CN102644193A

CN102644193A - Electric cutting knife

Info

Publication number: CN102644193A
Application number: CN2012101469949A
Authority: CN
Inventors: 赵乾麟; 柳文
Original assignee: Zhejiang Cheering Sewing Machine Equipment Co Ltd
Current assignee: Zhejiang Cheering Sewing Machine Equipment Co Ltd
Priority date: 2012-05-14
Filing date: 2012-05-14
Publication date: 2012-08-22
Anticipated expiration: 2032-05-14
Also published as: CN102644193B

Abstract

The invention relates to an electric cutting knife which comprises a rack, a cutting mechanism, a chassis mechanism and a motor control system, wherein the chassis mechanism is arranged at the lower part of the rack, the cutting mechanism comprises a circular knife and a lower knife, the rack is provided with a brushless motor casing, an armature coil winding of a brushless motor is adhered to the inside of the motor casing, one end of a rotor shaft of the brushless motor is arranged in a bearing at the tail end of the motor casing, the other end of the rotor shaft is arranged in a bearing on a motor cap, the rotor shaft extends out of a disc of the rack, a hall sensor is arranged at the outer end of the tail end of the motor casing, and the circular knife in the cutting mechanism is directly arranged on the rotor shaft of the brushless motor. According to the invention, through carrying out electromechanical-integration technical transformation on the electric cutting knife, the mechanism structure of the electric cutting knife is greatly simplified, and the application of the electric cutting knife is extremely convenient, so that compared with the existing electric cutting knife, according to the design above, the volume and mass of the electric cutting knife are greatly reduced, and the appearance of the electric cutting knife is extremely beautiful.

Description

Electronic shearing knife

Technical field

The present invention relates to a kind of electronic shearing knife, refer more particularly to a kind of portable miniature electric shearing knife.

Background technology

Electronic shearing knife is the fabric dividing instrument that a kind of apparel industry is used to use always.The electronic shearing knife of using in the market; Normally constitute by motor and knife rest; In order to realize the structural compactness of electronic shearing knife, motor becomes vertical stratification with knife bar usually, and motor steering comes the cutting cloth through worm and gear switching-over back driven rotary cutterhead.This electronic shearing knife has following defective: motor speed is high, and noise is big, and vibration is big, easy abrasion, and often apply oil, and worm and gear is a core part, assembly technology is complicated, and is pretty troublesome during replacing.In order to solve the technological deficiency of existing electronic shearing knife; Chinese invention patent 200910095605.2 discloses a kind of improved technical scheme of electronic shearing knife; Its content is: " a kind of electronic shearing knife, it comprises motor frame, body chassis, frame, electronic shearing knife structure, and brushless electric machine and drive pulley gear are housed on the said motor frame; said drive pulley gear comprises one group of drive and driving belt at least, driving belt transmission drive drives the blade rotation.Said drive is synchronizing wheel or belt pulley or articulated gear.Said driving belt is to be with synchronously or belt or chain.Said drive pulley gear is through drive number of teeth speed change or through diameter pulley size speed change.Said motor frame and the space that the cutting fabric thickness is arranged after the height that the blade rotation is arranged after frame is connected and the blade shaft other end are installed drive.Yet ", obviously also there is following defective in the enforcement of this technical scheme: one of which, motor are installed on the frame, through the belt pulley transferring power.Owing to cut out in the cutter whole, the weight of motor is the major part of equipment, so this design causes this cutter of cutting out to seem top-heavy, makes whole mechanical structure seem very heavy, causes the operator to use inconvenience; Its two, when the rotating speed of blade need be adjusted, need the adjustment drive number of teeth or, make its very inconvenience in the use through the diameter pulley size.

Summary of the invention

The purpose of this invention is to provide and a kind of cutting disc directly is installed on the motor, and utilize electromechanical integration technology, realize the cutting machine of brushless electric machine low speed, the output of high torque power, be able to solve the defective of existing electric (al) cutter.

The objective of the invention is to realize: a kind of electronic shearing knife through following technical scheme; It comprises frame, cutting mechanism, three parts of body chassis and electric machine control system, the frame lower that described body chassis is installed on, and described cutting mechanism comprises cutting disc and following cutter; Wherein descend cutter to be installed on the body chassis; It is characterized in that: described frame is provided with the brushless electric machine shell, and the armature coil winding of brushless electric machine sticks in the motor housing, and permanent-magnet steel armature spindle one end of brushless electric machine is installed in the bearing of motor housing tail end; The other end be installed in the motor capping on bearing in; The brushless electric motor rotor aixs cylinder is from the frame disc, and Hall element is installed on motor housing tail end outer end, and the cutting disc in the cutting mechanism directly is installed on the brushless electric motor rotor axle.

Described motor housing does not hold tail end to be provided with three width of cloth bar formula bearing supporting frames; Make the not end of motor housing reserve three louvres; Bearing supporting frame is installed Hall element outward, and the magnet ring on the inductive head of Hall element passes louvre and is installed in the brushless electric motor rotor axle is corresponding.

Also be provided with the control panel wire casing on the described frame, circuit control panel is installed in the control panel wire casing on the frame, is connected with gauge tap on being installed in electronic shearing knife handle through lead.

Described electric machine control system is made up of MCU, drive circuit and amplifying circuit, establishes switching signal at the P1.7 of MCU port and detects, and R2 is a current-limiting resistance; When detecting high level, MCU output pulse width modulation signal is through IGBT power tube output pulse width driven motor rotation; When detecting low level, close driving, motor shuts down, and the P1.6 port is that button detects; R1 is a current-limiting resistance, and when K1 touches fashionablely, R1 provides a high level to MCU; Trigger the MCU computing of comparing; According to the computing of comparing of the motor speed signal of hall sensor feedback, the output pulse width modulation signal of adjustment drive circuit, thus make the motor speed adjusting that in restricted portion, circulates.

The invention has the beneficial effects as follows: cutting disc directly is installed on the armature spindle of brushless electric machine, and its rotating speed can be through the electronics adjustment, and the Electric Machine Control plate is installed on frame plate inside very compactly; Like this, not only simplified the mechanism structure of electronic shearing knife greatly, through electronic shearing knife is carried out the electromechanical integration technology transformation; Use and also become very convenient; Compare with the prior electric shearing knife, the design makes that the volume of electronic shearing knife is big also to be reduced with quality significantly, the outward appearance very grace that also seems.

Description of drawings

Fig. 1 is the structural representation of electronic shearing knife;

Fig. 2 is the backsight structural representation of electronic shearing knife;

Fig. 3 is the side schematic appearance of electronic shearing knife;

Fig. 4 is the B-B place cross-sectional view of electronic shearing knife;

Fig. 5 is the rack construction sketch map of electronic shearing knife;

Fig. 6 is the speed control system structural representation of electronic shearing knife.

The specific embodiment

Below in conjunction with embodiment and accompanying drawing thereof the present invention is remake description.

Referring to Fig. 1; At first obtain the frame 2 of electronic shearing knife as shown in Figure 5 with the smart casting mode of aluminum; Frame 2 is provided with the shell 22 of brushless electric machine, and the tail end of motor housing 22 is established three width of cloth formula bearing supporting frames 20, makes the tail end of motor housing form three louvres 23.

The armature coil winding 10 of brushless electric machine sticks in the motor housing 22; The permanent-magnet steel armature spindle 5 of brushless electric machine is assigned in the middle of armature coil winding 9; The one of which end is installed in the bearing 41 of motor housing 22 tail ends; The other end be installed in motor capping 6 on bearing 42 in, brushless electric motor rotor axle 5 protrudes in frame 2 discs, Hall element 8 is installed on motor housing 22 tail end outer ends; It is corresponding with the magnetic field on the brushless electric motor rotor axle 5 that the inductive head of Hall element 8 passes louvre 23, so just on frame, directly has been assembled into brushless electric machine.

Also be provided with control panel wire casing 21 on the frame 2, control panel wire casing 21 is positioned at the base portion of brushless electric machine.The control circuit of brushless electric machine is integrated on the circuit control panel 10, and the output of this control circuit is connected with stator coil 9, and the induction of signal circuit is connected with Hall element 8, and input is connected with power supply.Circuit control panel 10 is installed in the control panel wire casing 21 on the frame 2, is connected with gauge tap on being installed in electronic shearing knife handle 1 through lead.

After brushless electric machine and control circuit install, use its sealing of outer cover again.

Brushless electric motor rotor axle 5 protrudes in motor capping 6, and the cutting disc 71 in the cutting mechanism directly is installed on the brushless electric motor rotor axle 5.

Body chassis 3 is installed on the lower end of frame, and following cutter 72 is installed on the body chassis 3, and following cutter 72 faces protrude in the chassis, is close to cutting disc 71 sides of rotor, forms shearing relation.

Electronic shearing knife handle is fixed on the frame with screw, is provided with through hole in frame and handle junction, and the switch on pilot passes through hole and is installed in handle is connected.

The control system of dc brushless motor is made up of MCU, drive circuit and amplifying circuit, and wherein MCU selects for use XC866 as processor, adopts the trapezoidal wave type of drive, and XC866 is according to three Hall element signal CCPOS0; The output of CCPOS1 and CCPOS2 modulation (PWM), PWM is respectively by CC60, COUT60; CC61, COUT61, CC62; COUT62 output as drive circuit, is controlled conducting and the shutoff of IGBT with the FAN7388 chip.There are 6 kinds of states in PWM output, for every kind of state, in 6 power tubes of inverter bridge 2 work is only arranged, and the winding of brushless electric machine produces exciting current through these two power tubes.For reduce the loss that freewheel current produces on parasitic diode, in application, use IGBT as the inversion element.

Overcurrent protection detects from the input of AN7 mouth, and the analog-to-digital conversion cycle is 1ms, and XC866 judges whether overcurrent of circuit.

U1TX and U1RX are the communication interface of MCU, are responsible for and extraneous communication.

The P1.7 port is that switching signal detects, and R2 is a current-limiting resistance, and when detecting high level, XC866 single-chip microcomputer output pulse width modulation signal through IGBT power tube output pulse width driven motor rotation, is closed driving when detecting low level, and motor shuts down.

The P1.6 port is that button detects, and R1 is a current-limiting resistance, when K1 touch fashionable; R1 provides a high level to XC866; Trigger the XC866 computing of comparing, compare the output pulse width modulation signal of adjustment drive circuit according to the motor speed signal of hall sensor feedback; Thereby motor speed is regulated by 800 to 1200 circulations, whenever detected and once add 200 and change.

Claims

1. electronic shearing knife; It comprises frame (2), cutting mechanism, (3) three parts of body chassis and electric machine control system (10); Frame (2) bottom that described body chassis (3) is installed on; Described cutting mechanism comprises cutting disc (71) and following cutter (72), wherein descends cutter (72) to be installed on the body chassis (3), and it is characterized in that: described frame (2) is provided with brushless electric machine shell (22); The armature coil winding (10) of brushless electric machine sticks in the motor housing (22); Permanent-magnet steel armature spindle (5) one ends of brushless electric machine are installed in the bearing (41) of motor housing (22) tail end, the other end be installed in motor capping (6) on bearing (42) in, brushless electric motor rotor axle (5) protrudes in frame (2) disc; Hall element (8) is installed on motor housing (22) tail end outer end, and the cutting disc in the cutting mechanism (71) directly is installed on the brushless electric motor rotor axle (5).

2. electronic according to claim 1 shearing knife; Its characteristic is that also the not end tail end of the motor housing (22) on frame (2) is provided with three width of cloth bar formula bearing supporting frames (20); Make the not end of motor housing (22) reserve three louvres (23); Bearing supporting frame is installed Hall element (8) outward, and the magnetic field on the inductive head of Hall element (8) passes louvre (23) and is installed in the brushless electric motor rotor axle on (5) is corresponding.

3. electronic according to claim 1 shearing knife; Its characteristic is that also motor housing (22) outer end on frame (2) also is provided with control panel wire casing (21); Electric machine control system (10) is installed in the control panel wire casing (21) on the frame (2), is connected with gauge tap on being installed in electronic shearing knife handle (1) through lead.

4. electronic according to claim 1 shearing knife, its characteristic are that also described electric machine control system (10) is made up of MCU, drive circuit and amplifying circuit, establish switching signal at the P1.7 of MCU port and detect; R2 is a current-limiting resistance, when detecting high level, and MCU output pulse width modulation signal; Through drive circuit output pulse width driven motor rotation, when detecting low level, close driving, motor shuts down; The P1.6 port is that button detects, and R1 is a current-limiting resistance, when K1 touch fashionable; R1 provides a high level to MCU, triggers the MCU computing of comparing, according to the computing of comparing of the motor speed signal of hall sensor feedback; The output pulse width modulation signal of adjustment drive circuit, thus make the motor speed adjusting that in restricted portion, circulates.