the Internet: <URL: http://www.hds.co .jp / products / hd / fr_c / index.html>

  In the stabilizer control device described in Patent Document 1, the cup-type wave gear device described in Non-Patent Document 1 is used as a gear device that can obtain a large reduction ratio of, for example, 1/200. In order to secure the strength required for the speed reduction mechanism of the stabilizer control device, a cup-shaped wave gear device is required as described in Patent Document 1, but it is very expensive, has a large radial dimension, A large space is required for mounting. In addition, when a mysterious planetary gear mechanism is used, a two-stage reduction is required to obtain a necessary reduction ratio, so that not only the number of parts increases and the cost increases, but also by a planetary gear that rotates at high speed, Since rolling noise is generated, it is necessary to take measures to mute the sound.

  Therefore, the present invention provides a stabilizer control device having a pair of stabilizer bars disposed between the left and right wheels of a vehicle, ensuring a necessary reduction ratio with a small gear device, and enabling a reduction in size and weight of the entire device. The problem is to do.

  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 hollow member rotatably supported around the housing, a housing fixed to the other of the pair of stabilizer bars and rotatably supporting the hollow member, and driving means fixed to the housing and rotationally driving the hollow member A wave gear device and a planetary gear device connected to the drive means and arranged in parallel in the housing, the wave gear device being fixed to the housing and having a screw groove formed on an inner peripheral surface. The ring gear, the second ring gear that is arranged in parallel with the first ring gear and has a screw groove formed on the inner peripheral surface, and the same number of teeth as the screw groove of the first ring gear, A flexible gear that is formed on the outer peripheral surface with a screw thread having two teeth less than the number of teeth of the screw groove of the second ring gear, and that is engaged with the screw groove of the first and second ring gears, and the hollow An elliptical gear fixed to the member in a state of preventing rotation and partially meshing the flexible gear with the first and second ring gears, and the planetary gear device includes the second ring gear. A sun gear of an external gear that is integrally coupled to the one of the pair of stabilizer bars and rotatably supported with the second ring gear, and a third ring gear of an internal gear fixed to the housing, A planetary gear of an external gear screwed into the third ring gear and the sun gear and rotating around the sun gear, and a carrier for rotatably supporting the planetary gear, the pair of stabilizer gears One is fixed to the bar, in which a structure formed by and a carrier rotatably supported relative to the housing.

  The sun gear has a skirt portion formed so as to surround an outer peripheral surface of the second ring gear, and the second ring gear is accommodated in the skirt portion. The sun gear may be integrally coupled to the second ring gear. The first ring gear may be configured to be fixed to the housing via a fixing ring fixed in the housing, as described in claim 3.

  Thus, the stabilizer control device according to claim 1 includes the wave gear device and the planetary gear device, and the planetary gear device is rotatably supported together with the second ring gear with respect to one of the pair of stabilizer bars. A sun gear, a third ring gear fixed to the housing, a planetary gear that is screwed into the third ring gear and the sun gear and rotates around the sun gear, and a carrier that rotatably supports the planetary gear, and a pair of stabilizer bars And a carrier that is rotatably supported with respect to the housing, so that the gear device can be made compact by a flat and thin wave gear device and a planetary gear device connected thereto. The required reduction ratio can be ensured with such a small gear device, so the overall device is small and light. To enable the reduction, it is possible to provide an inexpensive apparatus.

  Further, according to the stabilizer control device of the second aspect, since the two ring gears are integrally coupled in a state where the second ring gear is housed in the skirt portion of the sun gear, positioning at the time of assembly is easy. It is possible to maintain a stable bonding state. According to the third aspect of the present invention, since the first ring gear is fixed to the housing via the fixing ring, the first ring gear can be easily positioned with respect to the flexible gear or the like. it can.

  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 the 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 the present embodiment includes a rotor 43 that is a hollow member that is rotatably supported around one (11) of a pair of stabilizer bars, and a housing 50 that is fixed to the stabilizer bar 12 and rotatably supports the rotor 43. The motor 40 is fixed to the housing 50 as a driving means for rotationally driving the rotor 43, and the wave gear device 20 and the planetary gear device 30 are connected to the motor 40 and arranged in parallel in the housing 50. In this embodiment, a flat and thin harmonic drive (registered trademark of Harmonic Drive Systems Co., Ltd.) mechanism described in Non-Patent Document 1 described above is used as the wave gear device 20. 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. 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 this embodiment, the housing 52 is formed in a container shape, and includes a cylindrical housing 51 that is integrally joined to the opening end portion by serration coupling, and a lid member 53 that is fixed to the opening end portion. The entire housing 50 is constructed. An output portion of the planetary gear device 30 is fixed to the housing 52 and the stabilizer bar 11, and is configured to decelerate and output the rotation of the motor 40. On the other hand, the input portion of the wave gear device 20 is fixed to the rotor 43.

  The rotor 43 (hollow member) has a multi-pole magnet (not shown) attached to the outer peripheral surface of the cylindrical member, and constitutes a rotor (rotor) of the motor 40. As shown in FIG. Both ends are rotatably supported on the inner surface of the housing 51 and its lid member 53 via bearings (63a, 63b), and the stabilizer bar 11 is inserted into these hollow portions. On the other hand, the stator (stator) 41 of the motor 40 is disposed so as to surround the rotor 43 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 which is magnetized so as to be in phase with the magnet of the rotor 43 and is arranged in an annular shape on the outer peripheral surface of the rotor 43. Although the Hall IC 82 is used, 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 disposed, and are disposed close to each other so that the end portions 11a and 12a in the axial direction face each other. A ring member 52 a is fixed to the housing 52, and the ring member 52 a is serrated to the tip 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, the bearing portion 35 is integrally coupled (serrated coupling) to the tip portion 11a of the stabilizer bar 11, and a container-like nut 71 is screwed to the bearing portion 35, and the bolt 70 is fitted to the tip portion 11a. Are screwed together. 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.

  Next, in the wave gear device 20, the first ring gear 21 having a thread groove formed on the inner peripheral surface is fixed (serrated) to the fixing ring 25 that is press-fitted and fixed in the housing 50 (52). ing. A second ring gear 22 having a thread groove formed on the inner peripheral surface is juxtaposed with the first ring gear 21. Further, a flexible gear 23 having a screw thread having the same number of teeth as that of the screw groove of the first ring gear 21 and two teeth smaller than the number of teeth of the screw groove of the second ring gear 22 is formed on the outer peripheral surface. The first and second ring gears 21 and 22 are arranged so as to be screwed together. The elliptical gear 24 is fixed (serrated) to the rotor 43 so that the flexible gear 23 is partially meshed with the first and second ring gears 21 and 22. As described above, since the first ring gear 21 is fixed to the housing 50 via the fixing ring 25, the first ring gear 21 can be easily positioned with respect to the flexible gear 23 and the like.

  On the other hand, in the planetary gear device 30, the sun gear 31 that is an external gear is integrally coupled to the second ring gear 22, and is rotatably supported with the second ring gear 22 with respect to the stabilizer bar 11. Further, the third ring gear 33 of the internal gear is press-fitted and fixed to the housing 50 (52), and the planetary gear 32 of the external gear is engaged with the sun gear 31 and the third ring gear 33 so as to rotate around the sun gear 31. It is arranged. A carrier 34 that rotatably supports the planetary gear 32 is fixed (serrated) to the stabilizer bar 11 via a bearing portion 35 and is rotatably supported by the housing 50.

  The sun gear 31 is integrally formed with a skirt portion 31 a so as to surround the outer peripheral surface of the second ring gear 22. In FIG. 1, after the second ring gear 22 is fitted into the skirt portion 31 a of the sun gear 31, the sun gear 31 and the second ring gear 22 are fixed by the screw B. Thus, positioning when the sun gear 31 and the second ring gear 22 are assembled is easy, and a stable coupled state of both can be maintained. Alternatively, as shown in FIG. 2, the skirt portion 31a of the sun gear 31 and the second ring gear 22 are fixed by serration coupling, and the second gear gear 22 is accommodated in the skirt portion 31a. The ring gear 22 may be integrally coupled.

  The operation of the wave gear device 20 and the planetary gear device 30 configured as described above will be mainly described. By the rotational drive of the motor 40, the rotational motion is transmitted to the elliptical gear 24 fixed to the rotor 43. At this time, the flexible gear 23 bent in an elliptical shape on the outer periphery of the elliptical gear 24 has the number of teeth of the screw thread formed on the outer peripheral surface of the first gear on the input side fixed to the housing 50. Since the number of teeth of the thread groove of the ring gear 21 is the same as the number of teeth of the screw groove of the second ring gear 22 on the output side that is not fixed to the housing 50, the rotational motion of the elliptical gear 24 is reduced. Is reduced to about 1/70, for example, and transmitted to the second ring gear 22.

  Subsequently, the rotational motion of the second ring gear 22 is transmitted to the sun gear 31 integrally coupled thereto, and the rotational motion of the sun gear 31 is further transmitted via the planetary gear 32 between this and the third ring gear 33. For example, the speed is reduced to about ３ and transmitted to the carrier 34. Since the carrier 34 is fixed to the stabilizer bar 11 via the bearing portion 35 so as to prevent rotation, the stabilizer bar 11 rotates with respect to the housing 50 (to which the stabilizer bar 12 is fixed). Become.

  As a result, the rotational driving force of the motor 40 is transmitted as a relative rotational driving force between the stabilizer bar 11 and the stabilizer bar 12 via the wave gear device 20 and the planetary gear device 30, and torsion is applied with high torque. Become. Therefore, by making the output of the motor 40 variable, the torsional rigidity of the stabilizer bar 11 and the stabilizer bar 12 can be made variable.

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 of the actuator part in the stabilizer control apparatus which concerns on other embodiment of this invention.

Explanation of symbols

11, 12 Stabilizer bar 20 Wave gear device 21 First ring gear 22 Second ring gear 23 Flexible gear 24 Elliptical gear 30 Planetary gear device 31 Sun gear 31a Skirt portion 32 Planetary gear 33 Third ring gear 34 Carrier 35 Bearing portion 40 Motor 50, 51, 52 housing

Claims (3)

  In a stabilizer control device including a pair of stabilizer bars disposed between left and right wheels of a vehicle, a hollow member rotatably supported around one of the pair of stabilizer bars, and the other of the pair of stabilizer bars A housing that is fixed and rotatably supports the hollow member, a driving means that is fixed to the housing and rotationally drives the hollow member, and a wave gear device and a planetary gear that are connected to the driving means and arranged in parallel in the housing The wave gear device is fixed to the housing and has a first ring gear formed with a screw groove on the inner peripheral surface, and is arranged in parallel with the first ring gear, and the screw groove is formed on the inner peripheral surface. A thread crest having the same number of teeth as that of the formed second ring gear and the number of teeth of the thread groove of the first ring gear and two less than the number of teeth of the thread groove of the second ring gear. A flexible gear formed on an outer peripheral surface and screwed into a screw groove of the first and second ring gears, and fixed to the hollow member in a state of preventing rotation, and the flexible gear is fixed to the first gear. And an elliptical gear that partially meshes with the second ring gear, wherein the planetary gear unit is integrally coupled to the second ring gear, and the second ring gear is connected to one of the pair of stabilizer bars. An external gear sun gear rotatably supported, a third ring gear of an internal gear fixed to the housing, and an external tooth that is screwed into the third ring gear and the sun gear and rotates around the sun gear. A planetary gear of a gear and a carrier that rotatably supports the planetary gear, and is fixed to one of the pair of stabilizer bars and rotatable with respect to the housing Stabilizer control apparatus characterized by comprising comprises a carrier that is supported.   The sun gear has a skirt portion formed so as to surround an outer peripheral surface of the second ring gear, and the sun gear is in the state in which the second ring gear is accommodated in the skirt portion. The stabilizer control device according to claim 1, wherein the stabilizer control device is integrally coupled to the stabilizer control device.   The stabilizer control device according to claim 1 or 2, wherein the first ring gear is fixed to the housing via a fixing ring fixed in the housing.

Images