JP4009645B2 - Wiper unit - Google Patents

Description

The present invention relates to a wiper device for wiping a wiping surface with a wiper, which is integrally provided with a wiper motor, a wiper arm, a pivot shaft, a pivot arm, and a link connecting rod.

As a wiper unit that is integrally provided with a wiper motor, a wiper arm, a pivot shaft, a pivot arm, and a link connecting rod, one disclosed in JP-A-9-39742 is known.
Japanese Patent Laid-Open No. 9-39742

In the wiper unit described above, a bracket formed independently of the wiper motor is fixed to the wiper motor, and a pipe-shaped wiper frame is fixed to the bracket. Therefore, the coupling portion between the wiper motor and the bracket and the bracket and the wiper are fixed. There is a possibility that loosening may occur at each of the joint parts of the frame, and if the joint part is loosened, it causes mechanical vibration, which causes a problem of quality deterioration, and it is a problem to solve this problem. It was.

The wiper unit according to the present invention is intended to provide a wiper unit that can be coupled to a gear case that is directly coupled to a wiper motor with a screw and that can be firmly coupled without loosening. It consists of the structure and means.

In the wiper unit according to claim 1 of the present invention, a wiper motor, a motor arm fixed to the output shaft of the wiper motor, a wiper frame formed in a pipe shape, and a pivot shaft coupled to an end of the wiper frame A support portion; a pivot shaft rotatably supported by the pivot shaft support portion; a pivot arm coupled to the pivot shaft; and a link connecting rod connected to the motor arm and the pivot arm, respectively. a wiper unit, the wiper frame, together with the round hole portion which penetrates the screw through hole and a lower passing through the upper portion are formed, the screw retaining portion formed in the cylindrical surrounding the screw insertion hole Is provided integrally with the gear case fixing part, and the gear case of the wiper motor has With threaded hole is formed, a wiper frame support portion capable of supporting the gear case fixing portion of the wiper frame is formed, it is inserted into the screw insertion hole of the gear case fixing portion provided in the wiper frame, the screw retaining And a screw for coupling the wiper frame and the gear case by being inserted into the round hole portion of the case fixing portion and screwed into the screw hole of the wiper frame support portion provided in the gear case. It is characterized by that.

In a wiper unit according to a second aspect of the present invention, a wiper motor, a motor arm fixed to the output shaft of the wiper motor, a wiper frame having a pipe-shaped frame body, and an end of the wiper frame are coupled. Pivot shaft support, a pivot shaft rotatably supported by the pivot shaft support, a pivot arm coupled to the pivot shaft, and a link connecting rod connected to the motor arm and the pivot arm, respectively. a wiper unit comprising the door, the frame body of the wiper frame, together with the round hole portion which penetrates the screw through hole and a lower passing through the upper portion are formed, the cylindrical surrounding the screw insertion hole A gear case fixing portion formed integrally with the screw holding portion formed in The gear case of the wiper motor is formed with a screw-in hole and a wiper frame support portion capable of supporting the gear case fixing portion of the wiper frame. The screw of the gear case fixing portion provided in the frame body of the wiper frame is inserted into the insertion hole, it is supported on the screw retaining portion, and a wiper frame by being inserted into the round hole of the Kiyakesu fixing part is threaded into the threaded hole of the wiper frame support unit provided in the gear case It is characterized by having a screw for coupling with the gear case.

According to a third aspect of the present invention, there is provided a wiper unit having a wiper motor, a motor arm fixed to the output shaft of the wiper motor, and a frame body formed in a pipe shape, and a vehicle body coupled to an end of the frame body. A wiper frame having a side fixing portion and a pivot shaft support portion; a pivot shaft rotatably supported by the pivot shaft support portion of the wiper frame; a pivot arm coupled to the pivot shaft; and the motor arm; The wiper unit includes link connecting rods connected to the pivot arms, respectively, and the frame body of the wiper frame is formed with a screw insertion hole penetrating the upper part and a round hole part penetrating the lower part , respectively . A cylindrical screw holder that surrounds the screw insertion hole is integrated. A formed gear case fixing portion is provided, and a screw hole is formed in the gear case of the wiper motor, and a wiper frame supporting portion capable of supporting the gear case fixing portion of the wiper frame is formed. It is inserted through the screw insertion hole of the gear case fixing portion which is being supported by the screw retaining portion, and is inserted into the round hole of the Kiyakesu fixing portion threadedly hole of the wiper frame support unit provided in the gear case It is characterized by having a screw for connecting the wiper frame and the gear case by being screwed.

According to a wiper unit according to claim 1 of the present invention, the wiper frame, together with the round hole portion which penetrates the screw through hole and a lower passing through the upper portion are formed, surrounding the screw insertion hole cylindrical A gear case fixing portion integrally formed with a screw holding portion formed on the wiper motor is provided, and a screw case is formed in the gear case of the wiper motor, and the wiper frame supporting portion capable of supporting the gear case fixing portion of the wiper frame. And is inserted into the screw insertion hole of the gear case fixing part provided in the wiper frame, supported by the screw holding part, and inserted into the round hole part of the carrier case fixing part . A screw for coupling the wiper frame and the gear case by being screwed into the screw hole of the wiper frame support portion is provided.
Therefore, a reaction force is generated in the gear case fixing portion of the wiper frame against a stress that increases the outer diameter of the gear case fixing portion of the wiper frame in the middle and left and right directions, and the reaction force is applied to the wiper frame fixing screw. Since it acts as a thrust of the wiper frame fixing screw by acting toward, the wiper frame fixing screw screwed into the screw hole of the gear case does not loosen, and the wiper frame cover, wiper frame, and gear case Tightly coupled.
Therefore, there is an excellent effect that the wiper frame can be directly coupled to the wiper motor and can be firmly coupled without loosening.

According to a wiper unit of a second aspect of the present invention, in the configuration according to the first aspect of the present invention, the wiper frame further includes a frame body formed in a pipe shape. Therefore, the frame main body is formed in a pipe shape, and this frame main body is formed by being bent in accordance with the shape of the dash upper panel of the vehicle body to be mounted, and a gear case fixing portion is formed substantially at the center of the frame main body. .
Therefore, in addition to the effect of the wiper unit according to the first aspect of the present invention, there is an excellent effect that the wiper frame can be directly coupled to the wiper motor and can be firmly coupled without being loosened.

According to a wiper unit of a third aspect of the present invention, in the configuration according to the first aspect of the present invention, the wiper frame further includes a frame main body formed in a pipe shape, and an end portion of the frame main body. And a pivot shaft support portion as well as a vehicle body side fixing portion.
Therefore, one of the vehicle body side fixing portions is fixed by crimping to one end side of the frame main body, and the other vehicle body side fixing portion is fixed by crimping to the other end side of the frame main body. A pivot shaft support portion is formed on one of the vehicle body side fixed portions, and the pivot shaft is rotatably supported by the pivot shaft support portion.
Therefore, in addition to the effect of the wiper unit according to the first aspect of the present invention, there is an excellent effect that the wiper frame can be directly coupled to the wiper motor and can be firmly coupled without being loosened.

Embodiments of the wiper unit according to the present invention will be described below in detail with reference to the accompanying drawings.
1 to 4 show an embodiment of a wiper unit according to the present invention.

The wiper unit 1 shown mainly includes a wiper motor 2, a motor arm 3, a wiper frame 4, a wiper frame cover 5, a wiper frame fixing screw 6, a first link connecting rod 7, a first pivot arm 8, and a first pivot. The shaft 9 is composed of a second link connecting rod 10, a second pivot arm 11, and a second pivot shaft 12.

In the wiper motor 2, an armature 14 is rotatably accommodated in a motor yoke 13, and the motor yoke 13 is coupled by screwing screws 16 into a gear case 15. The armature 14 is provided with an armature shaft 17. As shown in FIG. 3, the armature shaft 17 is disposed so as to protrude into a gear housing portion 15 b formed in the gear case body 15 a of the gear case 15. Yes.

The armature shaft 17 is formed with a worm 17a in the gear housing portion 15b, and the first intermediate gear 18 and the second intermediate gear 19 are engaged with the worm 17a. The first and second intermediate gears 18 and 19 are two-stage gears, and the large diameter side is meshed with the worm 17a of the armature shaft 17 and the small diameter side is meshed with the output gear 20, respectively.

The output gear 20 is coupled to one end of an output shaft 21 that is rotatably supported by the gear case 15. The output shaft 21 is fixed to the base end portion of the motor arm 3 with the other end protruding outside the gear case 15. A first ball pin 22 is fixed to the tip of the motor arm 3. A first ball retainer 23 is coupled to the first ball pin 22 via a spherical pair. The first ball retainer 23 is fixed to one end of the first link connecting rod 7.

The gear case 15 is formed with a first vehicle body side fixing portion 15c and a wiper frame support portion 15d. The first vehicle body side fixing portion 15c protrudes from the gear case main body 15a in a plate shape. The wiper frame support portion 15d is formed to protrude from the gear case main body 15a into a substantially rectangular shape.

The wiper frame support portion 15d has a semicircular groove formed on one side of the support portion main body 15d1 in a semicircular groove shape having an inner diameter slightly larger than an outer diameter of a gear case fixing portion 4d formed on the wiper frame 4 described later. One wiper frame pressing surface 15d2 is formed.
Further, the wiper frame support portion 15d has first and second screw holes arranged side by side along the groove direction of the first wiper frame crimping surface 15d2 at the substantially center of the first wiper frame crimping surface 15d2. 15d3 and 15d4 are respectively formed. At this time, female screws are formed in the first and second screw holes 15d3 and 15d4. By using a wiper frame fixing screw 6 to be described later as a member such as a tapping screw, the female screw penetrates without forming a female screw. It may be just a simple hole.

In the wiper frame support portion 15d, the gear case fixing portion 4d of the wiper frame 4 is disposed on the first wiper frame crimping surface 15d2, and the wiper frame fixing screws 6 and 6 penetrating through the gear case fixing portion 4d are the first and first The first wiper frame crimping surface 15d2 is crimped to the gear case fixing portion 4d of the wiper frame 4 by being screwed into the second screw holes 15d3 and 15d4. The first wiper frame crimping surface 15d2 covers substantially the lower half of the entire circumference of the gear case fixing portion 4d along the cylindrical direction of the gear case fixing portion 4d of the wiper frame 4.

When the armature 14 is energized through the external connection wiring (not shown), the wiper motor 2 rotates the armature shaft 17, so that the first and second intermediate gears 18, 19 rotate via the worm 17 a, and the first, first As the output gear 20 rotates through the two intermediate gears 18 and 19 and the output shaft 21 rotates, the motor arm 3 rotates. Since the first ball pin 22 moves circularly as the motor arm 3 rotates, the first ball retainer 23 provides power for reciprocatingly swinging the first link connecting rod 7.

On the other hand, the wiper frame 4 is formed of a frame body 4a, a second vehicle body side fixing portion 4b, and a third vehicle body side fixing portion 4c.

The frame body 4a is formed in a pipe shape, and the frame body 4a is formed by being bent in accordance with the shape of the dash upper panel of the vehicle body to be mounted.
A gear case fixing portion 4d is formed at substantially the center of the frame body 4a.

As shown in FIG. 4, the gear case fixing portion 4d is provided with a cylindrical fixing portion main body 4d1, and a first screw insertion hole 4d2 and a second screw insertion hole are formed above the fixing portion main body 4d1. 4d3 is formed. The first and second screw insertion holes 4d2, 4d3 are arranged side by side in the cylindrical direction of the fixed portion main body 4d1 so as to penetrate the fixed portion main body 4d1.

In the first and second screw insertion holes 4d2, 4d3, first and second screw holders that are cylindrically formed at the inner peripheral portion on one side through which the wiper frame fixing screws 6, 6 are inserted first. Portions 4d4 and 4d5 are formed, respectively, and the first and second round hole portions 4d6 and 4d7 are respectively formed on the other side where the wiper frame fixing screws 6 and 6 are inserted into the lower portion of the fixing portion main body 4d1. It is formed through .

The first and second screw insertion holes 4d2, 4d3 are arranged so as to coincide with the screw-in holes 15d3, 15d4 formed in the wiper frame support portion 15d of the gear case 15, respectively. In forming the first and second screw insertion holes 4d2, 4d3, it is preferable to use the hole forming method disclosed in Japanese Patent Laid-Open No. 7-195283.

The gear case fixing portion 4d is disposed in a wiper frame support portion 15d formed on the gear case 15 of the wiper motor 2 described above, and a wiper frame cover 5 is disposed above the gear case fixing portion 4d.

As shown in FIG. 4, the wiper frame cover 5 has an inner diameter slightly larger than the outer diameter of the gear case fixing portion 4d formed on the wiper frame 4 inside the frame cover body 5a having a substantially semicylindrical shape. A second wiper frame pressure-bonding surface 5a1 having a size is formed. The second wiper frame crimping surface 5a1 is arranged in a substantially circular shape by the first wiper frame crimping surface 15d2 formed on the wiper frame support portion 15d of the gear case 15.

The frame cover main body 5a has first and second screw insertion holes 5a2, arranged approximately in the center of the second wiper frame crimping surface 5a1, and arranged side by side along the cylinder direction of the second wiper frame crimping surface 5a1. 5a3 is formed respectively. The first and second screw insertion holes 5a2, 5a3 are arranged so as to correspond to the first and second screw insertion holes 4d2, 4d3 formed in the gear case fixing portion 4d of the wiper frame 4, respectively, and the frame cover body At the center of 5a, it is formed on a contact protrusion 5a6 that is bent and protrudes upward in FIG. The abutting protrusion 5a6 is formed in a flat surface, and a wiper frame fixing screw 6 (described later) is screwed into contact with the head 6a of the wiper frame fixing screw 6 to thereby fix the gear case fixing portion of the wiper frame 4. 4d is elastically supported with respect to the wiper frame support portion 15d of the gear case 15.

And the 1st, 2nd gear case side edge part 5a4, 5a5 is each formed in the edge part of the circumferential direction of the 2nd wiper frame crimping | compression surface 5a1 of the frame cover main body 5a. The first and second gear case side end portions 5a4 and 5a5 have the second wiper frame crimping surface 5a1 crimped on the upper side of the gear case fixing portion 4d of the wiper frame 4 housed in the wiper frame support portion 15d of the gear case 15. At this time, the gear case 15 is disposed away from the wiper frame support portion 15d.

The wiper frame fixing screws 6 and 6 are inserted into the first and second screw insertion holes 5a2 and 5a3 of the wiper frame cover 5. The wiper frame cover 5 is disposed on the upper side of the gear case fixing portion 4d of the wiper frame 4 housed in the wiper frame support portion 15d of the gear case 15, and the wiper frame fixing screws are inserted from the first and second screw insertion holes 5a2, 5a3. Reference numerals 6 and 6 denote first and second screw holding portions 4d4 and 4d5, first and second round holes of the first and second screw insertion holes 4d2 and 4d3 formed in the gear case fixing portion 4d of the wiper frame 4, respectively. After passing through the portions 4d6 and 4d7, the wiper frame fixing screws 6 and 6 are screwed into the first and second screw holes 15d3 and 15d4 of the wiper frame support portion 15d of the gear case 15, respectively. The wiper frame crimping surface 5 a 1 is crimped to the upper side of the gear case fixing portion 4 d of the wiper frame 4. The second wiper frame crimping surface 5a1 covers substantially the upper half of the entire circumference of the gear case fixing part 4d along the gear case fixing part 4d of the wiper frame 4.

The wiper frame fixing screws 6, 6 are screwed into the first and second screw holes 15 d 3, 15 d 4 of the gear case 15 through the wiper frame cover 5 and the wiper frame 4, whereby the wiper frame cover 5 has a second wiper frame pressure contact surface. Since 5a1 is crimped to the upper side of the gear case fixing portion 4d of the wiper frame 4, and the first wiper frame crimping surface 15d2 of the gear case 15 is crimped to the lower side of the gear case fixing portion 4d of the wiper frame 4, the gear case of the wiper frame 4 A crushing load is applied to the fixing portion 4d from the first and second screw holding portions 4d4 and 4d5 toward the first and second round hole portions 4d6 and 4d7, and the outer diameter of the gear case fixing portion 4d of the wiper frame 4 is applied. A stress is applied to increase the value in the left and right directions in FIG.

At that time, the first and second gear case side end portions 5a4 and 5a5 of the wiper frame cover 5 are arranged away from the wiper frame support portion 15d of the gear case 15, while the wiper frame 4 has a gear case fixing portion 4d on the lower side. The first wiper frame crimping surface 15d2 that is crimped covers the lower half of the gear case fixing portion 4d, and the second wiper frame crimping surface 5a1 that is crimped to the upper side of the gear case fixing portion 4d of the wiper frame 4 is the gear case. Since the upper half of the fixing portion 4d is covered, the outer diameter of the gear case fixing portion 4d of the wiper frame 4 is increased by the wiper frame cover 5 and the wiper frame support portion 15d of the gear case 15 to the gear case fixing portion 4d of the wiper frame 4. In FIG. 4, a reaction force against the stress to be increased in the left and right direction is generated, and the reaction force is wiped off. Since the thrust of the wiper frame fixing screws 6 and 6 acts by acting toward the heads 6a and 6a of the screw fixing screws 6 and 6, the first and second screw holes 15d3 and 15d4 of the gear case 15 The screwed wiper frame fixing screws 6 and 6 are not loosened, and the wiper frame cover 5, the wiper frame 4 and the gear case 15 are firmly connected.

The second vehicle body side fixing portion 4b is crimped and fixed to one end side of the frame body 4a, and the third vehicle body side fixing portion 4c is crimped and fixed to the other end side of the frame body 4a.

A first pivot shaft support portion 4b1 is formed in the second vehicle body side fixing portion 4b, and the first pivot shaft 9 is rotatably supported by the first pivot shaft support portion 4b1. A first end of the wiper arm (not shown) is fixed to the first pivot shaft 9 so that one side of the second vehicle body side fixing portion 4b, which is the rear side in FIG. 1, protrudes outside the cowl top panel of the vehicle body. Is done.
A wiper blade on one side (not shown) is attached to the tip of the wiper arm on one side. A first pivot arm 8 is fixed to the first pivot shaft 9 on the other side of the second vehicle body side fixing portion 4b which is the front side in FIG.

The first pivot arm 8 has a first pivot shaft fixing portion 8a formed on the proximal end side and a link connecting rod connecting portion 8b formed on the distal end side. A second ball pin 24 is fixed to the front side in FIG. 1 of the link connecting rod connecting portion 8b of the first pivot arm 8, and the link connecting rod connecting portion 8b of the first pivot arm 8 in FIG. A third ball pin 25 is fixed on the rear side.

A second ball retainer 26 is coupled to the second ball pin 24 via a spherical pair. The second ball retainer 26 is fixed to the other end of the first link connecting rod 7. A third ball retainer 27 is coupled to the third ball pin 25 via a spherical pair. The third ball retainer 27 is fixed to the other end of the second link connecting rod 10.

A second pivot shaft support portion 4c1 is formed in the third vehicle body side fixing portion 4c, and the second pivot shaft 12 is rotatably supported by the second pivot shaft support portion 4c1. On the second pivot shaft 12, one side of the third vehicle body side fixing portion 4 c, which is the rear side in FIG. 1, protrudes to the outside of the cowl top panel of the vehicle body, and the base end portion of the wiper arm on the other side (not shown) is fixed. Is done.
A wiper blade on the other side (not shown) is attached to the tip of the wiper arm on the other side. A second pivot arm 11 is fixed to the second pivot shaft 12 on the other side of the third vehicle body side fixing portion 4c on the front side in FIG.

The second pivot arm 11 has a second pivot shaft fixing portion 11a formed on the proximal end side and a link connecting rod connecting portion 11b formed on the distal end side. A fourth ball pin 28 is fixed to the rear side of the link connecting rod connecting portion 11b of the second pivot arm 11 in FIG.

A fourth ball retainer 29 is coupled to the fourth ball pin 28 via a spherical pair. The fourth ball retainer 29 is fixed to the other end of the second link connecting rod 10.

The wiper unit 1 having such a structure is mounted on the vehicle body by screwing the first, second, and third vehicle body side fixing portions 15c, 4b, and 4c to the dash upper panel of the vehicle body, One side of each of the second pivot shafts 9 and 12 is disposed outside the cowl top panel of the vehicle body, and a wiper arm and a wiper blade are attached thereto.

When the armature 14 of the wiper motor 2 is energized through the external connection wiring, the armature shaft 17 rotates to rotate the motor arm 3 and the first ball pin 22 starts circular motion. Then, the circular motion of the first ball pin 22 is converted into the reciprocating motion of the first link connecting rod 7, the first pivot arm 8 reciprocates and the first pivot shaft 9 reciprocates. At the same time, the reciprocating motion of the first pivot arm 8 is transmitted to the second pivot arm 11 through the second link connecting rod 10, and the second pivot arm 11 is reciprocally rotated to cause the second pivot shaft 12 to move. Reciprocates. As the first and second pivot shafts 9 and 12 reciprocate, the respective wiper arms swing back and forth, and the wiping surfaces are wiped by the respective wiper blades.

As described above, when the wiper frame fixing screws 6, 6 are screwed into the first and second screw holes 15 d 3, 15 d 4 of the gear case 15 through the wiper frame cover 5 and the wiper frame 4, the gear case of the wiper frame 4. Although a crushing load is applied from the upper side to the lower side of the gear case fixing part 4d in the hole direction of the first and second screw insertion holes 4d2, 4d3 with respect to the fixing part 4d, the wiper frame support parts of the wiper frame cover 5 and the gear case 15 are applied. 15d generates a reaction force against the crushing load in the gear case fixing portion 4d of the wiper frame 4 and the reaction force becomes a thrust of the wiper frame fixing screws 6 and 6, so that the first and second of the gear case 15 The wiper frame 4 can be moved without loosening the wiper frame fixing screws 6 and 6 screwed into the screw holes 15d3 and 15d4. It becomes to be strongly bonded to Yakesu 15.

FIG. 5 shows a wiper unit according to a first embodiment of the present invention, and shows only a connecting portion between the wiper frame 4 and the gear case 15.

In the wiper unit 1 in this case, wiper frame fixing rivets 30 and 30 are used instead of the wiper frame fixing screws 6 and 6 used in the embodiment. Therefore, the wiper frame support portion 15d of the gear case 15 is formed with first and second rivet insertion holes 15d5 and 15d6, respectively, instead of the first and second screw holes 15d3 and 15d4 used in the embodiment. The gear case fixing portion 4d of the wiper frame 4 is formed with first and second rivet through holes 4d8, 4d9, respectively, instead of the first and second screw insertion holes 4d2, 4d3 used in the embodiment. The wiper frame cover 5 is formed with first and second rivet insertion holes 5a7 and 5a8 in place of the first and second screw insertion holes 5a2 and 5a3 used in the embodiment. Other parts are configured in the same manner as in the embodiment.

The wiper frame fixing rivets 30, 30 are connected to the first and second rivet through holes 4 d 8, 4 d 9 of the gear case fixing part 4 d of the wiper frame 4 from the first and second rivet insertion holes 5 a 7, 5 a 8 of the wiper frame cover 5. Is passed through the first and second rivet insertion holes 15d5 and 15d6 of the wiper frame support portion 15d of the gear case 15, and the outside of the gear case 15 is fixed by crimping.

In this case as well, the wiper frame fixing rivets 30 and 30 pass from the wiper frame cover 5 through the gear case fixing portion 4d of the wiper frame 4 and the wiper frame support portion 15d of the gear case 15 in the same manner as in the embodiment. When the caulking is fixed outside, a crushing load is applied to the gear case fixing part 4d of the wiper frame 4 from the upper side to the lower side of the gear case fixing part 4d in the hole direction of the first and second rivet through holes 4d8, 4d9. However, the wiper frame cover 5 and the wiper frame support portion 15d of the gear case 15 generate a reaction force against the crushing load on the gear case fixing portion 4d of the wiper frame 4, and the reaction force is a wiper frame fixing rivet 30, 30. Therefore, the wiper frame fixing rivets 30 and 30 are not loosened. Wiper frame 4 is intended to be rigidly coupled to the gear case 15.

FIG. 6 shows a wiper unit according to a second embodiment of the present invention, and shows only a connecting portion between the wiper frame 4 and the gear case 15.

In the wiper unit 1 in this case, in addition to the configuration of the embodiment, the wiper frame support portion 15d of the gear case 15 is disposed outside the first and second gear case side end portions 5a4 and 5a5 of the wiper frame cover 5. First and second notches 15d7 and 15d8 are formed. Other parts are the same as in the embodiment.

The first and second notches 15d7 and 15d8 are formed by screwing the wiper frame fixing screws 6 and 6 into the first and second screw holes 15d3 and 15d4 of the gear case 15 through the wiper frame cover 5 and the wiper frame 4, A crushing load is applied to the gear case fixing portion 4d of the wiper frame 4 from the first and second screw holding portions 4d4 and 4d5 toward the first and second round hole portions 4d6 and 4d7, and the gear case fixing of the wiper frame 4 is performed. A function for preventing the wiper frame 4 and the wiper frame cover 5 from being deformed in the left and right directions in FIG. 6 when stress is applied to increase the outer diameter of the portion 4d in the left and right directions in FIG. It has.

When the wiper frame fixing screws 6 and 6 are screwed into the first and second screw holes 15d3 and 15d4 of the gear case 15 through the wiper frame cover 5 and the wiper frame 4, the gear case fixing portion 4d of the wiper frame 4 is used. On the other hand, although a crushing load is applied from the upper side to the lower side of the gear case fixing portion 4d in the hole direction of the first and second screw insertion holes 4d2, 4d3, the wiper frame cover is covered by the first and second cutouts 15d7, 15d8. 5 is not deformed together with the wiper frame 4 by the crushing load, and a reaction force against the crushing load is generated in the gear case fixing portion 4d of the wiper frame 4, and the reaction force is the thrust of the wiper frame fixing screws 6 and 6. As a result, the wiper frame fixing screw screwed into the first and second screw holes 15d3 and 15d4 of the gear case 15 is obtained. , Without causing looseness 6, becomes the wiper frame 4 are firmly bonded to the gear case 15. Although not described here, the first and second cutouts 15d7 and 15d8 may be used in the first embodiment.

It is a partially broken top view of embodiment of the wiper unit concerning this invention. FIG. 2 is a front view around a wiper motor in the wiper unit shown in FIG. 1. It is sectional drawing of the gear case of the wiper motor in the wiper unit shown in FIG. FIG. 2 is a cross-sectional view of an assembly portion of a wiper motor gear case and a wiper frame in the wiper unit shown in FIG. 1. It is sectional drawing of the assembly | attachment part of the gear case and wiper frame of the wiper motor in Example 1 of the wiper unit concerning this invention. It is sectional drawing of the assembly | attachment part of the gear case and wiper frame of the wiper motor in Example 2 of the wiper unit concerning this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Wiper unit 2 Wiper motor 3 Motor arm 4 Wiper frame 4a Frame main body 4b (vehicle body side fixing | fixed part) 2nd vehicle body side fixing | fixed part 4b1 (pivot shaft support part) 1st pivot shaft support part 4c (vehicle body side fixing | fixed part) 3 vehicle body side fixing portion 4c1 (pivot shaft support portion) second pivot shaft support portion 4d gear case fixing portion 4d2 (screw insertion hole) first screw insertion hole 4d3 (screw insertion hole) second screw insertion hole
4d4 (screw holding portion) first screw holding portion
4d5 (screw holding portion) second screw holding portion
4d6 (round hole part) 1st round hole part
4d7 (Round hole part) Second round hole part 4d8 (Rivet through hole) First rivet through hole 4d9 (Rivet through hole) Second rivet through hole 5 Wiper frame cover
5a2 (Screw insertion hole) First screw insertion hole
5a3 (Screw insertion hole) Second screw insertion hole 5a4 (Gear case side end) First gear case side end 5a5 (Gear case side end) Second gear case side end 6 (Screw) Wiper frame fixing screw 7 (Link connecting rod) First link connecting rod 8 (Pivot arm) First pivot arm 9 (Pivot shaft) First pivot shaft 10 (Link connecting rod) Second link connecting rod 11 (Pivot arm) Second pivot arm 12 (Pivot shaft) Second pivot shaft 13 Motor yoke 14 Armature 15 Gear case 15d Wiper frame support 15d3 (Screw hole) First screw hole 15d4 (Screw hole) Second screw hole 15d5 (Rivet insertion hole) First Rivet insertion hole 15d6 (rivet insertion hole) second Bet insertion holes 15D7 (notch) first notch 15D8 (notch) second notch 21 output shaft 30 (rivets) wiper frame fixing rivets

Claims (3)

A wiper motor, a motor arm fixed to the output shaft of the wiper motor, a wiper frame formed in a pipe shape, a pivot shaft support portion coupled to an end of the wiper frame, and rotatable to the pivot shaft support portion A wiper unit comprising: a pivot shaft supported by the pivot shaft; a pivot arm coupled to the pivot shaft; and a link connecting rod coupled to the motor arm and the pivot arm, respectively. A screw insertion hole penetrating the upper part and a round hole part penetrating the lower part are respectively formed, and a gear case fixing part integrally formed with a screw holding part formed in a cylindrical shape surrounding the screw insertion hole is provided. The gear case of the wiper motor is formed with a screw hole, and the Pas wiper frame support portion capable of supporting a gear case fixed part of the frame is formed, is inserted into the screw insertion hole of the gear case fixing portion provided in the wiper frame, it is supported by the screw holding unit, and the gear case fixed A wiper unit comprising: a screw that is inserted into a round hole portion of the portion and screwed into a screw hole of a wiper frame support portion provided in the gear case to couple the wiper frame and the gear case. A wiper motor; a motor arm fixed to the output shaft of the wiper motor; a wiper frame having a pipe-shaped frame body; a pivot shaft support portion coupled to an end of the wiper frame; and the pivot shaft support A wiper unit comprising: a pivot shaft rotatably supported by a portion; a pivot arm coupled to the pivot shaft; and a link connecting rod coupled to the motor arm and the pivot arm, respectively. frame body frame, together with the round hole portion which penetrates the screw through hole and a lower passing through the upper portion are formed, the screw retaining portion formed in the cylindrical surrounding the screw insertion hole is formed integrally A gear case fixing portion is provided, and a screw hole is provided in the gear case of the wiper motor. Together are formed, the wiper wiper frame supporting portion capable of supporting a gear case fixed part of the frame is formed, is inserted into the screw insertion hole of the gear case fixing portion provided on the frame body of the wiper frame, the screw retaining And a screw for coupling the wiper frame and the gear case by being inserted into the screw hole of the wiper frame support portion provided in the gear case by being inserted into the round hole portion of the gear case fixing portion . A wiper unit characterized by that. A wiper motor, a motor arm fixed to the output shaft of the wiper motor, a frame main body formed in a pipe shape, a vehicle body side fixed portion coupled to an end of the frame main body, and a pivot shaft support portion A wiper frame; a pivot shaft rotatably supported on a pivot shaft support portion of the wiper frame; a pivot arm coupled to the pivot shaft; a motor arm; and a link connecting rod coupled to the pivot arm. a wiper units, the frame body of the wiper frame, together with the round hole portion which penetrates the screw through hole and a lower passing through the upper portion are formed, is formed into a cylindrical shape surrounding the screw insertion hole A gear case fixing portion integrally formed with the screw holding portion is provided, A screw hole is formed in the gear case of the wiper motor, and a wiper frame support portion that can support the gear case fixing portion of the wiper frame is formed. The wiper frame is inserted into a screw insertion hole of the gear case fixing portion provided in the wiper frame. It is, is supported by the screw holding unit, and coupling the wiper frame and the gear case by being inserted into the round hole of the gear case fixing part is threaded into the threaded hole of the wiper frame support unit provided in the gear case A wiper unit characterized by comprising a screw to perform.