JP4072657B2 - Dental laboratory raise - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dental technological laser that allows easy attachment of an attachment for attaching a polishing tool and the like, and does not cause the polishing tool to fall off during use.
[0002]
[Prior art]
Conventionally, a motor shaft and an attachment for mounting a polishing tool on a dental technician's raisé have simply attached the attachment for mounting an abrasive tool on the motor shaft by taper to taper.
[0003]
[Problems to be solved by the invention]
However, with only the fastening with the taper, the attachment may be displaced due to a taper deviation or a thrust or radial load.
[0004]
[Means for Solving the Problems]
In view of the above, the inventors have solved this problem by the following means as a result of research experiments.
(1) In a dental technological laser comprising a motor, a shaft of the motor, and a tool mounting attachment fastened to the front portion of the shaft, the front portion of the shaft of the motor is tapered at its tip. And a male screw part on the outer periphery of the rear thereof, the attachment is a cylindrical body, a female screw part is fastened to the inner wall of the rear circular hole part, and the attachment is fastened to the shaft in front of the female screw part. In this case, the dental technological laser according to claim 1, further comprising: a circular hole portion having a diameter reduced in a taper shape that comes into contact with the taper portion at the tip of the shaft, and wherein the thread of the male screw portion is slightly dropped.
(2) In a dental technological laser comprising a motor, a shaft of the motor, and a tool mounting attachment fastened to the front part of the shaft, the front part of the shaft of the motor is tapered at its tip. And a male screw part on the outer periphery of the rear thereof, and the attachment is a cylindrical body. When the attachment is fastened to the shaft in front of the female screw part on the inner wall of the rear circular hole part, The shaft and a circular hole portion that is reduced in diameter so as to contact the tapered portion at the tip, and the thread of the male screw portion is slightly dropped, and the tapered portion at the tip of the shaft and the A dental technological raise characterized in that the taper angle in front of the circular hole of the attachment is different.
(3) The dental craft raise according to item (1) or (2), wherein the attachment is provided with a tapered threaded portion on the outer periphery in front of the attachment.
(4) The dental technician raise according to (1) or (2), wherein the attachment is provided with a fixing tool for attaching a disk-shaped tool in front of the attachment.
(5) Items (1) to (4), characterized in that the motor shaft front portion of the dental technological raise and the tool mounting attachments fastened to the shaft front portion are provided at both left and right end portions of the motor. The dental craft raise according to any one of items 1).
[0005]
DETAILED DESCRIPTION OF THE INVENTION
In the embodiment of the present invention, in addition to the conventional fastening of the motor shaft and the attachment for attaching the polishing tool only by the taper, a male screw having a part of the screw thread dropped on a part of the surface of the motor shaft is provided. An internal thread to be screwed to the male screw is provided on the inner wall of the opening circular hole portion of the attachment for attaching the polishing tool, facilitating attachment at the time of the screwing, preventing shaft runout at the time of fastening the attachment, and The direction of the screw for tightening is tightened with respect to the rotational direction, so that deviation due to misalignment due to taper alone or deviation due to applied force in the thrust or radial direction will occur in advance. Prevents attachments from falling off.
[0006]
【Example】
Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 is an external view of the mounting when an attachment is fastened to the motor shaft of the dental technician's laser according to the present invention and a polishing tool is attached to the tip.
In the figure, 1 is an electrical raise for dental technicians, 2 is a motor, 3 is a motor shaft cover, 4 is a cut shaft, 5 is a notch for holding a shaft, and 6 is a taper for buffing and brushing for attaching a polishing tool (takenoko) (Attachment 6), 7 is a grindstone attachment (attachment 7) for attaching a polishing tool, 8 is an attachment removal hole, 9, 10 is the rotation direction of the shaft, 11 is a buff, 12 is a grindstone (disk) 13 is a flat washer , 14 is a thick washer, 15 is a pan head screw, 17 is a right thread on a tapered surface, and 44 is a motor shaft.
As shown in FIG. 1, an attachment (bamboo shoot) 6 and a whetstone attachment 7 with a buff brush taper are fastened to the right and left ends of the shaft 44 of the electric lace 1 for dental technicians. A buff 11 and a disk 12 are respectively mounted. Since the above is fastened and mounted with a reverse screw against the rotation of the shaft 44, it does not fall off during operation.
[0007]
Next, the details of the structure for fastening the attachment to the motor shaft according to the present invention will be described.
FIG. 2 is a cross-sectional view taken in the direction of arrows XX excluding the polishing tool of FIG. 1 when a buffing brush attachment (bamboo shoot) is fastened to the motor shaft.
In the figure, the left side shows details of the shaft 44 of the motor,
Reference numeral 24 denotes a taper portion at the tip of the motor shaft, 25 denotes a pure cylindrical portion, 26 denotes a male screw portion, 27 denotes a fastening direction of the attachment, L ₁ denotes a length of the taper portion, L ₂ denotes a cylinder length, and L ₃ denotes a male screw , L ₄ indicates the length of the base cylinder, and L ₅ indicates the length of the shaft notch.
The right side of the figure shows the details of the attachment (bamboo shoot) 6, 16 is the tip of the attachment, 18 is the tip perforated part, 19 is the tapered part of the inner hole attachment, 20 is the base cylindrical part, and 21 is the female thread part. , 22 is a connecting recess between the cylindrical portion and the tip portion, 23 is a cylindrical portion of the attachment, L ₆ is the length of the base cylindrical portion, L ₇ is the length of the female screw, L ₈ is the length of the cylindrical portion, and L ₉ is the length of the tapered portion of the attachment, L ₁₀ represents a length of the distal piercing portion.
[0008]
As shown in FIG. 2, the arrangement on the right side of the motor 2 of the dental craft raiser 1 to which the polishing tool is mounted is based on the shaft 44 and the polishing tool mounting attachment (attachment 6) for fastening to the shaft. It is configured.
The basic shape of the motor shaft 44 is a cylindrical body, and a tapered portion (length L ₁ ) 24 is provided at the tip thereof.
And from the beginning of the tapered portion 24, towards the base of the shaft 44 has a pure cylindrical shape portion 25 of length L _2, further to start from the base direction of the net cylindrical shape portion 25, the internal thread portion of the attachment ( 21) A male thread portion 26 for screwing (described later) is screwed with a length L ₃ .
In addition, the male threaded portion 26 has a small threaded part (1/2 to 1/3 height),
Further, a pure cylindrical portion 25 having a length L ₄ is formed from the end of the male screw portion 26 toward the base, and from the end, a shaft notch 4 for holding the shaft 44 with an instrument and fixing it at the time of attachment / detachment is long. It is now equipped with L _5,
The shaft after the end is disposed inside the motor as a cylindrical shaft (44).
[0009]
Next, the shape of the attachment 6 is
The outer shape is a cylindrical shape whose base portion has a required length in the axial direction, and the distal end portion 16 of the attachment formed integrally with the cylindrical shape is a taper whose surface is engraved with a right-handed or left-handed helical screw. A conical shape having a right-hand surface screw 17 is provided, and a small hole 8 for removing the attachment is penetrated at a connection portion between the cylindrical portion 23 of the attachment and the connection concave portion 22 between the distal end portion 16 of the attachment.
And the internal shape of the attachment is
The base cylindrical portion 20 having an inner diameter fitted to the pure cylindrical portion 25 of the shaft is provided, and the base cylindrical portion (length L ₆ ) 20 is provided. A right-handed or left-handed female screw part 21 that is screwed onto the male screw part 26 of the motor shaft 44 is screwed to a length L ₇ .
Further, the same cylindrical portion as the base portion of the length L ₈ continues from the terminal end of the female screw portion 21 to the tip, and further, the tip of the taper portion of the tip of the motor shaft 44 (the taper portion of the motor shaft). ) for being fitted to 24, the tapered portion of the tapered portion (the inner hole of the tapered, provided the length L ₉₎ 19, further from its end, the tip of the same diameter of the tapered portion 19 of the bore tip A perforated part (length L ₁₀ ) 18 is provided.
[0010]
In the above configuration, when the attachment 6 is moved in the attachment fastening direction 27 and fastened to the shaft 44,
First, the base portion of the attachment 6 is fitted into the tip portion of the shaft 44. At this time, a portion near the base portion of the female screw portion 21 of the attachment 6 contacts a portion near the tip portion of the male screw portion 26 of the shaft 44. Therefore, after that, the attachment 6 is rotated clockwise and screwed. In this case, as described above, a part of the thread of the male screw is dropped, so that the screwing can be easily performed.
When in the above state, the taper portion 19 of the inner hole of the attachment 6 and the taper angle of the taper portion 24 of the shaft 44 are slightly different,
For example, since the angle of the taper portion 24 of the shaft 44 is 35 ° and the angle of the taper portion 19 of the inner hole of the attachment 6 is 45 °, the intermediate portion of the taper portion 24 and the taper portion 19 of the inner hole are fastened at the time of fastening. The tip of the ring is in a line contact state,
The axis of the attachment 6 is aligned with the axis of the shaft 44.
As described above, since the annular line contact is made between the tapered portion 24 of the shaft 44 and the tapered portion 19 of the inner hole of the attachment 6, the shaft 44 and the attachment 6 can be easily aligned with each other and no shaft shake occurs.
Further, since the whole is fastened by screwing the male screw part 26 with the screw thread slightly dropped and the female screw part 21, for example, a buff 11 or the like is fixed to the tip of the attachment 6 to polish the material. In this case, it is possible to prevent the occurrence of displacement due to the load applied in the radial direction or the thrust direction, and the attachment 6 does not fall off.
In addition, since the above is screwed in with the reverse screw with respect to rotation of the shaft 44, it is the direction tightened at the time of work.
[0011]
When the attachment 6 is to be removed after the work such as polishing is completed, the portion of the cut shaft 4 is held and fixed by an instrument, and then a rod-like rotating instrument is inserted into the attachment removal hole 8 of the attachment 6 Then, the attachment 6 can be easily removed by rotating it reversely with respect to the rotation direction of the shaft 44.
Moreover, when removing polishing tools, such as the buff 11, from the attachment 6, the attachment 6 is fixed and a tool can be reversely rotated similarly and can be removed easily.
[0012]
FIG. 3 is a cross-sectional view in the YY direction, excluding the polishing tool of FIG. 1, when a polishing wheel (disc) attachment is fastened to a motor shaft disposed on the left side of a dental technological raise.
In the figure, 28 is a base cylindrical body, 29 is a female thread portion, 30 is a cylindrical portion, 31 is an inside of the cylindrical portion, 32 is a tapered portion of an inner hole, 33 is a perforated portion of a tapered tip portion, and 34 is a concave portion on a cylindrical surface. , 35 is a tip cylindrical body, 36 is a female threaded portion, 37 is a cylindrical projection, 38 is a pan screw receiving port, 39 is a flat washer hole, 40 is a thick washer hole, 41 is a pan screw screw portion, and 42 is The diameter of the pan screw, 43 is the fastening direction with the attachment, L ₁₁ is the length of the base cylindrical portion, L ₁₂ is the length of the internal thread, L ₁₃ is the length of the hollow cylinder, and the length of the tapered portion of the L ₁₄ inner hole L ₁₅ represents the length of the perforated portion, and L ₁₆ represents the length of the female screw.
[0013]
As shown in FIG. 3, the left side arrangement of the motor 2 of the dental technician's razor 1 to which the polishing tool is mounted includes the right side, the target shaft 44, and a polishing tool for fastening to the shaft. It is comprised from the said grindstone (attachment 7).
Since the structure of the motor shaft 44 is the same as that described above except for the object, the description thereof is omitted.
And the shape of the said attachment 7 which fastens the grinding | polishing tool (grinding stone 12) with which the motor shaft 44 is mounted | worn is the following.
The outer shape is a base cylindrical body 28 whose base portion has a required fixed length in the axial direction, and the distal end portion formed integrally with the cylindrical body has a gentle concave portion 34 on the surface, and the distal end cylindrical body again. 35,
Furthermore, the tip has a cylindrical projection 37 having an outer diameter matching the inner hole 39 of a flat washer for mounting a polishing tool, and an attachment is provided in the recess between the base cylindrical body 28 and the tip cylindrical body 35. The removal hole 8 is penetrated.
[0014]
And the internal shape of the attachment 7 is
A cylindrical body of a base cylindrical portion 28 having an inner diameter that fits into the pure cylindrical portion 25 of the shaft 44, and is provided with the base cylindrical body (length L ₁₁ ) 28, from the terminal end toward the distal end portion. the right-handed or left-handed female screw portion 29 screwed to the external thread portion 26 of the motor shaft 44, is a length L ₁₂ screwed,
Further, a hollow cylindrical shape having the same length L ₁₃ as the base portion continues from the end of the female screw portion 29 toward the tip, and further, the tip of the motor shaft 44 is connected to the tapered portion 24 of the motor shaft. A tapered portion (length L ₁₄ ) 32 of an inner hole for fitting is provided, and a perforated portion (length) of a tapered tip portion having the same diameter as the tip of the tapered portion 32 of the inner hole is provided from the end thereof. L ₁₅ ) 33 is provided, and a female screw portion 36 for screwing a male screw for tightening the polishing tool (pan head screw 15) from the end is screwed with a length L ₁₆ .
The flat washer 13 for mounting a polishing tool (grindstone 12) from the outside, a thick washer 14 and a pan screw 15 for tightening the tool are provided.
[0015]
In the above configuration, when the attachment 7 is moved in the fastening direction 43 of the attachment and fastened to the shaft 44,
First, the base portion of the attachment 7 is fitted into the tip portion of the shaft 44. At this time, a portion near the base portion of the female screw portion 29 of the attachment 7 contacts a portion near the tip portion of the male screw portion 26 of the shaft 44. Therefore, after that, the attachment 7 is rotated clockwise and screwed. In this case, as described above, a part of the thread of the male screw is dropped, so that the screwing can be easily performed.
When in the above state, the taper portion 32 of the inner hole of the attachment 7 and the taper portion 24 of the taper portion 24 of the shaft 44 are slightly different,
For example, since the angle of the taper portion 24 of the shaft 44 is 35 ° and the angle of the taper 32 of the inner hole of the attachment 7 is 45 °, at the time of fastening, the intermediate portion of the shaft taper portion 24 and the inner hole of the attachment The tip of the taper portion 32 is in an annular line contact state, and the axis of the attachment 7 is aligned with the axis of the shaft 44.
As described above, since the taper portion 24 of the shaft 44 and the taper portion 32 of the inner hole of the attachment 7 are performed in an annular line contact, the shaft 44 and the attachment can be easily aligned and do not cause shaft shake.
Further, since the whole is fastened by screwing the male screw portion 26 from which a part of the thread is dropped and the female screw portion 29, a material such as a grindstone (disk) 12 is attached to the tip of the attachment 7. When polishing is performed, it is possible to prevent the occurrence of deviation due to the applied load in the radial direction or the thrust direction, and the attachment 7 does not fall off.
In addition, since the above is screwed in with the reverse screw with respect to rotation of the shaft 44, it is the direction tightened at the time of work.
[0016]
When the attachment 7 is to be removed after the work such as polishing is completed, the portion of the cut shaft 4 is held and fixed by an instrument, and then a rod-shaped rotating instrument is inserted into the attachment removal hole 8 of the attachment 7 Then, the attachment 7 can be easily removed by reversing the rotation direction of the shaft 44. Further, when removing a polishing tool such as a grindstone (disk) 12 from the attachment 7, the attachment 7 is fixed, the pan screw 15 is reversely rotated and removed, and the wall between the thick washer 14 and the flat washer 13 is removed. The grindstone (disk) 12 provided (FIG. 1) can be easily removed.
[0017]
4 is a right side view of the polishing tool grindstone (disk) in FIG.
5 is a left side view of the polishing tool buff and the brush. FIG. 5A is a left side view of the polishing tool buff FIG. 1, and FIG. 5B is a left side view of the polishing tool brush.
In the figure, 45 is a buff cloth, 46 is a buff seam, 47 is a buff fastening tip hole, 48 is a buff fastening hole, 49 is a brush bristle, 50 is a flocking plate, 51 is a brush fastening tip hole, and 52 is a brush fastening. Attaching hole, 53: polishing brush, 54 is a flat surface of the grindstone, and 55 is a grindstone fastening hole.
As described above, the various polishing tools shown in the above examples are applied to the attachment, and as a material to be polished, a resin or various metal prostheses in a dental technician are targeted.
[0018]
Further, a tip of the motor shaft 44 of the dental technological raise and an attachment (6, 7) for attaching a polishing tool fitted to the tip of the shaft are provided at both right and left ends of the motor. By selecting and using the polishing tool, it is possible to work efficiently.
[0019]
【The invention's effect】
According to the present invention, the following excellent effects can be exhibited.
1. According to the invention of claim 1 of the present invention,
The dental technician raise of the present invention is composed of a motor shaft and a tool mounting attachment fastened to the front portion of the shaft. The front portion of the motor shaft has a tapered tapered portion at the tip thereof and the rear thereof. The attachment has a cylindrical body, and the inner wall of the rear circular hole portion has a female screw portion, and the front end of the shaft when the attachment is fastened to the shaft. A taper-shaped circular hole portion that comes into contact with the taper portion, and the screw thread of the male screw portion is slightly dropped, facilitating installation during fastening and attachment fastening This prevents shaft run-out during misalignment, prevents misalignment due to misalignment, and misalignment due to load applied in the radial or thrust direction, and prevents attachments from falling off. There are fruit and attachment and detachment of the tool can be easily performed.
2. According to the invention of claim 2,
Since the taper portion at the tip of the shaft and the taper portion in front of the attachment circular hole portion have different taper angles, the intermediate portion of the taper portion of the shaft and the tip portion of the taper portion of the attachment are at the time of fastening. An annular line contact state is established, and the axis of the attachment is aligned with the axis of the shaft.
And since both the said taper parts are performed by a cyclic | annular line contact, a shaft and an attachment can align easily and it does not raise | generate a shaft runout.
3. According to the invention of claim 3,
The attachment is a so-called bamboo shoot having a tapered threaded portion on the front outer periphery of the cylindrical body, and various polishing brushes or buffs of the polishing tool can be attached to perform the polishing operation safely and reliably.
4. According to the invention of claim 4,
Since the attachment is provided with a fixing tool for attaching a disk-shaped tool in the front, a disk-shaped grindstone or the like can be attached to perform the polishing operation safely and reliably.
5. According to the invention of claim 5,
Various polishing tool attachments can be mounted on the left and right ends of the motor shaft on the dental engineer's razor motor shaft, so various polishing tools can be selected and mounted on the attachment for safe and reliable polishing work. And can proceed efficiently.
[Brief description of the drawings]
FIG. 1 is an external view of a mounting when an attachment is fastened to a motor shaft of a dental technician's laser according to the present invention and a polishing tool is attached to a tip portion.
2 is a cross-sectional view taken in the direction of arrows X-X excluding the polishing tool of FIG. 1 when a buffed brush tapered attachment (bamboo shoot) is fastened to a motor shaft disposed on the right side of a dental technician's raise.
3 is a cross-sectional view taken in the direction of arrows YY, excluding the polishing tool of FIG. 1, when an attachment for a polishing grindstone (disk) is fastened to a motor shaft disposed on the left side of a dental technician's laser. FIG.
FIG. 4 is a right side view of a polishing grindstone (disk) in FIG. 1;
FIG. 5 is a left side view of a polishing tool buff and a brush.
[Explanation of symbols]
1: Electric lace for dental technician 2: Motor 3: Motor shaft cover 4: Cut shaft 5: Shaft pressing notch 6: Attachment (bamboo shoot)
7: Attachment (for grindstone) 8: Attachment removal hole 9, 10: Direction of shaft rotation 11: Buff 12: Grindstone (disk) 13: Flat washer 14: Thick washer 15: Pan head screw 16: Tip of attachment 17 : Tapered surface right-hand screw 18: Tip perforated portion 19; Tapered portion of inner hole 20: Base cylindrical portion 21: Female screw portion 22: Connection concave portion between cylindrical portion and tip portion 23: Cylindrical portion of attachment 24: Tapered portion of motor shaft 25: Pure cylindrical part 26: Male thread part 27: Attachment fastening direction 28: Base cylindrical body 29: Female thread part 30: Cylindrical part 31: Inside of cylindrical part 32: Tapered part of inner hole 33: Perforated tip part of taper Portion 34: Recessed portion of cylindrical surface 35: Tip cylindrical body 36: Female thread portion 37: Cylindrical protrusion 38: Pan screw receiving port 39: Flat washer hole 40: Meat Thick washer hole 41: Pan screw thread portion 42: Pan screw diameter 43: Attachment tightening direction 44: Motor shaft 45: Buff cloth 46: Buff seam 47: Buff tightening tip hole 48: Buff tightening hole 49: Brush bristles 50: Flocking plate 51: Brush fastening tip hole 52: Brush fastening hole 53: Polishing brush 54: Flat plate surface of the grinding wheel 55: Grinding stone fastening hole L ₁ : Length of the taper portion L ₂ : Cylinder length L _3: length of the male screw L _4: base cylinder of length L _5: shaft cut length of portion L _6: base cylindrical portion of the length L _7: length of the internal thread L _8: length of the cylindrical portion L ₉ : Length of tapered portion of inner hole L ₁₀ : Length of tip perforated portion L ₁₁ : Length from cylindrical base end L ₁₂ : Length of female screw L ₁₃ : Length of hollow cylinder L ₁₄ : Length of tapered portion of inner hole L ₁₅ : Length of perforated portion L ₁₆ : Length of female screw

Claims (5)

In a dental technician's raise comprising a motor, a shaft of the motor, and a tool mounting attachment fastened to the front portion of the shaft,
The front part of the shaft of the motor has a tapered part tapered at the tip, and a male thread part on the outer periphery behind the tapered part,
In addition, the attachment is a cylindrical body, a female thread portion is formed on the inner wall of the rear circular hole portion, and a tapered shape that comes into contact with the tapered portion at the tip of the shaft when the attachment is fastened to the shaft in front of the female screw portion. And a circular hole portion with a reduced diameter,
In addition, the dental technological raise is characterized in that the screw thread of the male screw part is slightly dropped. In a dental technician's raise comprising a motor, a shaft of the motor, and a tool mounting attachment fastened to the front portion of the shaft,
The front part of the shaft of the motor has a tapered part tapered at the tip, and a male thread part on the outer periphery behind the tapered part,
Further, the attachment is a cylindrical body, and has a female thread portion on the inner wall of the rear circular hole portion, and a tapered shape that comes into contact with the tapered portion of the shaft and the tip when the attachment is fastened to the shaft in front of the attachment. And a circular hole portion with a reduced diameter,
And the thread of the male thread part has been dropped a little,
The dental technological raise, wherein the taper portion at the tip of the shaft and the taper portion in front of the circular hole of the attachment have different taper angles. The dental technological raise according to claim 1 or 2, wherein the attachment is provided with a tapered threaded portion on the outer periphery in front of the attachment. The dental technological raise according to claim 1 or 2, wherein the attachment is provided with a fixing tool for attaching a disk-shaped tool in front of the attachment. The motor shaft front part of the dental technician's raisé and the tool mounting attachments fastened to the shaft front part are provided at both left and right ends of the motor. Raise for dental technicians as described in 1.

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