JP3713311B2 - Magnet generator rotor and rotor extraction tool - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a rotor and a rotor extraction tool for a magnet generator used in an ignition device for an internal combustion engine.
[0002]
[Prior art]
Conventionally, when removing the rotor of a magnet generator from the crankshaft of an engine, a pulley extraction tool used to extract a pulley fitted to the rotation shaft has been used.
[0003]
FIG. 10 shows such a conventional pulley extraction tool and a rotor of a magnet generator extracted thereby. In FIG. 10, reference numeral 21 denotes an engine crankshaft. The crankshaft 21 has magnets, magnetic poles, balance weights and the like. And the shaft hole 23 of the rotor 22 shape | molded by the nonmagnetic material at the substantially disk shape is inserted.
[0004]
The rotor 22 is fixed by a nut 32 screwed to a male threaded portion 24 formed at the end of the crankshaft 21 so that it cannot be freely removed. Reference numeral 25 denotes a plurality of cooling fans provided on one side of the rotor 22 so as to project along the circumferential direction.
[0005]
On the other hand, 26 is a bolt mounting member in which a bolt 27 is screwed to the center, and two arms 28 and 29 are connected to both ends of the bolt mounting member via pivots 30 and 31, respectively. A locking claw 29 a is integrally provided at the tip of 29.
[0006]
In this pulley extraction tool, first, the locking claws 29a at the ends of the arms 29 are locked to the inner surface of the outer peripheral portion of the rotor 22 inserted into the crankshaft 21, as shown in the figure, The tip is bumped against the tip surface of the crankshaft 21.
[0007]
Note that the nut 32 is removed from the female thread portion 24 before and after such work, and then the bolt 27 is screwed into the bolt mounting member 26. As a result, the arms 28 and 29 are displaced about the support shafts 30 and 31 in response to the axial torque due to the screwing force, and the rotor 22 held by the locking claws 29a is extracted from the crankshaft 21 in the axial direction. .
[0008]
FIG. 11 shows a conventional rotor extraction tool and a magnet generator rotor extracted thereby. In the figure, reference numeral 35 denotes a plurality of screw holes provided in the rotor 22 so as to penetrate both side surfaces thereof.
[0009]
Reference numerals 36 denote male screws whose tips are screwed into the screw holes 35. The male screws 36 are respectively inserted into insertion holes 38 provided in the plate 37, and are prevented from being detached by screw heads 36a of the male screws 36.
[0010]
Bolts 27 are screwed into the central portion of the plate 37, and the tip portion of the plate 37 can hit the tip surface of the crankshaft 21.
[0011]
In this extraction tool, the front end portion of the male screw 36 is screwed to the depth in the screw hole 35, and then the bolt 27 is screwed into the plate 37, and the front end of the bolt 27 hits the end surface of the crankshaft 21.
[0012]
Then, the bolts 27 are further screwed in with the plate 37 kept parallel to the rotor 22. By doing so, the plate 37 is given a force to pull it from the crankshaft 21 to the rotor 22 via the male screw 36. For this reason, the rotor 22 is smoothly extracted from the crankshaft 21.
[0013]
[Problems to be solved by the invention]
However, when the rotor is extracted using the general-purpose pulley extraction tool shown in FIG. 10, it is necessary to lock the locking claw 29 a along the outer peripheral surface of the rotor 22. However, it is difficult to secure a space for guiding the engaging claws 29a on the outer periphery of the rotor 22, and eventually there is a problem that such a pulley removing tool cannot be put into practical use.
[0014]
In addition, when the extraction tool shown in FIG. 11 is used, it is necessary to additionally process the screw hole 35 in the post-process with respect to the rotor obtained by molding, so that the rotor can not be machined. There was a problem that the efficiency was reduced and the cost was increased.
[0015]
The present invention has been made to solve the above-described problems, and can be extracted from a crankshaft by an extraction tool very easily and reliably without additional processing such as drilling a screw hole. The purpose is to obtain a magnet generator rotor that can be used.
[0016]
In addition, the present invention provides a rotor removal tool for a magnet generator that can reliably remove a rotor from a crankshaft even if a sufficient working space is not obtained around the rotor, and by extremely simple work and operation. The purpose is to obtain.
[0017]
A further object of the present invention is to provide a rotor removal tool for a magnet generator that allows a rotor to be quickly pulled out from a crankshaft by a simple engagement / disengagement operation with respect to a pull-out through-hole of a pull-out member. To do.
[0018]
[Means for Solving the Problems]
The rotor of the magneto generator according to a first aspect of the invention, a plurality of extraction which is inserted the rotary element is withdrawal member of extraction tool for extracting from the crankshaft, and said removal member is engaged with the peripheral portion Through-holes are provided at opposite positions across the shaft hole of the rotor , the engagement operation to the periphery following the insertion of the extraction tool into the extraction through-hole, and the extraction tool extraction operation Thus, the rotor can be pulled out from the crankshaft.
[0019]
According to a second aspect of the present invention, there is provided a magnet generator rotor extraction tool that passes through a plate disposed opposite to a rotor of a magnet generator in which a shaft hole is inserted into a crankshaft of an engine, and a central portion of the plate. a screw member in the screwed in the distal end portion is brought into contact with the crank shaft end as in sandwiched position facing the screw member of said plate, of the attached plurality of such rear end is retained and withdrawal member are formed on the tip of the removal member, before Symbol inserted into a plurality of extraction through-hole provided to sandwich the shaft hole of the rotor, and is engaged with the through-hole peripheral portion for the withdrawal An engagement member is formed, and by inserting the tip of the extraction member into the extraction through-hole of the rotor and performing sliding and rotation operations, the extraction member is disposed around the extraction through-hole. Hook the engagement member A linear torque generated by the screwing operation of the screw member via the engaging member by applying between the rotor and the crankshaft, and the rotor so Nukitoreru from the crank shaft.
[0020]
According to a third aspect of the present invention, there is provided a rotor removal tool for a magnet generator in which an engagement protrusion that can be engaged with a peripheral portion of a rotor extraction through-hole by a rotation operation is provided at a distal end portion of a pull-out member. In this engaged state, the rotor is pulled out from the crankshaft by pulling up the pullout member by screwing the screw member through the plate.
[0021]
According to a fourth aspect of the present invention, there is provided a rotor removal tool for a magnet generator, wherein an engagement protrusion that can be engaged with a peripheral portion of a rotor through-hole by a linear movement operation is provided at a distal end portion of a pull-out member. In this engaged state, the rotor is pulled out from the crankshaft by pulling up the pullout member by screwing the screw member through the plate.
[0022]
According to a fifth aspect of the present invention, there is provided a magnet generator rotor extraction tool for extracting an engaging projection that can be engaged with a peripheral portion of a rotor through-hole by a rotating operation of a plate on which an extraction member is mounted. It is provided at the tip of the member, and in this engaged state, the pulling member is pulled up by screwing the screw member through the plate, thereby enabling the rotor to be pulled out from the crankshaft.
[0023]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to the drawings. In FIG. 1, reference numeral 1 denotes a rotor, which has a shaft hole 2 that is fitted into a crankshaft of an engine at the center thereof. The shaft hole 2 is formed in a tapered shape as necessary.
[0024]
The rotor has a pole piece portion (not shown) composed of a magnet and a magnetic pole and a balance weight (not shown) at opposed positions (opposite positions of 180 ° to each other) on the outer periphery with the shaft hole 2 in between.
[0025]
Reference numeral 3 denotes extraction through-holes that are formed through a plurality of locations across the shaft hole 2 of the rotor 1 and in two locations in the illustrated embodiment . The extraction through-hole 3 includes an insertion hole 3a through which a rod-like extraction member, which is a part of an extraction tool described later, can be inserted, and an engagement pin that is connected to the extraction member continuously from the insertion hole 3a. Is formed of a pin insertion hole 3b through which can be inserted. In addition, 3c is a cooling fan and is arrange | positioned at equal intervals like illustration.
[0026]
FIG. 2 shows the extraction tool for extracting the rotor 1 from the crankshaft and its extraction structure. In the figure, reference numeral 5 denotes a crankshaft into which the shaft hole 2 of the rotor 1 is inserted.
[0027]
A nut 6 is fastened to the male screw 5 a at the tip of the crankshaft 5 so that the rotor 1 is not easily detached from the crankshaft 5. The nut 6 is removed during the extraction operation.
[0028]
Reference numeral 7 denotes, for example, a disk-shaped plate that serves as a support for the extraction tool H, and a screw member 8 such as a bolt whose tip is in contact with the end surface of the crankshaft 5 is provided at the center of the plate 7. Further, through holes 9 are provided at a plurality of positions of the plate 7 facing each other across the screw member 8 .
[0029]
Reference numeral 10 denotes an extraction member of the extraction tool H inserted through the through holes 9, and a head 11 for retaining is provided at one end thereof, and an engagement pin as an engagement member is provided at the other end. 12 is protrudingly provided.
[0030]
Note that the diameter of the other end of the extraction member 10 is slightly smaller than the insertion hole 3a of the extraction through-hole 3 shown in FIG. 1, and the engagement pin 12 can be freely inserted through the pin insertion hole 3b. Although it has a length, it extends to the outside of the diameter of the insertion hole 3a in a region other than the pin insertion portion 3b.
[0031]
Therefore, in the rotor extraction tool H having such a configuration, when the rotor 1 is extracted from the crankshaft 5, first, the other end of each extraction member 10 is inserted into the extraction through hole 3 as shown in FIG. Insert in arrow direction A.
[0032]
This insertion is performed by inserting the extraction member 10 itself into the insertion hole 3a and the engaging pin 12 into the pin insertion hole 3b of the extraction through hole 3, respectively.
[0033]
Next, after this insertion, each extraction member 10 itself is rotated in the through hole 9 by an angle of, for example, 90 ° in the arrow direction B. As a result, each engagement pin 12 reaches the periphery of the insertion hole 3a on the back surface of the rotor 1, and when the screw member 8 is screwed into the plate 7 in this state, the engagement pin 12 becomes the periphery of the insertion hole 3a. It contacts the back surface of the rotor 1.
[0034]
Further, by the subsequent screwing of the screw member 8, the tip portion of the screw member 8 comes into contact with the tip surface of the crankshaft 5, and then the plate 7 is directed in the direction opposite to the side where the crankshaft 5 is located (right side in FIG. 2). Moving.
[0035]
For this reason, the engaging pin 12 at the end of the pulling member 10 locked to the plate 7 urges the rotor 1 in the pulling direction (rightward in FIG. 2) from the back side, and the rotor 1 is pulled greatly. The torque is smoothly extracted from the crankshaft 5.
[0036]
4 and 5 show another embodiment of the present invention. In this embodiment , a plurality (two in this case) of rectangular extraction through holes 15 are formed at opposite positions across the shaft hole 2 of the rotor 1 , and with respect to the extraction through holes 15. The hook portion 17 as an engaging member at the end of the pulling member 16 attached to the plate 7 so as to be linearly movable along the surface thereof can be inserted.
[0037]
Therefore, in this embodiment, after inserting the hook portion 17 at the end of the extraction member 16 into the through hole 15 in the arrow direction C as described above, the extraction member 16 on the plate 7 as shown in FIG. By linearly moving in the arrow direction D, the hook portion 17 can be positioned on the back surface of the rotor 1 as shown in FIG. Then, the rotor 1 can be extracted in the same manner as described above by screwing the screw member 8.
[0038]
7 and 8 show another embodiment of the present invention. In this embodiment , a plurality (two in this case) of substantially L-shaped extraction through holes 18 are formed at opposite positions across the shaft hole 2 of the rotor 1, and the extraction through holes 18 are formed. On the other hand, the hook portion 20 can be inserted as an engaging member at the end of the pulling member 19 attached to the plate 7.
[0039]
Each extraction through-hole 18 is composed of a circumferential hole 18 a along the circumferential direction of the rotor 1 and a radial hole 18 b extending in the radial direction of the rotor 1.
[0040]
Therefore, in this embodiment, after inserting the hook portion 20 of the extraction member 19 supported by the plate 7 into the radial hole 18b of the extraction through-hole 18 in the arrow direction E, as shown in FIG. The plate 7 is rotated in the arrow direction F by a slight angle.
[0041]
Thus, after the hook portion 20 is positioned on the back surface of the rotor 1 around the circumferential hole 18a, the screw portion 8 is screwed into the hook portion 20 as shown in FIG. The rotor 1 can be latched, and the rotor 1 can be removed in the same manner as described above by screwing the screw member 8 into the following.
[0042]
In this case, the hook portion 20 can be positioned on the back surface of the rotor 1 also by moving the extraction member 19 itself into the radial hole 18b and moving it horizontally without rotating the plate 7. Therefore, the rotor 1 can be extracted as described above.
[0043]
It should be noted that not only the locking pins 12 and the hooks 17 and 20 provided at the ends of the extraction members 10, 16 and 19, but also any other protrusions can be used instead to extract the same rotor 1. It goes without saying that it can be done.
[0044]
As described above, according to the invention of claim 1, the rotating element, a plurality of withdrawal member of extraction tool for extracting the rotational element from the crankshaft is inserted, a peripheral portion is engaged with the pulling member since the extraction through hole have configured, very simply and reliably without straining subjected to additional processing such as a screw hole bored, which Nukitoreru rotor easily and quickly from the crankshaft is obtained by extraction tool effects of There is.
[0045]
According to the second aspect of the present invention, the plate disposed opposite to the rotor of the magnet generator in which the shaft hole is fitted in the crankshaft of the engine is screwed so as to pass through the central portion of the plate. a screw member tip is brought into contact with the crank shaft end, the sandwiched position facing the screw member of said plate, and a plurality of pull-out member attached to the rear end is retained, the withdrawal formed at the end portion of the member, before Symbol inserted into a plurality of extraction through-hole provided to sandwich the shaft hole of the rotor, and forming an engaging member engaged in the through-hole peripheral portion for the withdrawal Since the leading end of the extraction member is inserted into the extraction through-hole of the rotor and is slid and rotated, the engagement member of the extraction member is pulled around the extraction through-hole. over, threaded further screw member The torque generated by the operation by applying between the rotor and the crankshaft through the engagement member, which Nukitoreru the rotor easily and reliably from the crankshaft there is an effect to be obtained.
[0046]
According to the third aspect of the present invention, since the engaging protrusion that can be engaged with the peripheral portion of the through hole for extraction of the rotor by the rotation operation is provided at the distal end portion of the extraction member, the engagement protrusion is interposed through the plate. By pulling up the pull-out member by screwing in the screw member, there is an effect that it is possible to easily realize the pull-out of the rotor from the crankshaft.
[0047]
According to the fourth and fifth aspects of the present invention, the engaging protrusion that can be engaged with the periphery of the through hole for extracting the rotor by the linear movement operation is provided at the distal end of the extracting member, or the extracting member is attached. Since the engaging protrusion that can be engaged with the periphery of the through hole for extracting the rotor by rotating the rotating plate is provided at the distal end portion of the extracting member, the extracting member is interposed via the plate in the engaged state. By pulling up the screw member by screwing in the screw member, there is an effect that a rotor that can be easily pulled out from the crankshaft can be obtained.
[Brief description of the drawings]
FIG. 1 is a front view showing a rotor of a magnet generator according to an embodiment of the present invention.
FIG. 2 is a partially cutaway cross-sectional view showing a rotor extraction tool of a magnet generator according to an embodiment of the present invention.
FIG. 3 is a perspective view of a main part showing the relationship between the extraction through hole and the extraction member in FIG. 2;
FIG. 4 is a front view showing a rotor of a magnet generator according to another embodiment of the present invention.
5 is a perspective view of a main part showing the relationship between the extraction through hole and the extraction member in FIG. 4; FIG.
6 is a cross-sectional view of the main part showing an engagement state of the extraction member with respect to the extraction through-hole in FIG. 5;
FIG. 7 is a front view showing a rotor of a magnet generator according to another embodiment of the present invention.
8 is a perspective view of a main part showing the relationship between the extraction through hole and the extraction member in FIG. 7; FIG.
9 is a cross-sectional view of the main part showing an engagement state of the drawing member with respect to the through hole for extraction in FIG. 8. FIG.
FIG. 10 is a side view showing a conventional pulley removal tool.
FIG. 11 is a side view showing a conventional rotor extraction tool.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Rotor 2 Shaft hole 3,15,18 Through hole 5 for extraction 5 Crankshaft 7 Plate 8 Bolt (screw member)
10, 16, 19 Pull-out member 12 Engagement pin (engagement member)
17, 20 Hook (engagement member)
H Extraction tool

Claims (5)

Magnets, poles and has a balance weight, a rotating body which is formed in a substantially disk shape in a non-magnetic material, magnet generator having a shaft hole provided in the rotating body is fitted to the crankshaft of the engine a rotor of the machine, the opposing positions sandwiching the shaft hole of the rotor, is inserted removal member for extraction tool for extracting the rotational element from the crankshaft, and a peripheral portion in the withdrawal member is engaged A rotor for a magnet generator, wherein a plurality of through holes for extraction are provided. A plate that is opposed to the rotor of the magnet generator having a shaft hole inserted into the crankshaft of the engine, and is screwed so as to pass through the central portion of the plate, and the tip is in contact with the end of the crankshaft and ball screw member, the sandwiched position facing the screw member of said plate, and a plurality of pull-out member attached to the rear end portion is retained, it is formed on the tip of the removal member, before Symbol A rotor extraction tool for a magnet generator, comprising: an engaging member which is inserted into a plurality of extraction through holes provided across a shaft hole of the rotor and engaged with a peripheral portion of the extraction through hole. The withdrawal member, the rotor extraction tool of the magneto generator according to claim 2, characterized by having a tip engageable with the engaging protrusions in the extraction through holes periphery by rotating operation. The withdrawal member, the rotor extraction tool of the magneto generator according to claim 2, characterized by having a tip engageable with the engaging projections into the through-hole peripheral for the extraction by a straight line moving operation. The withdrawal member, instrumentation wear and by it that the rotation operation of the plate according to claim 2, wherein the magneto generator and having a distal end engageable with the engaging protrusions in the extraction through hole periphery Rotor extraction tool.

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