JP6301189B2 - Wiper device - Google Patents

Description

  The present invention relates to a wiper device for wiping a window, and particularly to a wiper device provided with a cover.

  2. Description of the Related Art Conventionally, as a wiper device provided in a vehicle, a structure for transmitting the rotational force of an electric motor to a pivot shaft via a link mechanism is known, and an example of the wiper device is described in Patent Document 1. A wiper device described in Patent Document 1 includes a bracket attached to a vehicle body, a support member provided on the bracket, a pivot shaft rotatably supported by the support member, a wiper arm attached to the pivot shaft, and a bibot shaft And a wiper motor connected to the link mechanism. The link mechanism includes a pivot lever that rotates together with the pivot shaft, a connection rod that is operatively connected to the pivot lever, and a crank arm that is rotatably connected to the connection rod. Connected to the output shaft.

  A cover is attached to the support member. The cover includes a holding hole, and the cylindrical portion of the support member is disposed in the holding hole. The cover includes a plate-like extending portion and a water receiving portion. The extending portion is disposed above the connecting portion between the pivot lever and the connecting rod. The water receiver has a pair of side walls.

  According to the wiper device described in Patent Document 1, when water enters from the gap between the vehicle bodies, the water passes between the pair of side walls and is guided sideways. Therefore, water can be prevented from reaching the pivot lever.

JP 2009-179104 A

  However, the cover described in Patent Document 1 may move in the longitudinal direction of the pivot shaft, which may reduce the waterproofness of the cover.

  The objective of this invention is providing the wiper apparatus which can suppress that the waterproofness of a cover falls.

The present invention is a wiper device comprising a pivot shaft to which a wiper arm is attached, a support member that rotatably supports the pivot shaft, and a power transmission mechanism that transmits power from a power source to the pivot shaft. possess a cover for covering the front Symbol power transmission mechanism, and a movement-preventing mechanism for preventing the cover is moved in the direction along the rotation center line of the pivot shaft, the support member, the pivot shaft is located A first tube portion having a shaft hole to be mounted, and a mounting portion protruding in a radial direction of the pivot shaft from an outer peripheral surface of the first tube portion and fixed to a vehicle body, and the cover includes the a body attached to the first tubular portion, that have and an auxiliary piece for closing an opening provided in said main body.

  In the wiper device of the present invention, the cover includes a guide element that guides a foreign object outside the operating range of the power transmission mechanism in a plan view perpendicular to a vertical line.

  In the wiper device of the present invention, a window portion is formed by the main body and the auxiliary piece, and the attachment portion is arranged on the window portion, and the movement preventing mechanism includes the main body and the auxiliary piece.

  In the wiper device of the present invention, the main body and the auxiliary piece overlap each other around the notch.

  In the wiper device of the present invention, the power transmission mechanism is connected to a first transmission member that is operated by power of the power source, and is rotatable with respect to the first transmission member via a connection pin, and And a second transmission member that transmits power of the transmission member to the pivot shaft.

  In the wiper device according to the present invention, the cover includes a second tube portion having a holding hole in which the first tube portion is disposed, and a protrusion for positioning the first tube portion in the radial direction is provided in the second tube. It is provided on the inner surface of the part.

  The wiper device of the present invention is attached to a portion of the pivot shaft exposed to the outside of the cover, and is provided with a seal member that seals between the cover and the pivot shaft.

  According to the present invention, it is possible to prevent water from adhering to the power transmission mechanism. Further, the cover does not move in the direction along the rotation center line of the pivot shaft, and the waterproofness of the cover can be secured.

It is a typical perspective view of a vehicle provided with the wiper device of the present invention. It is a side view which shows the support mechanism of the wiper arm provided in the wiper apparatus of this invention. FIG. 3 is a plan view perpendicular to the rotation center line of the pivot shaft, which is a support mechanism for the wiper arm shown in FIG. 2. FIG. 4 is a cross-sectional view of a wiper arm support mechanism taken along line IV-IV in FIG. 3. It is a disassembled perspective view of the support mechanism of the wiper arm shown in FIG. FIG. 4 is a perspective view of the cover shown in FIGS. 2 and 3. It is sectional drawing of the cover in the VII-VII line of FIG. It is a disassembled perspective view which shows the other example of a cover. It is sectional drawing of the cover shown in FIG.

  Hereinafter, embodiments of the present invention will be described in detail with reference to FIGS. A vehicle 10 shown in FIG. 1 includes a front window 11, and a wiper device 12 is provided on the front side of the front window 11. The wiper device 12 includes a drive device 13, a wiper arm 14 and a wiper arm 15, a link mechanism 16 that transmits the power of the drive device 13 to the wiper arm 14, and a link mechanism 17 that transmits the power of the drive device 13 to the wiper arm 15. Have. The drive device 13 includes an electric motor 18 and a speed reduction mechanism 19, and power transmitted from the electric motor 18 to the speed reduction mechanism 19 is distributed to the link mechanisms 16 and 17.

  A frame 20 that supports the driving device 13 is provided, and support members 21 and 22 are provided at both ends of the frame 20, respectively. The support member 21 rotatably supports the pivot shaft 23 to which the wiper arm 14 is fixed, and the support member 22 rotatably supports the pivot shaft 24 to which the wiper arm 15 is fixed. Two brackets 26 and 27 are provided on the vehicle body 25, the support member 21 is fixed to the bracket 26, and the support member 22 is fixed to the bracket 27.

  The support member 21 that supports the wiper arm 14 protrudes outward in the radial direction of the pivot shaft 23 from the outer surface of the cylindrical portion 29 having a shaft hole 28 that rotatably supports the pivot shaft 23. And an attachment portion 30. The attachment part 30 is fixed to the bracket 26 by a screw member. In a state where the support member 21 is fixed to the bracket 26, the rotation center line A1 around which the pivot shaft 23 rotates is inclined with respect to the vertical line. The wiper arm 14 is attached to the upper end of the pivot shaft 23, and the nut 64 is tightened to fix the wiper arm 14 to the pivot shaft 23.

  The link mechanism 16 includes an arm 31 and a link 32, one end of the arm 31 is connected to the pivot shaft 23, and the other end of the arm 31 is connected to the link 32 via a connecting pin 33. The arm 31 rotates together with the pivot shaft 23, and the arm 31 and the link 32 are rotatably connected via a connecting pin 33. The arm 31 extends outward in the radial direction of the pivot shaft 23. The power of the electric motor 18 is transmitted to the link mechanism 16 via the speed reduction mechanism 19.

  A cylindrical bush 34 is provided in the shaft hole 28, and the pivot shaft 23 is rotatably supported by the bush 34. Further, an O-ring 35 is provided in the shaft hole 28 and sealed from the lower end of the shaft hole 28 so that foreign matters such as water do not enter the shaft hole 28. The O-ring 35 is disposed between the bush 34 and the arm 31 in the direction along the rotation center line A1.

  A cover 36 that covers the support member 21 and the arm 31 is provided. The cover 36 is disposed over the upper side and the side of the support member 21 and is disposed over the arm 31. That is, the cover 36 is disposed on the arm 31 in a plan view perpendicular to the vertical line. The cover 36 includes a main body 37 and an auxiliary piece 53 attached to the main body 37. Both the main body 37 and the auxiliary piece 53 are formed of synthetic resin. The main body 37 and the auxiliary piece 53 are separate members.

  The main body 37 includes two wall portions 38 and 39 arranged at intervals, and a wall portion 40 that connects the two wall portions 38 and 39. The two wall portions 38 and 39 are both curved, and a groove 41 is formed between the wall portion 38 and the wall portion 39. The cylindrical portion 29 is disposed between the wall portion 38 and the wall portion 39. One end in the length direction of the groove 41 is closed by the wall 40, and the other end in the length direction of the groove 41 is opened to form a discharge port 41a. The discharge port 41a is disposed outside the operating range of the arm 31 and the link 32 in a plan view perpendicular to the vertical line.

  Further, a cylindrical portion 42 is provided between the wall portion 38 and the wall portion 39. The cylindrical portion 42 includes a holding hole 43, and the cylindrical portion 29 is disposed in the holding hole 43. A plurality of ribs 44 are arranged on the inner surface of the holding hole 43 along the circumferential direction. The plurality of ribs 44 are in contact with the outer peripheral surface of the cylindrical portion 29, and the plurality of ribs 44 position the cylindrical portion 29 with respect to the main body 37 in the radial direction.

  An opening 45 is provided in the wall portion 38 of the main body 37. The opening 45 is formed by cutting out a part of the wall portion 38. The wall portion 38 includes support walls 37 a and 37 b along both sides of the opening 45. Two insertion holes 46 are provided in the support wall 37a, and one insertion hole 47 is provided in the support wall 37b. The support wall 37b is provided with a notch 38a. The notch 38 a is connected to the opening 45.

  The auxiliary piece 53 is provided on the rectangular plate portion 48, two insertions 49 provided on the side edge 48a of the plate portion 48, the insertion piece 50 provided on the side edge 48b parallel to the side edge 48a, and the side edge 48b. And an operating piece 51. The plate portion 48 includes a side edge 48c that connects the side edge 48a and the side edge 48b. A protrusion 52 is provided on the operation piece 51. When the tube portion 29 is disposed in the holding hole 43, the attachment portion 30 is disposed in the opening 45, and a part of the attachment portion 30 is disposed outside the main body 37. The auxiliary piece 53 is attached to the main body 37 in a state where the attachment portion 30 is disposed in the opening 45 and a part of the attachment portion 30 is disposed outside the main body 37.

  Specifically, the insertion piece 49 is inserted into the insertion hole 46, and the insertion piece 50 is inserted into the insertion hole 47. Moreover, the operation piece 51 is located in the notch 38a. The protrusion 52 is locked to the wall portion 38. By engaging the insertion piece 49 and the protrusion 52 with the wall portion 38, the auxiliary piece 53 is prevented from moving in the radial direction of the pivot shaft 23 in a direction away from the pivot shaft 23.

  Furthermore, the insertion piece 49 and the protrusion 52 are engaged with the wall portion 38, so that the auxiliary piece 53 is prevented from moving in all directions along the surface of the plate portion 48. Specifically, the auxiliary piece 53 does not move in the direction along the rotation center line A1. Further, the auxiliary piece 53 does not move in the direction intersecting the rotation center line A1.

  When the auxiliary piece 53 is attached to the main body 37, the opening 45 is closed by the plate portion 48. A part of the opening 45 is not blocked by the plate part 48, and an opening 59 is formed between the side edge 48 c of the plate part 48 and the main body 37. A part of the attachment portion 30 in the length direction is disposed outside the cover 36 through the opening 59.

  On the other hand, a cap 60 integrally formed of synthetic resin is attached to a portion of the pivot shaft 23 exposed to the outside of the cover 36. The cap 60 is a seal member that prevents water from entering between the pivot shaft 23 and the cylindrical portion 42. The cap 60 includes an annular plate portion 61, a cylindrical portion 62 that is continuous with the inner peripheral edge of the plate portion 61, and a skirt portion 63 that is disposed concentrically with the cylindrical portion 62. The skirt portion 63 is continuous with the plate portion 61 and has a cylindrical shape. The skirt portion 63 extends from the plate portion 61 in the direction opposite to the cylindrical portion 62.

  Further, the inner diameter of the cylindrical portion 62 is sized to be press-fitted into the pivot shaft 23, and the inner diameter of the skirt portion 63 is larger than the outer diameter of the cylindrical portion 42. That is, when the cap 60 is fixed to the pivot shaft 23, the skirt portion 63 is disposed outside the cylindrical portion 42. In addition, the arrangement range of the skirt portion 63 and the arrangement range of the cylindrical portion 42 partially overlap in the direction along the rotation center line A1.

  Next, the operation of the wiper device 12 will be described. The power of the electric motor 18 is distributed to the link mechanisms 16 and 17 via the speed reduction mechanism 19. In the link mechanism 16, the operating force of the link 32 is transmitted to the arm 31, and the pivot shaft 23 rotates forward and backward within a predetermined angle range. The power of the link mechanism 17 is transmitted to the pivot shaft 24, and the pivot shaft 24 rotates forward and backward within a predetermined angle range. For this reason, the wiper arms 14 and 15 operate and the front window 11 is wiped off. The wiper arm 14 wipes the left side of the front window 11 when the vehicle 10 is viewed from the front, and the wiper arm 15 wipes the right side of the front window 11 when the vehicle 10 is viewed from the front.

  Further, when water flows along the front window 11 or the louver, and a part of the water falls from above the pivot shaft 23, the water flows along the groove 41 of the cover 36 and from the discharge port 41a. Discharged. Here, the discharge port 41a is disposed outside the operating range of the link mechanism 16 regardless of whether the link mechanism 16 is operating or when the link mechanism 16 is stopped. Further, in both the case where the link mechanism 16 is operating and the case where the link mechanism 16 is stopped, the arrangement range of the cover 36 in the front-rear direction of the vehicle body 25 includes the operation range of the arm 31. Therefore, it is possible to prevent water from adhering to the arm 31, and it is possible to prevent water from adhering to the connecting portion between the arm 31 and the link 32.

  Further, the cover 36 has a main body 37 and an auxiliary piece 53, and the auxiliary piece 53 is fixed to the main body 37. The attachment portion 30 is disposed in an opening 59 formed between the auxiliary piece 53 and the wall portion 38. For this reason, the cover 36 does not move in the direction along the rotation center line A1 with respect to the pivot shaft 23. In particular, when the auxiliary piece 53 comes into contact with the attachment portion 30, the cover 36 serves as a retaining mechanism that prevents the cover 36 from moving away from the arm 31. Therefore, it is possible to reliably prevent water from adhering to the arm 31 and water from adhering to the connecting portion between the arm 31 and the link 32. That is, the auxiliary piece 53 serves both as a retaining mechanism and as a waterproof mechanism.

  Further, when the auxiliary piece 53 is fixed to the main body 37, the plate portion 48 and the support walls 37a and 37b overlap. For this reason, water can be prevented from entering the space in which the arm 31 is disposed through the gap between the plate portion 48 and the wall portion 38.

  Furthermore, the skirt part 63 is arranged outside the cylinder part 42, and the arrangement range of the skirt part 63 and the arrangement range of the cylinder part 42 overlap in a direction along the rotation center line A1. For this reason, water can be prevented from entering the holding hole 43 from above the cylindrical portion 42. That is, the gap formed between the skirt portion 63 and the cylindrical portion 42 functions as a labyrinth seal. Therefore, it is possible to prevent water from entering the shaft hole 28 from above the cylinder portion 29. In addition, since the O-ring 35 is provided under the cylinder part 29, water can be prevented from entering the shaft hole 28 from below the cylinder part 29.

  Next, an operation of removing the cover 36 from the support member 21 in a state where the wiper arm 14 is not attached to the pivot shaft 23 will be described. When the operator operates the operation piece 51 and the projection 52 is removed from the wall portion 38, the insertion piece 50 is extracted from the insertion hole 47, the insertion piece 49 is extracted from the insertion hole 46, and the auxiliary piece 53 is removed from the main body 37. Can do. Then, when the main body 37 is moved along the rotation center line A <b> 1 in a direction away from the arm 31, the main body 37 can be detached from the support member 21. In this way, the cover 36 can be removed from the support member 21.

  Further, an operation of attaching the cover 36 to the support member 21 in a state where the wiper arm 14 is not attached to the pivot shaft 23 will be described. The main body 37 and the auxiliary piece 53 are disassembled in advance. Then, the main body 37, the pivot shaft 23, and the support member 21 are relatively moved in the direction along the rotation center line A1, and the pivot shaft 23 and the cylindrical portion 29 are inserted into the holding hole 43. In this way, the attachment portion 30 is disposed in the opening 45 of the main body 37.

  Next, the auxiliary piece 53 is brought close to the main body 37, the insertion piece 49 is inserted into the insertion hole 46, and the auxiliary piece 53 is rotated with the insertion piece 49 as a fulcrum. Then, the operation piece 51 comes into contact with the wall portion 38 and elastically deforms, and the insertion piece 50 is inserted into the insertion hole 47. Thereafter, the operation piece 51 is restored to its original shape, the protrusion 52 is engaged with the wall portion 38, and the auxiliary piece 53 is attached to the main body 37. In this way, the opening 45 of the main body 37 is blocked by the auxiliary piece 53, and the attachment portion 30 is disposed in the opening 59.

  Another example of the cover 36 will be described with reference to FIGS. The cover 36 includes a main body 37 and an auxiliary piece 53a. The auxiliary piece 53 a is connected to the main body 37 via a hinge 65. That is, the auxiliary piece 53a and the main body 37 are integrated. An opening 45 a is provided in the wall portion 38 of the main body 37, and the auxiliary piece 53 a can operate with the hinge 65 as a fulcrum. The opening 45a can be opened and closed by operating the auxiliary piece 53a. Other configurations of the main body 37 and the auxiliary piece 53a shown in FIGS. 8 and 9 are the same as those of the main body 37 and the auxiliary piece 53 shown in FIGS.

  Next, an operation of removing the cover 36 of FIG. 8 from the support member 21 in a state where the wiper arm 14 is not attached to the pivot shaft 23 will be described. When the operator operates the operation piece 51 to remove the projection 52 from the wall portion 38 and move the auxiliary piece 53a toward the outside of the cover 36 around the hinge 65, the opening 45a is opened. The subsequent work is the same as the work for removing the main body 37 of FIG.

  Further, an operation of attaching the cover 36 to the support member 21 in a state where the wiper arm 14 is not attached to the pivot shaft 23 will be described. The auxiliary piece 53a is stopped outside the cover 36, and the opening 45a is opened. Then, the main body 37, the pivot shaft 23, and the support member 21 are relatively moved in the direction along the rotation center line A1, and the pivot shaft 23 and the cylindrical portion 29 are inserted into the holding hole 43. In this manner, the attachment portion 30 is disposed in the opening 45 a of the main body 37. Next, when the auxiliary piece 53a is operated using the hinge 65 as a fulcrum and is brought close to the main body 37, the opening 45a of the main body 37 is closed by the auxiliary piece 53a. In the cover 36 shown in FIGS. 8 and 9, the same effect as the cover 37 in FIGS. 2 to 4 can be obtained.

  The correspondence between the configuration of the present embodiment and the configuration of the present invention will be described. The wiper arm 14 corresponds to the wiper arm of the present invention, the pivot shaft 23 corresponds to the pivot shaft of the present invention, and the main body 37 and the auxiliary piece. 53 and 53a correspond to the movement preventing mechanism of the present invention, the tube portion 29 corresponds to the first tube portion of the present invention, the tube portion 42 corresponds to the second tube portion of the present invention, and the wall portion 38. , 39 and the groove 41 correspond to the guide element of the present invention, and the link mechanism 16 corresponds to the power transmission mechanism of the present invention. The electric motor 18 corresponds to the power source of the present invention, the link 32 corresponds to the first transmission member of the present invention, the arm 31 corresponds to the second transmission member of the present invention, and the rib 44 The cap 60 corresponds to the protrusion of the present invention and the seal member of the present invention.

  It goes without saying that the drive unit of the present invention is not limited to the above-described embodiment, and can be variously modified without departing from the gist thereof. For example, in the above-described embodiment, the first means has been described in which the main body 37 and the auxiliary piece 53 provided separately are combined and fixed to form the cover 36. On the other hand, the present invention also includes a second means for integrally forming the cover 36 having the cylindrical portion 42, the holding hole 43, the opening 59, the wall portions 38, 39, 40, the groove 41 and the like with a soft resin. When performing the work of attaching or removing this integrated cover to the support member, by deforming the cover, the pivot shaft and the support member are inserted into the holding hole, and the attachment part is disposed in the window part. Can do. The power transmission mechanism of the present invention includes an arm, a link, a rod, a lever, a shaft, and the like. In the present invention, the cover covering the power transmission mechanism means that a cover is provided on the power transmission mechanism in the direction along the vertical line.

  The wiper device of the present invention is also applicable to a wiper device for a vehicle traveling on a road, a wiper device for a railway vehicle, and a wiper device for an airplane. The cover and the sealing member in the present invention prevent foreign matters such as water, mud, and dust from entering. The wiper device of the present invention includes a structure in which a cover is attached to a support member that supports a wiper arm that wipes the right side of the front window when the vehicle is viewed from the front. Furthermore, the wiper device in the present invention includes a wiper device for wiping the rear window in addition to a wiper device for wiping the front window.

DESCRIPTION OF SYMBOLS 10 Vehicle 11 Front window 12 Wiper device 13 Driving device 14, 15 Wiper arm 16, 17 Link mechanism 18 Electric motor 19 Reduction mechanism 20 Frame 21, 22 Support member 23, 24 Pivot shaft 25 Car body 26, 27 Bracket 28 Shaft hole 29, 42 Tube portion 30 Mounting portion 31 Arm 32 Link 33 Connecting pin 34 Bushing 35 O-ring 36 Cover 37 Main body 37a, 37b Support wall 38, 39, 40 Wall portion 38a Notch portion 41 Groove 41a Discharge port 42 Tube portion 43 Holding hole 44 Rib 45, 45a, 59 Opening 46, 47 Insertion hole 48, 61 Plate part 48a, 48b, 48c Side edge 49, 50 Insertion piece 51 Operation piece 52 Projection 53, 53a Auxiliary piece 60 Cap 62 Cylindrical part 63 Skirt part 64 Nut 65 Hinge A1 rotation center line

Claims (7)

A wiper device comprising: a pivot shaft to which a wiper arm is attached; a support member that rotatably supports the pivot shaft; and a power transmission mechanism that transmits power from a power source to the pivot shaft.
And a cover which covers the pre-Symbol power transmission mechanism,
A movement preventing mechanism for preventing the cover from moving in a direction along a rotation center line of the pivot shaft;
I have a,
The support member is
A first tube portion having a shaft hole in which the pivot shaft is disposed;
A mounting portion protruding from the outer peripheral surface of the first tube portion in the radial direction of the pivot shaft and fixed to the vehicle body;
With
The cover is
A main body attached to the first tube portion;
An auxiliary piece for closing the opening provided in the main body,
That have a wiper apparatus. The wiper device according to claim 1, wherein
The said cover is a wiper apparatus provided with the guide element which guides a foreign material outside the operation | movement range of the said power transmission mechanism by planar view perpendicular | vertical with respect to a perpendicular line . The wiper device according to claim 1 or 2,
A window portion is formed by the main body and the auxiliary piece, and the attachment portion is disposed in the window portion,
The movement preventing mechanism includes a wiper device including the main body and the auxiliary piece . The wiper device according to any one of claims 1 to 3 ,
The wiper device, wherein the main body and the auxiliary piece overlap around the opening . The wiper device according to any one of claims 1 to 4 ,
The power transmission mechanism is connected to a first transmission member that is operated by power of the power source, and is rotatable with respect to the first transmission member via a connection pin, and the power of the first transmission member is transmitted to the first transmission member. A wiper device including a link mechanism including a second transmission member that transmits to a pivot shaft . The wiper device according to any one of claims 1 to 5 ,
The cover includes a second tube portion having a holding hole in which the first tube portion is disposed,
A wiper device , wherein a protrusion for positioning the first tube portion in a radial direction is provided on an inner surface of the second tube portion . The wiper device according to any one of claims 1 to 6,
A wiper device attached to a portion of the pivot shaft exposed to the outside of the cover and provided with a seal member for sealing between the cover and the pivot shaft .

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