JPH07164069A - Production of split thrust bearing and thrust bearing device - Google Patents

Abstract

PURPOSE:To surely prevent erroneous assembling with a engaging claw without the lowing of a yield of plate stock. CONSTITUTION:The outer circumferential face of the other split thrust bearing 1 is overlapped on both ends of the round inner circumferential face of one of a split thrust bearing 1 adjoining each other, both ends of the round inner circumferential face of one of split thrust bearing is punched along the round outer circumferential face of the other split thrust bearing. An engaging claw 2 for prevention of erroneous assembling is formed so as to be inclined against the line Y connecting between the circumferential direction center part C of split thrust bearing and its center 0, the claw is formed in the center part having the largest excess part 11 of crescent shape.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a half thrust bearing and a thrust bearing device.

[0002]

2. Description of the Related Art A half-circle ring-shaped half thrust bearing having engaging claws protruding outward in the radial direction on its outer peripheral surface has been already known. FIG. 3 shows an example of such a half-split thrust bearing. In this half-circle ring-shaped half-split thrust bearing 21, the engaging claw 22 is offset from the central portion C in the circumferential direction by a predetermined distance L. The engaging claws 22 are formed so as to extend in parallel with the straight line Y connecting the central portion C and the center O of the half thrust bearing 21 (Japanese Patent Laid-Open No. 53-53115). -24040 publication). The engaging claws 22 formed in parallel with the straight line Y connecting the central portion C and the center O in the circumferential direction are the half thrust bearings 2.
Since it is formed to be inclined with respect to the radiation direction of 1,
When the front and back of the half thrust bearing 21 are reversed,
The inclination direction of the engaging claw 22 is reversed. Therefore, when the half thrust bearing 21 is installed in the housing with the front facing up, the engaging claw 22 can be smoothly engaged with the engaging portion 28 formed on the housing side in parallel with the straight line Y ( (State of FIG. 3), when the half thrust bearing 21 is set in the opposite direction, as shown in FIG.
Since the projecting direction of 2 and the forming direction of the engaging portion 28 do not coincide with each other, it is possible to prevent erroneous assembly of the half thrust bearing 21. Further, conventionally, an engaging portion is provided on the abutment surface of one of the first half-split thrust bearings and the abutment surface of the other second half-split thrust bearing, and the second half of the first half-split bearing in the normal direction There is also proposed a thrust bearing device in which the engaging portions are engaged with each other only when the half thrust bearing is oriented in the proper direction (Actually, Sho 61-
(Japanese Patent No. 191521)

[0003]

When manufacturing a half thrust bearing, usually, in order to improve the yield of the plate-shaped material, a large number of half circle ring shaped half thrust bearings are arranged in the same direction. Both ends are aligned and slightly overlapped with each other for punching. More specifically,
The circular outer peripheral surface of the other half thrust bearing is superposed on both ends of the circular inner peripheral surface of one half thrust bearing adjacent to each other, and both ends of the circular inner peripheral surface of the other half thrust bearing are overlapped. The other half thrust bearing is punched along the circular outer peripheral surface. In this case, since there is a crescent-shaped surplus portion 23 between the inner peripheral surface of the one half thrust bearing and the outer peripheral surface of the other half thrust bearing, which are adjacent to each other, the engaging claw 22 removes the surplus portion 22. As described above, when the two end portions of the adjacent half-split thrust bearings are slightly overlapped with each other for punching as described above, the crescent-shaped surplus portion 23 becomes small. When the offset amount L of the engaging claw is increased in order to reliably prevent erroneous assembly, the amount of protrusion is considerably small because the excess portion 23 is small and is crescent-shaped. When the protrusion amount of the engaging claw 22 is reduced in this way, as shown in FIG. 4, if the clearance δ in the width direction between the engaging claw 22 and the engaging portion 28 caused by a manufacturing error is large. However, there is a risk that the engaging claws 22 are obliquely engaged with the engaging portions 28, resulting in incorrect assembly. On the other hand, when the offset amount L is reduced, that is, the engaging claw 22 is divided into the half thrust bearing 21.
When it is formed close to the central portion C in the circumferential direction, the amount of protrusion of the engagement claw 22 can be increased, but when the half thrust bearing 21 is turned upside down, The protrusion direction of the engaging claw 22 becomes similar.
For example, when the engaging claws 22 are formed in the central portion C, the half thrust bearing 21 has the same shape on the front and back surfaces thereof, and therefore the engaging claws 22 are formed on the half thrust bearing 21.
Even if the amount of protrusion is increased by approaching the center portion C in the circumferential direction, it is difficult to prevent the half thrust bearing 21 from being erroneously assembled. As described above, the conventional half thrust bearing 21 has a certain limit in reliably preventing erroneous assembly. Then, the other half thrust bearing is oriented in the normal direction with respect to the half thrust bearing 21 in the regular direction, on the abutment surface of the half thrust bearing 21 and the abutment surface of the other half thrust bearing. Even if the engaging portion that engages only at the time is provided, if the half thrust bearing 21 having the engaging claw 22 is erroneously assembled, the other half thrust bearing is erroneously assembled. Become. In view of such circumstances, the present invention provides a method of manufacturing a half thrust bearing and a thrust bearing device that eliminates the risk of being incorporated into a housing in an incorrect state.

[0004]

[Means for Solving the Problems] That is, the first aspect of the present invention is such that, when a large number of half thrust bearings are aligned in the same direction on a plate-shaped material and are sequentially punched, the half thrust bearings adjacent to each other have a circular shape. The circular outer peripheral surface of the other half thrust bearing is superposed on both ends of the peripheral surface, and both ends of the circular inner peripheral surface of the other half thrust bearing are aligned along the circular outer peripheral surface of the other half thrust bearing. In a method of manufacturing a half thrust bearing that is punched, when punching the half thrust bearing, the circular outer peripheral surface of the other half thrust bearing is provided with the one half thrust bearing adjacent to each other. An engaging claw protruding into a crescent-shaped surplus portion formed between the circular inner peripheral surface and the circular outer peripheral surface of the other half bearing is formed, and the engaging claw is formed into the other half dividing part. Circumferential direction of thrust bearing There is provided a method of manufacturing a halved thrust bearing, characterized in that with respect to a straight line connecting the a center central portion was set to punching and formed obliquely. A second aspect of the invention is a semicircular ring-shaped first half thrust bearing, an engagement claw formed on the outer peripheral surface of the first half thrust bearing so as to project radially outward, and a semicircular ring shape. The second half thrust bearing is formed on the abutment surface of the first half thrust bearing and the abutment surface of the second half thrust bearing, and the second half thrust bearing is formed in the normal direction. An engaging portion that engages with each other only when the split thrust bearing is oriented in a regular direction, and engages the engaging claw of the first half thrust bearing with an engaging recess formed in the housing, In a thrust bearing device in which engaging portions at both ends of the both half thrust bearings are engaged with each other and assembled into a housing, the engaging claws protruding outward in the radial direction are provided in a first half thrust bearing. Circumferential center and middle And forming obliquely to the straight line connecting the door, the engagement recess portion of the housing there is provided a thrust bearing and wherein the formed obliquely in conformity with the engaging claws.

[0005]

According to the manufacturing method of the first aspect of the invention, the engaging claw is formed obliquely with respect to the straight line connecting the center and the center in the circumferential direction of the half thrust bearing. It is possible to utilize the largest portion of the surplus portion of, and therefore, the protrusion amount of the engaging claw can be maximized. Moreover, if the engaging claws are formed in such a direction,
When the front and back surfaces of the half-split thrust bearing are reversed, the inclination directions of the engaging claws can be made to differ greatly, so that incorrect assembly can be reliably prevented. Further, according to the thrust bearing device of the second aspect of the present invention, the engaging claws provided on the first half-split thrust bearing can reliably prevent erroneous assembly of the first half-split thrust bearing, and moreover, the first half-split. Only when the second half thrust bearing is oriented in the normal direction with respect to the normally assembled first half thrust bearing by the engaging portion provided in the thrust bearing and the second half thrust bearing, Since the engaging portions engage with each other, the second half thrust bearing can also be assembled only in the proper direction.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the illustrated embodiments. In FIG. 1, a semicircular ring-shaped first half thrust bearing 1 having a point O as a center has a substantially central portion in the circumferential direction at its outer peripheral portion. The position is provided with an engaging claw 2 as an erroneous assembly preventing means. The engaging claw 2 is projected outward in the radial direction of the first half thrust bearing 1, and the circumference of the half thrust bearing 1 is provided. It is formed obliquely to the right with respect to the straight line Y connecting the central portion C and the center O in the direction. Both ends of the first half-split thrust bearing 1 are butted against both ends of the second half-split thrust bearing 3 having a semi-circular ring shape to form a complete ring. On the outer peripheral portion of one end portion of the first half thrust bearing 1, a protruding portion 4 protruding in the circumferential direction from a straight line X passing through the center O is formed, and the other protruding portion 4 is abutted against the protruding portion 4. The protruding portion 4 is provided on the outer peripheral portion of the end portion of the second half thrust bearing 3.
The notch 5 is formed so as to match the protruding shape of. At this time, the abutting surface of the protrusion 4 and the notch 5 is formed so as to cross the straight line X obliquely. Also, the first
A notch 6 that is recessed from the straight line X passing through the center O is formed in the outer peripheral portion of the other end portion of the half thrust bearing 1, and an outer peripheral portion of the other end portion of the second half thrust bearing 3 is formed. In accordance with the shape of the cutout portion 6, a projecting portion 7 projecting in the circumferential direction from the straight line X is formed. The abutting surface between the cutout portion 6 and the protruding portion 7 is formed so as not to cross the straight line X, unlike the abutting surface between the protruding portion 4 and the notch portion 5 described above. one,
Even if two identical second half thrust bearings 3 are to be combined, they cannot be assembled together. Further, the set of half thrust bearings 1 and 3 is incorporated in a housing (not shown), and in the housing, as shown by an imaginary line, the engaging claws 2 are inclined in the circumferential direction. Groove-shaped inclined engaging recesses 8 are formed so as to coincide with each other. Therefore, when the front and back surfaces are reversed when the first half thrust bearing 1 is assembled into the housing, the inclination direction of the engaging claw 2 is opposite to the inclination direction of the inclined engaging recessed portion 8 formed in the housing. As a result, the first half thrust bearing 1 can always be assembled in a proper state in the housing. Then, when assembling the other second half thrust bearing 3 to the first half thrust bearing 1 assembled to the housing, the front and back surfaces of the second half thrust bearing 3 are reversed. In this case, the relative positions of the notch portion 5 and the protrusion portion 7 assembled to the protrusion portion 4 and the notch portion 6 at both ends of the first half thrust bearing 1 are opposite to each other, so that the assembling becomes impossible. As a result, with respect to the first half-split thrust bearing 1 that is properly assembled in the housing, the other second half-split thrust bearing 3 cannot be assembled unless it is in a proper state. The thrust bearings 1 and 3 can always be assembled in a regular state. FIG. 2 shows a part of a manufacturing process of the first half thrust bearing 1, wherein a large number of first half thrust bearings 1 are aligned in the same direction in order to improve the yield of the plate-shaped material 10. In addition, both ends are slightly overlapped with each other, and both ends of the circular inner peripheral surface of the first first half thrust bearing 1 are punched along the circular outer peripheral surface of the other first half thrust bearing 1. I have to. At this time, a crescent-shaped surplus portion 11 is formed between the inner peripheral surface of the adjacent first half-split bearing 1 and the outer peripheral surface of the other first half-splash bearing 1. Engaging pawl 2 formed on the first half thrust bearing 1
Is formed obliquely to the right with respect to the straight line Y connecting the central portion C and the center O in the circumferential direction of the half thrust bearing 1. Therefore, the engaging claw 2 is formed at a substantially central position in the circumferential direction of the first half thrust bearing 1, so that the engaging claw 2 can be formed in the largest portion of the crescent-shaped surplus portion 11. , Therefore the engaging pawl 2
It is possible to increase the amount of protrusion and eliminate the possibility of incorrect assembly.

[0007]

As described above, according to the present invention, when punching a half thrust bearing from a plate-shaped material, one half thrust thrust bearing adjacent to each other is provided on both ends of the circular inner peripheral surface with the other half thrust thrust bearing. The circular outer peripheral surfaces of the half thrust bearings are overlapped, and both ends of the circular inner peripheral surface of the one half thrust bearing are punched along the circular outer peripheral surface of the other half thrust bearing, and the engagement is made. Since the pawl is formed obliquely with respect to the straight line connecting the center and the center in the circumferential direction of the half thrust bearing, it can be formed in the largest portion of the crescent-shaped surplus portion, and thus the plate-shaped material It is possible to reliably prevent erroneous assembly without lowering the yield. Furthermore, if the first half thrust bearing can be assembled in the housing in a proper state, the first half thrust bearing can be properly formed by the engaging portion provided on the abutment surface of each half thrust bearing. Since the second half-split thrust bearing can be assembled only in this state, the first half-split thrust bearing and the second half-split thrust bearing can be assembled in the housing only in the proper state. Therefore, this has the effect of reliably preventing erroneous assembly of both half thrust bearings.

[Brief description of drawings]

FIG. 1 is a plan view showing an embodiment of the present invention.

2 is a plan view showing a manufacturing process of the first half thrust bearing 1 shown in FIG. 1. FIG.

FIG. 3 is a plan view showing an example of a conventional device.

FIG. 4 is a plan view showing a state different from FIG.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... 1st half split thrust bearing 2 ... Engagement claw (mis-assembly prevention means) 3 ... 2nd half split thrust bearing 4, 7 ... Projection part (engagement part) 5, 6 ... Notch part (engagement part) 8 ... Engagement recess

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI technical display area F16C 35/02 Z

Claims (2)

[Claims] 1. When a plurality of half-split thrust bearings are aligned in the same direction on a plate-shaped material and are sequentially punched, one half-split thrust bearing adjacent to each other is provided on both ends of the circular inner peripheral surface of the other half-split thrust bearing. In the half thrust bearing, the circular outer circumferential surfaces of the split thrust bearings are overlapped, and both ends of the circular inner circumferential surface of the one half thrust bearing are punched along the circular outer circumferential surface of the other half thrust bearing. In the manufacturing method, when punching out the half thrust bearing, the circular inner peripheral surface of the other half thrust bearing and the half inner thrust surface of the other half thrust bearing adjacent to each other are formed on the circular outer circumferential surface of the other half thrust bearing. An engaging claw protruding into a crescent-shaped surplus portion formed between the circular outer peripheral surface of the bearing is formed, and the engaging claw is centered on the central portion in the circumferential direction of the other half thrust bearing. Oblique to the line connecting Method for producing a halved thrust bearing, wherein the thing formed to punched manner. 2. A semicircular ring-shaped first half-split thrust bearing, engagement claws formed on the outer peripheral surface of the first semi-split thrust bearing so as to project radially outward, and a semicircular ring-shaped first The second half split thrust bearing is formed on the butting surface of the first half split thrust bearing and the butting surface of the second half split thrust bearing. An engaging portion that engages with each other only when the thrust bearing is oriented in a normal direction, and engages the engaging claw of the first half-split thrust bearing with an engaging recess formed in the housing; In a thrust bearing device in which engaging portions at both ends of both half-split thrust bearings are engaged with each other so as to be incorporated in a housing, the engaging claws protruding outward in the radial direction are provided in the first half-split thrust bearing. Circumferential center and center And forming obliquely with respect to a straight line connecting the thrust bearing device, characterized in that the engagement recess portion of the housing is formed obliquely in conformity with the engaging claws.