JP2003165034A - Circlip diameter expanding device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To compose a pawl 68 by a first pawl 88 facing an opening 87 of a circlip 15 and a second pawl 89 reciprocating relatively with respect to the first pawl 88 in a circlip diameter expanding device 18. <P>SOLUTION: By setting a value for reciprocation when opening the first pawl and the second pawl, a plurality of circlips with different sizes can be evenly expanded respectively. Consequently, the plurality of circlips with different sizes can be handled, versatility can be enhanced, and facility costs can be reduced. When the first pawl and the second pawl are respectively opened, the opening of the circlip is pressed outward by the first pawl and an inner diameter is enlarged, a lateral side in a position of 90° from the opening is also pressed outward and the inner diameter is enlarged. Consequently, the circlip can be evenly expanded. <P>COPYRIGHT: (C)2003,JPO

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a circlip diameter expanding device used for mounting a circlip. [0002] The present applicant has previously filed Japanese Patent Application No. 2001-254.
23 "Method and device for attaching circlip to bearing housing and bearing". An outline of this technique will be described with reference to FIGS. FIG. 7 is a view of FIG. 2 of the previously proposed circlip mounting device, wherein the circlip mounting device is a jig guide tube that is erected on a base 10 (the reference numeral used in FIG. 2 is diverted). 11, a movable shaft 13 fitted in the jig guide cylinder 11 so as to be vertically slidable, and a movable shaft 1
The same number of extension claws 21 attached to the upper end of 3 via four pivot shafts 22, a press-fitting punch 25 and an extension shaft 26 disposed above the jig guide cylinder 11, and four extension shafts 26 are provided. Is inserted into the center of the expansion claw 21 to open the expansion claw 21 and expand the diameter of the circlip C. FIG. 8 is a diagram for explaining the operation of the circlip mounting device proposed earlier. Arrows a, b, c,
By expanding the diameter of the circlip C indicated by a two-dot chain line as shown in d, the diameter of the circlip C can be expanded as indicated by a solid line, and the circlip C can be used to attach a bearing to a bearing housing. However, in the above-mentioned conventional circlip mounting device, the amount of opening of the four extension claws is constant, and when the bearing number changes, the four extension claws are different for each dimension. It is necessary to prepare. That is, the circlip mounting device is provided with a jig guide tube 1 for each circlip dimension.
1. It is a dedicated machine that needs to arrange parts such as the movable shaft 13, four pivot shafts 22, and the same number of extension claws 21. It is not versatile and equipment costs increase. Further, when the dimensions of the circlip change, a setup change operation for exchanging members such as the jig guide tube 11 occurs, and the production efficiency decreases. Further, in the conventional circlip mounting device, as shown in FIG. 8, the amount of diameter expansion is insufficient on the side of the opening 102 (the reference numeral is newly described). For example, when the inner diameter of the circlip C is Di, the inner diameter Di hardly changes on the side of the opening 102, and the inner diameter Di on the sides 103 and 103.
Becomes larger by the distance K, and assuming that the inner diameter when the diameter is expanded is Dk, the inner diameter Dk becomes Dk = Di + 2 × K, and becomes an elliptical shape. SUMMARY OF THE INVENTION It is an object of the present invention to provide a circlip diameter expanding device which can be used for a plurality of circlips having different dimensions, has versatility, reduces setup change work, and spreads the circlip evenly. . [0007] In order to achieve the above object, according to the first aspect, a circlip in which a plurality of claws are inserted into a circlip and the circlip is enlarged by widening the claws. In the diameter expanding device, the plurality of claws are characterized by comprising a first claw facing the opening of the circlip, and a second claw relatively moving forward and backward with respect to the first claw. To move the second claw relatively to the first claw means to move the first and second claws together,
This includes all of one of the second claws being stationary and the other being advanced and retreated. The first claw and the second claw are slid horizontally in a direction away from each other, and the circlip is pushed open. By setting the advance and retreat values of the first and second claws, a plurality of circlips having different dimensions between the first and second claws can be evenly spread. Therefore, the versatility is improved and the equipment cost can be reduced. [0009] Further, by setting the values of the advance and retreat of the first and second claws, a plurality of circlips having different dimensions between the first and second claws can be evenly spread. As a result, the frequency of replacing the first and second claws decreases, and the frequency of the setup change operation also decreases. Further, when the first and second claws are respectively slid, the opening of the circlip is pushed outward in the moving direction of the first claw, so that the inner diameter on the opening side is increased and the circlip is opened from the opening. The lateral side at the position of 90 ° is also pushed outward, and the inner diameter of the circlip expands to a substantially perfect circle. Embodiments of the present invention will be described below with reference to the accompanying drawings. The drawings should be viewed in the direction of reference numerals. In the center of the figure, X (see also FIG. 2) is an axis indicating a horizontal linear motion, Y is an axis orthogonal to X, Z is a vertical axis orthogonal to X and Y, and C is an axis indicating a turning motion around the Z axis. It is. FIG. 1 is a front view of a bearing press-fitting machine using a circlip diameter expanding device according to the present invention, and a bearing press-fitting machine 10 includes a bearing fitting device 11, a circlip fitting device 12, and these components. And a control device (not shown) for controlling the bearing fitting device 11 and the circlip fitting device 12.
This is a device for mounting the bearing 14 on the vehicle. Reference numeral 15 denotes a circlip. The circlip fitting device 12 includes an elevating device 16 attached to the bearing press-fitting machine 10 and an elevating device 16.
And a circlip diameter increasing device 18 attached to the turning device 17. The elevating device 16 is provided with a fixing part 21 to be attached to the bearing press-fitting machine 10, a first electric motor 22, a ball screw 23 and a linear guide 24 are attached to the fixing part 21, and an elevating detector 25 ( With the lower limit detection sensor 26, the upper limit detection sensor 27, and the detection piece 28), the circlip expanding device 18 is moved up and down in the Z-axis direction and stopped at a predetermined position in the middle. 31 is the first
A belt 32 is a first tension adjusting unit, and 33 and 33 are buffer members. The turning device 17 includes a bracket 41 attached to the lifting device 16, a second electric motor 42 attached to an end of the bracket 41, a rotating up-down mechanism 43 provided at the center of the bracket 41, and a rotating up-down mechanism 43. And a turning detector 44 (photoelectric switches 45, 45 (rear side in the figure) and a detection panel 46) provided above the circlip expanding device 18 in the C-axis direction. The device 18 is lowered synchronously with the force for pushing down the Z axis. 47 denotes a second belt, and 48 denotes a second tension adjusting unit. The rotary up-down mechanism 43 has a case 51 attached to the bracket 41, and a cylindrical member 54 is rotatably fitted in the case 51 via bearings 52 and 53.
A spline shaft 55 is slidably fitted in the cylindrical member 54 up and down, a stopper 56 is attached below the spline shaft 55, and a flange 57 and a compression spring 58 are attached above the spline shaft 55. The spline shaft 55 extends in the Z-axis direction. Along with a linear motion, a revolving motion is performed in the C-axis direction. The circlip diameter expanding device 18 is a rotating device 1.
7 and a second leg 61 on the first leg 61.
A leg 62 and a third electric motor 6 attached to the first leg 61
3, a screw propulsion unit 65 connected to the third electric motor 63 via a joint 64 and fitted to the second leg 62;
The link mechanism 66 includes a link mechanism 66 connected to the screw driving section 65, a horizontal slide section 67 attached to the link mechanism 66, and a claw 68 attached to the horizontal slide section 67. FIG. 2 is a sectional view taken along line 2-2 of FIG.
A leg 61, a second leg 62 mounted on the first leg 61, a third electric motor 63 mounted on the first leg 61, and connected to the third electric motor 63 via a joint 64, Second
A screw driving portion 65 fitted to the leg portion 62;
The circlip diameter increasing device 18 is composed of a link mechanism 66 connected to the link mechanism 66, a horizontal slide portion 67 attached to the link mechanism 66, and a pawl 68 attached to the horizontal slide portion 67. The screw propulsion unit 65 includes a male screw 71 connected to the third electric motor 63, a female screw 72, and a female screw 7.
A bush 73 for guiding the outer peripheral surface of
And a connecting portion 74 formed at the tip of the. Male thread 71
Rotates in the C-axis direction. On the other hand, the female screw portion 72 linearly moves in the Z-axis direction due to the rotation of the male screw portion 71, but does not rotate in the C-axis direction due to the link mechanism 66. The link mechanism 66 has a first arm 77 between support plates 75, 75 (see FIG. 3) via support shafts 76, 76.
A second arm 78 is swingably mounted, and first and second arms 77 and 78 are provided with first connecting portions 81 and 82 at one end and second connecting portions 83 and 84 at the other end. When the first connecting portions 81 and 82 are lifted, the second connecting portions 83 and 84 are respectively supported by the support shafts 76 and 76 as fulcrums.
Rocks like. The horizontal slide portion 67 has recesses 85a, 8 for connecting the link mechanism 66 below the guide member 85.
5a is formed, and connecting members 86, 86 are mounted on the upper side. The link mechanism 66 moves by the maximum stroke amount Sm. FIG. 3 is a perspective view of the horizontal slide portion and the claw according to the present invention.
Are shown. The guide member 85 includes two rails 8.
5b, 85b, and four carriages 85c (... indicates a plurality, the same applies hereinafter). The stroke amount can be set arbitrarily within the maximum stroke amount Sm. The pawl 68 is provided at the opening 87 of the circlip 15.
, And a second claw 89 that moves forward and backward relative to the first claw 88. The first claw 88 is formed in a rectangular shape with a flat cross section, and has a claw width of W
Circlip 1 at two points 88a and 88b at both ends.
5 and push pins 91 (see second claws 89), 91 from the lower surface. The second claw 89 is
It is the same as the claw 88, and the description is omitted. The connecting member 86 includes pins 91, 91 of the claw 68.
Holes (not shown) for fitting
It has a plunger 92 for preventing removal of the claw 91, and the claw 68 can be attached and detached. The claw width W of the claw 68 corresponds to circlips having different sizes, but if the size of the circlip is out of the predetermined range, the claw 68 is replaced. The operation of the circlip diameter expanding device described above will now be described. 4A and 4B are first operation diagrams of the circlip diameter expanding device according to the present invention, wherein FIG. 4A shows a state before diameter expansion and FIG. 5A, a work 13 (for example, a case of a speed reducer) includes a bearing mounting hole 93, a groove 94 formed on the inner surface of the bearing mounting hole 93, and a notch 93a formed on an edge of the bearing mounting hole 93. Is provided. The groove 94 of the bearing mounting hole 93 and the notch 93a are provided with an inner diameter Di.
After the circlip 15 is fitted, the claws 68 are fed into the circlip 15 and the first claws 88 face the opening 87 of the circlip 15, and the first claws 88 and the second claws 89 are respectively pointed by arrows. Open as In (b), the first claw 88 and the second claw 89
Are opened as arrows, respectively.
The opening 87 is pushed outward by the first claw 88 as shown by an arrow, and the inner diameter increases, and the sides 15a and 15a at a position 90 ° from the opening 87 are also pushed outward, thereby forming the circlip 15. Inner diameter Di (see (a))
Is enlarged to have a substantially circular inner diameter Dm. Therefore, the circlip 15 can be spread evenly. FIGS. 5A to 5C are second operation diagrams of the circlip diameter expanding device according to the present invention. In (a),
As described above, the inside diameter Di is previously set in the groove 94 of the bearing mounting hole 93 of the work 13 (for example, the case of the reduction gear).
Of the circlip 15, and the nail 6
Send 8 Specifically, the bearing press-fitting machine 10 shown in FIG.
The work 13 is set on the table (1), and the circlip expanding device 18 is inserted from below the work 13 by the elevating device 16 as shown by an arrow in FIG. On the other hand, the bearing fitting device 11 waits while holding the bearing 14. In (b), as described above, the first claw 88 and the second claw 89 are opened as indicated by arrows, respectively, so that the inner diameter of the circlip 15 becomes substantially circular.
(See FIG. 4). Subsequently, the bearing fitting device 11 is lowered, and
When the pawl 68 is pushed downward, the spline shaft 55 of the turning device 17 in FIG. In (c), the bearing fitting device 11
The claw 68 descends in synchronization with the descending speed of the circlip, and when the ring groove 95 of the bearing 14 reaches the circlip 15, the circlip 15 is fitted into the ring groove 95, and the press-fitting of the bearing 14 is completed. As described above, the pawl 68 is provided with the first pawl 88 facing the opening 87 (see FIG. 4) of the circlip 15.
And the second claw 89 which moves relatively to and away from the first claw 88, so that the circlip 15 can be evenly spread by opening the first claw 88 and the second claw 89, respectively. , The bearing 14 can be press-fitted. FIG. 6 is a third operational view of the circlip diameter expanding device according to the present invention, showing bearing mounting holes 96, 97, 98 formed in the case 13a of the speed reducer.
A state is shown in which the circlip expanding device 18 sequentially faces the bearing mounting holes 96, 97, 98. A indicates a reference line for the angle. When the circlip expanding device 18 faces the bearing mounting hole 96, the circlip expanding device 18 is turned by the turning device 17 (see FIG. 1) from the reference line A by an angle θ1. For the next bearing mounting hole 97, it is turned by an angle θ2 from the reference line A, and for the last bearing mounting hole 98, it is rotated by an angle θ3 from the reference line A.
Just swirl. Also, bearing mounting holes 96, 97, 9
8 are set to D1, D2, and D3, respectively, and one claw 68 is attached to the bearing mounting holes 96, 97, and 98.
Use to spread the circlip. As described above, in the circlip diameter increasing device 18, the claw 68 is opposed to the first claw 88 facing the opening 87 (see FIG. 4) of the circlip 15, and is relative to the first claw 88. The first and second claws 88 and 89 have different dimensions by setting a stroke amount that is a value of the first and second claws to advance and retreat. Can be evenly spread. Therefore, it is possible to cope with a plurality of circlips having different dimensions, to improve versatility, and to reduce equipment costs. Further, by setting the stroke amount of the first and second claws, a plurality of circlips having different dimensions can be uniformly spread between the first and second claws 88 and 89, respectively. As a result, the replacement frequency of the first and second claws 88 and 89 can be reduced, and the first and second claws 8 can be replaced.
The setup change work for replacing 8, 89 can be reduced. The configuration of the circlip diameter expanding device 18 shown in FIG. 2 according to the embodiment of the present invention is an example, and is used to move the claw 68 by the maximum stroke amount Sm or to stop it halfway. The mechanism is optional. The shape of the claw 68 is an example. According to the present invention, the following effects are exhibited by the above configuration. According to the first aspect, the plurality of claws to be inserted into the circlip are constituted by the first claw facing the opening of the circlip, and the second claw which moves relatively to the first claw. By setting the values of the advance and retreat of the first and second claws, a plurality of circlips having different dimensions can be uniformly spread between the first and second claws. Therefore, it is possible to cope with a plurality of circlips having different dimensions, to improve versatility, and to reduce equipment costs. By setting the advance and retreat values of the first and second claws, a plurality of circlips having different dimensions can be evenly spread between the first and second claws. As a result, the replacement frequency of the first and second claws can be reduced, and the setup change work for replacing the first and second claws can be reduced. Further, the claws are composed of the first claws facing the opening of the circlip, and the second claws moving forward and backward relative to the first claws. When each is opened, the opening of the circlip is pushed in the moving direction by the first claw, the inner diameter on the opening side is increased, and the side at 90 ° from the opening is also pushed outward, and the circlip is opened. The inner diameter expands to a perfect circle. Therefore, the circlip can be spread evenly.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a front view of a bearing press-fitting machine using a circlip diameter expanding device according to the present invention. FIG. 2 is a cross-sectional view taken along the line 2-2 in FIG. 1 FIG. FIG. 4 is a first operational view of the circlip diameter expanding device according to the present invention; FIG. 5 is a second operational view of the circlip diameter expanding device according to the present invention; FIG. FIG. 7 is a photograph of FIG. 2 of the previously proposed circlip mounting device. FIG. 8 is an operation explanatory diagram of the previously proposed circlip mounting device. Explanation 15: circlip, 18: circlip expanding device, 6
8 ... nail, 87 ... opening of circlip, 88 ... first nail,
89: Second claw.

Claims (1)

Claims: 1. Inserting a plurality of claws into a circlip,
In a circlip diameter increasing device that enlarges a circlip by widening the claw, the plurality of claws are relatively positioned with respect to a first claw facing an opening of the circlip and the first claw. A circlip diameter increasing device, comprising a second claw to be moved forward and backward.