JP2007263619A - Method for verifying and inspecting operation of actuator, and actuator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for verifying and inspecting the operation of actuators and capable of reliably preventing cam surfaces of output cams from being damaged at inspection. <P>SOLUTION: The actuator includes an output gear 23 to be driven to rotate by a driving shaft of a motor via reduction gears; an output shaft 24 rotating with the output gear 23; and output cams 26 and 26' provided in radial directions of the output shaft 24. A jig 50 for inspection is connected to each of the output cams 26 and 26' of the actuator to inspect the operation of each of the output cams 26 and 26' in the method for verifying and inspecting the operation of actuators. A main shaft part 52 of a jig 50 for inspection is fitted in a main hole part 26c formed in one face 26a of one output cam 26, and a sub shaft part 53 of the jig 50 for inspection is fitted in a sub hole part 26d formed in one face 26a of the other output cam 26' to verify and inspect the operation of each of the output cams 26 and 26'. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

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

  As this type of actuator, there is one shown in FIGS. 9 and 10 (see, for example, Patent Document 1).

  As shown in FIGS. 9 and 10, the actuator 1 is assembled to a case 2 made of synthetic resin having a motor housing portion 2a and a gear housing portion 2b, and a side wall 2c of the case 2, and the motor housing portion 2a and A cover 3 made of synthetic resin covering the gear housing 2b, a motor 4 housed in the motor housing 2a of the case 2, and a gear housing 2b of the case 2 are rotatably housed, and the drive shaft 4a of the motor 4 A synthetic resin output gear 6 that is rotationally driven by the worm 4b through the reduction gear 5 and a metal output shaft 7 that is fixedly penetrated by the shaft portion 6a of the output gear 6 and rotates together with the output gear 6. And an output cam 8 which is fixed to the lower portion 7a of the output shaft 7 via a screw B and used to lock and unlock a steering shaft (not shown), and the gear housing of the case 2 2b, and a pair of limit switches 9, 9 that are turned on or off by a cam portion (not shown) formed integrally with the shaft portion 6a of the output gear 6 (see, for example, Patent Document 1). .)

  Then, as shown in FIG. 10, when performing the operation inspection of the actuator 1, that is, when measuring the rotation angle of the output cam 8, an inspection jig G having a concave portion g having the same shape as the output cam 8 is used. The concave portion g of the inspection jig G is fitted to the output cam 8 and the operation confirmation of the actuator 1 is inspected.

JP 2005-319866 A

  However, in the conventional actuator 1, since the concave portion g of the inspection jig G is directly fitted to the cam surface of the output cam 8 without a gap in order to perform accurate operation confirmation, the inspection jig G When the output cam 8 is attached to or detached from the recess g, the cam surface of the output cam 8 may be damaged and the function as the cam may be impaired.

  Therefore, the present invention has been made to solve the above-described problems, and an object thereof is to provide an actuator operation confirmation inspection method and an actuator that can reliably prevent the cam surface of the output cam during inspection. And

  The invention of claim 1 comprises an output gear that is rotationally driven by a drive shaft of a motor via a reduction gear, an output shaft that rotates together with the output gear, and an output cam that is provided in the radial direction of the output shaft. In the actuator operation check inspection method, in which an inspection jig is connected to the output cam of the actuator and the operation of the output cam is inspected, the inspection portion is connected to a connecting portion formed on one surface side of the output cam. The operation of the output cam is inspected by connecting a jig.

  A second aspect of the present invention is the actuator operation check and inspection method according to the first aspect, wherein the connecting portion includes a main hole formed at a rotation center of the output cam and a position displaced from the main hole. And the inspection jig has a main shaft portion fitted into the main hole portion, and a sub shaft portion fitted into the sub hole portion, Each shaft portion is fitted in each of these hole portions, and the operation of the output cam is inspected by rotating the inspection jig around the main shaft portion.

  According to a third aspect of the present invention, there is provided an output gear that is rotationally driven by a motor drive shaft through a reduction gear, an output shaft that rotates together with the output gear, and an output cam that is provided in a radial direction of the output shaft. The actuator is characterized in that a connecting portion for connecting an inspection jig is formed on one side of the output cam.

  According to a fourth aspect of the present invention, in the actuator according to the third aspect, the connecting portion includes a main hole portion formed at the rotation center of the output cam and a sub-portion formed at a position displaced from the main hole portion. It is characterized by comprising a hole.

  The invention according to claim 5 is the actuator according to claim 4, wherein the output shaft and the output cam are integrally formed of synthetic resin, and the main hole portion and the sub hole portion form a meat stealer. It is characterized by.

  As described above, according to the first and third aspects of the invention, when the operation is confirmed, the inspection jig does not come into contact with the cam surface of the output cam. Can be reliably prevented.

  According to the second and fourth aspects of the invention, since the main hole portion and the sub hole portion are provided on one surface side of the output cam, the inspection jig can be used even when the output cam having a different shape is used. Can be shared.

  According to the invention of claim 5, since each hole portion formed on one surface side of the output cam can be used as a meat stealing portion, the operation check can be performed without damaging the shape of the cam surface of the output cam. Can do.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

  1 is an exploded perspective view of an actuator according to an embodiment of the present invention, FIG. 2 is an enlarged plan view around the output gear of the actuator, FIG. 3 is an enlarged cross-sectional view around the output gear of the actuator, and FIG. FIG. 5 is a cross-sectional view of the main part of the inspection jig used for the operation confirmation inspection, and FIG. 6 shows a state before the inspection jig is connected to the output cam of the actuator. 7 is a cross-sectional view of the main part showing a state in which the inspection jig is connected to the output cam of the actuator, and FIG. 8 is an inspection for performing an operation confirmation inspection of the actuator using the inspection jig. 1 is a schematic block diagram of a system.

  As shown in FIGS. 1 to 3, an actuator 10 suitable for use in a steering lock device has a motor housing portion 11a and a gear housing portion 11b communicating with the motor housing portion 11a, and the gear housing portion 11b. A box-shaped case 11 made of a synthetic resin with a cylindrical support shaft 12 integrally projecting thereon, a motor housing portion 11a and a gear housing portion 11b of the case 11 and a circular hole-shaped bearing portion 14 are formed; In addition, a cover 13 made of a synthetic resin that covers the entire case 11 and is fastened and fixed by screws 15 is provided.

  A motor 20 is housed in the motor housing portion 11a of the case 11, and the split shaft 21a on the distal end side of the armature shaft (drive shaft) 21 is attached to the bearing 16 held by the bearing holding portion 11c of the gear housing portion 11b. It is supported rotatably. As shown in FIGS. 1 and 2, the armature shaft 21 and the split shaft 21a that forms the tip of the armature shaft 21 are connected via a worm (reduction gear) 22, and the worm 22 enters the gear housing 11b. It is out. 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 to 3, the gear housing portion 11 b of the case 11 rotatably accommodates a synthetic resin output gear 23 that meshes with the worm 22 of the armature shaft 21 of the motor 20 and is driven to rotate. It is. The output gear 23 includes an output shaft 24 that forms a support shaft, a gear portion 25 that is integrally formed at the center of the output shaft 24 and meshes with the worm 22 of the armature shaft 21 of the motor 20, and a large diameter of the output shaft 24. And a pair of output cams 26, 26 'integrally formed in the radial direction of the upper surface 24b of the portion (upper part) 24a. The pair of output cams 26, 26 ′ are exposed to the outside of the circular hole-shaped bearing portion 14 formed in the ceiling wall 13 a of the cover 13, and are used to lock and unlock a steering shaft (not shown). Used for.

  As shown in FIGS. 1 to 3 and FIGS. 6 and 7, one output cam 26 is integrally formed at the center of the upper surface 24 b of the large diameter portion 24 a of the output shaft 24 and the other output cam 26 ′. Is integrally projected at a position displaced from one output cam 26. In addition, a circular concave main hole (connecting portion) 26c is formed at the rotation center O of the upper surface (one surface) 26a of one output cam 26, and at the base of the upper surface 26a of the other output cam 26 '. A circular concave sub-hole (connecting portion) 26d is formed.

  As shown in FIGS. 1 and 3, a cylindrical support shaft 12 is integrally formed so as to protrude upward at the center of the bottom wall 11 d of the gear housing portion 11 b of the case 11. The small diameter portion (lower portion) 24d of the output shaft 24 of the output gear 23 is formed with a circular concave bearing portion 24e fitted to the support shaft 12, and the inner end surface (bottom surface) of the bearing portion 24e. 24f is slidably mounted on the upper surface 12a of the cylindrical support shaft 12. Further, the opening end of the bearing portion 24 e, that is, the lower end 24 g of the small diameter portion 24 d of the output shaft 24 is separated from the bottom wall 11 d of the case 11 by a predetermined clearance. As a result, the output shaft 24 of the output gear 23 is supported by the cylindrical support shaft 12 so as to rotate smoothly.

  As shown in FIGS. 1 and 3, a circular hole-shaped bearing portion 14 is formed at a position facing the support shaft 12 of the ceiling wall 13 a of the cover 13. The outer peripheral surface 24c of the large diameter portion 24a of the output shaft 24 is rotatably supported on the inner peripheral surface 14a of the circular hole-shaped bearing portion 14.

  As shown in FIGS. 1 to 3, the gear portion 25 of the output gear 23 is integrally formed below the large-diameter portion 24 a of the output shaft 24. Further, on the outer peripheral surface 24c of the large-diameter portion 24a of the output shaft 24, an arc-shaped and block-shaped stopper portion 27 that is abutted and locked to a stopper portion (not shown) formed on the inner surface of the ceiling wall 13a of the cover 13 is provided. Integrally protruding. The stopper portion 27 is integrally formed in an arc shape with a predetermined width dimension in the circumferential direction from the outer peripheral surface 24 c of the large diameter portion 24 a of the output shaft 24.

  As shown in FIG. 2, a cam portion 28 is integrally formed on the outer periphery of the small diameter portion 24 d of the output shaft 24. A pair of limit switches (switch means) that are turned on or off by the cam portion 28 when the output gear 23 rotates by a predetermined angle are provided on the bottom wall 11d in the gear housing portion 11b of the case 11 facing the cam portion 28. ) 30, 30 are attached via a switch holder 35 made of synthetic resin. Further, as shown in FIG. 3, the operation lever portions 31 of the limit switches 30 other than the outer periphery of the bearing portion 24e of the output shaft 24, that is, the outer periphery of the small diameter portion 24d of the output shaft 24 are opposed to each other. Has a stepped relief portion 24h.

  As shown in FIGS. 1 and 3, a pair of limit switches (switch means) 30 and 30 for detecting the position of the output gear 23 are pressed into the gear housing portion 11 b of the case 11 by a synthetic resin switch holder 35. It is attached to be able to. The motor 20 is supported in a freely floating manner between the pair of bearing holding portions 11 e and 11 f of the case 11 via the elastic body 40.

  4 and 5 show an inspection jig 50 used in the operation confirmation inspection of the actuator 10. On the bottom surface 51 of the inspection jig 50, a large-diameter and short main shaft portion 52 fitted in the main hole portion 26c of one output cam 26, and a sub-hole portion 26d of the other output cam 26 '. A small-diameter and long sub-shaft portion 53 to be fitted is provided. When performing an operation check inspection of the actuator 10, as shown in FIGS. 6 and 7, the main shaft portion 52 of the large diameter and short length of the inspection jig 50 is inserted into the main hole portion 26 c of one output cam 26. And a long sub shaft 53 with a small diameter of the inspection jig 50 is fitted into the sub hole 26d of the other output cam 26 '.

  Next, the operation check inspection of the actuator 10 will be briefly described using the inspection system shown in FIG.

  First, when the armature shaft 21 of the actuator 10 is rotated by the inspection device 60, the height (displacement amount) of the pair of output cams 26 and 26 ′ is measured by the gauge 61 in synchronization with the rotation of the armature shaft 21. At the same time, the inspection jig 50 rotates around the main shaft 52 and the rotation angle of the pair of output cams 26 and 26 ′ is measured by the encoder 62. By measuring the amount of displacement of the pair of output cams 26, 26 'by the gauge 61, the cam unlocking, locking position, etc. are confirmed. Further, by measuring the rotation angle of the pair of output cams 26 and 26 ′ by the encoder 62, the on / off state of the pair of limit switches 30 and 30 is confirmed.

  In the actuator 10 and the inspection jig 50 configured as described above, when the operation of the actuator 10 is confirmed using the inspection jig 50, the inspection jig 50 is provided on each cam surface 26b of the pair of output cams 26 and 26 '. Since there is no direct contact, damage to the cam surfaces 26b of the pair of output cams 26, 26 'can be reliably prevented.

  In addition, a circular concave main hole 26c is formed at the rotation center O of the upper surface 26a of one output cam 26, and a circular concave sub hole 26d is provided at the base of the upper surface 26a of the other output cam 26 '. Therefore, the inspection jig 50 can be shared even when an output cam having a different cam surface or the like is used.

  Further, since the main hole portion 26c formed on the upper surface 26a of one output cam 26 and the sub hole portion 26d formed on the upper surface 26a of the other output cam 26 'can be used as a meat stealing portion, a pair of output cams The operation can be confirmed without any loss of the shape of each cam surface 26b of 26, 26 '.

  When a current is supplied to an armature coil (not shown) of the motor 20 of the actuator 10 that has been checked for operation confirmation in this way, the worm 22 of the armature shaft 21 rotates and the output gear 23 meshed with the worm 22 and The output shaft 24 of the output gear 23 is rotated.

  Each of the pair of limit switches 30, 30 in the off state (OFF) disposed in the gear housing portion 11 b of the case 11 by the cam portion 28 integrally formed on the small diameter portion 24 d of the output shaft 24 of the output gear 23. Each of the limit switches 30 is turned on (ON) when the operation lever portion 31 is pushed. When each of the limit switches 30 is turned on, a position detection signal is output to the motor 20 to turn off the energization, and the current supplied to the armature coil is cut off. Even after each limit switch 30 is turned ON, the output gear 23 continues to rotate due to delay and coasting, but the output gear stops due to electromagnetic braking of the armature, frictional resistance of the mechanism, or the like. Further, depending on the external environment such as the ambient temperature and the applied voltage, the output gear cannot be stopped immediately by the armature electromagnetic braking or the like, and the stopper portion 27 formed on the large diameter portion 24a of the output shaft portion 24 is The output gear 23 may stop in contact with a stopper portion 13g formed on the inner surface of the ceiling wall 13a. In the position where the output gear 23 stops, the cam portion 28 holds each limit switch 30 in the ON state.

  In addition, according to the said embodiment, the case where it used for a steering lock apparatus as an actuator was demonstrated, Of course, the said embodiment is applicable to actuators other than a steering lock apparatus.

It is a disassembled perspective view of the actuator of one Embodiment of this invention. It is an enlarged plan view of the periphery of the output gear of the actuator. It is an expanded sectional view around the output gear of the actuator. It is a bottom view of the inspection jig used for the operation check inspection of the actuator. It is sectional drawing of the principal part of the said jig | tool for an inspection. It is sectional drawing of the principal part which shows the state before connecting the said test jig | tool with the output cam of an actuator. It is sectional drawing of the principal part which shows the state which connected the said jig | tool for an inspection to the output cam of an actuator. It is a schematic block diagram of the inspection system which performs the operation check inspection of the actuator using the inspection jig. It is a disassembled perspective view of the conventional actuator. It is a bottom view of the conventional actuator.

Explanation of symbols

10 Actuator 20 Motor 21 Armature shaft (drive shaft)
22 Worm (reduction gear)
23 Output gear 24 Output shaft 26, 26 'Output cam 26a Upper surface (one surface)
26c Main hole (connecting part)
26d Sub hole (connecting part)
50 Inspection Jig 52 Main Shaft 53 Sub Shaft

Claims (5)

An actuator comprising an output gear that is rotationally driven by a drive shaft of a motor through a reduction gear, an output shaft that rotates together with the output gear, and an output cam that is provided in the radial direction of the output shaft is used. In the operation confirmation inspection method of the actuator, in which an inspection jig is connected to the output cam of the actuator and the operation of the output cam is inspected,
An actuator operation check and inspection method, wherein the inspection jig is connected to a connecting portion formed on one side of the output cam to check the operation of the output cam. An operation confirmation inspection method for an actuator according to claim 1,
The connecting portion includes a main hole portion formed at the rotation center of the output cam and a sub hole portion formed at a position displaced from the main hole portion, and the inspection jig includes the main hole portion. A main shaft portion that is fitted to the portion, and a sub shaft portion that is fitted to the sub hole portion, and the inspection jig is attached to the main portion by fitting each shaft portion to each hole portion. An operation check inspection method for an actuator, wherein the operation of the output cam is checked by rotating about a shaft portion. In 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 rotates together with the output gear, and an output cam that is provided in the radial direction of the output shaft,
An actuator characterized in that a connecting portion for connecting an inspection jig is formed on one side of the output cam. The actuator according to claim 3, wherein
The actuator is characterized in that the connecting portion is composed of a main hole portion formed at the rotation center of the output cam and a sub hole portion formed at a position displaced from the main hole portion. The actuator according to claim 4, wherein
The actuator, wherein the output shaft and the output cam are integrally formed of a synthetic resin, and the main hole portion and the sub hole portion form a stealer.

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