Needle roller cage and method of manufacturing the needle roller cage

专利摘要:
PURPOSE: A needle roller cage and a method for manufacturing the same are provided to increase the endurance and the lubrication by minimizing the contacting surface of the needle roller. CONSTITUTION: A method for manufacturing needle roller cage includes the steps of forming protrusion parts at both of an outer peripheral surface and an inner peripheral surface when manufacturing a ring shape main body of a case(100), forming a plurality of chamber holes(140) in the main body of the cage by pressing wherein the gap(L2) of the protrusion parts is equal to a caliber(R2) of the needle roller and the width of the other part(X2) is larger than the caliber of the needle roller, forming a locking part by rolling the inner protrusion part and the outer protrusion of the main body of the cage, and compulsorily inserting the needle roller in the respective chamber holes.
公开号:KR20000063753A
申请号:KR1020000044766
申请日:2000-08-02
公开日:2000-11-06
发明作者:박동주
申请人:박동주；잘만정공 주식회사；
IPC主号:

专利说明:

Needle roller cage and method of manufacturing the needle roller cage
The present invention relates to a needle roller cage and a method of manufacturing the same, in particular, the assembly state is good by preventing the needle roller from being easily separated from the chamber hole of the cage, the needle roller is minimized by contacting the inner peripheral wall of the chamber hole needle The present invention relates to a needle roller cage and a method of manufacturing the same, which can extend the life by improving the durability of the needle roller while reducing the generation of frictional heat of the roller.
In general, the cage body of the needle roller bearing is in the form of a circular ring, the conventional cage body 10 is formed on the outer circumferential surface on which the outer ring is assembled, as shown in Figure 2 to form a protrusion 11 for forming a locking portion on both sides, both sides The flange 13 is made of a structure formed.
The conventional cage body 10 thus made is the same as the state (a) of FIG. 3 in plan view, and in this state, the needle roller 20 can be assembled by being fitted at predetermined intervals within the range of both flanges 13. The chamber hole 14 is continuously formed by pressing, and the locking parts 11a and 12a are made of the notches 12 of the protrusion 11 and the inner circumferential surface, and then the needle roller 20 is assembled by a force fitting method. It is configured to.
However, conventionally, when forming the chamber hole 14, as shown in (b) of FIG. 3, the distance L1 between the two protrusions 11 and the width X1 of the chamber hole 14 itself are equal to each other in a straight line. In this case, when the width (X1) of the chamber hole 14 is formed to be significantly wider than the diameter (R1) of the needle roller 20 for smooth rotation of the needle roller 20, the interval between the protrusions 11 (L1) is too far to roll the protrusion 11 of the outer circumferential surface by a predetermined length (α) to form the locking portion (11a) and to form the notched groove 12 on the inner circumferential surface, such as rolling must be repeated several times There is a problem that it is quite difficult to form the portions 11a and 12a.
When the width X1 of the chamber hole 14 is equal to the diameter R1 of the needle roller 20, the needle roller 20 is tightly formed to a size such that the needle roller 20 is barely fitted. In addition to the contact portion T1 between the needle roller 20 assembled in the chamber hole 14 and the upper and lower locking portions 11a and 12a, the contact portion T2 with the inner circumferential surface of the chamber hole 14 is also generated. Since there are many parts, the rotational force is weakened, excessive frictional heat is generated, and wear is easy, and as a result, the maintenance cost is significantly increased.
The present invention is to solve the conventional problems as described above, the object of the present invention is to reduce the wear rate of the needle roller to the maximum by reducing the area of the inner surface of the needle roller cage and the needle roller as possible to extend the life and improve the lubricity The present invention provides a needle roller cage and a method for manufacturing the needle roller cage in which the locking of the cage and the needle roller can be made good.
1 is a perspective view showing a needle roller cage produced by a conventional manufacturing method
2 is a partial cross-sectional view cut to show a conventional cage body structure.
Figure 3 is a process diagram showing a process of making a conventional needle roller cage
Figure 4 is an enlarged cross-sectional view showing a state in which the needle roller is assembled in the conventional cage
5 is a perspective view illustrating a cage body according to the present invention;
6 is a partial cross-sectional view illustrating the cage body structure of the present invention.
7 is a process chart of the process of making the needle roller cage by the present invention
8 is an enlarged cross-sectional view showing a state in which the needle roller is assembled in the cage of the present invention;
9 is a perspective view showing a needle roller cage produced according to the present invention;
Brief description of the main parts of the drawings
100: cage body 110, 120: protrusion
111,112: locking section 140: chamber ball
200: Needle Roller R2: Caliber
L2: Spacing X2: Width
Hereinafter, a method of manufacturing a needle roller cage capable of effectively achieving the object of the present invention, and a technical configuration and operation thereof will be described in detail by process according to the accompanying drawings as preferred embodiments.
First step (cage body forming process)
Figure 3 illustrates a cage body for making the needle roller cage of the present invention, Figure 4 is a side cross-sectional view of the needle roller cage body of the present invention, as shown in the present invention is first ring-shaped cage body ( When forming 100, both the outer circumferential surface and the inner circumferential surface are formed to be provided with both protrusions 110 and 120, and such a cage main body is seen in plan view as shown in FIG.
2nd process (chamber hole pressing process)
In the cage body 100 formed by the first process, the chamber hole 140 is repeatedly formed by pressing repeatedly at a predetermined interval. In this case, the interval between the protrusions 110 and 120 as shown in FIG. L2 is approximately equal to the diameter R2 of the needle roller 200, and the width X2 of the chamber hole 140 itself is larger than the diameter R2 of the needle roller 200.
3rd process (inside / outside protrusion rolling process)
When the inner and outer protrusions 110 and 120 formed on the inner and outer circumferential surfaces of the cage main body 100 are simultaneously rolled after the second process is performed, the inner and outer protrusions 110 and 120 as shown in FIG. Since the rolled portion of the) further enters the chamber hole 140 to form the locking portions 111 and 121, the interval L2 between the protrusions 110 and 120 may be the diameter of the needle roller 200. It becomes a state smaller than (R2).
4th process (needle roller assembly process)
In the state where the third process is performed, the needle roller 200 is forcibly inserted into the chamber holes 140 of the cage main body 100. Then, the needle roller 200 is inside / outside the chamber holes 140. Since the protrusions 110 and 120 are forcibly inserted between the locking parts 111 and 121 formed by rolling, the protrusions 110 and 120 are caught by the upper and lower locking parts 111 and 121 so that they do not fall out. It is maintained.
The needle roller 200 assembled in the cage of the present invention produced by such a process may be in contact only with the locking portions 111 and 121 formed by rolling the protrusions 110 and 120 in the chamber hole 140. Since only the remaining inner circumferential wall portion of the chamber hole 140 is not in contact at all, the area in which the needle roller 200 is in contact can be reduced as much as possible.
As described above, the present invention has a remarkable effect of increasing durability and lubricity of the needle roller cage by extending the life of the needle roller cage while minimizing the area where the inner circumferential wall of the cage and the roller contact each other. It is easy to assemble the inner ring or outer ring of the bearing, which is the final process, and the needle roller cage is used to make the bearing for a long time by replacing only the cage in which the needle roller is assembled.

权利要求:
Claims (2)
[1" claim-type="Currently amended] In constructing the ring-shaped needle roller cage,
A plurality of chamber holes 140 are formed at a predetermined interval in the cage body 100 having the protrusions 110 and 120 formed on the inner and outer circumferential surfaces thereof, but the distance L2 between the protrusion 110 and the protrusion 120 is the needle roller. Almost the same as the aperture (R2) of 200, the width (X2) of the chamber hole 140 itself is formed larger than the aperture (R2) of the needle roller (200), such inner and outer protrusions 110, 120 Needle roller cage, characterized in that the contact of the needle roller 200 is made only in the locking portion (111) (121) formed by rolling.
[2" claim-type="Currently amended] Cage body forming process (first process) to form the projection body 110 and 120 are provided on both the outer peripheral surface and the inner peripheral surface when making the ring-shaped cage body 100 and
Forming a plurality of chamber holes 140 in the cage body 100 by the above process by pressing, but the spacing (L2) between the protrusions 110, 120 is equal to the diameter (R2) of the needle roller 200, A chamber hole pressing step (second step) of forming the width X2 of the remaining portion larger than that;
A rolling step (third step) of rolling the inner and outer protrusions 110 and 120 of the cage main body 100 in which the chamber holes 140 are formed to form the locking parts 111 and 121;
Needle roller cage manufacturing method characterized in that it consists of a needle roller assembly step (fourth step) forcibly inserting the needle roller (200) in each chamber hole 140 of the cage body 100 through the above process.

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同族专利:

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公开号 | 公开日

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引用文献:

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公开号 | 申请日 | 公开日 | 申请人 | 专利标题

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法律状态:
2000-08-02|Application filed by 박동주, 잘만정공 주식회사

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2000-08-02|Priority to KR1020000044766A

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2000-08-02|Priority claimed from KR1020000044766A

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2000-11-06|Publication of KR20000063753A

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2002-06-15|Application granted

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2002-06-15|Publication of KR100340847B1

优先权:

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申请号 | 申请日 | 专利标题

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KR1020000044766A|KR100340847B1|2000-08-02|method of manufacturing the needle roller cage|