CN204262397U - A kind of drilling machine - Google Patents
A kind of drilling machine Download PDFInfo
- Publication number
- CN204262397U CN204262397U CN201420618844.8U CN201420618844U CN204262397U CN 204262397 U CN204262397 U CN 204262397U CN 201420618844 U CN201420618844 U CN 201420618844U CN 204262397 U CN204262397 U CN 204262397U
- Authority
- CN
- China
- Prior art keywords
- circuit
- drilling machine
- electrically connected
- microprocessor
- control circuit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Drilling And Boring (AREA)
- Processing Of Stones Or Stones Resemblance Materials (AREA)
- Control Of Electric Motors In General (AREA)
Abstract
A kind of drilling machine, comprises base and is arranged on the support on base, described support is provided with motor; Described motor drives drill bit; The power supply of described drilling machine is single phase alternating current power supply, and described motor is three phase electric machine, is connected with between the output of described single phase alternating current power supply and the input of described three phase electric machine: AC-DC change-over circuit, three-phase inversion circuit and control circuit; Described control circuit and described three-phase inversion circuit.The utility model have employed three phase electric machine, thus reaches the function such as rotating, electrodeless variable-speed.The utility model also comprises a braking circuit, and when emergency shutdown, braking circuit can produce counter electromotive force in motor, thus allows motor stalls more rapidly.
Description
Technical field
The utility model relates to a kind of electric tool, especially a kind of drilling machine.
Background technology
Existing electronic drilling machine is owing to being subject to the restriction that power supply input is single-phase electricity, and what it all adopted is that single-phase electricity input and monophase machine output drive bit.But the moment of monophase machine is little, efficiency is lower and can not realize the functions such as rotating, directly speed governing.For this reason, the electronic drilling machine that existing monophase machine drives is all utilize the mechanical means such as gear or belt in transmission process, lean on different speed ratios to reach the function of speed governing.But be no matter all with certain delayed with gear or the speed governing realized with belt.And gear-box or belt box too increase the volume of drilling machine itself, weight and cost.And mechanical speed governors all can relate to lubrication between all parts and the time permanent after wear problem.
In addition, when using drilling machine, because of negligence, situation that is injured, that even end is of common occurrence.For this reason, also it is also proposed higher requirement to the security protection of drilling machine in industry, with regard to relatively safe drilling machine, after user presses emergency switch, drilling machine can reach static in 10 seconds.For existing drilling machine, unique safety measure is exactly power-off at once after user presses emergency switch, but drill bit still can rotate because of the inertia of rotor and speed-regulating part.So most of existing monophase machine drilling machine all can not reach the safety requirements of European Union.Can reach in the drilling machine of this requirement, its motor is then very accurate, expensive.
Utility model content
Technical problem to be solved in the utility model is the deficiency overcoming above-mentioned prior art, provides one to have higher safety prevention measure, and the electronic drilling machine that volume is little, durable, cost is low.
According to a kind of drilling machine that the utility model proposes, comprise base and be arranged on the support on base, described support is provided with motor; Described motor drives drill bit; It is characterized in that, the power supply of described drilling machine is single phase alternating current power supply, described motor is three phase electric machine, is connected with between the output of described single phase alternating current power supply and the input of described three phase electric machine: AC-DC change-over circuit, three-phase inversion circuit and control circuit; Described control circuit controls described three-phase inversion circuit.
Drilling machine in the utility model also comprises following subsidiary characteristic:
Described drilling machine also comprises a braking circuit, and input and the described AC-DC change-over circuit of described braking circuit are electrically connected, and output and the described motor of described braking circuit are electrically connected; The control end of described control circuit and described braking circuit is electrically connected.
Described AC-DC change-over circuit comprises diode rectifier and at least one filter capacitor in parallel with described diode rectifier.
Described diode rectifier is half-bridge diode rectifier.
Described three-phase inversion circuit comprises multiple IGBT module, and output and the described three phase electric machine of described IGBT module are electrically connected; Control end and the described control circuit of described IGBT module are electrically connected.
The quantity of described IGBT module is parallel with one another three groups, and often group comprises the described IGBT module of two series connection.
The drive circuit that described control circuit comprises microprocessor and is electrically connected with described microprocessor; Drive circuit described in described Microprocessor S3C44B0X, described drive circuit drives described braking circuit brake and/or drive described three-phase inversion circuit to change according to described microprocessor-based control signal.
A protection circuit is also connected with between described microprocessor and described drive circuit.
A sample circuit is also provided with between the output and described three phase electric machine of described three-phase inversion circuit; Described sample circuit and described control circuit are electrically connected; Described sample circuit obtains the sample circuit of the output of described IGBT inverter circuit and sends to described control circuit.
The drive circuit that described control circuit comprises microprocessor and is electrically connected with described microprocessor; Described sample circuit and described microprocessor are electrically connected, and sampled signal is issued described microprocessor.
Described drilling machine also comprises a guidance panel, and described guidance panel comprises display device and input equipment, and described guidance panel and described processor are electrically connected.
Described drilling machine also comprises a brake hard module, and described brake hard module comprises the input module be electrically connected with described control circuit and the brake module be connected with described drill bit; When carrying out brake hard, described control circuit is braked described motor by described braking circuit; Described brake module brakes to described drill bit.
The utility model and existing drilling machine something in common are: what all adopt is single-phase electricity input.And most of household user electricity input be all single-phase electricity input, so the utility model at input without the need to any special setting, achieve rig floor plug and play.Secondly, the utility model make use of three phase electric machine can the advantage of direct speed governing, with electronic circuit, single-phase electricity input is converted to three-phase electricity output, and is directly controlled rotating and the speed governing of motor by control circuit.Without the need to arranging belt or gear to reach mechanical speed governors.Therefore, the design is more reliable than existing mechanical speed governors, durable.Also because reduce volume and the weight of drilling machine without the need to mechanical speed governors parts.The power factor of three phase electric machine self and efficiency ratios will be higher than monophase machine, and wherein, the power factor of three phase electric machine and efficiency ratios are all about 0.9, and the power factor of monophase machine and efficiency ratios can only to about 0.75.So with regard to motor itself, the efficiency just height more confidential than single-phase electricity of three phase electric machine.Add and use the drilling machine of monophase machine to need to arrange mechanical part to reach the object of speed governing, its whole efficiency can be lower.For this reason, the efficiency of this drilling machine is much higher than drilling machine existing, on the market.In addition, the electric current in the starting current of three phase electric machine and running is also all little than monophase machine, also makes this drilling machine power saving more, energy-conservation.Circuit in this drilling machine according to the rotating speed of drill bit, especially can also carry out torque compensation when the slow-speed of revolution.And after producing electronic circuit in enormous quantities, its manufacturing cost can decline rapidly.For this reason, cost of the present utility model is also low than the cost of the drilling machine of mechanical speed governors.
In addition, braking circuit and emergency stop button is provided with in the utility model.When operator presses emergency stop button, rig floor entirety is not only carried out power-off by control circuit, also can send signal to braking circuit, braking circuit can utilize rotor produce counter electromotive force to weaken the inertia of rotor, thus make drill bit stop operating more quickly.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
Fig. 2 is the stereogram of schematic block circuit diagram of the present utility model.
Detailed description of the invention
With reference to Fig. 1, according to a kind of drilling machine provided by the utility model, also referred to as rig floor.Comprising: base 1, is arranged on the support 2 on base, is arranged on the motor on support 2 and circuit, and described motor is three phase electric machine 6, and motor drives drill bit 3 to rotate.Support 2 is also provided with pull bar 4, and operator allows drill bit 3 be elevated in vertical direction by pulling pull bar 4.
With reference to Fig. 2, the circuit in this drilling machine comprises the AC-DC change-over circuit 51, braking circuit 52, three-phase inversion circuit 53 and the control circuit that connect successively; Described control circuit also comprises microprocessor 54, drive circuit 55, protection circuit.Described AC-DC change-over circuit 51 is connected with single phase alternating current power supply.And the single-phase alternating current of input is converted to direct current.At least one filter capacitor 512 comprising multiple diode rectifier 511 in described AC-DC change-over circuit 51 and be in parallel with described diode rectifier 511.Filter capacitor 512 makes the direct current waveform after rectification more smooth.Described diode reorganizer 511 can be half bridge rectifier, also can make full-bridge rectifier.Direct current after rectification is as the power supply of other circuit.
With reference to Fig. 2, described three-phase inversion circuit 53 comprises three groups of IGBT module 531 parallel with one another, often includes in group between two mutual IGBT module 531 of connecting of the IGBT module 531, two of mutually connecting and is connected with three phase electric machine 6.Wherein, microprocessor 54 passes through drive circuit 55 to the control end input electrical signal of each IGBT module 531, thus controls the opening and closing of each IGBT module 531.When stopped status, each IGBT module 531 is all in off-state.Operationally, microprocessor 54 can, according to algorithm, make one group in three groups of IGBT module 531 to close to drilling machine in special time, and form the electric pathway with motor, direct current can be transferred in three phase electric machine 6 by closed IGBT module 531.After certain hour, other one group of IGBT module 531 can be communicated with by microprocessor.For this reason, in some cycles, three groups of IGBT module 531 can be communicated with by microprocessor successively respectively, and the time difference often organized between IGBT module 531 is 120 degree.Thus make three groups of IGBT module, 531 outputs be three-phase electricity, to such an extent as to three phase electric machine 6 is able to work.
With reference to Fig. 2, also comprise a sample circuit 56 in described circuit, one end of described sample circuit 56 is arranged on the input of three phase electric machine 6, and the other end and microprocessor 54 are electrically connected.Described sample circuit 56 is sampled to the electric current being input to three phase electric machine 6.And the result of sampling is transferred to microprocessor 54.When sample circuit 56 occurs abnormal, microprocessor 54 can control three-phase conversion circuit 53, thus protection motor 6 does not receive damage.Such as, when motor 6 or drill bit 3 stuck time, sample rate current can raise suddenly, and microprocessor 54 can, by three-phase conversion circuit 53 power-off, prevent motor 6 from burning because electric current is excessive.
In addition, with reference to Fig. 2, described rig floor also comprises the control panel 7 be electrically connected with microprocessor 54, and described control panel 7 comprises display module 71 and instruction input module 72.Staff by instruction input module 72 by specifically requiring, parameter and instruction send to microprocessor 54, microprocessor 54 controls each circuit according to inputted information.Described sample circuit 57 also comprises the hall sensor be arranged on drill bit 3 output shaft.The rotating speed of described hall sensor to drill bit 3 is sampled, and shows on display module 71.
With reference to Fig. 1 and Fig. 2, described rig floor is also provided with an emergency stop button 8, described brake hard module comprises the brake module be connected with drill bit 3, and the input module be electrically connected with described microprocessor 54.Under normal circumstances, brake hard module 8 also comprises the eye-catching emergency stop button of the redness be arranged on rig floor 8.When being in an emergency, such as, when having people injured, operator presses emergency stop button 8, and microprocessor 54 can three phase electric machine 6 power-off.Meanwhile, braking circuit 52 can input a DC current to motor 6.After have input direct current, the stator winding of motor 6 can produce a constant magnetic field.And the rotor of motor 6 because of inertia continue rotate time, can stationary magnetic field be cut and produce corresponding electromotive force and induced-current.Judge according to right-hand law, the active force that this induced-current and magnetic field produce is with to act on epitrochanterian inertia direction contrary.Thus allow the rotor of motor stop operating more quickly.Meanwhile, the brake module be connected with drill bit 3 also can carry out mechanical brake to drill bit 3.Time required for further minimizing emergency brake.Experimentally show, this drilling machine can realize rotating to motor within 1 second, braked rapidly to drill bit 3.
In sum, the utility model, by the mode of circuit, first converts single-phase alternating current general inside family to direct current, then reaches the output of three-phase electricity by the folding time difference controlling multiple IGBT module.And utilize three phase electric machine 6 to reach the function such as rotating, stepless time adjustment to drive drill bit 3.Compared with the drilling machine of existing use monophase machine, the technical program not only can reach stepless time adjustment, and eliminates the mechanical adjustable speed drive such as gear, belt, makes the overall volume of drilling machine and weight more little and light.Durability and precision are also increased.And three phase electric machine 6 inherently has the advantages such as high power, high efficiency, energy saving.And the non-constant width of stepless time adjustment scope of this drilling machine, scope is 300-3000rpm.
In addition, multiple emergency braking apparatus is provided with in this drilling machine.When there are special circumstances, motor not only can disconnect by control circuit, also can input a direct current by the stator of braking circuit 52 pairs of motors, thus makes rotor produce counter electromotive force, is stopped by rotor faster.And the brake gear be arranged on drill bit also can implement mechanical brake to drill bit.By these three kinds brake schemes, this drilling machine is from duty to stopping only needing 3-6 second completely.Meet the safety standard both at home and abroad to the drilling machine brake hard time completely.
Above-described embodiment is the utility model preferably embodiment; but detailed description of the invention of the present utility model is not limited to above-described embodiment, other are any do not deviate from essence of the present utility model and principle under done change, modification, substitute, combination, simplify and be all included in protection scope of the present invention.
Claims (12)
1. a drilling machine, comprises base and is arranged on the support on base, described support is provided with motor; Described motor drives drill bit; It is characterized in that, the power supply of described drilling machine is single phase alternating current power supply, described motor is three phase electric machine, is connected with between the output of described single phase alternating current power supply and the input of described three phase electric machine: AC-DC change-over circuit, three-phase inversion circuit and control circuit; Described control circuit controls described three-phase inversion circuit.
2. drilling machine according to claim 1, is characterized in that, described drilling machine also comprises a braking circuit, and input and the described AC-DC change-over circuit of described braking circuit are electrically connected, and output and the described motor of described braking circuit are electrically connected; The control end of described control circuit and described braking circuit is electrically connected.
3. drilling machine according to claim 1, is characterized in that, described AC-DC change-over circuit comprises diode rectifier and at least one filter capacitor in parallel with described diode rectifier.
4. drilling machine according to claim 3, is characterized in that, described diode rectifier is half-bridge diode rectifier.
5. drilling machine according to claim 1, it is characterized in that, described three-phase inversion circuit comprises multiple IGBT module, and input and the AC-DC change-over circuit of described IGBT module are electrically connected, and output and the described three phase electric machine of described IGBT module are electrically connected; Control end and the described control circuit of described IGBT module are electrically connected.
6. drilling machine according to claim 5, is characterized in that, the quantity of described IGBT module is parallel with one another three groups, and often group comprises the described IGBT module of two series connection.
7. drilling machine according to claim 2, is characterized in that, the drive circuit that described control circuit comprises microprocessor and is electrically connected with described microprocessor; Drive circuit described in described Microprocessor S3C44B0X, described drive circuit drives described braking circuit brake and/or drive described three-phase inversion circuit to change according to described microprocessor-based control signal.
8. drilling machine according to claim 7, is characterized in that, is also connected with a protection circuit between described microprocessor and described drive circuit.
9. drilling machine according to claim 5, is characterized in that, between the output and described three phase electric machine of described three-phase inversion circuit, be also provided with a sample circuit; Described sample circuit and described control circuit are electrically connected; Described sample circuit obtains the sample circuit of the output of described IGBT inverter circuit and sends to described control circuit.
10. drilling machine according to claim 9, is characterized in that, the drive circuit that described control circuit comprises microprocessor and is electrically connected with described microprocessor; Described sample circuit and described microprocessor are electrically connected, and sampled signal is issued described microprocessor.
11. drilling machines according to claim 7, it is characterized in that, described drilling machine also comprises a guidance panel, described guidance panel comprises display device and input equipment, and described guidance panel and described processor are electrically connected.
12. drilling machines according to claim 2, is characterized in that, described drilling machine also comprises a brake hard module, and described brake hard module comprises the input module be electrically connected with described control circuit and the brake module be connected with described drill bit; When carrying out brake hard, described control circuit is braked described motor by described braking circuit; Described brake module brakes to described drill bit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420618844.8U CN204262397U (en) | 2014-10-23 | 2014-10-23 | A kind of drilling machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420618844.8U CN204262397U (en) | 2014-10-23 | 2014-10-23 | A kind of drilling machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204262397U true CN204262397U (en) | 2015-04-15 |
Family
ID=52797295
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420618844.8U Active CN204262397U (en) | 2014-10-23 | 2014-10-23 | A kind of drilling machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204262397U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109925021A (en) * | 2017-12-19 | 2019-06-25 | 西南医科大学附属中医医院 | A kind of protectiveness orthopaedic drill |
-
2014
- 2014-10-23 CN CN201420618844.8U patent/CN204262397U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109925021A (en) * | 2017-12-19 | 2019-06-25 | 西南医科大学附属中医医院 | A kind of protectiveness orthopaedic drill |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104993580B (en) | Oil electricity mixed DC electric supply installation | |
| WO2013163863A1 (en) | An ecm motor controller adapting for various frequencies and power supply voltages | |
| CN102882441B (en) | A kind of threephase asynchronous electric brake arrangement and control method thereof | |
| CN104578702A (en) | Circulation power generation system | |
| CN220393033U (en) | Low-frequency emergency dragging device of permanent magnet gear motor direct-drive elevator | |
| CN204262397U (en) | A kind of drilling machine | |
| CN204832458U (en) | Energy repayment type asynchronous machine test platform | |
| CN201263116Y (en) | High-efficiency energy-saving rare-earth permanent magnet direct drive device | |
| CN203536956U (en) | Three-phase alternating current phase sequence error correction device | |
| CN102798525A (en) | Parallel-in transferring test platform of generator | |
| CN205674334U (en) | A kind of servo-control system of ceramic throwing machine | |
| CN204237450U (en) | Hoisting crane translation driving device | |
| CN201130918Y (en) | Controller for switching bidirectional power supply of AC motor | |
| CN201063584Y (en) | Variable-frequency driven rotary drill gyration and boost traveling system | |
| CN203788093U (en) | Trietex with electromagnet clutch | |
| CN202710309U (en) | Generator grid-connection transferring test bed | |
| CN102493944A (en) | Ground direct-driving screw pump oil extraction device for switched reluctance motor | |
| CN201358762Y (en) | Improved oil extractor with energy-saving realization capability | |
| CN203166798U (en) | Speed regulation frequency converter special for trolley locomotive | |
| CN204947947U (en) | BLDCM Drive System, drive circuit | |
| CN214310800U (en) | Permanent magnet synchronous motor load test tool | |
| CN104104201A (en) | Three-phase brushless direct-current fan motor | |
| CN104033369A (en) | Stepless speed regulation control system of electric high-pressure water pump | |
| CN203166827U (en) | Special frequency converter for adjusting speed of battery electrical locomotive | |
| CN204633527U (en) | A kind of stepless speed-regulating motor technology is boring the utilization device of milling equipment |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP02 | Change in the address of a patent holder |
Address after: 212003 8th floor, No. 116, dingmaoqiao Road, Zhenjiang City, Jiangsu Province Patentee after: Yan Wei Address before: 212003 8th floor, No. 116, dingmaoqiao Road, Zhenjiang City, Wuxi City, Jiangsu Province Patentee before: Yan Wei |
|
| CP02 | Change in the address of a patent holder |