JPH0691556A - Parts extraction tool - Google Patents

Abstract

PURPOSE:To extract various types of bearing parts from a shaft with good workability. CONSTITUTION:A cylindrical extraction tool main body 11 and a cylindrical extraction tool puller 17 are assembled together attachable/detachable respectively, while a plurality of jaws slidable in the radial direction 18 are arranged around the puller 17, which are linked with parts to be extracted, and the parts can thus be extracted by the press force of a cylinder 12. Bearing parts can be extracted in a limited space, improving the workability, and extraction tools can be provided in series.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pulling tool used when pulling out a component press-fitted on a shaft, particularly a bearing component press-fitted on a rotary shaft.

[0002]

2. Description of the Related Art Generally, bearings and their peripheral parts such as bearing stoppers, labyrinth packings,
The inner ring of the bearing, etc. may be disassembled due to maintenance or defective assembly. Generally, the shaft and its peripheral parts are shrink-fitted by shrink fitting, etc., and a large pulling force is required when disassembling. Therefore, it is necessary to pay close attention so that each component is not damaged by the pulling force of the component.

FIG. 8 is a sectional view showing an example of a conventional bearing component drawing tool, and FIG. 9 is a sectional view taken along the line GG of FIG.
Is a work (bearing part). In the figure, 1 is a work, and 1a to 1f are parts of the work. That is, 1a is a shaft, 1b is a rotary member, 1c is a bearing stopper, 1d is a bearing inner ring, 1e is an oil finger, 1
f is a male screw and 1 g is a female screw. Further, in FIGS. 8 and 9, reference numeral 2 is a two-piece split 2a, 2b used for preventing the part or scratch when the part is pulled out from the shaft 1a.
The pulling tool puller 3 is a claw for hooking on the puller, and 4 is a link erected between the claw 3 and a cylinder body 7b described later so as to be adjustable according to the size of a component to be pulled out. 6 is the connecting pin. 7 is a cylinder, 7a is a cylinder rod, 7b is a cylinder body, 8
Is a hydraulic hose, 9 is a cylinder rod 7a and a shaft 1a
It is an attachment to be brought into contact with. Reference numerals 10a and 10b denote bolts and nuts for connecting the pull-out tool pullers 2a and 2b.

Next, the operation will be described. First, the pull-out tool pullers 2a and 2b made in accordance with the groove of the bearing stopper 1c are attached, and the bolt 10a and the nut 10 are attached.
the pull-out tool pullers 2a and 2b with the bearing stopper 1
Fix at c. Next, the claw 4 is opened with the pins 5 and 6 as fulcrums, and brought into contact with the pull-out tool pullers 2a and 2b as shown in FIG. At this time, the rod 7a of the cylinder 7 is set to the stroke end in the H direction, or the pulling tool puller 2 is used.
It must be adjusted so as to abut the a and 2b, and the attachment 9 does not hit the end face of the shaft 1a. Next, oil is supplied to the cylinder 7 and the cylinder rod 7a is pushed out in the I direction. At this time, in order to maintain the state where the claw 3 is in contact with the pulling tool pullers 2a, 2b at the predetermined positions, the claw 4 Hold by hand. When the attachment 9 comes into contact with the end surface of the shaft 1a, the hand may be released from the claw 3. When oil is further supplied from this state, the cylinder rod 7a is pushed out in the I direction, and the inner ring 1d of the bearing and the bearing stopper 1c come out of the shaft 1a in order. When the drawing is finished,
The tool is removed and then the bolts 10a and nuts 10b are loosened until they can be axially removed from the bearing stopper 1c in order to remove the pull-out tool pullers 2a, 2b from the bearing stopper 1c. The extraction tool pullers 2a and 2b are removed from the bearing stopper 1c, and the extraction work is completed.

[0005]

Since the conventional part extraction tool is constructed as described above, when the extraction tool puller is mounted, the bolts and nuts must be screwed together, and if there are parts around it. It is hard to get in, so the workability is poor. In addition, when the oil is supplied to the cylinder, the extraction tool must be held by hand so as not to come off the work, and the work outside the cylinder stroke range cannot be removed. There was a point.

The present invention has been made to solve the above problems, and an object of the present invention is to obtain a component extraction tool capable of attaching a puller to a component to be extracted with good workability.

[0007]

A parts extraction tool according to the present invention is provided with a tubular extraction tool puller which can be engaged and disengaged at the tip of a cylindrical tool body containing a cylinder, and which is attached to a work. Is designed to be easily done with one touch via the claw that slides in the radial direction.

The component extraction tool according to the present invention is provided with a tubular extraction tool puller which can be engaged and disengaged at the tip of a cylindrical tool body containing a cylinder, and a work which is directly screwed into the puller. It can be easily installed with one touch.

[0009]

The pulling tool body and the pulling tool puller according to the present invention are formed in a tubular shape and are removably combined with each other, and the plurality of claws of the pulling tool puller are guided in the radial direction to move in the center direction. Forcefully contact the end faces of buds and drawn parts (workpieces).

The component extraction tool body and the extraction tool puller according to the present invention are formed in a tubular shape and are removably combined with each other, and the extraction tool puller and the work are spaced by a balde axially attached to the puller. Easy to connect without taking.

[0011]

【Example】

Example 1. An embodiment of the present invention will be described below with reference to the drawings. 1 to 4, the work 1 is the same as the conventional one. 11 is a drawing tool body, 12 is a center hole cylinder having a hole in the center, 13 is a position for screwing with a male screw 1f at the tip of the shaft 1a, and penetrating through the hole of the cylinder 7 to guide the cylinder. It is an attachment screwed with the rod 14. Reference numeral 15 is a cylinder receiving plate which is attached to the relief groove 11a at the end of the tool body 11 and receives the reaction force of the cylinder 12, 15a is a relief hole for the cylinder positioning rod 14, and 15b is a cylinder receiving plate for rotating the cylinder receiving plate. The finger hooking hole 15c is a V groove for holding the cylinder receiving plate 15 in the rotating direction by the action of the spring plunger 16a attached to the tool body side (FIG. 4). 1
A pulling tool puller 7 has a stepped groove 17a for guiding the claw 18 in the radial direction at the tip thereof, and the plurality of claws 18 abut on the end surface of the drawn component while being held in the groove.
The pawl 18 is movable in the A or B direction as shown in FIG. 2, and is positioned and held by engaging with the spring plunger 16b provided on the puller side in the conical holes 18a and 18b. Further, as shown in FIGS. 1 and 3, the pull-out tool puller 17 engages with the spring plunger 16c on the main body side so that the pull-out tool puller 17 is rotatable and positioned and locked at the tip of the pull-out tool main body 11. It has a V groove 17b. That is, when the extraction tool main body 11 and the extraction tool puller 17 are connected to each other, the cylindrical extraction tool main body is provided with a predetermined width in a radial direction and a predetermined depth at a position of equal size from the end face of the cylinder. The pulling tool puller has a groove 11b provided at the end of the pulling tool main body so that the pulling tool puller abuts against the end surface of the pulling tool and can be connected to the pulling tool puller. A portion for fitting with the diameter is provided, and after fitting as shown in FIG. 3a, they are relatively rotated with respect to each other, so that the V groove 17b and the spring plunger 16c are engaged and positioned and fixed as shown in FIG. 3b. I am trying to be connected.

Next, the operation will be described. First, the nail 18 of the pull-out tool puller 17 is pulled in the direction A by pinching the hook groove 18c with a finger, and the nail 18 is held at the position of the conical hole 18b.
In this state, pull out the puller tool 17 to the bearing stopper 1
The claw 18 is moved in the B direction until the spring plunger 16b fits into the conical hole 18a so that the claw 18 abuts the groove end surface of the bearing stopper 1c while fitting the c and the bearing inner ring 1d. Next, the attachment 13 is screwed into the screw 1f, and the cylinder positioning rod 1
Screw 4 together. Next, as shown in FIG. 3a, the extraction tool body 1
1 is inserted into the relief groove 11b of the pulling tool puller 17, and the pulling tool main body 11 is rotated and locked and fixed in the state of FIG. Next, after inserting the cylinder 12 by using the positioning rod 14 as a guide, the cylinder receiving plate 15 is inserted into the relief groove 11a as shown in FIG. 4a, and then the cylinder receiving plate is rotated to engage the state shown in FIG. 4b. Securely fix. In this state, the oil is sent to the cylinder 12 via the hydraulic hose 8 and the work 1
Press and pull out as shown in FIG. After that, the component extraction tool is sequentially removed in the reverse order, and finally the bearing stopper 1c is removed from the claw 18, and the extraction work is completed.

Example 2. In the above-mentioned embodiment, the spring plunger is used for positioning and holding the claw 18, but the pulling tool puller 17 or the claw 18 may be provided with a contact surface to serve as a stopper. Further, a tightening screw may be provided instead of the spring plunger for tightening. Further, although the cylinder is a center hole cylinder, it may be a solid cylinder. Further, the hole into which the spring plunger is fitted may be a V groove, a conical hole, a cylindrical hole, or a parallel groove.
Although the guide groove of the claw 18 is a square groove, it may be a round groove or a round hole. Further, the extraction tool main body and the extraction tool puller may be a structure in which a peep hole and a weight reduction hole are appropriately provided so that the extraction point can be visually recognized or in order to reduce the weight and reinforcement is put. In the above embodiment,
Although the number of the claws 18 is four, it may be any number.
Further, in the above embodiment, the extraction tool main body 11 and the extraction tool puller 17 are connected by the stepped groove, but any of the following may be used. (1) Screw fitting. (2) Insert pins, keys, etc. from the outside. (3) Tighten with bolts, aligning the end face flange faces. (4) Align the end faces with the flanges and tighten with the hinge bolts. (5) Connect using the T-groove provided on the end face flange surface. In the above embodiment, the bearing inner ring 1d and the bearing stopper 1c are pulled out at the same time, but the shape of the bearing stopper is changed so that the claw 18 can be brought into contact with the end surface of the bearing inner ring 1d and the bearings can be pulled one by one. You may choose to remove it.

Example 3. Further, in the above-described embodiment, the groove of the bearing stopper 1c is used as the portion for transmitting the pulling force, but the shape of the pulling tool puller 17 is changed as shown in FIGS. The hole 19 may be used, and the bolt may be screwed into the hole 19 from the puller side.

[0015]

As described above, according to the present invention, the extraction tool puller can be linked to the parts to be extracted with good workability without taking up a space, so that the extraction work can be made efficient.

[Brief description of drawings]

1A and 1B are a plan view a and a view F taken along arrow F showing a component extracting tool according to an embodiment of the present invention.

FIG. 2 is an end view taken along the line EE of FIG.

FIG. 3 is a sectional view taken along line CC of FIG. 1 and an operation diagram b.

FIG. 4 is a view as seen from an arrow D in FIG. 1 and an operation diagram b.

5 is a drawing showing the completion of pulling out of FIG.

FIG. 6 is a plan view showing a component extracting tool according to another embodiment of the present invention.

FIG. 7 is a drawing showing the completion of extraction of FIG. 6;

FIG. 8 is a plan view showing a conventional bearing component extracting tool.

9 is a sectional view taken along the line GG in FIG.

FIG. 10 is a sectional view of a bearing component (workpiece).

[Explanation of symbols]

 1 Work 1a Shaft 1b Rotating body part 1c Bearing stopper 1d Bearing inner ring 1e Oil finger 1f Screw 11 Extraction tool body 11a, 11b Relief groove 12 Center hole cylinder 13 Attachment 14 Guide rod 15 Cylinder receiving plate 16a, 16b, 16c Spring plunger 17 Extraction Tool puller 18 Claws 18a, 18b Conical hole 19 Screw hole 20 Bolt

Claims (5)

[Claims] 1. A pull-out tool for pulling out a part press-fitted into a shaft, a cylinder that functions to abut against the end face of the shaft and push out the same, a tubular pull-out tool main body containing the cylinder, Equipped with a cylindrical pull-out tool puller that is detachably connected to the tip of the pull-out tool body, and engages with parts to be pulled out from the shaft at multiple locations on the circumference of this pull-out tool puller, and can slide in the radial direction. Part extraction tool equipped with various claws. 2. The component extraction tool according to claim 1, further comprising a plurality of claws around the tip of the extraction tool puller, which can be slidably adjusted by a positioning mechanism by engagement of a spring plunger and a groove. 3. A pulling tool for pulling out a component press-fitted into a shaft, a cylinder that functions to abut against an end face of the shaft and push out the same, a tubular pulling tool body including the cylinder, A parts pulling tool that is equipped with a tubular pulling tool puller that is detachably connected to the tip of the pulling tool body, and that connects the pulling tool puller and the part to be pulled out with a plurality of bolts. 4. The component extracting tool according to claim 1, further comprising a guide rod mounted by screwing with a screw provided at an end of the shaft, and a center hole cylinder through which the guide rod penetrates. 5. The pulling tool main body and the pulling tool puller are engaged with each other so as to be rotatable relative to each other, and the engagement between a spring plunger provided on the pulling tool body side and a groove provided on the pulling tool puller side. The component extraction tool according to any one of claims 1 to 4, wherein the component extraction tool is positioned according to the combination.