CN105397152A - Drilling tool with slow starting circuit - Google Patents

Drilling tool with slow starting circuit Download PDF

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Publication number
CN105397152A
CN105397152A CN201510934555.8A CN201510934555A CN105397152A CN 105397152 A CN105397152 A CN 105397152A CN 201510934555 A CN201510934555 A CN 201510934555A CN 105397152 A CN105397152 A CN 105397152A
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CN
China
Prior art keywords
fet
electrically connected
contact
drain electrode
diode
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CN201510934555.8A
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Chinese (zh)
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CN105397152B (en
Inventor
徐冬为
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
CHONGQING WEIGEN WHEEL GEAR MANUFACTURING Co Ltd
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CHONGQING WEIGEN WHEEL GEAR MANUFACTURING Co Ltd
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Priority to CN201510934555.8A priority Critical patent/CN105397152B/en
Publication of CN105397152A publication Critical patent/CN105397152A/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B47/00—Constructional features of components specially designed for boring or drilling machines; Accessories therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q5/00—Driving or feeding mechanisms; Control arrangements therefor
    • B23Q5/02—Driving main working members
    • B23Q5/04—Driving main working members rotary shafts, e.g. working-spindles
    • B23Q5/10—Driving main working members rotary shafts, e.g. working-spindles driven essentially by electrical means

Abstract

A drilling tool with a slow starting circuit comprises a rectifying circuit, a positive voltage input end, a negative voltage input end, a single-pole double-throw switch, a selection unit, a motor, a drill bit and a control unit. The first end of the single-pole double-throw switch is connected with the positive voltage input end, the second end of the single-pole double-throw switch is connected with the negative voltage input end, and a common end of the single-pole double-throw switch is connected with the selection unit. The control unit is further connected with the positive voltage input end and used for detecting the polarity of the voltage output from the single-pole double-throw switch and sending out a delay control signal to the selection unit. The selection unit is connected with the motor, and the motor is connected with the drill bit. The selection unit is used for controlling the motor to rotate forwards and reversely according to the delay control signal so as to drive the drill bit to be lifted up or pressed down. The drilling tool with the slow starting circuit has the beneficial effects that the drill bit will make a response after a period of delay after the switch is pressed down, a worker then makes a response, the condition that the worker is hurt by a machine is avoided, and the safety of the worker is guaranteed.

Description

A kind of drilling tool with soft-start circuit
Technical field
The present invention relates to drilling tool field, be specifically related to a kind of drilling tool with soft-start circuit.
Background technology
The mode of operation of existing drilling tool is: 1. product hole to be drilled is put in cell body by workman; 2. press switch, drill bit moves downward to hole to product immediately; 3. press switch again, drill bit lifts immediately.There is drill bit immediate response after pressing switch with upper type, easily make workman react not anxious, cause the problem that machine is hurted sb.'s feelings.
Summary of the invention
There is drill bit immediate response after pressing switch for solving existing drilling tool, easily make workman react not anxious, cause the problem that machine is hurted sb.'s feelings, the present invention proposes a kind of drilling tool with soft-start circuit.
A kind of drilling tool with soft-start circuit provided by the invention, is characterized in that, comprises rectification circuit, positive voltage input, negative voltage input, single-pole double-throw switch (SPDT), selection unit, motor, drill bit and control unit; Described rectification circuit is connected with described positive voltage input and described negative voltage input respectively;
The first end of described single-pole double-throw switch (SPDT) is connected with positive voltage input, and the second end is connected with negative voltage input, and common port is connected with described selection unit;
Described control unit is connected between the common port of described single-pole double-throw switch (SPDT) and described selection unit on connected node, and described control unit is also connected with described positive voltage input, and the feedback end of described control unit is connected with described selection unit; Described control unit, for detecting the polarity of voltage exported from described single-pole double-throw switch (SPDT), sends delayed control signal to described selection unit;
Described selection unit is connected with described motor, and described motor is connected with described drill bit; Described selection unit is used for according to the described motor positive and inverse of the control that delayed control signal is corresponding, drives and described drill bit lifts or presses down.
Further, described control unit comprises first control circuit, second control circuit, the 3rd control circuit and the 4th control circuit.
Further, described first control circuit comprises the first FET, the first phase inverter and the first diode; The grid of described first FET is electrically connected with one end of described first phase inverter, and source electrode to be electrically connected between the common port of described single-pole double-throw switch (SPDT) and described selection unit on connected node; Described first diode electrically is connected between the source electrode of described first FET and drain electrode, and the positive pole of described first diode is electrically connected with the drain electrode of described first FET, and negative pole is electrically connected with the source electrode of described first FET.
Further, described second control circuit comprises the second FET and the second diode; The grid of described second FET is electrically connected with the other end of described first phase inverter, and source electrode is electrically connected on the connected node between the source electrode of described first FET and described single-pole double-throw switch (SPDT); Described second diode electrically is connected between the source electrode of described second FET and drain electrode, and the positive pole of described second diode is electrically connected with the drain electrode of described second FET, and negative pole is electrically connected with the source electrode of described second FET.
Further, described 3rd control circuit comprises the 3rd FET, the second phase inverter and the 3rd diode; The grid of described 3rd FET is electrically connected with one end of described second phase inverter, source ground, drain electrode is electrically connected with the drain electrode of described first FET, on the connected node between the grid that the other end of described second phase inverter is electrically connected on described first phase inverter and described second FET; Described 3rd diode electrically is connected between the source electrode of described 3rd FET and drain electrode, and the positive pole of described 3rd diode is electrically connected with the source electrode of described 3rd FET, and negative pole is electrically connected with the source electrode of described 3rd FET.
Further, described 4th control circuit comprises the 4th FET and the 4th diode; On connected node between the grid that the grid of described 4th FET is electrically connected on described first phase inverter and described second FET, source ground, drain electrode is electrically connected with the drain electrode of described second FET; Described 4th diode electrically is connected between the source electrode of described 4th FET and drain electrode, and the positive pole of described 8th diode is electrically connected with the source electrode of described 4th FET, negative pole is electrically connected with the source electrode of described 4th FET, on the connected node between the grid that described positive voltage input is electrically connected on described first phase inverter and described second FET.
Further, described selection unit comprises contact sets type switch and coil; Described contact sets type switch comprises the first contact, the second contact and the 3rd contact, and wherein, described first, the 3rd contact is stationary contact, and described second contact is movable contact.
Further, described second contact is electrically connected with the common port of described single-pole double-throw switch (SPDT), and described first contact is electrically connected with described motor, and described 3rd contact is electrically connected with described motor; Described coil comprises the first link and the second link, first link of described coil is electrically connected on the connected node between the drain electrode of described first FET and the drain electrode of described 3rd FET, and the second link of described coil is electrically connected on the node of the drain electrode of described second FET and the drain electrode of described 4th FET.
Further, when the voltage source of described coil is to for time clockwise, described second contact is connected with described first contact.
Further, described first FET and described second FET are P-channel field-effect transistor (PEFT) pipe, and described 3rd FET and described 4th FET are N channel field-effect pipe.
Beneficial effect of the present invention for described in there is soft-start circuit drilling tool can realize drill bit after pressing switch and can postpone certain hour and just can react, make workman have certain reaction, there will not be the situation that machine is hurted sb.'s feelings, ensure the safety of workman.
Accompanying drawing explanation
Fig. 1 is the structural representation of drilling tool one embodiment of the present invention.
Detailed description of the invention
Fig. 1 is the structural representation of drilling tool 1 one embodiment of the present invention.In figure, 1 is drilling tool, and 2 is rectification circuit, and 10 is positive voltage input, 12 is negative voltage input, and 14 is single-pole double-throw switch (SPDT), and 16 is selection unit, 18 is motor, and 22 is drill bit, and 206 is control unit, 212 is first control circuit, and 214 is second control circuit, and 216 is the 3rd control circuit, 218 is the 4th control circuit, and D1-D4 is first to fourth diode, and M1-M4 is first to fourth FET, N1-N2 is the first to the second phase inverter, and L1 is coil, and S1 is contact sets type switch.
Referring to Fig. 1, is the structural representation of drilling tool 1 one embodiment of the present invention.In the present embodiment, drilling tool 1 comprises positive voltage input 10, negative voltage input 12, single-pole double-throw switch (SPDT) 14, selection unit 16, motor 18, drill bit 22 and control unit 206.Rectification circuit 2 external power supply is after over commutation, and rectification circuit 2 is connected with positive voltage input 10 and negative voltage input 12 respectively, and the positive voltage that positive voltage input 10 and negative voltage input 12 are connected rectification circuit 2 respectively exports and negative voltage output.
The first end of single-pole double-throw switch (SPDT) 14 is connected with positive voltage input 10, and the second end is connected with negative voltage input 12, and common port is connected with selection unit 16.Control unit 206 is connected between the common port of single-pole double-throw switch (SPDT) 14 and selection unit 16 on connected node, and control unit 206 is also connected with positive voltage input 10, and the feedback end of control unit 206 is connected with selection unit 16.Control unit 206, for detecting the polarity of voltage exported from single-pole double-throw switch (SPDT) 14, sends delayed control signal to selection unit 16.Selection unit 16 is connected with motor 18, and motor 18 is connected with drill bit 22, selection unit 16, for control motor 18 rotating corresponding according to delayed control signal, drives and drill bit 22 lifts or presses down.In the present embodiment, the time delay of delayed control signal is between 1s-3s, and the reaction time of workman is generally about 0.3s.Selection unit 16, for the control motor 18 corresponding according to delayed control signal, drives and drill bit 22 lifts or presses down.
In the present embodiment, control unit 206 comprises first control circuit 212, second control circuit 214, the 3rd control circuit 216 and the 4th control circuit 218.Wherein, first control circuit 212 comprises the first FET M1, the first phase inverter N1 and the first diode D1.First FET M1 can be P-channel field-effect transistor (PEFT) pipe, and the grid of the first FET M1 is electrically connected with one end of the first phase inverter N1, and source electrode to be electrically connected between the common port of single-pole double-throw switch (SPDT) 14 and selection unit 16 on connected node.First diode D1 is electrically connected between the source electrode of the first FET M1 and drain electrode, and the positive pole of the first diode D1 is electrically connected with the drain electrode of the first FET M1, and negative pole is electrically connected with the source electrode of the first FET M1.
Second control circuit 214 comprises the second FET M2 and the second diode D2.Wherein, the second FET M2 can be P-channel field-effect transistor (PEFT) pipe, and the grid of the second FET M2 is electrically connected with the other end of the first phase inverter N1, and source electrode is electrically connected on the connected node between the source electrode of the first FET M1 and single-pole double-throw switch (SPDT) 14.Second diode D2 is electrically connected between the source electrode of the second FET M2 and drain electrode, and the positive pole of the second diode D2 is electrically connected with the drain electrode of the second FET M2, and negative pole is electrically connected with the source electrode of the second FET M2.
3rd control circuit 216 comprises the 3rd FET M3, the second phase inverter N2 and the 3rd diode D3.Wherein, 3rd FET M3 can be N channel field-effect pipe, the grid of the 3rd FET M3 is electrically connected with one end of the second phase inverter N2, source ground, drain electrode is electrically connected with the drain electrode of the first FET M1, on the connected node between the grid that the other end of the second phase inverter N2 is electrically connected on the first phase inverter N1 and the second FET M2.3rd diode D7 is electrically connected between the source electrode of the 3rd FET M3 and drain electrode, and the positive pole of the 3rd diode D3 is electrically connected with the source electrode of the 3rd FET M3, and negative pole is electrically connected with the source electrode of the 3rd FET M3.
4th control circuit 218 comprises the 4th FET M4 and the 4th diode D4, wherein, 4th FET M4 can be N channel field-effect pipe, on connected node between the grid that the grid of the 4th FET M4 is electrically connected on the first phase inverter N1 and the second FET M2, source ground, drain electrode is electrically connected with the drain electrode of the second FET M2,4th diode D4 is electrically connected between the source electrode of the 4th FET M4 and drain electrode, and the positive pole of the 8th diode D8 is electrically connected with the source electrode of the 4th FET M4, negative pole is electrically connected with the source electrode of the 4th FET M4.On connected node between the grid that positive voltage input 10 is electrically connected on the first phase inverter N1 and the second FET M2.
It should be noted that FET M1-M4 also can be transistor, and FET M1-M4 is not fixed as P raceway groove or N raceway groove, can adjust according to different conducting demands.
In the present embodiment, selection unit 16 comprises contact sets type switch S 1 and coil L1.Contact sets type switch S 1 comprises the first contact S1a, the second contact S1b and the 3rd contact S1c, and wherein, the first, the 3rd contact S1a, S1c is stationary contact, and the second contact S1b is movable contact.In the present embodiment, the second contact S1b is electrically connected with the common port of single-pole double-throw switch (SPDT), and the first contact S1a is electrically connected with motor 18, and the 3rd contact S1c is electrically connected with motor 18.Coil L1 comprises the first link and the second link, first link of coil L1 be electrically connected on the first FET M1 drain and the 3rd FET M3 drain between connected node on, second link of coil L1 is electrically connected on the node that the second FET M2 drains and the 4th FET M4 drains.In the present embodiment, when voltage flows into coil L1 then from the second link outflow from the first link, it is clockwise that definition voltage flows in coil L1, it is counterclockwise for can certainly defining that voltage flows in coil L1, follow-up with voltage from the first link flow into coil L1 then flow out from the second link time, then voltage flows to and is described in detail for example for clockwise in coil L1.In the voltage source of coil L1 to for time clockwise, the second contact S1b is connected with the first contact S1a.
In one embodiment, when user common port is connected with first end connect positive voltage source time, first control circuit 212 receives the voltage of the forward of positive voltage input 10 and single-pole double-throw switch (SPDT) 14, will conducting between the source electrode of the first FET M1 then in first control circuit 212 and drain electrode, the voltage of the forward that single-pole double-throw switch (SPDT) 14 exports will flow into coil L1 from first incoming end of coil L1, then flows out from second incoming end of coil L1.4th control circuit 218 receives the voltage of the voltage of the forward that positive voltage input 10 exports and the forward from the second incoming end outflow of coil L1, then will conducting between the source electrode of the 4th FET M4 of the 4th control circuit 218 and drain electrode, the earth will be flowed into from the voltage of the forward of the second incoming end outflow of coil L1, so coil L1 just forms the voltage of a clockwise flow, second contact S1b and the first contact S1a of contact sets type switch S 1 are electrically connected, between single-pole double-throw switch (SPDT) 14 with motor 18, passage will be communicated with, control drill bit 22 press down start boring.Control single-pole double-throw switch (SPDT) 14 from user, the time delay starting to hole to drill bit 22 is between 1s-3s, and mainly the type of circuit components decides.
Beneficial effect of the present invention is that the drilling tool 1 with soft-start circuit can realize drill bit after pressing switch and can postpone certain hour and just can react, and makes workman have certain reaction, there will not be the situation that machine is hurted sb.'s feelings, ensure the safety of workman.
The foregoing is only the preferred embodiments of the present invention; be not limited to the present invention, for a person skilled in the art, within the spirit and principles in the present invention all; any amendment of doing, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.

Claims (10)

1. there is a drilling tool for soft-start circuit, it is characterized in that, comprise rectification circuit, positive voltage input, negative voltage input, single-pole double-throw switch (SPDT), selection unit, motor, drill bit and control unit; Described rectification circuit is connected with described positive voltage input and described negative voltage input respectively;
The first end of described single-pole double-throw switch (SPDT) is connected with positive voltage input, and the second end is connected with negative voltage input, and common port is connected with described selection unit;
Described control unit is connected between the common port of described single-pole double-throw switch (SPDT) and described selection unit on connected node, and described control unit is also connected with described positive voltage input, and the feedback end of described control unit is connected with described selection unit; Described control unit, for detecting the polarity of voltage exported from described single-pole double-throw switch (SPDT), sends delayed control signal to described selection unit;
Described selection unit is connected with described motor, and described motor is connected with described drill bit; Described selection unit is used for according to the described motor positive and inverse of the control that delayed control signal is corresponding, drives and described drill bit lifts or presses down.
2. have the drilling tool of soft-start circuit as claimed in claim 1, it is characterized in that, described control unit comprises first control circuit, second control circuit, the 3rd control circuit and the 4th control circuit.
3. have the drilling tool of soft-start circuit as claimed in claim 2, it is characterized in that, described first control circuit comprises the first FET, the first phase inverter and the first diode; The grid of described first FET is electrically connected with one end of described first phase inverter, and source electrode to be electrically connected between the common port of described single-pole double-throw switch (SPDT) and described selection unit on connected node; Described first diode electrically is connected between the source electrode of described first FET and drain electrode, and the positive pole of described first diode is electrically connected with the drain electrode of described first FET, and negative pole is electrically connected with the source electrode of described first FET.
4. have the drilling tool of soft-start circuit as claimed in claim 3, it is characterized in that, described second control circuit comprises the second FET and the second diode; The grid of described second FET is electrically connected with the other end of described first phase inverter, and source electrode is electrically connected on the connected node between the source electrode of described first FET and described single-pole double-throw switch (SPDT); Described second diode electrically is connected between the source electrode of described second FET and drain electrode, and the positive pole of described second diode is electrically connected with the drain electrode of described second FET, and negative pole is electrically connected with the source electrode of described second FET.
5. have the drilling tool of soft-start circuit as claimed in claim 4, it is characterized in that, described 3rd control circuit comprises the 3rd FET, the second phase inverter and the 3rd diode; The grid of described 3rd FET is electrically connected with one end of described second phase inverter, source ground, drain electrode is electrically connected with the drain electrode of described first FET, on the connected node between the grid that the other end of described second phase inverter is electrically connected on described first phase inverter and described second FET; Described 3rd diode electrically is connected between the source electrode of described 3rd FET and drain electrode, and the positive pole of described 3rd diode is electrically connected with the source electrode of described 3rd FET, and negative pole is electrically connected with the source electrode of described 3rd FET.
6. have the drilling tool of soft-start circuit as claimed in claim 5, it is characterized in that, described 4th control circuit comprises the 4th FET and the 4th diode; On connected node between the grid that the grid of described 4th FET is electrically connected on described first phase inverter and described second FET, source ground, drain electrode is electrically connected with the drain electrode of described second FET; Described 4th diode electrically is connected between the source electrode of described 4th FET and drain electrode, and the positive pole of described 8th diode is electrically connected with the source electrode of described 4th FET, negative pole is electrically connected with the source electrode of described 4th FET, on the connected node between the grid that described positive voltage input is electrically connected on described first phase inverter and described second FET.
7. have the drilling tool of soft-start circuit as claimed in claim 6, it is characterized in that, described selection unit comprises contact sets type switch and coil; Described contact sets type switch comprises the first contact, the second contact and the 3rd contact, and wherein, described first, the 3rd contact is stationary contact, and described second contact is movable contact.
8. have the drilling tool of soft-start circuit as claimed in claim 7, it is characterized in that, described second contact is electrically connected with the common port of described single-pole double-throw switch (SPDT), and described first contact is electrically connected with described motor, and described 3rd contact is electrically connected with described motor; Described coil comprises the first link and the second link, first link of described coil is electrically connected on the connected node between the drain electrode of described first FET and the drain electrode of described 3rd FET, and the second link of described coil is electrically connected on the node of the drain electrode of described second FET and the drain electrode of described 4th FET.
9. have the drilling tool of soft-start circuit as claimed in claim 8, it is characterized in that, when the voltage source of described coil is to for time clockwise, described second contact is connected with described first contact.
10. have the drilling tool of soft-start circuit as claimed in claim 6, it is characterized in that, described first FET and described second FET are P-channel field-effect transistor (PEFT) pipe, and described 3rd FET and described 4th FET are N channel field-effect pipe.
CN201510934555.8A 2015-12-15 2015-12-15 A kind of drilling tool with soft-start circuit Active CN105397152B (en)

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Application Number Priority Date Filing Date Title
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CN105397152A true CN105397152A (en) 2016-03-16
CN105397152B CN105397152B (en) 2017-11-14

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2295295Y (en) * 1997-04-24 1998-10-21 管康 Soft starting device for electric tool
WO2010074375A1 (en) * 2008-12-24 2010-07-01 Kim In-Seok Forward/reverse rotation control device for drilling machine
CN202824754U (en) * 2012-08-09 2013-03-27 潜江市江汉钻具有限公司 Low-power soft starter
CN103872651A (en) * 2014-03-27 2014-06-18 天佑电器（苏州）有限公司 Power-driven tool control circuit and control method thereof
CN204287817U (en) * 2014-12-26 2015-04-22 江苏中强内燃机配件有限公司 Metal rig Delayed starting control device
CN204398909U (en) * 2014-09-25 2015-06-17 湖北师范学院 The slow starting control circuit of children's electric motor vehicle

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2295295Y (en) * 1997-04-24 1998-10-21 管康 Soft starting device for electric tool
WO2010074375A1 (en) * 2008-12-24 2010-07-01 Kim In-Seok Forward/reverse rotation control device for drilling machine
CN202824754U (en) * 2012-08-09 2013-03-27 潜江市江汉钻具有限公司 Low-power soft starter
CN103872651A (en) * 2014-03-27 2014-06-18 天佑电器（苏州）有限公司 Power-driven tool control circuit and control method thereof
CN204398909U (en) * 2014-09-25 2015-06-17 湖北师范学院 The slow starting control circuit of children's electric motor vehicle
CN204287817U (en) * 2014-12-26 2015-04-22 江苏中强内燃机配件有限公司 Metal rig Delayed starting control device

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