JP3504712B2 - Taper key extraction device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention relates to various rotary shafts, for example,
The present invention relates to a taper key extracting device that can reliably and easily extract a taper key used for fixing a pulley or the like to an output shaft of a motor.

[0002]

2. Description of the Related Art Conventionally, as one of the methods for fixing a pulley or the like to an output shaft of a motor, a taper key is driven into the key groove provided on the outer peripheral surface of the output shaft from the end face side of the output shaft to loosen the pulley or the like. A method of fixing without causing it is known.

However, since the taper key is strongly driven into the key groove by using a hammer or the like, the work of extracting the taper key is performed by using a strong bearing extracting device having the following structure.

That is, in the bearing extracting device, substrates having a certain length are arranged in a substantially parallel state at positions separated from the end surface of the shaft supported by the bearing, and bearing engaging arms are provided on both sides of the substrate. The base end is pivotally connected, an engaging hook that can engage with the bearing is provided at the tip of the bearing engaging arm, and further, the base end of the screw rod is screwed to the center of the board, and the base end of the screw rod is attached. It is in contact with the end face of the shaft.

As the original usage of the bearing extracting device, the engaging hook is engaged with the outer peripheral edge of the bearing,
After that, the bearing is pulled out by utilizing the reaction force by advancing the screw rod.

[0006]

However, if the above-mentioned conventional bearing extracting device is directly applied to the taper key,
Since the taper key is driven into only one side of the output shaft, only the engaging hook provided at the tip of one of the two bearing engaging arms can engage with the taper key. Therefore, when the screw rod is advanced in this state, the base end of the bearing engaging arm is pivotally supported on one end of the board, so that the entire device deforms in the direction toward the one end side, and the bearing extracting device is sufficiently removed. It cannot exert its force, and when the taper key is pulled out, the taper key deforms,
It may not be possible to use it again. But,
Since many taper keys are special ones, it is necessary to remanufacture them, and it is necessary to prepare a replacement key separately, which makes the work of extracting the taper keys complicated.

An object of the present invention is to provide a taper key extracting device which can solve the above problems.

[0008]

According to the present invention as set forth in claim 1, there is provided a device for removing a taper key driven in for fixedly connecting an object to be attached to an end portion of a shaft, the device being capable of advancing and retracting forward and backward in a device body. The key removal means is provided with a key engagement part that can be engaged with the head of the taper key at the tip, and the device main body is provided with a space parallel to the key removal means so as to be able to advance and retreat in the front-rear direction. A first reaction force receiving means having a shaft end surface abutting portion capable of abutting the end surface, and a second reaction force receiving means provided in the apparatus main body in parallel with the key extracting means and having an attachment object abutting portion at its tip. And a means for removing the key,
The apparatus is adapted to be fitted into the irregular openings provided on the front and rear end walls connected to the front and rear ends of the apparatus body.

Further, in the present invention according to claim 2, there is provided a device for extracting a taper key driven to fixedly connect an object to be attached to an end portion of a shaft, wherein the front and rear end walls connected to the front and rear end portions of the device body are provided. A key engaging piece that can be moved forward and backward but not rotatable by being fitted in the respective shaped openings provided in the penetrating state, and a key engaging piece that can engage with the head of the taper key at the tip of the threaded rod. Is attached removably, and at the bottom of the main body of the device, a reaction force receiving screw rod that can move back and forth in the longitudinal direction is provided in a space parallel to the key removing screw rod, and the tip of the screw rod contacts the end face of the shaft. A possible shaft end face contact portion is provided, and a reaction force receiving plate that is parallel to the key extraction screw rod is provided on the entire upper surface of the device body, and an attachment object contact portion is provided at the tip of the reaction force receiving plate. In addition, the device body of the key extraction screw rod A nut is screwed onto the rearward part, and the rotation control lever is detachably fitted to the nut.

In the present invention according to claim 3, in the above-mentioned claim 2, instead of the above-mentioned key extraction screw rod, a key extraction rod is attached to the central part of the apparatus main body so as to be able to move back and forth.
The rear end of the key extracting rod is connected and communicated with the cylinder driving device.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The taper key extracting device according to the present invention will be described in detail below with reference to the embodiments shown in the accompanying drawings.

(Embodiment 1) In the embodiment shown in FIG. 1 to FIG. 9, a taper key extracting device A according to the present invention extracts a taper key T used for fixing a pulley P to an output shaft S of a motor M. It is shown as the device used.

First, the overall construction of the taper key extracting device A will be described with reference to FIGS.

As shown in FIG. 1, a taper key extracting device A
Is disposed on the tip side of the output shaft S of the motor M and has the following configuration.

In FIG. 1, 10 is a taper key extracting device A.
In the main body of the apparatus, a key extraction screw rod 20 that can move forward and backward but cannot rotate is provided in the central portion of the device main body 10 in a penetrating state, and the tip of the screw rod 20 engages with the head t of the taper key T. A compatible key engagement piece 30 is detachably attached.

In addition, a reaction force receiving screw rod 40 is provided in the lower portion of the device body 10 in a penetrating state so as to be capable of advancing and retreating in the front-rear direction with a gap in parallel with the key extracting screw rod 20. A shaft end surface contact portion 50 that can contact the end surface of the shaft S is provided.

Further, a reaction force receiving plate 60 which is substantially parallel to the key removing screw rod 20 is provided on the upper front surface of the apparatus main body 10, and
An attached object contact portion 70 that contacts one side surface of the pulley P is provided at the tip of the reaction force receiving plate 60.

Further, a nut 80 is screwed on a portion of the key removing screw rod 20 which is behind the main body 10 of the device.
A rotation control lever 90 is detachably fitted to 80.

A taper key extracting device A having such a structure
The taper key extraction work by the method will be described below.

First, with one side surface of the pulley P in contact with the attached object contact portion 70 provided at the tip of the reaction force receiving plate 60, and with the rotary operation lever 90 removed, the key extraction screw rod 20 is attached. By moving forward, the key engaging piece 30 is engaged with the head t of the taper key T, and further, the reaction force receiving screw rod 40 is rotated,
The attached object contacting portion 70 provided at the tip thereof is brought into contact with the substantially central portion of the end surface of the output shaft S.

After that, the rotation operating lever 90 is fitted to the nut 80 attached to the rear end of the key extracting screw rod 10, and when the rotation operating lever 90 is rotated, the key extracting screw rod is rotated by the same rotation.
A great tensile force is generated in 20, and the taper key T can be easily and quickly pulled out by utilizing this tensile force.

As described above, according to the present invention, the apparatus main body 10
, Key extraction screw rod 20, reaction force receiving screw rod 40, reaction force receiving plate
By using the taper key extracting device A having a simple structure composed of 60, even one person can easily, quickly and surely extract the taper key T.

Further, since the reaction force generated when the taper key T is pulled out is received by the reaction force receiving screw rod 40 and the reaction force receiving plate 60 at two places, stable extraction work can be performed.
Therefore, the extraction work can be performed safely, and since unnecessary force is not applied to the taper key T, the taper key T can be prevented from being deformed and can be reused, and a spare taper key T is separately prepared. There is no need.

Next, each component or constituent element of the taper key extracting device A in the illustrated embodiment will be specifically described.

(Device Main Body 10) The device main body 10 has a rectangular box shape made of a thick plate, and its front and rear end walls 12, 13 are formed.
A reinforcing sleeve 10a is sandwiched therebetween, and a through hole 11 having a circular cross section extending in the front-rear direction over the entire length is formed in the reinforcing sleeve 10a. Then, a key extraction screw rod 20 described later is inserted into the through hole 11 in a state in which it can be advanced and retracted but cannot be rotated.

That is, the apparatus main body 10 has front and rear end walls 12 and 13 connected to the front and rear ends thereof, and is provided with modified openings 14 and 15, respectively, and the modified openings 14 and 15 are used for a key extraction screw rod to be described later. It has a rectangular cross-section that bulges out on both sides, similar to 20.

Therefore, the key removal screw rod 20 is the device body 10
It can move forwards and backwards inside, but cannot rotate relative to it.

Further, the apparatus body 10 has a front and rear end walls 12 and 13 at a lower portion thereof with a space parallel to the reinforcing sleeve 10a.
The reinforcing sleeve 10b is interposed between them.

A through hole 16 extending over the entire length is provided in the reinforcing sleeve 10b. Further, the through-hole 16 is provided with an enlarged diameter opening 17 on the tip side thereof,
A threaded cylinder with a female threaded surface formed on the inner surface within the expanded diameter opening 17.
18 is fitted, and the screw cylinder 18 is tightened by a fixing bolt 18a.

Then, in the screw cylinder 18, as described above, and
The reaction force receiving screw rod 40, which will be described in detail later, is screwed.

Further, in this embodiment, the apparatus body 10 has a handle 19 integrally attached to its upper surface.
By grasping 19 with one hand, the taper key extracting device A can be easily faced to the output shaft S.

Further, in this embodiment, the taper key extracting device A is constructed by making the thick plate constituting the device main body 10 a material such as super super duralumin which is lightweight but has high strength.
It is possible to significantly reduce the weight, and it is possible to ensure the handleability and the safety of the user in the event of a drop.

(Key removal screw 20) The key removal screw 20 is
As shown in FIG. 1, both ends thereof are fitted into the through hole 11 in a state of protruding from the front and rear ends of the apparatus body 10.

Further, as shown in FIGS. 4 and 5, the key extracting screw rod 20 has a male screw surface 21 formed on the outer peripheral surface thereof, and a chamfered top and bottom to form a flat surface 22. Specifically, it has a rectangular cross-sectional shape in which both sides are swollen.

The key-removing screw rod 20 is fitted in a non-rotatable state, although it can move back and forth, through the modified openings 14 and 15 provided in the front and rear end walls 12 and 13 connected to the front and rear ends of the apparatus body 10. Will be.

Further, the key removing screw rod 20 has
The key mounting part 23 is integrally formed, and the key mounting part 23
Is composed of a rectangular plate-shaped mounting portion main body 23a, and a claw portion 23b continuously provided in a bent state downward at the tip of the mounting portion main body 23a.

Further, detachable connecting balls 23c are embedded on both side surfaces of the key attaching portion 23.

(Key Engagement Piece 30) As shown in FIGS. 4 to 7, the key engagement piece 30 has a screw rod connecting portion 31 having a concave cross section open upward and a hook-shaped vertical section. It is formed of a key engaging portion 32 that can be engaged with the head t of the taper key T.

A screw rod tip fitting groove 31a is formed in the screw rod connecting portion 31. Further, the screw rod connecting portion 31 is provided with a claw portion fitting opening 31c opening downward at the front portion of its bottom wall 31b, and the claw portion fitting opening 31c communicates with the above-mentioned screw rod tip fitting groove 31a. There is.

The screw rod tip fitting groove 31a has the same shape as the mounting portion main body 23a of the key mounting portion 23 provided at the tip of the key extracting screw rod 20 described above.
The claw part insertion opening 31c is formed in the claw part 23b of the key attachment part 23 described above.
It has the same shape as.

Further, the threaded rod connecting portion 31 has side walls 31 on both sides thereof.
Ball fitting grooves 31e and 31e are provided in d and 31d, respectively.

Therefore, the screw rod tip fitting groove 31 of the screw rod connecting portion 31 is formed.
a and the claw part insertion opening 31c, respectively.
Mounting part body 23a and key part of key mounting part 23 provided at the tip of 20
By simply fitting it into 23b, the connecting / disconnecting ball 23c will be elastically fitted into the ball fitting grooves 21e, 21e, so that the key engaging piece 30 can be connected to the key extracting screw rod 20 easily and securely. it can.

Further, as shown in FIGS. 4 to 7, the hook-shaped key engaging portion 32 has the hook portion 32a at the tip thereof arranged in the diameter reducing direction as a whole.

As shown in FIG. 1, even with the taper key T mounted on the output shaft S having a relatively small diameter, the key engaging portion
By securely engaging the tip hook portion 32a of 32 with the head t of the taper key T, the taper key T can be pulled out.

(Reaction force receiving screw rod 40) The reaction force receiving screw rod 40, which is the first reaction force receiving means, also has a key removing screw rod 20 as shown in FIG.
Similarly, has a length that can penetrate the device body 10,
A screw cylinder 18 that extends inside the through hole 16 provided in the lower portion of the device body 10 and has a part thereof fixed to the front end of the device body 10
It is screwed inside. Further, the reaction force receiving screw rod 40 is integrally provided at its tip with a shaft end surface contact portion 50 capable of contacting the end surface of the output shaft S.

Therefore, the taper key T has a screw rod 20 for removing the key.
After the key engagement portion 32 provided at the tip of the shaft is engaged, the reaction force receiving screw rod 40 is rotated, so that the shaft end contact portion 50 can be brought into contact with the end surface of the output shaft S. The output shaft S can effectively receive a part of the reaction force generated in the extraction work.

In this embodiment, the reaction force receiving screw rod 40 is
A clamping nut 41 is attached to a front part of the device body 10. After the shaft end surface abutting portion 50 is brought into contact with the end surface of the output shaft S, the clamping nut 41 is rotated to generate a reaction force. The receiving screw rod 40 is strongly clamped to the apparatus main body 10 to securely prevent the reaction force receiving screw rod 40 from loosening during the work of extracting the taper key T, resulting in an accident.

(Reaction Force Receiving Plate 60) The reaction force receiving plate 60, which is the second reaction force receiving means, is arranged on the front surface of the upper portion of the apparatus main body 10 in a state substantially parallel to the key extracting screw rod 20. .

As shown in FIG. 1, the reaction force receiving plate 60 has its base end fixed to the base end of the apparatus main body 10 by welding or the like, and has its tip end covered with one side surface of the pulley P. The attachment contact portion 70 is formed.

Therefore, the taper key T has a screw rod 20 for removing the key.
After engaging the key engaging portion 32 provided at the tip of the key, by rotating the key extracting screw rod 20, a part of the reaction force generated when the taper key T is extracted is attached to the reaction force receiving plate 60. It can be effectively received by the one side surface of the pulley P via the object contact portion 70.

Further, in this embodiment, the reaction force receiving plate 60 is shown in FIG.
As shown in FIG. 3, the horizontal flat plate portion 61 and the bent portions 62 formed by bending both sides of the horizontal flat plate portion downward are provided, and the overall rigidity can be increased. Can be achieved.

(Nut 80) As shown in FIG. 1, the nut 80 is screwed on the key extraction screw rod 20 at a portion projecting from the rear portion of the main body 10 of the apparatus through a spacer ring 81. In this embodiment, it is shown as a hexagonal nut as shown in FIG.

Then, the taper key T can be easily pulled out from the output shaft S by rotating the nut 80, including a later-described rotation operation lever 90, by a desired driving means.

(Rotating operation lever 90) The rotating operation lever 90 is
As shown in FIGS. 8 and 9, the lever main body 91 is made of a long flat plate, and the nut engaging portion 92 provided at the center of the lever main body 91.

The nut engaging portion 92 is, as shown in the figure, a tubular nut 94 fitted into an opening 93 provided in the central portion of the lever body 91, and a diameter-expanding flange 95 integral with the tubular nut 94. Consists of. Then, by connecting the expanded flange 95 to the lever body 91 with the bolt 96, the nut engaging portion 92
It can be integrated with the lever body 91.

Further, since the cylindrical nut 94 has the same inner peripheral surface shape as the hexagonal shape formed on the outer peripheral surface of the nut 80, it can be easily fitted into the nut 80. Become.

Further, the rotary operation lever having such a structure
At 90, since the lever body 91 has a sufficient length from the center to the end, it is possible to secure a sufficient rotational moment even if a slight force is applied to the end, and the lever withdrawing rod 20 is strong. A pulling force can be applied, and the taper key T can be reliably pulled out with a slight force.

Further, in this embodiment, the rotary operation lever 90
By using a material that has a high strength but is lightweight, such as ultra-super duralumin, a significant reduction in weight can be achieved.
It is possible to secure the handleability and safety of the user in the event of a drop.

(Embodiment 2) In this embodiment, in the taper key extracting device A having the above-mentioned structure, the output shaft S having a small diameter is used.
In place of the key engagement piece 30 suitable for removing the taper key T attached to the above, a key engagement piece 35 suitable for removing the taper key T attached to the large-diameter output shaft S is used. .

That is, as shown in FIGS. 11 to 14, the key engaging piece 35, as shown in FIGS. 4 to 7, has a threaded rod connecting portion 36 having a concave cross section open downward and a hook-shaped longitudinal section. Has a face,
It is formed of a key engaging portion 37 that can be engaged with the head t of the taper key T.

A screw rod tip fitting groove 36a is formed in the screw rod connecting portion 36. Further, the screw rod connecting portion 36 is provided with a claw portion fitting opening 36c opening upward at the front portion of the upper wall 36b thereof, and the claw portion fitting opening 36c communicates with the above-mentioned screw rod tip fitting groove 36a. There is.

The screw rod tip fitting groove 36a has the same shape as the mounting portion main body 23a of the key mounting portion 23 provided at the tip of the key extracting screw rod 20 described above.
The claw part insertion opening 36c is formed in the claw part 23b of the key attachment part 23 described above.
It has the same shape as.

Further, the threaded rod connecting portion 36 has side walls 36 on both sides thereof.
Ball fitting grooves 36e and 36e are provided in d and 36d, respectively.

Therefore, as shown in FIG. 11, when the key-extracting screw rod 20 is inverted by 180 °, the screw rod tip fitting groove 36a and the claw portion fitting opening 36c of the screw rod connecting portion 36 are respectively
By simply fitting the attachment / detachment main body 23a and the claw portion 23b of the key attachment portion 23 provided at the tip of the key extraction screw rod 20, the attachment / detachment connection ball 23c can be elastically inserted into the ball insertion grooves 21e, 21e. Therefore, the key engagement piece 35 can be easily and surely connected to the key extraction screw rod 20.

Further, in this embodiment, as shown in FIGS. 11 to 14, the hook-shaped key engaging portion 37 has a tip hook portion 37.
The a is arranged as a whole in the radial direction.

Therefore, as shown in FIG. 10, even in the case of the taper key T mounted on the output shaft S having a relatively large diameter, the tip hook portion 37a of the key engaging portion 37 is surely attached to the head t of the taper key T. By engaging, the taper key T can be pulled out.

As described above, in the present invention, the key engaging piece is simply
Only by replacing 30,35, it is possible to correspond to the output shaft S having a different diameter.

Not only can the two different diameters described above be accommodated, but the reaction force receiving screw rod 40 can be eccentrically decentered from the center of the output shaft S by an eccentric amount so that the taper key on the output shaft S having another different diameter can be obtained. It can also be suitably used for T extraction work.

[0069]

According to the present invention, a taper key extracting device is attached to a central portion of a main body of the device so as to be able to move forward and backward, and has a key engaging means provided at a tip end thereof with a key engaging portion engageable with a head of the taper key. A first reaction force receiving means provided at a lower portion of the main body of the apparatus so as to be able to advance and retreat in the front-rear direction with a space provided in parallel with the key removing means, and having a shaft end surface abutting portion capable of abutting with an end surface of the shaft at a tip end thereof; A second reaction force receiving means is provided on the upper part of the main body of the apparatus, substantially parallel to the key extracting means, and has a tip end thereof with an attached object contact portion.

As described above, by using the taper key extracting device having a simple structure consisting of the device main body, the key extracting means, and the two reaction force receiving means, even one person can easily, quickly and surely extract the taper key. You can do the work.

Further, since the reaction force generated when the taper key is pulled out is received by the two reaction force receiving means at two places, stable extraction work can be performed. Therefore, the extraction work can be performed safely, and since unnecessary force is not applied to the taper key, the taper key can be prevented from being deformed and can be reused, and it is not necessary to prepare a separate taper key separately. .

The key extracting means is provided with a key extracting screw rod that can move forward and backward but cannot rotate but is in a rotatable state, and a key engaging piece that can be engaged with the head of the taper key can be detachably attached to the tip of the key rod. In the case of being attached, a single taper key extracting device can be used for a large number of shafts having different shaft diameters by using key engaging pieces having different hook shapes.

[Brief description of drawings]

FIG. 1 is an explanatory diagram of the overall configuration of a taper key extracting device according to a first embodiment of the present invention.

FIG. 2 is a view taken along line I-I of FIG.

FIG. 3 is a view taken along line II-II of FIG.

FIG. 4 is an exploded perspective view showing a state before the key engagement piece is attached to the engagement piece attachment shaft.

FIG. 5 is an exploded perspective view showing a state after the key engagement piece is attached to the engagement piece attachment shaft.

FIG. 6 is a plan view of a key engagement piece.

FIG. 7 is a side view of the key engagement piece taken along line III-III in FIG.

FIG. 8 is a plan view of a rotation assisting tool.

FIG. 9 is a partially cutaway side view of the rotation assisting tool.

FIG. 10 is an explanatory diagram of the overall configuration when a key engagement piece of another form of the taper key extracting device according to the present invention is attached.

FIG. 11 is an exploded perspective view showing a state before the key engagement piece is attached to the engagement piece attachment shaft.

FIG. 12 is an exploded perspective view showing a state after the key engagement piece is attached to the engagement piece attachment shaft.

FIG. 13 is a plan view of a key engagement piece.

14 is a cross-sectional side view of the key engagement piece taken along line IV-IV in FIG.

[Explanation of symbols] A taper key extraction device T taper key 10 Device body 20 key removal screw rod 30 key engagement piece 40 Reaction force receiving rod 50 Shaft end face contact part 60 Reaction force receiving plate 70 Attached part contact part 80 nuts 90 Rotation control lever

Claims (3)

(57) [Claims] 1. A device for extracting a taper key (T) driven to fixedly connect an object to be attached to an end of a shaft, which is attached to a device body (10) so as to be able to move forward and backward, and has a taper key (T) at its tip. ) A key removing means having a key engaging portion that can be engaged with the head, and a device main body (10) provided with a space in parallel with the key removing means so as to be able to move forward and backward, and an end face of the shaft at the tip. A first reaction force receiving means having a shaft end surface abutting portion (50) capable of abutting with the key body, and a device body (10) provided in parallel with the key extracting means, and a tip end of the abutting object abutting portion (70). And a second reaction force receiving means , wherein the key extracting means is connected to the front and rear ends of the device body ( 10 ).
Shaped openings ( 14, 13 ) on the front and rear end walls ( 12, 13 )
15 ) Taper key removal device characterized by being fitted to . 2. A device for extracting a taper key (T) driven to fixedly connect an object to be attached to an end of a shaft, wherein front and rear end walls ( 12,1 ) connected to front and rear ends of a device body (10).
3 ) Fit into the special shaped openings ( 14,15 )
The key extraction screw rod (20) that can move back and forth in the front-rear direction but cannot rotate is provided in the penetrating state, and the screw rod (2)
0) A key engaging piece (30) that can be engaged with the head of the taper key (T) is detachably attached to the tip of the (0), and a space parallel to the key extracting screw rod (20) is attached to the lower part of the device body (10). Reel for receiving reaction force that can be opened and moved back and forth (40)
Is provided in a penetrating state, and a shaft end face abutting part (50) capable of abutting the end face of the shaft is provided at the tip of the screw rod (40), and the key removing screw rod (20) is provided on the entire upper surface of the device body (10). ) Parallel to the reaction force receiving plate (60), the reaction force receiving plate (60) is provided with an attachment object contact portion (70) at the tip, and a device for the key extraction screw rod (20). The nut (80) is screwed onto the rear part of the body (10), and the nut (80)
A taper key extraction device characterized in that a rotary operation lever (90) is detachably fitted to the. 3. A key driving rod is attached to the center of the device body (10) in place of the above-mentioned key extracting screw rod (20) so as to be movable back and forth, and the rear end of the key extracting rod is attached to a cylinder drive device. The taper key extracting device according to claim 2, wherein the taper key extracting device is connected to and communicated with.