CN2815620Y - Electric screw driver structure for contactless electromagnetic induction start - Google Patents
Electric screw driver structure for contactless electromagnetic induction start Download PDFInfo
- Publication number
- CN2815620Y CN2815620Y CN 200520074521 CN200520074521U CN2815620Y CN 2815620 Y CN2815620 Y CN 2815620Y CN 200520074521 CN200520074521 CN 200520074521 CN 200520074521 U CN200520074521 U CN 200520074521U CN 2815620 Y CN2815620 Y CN 2815620Y
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- electromagnetic induction
- starts
- motor
- screwdriver
- sensor
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Abstract
The utility model discloses an electric screwdriver structure for contactless electromagnetic induction start, which comprises an outer shell, a screwdriver starting device, a motor, an output shaft driven by the motor and a screwdriver head arranged on the output shaft. The utility model is characterized in that an electromagnetic induction driving mechanism composed of an electromagnetic sensor, a signal amplification driving circuit and a magnetic component is arranged in the screwdriver starting device and the signal output end of the electromagnetic induction driving mechanism is connected with the input end of a motor driving circuit. The electric screwdriver uses a magnetic position sensor to detect and collect magnetic signals generated by the magnetic component. The utility model has the advantages of high precision, reliable work and action accuracy. Because a mechanical type contact switch is cancelled, the working life of the electric screw driver can be enhanced.
Description
Technical field the utility model relates to the improvement that a kind of electric screw driver starts structure, and this kind screwdriver utilizes the sensor displacement detecting mechanism to realize that the contactless electromagnetic induction of electric screw driver starts.
The Starting mode of the known electric screw driver of background technology has lever-type and push-press type two kinds, at present, what realize that the structure of these two kinds of Starting mode all adopts is the mechanical contact microswitch, starting or stoping of electric screw driver controlled in closed or disconnection with the mechanical switch contact, this kind screwdriver structure complexity, part processing requires high, and service life and reliability all be subjected to the influence in switch contact life-span, is difficult to satisfy the frequent requirement of using of electric screw driver.
Summary of the invention is in order to overcome the deficiency of above-mentioned known electric screwdriver structure complexity, life-span weak point, poor reliability, the electric screw driver that the utility model provides adopts the sensor displacement detecting mechanism, realized that contactless electromagnetic induction starts, make that no matter to be lever or push-press type start structure and all become simply, reliably, and the service life of greatly having improved electric screw driver.
The technical scheme that realizes the utility model purpose is such:
The electric screwdriver structure that a kind of contactless electromagnetic induction starts, it comprises the output shaft of shell, screwdriver starting drive, motor, driven by motor and is installed in driver bit on this output shaft, it is characterized in that: be provided with the electromagnetic induction driving mechanism in described screwdriver starting drive, the signal output part of this electromagnetic induction driving mechanism is connected with the input of motor-drive circuit.
Above-mentioned electromagnetic induction driving mechanism is made up of electromagnetic sensor, signal amplification driving circuit and magnetic part, the input of this signal amplification driving circuit is connected to the output of electromagnetic sensor, the output of signal amplification circuit then is connected with the input of aforesaid motor-drive circuit, the rotation of control motor.
Electromagnetic induction driving mechanism of the present utility model also can be made up of the IC-components and the magnetic part that comprise electromagnetic sensor, signal amplification driving circuit, in this case, the output of this IC-components also is connected with the input of aforesaid motor-drive circuit.
The electromagnetic sensor that is used for induced field and makes corresponding actions thereupon is a Hall element.
When aforesaid screwdriver starting drive is lever startup structure, electromagnetic sensor in the electromagnetic induction driving mechanism (magnetic position sensor) is placed in the interior cavity of electric screw driver shell, this cavity is positioned at the below that starts lever, and magnetic part then is placed on and starts in the lever.When pressing the startup lever of the moving screwdriver of piezoelectricity, this startup lever promptly drives the magnetic part that is installed in the lever and moves radially to internal diameter direction, when magnetic part moves in the detection stroke range of magnetic position sensor, its magnetic triggers the magnetic sensor action, produce pulse signal, this signal amplifies the rotation of rear drive motor, electric screw driver startup work through amplification driving circuit; Otherwise, when loosening electric screw driver startup lever, start the detection stroke range that the lever drives magnetic part leaves magnetic sensor, the sensor states upset, electric screw driver quits work.
When aforesaid screwdriver starting drive is a push-press type when starting structure, then magnetic part is to be fixed together with output shaft by driven by motor.When pushing the cutter head of electric screw driver, this cutter head drives the output shaft that is fixed together with cutter head and moves axially, the magnetic part that is installed on this output shaft is done axially-movable simultaneously, when magnetic part moves in the detection stroke range of the magnetic position sensor that is installed in the screwdriver metallic sheath, the action of triggering sensor, sensor sends enabling signal, and this signal starts electric screw driver work after amplification driving circuit amplifies; Otherwise when loosening the electric screw jet blade, magnetic part leaves the detection stroke range of sensor, the sensor states upset, and electric screw driver quits work.
Electric screw driver of the present utility model adopts magnetic position sensor to detect, gather the magnetic signal that magnetic part sends, the accuracy of detection height, and reliable operation does not have misoperation, owing to cancelled mechanical contact switch, has greatly improved the working life of electric screw driver.
Description of drawings Fig. 1 is the combination stereogram of the utility model electric screw driver;
Fig. 2 is that the utility model electric screw driver starts theory diagram;
Fig. 3 is the partial enlarged drawing of the utility model electric screw driver lever starting drive part;
Fig. 4 is the partial enlarged drawing of the utility model electric screw driver push-press type starting drive part.
Each label declaration among the figure:
(1) push-press type starting drive
(2) lever starting drive
(3) start lever
(4), (10) Hall integrated circuit device
(5), (11) sensor holder
(6), (15) magnetic part
(7) bearing pin
(8) spring
(12) driver bit
(13) locking mechanism
(14) output shaft
(16) metallic sheath
(17) motor-drive circuit
(18) motor
The specific embodiment can further be understood architectural feature of the present utility model and beneficial effect thereof for making your auditor and the public, and the spy reaches embodiment in conjunction with the accompanying drawings the specific embodiment of the present utility model is described in detail as follows:
See also Fig. 1, shown in be electric screw driver combination stereogram of the present utility model, cutter head is installed on the output shaft by driven by motor, among Fig. 1, the 1st, the push-press type starting drive, the 2nd, the lever starting drive, the 3rd, start lever.These two kinds of starting drives can be configured on the electric screw driver simultaneously, also can be configured on the electric screw driver alternatively.Be provided with the electromagnetic induction driving mechanism in the screwdriver starting drive, this electromagnetic induction driving mechanism is made up of the IC-components and the magnetic part that comprise Hall element, signal amplification driving circuit.
Fig. 2 is that the utility model electric screw driver starts theory diagram, among Fig. 2, the arrow of magnet 6,15 tops is the direction of motion of magnet, magnetic sensor in the present embodiment is a Hall element, and Hall element and signal amplification driving circuit all are integrated in the IC- components 4,10, and the output of these two IC- components 4,10 is connected with the input of aforesaid motor-drive circuit 17 respectively.When the sensor that adopts other during as magnetic sensor, its circuit theory is the same.1. lever starts under the screwdriver mode, during started by press lever 3, start lever 3 and drive the magnetic part 6 that is installed in the lever, the S that makes magnetic part 6 is extremely near Hall element, after the magnetic field of this magnetic part 6 is detected by Hall element, the counter-rotating of Hall integrated circuit device 4 output levels, this signal is transported to the input of motor-drive circuit 17, is carried out the Starting mode switching and control motor driver motor 18 is rotated by the microprocessor in the drive circuit 17; Otherwise when unclamping startup lever 3, motor 18 stops operating.2. push-press type starts under the screwdriver mode, during the pushing screwdriver, driver bit drives the magnetic part 15 that is installed on the output shaft, the S that makes magnetic part 15 is extremely near Hall element, after the magnetic field of this magnetic part 15 is detected by Hall element, the counter-rotating of Hall integrated circuit device 10 output levels, this signal is transported to microprocessor, by microprocessor control motor driver motor 18 is rotated; Otherwise when removing the pushing screwdriver, motor 18 stops operating.
See also Fig. 3 again, shown in be the partial enlarged drawing of the utility model electric screw driver lever starting drive part.Fig. 3 (a) is the configuration state before starting, the configuration state when Fig. 3 (b) is startup.Hall integrated circuit device 4 is installed in the sensor cavity seat 5 that starts in the lever 3 below screwdriver plastic casings, is placed with magnetic part 6 in the bottom of startup lever 3.When using the activation lever device to start screwdriver, press the bottom of pressing startup lever 3 with finger, making lever 3 is fulcrum with bearing pin 7, overcome the outside reaction force of spring 8, lever 3 bottoms of the built-in parts 6 that are magnetic are radially moved inward, when it moves to location status shown in Fig. 3 (b), be in the detection stroke range of Hall integrated circuit device 4 time, the Hall element action in the Hall integrated circuit device 4 is triggered in the magnetic field of magnetic part 6, produce pulse signal, this signal amplifies the rotation of rear drive motor, electric screw driver startup work through amplification driving circuit; Otherwise, when finger loosens when starting pressing of lever 3 and press, the reaction force of spring 8 makes lever 3 drive magnetic part 6 away from Hall integrated circuit device 4, and the Hall integrated circuit device 4 that loses the magnetic field effect returns to and starts preceding state, and electric screw driver quits work.
Further see also Fig. 4, shown in be the partial enlarged drawing of the utility model electric screw driver push-press type starting drive part.Fig. 4 (a) is the configuration state before starting, the configuration state when Fig. 4 (b) is startup.Be installed in the metallic sheath 16 after Hall integrated circuit device 10 being placed in the sensor holder 11 of insulation, driver bit 12 links together with the output shaft 14 by driven by motor by locking mechanism 13, magnetic part 15 is fixed on the top of output shaft 14, as the detected object of Hall integrated circuit device 10.When pressing pressure driver bit 12 downwards, axially movable driver bit 12 drives the magnetic part 15 that is sleeved on the output shaft 14 and moves axially together, when it moves in the detection range of Hall integrated circuit device 10, when promptly being transformed into the location status of Fig. 4 (b) by Fig. 4 (a) state, the Hall element in the Hall integrated circuit device 10 is triggered in the magnetic field of magnetic part 15, make it to send pulse signal, equally, this pulse signal amplifies the rotation of rear drive motor through amplification driving circuit, and electric screw driver is started working; Otherwise, when loosening when pressing of driver bit 12 pressed, axially movable driver bit 12 drives the magnetic part 15 that is sleeved on the output shaft 14 and moves axially together, in the time of in it moves to away from the detection range of Hall integrated circuit device 10, when promptly turning back to the location status of Fig. 4 (a) by Fig. 4 (b) state, the Hall integrated circuit device 10 that loses the magnetic field effect promptly returns to and starts preceding state, and electric screw driver quits work.
In sum, because what the structural switch element of the utility model used is magnetic sensor, thus the oncontacting of having realized switch reveal, eliminated the influence of switch mechanical action, the startup of electric screw driver is become succinctly, reliable, realized contactless, long-life goal of the invention conscientiously.
Claims (6)
1. electric screwdriver structure that contactless electromagnetic induction starts, it comprises the output shaft of shell, screwdriver starting drive, motor, driven by motor and is installed in driver bit on this output shaft, it is characterized in that: be provided with the electromagnetic induction driving mechanism in described screwdriver starting drive, the signal output part of this electromagnetic induction driving mechanism is connected with the input of motor-drive circuit.
2. the electric screwdriver structure that contactless electromagnetic induction according to claim 1 starts, it is characterized in that: described electromagnetic induction driving mechanism is made up of electromagnetic sensor, signal amplification driving circuit and magnetic part, the input of this signal amplification driving circuit is connected to the output of electromagnetic sensor, and the output of signal amplification circuit then is connected with the input of aforesaid motor-drive circuit.
3. the electric screwdriver structure that contactless electromagnetic induction according to claim 1 starts, it is characterized in that: described electromagnetic induction driving mechanism is made up of the IC-components and the magnetic part that comprise electromagnetic sensor, signal amplification driving circuit, and the output of this IC-components is connected with the input of aforesaid motor-drive circuit.
4. the electric screwdriver structure that contactless electromagnetic induction according to claim 1 starts, it is characterized in that: described screwdriver starting drive is that lever starts structure, electromagnetic sensor in the electromagnetic induction driving mechanism is placed in the interior cavity of electric screw driver shell, this cavity is positioned at the below that starts lever, and magnetic part then is placed on and starts in the lever.
5. the electric screwdriver structure that contactless electromagnetic induction according to claim 1 starts, it is characterized in that: described screwdriver starting drive is that push-press type starts structure, electromagnetic sensor in the electromagnetic induction driving mechanism is placed in after adding insulating boot in the cavity of electric screw driver metallic sheath, this cavity is positioned at the side by the output shaft of driven by motor, and magnetic part is fixed on the top of this output shaft.
6. according to the electric screwdriver structure of claim 2 or 3 described contactless electromagnetic induction startups, it is characterized in that: described electromagnetic sensor is Hall element or huge Magnetic Sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520074521 CN2815620Y (en) | 2005-08-10 | 2005-08-10 | Electric screw driver structure for contactless electromagnetic induction start |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520074521 CN2815620Y (en) | 2005-08-10 | 2005-08-10 | Electric screw driver structure for contactless electromagnetic induction start |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2815620Y true CN2815620Y (en) | 2006-09-13 |
Family
ID=36995421
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520074521 Expired - Fee Related CN2815620Y (en) | 2005-08-10 | 2005-08-10 | Electric screw driver structure for contactless electromagnetic induction start |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2815620Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100446933C (en) * | 2007-05-06 | 2008-12-31 | 常熟市东联电器制造有限责任公司 | Structure of electric screwdriver arrested by non-contact electromagnetic induction |
| EP3663046A1 (en) | 2018-12-07 | 2020-06-10 | SWEDEX GmbH Industrieprodukte | Screw driver assembly and method for operating same |
| CN112959251A (en) * | 2021-01-16 | 2021-06-15 | 宁波佰特工具有限公司 | Electric screwdriver |
-
2005
- 2005-08-10 CN CN 200520074521 patent/CN2815620Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100446933C (en) * | 2007-05-06 | 2008-12-31 | 常熟市东联电器制造有限责任公司 | Structure of electric screwdriver arrested by non-contact electromagnetic induction |
| EP3663046A1 (en) | 2018-12-07 | 2020-06-10 | SWEDEX GmbH Industrieprodukte | Screw driver assembly and method for operating same |
| CN112959251A (en) * | 2021-01-16 | 2021-06-15 | 宁波佰特工具有限公司 | Electric screwdriver |
| CN112959251B (en) * | 2021-01-16 | 2021-12-17 | 宁波佰特工具有限公司 | Electric screwdriver |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20060913 Termination date: 20130810 |