JP4950925B2 - Wiper device - Google Patents

Description

  The present invention relates to a wiper device that swings and drives a wiper member provided on a windshield to wipe off deposits attached to the windshield.

  Conventionally, a vehicle such as an automobile is equipped with a wiper device for wiping off deposits such as rain and dust attached to a windshield. The wiper device includes a wiper motor that is rotationally driven by operating an operation switch, a pivot shaft that swings and drives the wiper member, and a power transmission member that converts the rotational motion of the wiper motor into a swing motion and transmits the swing motion to the pivot shaft. ing. The pivot shaft is rotatably supported by a pivot holder fixed in a vehicle cowl or the like, and the tip end side thereof extends outward from the vehicle body surface of the vehicle. The tip side of the pivot shaft is susceptible to impact loads. Therefore, when the pivot shaft receives an impact load, the wiper device is designed to absorb the impact load by dropping the pivot shaft into the cowl. Some have a shock absorbing function.

As a wiper device having such an impact absorbing function, for example, the one described in Patent Document 1 is known. The wiper device described in Patent Document 1 employs a so-called modular type wiper device in which pivot holders on the driver's seat side and the passenger seat side are respectively connected by pipes. A motor bracket is fixed to a substantially middle portion of the pipe, and a wiper motor is fixed to the motor bracket. Each pivot holder is provided with a weak portion having a low breaking strength, so that when the pivot shaft receives an impact load, the pipe, the motor bracket and the wiper motor are dropped into the cowl together with the pivot shaft. Thus, the wiper device described in Patent Document 1 has an impact absorbing function that allows the entire wiper device to fall into the cowl.
Japanese Patent Laid-Open No. 2002-200969 (FIG. 2)

  However, according to the wiper device described in Patent Document 1 described above, when the pivot shaft receives an impact load, the entire wiper device is dropped into the cowl. Requires a relatively large space (shock absorbing space). Therefore, the vehicle body design of the vehicle is influenced by the shock absorbing space, and the degree of freedom of design may be reduced, or it may be difficult to apply to a small vehicle having a small engine room.

  An object of the present invention is to provide a wiper device capable of downsizing an impact absorbing space in a cowl.

A wiper device of the present invention is a wiper device that swings and drives a wiper member provided on a windshield to wipe off deposits adhering to the windshield, the wiper motor having an output shaft, and the wiper member fixed Motor bracket having a pivot shaft, a power transmission member provided between the output shaft and the pivot shaft, and transmitting the rotation of the output shaft to the pivot shaft, and a motor fixing portion to which the wiper motor is fixed The base end side is connected to the outer peripheral side of the motor fixing portion, the distal end side is fixed to the object to be mounted, the base end side is connected to the outer peripheral side of the motor fixing portion, and the pivot is connected to the distal end side. and a pivot support portion having a holder tube portion for supporting the shaft rotatably, wherein up the length from the motor fixing portion of the pivot support portion Only set shorter length than the length from the motor fixing portion of the leg portion, the pivot supporting part, cantilevered spaced from said mounting legs toward the circumferential direction of the motor fixing part state And at a distance from the mounting leg in the axial direction of the pivot shaft.

  The wiper device according to the present invention is characterized in that a pair of the mounting legs are provided on the motor fixing part, and the pivot support part is disposed between the mounting legs in the circumferential direction of the motor fixing part.

  The wiper device according to the present invention is characterized in that the pivot support portion has a fragile portion that breaks when a load of a predetermined value or more is applied to the pivot shaft.

  In the wiper device of the present invention, the pivot shaft includes a movement allowing member that allows the pivot shaft to move in the axial direction with respect to the pivot support portion when a load of a predetermined value or more is applied to the pivot shaft. And

According to the wiper device of the present invention, the mounting leg is connected to the outer peripheral side of the motor fixing portion of the motor bracket, and the pivot support portion having a shorter length than the mounting leg is disposed in the circumferential direction of the motor fixing portion. together by spaced apart from the mounting legs arranged in a cantilever state with respect to the motor fixing portion toward, so arranged so away from the mounting leg portion in the axial direction of the pivot axis, the shock absorption pivot shaft may fall off A space can be formed between the pivot support and the mounting leg. Therefore, the impact absorption space in the cowl on which the wiper device is mounted can be reduced in size.

  According to the wiper device of the present invention, the motor fixing portion is provided with a pair of mounting legs, and the pivot support portion is disposed between the mounting legs in the circumferential direction of the motor fixing portion. An absorption space can be formed between the pivot support and each mounting leg. Therefore, the impact absorption space in the cowl on which the wiper device is mounted can be reduced in size.

  According to the wiper device of the present invention, the pivot support portion has a fragile portion that breaks when a load of a predetermined value or more is applied to the pivot shaft. Therefore, when the pivot shaft is loaded with a load of a predetermined value or more, it is fragile. The pivot support portion can be broken at the portion, and the pivot shaft and the pivot support portion can be dropped into the shock absorbing space.

  According to the wiper device of the present invention, the pivot shaft has the movement allowing member that allows the pivot shaft to move in the axial direction relative to the pivot support portion when a load of a predetermined value or more is applied to the pivot shaft. When a load of a predetermined value or more is applied, the pivot shaft can be dropped into the shock absorbing space without breaking the pivot support portion.

  Hereinafter, a first embodiment of the present invention will be described in detail with reference to the drawings.

  1 is an explanatory view showing the front side of a vehicle equipped with the wiper device according to the first embodiment, FIG. 2 is a perspective view showing the wiper device of FIG. 1, and FIGS. 3 (a) and 3 (b) are diagrams. The explanatory view explaining the structure of 2 motor brackets is shown, respectively.

  As shown in FIG. 1, a windshield 11 as a windshield is provided on the front side of the vehicle 10, and rain, dust, etc. (attachment) attached to the windshield 11 on the windshield 11. A DR side (driver's seat side) wiper member 12 and an AS side (passenger side) wiper member 13 are provided.

  The DR-side wiper member 12 has a DR-side wiper blade 12a and a DR-side wiper arm 12b, and the DR-side wiper blade 12a is rotatably attached to the distal end side of the DR-side wiper arm 12b. The AS-side wiper member 13 has an AS-side wiper blade 13a and an AS-side wiper arm 13b, and the AS-side wiper blade 13a is rotatably attached to the distal end side of the AS-side wiper arm 13b.

  Each wiper blade 12a, 13a is brought into elastic contact with the windshield 11 by a coil spring (tensile spring) (not shown) provided inside each wiper arm 12b, 13b.

  The wiper blades 12a and 13a perform a reciprocating wiping operation in the same direction in synchronization with each wiping range 11a and 11b formed between the lower inversion position LRP and the upper inversion position URP on the windshield 11. It has become. That is, the wiping pattern of each wiper blade 12a, 13a is a tandem type.

  A wiper device 14 for wiping the windshield 11 is mounted on the front end side of the windshield 11 in the vehicle 10, and the wiper device 14 is disposed in a cowl 15 formed on the front side of the vehicle 10. . The wiper device 14 is covered with a cowl top panel 16 that closes the opening side (front side in the figure) of the cowl 15, and the cowl top panel 16 is provided with a DR side through hole 16a and an AS side through hole 16b. It has been. From each of the through holes 16a and 16b, the distal end sides of the DR side pivot shaft 17a and the AS side pivot shaft 17b constituting the wiper device 14 are extended toward the outside of the vehicle 10.

  As shown in FIG. 2, the wiper device 14 has a so-called so-called motor bracket 40 to which a wiper motor 30 for swinging and driving the wiper members 12 and 13 is fixed to the DR side (right side in the figure) of the frame member 50. A frame-type modular wiper device is used.

  The wiper device 14 includes a DR-side pivot shaft 17a to which the DR-side wiper arm 12b is fixed at the distal end side, and an AS-side pivot shaft 17b to which the AS-side wiper arm 13b is fixed to the distal end side, and the DR-side pivot shaft 17a. Is pivotally supported by the motor bracket 40, and the AS side pivot shaft 17 b is pivotally supported by the pivot holder 18.

  One end side of the DR side drive lever 19a is fixed to the base end side of the DR side pivot shaft 17a, and one end side of the AS side drive lever 19b is fixed to the base end side of the AS side pivot shaft 17b. Between the other end side of the DR side drive lever 19a and the other end side of the AS side drive lever 19b, ball joints (not shown) respectively fixed to the other end sides of the drive levers 19a and 19b are interposed. The end portions of the connecting rod 20 are rotatably connected to each other.

  The motor bracket 40 supports the wiper motor 30 and penetrates the output shaft 31 of the wiper motor 30. Here, the wiper motor 30 includes a speed reduction mechanism (not shown) including a worm and a worm wheel, and outputs the rotational force that has been reduced by the speed reduction mechanism and increased in torque to the outside via the output shaft 31. It is like that. However, as a drive source (not shown) constituting the wiper motor 30, various types of electric motors such as a brushed electric motor and a brushless electric motor can be used.

  A base end side of the link plate 21 bent to have a stepped shape is fixed to the output shaft 31 of the wiper motor 30. A ball joint (not shown) is fixed to the distal end side of the link plate 21, and one end side of the drive rod 22 is rotatably connected to the ball joint. The other end side of the drive rod 22 is rotatably connected to the other end side of the AS side drive lever 19b via a ball joint (not shown).

  Here, a link mechanism (power transmission member) 23 is constituted by the link plate 21, the drive rod 22, the AS side drive lever 19b, the connecting rod 20, and the DR side drive lever 19a. The link mechanism 23 is provided between the output shaft 31 and each of the pivot shafts 17a and 17b. The link mechanism 23 converts the rotational motion of the link plate 21 accompanying the rotational drive of the wiper motor 30 into a swing motion, and each pivot shaft 17a, 17b is transmitted. Therefore, by rotating the wiper motor 30, the wiper blades 12 a and 13 a can be reciprocated in a reciprocating manner within the wiping ranges 11 a and 11 b of the windshield 11.

  As shown in FIG. 3, the motor bracket 40 has a motor fixing portion 41 that is substantially flat. The motor fixing portion 41 is provided with a through hole 41a through which the output shaft 31 of the wiper motor 30 passes from the back surface side (the back side in the drawing) toward the front surface side (the near side in the drawing). Around the through hole 41a, three screw holes 41b through which fixing screws 24 (see FIG. 2) for fixing the wiper motor 30 to the motor fixing portion 41 pass are provided at substantially equal intervals (approximately 120 ° intervals). Yes.

  A frame mounting portion 42 having a substantially arc-shaped cross section is integrally provided on the outer peripheral side of the motor fixing portion 41, and an end portion on the DR side of the frame member 50 is a pair of screw members. 25 (see FIG. 2).

  The base end side of a pair of mounting leg portions 43 extending outward is connected to the outer peripheral side of the motor fixing portion 41, and the distance between the distal end sides of the mounting leg portions 43 is set to a predetermined width dimension W. ing. As shown in FIG. 2, each attachment leg 43 plays a role of fixing the motor bracket 40 to the DR-side vehicle body panel (object to be attached) P <b> 1 of the vehicle 10, and the front end side of each attachment leg 43. Are fitted with rubber bushes 26, respectively. A fastening bolt (not shown) is inserted into each bush 26, and the fastening bolt is fixed to the DR-side vehicle body panel P1, whereby the motor bracket 40 is fixed to the DR-side vehicle body panel P1.

  A base end side of a pivot support portion 44 extending outward is connected to the outer peripheral side of the motor fixing portion 41. The pivot support 44 is set to a length shorter than the length of each mounting leg 43. As shown in FIG. 3A, the pivot support portion 44 is disposed between the mounting leg portions 43 in the circumferential direction of the motor fixing portion 41, and as shown in FIG. It is arranged in a cantilever state extending from the motor fixing portion 41 so as to be separated from the front end side of each mounting leg portion 43 by a predetermined height dimension H toward the axial direction of 17a.

  Thereby, a substantially rectangular parallelepiped-shaped shock absorbing space S having a width dimension W, a height dimension H, and a depth dimension L is formed between each mounting leg portion 43 and the pivot support portion 44. This shock absorbing space S functions as a space (shock absorbing function) that allows the DR side pivot shaft 17a to drop off when a load (impact load) of a predetermined value or more is applied to the DR side pivot shaft 17a. is there.

  The width dimension W of the shock absorbing space S is set so as to be within the width dimension on the tip side of each mounting leg 43, so that the shock absorbing space S has a necessary minimum volume, The increase in size of the wiper device 14 is suppressed.

  A holder tube portion 44a that integrally supports the DR side pivot shaft 17a via a bearing (not shown) provided inside thereof is integrally provided on the distal end side of the pivot support portion 44. On one end side (upper side in the figure) of the holder cylinder portion 44a, a movement restricting member 27 that restricts the movement of the DR side pivot shaft 17a in the axial direction with respect to the holder cylinder portion 44a is provided. The movement restricting member 27 is fixed to a substantially intermediate portion between the washer 28 having an inner diameter larger than that of the DR side pivot shaft 17a and having an outer diameter larger than the inner diameter of the holder cylinder portion 44a, and the DR side pivot shaft 17a. The retaining ring 29 is larger than the inner diameter of the inner ring.

  A thin portion (fragile portion) 44 b is formed so as to cross the substantially width direction of the pivot support portion 44 between the base end side of the pivot support portion 44, that is, between the pivot support portion 44 and the motor fixing portion 41. Yes. The thin wall portion 44b is set to be lower in rigidity than other portions of the pivot support portion 44, and is torn when an impact load is applied to the DR side pivot shaft 17a. The rigidity of the thin portion 44b is determined by the thickness dimension of the thin portion 44b, and the thickness dimension is set in accordance with the shock absorbing performance of the DR side pivot shaft 17a.

  As shown in FIG. 2, the pivot holder 18 is provided with a holder cylinder portion 18a that rotatably supports the AS-side pivot shaft 17b via a bearing (not shown) provided on the inside thereof. A pair of mounting legs 18b for fixing the pivot holder 18 to the AS-side vehicle body panel P2 of the vehicle 10 is provided on the outer peripheral side of the holder cylinder portion 18a. Each mounting leg 18b is fitted with a bush 26 similar to that on the DR side, and a fastening bolt (not shown) is inserted into each bush 26, and the fastening bolt is fixed to the AS-side vehicle body panel P2. Thus, the pivot holder 18 is fixed to the AS-side vehicle body panel P2.

  Further, the pivot holder 18 is integrally provided with a connecting boss 18c to which the end of the frame member 50 on the AS side (left side in the figure) is fitted and fixed.

  Between the motor bracket 40 and the pivot holder 18, a frame member 50 made of a hollow cylindrical pipe extending in the vehicle width direction of the vehicle 10 is provided. The frame member 50 connects the motor bracket 40 and the pivot holder 18 to each other. They are connected to each other at a predetermined relative position. Therefore, by preparing the frame members 50 having different lengths, it is possible to deal with various vehicles having different dimensions in the vehicle width direction. However, the frame member 50 is not limited to a hollow cylindrical pipe, and a hollow member having another shape such as a hexagonal cross-section can be used in consideration of rigidity required for the frame member 50, for example.

  Next, the operation of the wiper device 14 configured as described above will be described in detail with reference to the drawings.

  4 is an explanatory view for explaining a state before the thin portion is broken as viewed from the direction of arrow A in FIG. 2, and FIG. 5 is an explanatory view for explaining a state after the thin portion is broken as viewed from the direction of arrow A in FIG. Respectively.

  As shown in FIG. 4, when an impact load F (arrow in the figure) is applied to the DR side wiper arm 12b, the impact load F is applied in the axial direction of the DR side pivot shaft 17a via the DR side wiper arm 12b. Then, since the DR side pivot shaft 17a is restricted in movement in the axial direction with respect to the holder tube portion 44a by the movement restriction member 27 and is cantilevered by the pivot support portion 44, the pivot support portion 44 is provided. Is bent in the direction of arrow B in the figure.

  As a result, stress concentrates on the thin wall portion 44b of the pivot support portion 44 and a crack C is generated. Here, the crack C is formed substantially linearly along the thin portion 44b as shown in FIG.

  Thereafter, when the load of the impact load F on the DR side pivot shaft 17a is continued, as shown in FIG. 5, the crack C becomes large and the thin portion 44b is completely broken, that is, the pivot support portion 44 and the motor fixing portion. 41 is separated. In addition, the shaded part in FIG. 5 shows the fracture surface of the thin part 44b.

  When the pivot support portion 44 and the motor fixing portion 41 are separated, the pivot support portion 44 moves in the direction of the arrow M in the figure, and the base end side of the DR side pivot shaft 17a including the pivot support portion 44 is the DR side drive lever. It enters into the shock absorbing space S together with 19a. As a result, the tip end side of the DR side pivot shaft 17a moves inward of the cowl 15 by the height dimension h1, and the impact is absorbed.

  Here, between the wiper motor 30 fixed to the motor fixing portion 41 and the DR side pivot shaft 17a rotatably supported by the pivot support portion 44, components are connected rotatably by a ball joint. Therefore, the impact load F is not transmitted to the wiper motor 30. That is, the pivot support portion 44 is smoothly moved in the direction of arrow M after the thin portion 44b is broken, and damage to other components such as the link mechanism 23 and the wiper motor 30 can be suppressed.

As described above in detail, according to the wiper device 14 according to the first embodiment, the mounting legs 43 and the shorter lengths than the mounting legs 43 are provided on the outer peripheral side of the motor fixing portion 41 of the motor bracket 40. The base end sides of the pivot support portions 44 having the same dimension are connected to each other, and the pivot support portions 44 are arranged in the circumferential direction of the motor fixing portion 41 so as to be separated from the respective attachment leg portions 43 between the respective attachment leg portions 43. In addition, since the DR-side pivot shaft 17a is disposed away from each mounting leg 43 in the axial direction of the DR-side pivot shaft 17a, the shock absorbing space S from which the DR-side pivot shaft 17a can be dropped is provided with the pivot support portion 44 and each mounting leg. It can be formed between the portion 43.

  Therefore, the impact absorbing space in the cowl 15 on which the wiper device 14 is mounted can be reduced in size, and the degree of freedom in design of the vehicle 10 is reduced, or application to a small vehicle with a small engine room is difficult. Can be eliminated.

  Further, according to the wiper device 14 according to the first embodiment, the pivot support portion 44 has the thin portion 44b that is broken by the impact load F applied to the DR side pivot shaft 17a. When the impact load F is applied, the pivot support portion 44 can be broken at the thin portion 44b, and the DR side pivot shaft 17a and the pivot support portion 44 can be dropped into the impact absorbing space S.

  Therefore, when the pivot support portion 44 drops into the shock absorbing space S, the DR side pivot shaft 17a can be tilted together with the pivot support portion 44, so that the amount of movement of the DR side pivot shaft 17a into the cowl 15 on the tip side is increased. As a result, sufficient shock absorbing performance can be obtained.

  Next, a second embodiment of the present invention will be described in detail with reference to the drawings.

  FIGS. 6A and 6B are explanatory views for explaining the operation of the movement allowing member of the wiper device according to the second embodiment, and FIG. 7 is an explanatory view for explaining the structure of the C-type retaining ring of FIG. FIG. 8 is an explanatory view for explaining a modified example (E-type retaining ring) of the movement allowing member of FIG. In addition, the same code | symbol is attached | subjected about the part which has the same function as 1st Embodiment mentioned above, and the detailed description is abbreviate | omitted.

  Compared with the first embodiment described above, the wiper device 14 according to the second embodiment omits the thin portion 44b of the pivot support portion 44, and the impact load F is applied in the axial direction of the DR side pivot shaft 17a. The difference is that the DR side pivot shaft 17a can move in the axial direction with respect to the holder tube portion 44a when loaded.

  As shown in FIG. 6, an annular groove 60 is formed in the DR side pivot shaft 17a. The annular groove 60 gradually increases from the groove bottom 61 to the upper side in the figure from the groove bottom 61. And an annular taper portion 62 having a diameter.

  A movement allowing member 70 is attached to the annular groove 60. The movement allowing member 70 includes a washer 28 and a C-type retaining ring 71 fitted to the groove bottom 61. As shown in FIG. 7, the C-type retaining ring 71 is formed in a substantially C shape by pressing a thin steel plate, and is elastically deformed in the direction indicated by a broken line arrow in the figure. A pair of jig mounting holes 71a is provided at the end of the C-type retaining ring 71. By attaching a jig (not shown) to the jig mounting hole 71a, the C-type retaining ring 71 is moved radially outward. Thus, the C-type retaining ring 71 is fitted into the groove bottom 61. Here, although what was shape | molded by press work was used as the C-type retaining ring 71, you may use what shape | molded the linear steel material which has elasticity, and was shape | molded in C shape so that it might have a notch. .

  The operation of the wiper device 14 of the second embodiment configured as described above will be described.

  As shown in FIG. 6A, when an impact load F (arrow in the figure) is applied in the axial direction of the DR side pivot shaft 17a, the DR side pivot shaft 17a moves downward in the figure with respect to the holder cylinder portion 44a. In other words, the C-type retaining ring 71 rides on the tapered portion 62 with the movement to the shock absorbing space S (see FIG. 2). Then, the C-type retaining ring 71 comes off from the groove bottom 61 under the state of being elastically deformed in the direction of arrow D in the drawing.

  As a result, as indicated by an arrow M in FIG. 6B, movement of the DR side pivot shaft 17a in the axial direction with respect to the holder cylinder portion 44a is allowed, and the base end side of the DR side pivot shaft 17a is located at the DR side drive lever 19a. At the same time, it enters the shock absorbing space S. As a result, the tip end side of the DR side pivot shaft 17a moves to the inside of the cowl 15 by the height dimension h2, and the impact is absorbed.

  As described above in detail, according to the wiper device 14 according to the second embodiment, the impact absorbing space in the cowl 15 on which the wiper device 14 is mounted is reduced in size, as in the first embodiment described above. Therefore, it is possible to solve the problem that the degree of freedom in design of the vehicle 10 is reduced, and that it is difficult to apply to a small vehicle having a small engine room.

  In addition, in the second embodiment, the DR-side pivot shaft 17a allows the DR-side pivot shaft 17a to move in the axial direction with respect to the pivot support portion 44 due to the impact load F applied to the DR-side pivot shaft 17a. Therefore, when the impact load F is applied to the DR side pivot shaft 17a, the DR side pivot shaft 17a can be dropped into the shock absorbing space S without breaking the pivot support portion 44. it can.

  Therefore, it is possible to suppress damages and the like of the respective constituent parts constituting the wiper device 14, and the respective constituent parts can be reused and returned to the original state.

  As shown in FIG. 8, instead of the C-type retaining ring 71, an E-type retaining ring 72 that exhibits the same effect as the C-type retaining ring 71 can be used as the movement allowing member 70.

  The E-type retaining ring 72 is formed in a substantially E shape by pressing a thin steel plate, and has three elastic deformation portions 72a on the inner peripheral side thereof. The inner diameter dimension of each elastic deformation portion 72 a is set to be smaller than the outer diameter dimension of the groove bottom portion 61, and each elastic deformation portion 72 a can be pressed against the groove bottom portion 61. A pair of tapered portions 72b are formed at the end of the E-type retaining ring 72, and the E-type retaining ring 72 is pressed by pressing each tapered portion 72b toward the groove bottom portion 61 from the radial direction with a predetermined pressure. It fits into the groove bottom 61 while being elastically deformed.

  It goes without saying that the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the scope of the invention. For example, in the first embodiment, the fragile portion provided in the pivot support portion 44 is shown as the thin portion 44b in which the thickness is reduced and the rigidity is reduced. However, the present invention is not limited to this. Alternatively, at least one hole may be formed at a location where the pivot support portion 44 is to be broken, thereby forming a fragile portion.

  In each of the above embodiments, the wiper device 14 provided with the motor bracket 40 on the driver's seat side (DR side) is shown. However, the present invention is not limited to this, and the passenger seat side (AS side). A wiper device in which the motor bracket 40 is provided may be used.

  Further, in each of the above embodiments, the wiping pattern of the wiper device 14 is shown as a tandem type. However, the present invention is not limited to this, and other wiping patterns such as a counter wiping type may be used.

  Moreover, in the said embodiment, although what wiped the windshield 11 of the front side of the vehicle 10 was shown as a wiper apparatus, this invention is not restricted to this, The windshield provided in the back side of the vehicle 10, or The present invention can also be applied to a wiper device for wiping a windshield of a railway vehicle or an aircraft.

It is explanatory drawing which shows the front side of the vehicle carrying the wiper apparatus which concerns on 1st Embodiment. It is a perspective view which shows the wiper apparatus of FIG. (A), (b) is explanatory drawing explaining the structure of the motor bracket of FIG. It is explanatory drawing explaining the state before the fracture | rupture of the thin part seen from the arrow A direction of FIG. It is explanatory drawing explaining the state after a fracture | rupture of the thin part seen from the arrow A direction of FIG. (A), (b) is explanatory drawing explaining the action | operation of the movement permission member of the wiper apparatus which concerns on 2nd Embodiment. It is explanatory drawing explaining the structure of the C-type retaining ring of FIG. It is explanatory drawing explaining the modification (E-type retaining ring) of the movement permission member of FIG.

Explanation of symbols

10 Vehicle 11 Windshield (windshield)
11a, 11b Wiping range 12 DR side wiper member (wiper member)
12a DR side wiper blade 12b DR side wiper arm 13 AS side wiper member (wiper member)
13a AS side wiper blade 13b AS side wiper arm 14 Wiper device 15 cowl 16 cowl top panel 16a DR side through hole 16b AS side through hole 17a DR side pivot shaft (pivot shaft)
17b AS side pivot shaft 18 Pivot holder 18a Holder tube portion 18b Mounting leg portion 18c Connection boss 19a DR side drive lever 19b AS side drive lever 20 Connection rod 21 Link plate 22 Drive rod 23 Link mechanism (power transmission member)
24 fixing screw 25 screw member 26 bush 27 movement restricting member 28 washer 29 retaining ring 30 wiper motor 31 output shaft 40 motor bracket 41 motor fixing portion 41a through hole 41b screw hole 42 frame mounting portion 43 mounting leg portion 44 pivot support portion 44a holder cylinder Part 44b Thin part (fragile part)
50 frame member 60 annular groove 61 groove bottom part 62 taper part 70 movement allowing member 71 C-type retaining ring 71a jig mounting hole 72 E-type retaining ring 72a elastic deformation part 72b taper part C crack F impact load (load greater than a predetermined value)
S Shock absorption space P1 DR side body panel (object to be mounted)
P2 AS side vehicle body panel LRP Lower reverse position URP Upper reverse position

Claims (4)

A wiper device that swings and drives a wiper member provided on the windshield, and wipes off deposits attached to the windshield,
A wiper motor having an output shaft;
A pivot shaft to which the wiper member is fixed;
A power transmission member provided between the output shaft and the pivot shaft, and transmitting the rotation of the output shaft to the pivot shaft;
A motor bracket having a motor fixing portion to which the wiper motor is fixed;
A base end side is connected to the outer peripheral side of the motor fixing portion, and a tip end side is fixed to an attachment target, and a mounting leg portion;
A proximal end side connected to the outer peripheral side of the motor fixing portion, and a pivot support portion having a holder tube portion rotatably supporting the pivot shaft on the distal end side;
A length dimension of the pivot support part from the motor fixing part is set to a length dimension shorter than a length dimension of the mounting leg part from the motor fixing part, and the pivot support part is set to the length of the motor fixing part . A wiper device characterized in that the wiper device is arranged in a cantilevered state spaced apart from the mounting leg portion in the circumferential direction and is separated from the mounting leg portion in the axial direction of the pivot shaft.   2. The wiper device according to claim 1, wherein a pair of the mounting legs are provided on the motor fixing part, and the pivot support part is disposed between the mounting leg parts in a circumferential direction of the motor fixing part. Wiper device to do.   3. The wiper device according to claim 1, wherein the pivot support portion includes a fragile portion that breaks when a load of a predetermined value or more is applied to the pivot shaft. 4. 3. The wiper device according to claim 1, wherein the pivot shaft includes a movement allowing member that allows the pivot shaft to move in the axial direction relative to the pivot support portion when a load of a predetermined value or more is applied to the pivot shaft. A wiper device comprising:

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