CN112790653A - Opening/closing member drive device and toilet lid opening/closing unit - Google Patents
Opening/closing member drive device and toilet lid opening/closing unit Download PDFInfo
- Publication number
- CN112790653A CN112790653A CN202011270050.3A CN202011270050A CN112790653A CN 112790653 A CN112790653 A CN 112790653A CN 202011270050 A CN202011270050 A CN 202011270050A CN 112790653 A CN112790653 A CN 112790653A
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- Prior art keywords
- output shaft
- housing
- opening
- bearing
- gear
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- 230000003014 reinforcing effect Effects 0.000 claims abstract description 104
- 230000005540 biological transmission Effects 0.000 claims abstract description 36
- 230000002093 peripheral effect Effects 0.000 claims abstract description 32
- 239000002184 metal Substances 0.000 claims description 11
- 239000011347 resin Substances 0.000 claims description 11
- 229920005989 resin Polymers 0.000 claims description 11
- 230000000149 penetrating effect Effects 0.000 claims description 2
- 239000000758 substrate Substances 0.000 description 3
- 238000001514 detection method Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000011144 upstream manufacturing Methods 0.000 description 1
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Classifications
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47K—SANITARY EQUIPMENT NOT OTHERWISE PROVIDED FOR; TOILET ACCESSORIES
- A47K13/00—Seats or covers for all kinds of closets
- A47K13/10—Devices for raising and lowering, e.g. tilting or lifting mechanisms; Collapsible or rotating seats or covers
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47K—SANITARY EQUIPMENT NOT OTHERWISE PROVIDED FOR; TOILET ACCESSORIES
- A47K13/00—Seats or covers for all kinds of closets
- A47K13/24—Parts or details not covered in, or of interest apart from, groups A47K13/02 - A47K13/22, e.g. devices imparting a swinging or vibrating motion to the seats
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- Health & Medical Sciences (AREA)
- Public Health (AREA)
- Toilet Supplies (AREA)
- Power-Operated Mechanisms For Wings (AREA)
- Gear Transmission (AREA)
- General Details Of Gearings (AREA)
- Motor Or Generator Frames (AREA)
- Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
Abstract
Provided are an opening/closing member drive device and a toilet lid opening/closing unit, wherein an output shaft is not inclined by a load. The opening/closing member drive device (1) includes a reinforcing member (35) having higher rigidity than the housing (9) on the inner side of the housing (9). The output shaft (7) comprises a base (12) located within the housing (9) in the-Z direction; and a protrusion protruding from the housing (9) in the + Z direction. The transmission mechanism (8) includes an output gear (43) coaxially fixed to the base (12) of the output shaft (7). The housing (9) includes a cylindrical bearing section (19) in a second housing (23) covering the reinforcing member (35) from the + Z direction, and the bearing section (19) is coaxial with a housing opening section (10) through which the output shaft (7) passes and extends in the Z-axis direction within the housing (9). The output shaft (7) includes a supported portion (64) having a circular outer peripheral surface in the + Z direction of the output gear (43) at the base portion (12). The bearing (19) rotatably supports the bearing-receiving portion (64) from the outer peripheral side. The reinforcing member (35) includes a bearing reinforcing portion (24) that surrounds the bearing portion (19) and that contacts the bearing portion (19) from the outer peripheral side.
Description
Technical Field
The present invention relates to an opening/closing member driving device that drives an opening/closing member, and a toilet lid opening/closing unit that opens and closes a toilet lid of a toilet unit as an opening/closing member.
Background
Patent document 1 discloses an opening/closing member driving device for opening/closing an opening/closing member such as a toilet lid. The opening and closing member driving device of patent document 1 includes: a motor; an output shaft connected to the opening and closing member; a transmission mechanism that transmits a driving force of the motor to the output shaft; and a housing accommodating the motor and the transmission mechanism. The output shaft protrudes to the outside from an opening provided in the housing. The case is made of resin.
Documents of the prior art
Patent document
Patent document 1: japanese patent laid-open No. 2016-77396
Disclosure of Invention
Technical problem to be solved by the invention
The output shaft is connected to an end of the opening and closing member to open and close the opening and closing member in a cantilever state. Therefore, when the opening/closing member is opened or closed, a load is applied to the output shaft. Here, when the support portion that rotatably supports the output shaft is provided in the housing, the housing may be bent by a load applied to the output shaft, and the output shaft may be inclined. When the output shaft is inclined, the transmission efficiency of torque to the opening/closing member is deteriorated.
In view of the above, an object of the present invention is to provide an opening/closing member driving device and a toilet lid opening/closing unit that can prevent or suppress the inclination of an output shaft due to a load when opening/closing an opening/closing member.
Technical scheme for solving technical problem
In order to solve the above-described problems, an opening/closing member driving device according to the present invention includes: a motor; an output shaft connected to the opening and closing member; a transmission mechanism that transmits a driving force of the motor to the output shaft; a housing that houses the motor and the transmission mechanism; and a reinforcing member that is higher in rigidity than the housing and is fixed to an inner side of the housing, the output shaft including, when a direction along an axis of the output shaft is an axis direction, one side of the axis direction is a first direction, and the other side is a second direction: a base located within the housing; and a protruding portion protruding from the housing in the second direction of the base portion, the transmission mechanism including an output gear coaxially fixed to a base portion of the output shaft, the housing including a housing portion that covers the reinforcing member from one side in the second direction, the housing portion including: an opening portion that protrudes the output shaft from an inner side to an outer side of the housing; and a cylindrical bearing portion extending coaxially with the opening portion inside the housing, the output shaft including a bearing-receiving portion having a circular outer peripheral surface in the second direction of the output gear at the base portion, the bearing portion rotatably supporting the bearing-receiving portion from an outer peripheral side, the reinforcing member having a bearing reinforcing portion surrounding the bearing portion and contacting the bearing portion from the outer peripheral side.
According to the present invention, the reinforcing member having higher rigidity than the housing is provided in the housing. The reinforcing member includes a bearing reinforcing portion that contacts, from the outer peripheral side, a bearing portion of a housing that supports the output shaft. Thereby, the bearing portion is reinforced by the reinforcing member. Therefore, even in the case where a load is applied to the output shaft, deformation of the housing can be prevented or suppressed. Therefore, the output shaft can be prevented or suppressed from tilting.
In the present invention, the following can be formed: the bearing reinforcing portion is cylindrical, and the bearing portion includes a ring-shaped first protruding portion protruding from the bearing reinforcing portion in the first direction. If the bearing reinforcing portion is formed in a cylindrical shape, deformation of the bearing portion of the housing is easily suppressed, and therefore, inclination of the output shaft supported by the bearing portion is easily suppressed. Further, since the bearing portion of the housing includes the first projecting portion projecting in the first direction more than the bearing reinforcing portion, the bearing portion is easily lengthened in the axial direction. Therefore, the inclination of the output shaft supported by the bearing portion is easily suppressed.
In the present invention, the following can be formed: the output gear is fixed to the output shaft with the base portion inserted through the center hole, and includes an annular end surface facing the second direction on an outer peripheral side of the output shaft, the annular end surface facing the bearing portion in the axial direction. In this case, when the output shaft moves in the second direction in the axial direction, the annular end surface of the output gear fixed to the output shaft interferes with the bearing portion, and the output shaft can be prevented from moving excessively in the second direction.
In the present invention, the following can be formed: the output shaft includes a circular recess recessed in the second direction at an end surface in the first direction, the housing includes a support post portion inserted into the circular recess and rotatably supporting the output shaft, and the support post portion overlaps with the bearing portion and the bearing reinforcing portion when viewed in a direction orthogonal to the axis. Thus, the inclination of the output shaft is easily prevented.
In the present invention, the following can be formed: the transmission mechanism includes: a front section gear meshed with the output gear; and a support shaft extending in the axial direction and rotatably supporting the front-stage gear, wherein the reinforcing member includes a shaft holding portion that supports an end portion of the support shaft in the second direction. In this way, the reinforcing member reinforces the bearing portion that supports the output shaft to which the output gear is fixed, and supports the support shaft of the front stage gear that meshes with the output gear. Therefore, the front gear and the output gear can be prevented from being displaced in the direction of separating from each other by the load from the outside. Therefore, the meshing between the front gear and the output gear can be maintained in a normal state, and therefore, the transmission efficiency of the torque to the opening/closing member is not deteriorated.
In the present invention, the following can be formed: the output shaft and the housing are made of resin, and the reinforcing member is made of metal. Thus, the shapes of the output shaft and the housing can be easily set to desired shapes. In addition, the rigidity of the reinforcing member is easily made higher than that of the case. The bearing portion of the resin case supports a supported portion of the resin output shaft. Therefore, the sliding loss can be suppressed to be lower than in the case where the output shaft is supported by the metal reinforcing member.
In the present invention, the following can be formed: the output gear is made of metal. Thus, even if a load is applied to the output gear via the output shaft, the output gear can be prevented from being deformed.
Next, the toilet lid opening/closing unit according to the present invention is characterized by comprising the above opening/closing member driving device, wherein the opening/closing member is a toilet lid.
According to the present invention, the output shaft of the opening/closing member driving device to which the toilet lid is connected can be prevented from being inclined. Therefore, the toilet lid can be maintained in a state in which the toilet lid can be normally opened and closed.
Effects of the invention
According to the present invention, the bearing portion of the housing that supports the output shaft is reinforced by the reinforcing member having higher rigidity than the housing. Therefore, even in the case where a load is applied to the output shaft, deformation of the housing can be prevented or suppressed. Therefore, the output shaft can be prevented or suppressed from tilting.
Drawings
Fig. 1 is an external perspective view of an opening/closing member driving device.
Fig. 2 is an explanatory view of the toilet lid opening and closing unit.
Fig. 3 is a sectional view of the opening-closing member driving device.
Fig. 4 is an exploded perspective view of the opening/closing member driving device.
Fig. 5 is a perspective view of the motor, the transmission mechanism, and the output shaft when viewed from the other side in the axial direction.
Fig. 6 is a perspective view of the motor, the transmission mechanism, and the output shaft when viewed from one side in the axial direction.
Fig. 7 is an exploded perspective view of the output shaft, the output gear, the first assist spring, and the second assist spring as viewed from the other side in the axial direction.
Fig. 8 is an exploded perspective view of the output shaft, the output gear, the first assist spring, and the second assist spring when viewed from one side in the axial direction.
Fig. 9 is a perspective view of the middle housing as viewed from one side in the axial direction.
Fig. 10 is a perspective view of the second housing, the reinforcing member, the output shaft, and the output gear.
Detailed Description
Hereinafter, embodiments of the toilet lid opening and closing unit according to the present invention will be described with reference to the drawings.
(Overall Structure)
Fig. 1 is an external perspective view of an opening/closing member driving device. Fig. 2 is an explanatory view of the toilet lid opening and closing unit. Fig. 3 is a sectional view of the opening-closing member driving device. Fig. 4 is an exploded perspective view of the opening/closing member driving device. Fig. 5 is a perspective view of the motor, the transmission mechanism, and the output shaft when viewed from one side in the axial direction. Fig. 6 is a perspective view of the motor, the transmission mechanism, and the output shaft when viewed from the other side in the axial direction. Fig. 7 is an exploded perspective view of the output shaft, the output gear, the first assist spring, and the second assist spring when viewed from one side in the axial direction. Fig. 8 is an exploded perspective view of the output shaft, the output gear, the first assist spring, and the second assist spring as viewed from the other side in the axial direction. Fig. 9 is a perspective view of the middle housing as viewed from one side in the axial direction. Fig. 10 is an exploded perspective view of the second housing, the reinforcing member, the output shaft, and the output gear.
The opening/closing member driving device 1 shown in fig. 1 rotates an opening/closing member such as a cover or a door to open or close. The toilet lid opening/closing unit 3 is formed by connecting the toilet lid 201 of the toilet unit 200 as an opening/closing member to the opening/closing member driving device 1. Specifically, as shown in fig. 2, the toilet unit 200 includes a toilet main body 202, a toilet seat 203, a toilet lid 201, and a tank 204. The toilet lid 201 couples an end portion on the side of the case 204 to the output shaft 7 of the opening-closing member driving device 1. The toilet lid 201 is moved between a closed position where the lid is laid flat on the toilet main body 202 and an open position where the lid is raised from the toilet main body 202 by the rotation of the output shaft 7. The toilet unit 200 may be provided with a second opening/closing member driving device 1, and a toilet seat 203 as an opening/closing member may be coupled to the output shaft 7 of the second opening/closing member driving device 1.
As shown in fig. 3, the opening/closing member driving device 1 includes: a motor 6; an output shaft 7, the output shaft 7 is connected with a toilet cover 201; a transmission mechanism 8, the transmission mechanism 8 transmitting the driving force of the motor 6 to the output shaft 7; and a housing 9, the housing 9 accommodating the motor 6 and the transmission mechanism 8.
The output shaft 7 includes: a protruding portion 11, the protruding portion 11 protruding from the case opening 10 of the case 9; and a base 12, the base 12 being housed in the housing 9. An end of the toilet lid 201 is connected to the protruding portion 11 of the output shaft 7. Therefore, the opening/closing member driving device 1 opens and closes the toilet lid 201 in a cantilever state. As shown in fig. 1, the housing 9 has a shape elongated in one direction when viewed from a direction along the axis L of the output shaft 7. The output shaft 7 protrudes outward from the case 9 from the end portion in the longitudinal direction of the case 9.
In the following description, three directions orthogonal to each other are referred to as an X-axis direction, a Y-axis direction, and a Z-axis direction. The Z-axis direction is an axial direction along the axis L of the output shaft 7, the Y-axis direction is a longitudinal direction of the housing 9, and the X-axis direction is a short-side direction of the housing 9. In the Z-axis direction, the side from which the output shaft 7 protrudes is set as the + Z direction, and the opposite side is set as the-Z direction. One side in the X-axis direction is defined as the-X direction, and the other side is defined as the + X direction. One side in the Y-axis direction is set as the-Y direction, and the other side is set as the + Y direction. The output shaft 7 protrudes outward of the housing 9 from an end portion in the + Y direction in the Y axis direction in the housing 9. The direction around the axis L is a circumferential direction, and the direction perpendicular to the axis L is a radial direction.
(case and reinforcing Member)
The case 9 is made of resin. As shown in fig. 1, the housing 9 includes a first side wall 13 and a second side wall 14 extending parallel to the Y-axis direction. In addition, the housing 9 includes a third side wall 15, and the third side wall 15 extends in the X-axis direction and connects the-Y direction end of the first side wall 13 with the-Y direction end of the second side wall 14. Further, the housing 9 includes a fourth side wall 16 connecting the ends in the + Y direction. The fourth side wall 16 has a shape protruding in the + Y direction between the first side wall 13 and the second side wall 14.
Further, as shown in fig. 1 and 3, the housing 9 includes a first housing 21, an intermediate housing 22, and a second housing 23 arranged along the Z-axis direction. The first housing 21 is located in the-Z direction of the intermediate housing 22, and the second housing 23 is located in the + Z direction of the intermediate housing 22.
As shown in fig. 4, the first housing 21 includes: a bottom wall portion 25, the bottom wall portion 25 being an end surface of the case 9 in the-Z direction; and a first frame portion 26, the first frame portion 26 extending in the + Z direction from the outer peripheral edge of the bottom wall portion 25. The first frame portion 26 constitutes end portions in the-Z direction of the first side wall 13, the second side wall 14, the third side wall 15, and the fourth side wall 16 of the case 9. The motor 6 is fixed to the first housing 21. The motor 6 includes: a motor main body 28; a rotating shaft 27, the rotating shaft 27 protruding from the motor main body 28; and a pair of motor terminals 29, the motor terminals 29 protruding from the motor main body 28 to the side opposite to the rotation shaft 27. The output shaft 7 is located in the-Y direction of the motor main body 28. The rotation shaft 27 faces in a direction intersecting the axis L of the output shaft 7. In this example, the rotation shaft 27 faces in a direction orthogonal to the axis L of the output shaft 7. In addition, the rotation shaft 27 is inclined with respect to the Y-axis direction (longitudinal direction of the housing 9) when viewed from the Z-axis direction. The front end of the rotating shaft 27 is rotatably supported by a bearing member 30.
The intermediate housing 22 includes: a middle bottom 31; and a middle frame portion 32 extending in the + Z direction from the outer peripheral edge of the middle bottom portion 31. The middle frame portion 32 constitutes a middle portion in the Z-axis direction of the first side wall 13, the second side wall 14, the third side wall 15, and the fourth side wall 16 of the case 9. The intermediate housing 22 accommodates a part of the plurality of gears constituting the transmission mechanism 8.
A plate-shaped reinforcing member 35 is fixed to an end portion of the intermediate case 22 on the second case 23 side. The reinforcing member 35 is made of metal and has higher rigidity than the case 9. In this example, the reinforcing member 35 is a sheet metal member. The reinforcing member 35 is provided with a reinforcing member side opening 36. The output shaft 7 penetrates the reinforcing member side opening 36 in the Z-axis direction. A gap is provided between the reinforcing member side opening portion 36 and the output shaft 7 in the radial direction of the output shaft 7. The reinforcing member 35 includes a bearing reinforcing portion 24 protruding in the + Z direction from the opening edge of the reinforcing member side opening portion 36. The bearing reinforcing portion 24 is cylindrical. A potentiometer 37 is attached to the reinforcing member 35. The potentiometer 37 is located at an end portion on the opposite side to the output shaft 7 in the Y-axis direction.
The second case 23 (case portion) is plate-shaped, covers the reinforcing member 35 from the + Z direction, and is fixed to the intermediate case 22. The second case 23 covers the reinforcing member 35 from the + Z direction. The second housing 23 constitutes an end surface of the housing 9 in the + Z direction.
The second housing 23 includes a plate portion 17, and the plate portion 17 is an end surface of the housing 9 in the + Z direction. As shown in fig. 3 and 4, the plate portion 17 includes a plate portion through hole 17a penetrating the output shaft 7. In addition, the second housing 23 includes: a shaft support portion 18, the shaft support portion 18 protruding from an opening edge of the plate portion through hole 17a in the plate portion 17 in the + Z direction; and a bearing portion 19, the bearing portion 19 protruding from the opening edge of the plate portion through hole 17a in the plate portion 17 in the-Z direction. The plate portion through hole 17a, the shaft support portion 18, and the bearing portion 19 are provided coaxially. The output shaft 7 penetrates the plate portion through hole 17a, the shaft support portion 18, and the bearing portion 19 inside the housing 9, and protrudes outward from the housing opening 10, which is an end portion of the shaft support portion 18 in the + Z direction, toward the housing 9.
(output shaft)
The output shaft 7 is made of resin. The base portion 12 of the output shaft 7 is accommodated in the second housing 23 and the intermediate housing 22. As shown in fig. 7 and 8, the base portion 12 includes, in order from the-Z direction side toward the + Z direction side, a gear fixing portion 63, a bearing receiving portion 64, and a supported portion 68, the bearing receiving portion 64 having a circular outer peripheral surface facing radially outward, and the supported portion 68 having a circular outer peripheral surface facing radially outward. The bearing receiving portion 64 has an outer diameter larger than the outer diameters of the gear fixing portion 63 and the bearing receiving portion 68. The output gear 43 of the transmission mechanism 8 is coaxially fixed to the gear fixing portion 63. The supported portion 68 includes an annular groove 70 in the middle in the Z-axis direction. An O-ring 71 is attached to the annular groove 70.
As shown in fig. 8, the end surface of the output shaft 7 in the-Z direction includes a circular recess 62 recessed in the + Z direction. When viewed from the direction orthogonal to the axis L, the bottom surface of the circular recess 62 (the circular inner wall surface of the circular recess 62 in the + Z direction) overlaps the bearing-receiving portion 64.
(transfer mechanism)
As shown in fig. 5 and 6, the transmission mechanism 8 includes a worm 38, a first gear 39, a second gear 40, a third gear 41, a fourth gear 42 (front gear), and an output gear 43, from the upstream side toward the downstream side of the drive force transmission path from the motor 6 to the output shaft 7. The worm 38 is fixed to the outer peripheral side of the rotating shaft 27. The worm 38 and the first gear 39 are located within the first housing 21. The second gear 40, the third gear 41, the fourth gear 42, and the output gear 43 are located within the intermediate housing 22.
The first gear 39 is located in the + X direction of the rotation shaft 27 of the motor 6. The first gear 39 includes a first large-diameter gear 39a and a first small-diameter gear 39b, the first large-diameter gear 39a is engaged with the worm 38, and the first small-diameter gear 39b is coaxial with the first large-diameter gear 39a and has a smaller outer diameter than the first large-diameter gear 39 a. The first large-diameter gear 39a is located in the-Z direction of the first small-diameter gear 39 b. The first gear 39 is rotatably supported by a first support shaft 45 extending in the Z-axis direction. the-Z direction end portion of the first support shaft 45 is held by the bottom wall portion 25 of the first housing 21, and the + Z direction end portion is held by the intermediate bottom portion 31 of the intermediate housing 22. As shown in fig. 3, the first gear 39 includes a torque limiter 46 that turns on and off transmission of the driving force between the first large-diameter gear 39a and the first small-diameter gear 39 b.
The second gear 40 includes a second large-diameter gear 40a and a second small-diameter gear 40b, the second large-diameter gear 40a is meshed with the first small-diameter gear 39b, and the second small-diameter gear 40b is coaxial with the second large-diameter gear 40a and has a smaller outer diameter than the second large-diameter gear 40 a. The second large diameter gear 40a is located in the-Z direction of the second small diameter gear 40 b. The second large-diameter gear 40a meshes with the first small-diameter gear 39b via the intermediate case opening 33 provided in the intermediate bottom portion 31 of the intermediate case 22 (see fig. 3 and 9). The second gear 40 is rotatably supported by a second support shaft 48 extending in the Z-axis direction. The end portion of the second fulcrum 48 in the-Z direction is held by the intermediate bottom 31 of the intermediate case 22, and the end portion in the + Z direction is held by the reinforcing member 35.
The third gear 41 includes a third large diameter gear 41a and a third small diameter gear 41b, the third large diameter gear 41a is engaged with the second small diameter gear 40b, and the third small diameter gear 41b is coaxial with the third large diameter gear 41a and has a smaller outer diameter than the third large diameter gear 41 a. The third large-diameter gear 41a is located in the-Z direction of the third small-diameter gear 41 b. The third gear 41 is rotatably supported by a third support shaft 49 extending in the Z-axis direction. The end portion of the third fulcrum 49 in the-Z direction is held by the intermediate bottom 31 of the intermediate case 22, and the end portion in the + Z direction is held by the second case 23. The third fulcrum 49 penetrates the reinforcing member 35.
The fourth gear 42 is a spur gear that meshes with the third small-diameter gear 41b and the output gear 43. The fourth gear 42 and the output gear 43 are aligned in the Y-axis direction. The fourth gear 42 is disposed coaxially with the second gear 40 and is rotatably supported by the second support shaft 48. As shown in fig. 3, the end portion of the second fulcrum 48 in the-Z direction is held by the intermediate case 22, and the end portion in the + Z direction is held by the reinforcing member 35. That is, as shown in fig. 9, the intermediate bottom portion 31 of the intermediate housing 22 includes a shaft holding portion 34 that holds a second support shaft 48 that supports the second gear 40 and the fourth gear 42. As shown in fig. 4, the reinforcing member 35 includes a shaft holding portion 47 that holds a second fulcrum shaft 48 that supports the second gear 40 and the fourth gear 42.
The output gear 43 is made of metal. The output gear 43 is coaxially fixed to the gear fixing portion 63 of the output shaft 7. That is, as shown in fig. 7 and 8, the output gear 43 is annular, and the gear fixing portion 63 of the output shaft 7 is inserted into the center hole thereof. A plurality of recesses 51 are circumferentially provided on the inner peripheral surface of the output gear 43, and a plurality of protrusions 52 are provided on the outer peripheral surface of the gear fixing portion 63 of the output shaft 7, and the protrusions 52 are fitted into the recesses 51 on the inner peripheral surface of the output gear 43. Thereby, the output gear 43 and the output shaft 7 are coupled together in a state of being relatively non-rotatable about the axis L.
Here, the transmission mechanism 8 includes a first assist spring 53 and a second assist spring 54. The first assist spring 53 and the second assist spring 54 are both coil springs.
The first assist spring 53 is located in the-Z direction of the output gear 43. The first assist spring 53 is placed on the intermediate bottom 31 of the intermediate housing 22. the-Z-direction end portion 53a of the first assist spring 53 extends in the-Z direction. the-Z-direction end portion 53a of the first auxiliary spring 53 protrudes in the-Z direction from the through hole 55 provided in the intermediate bottom portion 31 of the intermediate case 22, and is engaged with the first auxiliary spring first engaging portion 56 provided in the first case 21 (see fig. 4). The end portion 53b of the first assist spring 53 in the + Z direction extends in the + Z direction, and is inserted into a first assist spring second engaging portion 57 provided on the outer peripheral surface of the output gear 43 so as to be engageable therewith. The first auxiliary spring second locking portion 57 is a notched portion provided in the tooth portion of the output gear 43. The + Z direction end portion 53b of the first auxiliary spring 53 can abut against the output gear 43 from the circumferential direction. The first auxiliary spring 53 is rectangular in cross section.
The second auxiliary spring 54 is located on the inner peripheral side of the first auxiliary spring 53. The second assist spring 54 is placed on the intermediate bottom 31 of the intermediate housing 22. The second assist spring 54 is located in the-Z direction of the output shaft 7. the-Z-direction end portion 54a of the second auxiliary spring 54 extends toward the inner peripheral side of the second auxiliary spring 54. the-Z-direction end portion 54a of the second auxiliary spring 54 is engaged with a second auxiliary spring first engaging portion 58 provided in a support post portion 61 protruding in the + Z direction from the intermediate bottom portion 31 of the intermediate case 22 (see fig. 9). The end portion 54b of the second assist spring 54 in the + Z direction extends in the + Z direction and is locked by a second assist spring second locking portion 59 (see fig. 8) provided on the other end surface of the output shaft 7 in the Z axis direction. The second auxiliary spring second locking portion 59 is a circular hole formed in the-Z direction end surface of the gear fixing portion 63.
(supporting structure of output shaft)
Here, as shown in fig. 3, the output shaft 7 is rotatably supported by a support column portion 61 protruding in the + Z direction from the intermediate bottom portion 31 of the intermediate case 22. The pillar portion 61 is located on the inner peripheral side of the first auxiliary spring 53 and the second auxiliary spring 54. The support post portion 61 protrudes in the + Z direction more than the first assist spring 53 and the second assist spring 54. The front end side of the support post 61 is inserted into the circular recess 62 of the output shaft 7. The tip of the pillar portion 61 contacts the bottom surface of the circular recess 62 (the circular inner wall surface of the circular recess 62 in the + Z direction).
As shown in fig. 3 and 10, the supported bearing portion 64 of the output shaft 7 is rotatably supported from the outer peripheral side by the bearing portion 19 of the second housing 23. When viewed from the direction orthogonal to the axis L, the + Z direction end 61a of the pillar portion 61 overlaps the bearing portion 19. The supported portion 68 of the output shaft 7 is rotatably supported from the outer peripheral side by the shaft support portion 18 of the second housing 23. The O-ring 71 fixed to the supported portion 68 is compressed in the radial direction between the output shaft 7 and the shaft supporting portion 18.
The bearing portion 19 of the second housing 23 is surrounded from the outer peripheral side by the bearing reinforcing portion 24 of the reinforcing member 35. The bearing reinforcing portion 24 is in contact with the bearing portion 19 from the outer peripheral side of the bearing portion 19 over the entire circumference of the bearing portion 19. When viewed from the direction orthogonal to the axis L, the + Z direction end portion of the pillar portion 61 overlaps the bearing portion 19 and the bearing reinforcing portion 24. In this example, as shown in fig. 3, in a state where the bearing reinforcing portion 24 is in contact with the bearing portion 19, the bearing portion 19 includes a ring-shaped first protruding portion 19a and a ring-shaped second protruding portion 19b, the first protruding portion 19a protruding from the bearing reinforcing portion 24 in the-Z direction, and the second protruding portion 19b protruding from the bearing reinforcing portion 24 in the + Z direction. The first projecting portion 19a is opposed to an annular end surface of the output gear 43 facing the + Z direction on the outer peripheral side of the base 12 in the Z-axis direction.
(fixing Structure of reinforcing Member)
Here, the reinforcing member 35 is fixed to the intermediate housing 22 between the bearing reinforcing portion 24 and the shaft holding portion 47 in the Y-axis direction.
That is, as shown in fig. 9, the intermediate case 22 has a first protrusion 73 and a second protrusion 74 protruding toward the inner peripheral side in the first frame portion 32a and the second frame portion 32b of the intermediate frame portion 32 extending in parallel in the Y axis direction, respectively. The first projection 73 and the second projection 74 are provided with screw holes, respectively. Further, the first frame portion 32a includes a rectangular first notch portion 32c at a position where the first protrusion 73 is provided. The second frame portion 32b includes a rectangular second notched portion 32d at a position where the second protrusion 74 is provided. The first projection 73 and the second projection 74 are opposed in the X-axis direction.
In contrast, as shown in fig. 4, the reinforcing member 35 includes a pair of protruding portions 35b and 35c protruding to both sides in the X-axis direction between the bearing reinforcing portion 24 and the shaft holding portion 47 in the Y-axis direction. The protruding portions 35b and 35c are provided with through grooves. The protrusion 35b of the reinforcing member 35 in the-X direction is inserted into the first notch 32c of the first frame portion 32a from the + Z direction, and abuts against the first protrusion 73. The protrusion 35c of the reinforcing member 35 in the + X direction is inserted into the second notch 32d of the second frame portion 32b from the + Z direction, and abuts against the second protrusion 74. Then, the reinforcing member 35 is fixed to the intermediate case 22 by screws 75 inserted through the second case 23 and further inserted through the through grooves of the protruding portions 35b and screwed into the screw holes of the first protrusions 73. The reinforcing member 35 is fixed to the middle case 22 by screws 75 inserted through the through grooves of the second case 23 and the protruding portion 35c and screwed into the screw holes of the second protruding portion 74.
In a state where the reinforcing member 35 is fixed to the intermediate case 22, a gap 76 is partially provided between the reinforcing member 35 and the first frame portion 32a, and a gap 77 is partially provided between the reinforcing member 35 and the second frame portion 32 b. That is, in a state where the reinforcing member 35 is fixed to the housing 9, a portion (gap 76) that does not contact each other is provided between the reinforcing member 35 and the first side wall 13. In addition, a portion (gap 77) that does not contact each other is provided between the reinforcing member 35 and the second side wall 14.
(potentiometer)
Next, as shown in fig. 5, the potentiometer 37 includes a potential gear 81 that meshes with any one of a plurality of gears constituting the transmission mechanism 8. As shown in fig. 4, the potentiometer 37 includes a detection unit 82 that detects the rotational angle position of the potential gear 81. The potential gear 81 is located in the-Z direction of the reinforcing member 35 and meshes with the third small-diameter gear 41b of the third gear 41. The detection portion 82 is fixed to the reinforcing member 35 via a substrate 83. Here, a wiring (not shown) for supplying electric power to the motor 6 is connected between the substrate 83 and the pair of motor terminals 29. A plurality of terminal pins 86 connected to the wiring and the potentiometer 37 are fixed to the substrate 83. The intermediate housing 22 has a terminal pin holding portion 87 at an end portion of one side Y1 in the Y axis direction of the intermediate frame portion 32.
(action)
When the motor 6 is driven in the forward direction or the reverse direction by supplying electric power through the terminal pin 86, the driving force of the motor 6 is transmitted to the output shaft 7 through the transmission mechanism 8. Therefore, as shown in fig. 2, the toilet lid 201 fixed to the output shaft 7 rotates in the closing direction a toward the closed position or the opening direction B toward the open position. When the toilet lid 201 is rotated, a signal corresponding to the rotational angle position of the toilet lid 201 is output from the potentiometer 37.
When the toilet lid 201 connected to the output shaft 7 rotates in the closing direction a, the first assist spring 53 and the second assist spring 54 accumulate a biasing force for rotating the output shaft 7 in the opening direction B about the axis L. Therefore, when the toilet lid 201 is rotated in the opening direction B, the first assist spring 53 and the second assist spring 54 urge the output shaft 7 driven in the opening direction B. Further, the transmission mechanism 8 includes a torque limiter 46 in the first gear 39. Therefore, when an excessive load is applied to the transmission mechanism 8 from the toilet lid 201 via the output shaft 7, the torque limiter 46 acts to cut off the transmission of the driving force by the transmission mechanism 8. This prevents the transmission mechanism 8 from being damaged by an excessive external load.
(Effect)
According to this example, the case 9 has a reinforcing member 35 having higher rigidity than the case 9. The reinforcing member 35 includes a bearing reinforcing portion 24 that contacts the bearing portion 19 of the housing 9 that supports the output shaft 7 from the outer peripheral side. Thereby, the bearing portion 19 of the housing 9 is reinforced by the reinforcing member 35. Therefore, even in the case where a load is applied to the output shaft 7, deformation of the housing 9 can be prevented or suppressed. Therefore, the output shaft 7 of the bearing portion 19 supported by the housing 9 can be prevented or suppressed from tilting.
Further, in this example, the bearing reinforcing portion 24 is cylindrical, and the bearing portion 19 includes an annular first projecting portion 19a projecting in the-Z direction from the bearing reinforcing portion 24. If the bearing reinforcing portion 24 is formed in a cylindrical shape, the bearing portion 19 of the housing 9 is easily prevented from being deformed, and therefore, the inclination of the output shaft 7 supported by the bearing portion 19 is easily prevented. Further, since the bearing portion 19 protrudes in the Z-axis direction than the bearing reinforcing portion 24, the bearing portion 19 is easily lengthened in the Z-axis direction. Therefore, the inclination of the output shaft 7 supported by the bearing 19 is easily suppressed.
In addition, the first protruding portion 19a of the bearing portion 19 faces the annular end surface of the output gear 43 facing the + Z direction on the outer peripheral side of the base portion 12 in the Z-axis direction. Therefore, when the output shaft 7 moves in the + Z direction, the annular end surface of the output gear 43 fixed to the output shaft 7 interferes with the bearing portion 19, and the output shaft 7 can be prevented from excessively moving in the + Z direction.
In this example, the high-rigidity reinforcing member 35 reinforces the bearing portion 19 that supports the output shaft 7 to which the output gear 43 is fixed, and supports the second support shaft 48 of the fourth gear 42 that meshes with the output gear 43. Thereby, the fourth gear 42 and the output gear 43 can be prevented from being displaced in the direction of separating from each other by the load from the outside, and therefore, the engagement of the fourth gear 42 and the output gear 43 can be maintained in a normal state. Therefore, the transmission efficiency of the torque to the toilet lid 201 is not deteriorated.
The output shaft 7 has a circular recess 62 recessed toward the other side on the end surface in the-Z direction, and the housing 9 includes a support post 61 inserted into the circular recess 50 and rotatably supporting the output shaft 7 and the output gear 43. Then, when viewed from the direction orthogonal to the axis L, the + Z direction end portion of the column portion 61 overlaps the bearing portion 19 and the bearing reinforcing portion 24. Therefore, the inclination of the output shaft 7 is easily prevented.
The output shaft 7 and the housing 9 are made of resin, and the reinforcing member 35 is made of metal. Therefore, the rigidity of the reinforcing member 35 is improved with respect to the housing 9. Further, since the output shaft 7 and the housing 9 are made of resin, it is easy to form the shapes thereof into desired shapes. Further, since the supported bearing portion 64 of the resin output shaft 7 is rotatably supported by the bearing portion 19 of the resin case 9, the sliding loss can be suppressed to be low as compared with a case where the output shaft 7 is directly supported by the metal reinforcing member 35, for example.
The output gear 43 is made of metal. Therefore, even when a load is applied to the output gear 43 via the output shaft 7, the output gear 43 can be prevented from being deformed.
In this example, the output gear 43 and the fourth gear 42 are aligned in the Y-axis direction, and the reinforcing member 35 is fixed to the housing 9 between the bearing reinforcing portion 24 and the shaft holding portion 47 in the Y-axis direction. That is, the pair of protruding parts 35b, 35c of the reinforcing member 35 between the bearing reinforcing member 24 and the shaft holding portion 47 in the Y-axis direction is fixed to the housing 9. Thereby, the reinforcing member 35 is fixed to the housing 9 at a position close to the output gear 43. Therefore, when a load is applied to the output gear 43 via the output shaft 7, the reinforcing member 35 can be prevented from flexing.
Further, the housing 9 includes a first side wall 13 and a second side wall 14 aligned in the X-axis direction and extending parallel to the Y-axis direction. The reinforcing member 35 is disposed between the first side wall 13 and the second side wall 14, a gap 76 is partially provided between the reinforcing member 35 and the first side wall 13, and a gap 77 is partially provided between the reinforcing member 35 and the second side wall 14. In this way, since the reinforcing member 35 and the housing 9 have portions that do not contact each other, the transmission of the load applied to the reinforcing member 35 from the output gear 43 via the output shaft 7 to the housing 9 can be suppressed.
Here, according to the toilet lid opening/closing unit 3 of this example, the output shaft 7 of the opening/closing member driving device 1 to which the toilet lid 201 is connected does not tilt. Therefore, the toilet lid 201 can be maintained in a state in which it can be normally opened and closed.
Description of the symbols
1 opening/closing member drive device, 3 toilet lid opening/closing unit, 6 motor, 7 output shaft, 8 transmission mechanism, 9 casing, 10 casing opening, 11 projecting portion, 12 base portion, 13 first side wall, 14 second side wall, 15 third side wall, 16 fourth side wall, 17 plate portion, 18 shaft support portion, 19 bearing portion, 21 first casing, 22 intermediate casing, 23 second casing, 24 bearing reinforcing portion, 25 bottom wall portion, 26 frame portion, 27 rotating shaft, 28 motor main body, 29 motor terminal, 30 bearing member, 31 intermediate bottom portion, 32 intermediate frame portion, 32a first frame portion, 32b second frame portion, 32c first cutout portion, 32d second cutout portion, 33 intermediate casing opening portion, 34 shaft holding portion, 35 reinforcing member, 35a end face, 35b, 35c … protrusion, 36 … reinforcing member side opening, 37 … potentiometer, 38 … worm, 39 … first gear, 39a … first large diameter gear, 39b … first small diameter gear, 40 … second gear, 40a … second large diameter gear, 40b … second small diameter gear, 41 … third gear, 41a … third large diameter gear, 41b … third small diameter gear, 42 … fourth gear, 43 … output gear, 43a … annular part, 45 … first fulcrum shaft, 46 … torque limiter, 47, … shaft holding part, 48 … second fulcrum shaft, 49 … third fulcrum shaft, 50 … circular recess, 51 … recess, 52 … protrusion, 53 … first auxiliary spring, 53a … first auxiliary spring side end part, 53b … first auxiliary spring side end part, 54 second auxiliary spring side part, 54a … side auxiliary spring side end part, 55 … through hole, 56 … first auxiliary spring first locking portion, 57 … first auxiliary spring second locking portion, 58 … second auxiliary spring first locking portion, 59 … second auxiliary spring second locking portion, 61 … pillar portion, 62 … circular recess, 68 … supported portion, 70 … annular groove, 71 … O ring, 73 … first protrusion, 74 … second protrusion, 76 … gap, 77 … gap, 81 … potential gear, 82 … detecting portion, 83 … base plate, 86 … terminal pin, 87 … terminal pin holding portion, 200 … toilet unit, 201 … toilet cover, 202 … toilet main body, 203 … toilet seat, 204 … tank, X … third direction (short side direction of casing), Y … second direction (long side direction of casing), Z … first direction (axial direction).
Claims (8)
1. An opening-closing member driving device characterized by comprising:
a motor;
an output shaft connected to the opening and closing member;
a transmission mechanism that transmits a driving force of the motor to the output shaft;
a housing that houses the motor and the transmission mechanism; and
a reinforcing member having higher rigidity than the housing and fixed to an inner side of the housing,
when a direction along an axis of the output shaft is an axial direction, one side of the axial direction is a first direction, and the other side is a second direction, the output shaft includes: a base located within the housing; and a protruding portion protruding from the housing in the second direction of the base portion,
the transmission mechanism includes an output gear coaxially fixed to a base of the output shaft,
the case includes a case portion that covers the reinforcing member from one side in the second direction,
the housing portion includes: an opening portion through which the output shaft penetrates from an inner side to an outer side of the housing; and a cylindrical bearing portion extending coaxially with the opening portion inside the housing,
the output shaft includes a supported portion having a circular outer peripheral surface in the second direction of the output gear at the base portion,
the bearing portion rotatably supports the bearing-receiving portion from an outer peripheral side,
the reinforcing member has a bearing reinforcing portion surrounding the bearing portion and contacting the bearing portion from an outer peripheral side.
2. The opening-closing member driving device according to claim 1,
the bearing reinforcing portion is cylindrical in shape,
the bearing portion has an annular first protruding portion protruding from the bearing reinforcing portion in the first direction.
3. The opening-closing member driving device according to claim 2,
the output gear is fixed to the output shaft with the base portion penetrating through the center hole, the output gear includes an annular end surface facing the second direction on an outer peripheral side of the output shaft,
the annular end surface is opposed to the bearing portion in the axial direction.
4. The opening-closing member driving device according to claim 2 or 3,
the output shaft includes a circular recess portion whose end surface in the first direction is recessed toward the second direction,
the housing includes a support column part inserted into the circular recess and rotatably supporting the output shaft,
the pillar portion overlaps with the bearing portion and the bearing reinforcing portion when viewed from a direction orthogonal to the axis.
5. The opening-closing member driving device according to any one of claims 1 to 4,
the transmission mechanism includes: a front section gear meshed with the output gear; and a support shaft extending in the axial direction and rotatably supporting the front-stage gear,
the reinforcing member includes a shaft holding portion that supports an end portion of the fulcrum shaft in the second direction.
6. The opening-closing member driving device according to any one of claims 1 to 5,
the output shaft and the housing are made of resin,
the reinforcing member is made of metal.
7. The opening-closing member driving device according to any one of claims 1 to 6,
the output gear is made of metal.
8. A toilet lid opening/closing unit is characterized in that,
having the opening-closing member driving device according to any one of claims 1 to 7,
the opening and closing member is a toilet lid.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2019205222A JP7325304B2 (en) | 2019-11-13 | 2019-11-13 | Opening/closing member driving device and toilet lid opening/closing unit |
| JP2019-205222 | 2019-11-13 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112790653A true CN112790653A (en) | 2021-05-14 |
| CN112790653B CN112790653B (en) | 2022-07-01 |
Family
ID=75806133
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011270050.3A Active CN112790653B (en) | 2019-11-13 | 2020-11-13 | Opening/closing member drive device and toilet lid opening/closing unit |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP7325304B2 (en) |
| CN (1) | CN112790653B (en) |
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Also Published As
| Publication number | Publication date |
|---|---|
| JP2021078308A (en) | 2021-05-20 |
| CN112790653B (en) | 2022-07-01 |
| JP7325304B2 (en) | 2023-08-14 |
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