JP2605879Y2 - Bearing attachment / detachment device - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bearing attachment / detachment device for attaching / detaching a bearing fitted to a roller neck or a bearing housing.

[0002]

2. Description of the Related Art As the above-mentioned bearing attaching / detaching device, for example, the one shown in FIG. 5 is conventionally known. In this bearing attaching / detaching device 10, when the bearing 14 fitted in the bearing housing 12 is extracted, the slide tongue 18 is pulled out from the lower extraction plate 16 with the thumb screw 20 to support the bottom surface of the bearing 14, and the slide tongue 18 and the push plate 22 Then, the bearing 14 is sandwiched by the above and the mandrel 24 is pulled up using the wire 26, whereby the bearing 14 is removed. The height of the bearing 14 is, for example, 1170
mm, it is too high to reach the thumbscrew 20 and the slide tongue 18 cannot be pulled out unless an unreasonable posture is taken.
In addition, even if a jig or the like is used, it takes too much man-hour.

When a plurality of bearings 14 are fitted into the bearing housing 12, the bearing mounting / detaching device 10 is fitted one by one due to the structure thereof. Therefore, in order to quickly perform the fitting operation of the bearing 14, a method of using the "lever" bar 28 and using the "lever" bar 28 to lower the bearing 14 as shown in FIG. 6 can be considered. This method is dangerous because the lever 28 may come off.

A device utilizing a hydraulic cylinder is known as a bearing extracting device (Japanese Patent Application Laid-Open No. 63-2166).
No. 83 publication). This bearing removal device is configured to remove the bearing safely and quickly using a hydraulic cylinder, but the device is large-scale because it uses a hydraulic cylinder, and it is used for fitting work of the bearing. There is a problem that can not be.

[0005] Further, as another bearing attaching / detaching device,
A device for lifting a roll bearing by disposing a columnar fixing jig and a columnar movable jig each having a suspending pin provided at a lower end thereof facing each other, and bringing these two jigs close to each other using a spring. Known (Japanese Utility Model Application Hei 4-221)
No. 03). There is a problem that this device has a very complicated configuration.

[0006]

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and has as its object to provide a bearing attaching / detaching apparatus having a relatively simple structure with high safety and high working efficiency.

[0007]

In order to achieve the above object, the present invention provides a bearing mounting / removing device having a plurality of radially extending arms, an upper plate having a centrally formed through hole, and a through hole. A mandrel movably penetrating the hole, and an upper end portion is hung at the tip end of the arm and has a projection protruding outward at a lower end portion, and the lower end portion is closer to the mandrel than the upper end portion. A movable claw having a tapered portion inclined away from the mandrel formed on a surface facing the mandrel; and a rotatably mounted lower end of the mandrel, facing the movable claw.
A lower plate having an uneven portion, and the convex portion or the concave portion
Lower plate to rotate the lower plate to a position facing the
And a jig .

[0008]

[Function] The bearing attachment / detachment device of the present invention is inserted into the bearing so that the projection at the lower end of the movable claw is lower than the bottom surface of the bearing, and when the mandrel is raised, the lower plate is also raised and the taper of the movable claw is raised. Touch the part. When the mandrel is further raised, the lower plate is opened by pressing the movable pawl outward, and the projection at the lower end and the bottom surface are engaged. When the mandrel is further raised, the bearing is lifted while the projection on the lower end and the bottom surface remain engaged. Thus, the bearing fitted in the bearing housing or the like can be removed.
When the bearing is fitted into the bearing housing or the like, the raised bearing is fitted into the bearing housing while the projection at the lower end and the bottom surface remain engaged, and the mandrel is lowered. As the mandrel is lowered, the lower plate separates from the movable claw, the movable claw closes, and the engagement between the projection at the lower end and the bottom surface is released. After the engagement is released, the mandrel is lifted so that the lower plate and the movable pawl do not come into contact with each other, and the bearing attaching / detaching device is removed from the bearing. Thus, the bearing can be fitted into the bearing housing or the like.

[0009]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a bearing mounting / dismounting device according to an embodiment of the present invention; FIG. 1 is a perspective view showing a bearing attaching / detaching device, showing two arms of three arms and one movable claw of three movable claws.
2 and 3 are views showing components of the bearing attaching / detaching device.

The bearing attachment / detachment device 30 includes an upper plate 40 having three arms 44 extending radially, and a through hole 42 is formed in the center of the upper plate 40. A mandrel 50 is movably penetrated through the through hole 42 of the upper plate 40, and a lower plate 60 having three radially extending arms 62 is attached to the lower end of the mandrel 50. The lower plate 60 contacts the tapered portion 74.
And a concave portion that does not contact the outer periphery.
A movable claw 70 is suspended from the tip of each arm 44, and a projection 72 protruding outward is formed at the lower end of the movable claw 70. The movable claw 70 is the arm 44
A tapered portion 74 is formed on a surface facing the mandrel 50 in a state of being suspended at the tip of the mandrel so that the lower end portion is more distant from the mandrel than the upper end portion. A spring 7 is provided between the upper end of the movable claw 70 and the center of the lower surface of the arm 44.
6 to prevent unnecessary movement of the movable claw 70 and to facilitate insertion of the movable claw 70 into the bearing. A rod 78 and a bolt 79 for manually moving the movable claw 70 are attached to the upper end surface of the movable claw 70. Further, the mandrel 50 is rotated to lower the lower plate 6.
A lower plate aligning jig 80 for attaching the 0 arm 62 to the tapered portion 74 of the movable claw 70 is attached to the lower plate 60. Further, the upper end of the mandrel 50 has a wire 9
0 (see FIG. 4) is provided with a ring 52. The lower plate matching jig 80 is attached to the lower plate 60.
A wire whose lower end is locked is passed through the upper plate 40.
The lower plate 60 is turned by pulling up the wire.
The convex portion or the concave portion at a position facing the tapered portion.
It is to match. In other words, choke the bearing
When raising the mandrel 50 to pull out,
The bearing according to the present invention is attached and detached by contacting the taper portion 74.
Raise the mandrel 50 to remove the device itself from the bearings
The movable claw 70 should not contact the lower plate 60
Then, the concave portion is made to face the tapered portion 74.

Next, the operation of the bearing attaching / detaching device will be described with reference to FIG. The bearing attachment / detachment device 30 is
Is inserted into the bearing so that the projection 72 at the lower end is lower than the bottom surface of the bearing (not shown). When the mandrel 50 is raised by a crane or the like, the lower plate 60 is raised and comes into contact with the tapered portion 74 of the movable claw 70. When the mandrel 50 is further raised, the lower plate 60 presses the movable claw 70 outward to open (see FIG. 4B), and the lower end projection 72 engages with the bottom surface of the bearing. When the mandrel 50 is further raised, the bearing is lifted while the projection 72 at the lower end and the bottom surface of the bearing remain engaged. Thereby, the bearing fitted in the bearing housing or the like (not shown) can be removed. When the bearing is fitted into a bearing housing or the like, the protrusion 72 at the lower end is used.
The bearing which has been lifted with the bottom surface of the bearing engaged with the bearing is fitted into the bearing housing,
Lower mandrel 50. As the mandrel 50 is lowered, the lower plate 6
0 is separated from the movable claw 70, the movable claw 70 is closed, and the engagement between the projection 72 at the lower end and the bottom surface of the bearing is released. After the engagement is released, the lower plate 60 is rotated by the lower plate aligning jig 80 so that the movable claw 70 and the lower plate 60 do not come into contact with each other, the mandrel 50 is raised, and the bearing attaching / detaching device 30 is removed from the bearing. Remove it. Thus, the bearing can be fitted into the bearing housing or the like.

As described above, in the bearing attachment / detachment device 30, when the mandrel 50 is moved up and down, the movable claw 70 opens and closes, and the bearing is lifted and removed. Freely movable claw 70
Can be opened and closed, so that the bearing can be attached and detached with one touch without touching the bearing attaching / detaching device 30 or the bearing. Further, since the degree of opening and closing of the movable claw 70 is adjusted by sliding the arm 62 to the tapered portion 74, the present invention can be applied to a bearing having a similar size to some extent. Further, since the mandrel 50 is raised and lowered, the number of operating elements is extremely small, and safety, work efficiency, and speedup can be improved. Furthermore, when handling a roller pin type bearing having a suspension hole, the operation can be performed more easily than in the conventional arrangement. In the case of an extremely large bearing, it is possible to sufficiently cope with it by enlarging the jig.

[0013]

[Effects of the Invention] As described above, according to the bearing attaching / detaching device of the present invention, the bearing can be removed from the bearing housing by raising and lowering the mandrel, and can be fitted into the bearing housing without directly touching the bearing. Work can be done easily and safely with few operations. In addition, the cause of oil stains on work clothes and gloves is eliminated, and the effect on safety and health is great.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a bearing attaching / detaching device of the present invention.

FIG. 2 shows the bearing attaching / detaching device shown in FIG. 1;
(A) is a plan view of a lower plate, and (b) is a plan view of an upper plate.

FIG. 3 shows the bearing attaching / detaching device shown in FIG. 1;
(A) is a side view of a mandrel, (b) is a side view of a movable claw.

FIG. 4 is a schematic view showing the operation of the bearing attaching / detaching device.

FIG. 5 is an explanatory view showing a conventional bearing attaching / detaching device.

FIG. 6 is an explanatory view showing a conventional bearing fitting operation.

[Explanation of symbols]

 Reference Signs List 30 Bearing attaching / detaching device 40 Upper plate 42 Through hole 44 Arm 50 Mandrel 60 Lower plate 70 Movable claw 72 Projection 74 Tapered part

──────────────────────────────────────────────────続 き Continuation of the front page (56) References Japanese Utility Model Showa 48-113163 (JP, U) Japanese Utility Model Showa 55-169374 (JP, U) Japanese Utility Model Showa 56-42878 (JP, U) Japanese Utility Model Showa 50- 32698 (JP, U) (58) Fields surveyed (Int. Cl. ⁷ , DB name) B25B 27/06-27/073

Claims (1)

(57) [Scope of request for utility model registration] 1. An upper plate having a plurality of radially extending arms, a through hole formed in a central portion, a mandrel movably penetrating the through hole, and an upper end portion provided at a tip end of the arm. A movable claw that is suspended and has a protrusion protruding outward at a lower end thereof, and a tapered portion inclined so that the lower end is separated from the mandrel than the upper end is formed on a surface facing the mandrel. And the movable claw is rotatably attached to a lower end of the mandrel,
A lower plate having an uneven portion toward the lower portion, and the lower portion being located at a position facing the tapered portion with the convex or concave portion.
A bearing attaching / detaching device comprising a lower plate aligning jig for rotating a part plate .