JP4053963B2 - Method and apparatus for assembling floating support member - Google Patents

Description

  The present invention relates to a method and an apparatus for assembling a floating support member.

  Generally, a wiper motor mounted on a vehicle is configured by integrally assembling a motor with a speed reduction mechanism, that is, a motor main body and a speed reduction unit that decelerates and outputs the rotation of the motor main body. The motor body is configured such that an armature having a rotating shaft and a commutator is rotatably accommodated in a bottomed cylindrical yoke housing, and the rotating shaft projects into the speed reduction portion. The speed reduction portion includes a speed reduction mechanism that reduces the rotation of the rotary shaft and transmits it to the output shaft in the housing recess in the gear housing, and a plate cover that closes the housing recess is mounted in the opening of the housing recess. Yes.

  A brush holder device that holds a brush for slidingly contacting the commutator and supplying power to the armature is fixed to a portion of the gear housing that faces the opening of the yoke housing. This brush holder device is fixed in a floating state by a vibration-proof rubber (grommet) so that vibrations generated when the brush is in sliding contact are not transmitted to the outside of the holder.

For example, in Patent Document 1, a tubular anti-vibration rubber (cushion rubber in the literature) is fitted into a circular notch provided in the peripheral portion of the holder base constituting the brush holder device, and the anti-vibration rubber fitted therein is fitted. The brush holder device is fixed in a floating state by passing a pin through the shaft hole and press-fitting the pin into a hole provided in the gear case.
Japanese Utility Model Publication No. 6-60277

  By the way, as shown in Patent Document 1, the circular notch portion of the holder base has a narrow opening, and the vibration isolating rubber has a shaft hole for inserting a pin. The narrowed opening is overcome and fitted into the circular notch of the brush holder device from the radial direction. However, when the anti-vibration rubber receives a pressing force from the radial direction of the brush holder device, the anti-vibration rubber is deformed so that the shaft hole of the anti-vibration rubber expands in the narrow direction of the opening, and the anti-vibration rubber is smoothly prevented. The vibration rubber was not assembled to the opening and workability was poor. Further, the vibration-proof rubber is assembled to the holder base without completely overcoming the narrowed opening, which may cause poor assembly, and a sufficient vibration-proof effect may not be obtained.

  The present invention has been made paying attention to such problems existing in the prior art, and can suppress the occurrence of poor assembly when assembling the floating support member, thereby enabling smooth and reliable assembly. An object of the present invention is to provide a method and an apparatus for assembling a floating support member.

In order to achieve the above object, the invention according to claim 1 is to fix the brush holder base, which is in contact with the commutator of the armature and supports the brush for supplying current to the armature, to the housing by the fixing member. An elastically deformable tubular floating support member having a shaft hole through which the fixing member is inserted in a fixing hole provided at the periphery of the brush holder base and having an opening that opens radially outward. In the method of assembling the floating support member, the opening of the brush holder base is provided with a narrow portion for preventing the floating support member from coming off from the opening, and holds the floating support member the formed in the holding part supporting lifting pin is inserted into the shaft hole of said floating support, before the support pins from the opening Wherein by moving the the fixing hole overcoming narrow portion, and summarized in that fitting the said floating support to the fixing hole from the opening.

  According to a second aspect of the present invention, in the first aspect of the present invention, the fixing hole is provided at a position that is point-symmetric with respect to the center of the brush holder base, and the floating support member is connected to each fixing hole. The gist is to fit them simultaneously.

  According to a third aspect of the present invention, in the second aspect of the present invention, the plurality of holding portions are simultaneously moved from the radially outer side of the brush holder base toward the center thereof to fix the floating support members to the respective fixed portions. The gist is that the brush holder base is chucked by the plurality of holding portions via the floating support member by being fitted into the hole.

  According to a fourth aspect of the present invention, when the brush holder base, which is in contact with the commutator of the armature and supports the brush for supplying current to the armature, is fixed to the housing by the fixing member, Assembly of a floating support member for assembling an elastically deformable tubular floating support member having an axial hole through which the fixing member is inserted into a fixing hole provided with an opening opening radially outward In the apparatus, a holding portion that holds the floating support member, a support pin that protrudes from the holding portion and is inserted into the shaft hole of the floating support member, and the support pin that is inserted into the floating support member, The floating support member is fixed from the opening over the narrow portion that prevents the floating support member from coming off from the opening. And a moving means for moving within and summarized in that mounting the floating support member into the fixing hole from the opening.

The gist of a fifth aspect of the present invention is the invention according to the fourth aspect, further comprising advancing / retreating means for advancing / retreating the support pin in an axial direction of the support pin.
According to a sixth aspect of the present invention, in the invention of the fourth or fifth aspect, the fixing hole is provided at a position that is point-symmetric with respect to a center of the brush holder base, and the floating support member is The gist is to simultaneously fit into each fixing hole.
(Function)
According to the first aspect of the present invention, when the floating support member is assembled to the fixed hole, the floating support member is held by the holding portion, and the support formed in the holding portion in the shaft hole formed in the floating support member. The pin is inserted, and the floating support member is mounted in the fixing hole from the opening while the support pin is inserted. Thus, when the floating support member is assembled to the fixed hole, the support pin inserted into the shaft hole becomes a core rod that keeps the shape of the shaft hole constant. For this reason, when the floating support member passes through the narrow portion of the opening together with the support pin inserted into the shaft hole, the fixed hole can easily get over the narrow portion by elastic deformation of the floating support member itself while maintaining the shape of the shaft hole. To the inside. Then, by removing the support pin from the shaft hole, the floating support member can be easily and correctly attached to the fixing hole. Thereby, in the assembling work for assembling the floating support member in the fixing hole of the brush holder base, the occurrence of improper assembly is suppressed, and smooth and reliable assembling can be performed.

  According to invention of Claim 2 or 6, the fixing hole was provided in the position which becomes point-symmetric with respect to the center of a brush holder base, and the floating support member was fitted to each fixing hole simultaneously. For this reason, the force applied to the brush holder base when the floating support member is fitted into each fixing hole acts in a direction that balances with each other.

  According to the third aspect of the present invention, the brush holder base is chucked simultaneously with fitting the floating support member into the brush holder base. Therefore, the chucking operation and the floating support member assembly operation can be performed in one step.

  According to the invention described in claim 4, when the floating support member is assembled to the fixed hole, the floating support member is held by the holding portion, and the support formed in the holding portion in the shaft hole formed in the floating support member. The pin is inserted, the support pin is moved by the moving means, and the floating support member is mounted in the fixing hole from the opening while the support pin is inserted. Thus, when the floating support member is assembled to the fixed hole, the support pin inserted into the shaft hole becomes a core rod that keeps the shape of the shaft hole constant. For this reason, when the floating support member passes through the narrow portion of the opening together with the support pin inserted into the shaft hole, the fixed hole can easily get over the narrow portion by elastic deformation of the floating support member itself while maintaining the shape of the shaft hole. To the inside. Then, by removing the support pin from the shaft hole, the floating support member can be easily and correctly attached to the fixing hole. Thereby, in the assembling work for assembling the floating support member in the fixing hole of the brush holder base, the occurrence of improper assembly is suppressed, and smooth and reliable assembling can be performed. Further, by moving the support pin by the moving means, the floating support member can be accurately fitted at a specified position of the brush holder base.

  According to the fifth aspect of the present invention, the support pin is moved in the axial direction with respect to the brush holder base by the advancing / retreating means. For this reason, a support pin can be easily extracted from the floating support member assembled to the base plate 22.

  According to the present invention, it is possible to suppress the occurrence of assembly failure when the floating support member is assembled, and to perform smooth and reliable assembly.

DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, an embodiment in which the invention is embodied in a wiper motor will be described with reference to the drawings.
A wiper motor 1 shown in FIGS. 1 and 2 is used as a drive source of a vehicle wiper device that wipes raindrops and the like adhering to a windshield glass (front glass) of a vehicle. The wiper motor 1 includes a motor body 2 and a speed reduction unit 3.

  The yoke housing 4 constituting the motor body 2 is made of a conductive metal material and is formed in a substantially bottomed cylindrical shape. A plurality of magnets 5 are fixed to the inner peripheral surface of the yoke housing 4, and an armature 6 is rotatably accommodated inside each magnet 5. A thrust bearing 8 and a first radial bearing 9 that rotatably support the base end portion of the rotary shaft 7 of the armature 6 are provided at the bottom of the yoke housing 4. A gear housing 10 as a housing of the speed reduction unit 3 that covers the distal end side of the rotating shaft 7 on which the worm 7 a is formed is assembled to the opening 4 a of the yoke housing 4 with screws 11.

  The gear housing 10 is made of a metal such as an aluminum alloy, and has an opening recess 10 a having substantially the same shape as the opening 4 a of the yoke housing 4. The gear housing 10 is formed with a gear housing recess 10 b that houses a speed reduction mechanism including the worm 7 a and the worm wheel 12 of the rotating shaft 7. A second radial bearing 13 that rotatably supports an intermediate portion of the rotating shaft 7 is fixed at a predetermined position in the gear housing recess 10b, and a bearing portion 10c that rotatably supports the tip of the rotating shaft 7 is provided. Is formed. A worm 7 a is located between the second radial bearing 13 and the bearing portion 10 c, and the worm 7 a is engaged with the worm wheel 12. The worm wheel 12 is connected to an output shaft 14 arranged in parallel to a direction (perpendicular to the plane of the drawing) perpendicular to the direction of the axis L1 (indicated by the one-dot chain line in FIGS. 1 and 2) of the rotary shaft 7 (wiper motor 1). Has been.

  Further, as shown in FIG. 2, a plate cover 15 that closes the gear housing recess 10b is attached to the gear housing 10. The plate cover 15 is integrally provided with a power feeding connector 16 that is connected to a vehicle body side connector (not shown) extending from the vehicle body side and receives a drive power supply from the vehicle body side. When the drive power is supplied from the power supply connector 16, the rotation shaft 7 of the motor body 2 is rotationally driven, and the rotation of the rotation shaft 7 (worm 7 a) is decelerated and transmitted to the output shaft 14. A wiper arm (not shown) is drivingly connected to the output shaft 14 via a link mechanism (not shown) of a vehicle wiper device. When the output shaft 14 rotates, the wiper arm performs a predetermined wiping operation. It has become.

  As shown in FIG. 3, a brush holder device 21 is assembled in the opening recess 10 a of the gear housing 10 facing the yoke housing 4. The brush holder device 21 includes a substantially annular base plate 22 as a brush holder base. The base plate 22 is formed of a thermosetting resin having an insulating property such as a phenol resin. A rotating shaft 7 and a commutator 6 a fixed to the rotating shaft 7 are inserted through the center portion of the base plate 22.

  On one side surface (surface on the side of the yoke housing 4) 22a of the base plate 22, three brush holders (first to third brush holders) 25a to 25c having a substantially rectangular tube shape have a predetermined angle in the circumferential direction of the base plate 22 It is fixed with an interval. The first brush holder 25a and the second brush holder 25b are arranged at positions facing each other with the rotation shaft 7 interposed therebetween, and the third brush holder 25c is shifted from the second brush holder 25b by a predetermined angle in the circumferential direction of the base plate 22. Is arranged. The brush holders 25a to 25c accommodate and hold a substantially square columnar common brush 26a, a low-speed driving brush 26b, and a high-speed driving brush 26c that are slidably held toward the commutator 6a. Has been. In addition, mounting pins 22c project from the positions near the brush holders 25a to 25c on one side surface 22a of the base plate 22, respectively. Each mounting pin 22c is provided with a torsion spring 27 for urging each brush 26a to 26c toward the commutator 6a.

  The base plate 22 (brush holder device 21) is provided with two fixing screws (first screws) to the gear housing 10 via a circular floating support member 23 made of vibration-proof rubber (elastic material) mounted at two predetermined locations. The first fixing screw 24a and the second fixing screw 24b) are used for fixing. The base plate 22 is provided with a circuit breaker 28 for circuit protection in the vicinity of the first brush holder 25a in which the common brush 26a is accommodated. The circuit breaker 28 is connected to a pigtail 26 d extending from the common brush 26 a via a terminal plate 29 a whose one connection terminal is fixed to the base plate 22, and the other connection terminal is fixed to the base plate 22. It is connected to the second fixing screw 24b through 29b and is grounded.

Next, the configuration of the brush holder device 21 (base plate 22) and how the brush holder device 21 is fixed to the gear housing 10 will be described in detail.
As shown in FIG. 4, the base plate 22 is formed with a circular notch 30 as a pair of fixing holes at a point-symmetrical position about the center position of the base plate 22 (that is, the axis L1 of the rotating shaft 7). . The pair of circular notches 30 are formed with openings 30a that open from the center position of the base plate 22 (the position of the axis L1) toward the outer peripheral edge. The openings 30a are attached to the floating support member 23. It is formed to be narrower than the diameter R of the portion 23d. Therefore, in the present embodiment, the opening 30 a is provided with a narrow portion 30 b that prevents the floating support member 23 from coming off in the radial direction of the base plate 22.

  A circular floating support member 23 made of vibration-proof rubber is fitted along the radial direction of the base plate 22 from the opening 30 a of the circular notch 30. As shown in FIG. 5, a pair of annular convex portions 23 a and 23 b formed so as to protrude radially outward is provided on the side surface of the floating support member 23 in the axial direction of the mounting portion 23 d of the floating support member 23. (That is, it is provided at both ends). When the floating support member 23 is fitted and attached to the circular notch 30 of the base plate 22, the pair of annular protrusions 23 a and 23 b formed at both ends sandwich the peripheral portion of the circular notch 30 of the base plate 22. The base plate 22 is fixed so that the floating support member 23 cannot move in the direction of the axis L1.

  The floating support member 23 is formed with an axial hole 23c that penetrates along the direction of the axis L2 parallel to the axis L1 when the floating support member 23 is attached to the base plate 22. Then, fixing screws 24 a and 24 b as fixing members for fixing (supporting) the base plate 22 to the gear housing 10 are inserted into the shaft holes 23 c. The fixing screws 24a and 24b are inserted into the shaft holes 23c of the floating support member 23 and then screwed into screw holes 31 formed at predetermined positions of the opening recess 10a of the gear housing 10 shown in FIG. It has become. Further, at the ends of the fixing screws 24a and 24b on the side not screwed into the screw hole 31, a retaining portion 32 is formed to project outward in the radial direction of the fixing screws 24a and 24b (see FIG. 3).

  The retaining portion 32 is formed to be at least larger than the diameter of the shaft hole 23 c in order to engage with the end portion of the floating support member 23. The terminal plate 29b is formed with a notch 29c so as not to interfere with the second fixing screw 24b when the second fixing screw 24b is inserted into the shaft hole 23c of the floating support member 23 (FIG. 4). An opening 29d is formed in the notch 29c, and the opening 29d is formed to open toward the outer peripheral edge of the base plate 22 when the terminal plate 29b is attached to the base plate 22. . That is, the opening 29d of the notch 29c is configured to open radially outward with the center position (position of the axis L1) of the base plate 22 as the center when the terminal plate 29b is attached to the base plate 22. The retaining portion 32 contacts the terminal plate 29b when the second fixing screw 24b is screwed into the screw hole 31, and one connection terminal of the circuit breaker 28 connects the terminal plate 29b and the second fixing screw 24b. Via the gear housing 10.

  When these floating support members 23 are assembled to the base plate 22, they are assembled by an assembling apparatus 33 as shown in FIGS. Hereinafter, a configuration of the assembling apparatus 33 and a method by which the assembling apparatus 33 assembles the floating support member 23 to the base plate 22 will be described. 8 is a schematic side view of the assembling apparatus 33. For convenience of drawing, the clamping parts 34a and 34b to be shown on the front side of the paper and the terminal plate 29b attached to the base plate 22 are shown. Omitted.

  First, the configuration of the assembling apparatus 33 will be described. The assembling device 33 includes arc-shaped holding portions 34 a and 34 b that hold the base plate 22, a holding portion 35 that holds the floating support member 23, and a parallel movement that moves the holding portion 35 in the horizontal direction with respect to the base plate 22. A hydraulic cylinder 36 and a lifting hydraulic cylinder 37 that lifts and lowers the holding portion 35 in a direction perpendicular to the base plate 22 are provided. In the present embodiment, the assembling device 33 has two holding portions 35 corresponding to the number of floating support members 23 (that is, the number of circular notches 30 provided in the base plate 22). . In this embodiment, the parallel movement hydraulic cylinder 36 serves as a moving means, and the lifting hydraulic cylinder 37 serves as an advance / retreat means.

  Next, a method for assembling the floating support member 23 to the base plate 22 by the assembling apparatus 33 will be described. As shown in FIG. 7, the assembling device 33 first presses the base plate 22 by pressing the arc-shaped holding portion 34 a against the outer peripheral edge of the base plate 22 and simultaneously pressing the holding portion 34 b against the inner peripheral edge of the base plate 22. It is clamped (in FIG. 7, the white arrow indicates the clamping direction (pressing direction)), and the base plate 22 is restricted from moving in the horizontal direction. Incidentally, the clamping parts 34a and 34b clamp the base plate 22 so as not to block the opening 30a of the circular notch 30.

  Next, as shown in FIG. 8, the assembling apparatus 33 inserts the shaft hole 23 c of the floating support member 23 into the support pin 38 that protrudes from the holding portion 35, and the flange portion that protrudes from the holding portion 35. 39, the end of the floating support member 23 is locked, and the floating support member 23 is held by the holding portion 35. The holding portion 35 is disposed along the opening direction of the opening 30a of the circular notch 30 when the base plate 22 is held between the holding portions 34a and 34b. That is, the holding part 35 is disposed so as to face the opening 30a of the circular notch 30 when the base plate 22 is held between the holding parts 34a and 34b. Incidentally, a pair of holding | maintenance part 35 in this embodiment is arrange | positioned on the straight line orthogonal to the center position (position of the axis line L1) of the baseplate 22. FIG. The holding portion 35 is disposed at a position spaced from the outer peripheral edge of the base plate 22 by a predetermined distance so that the floating support member 23 does not contact the base plate 22 at least when the floating support member 23 is held. Further, when the flange portion 39 of the holding portion 35 and the end portion of the floating support member 23 are locked, the support pin 38 is formed so as to protrude from the floating support member 23.

  The parallel movement hydraulic cylinder 36 moves the support pins 38 of the pair of holding portions 35 along the radial direction of the base plate 22 together with the floating support member 23 into the circular cutout portion 30 (in FIG. 7 and FIG. The moving direction is indicated by a chain line arrow), and the mounting portion 23d of the floating support member 23 is fitted into the circular cutout 30 from the opening 30a.

  When passing through the opening 30a in which the narrow portion 30b is provided, the floating support member 23 is forced to elastically deform because the diameter R of the mounting portion 23d is larger than the interval between the narrow portions 30b. However, since the support pin 38 is inserted into the shaft hole 23c so that the support pin 38 becomes a core rod that keeps the shape of the shaft hole 23c constant, the shape of the shaft hole 23c does not change and the floating support member 23 itself Passes through the narrow portion 30b of the opening 30a due to the elastic deformation. Further, since the support pin 38 has such a length that it protrudes from the end of the floating support member 23 when inserted into the shaft hole 23c, the shape of the shaft hole 23c is reliably maintained constant. . Further, the assembling device 33 adjusts the moving speed of the holding portion 35 with the parallel movement hydraulic cylinder 36 so that the floating support member 23 is fitted into the circular cutout portion 30 at the same time. Since the circular notch 30 is arranged so as to be point-symmetric with respect to the center position of the base plate 22 and the opening 30a is opened radially outward from the center position, the floating support member 23 Are simultaneously fitted, the pressing forces applied to the base plate 22 act in a direction in which they are balanced with each other. That is, when the floating support member 23 is fitted to the base plate 22, the base plate 22 can be stably held and fixed.

  Then, after the floating support member 23 is fitted into the circular cutout 30, the support pin 38 is moved vertically with respect to the base plate 22 (in the direction of the axis L <b> 1) by the lifting / lowering hydraulic cylinder 37 provided at the lower part of the assembling apparatus 33. (In FIG. 8, the moving direction is indicated by a solid arrow), and the support pin 38 is removed from the floating support member 23. At this time, since the floating support member 23 has already passed through the opening 30a provided with the narrow portion 30b, the outer peripheral surface is not pressed and elastically deformed, and the support pin 38 serving as a core rod is removed. Even if this is done, the shape of the shaft hole 23c remains constant. Further, the narrow support portion prevents the floating support member 23 from coming out radially outward of the base plate 22. Thereafter, the assembling device 33 releases the holding of the base plate 22 by the holding portions 34a and 34b. Thereby, the base plate 22 (brush holder device 21) to which the floating support member 23 in which the shape of the shaft hole 23c is kept constant can be obtained.

  Incidentally, after that, the base plate 22 fitted with the floating support member 23 is arranged at a predetermined position of the opening recess 10a of the gear housing 10, and the fixing screws 24a and 24b are inserted into the shaft hole 23c to be formed in the opening recess 10a. The base plate 22 is supported in a floating state with respect to the gear housing 10 by being screwed into the screw holes 31. Accordingly, the brush holder device 21 is fixed to the gear housing 10 via the floating support member 23 by the fixing screws 24a and 24b. That is, the brush holder device 21 is fixed to the gear housing 10 with the fixing screws 24a and 24b so that vibration generated in the brush holder device 21 by the floating support member 23 is suppressed from being transmitted to the gear housing 10 side.

As described above in detail, the present embodiment has the following features.
(1) When the floating support member 23 is assembled to the circular cutout portion 30, the floating support member 23 is held by the holding portion 35 and the support formed in the holding portion 35 in the shaft hole 23 c formed in the floating support member 23. The pin 38 is inserted, and the floating support member 23 is attached to the circular notch 30 from the opening 30a with the support pin 38 inserted. Thereby, when the floating support member 23 is assembled to the circular notch 30, the support pin 38 inserted through the shaft hole 23c serves as a core rod that keeps the shape of the shaft hole 23c constant. For this reason, when the floating support member 23 passes through the narrow portion 30b of the opening 30a together with the support pin 38 inserted into the shaft hole 23c, the narrow portion is caused by elastic deformation of the floating support member 23 itself while the shape of the shaft hole 23c is maintained. It easily gets over 30b and reaches the circular cutout 30. Then, by removing the support pin 38 from the shaft hole 23c, the floating support member 23 can be easily and correctly attached to the circular cutout 30. Thereby, in the assembling work for assembling the floating support member 23 to the circular notch 30 of the base plate 22, the occurrence of improper assembly is suppressed, and smooth and reliable assembling can be performed.

  (2) One circular cutout 30 is formed at a position that is point-symmetric about the center position of the other circular cutout 30 and the base plate 22 (position of the axis L1), and the opening 30a is , And open radially outward from the center position. For this reason, when the floating support member 23 is mounted, the floating support member 23 is simultaneously fitted from the opening 30a of each circular notch 30, so that it is narrower than the diameter R of the mounting portion 23d of the floating support member 23. The forces applied to the base plate 22 when getting over the opening 30a thus acted in a direction that balances with each other. Therefore, by fitting the floating support member 23 to the base plate 22, the base plate 22 does not move and can be stably fixed and held, the brush holder device 21 can be easily assembled to the gear housing 10, and improper assembly is suppressed. can do.

  (3) Since the support pin 38 is inserted into the shaft hole 23c when the floating support member 23 is fitted to the base plate 22, the support pin 38 is moved by the parallel movement hydraulic cylinder 36, thereby floating support. The member 23 can be accurately fitted at a specified position of the base plate 22.

  (4) The support pin 38 is moved downward with respect to the base plate 22 with respect to the base plate 22 by the lifting hydraulic cylinder 37. For this reason, the support pin 38 can be easily extracted from the floating support member 23 engaged so as to sandwich the base plate 22 by the annular protrusions 23a and 23b.

  (5) When the support pin 38 is inserted into the shaft hole 23 c of the floating support member 23, the support pin 38 is formed so as to protrude from the end of the floating support member 23. For this reason, when assembling the floating support member 23 to the base plate 22, the gap due to the shaft hole 23 c can be eliminated by inserting the support pin 38 into the shaft hole 23 c, and the distortion of the shaft hole 23 c can be reliably eliminated. For this reason, it is possible to easily insert the fixing screws 24a and 24b after removing the support pin 38, and it is easy to assemble the brush holder device 21 to the gear housing 10, and to reliably suppress the assembly failure. it can.

  (6) A notch 29c that opens along the direction in which the circular notch 30 opens is formed in the terminal plate 29b. For this reason, even if the support pin 38 is formed so as to protrude from the end of the floating support member 23, the terminal plate 29 b and the support pin 38 do not interfere with each other, and the radial direction of the base plate 22 Easy assembly from the outside. Further, since the base plate 22 can be assembled from the outside in the radial direction, it is not necessary to determine the assembly order of the floating support member 23 and the terminal plate 29b, and the assembly is facilitated.

  (7) By holding the floating support member 23 by the holding portion 35, positioning with respect to the base plate 22 can be facilitated in the direction of the axis L1, and the floating support member 23 can be securely fitted.

In addition, the said embodiment can be embodied in another embodiment (another example) as follows.
In the above embodiment, the floating support member 23 has a circular tubular shape (cylindrical shape), but is not limited to this shape. For example, the floating support member 23 has a tubular shape having a shaft hole 23c, such as a rectangular tubular shape or an elliptical tubular shape. Good. Further, the shape of the shaft hole 23c is not limited to a circular cross section, and may be a square cross section. Further, the shape of the support pin 38 of the holding portion 35 is not limited, and may be a prism. The shape of the support pin 38 preferably corresponds to the shape of the shaft hole 23c. However, since the floating support member 23 can be elastically deformed, it does not necessarily correspond to the shape of the shaft hole 23c.

  In the above embodiment, the notch 29c that opens toward the outer peripheral edge of the base plate 22 is formed in the terminal plate 29b. However, a hole into which the second fixing screw 24b is inserted is formed and floated before the terminal plate 29b is assembled. If the support member 23 is assembled, it may not be opened.

In the above embodiment, the base plate 22 is formed in an annular shape, but may be freely changed such as a polygonal shape.
In the above embodiment, the base plate 22 may be chucked simultaneously with the pair of floating support members 23 fitted into the base plate 22 by the pair of holding portions 35. The chuck in the present embodiment means that the base plate 22 is fixed and held by a plurality of claw portions (in the present embodiment, the holding portion 35) so as to be sent to the next assembly process. In this way, the chucking operation and the assembly operation of the floating support member 23 can be performed in one step, and the assembly efficiency can be improved.

In the above embodiment, the number of the circular cutout portions 30 of the base plate 22 is two, but may be arbitrarily changed. For example, four may be sufficient.
In the above embodiment, the circular notch 30 is formed at a point-symmetrical position around the center position of any of the circular notch 30 and the base plate 22, but is formed at a point-symmetrical position. It is not necessary. For example, the circular cutout 30 may be formed at a position rotated by the same angle. For example, when three circular notches 30 are received, the circular notches 30 may be formed at positions rotated by 120 degrees. When a plurality of circular cutouts 30 are arranged in this manner, if the floating support member 23 is simultaneously fitted in each circular cutout 30, the force applied to the base plate 22 acts so as to be balanced. For this reason, when the floating support member 23 is fitted, the base plate 22 can be stably fixed and held.

  In the above embodiment, the parallel movement hydraulic cylinder 36 is employed as the moving means. However, the movement cylinder may not be a hydraulic cylinder, and may be, for example, an air cylinder or a motor actuator. Similarly, the elevating hydraulic cylinder 37 is employed as the advancing / retreating means, but it may not be a hydraulic cylinder.

  In the above embodiment, the support pin 38 is formed on the holding portion 35 and the holding portion 35 and the support pin 38 are moved integrally. However, the holding portion 35 and the support pin 38 are formed separately, and only the support pin 38 is formed. May be moved.

  In the above embodiment, the floating support members 23 are fitted into the pair of circular notches 30 at the same time. However, the floating support members 23 may be fitted one by one. This is illustrated according to FIG. In FIG. 9, illustration of the assembling device, the brush holder device 21 and the like is omitted. Moreover, the description regarding each member structure common to the said embodiment attaches | subjects the same code | symbol, and abbreviate | omits the overlapping description.

  As shown in FIG. 9A, when the base plate 22 is conveyed and fixed and held at a predetermined position, the floating support member 23 is supplied from the parts feeder 40 to the holding unit 35. And the support pin 38 is inserted in the shaft hole 23c, and the floating support member 23 is hold | maintained. In the present embodiment, the parts feeder 40 is a workpiece alignment and supply device that aligns individual parts (work, in this embodiment, the floating support member 23) in a certain direction and posture so that the assembly apparatus can handle them. This is a kind of vibratory feeder. And the holding | maintenance part 35 holding the floating support member 23 moves toward the base plate 22, and makes the floating support member 23 fit in one circular notch 30 (refer FIG.9 (b)). When the floating support member 23 is fitted, the base plate 22 is rotated by a certain angle (180 degrees in this embodiment), and the opening 30a of the circular notch 30 to which the floating support member 23 is not yet fitted is held. It arrange | positions so that the part 35 may be opposed (refer FIG.9 (c)). On the other hand, the holding unit 35 is supplied with the floating support member 23 in the same manner as described above from the parts feeder. And the support pin 38 is inserted in the shaft hole 23c, and the floating support member 23 is hold | maintained. Similarly, the holding portion 35 holding the floating support member 23 moves toward the base plate 22 and fits the floating support member 23 into one circular cutout portion 30 (see FIG. 9D).

Sectional drawing of the wiper motor of this embodiment. The external view seen from the bottom face side of the wiper motor. AA sectional view taken on the line AA of FIG. The top view for demonstrating the circular notch part formed in the baseplate. The sectional side view of a floating support member. The top view which shows the opening recessed part of the gear housing seen from the yoke housing side. The schematic plan view which shows the base plate clamped by the clamping part of the assembly | attachment apparatus, and the floating support member hold | maintained at the holding | maintenance part. The schematic side view for demonstrating an assembly | attachment apparatus. (A)-(d) is a schematic diagram for demonstrating another example of the assembly method of a floating support member.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 ... Wiper motor, 2 ... Motor main body, 6 ... Armature, 6a ... Commutator, 7 ... Rotating shaft, 7a ... Worm which comprises a reduction mechanism, 10 ... Gear housing, 10b ... Gear accommodating part, 12 ... Constructing a reduction mechanism Worm wheel, 14 ... output shaft, 15 ... plate cover, 16 ... power feeding connector, 21 ... brush holder device, 22 ... base plate, 23 ... floating support member, 23c ... shaft hole, 30 ... circular notch, 30a ... circular Opening part of the notch part, 30b ... narrow part of the deductive notch part, 33 ... assembling device, 35 ... holding part, 36 ... hydraulic cylinder for horizontal movement, 37 ... hydraulic cylinder for lifting and lowering, 38 ... support pin.

Claims (6)

In fixing the brush holder base, which is in contact with the commutator of the armature, and which supports the brush for supplying current to the armature, to the housing by the fixing member, the outer periphery of the brush holder base is provided radially outward. In the assembling method of the floating support member in which the elastically deformable tubular floating support member having the shaft hole through which the fixing member is inserted is assembled into the fixing hole in which the opening to be opened is formed.
The opening of the brush holder base is provided with a narrow portion for preventing the floating support member from coming off from the opening,
The supporting lifting pin formed on the holding portion for holding the floating support member is inserted into the shaft hole of the floating support,
A method for assembling the floating support member, wherein the support pin is moved from the opening portion over the narrow portion into the fixing hole, and the floating supporting member is attached to the fixing hole from the opening portion. . The fixing hole is provided at a position that is point-symmetric with respect to the center of the brush holder base,
The method of assembling a floating support member according to claim 1, wherein the floating support member is fitted into each of the fixing holes simultaneously.   The plurality of holding portions are simultaneously moved from the radially outer side of the brush holder base toward the center thereof, and the floating support members are fitted into the respective fixing holes, so that the floating support members are fitted by the plurality of holding portions. The method of assembling the floating support member according to claim 2, wherein the brush holder base is chucked through a gap. In fixing the brush holder base, which is in contact with the commutator of the armature, and which supports the brush for supplying current to the armature, to the housing by the fixing member, the outer periphery of the brush holder base is provided radially outward. In a floating support member assembling apparatus for assembling an elastically deformable tubular floating support member having an axial hole through which the fixing member is inserted into a fixing hole in which an opening to be opened is formed.
A holding portion for holding the floating support member;
A support pin that protrudes from the holding portion and is inserted into the shaft hole of the floating support member;
Moving means for moving the support pin inserted into the floating support member over the narrow portion that prevents the floating support member from coming off from the opening, and moving from the opening into the fixed hole;
An assembly apparatus for a floating support member, wherein the floating support member is attached to the fixing hole from the opening.   The floating support member assembling apparatus according to claim 4, further comprising advance / retreat means for advancing / retreating the support pin in an axial direction of the support pin. The fixing hole is provided at a position that is point-symmetric with respect to the center of the brush holder base,
The floating support member assembling apparatus according to claim 4 or 5, wherein the floating support member is fitted into each of the fixing holes at the same time.

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