KR20090036679A

KR20090036679A - Oilless rod ends bearing

Info

Publication number: KR20090036679A
Application number: KR1020070101840A
Authority: KR
Inventors: 박동주
Original assignee: 잘만정공 주식회사
Priority date: 2007-10-10
Filing date: 2007-10-10
Publication date: 2009-04-15

Abstract

The present invention is to provide a rod end bearing with improved quality and long life. In the conventional rod end bearing, vibration and load due to oscillation are almost concentrated at the top center top dead center of the spherical inner ring and the housing head. The center portion of the non-lubricating lubricating member wears very sharply and splits on both sides, so that the spherical inner ring and the head of the housing come into direct contact with each other, resulting in severe noise and lubrication.

Accordingly, the present invention includes a housing 110 formed by penetrating the inner ring seating portion 114 horizontally on the inner surface of the head 111; Spherical inner ring 130; Oil-free lubrication member (120); when configuring the rod end bearing with the outer circumferential surface of the head 111 is formed in a curved shape gradually thinner toward both ends 113 starting from the center portion 112 of the thickest head As the inner ring seating portion 114 of the 111 is bent along the curved surface of the spherical inner ring 130 to be in close contact with the spherical inner ring 130 together with the non-lubricating lubrication member 120, the present invention is a severe rocking motion and Even if a load is applied, the inner ring seating portion, the lubricating sheet, and the spherical inner ring are distributed evenly so that there is no phenomenon that one part of the lubricating sheet is rapidly worn as in the prior art, so that there is no fear of noise and the life is extended and quality can be improved.

Description

Oil-free rod ends bearing

The present invention is to provide a rod end bearing with improved quality and long life, and more specifically, an inner ring (hereinafter referred to as a 'spherical inner ring') having a spherical curved surface is formed on an inner ring seating portion formed in the head of the housing. The present invention relates to an oil-free rod end bearing that allows the inner ring seat portion and the spherical inner ring of the housing to be evenly contacted with each other, thereby exhibiting excellent performance even in severe rocking motion and significantly extending the life of the bearing.

In general, the rod end bearing refers to a bearing installed at the rod end of the linkage, and is mainly used to install a control rod linkage that transmits power smoothly to any difficult motion under traction and compression loads.

More specifically, the rod end bearings simultaneously load radial and thrust loads and exhibit excellent performance in rotational and rocking motions. And it is used in the rotary motion of the control mechanism or the various link parts in other dedicated machines.

Most of these rod end bearings include a housing formed by passing an inner ring seating portion through a head; A spherical inner ring (ball) fitted to the inner ring seating portion of the housing; A lubricating member for smoothly rotating while preventing the spherical inner ring from being separated from the head of the housing; It consists of.

The rod end bearings are divided into lubrication type and lubrication type. Among these, the oil supply type is the type that periodically lubricates the lubrication member according to the surrounding environment such as sliding, speed, or load. B. Appropriate to the mechanism, the oil-free type is characterized by being able to be used semi-permanently even if there is no periodic oiling by installing the material of the lubricating member as a special oil-free material.

Figure 1a is a cross-sectional view of the housing lubricating member and the spherical inner ring separated from the housing constituting the conventional rod end bearing, Figure 1b is a cross-sectional view showing only the state of fitting the housing, the lubricant-free lubricating member and the spherical inner ring in Figure 1a, FIG. 2 is a cross-sectional view of a state in which both edges of the head of the housing are pinched in FIG. 1B, and FIGS. 3A to 3B are enlarged views of parts of FIG. 2 to show a state before and a wear of the lubricating member.

In the conventional rod end bearing illustrated in FIG. 1A, when the head 11 of the housing 10 is configured as shown in FIG. 1A, a thick reinforcement 12 protrudes from the center outer surface to prevent deformation of the head 11. The end portions 13 on both sides are formed to have a thin thickness so that the center reinforcement 12 and both ends 13 are stepped together, and the inner inner ring seating portion 14 has a straight horizontal surface. This is a state.

And when the oil-free lubrication member 20 is fitted to the inner ring seat 14, as shown in Figure 1b, the oil-free lubrication member 20 is glued to one side to maintain a state of being in close contact with the horizontal plane of the inner ring seat 14 If the spherical inner ring 30 is inserted in the state, the spherical inner ring 30 is kept in line contact with the non-lubricating lubricating member 20 in which only the central portion thereof is horizontal.

In this state, when both ends 13 of the head are retracted with a mold as shown in FIG. 2, the center portion of the head 11 is not easily deformed by the reinforcement 12 and remains horizontal, so no matter how much it is wrapped around the sphere Even if it is trying to maintain the state that the line inner circumferential surface and the spherical inner ring 30 with the reinforcement 12 is in line contact.

When both ends 13 of the head 11 are retracted, both ends of the oil-free lubricating member 20 on the inner side thereof are also obliquely squeezed along the end 13 to be in close contact with the spherical inner ring 30. Since the central part with the reinforcement bar 12 maintains the horizontal state as it is, the lubrication-free lubricant member 20 is not evenly adhered to the whole along the spherical surface of the spherical inner ring 30, and the center part is horizontal as shown in the enlarged view of FIG. Significantly spaced spaces 40 are formed between the two inclined ends.

Therefore, such a conventional rod-end bearing is concentrated in the center top dead center of the spherical inner ring 30 and the head 11 in which the vibration and the load due to the rotation and rocking motion are in contact with each other, so the oil-free lubrication member 20 is When the central portion wears very sharply and becomes thin, and eventually the central portion of the lubrication-free lubricating member 20 splits to both sides, the spherical inner ring 30 and the head 11 of the housing 10 come into direct contact with each other. Occurs.

When both ends 13 of the head 11 are retracted, both ends 13 of the head 11 protrude more than the lubrication-free lubrication member 20, and thus directly contact the spherical inner ring 30.

As such, when the spherical inner ring 30 and the head 11 are in direct contact with each other, they rapidly inhibit severe noise generation and lubrication, and the lubrication-free lubricating member 20 slips on the inner ring seat 14 during extreme rotation and rocking motions. The life of the rod end bearing is shortened as it is often pulled out and released to the outside, which causes frequent maintenance and causes a production disruption and a cost increase.

The present invention was developed in view of the above-described conventional problems, and an object of the present invention is that any part of the non-lubricating lubricating member installed between the inner ring seating portion and the spherical inner ring of the housing 10 is rapidly subjected to severe rotational motion and rocking motion. It is to provide a lubrication-free rod end bearing that has excellent performance and prolongs its life and prevents abrasion.

Another object of the present invention is to provide an oil-free rod end bearing with low noise even when used for a long time because the lubricating sheet is not easily worn or detached from only one portion of the inner ring seating portion.

The present invention to achieve the above object is a housing through which the inner ring mounting portion horizontally through the head; A spherical inner ring fitted to the inner ring seating portion; One side is adhered to the inner ring seating portion, and the oil-free lubrication member is installed between the inner ring seating portion and the spherical inner ring; and comprises an oil-free rod end bearing, but the outer peripheral surface of the head from the thickest center to both ends Forming a gradually thinner curved shape, the inner ring seating portion in the horizontal state is curved along the curved surface of the spherical inner ring together with the non-lubricating lubricating member, characterized in that it is configured to be in close contact with the entire spherical inner ring.

Another object of the present invention is to form a locking jaw shallower than the thickness of the non-lubricating lubricating member on both ends of the inner ring seating portion of the head so that the gap between the locking jaw and the spherical inner ring at a predetermined interval (h) apart from the Departure is prevented by the locking jaw, the locking jaw is not in direct contact with the spherical inner ring, so there is no fear of noise, the purpose can be ideally achieved.

In the present invention, the inner ring seating portion of the housing wraps around the spherical inner ring to both ends, and is curved along its curve to hold it like a reinforcement bar. Since the lubricating sheet and the spherical inner ring are distributed evenly, there is no phenomenon that one part of the lubricating sheet is rapidly worn as in the prior art, thereby extending the life and improving the quality.

In addition, the separation of the oil-free lubrication part is prevented by the locking jaw formed at both ends of the inner ring seating portion of the head, and the locking jaw and the spherical inner ring are not directly contacted by a predetermined interval so that there is no fear of noise. There is also an effect of extending the life due to the departure of the non-lubricated lubricating member, and the outer peripheral surface of the head has a round shape as a whole without a stepped portion in the center as in the prior art has an excellent appearance beauty.

Hereinafter, the preferred configuration and operation for achieving the object of the present invention will be described with reference to the accompanying drawings.

Figure 4 is a cross-sectional view for showing the structure of the rod end bearing according to the present invention, Figures 5a to 5c is the inner ring seat portion and the lubrication-free lubricating member in the state before closing both ends of the head of the housing in the rod end bearing of the present invention Fig. 6 is a cross-sectional view showing an enlarged portion of the rod end bearing of the present invention.

A housing 110 formed by penetrating a horizontal inner ring seating portion 114 through the head 111 of the configuration of the present invention; A spherical inner ring 130 fitted to the inner ring seating portion 114; One side is adhered to the inner ring seating portion 114 with an adhesive, the oil-free lubricating member 120 is installed between the inner ring seating portion 114 and the spherical inner ring 130; It can be said that it is the same as before.

The present invention is characterized in that when forming the outer periphery of the head 111 is formed in a curved shape gradually thinner toward both ends 113 from the thickest central portion 112.

Then, the oil-free lubricating member 120 and the spherical inner ring 130 are inserted into the inner ring seating part 114 of the head 111, and both ends 113 are retracted, and then both ends (the thickest center part 112) are started. As the head material is pressed evenly up to 113), the entire inner ring seat portion 114 of the inner surface is curved along the curved surface of the spherical inner ring 130.

Then, since the inner ring seating portion 114 is wrapped around the curved surface of both spherical inner ring 130 at both ends in the center portion, there is no phenomenon that the space 40 is formed between the spherical inner ring 130 as in the prior art. At this time, both ends play a role of supporting the fluctuations and loads applied to the spherical inner ring 130, such as reinforcing bar sufficiently.

That is, since the contact area between the spherical inner ring 130 and the non-lubricated lubrication member 120 is wide and constant, even if a severe rotational movement or rocking motion and a load are applied, the force is the entire lubrication-free lubricating member 120 and the spherical inner ring 130. Since it is evenly dispersed and acts on, the wear resistance is constant to extend the life, and there is no phenomenon that one part of the lubricating sheet is rapidly worn as in the prior art, thereby exhibiting the performance of the swing motion for a long time.

And the present invention when forming the rod end bearing as described above by forming a locking jaw 115 of the depth less than the thickness of the non-lubricating lubricating member 120 at both ends of the inner ring seating portion 114 of the head 111 spherical inner ring ( It is characterized in that the predetermined interval (h) is maintained between the engaging jaw 115 so that 130 is not in direct contact.

In the present invention, the oil-free lubricating member 120 may be detached even in the severe rocking motion as the oil-free lubricating member 120 is caught in the locking jaw 115 formed at both ends of the inner ring seat 114 of the head 111. At this time, both of the locking jaw 115 of the inner ring seating portion 114 has a predetermined interval with the spherical inner ring 130 is not in direct contact there is no fear of noise.

In addition, since the outer circumferential surface of the head forms a round curved surface as a whole, the appearance is superior to conventional products, thereby increasing purchasing power.

The lubrication-free lubricating member 120 is a variety of materials such as Teflon, PT, PT, METALOPLAST, etc. can be used in accordance with the defense standards or established standards of each country.

Figure 1a is a cross-sectional view of the housing constituting the conventional rod end bearing, the oil-free lubricating member and the spherical inner ring disassembled

Figure 1b is a cross-sectional view of a conventional oil-free lubricating member and the spherical inner ring in the head of the housing;

Figure 2 is a cross-sectional view of a state in which both edges of the head of the conventional housing is pinched;

3A and 3B are cross-sectional views showing a state before and a worn state of the lubricating member by expanding a portion of FIG. 2.

Figure 4 is a cross-sectional view for showing the structure of the rod end bearing the present invention is implemented

Figures 5a to 5c is a cross-sectional view showing a process of being in close contact with the spherical inner ring as a whole by gradually closing from the state before closing both ends of the head of the housing in the present invention

Figure 6 is an enlarged cross-sectional view of a portion of the rod end bearing of the present invention

Explanation of symbols for main parts of the drawings

110 housing 111 head

112: central portion 113: end

114: inner ring seating portion 115: locking jaw

120: oil-free lubricating member 130: spherical inner ring

Claims

A housing 110 formed by penetrating an inner ring seating portion 114 horizontally to an inner surface of the head 111; A spherical inner ring 130 fitted to the inner ring seating portion 114; One side is attached to the inner ring seating portion 114 and is in close contact, the oil-free lubricating member 120 is installed between the inner ring seating portion 114 and the spherical inner ring 130;

The outer circumferential surface of the head 111 of the housing 110 gradually becomes thinner while forming a curved shape from the thickest central portion 112 to both ends 113.

Oil-free rod end bearing, characterized in that by closing both ends 113 the inner ring seat portion 114 of the head 111 is in close contact with the curved surface of the spherical inner ring 130 together with the non-lubricating lubrication member 120.

The method of claim 1,

At both ends of the inner ring seating portion 114 of the head 111, a locking jaw 115 having a depth smaller than the thickness of the oil-free lubricating member 120 is formed,

Oil-free rod end bearing, characterized in that the space between the spherical inner ring 130 and the locking step 115 is spaced at a predetermined interval (h).