JP2006062508A - Actuator device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an actuator device capable of certainly precluding a poor performance of operation, noise emission, etc. owing to deflection of the drive shaft of a motor. <P>SOLUTION: The actuator device 10 is equipped with a case 11 having a cover covering a motor accommodation part 11a and a gear accommodation part 11b, a motor 20 accommodated in the motor accommodation part 11a, an output gear 28 accommodated in the gear accommodation part 11b rotatably and driven by the drive shaft 21 of the motor 20 through decelerating gears 26, an output shaft 29 rotating together with the output gear 28, and an output member attached to the output shaft 29, wherein projections 11f and 11g are formed on the side walls 11e and 11e and the bottom wall 11c of the motor accommodation part 11a, and in such a manner as capable of floating freely, the motor 20 surrounded by a cylindrical resilient member 22 is supported between the projections 11f and 11g in the motor accommodation part 11a. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an actuator device suitable for use in, for example, a steering lock device that locks or unlocks a steering shaft of a vehicle.

  A conventional steering lock device includes a case having a cover that covers a motor housing portion and a gear housing portion, a motor housed in the motor housing portion of the case, and a gear housing portion of the case that is rotatably accommodated. An output gear that is rotationally driven by a drive shaft via a reduction gear, an output shaft that is fixedly passed through the shaft portion of the output gear, rotates together with the output gear, and is attached to the output shaft to lock the steering shaft. And an output cam used for unlocking, and a pair of limit switches that are arranged in the gear housing portion of the case and are turned on or off by a cam portion formed integrally with the shaft portion of the output gear. .

  Further, on the upper surface of the output gear, a protrusion that is in contact with and locked to a protrusion that protrudes from the inner surface of the cover is provided. When the projection of the output gear and the projection of the cover come into contact with each other, the cam portion of the shaft portion of the output gear turns on the limit switch and the motor is turned off. In order to absorb the load when the projections of the output gear and the projections of the cover are engaged with each other, an elastic body is attached to the projections of the cover.

  As actuator devices used in this type of steering lock device, those shown in FIGS. 25 and 26 are known (see, for example, Patent Document 1).

  25 and 26, the actuator device 1 is accommodated in a case 2 having a cover (not shown) that covers the motor accommodating portion 2a and the gear accommodating portion 2b, and the motor accommodating portion 2a of the case 2. An output gear 6 rotatably accommodated in a gear accommodating portion 2b of the case 2 and rotationally driven by a worm 4b of a drive shaft 4 of the motor 3 via a plurality of reduction gears 5A, 5B, 5C; An output shaft 7 that passes through and is fixed to the center of the output gear 6 and rotates together with the output gear 6, and a sector gear that is attached to the output shaft 7 and used to lock and unlock the steering shaft (both not shown) ) Etc.

  As shown in FIG. 26, the motor 3 has rubber O-rings 8a and 8b fitted in the front and rear bearing portions 3a and 3b. The bearings 3a and 3b are in contact with the side walls of the motor housing 2a through the O-rings 8a and 8b, and the motor 3 is held by the case 2. The tip 4a of the drive shaft 4 of the motor 3 is rotatably supported via a curved leaf spring 9 as a bearing.

Japanese Patent Laid-Open No. 9-215261

JP 2002-205622 A

JP 2002-326559 A

  However, in the conventional actuator device 1, the motor 3 is in contact with the side wall portion of the motor housing portion 2a of the case 2 via the rubber O-rings 8a and 8b fitted into the bearing portions 3a and 3b. 26, since there is no floating support structure by an elastic member or the like between the motor 3 and the side wall portion of the motor housing portion 2a of the case 2, as shown in FIG. The reaction force F from the reduction gear 5A acts on the drive shaft 4 of the motor 3, the drive shaft 4 of the motor 3 bends in the direction of arrow P with the bearing portion 3a as a fulcrum, and the motor 20 of the motor housing portion 2a The side wall portions are loose and easily inclined (shifted), and the reaction force F cannot be sufficiently absorbed only by the elastic force of the rubber O-rings 8a and 8b. Further, due to the bending of the drive shaft 4 of the motor 3 and the like, the meshing state of the worm 4b of the drive shaft 4 of the motor 3 and the reduction gear 5A deteriorates, and malfunctions and noise (operation noise) are likely to occur. .

  Therefore, the present invention has been made to solve the above-described problems, and can reliably suppress the deflection of the drive shaft of the motor and the displacement of the motor due to the reaction force from the reduction gear within a predetermined range. It is an object of the present invention to provide an actuator device that can reliably prevent malfunctions, noises, and the like due to bending of a motor drive shaft and displacement of the motor.

  The invention according to claim 1 is a case having a cover that covers the motor accommodating portion and the gear accommodating portion, a motor accommodated in the motor accommodating portion of the case, and a gear accommodating portion of the case that is rotatably accommodated, An actuator comprising: an output gear that is rotationally driven by a drive shaft of a motor via a reduction gear; an output shaft that is rotatably supported by the case and rotates together with the output gear; and an output member that is attached to the output shaft. In the apparatus, convex portions are respectively formed on both side walls and the bottom wall of the motor accommodating portion, and the motor surrounded by a cylindrical elastic member is supported in a floating manner between the convex portions in the motor accommodating portion. Features.

  A second aspect of the invention is the actuator device according to the first aspect, wherein at least a pair of convex portions extending in parallel with the bottom wall of the motor housing portion are formed, and the bottom portion of the cylindrical elastic member is formed. It is characterized in that at least a pair of convex portions extending in parallel so as to cross the at least one pair of convex portions are formed.

  A third aspect of the present invention is the actuator device according to the first aspect, wherein a harness holding portion is formed on each side portion of the cylindrical elastic member.

  A fourth aspect of the present invention is the actuator device according to the first aspect, wherein a terminal pressing portion is formed on an upper portion of the cylindrical elastic member.

  A fifth aspect of the present invention is the actuator device according to the first aspect, wherein the cylindrical elastic member is formed of a thermoplastic elastomer-based resin material.

  As described above, according to the first aspect of the present invention, the convex portions are formed on the both side walls and the bottom wall of the motor accommodating portion, and the convex portions in the motor accommodating portion are surrounded by the cylindrical elastic member. By supporting the motor in a floating manner, the motor drive shaft bends (deforms) due to the reaction force from the reduction gear through the convex portions of the side walls and the bottom wall of the motor housing portion and the elastic member. The shift can be reliably suppressed within a predetermined range, and the occurrence of malfunctions and noise due to the deflection of the motor drive shaft and the motor shift can be reliably prevented.

  According to the second aspect of the present invention, at least a pair of convex portions extending in parallel to the bottom wall of the motor accommodating portion are formed, and parallel to at least the pair of convex portions at the bottom portion of the cylindrical elastic member. By forming at least a pair of convex portions extending in the direction from each other, at least a pair of convex portions on the bottom wall of the intersecting motor housing portion and at least a pair of convex portions on the bottom portion of the cylindrical elastic member, It is possible to more reliably absorb the deflection of the drive shaft of the motor and the displacement of the motor due to the reaction force, and to provide a highly accurate actuator device at low cost.

  According to the invention of claim 3, by forming the harness holding portions on both sides of the cylindrical elastic member, each harness in which the core wire is soldered to the pair of terminals attached to the motor is connected to the elastic member. It can be positioned and securely held by the respective harness holding portions on both sides, and it can be reliably prevented that the load applied to each harness is transmitted to the soldered portion.

  According to the invention of claim 4, by forming the terminal pressing part on the upper part of the cylindrical elastic member, the terminal inserted into the terminal connecting part of the motor is surely pressed by the terminal pressing part on the upper part of the elastic member. Can be reliably prevented from coming off.

  According to the fifth aspect of the present invention, since the cylindrical elastic member is formed of the thermoplastic elastomer resin material, the durability of the cylindrical elastic member can be further improved.

  Embodiment 1 of the present invention will be described below with reference to the drawings.

  1 is an exploded perspective view of a steering lock device according to a first embodiment of the present invention, FIG. 2 is a plan view of the device, FIG. 3 is a bottom view of the device, and FIG. 4 is a perspective view of the device viewed from the bottom side. 5 is a rear view of the apparatus, FIG. 6 is a plan view inside the case of the apparatus, FIG. 7 is a sectional view taken along line XX in FIG. 2, and FIG. 8 is a side view of a motor used in the apparatus. 9 is a plan view of the motor, FIG. 10A is a rear view of a cylindrical elastic member attached to the motor, FIG. 10B is a side view of the elastic member, and FIG. FIG. 11A is an enlarged sectional view showing a terminal connection portion of the motor, FIG. 11B is an enlarged sectional view showing a state in which a terminal is connected to the terminal connection portion, and FIG. 11C. Is a partial plan view of the motor with the terminal connected, FIG. 12 is a sectional view taken along line YY in FIG. 2, FIG. 13 is an enlarged sectional view of the Z portion in FIG. 14 (a) is an explanatory view showing the relationship between the output shaft, stopper body, damper and cover stopper used in the apparatus, FIG. 14 (b) is a cross-sectional view taken along the line P-P in FIG. 14 (a), FIG. 15 (a) is a sectional view of the tip of the output shaft, FIG. 15 (b) is a side view of the tip of the output shaft, FIG. 16 (a) is a plan view of the stopper body, and FIG. 16A is a sectional view taken along line Q-Q, FIG. 17A is a plan view of the damper, FIG. 17B is a sectional view of the damper, and FIG. 18A is a main part of the cover. 18B is a sectional view taken along line RR in FIG. 18A, FIG. 19A is a side view of the lower end portion of the output shaft, and FIG. 19B is the output shaft. FIG. 20 to FIG. 24 explain the relationship between the rotation state of the output shaft and the operation state of the limit switch step by step. It is an explanatory diagram.

  As shown in FIGS. 1 to 6, the steering lock device (actuator device) 10 includes a box case 11 made of a synthetic resin having a motor housing portion 11a and a gear housing portion 11b communicating with the motor housing portion 11a. A synthetic resin cover 12 is provided that is fastened and fixed with screws 15 so as to cover the motor housing portion 11a and the gear housing portion 11b of the case 11. A motor 20 is accommodated in the motor accommodating portion 11a of the case 11, and the tip 21a of the armature shaft (drive shaft) 21 is rotatably supported by the bearing 17 held by the bearing holding portion 11d of the gear accommodating portion 11b. Has been. A rubber O-ring (vibration isolation member) 18 is fitted into the small diameter portion 17 a of the bearing 17. The tip end 21a of the armature shaft 21 of the motor 20 is supported by the bearing holding portion 11d of the gear housing portion 11b so as to float freely by the bearing 17 and the rubber O-ring 18. Further, a worm 21b is formed on the distal end side of the armature shaft 21, and the worm 21b enters the gear housing portion 11b. When current is supplied to an armature coil of an armature (not shown) attached to the armature shaft 21, the armature is rotated forward or backward, and when the current supplied to the armature coil is interrupted, the electromagnetic braking circuit is Thus, an electromagnetic braking current flows through the armature coil.

  As shown in FIGS. 1 and 6, on both sides of the opposite side walls 11e and 11e of the motor accommodating portion 11a of the case 11 (in the vicinity of each corner portion), a pair of convex portions 11f extending in parallel in the vertical direction, 11f is integrally formed to project. Further, as shown in FIG. 7, a pair of convex portions 11g and 11g extending in parallel with the width direction are integrally formed on the bottom wall 11c in the motor accommodating portion 11a. The motor 20 is supported on the convex portions 11f and 11g of the motor accommodating portion 11a via an elastic member 22 attached to the motor 20 so as to be freely floating. In addition, rubber O-rings 20c and 20d are fitted into the front and rear bearing portions 20a and 20b of the motor 20, and the bearing portions 20a and 20b are inserted into the bearing holding portions of the case 11 through the O-rings 20c and 20d. The motor 20 is supported by 16a and 16b, respectively, and is supported so that it can float freely before and after the motor accommodating portion 11a. That is, the motor 20 is in the motor housing portion 11a and is supported by the case 11 in a freely floating manner by the elastic member 22 and the O-rings 20c and 20d.

  As shown in FIGS. 6-10, the elastic member 22 is formed in the cylinder shape, for example with the thermoplastic elastomer type resin material. That is, the elastic member 22 is formed in a cylindrical shape with an upper wall portion (upper portion) 22a, both side wall portions (both side portions) 22b and 22b, and a bottom wall portion (bottom portion) 22c. On the outer surface of the upper wall portion 22a and the bottom wall portion 22c of the elastic member 22, a pair of convex portions 22d and 22d extending in parallel in the front-rear direction are integrally formed. As shown in FIG. 7, each of the pair of convex portions 22d and 22d is a pair of convex portions formed integrally and projecting on the pair of convex portions 11g and 11g of the bottom wall 11c of the motor housing portion 11a and the inner surface 12a of the cover 12. It crosses over 12g and 12g, respectively. As a result, the motor 20 has the upper wall portion 22a of the elastic member 22 between the pair of convex portions 11g, 11g of the bottom wall 11c of the motor housing portion 11a and the pair of convex portions 12g, 12g of the inner surface 12a of the cover 12. A pair of convex portions 22d and 22d and a pair of convex portions 22d and 22d of the bottom wall portion 22c are supported in a floating manner.

  Further, a terminal pressing portion 22e is extended on the rear side of the upper wall portion 22a of the elastic member 22. As shown in FIGS. 9 and 11, the terminal holding portion 22 e is an L-shape that is inserted so as to come into contact with a substantially Z-shaped terminal connecting piece 23 that is a metal plate disposed in the hole 20 e of the motor 20. This is for pressing the shaped terminal 24. A core wire 25a of the harness 25 is sandwiched and soldered to a substantially V-shaped portion at one end of the terminal 24 (this soldered portion is indicated by a symbol H in FIG. 8). As shown in FIGS. 6 to 10, a pair of harness holding portions 22 f and 22 f that hold the harness 25 are integrally formed on the upper and lower portions of the side wall portions 22 b and 22 b of the elastic member 22.

  As shown in FIGS. 1, 6, 7, and 12, the gear housing portion 11 b of the case 11 includes a synthetic resin reduction gear 26 that is rotationally driven by the armature shaft 21 of the motor 20 and the reduction gear 26. And an output gear 28 made of synthetic resin, which is rotationally driven via each other, is rotatably accommodated. The reduction gear 26 has a large-diameter gear portion 26 b that meshes with the worm 21 b of the armature shaft 21 of the motor 20 and a small-diameter gear portion 26 c that meshes with the output gear 28. A round hole 26a is formed in the center of the reduction gear 26, and a support shaft 27 is passed through the round hole 26a. As shown in FIG. 12, the upper and lower ends of the support shaft 27 are fitted into the recess 11 h of the bottom wall 11 c of the case 11 and the recess 12 h of the inner surface 12 a of the cover 12, and the reduction gear is connected via the support shaft 27. 26 is rotatably supported.

  As shown in FIGS. 1, 6 and 12, a cylindrical output shaft 29 made of metal is integrally formed in a cylindrical gear body 28a of the output gear 28 by insert molding or the like. The lower end portion of the output shaft 29 with a small diameter is rotatably supported by a bearing 19 fitted to the bottom wall 11 c of the case 11, and the upper end portion 29 a with a small diameter of the output shaft 29 is a bearing formed on the cover 12. The part 12b is rotatably supported. As a result, both the output gear 28 and the output shaft 29 rotate. A cam portion 28c is integrally formed at the lower end of the gear main body portion 28a of the output gear 28. A pair of limit switches (switch means) 35, 35 that are turned on or off by the cam portion 28c are provided in the gear housing portion 11b of the case 11 facing the cam portion 28c. 37 and so on. Each limit switch 35 is connected with a pair of harnesses 38, 38 as shown in FIGS.

  As shown in FIGS. 1, 6, 12 and 14, an annular housing recess 28e for rotatably housing a stopper body 30 made of sintered metal is formed on the upper surface 28d of the output gear 28. is there. A projecting portion 29c is integrally formed on the lower side of the small diameter upper end portion 29a of the output shaft 29 facing the housing recess 28e. Further, as shown in FIG. 16, the stopper body 30 is formed in a substantially disc shape having a cylindrical portion 30a at the center thereof. The stopper body 30 has an inner peripheral surface 30 b of a cylindrical portion 30 a fitted into a large-diameter intermediate shaft portion 29 g of the output shaft 29, and the stopper body 30 is rotatably attached to the output shaft 29. Further, a locking projection 30c that locks and separates from the projection 29c of the output shaft 29 is integrally formed on the inner peripheral surface 30b of the cylindrical portion 30a. Further, on the upper surface 30d of the stopper body 30, four stoppers 31 that are in contact with and locked to the stoppers 13 of the cover 12 described later are integrally formed at regular intervals.

  As shown in FIGS. 12 to 14 and 18, four stoppers are provided on the inner surface 12 a of the cover 12 to restrict the rotation range of the output gear 28 so as to rotate the output gear 28 by a predetermined angle. 13 are integrally projected at predetermined intervals on the same circumference. A rubber damper 32 is interposed between the stoppers 13 on the inner surface 12a of the cover 12 (between the stoppers 31 of the stopper body 30 and the stoppers 13 on the inner surface 12a of the cover 12). As shown in FIG. 17, the damper 32 has an annular damper main body 32a. The annular damper main body 32a includes the stoppers 31 of the stopper body 30 and the stoppers 13 of the inner surface 12a of the cover 12. Four thick portions 32b disposed between them are integrally projected at predetermined intervals.

  That is, as shown in FIG. 14, before and after the rotation of the output gear 28 and the output shaft 29, each of the upper and lower dampers 32 positioned on the left and right facing the protrusion 29c of the output shaft 29 and the locking protrusion 30c of the stopper body 30 is provided. The pair of thick portions 32b and 32b are in contact with the opposing surfaces of the pair of upper and lower stoppers 13 and 13 positioned on the left and right of the inner surface 12a of the cover 12 in advance. Accordingly, the thick portion of the damper 32 mounted between the stoppers 13 on the inner surface 12a of the cover 12 and the stoppers 13 between the stoppers 31 of the stopper body 30 accommodated in the accommodating recesses 28e of the output gear 28. 32b is accommodated at substantially equal intervals. In addition, between the bottom surface of the housing recess 28e of the output gear 28 and the bottom surface of the stopper body 30, there are interposed an washer (bending washer) 33 and a pair of flat washers 34, 34 sandwiching the Earl washer 33. . The stopper 30 is always urged toward the inner surface 12a of the cover 12 by the elastic force of the isher 33.

  Further, as shown in FIGS. 12 and 13, a labyrinth protrusion 12 c that extends so as to surround a peripheral wall 28 f that forms an accommodation recess 28 e of the output gear 28 is formed outside each stopper 13 of the inner surface 12 a of the cover 12. It is formed to project integrally in an annular shape. The labyrinth protrusion 12c of the cover 12 and the peripheral wall 28f of the output gear 28 form a labyrinth structure.

  Further, as shown in FIGS. 12 and 19, a D-cut portion 29d for preventing rotation and a serration portion 29e for preventing rattling are provided at the lower end portion 29b of the output shaft 29 exposed outside the bottom wall 11c of the case 11. Each is formed, and a screw hole 29f is formed in the center thereof. An output cam (output member) 40 used for locking and unlocking a steering shaft (not shown) is fastened and fixed to the lower end portion 29b of the output shaft 29 via a screw 41.

  As described above, according to the steering lock device 10 of the first embodiment, when current is supplied to an armature coil (not shown) of the motor 20, the worm 21 b of the armature shaft 21 rotates and the output gear 28 rotates via the reduction gear 26. . The output shaft 29 rotates together with the rotation of the output gear 28.

  As shown in FIGS. 14A and 14B, from the state in which the stoppers 31 of the stopper body 30 housed in the housing recesses 28e of the output gear 28 are separated from the stoppers 13 of the cover 12, the output gear 28 is removed. When the output shaft 29 rotates by a predetermined angle in the direction of the arrow shown in FIG. 20 (a), as shown in FIG. 20 (b), the cam portion 28c formed integrally with the gear main body portion 28a of the output gear 28 is formed. As a result, the operation lever portion 35a of one limit switch 35 in the off state (OFF) disposed at the corner portion in the gear housing portion 11b of the case 11 is pushed, and the limit switch 35 is turned on (ON).

  When the limit switch 35 is turned on, a position detection signal is output to the motor 20 and the energization is turned off, and the current supplied to the armature coil is cut off. Even after the limit switch 35 is turned on, FIG. As shown, the output gear 28 and the output shaft 29 still rotate due to delay and coasting. At this time, for example, if the supply voltage is high or the ambient temperature is high, the overrun due to delay and coasting increases, and even after the limit switch 35 is turned on, as shown in FIG. The output shaft 29 further rotates in the direction of the arrow.

  Due to the rotation of the output gear 28 and the output shaft 29, as shown in FIG. 22 (a), the projection 29c of the output shaft 29 is engaged with the locking projection of the stopper body 30 accommodated in the accommodating recess 28e of the output gear 28. Press the part 30c. As a result, the stopper body 30 in the housing recess 28e of the output gear 28 rotates in the direction of the arrow as shown in FIG. 23A, and the two stoppers 31 facing each other of the stopper body 30 face each other. The two thick portions 32b facing each other of the rubber damper 32 mounted between the two stoppers 13 are respectively pressed. By this pressing, as shown in FIG. 24A, the two thick portions 32 b facing each other of the rubber damper 32 are bent, and the other two stoppers 31 facing each other of the stopper body 30 are covered with the cover. The two other stoppers 13 facing each other are brought into contact with and locked. At this time, the rotation of the output gear 28 and the output shaft 29 is stopped. The position where the output gear 28 stops is a position where the limit switch 35 can be kept on by the cam portion 28c.

  In this manner, the two opposing stoppers 31 of the stopper body 30 accommodated in the accommodating recess 28e of the output gear 28 are respectively connected to the cover 12 via the two opposing thick parts 32b of the rubber damper 32. The two opposing thick stoppers 32b are deflected by a predetermined amount, and then another two stoppers 31 of the stopper body 30 opposite to each other are attached to the cover 12. By making the two abutting stoppers 13 abut against each other and engaging with each other, the output gear 28 can always be stopped after being reliably rotated within a certain range. At this time, an impact (load) applied when the stoppers 13 of the cover 12 and the stoppers 31 of the stopper body 30 are brought into contact with each other is subjected to a pair of thick dampers of rubber dampers 32 attached to the stoppers 13 of the cover 12. The parts 32b and 32b can be compressed and reliably absorbed. Accordingly, deformation such as bending and lifting of the cover 12 can be reliably suppressed, and damage to each stopper 31 of the stopper body 30 and each stopper 13 of the cover 12 can be reliably prevented.

  Also, as shown in FIGS. 6 and 7, a pair of convex portions 22d and 22d extending in parallel in the front-rear direction are integrally formed on the outer surfaces of the upper wall portion 22a and the bottom wall portion 22c of the elastic member 22, respectively. The pair of protrusions 22d and 22d intersect with the pair of protrusions 11g and 11g integrally formed on the inner surface 12a of the cover 12 and the pair of protrusions 11g and 11g of the bottom wall 11c of the motor housing portion 11a. Thus, the motor 20 is configured such that the upper wall of the elastic member 22 is between the pair of convex portions 11g, 11g of the bottom wall 11c of the motor housing portion 11a and the pair of convex portions 12g, 12g of the inner surface 12a of the cover 12. The side walls 11e and 11e of the motor housing portion 11a are supported in a floating manner through the pair of convex portions 22d and 22d of the portion 22a and the pair of convex portions 22d and 22d of the bottom wall portion 22c. The armature shaft of the motor 20 through the convex portions 11f and 11g of the bottom wall 11c, the convex portions 12g of the inner surface 12a of the cover 12, and the convex portions 22d of the upper wall portion 22a and the bottom wall portion 22c of the elastic member 22. The armature shaft 21 can be reliably restrained from being deflected (deformed) by the reaction force F from the reduction gear 26 meshing with the worm 21b of 21 and the movement of the motor 20 within the motor housing portion 11a within a predetermined range. It is possible to reliably prevent the occurrence of malfunction and noise due to the bending of the armature shaft 21 of the motor 20 and the displacement of the motor 20.

  That is, the both side walls 11e and 11e of the motor accommodating portion 11a and the convex portions 11f and 11g of the bottom wall 11c, the convex portions 12g of the inner surface 12a of the cover 12, and the upper wall portion 22a of the elastic member 22 attached to the motor 20 Due to the floating support structure of the motor 20 by the convex portions 22d of the bottom wall portion 22c, the bending of the armature shaft 21 of the motor 20 due to the reaction force F from the reduction gear 26 and the displacement in the motor housing portion 11a of the motor 20 are predetermined. It can be reliably suppressed within the range. Further, before the limit value of the engagement ratio between the worm 21b of the armature shaft 21 and the reduction gear 26 is exceeded, the floating support structure can reliably absorb the engagement ratio between the worm 21b of the armature shaft 21 and the reduction gear 26. It can be ensured in a good state. Thereby, the highly accurate steering lock apparatus 10 can be provided at low cost.

  Further, as shown in FIGS. 7 to 11, the pair of upper and lower harness holding portions 22 f and 22 f are formed on both side walls 22 b and 22 b of the cylindrical elastic member 22 that supports the motor 20 in a floating manner. Each harness (lead wire) 25 in which the core wire 25a is soldered to the pair of terminals 24, 24 inserted into the pair of hole portions (terminal connection portions) 20e, 20e of the motor 20 is connected to both side wall portions of the elastic member 22. 22b and 22b can be positioned and securely held in a substantially C-shaped curved state via a pair of upper and lower harness holding portions 22f and 22f, and a load applied to each harness 25 from the outside is connected to each terminal 24. Transmission to the soldered portion H of the core wire 25a of each harness 25 can be reliably prevented.

  Further, since the terminal pressing portion 22e is integrally formed with the upper wall portion 22a of the cylindrical elastic member 22, the terminals 24 inserted into the pair of holes 20e, 20e of the motor 20 are connected to the upper wall portion 22a of the elastic member 22. The terminal pressing portion 22e can be surely pressed and can be reliably prevented from coming off. As described above, the cylindrical elastic member 22 has both a structure for supporting the motor 20 in a floating manner, a structure for positioning and holding the harness 25, and a structure for holding the terminal 24. Further, since the cylindrical elastic member 22 is formed of a thermoplastic elastomer resin material, the durability of the cylindrical elastic member 22 can be further improved.

  Further, the cam portion 28c is integrally formed on the gear main body portion 28a of the output gear 28 that houses the stopper body 30 that reliably stops the rotation of the output gear 28 and the output shaft 29 by each stopper 31. Can be reliably prevented from over the operating lever portion 35a of the limit switch 35, and the limit switch 35 can be reliably turned on or off by the cam portion 28c.

  In addition, according to the said Example 1, although the elastic member was made into the thermoplastic elastomer resin material, you may use other members, such as a rubber material. Further, although the rubber O-ring is used as the vibration isolating member, it is not limited to this. Furthermore, rubber dampers are attached to the four stoppers of the cover, and the opposing thick parts of the damper are pressed by the two opposing stoppers of the four stoppers of the stopper body. However, as a matter of course, the first embodiment can be applied to an example in which the four stoppers of the stopper body are brought into direct contact with and locked to the four stoppers of the cover without mounting the damper.

It is a disassembled perspective view of the steering lock device of Example 1 of the present invention. It is a top view of the steering lock device. It is a bottom view of the steering lock device. It is the perspective view which looked at the above-mentioned steering lock device from the bottom side. It is a rear view of the steering lock device. It is a top view in the case of the steering lock device. It is sectional drawing which follows the XX line in FIG. It is a side view of the motor used for the above-mentioned steering lock device. It is a top view of the said motor. (A) is a rear view of the cylindrical elastic member with which the said motor is mounted | worn, (b) is a side view of the elastic member, (c) is a top view of the elastic member. (A) is an enlarged sectional view showing a terminal connection portion of the motor, (b) is an enlarged sectional view showing a state where a terminal is connected to the terminal connection portion, and (c) is a portion of the motor in a state where the terminal is connected. It is a top view. It is sectional drawing which follows the YY line in FIG. It is an expanded sectional view of the Z part in FIG. (A) is explanatory drawing which shows the relationship between the output shaft used for the said steering lock apparatus, a stopper body, a damper, and the stopper of a cover, (b) is sectional drawing which follows the PP line in the same (a) figure. (A) is sectional drawing of the front-end | tip part of the said output shaft, (b) is a side view of the front-end | tip part of the same output shaft. (A) is a top view of the said stopper body, (b) is sectional drawing which follows the QQ line in the (a) figure. (A) is a top view of the said damper, (b) is sectional drawing of the same damper. (A) is a bottom view of the principal part of the said cover, (b) is sectional drawing which follows the RR line | wire in the same (a) figure. (A) is a side view of the lower end part of the said output shaft, (b) is a bottom view of the lower end part of the same output shaft. (A) is explanatory drawing which shows the state which the said output shaft rotated the predetermined angle, (b) is explanatory drawing which shows the state just before ON operation of one limit switch in the same state. (A) is explanatory drawing which shows the state before the projection part of the said output shaft contacts the latching convex part of a stopper body, (b) is explanatory drawing which shows the ON state of one limit switch in the same state. (A) is explanatory drawing which shows the state which pushes the latching convex part of a stopper body with the projection part of the said output shaft, (b) is explanatory drawing which shows the operation state of one limit switch in the same state. (A) is explanatory drawing which shows the state which pushes the thick part of a damper between the stoppers of a cover by rotation of the said stopper body, (b) is explanatory drawing which shows the operation state of one limit switch in the same state. . (A) is explanatory drawing which shows the state which bent the thick part of the damper between the stopper of the said stopper body, and the stopper of a cover, (b) is explanatory drawing which shows the operation state of one limit switch in the same state It is. It is a top view which shows the inside of the actuator apparatus used for the conventional steering lock apparatus. It is a top view which shows the support part of the motor of the said conventional actuator apparatus.

Explanation of symbols

10 Steering lock device (actuator device)
DESCRIPTION OF SYMBOLS 11 Case 11a Motor accommodating part 11b Gear accommodating part 11c Bottom wall 11e, 11e Both-side wall 11f, 11f A pair of convex part 11g, 11g A pair of convex part 12 Cover 20 Motor 21 Armature shaft (drive shaft)
22 Elastic member 22a Upper wall part (upper part)
22b, 22b Both side walls (both sides)
22c Bottom wall (bottom)
22d, 22d A pair of convex portions 22e Terminal pressing portion 22f Harness holding portion 26 Reduction gear 28 Output gear 29 Output shaft 40 Output cam (output member)

Claims (5)

A case having a cover that covers the motor housing and the gear housing, a motor housed in the motor housing of the case, a reduction gear that is rotatably housed in the gear housing of the case, and is driven by the drive shaft of the motor In an actuator device comprising: an output gear that is rotationally driven via the output shaft; an output shaft that is rotatably supported by the case and rotates together with the output gear; and an output member that is attached to the output shaft.
Convex portions are formed on both side walls and the bottom wall of the motor accommodating portion, respectively, and the motor surrounded by a cylindrical elastic member is supported between the convex portions in the motor accommodating portion so as to be freely floating. Actuator device. The actuator device according to claim 1,
At least a pair of convex portions extending in parallel to the bottom wall of the motor housing portion are formed, and at least a pair extending in parallel so as to intersect the at least the pair of convex portions at the bottom portion of the cylindrical elastic member. An actuator device characterized in that each of the convex portions is formed. The actuator device according to claim 1,
An actuator device, wherein harness holding portions are formed on both side portions of the cylindrical elastic member. The actuator device according to claim 1,
An actuator device, wherein a terminal pressing portion is formed on an upper portion of the cylindrical elastic member. The actuator device according to claim 1,
An actuator device characterized in that the cylindrical elastic member is formed of a thermoplastic elastomer resin material.

Images