CN203863137U - Circular saw - Google Patents

Circular saw Download PDF

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Publication number
CN203863137U
CN203863137U CN201420288509.6U CN201420288509U CN203863137U CN 203863137 U CN203863137 U CN 203863137U CN 201420288509 U CN201420288509 U CN 201420288509U CN 203863137 U CN203863137 U CN 203863137U
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CN
China
Prior art keywords
casing
power density
high power
electric machine
cutting blade
Prior art date
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Expired - Fee Related
Application number
CN201420288509.6U
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Chinese (zh)
Inventor
应时立
周加泽
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Zhejiang Lv Dong Motor Science And Technology Ltd
Original Assignee
Zhejiang Lv Dong Motor Science And Technology Ltd
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Priority to CN201420288509.6U priority Critical patent/CN203863137U/en
Application granted granted Critical
Publication of CN203863137U publication Critical patent/CN203863137U/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Abstract

The utility model discloses a circular saw which comprises a machine shell (7) and further comprises a motor shell (1) arranged in the machine shell (7) and fixedly connected with the side wall of the machine shell (7). A high-power density brushless motor is arranged in the motor shell (1), and a controller of the high-power density brushless motor is arranged in the machine shell (7). The high-power density brushless motor comprises a rotor shaft (2) rotationally arranged in the motor shell (1), and the rotor shaft (2) and a driving shaft of an electric saw cutting sheet (6) of the circular saw are coaxially arranged and are of an integrated structure. The axial line of the rotor shaft (2) is perpendicular to the plane where the electric saw cutting sheet (6) is located and passes through the circle center of the electric saw cutting sheet (6). The circular saw prevents carbon dust from being generated and prevents the environment from being polluted; a transmission device does not need to be arranged in the machine shell, the service life is prolonged, energy losses are lowered, output efficiency is improved, noise and vibration are lowered, the trouble of meshed mounting of transmission gears is saved, the volume and the weight are reduced, and the circular saw is convenient to assemble.

Description

Annular saw
Technical field
The utility model relates to electric saw equipment technical field, particularly a kind of annular saw.
Background technology
Annular saw is a kind of electric tool, and polished fabric or other article complete polishing effect by the polishing disk of annular saw.
Please refer to Fig. 1, the structural representation that Fig. 1 is a kind of annular saw of the prior art.
Wherein, annular saw by casing 01, output shaft 02, be arranged at travelling gear 08 on output shaft 02, be arranged at the electric saw cutting blade 06 of output shaft 02 end and the motor with carbon brush (comprising stator 03, rotor 04, motor shaft 05 and carbon brush 07) forms.Motor is arranged in casing 01, and motor shaft 05 is for gear shaft or gear is set in its end, and output shaft 02 is engaged by travelling gear with motor shaft 05, and then is rotated complete operation by the electric saw cutting blade 06 that driven by motor is arranged at output shaft 02 end.
But current annular saw generally uses series excited machine, it needs gear drive to realize the change of transmission direction and rotating speed with the structure of carbon brush 07 between motor shaft 05 and output shaft 02.This makes the energy loss of annular saw large, reduced the delivery efficiency of instrument, and the wearing and tearing of carbon brush 07 and travelling gear directly affects the service life of annular saw, and carbon brush 07 wearing and tearing generation carbon dust, and environment has been caused to certain pollution; Parts in annular saw are more, and intermeshing travelling gear inevitably can produce larger noise and vibration in the process of passing on Gong, and are not easy to the assembling of annular saw.
Therefore, how improving delivery efficiency and service life, avoid environmental pollution, reduce noise and vibration, be convenient to the assembling of annular saw, is the art personnel problem demanding prompt solutions.
Utility model content
In view of this, the utility model provides a kind of annular saw, to improve delivery efficiency and service life, avoids environmental pollution, reduces noise and vibration, is convenient to the assembling of annular saw.
For achieving the above object, the utility model provides following technical scheme:
A kind of annular saw, comprise casing, also comprise and be arranged in described casing and the motor casing being fixedly connected with the sidewall of described casing, in described motor casing, be provided with high power density brushless electric machine, the controller of described high power density brushless electric machine is arranged in described casing;
Described high power density brushless electric machine comprises rotating and is arranged at the armature spindle of described motor casing, and the driving shaft of described armature spindle and the electric saw cutting blade of described annular saw is coaxial arranges and be integral type structure;
The axis of described armature spindle is perpendicular to the center of circle of described electric saw cutting blade place plane and the described electric saw cutting blade of process.
Preferably, in above-mentioned annular saw, also comprise the fan being arranged on described armature spindle.
Preferably, in above-mentioned annular saw, described fan is arranged at the side of described rotor core near described electric saw cutting blade; Or described fan is arranged at the side of described rotor core away from described electric saw cutting blade; Or the quantity of described fan is two, one is positioned at the side of described rotor core near described electric saw cutting blade, and another is positioned at the side of described rotor core away from described electric saw cutting blade.
Preferably, in above-mentioned annular saw, described high power density brushless electric machine is without Hall internal rotor high power density brushless electric machine;
Described high power density brushless electric machine also comprises: be sheathed on the rotor core in described armature spindle outside, be arranged at the stator in described rotor core outside, be arranged at the permanent magnet between described stator and described rotor core.
Preferably, in above-mentioned annular saw, described stator comprises stator core, is multiplely wound in the stator enamelled wire group in described stator core and is arranged at the cold air duct in described stator core.
Preferably, in above-mentioned annular saw, described cold air duct is made up of the gap between adjacent two described stator enamelled wire groups and the gap between described stator core and described rotor core.
Preferably, in above-mentioned annular saw, also comprise the power line for being connected with extraneous power frequency AC and be arranged at rectification and the filter in described casing;
Between described rotor core and described armature spindle, be provided with insulating sleeve.
Preferably, in above-mentioned annular saw, described motor casing is plastic motor shell.
Preferably, in above-mentioned annular saw, driving the power supplier of described high power density brushless electric machine operation is power brick.
Preferably, in above-mentioned annular saw, described power brick is arranged in described casing; Or described power brick is arranged at outside described casing, on described casing, be provided with the interface being connected with described power brick.
Can find out from above-mentioned technical scheme, the annular saw that the utility model provides, drives electric saw cutting blade to rotate by high power density brushless electric machine is set, and has effectively improved the service life of device; And, due to high power density brushless electric machine being set, the driving shaft of armature spindle and electric saw cutting blade is coaxially arranged, and armature spindle and electric saw cutting blade be set to integral structure, avoided arranging transmission device in casing, further improve service life, and, avoid carbon dust to produce, and then avoided environmental pollution, reduce energy loss, improved delivery efficiency.Because armature spindle and electric saw cutting blade are integral type structure, effectively avoid the engagement between travelling gear, and then reduced the noise and the vibration that produce because of gear drive.And, because electric saw cutting blade is disk, the axis of armature spindle is the center of circle through electric saw cutting blade perpendicular to the operating surface of electric saw cutting blade and the axis of armature spindle, makes the smooth rotation of electric saw cutting blade, has reduced and has rotated the noise and the vibration that produce because of electric saw cutting blade.And the controller of high power density brushless electric machine is arranged in casing, effectively avoided controller external and cause make greatly unhandy situation because taking up an area space, so that the use of annular saw, high power density brushless electric machine is arranged in motor casing, the armature spindle that high power density brushless electric machine is established is set up in motor casing, and controller is arranged in casing, by after high power density brushless electric machine and controller communication connection, install relative with casing motor casing again, avoid the loaded down with trivial details of travelling gear engagement installation, volume and the weight of annular saw are effectively reduced, effectively facilitate the assembling of annular saw.
Brief description of the drawings
In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is only embodiment more of the present utility model, for those of ordinary skill in the art, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is a kind of structural representation of annular saw of the prior art;
Wherein,
Casing-01, output shaft-02, stator-03, rotor-04, motor shaft-05, electric saw cutting blade-06, carbon brush-07;
The structural representation of the annular saw that Fig. 2 provides for the utility model embodiment;
The structural representation of the high power density brushless electric machine that Fig. 3 provides for the utility model embodiment.
Wherein,
Motor casing-1, armature spindle-2, rotor core-3, stator-4, stator core-41, stator enamelled wire group-42, cold air duct-43, controller-5, electric saw cutting blade-6, casing-7, permanent magnet-8, fan-9, insulating sleeve-10.
Detailed description of the invention
The utility model discloses a kind of annular saw, to improve delivery efficiency and service life, avoid environmental pollution, reduce noise and vibration, be convenient to the assembling of annular saw.
Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the utility model embodiment is clearly and completely described, obviously, described embodiment is only the utility model part embodiment, instead of whole embodiment.Based on the embodiment in the utility model, those of ordinary skill in the art are not making the every other embodiment obtaining under creative work prerequisite, all belong to the scope of the utility model protection.
Please refer to Fig. 2, the structural representation of the annular saw that Fig. 2 provides for the utility model embodiment.
The utility model embodiment provides a kind of annular saw, comprise casing 7, also comprise and be arranged in casing 7 and the motor casing 1 being fixedly connected with the sidewall of casing 7, in motor casing 1, be provided with high power density brushless electric machine, the controller 5 of high power density brushless electric machine is arranged in casing 7; High power density brushless electric machine comprises rotating and is arranged at the armature spindle 2 of motor casing 1, and the driving shaft of armature spindle 2 and the electric saw cutting blade 6 of annular saw is coaxial arranges and be integral type structure; The axis of armature spindle 2 is perpendicular to the center of circle of electric saw cutting blade 6 place planes and process electric saw cutting blade 6.
The annular saw that the utility model embodiment provides, drives electric saw cutting blade 6 to rotate by high power density brushless electric machine is set, and has effectively improved the service life of device; And, due to high power density brushless electric machine being set, armature spindle 2 and the driving shaft of electric saw cutting blade 6 are coaxially arranged, and armature spindle 2 and electric saw cutting blade 6 are set to integral structure, avoided at the interior transmission device that arranges of casing 7, further improve service life, and, avoid carbon dust to produce, and then avoided environmental pollution, reduce energy loss, improved delivery efficiency.Because armature spindle 2 is integral type structure with electric saw cutting blade 6, effectively avoid the engagement between travelling gear, and then reduced the noise and the vibration that produce because of gear drive.And, because electric saw cutting blade 6 is disk, the axis of armature spindle 2 is the center of circle through electric saw cutting blade 6 perpendicular to the operating surface of electric saw cutting blade 6 and the axis of armature spindle 2, makes the smooth rotation of electric saw cutting blade 6, has reduced and has rotated the noise and the vibration that produce because of electric saw cutting blade 6.And the controller of high power density brushless electric machine 5 is arranged in casing 7, effectively avoided controller 5 external and cause make greatly unhandy situation because taking up an area space, so that the use of annular saw, high power density brushless electric machine is arranged in motor casing 1, the armature spindle 2 that high power density brushless electric machine is established is set up in motor casing 1, and controller 5 is arranged in casing 7, after high power density brushless electric machine and controller 5 are communicated to connect, again by relative with casing 7 motor casing 1 installation, avoid the loaded down with trivial details of travelling gear engagement installation, volume and the weight of annular saw are effectively reduced, effectively facilitate the assembling of annular saw.
Refer to following data:
The comparing data of the brushless electric machine of table 1 series excited machine of the prior art and the utility model embodiment
And by finding out in table, the annular saw in the utility model embodiment compared with prior art, has improved delivery efficiency and the service life of motor, has reduced noise.
High power density brushless electric machine in the annular saw providing for fear of the utility model embodiment is overheated and affect service life, also comprises the fan 9 being arranged on armature spindle 2.In the process of high power density brushless electric machine operation, armature spindle 2 drives fan 9 to rotate when rotation, thereby to the operation of dispelling the heat of high power density brushless electric machine.
In the present embodiment, fan 9 is arranged at the side of rotor core 3 near electric saw cutting blade 6; Or fan 9 is arranged at the side of rotor core 3 away from electric saw cutting blade 6; Or the quantity of fan 9 is two, one is positioned at the side of rotor core 3 near electric saw cutting blade 6, and another is positioned at the side of rotor core 3 away from electric saw cutting blade 6.In this no longer detailed introduction and all within protection domain.
For the ease of Air Flow, air inlet and air outlet can be set on casing 7, so that outside air enters casing 7 by air inlet and discharged by the air outlet of casing 7 under the effect of fan after too high power density brushless electric machine.
Further, in order to ensure the heat radiation of controller 5, can regulate the position of air inlet and air outlet, make outside air process controller 5 and high power density brushless electric machine under the effect of fan 9, so that controller 5 is dispelled the heat in to the heat radiation of high power density brushless electric machine.
The inwall of motor casing 1 is provided with the wind loop between fan 9 and high power density brushless electric machine, by wind loop is set, controls the flow direction of cooling air.In an embodiment, the air inlet of casing 7 is arranged at the side (left side in Fig. 2) away from electric saw cutting blade 6, and the air inlet of casing 7 is arranged at the side (right side in Fig. 2) near electric saw cutting blade 6.Under the effect of fan 9, make extraneous cooling air enter from the air inlet of casing 7, and pass through successively controller and high power density brushless electric machine, by wind loop endoporus by discharging from the air outlet of casing 7 right-hand members again.By wind loop is set, guarantee the flow direction of cooling air.
As shown in Figure 2, because the axis of armature spindle 2 is perpendicular to the operating surface of electric saw cutting blade 6, preferably armature spindle 2 and the driving shaft of electric saw cutting blade 6 are coaxially arranged.In order to improve armature spindle 2 with the connective stability of the driving shaft of electric saw cutting blade 6 and conveniently to install, armature spindle 2 is integral type structure with the driving shaft of electric saw cutting blade 6.Also armature spindle 2 can be connected by jockeys such as shaft couplings with the driving shaft of electric saw cutting blade 6, introduce no longer in detail at this.
In the present embodiment, high power density brushless electric machine is without Hall internal rotor high power density brushless electric machine; High power density brushless electric machine also comprises: be sheathed on the rotor core 3 in armature spindle 2 outsides, be arranged at the stator 4 in rotor core 3 outsides, be arranged at the permanent magnet 8 between stator 4 and rotor core 3.Also can be applied to outer rotor brushless DC motor as high power density brushless electric machine in the annular saw that the utility model embodiment provides.
Wherein, the permanent magnet material of preferred high magnetic is as permanent magnet 8, to improve the power of high power density brushless electric machine.
Because temperature and current density are inversely proportional to, the efficiently radiates heat of stator 4 is determining the power density of motor.As shown in Figure 3, stator 4 comprises stator core 41, is multiplely wound in the stator enamelled wire group 42 in stator core 41 and is arranged at the cold air duct 43 in stator core 41.By cold air duct 43 is set, so that Air Flow, effectively reduce the temperature of stator enamelled wire group 42.Due to, and then improve current density, and guarantee the high power density of the high power density brushless electric machine in the present embodiment, that is, the power that the motor of unit volume produces is higher.
Cold air duct 43 is made up of the gap between gap and stator core 41 and rotor core 3 between adjacent two stator enamelled wire groups 42.Stator enamelled wire is wound around on stator core 41, forms stator enamelled wire group 42.In winding process, between adjacent two stator enamelled wire groups 42, there is gap, for Air Flow, and, gap between adjacent two stator enamelled wire groups 42 is communicated with the gap between stator core 41 and rotor core 3, has further strengthened Air Flow, has improved cooling effect.
As tables of data below shows, taking the diameter of stator 4 as 55mm-65mm, the high power density brushless electric machine that stator height is 50mm is example:
In table 2 prior art with comparing data of the present utility model
Hence one can see that, the power output of the unit volume of the high power density brushless electric machine that the utility model embodiment provides is greater than the power output of the brushless unit volume of high power density of the prior art, but, power is greater than the power of high power density brushless electric machine of the prior art, therefore, the power that the motor of its unit volume produces is higher, to ensure the high power density of the high power density brushless electric machine that the utility model embodiment provides.
The annular saw that the utility model embodiment provides can be by DC low voltage power supply or industrial frequency AC electric drive.By being set, power line is connected with extraneous power frequency AC, to drive the operation of high power density brushless electric machine.
What be that direct current generator and extraneous power frequency AC supply with due to high power density brushless electric machine is industrial-frequency alternating current.In the time that annular saw is connected with extraneous power supply by power line, need increase and decrease that alternating current is converted into galvanic rectification and filter.That is, in the present embodiment, annular saw also comprises the power line for being connected with extraneous power supply and is arranged at rectification and the filter in casing 7, and wherein, rectification and filter can directly be integrated on controller 5, also can arrange separately.The industrial-frequency alternating current that extraneous power supply is supplied with is introduced annular saw by power line, becomes direct current to the supply of high power density brushless electric machine after over commutation and filter.Wherein, rectification and filter are containing a large electric capacity.Current conventional power frequency AC is 220-240V or 110-127V, by regulating rectification and filter to adapt to different power frequency ACs, and then expands the territory of use of the annular saw that the utility model embodiment provides.
Because the current strength of extraneous power frequency AC is larger, preferably, between rotor core 3 and armature spindle 2, be provided with insulating sleeve 10.
Preferably, the motor casing 1 that the utility model embodiment provides is plastic motor shell, with the double insulated requirement of implementation tool, has further improved safety in utilization.
But, because needs arrange power line, hinder the operation of annular saw, therefore, in the present embodiment, preferably, driving the power supplier of high power density brushless electric machine operation is power brick.Due to power brick supply be direct current, directly power to high power density brushless electric machine to realize power brick.Battery pack after charging is in powering to high power density brushless electric machine, and the operation of effectively having avoided annular saw to be connected by power line with extraneous electric supply installation, has also avoided in operating process because power line hinders the situation that annular saw operates.
Further, power brick is arranged in casing 7.Effectively avoid power brick external and affect the normal situation about using of annular saw.
Also power brick can be arranged at outside casing 7, on casing 7, be provided with the interface being connected with power brick.Power brick is connected with casing 7 by interface, and it is connected with high power density brushless electric machine conduction.
For the ease of dismounting and the maintenance of high power density brushless electric machine, casing 7 removably connects with motor casing 1.; in the time of casing 7 and motor casing 1 relative separation, high power density brushless electric machine is installed in motor casing 1, then controller 5 is installed in casing 7; after completing line between controller 5 and high power density brushless electric machine and being connected, by relative with motor casing 1 casing 7 installation.And in the time that needs are changed or keep in repair high power density brushless electric machine, only need casing 7 and motor casing 1 relative separation can keep in repair its inner high power density brushless electric machine or controller 5.
As shown in Figure 2, casing 7 and motor casing 1 is connected for bonding, welding, clamping or screw.Only need to reach the bonding strength of casing 7 and motor casing 1.
In the present embodiment, electric saw cutting blade 6 is high-speed steel woodworking saw blade, carbide alloy woodworking saw blade or hard alloy metal saw blade.Also can be set to other types, introduce no longer one by one at this.
In this description, each embodiment adopts the mode of going forward one by one to describe, and what each embodiment stressed is and the difference of other embodiment, between each embodiment identical similar part mutually referring to.
To the above-mentioned explanation of the disclosed embodiments, make professional and technical personnel in the field can realize or use the utility model.To be apparent for those skilled in the art to the multiple amendment of these embodiment, General Principle as defined herein can, in the situation that not departing from spirit or scope of the present utility model, realize in other embodiments.Therefore, the utility model will can not be restricted to these embodiment shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.

Claims (10)

1. an annular saw, comprise casing (7), it is characterized in that, also comprise and be arranged in described casing (7) and the motor casing (1) being fixedly connected with the sidewall of described casing (7), described motor casing is provided with high power density brushless electric machine in (1), and the controller (5) of described high power density brushless electric machine is arranged in described casing (7);
Described high power density brushless electric machine comprises rotating and is arranged at the armature spindle (2) of described motor casing (1), and the driving shaft of described armature spindle (2) and the electric saw cutting blade (6) of described annular saw is coaxial arranges and be integral type structure;
The axis of described armature spindle (2) is perpendicular to the center of circle of described electric saw cutting blade (6) place plane and the described electric saw cutting blade of process (6).
2. annular saw as claimed in claim 1, is characterized in that, also comprises the fan (9) being arranged on described armature spindle (2).
3. annular saw as claimed in claim 2, is characterized in that, described fan (9) is arranged at the side of described rotor core (3) near described electric saw cutting blade (6); Or described fan (9) is arranged at the side of described rotor core (3) away from described electric saw cutting blade (6); Or, the quantity of described fan (9) is two, one is positioned at the side of described rotor core (3) near described electric saw cutting blade (6), and another is positioned at the side of described rotor core (3) away from described electric saw cutting blade (6).
4. annular saw as claimed in claim 1, is characterized in that, described high power density brushless electric machine is without Hall internal rotor high power density brushless electric machine;
Described high power density brushless electric machine also comprises: the rotor core (3) that is sheathed on described armature spindle (2) outside, the stator (4) that is arranged at described rotor core (3) outside, is arranged at the permanent magnet (8) between described stator (4) and described rotor core (3).
5. annular saw as claimed in claim 4, it is characterized in that, described stator (4) comprises stator core (41), is multiplely wound in the stator enamelled wire group (42) in described stator core (41) and is arranged at the cold air duct (43) in described stator core (41).
6. annular saw as claimed in claim 5, it is characterized in that, described cold air duct (43) is made up of the gap between the gap between adjacent two described stator enamelled wire groups (42) and described stator core (41) and described rotor core (3).
7. annular saw as claimed in claim 1, is characterized in that, also comprises the power line for being connected with extraneous power frequency AC and is arranged at rectification and the filter in described casing (7);
Between described rotor core (3) and described armature spindle (2), be provided with insulating sleeve (10).
8. annular saw as claimed in claim 7, is characterized in that, described motor casing (1) is plastic motor shell.
9. annular saw as claimed in claim 1, is characterized in that, driving the power supplier of described high power density brushless electric machine operation is power brick.
10. annular saw as claimed in claim 9, it is characterized in that, described power brick is arranged in described casing (7), or, described power brick is arranged at outside described casing (7), and described casing is provided with the interface being connected with described power brick on (7).
CN201420288509.6U 2014-05-30 2014-05-30 Circular saw Expired - Fee Related CN203863137U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201420288509.6U CN203863137U (en) 2014-05-30 2014-05-30 Circular saw

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201420288509.6U CN203863137U (en) 2014-05-30 2014-05-30 Circular saw

Publications (1)

Publication Number Publication Date
CN203863137U true CN203863137U (en) 2014-10-08

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN201420288509.6U Expired - Fee Related CN203863137U (en) 2014-05-30 2014-05-30 Circular saw

Country Status (1)

Country Link
CN (1) CN203863137U (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105014152A (en) * 2015-08-05 2015-11-04 鄢文琼 Numerical control metal circular sawing machine driven by arc-shaped and disk-shaped permanent magnet synchronous servo linear motors
CN105328263A (en) * 2014-05-30 2016-02-17 浙江绿动电机科技有限公司 Round saw
CN105538104A (en) * 2016-02-01 2016-05-04 浙江绿动电机科技有限公司 Straight grinding tool

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105328263A (en) * 2014-05-30 2016-02-17 浙江绿动电机科技有限公司 Round saw
CN105014152A (en) * 2015-08-05 2015-11-04 鄢文琼 Numerical control metal circular sawing machine driven by arc-shaped and disk-shaped permanent magnet synchronous servo linear motors
CN105014152B (en) * 2015-08-05 2017-06-23 湖北富升智能装备股份有限公司 The numerical control metal annular sawing machine that arc and dish type permanent magnet synchronous servo linear electric motors drive
CN105538104A (en) * 2016-02-01 2016-05-04 浙江绿动电机科技有限公司 Straight grinding tool

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CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20141008