JP2016090029A - Assembly jig and assembly method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an assembly jig and an assembly method capable of suppressing occurrence of a scratch of a rolling body.SOLUTION: An assembly jig 20 keeps the interval between first and second annular bodies 3, 5 constant, in order to assemble a pin type holder including the first annular body 3, the second annular body 5 and plural pins 9. The assembly jig 20 includes a first support part 21 supporting a portion on a side opposite to a rolling body 7 in an axial direction of the first annular body 3, and a second support part 23 supporting a portion on a side opposite to the rolling body 7 in an axial direction of the second annular body 5.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an assembly jig and an assembly method.

  Conventionally, as shown in FIG. 3, a plurality of rollers disposed between the first and second annular bodies 103, 105 and the first and second annular bodies 103, 105 spaced apart in the axial direction. There is known a pin type holder 101 having a plurality of pins 109 inserted into the hollow holes 107a of the moving body 107 and connecting the first and second annular bodies 103 and 105 at both ends (for example, a patent) Reference 1 and 2). Referring also to FIG. 4, a plurality of first and second through holes 103 a and 105 a are formed in the first and second annular bodies 103 and 105 at intervals in the circumferential direction. The number of each of the first and second through holes 103a and 105a is the same as the number of rolling elements 107. In addition, a female thread portion is formed in the second through hole 105a.

  When assembling such a pin type holder 101, first, the second annular body 105 is supported from below by the base 119. Next, the rolling element 107 and the first annular body 103 are arranged above the second annular body 105. At that time, a shim member 113 is interposed between the first annular body 103 and the rolling element 107. Then, as shown in FIG. 4, a smaller number of temporary fixing bolts 115 (six in the illustrated example) than the first and second through-holes 103a and 105a, the first and second through-holes 103a and 105a, and the hollow The holes 107a are inserted at equal intervals in the circumferential direction. Then, the rolling element 107 and the shim member 113 are temporarily clamped between the first and second annular bodies 103 and 105 by screwing the temporary fixing bolt 115 into the female thread portion of the second through hole 105a. At this time, the distance between the first and second annular bodies 103 and 105 is kept constant by the shim member 113.

  Next, the pins 109 are inserted into the first and second through holes 103a and 105a and the hollow hole 107a at positions where the temporary fixing bolts 115 are not disposed (12 positions in the illustrated example). Here, a male screw portion is formed at the second end portion 109b (the lower end portion in FIG. 3) of the pin 109 on the second through hole 105a side, and the outer diameter of the intermediate portion 109c of the pin 109 is a hollow hole. It is set smaller than the inner diameter of 107a. Then, the male screw portion of the second end portion 109b of the pin 109 is screwed and fixed to the female screw portion of the second through hole 105a. Subsequently, the first end portion 109a (the upper end portion in FIG. 3) on the first through hole 103a side of the pin 109 is fixed to the first through hole 103a by welding. The code | symbol 117 in FIG. 3 has shown the welding part of the 1st end part 109a and the 1st through-hole 103a.

  In the case where the rolling element 107 is a tapered roller as in the example shown in the figure, the assembled body is in a state where the first and second annular bodies 103 and 105, the rolling element 107, and the pin 109 are assembled. It cannot be incorporated into the inner ring 111 of the tapered roller bearing. Therefore, the temporary fixing bolt 115 and the pin 109 described above are inserted while the rolling element 107 is first assembled in the inner ring 111.

  Thereafter, the temporary fixing bolt 115 is removed, and the pin 109 is inserted into the first and second through holes 103a and 105a and the hollow hole 107a at the position where the temporary fixing bolt 115 is disposed (six locations in the illustrated example). Insert with equal orientation. Then, the male screw portion of the second end portion 109b of the pin 109 is screwed and fixed to the female screw portion of the second through hole 105a. Subsequently, the first end 109a of the pin 109 is fixed to the first through hole 103a by welding.

  Through the steps described above, all the rolling elements 107 are held by the pin type holder 101 so as to be freely rollable in a state where the distance between the first and second through holes 103a and 105a is kept constant.

JP 2013-7453 A JP 2006-90410 A

  However, in the assembling method as described above, since the shim member 113 is pressed by the rolling element 107 and the first annular body 103, the rolling element 107 is scratched when the shim member 113 is removed. However, there was a problem that the appearance was poor. In particular, when the rolling element 107 is subjected to a coating treatment, the appearance defect becomes remarkable. As a problem common to the pin type bearings with the surface treatment coating treatment, there is a high demand for appearance quality, which is particularly problematic. In the inventions of Patent Documents 1 and 2 that use shim members when assembling the cage, the same problem may occur.

  The present invention has been made in view of the above circumstances, and an object thereof is to provide an assembling jig and an assembling method capable of suppressing the occurrence of scratches on rolling elements.

The above object of the present invention can be achieved by the following constitution.
(1) a first annular body having a plurality of first through holes formed at intervals in the circumferential direction;
A second annular body that is arranged with an interval in the axial direction from the first annular body, and in which a plurality of second through holes are formed at an interval in the circumferential direction;
A plurality of pins respectively inserted into the hollow holes of the plurality of rolling elements disposed between the first and second annular bodies, and having both ends fixed to the first and second through holes;
An assembly jig for maintaining a constant distance between the first and second annular bodies in order to assemble a pin type cage comprising:
The assembly jig is
A first support portion for supporting a portion on the opposite side of the rolling element in the axial direction of the first annular body;
A second support portion for supporting a portion on the opposite side of the rolling element in the axial direction of the second annular body;
An assembly jig characterized by comprising:
(2) A screw hole is formed in a portion opposite to the rolling element in the axial direction of the first annular body,
A screw hole is formed in the first support part,
By fastening the screw hole of the first annular body and the screw hole of the first support portion with a screw member, the first annular body is suspended from the upper side in the gravitational direction by the first support portion,
The assembly jig according to (1), wherein the two annular bodies are supported on the second support portion from below in the direction of gravity.
(3) a first annular body having a plurality of first through holes formed at intervals in the circumferential direction;
A second annular body that is arranged with an interval in the axial direction from the first annular body, and in which a plurality of second through holes are formed at an interval in the circumferential direction;
A plurality of pins respectively inserted into the hollow holes of the plurality of rolling elements disposed between the first and second annular bodies, and having both ends fixed to the first and second through holes;
An assembly method for assembling a pin type cage with an assembly jig,
A step of supporting a portion opposite to the rolling element in the axial direction of the first annular body by the first support portion of the assembly jig;
A step of supporting a portion opposite to the rolling element in the axial direction of the second annular body by the second support portion of the assembly jig;
The pin is inserted into the first through hole, the hollow hole, and the second through hole in a state where the distance between the first and second annular bodies is maintained constant by the first and second support portions. And a process of
Fixing both ends of the pin to the first and second through holes;
An assembly method comprising the steps of:

  According to the assembling jig and the assembling method of the present invention, it is possible to assemble a pin type retainer in which the distance between the first and second annular bodies is kept constant. Further, in the prior art, when the shim member is removed, scratches are generated on the rolling elements. However, since the shim member is not used in the method of the present embodiment, it is possible to prevent the rolling elements from being scratched.

It is sectional drawing which shows the assembly jig and pin type holder | retainer concerning this embodiment. It is a top view which shows an assembly jig and a 1st annular body. It is sectional drawing which shows the shim member and pin type holder | retainer which concern on a prior art. It is a top view which shows the 1st annular body which concerns on a prior art.

  Hereinafter, an assembly jig and an assembly method according to embodiments of the present invention will be described with reference to the drawings.

  As shown in FIG. 1, the pin type holder 1 assembled using the assembly jig 20 according to the present embodiment includes first and second annular bodies 3, 5 that are spaced apart in the axial direction, A plurality of rollers that are inserted into the hollow holes 7a of a plurality of rolling elements (conical rollers) 7 disposed between the first and second annular bodies 3 and 5 and connect the first and second annular bodies 3 and 5 at both ends. The pin 9 is provided. Therefore, each of the plurality of rolling elements 7 is sandwiched between the first and second annular bodies 3 and 5 facing in the axial direction via the pin 9 so as to be freely rotatable. Reference numeral 11 denotes an inner ring that comes into contact with the rolling element 7 on the outer peripheral surface and is relatively rotatable with the rolling element 7.

  Both end surfaces in the axial direction of the first and second annular bodies 3 and 5 (upper and lower surfaces in FIG. 1) are tapered so as to match the shape of the rolling element 7 that is a tapered roller. Referring also to FIG. 2, the first and second annular bodies 3, 5 are formed with first and second through holes 3 a, 5 a having the same number as the number of rolling elements 7, spaced apart in the circumferential direction. Yes. The first and second through holes 3a and 5a extend substantially perpendicular to the axial end faces of the first and second annular bodies 3 and 5, and penetrate the first and second annular bodies 3 and 5 in the axial direction. . Here, the extending direction of the first and second through holes 3 a and 5 a is substantially parallel to the hollow hole 7 a of the rolling element 7. Therefore, the pin 9 can be inserted into the first and second through holes 3a and 5a and the hollow hole 7a.

  Here, a male screw portion is formed at the second end portion 9b (the lower end portion in FIG. 1) of the pin 9 on the second through hole 5a side, and a female screw portion is formed at the second through hole 5a. ing. Therefore, the pin 9 can be fixed to the second annular body 5 by screwing the male screw portion of the second end portion 9b with the female screw portion of the second through hole 5a. Further, since the outer diameter of the intermediate portion 9c of the pin 9 is set smaller than the inner diameter of the hollow hole 7a, the rolling element 7 is supported by the pin 9 so as to be relatively rotatable. Moreover, the 1st end part 9a (upper side end part in FIG. 1) by the side of the 1st through-hole 3a of the pin 9 can be fixed to the 1st through-hole 3a by welding. The code | symbol 17 in FIG. 1 has shown the welding part of the 1st end part 9a and the 1st through-hole 3a.

  The assembly jig 20 includes a first support portion 21 that supports a portion (an upper portion in FIG. 1) opposite to the rolling element 7 in the axial direction of the first annular body 3, and the axial direction of the second annular body 5. And a second support portion 23 that supports a portion on the opposite side of the rolling element 7 (a lower portion in FIG. 1). The radially outer ends of the first and second annular bodies 3 and 5 are connected by a connecting portion 25 extending in the axial direction.

  The first support portion 21 has a substantially rectangular cross section extending in the radial direction as a whole. The first support portion 21 includes a wide portion 26 positioned on the radially outer side, a narrow portion 27 that protrudes radially inward from the inner peripheral surface 26 a of the wide portion 26, and has a narrower axial width than the wide portion 26. Have. Here, the inner peripheral surface 26a of the wide portion 26 and the end surface 27a of the narrow portion 27 on the first annular body 3 side correspond to the first annular body 3 in terms of shape and dimensions. Positioning is possible with respect to the axial direction and the radial direction.

  The narrow portion 27 is formed with a screw hole 27b penetrating in the axial direction. In addition, in the portion of the first annular body 3 on the opposite side to the rolling element 7 in the axial direction (upper portion in FIG. 1), the portion in contact with the end surface 27 a of the narrow portion 27 is threaded in the axial direction. The hole 3b is recessed. The first annular body 3 is supported by the first support portion 21 by fastening the screw hole 3 b of the first annular body 3 and the screw hole 27 b of the narrow width portion 27 with the screw member 29. In the present embodiment, the axial direction and the gravitational direction are substantially parallel, and the first annular body 3 is suspended from the upper side in the gravitational direction by the first support portion 21. The method of supporting the first annular body 3 by the first support portion 21 is not limited to fastening by the screw member 29 as long as the first annular body 3 can be released, and any method can be applied. Good.

  The second support part 23 has a substantially rectangular cross section extending in the radial direction. Further, the end surface 23a on the second annular body 5 side of the second support portion 23 is in contact with a portion on the opposite side of the rolling element 7 in the axial direction of the second annular body 5 (lower part in FIG. 1). Support from below in the direction of gravity. The second support portion 23 has a guide 28 that extends in the axial direction and contacts the second annular body 5 in the radial direction. Since the dimensions of the guide 28 and the second annular body 5 correspond to each other, the second annular body 5 is also supported in the radial direction by the guide 28. For this reason, alignment of the 1st annular body 3 and the 2nd annular body 5 becomes easy.

  In the present embodiment, the axial direction and the gravitational direction are substantially parallel. However, the axial direction and the gravitational direction may intersect with each other at an angle. In that case, in order to ensure the support of the second annular body 5 by the second support portion 23, the second support portion 23 is connected to the second support portion 23 by a screw member or the like, similarly to the support of the first annular body 3 by the first support portion 21. The second annular body 5 may be fixed.

  A plurality of assembly jigs 20 may be used. In this case, the plurality of assembly jigs 20 are arranged at equal intervals in the circumferential direction, for example, and the screw members 29 and the screw holes 27b are also arranged at equal intervals in the circumferential direction.

  A method of assembling such a pin type cage 1 using the assembly jig 20 will be described below.

  First, the first annular body 3 is supported by the first support portion 21 and the screw member 29 of the assembly jig 20, and the second annular body 5 is supported by the second support portion 23. Thereby, the space | interval of the 1st and 2nd annular bodies 3 and 5 is maintained constant. Next, the pin 9 is inserted into the first through hole 3a, the hollow hole 7a, and the second through hole.

  When the rolling element 7 is a tapered roller as in the illustrated example, when the first and second annular bodies 3, 5, the rolling element 7, and the pin 9 are assembled, the assembly is a tapered roller. It cannot be incorporated in the inner ring 11 of the bearing. Therefore, the above-described pin 9 is inserted while the rolling element 7 is first assembled in the inner ring 11.

  Subsequently, the male screw portion of the second end portion 9b of the pin 9 is screwed and fixed to the female screw portion of the second through hole 5a. Then, the 1st end part 9a of the pin 9 is fixed to the 1st through-hole 3a by welding (refer the welding part 17 in FIG. 1). After the first end portions 9a of all the pins 9 are welded, the screw member 29 is removed from the first annular body 3, and the assembly jig 20 is removed from the first and second annular bodies 3 and 5.

  Thus, by using the assembly jig 20, it is possible to assemble the pin type holder 1 in which the distance between the first and second annular bodies 3 and 5 is kept constant. In the prior art, when the shim member is removed, the rolling element 7 is scratched. However, since the shim member is not used in the method of the present embodiment, it is possible to prevent the rolling element 7 from being scratched.

  In addition, this invention is not limited to embodiment mentioned above, A change, improvement, etc. are possible suitably.

  For example, in the above-described embodiment, the assembling jig 20 and the assembling method for assembling the pin type cage for the tapered roller bearing in which the rolling element 7 is a tapered roller are shown. However, the assembling jig 20 and the assembling method of the present invention are shown. Can be applied to any type of pin type cage, for example, can be applied to a pin type cage of a cylindrical roller bearing or a self-aligning roller bearing.

DESCRIPTION OF SYMBOLS 1 Pin type holder 3 1st annular body 3a 1st through-hole 3b Screw hole 5 2nd annular body 5a 2nd through-hole 7 Rolling body 7a Hollow hole 9 Pin 9a 1st end part 9b 2nd end part 9c Intermediate part 11 Inner ring 17 Welded portion 20 Assembly jig 21 First support portion 23 Second support portion 23a End surface 25 Connection portion 26 Wide portion 26a Inner circumferential surface 27 Narrow portion 27a End surface 27b Screw hole 28 Guide 29 Screw member

Claims (3)

A first annular body having a plurality of first through holes formed at intervals in the circumferential direction;
A second annular body that is arranged with an interval in the axial direction from the first annular body, and in which a plurality of second through holes are formed at an interval in the circumferential direction;
A plurality of pins respectively inserted into the hollow holes of the plurality of rolling elements disposed between the first and second annular bodies, and having both ends fixed to the first and second through holes;
An assembly jig for maintaining a constant distance between the first and second annular bodies in order to assemble a pin type cage comprising:
The assembly jig is
A first support portion for supporting a portion on the opposite side of the rolling element in the axial direction of the first annular body;
A second support portion for supporting a portion on the opposite side of the rolling element in the axial direction of the second annular body;
An assembly jig characterized by comprising: A screw hole is formed in a portion opposite to the rolling element in the axial direction of the first annular body,
A screw hole is formed in the first support part,
By fastening the screw hole of the first annular body and the screw hole of the first support portion with a screw member, the first annular body is suspended from the upper side in the gravitational direction by the first support portion,
The assembly jig according to claim 1, wherein the two annular bodies are supported by the second support portion from below in the direction of gravity. A first annular body having a plurality of first through holes formed at intervals in the circumferential direction;
A second annular body that is arranged with an interval in the axial direction from the first annular body, and in which a plurality of second through holes are formed at an interval in the circumferential direction;
A plurality of pins respectively inserted into the hollow holes of the plurality of rolling elements disposed between the first and second annular bodies, and having both ends fixed to the first and second through holes;
An assembly method for assembling a pin type cage with an assembly jig,
A step of supporting a portion opposite to the rolling element in the axial direction of the first annular body by the first support portion of the assembly jig;
A step of supporting a portion opposite to the rolling element in the axial direction of the second annular body by the second support portion of the assembly jig;
The pin is inserted into the first through hole, the hollow hole, and the second through hole in a state where the distance between the first and second annular bodies is maintained constant by the first and second support portions. And a process of
Fixing both ends of the pin to the first and second through holes;
An assembly method comprising the steps of:

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