CN107553602B - Direct driving device of electric saw - Google Patents
Direct driving device of electric saw Download PDFInfo
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- CN107553602B CN107553602B CN201710990014.6A CN201710990014A CN107553602B CN 107553602 B CN107553602 B CN 107553602B CN 201710990014 A CN201710990014 A CN 201710990014A CN 107553602 B CN107553602 B CN 107553602B
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Abstract
A direct drive device of an electric saw belongs to the technical field of electric saws and comprises a shaft, a permanent magnet, a saw blade, a stator iron core, an armature winding and a shell; the circumference of the saw blade fixed on the shaft is uniformly provided with 10 fan-shaped through holes, and a saw blade rib made of magnetic conductive material is arranged between the two through holes; the stator iron core is composed of six pairs of stator iron cores, each pair of stator iron cores are symmetrically distributed on two sides of the saw blade and fixed on the shell, one side of each stator iron core, facing the saw blade, is provided with a fan-shaped convex armature pole, a permanent magnet is fixed between the two stator iron cores of the same pair, and a centralized armature winding is wound on each stator iron core. The technology effectively realizes the integration of the electric saw driving motor and the saw blade, and saves the space and the cost. The technique of this application both can be applicable to the bench saw, can be applicable to the electric circular saw again.
Description
Technical Field
A direct drive device of an electric saw belongs to the technical field of electric saws.
Background
At present, artificial boards are widely used as base materials in furniture, indoor and outdoor decorations, product shells and the like. The demand for various sawing devices is therefore increasing. In the production of wooden products, the wooden products are often required to be cut, and the wooden products are sawn into certain shapes or angles, but the traditional woodworking circular sawing machine cannot meet the production requirements in the aspects of processing precision, results, structural forms, production efficiency and the like. Various table saws with a high degree of automation have been rapidly developed.
Before a precise bench saw is not introduced, the common circular saw is used for a long time in China, and the operations of cutting, trimming and the like are manually completed, so that the problems of poor product quality, low precision and the like are caused. After the introduction of the precision bench saw from the end of the 80 s of the last century, China carries out digestion and absorption on the technology and carries out innovation.
But for small and medium-sized wood processing enterprises, the large-scale use of the bench saw with higher automation degree is difficult, so that the market development of the bench saw and the wood processing enterprises is limited. Accordingly, there is a need for innovations in the art of table saws that reduce the cost of manufacturing the table saw.
The direct table saw driving device can omit a series of transmission devices between the motor and the saw blade, thereby saving the production cost and reducing the space of the table saw. Has higher research value and application prospect.
At present, related patents at home and abroad are few. In the granted utility model patent: the bench saw motor frame structure is 201420034981.7, and the connecting piece and the frame only need to be connected through a pin or screw, and is very convenient, thereby improving the assembly efficiency and reducing the preparation cost. Meanwhile, the integrally formed connecting frame is fixed on the motor through the screw, so that the motor and the connecting frame form an integral structure, and the lifting of the motor is completed through the screw and nut mechanism, so that the connecting frame is stably connected with the motor, and the use stability of the table saw is improved.
The patent of the application for invention: the bench saw, application number is: 200810194520.5, discloses a table saw capable of simplifying the cumbersome operations involved in the rough machining of the table saw. The saw blade is driven by the first motor to perform a cutting action, and at least part of the saw blade protrudes out of the working surface of the workbench when the saw blade performs cutting, an electric planer is detachably mounted on the working surface and comprises a second motor and a cutter shaft which is driven by the second motor and rotates around the longitudinal axis of the cutter shaft. However, the transmission devices such as belts, belt wheels, guide wheels and the like are needed between the saw blade and the motor, so that the volume of the table saw is still large, and the high integration of the saw blade and the motor is not realized.
The direct drive device of the electric saw disclosed by the invention is technically different from the direct drive device of the electric saw in the above application, and has creativity in a specific motor body structure (the saw blade is used as a motor rotor, and the integration of the saw blade and a motor is realized).
Disclosure of Invention
The invention aims to effectively integrate the table saw driving motor and the saw blade, and reduce the complex transmission device between the original motor and the saw blade so as to save the space and the manufacturing cost of the table saw. The technical scheme of the invention is as follows:
a kind of electric saw direct drive unit, characterized by that: the motor consists of a shaft, a permanent magnet, a saw blade, a stator core, an armature winding and a shell;
the circumference of the saw blade fixed on the shaft is uniformly provided with 10 fan-shaped through holes, and a saw blade rib made of magnetic conductive material is arranged between the two through holes; the shell is connected with the shaft through a bearing;
the periphery of the saw blade is sequentially provided with 6 Contraband-shaped sub-stator iron cores along the circumferential direction, and the sub-stator iron cores are fixed on the shell;
each sub stator iron core is provided with two stator teeth extending towards the axis, the side surfaces of the stator teeth are in a fan shape, and the difference between adjacent sub stator iron cores is 30 degrees along the circumferential direction; the 6 sub-stator iron cores form a semicircle below the shaft; two stator teeth of the sub stator iron core are symmetrically distributed on two sides of the saw blade;
the yoke part in the middle of the sub-stator iron core is parallel to the axis and is embedded with a permanent magnet; the magnetizing directions of the adjacent permanent magnets are opposite;
a centralized armature winding is wound at the root of each stator tooth of the sub-stator iron core, and the winding directions of the two armature windings on the same sub-stator iron core are opposite; the winding directions of the armature windings on the adjacent pair of stator cores are opposite.
A kind of electric saw direct drive unit, characterized by that:
the magnetic field generator consists of a bearing, an armature winding, an excitation winding, a saw blade, a stator core, a shell and a shaft;
16 fan-shaped through holes are uniformly distributed on the circumference of the saw blade fixed on the shaft, and saw blade ribs made of magnetic materials are arranged between the two through holes; the shell is connected with the shaft through a bearing;
the periphery of the saw blade is sequentially provided with 6 Contraband-shaped sub-stator iron cores along the circumferential direction, and the sub-stator iron cores are fixed on the shell;
each sub stator iron core is provided with two stator teeth extending towards the axis, the side surfaces of the stator teeth are in a fan shape, and the difference between adjacent sub stator iron cores is 30 degrees along the circumferential direction; 6 sub-stator cores form a semicircle above the shaft; two stator teeth of the sub stator iron core are symmetrically distributed on two sides of the saw blade;
a yoke part in the middle of the sub-stator core is parallel to the axis, and an excitation winding is wound on the yoke part;
and a centralized armature winding is wound at the root of each stator tooth of the sub-stator iron core, and the winding directions of the two armature windings on the same sub-stator iron core are opposite.
The electric saw direct drive device is characterized in that:
the excitation winding is wound around the yoke parts of the six sub-stator iron cores; the winding directions of the armature windings adjacent in the circumferential direction are the same.
The electric saw direct drive device is characterized in that:
the excitation windings are wound around the yoke portion of each sub-stator core, the winding directions of adjacent excitation windings are opposite, and the winding directions of adjacent armature windings in the circumferential direction are opposite.
The invention has the following beneficial effects:
(1) the invention integrates the electric saw driving motor and the saw blade, reduces the transmission elements between the original saw blade and the motor, and reduces the production cost of the electric saw;
(2) because the transmission device is reduced, the volume of the electric saw can be reduced, and the electric saw is suitable for small and medium-sized wood processing enterprises;
(3) the direct drive device of the electric saw is combined with the control circuit to specifically adjust the cutting of the electric saw;
(4) the windings of all phases are completely isolated, the excitation winding (permanent magnet) and the armature winding are isolated, and the short-circuit current cannot cause the propagation of faults, so that the reliability is improved;
(5) the excitation winding (permanent magnet) and the armature winding are easy to dissipate heat and can be suitable for a high-temperature operation environment;
(6) the technique of this application both can be applicable to the bench saw, can be applicable to the electric circular saw again.
Drawings
Fig. 1 is a schematic structural view of an embodiment of a direct drive apparatus for an electric saw according to the present invention. In the figure, 1, axis; 2. a stator core; 3. a saw blade; 4. a permanent magnet; 5. an armature winding; 6. a housing; 7. a platen; 8. and a bearing.
Fig. 2 is a side view of an embodiment of a direct drive for a power saw according to the present invention. In the figure, 2, a stator core; 4. a permanent magnet; 5. an armature winding.
FIG. 3 is a diagram of a saw blade of an embodiment of a direct table saw drive of the present invention, wherein 1, shaft, 3, saw blade.
Fig. 4 is a schematic diagram of a second embodiment of a direct drive for an electric saw. In the figure, 1, axis; 2. a bearing; 3. an armature winding; 4. a saw blade; 5. an excitation winding; 6. a stator core is provided.
Fig. 5 is a view of two saw blades of an embodiment of a direct drive mechanism for an electric saw. Wherein 1, a shaft, 4 and a saw blade.
FIG. 6 is a side view of an embodiment of a direct table saw drive, wherein 1, shaft, 3, blade. In the figure, 5, excitation winding; 6. a stator core is provided.
Detailed Description
A first embodiment of a direct drive apparatus for an electric saw as shown in fig. 1 is composed of a shaft, a permanent magnet, a saw blade, a stator core, an armature winding and a housing;
the circumference of the saw blade fixed on the shaft is uniformly provided with 10 fan-shaped through holes, and a saw blade rib made of magnetic conductive material is arranged between the two through holes; the shell is connected with the shaft through a bearing; a bedplate is fixed above the shell.
The periphery of the saw blade is sequentially provided with 6 Contraband-shaped sub-stator iron cores along the circumferential direction, and the sub-stator iron cores are fixed on the shell;
each sub stator iron core is provided with two stator teeth extending towards the axis, the side surfaces of the stator teeth are in a fan shape, and the difference between adjacent sub stator iron cores is 30 degrees along the circumferential direction; the 6 sub-stator iron cores form a semicircle below the shaft; two stator teeth of the sub stator iron core are symmetrically distributed on two sides of the saw blade;
the yoke part in the middle of the sub-stator iron core is parallel to the axis and is embedded with a permanent magnet; the magnetizing directions of the adjacent permanent magnets are opposite;
a centralized armature winding is wound at the root of each stator tooth of the sub-stator iron core, and the winding directions of the two armature windings on the same sub-stator iron core are opposite; the winding directions of the armature windings on the adjacent pair of stator cores are opposite.
As shown in fig. 2, in a side view of an embodiment of the direct drive device for an electric saw according to the present invention, there are 6 Contraband-shaped sub-stator cores sequentially arranged along the circumference of the saw blade, and the sub-stator cores are fixed on the housing;
each sub stator iron core is provided with two stator teeth extending towards the axis, the side surfaces of the stator teeth are in a fan shape, and the difference between adjacent sub stator iron cores is 30 degrees along the circumferential direction; the 6 sub-stator iron cores form a semicircle below the shaft; two stator teeth of the sub stator iron core are symmetrically distributed on two sides of the saw blade;
the yoke part in the middle of the sub-stator iron core is parallel to the axis and is embedded with a permanent magnet; the magnetizing directions of the adjacent permanent magnets are opposite.
As shown in FIG. 3, a side view of a saw blade of an embodiment of a direct table saw driving device, wherein 10 fan-shaped through holes are uniformly distributed on the circumference of the saw blade, and a saw blade rib made of magnetic conductive material is arranged between the two through holes; the fan-shaped end surfaces of the armature poles and the fan-shaped through holes of the saw blade are aligned in the radial direction.
Fig. 4 is a schematic diagram of a second embodiment of a direct drive for an electric saw. The motor consists of a bearing, an armature winding, an excitation winding, a saw blade, a stator core, a shell and a shaft.
16 fan-shaped through holes are uniformly distributed on the circumference of the saw blade fixed on the shaft, and saw blade ribs made of magnetic materials are arranged between the two through holes; the housing is connected with the shaft through a bearing.
The periphery of the saw blade is sequentially provided with 6 Contraband-shaped sub-stator cores along the circumferential direction, and the sub-stator cores are fixed on the shell.
Each sub stator iron core is provided with two stator teeth extending towards the axis, the side surfaces of the stator teeth are in a fan shape, and the difference between adjacent sub stator iron cores is 30 degrees along the circumferential direction; 6 sub-stator cores form a semicircle above the shaft; two stator teeth of the sub stator iron core are symmetrically distributed on two sides of the saw blade. The yoke part in the middle of the sub-stator core is parallel to the axis, and the excitation winding is wound on the yoke part.
And a centralized armature winding is wound at the root of each stator tooth of the sub-stator iron core, and the winding directions of the two armature windings on the same sub-stator iron core are opposite.
Fig. 5 is a view of two saw blades of an embodiment of a direct drive mechanism for an electric saw. 16 fan-shaped through holes are uniformly distributed on the circumference of the saw blade fixed on the shaft, and saw blade ribs made of magnetic materials are arranged between the two through holes; the housing is connected with the shaft through a bearing.
FIG. 6 is a side view of an embodiment of a direct table saw drive. The periphery of the saw blade is sequentially provided with 6 Contraband-shaped sub-stator iron cores along the circumferential direction, and the sub-stator iron cores are fixed on the shell; each sub stator iron core is provided with two stator teeth extending towards the axis, the side surfaces of the stator teeth are in a fan shape, and the difference between adjacent sub stator iron cores is 30 degrees along the circumferential direction; the 6 sub-stator cores are formed into a semicircular shape above the shaft. The excitation winding is wound around the yoke parts of the six sub-stator iron cores; the winding directions of the armature windings adjacent in the circumferential direction are the same.
Similarly, the field windings may be wound around the yoke portion of each sub-stator core, with adjacent field windings being wound in opposite directions and adjacent armature windings being wound in opposite directions in the circumferential direction.
The working principle of the electric saw direct driving device is as follows:
because the magnetic-conductive saw blade and the armature pole are aligned, when the magnetic-conductive part of the saw blade is aligned with the armature pole, the reluctance of the armature pole turn chain is minimum, and the magnetic chain of the phase armature winding is maximum; when the fan-shaped through holes of the saw blade are aligned with the armature poles, the reluctance of the armature pole coil linkage is the largest, and the armature winding flux linkage is the smallest.
When the part of the saw blade which can conduct magnetism is gradually close to the armature pole, the self-inductance of the phase armature winding is increased; when the magnetically permeable portion of the saw blade disengages from the armature pole, the self-inductance of the phase armature winding is also reduced. Due to the ingenious combination of the number of the saw blade fan-shaped through holes and the number of the armature poles, the armature winding on each sub-stator iron core has a unique phase.
Because the mutual inductance of the armature winding of the motor and the flux linkage of the armature winding turn chain are continuously changed, if the permanent magnet can provide an excitation magnetic field and move the rotor core, the armature winding can generate induced electromotive force. This is the principle of the present application of the operation of an electrical machine as a generator.
When the motor is used as a motor, forward current is conducted to a phase winding generating positive induced electromotive force, and the winding can generate positive torque; a phase winding that generates a negative induced electromotive force is energized with a positive current, and the winding can generate a negative torque.
Claims (4)
1. A kind of electric saw direct drive unit, characterized by that:
the motor consists of a shaft, a permanent magnet, a saw blade, a stator core, an armature winding and a shell;
the circumference of the saw blade fixed on the shaft is uniformly provided with 10 fan-shaped through holes, and a saw blade rib made of magnetic conductive material is arranged between the two through holes; the shell is connected with the shaft through a bearing;
the periphery of the saw blade is sequentially provided with 6 Contraband-shaped sub-stator iron cores along the circumferential direction, and the sub-stator iron cores are fixed on the shell;
each sub stator iron core is provided with two stator teeth extending towards the axis, the side surfaces of the stator teeth are in a fan shape, and the difference between adjacent sub stator iron cores is 30 degrees along the circumferential direction; the 6 sub-stator iron cores form a semicircle below the shaft; two stator teeth of the sub stator iron core are symmetrically distributed on two sides of the saw blade;
the yoke part in the middle of the sub-stator iron core is parallel to the axis and is embedded with a permanent magnet; the magnetizing directions of the adjacent permanent magnets are opposite;
a centralized armature winding is wound at the root of each stator tooth of the sub-stator iron core, and the winding directions of the two armature windings on the same sub-stator iron core are opposite; the winding directions of the armature windings on the adjacent pair of stator cores are opposite.
2. A kind of electric saw direct drive unit, characterized by that:
the magnetic field generator consists of a bearing, an armature winding, an excitation winding, a saw blade, a stator core, a shell and a shaft;
16 fan-shaped through holes are uniformly distributed on the circumference of the saw blade fixed on the shaft, and saw blade ribs made of magnetic materials are arranged between the two through holes; the shell is connected with the shaft through a bearing;
the periphery of the saw blade is sequentially provided with 6 Contraband-shaped sub-stator iron cores along the circumferential direction, and the sub-stator iron cores are fixed on the shell;
each sub stator iron core is provided with two stator teeth extending towards the axis, the side surfaces of the stator teeth are in a fan shape, and the difference between adjacent sub stator iron cores is 30 degrees along the circumferential direction; 6 sub-stator cores form a semicircle above the shaft; two stator teeth of the sub stator iron core are symmetrically distributed on two sides of the saw blade;
a yoke part in the middle of the sub-stator core is parallel to the axis, and an excitation winding is wound on the yoke part;
and a centralized armature winding is wound at the root of each stator tooth of the sub-stator iron core, and the winding directions of the two armature windings on the same sub-stator iron core are opposite.
3. A direct drive for an electric saw as defined in claim 2, wherein:
the excitation winding is wound around the yoke parts of the six sub-stator iron cores; the winding directions of the armature windings adjacent in the circumferential direction are the same.
4. A direct drive for an electric saw as defined in claim 2, wherein:
the excitation windings are wound around the yoke portion of each sub-stator core, the winding directions of adjacent excitation windings are opposite, and the winding directions of adjacent armature windings in the circumferential direction are opposite.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710990014.6A CN107553602B (en) | 2017-10-23 | 2017-10-23 | Direct driving device of electric saw |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710990014.6A CN107553602B (en) | 2017-10-23 | 2017-10-23 | Direct driving device of electric saw |
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| Publication Number | Publication Date |
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| CN107553602A CN107553602A (en) | 2018-01-09 |
| CN107553602B true CN107553602B (en) | 2020-05-19 |
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| CN201710990014.6A Active CN107553602B (en) | 2017-10-23 | 2017-10-23 | Direct driving device of electric saw |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| DE102022101073A1 (en) * | 2022-01-18 | 2023-07-20 | Wacker Neuson Produktion GmbH & Co. KG | material separator |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102005062739B3 (en) * | 2005-12-22 | 2007-06-28 | Raimann Holzoptimierung Gmbh & Co.Kg | Sawing fixture, has electromagnetic drive exhibiting stator for generating electromagnetic field, where ring circular saw blade is formed as rotor that is displaceable in rotary motion by electromagnetic field of stator |
| CN101546927A (en) * | 2009-04-23 | 2009-09-30 | 南京航空航天大学 | [-shaped modular stator segmentation rotor switched reluctance motor |
| DE202009012444U1 (en) * | 2009-09-16 | 2011-02-10 | Wilhelm Altendorf Gmbh & Co. Kg | Panel saw with direct drive |
| DE102012200882A1 (en) * | 2012-01-23 | 2013-07-25 | Robert Bosch Gmbh | Blade for rotor of electric machine i.e. hand-held power tool such as Fret saw, has blade segment arranged adjacent to permanent magnets, where permanent magnets in terminal lug are fixed in tangential direction of set of recesses |
| CN104190507A (en) * | 2014-09-04 | 2014-12-10 | 河南工业大学 | Self-driven rasping machine |
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Effective date of registration: 20181224 Address after: 266000 Wang Siwenzhuan, Department of Logistics, Shandong Vocational College of Foreign Trade, 201 Jufeng Road, Licang District, Qingdao City, Shandong Province Applicant after: Shi Zhengqi Address before: 255090 Karen garden, Ma Shang Town, Zhangdian District, Zibo City, Zibo, Shandong 34, 419 Applicant before: Shi Liwei |
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Effective date of registration: 20200407 Address after: Longshan office Yang Shan Kuang village of Jimo city 266000 Shandong city of Qingdao Province Applicant after: QINGDAO HAORUN WOOD EQUIPMENT Co.,Ltd. Address before: 266000 Wang Siwenzhuan, Department of Logistics, Shandong Vocational College of Foreign Trade, 201 Jufeng Road, Licang District, Qingdao City, Shandong Province Applicant before: Shi Zhengqi |
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