JP2018134894A - Wiper device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a wiper device capable of reducing a load in a radial direction that a rotor of a motor receives.SOLUTION: A wiper device 16, which has a first wiper arm that operates on a first pivot axis 26 as a center and a second wiper arm that operates on a second pivot axis 27 as a center, comprises: a first worm wheel 40 rotating integrally with the first pivot axis 26; a second worm wheel 51 rotating integrally with the second pivot axis 27; a first worm shaft 33 having a first worm 38 engaging with the first worm wheel 40; a second worm shaft 42 having a second worm 43 engaging with the second worm wheel 51; a brushless motor 19 rotating the first worm shaft 33; and a torque transmission mechanism 23 connecting the first worm shaft 33 and the second worm shaft 42. The torque transmission mechanism 23 comprises a first Cardan joint 48 and a second Cardan joint 49.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a wiper device having a first wiper arm that operates about a first pivot axis and a second wiper arm that operates about a second pivot axis.

  Conventionally, an example of a wiper device having a first wiper arm that operates around a first pivot axis and a second wiper arm that operates around a second pivot axis is described in Patent Document 1. A wiper device described in Patent Document 1 includes a drive motor, a gear portion to which torque of the drive motor is transmitted, a first drive shaft as a first pivot shaft that rotates by the torque of the gear portion, and a first drive shaft. And a first bearing that supports the first bearing.

  In addition, the wiper device includes a first wiper arm attached to the first drive shaft, a crank connected to the first drive shaft, a connecting rod rotatably connected to the crank via the first joint, And a lever rotatably connected to the rod via a second joint. Further, the wiper device includes a second drive shaft as a second pivot shaft coupled to the lever, a second bearing that rotatably supports the second drive shaft, and a second wiper arm attached to the second drive shaft. And having.

German Patent Application Publication No. 10 2014 225 800 Specification

  However, the wiper device described in Patent Document 1 has a problem that a load corresponding to the reaction force of the torque that operates the first wiper arm and the second wiper arm is applied in the radial direction to the connecting portion between the gear portion and the drive motor. there were.

  The objective of this invention is providing the wiper apparatus which can reduce the radial load which a motor receives.

  The wiper device of the present invention is a wiper device having a first wiper arm that operates about a first pivot shaft and a second wiper arm that operates about a second pivot shaft, and is integrated with the first pivot shaft. A rotating first worm wheel, a second worm wheel rotating integrally with the second pivot shaft, a first worm shaft having a first worm meshing with the first worm wheel, and a second meshing with the second worm wheel A second worm shaft having a worm, a motor for rotating the first worm shaft, and a torque transmission mechanism for connecting the first worm shaft and the second worm shaft, the torque transmission mechanism comprising: It has a constant velocity joint.

  In the wiper device of the present invention, the first worm shaft receives a radial load from the first worm wheel and does not receive a radial load from the second worm wheel. Therefore, the radial load received by the motor can be reduced.

1 is a schematic plan view of a vehicle provided with a wiper device according to an embodiment of the present invention. It is a top view of the wiper apparatus shown in FIG. It is a top view which shows the other example of the wiper apparatus shown in FIG.

  Hereinafter, an example in which a wiper device according to an embodiment of the present invention is provided in a vehicle will be described in detail with reference to the drawings.

  The vehicle 10 shown in FIG. 1 is a driver seat on the left side of the center when viewed from the front, and a passenger seat on the right side of the center. The vehicle 10 includes a first front pillar 11 and a second front pillar 12, and the windshield 13 is attached between the first front pillar 11 and the second front pillar 12. The first front pillar 11 is close to the driver seat, and the second front pillar 12 is close to the passenger seat. An inner mirror 14 is provided in the vehicle 10. The inner mirror 14 is arranged at the center in the left-right direction of the vehicle 10, that is, in the width direction of the vehicle 10. A camera 15 is attached to the inner mirror 14. The camera 15 photographs the front of the vehicle 10 through the windshield 13.

  The vehicle 10 includes a wiper device 16 that wipes the windshield 13. The wiper device 16 includes a first wiper arm 17 and a second wiper arm 18 shown in FIG. 1, a brushless motor 19 shown in FIG. 2, a first reduction mechanism 20, a second reduction mechanism 21, a motor case 22, a torque transmission mechanism 23, a first A gear case 24 and a second gear case 25 are provided.

  The first wiper arm 17 operates about the first pivot shaft 26, and the second wiper arm 18 operates about the second pivot shaft 27. The first pivot shaft 26 and the second pivot shaft 27 are arranged in parallel to each other. A first wiper blade 28 is attached to the free end of the first wiper arm 17, and a second wiper blade 29 is attached to the free end of the second wiper arm 18.

  The brushless motor 19 is a power source that drives the first wiper arm 17 and the second wiper arm 18. The brushless motor 19 is disposed in front of the windshield 13 in the front-rear direction of the vehicle 10. The motor case 22, the first gear case 24, and the second gear case 25 are disposed at positions that are closer to one side from the center in the width direction of the vehicle 10. That is, the motor case 22, the first gear case 24, and the second gear case 25 are arranged between the first front pillar 11 and the inner mirror 14 in the width direction of the vehicle 10.

  The motor case 22 is fixed to the first gear case 24, and the first gear case 24 is fixed to the vehicle body 30 by a bracket and a fixing element. The fixing element includes a bolt and a nut. The brushless motor 19 has a stator 31 fixed in the motor case 22 and a rotor 32 rotatable in the motor case 22. Stator 31 has a stator core and a coil formed by winding a conductive wire around the stator core. Three coils are wound corresponding to three phases, that is, the U phase, the V phase, and the W phase. The rotor 32 includes a first worm shaft 33, a rotor core 34 attached to the first worm shaft 33, and a permanent magnet attached to the rotor core 34. The first worm shaft 33 shown in FIG. 2 also serves as the rotor shaft of the brushless motor 19.

  The first worm shaft 33 is disposed over the motor case 22 and the first gear case 24. A bearing 35 is provided in the motor case 22, and two bearings 36 and 37 are provided in the first gear case 24. The first worm shaft 33 is supported by the three bearings 35, 36, and 37 with the first center line A1 as the rotation center. The first center line A1 is arranged along the width direction of the vehicle 10, that is, the left-right direction. The three bearings 35, 36, and 37 are arranged at different positions in the first center line A1 direction. The bearing 36 is disposed between the bearing 35 and the bearing 37 in the first center line A1 direction. The rotor core 34 is disposed between the bearing 35 and the bearing 36 in the first center line A1 direction.

  A first worm 38 is formed at a position located between the bearing 36 and the bearing 37 in the first centerline A1 direction on the outer peripheral surface of the first worm shaft 33. A permanent magnet 39 is attached to the outer peripheral surface of the first worm shaft 33. The permanent magnet 39 is disposed between the bearing 36 and the first worm 38 in the first centerline A1 direction.

  A substrate is provided in the first gear case 24, and electronic components such as a microcomputer, an inverter circuit, and a magnetic sensor are attached to the substrate. The inverter circuit is connected to the coil of the stator 31 and has a plurality of switching elements. A wiper switch is provided in the vehicle 10 and a wiper switch signal is input to the microcomputer. The magnetic sensor detects a change in the magnetic field formed by the permanent magnet 39 and outputs a signal. A signal output from the magnetic sensor is input to the microcomputer. The microcomputer detects the phase in the rotational direction of the rotor 32 by processing the signal of the magnetic sensor. The microcomputer outputs a signal for controlling the inverter circuit. The microcomputer turns on and off the switching elements of the inverter circuit to control the rotation and stop of the rotor 32, the rotation direction and the rotation speed of the rotor 32. The microcomputer rotates the rotor 32 forward and backward.

  The first speed reduction mechanism 20 is provided in the first gear case 24. The first speed reduction mechanism 20 includes a first worm wheel 40 and a first worm 38. A gear 41 is formed on the outer peripheral surface of the first worm wheel 40, and the gear 41 meshes with the first worm 38. The first worm wheel 40 is disposed coaxially with the first pivot shaft 26, and the first worm wheel 40 rotates together with the first pivot shaft 26. The first pivot shaft 26 and the first worm wheel 40 are disposed behind the first center line A1 in the front-rear direction of the vehicle 10.

  A part of the first pivot shaft 26 is disposed outside the first gear case 24. The first pivot shaft 26 is rotatably supported by a bearing. The first wiper arm 17 is attached to a portion of the first pivot shaft 26 that is disposed outside the first gear case 24. The first pivot shaft 26 is provided with a male screw portion, and the first wiper arm 17 is fixed to the first pivot shaft 26 by tightening a nut.

  The second reduction mechanism 21 is provided in the second gear case 25. The second reduction mechanism 21 includes a second worm wheel 51, a second worm shaft 42, and a second worm 43 provided on the outer peripheral surface of the second worm shaft 42. The twist direction of the second worm 43 is opposite to the twist direction of the first worm 38. A gear 44 is formed on the outer peripheral surface of the second worm wheel 51, and the gear 44 meshes with the second worm 43. Two bearings 45 and 46 are disposed in the second gear case 25, and the second worm shaft 42 is supported by the bearings 45 and 46 with the second center line A2 as the center of rotation. The two bearings 45 and 46 are arranged at an interval in the second center line A2 direction. The second worm 43 is disposed between the bearing 45 and the bearing 46 in the second centerline A2 direction.

  The second worm wheel 51 is disposed coaxially with the second pivot shaft 27 and rotates integrally with the second pivot shaft 27. In the plan view of the wiper device 16, the first center line A1 and the second center line A2 are parallel to each other. The plan view of the wiper device 16 corresponds to a plan view perpendicular to the first pivot shaft 26 and the second pivot shaft 27. The second center line A2 is arranged behind the first center line A1 in the front-rear direction of the vehicle 10. The second pivot shaft 27 and the second worm wheel 51 are disposed in front of the second center line A2 in the longitudinal direction of the vehicle 10. In a plan view of the wiper device 16, the first pivot shaft 26 and the second pivot shaft 27 are disposed between the first center line A 1 and the second center line A 2 in the front-rear direction of the vehicle 10.

  A part of the second pivot shaft 27 is disposed outside the second gear case 25. The second pivot shaft 27 is rotatably supported by a bearing. A second wiper arm 18 is attached to a portion of the second pivot shaft 27 that is disposed outside the second gear case 25. The second pivot shaft 27 is provided with a male thread portion, and the second wiper arm 18 is fixed to the second pivot shaft 27 by tightening a nut.

  The first gear case 24 and the second gear case 25 are arranged at an interval in the width direction of the vehicle 10. The first gear case 24 is disposed at a position closer to the first front pillar 11 than the second gear case 25 in the width direction of the vehicle 10. The motor case 22 is disposed between the first gear case 24 and the second gear case 25 in the width direction of the vehicle 10.

  The motor case 22 and the torque transmission mechanism 23 are disposed between the first gear case 24 and the second gear case 25 in the width direction of the vehicle 10. The torque transmission mechanism 23 is a mechanism that transmits the torque of the first worm shaft 33 to the second worm shaft 42. The torque transmission mechanism 23 includes a rotating shaft 47, a first cardan joint 48, and a second cardan joint 49. The first cardan joint 48 connects the first worm shaft 33 and the rotating shaft 47 so that power can be transmitted, and the second cardan joint 49 connects the rotating shaft 47 and the second worm shaft 42 so that power can be transmitted.

  The brushless motor 19 is disposed between the first worm wheel 40 and the first pivot shaft 26 and the first cardan joint 48 in the width direction of the vehicle 10 in a plan view of the wiper device 16. In other words, the stator 31 and the rotor core 34 are disposed between the first worm 38 and the first cardan joint 48 in the first centerline A1 direction.

  In a plan view of the wiper device 16, the third center line A3 that is the rotation center of the rotation shaft 47 is inclined with respect to the first center line A1 and the second center line A2. The acute angle angle θ1 formed between the third center line A3 and the first center line A1 and the acute angle angle θ2 formed between the third center line A3 and the second center line A2 are: Are identical to each other. Each of the first cardan joint 48 and the second cardan joint 49 is a universal joint with unequal speed.

  A resin cover 50 is disposed between the motor case 22 and the second gear case 25. The resin cover 50 has a cylindrical shape and covers the torque transmission mechanism 23. Both ends of the resin cover 50 in the length direction may have either a structure contacting the motor case 22 and the second gear case 25 or a structure separated from the motor case 22 and the second gear case 25.

  The operation of the wiper device 16 will be described. When a wiper switch provided in the vehicle 10 is turned on, power from the power source is supplied to the stator 31 and the rotor 32 rotates. The microcomputer processes the signal of the magnetic sensor to detect the phase in the rotational direction of the rotor 32, and controls the timing for turning on and off the switching elements of the inverter circuit based on the detection result. By this control, power is supplied to the three coils of the stator 31 at different energization timings. Further, the microcomputer controls the inverter circuit to control the direction of the current flowing through the three coils, and alternately switches the rotation direction of the rotor 32 between forward rotation and reverse rotation.

  When the first worm shaft 33 rotates forward and backward, the torque is transmitted to the first worm wheel 40. The first pivot shaft 26 rotates forward and backward together with the first worm wheel 40. When the first pivot shaft 26 and the first worm wheel 40 are rotated forward in FIG. 2, for example, in the counterclockwise direction D1, the first wiper arm 17 is operated toward the upper reverse position in FIG.

  Further, the torque of the first worm shaft 33 is transmitted to the second worm shaft 42 via the torque transmission mechanism 23. When the first cardan joint 48 transmits the torque of the first worm shaft 33 to the rotating shaft 47, the first worm shaft 33 and the rotating shaft 47 are unequal. That is, the angular velocities of each other do not match. Further, when the second cardan joint 49 transmits the torque of the rotating shaft 47 to the second worm shaft 42, the rotating shaft 47 and the second worm shaft 42 are at unequal speed. That is, the angular velocities of each other do not match. By the above action, the first worm shaft 33 and the second worm shaft 42 rotate at a constant speed, that is, the angular velocities thereof coincide with each other. Thus, the combination of the first cardan joint 48 and the second cardan joint 49 serves as a constant velocity joint.

  The second pivot shaft 27 rotates forward and backward together with the second worm wheel 51. The rotation direction of the first worm wheel 40 is the same as the rotation direction of the second worm wheel 51. Therefore, when the first pivot shaft 26 rotates counterclockwise in FIG. 2, the second pivot shaft 27 and the second worm wheel 51 also rotate positively in FIG. 2, that is, rotate counterclockwise D2, as shown in FIG. The second wiper arm 18 shown in FIG.

  On the other hand, when the rotor 32 rotates in the reverse direction, the first pivot shaft 26 and the first worm wheel 40 rotate in the reverse direction in FIG. 2, that is, in the clockwise direction D3. For this reason, the first wiper arm 17 operates toward the lower inversion position in FIG. Further, in synchronization with the rotation of the first pivot shaft 26 in the clockwise direction D3 in FIG. 2, the second pivot shaft 27 and the second worm wheel 51 are reversely rotated in FIG. 2, that is, rotated in the clockwise direction D4. To do. For this reason, the second wiper arm 18 operates toward the lower inversion position in FIG.

  In this way, the first wiper arm 17 operates between the upper reverse position and the lower reverse position with the first pivot shaft 26 as the center, and the first wiper blade 28 is in the first range on the surface of the windshield 13. Wipe B1. The lower turning position of the first wiper arm 17 is the position farthest from the first front pillar 11 shown in FIG. 1, and the upper turning position of the first wiper arm 17 is the position closest to the first front pillar 11.

  Further, the second wiper arm 18 operates between the upper reverse position and the lower reverse position with the second pivot shaft 27 as the center, and the second wiper blade 29 wipes the second range B2 on the surface of the windshield 13. To do. The upper reverse position of the second wiper arm 18 is the position farthest from the second front pillar 12 shown in FIG. 1, and the lower reverse position of the second wiper arm 18 is the position closest to the second front pillar 12.

  Thus, in the stroke in which the first wiper arm 17 operates from the lower inversion position toward the upper inversion position, the second wiper arm 18 also operates from the lower inversion position toward the upper inversion position. Further, in the stroke in which the first wiper arm 17 operates from the upper reverse position to the lower reverse position, the second wiper arm 18 also operates from the upper reverse position to the lower reverse position. That is, the wiper device 16 is a so-called tandem type in which the operation direction of the first wiper arm 17 and the operation direction of the second wiper arm 18 are the same.

  The arrangement position of the camera 15 shown in FIG. 1 is outside the first range B1, but is within the second range B2. Therefore, raindrops and dirt in front of the camera 15 can be wiped off by the second wiper blade 29, and a reduction in photographing accuracy and a reduction in image quality of the camera 15 can be suppressed.

  In FIG. 2, when torque is transmitted from the first worm shaft 33 to the first worm wheel 40, a load F <b> 1 is applied to a meshing portion between the first worm wheel 40 and the first worm 38. In plan view perpendicular to the first pivot shaft 26, the load F1 is perpendicular to the first center line A1. The load F1 is transmitted to the vehicle body 30 through the first worm shaft 33, the bearings 36 and 37, and the first gear case 24.

  Further, in FIG. 2, when torque is transmitted from the second worm shaft 42 to the second worm wheel 51, a load F <b> 2 is applied to a meshing position between the second worm wheel 51 and the second worm 43. In a plan view perpendicular to the second pivot shaft 27, the load F2 is perpendicular to the second center line A2. The load F2 is transmitted to the vehicle body 30 via the second worm shaft 42, the bearings 45 and 46, and the second gear case 25.

  Thus, the first worm shaft 33 receives the load F1 and does not receive the load F2. For this reason, the load which the bearings 36 and 37 receive in the radial direction of the first worm shaft 33 can be reduced, and an increase in power loss can be suppressed in the rotating portions of the bearings 36 and 37. Therefore, it can suppress that the efficiency of the brushless motor 19 falls. Moreover, when the rotation direction of the 1st worm wheel 40 switches to forward / reverse, it can suppress that the 1st worm shaft 33 vibrates to radial direction. Furthermore, it can suppress that durability of the brushless motor 19 falls.

  In addition, the torque transmission mechanism 23 that transmits the torque of the first worm shaft 33 to the second worm shaft 42 switches the rotation direction, but in the plan view of the wiper device 16, it moves like a link mechanism or a lever mechanism, that is, Does not swing. For this reason, it is not necessary to secure the working space of the torque transmission mechanism 23, and the on-vehicle performance of the wiper device 16 is improved.

  Further, when the first worm wheel 40 is rotated in the counterclockwise direction D1 by the torque of the first worm shaft 33, the first worm shaft 33 receives a reaction force R1 in the first centerline A1 direction. When the first worm wheel 40 is rotated in the clockwise direction D3 by the torque of the first worm shaft 33, the first worm shaft 33 receives a reaction force R2 in the direction of the first center line A1.

  On the other hand, when the second worm wheel 51 is rotated in the counterclockwise direction D2 by the torque of the second worm shaft 42, the second worm shaft 42 receives the reaction force R3 in the second center line A2 direction. When the second worm wheel 51 is rotated clockwise by the torque of the second worm shaft 42, the second worm shaft 42 receives a reaction force R4 in the direction of the second center line A2.

  When the reaction force R1 is generated, a reaction force R3 is generated. The reaction force R1 and the reaction force R3 are opposite to each other. Further, when the reaction force R2 is generated, a reaction force R4 is generated. The reaction force R2 and the reaction force R4 are opposite to each other. Therefore, the reaction force R1 and the reaction force R3 are transmitted to the vehicle body 30 and cancel each other, and the reaction force R2 and the reaction force R4 are transmitted to the vehicle body 30 and cancel each other. Therefore, vibration of the vehicle body 30 can be suppressed. Even if the first pivot shaft 26 and the second pivot shaft 27 are set to different rotation angles, and the reaction force R1 and the reaction force R3, and the reaction force R2 and the reaction force R4 have different values, Since each reaction force partially cancels, the vibration suppression effect of the vehicle body 30 can be obtained.

  Only the first wiper arm 17 is attached to the first pivot shaft 26. For this reason, the axial length of the 1st pivot axis | shaft 26 can be shortened compared with what attaches a link mechanism etc. to a 1st pivot axis | shaft. Therefore, the space for arranging the first gear case 24 in the engine room can be reduced. Therefore, the layout property and in-vehicle property of the wiper device 16 in the engine room are improved.

  Further, since the first pivot shaft 26 does not have to bear the torque for operating the second wiper arm 18, it is not necessary to increase the strength of the first pivot shaft 26, and the thickness can be increased or the first worm wheel 40 can be increased. It is not necessary to form a thick film. Further, a configuration in which a reinforcing portion that reinforces the first gear case 24 that supports the first pivot shaft 26 via a bearing, such as a rib or a frame, is also possible.

  The resin cover 50 prevents foreign matter from adhering to the first cardan joint 48 and the second cardan joint 49 and foreign matter from entering the motor case 22 and the second gear case 25. Foreign substances include dust and water.

  Another layout of the wiper device 16 will be described with reference to FIG. In the wiper device 16 shown in FIG. 3, the first gear case 24 is disposed between the motor case 22 and the torque transmission mechanism 23 in the width direction of the vehicle 10. In other words, the first worm 38 is disposed between the stator 31 and the rotor core 34 and the first cardan joint 48 in the direction of the first center line A1. The first worm 38 is disposed between the rotor core 34 and the first cardan joint 48 in the first centerline A1 direction. The other configuration of the wiper device 16 shown in FIG. 3 is the same as that of the wiper device 16 shown in FIGS. Also in the wiper device 16 shown in FIG. 3, the same effect as the wiper device 16 shown in FIGS. 1 and 2 can be obtained.

  The meaning of the matters described in the embodiment will be described. The brushless motor 19 is an example of a motor, and a combination of the first cardan joint 48 and the second cardan joint 49 forms a constant velocity joint. The windshield 13 is an example of a windshield.

  Needless to say, the wiper device is not limited to the above-described embodiment, and various changes can be made without departing from the scope of the invention. For example, a structure in which a motor shaft to which a motor rotor is attached and a first worm shaft are provided separately, and the motor shaft and the first worm shaft are disposed concentrically is included. Further, the configuration of the torque transmission mechanism can be changed according to the degree of freedom of the layout of the wiper device attached to the vehicle body. For example, it is possible to use constant velocity joints in place of the two cardan joints. The constant velocity joint includes a bar field type, a tripart type, a Zepper type, and a cross groove type. Further, the number of constant velocity joints provided in the torque transmission mechanism may be one.

  Furthermore, the angle θ1 and the angle θ2 may be different from each other. Further, the first center line and the second center line may intersect with each other, and the first center line to the third center line may be arranged concentrically with each other.

  The first worm wheel can also be disposed in front of the first worm shaft in the longitudinal direction of the vehicle. Further, the second worm wheel can be disposed behind the second worm shaft in the longitudinal direction of the vehicle. Furthermore, the twist directions of the first worm and the second worm may be the same.

  Furthermore, the motor for driving the wiper arm may be an electric motor, and the electric motor includes a brushless motor and a motor with a brush. The motor with brush includes a coil formed by winding a conductive wire around a rotor core, a commutator provided on the rotor shaft and connected to the coil, a brush in contact with the commutator, a brush holder attached to the motor case and supporting the brush And a permanent magnet fixed to the motor case.

  The wiper device includes one in which the first pivot shaft and the second pivot shaft are arranged on the right side when the vehicle is viewed from the front. The wiper device is disposed on the vehicle 10 in a state that is symmetrical with respect to the arrangement state shown in FIG.

  Further, the wiper device includes one in which the first pivot shaft and the second pivot shaft are separately arranged on the right side and the left side when the vehicle is viewed from the front. This wiper device corresponds to a so-called opposite type in which a first wiper arm and a second wiper arm reciprocate symmetrically across an inner mirror. The vehicle may have a driver seat on the right side of the center and a passenger seat on the left side of the center.

DESCRIPTION OF SYMBOLS 10 Vehicle 11 1st front pillar 12 2nd front pillar 13 Windshield 14 Inner mirror 15 Camera 16 Wiper apparatus 17 1st wiper arm 18 2nd wiper arm 19 Brushless motor 20 1st reduction mechanism 21 2nd reduction mechanism 22 Motor case 23 Torque transmission Mechanism 24 First gear case 25 Second gear case 26 First pivot shaft 27 Second pivot shaft 28 First wiper blade 29 Second wiper blade 30 Car body 31 Stator 32 Rotor 33 First worm shaft 34 Rotor cores 35, 36, 37, 45, 46 Bearing 38 First worm 39 Permanent magnet 40 First worm wheel 41, 44 Gear 42 Second worm shaft 43 Second worm 47 Rotating shaft 48 First cardan joint 49 Second cardan joint 50 Resin cover 51 Second Worm wheel A1 First centerline A2 Second centerline A3 Third centerline B1 First range B2 Second range D1, D2 Counterclockwise direction D3, D4 Clockwise direction F1, F2 Load R1, R2, R3, R4 Reaction force θ1 , Θ2 angle

Claims (7)

A wiper device having a first wiper arm that operates about a first pivot axis and a second wiper arm that operates about a second pivot axis,
A first worm wheel that rotates integrally with the first pivot shaft;
A second worm wheel that rotates together with the second pivot shaft;
A first worm shaft having a first worm meshing with the first worm wheel;
A second worm shaft having a second worm meshing with the second worm wheel;
A motor for rotating the first worm shaft;
A torque transmission mechanism connecting the first worm shaft and the second worm shaft;
Have
The said torque transmission mechanism is a wiper apparatus provided with the constant velocity joint. The wiper device according to claim 1, wherein
A first center line that is a rotation center of the first worm shaft and a second center line that is a rotation center of the second worm shaft are arranged in parallel to each other;
The wiper device according to claim 1, wherein the torque transmission mechanism is disposed between the first worm shaft and the second worm shaft in a direction along the first center line and the second center line. . The wiper device according to claim 1 or 2,
The wiper device, wherein a twist direction of the first worm and a twist direction of the second worm are opposite to each other. The wiper device according to claim 2, wherein
The torque transmission mechanism includes a rotating shaft connected to the constant velocity joint,
The wiper device, wherein a third center line that is a rotation center of the rotation shaft is inclined with respect to the first center line and the second center line. The wiper device according to claim 2 or 4,
The wiper device, wherein the motor is disposed between the torque transmission mechanism and the first worm in a direction along the first center line. The wiper device according to any one of claims 2, 4, and 5,
The wiper device, wherein the first worm is disposed between the torque transmission mechanism and the motor in a direction along the first center line. The wiper device according to any one of claims 1 to 6,
The first wiper arm and the second wiper arm wipe a windshield of a vehicle,
The wiper device, wherein the first pivot shaft and the second pivot shaft are arranged on either the right side or the left side when the vehicle is viewed from the front.

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