JPH03262762A - Wiper for vehicle - Google Patents

Abstract

PURPOSE:To reduce the cost by providing a rise-up mechanism lifting and storing a wiper arm with a simple structure having three links. CONSTITUTION:A lever 20 is arranged relatively rotatably around the pivot shaft 16 of a right wiper 10A, and the lever 20 is constituted of the first link 22 and a lever 24 which is extended at a preset angle with the link 22 and forms part of a rotating means at the time of storage. One end of a pivot lever 18 is fixed to the other end of the pivot shaft 16, and one end of the second link 26 is connected to the other end of the pivot lever 18 to be faced to the first link 22. One end of the third link 30 is connected to the tip of the link section 22 of the lever 20, and the other end is connected to one end (connection portion to the link 26) of a link rod 28 transferred with the power of a wiper motor 32 so that the link 30 is faced to the pivot lever 18.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a wiper for a vehicle, and particularly to a wiper for a vehicle that has a rise-up function that moves the wiper arm and blade further downward from the lower inversion position to stop and retract the wiper arm and blade. Regarding.

[Prior Art] Among vehicle wipers, when the wiper is stopped, the wiper arm and blade are moved further downward than the bottom inversion position and stopped in order to store the wiper arm and blade in the cowl box at the lower end of the windshield glass. A wiper equipped with a mechanism is known.

In this type of wiper, the wiper arm and blade are rotatably supported by a pivot shaft, and a pivot lever is fixed to the pivot shaft. Further, a link rod connected to a crank arm of the wiper motor is connected to the pivot lever, and the rotational force of the wiper motor is transmitted to the pivot lever by this link rod.

During normal operation of the wiper, the rotational force of the wiper motor is transmitted to the pivot lever via the link rod, thereby reciprocating the pivot shaft and reciprocating the wiper arm and blade. On the other hand, when the wiper is stopped and retracted, the rotation angle of the wiper motor crank arm can be changed by changing the effective pinch of the wiper motor crank arm using an eccentric pin, eccentric shaft, or bending/extending the crank arm, or by controlling the wiper motor itself. By changing, the pivot lever is moved to a predetermined angle change from the normal operation, and the wiper arm & blade is moved further down than the lower reversed position (so-called rise up).
It is supposed to stop and store.

[Problems to be Solved by the Invention] By the way, in a wiper equipped with such a conventional rise-up mechanism, mechanisms such as an eccentric pin and an eccentric shaft for raising the rise when the wiper is stopped and retracted are complicated, and the motor controller and rotation Special components such as angle detection sensors were essential. As a result, the overall cost is high, and a boat-type motor cannot be used as a wiper motor.

The present invention has been made in consideration of the above facts, and an object of the present invention is to provide a wiper for a vehicle that has a simple structure and low cost, and is capable of raising the wiper arm and blade and storing and stopping the wiper arm and blade.

[Means for Solving the Problems] A wiper for a vehicle according to the present invention includes a link rod connected to a wiper motor, and a pivot lever having one end fixed to a pivot shaft rotatably supporting a wiper arm and rotating the pivot shaft. A first wiper for a vehicle in which the wiper arm is rotated reciprocally by the wiper arm, the first end being coaxially and relatively rotatably connected to the pivot shaft.
and facing the first link in a substantially parallel state,
a second link having one end connected to the other end of the pivot lever and the other end connected to the link rod; and a second link facing the pivot lever in a substantially parallel state and having one end connected to the other end of the first link. a third link, the other end of which is connected to the connecting portion between the second link and the link rod;
a link that holds the first link in place during normal operation of the wiper, and a link that holds the first link in place when the wiper is stopped and retracted.
and a storage rotation means for rotating the link by a predetermined amount.

[Function] In the vehicle wiper having the above configuration, the first link and the second link face each other in a substantially parallel state, and the pivot lever and the third link face each other in a substantially parallel state.
The links face each other in a substantially parallel state, and constitute a parallel link mechanism as a whole.

During normal operation of the wiper, the first link is held stationary by the retracted rotation means.

Here, when the wiper motor operates, the rotational force of the wiper motor is transmitted to the pivot lever via the link rod and the second link, thereby reciprocating the pivot shaft and reciprocating the wiper arm.

In this case, since the first link is stationary, the second link and link rod are held by the third link, and the third link moves approximately parallel to the pivot lever, causing the rotational force of the link rod to move. is reliably transmitted to the pivot lever.

On the other hand, when the wiper is stopped and stored, the third link is rotated by a predetermined amount by the storing rotation means. Therefore, the third link connected to the first link and the third link connected to this third link are The second link is moved while being connected to the link rod.Therefore, the pivot lever is rotated through both links by an angle corresponding to the amount of rotation of the first link. The pivot shaft to which the wiper arm is fixed is rotated to move the wiper arm, and the wiper arm is moved further downward than the lower inversion position and is stopped and retracted (rise amplifier).

In this way, the KRs-like structure of the first to third links allows the wiper arm to rise up and be stopped when it is retracted, thereby reducing costs.

Further, the wiper motor does not need to be any special motor, and can be realized by using a normal motor.

[Example] FIG. 1 shows a schematic overall configuration diagram of a vehicle wiper 10 according to the present invention.

The wiper 10 is of a so-called parallel interlocking type, which basically includes a right wiper 10A and a left wiper IOB, which have the same structure. The left and right wipers each have wiper arms 12.
A, 12B, and blades 14A and 14B are provided, and the blades 14A and 14B are reciprocated by the reciprocating rotation of the arms 12A and 12B, respectively, to wipe away raindrops etc. attached to the windshield.

The wiper arm 12A of the right wiper IOA is connected to the pivot shaft 16
The wiper arm 12A and wiper blade 14A always rotate together with the pivot shaft 16.

As shown in FIGS. 2 and 3, one end of a pivot lever 18 is fixed to the other end of the pivot shaft 16. As shown in FIGS. Therefore, by swinging the pivot lever 18, the pivot shaft 16 can be rotated.

On the other hand, the wiper arm 12B of the left wiper IOB is fixed to one end of the pivot shaft 36 and is rotatably supported, so that the wiper arm 12B and the wiper blade 14B
always rotates together with the pivot shaft 16. Further, one end of a pivot lever 38 is fixed to the other end of the pivot shaft 36, and by swinging the pivot lever 38, the pivot shaft 36 can be rotated.

Right wiper IOA pivot lever 18 and left wiper IO
It is connected to the pivot lever 38 of B by a connecting rod 40. Therefore, the pivot lever 18 and the pivot lever 38, that is, the pivot shaft 16 and the pivot shaft 36 are always interlocked.

A lever 20 is disposed on the outer periphery of the pivot shaft 16 of the right wiper IOA, coaxially with the pivot shaft 16 and rotatable relative to the pivot shaft 16. The lever 20 includes a link portion 22 as a first link, and a lever portion 24 that extends at a predetermined angle (for example, 120 degrees) with the link portion 22 and constitutes a part of the rotating means when stored. has been done. That is, the link portion 22 and the lever portion 24 are both connected to the pivot lever 1.
It is possible to rotate relative to 8.

At the other end of the pivot lever 18 (the connection part with the connecting rod 40), one end of a link 26 as a second link is connected.
It is connected to the link portion 22 of the lever 20 in a state where it faces the link portion 22 . Furthermore, the other end of this link 26 is connected to the link rod 2
8. Further, one end of a link 30 as a third link is connected to the tip of the link portion 22 of the lever 20, and the other end of the link 30 is
The link 30 is connected to one end of the link rod 28 (the part connected to the link 26) in a state facing the pivot lever 18.

The other end of the link rod 28 is connected to a crank arm 34 of a wiper motor 32. Therefore, the rotational force of the wiper motor 32 is transmitted to the link 30 via the link rod 28.
．． 26 and the pivot lever 18.

Here, as shown in FIG. 2, the pivot lever 18,
Link portion 22, link 26 and link 30 of lever 20
have approximately the same length and are connected so as to form a parallelogram as a whole, forming a so-called parallel link mechanism.Furthermore, the link 26 and the link rod 28 are arranged in a straight line when the wiper motor 32 is stopped. The dimensions of each part are set in .

On the other hand, a rise-up lever 42 is connected to the tip of the lever portion 24 of the lever 20 as a means for rotating during storage. This rise up lever 42 is usually the lever part 2.
4 is held in a predetermined position to keep the lever 20 in an immovable state, and furthermore, by manual operation, the lever part 24
This allows the link portion 22 of the lever 20 to be rotated by a predetermined angle around the pivot shaft 16.

Next, the operation of this embodiment will be explained.

In the wiper 10 having the above configuration, as shown in FIGS. 2 and 4(A), when the wiper is stopped, the pivot lever 18,
Link 822, link 26 and link 30 of lever 20
are positioned so as to form a parallelogram as a whole, and the link 26 and the link rod 28 are positioned on a straight line.

Here, during normal wiper operation, the lever portion 24 of the lever 20 is held at a predetermined position by the rise up lever 42, and the lever 20 (link portion 22) is in an immovable state.

When the wiper motor 32 operates, this rotational force is transmitted via the link rod 28 to the link 26, and further via this link 26 to the pivot lever 18, which causes the pivot shaft 16 to reciprocate and rotate the wiper arm 12A. Rotates back and forth.

At the same time, the rotational force of the wiper motor 32 transmitted to the link 26 is further transmitted to the pivot lever 38 via the connecting rod 40, thereby causing the pivot N1f
1136 is rotated back and forth, and the wiper arm 12B is also rotated back and forth in synchronization with the wiper arm 12A.

In this case, the lever 20 is held by the rise up lever 42 and the link part 22 is immovable, so the link 26 and the link rod 28 are held by the link 30 while the fourth
As shown in Figure (B), the link 30 is connected to the pivot lever 18.
The rotational force of the link rod 28 is reliably transmitted to the pivot lever 18. Similarly, the pivot lever 38 also moves parallel to the pivot lever 18, and the rotational force is reliably transmitted to the pivot lever 38.

The movement of the pivot lever 18 and the pivot lever 38 progresses, and the wiper motor 32 moves 1/2 as shown in FIG. 4(C).
When the pivot lever 18, link 30, and pivot lever 38 are rotated twice, they are reversed and moved and returned to their original positions (state shown in FIG. 4(D)), and this is repeated thereafter, causing the pivot lever 18 and the pivot lever 38 to swing move,
The wiper arms 12A and 12B rotate back and forth.

Next, in order to store the left and right wipers (wiper arms 12A, 12B and wiper blades 14A, 14B) in a cowl box, etc. (not shown) at the lower end of the windshield glass, they are moved further below the lower inversion position and stopped. When retracting (so-called rise-up), the wiper motor 32
is stopped, and the rise up lever 42 is further operated.

When the rise-up lever 42 is pulled in the direction of the arrow in FIG. 2 by manual operation or the like by an occupant, this pulling force is transmitted to the lever portion 24 of the lever 20, as shown in FIGS. 3 and 5. Therefore, the lever portion 24 is swung, and the link portion 22 of the lever 20 is rotated by an angle θ around the pivot shaft 16.

At this point, the wiper motor 32 is stopped and the connection portion of the link rod 28 with the crank arm 34 is in an immovable state. Therefore, when the link portion 22 rotates around the pivot shaft 16, the link 32 connected to the link portion 22 The link 26 connected to this link 30 is moved while being connected to the link rod 28 and held relatively. Therefore, the pivot lever 18 is rotated by an angle Φ corresponding to the rotation angle θ of the link portion 22 via both links.

Therefore, the pivot shaft 16 to which the pivot lever 18 is fixed is rotated, and the wiper arm 12A is moved further downward than the lower reversal position, and stopped and retracted (so-called rise-up). At the same time, when the pivot lever 18 is rotated by an angle Φ, this pivot lever 18
The pivot lever 3 is connected to the pivot lever 3 via the connecting rod 40.
8 is similarly rotated, thereby rotating the pivot shaft 36, and the wiper arm 12B is also moved downward and raised up.

Here, the optimum rise-up angle of the wiper arm 12A and the wiper arm 12B during rise-up, that is,
The optimum rotation angle Φ of the pivot lever 18.38 corresponds to the rotation angle θ of the link portion 22 of the lever 20, and since the rotation angle θ of this link portion 22 is set by the rise-up lever 42, the rise-up Lever 42
The wiper arm 12A is adjusted by appropriately setting the operation amount (tension amount) of
.

What is necessary is to set the optimum rise-up angle of 12B.

In addition, when the amount of operation of the rise up lever 42 is constant, the pivot lever 18.38 at the time of rise up is
The pivot lever 18 and the lever 2 are rotated so that the optimum rotation angle Φ of
0 (lever part 24 and link 822>, the dimensions of each part of the link 26, link 30, and link rod 28 may be set.

In this way, wiper arm 12A during rise-up,
The amount of movement (rotation angle) of 12B can be set freely, increasing the degree of freedom in design and the range of application to many vehicle models.

As explained above, in the wiper 10, the wiper arm 12A and the wiper arm 12B can be raised and stopped by the simple structure of the lever 20 (the lever part 24 and the link part 22), the link 26, and the link 30.
Further, the wiper motor 32 does not need to be a special motor at all, and can be realized by using a normal motor, thereby reducing costs.

In this embodiment, the rise up lever 42 is used as a rotating means during storage, and the link portion 22 of the lever 20 is rotated by a predetermined angle around the pivot lees 16 by manual operation, but the present invention is not limited to this. The rise-up lever 42 may be connected to an operating source such as a motor, and the motor may be automatically operated to rotate the link portion 22 of the lever 20 by a predetermined angle during rise-up. In this case, operability is further improved.

Further, in this embodiment, a parallel interlocking type wiper IO constituted by a right wiper IOA and a left wiper IOB, which have basically the same structure, has been described, but the present invention is not limited to this, and the present invention is applicable only to either the left or right wiper. The present invention may be applied to a so-called one-arm wiper.

Furthermore, in this embodiment, wiper arms 12A, 1
Although the wiper 10 is shown in which the wiper 2B is fixed to one end of the pivot shaft 16.36 and constantly rotates together with the pivot shaft 16.36, the present invention is also applicable to wipers of other mechanisms. For example, a so-called gear train with a built-in planetary gear mechanism is placed between the wiper arm and the pivot shaft, and the gear train rotates itself and rotates the wiper arm in the opposite direction, thereby expanding the wiping range in an elliptical shape. The present invention can also be applied to a bending-and-extending wiper. When the present invention is applied to this type of bendable wiper, the rotation angle is amplified and transmitted by the planetary gear mechanism, so the amount of operation required to rotate the pivot shaft by a predetermined angle during rise-up is small. It is good and layer effective.

Furthermore, although this embodiment was used to store the wiper arm and blade, by using the same mechanism, the lower reversal position of this embodiment is further raised to the upper position, and the storage position is set to the lower reversal position, thereby switching between summer and winter. It can also be used as a wiper device.

That is, in order to prevent damage to the wiper device due to restrictions on the lower wiper reversal position due to snowfall in winter, it can also be used in a device in which the wiper lower reversal position can be switched to a raised position in winter compared to summer.

[Effects of the Invention] As explained above, the vehicle wiper according to the present invention has a simple structure and low cost, and has the effect of raising the wiper arm and blade to stop storage or switching between summer and winter wiping ranges. .

[Brief explanation of drawings]

FIG. 1 is an overall perspective view of a wiper for a vehicle showing an embodiment of the present invention, and FIG. 21! 1 and 3 are plan views showing the connection state of the pivot lever and each link, and FIGS. 4(A) to 4(D) show the operational relationship of the pivot lever and each link during normal operation of the wiper. 5 is a schematic operational diagram showing the operational relationship of the pivot lever and each link when the wiper rises up. 10... Wiper 10A... Right wiper, 10B... Left wiper, 12A, 1.2B... Wiper arm, 14A, 14B
... Wiper blade, 16 ... Pivot shaft, 18 ... Pivot lever 20 ... Lever, 22 ... Link part (first link), 24 ... Lever part (rotation means when stored) ), 26... Link (second link), 28... Link rod, 30... Link (third link), 32... Wiper motor, 36... Pivot shaft, 38... Pivot lever 42...Rise up lever (rotation means when stored)

Claims (1)

[Claims] (1) For vehicles in which a pivot lever, one end of which is fixed to a pivot shaft that rotatably supports a wiper arm and rotates the pivot shaft, is reciprocated by a link rod connected to a wiper motor, thereby reciprocating the wiper arm. A wiper, comprising: a first link having one end coaxially connected to the pivot shaft and relatively rotatable; facing the first link in a substantially parallel state, and having one end connected to the other end of the pivot lever; a second link facing the pivot lever in a substantially parallel state and having one end connected to the other end of the first link and the other end connected to the link rod; Second
a third link connected to a connecting portion between the link and the link rod; and a third link that holds the first link at a predetermined position during normal operation of the wiper, and holds the first link by a predetermined amount when the wiper is stopped and retracted. A wiper for a vehicle, comprising: a means for rotating the wiper when stored.