KR101866454B1

KR101866454B1 - Single arm wiper apparatus for vehicle provided with abnormal movement restraint structure of sub-arm ball joint

Info

Publication number: KR101866454B1
Application number: KR1020170055575A
Authority: KR
Inventors: 홍성진; 최정관
Original assignee: 디와이오토 주식회사
Priority date: 2017-04-28
Filing date: 2017-04-28
Publication date: 2018-06-12

Abstract

A single arm wiper apparatus for a vehicle provided with a reduction mechanism according to the present invention is a single wiper arm apparatus for wiping a glass of a vehicle with a single wiper blade, the single wiper arm apparatus comprising: a pivot shaft reciprocated in a predetermined angle range by a motor; An auxiliary shaft disposed parallel to the pivot shaft and installed not to rotate with respect to the vehicle and having a ball joint at an upper portion thereof; A main arm fitted to the pivot shaft and fixed to the pivot shaft by a fixing member in the form of a nut; A subarm that is rotatably pushed into the ball joint; And a wiper holder rotatably coupled to the subarm arm at one end and detachably coupled to the wiper blade at the other end and a wiper holder rotatably coupled to the main arm at an intermediate portion thereof, Wherein the main arm has a pressing projection projecting upward from the upper surface in the longitudinal direction of the auxiliary shaft, and the arm head of the main arm has the pressing projection projecting downward and downward in the longitudinal direction of the auxiliary shaft in a predetermined angular range from the bottom- A first pressing portion for pressing the first pressing portion; And a second pressing portion is provided in the main arm so that the main arm presses the pressing projection in the longitudinal direction of the auxiliary shaft in a predetermined angular range from the top reverse position, And a guide groove portion for receiving and guiding the upper portion of the pressing projection while reciprocally rotating between the upper and lower positions.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a single arm wiper apparatus for a vehicle,

The present invention relates to a single arm wiper apparatus for a vehicle, which is configured to wipe a windshield glass by a single wiper blade, and more particularly to a single arm wiper apparatus for a vehicle which comprises a main arm fixed by a nut to a pivot shaft, The present invention relates to a single-arm wiper device including a sub-arm rotatably coupled to an arm.

A windshield glass of a vehicle is disposed at the forefront of the vehicle interior space as a glass for securing the front view of the driver. Generally, a wiper apparatus for wiping the windshield glass surface is provided in order to secure the front view of the driver in the event of a rainstorm or to remove foreign substances accumulated in the windshield glass. The wiper device is characterized in that the washer fluid that is stored in a washer tank is applied to the windshield glass surface to reduce friction between the wiper and the windshield glass surface sliding on the windshield glass surface and to facilitate removal of foreign materials accumulated on the windshield glass surface And a wire nozzle capable of jetting.

Conventionally, a wiper arm having a wiper blade is fixed to a pair of wiper pivot shafts connected to each other by a single linkage by a single motor in order to wipe most vehicle windshield glass, .

Recently, however, the use of a wiper device having a structure capable of wiping windshield glass by a single wiper blade is increasing. The wire device configured to wipe the windshield glass by one wiper blade is called a so-called "single-arm wiper device ". An example of such a single-arm wiper device is disclosed in Korean Patent Laid-Open Publication No. 1998-049866.

Since the single wiper arm device has a simple structure, the manufacturing cost is low, and there is little fear of failure, so that the tendency of employing automobile manufacturers is increasing.

Various structures related to a single arm wiper device have been proposed. Among them, the present invention has a main arm fixed to a pivot axis which rotates by a motor and a linkage structure in a certain angular range, And a sub-arm structure rotatably coupled to a subsidiary axis arranged to be pivotally arranged with the main arm, wherein a wiper blade is rotatably coupled to the main arm and the sub- The present invention relates to a single arm wiper device having a wiper holder.

Typically, the sub-axis is disposed parallel to the pivot axis. The upper portion of the sub-shaft has a ball joint structure. The head of the main arm is fixed to the pivot shaft by a nut while being fitted to the pivot shaft. The head of the subarm is coupled to the ball joint structure in a forced press-fit state.

However, in the process of installing and operating the single arm wiper device having such a structure in the vehicle, the angle of the wiper blade is changed by the sub-arm in the vicinity of the position where the main arm rotates to the maximum. When this process is repeated, the coupling between the head of the sub-arm and the ball joint structure is weakened, and the sub-arm causes an unexpected flow to the upper side of the ball structure. The wiper blade is vibrated when the subarm moves upward in the coupling portion with the ball structure. There is a problem that an overrun occurs at the reversal position of the wiper due to chattering of the wiper blade, thereby deteriorating the scrubbing performance.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems, and it is an object of the present invention to provide a pneumatic radial tire having a main arm fixed to a pivot shaft and a sub- The present invention is to provide a single arm wiper device in which the vibration and overrun of the wiper blade is remarkably reduced by improving the structure such that the arm unexpectedly prevents the upward flow of the auxiliary shaft in the longitudinal direction.

In order to achieve the above object, a single arm wiper apparatus for a vehicle provided with a reduction mechanism according to an embodiment of the present invention is a single wiper arm apparatus for wiping glass of a vehicle by a single wiper blade,

A pivot shaft reciprocally rotated by a motor in a predetermined angular range;

An auxiliary shaft disposed parallel to the pivot shaft and installed not to rotate with respect to the vehicle and having a ball joint at an upper portion thereof;

A main arm fitted to the pivot shaft and fixed to the pivot shaft by a fixing member in the form of a nut;

A subarm that is rotatably pushed into the ball joint; And

And a wiper holder rotatably coupled to the sub arm at one end and detachably coupled to the wiper blade at the other end and rotatably coupled to the main arm at an intermediate portion,

And a pressing protrusion protruding upward from the upper surface of the arm head of the sub-arm in the longitudinal direction of the sub-shaft,

Wherein the arm head of the main arm is provided with a first pressing portion so that the main arm presses the pressing projection in the longitudinal direction of the sub shaft in a predetermined angular range from the bottom inverted position; And a second pressing portion for pressing the pressing projection in the longitudinal direction of the auxiliary shaft in a predetermined angular range from the upper reverse position of the main arm,

And the arm head of the main arm has a guide groove portion for receiving and guiding the upper portion of the pressing projection while the main arm reciprocally rotates between the lower inverted position and the upper inverted position.

And the first pressing portion and the second pressing portion are disposed on both sides in the longitudinal direction of the guide groove portion.

It is preferable that a ramp section is formed at both end portions of the guide groove portion so that the depth of the guide groove portion becomes deeper as the first pressing portion and the second pressing portion face each other.

Preferably, the arm head of the main arm has a release preventing flange formed to cover an upper portion of the arm head of the sub-arm to prevent the arm head of the sub-arm from being detached from the ball joint.

Preferably, the guide groove portion is formed on a bottom surface of the release preventing flange.

In the single arm wiper device for a vehicle provided with the reduction mechanism according to the present invention, since the pressing protrusion provided on the subarm moves along the guide groove portion provided in the main arm head, the subarm occurs in the upper side and the side direction of the ball joint The subordinate arm is prevented from flowing upward from the ball joint in the vicinity of the inversed position in which the flow is suppressed and the wiper blade angle is changed with respect to the main arm by the subarm and the wiper blade initial frictional force is large. The first pressing portion and the second pressing portion press the pressing projection provided on the subarm so as to reduce the wobble blade vibration during operation of the wiping function and reduce the inversion noise and the overrun of the wiper blade is remarkably reduced Lt; / RTI >

1 is a perspective view of a single arm wiper apparatus according to a preferred embodiment of the present invention.
Figure 2 is an exploded perspective view of the major components shown in Figure 1;
FIG. 3 is a view showing the arm head structure of the main arm and the sub-arm of the main arm shown in FIG. 1 in detail.
FIG. 4 is a diagram showing a reverse position and a reverse position when the single arm wiper device shown in FIG. 1 is installed in a vehicle.
FIG. 5 is a view showing an arrangement structure of the pressing protrusion and the guide groove when the single arm wiper device shown in FIG. 1 is in the downside reverse position.
FIG. 6 is a view showing the arrangement structure of the pressing projection and the guide groove when the main arm shown in FIG. 1 is rotated 23 degrees from the lower inverted position toward the upper inverted position.
FIG. 7 is a view showing an arrangement structure of the pressing protrusion and the guide groove when the single wiper arm wiper apparatus shown in FIG. 1 is in the upper reverse position. FIG.
8 is a view showing an arrangement structure of the pressing protrusion and the guide groove when the main arm shown in Fig. 1 is rotated 25.3 占 from the upper inverted position toward the lower inverted position.
FIG. 9 is a view showing a state in which the main arm and the subarm are assembled in the single arm wiper apparatus shown in FIG. 1. FIG.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 to 9, a single arm wiper apparatus 10 (hereinafter, referred to as a "single arm wiper apparatus") having a structure for reducing a clearance amount according to a preferred embodiment of the present invention includes a single wiper blade 100, To wipe the glass 200 of the vehicle.

The single wiper arm device 10 includes a pivot shaft 20, an auxiliary shaft 30, a main arm 40, a subarm 50, a wiper holder 60, a pressing projection 54, A release preventing flange 44, a guide groove 45, a first pressing portion 46, and a second pressing portion 47. [

The pivot shaft 20 can be reciprocally rotated in a predetermined angular range by a motor (not shown). The pivot shaft 20 may be directly coupled to the motor, or may be coupled via a link mechanism. In the present embodiment, the pivot shaft 20 is configured to reciprocally rotate in a section between 0 DEG and 108.3 DEG. A male threaded portion 22 is provided on the pivot shaft 20. The male threaded portion 22 is provided for fixing the main arm 40 to be described later to the pivot shaft 20.

The auxiliary shaft 30 is disposed parallel to the pivot shaft 20. The auxiliary shaft (30) is disposed at a position spaced apart from the pivot shaft (20). The auxiliary shaft 30 is installed so as not to rotate with respect to the vehicle. That is, the sub axis 30 is a fixed axis. A ball joint is provided on the upper portion of the auxiliary shaft 30. The upper end of the ball joint 32 is disposed at a lower position than the pivot shaft 20. [

The main arm (40) is fitted to the pivot shaft (20). The main arm (40) rotates integrally with the pivot shaft (20). The main arm (40) includes a main arm head (42) and a main retainer (48). The main arm head 42 is a portion to be engaged with the pivot shaft 20. The main arm head 42 may be made of a metal material such as aluminum, carbon steel, or the like. At one end of the main arm head 42, an assembly hole 43 is provided. The assembly hole (43) is fitted in the pivot shaft (20). And is fixed to the pivot shaft 20 by a fixing member 70 in the form of a nut in a state where the assembly hole 43 is fitted in the pivot shaft 20. [ The other end of the main arm head 42 is engaged with the main retainer 48. The main retainer 48 is joined to the main arm head 42 in an articulated manner. The main retainer 48 is elastically pressed toward the glass 200 of the vehicle with respect to the main arm head 42 by an elastic member such as a spring.

The subarm (50) is rotatably fitted in the ball joint (32). More specifically, the subarm (50) includes a subarm head (52) and a sub retainer (58).

The sub-arm head 52 is preferably made of a synthetic resin material. The sub-arm head 52 includes a ball housing 53 which can be forcedly inserted into the ball joint 32. The ball housing 53 is opened downward and has a space in which the ball joint 32 can be received. The ball housing 53 is rotatably mounted to the ball joint 32 by receiving the ball joint 32.

The sub-arm head (52) includes a pressing projection (54). The pressing projection 54 protrudes upward from the upper surface of the sub-arm head 52 in the longitudinal direction of the sub-shaft 30. The upper portion of the pressing projection 54 preferably has a smooth curved surface.

The sub retainer 58 is preferably made of a metal material. The sub retainer 58 is a bar-shaped member. One end of the sub retainer 58 is coupled to the sub-arm head 52 in a jointed manner. The sub retainer 58 is disposed substantially in parallel with the main retainer 48.

The wiper holder 60 is a component in which the wiper blade 100 is detachably mounted. The wiper holder 60 may be constructed of a "? &Quot; -shaped structure. One end of the wiper holder 60 is rotatably coupled to the sub-arm 50. More specifically, one end of the wiper holder (60) is rotatably coupled to the other end of the sub retainer (58). The wiper blade 100 is detachably coupled to the other end of the wiper holder 60. The intermediate portion of the wiper holder 60 is rotatably coupled to the main arm 40. More specifically, the middle portion of the wiper holder 60 is rotatably coupled to the other end of the main retainer 48. [ The wiper holder 60 is a link structure that allows the main arm 40 and the sub arms 50 to move in conjunction with each other.

The main arm head 42 is provided with a release preventing flange 44. The release preventing flange 44 extends from one side of the main arm head 42. The release prevention flange 44 is a canopy-type structure. The separation preventing flange 44 is formed so as to cover the upper portion of the sub-arm head 52 in a section in which the sub-arm head 52 rotates. The anti-departure flange 44 is provided to prevent the subarmham head 52 from unexpectedly leaving the ball joint 32.

A guide groove 45, a first pressing portion 46 and a second pressing portion 47 are provided on the lower surface of the release preventing flange 44. The guide groove portion 45 is a recessed groove portion which is opened downward toward the upper surface of the pressing projection portion 54. The guide groove 45 extends in a curved shape along the trajectory of the pressing projection 54 when the main arm 40 rotates. The guide groove 45 is a groove for receiving and guiding the upper portion of the pressing protrusion 54 while the main arm 40 reciprocally rotates between the lower inverting position LP and the upper inverting position UP. Since the upper portion of the pressing protrusion 54 is received and guided by the guide groove 45, the movement of the sub-arm 50 in the upward and downward directions during the rotation of the sub- do.

A first pressing portion 46 may be provided on one side in the longitudinal direction of the guide groove portion 45 and a second pressing portion 47 may be provided on the other side of the guide groove portion 45 in the longitudinal direction.

The first pressing portion 46 is formed on one side of the guide groove 45 in the longitudinal direction. The first pressing portion 46 may be a lower surface of the one side of the separation preventing flange 44 so as to press the pressing projection 54 downward in the longitudinal direction of the auxiliary shaft 30 have. The first pressing portion 46 is provided so that the main arm 40 presses the subarm head 52 in the longitudinal direction of the sub shaft 30 in a predetermined angular range from the bottom inverted position. In this embodiment, the first pressing portion 46 is located at a position between the sub-arm head 52 and the sub-arm head 52 in a section between the sub-inverted position LP and the sub- As shown in Fig.

The second pressing portion 47 is formed on the other side of the guide groove 45 in the longitudinal direction. The second pressing portion 47 may be a lower surface of the other side of the separation preventing flange 44 of the guide groove 45 so as to press the pressing projection 54 in the longitudinal direction of the auxiliary shaft 30. [ have. The second pressing portion 47 is provided so that the main arm 40 presses the sub arm head 52 in the longitudinal direction of the sub shaft 30 in a predetermined angular range from the upper inverted position. The second pressing portion 47 is positioned at a position between the position where the main arm 40 is at the position of 83 ° from the lower inverted position LP and the position of the upper inverted position UP, As shown in Fig.

It is preferable that a ramp section 49 is formed so that the depth of the guide groove 45 is gradually deepened in a direction in which the first pressing portion 46 and the second pressing portion 47 approach each other. The ramp section (49) is formed at both ends of the guide groove section (45). When the ramp section 49 is provided as described above, the distance between the sub-arm head 52 and the upper surface of the pressing projection 54 gradually increases or decreases according to the direction in which the main arm 40 rotates .

Hereinafter, the operation and effect of the single wiper arm device 10 including the above-described components will be described by the fact that the main arm 40 is rotated by the pivot shaft 20 between the lower reversing position LP and the upper reversing position UP Will be described in detail with reference to an example of a reciprocating rotational motion.

9, a process of assembling the main arm head 42 and the sub-arm head 52 to the pivot shaft 20 and the auxiliary shaft 30, respectively, will be described.

The ball housing 53 provided in the sub-arm head 52 approaches the upper portion of the ball joint 32. And the sub-arm head 52 is disposed so that the lower entrance of the ball housing 53 faces the upper portion of the ball joint 32. The assembling hole 43 provided in the main arm head 42 is inserted into the pivot shaft 20. The main arm 42 is positioned so that either the release preventing flange 44 of the main arm head 42, the first pressing portion 46 or the second pressing portion 47 is located on the upper portion of the pressing projection 54, The head 42 is positioned. The main arm head 42 is now pressed downward. As the main arm head 42 is pressed downward, the sub-arm head 52 is pressed. As a result, the ball housing 53 and the ball joint 32 are coupled to each other. The fixing member 70 is now screwed to the male threaded portion 22 of the pivot shaft 20 which has passed through the assembling hole 43. The main arm head 42 is fixed to the pivot shaft 20 by assembling the fixing member 70. [

Referring to FIG. 4, the main arm 40 starts rotating motion from the lower inverted position LP. The first pressing portion 46 is in a state in which the pressing projection 54 is pressed downward as shown in FIG. When power is applied to the motor, the motor rotates the pivot shaft 20. As the pivot shaft 20 rotates, the main arm head 42 rotates integrally with the pivot shaft 20. As the main arm head 42 rotates, the main retainer 48 rotates and the wiper holder 60 coupled to the main retainer 48 rotates. As the wiper holder 60 rotates, the wiper blade 100 coupled to the wiper holder 60 rotates to clean the surface of the glass 200 of the vehicle. When the main arm 40 is rotated from the lower inverted position LP to the position 23 degrees, the pressing projection 54 is separated from the first pressing portion 46 as shown in FIG. That is, when the main arm 40 is rotated from the lower inverted position LP to the position 23 degrees, the pressing projection 54 is released from the constraint of the first pressing portion 46. The pressing protrusion 54 moves along the guide groove 45 in this state. The pressing projection 54 is not pressed by the first pressing portion 46 and the second pressing portion 47 from the position where the main arm 40 continues to rotate to a position where the main arm 40 rotates from the bottom inverting position to 83 degrees. When the main arm 40 reaches the position where the main arm 40 is at 83 degrees from the lower inverted position LP, the second pressing portion 47 presses the pressing projection 54 as shown in Fig. Subsequently, as shown in FIG. 8, the main arm 40 is rotated to the above-mentioned inverted position UP and then reversed again to a position at 83 degrees from the above-mentioned inverted position LP as shown in FIG. The second pressing portion 47 keeps the pressing projection 54 in a pressed state. Accordingly, the sub-arm head 52 rotates in a state of being firmly engaged with the ball joint 32 in this section. Therefore, no flow occurs to the upper side of the ball joint 32 of the subarmham head 52. As a result, chattering of the wiper blade 100 coupled to the wiper holder 60 does not occur. Also, no overrun of the wiper blade 100 occurs. In the section between the position where the main arm 40 is at 83 degrees from the lower inverted position LP and the position at which the main arm 40 is 23 degrees from the lower inverted position LP, (46) and the second pressing portion (47). In this section, the frictional force between the wiper blade 100 and the surface of the glass 200 is not large, so that the wiper blade 100 does not vibrate. The first pressing portion 46 restrains the pressing projection 54 while the main arm 40 is moved from the position at 23 degrees from the lower inverted position LP to the lower inverted position LP The ball housing 53 is prevented from flowing upward from the ball joint 32. Since the operation of the wiper is performed by repeating this process, the wiper blade 100 does not vibrate or overrun in the vicinity of the upper reversing position UP or the lower reversing position LP. Also, as in the preferred embodiment of the present invention, when the ramp section 49 is provided, the first pressing portion 46 and the second pressing portion 47 constrain and release the pressing projection 54 The smooth restraint and disengagement is achieved at the site, which reduces the sense of heterogeneity when operating the wiper.

As described above, in the single arm wiper apparatus according to the present invention, since the pressing projection provided on the subarm moves along the guide groove portion provided in the main arm head, the flow generated in the upper and the side of the ball joint is suppressed A first pressing force is applied to the sub-arm so that the sub-arm is prevented from flowing upward from the ball joint in the vicinity of the inversed position in which the angle of the wiper blade varies with respect to the main arm by the subarm and in the vicinity of the bottom- And the second pressing portion presses the pressing projection provided on the subarm so as to reduce the vibration of the wiper blade during the wiping function operation, reduce the inversion noise, and significantly reduce the overrun of the wiper blade do.

While the present invention has been described with reference to the preferred embodiments, it is to be understood that the invention is not to be limited by the example, and various changes and modifications may be made without departing from the spirit and scope of the invention.

10: Single arm wiper device
20: Pivot axis
22: Male threads
30: Auxiliary axis
32: Ball joint
40: main arm
42: Main arm head
43: Assembly
44: Release prevention flange
45: Guide groove
46: first pressing portion
47: second pressing portion
48: Main retainer
49: Lamp section
50: Subarm
52: Sub-arm head
54:
58: Sub retainer
60: Wiper holder
70: Fixing member
100: Wiper blade
200: Glass of vehicle
LP: Lower reverse position
UP: Upside-down position

Claims

A single wiper arm device for wiping glass of a vehicle by a single wiper blade,
A pivot shaft reciprocally rotated by a motor in a predetermined angular range;
An auxiliary shaft disposed parallel to the pivot shaft and installed not to rotate with respect to the vehicle and having a ball joint at an upper portion thereof;
A main arm fitted to the pivot shaft and fixed to the pivot shaft by a fixing member in the form of a nut;
A subarm that is rotatably pushed into the ball joint; And
And a wiper holder rotatably coupled to the sub arm at one end and detachably coupled to the wiper blade at the other end and rotatably coupled to the main arm at an intermediate portion,
And a pressing protrusion protruding upward from the upper surface of the arm head of the sub-arm in the longitudinal direction of the sub-shaft,
Wherein the arm head of the main arm is provided with a first pressing portion so that the main arm presses the pressing projection in the longitudinal direction of the sub shaft in a predetermined angular range from the bottom inverted position; And a second pressing portion for pressing the pressing projection in the longitudinal direction of the auxiliary shaft in a predetermined angular range from the upper reverse position of the main arm,
Wherein the arm head of the main arm has a guide groove portion for receiving and guiding the upper portion of the pressing projection while the main arm reciprocally rotates between the lower reverse position and the upper reverse position. A single arm wiper device for a vehicle.

The method according to claim 1,
Wherein the first pressing portion and the second pressing portion are disposed on both sides in the longitudinal direction of the guide groove portion.

3. The method of claim 2,
Wherein a ramp section is formed at both end portions of the guide groove portion such that a depth of the guide groove portion is gradually deeper toward a direction in which the first pressing portion and the second pressing portion face each other, A single arm wiper device for a vehicle.

The method according to claim 1,
And the arm head of the main arm has a release preventing flange formed to cover an upper portion of the arm head of the sub-arm so as to prevent the arm head of the sub-arm from being separated from the ball joint. A single arm wiper device for a vehicle.

5. The method of claim 4,
Wherein the guide groove portion is formed on a bottom surface of the release preventing flange.