JP2014093787A - Motor device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve maintainability while reducing the number of components.SOLUTION: A motor device includes: a first radial-direction positioning surface 45b which is provided further outside in the radial direction than a support pin 70 of a pin fixing part 42 and faces an output member 50; a second radial-direction positioning surface 53b which is provided further outside in the radial direction than the support pin 70 of the output member 50 and faces the pin fixing part 42; and an O-ring 60 for sealing the inside and the outside of a housing provided between the first radial-direction positioning surface 45b and the second radial-direction positioning surface 53b. Thereby, one O-ring 60 can prevent an entering object W from entering the housing from both end sides of the support pin 70. The O-ring 60 is separated from the support pin 70, and accordingly, a high temperature of the support pin 70 can be suppressed from being transmitted to the O-ring 60, even if the support pin 70 is made from a metal.

Description

  The present invention relates to a motor device including an output member that outputs rotation of a rotating shaft to a driving object.

  2. Description of the Related Art Conventionally, as a drive source for a power window device, a sunroof device, or the like mounted on a vehicle such as an automobile, a motor device incorporating a reduction mechanism that is small in size and that can provide a large output is used. This motor device is rotationally driven by an operator operating an operation switch provided in the passenger compartment, and thereby opens and closes an opening / closing body (window glass, sunroof, etc.).

  The motor device includes a motor unit and a gear unit, and a rotation shaft is rotatably accommodated in a motor case forming the motor unit, and a speed reduction mechanism including a plurality of gears and the like is rotated in a housing forming the gear unit. It is freely housed. Further, since the motor device is mounted outside the passenger compartment such as in the door or roof of the vehicle, there are many opportunities to be exposed to rainwater, dust, and the like. Therefore, the motor device includes a plurality of seal members in order to prevent rainwater, dust, and the like from entering the inside (see, for example, Patent Document 1).

  The motor device described in Patent Document 1 includes a gear case (housing) having a bottom portion and a support pin inserted and fixed to the bottom portion, and a worm wheel is rotatably mounted on a support cylinder formed on the bottom portion of the gear case. The output member is rotatably mounted on the support pin. An O-ring (seal member) is mounted between the support pin and the gear case and between the support pin and the output member in order to prevent rainwater, dust, and the like from entering from outside the gear case. This prevents rainwater, dust, and the like from entering the gear case from the outside of the gear case via both end sides of the support pin, and thus improves the reliability of the motor device.

JP 2012-062981 A (FIG. 2)

  However, according to the motor device described in Patent Document 1 described above, since it is necessary to mount two seal members on the support pin, the number of parts is increased correspondingly, and the assembly work of each seal member is further increased. Can be complicated. Further, since the support pin supports the output member so as to be rotatable, it is desirable that the support pin be formed of a relatively high strength member. Therefore, a steel rod made of a metal material may be employed. In this case, by using the motor device in a high temperature environment such as a hot summer in the summer, a high temperature is transmitted to the seal member via the support pin, which may cause problems such as early deterioration of the seal member.

  The objective of this invention is providing the motor apparatus provided with the seal structure which can improve maintainability, reducing a number of parts.

  The motor device of the present invention is a motor device provided with an output member that outputs rotation of a rotating shaft to a driving object, and is provided at a housing that rotatably accommodates the output member, and at a bottom portion of the housing, A pin fixing portion having a through-hole penetrating the inside and outside of the housing; a support pin fixed to the through-hole and rotatably supporting the output member; and a radially outer side of the pin fixing portion than the support pin A first seal holding portion provided opposite to the output member; a second seal holding portion provided radially outside the support pin of the output member; and facing the pin fixing portion; and the first seal. A sealing member provided between the holding portion and the second seal holding portion and sealing the inside and outside of the housing.

  In the motor device of the present invention, the first seal holding portion and the second seal holding portion are arranged to face each other in the radial direction of the support pin, and at least one of the seal members along the axial direction of the support pin. A backlash absorbing portion having a gap larger than an axial backlash amount of the output member with respect to the pin fixing portion is provided on one side.

  In the motor device of the present invention, the output member is formed by integrating a worm wheel portion to which the rotation of the rotation shaft is transmitted and a rotation transmission portion for transmitting the rotation of the worm wheel portion to the driving object. The worm wheel portion is rotatably provided on the pin fixing portion, and the rotation transmitting portion is rotatably provided on the support pin.

  According to the motor device of the present invention, the first seal holding portion facing the output member is provided on the radially outer side than the support pin of the pin fixing portion, and the pin fixing portion is disposed on the radially outer side of the support pin of the output member. A second seal holding portion is provided opposite to the first seal holding portion, and a seal member for sealing the inside and outside of the housing is provided between the first seal holding portion and the second seal holding portion. As a result, by providing one seal member at a position away from the support pin in the radial direction and between the pin fixing portion and the output member, rainwater, dust, etc. can be accommodated through the both ends of the support pin. You can stop entering. Therefore, the number of parts can be reduced by reducing the number of seal members to one as necessary, and assembling work can be simplified. Further, since the seal member is provided to be spaced radially outward from the support pin, even if the support pin is made of a metal material, high temperature can be prevented from being transmitted to the seal member. Therefore, it is possible to suppress the early deterioration of the seal member and improve the maintainability of the motor device.

  According to the motor device of the present invention, the first seal holding portion and the second seal holding portion are arranged to face each other in the radial direction of the support pin, and are arranged on at least one side along the axial direction of the support pin of the seal member. A backlash absorbing portion having a gap larger than the backlash amount in the axial direction of the output member with respect to the pin fixing portion is provided. Thereby, when the forward / reverse rotation of the rotation shaft is switched, even if the output member rattles in the axial direction of the support pin, the backlash does not cause the seal member to be crushed in the axial direction. Therefore, an increase in rotational resistance of the output member due to elastic deformation of the seal member can be suppressed while suppressing uneven wear of the seal member. Therefore, the motor device can be stably operated while improving the moisture reliability of the motor device.

  According to the motor device of the present invention, the output member is formed by integrating the worm wheel portion to which the rotation of the rotation shaft is transmitted and the rotation transmission portion for transmitting the rotation of the worm wheel portion to the driving object. A wheel part is provided rotatably on the pin fixing part, and a rotation transmission part is provided rotatably on the support pin. Thereby, generation | occurrence | production of the noise from a motor apparatus can be suppressed, reducing a number of parts compared with what separates the worm wheel part and the rotation transmission part.

It is a top view which shows the motor with a reduction mechanism which concerns on one embodiment of this invention. It is sectional drawing which follows the AA line of FIG. It is a partial expanded sectional view which expands and shows the pin fixing | fixed part of a housing. It is sectional drawing which shows an output member. It is operation | movement explanatory drawing which expands and shows the broken-line circle | round | yen B part of FIG.

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

  1 is a plan view showing a motor with a speed reduction mechanism according to an embodiment of the present invention, FIG. 2 is a cross-sectional view taken along the line AA of FIG. 1, and FIG. 3 is an enlarged view of a pin fixing portion of the housing. 4 is a partial enlarged cross-sectional view, FIG. 4 is a cross-sectional view showing the output member, and FIG. 5 is an operation explanatory view showing an enlarged broken-line circle B portion in FIG.

  As shown in FIG. 1, a motor 10 with a speed reduction mechanism as a motor device is used as a drive source of a power window device (not shown) mounted on a vehicle such as an automobile, and is a wind regulator (see FIG. (Not shown). Since the motor 10 with a speed reduction mechanism is installed in a narrow space (not shown) formed in the door of the vehicle, it is formed in a flat shape as shown in FIG. The motor 10 with a speed reduction mechanism includes a motor unit 20 and a gear unit 30, and the motor unit 20 and the gear unit 30 are connected (unitized) by a plurality of fastening screws 11 (two in the drawing).

  The motor unit 20 includes a motor case 21 formed into a bottomed cylindrical shape by pressing (deep drawing) a steel plate made of a magnetic material. Inside the motor case 21, a plurality of magnets 22 (two in the drawing) having a substantially arc-shaped cross section are fixed, and inside each magnet 22, an armature 24 around which a coil 23 is wound, The magnet 22 is housed rotatably with a predetermined gap with respect to the inner peripheral surface of each magnet 22.

  An armature shaft 25 as a rotation axis is fixed to the rotation center of the armature 24 so as to penetrate therethrough. A commutator 26 is provided at a position near the armature 24 of the armature shaft 25, and an end of a coil 23 wound around the armature 24 is electrically connected to the commutator 26.

  A pair of brushes 27 are in sliding contact with the outer periphery of the commutator 26, and each brush 27 is elastically contacted with a predetermined pressure toward the commutator 26 by a spring member 28. As a result, a driving current from a controller (not shown) is supplied to each brush 27 via the connector member 31, whereby a rotational force (electromagnetic force) is generated in the armature 24, and consequently the armature shaft 25 is predetermined. It is designed to rotate at the rotational speed and torque.

  The gear unit 30 includes a housing 40, a connector member 31, and a bottom cover 32. The housing 40 is formed into a predetermined shape by injection molding a resin material such as plastic, and is connected to the opening side (right side in the figure) of the motor case 21.

  Inside the housing 40, a worm shaft 33, in which a worm 33a (see FIG. 2) is integrally formed on the outer peripheral portion, is rotatably accommodated. The worm shaft 33 is provided integrally with the armature shaft 25, and the armature shaft It rotates with 25. Here, the worm shaft 33 may be connected separately from the armature shaft 25 so as to rotate integrally with each other via a connecting member (not shown).

  An output member 50 is rotatably accommodated inside the housing 40, and a tooth portion 51e of the worm wheel portion 51 forming the output member 50 is engaged with the worm 33a. Here, although not shown in detail, the worm 33 a is formed in a spiral shape, and the tooth portion 51 e is inclined at a gentle inclination angle in the axial direction of the output member 50. Thereby, the rotation of the worm shaft 33 can be smoothly transmitted to the worm wheel portion 51 without being twisted.

  The worm 33a and the worm wheel portion 51 constitute a speed reduction mechanism. The speed reduction mechanism reduces the rotation of the armature shaft 25 to a predetermined speed to increase the torque, and rotates the rotation with the increased torque. The signal is output to the window regulator (driven object) via the transmission unit 52.

  As shown in FIGS. 2 and 3, the housing 40 includes a bottom 41. A pin fixing portion 42 is integrally provided at a substantially central portion of the bottom portion 41 so as to protrude at a predetermined height toward the inside of the housing 40. The pin fixing portion 42 is formed in a substantially cylindrical shape, and supports the worm wheel portion 51 so as to be rotatable. Further, a through hole 42 a that penetrates the inside and outside of the housing 40 is formed inside the pin fixing portion 42.

  Further, a plurality of reinforcing ribs 43 (only two are shown in the figure) extending radially about the pin fixing portion 42 are provided on the opposite side of the bottom portion 41 from which the pin fixing portion 42 protrudes, that is, outside the bottom portion 41. Is provided. As a result, the bottom 41 is thinned to reduce the weight of the housing 40 while ensuring sufficient strength.

  The distal end side (upper side in the figure) of the pin fixing portion 42 is formed in a tapered shape in which the height in the axial direction increases and the radial dimension decreases as it goes toward the distal end. Further, an annular sliding contact portion 44 having an outer dimension larger than the outer diameter size of the pin fixing portion 42 is formed to protrude from the bottom portion 41 on the outer peripheral portion on the base end side (lower side in the drawing) of the pin fixing portion 42. Has been. The sliding contact portion 44 is supplied with sliding grease (not shown) stored in the grease reservoir 51c of the worm wheel portion 51 while the worm wheel portion 51 is in sliding contact therewith. Thereby, the output member 50 can be smoothly rotated for a long time inside the housing 40.

  A first positioning portion 45 that positions the O-ring (seal member) 60 is formed on the distal end side (upper side in the drawing) of the pin fixing portion 42. The first positioning portion 45 is formed in an annular shape having a through hole 42a at the center, and a first axial positioning surface 45a for positioning the pin fixing portion 42 of the O ring 60 in the axial direction, and a pin fixing portion of the O ring 60 And a first radial positioning surface 45b for positioning in the radial direction of 42.

  Here, the first radial positioning surface 45b constitutes a first seal holding portion in the present invention, and the first radial positioning surface 45b is radially outward from the support pin 70 of the pin fixing portion 42. Is provided. The first radial positioning surface 45 b faces a second radial positioning surface 53 b (described later) of the output member 50 toward the radial direction of the support pin 70. The O-ring 60 is made of an elastic material such as rubber.

  Then, the O-ring 60 is mounted on the first positioning portion 45 as shown in FIG. At this time, the O-ring 60 is fixed so as to be in close contact with both the first axial positioning surface 45a and the first radial positioning surface 45b by its elastic force. For this reason, the O-ring 60 is not rattled by the first positioning portion 45. Thus, by positioning the O-ring 60 with the first positioning portion 45, the O-ring 60 is caught between the pin fixing portion 42 and the output member 50 when the output member 50 is assembled to the pin fixing portion 42. It is rarely damaged.

  A first annular tapered surface 42 b is formed on the outer peripheral portion on the tip side of the pin fixing portion 42. The first annular tapered surface 42b functions as a mounting guide for the output member 50 when the output member 50 is mounted on the pin fixing portion 42, and the second annular tapered surface 51d of the output member 50 (FIG. 4). See). Thereby, the assembly workability | operativity of the motor 10 with a deceleration mechanism is improved.

  A support pin 70 that rotatably supports the output member 50 inside the housing 40 is fixed through the through hole 42 a of the pin fixing portion 42. The support pin 70 is a steel rod made of a metal material such as stainless steel, and rotatably supports a rotation transmission portion 52 described later of the output member 50. On the base end side in the axial direction of the support pin 70 (lower side in the figure), serrations 71 having a plurality of irregularities are formed along the circumferential direction. The support pin 70 is firmly fixed to the pin fixing portion 42 by press-fitting the serration portion 71 into the through hole 42a.

  Here, the outer diameter dimension of the serration portion 71 is set to be slightly larger than the inner diameter dimension of the through hole 42a, whereby the serration portion 71 is firmly fixed so as to bite inside the through hole 42a. On the other hand, the outer diameter dimension of the other part of the support pin 70 excluding the serration portion 71 is set to be slightly smaller than the inner diameter dimension of the through hole 42a, whereby the support pin 70 is inserted into and pressed into the through hole 42a. Can be done easily. The support pin 70 is inserted and press-fitted into the through-hole 42a from the lower side of FIGS. 2 and 3, that is, from the outside of the housing 40 across the bottom 41 to the inside of the housing 40. .

  When the support pin 70 is assembled to the housing 40, the tip end side in the axial direction (upper side in the figure) protrudes from the pin fixing portion 42 and passes through the inside of the housing 40, and protrudes larger than the thickness dimension t of the housing 40. Extends from the housing 40. Here, the protrusion amount of the support pin 70 from the pin fixing portion 42 is approximately half the length of the support pin 70. Thus, the fixing strength of the support pin 70 to the pin fixing portion 42 is ensured, and the tilting or rattling of the support pin 70 with respect to the pin fixing portion 42 during the operation of the motor 10 with the speed reduction mechanism is suppressed. Generation | occurrence | production of abnormal noise (mechanical operating sound) is suppressed, operating the motor 10 smoothly.

  As shown in FIGS. 2 and 4, the output member 50 outputs the rotation of the armature shaft 25 to the window regulator, and has a large diameter worm wheel portion 51 and a rotation transmission having a smaller diameter than the worm wheel portion 51. Part 52. The worm wheel portion 51 and the rotation transmission portion 52 are integrally formed by injection molding a molten resin.

  A cylindrical support portion 51 a is provided on the radially inner side of the worm wheel portion 51, and the cylindrical support portion 51 a is rotatably supported by the pin fixing portion 42. A support end 51b that is in sliding contact with the sliding contact portion 44 is formed on one side (lower side in the drawing) of the cylindrical support 51a. The support end 51b includes a support end 51b. A plurality of grease reservoirs 51c (only two are shown in the figure) are provided at equal intervals along the circumferential direction. The grease reservoir 51c is filled with sliding grease (not shown) when the motor 10 with a speed reduction mechanism is assembled.

  A second annular tapered surface 51d is formed on the radially inner side of the support end 51b. The second annular tapered surface 51d faces the first annular tapered surface 42b when the motor 10 with the speed reduction mechanism is assembled. It is supposed to be. That is, the second annular taper surface 51d cooperates with the first annular taper surface 42b to guide the mounting of the output member 50 to the pin fixing portion 42.

  A tooth part 51e meshed with the worm 33a is formed on the radially outer side of the cylindrical support part 51a. The tooth part 51e follows a spiral shape of the worm 33a with a gentle inclination angle (not shown in detail). It is inclined. Moreover, between the cylindrical support part 51a and the tooth | gear part 51e, the some meat stealing part 51f is formed, Of course, the weight reduction of the output member 50 is provided by providing each meat stealing part 51f, Generation of so-called sink marks and voids that occur during injection molding is prevented, and the molding accuracy of the cylindrical support portions 51a and the tooth portions 51e is improved.

  One side in the axial direction of the rotation transmitting portion 52 is integrally provided on the other side in the axial direction (upper side in the drawing) of the worm wheel portion 51. An insertion hole 52a is formed at the rotation center of the rotation transmitting portion 52, and the support pin 70 is rotatably inserted into the insertion hole 52a. That is, the rotation transmission part 52 is rotatably supported by the support pin 70. Thus, the output member 50 is integrally formed with the worm wheel portion 51 that is rotatably supported by the pin fixing portion 42 and the rotation transmission portion 52 that is rotatably supported by the support pin 70. .

  A second positioning portion 53 for positioning the O-ring 60 is formed on one side in the axial direction of the insertion hole 52a in a state where the motor 10 with the speed reduction mechanism is assembled. The second positioning portion 53 is formed in an annular shape, and performs positioning in the radial direction of the rotation transmitting portion 52 of the O-ring 60 and a second axial positioning surface 53a that positions the O-ring 60 in the axial direction of the rotation transmitting portion 52. And a second radial positioning surface 53b.

  Here, the second radial positioning surface 53b constitutes the second seal holding portion in the present invention, and the second radial positioning surface 53b is more radially outward than the support pin 70 of the rotation transmitting portion 52. Is provided. The second radial positioning surface 53 b faces the first radial positioning surface 45 b of the pin fixing portion 42 in the radial direction of the support pin 70.

  A drive gear 52b that meshes with a gear (not shown) of a window regulator is formed on the outer peripheral portion on the other axial side of the rotation transmitting portion 52. That is, the rotation transmission unit 52 transmits the rotation of the worm wheel unit 51 to the window regulator. As shown in FIG. 2, the drive gear 52 b is disposed outside the housing 40 via the bottom cover 32.

  A cylindrical portion 52 d is provided at a substantially intermediate portion between the drive gear 52 b and the worm wheel portion 51 along the axial direction of the rotation transmitting portion 52. A lip seal portion 32a provided integrally with the bottom cover 32 is in sliding contact with the outer peripheral portion of the cylindrical portion 52d. Thereby, the space between the rotation transmitting portion 52 and the bottom cover 32 is sealed to prevent rainwater, dust, or the like from entering the housing 40 via the portion.

  A plurality of meat stealing portions 52 c are formed between the insertion hole 52 a along the radial direction of the rotation transmitting portion 52 and the drive gear 52 b and at both ends along the axial direction of the rotation transmitting portion 52. Also in each of these meat stealing portions 52c, not only the weight of the output member 50 but also the so-called sinks and voids that occur during injection molding are prevented, and the molding accuracy of the insertion hole 52a and the drive gear 52b is improved. Yes.

  The O-ring 60 seals the inside and outside of the housing 40, and as shown in FIG. 5, the first positioning portion 45, the second positioning portion 53, and the like are separated from the support pin 70 radially outward. Is held between. Specifically, the O-ring 60 comes into contact with both the first radial positioning surface 45b and the second radial positioning surface 53b at the contact portions SP1 and SP2 (black circle portions in the figure), respectively. Yes. The O-ring 60 is sandwiched between the first radial positioning surface 45b and the second radial positioning surface 53b in an elastically deformed state so as to be slightly compressed.

  Accordingly, the O-ring 60 tries to enter the inside of the housing 40 via the clearance CL1 between the support pin 70 and the pin fixing portion 42 and the clearance CL2 between the support pin 70 and the rotation transmitting portion 52. Intrusion object W such as rainwater or dust is prevented from entering.

  A gap S having a predetermined dimension is formed between the O-ring 60 and the second axial positioning surface 53a in a state where the O-ring 60 and the first axial positioning surface 45a are in contact with each other. This gap S is set to a gap size larger than the amount of play δG generated when the output member 50 moves in the direction of arrow M with respect to the pin fixing portion 42 during operation of the motor 10 with the speed reduction mechanism. Yes. That is, this gap S constitutes the backlash absorbing portion GA in the present invention.

  Thus, by setting the size of the gap S to be larger than the backlash amount δG of the output member 50 with respect to the pin fixing portion 42 (S> δG), an excessive force is applied to the O-ring 60 in the axial direction. Prevents being crushed. Thereby, while improving the sealing performance of the O-ring 60, the O-ring 60 is prevented from deteriorating at an early stage, and the rotational resistance of the output member 50 with respect to the pin fixing portion 42 is prevented from increasing.

  Next, the sealing operation (sealing effect) of the O-ring 60 in the motor 10 with the speed reduction mechanism formed as described above will be described in detail with reference to the drawings.

  As shown in FIG. 5, when the motor 10 with a speed reduction mechanism is exposed to rainwater, dust, or the like, an entering object W such as rainwater, dust, or the like from both ends of the support pin 70 in the axial direction passes through the clearances CL1, CL2. An attempt is made to enter the inside of the housing 40. Here, the clearances CL1 and CL2 are minute clearances (gap), and relatively large particulate matter such as sand hardly enters.

  Then, the entering object W that has entered the clearances CL1 and CL2 reaches the inside of the gap S (backlash absorbing portion GA). Thereafter, due to the sealing effect of the O-ring 60 that is in contact with (holding) both the first radial positioning surface 45b and the second radial positioning surface 53b via the contact portions SP1 and SP2, the housing 40 Of the entry W into the interior (shaded portion in the figure) of the.

  As described above in detail, according to the motor 10 with the speed reduction mechanism according to the present embodiment, the first radial positioning surface 45 b facing the output member 50 on the radially outer side than the support pin 70 of the pin fixing portion 42. A second radial positioning surface 53b facing the pin fixing portion 42 is provided on the radially outer side of the support pin 70 of the output member 50, and the first radial positioning surface 45b and the second radial positioning surface 53b are provided. An O-ring 60 that seals the inside and outside of the housing 40 was provided.

  As a result, the O pin 60 between the pin fixing portion 42 and the output member 50 is placed in the housing 40 via both ends of the support pin 70 at a position away from the support pin 70 in the radial direction. The entry W can be prevented from entering. Therefore, the number of parts can be reduced by making the O-ring 60 one of the minimum necessary, and as a result, the assembly work can be simplified. Further, since the O-ring 60 is provided so as to be spaced radially outward from the support pin 70, even the support pin 70 made of a metal material can suppress high temperature from being transmitted to the O-ring 60. Therefore, early maintenance of the O-ring 60 can be suppressed, and the maintainability of the motor 10 with the speed reduction mechanism can be improved.

  Further, according to the motor 10 with the speed reduction mechanism according to the present embodiment, the first radial positioning surface 45b and the second radial positioning surface 53b are arranged to face each other in the radial direction of the support pin 70, and the O-ring 60 On one side (upper side in FIG. 5) of the support pin 70 in the axial direction, a backlash absorbing portion GA having a gap S larger than a backlash amount δG in the axial direction of the output member 50 with respect to the pin fixing portion 42 is provided.

  As a result, even when the output member 50 rattles in the axial direction of the support pin 70 when switching the forward / reverse rotation of the armature shaft 25, the O-ring 60 is crushed in the axial direction due to the rattling. There is no. Therefore, an increase in rotational resistance of the output member 50 due to elastic deformation of the O-ring 60 can be suppressed while suppressing uneven wear of the O-ring 60. Therefore, it is possible to stably operate the motor 10 with the speed reduction mechanism while improving the moisture reliability of the motor 10 with the speed reduction mechanism.

  Furthermore, according to the motor 10 with the speed reduction mechanism according to the present embodiment, the output member 50 is rotated by the worm wheel portion 51 to which the rotation of the armature shaft 25 is transmitted and the rotation that transmits the rotation of the worm wheel portion 51 to the wind regulator. The transmission portion 52 is integrally formed, the worm wheel portion 51 is rotatably provided on the pin fixing portion 42, and the rotation transmission portion 52 is rotatably provided on the support pin 70.

  Thereby, generation | occurrence | production of the noise from the motor 10 with a speed-reduction mechanism can be suppressed, reducing a number of parts compared with what separates the worm wheel part 51 and the rotation transmission part 52. FIG.

  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 above embodiment, the backlash absorbing portion GA (gap S) is provided on one side along the axial direction of the support pin 70 of the O-ring 60. However, the present invention is not limited to this, You may make it provide in the other side (lower side in FIG. 5) along the axial direction of the support pin 70 of O-ring 60. FIG. In this case, the O-ring 60 may be attached to the second positioning portion 53 in advance when the motor 10 with the speed reduction mechanism is assembled.

  Moreover, in the said embodiment, although what was the O-ring 60 was shown as a sealing member in this invention, this invention is not restricted to this, The 1st radial direction positioning surface 45b, the 2nd radial direction positioning surface 53b, For example, a seal member such as a cup seal having a substantially V-shaped cross section may be adopted as long as the gap can be sealed.

  Furthermore, in the above embodiment, the output member 50 is shown in which the worm wheel part 51 and the rotation transmission part 52 are integrated, but the present invention is not limited to this, and the worm wheel part and the rotation transmission part are provided. It is also possible to adopt a structure in which an elastic body such as a damper rubber is interposed between the two so as to absorb vibration when the motor with a speed reduction mechanism is driven to rotate. In this case, as shown in FIG. 5, the worm wheel portion and the rotation transmission portion are separated from each other inside the housing 40 (the shaded portion side in the drawing) from the O-ring 60.

  Moreover, in the said embodiment, although what used the motor 10 with a deceleration mechanism as a motor apparatus as a drive source of the power window apparatus mounted in a vehicle was shown, this invention is not limited to this, A sunroof apparatus It can also be used as other drive sources.

  Furthermore, in the said embodiment, although what employ | adopted the electric motor with a brush as the motor part 20 was shown, this invention is not restricted to this, For example, a brushless electric motor etc. can also be employ | adopted.

10 Motor with reduction mechanism (motor device)
DESCRIPTION OF SYMBOLS 11 Fastening screw 20 Motor part 21 Motor case 22 Magnet 23 Coil 24 Armature 25 Armature axis (rotary axis)
26 Commutator 27 Brush 28 Spring member 30 Gear portion 31 Connector member 32 Bottom cover 32a Lip seal portion 33 Worm shaft 33a Worm 40 Housing 41 Bottom portion 42 Pin fixing portion 42a Through hole 42b First annular taper surface 43 Reinforcement rib 44 Slide contact portion 45 First positioning portion 45a First axial positioning surface 45b First radial positioning surface (first seal holding portion)
DESCRIPTION OF SYMBOLS 50 Output member 51 Worm wheel part 51a Cylindrical support part 51b Support end part 51c Grease storage 51d 2nd cyclic | annular taper surface 51e Tooth part 51f Meat stealing part 52 Rotation transmission part 52a Insertion hole 52b Drive gear 52c Meat stealing part 52d Cylindrical part 53 2nd positioning part 53a 2nd axial direction positioning surface 53b 2nd radial direction positioning surface (2nd seal holding part)
60 O-ring (seal member)
70 Support pin 71 Serration part CL1, CL2 Clearance GA Backlash absorption part S Gap W Incident object δG Backlash

Claims (3)

A motor device including an output member that outputs rotation of a rotation shaft to a driving object,
A housing for rotatably accommodating the output member;
A pin fixing portion provided at the bottom of the housing and having a through-hole penetrating the inside and outside of the housing;
A support pin fixed to the through hole and rotatably supporting the output member;
A first seal holding portion provided on a radially outer side than the support pin of the pin fixing portion and facing the output member;
A second seal holding portion provided on a radially outer side than the support pin of the output member and facing the pin fixing portion;
A seal member provided between the first seal holding part and the second seal holding part, for sealing the inside and outside of the housing;
A motor device comprising:   2. The motor device according to claim 1, wherein the first seal holding portion and the second seal holding portion are arranged to face each other in a radial direction of the support pin, and at least along an axial direction of the support pin of the seal member. A motor device, wherein a backlash absorbing portion having a gap larger than a backlash amount in the axial direction of the output member with respect to the pin fixing portion is provided on any one side.   3. The motor device according to claim 1, wherein the output member includes a worm wheel portion to which rotation of the rotation shaft is transmitted and a rotation transmission portion for transmitting rotation of the worm wheel portion to the driving object. The motor device is characterized in that the worm wheel portion is rotatably provided on the pin fixing portion, and the rotation transmitting portion is rotatably provided on the support pin.

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