JP3011446U - Wiper drive shaft for vehicle - Google Patents

Abstract

(57) [Abstract] [Purpose] The present invention stabilizes the contact surface 7a with the pivot arm 7 by integrally forming the collar portion 2a that comes into contact with the pivot arm 7 by cold forging, and is hygienic because it does not require cutting. It is an object of the present invention to provide a wiper drive shaft for a vehicle in which only the knurled outer diameter 5a of the caulking portion 5 can be changed according to the required strength (rotation torque, tilting strength). A wiper drive shaft 1 for converting a reciprocating oscillating motion of a link arm 13 from a motor 11 via a motor arm 12 into a reciprocating oscillating motion of a wiper arm 14 of a link mechanism of a vehicle wiper. The wiper drive shaft main body 2 is provided at one end thereof with a flange portion 2 a that comes into contact with the pivot arm 7.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a wiper device for a vehicle, and more particularly, to an improvement of a wiper drive shaft for a vehicle, which causes a wiper arm to move back and forth in a predetermined wiping range.

[0002]

[Prior art]

 Conventionally, as shown in FIGS. 3 and 4, the wiper drive shaft A in the link mechanism of the vehicle wiper has been processed in the order of full cutting of the bar material, rolling of the serration portion B, and rolling of the screw portion C. Only the contact surface D1 with the pivot arm 7 having a diameter of D or less can be taken, and the knurl outer diameter F of the caulking portion E cannot be increased, so that it is attempted to satisfy the requirements such as increasing the rotation torque and providing the tilting strength. Has the drawback that all changes from the material shaft diameter D are required, and if the material shaft diameter D is increased, the cost will increase accordingly, and the chips during processing will increase, which is not very hygienic.

[0003]

[Problems to be solved by the device]

 Therefore, the problem to be solved by the present invention is to solve the above-mentioned drawbacks, and by providing the collar portion 2a which comes into contact with the pivot arm 7 by cold forging integrally, the contact surface 7a with the pivot arm 7 is stabilized. By providing the wiper drive shaft 1 for a vehicle, which is hygienic because it does not need to be cut, and in which only the knurled outer diameter 5a of the caulking portion 5 can be changed according to the required strength (rotating torque, tilting strength). is there.

[0004]

[Means for Solving the Problems]

 In the wiper drive shaft 1 for converting the reciprocal swing motion of the link arm 13 from the motor 11 via the motor arm 12 into the reciprocal swing motion of the wiper arm 14 of the vehicle wiper link mechanism, the wiper drive of the wiper drive shaft 1 is performed. A means for providing a collar portion 2a that comes into contact with the pivot arm 7 is provided at one end of the shaft body 2.

[0005]

Since the present invention has taken the above-mentioned means, it is possible to easily secure the squareness when the wiper drive shaft 1 is inserted and fitted in the attachment insertion hole 6 of the pivot arm 7, and after the assembling. It has an effect of improving the rotation torque and the collapse strength of the.

[0006]

【Example】

 The present invention will be described below with reference to the drawings.

Embodiment 1 FIG. 1 is a front view showing an embodiment of a vehicle wiper drive shaft adopted in the present invention, in which a wiper drive shaft main body 2 is processed in cold forging, and a wiper arm is attached to a tip thereof. 14 is provided with a screw portion 4 that is connected to the wiper arm 14, and a serration portion 3 that is also fitted to the wiper arm 14 is provided, and a knurled outer diameter 5a is provided at the rear end of the caulking portion 5 and the contact surface 7a with the pivot arm 7 The collar portion 2a is provided integrally. FIG. 2 is a cross-sectional view showing an example of assembling the wiper drive shaft 1 for a vehicle adopted in the present invention. The wiper drive shaft main body 2 is inserted and fitted into the attachment insertion hole 6 of the pivot arm 7 and caulked. The caulking portion 5 is deformed and fixed in the construction method.

Example of Use 1 FIG. 5 is a perspective view showing an example of use in a wiper link mechanism when a wiper drive shaft for a vehicle adopted in the present invention is assembled. The motor 11 is linked via a motor arm 12 to a link. It is used as the wiper drive shaft 1 for converting the reciprocating swing motion of the arm 13 into the reciprocating swing motion of the wiper arm 14.

[0009]

[Effect of device]

 In the wiper drive shaft 1 of the present invention, as compared with the prior art as shown in FIGS. 3 and 4, since the collar portion 2a is integrally provided on the contact surface 7a with the pivot arm 7, the contact area of the pivot arm 7 is increased. The squareness is increased, so that the squareness can be easily ensured during assembly for insertion and fitting into the mounting insertion hole 6, and the rotation torque and fall strength after assembly can be improved and required strength can be achieved. Accordingly, only the knurled outer diameter 5a of the crimped portion 5 can be easily changed, and the material shaft diameter D does not have to be changed significantly. Therefore, the cost is correspondingly low, and in cold forging as in Example 1, Since it is processed, it is much more hygienic than cutting.

[Brief description of drawings]

FIG. 1 is a front view showing an embodiment of the present invention.

FIG. 2 is a sectional view showing an assembly example of the present invention.

FIG. 3 is a front view showing a conventional example.

FIG. 4 is a sectional view showing an assembly example of a conventional example.

FIG. 5 is a perspective view showing an example of use of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Wiper drive shaft 2 ... Wiper drive shaft main body 2a ... Collar part 3 ... Serration part 4 ... Screw part 5 ... Caulking part 5a ... Knurling outer diameter 6 ... Mounting insertion hole 7 ... Pivot arm 7a ... Contact surface 11 ... Motor 12 ... Motor arm 13 ... Link arm 14 ... Wiper arm A ... Wiper drive shaft B ... Serration part C: screw part D: material shaft diameter D1: contact surface E: caulking part F: knurled outer diameter

Claims (1)

[Scope of utility model registration request] 1. A motor 1 for a vehicle wiper link mechanism.
In the wiper drive shaft 1 for converting the reciprocating oscillating motion of the link arm 13 into the reciprocating oscillating motion of the wiper arm 14 from the motor arm 12, the pivot arm 7 is attached to one end of the wiper drive shaft main body 2 of the wiper drive shaft 1. A wiper drive shaft for a vehicle, which is provided with a collar portion 2a that comes into contact with the wiper drive shaft.