KR20140082465A

KR20140082465A - Appratus for adjusting clearance of yoke

Info

Publication number: KR20140082465A
Application number: KR20120152474A
Authority: KR
Inventors: 신웅수
Original assignee: 주식회사 만도
Priority date: 2012-12-24
Filing date: 2012-12-24
Publication date: 2014-07-02

Abstract

Provided is a yoke clearance adjusting device, which is constructed to have an anchor bolt type, thereby enhancing a coupling force. Therefore, the device can adjust the clearance of a yoke without performing a traditional coking process and without using a lock nut. The yoke clearance adjusting device comprises a support yoke (220), which is located on the back of a rack bar (210) and is installed to be slide inside a rack housing (250) in order to apply pressure to the rack bar (210); a spring (230), which applies an elastic force to the support yoke (220); and a yoke plug, which adjusts pressure applied to the other side of the spring (230) in order to adjust the elastic force applied to the support yoke (220) by one side of the spring (230). The yoke plug is an anchor bolt type and is divided into two parts.

Description

{APPRATUS FOR ADJUSTING CLEARANCE OF YOKE}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a yoke clearance regulating device, and more particularly, to a yoke clearance regulating device configured to be able to adjust a yoke clearance without a caulking process and a locknut application.

The steering apparatus of the vehicle is a device for changing the traveling direction of the vehicle according to the driver's intention, and is a device for assisting the driver to move the vehicle in a desired direction by arbitrarily changing the turning center of the front wheel of the vehicle.

1 is a schematic configuration diagram showing an example of a general rack-pinion type steering apparatus.

As shown in the drawing, the conventional rack-pinion type steering system includes a steering wheel 100 disposed in a driver's seat, a steering shaft 105 connected to the steering wheel 100, a steering column 103 for fixing the steering shaft to the vehicle body, A gear box 130 including a rack gear 110 and a pinion gear 120 for converting a rotational force inputted from the rack gear 110 into a linear motion, a rack bar 140 having inner ball joints 135 at both ends thereof, A tie rod 150 formed integrally with the ball of the joint 135 and an outer ball joint 155 provided at an end of the tie rod 150.

In the case of a rack and pinion gear type steering apparatus, an inner ball joint 135 is provided at left and right ends of a rack bar 140 formed with a rack gear 110, And is connected to the tie rod 150. The tie rod 150 is connected to the knuckle 159 of the tire 158 in connection with the outer ball joint 155.

2 is a side cross-sectional view showing a gearbox of a rack pinion type in another example of a conventional rack pinion type steering apparatus.

The rack-pinion type gear box 200 shown in FIG. 2 includes a pinion shaft 260, a rack bar 210, a support yoke 220, a spring 230, a yoke plug 240, and a rack housing 250 . The rack-pinion gear type gear box 200 allows the rotational force input from the steering shaft to be converted into a linear motion.

The pinion shaft 260 is connected to an input shaft 270 connected to a steering shaft via a torsion bar 265 and transmits a rotational force from the input shaft 270 to the rack bar 210, The motion can be converted into a linear motion.

The rack bar 210 includes a ball joint at both ends with a circular rod crossing between the front wheels of the automobile and a rack gear meshing with the pinion gear of the pinion shaft 260 is formed between the ball joints at both ends.

The support yoke 220 adjusts the clearance between the rack bar 210 and the pinion shaft 260 so that power can be smoothly transmitted. The support yoke 220 is positioned on the opposite side of the rack gear 210 on the rear side of the rack bar 210. The support yoke 220 is inserted into the rack housing 250 having the cylindrical cylindrical inner space and is movable back and forth .

The support yoke 220 has a cylindrical shape so as to be slidable back and forth in a cylindrical cylindrical inner space of the rack housing 250. A front portion of the support yoke 220 in contact with the rack bar 210 is in close contact with the rear surface of the rack bar 210 And a semicircular groove is formed thereon.

A spring 230 is disposed at a rear portion of the support yoke 220 so that the rack bar 210 and the pinion shaft 260 can closely contact each other and effectively transmit power transmission. The yoke 220 is pushed toward the rack bar 210 to reduce the clearance generated between the rack bar 210 and the pinion shaft 260.

The support yoke 220 is slidingly frictionally engaged with the rear surface of the rack bar 210 and is generally more flexible than the rack bar 210 in order to prevent the rack bar 210 from being worn or noise- It is generally formed of a plastic material.

A coil spring is generally used as a spring 230 for applying pressure to the support yoke 220 so that the support yoke 220 is in close contact with the rack bar 210. A yoke plug 240 is positioned on the rear surface of the spring 230, (Not shown).

The yoke plug 240 supports the spring 230 so that an elastic force of the spring 230 is applied to the support yoke 220. The yoke plug 240 is normally formed with a male thread type thread, So that it can be coupled to the rack housing 250.

Further, the yoke plug 240 has a groove formed therein on the rear surface thereof, into which a wrench can be inserted. Accordingly, when the yoke plug 240 is coupled or the clearance between the rack bar 210 and the pinion shaft 260 is increased, the wrench is engaged with the upper groove to adjust the elastic force of the spring 230 to adjust the yoke clearance .

However, in the case of the conventional yoke plug 240 as described above, after the yoke clearance is adjusted, a caulking process is performed or a locknut is applied to fix the yoke plug 240. However, in the case of performing the caulking process, it is difficult to rework the yoke clearance. There is a problem that productivity is deteriorated because additional production time is required.

Further, when the locknut is applied, there is a problem of cost increase.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a yoke gap adjusting device capable of adjusting a yoke clearance without applying a caulking process and a locknut in the prior art since the fastening force can be enhanced by providing an anchor bolt type .

In order to accomplish the above object, the present invention provides a yoke clearance adjusting apparatus comprising: a support yoke disposed on a rear surface of a rack bar and slidably installed in a rack housing to apply pressure to the rack bar; And a yoke plug which adjusts a pressure applied to the other side of the spring so that an elastic force applied by one side of the spring to the support yoke can be adjusted. The yoke plug is an anchor bolt type, .

Wherein the yoke plug includes an anchor housing member slidably movably installed in the rack housing and contacting the other side of the spring to adjust a pressure applied to the other side of the spring and an anchor housing member coupled to the inside of the anchor housing member, And an anchor bolt member for increasing the volume of the member to fix the anchor housing member at a predetermined position inside the rack housing.

Wherein the anchor housing member is formed with a coupling groove formed so as to gradually decrease in diameter toward the inside thereof and the anchor bolt member is formed into a cylindrical shape having a diameter corresponding to the largest diameter of the coupling groove of the anchor housing member desirable.

Preferably, the engagement groove of the anchor housing member is formed with a female thread and the outer periphery of the anchor bolt member is formed with a male thread-like thread to be screwed with the female thread.

And the anchor housing member is formed with a cut-off hole for guiding the volume of the anchor housing member to expand smoothly when the volume thereof is expanded by engagement with the anchor bolt member.

According to the yoke clearance adjusting device as described above, since the anchor bolt type is employed, the fastening force can be enhanced, so that the yoke clearance can be adjusted without using the conventional caulking process and locknut. Thus, .

1 is a schematic diagram showing an example of a conventional conventional rack-pinion steering system.
2 is a side sectional view showing a rack-pinion type gear box in another example of a conventional rack-pinion type steering apparatus.
FIG. 3 is a view showing a yoke plug applied to a yoke clearance adjusting device according to an embodiment of the present invention, showing a state before the anchor housing member and the anchor bolt member constituting the yoke plug are engaged.
FIG. 4 is a view showing a yoke plug applied to the yoke clearance adjusting device according to the embodiment of the present invention, in which the anchor housing member and the anchor bolt member constituting the yoke plug are combined.

BRIEF DESCRIPTION OF THE DRAWINGS The objectives, specific advantages and novel features of the present invention will become more apparent from the following detailed description taken in conjunction with the accompanying drawings, in which: FIG. In the following description of the present invention, detailed description of known related arts will be omitted when it is determined that the gist of the present invention may be unnecessarily obscured by the present invention. Also, the thickness of the lines and the size of the components shown in the drawings may be exaggerated for clarity and convenience of explanation. In addition, terms used are terms defined in consideration of functions in the present invention, which may vary depending on the intention or custom of the user, the operator. Therefore, definitions of these terms should be based on the entire contents of the present specification.

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

FIG. 3 is a view showing a yoke plug applied to the yoke clearance adjusting device according to an embodiment of the present invention, showing a state before the anchor housing member and the anchor bolt member constituting the yoke plug are engaged, and FIG. 1 is a view showing a yoke plug applied to a yoke clearance regulating apparatus according to an embodiment, wherein an anchor housing member and an anchor bolt member, which constitute a yoke plug, are combined;

Referring to FIGS. 3 and 4 and partially to FIG. 2 described above, the yoke clearance adjusting device according to the embodiment of the present invention is positioned at the rear side of the rack bar 210 to apply pressure to the rack bar 210 A spring 230 for applying an elastic force to the support yoke 220 and a spring 230 for supporting one side of the support yoke 220. The support yoke 220 is slidably installed in the rack housing 250, And a yoke plug for adjusting a pressure applied to the other side of the spring 230 so that an elastic force applied to the spring 220 can be adjusted.

The support yoke 220 serves to smoothly transmit power by adjusting the clearance between the rack bar 210 and the pinion shaft 260. The support yoke 220 supports the rack bar 210, And is inserted into a rack housing 250 in which a cylindrical cylindrical inner space is formed and is movable back and forth.

The support yoke 220 has a cylindrical shape so as to be slidable back and forth in a cylindrical cylindrical inner space of the rack housing 250. The front portion of the support yoke 220, which is in contact with the rack bar 210, is in close contact with the rear surface of the rack bar 210 And a semicircular groove is formed so as to be able to be formed.

The support yoke 220 is slidingly frictionally engaged with the rear surface of the rack bar 210 and is more flexible than the rack bar 210 in order to prevent the rack bar 210 from being worn or noise- It is preferable to be formed of a plastic material.

The spring 230 is disposed at a rear portion of the support yoke 220 so that the rack bar 210 and the pinion shaft 260 closely contact with each other to transmit power effectively. (210) so that the clearance generated between the rack bar (210) and the pinion shaft (260) can be reduced. As the spring 230, it is preferable to use a coil spring in consideration of function and durability.

The yoke plug is an anchor bolt type and is divided into two parts.

That is, the yoke plug is slidably installed in the rack housing 250, and contacts the other side of the spring 230 to adjust the pressure applied to the other side of the spring 230. The anchor housing member 330 And an anchor housing member 330 coupled to an inner side of the anchor housing member 330 to increase the volume of the anchor housing member 330 to fix the anchor housing member 330 at a predetermined position in the rack housing 250. [ And a bolt member (340).

The anchor housing member 330 includes a substantially cylindrical body B and a coupling groove 331 formed in the body B such that the diameter gradually decreases toward the inner side. 331 are formed in a trapezoidal shape on the side sectional view as shown in Fig.

The anchor bolt member 340 is formed in a cylindrical shape having a diameter corresponding to the largest diameter of the coupling groove 331 of the anchor housing member 330.

A male screw thread 332 is formed in the engaging groove 331 of the anchor housing member 330 and an outer male screw thread 332 is screwed on the outer periphery of the anchor bolt member 340, So that the anchor bolt member 340 can be coupled to the inside of the anchor housing member 330.

Meanwhile, a wrench groove 342 into which a wrench can be inserted is formed at one side of the anchor bolt housing 341. Therefore, when the anchor bolt member 340 is coupled to the anchor housing member 330 or when the clearance between the rack bar 210 and the pinion shaft 260 is increased, the wrench is engaged with the wrench groove 342, The elasticity of the spring 230 can be adjusted to adjust the yoke clearance.

The anchor housing member 330 is provided with an incision hole 334 for guiding the volume of the anchor housing member 330 to expand smoothly when the volume of the anchor housing member 330 is expanded by the engagement with the anchor bolt member 340, May be formed on the outer periphery of the anchor housing member 330. [

3, when the ankle bolt member 340 is coupled to the anchor housing member 330 as shown in FIG. 3, when the yoke clearance is adjusted using the yoke clearance adjusting device according to the embodiment of the present invention, A small clearance is present between the outer circumferential surface 333 of the anchor housing member 330 and the inner surface 251 of the cylindrical cylindrical inner space of the rack housing 250 so that the rack housing member 330 is positioned in the rack And can be slidably moved inside the housing 250.

After positioning the anchor housing member 330 to adjust the yoke clearance, the anchor bolt member 340 is coupled to the anchor housing member 330 so that the position of the anchor housing member 330 is fixed As the anchor housing member 330 is continuously engaged with the anchor bolt member 340 and the anchor housing member 330 as described above, the anchor housing member 330 has a shape characteristic of the coupling groove 331 The outer circumferential surface 333 of the anchor housing member 330 is in contact with the inner surface of the cylindrical cylindrical inner space of the rack housing 250 251) and can be fixed at a fixed position by a strong clamping force. When the clamping force is increased, It is to be able to be possible to adjust the clearance yoke without applying caulking process and a locknut as in the prior art.

According to the yoke clearance adjusting apparatus of the present invention as described above, since the anchor bolt type is provided, the fastening force can be enhanced, so that the yoke clearance can be adjusted without applying the conventional caulking process and locknut. The productivity can be improved and the cost reduction effect can be obtained.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it will be understood by those of ordinary skill in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. It is to be understood that the invention may be variously modified and changed.

210: rack bar 220: support yoke
230: spring 250: rack housing
330: anchor housing member 331: engaging groove
332: female thread 334: incision hole
340: anchor bolt member 341: male thread type thread

Claims

A support yoke 220 located on the rear surface of the rack bar 210 and slidably installed in the rack housing 250 to apply pressure to the rack bar 210,
A spring 230 for applying an elastic force to the support yoke 220,
And a yoke plug which adjusts a pressure applied to the other side of the spring 230 so that an elastic force applied by the one side of the spring 230 to the support yoke 220 can be adjusted,
Wherein the yoke plug is of an anchor bolt type and is divided into two parts.

The method according to claim 1,
The yoke plug includes an anchor housing member 330 slidably installed inside the rack housing 250 and contacting the other side of the spring 230 to adjust the pressure applied to the other side of the spring 230, An anchor bolt member 330 coupled to the anchor housing member 330 to increase the volume of the anchor housing member 330 to fix the anchor housing member 330 at a predetermined position in the rack housing 250 340). &Lt; / RTI >

The method of claim 2,
The anchor housing member 330 is formed with an engagement groove 331 formed to be gradually smaller in diameter toward the inside thereof and the anchor bolt member 340 is inserted into the engagement groove 331 of the anchor housing member 330, And is formed in a cylindrical shape having a diameter corresponding to the diameter of the yoke.

The method of claim 4,
A female screw thread 332 is formed in an engaging groove 331 of the anchor housing member 330 and a male screw thread 341 screwed to the female screw thread 332 is formed on the outer circumference of the anchor bolt member 340. ) Is formed on the yoke (20).

The method according to any one of claims 2 to 4,
Wherein the anchor housing member (330) is provided with an incision hole (334) for guiding the volume of the anchor housing member (330) to expand smoothly when the volume thereof is expanded by engagement with the anchor bolt member (340) .