JP3900457B2 - Bearing extraction jig - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a bearing pulling jig, and more particularly to a bearing pulling jig used for pulling out an outer race of a bearing press-fitted into a bearing mounting hole.
[0002]
[Prior art]
As this type of bearing pull-out jig, Japanese Utility Model Laid-Open No. 5-39874 discloses, for example, removing an outer race of a bearing that is press-fitted into a bearing mounting hole provided at the back of a propeller shaft insertion chamber of an outboard motor. A bearing puller is disclosed. The bearing puller has an adapter that is fixed to the distal end portion of the operating rod and is inserted into the outer race. The adapter is provided with a spring so that the outer race extends in the diameter direction and can be engaged with the inner end surface. A pair of biased pawls that are biased are mounted so as to be able to move in and out from the outer peripheral surface. The tip of the pair of locking claws has a spherical shape that engages with the outer end surface of the pair of locking claws and retracts the pair of locking claws to retract inside the outer race when inserted into the outer race. A cam taper surface is formed.
[0003]
In order to remove the outer race using the bearing puller described in the above publication, first, the adapter is inserted together with the operating rod into the inner side of the outer race press-fitted into the bearing mounting hole at the back of the propeller shaft insertion chamber. In that case, it positions and inserts so that a pair of latching nail | claw with which the adapter was mounted | worn may correspond with a pair of concave groove formed facing the diameter direction of the bearing mounting hole. Then, the pair of locking claws are fitted into the pair of concave grooves and engaged with the inner end face of the outer race. Next, a separate flange-shaped adapter is attached to the base end portion of the operating rod, and the flange-shaped adapter is pressed against a substantially vertical end surface of the entrance of the propulsion shaft insertion chamber by a nut screwed to the rear thereof. Subsequently, the nut is further rotated from this state to pull back the operating rod, and the outer race is pulled out through the pair of locking claws.
[0004]
[Problems to be solved by the invention]
By the way, in the bearing puller described in the publication, when the adapter is inserted inside the outer race, the adapter is positioned so that the pair of locking claws of the adapter matches the pair of concave grooves formed in the bearing mounting hole. Therefore, there is a problem that the work requires skill. In addition, since the latching claws for pulling out the outer race are configured as a pair that engages in two locations in the diametrical direction of the outer race, the outer race is likely to bend when the outer race is pulled out. The bearing mounting hole may be damaged. Furthermore, when pulling out the outer race, it is necessary to press the flange-shaped adapter attached to the base end of the operating rod against the substantially vertical end surface of the entrance of the propulsion shaft insertion chamber, and such an end surface is inserted into the propulsion shaft. If it does not exist at the entrance of the chamber, there is a problem that the outer race cannot be pulled out.
[0005]
Then, this invention makes it a subject to provide the bearing extraction jig | tool which can extract an outer race reliably and easily, without damaging a bearing mounting hole.
[0006]
[Means for Solving the Problems]
As a means for solving the above-mentioned problems, a bearing pulling jig according to the present invention is a jig for pulling out an outer race of a bearing press-fitted into a bearing mounting hole, and a tip is provided at the hole bottom of the bearing mounting hole. A screw shaft member for pulling operation that is rotated in contact with the inner shaft member, and an inner adapter member that is inserted into the outer race together with the screw shaft member by screwing the screw shaft member through the center portion; An outer adapter member that is coaxially mounted with respect to the inner adapter member and is inserted inside the outer race together with the inner adapter member, and is formed at a plurality of locations in the circumferential direction of the outer peripheral surface of the inner adapter member. Each outer peripheral recess, each inner peripheral recess formed at a plurality of locations on the inner peripheral surface of the outer adapter member so as to face these outer peripheral recesses, each outer peripheral recess and each inner peripheral recess Fulcrum protrusion being respectively fitted into the annular groove formed on the inner adapter member between is formed, the inner end surface of the outer race is swingably held in the axial direction of the outer race to the inner adapter member by an O-ring A plurality of engaging hook members that can be engaged with and disengaged from each other, and on the inner peripheral surface of the outer adapter member, a guide surface that swings each engaging hook member to a position engageable with the inner end surface of the outer race. Is formed in an arcuate section along the circumferential direction continuously to the bottom of each inner peripheral recess.
[0007]
In order to use the bearing pulling jig of the present invention, first, as a preparatory work, the inner adapter member and the outer adapter member are relatively rotated so that the outer peripheral concave portion and the inner peripheral concave portion face each other. The engaging hook member is held swingably. Then, the inner adapter member and the outer adapter member together with the screw shaft member are inserted inside the outer race that is press-fitted into the bearing mounting hole. At that time, each engaging hook member passes through the inner side of the outer race while swinging following the inner peripheral surface of the outer race. Therefore, the inner adapter member and the outer adapter member are inserted to a position where each engagement hook member can engage with the inner end surface of the outer race, and then the outer adapter member is rotated with respect to the inner adapter member. Each engaging hook member is swung to a position that can be engaged with the inner end surface of the outer race along the inner peripheral guide surface. Next, the screw shaft member is rotated in the screwing direction with respect to the inner adapter member, and its tip is brought into contact with the bottom of the bearing mounting hole. Subsequently, the screw shaft member is further rotated from this state, the inner adapter member and the outer adapter member are pulled back, and the outer race is engaged with each of the engagement hook members engaged with a plurality of positions in the circumferential direction on the inner end surface of the outer race. Pull out.
[0008]
In the bearing pull-out jig according to the present invention, a tool hook portion for rotation operation is formed at the base end portion of the screw shaft member, and the rotation operation members protrude from the end surfaces of the base end portions of the inner adapter member and the outer adapter member, respectively. It is preferable that the screw shaft member can be reliably rotated with respect to the inner adapter member and the outer adapter member can be reliably rotated with respect to the inner adapter member. In this case, the rotation operation member of the inner adapter member is disposed at a position where the outer peripheral recess of the inner adapter member is clearly indicated, and the rotation operation member of the outer adapter member is disposed at a position where the inner peripheral recess of the outer adapter member is clearly indicated. It is preferable that the outer adapter member can be appropriately rotated with respect to the inner adapter member.
[0009]
In the bearing pull-out jig according to the present invention, the inner adapter member has a large-diameter guide portion slidably fitted to the inner peripheral surface of the outer race on the distal end side, and the outer adapter member on the proximal end side. When the outer adapter member has a fitting portion that is slidably fitted to the inner peripheral surface of the outer race in succession to the guide portion of the inner adapter member. The inner adapter member and the outer adapter member can be smoothly inserted along the inner peripheral surface of the outer race, and the outer race can be smoothly pulled out by being fitted to the outer adapter member.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of a bearing pulling jig according to the present invention will be described below with reference to the drawings. In the drawings to be referred to, FIG. 1 is a longitudinal sectional view showing a stage of inserting a bearing pulling jig according to an embodiment, and FIG. 2 is a plan view in which an engagement hook member of the bearing pulling jig shown in FIG. 3 is an enlarged perspective view showing an engagement hook member constituting the bearing pulling jig shown in FIG.
[0011]
As shown in FIGS. 1 and 2, the bearing pulling jig according to one embodiment pulls out an outer race C of a bearing press-fitted into a bearing mounting hole B formed in a gear housing A of an outboard motor, for example. A jig used for work, a screw shaft member 1 for pulling operation in which a tip portion is inserted into the bearing mounting hole B, and an inner adapter member 2 inserted inside the outer race C together with the screw shaft member 1 An outer adapter member 3 inserted into the outer race C together with the inner adapter member 2, and a plurality of engaging hook members 4 held swingably between the inner adapter member 2 and the outer adapter member 3. And the main part.
[0012]
The bearing mounting hole B has a stepped portion B1 that locks the inner end surface C1 of the outer race C press-fitted into the bearing mounting hole B, and the tip end surface of the screw shaft member 1 is rotatable in the hole bottom B2. A supporting center hole B3 is formed. The thickness of the outer race C is set to be larger than the width of the stepped portion B1, and the inner end face C1 is exposed on the inner peripheral side of the stepped portion B1.
[0013]
The screw shaft member 1 is formed in a spherical shape whose front end surface 1A is rotatably supported by the center hole B3, and a male screw portion 1B is formed from the vicinity thereof to the central portion in the length direction. A hexagonal cross-section tool hook 1C for rotation operation is formed at the base end of the screw shaft member 1.
[0014]
The inner adapter member 2 has a nut shape having a female screw portion 2A at the center portion to which the male screw portion 1B of the screw shaft member 1 is screwed. A large-diameter guide portion 2B that is slidably fitted to the inner circumferential surface of the outer race C is formed on the distal end side of the inner adapter member 2, and the distal end corner portion is inserted into the outer race C. A chamfered portion 2C of 45 degrees for guiding is formed. Further, on the base end side of the inner adapter member 2, a small-diameter exterior portion 2 </ b> D that covers the outer adapter member 3 concentrically so as to be relatively rotatable is formed. An annular groove 2E is formed between the small diameter exterior portion 2D and the large diameter guide portion 2B.
[0015]
Here, at three positions in the circumferential direction of the outer peripheral surface of the inner adapter member 2, outer peripheral recesses 2F for holding the engaging hook members 4 are formed at equal intervals. Each outer peripheral recess 2F is formed in a groove shape parallel to the screw shaft member 1 from the large-diameter guide portion 2B to the small-diameter exterior portion 2D, and the depth thereof is about half the depth of the annular groove 2E. Is set.
[0016]
In addition, on the end face of the exterior portion 2D on the proximal end side of the inner adapter member 2, a turning operation member 5 bent and formed in an L shape protrudes at a location clearly showing the outer peripheral recess 2F. That is, the rotation operation member 5 has a base end portion disposed between the outer peripheral recess 2F and the female screw portion 2A so that the rotation operation member 5 is non-rotatably planted on the end surface of the exterior portion 2D. The inner adapter member 2 protrudes radially outward to clearly indicate the position of the outer peripheral recess 2F.
[0017]
On the other hand, the outer adapter member 3 has a cylindrical shape that is concentrically fitted to the outer periphery of the inner adapter member 2, that is, the outer periphery of the small-diameter exterior portion 2D. The distal end surface of the outer adapter member 3 is in contact with the stepped portion on the proximal end side of the large-diameter guide portion 2B, and the outer adapter member 3 protrudes toward the inner peripheral side of the outer adapter member 3 so as to have a small diameter exterior. A flange portion 3A that abuts against the end surface of the portion 2D is formed. A small-diameter fitting portion 3B that is slidably fitted to the inner circumference of the outer race C is connected to the outer-diameter guide portion 2B of the inner adapter member 2 on the distal end side of the outer circumference of the outer adapter member 3. Is formed.
[0018]
Here, at three locations in the circumferential direction of the inner peripheral surface of the outer adapter member 3, inner peripheral recesses 3 </ b> C for holding the engagement hook members 4 are formed at equal intervals. Each inner circumferential recess 3 </ b> C is formed in a wide groove shape that faces each outer circumferential recess 2 </ b> F of the inner adapter member 2 and extends from the distal end of the outer adapter member 3 to the flange portion 3 </ b> A on the proximal end side. Then, both side wall portions continuing to the lower portion of each inner peripheral recess 3C serve as guide surfaces 3D and 3D for swinging each engagement hook member 4 to a position engageable with the inner end surface C1 of the outer race C. The outer adapter member 3 is formed in an arcuate cross section that extends along the circumferential direction.
[0019]
In addition, on the end face on the base end side of the outer adapter member 3, a turning operation member 6 bent in an L shape is provided so as to protrude at a place where the inner peripheral recess 3C is clearly shown. That is, the rotation operation member 6 has a base end portion disposed radially outward from the inner circumferential recess 3C and is planted on the end surface of the outer adapter member 3 so as not to rotate, and a distal end portion thereof is an outer portion. The position of the inner peripheral recess 3 </ b> C is clearly shown by protruding outward in the radial direction of the adapter member 3.
[0020]
Each engagement hook member 4 is swingably held between the outer peripheral recess 2F of the inner adapter member 2 and the inner peripheral recess 3C of the outer adapter member 3, and can be engaged with and disengaged from the inner end surface C1 of the outer race C. It has a block shape with a width dimension that is slidably fitted into the outer peripheral recess 2F. As shown in FIGS. 1 and 3, the engaging hook member 4 is engaged with and disengaged from a fulcrum protrusion 4A fitted into the annular groove 2E of the inner adapter member 2 as an oscillating fulcrum and an inner end surface C1 of the outer race C. A possible claw portion 4B, a first restricting portion 4C that abuts the bottom of the inner peripheral recess 3C of the outer adapter member 3 at a swing position where the claw portion 4B is retracted inside the outer race C, and an inner portion at this swing position. And a second restricting portion 4D that comes into contact with the bottom of the outer peripheral recess 2F formed in the guide portion 2B of the adapter member 2.
[0021]
Further, as shown in FIGS. 3 and 4, the engaging hook member 4 contacts the inner peripheral surface of the outer adapter member 3 at a swing position where the claw portion 4B can engage with the inner end surface C1 of the outer race C. It has the 1st positioning part 4E which contacts, and the 2nd positioning part 4F contact | abutted to the bottom part of the outer periphery recessed part 2F formed in exterior part 2D of the inner adapter member 2 in this rocking | fluctuation position. And between the 1st positioning part 4E and the nail | claw part 4B of this engagement hook member 4, the step part which latches the O-ring 7 (refer FIG. 1 and FIG. 4) with which the 1st positioning part 4E was mounted | worn. 4G is formed. Note that a relief groove 3E into which the O-ring 7 can be fitted is formed on the inner periphery of the distal end portion of the outer adapter member 3.
[0022]
The bearing pull-out jig according to the embodiment configured as described above is, for example, an outer race C of a bearing press-fitted into a bearing mounting hole B formed in a gear housing A of an outboard motor as shown in FIG. Used for pulling out. In this pull-out operation, first, as a preparatory operation, the inner adapter member 2 and the outer adapter member 3 are relatively rotated so that the outer peripheral recess 2F and the inner peripheral recess 3C face each other (see FIG. 2). In this operation, the rotation operation member 5 protruding from the end surface of the exterior portion 2D of the inner adapter member 2 and the rotation operation member 6 protruding from the base end surface of the outer adapter member 3 are aligned. It is possible to carry out the operation very easily and reliably by rotating each of them.
[0023]
As a result of the preparatory work, each engagement hook member 4 is held swingably between the outer peripheral recess 2F of the inner adapter member 2 and the inner peripheral recess 3C of the outer adapter member 3 around the fulcrum protrusion 4A. It becomes possible to engage and disengage with the inner end face C1 of C. Therefore, the inner adapter member 2 and the outer adapter member 3 together with the screw shaft member 1 are inserted inside the outer race C press-fitted into the bearing mounting hole B. At that time, since the chamfered portion 2C of 45 degrees is formed at the tip corner portion of the guide portion 2B on the tip side of the inner adapter member 2, the insertion work to the inside of the outer race C is extremely easy and Can be done reliably.
[0024]
Along with the above insertion operation, the large-diameter guide portion 2B of the inner adapter member 2 and the fitting portion 3B of the outer adapter member 3 continuous thereto are smoothly inserted along the inner peripheral surface of the outer race C. At this time, each engagement hook member 4 passes through the inner side of the outer race B by the claw portion 4B following the inner peripheral surface of the outer race C while swinging around the fulcrum protrusion 4A. Meanwhile, in the engaging hook member 4, the first restricting portion 4C comes into contact with the bottom of the inner peripheral recess 3C of the outer adapter member 3, and the second restricting portion 4D comes into contact with the bottom of the outer peripheral recess 2F of the inner adapter member 2. Thus, the claw portion 4B is held at the swinging position retracted inside the outer race C.
[0025]
Subsequently, as shown in FIG. 1, after the inner adapter member 2 and the outer adapter member 3 are inserted to a position where the claw portions 4B of the respective engagement hook members 4 can engage with the inner end face C1 of the outer race C, the inner adapters are inserted. The outer adapter member 3 is rotated with respect to the member 2. This operation can be performed very easily and reliably by rotating the rotation operation member 6 on the outer adapter member 3 side with respect to the rotation operation member 5 on the inner adapter member 2 side. . As a result of this operation, each engagement hook member 4 swings along the guide surface 3D of the outer adapter member 3 shown in FIG. 2, and each claw portion 4B is connected to the inner end surface of the outer race C as shown in FIG. C1 can be engaged.
[0026]
Next, the screw shaft member 1 is rotated in the screwing direction with respect to the inner adapter member 2 so that the tip surface 1A is brought into contact with the center hole B3 formed in the hole bottom B2 of the bearing mounting hole B. In this work, a tool such as a spanner is hung on the tool hooking portion 1C at the base end portion of the screw shaft member 1 while the rotation operation member 5 and the rotation operation member 6 are gripped, and this is screwed into the screw shaft member 1. By rotating in the direction, it can be performed very easily and reliably. When the screw shaft member 1 is further rotated from this state, the inner adapter member 2 and the outer adapter member 3 are pulled back along the screw shaft member 1. Accordingly, the claw portions 4B of the respective engagement hook members 4 arranged at equal intervals in three circumferential directions are evenly engaged with the inner end face C1 of the outer race C, and the outer races are interposed via these claw portions 4B. C is pulled out from the bearing mounting hole B without rolling.
[0027]
In the bearing pull-out jig according to one embodiment, as described above, the claw portions 4B of the engaging hook members 4 arranged at equal intervals in the three circumferential directions are equally engaged with the inner end surface C1 of the outer race C. Therefore, the outer race C can be reliably pulled out without damaging the bearing mounting hole B. Further, this series of operations can be easily performed without requiring skill.
[0028]
In the bearing pulling jig of the present invention, the engaging hook members 4 may be arranged at equal intervals in four places in the circumferential direction. Moreover, as long as each outer periphery recessed part 2F of the inner adapter member 2 and each inner periphery recessed part 3C of the outer adapter member 3 are formed in the location which can face, these are not necessarily formed in the circumferential direction at equal intervals. Also good.
[0029]
【The invention's effect】
As described above, in the bearing pull-out jig of the present invention, when the inner adapter member and the outer adapter member are relatively rotated so that the outer peripheral concave portion and the inner peripheral concave portion face each other, the respective engaging hook members are both Between the inner race and the outer race. In this state, when the inner adapter member and the outer adapter member are inserted together with the screw shaft member into the inner side of the outer race press-fitted into the bearing mounting hole, each engagement hook member swings following the inner peripheral surface of the outer race. While passing through the outer race. Then, after inserting the inner adapter member and the outer adapter member to a position where each engaging hook member can be engaged with the inner end surface of the outer race, the outer adapter member is rotated with respect to the inner adapter member. The member swings along the guide surface on the inner peripheral surface of the outer adapter member, and can engage with the inner end surface of the outer race. Subsequently, the screw shaft member is rotated in the screwing direction with respect to the inner adapter member, the tip thereof is brought into contact with the bottom of the bearing mounting hole, and when the screw shaft member is further rotated from this state, the inner adapter member and the outer The adapter member is pulled back along the screw shaft member, and the outer race is pulled out from the bearing mounting hole via each engagement hook member that engages with a plurality of circumferential positions on the inner end surface of the outer race. That is, according to the bearing pulling jig of the present invention, the outer race can be pulled out from the bearing mounting hole reliably and easily without damaging the bearing mounting hole.
[0030]
In the bearing pull-out jig according to the present invention, a tool hook portion for rotation operation is formed at the base end portion of the screw shaft member, and the rotation operation members protrude from the end surfaces of the base end portions of the inner adapter member and the outer adapter member, respectively. When provided, the screw shaft member can be reliably rotated with respect to the inner adapter member, and the outer adapter member can be reliably rotated with respect to the inner adapter member. In this case, the rotation operation member on the inner adapter member side is disposed at a position where the outer peripheral recess of the inner adapter member is clearly shown, and the rotation operation member on the outer adapter member side is disposed at a position where the inner peripheral recess of the outer adapter member is clearly indicated. Thus, the outer adapter member can be appropriately rotated with respect to the inner adapter member.
[0031]
In the bearing pull-out jig according to the present invention, the inner adapter member has a large-diameter guide portion slidably fitted to the inner peripheral surface of the outer race on the distal end side, and the outer adapter member on the proximal end side. When the outer adapter member has a small-diameter exterior portion to be exteriorized, and the outer adapter member has a fitting portion that is slidably fitted to the inner peripheral surface of the outer race continuously to the guide portion of the inner adapter member. The inner adapter member and the outer adapter member can be smoothly inserted along the inner peripheral surface of the outer race, and the outer race can be fitted into the outer adapter member and smoothly pulled out.
[Brief description of the drawings]
FIG. 1 is a longitudinal sectional view showing an insertion operation stage of a bearing pulling jig according to an embodiment of the present invention.
FIG. 2 is a plan view in which an engagement hook member of the bearing pulling jig shown in FIG. 1 is omitted.
3 is an enlarged perspective view showing an engaging hook member constituting the bearing pulling jig shown in FIG. 1. FIG.
FIG. 4 is a longitudinal sectional view showing a drawing operation stage of a bearing drawing jig according to an embodiment.
5 is a plan view in which an engagement hook member of the bearing pulling jig shown in FIG. 4 is omitted. FIG.
[Explanation of symbols]
1: Screw shaft member 1A: Tip surface 1B: Male thread portion 1C: Tool hook portion 2: Inner adapter member 2A: Female thread portion 2B: Guide portion 2C: Chamfered portion 2D: Exterior portion 2E: Annular groove 2F: Outer peripheral recess 3: Outer adapter member 3B: Fitting portion 3C: Inner peripheral recess 3D: Guide surface 4: Engaging hook member 5: Rotating operation member 6: Rotating operation member 7: O-ring A: Gear housing B: Bearing mounting hole B1: Step B2: Hole bottom B3: Center hole C: Outer race C1: Inner end face

Claims (4)

A jig for pulling out an outer race of a bearing press-fitted into a bearing mounting hole, a screw shaft member for pulling operation that is rotated with a tip abutting against the bottom of the bearing mounting hole, and the screw shaft An inner adapter member that is inserted into the outer race together with the screw shaft member by screwing the member through the center portion, and an inner adapter member that is concentrically mounted on the inner adapter member so as to be relatively rotatable. An outer adapter member inserted into the outer race together with the adapter member, outer peripheral recesses formed at a plurality of positions in the circumferential direction of the outer peripheral surface of the inner adapter member, and the outer adapter member facing these outer peripheral recesses the inner peripheral surface and the inner peripheral recess formed at a plurality of positions, fitted of the annular groove formed in each of the inner adapter member between the outer peripheral recesses and the respective inner circumferential recess That the fulcrum projection is formed, and a disengageable plurality of engagement hooks member is swingably held in the axial direction of the outer race to the inner adapter member to the inner end surface of the outer race by the O-ring, said On the inner peripheral surface of the outer adapter member, a guide surface that swings each engaging hook member to a position engageable with the inner end surface of the outer race is continuous with the bottom of each inner peripheral recess , along the circumferential direction . A bearing pulling jig characterized by having an arcuate cross section . A tool hook portion for rotation operation is formed at a base end portion of the screw shaft member, and a rotation operation member projects from the end surfaces of the base end portions of the inner adapter member and the outer adapter member. The bearing extraction jig according to claim 1. The rotation operation member of the inner adapter member is disposed at a position where the outer peripheral recess of the inner adapter member is clearly shown, and the rotation operation member of the outer adapter member is disposed at a position where the inner peripheral recess of the outer adapter member is clearly indicated. The bearing extraction jig according to claim 2, wherein The inner adapter member has a large-diameter guide portion that fits slidably on the inner peripheral surface of the outer race on the distal end side, and a small-diameter exterior portion that sheathes the outer adapter member on the proximal end side. The outer adapter member has a fitting portion that is slidably fitted to the inner peripheral surface of the outer race continuously from the guide portion of the inner adapter member. The bearing pulling jig according to any one of?

Images