JP2003054379A - Modular type wiper device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent overrunning of a wiper arm at each reversing position. SOLUTION: Main and sub link arms 9, 14 are integrally fixed on pivot shafts 7, 12 of driver seat side and front passenger seat side brackets 1, 3 integrated by a connecting member 4. Main and sub first links 10, 15 are pivoted on respective link arms 9, 14 via first pivots 9a, 14a. Main and sub second links 11, 16 pivoted on respective brackets 1, 3 via second pivots 11b, 16b are connected with the respective first links 10, 15 via third pivots 10a, 15a. The sub link arm 14 and the main second link 11 are pivotally connected to a sub link rod. A main link rod 6 from a wiper motor 2 is pivoted on the main second link 11. An upper reversing position is set near a position where the first, third and second pivots 9a, 10a, 11b of a main link mechanism ML are approximately on a straight line and a lower reversing position is set near a position where the first, third and second pivots 14, 15a, 16b of a sub link mechanism SL are approximately on a straight line.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a truck, a bus,
The present invention belongs to the technical field of a modular wiper device installed in a vehicle such as a passenger car.

[0002]

2. Description of the Related Art Generally, some wiper devices of this type include
The base end of a wiper arm equipped with a blade at the tip is integrally supported by a pivot shaft pivotally supported on the body side, and a link mechanism is interlockingly connected to the pivot shaft, and the wiper motor is driven to rotate in one direction to rotate the pivot shaft. There is a structure in which the wiper arm connected to the pivot shaft is reciprocally inverted and oscillated between the vertically inverted positions of the window surface to perform the wiping operation. In this case, it is required to secure the wiping area of the window surface as wide as possible based on the range of the reciprocating reversing swing of the wiper arm, and the range of the reciprocating reversing swing is set, that is, the forward / reverse rotation of the pivot shaft is set. As described above, the range setting considers the wiping area to be as large as possible, but also the shape of the window surface, the state of interference between the wiper arm and the blade at the tip of the wiper arm, and the state of interference between the wiper device fixed to the vehicle body. Etc. are set after further considering various conditions. on the other hand,
The wiper arm can be switched between high-speed and low-speed wiping swing to correspond to the amount of rainfall. In this way, the wiper arm wiping swing can rotate forward and backward of the pivot shaft directly connected to the base end. When the wiper arm swings at a high speed and the inertial force increases, the wind pressure changes, the friction coefficient with the window surface changes, etc. In addition, the wiper arm may be in an overrun state in which the wiper arm swings beyond the reversal position due to the above-mentioned change and large inertial force. Therefore, the swing range of the pivot shaft must be set in consideration of the overrun in advance, and there is a problem that the wiping range must be reduced. Therefore, JP-A-2000-85540 and JP-A-2001-804
As disclosed in Japanese Patent Laid-Open No. 64, the multi-joint link (link mechanism) is used to prevent the wiper arm from overrunning at the time of reversing, so that the wiping range of the wiper arm does not change depending on various conditions. I am trying.

[0003]

However, in any of the above-mentioned conventional structures, the link member constituting the link mechanism is connected to the intermediate portion of the wiper arm. For this reason, when the wiper device is provided in the vehicle, a link member that is connected to the wiper arm middle part is provided as a member that is provided in a state of penetrating the inside and outside of the vehicle body in addition to the pivot shaft. And there is a problem that it becomes complicated. Further, when the link member is provided inside and outside the vehicle body, the link member performs a link operation (swing), so that an extra space is required for this and the layout is restricted.

[0004]

The present invention has been made in view of the above circumstances in order to solve these problems, and a pair of wiper arm base end portions are fixed to the tip end portion, respectively. In a modular wiper device in which a pivot shaft is rotatably supported by a pair of brackets fixed to a vehicle body, and both brackets are connected by a connecting member, a link is formed at each base end of the pivot shaft. One end of each arm is integrally fixed, while one end of each first link is pivotally supported by the other end of each link arm via a first pivot, and the other end of each first link is supported. , Linking each link mechanism by connecting the other end of the second link whose one end is pivotally supported to each bracket via the second pivot through each third pivot, and the link of one link mechanism Ah The other end and the other end of the second link of the other link mechanism are pivotally connected by a first rod, while the other end of the one second link is pivotally supported by a second rod from a wiper motor, Each wiper arm is configured to oscillate reciprocally between the vertically inverted positions of the window surface as the wiper motor is driven, and the first, third, and second pivots of one of the link mechanisms are arranged near a straight line. One of the upper and lower inversion positions of each wiper arm is set, and the other inversion position of each wiper arm is set in the vicinity of the first, third, and second pivots of the other link mechanism on a substantially straight line. The wiper arm connected to the mechanism is configured so as to regulate overrun at each inversion position except the other inversion in the vertical direction. By doing so, the modular wiper device can be easily attached to the vehicle body, and the wiper arm can be prevented from overrunning to have a good layout. In this structure, one wiper arm of the present invention is on the passenger side and the other wiper arm is on the driver side, and the first, third, and second pivots of the passenger side link mechanism are substantially aligned. Set the lower reversal position of each wiper arm in the vicinity, and set the upper reversal position of each wiper arm in the vicinity where the first, third, and second pivots of the link mechanism on the driver's side are on a substantially straight line. The wiper arm may be configured so as to restrict overrun at each inversion position except the upper inversion position.

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION Next, a first embodiment of the present invention will be described with reference to the drawings. In the drawings, reference numeral 1 denotes a driver side bracket which is located on one side below the window surface and is fixed to a driver side portion, and a wiper motor 2 is integrally fixed to the driver side bracket 1. . On the other hand, in the lower center part of the window surface, the passenger seat side bracket 3 is attached to the passenger seat side part.
Is fixed, but these driver side and passenger side brackets 1 and 3 are in a state of being connected in advance by a connecting pipe material (corresponding to a connecting member of the present invention) 4. 3 is provided with a member device for forming a wiper device to form a so-called modular wiper device, and is set to be attached to the vehicle body in this state.

As described above, the driver side bracket 1 has a wiper motor 2 fixed to the front side (front panel side when the vehicle body is mounted) of the driver side bracket 1, and the motor shaft of the wiper motor 2 ( (Not shown) is decelerated and is set to output by a drive shaft 2a extending in a direction orthogonal to the motor shaft. The drive shaft 2a is provided in the driver side bracket 1. It is arranged in a state of penetrating the formed through hole 1a and projecting to the back surface (lower surface) side. The drive shaft 2a has a crank arm 5
The base end of the main link rod (corresponding to the second rod of the present invention) 6 is swingably connected to the tip of the crank arm 5 via a ball joint 6a. ing. Further, the driver's seat side bracket 1 is formed with a pivot shaft support cylinder portion 1b constituted by a cylinder hole penetrating in the front and back directions, and the pivot shaft support cylinder portion 1 is formed.
A main pivot shaft (driver-side pivot shaft) 7 is rotatably supported through b. And the main pivot shaft 7 is
Tip portion 7 protruding from the surface side of the pivot shaft support cylinder portion 1b
The main wiper arm (driver-side wiper arm) 8 for wiping the window surface on the driver's seat side is integrally attached to a.

On the other hand, one end portion of the main link arm 9 is integrally provided at the base end portion 7b protruding from the back surface side of the main pivot shaft 7, and the other end portion of the main link arm 9 is provided at the other end portion. , One end of the main first link 10 is pivotally supported via the first pivot 9a. The main first link 10 is formed by crushing both ends of a pipe material into a flat plate shape. Further, a flat plate-shaped main second link 11 having a substantially isosceles triangular shape is connected to the other end of the main first link 10, and the apex angle portion of the main second link 11 (corresponding to one end) Yes) 11a
Is pivotally supported by a second pivot 11b rotatably and penetratingly supported by a shaft support cylinder portion 1c formed on the driver side bracket 1. Here, the shaft support cylinder portion 1c penetrating and supporting the second pivot 11b is the pivot shaft support cylinder portion 1b.
Is formed in a cylindrical hole penetrating in the front-back direction, and the apex angle portion 11a of the main second link 11 is pivotally supported at the end portion projecting from the rear surface side of the shaft support cylindrical portion 1c of the second pivot 11b. There is. Then, one bottom corner portion 11 of the main second link 11
c, the other end of the main first link 10 is a third pivot 10a
The main link arm 9, the main first link 10, and the main second link 11 constitute a main link mechanism ML interlockingly connected to the main pivot shaft 7. The first and third pivots 9a and 10a that pivotally support the main first link 10 are respectively configured by ball joints. By arranging the main first link 10 in an inclined shape, the link operation of the main link mechanism ML is performed. Are set so that they are not damaged.

On the other hand, the passenger side bracket 3 is formed with a pivot shaft supporting cylinder portion 3a constituted by a cylinder hole penetrating in the front and back direction, and the pivot shaft supporting cylinder portion 3a is provided with a sub-pivot. A shaft (passenger seat side pivot shaft) 12 is rotatably supported through the shaft 12. The sub-pivot shaft 12 has a sub-wiper arm (passenger-side wiper arm) 13 integrally attached to a tip portion 12a projecting from the front surface side of the pivot shaft support cylinder 3a for wiping the passenger-side window surface. Is set to be able to. The sub-pivot shaft 1
One end portion of the sub link arm 14 is integrally provided on the base end portion 12b projecting from the back surface side of the second sub arm 2, and the other end portion of the sub link arm 14 is attached to the other end portion via the first pivot 14a. One end of the first link 15 is pivotally supported, and the pivotal support is provided on the back surface side of the sub link arm 14.
Similar to the main first link 10, the sub first link 15 is formed by crushing both ends of a pipe material into a flat plate shape. Further, the other end of the sub first link 15 is connected to a sub second link 16 in the shape of a substantially isosceles triangular flat plate, and the vertex of the sub second link 16 (corresponding to one end) 16a is pivotally supported by a second pivot 16b which is rotatably supported in a penetrating manner on a shaft support cylindrical portion 3b formed on the passenger side bracket 3. Here, the second pivot 1
The shaft support cylindrical portion 3b penetrating and supporting 6b is formed in a cylindrical hole penetrating in the front-back direction like the pivot shaft support cylindrical portion 3a, and protrudes from the rear surface side of the shaft support cylindrical portion 3b of the second pivot 16b. At the end, the apex angle portion 16 of the sub second link 16
a is pivotally supported. The other end of the sub-first link 15 is pivotally supported by the other bottom corner portion 16c of the sub-second link 16 via the third pivot 15a.
A sub link mechanism SL that is interlocked with the sub pivot shaft 12 is configured. The first and third pivots 14a, 15a that pivotally support the sub first link 15 are respectively configured by ball joints. By arranging the sub first link 15 in an inclined shape, the link operation of the sub link mechanism SL is performed. Are set so that they are not damaged.

The tip of the main link rod 6 interlockingly connected to the wiper motor 1 provided on the driver side bracket 1 has one bottom corner portion 16d of the sub second link 15 pivotally supported on the passenger side bracket 3. The ball joint 6b is pivotally supported on the front side of the other end of the auxiliary link arm 14 on the passenger seat side bracket 3 side, and the ball joint 14b is disposed so as to be displaced from the first pivot 14a. Secondary link rod (corresponding to the first rod of the present invention) 1
The proximal end of 7 is pivotally supported. Here, the sub link arm 1
The ball joint 14b provided at the other end of 4 may be provided coaxially with the first pivot 14a formed of a ball joint. On the other hand, the tip of the auxiliary link rod 17 is connected to the ball joint 17 at the other bottom corner portion 11d of the second link 11 on the driver side bracket 1 side.
It is pivoted using a. This allows the driver side,
The main and sub link mechanisms ML and SL, which are respectively arranged on the passenger seat side brackets 1 and 3, are interlocked and coupled, and the overall link mechanism L of the wiper device is configured in this manner. Then, as the wiper motor 2 is rotationally driven, the main and sub link rods 6 linearly reciprocate, and the main and sub link mechanisms ML and SL respectively perform link operation,
The main and sub link arms 9 and 14 are set to reciprocally reversely swing within a predetermined swing range, and accordingly, the main and sub link arms 9 and 14 fixed to one end of the main and sub link arms 9 and 14 respectively.
The main and sub wiper arms 8 and 13 connected to the sub-pivot shafts 7 and 12 are configured to reciprocally reversely swing. As the main and sub-pivot shafts 7 and 12 rotate forward and backward in this way, the main and sub-wiper blades 8a and 13a attached to the tips of the main and sub-wiper arms 8 and 13 move downward and above the window surface. It is set to perform the wiping operation between the reversal position. 1d and 3c are mounting seats for mounting the driver side bracket 1 and the passenger side bracket 1 and 3 to the vehicle body, respectively.

In this structure, the main and sub wiper blades 8a and 13a are located at the upper reversal position,
Although the main and sub link arms 9 and 14 also reach the vertically inverted positions, in the present embodiment, the main link mechanism ML provided on the driver side bracket 1 has a main link mechanism ML as shown by a solid line in FIG. When the sub link arms 9 and 14 reach the upper reversal position, the main first link 10 and the main second link 11, which swing the main link arm 9, bend from each other, and the link operation is performed to set the longest position. Relationship, that is, the first, third, and second pivots 9a, 10a, 11b
It is set so that and are located on a substantially straight line. On the other hand, in the sub link mechanism SL provided on the passenger side bracket 3, as shown by the solid line in FIG. 5, the sub link arm 14 is moved along with the arrival of the main and sub link arms 9 and 14 in the downward inversion position. The relationship in which the sub-first link 15 and the sub-second link 16 for rocking each other are in the longest posture by the link operation from the bending posture, that is, the first,
The third and second pivots 14a, 15a, 16b are set so as to be positioned on a substantially straight line.

Then, as described above, the sub link arm 14 of the passenger side bracket 3 receives the driving force of the wiper motor 2 via the main link rod 6 from the sub link mechanism S.
It swings based on the link operation of L, and reaches the lower reversal position due to the relationship that the first, third, and second pivots 14a, 15a, 16b are positioned on a substantially straight line, but at this time,
Even if the operation from the side of the main link rod 6 becomes an operation (direction of arrow X) that exceeds the lower reversal position, the sub first and sub second links 15 and 16 do not have a link length that exceeds the maximum length. Therefore, the sub link arm 14 does not swing beyond the lower inverted position. Therefore, the swinging of the sub link arm 14 in the direction of the arrow X is restricted, and the overrun is prevented at the lower reversal position of the sub pivot shaft 12 (wiper arm 13).

On the other hand, the main link mechanism MK of the driver's seat side bracket 1 is interlocked with the swing of the sub link arm 14 via the sub link rod 17, so that the sub link arm 14 swings. The motion is directly linked to the main link arm 9, and therefore the main link arm 9
Are set to prevent overrun at the lower reversal position. Further, the main link arm 9 has the first, third and second pivots 9a, 10a, 1 as described above.
It is set so as to reach the upper reversal position as a result that the position 1b is located on a substantially straight line. At this time, even if the operation from the side of the sub link rod 17 becomes an operation (direction of the arrow Y) that exceeds the upper inverted position, the main first and second main links 10 and 11 have a link length exceeding the longest. Therefore, the main link arm 9 does not swing beyond the upper reversal position. Therefore, the swing of the main link arm 9 in the arrow Y direction is regulated, and the overrun is prevented at the upper reversal position of the main pivot shaft 7 (wiper arm 8). The auxiliary link arm 14 of the passenger side bracket 3 is located at a position shown by a virtual tip in FIG. 5 in the downward reversal position, and receives an operation from the auxiliary link rod 17 side (first link 10 and There is a case where the main second link 11 exceeds the longest length and is bent to the opposite side) to be in an overrun state (a state in which the sub second link 16 moves in the arrow Y direction). As shown in, the blade 13a on the passenger seat side is located within the wiping range of the blade 8a on the driver seat side, the adverse effect of overrun is small, and the overrun regulation is not intentionally set at this position.

Incidentally, the first, third, and
The second pivots 9a, 10a, 11b, or the first, third, second pivots 14a, 15a, 16b of the sub-linkage SL, are slightly in front of each other so that their respective pivots are located in a straight line. It is set so as to reach the corresponding inversion position in each stage. By the way, if the relationship in which these relationships reach a straight line is set as the vertical inversion position as it is, the overrun corresponding thereto can be completely eliminated, and it is also possible to do so. However, swinging from the state of being located on such a straight line toward the reverse position on the opposite side, that is, the relationship between the sub first and second links 15 and 16, the main first and second links 10,
In the case where the link operation is performed so as to bend from the state where the relationship with 11 is located on a straight line, the main and sub link rods 6,
There is a fear that the bending direction will be the opposite direction due to the operation from the 17 side, and it is presumed that the smooth operation is impaired. For this reason, in the present embodiment, the link mechanism L can perform a reliable operation by setting the inversion position a little before the stage in which the relationship of being positioned on a substantially straight line in anticipation of a slight overrun. Therefore, it is considered that the reversing operation at each reversing position is smoothly performed.

In the embodiment of the present invention constructed as described above, the pivot shaft 7 is driven by the drive of the wiper motor 1 and the reciprocating reciprocating swing of the main and sub link arms 9 and 14.
The forward and backward rotation of 12 causes the main and auxiliary wiper arms 8 and 13 to reciprocally reverse and swing to wipe the window surface. In this case, the main and sub wiper arms 8 and 13 are connected to the wiper motor 1 in an interlocking manner with the main and sub link mechanisms ML and S.
The main and sub link arms 9 and 14 that form L are pivoted forward and backward based on the rocking motion. As described above, the main link arm 9 is prevented from overrun at both the upper reversal position and the lower reversal position.
In No. 4, overrun prevention is measured at the lower reversal position. As a result, at each reversal position, the main and sub link arms 9 and 14 do not swing beyond the reversal position, so that the main and sub pivot shafts 7 at each reversal position,
It is possible to prevent overrun of 12 (main and sub wiper arms 8 and 12). Therefore, when setting the wiping range of the window surface in advance, it is not necessary to consider measures against overrun of the main and sub wiper arms 8 and 12, and a large wiping area can be secured up to the vicinity of the pillar on the side of the window surface. The wiping area can be expanded.

In this structure, the main and sub link mechanisms ML and SL are connected to the main and sub pivot shafts 7 and 12, respectively, and are connected to the intermediate portion of the wiper arm like the conventional one. There are no linked members. Therefore, only the pivot shafts 7 and 12 are required as the members penetrating the inside and outside of the vehicle body, and the mounting work does not become particularly troublesome and complicated, and the installation space is small and free. Layout can be Moreover, since this is a modular type (integrated type) wiper device, it can be easily attached to the skeleton, the installation of the wiper device can be simplified, and the wiping range of the wiper device accompanying the installation can be reduced. Errors and the like can be reduced. Furthermore, the main and sub link mechanisms ML, S
L is separately provided on the driver side bracket 1 or the passenger side bracket 3, respectively, and these overrun the upper and lower inverted positions with respect to the main and sub pivot shafts 7 and 12 of both brackets 1 and 3. It is set to regulate. As a result, the member for overrun regulation is evenly provided without being biased to one of the brackets, resulting in good balance.

Further, in this structure, the main first link 10 and the main second link 11 are in the upper inverted position, and the sub first link 15 and the sub second link 16 are in the bent state in the lower inverted position. It is set so as to reach both the upper and lower reversal positions according to the swing change so as to be a linear state that is substantially the longest. Therefore, when the main and sub wiper arms 8 and 13 reach the vicinity of the respective reversal positions where overrun prevention is performed, the angular velocities of the corresponding pivot shafts 7 and 12 are slowed down. The swing speed of the sub wiper arms 8 and 13 is reduced. As a result, the main and sub wiper arms 8 and 13 can reduce the inertial force at each of the corresponding reversing positions to reduce the overrun itself, and also reduce the impact noise and vibration at the time of reversing, which is quiet. In addition, a high performance wiper device can be provided, and further, since deceleration is performed at the time of reversing, the reversing load is reduced, and rattling and wear are also improved.

Further, in this structure, since the overrun itself can be made small, the rigidity of the brackets provided on the driver's seat side and the passenger's seat side can be improved in the case of such a modular wiper device. It is possible to deal with a lower bracket than that of an ordinary bracket. Therefore, it is possible to reduce the size and weight of the bracket, and it is possible to reduce the cost.

The present invention is not limited to the above-mentioned embodiment, and the wiper motor can be arranged on either the driver seat side bracket or the passenger seat side bracket.

[Brief description of drawings]

FIG. 1 is a schematic front view showing a mounted state of a wiper device.

FIG. 2 is a rear view of the wiper device.

FIG. 3 is a front view of a wiper device.

FIG. 4 is a rear view of a driver side bracket portion.

FIG. 5 is a rear view of a bracket portion on the passenger seat side.

[Explanation of symbols]

1 Driver side bracket 1b Pivot shaft support cylinder 2 Wiper motor 3 Passenger side bracket 3a Pivot shaft support cylinder 4 Connected pipe material 6 Main link rod 7 Main pivot axis 8 Main wiper arm 9 Main link arm 9a first axis 10 Main first link 10a Third axis 11 Main second link 11b Second axis 12 Secondary pivot axis 13 Sub-wiper arm 14 Sub link arm 14a First axis 15 Deputy first link 15a Third axis 16 Sub-second link 16b Second axis 17 Secondary link rod ML main link mechanism L Whole link mechanism

Claims (2)

[Claims] 1. A pivot shaft having a pair of wiper arm base ends fixed to a tip end thereof is rotatably supported by a pair of brackets fixed to a vehicle body, and the two brackets are connected by a connecting member. In the modular wiper device, the one end of the link arm is integrally fixed to the base end of each pivot shaft, and the other end of each link arm is connected to one end of the first link via the first pivot. Each of the first links, and the other end of each of the first links is connected to the other end of each second link whose one end is pivotally supported by each bracket via the second pivot through the third pivot. By connecting each link mechanism, and the other end of the link arm of one link mechanism and the other end of the second link of the other link mechanism are pivotally connected by the first rod, while Two links to the other end The second rod from the ipa motor is pivotally supported, and each wiper arm is configured to swing reciprocally between the upside-down positions of the window surface as the wiper motor is driven. , The upper and lower reversal positions of each wiper arm are set in the vicinity of the second pivot on a substantially straight line, and the first, third, and
The other reversal position of each wiper arm is set in the vicinity of the second pivot on a substantially straight line, and the overrun at each reversal position of the wiper arm connected to the one link mechanism is controlled except for the other reversal position in the vertical direction. Modular wiper device configured to 2. The wiper arm according to claim 1, wherein one wiper arm is on the passenger seat side, and the other wiper arm is on the driver seat side, and the first, third, and second pivots of the link mechanism on the passenger seat side are substantially straight. The lower reversal position of each wiper arm is set near the line, and the upper reversal position of each wiper arm is set near the first, third and second pivots of the driver side link mechanism, A modular wiper device configured to restrict overrun at each inversion position except the upper inversion position of the wiper arm on the passenger side.