JP2009083812A - Wiper pivot and wiper device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a wiper pivot and a wiper device capable of absorbing an impact load by sufficiently deforming a vehicle body. <P>SOLUTION: It is possible to lengthen a pivot shaft 20 and to keep a position of a main holder 16A away from a tip end part of the pivot shaft 20 in a state securing supporting strength to support a wiper arm 100 by providing a sub holder 16B between the main holder 16A to support a proximal end of the pivot shaft 20 and the distal end part of the pivot shaft 20 on which the wiper arm 100 is fixed. Consequently, it is possible to arrange the main holder 16A at a position separated from an outer plate of the vehicle body and additionally to arrange a wiper motor, a link rod, a hollow frame, etc. at the position separated from the outer plate of the vehicle body. Accordingly, it is possible to absorb the impact load by sufficiently deforming the vehicle body as the wiper motor, the link rod, the hollow frame, etc. are arranged at the position separated from the outer plate of the vehicle body even when the impact load works on the vehicle body from above a vehicle. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a wiper pivot in which a wiper for wiping a windshield glass or the like of a vehicle is attached to a front end portion, and a wiper device including the wiper pivot.

  A wiper device for wiping a windshield glass of an automobile includes a wiper pivot on which a wiper is attached to a driver seat side and a passenger seat side. The wiper pivot is provided with a pivot shaft on which the wiper is fixed and reciprocally rotated, and a pivot holder attached to the vehicle body and rotatably supporting the pivot shaft.

  Furthermore, a frame member is provided for connecting the driver seat side and passenger seat side pivot holders, and a wiper motor for applying a driving force to the pivot shaft is attached to the frame member (see Patent Document 1).

  Here, when an impact load is applied to the vehicle body in which the wiper device is disposed from above the vehicle, the frame member and the wiper motor provided in the wiper device receive the impact load, and the impact absorption due to the deformation of the vehicle body is absorbed. It may not be done sufficiently.

In Patent Document 2, by providing a space below the wiper device, when an impact load is applied from above the vehicle, the frame member or the like moves to the lower space due to the impact load, thereby deforming the vehicle body. A structure that absorbs shock is proposed.
JP 2001-071871 A Japanese Patent Laid-Open No. 2002-200969

  However, according to this structure, the fixed part to the vehicle body such as the wiper pivot is broken by the impact load and moved downward. If the fixed part is not broken, sufficient deformation of the vehicle body is prevented. There is a risk of being. Although it is conceivable to arrange the wiper device in the lower space portion in advance, it is necessary to make the pivot shaft long, and the pivot shaft is inclined by the reaction force of the wiping load due to snow accumulation or the like. May be destroyed.

  In consideration of the above facts, the present invention does not impede sufficient absorption of a collision load due to deformation of the vehicle body, such as during a vehicle collision, and has a wiper pivot and a wiper having sufficient support strength against a wiping load due to snow accumulation or the like. The problem is to provide an apparatus.

  A wiper pivot according to claim 1 of the present invention includes a pivot shaft to which a wiper for wiping the wiping surface is fixed at a tip portion, a cylindrical pivot holder fixed to a vehicle body, and rotatably supporting the pivot shaft; The pivot holder includes a main holder that supports a base end portion of the pivot shaft, and a sub-holder that supports the pivot shaft that is spaced apart from the main holder and protrudes from the main holder. It is characterized by providing.

  According to the above structure, the pivot shaft is rotatably supported by the pivot holder fixed to the vehicle body, and the wiper for wiping the wiping surface is fixed to the distal end portion of the pivot shaft.

  Further, the pivot holder is provided with a main holder for supporting the base end portion of the pivot shaft and a sub-holder for supporting the pivot shaft protruding from the main holder.

  In other words, by providing a sub-holder between the main holder that supports the base end of the pivot shaft and the tip of the pivot shaft to which the wiper is fixed, the pivot shaft is lengthened while ensuring the support strength to support the wiper. Thus, the position of the main holder can be moved away from the tip of the pivot shaft.

  By moving the position of the main holder away from the tip of the pivot shaft, the main holder can be disposed at a position away from the outer plate of the vehicle body. Accordingly, the wiper motor that drives the pivot shaft, the link member that transmits the driving force of the wiper motor to the pivot shaft, the frame member that supports the wiper motor, and the like can also be arranged at positions away from the outer plate of the vehicle body.

  For this reason, even if an impact load is applied to the vehicle body from above the vehicle, the wiper motor, the link member, the frame member, and the like are arranged at positions away from the outer plate of the vehicle body, thereby preventing sufficient deformation of the vehicle body. Can absorb impact load.

  A wiper device according to a second aspect of the present invention includes the wiper pivot according to the first aspect, and a wiper motor that applies a driving force to a pivot shaft provided on the wiper pivot.

  According to the said structure, a wiper motor provides a driving force to the pivot axis | shaft provided in the wiper pivot of Claim 1.

  Since the wiper pivot according to claim 1 is employed and the wiper motor for driving the pivot shaft of the wiper pivot can be disposed at a position away from the outer plate of the vehicle body, an impact load acts on the vehicle body from above the vehicle. However, the vehicle body can be sufficiently deformed to absorb the impact load.

  According to a third aspect of the present invention, there is provided a wiper device that connects the pair of wiper pivots according to the first aspect disposed on the driver's seat side and the passenger's seat side and the main holders provided on the pair of wiper pivots. A wiper motor that is fixed to the frame member and applies a driving force to the pivot shaft, and a link member that transmits the driving force of the wiper motor to the pivot shaft.

  According to the said structure, the wiper pivot of a pair of Claim 1 is arrange | positioned at the driver's seat side and the passenger seat side. Further, a frame member connects the main holder provided on the pair of wiper pivots. The wiper motor fixed to the frame member applies a driving force to the wiper shaft of the wiper pivot through the link member.

  Thus, even in the case of a modularized wiper device, the wiper motor, the link member, the frame member, and the like can be arranged at positions away from the outer plate of the vehicle body by employing the wiper pivot according to claim 1. it can. For this reason, when an impact load is applied to the vehicle body from above the vehicle, the vehicle body is sufficiently deformed to prevent the absorption of the impact load.

  A wiper device 10 employing wiper pivots 24 and 26 according to an embodiment of the present invention will be described with reference to FIGS.

  As shown in FIG. 3, the wiper pivots 24 and 26 provided in the wiper device 10 include a holder fixing bracket 12 and a holder fixing bracket 14. The holder fixing bracket 12 and the holder fixing bracket 14 are formed symmetrically and have the same basic configuration.

  A pivot holder 16 is fixed to the holder fixing bracket 12, and a pivot holder 18 is fixed to the holder fixing bracket 14. The pivot holders 16 and 18 are formed in a cylindrical shape, and a pivot shaft 20 and a pivot shaft 22 are inserted through and supported rotatably.

  Wiper pivots 24 and 26 are configured including the pivot shafts 20 and 22 and the pivot holders 16 and 18. The wiper pivots 24 and 26 and the holder fixing brackets 12 and 14 will be described in detail later.

  Further, as shown in FIG. 2, pivot levers 110 and 112 are fixed to the lower ends of the pivot shafts 20 and 22, respectively, so that the pivot shafts 20 and 22 are rotated by swinging of the pivot levers 110 and 112. It has become.

  Further, on the outer peripheral surface of the pivot holders 16 and 18, on the lower side of the holder fixing brackets 12 and 14 (lower side shown in FIG. 2), a solid front end is connected to a hollow frame 114 described later. Connection shafts 116 and 118 are provided. The distal ends of the connecting shafts 116 and 118 (the side opposite to the pivot holders 16 and 18) are connecting portions 120 and 122 that are fitted and connected to the hollow frame 114. The connecting portions 120 and 122 are each formed with a recess 124.

  Note that these connecting shafts 116 and 118 are not limited to solid shafts having a circular cross section, and may be hollow shafts having a circular cross section.

    On the other hand, both ends in the longitudinal direction of the hollow frame 114 are a connection portion 126 and a connection portion 128 corresponding to the connection portions 120 and 122 of the connection shafts 116 and 118. The cross-sections of these connecting portions 126 and 128 are annular, and the connecting portion 126 fits into the connecting portion 120 and the connecting portion 128 fits into the connecting portion 122, and in this state, corresponds to the recess 124. Thus, the connecting portions 126 and 128 are respectively crimped and connected and fixed to the connecting portions 120 and 122, respectively.

  Thus, the connection part 120 of the connection shaft 116 and the connection part 122 of the connection shaft 118 are connected to each other by the hollow frame 114.

  A mounting portion 60 is formed in the middle portion in the longitudinal direction of the hollow frame 114. As shown in FIG. 4, the mounting portion 60 is formed in a U-shaped cross section that is not hollow, and is set so that the opening side of the U-shape faces right side (the right side in FIG. 4). Furthermore, the side surface (left side of FIG. 4) of the mounting portion 60 is a mounting flat seat surface 62. Further, a pair of attachment holes 64 for fixing a drive source described later is formed in the attachment portion 60 so as to penetrate the front and back of the attachment portion 60.

  In the present embodiment, the hollow frame 114 (see FIG. 3) is, for example, a hollow base material having an annular cross-section with a diameter of 22.2 mm (φ22.2) and a thickness of 1.6 mm (t1.6). (Pipe material) is used to press the predetermined portion, whereby the mounting portion 60 having a U-shaped dimension (height dimension) of 20.6 mm and the other dimension (width dimension) of 10.5 mm is obtained. It has a formed configuration.

  As shown in FIG. 5, a gradual change portion 66 and a gradual change portion 68 are provided on both longitudinal sides of the attachment portion 60 of the hollow frame 114. The gradually changing portions 66 and 68 are formed so as to gradually change from a non-hollow cross-sectional U-shape to a circular cross-section from the mounting portion 60 toward the connecting portions 126 and 128 (see FIG. 2).

  The hollow frame 114 (mounting portion 60, gradually changing portions 66, 68, etc.) is formed by pressing a hollow base material (pipe material) having an annular cross section as described above, and in particular, the gradually changing portion. 66 and 68 are formed simultaneously with the press working for forming the attachment portion 60. Further, the pair of attachment holes 64 of the attachment portion 60 are formed in the same step as the press working process for forming the attachment portion 60.

  Further, as shown in FIG. 3, a wiper motor 70 as a drive source is attached to the attachment flat seat surface 62 of the attachment portion 60 of the hollow frame 114. The wiper motor 70 has a configuration in which a motor portion 70A and a gear portion 70B are integrally provided, and a pair of mounting legs 74 are formed to project from a housing 72 of the gear portion 70B.

  As shown in FIGS. 4 and 5, the attachment foot 74 is formed in a U-shape with the tip 74A facing upward (the upper portion opens), and the intermediate portion 74B has a U-shape with a downward facing opposite to the tip 74A ( The lower end is open), the base end portion 74C side is formed in a downward U-shape, and the fastening hole 76 that penetrates both the distal end portion 74A and the intermediate portion 74B is along the horizontal direction (in other words, It is formed in a direction perpendicular to the mounting flat seat surface 62 of the mounting portion 60 formed in the U-shape of the hollow frame 114. That is, the mounting foot 74 is configured to be molded by the same punching direction as the output shaft 78 of the wiper motor 70 (see FIG. 3).

  The mounting legs 74 are in close contact with the mounting flat seat surface 62 of the mounting portion 60 of the hollow frame 114 and are fastened by bolts 80 and nuts 82 in this state.

  As shown in FIG. 3, the housing 72 of the wiper motor 70 is formed with a positioning pin 84 protruding toward the front side (the upper side in the drawing in FIG. 3 and the rear side in the drawing in FIG. 2). Positioning is performed by inserting into a positioning hole on the vehicle body side (not shown).

  Further, as shown in FIG. 2, the output shaft 78 of the wiper motor 70 protrudes toward the rear surface side of the housing 72 (the rear surface side of the paper surface in FIG. 3 and the lower side of the paper surface in FIG. 2). An arm 86 is attached.

  A link rod 90 and a link rod 92 are connected to the tip of the crank arm 86 via a ball joint 88. One link rod 90 is connected to a pivot lever 110 of the pivot shaft 20 supported by the holder fixing bracket 12 via a ball joint 94. The other link rod 92 is coupled to the pivot lever 112 of the pivot shaft 22 supported by the holder fixing bracket 14 via a ball joint 96 (see FIG. 3).

  As a result, the wiper motor 70 operates and the crank arm 86 rotates, so that the driving force is transmitted to the pivot shafts 20 and 22 via the link rods 90 and 92 and the pivot levers 110 and 42, and the pivot shafts 20 and 22. Each is configured to rotate.

  Further, as shown in FIG. 6, wiper arms 100 and wiper blades 106 are attached to the distal ends of the pivot shafts 20 and 22, respectively, and the wiper arms 100 and wiper blades 106 reciprocate within a predetermined range by the rotation of the respective pivot shafts 20 and 22. It is a configuration.

  Next, the operation of this embodiment will be described.

  As shown in FIGS. 2 and 3, the wiper device 10 includes pivot holders 16 and 18 that rotatably support pivot shafts 20 and 22. The pivot holders 16 and 18 are connected to each other by a hollow frame 114. The wiper motor 70 is directly fixed to 60 (mounting flat seat surface 62), and it is set as a module type wiper apparatus.

  In this state, a positioning pin 84 provided on the housing 72 of the wiper motor 70 is inserted into a positioning hole (not shown) on the vehicle body side for positioning, and the holder fixing brackets 12 and 14 are fixed to the vehicle body to fix the windshield. It is fixed to the vehicle body structural member below the glass 104 (see FIG. 1).

  Further, the pivot shafts 20 and 22 are rotated by the operation of the wiper motor 70, and the wiper arm 100 and the wiper blade 106 are reciprocated within a predetermined range (see FIG. 6) to wipe raindrops and the like on the windshield glass 104.

  Next, the wiper pivots 24 and 26 and the holder fixing brackets 12 and 14 will be described.

  Since the wiper pivot 24 and the wiper pivot 26 have the same configuration, the wiper pivot 24 will be described as a representative.

  As shown in FIG. 1, the wiper pivot 24 includes an outer peripheral circular pivot shaft 20 to which the wiper arm 100 is fixed at the tip, and a cylindrical pivot holder fixed to the vehicle body and rotatably supporting the pivot shaft 20. 16.

  Specifically, the base end portion of the wiper arm 100 is fixed to the distal end of the pivot shaft 20 of the wiper pivot 24 by a nut 28.

  The pivot holder 16 that supports the pivot shaft 20 is disposed so as to be separated from the main holder 16A and a main holder 16A that supports a base end portion (lower end portion shown in FIG. 1) of the pivot shaft 20. A sub-holder 16B is provided to support between the main holder 16A and the tip portion to which the wiper arm 100 is attached.

  A pivot shaft 20 is inserted into the main holder 16A, and the pivot shaft 20 is rotatably supported via a pair of upper and lower cylindrical supports 30A and 30B.

The end face of the support 30A, 30B are press-fitted in the holding power P ₂ to the distal end face, and spaced apart from the rear end face (enters inside) the shaft hole inner peripheral surface of the main holder 16A of main holder 16A . The pivot shaft 20 rotatably supported by the supports 30A and 30B protrudes from the inside to the outside through the opening of the cowl upper panel 102 which is the outer plate of the vehicle body.

  A washer 32 as a stopper member is provided at the tip of the main holder 16A. One washer 32 is spaced from the support 30A, and the outer shape of the washer 32 is larger than the outer peripheral edge of the main holder 16A.

  On the other hand, a cylindrical support 34 is also provided in the sub-holder 16B provided apart from the main holder 16A, and the pivot shaft 20 is rotatably supported via the support 34. Yes.

  On the outer peripheral surfaces of the main holder 16A and the sub holder 16B, a holder fixing bracket 12 for fixing the main holder 16A and the sub holder 16B to the vehicle body is provided.

  The holder fixing bracket 12 includes a main bracket 12A that fixes the main holder 16A to the vehicle body, and a sub bracket 12B that fixes the sub holder 16B to the vehicle body.

  2 and 3, the main bracket 12A has a plate shape with a flange formed on the outer periphery, and the main holder 16A penetrates the main bracket 12A. The main bracket 12A is integrally formed on the outer peripheral surface of the main holder 16A by, for example, aluminum die casting.

  Further, a circular mounting hole 36 is provided in the main bracket 12A. As shown in FIG. 1, a nut 42 welded to a support 40 fixed to the vehicle body is disposed at a position facing the mounting hole 36.

  With this configuration, the main holder 16A can be fixed to the vehicle body by inserting the bolt 38 through the mounting hole 36 and further tightening the nut 38 fixed to the vehicle body.

  Similarly, the sub bracket 12B for fixing the sub holder 16B to the vehicle body is also provided with an attachment hole 44 for fixing to the vehicle body, and welded to a support 46 fixed to the vehicle body at a position facing the attachment hole 44. A nut 48 is disposed.

  With this configuration, the sub-holder 16B can be fixed to the vehicle body by inserting the bolt 50 into the mounting hole 44 and further tightening the nut 50 fixed to the vehicle body.

  As described above, similarly to the wiper pivot 24, the wiper pivot 26 is also provided with the main holder 18A and the sub holder 18B, and the main holder 18A and the sub holder 18B are connected to the vehicle body via the main bracket 14A and the sub bracket 14B. It is supposed to be fixed to.

  Thus, by providing the sub-holder 16B between the main holder 16A that supports the base end of the pivot shaft 20 and the distal end portion of the pivot shaft 20 to which the wiper arm 100 is fixed, the support strength for supporting the wiper arm 100 is increased. In the secured state, the pivot shaft 20 can be lengthened, and the position of the main holder 16A can be moved away from the tip end portion of the pivot shaft 20.

  By moving the position of the main holder 16A away from the tip of the pivot shaft 20, the main holder 16A can be disposed at a position away from the outer plate of the vehicle body (the cowl upper panel 102 in this embodiment). Accordingly, the wiper motor 70, the link rods 90 and 92, the hollow frame 114, and the like shown in FIG. 3 can also be arranged at positions away from the outer plate of the vehicle body.

  For this reason, even if an impact load is applied to the vehicle body from above the vehicle, the wiper motor 70, the link rods 90 and 92, the hollow frame 114, and the like are disposed at positions away from the outer plate of the vehicle body. It can be deformed to absorb the impact load.

  Further, since the sub-holder 16B supports the vicinity of the tip of the pivot shaft 20, even if a wiping load (load in the wiping surface direction) is applied to the pivot shaft 20 by a snow puddle or the like, the pivot shaft 20 is prevented from falling. can do.

  Further, by adjusting the distance between the main holder 16A and the sub-holder 16B, it is possible to cope with pivot shafts of various lengths. Further, the main holder 16A and the sub-holder 16B can be used as main holders of other wiper devices, and Can be shared with the sub-holder.

  Although the present invention has been described in detail with respect to specific embodiments, the present invention is not limited to such embodiments, and various other embodiments are possible within the scope of the present invention. It is clear to the contractor. For example, in the above-described embodiment, the wiper pivots 24 and 26, the link rods 90 and 92, the wiper motor 70 and the like are described as an example, but the wiper pivots 24 and 26, the link rods 90 and 92, The wiper pivot of the present invention may be adopted as a component type in which the wiper motor 70 and the like are separately assembled to the vehicle body.

  In the above embodiment, two wiper pivots provided on the driver's seat side and the passenger's seat side have been described as an example. However, in the case of one wiper pivot provided at an intermediate portion between the driver's seat side and the passenger seat side. The wiper pivot of the present invention may be employed.

It is sectional drawing which showed the wiper pivot which concerns on embodiment of this invention. 1 is a perspective view showing a wiper device employing a wiper pivot according to an embodiment of the present invention, viewed from a direction orthogonal to an output shaft of a wiper motor. It is the perspective view which showed the wiper apparatus by which the wiper pivot which concerns on embodiment of this invention was employ | adopted and was seen from the output-axis direction of the wiper motor. It is sectional drawing which showed attachment of the wiper motor of the wiper apparatus by which the wiper pivot which concerns on embodiment of this invention was employ | adopted. It is the perspective view which showed attachment of the wiper motor of the wiper apparatus by which the wiper pivot which concerns on embodiment of this invention was employ | adopted. It is the schematic block diagram which showed the wiper apparatus by which the wiper pivot which concerns on embodiment of this invention was employ | adopted, and the mode that the wiper blade wiped glass.

Explanation of symbols

16 .... Pivot holder, 16A ... Main holder, 16B ... Sub holder, 18 ... Pivot holder, 18A ... Main holder, 18B ... Sub holder, 20 ... Pivot shaft, 22... Pivot shaft, 24... Wiper pivot, 26 ... Wiper pivot, 70 ... Wiper motor, 86 ... Crank arm (link member), 90 ... Link rod (Link member), 92... Link rod (link member), 100... Wiper arm (wiper), 106... Wiper blade (wiper), 114 .. Hollow frame (frame member)

Claims (3)

In a wiper pivot comprising a pivot shaft on which a wiper for wiping the wiping surface is fixed at a tip portion, and a cylindrical pivot holder fixed to a vehicle body and rotatably supporting the pivot shaft,
The pivot holder is
A main holder that supports the base end of the pivot shaft;
A sub-holder that is disposed away from the main holder and supports the pivot shaft protruding from the main holder;
Wiper pivot characterized by comprising. A wiper pivot according to claim 1;
A wiper motor for applying a driving force to a pivot shaft provided in the wiper pivot;
A wiper device comprising: A pair of wiper pivots according to claim 1 disposed on the driver's seat side and on the passenger seat side,
A frame member for connecting main holders provided on the pair of wiper pivots;
A wiper motor fixed to the frame member and applying a driving force to the pivot shaft;
A link member for transmitting the driving force of the wiper motor to the pivot shaft;
A wiper device comprising:

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