JP3686192B2 - Ring disassembly device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a ring disassembling apparatus for disassembling and removing a ring fitted to a shaft by shrink fitting or the like from the shaft.
[0002]
[Prior art]
When removing the ring fitted to the shaft by shrink fitting or the like from the shaft, conventionally, as shown in FIG. 7, the end mill 101 is used to cut the ring 2 along the axial direction and remove it from the shaft 1, As shown in FIG. 8, the ring 2 is melted and cut along the axial direction by the gas burner 102 and removed from the shaft 1.
[0003]
[Problems to be solved by the invention]
However, when the ring 2 is removed from the shaft 1 as described above, there are the following problems.
(A) When an end mill is used (1) When the ring 2 is divided by cutting, the outer peripheral surface of the shaft 1 may be damaged. (2) Since the processing device is large, it is inconvenient to handle.
(B) When a gas burner is used (1) When the ring 2 is melted and cut, the outer peripheral surface of the shaft 1 may be damaged. {Circle around (2)} Excessive heat is applied to the members around the ring 2 including the shaft 1, which adversely affects these members.
[0004]
Accordingly, an object of the present invention is to provide a ring disassembling apparatus that can easily remove a ring from a shaft without damaging the shaft or adversely affecting the shaft and peripheral members due to heat. did.
[0005]
[Means for Solving the Problems]
A ring disassembling apparatus according to the present invention for solving the above-described problem is a ring disassembling apparatus that disassembles a ring fitted to a shaft and removes the ring from the shaft,
Expansion means that is inserted into a groove formed in advance along the axial direction on the outer peripheral surface of the ring and presses and expands the groove;
And pressing means for pressing the expansion means.
[0006]
In the ring disassembly device described above,
The expansion means has a tapered hole on the inside, and an expansion / contraction body that can expand along the radial direction of the hole;
A wedge body inserted into the hole of the expansion / contraction body, and having a tapered outer surface;
The pressing means is a gantry;
A hook that is attached to the base and hooks the base on the shaft;
It is provided with the biasing means provided on the said base, and biasing the said wedge main body toward the axial center direction of the said axis | shaft.
[0007]
In the ring disassembly apparatus described above, the frictional resistance on the outer surface side of the expansion / contraction body is large.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
An embodiment of a ring disassembling apparatus according to the present invention will be described with reference to FIGS. 1 is a partially broken view showing the schematic structure, FIG. 2 is a view seen from the direction of arrow II in FIG. 1, and FIG. 3 is an extracted enlarged cross-sectional view of FIG. 4 is an explanatory diagram of pre-processing of the ring, FIG. 5 is an external view of the ring from the direction of arrow V in FIG. 4, and FIG. 6 is an external view of the ring from the direction of arrow VI in FIG.
[0009]
In FIGS. 1 and 2, reference numeral 20 denotes a wedge tool pressing device that is a pressing means, and the wedge tool pressing device 20 includes a base 21, a hooking tool 22, and a hydraulic ram 23 that is an urging means. Yes.
[0010]
The hooks 22 are respectively provided on both ends of the gantry 21, can hook the gantry 21 on the shaft 1, and can adjust the length according to the distance between the gantry 21 and the shaft 1. It is like that.
The upper part of the hydraulic ram 23 can be moved up and down. The hydraulic ram 23 is provided on both ends of the upper surface of the gantry 21, and the position on the gantry 21 is set according to the length of the ring 2 in the axial direction. Can be done.
[0011]
1 and 2, reference numeral 10 denotes a wedge tool which is an expansion means. The wedge tool 10 includes a wedge main body 11, an expansion / contraction body 12, a mating pin 13, and a holding ring 14 as shown in FIG. It is equipped with.
[0012]
The wedge main body 11 has a tapered outer peripheral surface and a flat tip end.
The expansion / contraction body 12 has a cylindrical shape having a tapered hole inside thereof, and is composed of half cylinders 12a and 12b which are paired so as to be divided into two along the axial direction.
The coupling pin 13 is loosely fitted to the end portion on the small inner diameter side of the expansion / contraction body 12 so as to connect the half cylinders 12a, 12b of the expansion / contraction body 12, and the half cylinders 12a, 12b of the expansion / contraction body 12 are The half cylinders 12a and 12b are supported so that they can move toward and away from each other along the radial direction.
The holding ring 14 is made of an elastic material having a high frictional resistance such as rubber and is fitted into the outer peripheral surface of the expansion / contraction body 12 along the axial direction to increase the frictional resistance on the outer peripheral surface side of the contraction body 12. At the same time, the semi-cylindrical bodies 12a, 12b of the expansion / contraction body 12 are prevented from coming off from the mating pins 13.
[0013]
That is, when the wedge main body 11 is inserted into the expansion / contraction body 12, the wedge 10 is separated from the half cylinders 12 a, 12 b in the radial direction of the expansion / contraction body 12, and the expansion / contraction body 12 expands. -ing
[0014]
Next, a case where the ring fitted to the shaft by shrink fitting or the like is removed from the shaft by such a ring disassembling apparatus will be described.
[0015]
First, as a pretreatment, as shown in FIGS. 4 to 6, a hole extending from the outer peripheral surface of the ring 2 to the vicinity of the inner peripheral surface (about 1 to 2 mm from the inner peripheral surface) by the drilling device 30 as the groove forming means. When the groove 2b is formed along the axial direction on the lower side of the outer peripheral surface of the ring 2 by forming 2a on the lower side of the ring 2 over the entire length in the axial direction, the shaft 1 is rotated 180 degrees in the circumferential direction. Then, a groove 2b is further formed in the ring 2 in the same manner as described above.
[0016]
Next, the axially central ends of the grooves 2b located on the lower side of the ring 2 so that the mating surfaces of the half cylinders 12a, 12b of the expanded diameter cylinder 12 of the wedge tool 10 are along the axial direction of the shaft 1. When the diameter expansion cylinder 12 is inserted into each of the plurality of holes 2a (three in the present embodiment) and the wedge main body 11 is inserted into the expansion / contraction body 12, the expansion / contraction body 12 expands and the holding ring 14 becomes the ring 2 The wedge tool 10 is temporarily fixed in the hole 2 a of the ring 2 by being pressed by the inner peripheral surface of the hole 2 a.
[0017]
Subsequently, the hook 2 is hooked on the shaft 1, the hydraulic ram 23 is positioned below the wedge tool 10, the hydraulic ram 23 is raised, and the wedge main body 11 of the wedge tool 10 is further pushed into the expansion / contraction body 12. Then, the expansion / contraction body 12 is further enlarged, the width of the groove 2b on the lower side of the ring 2 is expanded, and the lower side of the ring 2 is axially oriented so that the groove 2b communicates with the inner peripheral surface of the ring 2 Break along.
[0018]
When the lower side of the ring 2 is divided along the axial direction in this manner, the hooking tool 22 is once removed from the shaft 1, and the shaft 1 is rotated 180 degrees to be newly positioned below in the groove 2b in the same manner as described above. When the wedge tool 10 is inserted and the hook 22 is again hooked on the shaft 1 to raise the hydraulic ram 23, the groove 2b of the ring 2 newly positioned below is broken in the same manner as described above, and the ring 2 is divided into two. To come off the shaft 1.
[0019]
Therefore, the ring 2 can be easily removed from the shaft 1 without damaging the shaft 1.
Further, since no heat load is applied to the shaft 1 or the like, no adverse effect due to heat is exerted on the shaft 1 or the like.
Moreover, since the wedge tool pressing device 20 and the drilling device 30 can be easily reduced in size and weight, the work for disassembling and removing the ring 2 can be easily performed.
[0020]
In addition, since the retaining ring 14 having a high frictional resistance is fitted to the outer peripheral surface of the expansion / contraction body 12, the wedge main body 11 remains in the expansion / contraction body 12 even when the expansion / contraction body 12 is inserted into the hole 2 a located below the ring 2. Since the expansion / contraction body 12 can be prevented from dropping simply by being manually inserted into the armature, the wedge tool pressing device 20 can be easily set and the work can be performed efficiently.
[0021]
【The invention's effect】
According to the ring disassembling apparatus of the present invention, it is possible to easily remove the ring from the shaft without damaging the shaft or the like or causing an adverse effect due to heat.
[Brief description of the drawings]
FIG. 1 is a partially cutaway view showing a schematic structure of an embodiment of a ring disassembling apparatus according to the present invention.
FIG. 2 is a view as seen from the direction of arrow II in FIG.
3 is an extracted enlarged cross-sectional view taken along a line III in FIG.
FIG. 4 is an explanatory diagram of ring pre-processing.
5 is an external view of the ring from the direction of arrow V in FIG. 4;
6 is an external view of the ring from the direction of arrow VI in FIG.
FIG. 7 is an explanatory view of a conventional example when a ring fitted to a shaft is removed.
FIG. 8 is an explanatory view of another conventional example when removing a ring fitted to a shaft.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Axis 2 Ring 2a Hole 2b Groove 10 Wedge tool 11 Wedge main body 12 Expansion body 14 Holding ring 20 Wedge tool pressing device 21 Base 22 Hook 23 Hydraulic ram 30 Drilling device

Claims (3)

A ring disassembling device that disassembles a ring fitted to a shaft and removes it from the shaft,
Expansion means that is inserted into a groove formed in advance along the axial direction on the outer peripheral surface of the ring and presses and expands the groove;
A ring disassembling apparatus comprising: pressing means for pressing the expansion means. The expansion means has a tapered hole on the inside, and an expansion / contraction body that can expand along the radial direction of the hole;
A wedge body inserted into the hole of the expansion / contraction body, and having a tapered outer surface;
The pressing means is a gantry;
A hook that is attached to the base and hooks the base on the shaft;
The ring disassembling apparatus according to claim 1, further comprising: an urging unit that is provided on the gantry and urges the wedge main body toward the axial direction of the shaft. The ring disassembling apparatus according to claim 2, wherein a frictional resistance on an outer surface side of the expansion / contraction body is large.

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