KR102616145B1 - Steering coupling for increased durability - Google Patents

Abstract

The present invention relates to a steering coupling, which includes a cord assembly composed of connecting a plurality of cords formed by twisting a plurality of threads in the shape of an infinity symbol; and a binding portion provided on the cord assembly to maintain the shape of the cord.

Description

Steering coupling with increased durability {STEERING COUPLING FOR INCREASED DURABILITY}

The present invention relates to a steering coupling with increased durability, and more specifically, to a steering coupling with increased durability, which is composed of a plurality of cords having an infinity symbol shape to alleviate shock generated when driving a vehicle and improve steering performance. It's about the steering coupling.

Steering is a device that changes the direction of the rotation axis of the front wheels to change the direction of movement of the car, and is also called a steering device.

Currently, most cars are equipped with power steering, which allows drivers to easily operate the steering wheel.

Previously, hydraulic power steering was mainly used, but recently it is being converted to electric power steering (EPS; electric power steering).

Compared to hydraulic power steering, electric power steering can precisely control the steering force according to vehicle speed, has excellent fuel efficiency, is environmentally friendly because it uses electricity rather than oil, and, above all, has the advantage of being superior in equipment due to its smaller weight and volume than hydraulic power steering. there is.

Electric power steering allows the driver to easily operate the steering wheel by transmitting the driving force of an electric motor controlled by the ECU to the rotating shaft of the front wheel through a worm gear. A coupling is provided between the motor's drive shaft and the worm shaft to connect them. .

In general, couplings require a damping function to absorb shock and a function to absorb rotational force by absorbing deviation of the axis center.

However, in order to provide a damping function for shock absorption, conventional couplings are simply made of materials with elastic restoring force, or are limited to those that have a form that can disperse shock, thus reducing the driving time of the car. There is a problem in that durability gradually deteriorates.

Therefore, in order to solve the above problems, the present application developed a 'cord assembly for steering coupling with increased durability', applied for a patent, and received patent registration (Registration No. 10-2078469).

The cord assembly for a steering coupling patented by the present applicant has a structure in which a plurality of cords in the form of an infinity symbol are connected to each other, and these cords are molded together with injection resin to manufacture the coupling to form the framework of the coupling. perform its role.

However, the coupling configured as above has a problem in that the cord assembly composed of multiple cords is deformed because it receives external force and heat due to the continuous operation of the steering device as the vehicle travels, resulting in reduced durability.

In addition, since the cord is formed by twisting multiple strands of synthetic resin thread or metal thread several times, there is a problem that its shape is deformed by the internal pressure of the mold or the temperature of the resin during the molding process with injection resin. . In particular, a hole for fastening to the steering device is formed at the longitudinal end of the cord, but there is a problem in that the shape of this hole is distorted and cannot maintain its original shape due to external pressure.

Accordingly, the present applicant proposed the present invention to solve the above problems, and related prior art documents include 'Cord assembly for steering coupler with increased durability' in Korean Patent No. 10-2078469. .

The present invention is intended to solve the above problems, and provides a steering coupling designed to prevent a cord made of multiple strands from being deformed by external pressure and to improve the durability of the fastening hole for coupling with the steering device. The purpose is to provide

The present invention provides a steering coupling with increased durability, comprising a cord assembly composed of connecting a plurality of cords formed by twisting multiple strands of yarn in the shape of an infinity symbol, wherein an axis hole is provided in the center of the cord assembly. Fastening holes are provided at the corners, and hollow deformation prevention members are provided in the fastening holes to maintain the shape of the fastening holes.

In addition, it may further include a binding part provided on the cord assembly to maintain the shape of the cord.

In addition, the binding unit includes a first binding string that winds and binds the plurality of threads constituting the cord in a vertical direction, which is the thickness direction of the cord, and the first binding string is located at the midpoint in the longitudinal direction of the cord. It may be provided at the formed cross portion and the loop portion formed at the longitudinal end point of the cord.

In addition, the first tie string may be provided in at least one bundle to tie multiple strands of yarn forming the cross portion and the loop portion.

Additionally, the first binding string may be wound in an upward/downward direction to bind the multiple strands of yarn to each other while passing through the shaft hole or fastening hole.

In addition, the first binding strap can bind the cross portion or the ring portion formed on each of the plurality of cords stacked in the upward/downward direction to each other.

In addition, the binding unit may include a second binding string that wraps the outer portion of the cord forming the outer shell of the cord assembly in the horizontal direction, which is the longitudinal direction of the cord, in order to maintain the outer shape of the cord assembly. there is.

Additionally, the second tie string may be wound around the cord assembly so as to be in contact with a loop portion formed at an end point in the longitudinal direction of the cord while not contacting a cross portion formed at a midpoint in the longitudinal direction of the cord.

In addition, it may further include a hollow deformation prevention member provided in the fastening hole of the cord assembly to maintain the shape of the fastening hole.

Additionally, the deformation prevention member may be wound around the thread constituting the cord while being provided on a guide pin of a winding device used to manufacture the cord.

The steering coupling with increased durability according to the present invention binds a plurality of cords constituting the cord assembly to each other to prevent separation between cords, and at the same time binds the cross portion and loop portion of the cord to prevent multiple strands of thread from unraveling. Since it provides a structure that prevents damage, durability can be maintained without being deformed or damaged by external forces.

In addition, the steering coupling with increased durability according to the present invention provides a deformation prevention member that prevents the loop portion of the cord from being deformed, thereby preventing the fastening hole of the cord assembly from being formed outside of the set standards, and further, It can also prevent the fastening hole from being deformed by external force.

1 is a perspective view showing a cord assembly of a steering coupling according to an embodiment of the present invention.
Figure 2 is a plan view showing a state in which a binding portion is provided in the cord assembly shown in Figure 1.
Figure 3 is a plan view showing a state in which a deformation prevention member is inserted into the fastening hole of the cord assembly shown in Figure 2.
Figure 4 is a perspective view showing a state in which the deformation prevention member according to an embodiment of the present invention is inserted into the guide pin of the winding device.

The advantages and features of the present invention and methods for achieving them will become clear by referring to the embodiments described in detail below along with the accompanying drawings.

However, the present invention is not limited to the embodiments disclosed below and will be implemented in various different forms, but the present embodiments only serve to ensure that the disclosure of the present invention is complete and are within the scope of common knowledge in the technical field to which the present invention pertains. It is provided to fully inform those who have the scope of the invention, and the present invention is only defined by the scope of the claims.

Hereinafter, a steering coupling with increased durability according to the present invention will be described in detail with reference to FIGS. 1 to 4. In describing the present invention, detailed descriptions of related well-known functions or configurations are omitted in order to make the gist of the invention unambiguous.

Figure 1 is a perspective view showing a cord assembly of a steering coupling according to an embodiment of the present invention, Figure 2 is a plan view showing a state in which a binding portion is provided in the cord assembly shown in Figure 1, and Figure 3 is a diagram showing a state in which a binding portion is provided in the cord assembly shown in Figure 1. It is a plan view showing the deformation prevention member inserted into the hole of the cord assembly, and Figure 4 is a perspective view showing the deformation prevention member according to an embodiment of the present invention inserted into the guide pin of the winding device.

As shown in FIG. 1, a steering coupling with increased durability according to an embodiment of the present invention may include a cord assembly 100 that is molded with injection resin and serves as a framework.

The cord assembly 100 is formed by connecting a plurality of cords 200 with an infinity symbol in the upper/lower and longitudinal directions, and an axis hole 110 through which the steering axis can pass is formed in the center and at the corners. Each part is formed with a fastening hole 120 for fastening with a device constituting the steering.

The cord 200 is formed by repeatedly twisting a synthetic resin thread or a metal thread into the shape of an infinity symbol. In this process, the thread is overlapped into multiple strands to form the thickness of the cord 200.

A cross portion 210 that intersects each other is formed in the longitudinal middle portion of the cord 200 in the process of twisting the yarn into an infinity symbol shape, and the fastening hole 120 is defined at the longitudinal end of the cord 200. A ring portion 220 is formed. Therefore, it can be said that the thickness of the cross portion 210 of the cord 200 is relatively larger than the thickness of the ring portion 220.

For reference, as shown in FIG. 4, after winding the yarn into an oval shape using a pair of guide pins (P) provided in the winding device 10, the longitudinal end of the yarn having an oval shape is The code 200 can be produced by rotating it in one direction or the other and changing it into a form with an infinity symbol.

Since the cord assembly 100 is a component that forms the framework of a coupling, it may have various shapes corresponding to the shape of the coupling to be manufactured.

That is, the plurality of cords 200 constituting the cord assembly 100 can be arranged and connected in various ways under the premise that the axial hole 110 and the fastening hole 120 are essentially formed.

As shown in Figures 1 and 2, the cord assembly 100 according to an embodiment of the present invention connects a plurality of cords 200 in the upper/lower, horizontal, and vertical directions to form an overall square frame. It is shown on the drawing as having .

To be more specific, a pair of lower cords 200 arranged to be spaced apart from each other, and a pair of lower cords 200 stacked in a direction crossing the longitudinal direction of the lower cord 200. A middle cord 200 and a pair of upper cords stacked on the middle cord 200 in a state that intersects the longitudinal direction of the middle cord 200 but is arranged in the same direction as the longitudinal direction of the lower cord 200 (200) may be organically connected to each other to form the code assembly (100). At this time, the ring portions 220 formed on the code 200 disposed at the bottom, the code 200 disposed in the middle, and the cord 200 disposed at the top, respectively, are stacked to correspond to each other.

For reference, the configuration of manufacturing the code assembly 100 using a plurality of codes 200 is specifically disclosed in Patent No. 10-2078469 applied and registered by the present applicant, so the specification of the present invention Explanation is omitted.

Accordingly, the ring portion 220 formed on the code 200 disposed at the bottom, the cord 200 disposed in the middle, and the cord 200 disposed at the top, respectively, are connected to the fastening hole 120 of the cord assembly 100. Divisions can be formed. In addition, a portion of the cross portion 210 and the ring portion 220 of the cords 210 define the shaft hole 110 of the cord assembly 100.

Additionally, the steering coupling according to an embodiment of the present invention may include a coupling portion 300, as shown in FIGS. 2 and 3.

The binding portion 300 is provided in the cord assembly 100 and serves to maintain the shape of the cord 200. That is, the binding portion 300 serves to maintain the durability of the cord assembly 100 by preventing the cord 200 from being deformed or moved due to external pressure.

As shown in FIG. 2, the binding unit 300 winds and binds the multiple strands of yarn constituting the cord 200 in the vertical direction, that is, the upward/downward direction, which is the thickness direction of the cord 200. Includes a first tie string 310.

The first binding strap 310 may be provided at a cross portion 210 formed at a longitudinal midpoint of the cord 200 and a loop portion 220 formed at a longitudinal end point of the cord 200. That is, the first binding string 310 can tie and bind multiple strands of yarn forming the cross portion 210 and the loop portion 220, and is provided in at least one.

The first binding string 310 passes through the axial hole 110 or fastening hole 120 formed by the cord assembly 100 and is wound in an upward/downward direction to bind multiple strands of yarn to each other. The cross portions 210 or ring portions 220 formed on the plurality of cords 200 stacked downward may be bound to each other. In other words, the first binding string 310 can not only tie the cross portion 210 or the ring portion 220 formed on one cord 200, but also cross portions formed on each of a plurality of cords 200 ( 210) or the ring portion 220 may be tied together.

In addition, as shown in FIG. 2, the binding unit 300 connects the outer portion of the cord 200 forming the outer shell of the cord assembly 100 in order to maintain the outer shape of the cord assembly 100. It may include a second tie string 320 wound in the horizontal direction, which is the longitudinal direction of the cord 200.

The second binding string 320 serves to prevent the shape of the cord assembly 100 from being distorted from external pressure by wrapping the outside of the plurality of cords 200 constituting the cord assembly 100 a plurality of times.

The second binding string 320 may be wrapped around the cord assembly 100 along the height direction of the multiple stacked cords 200. In other words, the second tie string 320 may be wound to surround the entire circumference of the cord assembly 110.

At this time, the second tie string 220 is in non-contact with the cross portion 210 formed at the longitudinal midpoint of the cord 200 and the loop portion formed at the longitudinal end point of the cord 200 ( The cord assembly 100 can be wound so as to be in contact with 210).

The binding portion 300 configured as described above prevents the cord assembly 100 from being deformed by external pressure, and in particular, the cord assembly 100 withstands the injection pressure of the injection resin used in the molding process and maintains its original shape. to be able to maintain.

In addition, the steering coupling according to an embodiment of the present invention, as shown in FIG. 3, is provided in the fastening hole 120 of the cord assembly 100 and maintains the shape of the fastening hole 120. It may further include a deformation prevention member 400.

The deformation prevention member 400 is provided on the guide pin (P) of the winding device 10 used to manufacture the cord 200, and can be wound around the thread constituting the cord 200. . That is, in order to manufacture the cord 200, the deformation prevention member 400 may be provided on the guide pin (P) in advance from the process of winding the yarn around the guide pin (P).

Accordingly, when the cord 200 is manufactured, the deformation prevention member 400 is inserted inside the ring portion 220 formed at the longitudinal end of the cord 200.

For reference, the deformation prevention member 400 may be made of plastic or metal.

Although specific embodiments according to the present invention have been described so far, it goes without saying that various modifications are possible without departing from the scope of the present invention.

Therefore, the scope of the present invention should not be limited to the described embodiments, but should be determined by the scope of the patent claims described below as well as equivalents to the claims of this patent.

100: Code assembly
110: shaft hole
120: fastening hole
200: code
210: cross area
220: Ring area
300: Binding part
310: 1st binding strap
320: Second binding strap

Claims (9)

In a steering coupling with increased durability,
It includes a cord assembly composed of connecting a plurality of cords formed by twisting multiple strands of yarn in the shape of an infinity symbol,
An axis hole is provided in the center of the cord assembly and fastening holes are provided in the corners, respectively.
A steering coupling with increased durability, characterized in that a hollow deformation prevention member is provided in the fastening hole to maintain the shape of the fastening hole.
According to claim 1,
A steering coupling with increased durability, further comprising a binding portion provided on the cord assembly to maintain the shape of the cord.
According to claim 2,
The binding part,
It includes a first binding string that winds and binds the plurality of threads constituting the cord in a vertical direction, which is the thickness direction of the cord,
A steering coupling with increased durability, wherein the first tie string is provided at a cross portion formed at a midpoint in the longitudinal direction of the cord and a loop portion formed at a longitudinal end point of the cord.
According to claim 3,
A steering coupling with increased durability, wherein at least one first tie string is provided to tie a plurality of threads forming the cross portion and the loop portion.
According to claim 4,
A steering coupling with increased durability, wherein the first binding string passes through the shaft hole or fastening hole and is wound in an upward/downward direction to bind the plurality of threads to each other.
According to claim 5,
The first tie string is,
A steering coupling with increased durability, characterized in that the cross portion or the ring portion formed on the plurality of cords stacked in the upper/lower direction are bound to each other.
According to claim 3,
The binding unit includes a second binding string that wraps around the outer portion of the cord forming the outer shell of the cord assembly in the horizontal direction, which is the longitudinal direction of the cord, in order to maintain the outer shape of the cord assembly. Steering coupling with increased durability.
According to claim 7,
The second tie string has increased durability, characterized in that it winds the cord assembly so that it is not in contact with the cross portion formed at the midpoint in the longitudinal direction of the cord and is in contact with the loop portion formed at the longitudinal end point of the cord. Steering coupling.
According to claim 1,
A steering coupling with increased durability, wherein the deformation prevention member is wound around the thread constituting the cord while being provided on a guide pin of a winding device used to manufacture the cord.

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