CN100341663C - Digital display for the tension force of carpentry panel saw blade - Google Patents
Digital display for the tension force of carpentry panel saw blade Download PDFInfo
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- CN100341663C CN100341663C CNB2005100435574A CN200510043557A CN100341663C CN 100341663 C CN100341663 C CN 100341663C CN B2005100435574 A CNB2005100435574 A CN B2005100435574A CN 200510043557 A CN200510043557 A CN 200510043557A CN 100341663 C CN100341663 C CN 100341663C
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- tensile force
- saw blade
- digital display
- force sensing
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Abstract
The present invention relates to a digital display for the tension force of a saw blade of a woodworking band saw, which comprises a tension force sensing component, a circuit connected with a sensor in the tension force sensing component, and a digital display installed at the facade of an upper box body, wherein the tension force sensing component is divided into three types, the first type tension force sensing component comprises a square washer and a capacitive grating or optical grating digital caliper length displaying sensor fixed at the inside of the left side of the square washer and an upper axle seat, the second type tension force sensing component comprises a spring piece box positioned on a square frame and sheathed on a screw rod of a tensioning mechanism, a transverse U-shaped spring piece installed in the spring piece box, a strain sensor fixed on the spring piece, and a sleeve pipe arranged at the lower end of a hand wheel and pressed on the spring piece, and the third type tension force sensing component comprises an upper square washer and a lower square washer installed between a square nut and a compression spring, and two pressure sensors installed between the two square washers. The size of the tensioning force of the saw blade is displayed by numbers through the present invention, the present invention is installed on the facade, and thus, observation and reading numbers are convenient and clear. The present invention can be widely applied to various woodworking band saws.
Description
Technical field
The invention belongs to the woodworking machinery technical field, more particularly relate to the design of the numeric display unit of band saw saw blade tensile force.
Background technology
Traditional band saw bands for band strainer comprises handwheel, be fixed on screw rod on the handwheel, be fixed on the parts such as nut on the axle.Screw rod is installed in the nut with its external screw thread.During rotation hand wheel, screw rod just can drive nut together with last axle and driven big belt wheel is last or following moving, thereby strengthen or reduce driven big belt wheel and the spacing between the belt wheel greatly initiatively, so just with the bands for band tensioning or relax.But above-mentioned strainer all can not indicate the tensioning degree of bands for band.
China's application formerly such as the applicant's No. 200520080413.1 grades has proposed several new bands for band strainers.It is the tension band saw blade fast, and can indicate the tensioning degree of bands for band with pointer.But above-mentioned indication device is installed in the back side of band saw, can not show with numeral, and observation and reading are convenient, both unclear, also not directly perceived inadequately.
Summary of the invention
Purpose of the present invention just is to overcome above-mentioned shortcoming and defect, and a kind of numeric display unit of band saw saw blade tensile force is provided.It not only can indicate the size of the tensile force of bands for band, and is installed in the front of band saw, and shows observation and convenient reading, clear, directly perceived with numeral.
Band saw is made up of base, the frame that has upper box and lower box, last axle and lower shaft, driven big belt wheel and institutes such as initiatively big belt wheel, bands for band, workbench, motor, transmission mechanism and electric machine controller.The bands for band strainer is installed on its upper box.The bands for band strainer then comprises handwheel, screw rod, last axle bed, sleeve pipe, square box, two locking nuts, another sleeve pipe and square nut, compression spring, is fixed on the bearing pin and the handle thereof of two guide rails on the upper box, the eccentric wheel that is arranged in square box, band plush copper.
The bands for band strainer is work like this: rotate handwheel by hand, just can force the screw rod rotation, will move on the square nut.Square nut will compress the spring compression, the very fast increase of tension force of compression spring.When this tension force greater than last axle bed, go up axle, driven big belt wheel when being sleeved on the pressure of the bands for band on the driven and initiatively big belt wheel, just can make axle bed, go up on axle, the driven big belt wheel and move, also bands for band tensioning soon.Then with the handle rotary pin shaft, force the facet at eccentric maximum eccentric place to be resisted against the top of square box.In this course, sleeve pipe, handwheel, screw rod and the square nut that eccentric wheel drives square box, screw rod top suit successively moves on fast, and will compress the spring compression fast, makes on the axle bed, last, driven big belt wheel to move, with the further tensioning of bands for band.
In order to achieve the above object, the present invention is installed on the upper box and bands for band strainer of band saw.It comprises the tensile force sensing element that is installed on the bands for band strainer, be installed in the upper box with the tensile force sensing element in the circuit that is connected with lead of sensor and the digital display that is installed in the upper box top front face that is connected with lead with circuit.The effect of tensile force sensing element is the numerical value that records non electrical quantity power, and is converted into electric weight, sends circuit then to.The effect of circuit is to send into single-chip microcomputer after this electric weight amplification, the mould/number conversion, again through the processing of single-chip microcomputer, drives digital display and shows.Foregoing circuit can adopt prior art.Digital display is installed in the upper box top front face, is convenient to observe and reading, and is very convenient, clear, directly perceived.
Digital display can be LCD.LCD has the good ratio of performance to price, power saving, and volume is little, easy for installation.
The tensile force sensing element can comprise and is installed in square washer between the spring of square nut and compression, is fixed on capacitance-grid type or raster pattern digital display calliper measuring mechanism between square washer and the inside, last axle bed left side, capacitance-grid type or raster pattern digital display calliper measuring mechanism formation linear transducer.
Capacitive grid type digital display kind of calliper mechanism comprise the moving grid chi that is fixed on left end above the square washer hold concurrently sensor, be fixed on the fixed grid chi that is positioned at its left side the inside on the axle bed, the moving grid chi is held concurrently and remain certain clearance between sensor and the fixed grid chi when relative displacement.
Be positioned on the last axle bed compression spring the left side fixing a holder with screw, the fixed grid chi is fixed on the inside of holder, be positioned on the upper box holder above have the slotted hole of size greater than holder.The slotted hole structure is convenient to maintain at any time.
The basic principle of capacitance-grid type or raster pattern digital display calliper measuring mechanism belongs to prior art.The present invention utilizes this principle, has adopted capacitance-grid type or raster pattern digital display calliper measuring mechanism, ingenious being installed on the band saw.During the tensile force of accommodation zone saw blade, the tension force and the tensioning degree of compression spring change thereupon, square nut and the square washer that is installed on it and moving grid chi hold concurrently sensor with respect to the relative displacement of the fixed grid chi on the last axle bed also with regard to corresponding change.Remain certain clearance between sensor and the fixed grid chi because the moving grid chi is held concurrently when relative displacement, the capacitance signal of responding between the two is directly proportional with their relative displacement.This capacitance signal is received by the moving grid chi sensor of holding concurrently, and is amplified, is sent into single-chip microcomputer after mould/number conversion by circuit, shows through the MCU driving digital display again.In fact also just expressed the relative value of bands for band tensile force.The compression spring base of compression spring and square nut and square washer are installed on the last axle bed are square, can avoid the mutual rotation between them.
The tensile force sensing element can comprise also on the screw rod that is sleeved on the bands for band strainer and be arranged in spring film magazine above the square box, be installed in the spring film magazine and be sleeved on horizontal U font spring leaf on the screw rod, be installed in the strain transducer on the spring leaf that the handwheel lower end of bands for band strainer directly is pressed on the spring leaf by sleeve pipe.
During the tensile force of accommodation zone saw blade, the tension force and the tensioning degree of compression spring change thereupon.The loam cake that the sleeve pipe of the handwheel lower end of bands for band strainer passes the spring film magazine directly is pressed on the spring leaf, and therefore, the pressure that sleeve pipe imposes on horizontal U font spring leaf changes thereupon, and the resistance value that is installed in the strain transducer on the spring leaf also changes thereupon.This resistance value drives digital display at last and shows through the amplification and the respective handling of circuit.
The tensile force sensing element can also comprise that being installed in square nut and compression two square washers, the symmetries up and down between the spring is installed in up and down two pressure sensors between two square washers.
The left side that is positioned at the compression spring on the last axle bed has window and is fixing a window board with screw, and the top that is positioned at window board on the upper box has the slotted hole of size greater than window board.This structure is convenient to maintain at any time equally.
Install on the last axle bed compression spring base of compression spring and square nut and up and down two square washers be square, can avoid the mutual rotation between them.
During the tensile force of accommodation zone saw blade, the tension force and the tensioning degree of compression spring change thereupon.Being pressed in two pressure on the pressure sensor by top square washer is directly proportional with the tensile force of bands for band.This force value is converted to resistance value by pressure sensor, and is amplified by the circuit on the circuit board, handles through single-chip microcomputer again, drives digital display at last and shows.After axle bed, last axle, the weight of driven big belt wheel together with parts such as compression springs, in fact what digital display showed is exactly the actual value of bands for band tensile force in the subduction.
Task of the present invention comes to this and finishes.
The present invention not only can indicate the size of the tensile force of bands for band, and is installed in the front of band saw, and shows observation and convenient reading, clear, directly perceived with numeral.It can also show the actual value of bands for band tensile force.Can be widely used in the various band saws.
Description of drawings
Fig. 1 is a general structure schematic diagram of the present invention.
Fig. 2 is the A-A cutaway view of Fig. 1 of embodiment 1.
Fig. 3 is the A partial enlarged drawing of Fig. 2.
Fig. 4 is the schematic diagram after Fig. 1 of embodiment 2 removes driven big belt wheel.
Fig. 5 is the A-A cutaway view of Fig. 4.
Fig. 6 is the A partial enlarged drawing of Fig. 5.
Fig. 7 is the A-A cutaway view of Fig. 1 of embodiment 3.
Fig. 8 is the A partial enlarged drawing of Fig. 7.
Fig. 9 is the circuit theory diagrams of embodiment 3.
The specific embodiment
Embodiment 1.A kind of numeric display unit of band saw saw blade tensile force is as Fig. 1～shown in Figure 3.Band saw is made up of base 1, the frame 4 that has upper box 2 and lower box 3, last axle 5 and lower shaft, driven big belt wheel 6 and institutes such as initiatively big belt wheel, bands for band 7, workbench 8, motor, transmission mechanism and electric controller 40.On its upper box 2 the bands for band strainer is installed.The bands for band strainer then comprises handwheel 9, screw rod 10, goes up axle bed 11, sleeve pipe 12, square box 13, two locking nuts 14, another sleeve pipe 15 and square nut 16, compression spring 17, be fixed on the eccentric wheel 19 that is installed with in two guide rails 18 on the upper box 2, the square box 13, the bearing pin 21 and the handle 22 thereof of band plush copper 20.
Consult Fig. 2 and Fig. 3, the tensile force sensing element of embodiment 1 comprise be installed in square washer 23 between the spring 17 of square nut 16 and compression, capacitance-grid type or raster pattern digital display calliper measuring mechanism between being fixed on inside square washer 23 and last axle bed 11 left sides.Capacitance-grid type or raster pattern digital display calliper measuring mechanism constitute linear transducer.
Capacitive grid type digital display kind of calliper mechanism comprise the moving grid chi that is fixed on left ends above the square washer 23 hold concurrently sensor 26, be fixed on the fixed grid chi 27 that is positioned on the axle bed 11 inside its left side.The moving grid chi is held concurrently and remain certain clearance between sensor 26 and the fixed grid chi 27 when relative displacement.A holder 29 is being fixed with screw 28 in the left side that is positioned at compression spring 17 on the last axle bed 11, and fixed grid chi 27 is fixed on the inside of holder 29.The top that is positioned at holder 29 on the upper box 2 has the slotted hole 30 of size greater than holder 29.
Embodiment 2.A kind of numeric display unit of band saw saw blade tensile force is as Fig. 4～shown in Figure 6.
Its tensile force sensing element comprises on the screw rod 10 that is sleeved on the bands for band strainer and is arranged in spring film magazine 31 above the square box 13, is installed in spring film magazine 31 and is sleeved on horizontal U font spring leaf 32 on the screw rod 10, is installed in the strain transducer 33 on the spring leaf 32 that handwheel 9 lower ends of bands for band strainer directly are pressed on the spring leaf 32 by sleeve pipe 12.
All the other are with embodiment 1.
Embodiment 3.A kind of numeric display unit of band saw saw blade tensile force is as Fig. 7～shown in Figure 9.
Its tensile force sensing element comprises that being installed in square nut 16 and compression two square washers 34, the symmetries up and down between the spring 17 is installed in up and down two pressure sensors 35 between two square washers 34.
The left side that is positioned at compression spring 17 on the last axle bed 11 has window 36 and is fixing a window board 38 with screw 37.The top that is positioned at window board 38 on the upper box 2 has the slotted hole 39 of size greater than window board 38.This structure is convenient to maintain at any time equally.
Install on the last axle bed 11 the compression spring base of compression spring 17 and square nut 16 and up and down two square washers 34 be square, can avoid the mutual rotation between them.
Fig. 9 is circuit theory diagrams.35 is two pressure sensors among the figure, and 8031 is single-chip microcomputer, and 7650 is amplifier, and 0809 is A/D converter, and digital display 25 is a LCD.This circuit is a circuit common, does not give unnecessary details.
All the other are with embodiment 1.
Embodiment 1～3 not only can indicate the size of the tensile force of bands for band, and is installed in the front of band saw, and shows observation and convenient reading, clear, directly perceived with numeral.It can also show the actual value of bands for band tensile force.Can be widely used in the various band saws.
Claims (8)
1. the numeric display unit of a band saw saw blade tensile force, it is installed on the upper box and bands for band strainer of band saw, it is characterized in that it comprise the tensile force sensing element that is installed on the bands for band strainer, be installed in the upper box with the tensile force sensing element in the circuit that is connected with lead of sensor and the digital display that is installed in the upper box top front face that is connected with lead with circuit.
2. according to the numeric display unit of the described band saw saw blade of claim 1 tensile force, it is characterized in that said digital display is a LCD.
3. according to the numeric display unit of claim 1 or 2 described band saw saw blade tensile forces, it is characterized in that said tensile force sensing element comprises is installed in square washer between the spring of square nut and compression, is fixed on capacitance-grid type or raster pattern digital display calliper measuring mechanism between square washer and the inside, last axle bed left side, capacitance-grid type or raster pattern digital display calliper measuring mechanism formation linear transducer.
4. according to the numeric display unit of the described band saw saw blade of claim 3 tensile force, it is characterized in that when the digital display calliper measuring mechanism is capacitive grid type digital display kind of calliper mechanism, said capacitive grid type digital display kind of calliper mechanism comprise the moving grid chi that is fixed on left end above the square washer hold concurrently sensor, be fixed on the fixed grid chi that is positioned at its inside, left side on the axle bed, the moving grid chi is held concurrently and remain certain clearance between sensor and the fixed grid chi when relative displacement.
5. according to the numeric display unit of the described band saw saw blade of claim 4 tensile force, it is characterized in that being positioned at the left side of compressing spring on the said upward axle bed is fixing a holder with screw, the fixed grid chi is fixed on the inside of holder, be positioned on the upper box holder above have the slotted hole of size greater than holder.
6. according to the numeric display unit of claim 1 or 2 described band saw saw blade tensile forces, it is characterized in that said tensile force sensing element comprises on the screw rod that is sleeved on the bands for band strainer and is arranged in spring film magazine above the square box, is installed in the spring film magazine and is sleeved on horizontal U font spring leaf on the screw rod, is installed in the strain transducer on the spring leaf, the handwheel lower end of bands for band strainer directly is pressed on the spring leaf by sleeve pipe.
7. according to the numeric display unit of claim 1 or 2 described band saw saw blade tensile forces, it is characterized in that said tensile force sensing element comprises that two square washers, the symmetries up and down that are installed between square nut and the compression spring are installed in up and down two pressure sensors between two square washers.
8. according to the numeric display unit of the described band saw saw blade of claim 4 tensile force, it is characterized in that the said left side that is positioned at the compression spring on the axle bed of going up has window and fixing a window board with screw, the top that is positioned at window board on the upper box has the slotted hole of size greater than window board.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100435574A CN100341663C (en) | 2005-05-16 | 2005-05-16 | Digital display for the tension force of carpentry panel saw blade |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100435574A CN100341663C (en) | 2005-05-16 | 2005-05-16 | Digital display for the tension force of carpentry panel saw blade |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1706589A CN1706589A (en) | 2005-12-14 |
| CN100341663C true CN100341663C (en) | 2007-10-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005100435574A Expired - Fee Related CN100341663C (en) | 2005-05-16 | 2005-05-16 | Digital display for the tension force of carpentry panel saw blade |
Country Status (1)
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| CN (1) | CN100341663C (en) |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4660481A (en) * | 1985-05-07 | 1987-04-28 | Pfaff Industriemaschinen Gmbh | Sewing machine having presser foot pressure force measuring device |
| DE3701552A1 (en) * | 1987-01-21 | 1988-08-04 | Scheppach Maschf J | Bandsaw |
| JPH071291A (en) * | 1993-04-20 | 1995-01-06 | Howa Mach Ltd | Tool holder |
| JPH07148646A (en) * | 1993-11-25 | 1995-06-13 | Nagase Integrex:Kk | Cutting machining device |
| JP2000141167A (en) * | 1998-11-12 | 2000-05-23 | Toshiba Mach Co Ltd | Numeric value control device for machine tool |
| CN2399177Y (en) * | 1999-09-09 | 2000-10-04 | 彭建强 | Tension display for bands for band |
| CN2468683Y (en) * | 2001-03-09 | 2002-01-02 | 青岛迪玛特五金工具有限公司 | Carpenter's band saw |
| CN1116595C (en) * | 1997-01-30 | 2003-07-30 | 三星电子株式会社 | Apparatus and method for testing belt tension of belt drive |
| US20030196535A1 (en) * | 2002-04-22 | 2003-10-23 | Pei-Lieh Chiang | Belt saw machine with a belt cutter that is easy to replace |
| TW566253U (en) * | 2003-04-11 | 2003-12-11 | Ming Sin Machines Ind Co Ltd | Device for indicating tension of saw band on a cutting machine |
-
2005
- 2005-05-16 CN CNB2005100435574A patent/CN100341663C/en not_active Expired - Fee Related
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4660481A (en) * | 1985-05-07 | 1987-04-28 | Pfaff Industriemaschinen Gmbh | Sewing machine having presser foot pressure force measuring device |
| DE3701552A1 (en) * | 1987-01-21 | 1988-08-04 | Scheppach Maschf J | Bandsaw |
| JPH071291A (en) * | 1993-04-20 | 1995-01-06 | Howa Mach Ltd | Tool holder |
| JPH07148646A (en) * | 1993-11-25 | 1995-06-13 | Nagase Integrex:Kk | Cutting machining device |
| CN1116595C (en) * | 1997-01-30 | 2003-07-30 | 三星电子株式会社 | Apparatus and method for testing belt tension of belt drive |
| JP2000141167A (en) * | 1998-11-12 | 2000-05-23 | Toshiba Mach Co Ltd | Numeric value control device for machine tool |
| CN2399177Y (en) * | 1999-09-09 | 2000-10-04 | 彭建强 | Tension display for bands for band |
| CN2468683Y (en) * | 2001-03-09 | 2002-01-02 | 青岛迪玛特五金工具有限公司 | Carpenter's band saw |
| US20030196535A1 (en) * | 2002-04-22 | 2003-10-23 | Pei-Lieh Chiang | Belt saw machine with a belt cutter that is easy to replace |
| TW566253U (en) * | 2003-04-11 | 2003-12-11 | Ming Sin Machines Ind Co Ltd | Device for indicating tension of saw band on a cutting machine |
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| Publication number | Publication date |
|---|---|
| CN1706589A (en) | 2005-12-14 |
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