JP2007044822A - Inner race removing device of bearing - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an inner race removing device of a bearing capable of extracting an inner race of the bearing from a rotary shaft by a simple operation, performing disassembling work of the bearing by minimal disassembling man-hours, and extracting the inner race from the rotary shaft with no fear of damaging the bearing and rotary shaft. <P>SOLUTION: This device is provided with a holding member divided into a plurality of ones to hold an outer periphery of the inner race of the bearing pressed and inserted into the rotary shaft in the radial direction, an engaging part provided on one side of the holding member to be engaged with a snap ring, a supporting member connected to the holding member via a plurality of connecting members and having a screw hole passed at a center part, and a bolt for extraction for extracting the inner race from the rotary shaft via the holding member and the snap ring since a distal end part is screwed to a screw hole of the supporting member, can be made to abut on a shaft end face of the rotary shaft, is made to abut on the shaft end face of the rotary shaft and is screwed into the screw hole of the supporting member. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention is applied to removal of an inner race of a main shaft bearing of a vehicle transmission, and the like in a bearing that supports the rotary shaft by inserting the bearing into the outer periphery of the inner race that is press-fitted into the rotary shaft. The present invention relates to a bearing inner race removing device for removing an inner race from a rotating shaft.

When disassembling and maintaining a vehicle transmission, one method of extracting a pilot bearing supported by the main shaft from the main shaft is to use a puller having claws as shown in FIG.
In FIG. 5, 1 is a main shaft, 6 is a bearing (pilot bearing) that supports the end of the main shaft 1, 9 is a gear train mounted on the main shaft 1, 8 is a puller with pawls, and 8a is the This is a pull-out bolt of the puller 8.

When the inner race 5 (see FIG. 4) of the bearing 6 press-fitted to the main shaft 1 is extracted from the main shaft 1 using the puller 8, a snap for preventing the bearing 6 from coming off from the main shaft 1 is used. The ring (see FIG. 4) is removed, and then the bearing 6 is removed from the main shaft 1.
Next, a tool such as a bar is pushed into a slight gap 5a (see FIG. 4) between the inner end surface of the inner race 5 and the main shaft 1 to widen the gap 5a, and a plurality of (three in this example) arms 8d of the puller 8. A hook 8b formed at the tip of the arm 8 is hooked on the gap 5a, and the pull-out bolt 8a is screwed into a screw hole at the center of the arm 8d while the tip of the pull-out bolt 8a is brought into contact with the shaft end surface of the main shaft 1. The race 5 is extracted outside the main shaft 1.

Moreover, the technique of patent document 1 (Unexamined-Japanese-Patent No. 2002-52481) is provided as a means to extract the annular member press-inserted by the rotating shaft.
In such a technique, a step is formed concentrically on the inner surface of the two half-ring members and a protrusion is provided on the outer surface, and the annular member is sandwiched between the two half-ring members, and the protrusion The extraction jig is hooked on the annular member, and the annular member is extracted from the rotation shaft in the axial direction.

JP 2002-52481 A

In extracting the bearing (pilot bearing) for supporting the main shaft from the main shaft as described above, the end bearing is extracted with few man-hours of disassembly without damaging the peripheral extending material of the end bearing. Is required.
However, in the prior art shown in FIG. 5, the claw 8b at the tip of the arm 8d of the puller 8 is widened to the gap 5a between the inner end surface of the inner race 5 and the main shaft 1, and is then hooked on the gap 5a. The inner race 5 is extracted to the outside of the main shaft 1 by screwing the extraction bolt 8a into the screw hole at the center of the arm 8d while the tip end of the extraction bolt 8a is in contact with the shaft end surface of the main shaft 1, so that the gap 5a After performing a complicated and time-consuming operation of hooking a plurality of (three in this example) claws 8b into the gap 5a while opening and closing the arm 8d, the tip of the extraction bolt 8a is Since the extraction bolt 8a is screwed into the screw hole at the center of the arm 8d while being in contact with the shaft end surface of the main shaft 1, the inner race 5 Requires many steps to extraction, it becomes large disassembly steps of the bearing.

  Further, in this prior art, the claw 8b at the tip of the arm 8d of the puller 8 is pushed into the narrow gap 5a between the inner end surface of the inner race 5 and the main shaft 1 side member, and the inner end surface of the inner race 5 is Since the hook is hooked on the claw 8b, the sharp claw 8b may damage the parts on the rotating shaft (main shaft 1) side such as the spacer 4.

  Further, in Patent Document 1 (Japanese Patent Application Laid-Open No. 2002-52481), since the step and the annular member are in surface contact with each other in a concentric manner on the inner surface of the two half-ring members, the component on the rotating shaft side Although it is possible to avoid scratching, the extraction jig connected to the projecting portion of the semi-ring-shaped member is not clearly described, and it is not possible to meet the requirement for extracting the bearing with a small number of disassembly steps as described above. .

  Therefore, in view of the problems of the prior art, the present invention enables the inner race of the bearing to be extracted from the rotating shaft by a simple operation, and allows the bearing to be disassembled with a small number of disassembly man-hours. It is an object of the present invention to provide a bearing inner race removing device capable of extracting a bearing inner race from a rotating shaft in a state where there is no fear of scratching the bearing.

The present invention achieves such an object, and in the inner race removing device for a bearing for removing the inner race of the bearing in which the snap ring is inserted into the annular groove on the outer periphery of the inner race pressed into the rotating shaft from the rotating shaft, A plurality of divided clamping members that sandwich the outer periphery of the inner race in the radial direction, an engaging portion that is provided on one side of the clamping member and engages with the snap ring, and a plurality of connecting members that are connected to the clamping member A support member that is connected and has a screw hole penetrating through the center thereof, and is screwed into the screw hole of the support member, and a tip end portion thereof can be brought into contact with a shaft end surface of the rotary shaft, and the tip portion is made to contact the rotary shaft An extraction bolt for pulling out the inner race from the rotating shaft through the clamping member and the snap ring by abutting on the shaft end surface of the support member and screwing it into the screw hole of the support member. Characterized in that the (claim 1).
In this invention, preferably, each of the connecting members is provided with an elongated hole formed in the same direction as the direction in which the plurality of connecting members are inserted into the support member and the clamping member sandwiches the inner race. The support member and the sandwiching member are coupled by inserting a connecting member through the elongated hole and fastening to the sandwiching member (Claim 2).

Further, with respect to a removing method for removing the bearing using the removing device, the bearing is configured by inserting a snap ring into an annular groove on the outer periphery of the annular inner race press-fitted into the rotating shaft, and supporting the rotating shaft. A method of removing an inner race of a bearing for removing the inner race from the rotating shaft, wherein the inner race is sandwiched in a radial direction by a plurality of clamping members and is inserted into an outer periphery of the inner race. A support member having a screw hole penetrating through the central portion thereof is connected to the holding member via a plurality of connecting members, and the tip end portion of the extraction bolt is connected to the holding member. The outer end surface of the clamping member is moved to the side surface of the snap ring by pressing against the shaft end surface of the rotating shaft and screwing the extraction bolt into the screw hole of the support member. Hooked, can be easily withdrawn the inner race from the rotational axis together with the snap ring.

According to the present invention, the inner race is sandwiched in the radial direction by sandwiching the inner race between the plurality of sandwiched members, thereby the inner race is sandwiched by the sandwiching member, and the snap ring inserted into the inner race is formed on the sandwiching member. The inner race of the detaching device is obtained by two steps of engaging the engaging portion, pressing the tip end portion of the extraction bolt against the shaft end surface of the rotary shaft, and screwing the extraction bolt into the screw hole of the support member. The inner race can be easily pulled out from the rotating shaft together with the snap ring by simply screwing the extraction bolt into the screw hole of the support member. It can be performed.
Further, according to the present invention, the inner race is only lightly sandwiched between a plurality of divided clamping members, and the side surface of the snap ring is utilized by utilizing the bearing retaining snap ring inserted into the inner race. By engaging the engaging portion formed on the clamping member, the inner race with the snap ring can be easily extracted from the rotating shaft, and the inner race can be easily extracted with a small force.

In addition, the clamping member clamps the inner race in the radial direction, and the inner race is removed from the rotating shaft by screwing the extracting bolt into the screw hole of the support member while pressing the tip of the extracting bolt against the shaft end surface of the rotating shaft. Therefore, the puller equipped with the nail according to the prior art is in a surface contact state between the removing device (clamping member) and the inner race and in a surface contact state between the extraction bolt and the shaft end surface of the rotary shaft. The inner race can be extracted from the rotating shaft without any fear of scratching the inner race or the rotating shaft as in the method used (FIG. 5).
Further, if the plurality of connecting members and the extracting bolts are extracted from the holding members and the supporting members, the plurality of connecting members, extracting bolts, the holding members and the supporting members can be easily divided, and the removing device is compact without being bulky. Can be stored.

  Each of the connecting members is provided with an elongated hole formed in the same direction as a direction in which the plurality of connecting members are inserted into the support member and the clamping member sandwiches the inner race. If the support member and the sandwiching member are connected by inserting the hole and fastening to the sandwiching member (Claim 2), each connecting member can be moved by a minute amount within the slot, The extraction bolt can be easily set and adjusted to the rotation axis center.

  Hereinafter, the present invention will be described in detail with reference to the embodiments shown in the drawings. However, the dimensions, materials, shapes, relative arrangements, and the like of the component parts described in this example are not intended to limit the scope of the present invention only to specific examples unless otherwise specified. Only.

FIG. 4 is a cross-sectional view of a main shaft shaft end portion of a vehicle transmission to which the present invention is applied. In the figure, 1 is a main shaft, 2 is a gear spline-coupled to the main shaft 1, and 6 is a bearing (which constitutes an end bearing, and in this example is a needle roller bearing). An inner race 5 of the bearing 6 is press-fitted into the shaft end portion of the main shaft 1.
7 is a snap ring for retaining the inner race 5 inserted into the end of the main shaft 1, 3 is an outer race of the bearing 6, 4 is a needle roller of the bearing 6, and 9 is an annular groove of the inner race 5. A snap ring 1z for preventing the outer race 3 and the needle roller 4 from being inserted and inserted into 5a is a rotation axis of the main shaft 1.

The present invention relates to a bearing inner race removing device applied to disassembly of an inner race of a main shaft bearing of a vehicle transmission as shown in FIG.
FIG. 1 is an external perspective view showing the overall structure of a main shaft end bearing removing device for a vehicle transmission according to an embodiment of the present invention. 2 is a cross-sectional view taken along the line AA of FIG. 1 in the above-described embodiment. FIG. 2A shows a state in which the removing device is attached before the inner race is pulled out, and FIG. FIG. 3 is a sectional view taken along line BB in FIG.

  1 to 3, reference numeral 11 denotes a support member formed in a thick plate shape having a rectangular front shape, and 12 denotes a sandwiching member formed in a thick plate shape having a rectangular front shape and divided into a plurality. As shown in FIG. 3, the holding member 12 is divided into an upper member 12a and a lower member 12b by a horizontal fastening surface 12c including the rotational axis 1z of the main shaft 1, and the upper member 12a and the lower member 12b. Are tightened and fixed by two (a plurality of bolts) tightening bolts 19 and nuts 20 penetrating vertically.

Reference numeral 15 denotes a connecting bolt (connecting member) for connecting the support member 11 and the clamping member 12, as shown in FIG. 1, four on the both sides of the main shaft 1 (if there are four or more even numbers). A screw hole formed in the clamping member 12 by being inserted through a long hole 16 formed in the same direction as the clamping direction of the inner race. The support member 11 and the clamping member 12 are connected by screwing.
Reference numeral 13 denotes an extraction bolt, which is screwed into a screw hole 14a formed concentrically with the rotation axis 1z of the main shaft 1 on the support member 11 and a nut 14 welded thereto, as shown in FIG. Can be brought into contact with the shaft end surface 1 b of the main shaft 1.

When the inner race of the main shaft end bearing of the vehicle transmission as shown in FIG. 4 is removed (extracted) using the bearing inner race removing device having such a configuration, the snap ring 9, the needle roller 4, The snap ring 7 for retaining the outer race 3 and the inner race 5 is removed, and the snap ring 9 is attached to the annular groove 5a on the outer periphery of the inner race again.
As shown in FIGS. 2A and 3, first, the inner race 5 is sandwiched between the upper member 12 a and the lower member 12 b of the split member 12, and the upper member 12 a is connected to the upper member 12 a by a tightening bolt 19 and a nut 20. The lower member 12b is tightened. Thereby, the inner race 5 is clamped between the upper member 12a and the lower member 12b of the clamping member 12 in the radial direction.

Next, as shown in FIG. 1, the four connecting bolts 15 are inserted into the long holes 16 drilled in the support member 11 and screwed into the screw holes formed in the clamping member 12. The clamping member 12 is connected.
In this case, each of the connecting bolts (connecting members) 15 is inserted into each of the long holes 16 provided in the support member 11 and then screwed into the holding member 12 so that the supporting member 11 and the holding member 12 are connected. Since each connecting bolt (connecting member) 15 can be moved by a minute amount in the long hole 16, setting and adjustment of the extraction bolt 13 to the rotational axis 1z as will be described later. Can be easily done.

Next, as shown in FIGS. 2A and 2B, the extraction bolt 13 is screwed into the screw hole 14 a of the support member 11, and the tip end of the extraction bolt 13 is attached to the shaft end surface 1 b of the main shaft 1. 2B, the extraction bolt 13 is rotated as shown in FIG. 2A, and the engaging portion 12d provided on one side of the holding member 12 is inserted into the inner race 5 as shown in FIG. The inner race 5 is extracted from the main shaft 1 together with the snap ring 9 by engaging with the side surface of the snap ring 9 formed.
If comprised in this way, it is not necessary to clamp | tighten the said fastening volt | bolt 19 and the nut 20 strongly, and the inner peripheral surface of the split member 12 and the outer peripheral surface of the inner race 5 do not need to be press-contacted. By simply sandwiching the inner race 5 between the upper member 12a and the lower member 12b, a snap ring 9 for retaining the bearing fitted in the inner race 5 is used, and a clamping member is attached to the side surface of the snap ring 9 The inner race 5 with the snap ring 9 can be easily extracted from the main shaft 1 by engaging the 12 engaging portions 12d, and the inner race 5 can be easily extracted with a small force.

  According to this embodiment, the inner race 5 is sandwiched in the radial direction between the split member 12 divided in half, the engaging portion 12d of the sandwiching member 12 is applied to the snap ring 9 fitted and inserted into the inner race 5, and the extraction bolt 13 to the inner race 5 and main shaft 1 side of the bearing inner race removing device in two steps of pressing the tip end of the shaft 13 against the shaft end surface of the main shaft 1 and screwing the extraction bolt into the screw hole of the support member. The inner race 5 can be easily extracted from the main shaft 1 simply by screwing the extraction bolt 13 into the screw hole 14a of the support member 11, and the end bearing can be disassembled with a small number of disassembly steps. It can be performed.

Further, the inner race 5 is sandwiched in the radial direction between the upper member 12a and the lower member 12b of the sandwiching member 12, and the engaging portion 12d of the sandwiching member 12 is applied to the snap ring 9, and the distal end portion of the extraction bolt 13 is attached. The inner race 5 is extracted from the main shaft 1 together with the snap ring 9 by screwing the extraction bolt 13 into the screw hole 14a of the support member 11 while being pressed against the shaft end surface 1b of the main shaft 1, so that the holding member 12 and the inner A method using a puller equipped with claws according to the prior art in a surface contact state with the race 5 and also in a surface contact state between the extraction bolt 13 and the shaft end surface 1b of the main shaft 1 (FIG. 5). As shown in FIG. 2, the inner race 5 can be connected to the main shaft without any fear of damaging the inner race 5 or the main shaft 1. It can be withdrawn from the 1.
Further, when the plurality of connection bolts (connection members) 15 and the extraction bolts 13 are extracted from the holding member 12 and the support member 11, the plurality of connection bolts (connection members) 15, the extraction bolts 13, the holding member 12 and the support are supported. The member 11 can be easily divided, and the end bearing removing device can be stored compactly without being bulky.

  According to the present invention, the inner race of the bearing can be extracted from the rotating shaft with a simple operation, the disassembling work of the bearing can be performed with a small number of disassembling steps, and the inner race and the rotating shaft of the bearing can be damaged. It is possible to provide a bearing inner race removing device capable of extracting the inner race of the bearing from the rotating shaft in a state where there is no fear of attaching the bearing.

1 is an external perspective view showing an overall structure of an inner race removing device for a main shaft bearing of a vehicle transmission according to an embodiment of the present invention. FIG. 2 is a cross-sectional view taken along the line AA of FIG. 1 in the embodiment, in which (A) shows a state where the inner race is being pulled out, and (B) shows the middle race being pulled out. It is the BB sectional drawing of FIG. 1 in the said Example. It is sectional drawing of the main shaft shaft edge part of the transmission for vehicles to which this invention is applied. It is an external appearance perspective view of the removal apparatus of the edge part bearing for main shafts which concerns on a prior art.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Main shaft 1z Rotating shaft center 5 Inner race 5a Annular groove 6 Bearing 9 Snap ring 11 Support member 12 Holding member 12d Engagement part 13 Extraction bolt 14a Screw hole 15 Connection bolt (connection member)
16 Long hole 19 Tightening bolt 20 Nut

Claims (2)

  An inner race removing device for a bearing that removes an inner race of a bearing in which a snap ring is inserted into an annular groove on the outer circumference of the inner race that is press-fitted into the rotating shaft from the rotating shaft. A divided clamping member, an engaging portion provided on one side of the clamping member and engaged with the snap ring, and connected to the clamping member via a plurality of connecting members, and a screw hole penetrating through a central portion. The support member is screwed into the screw hole of the support member, and the tip end portion is brought into contact with the shaft end surface of the rotation shaft. An inner bearing for a bearing, comprising: an extraction bolt for extracting the inner race from the rotating shaft through the clamping member and a snap ring by screwing into the hole. Scan removable devices.   The plurality of connecting members are inserted into the support member, and long holes formed in the same direction as the sandwiching member sandwiches the inner race are provided for each connecting member, and the connecting members are provided with the long holes. 2. The inner race removing device for a bearing according to claim 1, wherein the support member and the clamping member are connected by being inserted and fastened to the clamping member.

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