Automobile windscreen wiper spring tensioner

Abstract

The invention relates to devices for providing visibility while driving, and more particularly to automobile windscreen wipers. A tensioner of an automobile windscreen wiper spring is comprised of two plates connected to one another at an angle by respective side faces, wherein each of said plates has holes therein. The structure of the tensioner makes it possible to increase the distance between the hooks of an extension spring on the arm of a windscreen wiper, wherein the presence of several holes at different distances from one another makes it possible to select the desired force with which the windscreen wiper arm is pressed against the windscreen on the basis of the extension of the extension spring. The plates are rectangular and are connected to one another at a right angle. The holes have rounded rims. The end face parts of the tensioner have concave edges. The plates are made of plastic or metal. The invention makes it possible to provide an increase in the force with which a windscreen wiper arm is pressed against a windscreen in the case of different degrees of extension of the spring.

Description

[0001] CAR WIPER SPRING TENSIONER

[0002] DESCRIPTION

[0003] The windshield wiper spring tensioner is a device for ensuring visibility while driving, for vehicles [B6OS1 / OO, B6OS1 / 2O, B6OS1 / 32, B60S1 / 34, B60S1 / 38],

[0004] A WINDSHIELD WIPER LEVER is known from the prior art [RU2160198C1-2000-12-10]. The invention relates to transport equipment and can be used in the design of a windshield wiper arm for an automobile windshield wiper. The prototype of the claimed invention uses the design of a windshield wiper arm (application PCT 89 / 00936, MK B60S1 / 34, published 09.02.89), which includes a drive head with a recess, a hinge axis and an arbor axis located in the recess, a lever housing with a lever pivotally connected to the drive head, a coil spring and an arbor. The arbor is engaged with the arbor axis, and the coil spring connects the arbor to the lever. The advantage of the prototype is the presence of a recess on the hinge axis, which allows the earring to be centered in the recess when the lever is moved to the idle position.A design flaw is the lack of means for centering the coil spring in the operating position of the lever housing relative to the head, which allows the clevis to move along the surface of the clevis axis toward one of the recess walls and rub against the wall of the drive head recess. The invention solves the problem of centering the clevis in the drive head recess. This objective is achieved in the claimed windshield wiper arm design, which includes a drive head with a recess, a hinge axis and a clevis axis located in a recess, a lever housing with a lever pivotally attached to the head axis, a clevis engaged with the clevis axis, and a coil spring connecting the lever to the clevis. The problem is solved by making a notch on the clevis axis, the width of which is greater than or equal to the radius of the clevis cross-section. Figure 1 shows the windshield wiper arm. Figure 2 shows the connection of the clevis with the clevis axis of the drive head. The invention can be implemented in the arrangement of a windshield wiper arm (see Fig.1), including a drive head 1 with a recess 2, a hinge axis 3 and a hinge axis 4 located in a recess 2, a lever housing 5 with a lever 6 pivotally fixed on axis 3, a coil spring 7, one end of which is connected to the lever 6, and an earring 8 connects the second end of the spring 7 to the earring axis 4. To implement the invention, a recess 9 can be formed in the central part of the earring axis 4 (see Figure 2). The end of the earring 8 is partially recessed into the recess 9 intended for engagement with the earring axis 4. To reliably hold the end of the earring 8 in the central part of the earring axis 4, the width of the recess 9 is made equal to or greater than the radius of the cross-section of the earring 8. A disadvantage of this analogue is insufficient tightness of pressing the windshield wiper blade to the windshield. The closest in technical essence is the WIPER SPRING TENSIONER [https: / / plastik-avto.[ru / collection / natyazhitel-pruzhiny-dvornika-stekloochistitelya], which is a rectangular bar made of polyamide, containing a stop rib for mounting in the windshield wiper trapezoid and a tension rib, which ensures movable contact between the windshield wiper spring tensioner and the spring mounting axis. A rectangular opening extends from the center of the windshield wiper spring tensioner toward the spring mounting axis. One side of the opening, located on the spring side, has a rounded shape and is designed for mounting the spring, hence its name, the retaining rib. The tension force of the windshield wiper spring is determined by using tensioners with different tension distances.The disadvantage of this analogue is the need to use several tensioners with different tension distances to ensure the required spring tension force and the density of the wiper contact.

[0005] The technical result of the invention consists in increasing the pressing force of the windshield wiper arm to the glass at various extensions of the extension spring.

[0006] The stated technical result is achieved due to the fact that the spring tensioner of the automobile windshield wiper is made of two plates connected to each other by side walls at an angle, with holes made in each of the plates.

[0007] In particular, the plates are connected to each other at right angles.

[0008] In particular, the plates are made rectangular.

[0009] In particular, the holes are made with rounded edges.

[0010] In particular, the end parts of the tensioner are made with concave edges.

[0011] In particular, the plates are made of plastic.

[0012] In particular, the plates are made of metal. Brief description of the drawings.

[0013] Fig. 1 shows the options for placing the tensioner.

[0014] Fig. 2 shows an embodiment of a tensioner with a base and a mount.

[0015] Fig. 3 shows a variant of the placement of the tensioner with a base and a mount in the windshield wiper arm with a pin.

[0016] Fig. 4 shows an embodiment of a tensioner with a base and a mount, with a partially rounded hole.

[0017] Fig. 5 shows an embodiment of a tensioner made from a bar with two holes.

[0018] Fig. 6 shows a variant of placing a tensioner from a bar with two holes in a windshield wiper arm with a pin.

[0019] Fig. 7 shows an embodiment of a tensioner consisting of two bars with two holes.

[0020] Fig. 8 shows a variant of the tensioner placement consisting of two bars with two holes in the windshield wiper arm with a pin.

[0021] Figures 1-8 show: 1 - windshield wiper arm, 2 - tension spring, 3 - pin, 4 - hook, 5 - base, 6 - fastening, 7 - hole, 8 - rounded edge, 9 - mating rounding, Implementation of the invention

[0022] The tensioner is mounted on the windshield wiper arm 1 behind the extension spring 2, which is secured with its upper hook to the pin 3 or to the catch 4 (Fig. 1). In this case, the tensioner comprises two zones, a base 5 and a fastening 6 (Fig. 2). The base 5 ensures the tensioner is held in the windshield wiper arm 1, the fastening 6 ensures additional tension of the extension spring 2 and strengthening of the contact. In the embodiment, the base 5 is made in the form of an elongated trapezoid (Figs. 3, 4). In this case, in the fastening 6, an opening 7 with rounded flanges 8 is made, and the side of the fastening 6 facing the pin 3 is made with a mating rounding 9. In the embodiment, the rounding of flange 8 in the opening 6 is made only on the side where the pin 3 is located (Fig. 4).

[0023] In the embodiment (Fig. 5, 6), the tensioner is made in the form of a single rectangular bar in which two holes 7 with rounded sides 8 are made, the holes 7 in the bar are made at different distances from the short sides of the bar, made with a matching rounding 9, to provide a different tension force of the extension spring 2. In the embodiment (Fig. 7, 8), the tensioner is made of two plates (flat bars, in the embodiment, rectangular), connected at an angle (in the embodiment, at an angle of 90 degrees), in each of which holes are made (in the embodiment, two holes 7) with rounded sides 8, the holes 7 in the plate are made at different distances from the short sides of the plates. The end parts of the plates are made with a matching rounding 9. The specified design provides a different tension force of the extension spring 2.

[0024] The invention is used as follows

[0025] In automobiles, windshield wiper arm 1 is pressed against the glass by extension spring 2. The most common two spring attachment options are pin 3 or hook 4, as shown in Fig. 1. During vehicle operation, the pressing force of windshield wiper arm 1 may weaken over time due to a decrease in the stiffness of extension spring 2. Also, in a new vehicle, the pressing force may be insufficient for effective cleaning of the glass. To increase the pressing force of windshield wiper arm 1, increase the distance between the hooks of extension spring 2 on windshield wiper arm 1. Tensioners made of plastic or metal can be used for this purpose. In this case, the tensioner is located inside windshield wiper arm 1, extension spring 2 is hooked into opening 7 onto rounded edge 8, and the mating rounding 9 rests against pin 3 or hook 4.The presence of two rectangular strips connected at a right angle provides several holes 7 in which an extension spring can be fixed in order to achieve the required level of tension.

[0026] The technical result—increasing the windshield wiper arm pressing force against the glass, with various values ​​of extension spring 2—is achieved by the tensioner design increasing the distance on windshield wiper arm 1 between the hooks of extension spring 2. Moreover, by providing multiple openings 7 at varying distances from one another (including their location in different planes), it is possible to select the desired increase in the windshield wiper arm pressing force depending on the extension spring 2, thereby ensuring increased pressing force of the windshield wiper cable against the glass. This design also enables the creation of small tensioners due to the openings being located on planes in two projections. The use of the specified materials in the embodiments ensures the strength of the tensioner.The blades can be positioned at various angles (depending on the vehicle they're being mounted on), including a 90-degree angle. If there are obstructions above, the angle can be adjusted to a more acute angle. The rectangular shape is used in this embodiment, as it's suitable for installation in the windshield wiper arm of most vehicles.

[0027] Examples of implementation.

[0028] An example implementation is shown in Figs. 7 and 8. This design utilizes two rectangular plates arranged at right angles, each with two holes. The holes have rounded edges, ensuring secure hook attachment; the tensioner's end sections have rounded edges, reducing the likelihood of mechanical deformation during operation. The cambered design allows for increased wiper arm contact force with spring extensions ranging from 0.2 mm (nearest hole on the horizontal plane) to 4 mm (farthest hole on the vertical plane).

Claims

FORMULA 1. The car windshield wiper spring tensioner is made of two plates connected to each other by their side walls at an angle, with holes made in each plate.

2. The tensioner according to item 1, characterized in that the plates are connected to each other at a right angle.

3. The tensioner according to item 1, characterized in that the plates are made rectangular.

4. The tensioner according to item 1, characterized in that the holes are made with rounded edges.

5. The tensioner according to item 1, characterized in that the end parts of the tensioner are made with concave edges.

6. The tensioner according to item 1, characterized in that the plates are made of plastic.

7. The tensioner according to item 1, characterized in that the plates are made of metal.

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