JP2015055310A - Power window drive mechanism and torque limiter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a power window drive mechanism and a torque limiter, which enhance the function of stopping rise of a window when a foreign matter is caught between the window and a window frame.SOLUTION: A power window drive mechanism (100b) of the invention comprises: a power transmission member which is rotated by driving force of a motor (101) and around which a wire is wound for elevating and lowering a window; and a torque limiter (10) which is disposed in a power transmission path from the motor (101) to the power transmission member and cuts off transmission of the driving force from the motor (101) when an overload is applied. The torque limiter (10) includes: a permanent magnet (13) which is fixed to one of a cylindrical outer peripheral part of a first rotor and a cylindrical inner peripheral part of a second rotor; and a hysteresis member (14) which is fixed to the other of the cylindrical outer peripheral part of the first rotor and the cylindrical inner peripheral part of the second rotor and generates hysteresis torque with the permanent magnet (13).

Description

  The present invention relates to a power window drive mechanism and a torque limiter.

  The vehicle is provided with a power window driving mechanism that moves the window up and down by a switch operation using the driving force of the motor. In such a power window drive mechanism, an accident has occurred in which a child or the like riding on a vehicle is injured with a finger or neck sandwiched between the window and the window frame when the window is raised. For this reason, the power window drive mechanism is required to have a function of preventing foreign matter from being caught between the window and the window frame during the switch operation. Examples of such a technique include JP-A-8-93877 (Patent Document 1) and JP-A 2000-92782 (Patent Document 2).

  Patent Document 1 discloses a bidirectional torque limiter that is incorporated in a power window driving mechanism of an automobile and interrupts transmission of torque between the motor and the window when a load exceeding a limit value is applied. This bidirectional torque limiter is provided with an outer cylinder rotatably provided on the outer side of the inner cylinder, an intermediate cylinder rotating with the outer cylinder between both cylinders, and having an inner diameter surface in contact with the outer diameter surface of the inner cylinder. The coil spring is formed between the intermediate cylinder and the outer cylinder, one end of the coil spring is connected to the outer cylinder, and the other end is connected to the opening end of the outer cylinder. It is connected to a lid that is press-fit for rotation. When the sum of the torque acting on the inner cylinder and the magnitude of the torque acting as a load on the outer cylinder exceeds the limit value, a slip occurs between the outer diameter surface of the inner cylinder and the inner cylinder inner diameter surface. The rotation is cut off.

  In Patent Document 2, in a motor for a power window device for transmitting a driving force of a motor to an output shaft and driving the power window device by the output shaft, a drive gear, a buffer spring, and a torque limiter mechanism are provided. It is disclosed that it is provided. The drive gear is connected to the rotating shaft. A buffer spring is arrange | positioned between a drive gear and an output shaft, connects both, and buffers the transmission load between both. The torque limiter mechanism is provided in parallel with the buffer spring between the drive gear and the output shaft, and normally transmits the drive force of the drive gear to the output shaft as it is, and transmits a drive force of a predetermined value or more. Cut off. The torque limiter mechanism is composed of a friction plate. When the load on the output shaft exceeds a predetermined value, the friction plate rotates relative to the drive gear, and transmission of the drive force from the drive gear to the output shaft is interrupted. At the same time, a load on the output shaft acts on a buffer spring provided in parallel with the friction plate, and the load is sandwiched and absorbed by the buffer spring.

JP-A-8-93877 JP 2000-92782 A

  In Patent Document 1, when a load exceeding a predetermined value is applied, a slip is generated between the inner cylinder and the coil spring to interrupt transmission of torque to the outer cylinder. In Patent Document 2, when a load exceeding a predetermined value is applied, transmission of the driving force from the driving gear to the output shaft is blocked by the friction plate constituting the torque limiter mechanism.

  As described above, in Patent Documents 1 and 2, when a foreign object is caught between the window and the window frame during the switch operation, the coil is prevented from rising by using the coil spring or the friction plate. . However, if the operation of moving the window up and down is repeated, the coil spring and the friction plate are worn, and therefore, when a foreign object is caught, the torque limiter may not function sufficiently.

  In view of the above-described problems, an object of the present invention is to provide a power window driving mechanism and a torque limiter that enhance a function of stopping the rising of a window when a foreign object is caught between the window and the window frame. .

  The power window drive mechanism of the present invention is disposed in a motor, a power transmission member that is rotated by the driving force of the motor to raise and lower the window, and a power transmission path from the motor to the power transmission member, and is overloaded. A torque limiter that cuts off transmission of the driving force from the motor, and the torque limiter has a first rotating body having a cylindrical outer peripheral portion, and a cylindrical inner peripheral portion facing the cylindrical outer peripheral portion, A second rotating body provided coaxially relative to the first rotating body, a cylindrical permanent magnet fixed to one of the cylindrical outer peripheral portion and the cylindrical inner peripheral portion, and the cylindrical outer peripheral portion And a cylindrical hysteresis material that is fixed to the other of the cylindrical inner peripheral portion and generates a hysteresis torque with the permanent magnet.

  Preferably, the power window driving device of the present invention further includes a one-way clutch provided between the cylindrical outer peripheral portion and the cylindrical inner peripheral portion and relatively rotatable only in one direction.

  In the power window driving device of the present invention, the power transmission path includes a motor shaft connected to the motor and a worm to which the rotation of the motor is transmitted via the motor shaft, and the first rotating body and the second rotating body. One of these may be fixed to the motor shaft, and the other of the first rotating body and the second rotating body may be fixed to the worm.

  In the power window driving device of the present invention, the power transmission path includes a worm to which rotation is transmitted via a motor, and a worm wheel meshing with the worm, and the first rotating body is coupled to the power transmission member. The second rotating body may be fixed to the worm wheel.

  In the power window driving device of the present invention, the power transmission path includes a worm to which rotation is transmitted via a motor, and a worm wheel meshing with the worm, and the first rotating body is connected to the worm wheel. The second rotating body may be fixed to the power transmission member.

  A torque limiter according to the present invention is a torque limiter used in a power window driving mechanism that rotates a power transmission member that raises and lowers a window by a driving force of a motor, and includes a first rotating body having a cylindrical outer peripheral portion, and a cylindrical outer peripheral Fixed to one of the cylindrical outer peripheral part and the cylindrical inner peripheral part, having a cylindrical inner peripheral part opposite to the first rotary body and provided rotatably relative to the first rotary body. And a cylindrical hysteresis material that is fixed to the other of the cylindrical outer peripheral portion and the cylindrical inner peripheral portion and generates a hysteresis torque between the permanent magnet and the permanent magnet.

  Preferably, the torque limiter of the present invention further includes a one-way clutch that is provided between the cylindrical outer peripheral portion and the cylindrical inner peripheral portion and is relatively rotatable only in one direction.

  ADVANTAGE OF THE INVENTION According to this invention, when a foreign material is pinched | interposed between a window and a window frame, the power window drive mechanism and torque limiter which improve the function which stops a raise of a window can be provided.

It is sectional drawing which shows schematically the torque limiter in Embodiment 1 of this invention. It is a schematic diagram which shows the power window drive mechanism in Embodiment 1 of this invention. It is a perspective view which shows roughly the motor unit and worm wheel vicinity which comprise the power window drive mechanism in Embodiment 1 of this invention. It is a schematic diagram which shows the torque limiter vicinity which comprises the power window drive mechanism in Embodiment 1 of this invention. It is a perspective view which shows roughly the torque limiter vicinity which comprises the power window drive mechanism in Embodiment 1 of this invention. It is a schematic diagram which shows the torque limiter vicinity which comprises the power window drive mechanism in Embodiment 2 of this invention. It is a schematic diagram which shows the torque limiter vicinity which comprises the power window drive mechanism in the modification of Embodiment 2 of this invention. It is a schematic diagram which shows the torque limiter vicinity which comprises the power window drive mechanism in Embodiment 3 of this invention. It is a schematic diagram which shows the torque limiter vicinity which comprises the power window drive mechanism in Embodiment 4 of this invention.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the following drawings, the same or corresponding parts are denoted by the same reference numerals, and description thereof will not be repeated.

(Embodiment 1)
A power window driving mechanism and a torque limiter according to an embodiment of the present invention will be described with reference to FIGS. First, the torque limiter according to the first embodiment of the present invention will be described.

  The torque limiter according to the embodiment of the present invention is a torque limiter used in a power window drive mechanism that rotates a power transmission member that raises and lowers a window by a driving force of a motor, and more specifically, a wire that raises and lowers a window. It is a torque limiter used in a power window drive mechanism that rotates a wound power transmission member by a driving force of a motor. As shown in FIG. 1, the torque limiter 10 includes a first rotating body 11, a second rotating body 12, a permanent magnet 13, a hysteresis material 14, a lid portion 15, and a one-way clutch 16.

  The first rotating body 11 has a cylindrical center hole 11a and a cylindrical outer peripheral portion 11b. Moreover, the 1st rotary body 11 has the reduction | decrease part 11c formed in the both ends, and the cylindrical expansion part 11d which was formed in the center part and expanded the diameter rather than the reduction | decrease part 11c.

  The second rotating body 12 is provided so as to be relatively rotatable on the same axis as the first rotating body 11. The second rotary body 12 has an opening 12a formed in the upper portion and a cylindrical inner peripheral portion 12b facing the cylindrical outer peripheral portion 11b. Moreover, the 2nd rotary body 12 has the bottom part 12c formed in the opposite side to the opening part 12a.

  The permanent magnet 13 is fixed to the cylindrical outer peripheral portion 11 b of the first rotating body 11. The hysteresis material 14 is fixed to the cylindrical inner peripheral portion 12 b of the second rotating body 12. The permanent magnet 13 and the hysteresis material 14 are cylindrical. The cylindrical outer peripheral part of the permanent magnet 13 and the cylindrical inner peripheral part of the hysteresis material 14 are arranged so that a gap is provided. Torque between the first rotating body 11 and the second rotating body 12 is transmitted by a hysteresis torque generated between the permanent magnet 13 and the hysteresis material 14.

  The permanent magnet 13 may be fixed to the cylindrical inner peripheral portion 12 b of the second rotating body 12, and the hysteresis material 14 may be fixed to the cylindrical outer peripheral portion 11 b of the first rotating body 11.

  The lid 15 is attached to the opening 12 a of the second rotating body 12. The lid portion 15 has a ring shape.

  The one-way clutch 16 is provided between the cylindrical outer peripheral portion 11 b of the first rotating body 11 and the cylindrical inner peripheral portion 12 b of the second rotating body 12. In the present embodiment, the sliding part between the cylindrical outer peripheral part of the upper part of the reducing part 11c of the first rotating body 11 and the lid part 15 and the cylindrical part of the lower part of the reducing part 11c of the first rotating body 11 are used. A one-way clutch 16 is provided at a sliding portion between the outer peripheral portion and the bottom portion 12 c of the second rotating body 12.

  The one-way clutch 16 is relatively rotatable only in one direction. That is, the one-way clutch 16 is a restricting unit that allows relative rotation in one direction and restricts relative rotation in the other direction. In the present embodiment, the one-way clutch 16 allows rotation in the direction in which the window is raised (closed) and restricts rotation in the direction in which the window is lowered (opened).

  Next, the power window drive mechanism of this embodiment will be described. As shown in FIGS. 2 to 5, the power window drive mechanism 100 a includes the torque limiter 10, the motor 101, the motor shaft 102, the worm 103, the worm wheel 104, the shaft 105, and the power transmission member 106 described above. A wire 107, a pulley 108, a guide rail 109, and a carrier plate 110.

  The motor 101 is a drive source. A motor shaft 102 is connected to the motor 101. The motor shaft 102 is rotated by the driving force of the motor 101. The rotation of the motor 101 is transmitted to the worm 103 connected to the motor shaft 102 via the motor shaft 102. A worm wheel 104 is provided so as to mesh with the worm 103. The worm wheel 104 is transmitted with the rotation of the worm 103. The worm wheel 104 and the shaft 105 are connected. The shaft 105 rotates as the worm wheel 104 rotates.

  A power transmission member 106 is connected to the shaft 105. A guide groove for passing the wire 107 is formed in the power transmission member 106, and the wire 107 for raising and lowering the window is wound around the power transmission member 106. The power transmission member 106 rotates with the rotation of the shaft 105 and moves the wire 107. As described above, the power transmission member 106 is rotated by the driving force of the motor 101.

  A pulley 108 is provided so as to rotate as the wire 107 moves. The pulley 108 is attached to both ends of the guide rail 109. A carrier plate 110 is attached to the guide rail 109 so as to be movable in the vertical direction. A window is attached to the carrier plate 110.

  The torque limiter 10 is disposed in the power transmission path R from the motor 101 to the power transmission member 106, and interrupts transmission of driving force from the motor 101 when an overload is applied. As shown in FIG. 2, the power transmission path R is a path from the motor 101 to the power transmission member 106. The motor 101, the motor shaft 102, the worm 103, the worm wheel 104, the shaft 105, And a power transmission member 106.

  In the present embodiment, as shown in FIGS. 4 and 5, the torque limiter 10 is disposed between the worm wheel 104 and the power transmission member 106. In FIG. 4, configurations other than the permanent magnet 13 and the hysteresis material 14 of the torque limiter 10 are omitted.

  Specifically, the first rotating body 11 is fixed to a shaft 105 connected to the worm wheel 104. The cylindrical outer peripheral portion of the second rotating body 12 is fixed to the power transmission member 106. In the present embodiment, the shaft 105 is inserted into the central hole 11 a of the first rotating body 11, and the power transmission member 106 is fixed to the cylindrical outer peripheral portion of the second rotating body 12.

  Subsequently, the operation of the power window driving apparatus 100a of the present embodiment will be described with reference to FIGS.

  Due to the driving force of the motor 101, the motor shaft 102 connected to the motor 101 rotates, and the worm 103 connected to the motor shaft 102 rotates. As the worm 103 rotates, the worm wheel 104 meshed with the worm 103 rotates, and the shaft 105 connected to the worm wheel 104 rotates. As a result, the first rotating body 11 fixed to the shaft 105 rotates. When the first rotating body 11 rotates, the permanent magnet 13 fixed to the cylindrical outer peripheral portion 11b of the first rotating body 11 and the cylindrical inner peripheral portion 12b of the second rotating body 12 located on the outer peripheral side thereof are fixed. Since the hysteresis torque is generated with the hysteresis material 14, the second rotating body 12 also rotates. For this reason, the power transmission member 106 fixed to the second rotating body 12 rotates. Along with this rotation, the wire 107 wound around the power transmission member 106 moves, so that the carrier plate 110 to which the window is attached moves up and down along the guide rail 109. In this way, the vehicle window can be moved up and down by a switch operation.

  When a foreign object is caught between the window and the window frame when raising the window (closing the window), the load is transmitted to the second rotating body 12 of the torque limiter 10. When this load exceeds the magnetic attractive force between the permanent magnet 13 and the hysteresis material 14, the transmission between the first rotating body 11 and the second rotating body 12 is interrupted, and the first rotating body 11 and the first rotating body 11 The two-rotor 12 is in an idling state. For this reason, since the rotation of the power transmission member 106 also stops, the wire 107 does not move, and the rising of the window stops. In this way, when an overload is applied, the torque limiter 10 can block the transmission of the driving force from the motor 101.

  If the window does not descend due to resistance or the like when descending the window, the window can be lowered in synchronization with the motor 101 by the one-way clutch 16. Further, depending on the structure, arrangement, and the like of the one-way clutch 16, it is possible to prevent the window from sliding (lowering) when the window is raised.

  As described above, the power window driving device 100a in the present embodiment includes the motor 101, the power transmission member 106 that is rotated by the driving force of the motor 101, and moves the window up and down, and from the motor 101 to the power transmission member 106. And a torque limiter 10 that cuts off transmission of driving force from the motor 101 when an overload is applied. The torque limiter 10 has a first rotation having a cylindrical outer peripheral portion 11b. A second rotating body 12 having a body 11, a cylindrical inner peripheral portion 12 b facing the cylindrical outer peripheral portion 11 b, and being coaxially rotatable with the first rotating body 11, and a cylindrical outer periphery A cylindrical permanent magnet 13 fixed to one of the portion 11b and the cylindrical inner peripheral portion 12b, and a second member fixed to the other of the cylindrical outer peripheral portion 11b and the cylindrical inner peripheral portion 12b; And a cylindrical hysteresis material 14 that generates a hysteresis torque between the permanent magnet 13.

  The torque limiter 10 according to the present embodiment is a torque limiter 10 used in a power window drive mechanism 100a that rotates a power transmission member 106 that moves up and down a window by a driving force of a motor 101, and includes a cylindrical outer peripheral portion 11b. A first rotating body 11 having a cylindrical inner peripheral portion 12b facing the cylindrical outer peripheral portion 11b, and a second rotating body 12 provided coaxially with the first rotating body 11 so as to be relatively rotatable. The cylindrical permanent magnet 13 fixed to one of the cylindrical outer peripheral portion 11b and the cylindrical inner peripheral portion 12b and the other of the cylindrical outer peripheral portion 11b and the cylindrical inner peripheral portion 12b are fixed to the permanent magnet 13. A cylindrical hysteresis member 14 that generates a hysteresis torque therebetween is provided.

  According to the power window drive mechanism 100a and the torque limiter 10 in the present embodiment, when a foreign object is caught between the window and the window frame during the switch operation, the load of the permanent magnet 13 and the hysteresis of the torque limiter 10 is hysteresis. By utilizing the fact that the magnetic attraction with the material 14 is exceeded, the transmission of the first rotating body 11 and the second rotating body 12 is interrupted, thereby stopping the ascending of the window. For this reason, even if the operation of moving the window up and down is repeated, the torque limiter 10 according to the present embodiment is less likely to be deteriorated due to wear or the like as compared with the case where a torque limiter using a coil spring, a friction plate or the like is used. .

  In addition, when the sensor is used, it is necessary to reverse the motor. However, since the motor of the power window drive mechanism has a large output, it may cause a malfunction, and the function of stopping the rise of the window by the sensor is insufficient. It is. However, in the present embodiment, when a load larger than the magnetic attractive force generated between the permanent magnet 13 and the hysteresis material 14 is applied, the rotation of the first rotating body 11 and the second rotating body 12 is caused. Since the transmission is cut off, it is possible to stop the raising of the window regardless of the magnitude of the output of the motor.

  Therefore, the power window drive mechanism 100a and the torque limiter 10 in the present embodiment can enhance the function of stopping the rising of the window when a foreign object is caught between the window and the window frame.

  For this reason, the power window drive mechanism 100a and the torque limiter 10 of the present embodiment are preferably used for a power window drive mechanism of a vehicle, and are preferably used by a power window drive mechanism of an automobile.

  The power window drive mechanism 100a according to the present embodiment preferably further includes a one-way clutch 16 that is provided between the cylindrical outer peripheral portion 11b and the cylindrical inner peripheral portion 12b and is relatively rotatable only in one direction. ing.

  The torque limiter 10 according to the present embodiment preferably further includes a one-way clutch 16 that is provided between the cylindrical outer peripheral portion 11b and the cylindrical inner peripheral portion 12b and is relatively rotatable only in one direction. .

  The normal hysteresis type torque limiter 10 is not provided with the one-way clutch 16, but the torque limiter 10 used in the power window drive mechanism 100a is preferably provided with the one-way clutch 16. Even when the window cannot be lowered by the torque limiter 10 due to resistance or the like, the window can be lowered by synchronizing the one-way clutch 16 with the motor 101. Further, depending on the structure and arrangement of the one-way clutch 16, it is possible to prevent the window from slipping when it is raised.

(Embodiment 2)
The power window drive mechanism 100b and the torque limiter 10 according to the second embodiment of the present invention will be described with reference to FIG. In FIG. 6, configurations other than the permanent magnet 13 and the hysteresis material 14 of the torque limiter 10 are omitted.

  The torque limiter 10 according to the second embodiment has the same configuration as that of the torque limiter 10 according to the first embodiment shown in FIG. 1, but is implemented in that it is arranged in the motor unit as shown in FIG. Different from Form 1. The motor unit includes a motor 101, a motor shaft 102, and a worm 103.

  In the power window drive mechanism 100b of the second embodiment, the first rotating body 11 is fixed to the motor shaft 102, and the second rotating body 12 is fixed to the worm 103. Specifically, the motor shaft 102 is inserted into the central hole 11 a of the first rotating body 11, and the worm 103 is fixed to the cylindrical outer peripheral portion of the second rotating body 12.

  In the power window driving mechanism 100b of the second embodiment, when a foreign object is caught between the window and the window frame when the window is raised, the load is transmitted to the second rotating body 12 of the torque limiter 10. As a result, the second rotating body 12 does not interlock with the first rotating body 11. For this reason, since power is not transmitted between the motor shaft 102 and the worm 103, the raising of the window can be stopped.

(Modification)
As shown in FIG. 7, in a power window drive mechanism 100 c of a modification of the second embodiment, the first rotating body 11 is fixed to the worm 103 and the second rotating body 12 is fixed to the motor shaft 102. Specifically, the worm 103 is inserted into the central hole 11 a of the first rotating body 11, and the motor shaft 102 is fixed to the cylindrical outer peripheral portion of the second rotating body 12. In FIG. 7, configurations other than the permanent magnet 13 and the hysteresis material 14 of the torque limiter 10 are omitted.

  The motor shaft 102 has a rod-shaped member 102a provided on the connection region side with the motor 101, a bottom member 102b continuous with the rod-shaped member 102a, a link with the bottom member 102b, and on the connection region side with the torque limiter 10. And a cylindrical member 102c provided. The cylindrical member 102c is formed so as to accommodate a torque limiter therein.

  In the power window drive mechanism 100c according to the second modification of the second embodiment, when a foreign object is caught between the window and the window frame when the window is raised, the load is the first rotating body of the torque limiter 10. 11, the first rotating body 11 is not interlocked with the second rotating body 12. For this reason, since power is not transmitted between the motor shaft 102 and the worm 103, the raising of the window can be stopped.

  As described above, like the power window drive mechanisms 100b and 100c of the present embodiment and the modified example, the power transmission path R has the motor shaft 102 connected to the motor 101 and the motor shaft 102 via the motor shaft 102. Worm 103 to which the rotation of 101 is transmitted, one of the first rotating body 11 and the second rotating body 12 is fixed to the motor shaft 102, and the other of the first rotating body 11 and the second rotating body 12 is It may be fixed to the worm 103. The power window drive mechanisms 100b and 100c and the torque limiter 10 that enhance the function of stopping the ascent of the window can also be realized in the present embodiment and the modification. Further, when the torque limiter is disposed in the motor unit as in the present embodiment and the modification, the torque limiter can directly block the driving force of the motor 101.

(Embodiment 3)
With reference to FIG. 8, the power window drive mechanism 100d and the torque limiter 10 according to the third embodiment of the present invention will be described. In FIG. 8, the components other than the permanent magnet 13 and the hysteresis material 14 of the torque limiter 10 are omitted.

  The torque limiter 10 according to the third embodiment has the same configuration as the torque limiter 10 according to the first embodiment shown in FIG. 1, but as shown in FIG. 8, a shaft 105 connected to the power transmission member 106 and It differs from the first embodiment in that it is arranged in the worm wheel 104.

  In the power window drive mechanism 100 d of the third embodiment, the first rotating body 11 is fixed to the shaft 105 connected to the power transmission member 106, and the second rotating body 12 is fixed to the worm wheel 104. Specifically, the shaft 105 is inserted into the central hole 11 a of the first rotating body 11, and the worm wheel 104 is fixed to the cylindrical outer peripheral portion of the second rotating body 12.

  In the power window driving mechanism 100d of the third embodiment, when a foreign object is caught between the window and the window frame when the window is raised, the load is transmitted to the first rotating body 11 of the torque limiter 10. As a result, the first rotating body 11 is not interlocked with the second rotating body 12. For this reason, since power is not transmitted between the shaft 105 and the worm wheel 104, the raising of the window can be stopped.

  As described above, like the power window drive mechanism 100 d of the present embodiment, the power transmission path R has the worm 103 that transmits rotation via the motor 101 and the worm wheel 104 that meshes with the worm 103. The first rotating body 11 is fixed to the shaft 105 connected to the power transmission member 106, and the second rotating body 12 is fixed to the worm wheel 104. Also in the present embodiment, it is possible to realize the power window drive mechanism 100d and the torque limiter 10 that enhance the function of stopping the ascent of the window.

  In the present embodiment, the second rotating body 12 and the worm wheel 104 are separate members, but the worm wheel 104 may be the second rotating body 12.

(Embodiment 4)
With reference to FIG. 9, the power window drive mechanism 100e and the torque limiter 10 of Embodiment 4 of this invention are demonstrated. In FIG. 9, configurations other than the permanent magnet 13 and the hysteresis material 14 of the torque limiter 10 are omitted.

  The torque limiter 10 according to the fourth embodiment has the same configuration as the torque limiter 10 according to the first embodiment shown in FIG. 1, but as shown in FIG. 9, the first shaft 111 and the second shaft 112 are provided. It differs from Embodiment 1 in the point arrange | positioned in the inside. The first and second shafts 111 and 112 are located in the power transmission path R, and one of the first and second shafts 111 and 112 receives power from the motor 101, and the first and second shafts 111 and 112 transmit the power. The other of the two shafts 111 and 112 transmits power to the power transmission member 106.

  In the power window drive mechanism 100e of the fourth embodiment, the first rotating body 11 is fixed to the first shaft 111, and the second rotating body 12 is fixed to the second shaft 112. Specifically, the first shaft 111 is inserted into the central hole 11 a of the first rotating body 11, and the second shaft 112 is fixed to the cylindrical outer peripheral portion of the second rotating body 12.

  In the power window drive mechanism 100e of the fourth embodiment, when a foreign object is sandwiched between the window and the window frame when the window is raised, the load is applied to the first rotating body 11 and the second rotor of the torque limiter 10. By being transmitted to one of the rotators 12, the first rotator 11 and the second rotator 12 are not interlocked. For this reason, since power is not transmitted between the first shaft 111 and the second shaft 112, the rising of the window of the first shaft 111 and the second shaft 112 can be stopped.

  As described above, like the power window drive mechanism 100e of the present embodiment, the power transmission path R includes the first shaft 111 and the second shaft 112, and the first rotating body 11 is the first shaft. The second rotating body 12 is fixed to the second shaft 112. Also in the present embodiment, it is possible to realize the power window drive mechanism 100d and the torque limiter 10 that enhance the function of stopping the ascent of the window.

  Here, in the first to fourth embodiments described above, the wire type in which the power transmission member 106 around which the wire 107 for raising and lowering the window is wound is rotated by the driving force of the motor 101 has been described as an example. The power window drive mechanism and the torque limiter are not limited to the wire type, and can be applied to an arm type, for example.

  The embodiment disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is shown not by the above-described embodiment but by the scope of claims, and is intended to include all modifications within the meaning and scope equivalent to the scope of claims.

  DESCRIPTION OF SYMBOLS 10 Torque limiter, 11 1st rotary body, 11a Center hole, 11b Cylindrical outer peripheral part, 11c Reduction part, 11d Expansion part, 12 2nd rotary body, 12a Opening part, 12b Cylindrical inner peripheral part, 12c Bottom part, 13 Permanent Magnet, 14 Hysteresis material, 15 Lid, 16 One-way clutch, 100a, 100b, 100c, 100d, 100e Power window drive mechanism, 101 Motor, 102 Motor shaft, 102a Bar member, 102b Bottom member, 102c Tubular member, 103 Warm 104 Worm wheel, 105 shaft, 106 power transmission member, 107 wire, 108 pulley, 109 guide rail, 110 carrier plate, 111 first axis, 111 second axis, R power transmission path.

Claims (7)

A motor,
A power transmission member that is rotated by the driving force of the motor to raise and lower the window;
A torque limiter that is disposed in a power transmission path from the motor to the power transmission member, and that interrupts transmission of driving force from the motor when an overload is applied;
The torque limiter is
A first rotating body having a cylindrical outer peripheral portion;
A second rotating body having a cylindrical inner peripheral portion facing the cylindrical outer peripheral portion and provided rotatably relative to the first rotating body on the same axis;
A cylindrical permanent magnet fixed to one of the cylindrical outer peripheral portion and the cylindrical inner peripheral portion;
A power window drive mechanism comprising: a cylindrical hysteresis material that is fixed to the other of the cylindrical outer peripheral portion and the cylindrical inner peripheral portion and generates a hysteresis torque with the permanent magnet.   The power window drive mechanism according to claim 1, further comprising a one-way clutch provided between the cylindrical outer peripheral portion and the cylindrical inner peripheral portion and capable of relatively rotating only in one direction. The power transmission path includes a motor shaft coupled to the motor, and a worm to which rotation of the motor is transmitted via the motor shaft,
One of the first rotating body and the second rotating body is fixed to the motor shaft,
The power window drive mechanism according to claim 1 or 2, wherein the other of the first rotating body and the second rotating body is fixed to the worm. The power transmission path includes a worm to which rotation is transmitted via the motor, and a worm wheel meshing with the worm,
The first rotating body is fixed to a shaft connected to the power transmission member,
The power window driving mechanism according to claim 1, wherein the second rotating body is fixed to the worm wheel. The power transmission path includes a worm to which rotation is transmitted via the motor, and a worm wheel meshing with the worm,
The first rotating body is fixed to a shaft connected to the worm wheel,
The power window driving mechanism according to claim 1, wherein the second rotating body is fixed to the power transmission member. A torque limiter used in a power window drive mechanism that rotates a power transmission member that raises and lowers a window by a driving force of a motor,
A first rotating body having a cylindrical outer peripheral portion;
A second rotating body having a cylindrical inner peripheral portion facing the cylindrical outer peripheral portion and provided rotatably relative to the first rotating body on the same axis;
A cylindrical permanent magnet fixed to one of the cylindrical outer peripheral portion and the cylindrical inner peripheral portion;
A torque limiter, comprising: a cylindrical hysteresis material fixed to the other of the cylindrical outer peripheral portion and the cylindrical inner peripheral portion and generating a hysteresis torque with the permanent magnet.   The torque limiter according to claim 6, further comprising a one-way clutch provided between the cylindrical outer peripheral portion and the cylindrical inner peripheral portion and relatively rotatable in only one direction.

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