JP2007181302A - Motor device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a motor device to which a worm wheel having, on its rear surface, a conductive part slidably contacted with a contact point for operating a motor body can be applied without making sliding grease discharged on the rear surface of the worm wheel, and also without causing the deterioration of the assembling workability of the motor device. <P>SOLUTION: A cross sectional shape between a bottomed connecting hole 19c of the worm wheel 19 and a first pin 20b of a sector gear 20 is formed into a deformed shape that allows the first pin 20b to rotate by internally contacting with the connecting hole 19c by forming a groove 19d in the connecting hole 19c. Since the connecting hole 19c can rotatably support the first pin 20b and a gap extending in the axial direction can be formed between the connecting hole and the first pin, the surplus sliding grease G injected into the connecting hole 19c can be released via the groove 19d, and can be prevented from being jumped out to the opposite side of the worm wheel 19, that is, a cam plate side. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a motor device having a rotating body rotated by a drive shaft of a motor body, and more particularly to a motor device suitable for use in driving a wiper of a vehicle such as an automobile.

  2. Description of the Related Art Conventionally, in a motor device, a motor such as a worm, a worm wheel, a link mechanism, or the like is used to decelerate the rotational motion of a motor body having a drive shaft to obtain a large torque or to swing a driven object. What drives a transmission member is known. Among such various motor devices, there is a wiper motor as one that drives a driven object by converting the rotational motion of the motor body into a swing motion. This wiper motor swings a wiper arm mounted with a wiper blade within a predetermined range on the windshield and rear glass in order to wipe off dust and raindrops attached to the windshield and rear windshield of a vehicle such as an automobile. I have to.

As such a wiper motor, for example, the one disclosed in Patent Document 1 is disclosed, and this wiper motor is provided with a worm wheel that meshes with a worm provided on a drive shaft of a motor body and decelerates the rotational speed of the worm. ing. A connection hole for rotatably mounting a support shaft (pin) provided on one end side of the sector gear is provided at a position spaced from the rotation shaft of the worm wheel. An output shaft to which one end of the wiper is connected is provided at the other end of the sector gear, and the output shaft swings by the swinging motion of the sector gear, whereby the wiper swings. .
JP 2005-155903 A

  Incidentally, sliding grease is usually applied to the meshing part of the worm and the worm wheel constituting the motor device and the sliding part of the power transmission member to reduce the contact resistance between the members, that is, the frictional resistance. To efficiently transmit the rotational force of the motor body.

  Also in the wiper motor disclosed in Patent Document 1 described above, for example, a predetermined amount of sliding grease is injected into a connecting hole provided in a worm wheel constituting the wiper motor, and a sector gear is injected into the connecting hole into which the sliding grease is injected. Are attached to reduce the mutual frictional resistance. A through hole is formed in the bottom of the connection hole so as to penetrate the back surface of the worm wheel. When the support shaft is attached to the connection hole, the air inside the connection hole is passed through the through hole. It is discharged to the back surface, so that both can be in close contact with each other.

  However, in the wiper motor disclosed in Patent Document 1 described above, sliding grease can be spread over the entire contact portion between the coupling hole and the support shaft. However, excess sliding grease can pass through the through-hole. Jumps out on the back of the. Therefore, it is difficult to apply the worm wheel disclosed in Patent Document 1 to the wiper motor provided with the conductive portion (cam plate) on which the contact for operating the motor body is slidably contacted on the back surface of the worm wheel for the following reason. It was. That is, contact grease is applied to the surface of the conductive portion in order to prevent contact failure and electrical leakage, and the contact grease and sliding grease are mixed to cause problems such as conduction failure. There is. There is also a wiper motor with a microcomputer control that controls the wiper motor by detecting a minute current between the contact and the conductive part, but if there is a large amount of sliding grease protruding from the through hole to the back of the worm wheel, the contact and conductive part There is also a possibility that a small amount of current cannot be detected because sliding grease is interposed between them. Therefore, it is conceivable to accurately control the injection position and the injection amount of the sliding grease to be injected into the connection hole. However, in this case, there is a concern that the assembly workability of the motor device is deteriorated.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to prevent sliding grease from being discharged to the back surface of the worm wheel, and to reduce the motor on the back surface without deteriorating the assembling workability of the motor device. An object of the present invention is to provide a motor device capable of applying a worm wheel provided with a conductive portion with which a contact for operating a main body is slidably contacted.

  The motor device of the present invention is a motor device having a rotating body that is rotated by a drive shaft of a motor body, and the rotating body is provided with a bottomed connecting hole that is provided apart from the rotation center of the rotating body, A power transmission member having one side rotatably attached to the connection hole via a pin and the other side connected to a driven object, and having a cross-sectional shape of the connection hole and the pin in the connection hole. It is characterized by a deformed shape in which the pin can be inscribed and rotated.

  In the motor device according to the present invention, the connecting hole and the pin are each formed in a columnar shape, and at least one of the connecting hole and the pin is a groove extending in the axial direction to form a gap with a mounting partner. Is formed.

  The motor device of the present invention is a motor device having a rotating body that is rotated by a drive shaft of a motor body, and the rotating body is provided with a bottomed connecting hole that is provided apart from the rotation center of the rotating body, Provided on the back of the connecting hole of the rotating body, a conductive portion that contacts a contact for operating the motor body, and one side is rotatably attached to the connecting hole via a pin, and the other side is a driven object And a power transmission member connected to the rotating body, wherein the rotating body is formed with a radial hole extending in a radial direction from the bottom side of the connecting hole toward the outer peripheral wall surface of the rotating body.

  In the motor device of the present invention, the drive shaft is a worm, the rotating body is a worm wheel that is decelerated by the worm, and the power transmission member converts the rotational motion of the worm wheel into a swing motion. It is a member.

  The motor device of the present invention includes an output shaft that can be rotated by the swing motion conversion member, and a wiper arm is attached to the output shaft.

  According to the present invention, since the cross-sectional shape of the bottomed connecting hole in the rotating body and the pin of the power transmission member is an irregular shape that can rotate with the pin inscribed in the connecting hole, the connecting hole can rotate the pin. A gap extending in the axial direction can be formed between the two. Therefore, the excess sliding grease injected into the connection hole can be escaped through the gap, and it does not jump out to the opposite side of the rotating body.

  According to the present invention, the connecting hole and the pin are each formed in a cylindrical shape, and at least one of the connecting hole and the pin is formed with an axially penetrating groove that forms a gap with the mounting partner. As a result, the excess sliding grease can be released by the groove portion, and there is no possibility of jumping out to the opposite side of the rotating body.

  According to the present invention, a conductive portion is provided on the back of the bottomed connecting hole in the rotating body to which the contact for operating the motor body slides, and extends in the radial direction from the bottom side of the connecting hole toward the outer peripheral wall surface of the rotating body. Since the radial hole is formed, the excess sliding grease injected into the connecting hole can be released through the radial hole, and does not jump out to the opposite side of the rotating body.

  According to the present invention, the drive shaft can be a worm, the rotating body can be a worm wheel decelerated by the worm, and the power transmission member can be a swing motion conversion member that converts the rotational motion of the worm wheel into a swing motion. It is also possible to provide an output shaft that can be rotated by a swing motion conversion member, and to attach a wiper arm to the output shaft.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  FIG. 1 is a front view showing a motor device according to a first embodiment of the present invention. This motor device 10 is used in a rear wiper device for wiping rear glass in a vehicle such as an automobile (not shown). The motor device 10 includes an electric motor unit 11 and a gear unit unit 12 as a motor body.

  The electric motor unit 11 includes a motor case 13 that forms the outer shell thereof, and two magnets (not shown) arranged on the inner peripheral surface of the motor case 13 with different magnetic poles facing each other. With these magnets, a magnetic field is formed inside the motor case 13. In addition, an armature (not shown) is provided inside the motor case 13 so as to be located in this magnetic field, and this armature has a bearing (not shown) in which the drive shaft 14 is provided at the bottom of the motor case 13. It is free to rotate by being supported by. An amateur core (not shown) in which a plurality of slots are formed is provided on the amateur, and a plurality of amateur coils (not shown) are formed by winding copper wires around these slots. Further, a commutator (not shown) is attached to the drive shaft 14 adjacent to the amateur core, and a plurality of commutator pieces (not shown) arranged radially on the outer periphery of the commutator in a state of being insulated from each other. ) Is connected to each amateur coil. The drive shaft 14 protrudes from the motor case 13 and rotates at a predetermined rotation speed according to the current supplied to the electric motor unit 11. A worm gear (worm) 15 having a helical tooth portion 15a (not shown in detail) formed on the outer periphery is integrally mounted on the projecting end side (right end side in the drawing) of the drive shaft 14.

  The gear unit 12 includes a bottomed gear case 16 formed in a bathtub shape, and a gear mechanism 18 provided in the gear case 16. The gear mechanism 18 includes a worm wheel 19, a sector gear 20, and an output shaft 21. , Connecting plate 22 and cover 23. On the back side of the gear case 16, that is, on the back side of the bottom of the gear case 16 in FIG. 1, a wiring or the like (not shown) to the electric motor unit 11 is accommodated, and a connector to which a power source, a controller connector, etc., not shown is connected. Part 17 is mounted.

  2 is an exploded perspective view showing the gear mechanism 18 in the motor apparatus 10 shown in FIG. 1. A worm wheel 19 as a rotating body is a spur gear and is mounted on the outer peripheral wall of the drive shaft 14 on the protruding end side. A tooth portion 19a (not shown in detail) that meshes with the tooth portion 15a of the worm gear 15 is formed. The worm wheel 19 is decelerated and rotated by the rotation of the drive shaft 14 by the electric motor unit 11. Therefore, the worm gear 15 and the worm wheel 19 constitute a speed reduction mechanism. A bottomed connecting hole 19c is formed at a position offset by a predetermined amount in the radial direction from the rotation shaft 19b, which is the rotation center of the worm wheel 19, that is, at a position separated from the rotation shaft 19b.

  FIG. 3 is a plan view showing the worm wheel 19 shown in FIG. 2 alone, and FIG. 4 is a cross-sectional view taken along the line AA of FIG. As shown in FIGS. 3 and 4, a groove portion 19d having a substantially semicircular cross section extending to the bottom surface of the connection hole 19c is formed on the inner periphery of the connection hole 19c. The groove portion 19d is formed so as to be positioned at the radially outermost position of the worm wheel 19 with respect to the connecting hole 19c and to bulge outward with respect to the radial direction of the connecting hole 19c. However, the cross-sectional shape of the groove portion 19d is not limited to a semicircular shape, and may be a polygonal shape such as a rectangular shape or a triangular shape.

  As shown in FIG. 2, the sector gear 20 (power transmission member, oscillating motion converting member) constituting the gear mechanism 18 functions as a link, and includes a substantially fan-shaped spur gear 20a. A first pin 20b is fixedly provided on one end side (one side) of the sector gear 20, and the first pin 20b is rotatably mounted in a connection hole 19c provided in the worm wheel 19. A second pin 20c serving as a rotation shaft of the spur gear 20a is fixedly provided on the other side of the sector gear 20. Here, the outer peripheral surface of the first pin 20b has a circular cross section that is in slidable contact with (inscribed in) the inner peripheral surface of the connection hole 19c, whereby the cross section of the connection hole 19c and the first pin 20b. The shapes are different from each other, and a gap extending in the axial direction is formed between the two by the groove 19d.

  The spur gear 20a provided on the other side of the sector gear 20 meshes with a spur gear 21a that is integrally fixed to one end portion (upper end side in FIG. 2) of the output shaft 21 constituting the gear mechanism 18. Yes. The other end portion (lower end side in FIG. 2) of the output shaft 21 extends to the outside through a through hole 16a (see FIG. 6) provided in the bottom portion of the gear case 16, and the tip end side has a driven object. The end of a wiper arm (not shown) to which a wiper blade as an object is attached is connected. As a result, the other side of the sector gear 20 as the power transmission member, that is, the spur gear 20 a is connected to the wiper arm as the driven object via the output shaft 21.

  A connecting plate 22 constituting the gear mechanism 18 is provided between the sector gear 20 and the output shaft 21, and a first through hole 22a and a second through hole 22b are formed in the connecting plate 22. Yes. The second pin 20c of the sector gear 20 is rotatably connected to the first through hole 22a, while the output shaft 21 is rotatably connected to the second through hole 22b. The center-to-center distance between the first through hole 22a and the second through hole 22b is set to the sum of the pitch circle radius of the spur gear 20a in the sector gear 20 and the pitch circle radius of the spur gear 21a in the output shaft 21. As a result, the distance between the sector gear 20 and the output shaft 21 can be maintained while maintaining a constant distance.

  A cover 23 whose outer shape is substantially similar to the outer shape of the sector gear 20 is mounted above the sector gear 20 in FIG. The cover 23 is formed of a resin such as plastic. A first cap portion 23a and a second cap portion 23b are integrally formed on the cover 23. The first cap portion 23a is formed on the first pin 20b of the sector gear 20, and the second cap portion 23b is formed on the first portion of the sector gear 20. The two pins 20c are respectively fitted. A claw portion 23c extending downward in FIG. 2 is integrally formed on the cover 23, and the cover 23 can be attached to the connecting plate 22 with one touch by sandwiching the sector gear 20 by the claw portion 23c. ing. The tops (upper end side in FIG. 2) of the first cap part 23a and the second cap part 23b of the cover 23 are opposed to the bottom part of the gear case 16 so as to cover the gear case 16 (not shown). Slidable contact with no resistance.

  As the worm wheel 19 rotates, the first pin 20b of the sector gear 20 rotates around the rotation shaft 19b of the worm wheel 19. At this time, the second pin 20c of the sector gear 20 (the rotation shaft of the spur gear 20a). ) Is restricted by the output shaft 21 via the connecting plate 22, and thus swings within the gear case 16 with the output shaft 21 as a rotation shaft. Accordingly, the rotational motion of the worm wheel 19 is converted into a swing motion by the sector gear 20, and as a result, the output shaft 21 can swing within a predetermined rotation angle range (within the wiper blade wiping range). .

  FIG. 5 is a bottom view showing the worm wheel 19 shown in FIG. 3 alone. As shown in FIG. 5, a cam plate 24 is mounted on the surface (back) of the worm wheel 19 opposite to the connection hole 19 c. The cam plate 24 is electrically connected to the contact portions 25a, 25b, and 25c (see FIG. 6) for slidably contacting the electric motor unit 11 to energize and interrupt the energization (operate the electric motor unit 11). A contact grease (not shown) is applied to the surface to prevent contact failure with the contacts 25a, 25b, and 25c and electric leakage. The cam plate 24 is located on the radially outer side of the notch 24a and the notch 24a with the inner circumferential side cut out radially outward, and the outer peripheral side of the cam plate 24 bulges radially outward. And a bulging portion 24b.

  FIG. 6 is a view showing a state in which the gear mechanism 18 is removed from the gear case 16 shown in FIG. 1, and on the bottom side of the gear case 16, there are three contact points slidably in contact with the cam plate 24 mounted on the back of the worm wheel 19. 25a and 25b, 25c are provided integrally. These contact points 25a, 25b, and 25c are configured to come into sliding contact with the cam plate 24 when the worm wheel 19 is attached to the gear case 16.

  The contact 25a is slidably contacted on the notch 24a as shown by the broken line a in FIG. 5, the contact 25b is always slidably contacted on the cam plate 24 as shown by the broken line b in FIG. As shown by a broken line c, the bulge portion 24b is slidably contacted. The contacts 25a, 25b, and 25c are connected to wiring and the like to the electric motor unit 11 in the connector unit 17 shown in FIG.

  The cam plate 24 is configured to short-circuit the contact 25a and the contact 25b, or short-circuit the contact 25b and the contact 25c. Thus, by switching the short-circuit state, an operation switch (not shown) is turned off. When this happens, the wiper blade can be stopped at the lower end of the windshield or rear glass. That is, the cam plate 24 functions as a functional component in an automatic fixed position stop device for positioning the wiper blade at a fixed position.

  A through hole 16a is provided at the bottom of the gear case 16, and a bearing 26 is mounted in the through hole 16a. An output shaft 21 is rotatably mounted on the bearing 26.

  A method for assembling the gear mechanism 18 in the motor apparatus 10 configured as described above will be described with reference to FIGS. 2 and 7. FIG. 7 is a view for explaining the assembly procedure of the gear mechanism 18 shown in FIG. 1. First, the lower end side of the output shaft 21 in FIG. 7 is inserted into the second through hole 22 b of the connecting plate 22, and the connecting plate 22 is inserted. The spur gear 21a of the output shaft 21 is brought into contact with the lower surface in the figure. Thereafter, in this state, the second pin 20c of the sector gear 20 is inserted into the first through hole 22a of the connecting plate 22 so that the spur gear 20a of the sector gear 20 and the spur gear 21a of the output shaft 21 are engaged with each other. Then, the cover 23 is exposed from the upper side of the sector gear 20 in FIG. 7, and the first cap portion 23a and the second cap portion 23b are respectively covered on the first pin 20b and the second pin 20c of the sector gear 20, and the claw portion 23c. Is hooked on the connecting plate 22. In this manner, the assembly S (sub-assembly) including the sector gear 20, the output shaft 21, the connecting plate 22, and the cover 23 is assembled.

  Next, the sliding grease G is injected into the connection hole 19c of the worm wheel 19 manually or by a grease feeder (grease supply device) provided in an assembly device (not shown). Thereafter, the assembly S assembled as described above is lowered from the upper side in the figure as indicated by the arrow in the figure, and the lower end side of the first pin 20b of the sector gear 20 in the figure is attached to the connecting hole 19c. Note that the lower end side of the output shaft 21 in the figure is inserted into a bearing 26 provided in the gear case 16 shown in FIG.

  With the mounting of the first pin 20b to the connecting hole 19c, the air inside the connecting hole 19c escapes upward in the figure through the groove portion 19d formed in the connecting hole 19c, and the first pin 20b with respect to the connecting hole 19c. It can be installed smoothly without resistance and can be brought into close contact with each other. At this time, even if the injection amount of the sliding grease G into the connecting hole 19c is large and an excessive amount is generated, the excessive sliding grease G escapes upward in the figure through the groove portion 19d like the air. be able to. The sliding grease G that has slipped upward in the drawing is supplied between the lower surface of the sector gear 20 in the drawing and the upper surface of the connecting hole 19c in the drawing, so that the relative relationship between the worm wheel 19 and the sector gear 20 is provided. Convenient for reducing the rotational resistance (friction resistance).

  According to the first embodiment of the present invention configured as described above, the cross-sectional shape of the bottomed connecting hole 19c in the worm wheel 19 and the first pin 20b of the sector gear 20 is changed to the groove 19d in the connecting hole 19c. Since the first pin 20b is inscribed in the connecting hole 19c so as to be rotatable, the connecting hole 19c can rotatably support the first pin 20b and extends in the axial direction between the two. A gap can be formed. Therefore, the excess sliding grease G injected into the connecting hole 19c can escape through the groove portion 19d, and does not jump out to the opposite side of the worm wheel 19, that is, the cam plate 24 side. Therefore, the contact grease applied to the surface of the cam plate 24 and the sliding grease G are not mixed, and the occurrence of problems such as poor conduction due to the hardening of the grease on the cam plate 24 is prevented and reliability is improved. Can be improved.

  Further, the excess sliding grease G injected into the connecting hole 19c is supplied between the sector gear 20 and the connecting hole 19c, and the frictional resistance between the worm wheel 19 and the sector gear 20 is lowered. It is not necessary to control the injection position and injection amount of G into the connecting hole 19c so accurately, and the assembly workability of the gear mechanism 18 and, consequently, the motor device 10 can be improved.

  Furthermore, since the excess sliding grease G can be held in the groove portion 19d and the groove portion 19d can function as a grease reservoir, the frictional resistance between the connecting hole 19c and the first pin 20b is low over a long period of time. Can be kept in a state.

  Next, a modification of the first embodiment of the present invention will be described with reference to FIGS. Note that members having the same functions as those in the first embodiment described above are denoted by the same reference numerals, and description thereof is omitted.

  FIG. 8 is a perspective view showing a worm wheel 19 and a sector gear 20 according to a modification of the first embodiment, and FIG. 9 is a plan view showing the sector gear 20 of FIG. As shown in FIG. 8, no groove is formed in the connecting hole 19c of the worm wheel 19, and instead, the sector pin is connected to the first pin 20b of the sector gear 20 in the axial direction, that is, from the end face side of the first pin 20b. A groove portion 20d having a substantially semicircular cross section extending in the axial direction to the surface 20 is formed. As shown in FIG. 9, the groove 20 d is provided so as to be recessed inward with respect to the radial direction of the first pin 20 b, so that the cross-sectional shape of the connecting hole 19 c and the first pin 20 b can be made mutually different. As an irregular shape, a gap extending in the axial direction is formed between the two by the groove 20d.

  Also in the modification of the first embodiment configured as described above, excess sliding grease injected into the connection hole 19c can escape through the groove 20d, and is the same as in the first embodiment described above. The effect of this can be achieved.

  Next, a second embodiment of the present invention will be described using FIG. 10 and FIG. Note that members having the same functions as those in the first embodiment described above are denoted by the same reference numerals, and description thereof is omitted.

  FIG. 10 is a plan view showing the worm wheel 19 according to the second embodiment of the present invention as a single unit, and FIG. 11 is a cross-sectional view taken along the line BB of FIG. As shown in FIGS. 10 and 11, the bottom side of the connecting hole 19 c provided in the worm wheel 19 is directed radially outward of the worm wheel 19, that is, toward the tooth portion 19 a serving as the outer peripheral wall surface of the worm wheel 19. An extending radial hole 19e is provided. The radial hole 19e is formed as a hole having a diameter of 1 mm by a processing means such as drilling.

  Also in the second embodiment configured as described above, even when the sliding grease is injected into the connecting hole 19c, even if the injection amount is large and a surplus is generated, the surplus sliding grease is combined with the air. 11 can be pulled out to the right in FIG. 11 through the radial hole 19e, and therefore, the same operational effects as those of the first embodiment described above can be achieved. In addition to this, in the second embodiment, the radial hole 19e is provided so as to penetrate between the bottom side of the connecting hole 19c and the tooth portion 19a, so that the tooth portion 19a of the worm wheel 19 and the worm gear 15 are provided. Since excess sliding grease can be supplied between the tooth portions 15a, the frictional resistance between the tooth portions can be kept low for a long period of time.

  Next, a third embodiment of the present invention will be described with reference to FIG. Note that members having the same functions as those in the first embodiment described above are denoted by the same reference numerals, and description thereof is omitted.

  FIG. 12 is a partially enlarged view showing a motor device according to a third embodiment of the present invention. The motor device 30 shown in FIG. 12 is a so-called connecting rod type power as a power transmission member (oscillating motion conversion member). A transmission member is used. A first pin 31 a provided on one side (right side in the figure) of the connecting rod 31 is rotatably mounted in a connecting hole 19 c of the worm wheel 19 provided in the motor device 30. The first pin 31a is formed by horizontally cutting a part of a cylinder so that the cross section is substantially D-shaped, and thereby, the cross-sectional shape of the connecting hole 19c and the first pin 31a is made mutually. As a deformed shape, a gap L extending in the axial direction is formed between the two.

  A second pin 31b is provided on the other side (left side in the figure) of the connecting rod 31, and the second pin 31b is rotatably connected to a swing member 21b provided on the output shaft 21 and having the output shaft 21 as a rotation shaft. Has been. As the worm wheel 19 rotates, the first pin 31a of the connecting rod 31 rotates, and the second pin 31b of the connecting rod 31 is guided by the arcuate guide C provided in the gear case 16, and as a result, the output shaft 21 is It can be swung.

  Even in the third embodiment configured as described above, even when the sliding grease is injected into the connecting hole 19c and the injection amount is large and a surplus amount is generated, the surplus sliding grease is At the same time, it can come out to the front side of the sheet in FIG. 12 via the gap L, and therefore, the same operational effects as those of the first embodiment described above can be achieved.

  It goes without saying that the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the scope of the invention. For example, in the first and third embodiments, either the connecting hole or the pin is formed to have a different shape with respect to the mounting partner, and a gap is formed between the mounting partner and the mounting partner. However, the present invention is not limited to this, and if the pin is inscribed in the connection hole and can be rotated, both the connection hole and the pin are formed in an irregular shape so that a gap is formed between them. You may do it.

  Moreover, in the said 1st and 3rd embodiment, although what provided the groove part and the part cut horizontally at one place in the circumferential direction was shown, this invention is not restricted to this, A plurality is provided in the circumferential direction. You may make it provide a part. In this case, it is desirable that the pins are provided at equal angular intervals in order to evenly transmit the load applied to the pins in the circumferential direction.

  Furthermore, when providing one groove part, it is located in the radial direction outermost peripheral position of a worm wheel with respect to a connection hole, However, You may provide in the position where the load of a load with a connection hole and a pin is hard to apply.

  Moreover, in the said 2nd Embodiment, although the radial direction hole extended toward a tooth | gear part is provided, it is not restricted to this, It is the structure where sliding grease cannot come out on the back surface (electric conduction part side) of a worm wheel. If present, the radial holes may be formed obliquely from the bottom side of the connecting holes.

  Further, in each of the above embodiments, the motor device is used for the rear wiper device. However, the present invention is not limited to this, and can be used for a front wiper device for wiping a windshield of a vehicle or the like. In short, the present invention can be applied to any motor device provided with a power transmission member (link) connected to a connecting hole of a rotating body via a pin, and its use is not limited.

It is a front view which shows the motor apparatus which is 1st Embodiment of this invention. It is a disassembled perspective view which shows the gear mechanism in the motor apparatus shown in FIG. It is a top view which shows the worm wheel shown in FIG. 2 alone. It is sectional drawing which follows the AA line of FIG. It is a bottom view which shows the worm wheel shown in FIG. 3 alone. It is a figure which shows the state which removed the gear mechanism from the gear case shown in FIG. It is a figure explaining the assembly | attachment procedure of the gear mechanism shown by FIG. It is a perspective view which shows the worm wheel and sector gear which concern on the modification of 1st Embodiment. It is a top view which shows the sector gear of FIG. It is a top view which shows the worm wheel which concerns on 2nd Embodiment in this invention alone. It is sectional drawing which follows the BB line of FIG. It is the elements on larger scale which show the motor apparatus which concerns on 3rd Embodiment in this invention.

Explanation of symbols

10, 30 Motor device 11 Electric motor part (motor body)
12 Gear unit 13 Motor case 14 Drive shaft 15 Worm gear (worm)
15a Tooth part 16 Gear case 16a Through hole 17 Connector part 18 Gear mechanism 19 Worm wheel (rotating body)
19a Tooth part 19b Rotating shaft 19c Connection hole 19d Groove part 19e Radial hole 20 Sector gear (power transmission member, swing motion conversion member)
20a Spur gear 20b, 31a First pin (pin)
20c, 31b Second pin 20d Groove part 21 Output shaft 21a Spur gear 21b Oscillating member 22 Connecting plate 22a First through hole 22b Second through hole 23 Cover 23a First cap part 23b Second cap part 23c Claw part 24 Cam plate ( Conductive part)
24a notch 24b bulge 25a, 25b, 25c contact 26 bearing 31 connecting rod (power transmission member, swing motion conversion member)
C Arc guide G Sliding grease L Clearance S Assembly

Claims (5)

A motor device having a rotating body rotated by a drive shaft of a motor body,
A bottomed connecting hole provided in the rotating body apart from the rotation center of the rotating body;
A power transmission member having one side rotatably mounted in the coupling hole via a pin and the other side coupled to the driven object;
The motor device according to claim 1, wherein a cross-sectional shape of the connection hole and the pin is an irregular shape that is rotatable with the pin inscribed in the connection hole.   2. The motor device according to claim 1, wherein the connection hole and the pin are each formed in a columnar shape, and at least one of the connection hole and the pin is formed in an axial direction to form a gap with a mounting partner. A motor device characterized in that an extending groove is formed. A motor device having a rotating body rotated by a drive shaft of a motor body,
A bottomed connecting hole provided in the rotating body apart from the rotation center of the rotating body;
A conductive portion provided at the back of the connection hole of the rotating body, and a contact portion that contacts the contact for operating the motor body;
A power transmission member having one side rotatably mounted in the coupling hole via a pin and the other side coupled to the driven object;
A motor device, wherein a radial hole extending in a radial direction from the bottom side of the coupling hole toward an outer peripheral wall surface of the rotary body is formed in the rotary body.   4. The motor device according to claim 1, wherein the drive shaft is a worm, the rotating body is a worm wheel that is decelerated by the worm, and the power transmission member performs a rotational motion of the worm wheel. 5. A motor device characterized by being a swing motion conversion member that converts into swing motion.   5. The motor device according to claim 4, further comprising an output shaft that can be rotated by the swing motion conversion member, and a wiper arm attached to the output shaft.

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