JP2008154405A - Electric motor and punching machine having same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve problems of a conventional electric motor such as overheating due to continuous operation and difficult rotation due to stuck cutting chips which result from cutting chips generated when a hole is made in a work with a drill cutting edge adhere to the periphery of a rotating shaft or chuck and are left as they are without usage. <P>SOLUTION: This electric motor has a ventilation passage therein, and gas passing through the ventilation passage cools the motor to prevent overheating and blows off cutting chips. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a motor for rotating a drill blade capable of drilling holes in scallops, other shellfish, and other articles, and a drilling machine equipped with the motor.

  A motor M (FIG. 10) that rotates a drill blade is used in a drilling machine that drills a hole B (FIG. 11 (b)) for inserting an aquaculture shell locking tool into the scallop A (FIG. 11 (a)). ing. As an example of a drilling machine, many set tools that can be held vertically with scallop ears facing down are attached to an endless chain, and the scallops that are clamped and held by the set tool are conveyed to a predetermined position by the rotation of the endless chain. When it comes, the motor moves forward, and the scallops being transported with an endless chain are pressed against the rotating drill blade equipped at the tip of the motor to make a hole in the scallop shell. Some scallops are pierced from one to the next by repetitively repeating the scallop shell holes, transporting the scallop shells, moving the motor forward, pressing the scallop shells against the drill blade, and reversing the motor.

  When a hole is made by the motor M, shellfish powder D is generated and adheres around the chuck S of the motor M as shown in FIG. The powder is not particularly problematic when the motor is rotating continuously, but it will harden if left unattended for a day, and the rotating shaft and chuck S will not easily rotate when the motor is restarted. There are many, and it becomes impossible to perform a smooth drilling operation. In the situation described above, the same situation may occur when chips are attached to a metal product or a plastic product. In addition, since the motor M is overheated by continuous rotation for a long time, it is difficult to rotate the motor M for a long time, or if it is operated for a long time, it causes damage or failure.

  The present invention improves the ventilation in the motor and makes it possible to prevent the adhesion of chips and dust, and to prevent overheating.

  According to the motor of the present invention, as described in claim 1, a gas intake port is opened in a motor housing in which a housing space for accommodating a coil and a rotor is formed, and a gas passage is formed in an inner wall of the motor housing. The gas passage communicates with the gas intake port so that the gas taken in from the gas intake port can pass therethrough, and an exhaust port is opened in the motor housing, and the exhaust port can exhaust the gas to the outside of the motor housing. Opened to the outside of the motor housing. In this case, as described in claim 2, the motor is provided with a chuck to which the drill blade can be attached and detached, and the exhaust port can blow away chips and dust generated when drilling with the drill blade by exhausting from the chuck. Opened to the chuck side.

  The punching machine of the present invention is provided with a number of setting tools capable of setting articles one by one on the endless transport body, and transporting the articles set on the set tool by rotation of the endless transport body. A motor equipped with a drill blade for making a hole in the article ahead of the conveying direction of the conveying body is arranged so as to be able to reciprocate, and the article set in the set is conveyed to the motor side by the endless conveying body, and the article is formed by the drill blade. It was possible to drill holes. In this case, as described in claim 4, the endless transport body is transported at a low speed when drilling with a drill blade, and at other times the transport is performed at a higher speed than at a low speed transport. A hole was made by pressing against the drill blade.

In the motor according to claim 1 of the present invention, the gas passage is formed in the motor housing, and the gas supplied into the gas passage is exhausted from the exhaust port formed in the housing to the outside of the motor housing. It has the following effects.
(1) Since the motor is cooled by the gas passing through the gas passage, it is difficult to overheat.
(2) Since the gas passage is formed to be recessed in the wall of the housing, the motor housing does not increase in size even if the gas passage is provided.

  In the motor according to claim 2 of the present invention, the drill blade can be attached to and detached from the motor housing, and the exhaust port is opened on the chuck side of the motor housing. Nearby chips, dust, etc. are blown away and they do not adhere to the rotating shaft.

  In the drilling machine according to claim 3 of the present invention, since the motor equipped with the drill blade is arranged at the tip of the endless transporter that transports the article set in the set tool, By pressing against the drill blade, a hole is automatically drilled in the article. Further, since the gas passes through the gas passage in the motor and is exhausted to the outside from the exhaust port of the motor housing, the motor does not overheat even if the holes are continuously drilled.

  In the punching machine according to claim 4 of the present invention, the endless carrier can be switched between high-speed conveyance and low-speed conveyance, and the article to be conveyed is punched by being pressed against the drill blade during low-speed conveyance. Is less likely to chip or crack, and smooth drilling can be achieved, resulting in fewer drilling defects and improved yield. Since it is transported at high speeds other than drilling, the transport efficiency is also good.

(Embodiment of motor)
An example of an embodiment of a motor of the present invention will be described with reference to FIGS. 1 to 3A and 3B. The illustrated motor is a spindle motor. A housing space 2 is formed inside the motor housing 1, and a coil 3 wound in a cylindrical shape is housed and fixed in the housing space 2. A rotor 5 is accommodated. The rear end portion of the rotating shaft 6 of the rotor 5 is rotatably supported by the rear cover 8 by attaching the rear bearing 7 to the rear cover 8 fixed to the rear end surface of the motor housing 1. 11 is supported by a front bearing 10b (FIG. 1) disposed in a circular recess housing portion 10a (FIG. 3A) at the center of the front lid 10 (this front bearing 10b is shown in FIG. 3A). ) Is not visible because it is covered with a disk 9 on the outside. By fixing the front lid 10 to the front end surface of the motor housing 1, the rotating shaft 6 and the rotor 5 are rotatably supported in the inner space 4 of the coil 3. The front end portion 11 of the rotary shaft 6 penetrates the center portion of the front lid 10 and protrudes forward, and the drill blade 13 can be attached to and detached from the chuck 12 mounted on the front end portion 11.

  A gas intake port 14 is opened on the outer side near the rear end of the motor housing 1, and two elongated arc-shaped groove-shaped gas passages 15 are formed along the axial direction on the inner surface of the motor housing 1. Is opened inside the motor housing 1 so that the gas taken in from the gas inlet 14 flows into the gas passage 15. Each gas passage 15 is formed to be recessed in the inner wall surface of the motor housing 1, and a front end thereof is opened on the front surface in the axial direction of the motor housing 1, and a rear end portion is opened on the rear surface in the axial direction of the motor housing 1.

  A rear cover 8 is fixed to the rear end surface of the motor housing 1 with screws, and the rear surface of the housing space 2 of the motor housing 1 is sealed, and a front lid 10 is fixed to the front end surfaces of the housing 1 with screws 16 to store the motor housing 1. The front face of 2 is sealed. Several air vents 17 and 18 are opened in the disc 9 and the front lid 10, and the gas exhausted from the gas passage 15 flows out from the air vents 17 and 18 to the front of the front lid 10. It is.

  A lid cover 19 is fixed to the front surface of the front lid 10 with screws 20. An insertion hole 21 is opened at the center of the lid cover 19, and the tip end portion 11 of the rotary shaft 6 projects forward from the insertion hole 21, and a chuck 12 to which the drill blade 13 can be attached and detached is provided at the tip end portion 11. Yes. In this case, a gap 22 (FIG. 4) is formed between the insertion hole 21 and the tip end portion 11 of the rotating shaft 6, and the gas flowing out from the vent holes 17 and 18 flows from the gap 22 toward the lid cover 19. It is designed to flow out.

  The chuck 12 is the same as an existing chuck, and includes a chuck body 23 and a holder (commonly referred to as a mill collet) 24 as shown in FIG. A tapered taper hole 25 is opened in the chuck body 23, and an insertion hole 26 is passed through the tip (right side in FIG. 4). The holder 24 has a cylindrical shape whose inner diameter can be expanded and contracted, and has a tapered taper. A drill blade 13 can be inserted into and removed from the tip of the holder 24, and a cap 27 is put on the outer periphery of the tip of the chuck main body 23. The screw 28 is screwed.

  The chuck body 23 covers the outer periphery of the tip end portion 11 of the rotating shaft 6 tapered in the same direction as the tapered hole 25, and a set screw 31 inserted into the insertion hole 26 of the chuck body 23 is attached to the rotating shaft 6. Are fixed by screwing into screw holes 29 formed in the tip portion 11. The holder 24 is inserted into the taper fitting hole 30 of the chuck body 23, and when the cap 27 is rotated forward, the holder 24 is tightened to reduce its inner diameter and is inserted into the holder 24. When the drill blade 13 is tightened and fixed, and the cap 27 is rotated in the reverse direction, the inner diameter of the holder 24 is widened so that the tightening of the drill blade 13 inserted therein is loosened so that the drill blade 13 is removed from the holder 24. It is. As the drill blade 13, one suitable for drilling an article can be used, and one having a different diameter according to the size of the hole to be drilled can be replaced with the chuck 12.

  A windshield 33 is attached to the outer periphery of the chuck body 23. The windshield 33 has a cylindrical shape with a rear opening in which a main body insertion hole 34 is opened at the center. Exhaust gas exhausted from the gap 22 between the lid cover 19 and the rotary shaft 6 collides with the closing surface 35 of the windshield 33. It is prevented from slipping forward and returned to the rear of the windshield 33, diffused to the outer periphery of the windshield 33, and discharged forward.

(Example of motor use)
In order to use the motor of the present invention, the motor connected to the AC power source is rotated by the power cord C (FIG. 2). At this time, it is preferable to increase the rotation speed by an inverter so that the rotation speed of the motor exceeds 30,000 rotations per minute. Next, compressed air is supplied from the air compressor P (FIG. 1) to the gas intake port 14 through the hose H and the nozzle N (FIG. 2). This compressed air is supplied to the housing space 2 of the motor housing 1 and flows into the gas passage 15, passes through the disk 9 and the exhaust ports 17 and 18 of the front lid 10 from the tip of the gas passage 15, and passes through the gap 22. Then, it hits the windshield 33 and returns to the rear, and is diffused to the outer periphery of the windshield 33 and discharged. By this exhaust, chips and dust generated at the time of drilling with the drill blade 13 are blown away.

(Embodiment of drilling machine)
Although it can drill also in shells other than the scallop of the punch of the present invention, as an example, the punch shown in FIG. 5 to FIG. 9 opens a hole in one piece beside the ear B of the scallop A. As shown in FIG. 6, a transport body 40 for continuously transporting scallops A set one by one as shown in FIG. 6, and a hole for making a hole B in the transported shell A as shown in FIGS. 11 (a) and 11 (b) A device case 41 in which an opening device is accommodated is provided. The device case 41 is partitioned into a lower housing portion 42 and an upper housing portion 43, and the carrier 40 has a back portion 38 (FIG. 6) that enters the inside of the lower housing portion 42 and a front portion 39 (FIG. 5) on the bottom. It is outside the accommodating part 42. The cover 44 of the upper accommodating portion 43 is a box shape having a downward opening, and upper corner portions 44a (FIG. 9A) on both side surfaces are curved in an arc shape. An illuminating device 45 such as a fluorescent lamp and a light bulb is attached to the front of the upper housing portion 43, and the illuminating shell 40 is set on the conveying body 40 and other operations by illuminating the lower conveying body 40 with the illumination. It is made easy to do. A cover is provided on the illuminating device 45 to protect the illuminating device 45, and the inner surface of the cover is used as a reflecting surface so that light from the illuminating device 45 is reflected downward. A power switch 46, an adjustment volume 47 for adjusting the conveyance speed of the conveyance body by adjusting the rotation speed of the drive motor, and a power supply indicator lamp (pilot lamp) 48 are provided on the front surface of the upper housing portion 43, and a company name indication seal 49 is stretched.

  The carrier 40 has a number of setting tools 50 on which scallops can be set one by one. The carrier 40 (a chain conveyor in FIG. 6) is attached in large numbers at regular intervals. The set tool 50 is configured such that the movable piece 52 and the fixed piece 53 are opposed to each other to constitute a set, and the scallop A is disposed (set) vertically between the movable piece 52 and the fixed piece 53 with its ears facing down. The movable piece 52 is moved to the fixed piece 53 side when the endless carrier 51 is conveyed to a predetermined position, and the scallop is sandwiched and fixed between the two pieces 52 and 53. The transport body 40 is accommodated in the transport body case 40a and is rotated inside the transport body case 40a. A planar U-shaped handle 40b is attached to both outer side surfaces of the carrier case 40a.

  A motor 55 for drilling is housed in the lower housing part 42. The motor of the present invention shown in FIGS. 1 to 4 is used as the motor 55, and is attached to a bracket 57 below the moving body 69 set on the upper and lower slide rails 68 arranged and fixed in the upper housing portion 43. It is attached and suspended below the ceiling 56 of the lower housing part 42. The motor 55 is driven by an inverter so as to rotate more than 30,000 revolutions per minute. A sprocket 58 for tension is arranged and fixed under the lower housing portion 42. An exhaust fan 60 is attached to the back wall 59 (FIG. 5) of the lower housing part 42. Two round bar-shaped handles 42 a (FIG. 5) are attached in parallel to positions on both sides of the lower wall portion 42 in the width direction outside the back wall 59. Both side plates 42b (FIG. 9B) of the lower housing portion 42 are opened to the upper side outside, and when opened, the locking chain 42c is locked to the ceiling of the upper housing portion 43 so as not to be lowered. Thus, maintenance, inspection, etc. of the equipment accommodated in the lower accommodating portion 42 can be facilitated.

  As shown in FIG. 6, the upper housing portion 43 is divided into a front housing portion 62a and a rear housing portion 62b by a partition plate 61. A driving motor 63, a crankshaft 64, and a crank disk 65 are installed in the front housing portion 62a. The inverter 66 is disposed and fixed in the rear housing portion 62b. The cover 44 (FIG. 9A) of the upper housing portion 43 can be removed upward. By detaching, the inside of the upper accommodating portion 43 becomes a full opening, and maintenance, inspection, etc. of the equipment inside the upper housing portion 43 are facilitated.

  A crank mechanism 67 is connected to the crank plate 65, and when the crank mechanism 67 is operated by the rotation of the crank plate 65, the moving body 69 set on the upper and lower slide rails 68 is moved along the slide rail shaft 68. The hole-drilling motor 55 reciprocates back and forth as it reciprocates back and forth.

  Sprockets 72, 73, and 74 are attached to the rotating shaft 70, the crankshaft 64 of the driving motor 63, and the driving shaft 71 of the endless transport body 51, respectively, and a chain E circulates between these sprockets and the tension sprocket 58. Thus, when the sprocket 70 of the drive motor 63 rotates, all the other sprockets 70 rotate synchronously. As the sprockets rotate, the crank disk 65 rotates, the crank mechanism 67 operates, the drilling motor 55 moves back and forth, and the endless transport body 51 rotates and transports the scallops.

  The drive motor 63 automatically switches between a high-speed rotation and a low-speed rotation. When the scallop is transported, the drive motor 63 rotates at a high speed to move the endless transport body 51 at a high speed. Thus, the endless transport body 51 is moved at a low speed. As the rotational speed is switched, the rotational speed of the crank disk 65 also changes, and accordingly, the reciprocating speed of the drilling motor 55 is switched between high speed movement and low speed movement in synchronization with the transport speed of the endless transport body 51. The transport speed of the endless transport body 51 is set to a speed at which 100 scallops can be drilled per minute, and the low speed travel speed is about 20% of the high speed travel speed. The rotational speed of the drive motor 63 is set by the adjustment volume 47.

(Usage example of drilling machine)
In order to use the drilling machine of the present invention, it is as follows.
1. The drive motor 63 is rotated to cause the endless transport body 51 to travel, and the set tool 50 mounted on the endless transport body 51 is transported. At the same time, the drilling motor 55 is reciprocated back and forth, and the rotary shaft 6 of the motor 55 is rotated to rotate the drill blade 13.
2. An operator sitting in front of the endless transport body 51 sets the scallop A on the set tool 50 being transported one by one in the vertical direction with its ear B facing down.
3. The set scallop A is automatically transported to the drilling motor 55 side by the transport of the endless transport body 51, and when approaching the drilling motor 55, between the movable piece 52 and the fixed piece 53 of the set tool 50. The scallop A is held and fixed.
4). The endless transport body 51 moves at a high speed to the front of the drill blade 13 of the drilling motor 55 to transport the scallop A at a high speed, and switches to a low speed transport just before the drill blade 13. When the drilling motor 55 reaches the most advanced position, the scallop A being conveyed at low speed presses against the drill blade 13 of the motor 55 and is drilled in the ear B of the scallop A.
5. When the drilling is completed, the drilling motor 55 moves backward and comes out of the scallop A.
6). The scallop A, which has been drilled, wraps around the endless transport body 51 while being pinched and held by the transport of the endless transport body 51, turns downward, and is pinched by the set tool 50 when it reaches a predetermined position. The holding is released and the set tool 50 falls into the lower collection container.
7). The scallop A set in the setting tool 50 as described in 2 above is sequentially conveyed to the drilling motor 55 side by the repetition of the high-speed conveyance-low-speed conveyance of the endless conveyance body 51, and is drilled from one to the next. .

  Gas is supplied from an air compressor to the gas intake port 14 of the motor 55 for drilling, which passes through the inside of the motor housing 1 and is ejected from the cover cover 19 to the drill blade 13 side to generate chips and dust. It is blown away and does not stick around the rotating shaft of the motor. Further, the fan 60 (FIG. 5) attached to the lower housing part 42 rotates and chips and dust are discharged out of the device case 40.

  The motors according to claims 1 and 2 of the present invention can be used in various fields other than drilling, such as prevention of overheating and prevention of adhesion of facets and dust. The punching machine of the present invention can be used in fields other than drilling holes in other shellfish, holes in articles other than shellfish, and holes.

Sectional drawing which shows an example of the motor of this invention. The exploded explanatory view of the motor of the present invention. (A) is the disassembled perspective view which looked at the rotating shaft front-end part of a rotor, the bearing, and the front cover from the back side of the front cover, (b) is assembly of the rotating shaft front-end part, bearing, and front cover of (a). The back side perspective view after. Sectional drawing of the front cover and chuck | zipper part of the motor of this invention. The schematic side view of the drilling machine of this invention. The side sectional view at the time of motor advance of the drilling machine of the present invention. FIG. 3 is a side sectional view of the drilling machine according to the present invention during motor advancement and drilling. The side sectional view at the time of motor retraction of the drilling machine of the present invention. (A) is a front schematic diagram of the drilling machine of the present invention, (b) is a front view of a state in which both side plates of the lower housing portion of the drilling machine are opened upward and locked with a chain. Schematic of the state in which cutting powder adhered to a conventional motor. (A) is a front view of a scallop with a hole, and (b) is a side view thereof.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Motor housing 2 Accommodating space 3 Coil 4 Coil inner space 5 Rotor 6 Rotor rotating shaft 7 Rear bearing 8 Rear lid 9 Disc 10 Front lid 10a Recessed housing portion 10b Front bearing 11 Rotary shaft tip 12 Chuck 13 Drill blade 14 Gas inlet 15 Gas passage 16 Screw 17 Disc vent 18 Front lid vent 19 Lid cover 20 Screw 21 Lid cover insertion hole 22 Gap 23 Chuck body 24 Holder (Milcollet)
25 Taper hole 26 Insertion hole of chuck main body 27 Cap 28 Outer peripheral screw 29 Screw hole 30 Taper fitting hole 31 Set screw 33 Windshield 34 Main body insertion hole 35 Closed surface of windshield 38 Back part of transport body 39 Front part of transport body 40 Transport Body 40a Transport body case 40b Transport body handle 41 Equipment case 42 Lower housing portion 42a Lower housing portion handle 42b Both side plates 42c Locking chain 43 Upper housing portion 44 Cover 44a Upper corners on both sides of the cover 45 Illuminator 46 Power switch 47 Adjustment volume 48 Power indicator lamp (pilot lamp)
49 Company name display sticker 50 Set tool 51 Endless carrier 52 Movable piece 53 Fixed piece 55 Motor for drilling 56 Ceiling 57 Bracket 58 Tension sprocket 59 Back wall of lower housing part 60 Fan 61 Partition plate 62a Front housing part 62b Rear Housing 63 Driving motor 64 Crank shaft 65 Crank disc 66 Inverter 67 Crank mechanism 68 Slide rail 69 Moving body 70 Rotating shaft 71 Drive shaft 72, 73, 74 Sprocket A Scallop B Scallop ear C Power cord D Powder E Chain H hose M motor N nozzle P air compressor S chuck

Claims (4)

  A gas intake port is opened in a motor housing in which a housing space for accommodating a coil and a rotor is formed, a gas passage is formed in the inner wall of the motor housing, and the gas passage is a gas taken in from the gas intake port. The exhaust port is open to the motor housing, and the exhaust port opens to the outside of the motor housing so that the gas can be exhausted to the outside of the motor housing. motor.   2. The motor according to claim 1, wherein the motor is provided with a chuck to which the drill blade can be attached and detached, and the exhaust port is provided on the chuck side so that chips and dust generated when drilling with the drill blade can be blown away by exhausting from the chuck. A motor characterized in that it is opened.   A motor equipped with a number of setting tools capable of setting articles one by one on the endless transport body, the articles set on the set tool being transported by the rotation of the endless transport body, and a drill blade mounted on the end in the transport direction of the endless transport body Is a drilling machine for an article in which an article set in a set tool is conveyed to the motor side by an endless conveyance body, and an insertion hole is made in the article with the drill blade, and the motor A drilling machine comprising the motor according to claim 1 or 2.   4. The punching machine according to claim 3, wherein the endless transport body is transported at a low speed when drilling with a drill blade, and is transported at a higher speed than at a low speed transport at other times, and an article transported by the endless transport body is transported at a low speed transport. A drilling machine characterized by being drilled by being pressed against a drill blade.

Images