LU102181B1 - Device for monitoring dynamic torque of mechanical power-close air screwdriver and use method thereof - Google Patents
Device for monitoring dynamic torque of mechanical power-close air screwdriver and use method thereof Download PDFInfo
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- LU102181B1 LU102181B1 LU102181A LU102181A LU102181B1 LU 102181 B1 LU102181 B1 LU 102181B1 LU 102181 A LU102181 A LU 102181A LU 102181 A LU102181 A LU 102181A LU 102181 B1 LU102181 B1 LU 102181B1
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- air
- torque
- screwdriver
- gear
- air screwdriver
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L3/00—Measuring torque, work, mechanical power, or mechanical efficiency, in general
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M99/00—Subject matter not provided for in other groups of this subclass
- G01M99/005—Testing of complete machines, e.g. washing-machines or mobile phones
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B23/00—Details of, or accessories for, spanners, wrenches, screwdrivers
- B25B23/14—Arrangement of torque limiters or torque indicators in wrenches or screwdrivers
- B25B23/145—Arrangement of torque limiters or torque indicators in wrenches or screwdrivers specially adapted for fluid operated wrenches or screwdrivers
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Details Of Spanners, Wrenches, And Screw Drivers And Accessories (AREA)
- Force Measurement Appropriate To Specific Purposes (AREA)
- Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
Abstract
The present invention relates to the field of torque monitoring of industrial air screwdrivers, and specifically, to a device for monitoring dynamic torque of a mechanical power-close air screwdriver and a use method thereof. The monitoring device includes a dovetail-groove bottom plate, a to-be-tested air screwdriver fastening unit, a torque transmission unit, a torque measurement unit, and a drive unit. The to-be-tested air screwdriver fastening unit, the torque transmission unit, the torque measurement unit, and the drive unit are sequentially mounted on the dovetail-groove bottom plate from left to right. The to-be-tested air screwdriver fastening unit is connected to the torque transmission unit, and transmits the torque of a to-be-tested air screwdriver to the torque measurement unit through the torque transmission unit, the torque measurement unit monitors the torque of the to-be-tested air screwdriver in real time, and the drive unit adds rotational degrees of freedom of the device. In the present invention, the dynamic torque of upright square-head air screwdrivers of various sizes can be measured, a real-time torque output curve of an air screwdriver can be drawn and printed, quality assessment can be performed on fixed-torque air screwdrivers at delivery, and it is evaluated whether an air source of the air screwdriver provides a stable input.
Description
| | LU102181 P10058SLU00
BACKGROUND Technical Field The present invention relates to the field of torque monitoring of industrial air screwdrivers, and specifically, to a device for monitoring dynamic torque of a mechanical power-close air screwdriver and a use method thereof. Related Art An air screwdriver is also referred to as a pneumatic screwdriver and already becomes an indispensable tool in current integrated and intelligent factory production. For example, in the field of the production of important parts such as aircraft engines, to meet the requirements of modern production technologies, there are increasingly stringent requirements on the fastening of bolts. It is necessary to prevent bolts from being inadequately tightened and also necessary to prevent the bolts from being excessively tightened, to avoid damage or fracture of the bolts. In many fields, fixed-torque air screwdrivers are used increasingly widely, and quality assessment of fixed-torque air screwdrivers at delivery becomes increasingly important.
Currently, existing patents also provide some solutions. For example, Chinese Patent
71.201821603881.6 discloses a torque calibration machine for a tightening gun, including a workbench, a slide bar, a stop lever, a torque sensor, and a tightening gun. The torque sensor and the slide bar are mounted on the workbench. A lower end of the stop lever passes through the slide bar and is movable on the slide bar. The tightening gun is detachably connected to the torque sensor. Chinese Patent Z1.201711263270.1 discloses a pneumatic wrench detection device and a pneumatic wrench detection method. The device includes a frame, a rotational speed detection mechanism, a torque detection mechanism, and an air consumption detection mechanism. Chinese Patent ZL201910476749.6 discloses an intelligent wrench control system, including a power source, a torque controller, a power wrench, and a torque measurement feedback sleeve. In these patents, the torque of different tightening guns at a plurality of working positions can be calibrated. The torque of a pneumatic wrench at delivery may be detected or the torque of a wrench may be measured
| 2 LU102181 for feedback. However, only the instant torque of tightening is measured in these patents, but problems such as full-process monitoring of torque change of an air screwdriver cannot be resolved.
SUMMARY To overcome the disadvantages mentioned in the background, an objective of the present invention is to provide a device for monitoring dynamic torque of a mechanical power-close air screwdriver and a use method thereof, so that rotational degrees of freedom are added, functions such as full-process monitoring of torque output of an air screwdriver and the drawing and printing of a torque change curve can be implemented, and quality assessment can be performed on an air screwdriver at delivery or during use in factory, thereby overcoming the deficiencies in the prior art.
The objective of the present invention may be achieved by the following technical solutions. A device for monitoring dynamic torque of a mechanical power-close air screwdriver is provided, including a dovetail-groove bottom plate, a to-be-tested air screwdriver fastening unit, a torque transmission unit, a torque measurement unit, and a drive unit, where the to-be-tested air screwdriver fastening unit, the torque transmission unit, the torque measurement unit, and the drive unit are sequentially mounted on the dovetail-groove bottom plate from left to right; and the to-be-tested air screwdriver fastening unit is connected to the torque transmission unit, and transmits the torque of a to-be-tested air screwdriver to the torque measurement unit through the torque transmission unit, the torque measurement unit monitors the torque of the to-be-tested air screwdriver in real time, and the drive unit adds rotational degrees of freedom of the device.
Further, the to-be-tested air screwdriver fastening unit includes a to-be-tested air screwdriver, an air slip ring, an air slip ring fastening bracket, a three-jaw chuck, a connecting sleeve, a fifth bearing, a third bearing seat, a first gear, and a collar, where an air inlet end of the to-be-tested air screwdriver is connected to an output end of the air slip ring by an air pipe, the air slip ring is connected to the air slip ring fastening bracket by a bolt, the air slip ring fastening bracket is fixedly mounted on the dovetail-groove bottom plate by a bolt, one end of the three-jaw chuck is clamped on a housing of the to-be-tested air screwdriver, the other end of the three-jaw chuck is connected to the connecting sleeve by a bolt, the connecting sleeve is fastened on the first gear by a bolt, an outer layer of the connecting sleeve is provided with the fifth bearing, the fifth bearing is connected to the dovetail-groove bottom plate by the third bearing seat, and the collar is sleeved on a switch of the air slip ring.
Further, the torque transmission unit includes a second gear, a third gear, a fourth gear, a first bearing, a second bearing, a third bearing, a fourth bearing, a first bearing seat, a second bearing seat, a first transmission shaft, a second transmission shaft, and a cross coupling, where the first bearing and the second bearing are mounted on the first bearing seat, the third bearing and the fourth bearing are mounted on the second bearing seat, the second gear is connected to the second transmission shaft by a flat key, the second gear is meshed with the first gear, the first gear is sleeved on the first transmission shaft, the fourth gear is connected to the first transmission shaft by a flat key, an end of the first transmission shaft is provided with a square connecting groove, the first transmission shaft is connected to the to-be-tested air screwdriver by the square connecting groove, and the first bearing seat and the second bearing seat are fastened on the dovetail-groove bottom plate by bolts.
Further, the torque measurement unit includes a dynamic torque sensor, a signal acquisition box, an industrial computer, a display screen, a printer, and an electrical control cabinet, where the dynamic torque sensor is electrically connected to the signal acquisition box by a lead, the signal acquisition box is electrically connected to the industrial computer by a lead, the signal acquisition box is fastened on the electrical control cabinet by a bolt, the industrial computer is electrically connected to the display screen by a data cable, the industrial computer is fastened on the electrical control cabinet by a bolt, the printer is connected to the industrial computer by a data cable, the printer is placed on the electrical control cabinet, and the display screen is fastened on the electrical control cabinet by a bolt.
Further, the drive unit includes a three-phase asynchronous motor and a motor inverter, the three-phase asynchronous motor is connected to the motor inverter by an electric wire, the motor inverter is fastened on the electrical control cabinet by a bolt, and the motor inverter is connected to a 220V AC power supply by an electric wire.
Further, the third gear is connected to an output shaft of the three-phase asynchronous motor and one end of the dynamic torque sensor by flat keys, the third gear is meshed with the fourth gear, and the second transmission shaft is connected to the other end of the dynamic torque sensor by the cross coupling.
A use method of a device for monitoring dynamic torque of a mechanical power-close air screwdriver is provided, including the following steps: (1) fastening and connecting a to-be-tested air screwdriver, connecting an output end of an air slip ring to an air inlet end of the to-be-tested air screwdriver by an air pipe when an
| 4 LU102181 air source is turned off, inserting a square connecting head of the to-be-tested air screwdriver into a square connecting groove end of a first transmission shaft, tightening a fastening screw of a three-jaw chuck, connecting a housing of the to-be-tested air screwdriver to a first gear by the three-jaw chuck and a connecting sleeve, tightening a collar on a switch cover of the to-be-tested air screwdriver, to enable the to-be-tested air screwdriver to be in a connected state, and tightening a bolt on an air slip ring fastening bracket to fasten the air slip ring on a dovetail-groove bottom plate; (2) powering on an electrical control cabinet, controlling a motor inverter to enable a three-phase asynchronous motor to rotate, and measuring system torque in real time by using a dynamic torque sensor and a signal acquisition box; (3) turning on the air source of the air slip ring, to enable the to-be-tested air screwdriver to start to operate, where an output end of the to-be-tested air screwdriver enables the first transmission shaft through the square connecting groove to rotate, the first transmission shaft transmits a torsional force to a fourth gear through a flat key, the fourth gear is meshed with a third gear, the third gear transmits the torsional force to one end of the dynamic torque sensor through a flat key, the housing of the to-be-tested air screwdriver transmits the torsional force to the first gear through the three-jaw chuck and the connecting sleeve, the first gear is meshed with a second gear, and the second gear transmits the torsional force to the other end of the dynamic torque sensor through a flat key, and observing a graph of a torque output curve of the air screwdriver on a display screen; (4) when the torque output curve reaches a maximum value and remains stable, turning off the air source of the air slip ring, powering off the electrical control cabinet, stopping the measurement of the dynamic torque sensor, stopping the operation of the three-phase asynchronous motor, and printing the graph of the torque output curve of the air screwdriver; and (5) loosening the collar on the switch cover of the to-be-tested air screwdriver, to disconnect the air slip ring from the to-be-tested air screwdriver, moving the air slip ring outward, loosening the fastening screw of the three-jaw chuck, pulling out the to-be-tested air screwdriver, ending the measurement, and preparing for measurement of a next air screwdriver.
Beneficial effects of the present invention: Compared with the prior art, in the present invention, rotational degrees of freedom are added. The to-be-tested air screwdriver continuously rotates, and the torque can be monitored in real time, torque measurement can be provided for upright square-head air
| > LU102181 screwdrivers of various sizes, and it can be monitored whether an air source of the air screwdriver provides a stable input and whether a calibrated torque of the air screwdriver reaches a calibrated value, to perform quality assessment on fixed-torque air screwdrivers at delivery.
In addition, the present invention also has advantages such as a compact structure, low power-close power consumption, stable and reliable operation, low equipment costs, and simple operations.
BRIEF DESCRIPTION OF THE DRAWINGS The present invention is further described below with reference to the accompanying drawings.
FIG. 1 is a schematic diagram of an overall structure according to the present invention; FIG. 2 is a schematic structural diagram of a to-be-tested air screwdriver being connected to a first transmission shaft according to the present invention; FIG. 3 is a schematic structural diagram of a connecting sleeve being connected to a first gear according to the present invention; FIG. 4 is a schematic structural diagram of a first bearing seat according to the present invention; and FIG. 5 is a schematic structural diagram of a second bearing seat according to the present invention.
Reference signs in the figures are as follows:
11. To-be-tested air screwdriver; 12. Air slip ring; 13. Air slip ring fastening bracket; 14. Three-jaw chuck; 15. Connecting sleeve; 16. Fifth bearing; 17. Third bearing seat; 18. First gear; 19. Dovetail-groove bottom plate; 110. Collar; 21. Dynamic torque sensor; 22. Signal acquisition box; 23. Industrial computer; 24. Display screen; 25. Printer; 26. Electrical control cabinet; 31. Three-phase asynchronous motor; 32. Motor inverter; 41. Second gear;
42. Third gear; 43. Fourth gear; 44. First bearing; 45. Second bearing; 46. Third bearing; 47. Fourth bearing; 48. First bearing seat; 49. Second bearing seat; 410. First transmission shaft;
411. Second transmission shaft; and 412. Cross coupling.
DETAILED DESCRIPTION The following clearly and completely describes the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Apparently, the described embodiments are some of rather than all of the embodiments of the present invention. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.
In the description of the present invention, it should be understood that orientation or position relationships indicated by the terms such as "hole", "above", "below", "thickness", "top", "middle", "length", "inside", and "around" are used only for ease and brevity of description of the present invention, rather than indicating or implying that the mentioned component or element need to have a particular orientation or need to be constructed and operated in a particular orientation. Therefore, such terms should not be construed as limiting of the present invention.
A device for monitoring dynamic torque of a mechanical power-close air screwdriver is provided, including a dovetail-groove bottom plate 19, a to-be-tested air screwdriver fastening unit, a torque transmission unit, a torque measurement unit, and a drive unit. The to-be-tested air screwdriver fastening unit, the torque transmission unit, the torque measurement unit, and the drive unit are sequentially mounted on the dovetail-groove bottom plate 19 from left to right. The to-be-tested air screwdriver fastening unit is connected to the torque transmission unit, and transmits the torque of a to-be-tested air screwdriver to the torque measurement unit through the torque transmission unit. The torque measurement unit monitors the torque of the to-be-tested air screwdriver in real time. The drive unit adds rotational degrees of freedom of the device.
As shown in FIG. 1 and FIG. 3, the to-be-tested air screwdriver fastening unit includes a to-be-tested air screwdriver 11, an air slip ring 12, an air slip ring fastening bracket 13, a three-jaw chuck 14, a connecting sleeve 15, a fifth bearing 16, a third bearing seat 17, a first gear 18, and a collar 110. An air inlet end of the to-be-tested air screwdriver 11 is connected to an output end of the air slip ring 12 by an air pipe. The air slip ring 12 is connected to the air slip ring fastening bracket 13 by a bolt. The air slip ring fastening bracket 13 is fixedly mounted on the dovetail-groove bottom plate 19 by a bolt. One end of the three-jaw chuck 14 is clamped on a housing of the to-be-tested air screwdriver 11. The other end of the three-jaw chuck 14 is connected to the connecting sleeve 15 by a bolt. The connecting sleeve 15 is fastened on the first gear 18 by a bolt. An outer layer of the connecting sleeve 15 is provided with the fifth bearing 16. The fifth bearing 16 is connected to the dovetail-groove bottom plate 19 by the third bearing seat 17. The collar 110 is sleeved on a switch of the air slip ring 12.
As shown in FIG. 1 to FIG. 5, the torque transmission unit includes a second gear 41, a third gear 42, a fourth gear 43, a first bearing 44, a second bearing 45, a third bearing 46, a fourth bearing 47, a first bearing seat 48, a second bearing seat 49, a first transmission shaft
410, a second transmission shaft 411, and a cross coupling 412. The first bearing 44 and the second bearing 45 are mounted on the first bearing seat 48. The third bearing 46 and the fourth bearing 47 are mounted on the second bearing seat 49. The second gear 41 is connected to the second transmission shaft 411 by a flat key. The second gear 41 is meshed with the first gear 18. The first gear 18 is sleeved on the first transmission shaft 410. The fourth gear 43 is connected to the first transmission shaft 410 by a flat key. An end of the first transmission shaft 410 is provided with a square connecting groove. The first transmission shaft 410 is connected to the to-be-tested air screwdriver 11 by the square connecting groove. The first bearing seat 48 and the second bearing seat 49 are fastened on the dovetail-groove bottom plate 19 by bolts.
The torque measurement unit includes a dynamic torque sensor 21, a signal acquisition box 22, an industrial computer 23, a display screen 24, a printer 25, and an electrical control cabinet 26. The dynamic torque sensor 21 is electrically connected to the signal acquisition box 22 by a lead. The signal acquisition box 22 is electrically connected to the industrial computer 23 by a lead. The signal acquisition box 22 is fastened on the electrical control cabinet 26 by a bolt. The industrial computer 23 is electrically connected to the display screen 24 by a data cable. The industrial computer 23 is fastened on the electrical control cabinet 26 by a bolt. The printer 25 is connected to the industrial computer 23 by a data cable. The printer 25 is placed on the electrical control cabinet 26. The display screen 24 is fastened on the electrical control cabinet 26 by a bolt.
The drive unit includes a three-phase asynchronous motor 31 and a motor inverter 32. The three-phase asynchronous motor 31 is connected to the motor inverter 32 by an electric wire. The motor inverter 32 is fastened on the electrical control cabinet 26 by a bolt. The motor inverter 32 is connected to a 220V AC power supply by an electric wire.
The third gear 42 is connected to an output shaft of the three-phase asynchronous motor 31 and one end of the dynamic torque sensor 21 by flat keys. The third gear 42 is meshed with the fourth gear 43. The second transmission shaft 411 is connected to the other end of the dynamic torque sensor 21 by the cross coupling 412.
A use method of a device for monitoring dynamic torque of a mechanical power-close air screwdriver is provided, including the following steps: (1) fastening and connecting a to-be-tested air screwdriver 11, connecting an output end of an air slip ring 12 to an air inlet end of the to-be-tested air screwdriver 11 by an air pipe when an air source is turned off, inserting a square connecting head of the to-be-tested air screwdriver 11 into a square connecting groove end of a first transmission shaft 410,
tightening a fastening screw of a three-jaw chuck 14, connecting a housing of the to-be-tested air screwdriver 11 to a first gear 18 by the three-jaw chuck 14 and a connecting sleeve 15, tightening a collar 110 on a switch cover of the to-be-tested air screwdriver 11, to enable the to-be-tested air screwdriver 11 to be in a connected state, and tightening a bolt on an air slip ring fastening bracket 13 to fasten the air slip ring 12 on a dovetail-groove bottom plate 19; (2) powering on an electrical control cabinet 26, controlling a motor inverter 32 to enable a three-phase asynchronous motor 31 to rotate, and measuring system torque in real time by using a dynamic torque sensor 21 and a signal acquisition box 22; (3) turning on the air source of the air slip ring 12, to enable the to-be-tested air screwdriver 11 to start to operate, where an output end of the to-be-tested air screwdriver 11 enables the first transmission shaft 410 through the square connecting groove to rotate, the first transmission shaft 410 transmits a torsional force to a fourth gear 43 through a flat key, the fourth gear 43 is meshed with a third gear 42, the third gear 42 transmits the torsional force to one end of the dynamic torque sensor 21 through a flat key, the housing of the to-be-tested air screwdriver 11 transmits the torsional force to the first gear 18 through the three-jaw chuck 14 and the connecting sleeve 15, the first gear 18 is meshed with a second gear 41, and the second gear 41 transmits the torsional force to the other end of the dynamic torque sensor 21 through a flat key, and observing a graph of a torque output curve of the air screwdriver on a display screen 24; (4) when the torque output curve reaches a maximum value and remains stable, turning off the air source of the air slip ring 12, powering off the electrical control cabinet 26, stopping the measurement of the dynamic torque sensor 21, stopping the operation of the three-phase asynchronous motor 31, and printing the graph of the torque output curve of the air screwdriver; and (5) loosening the collar 110 on the switch cover of the to-be-tested air screwdriver 11, to disconnect the air slip ring 12 from the to-be-tested air screwdriver 11, moving the air slip ring 12 outward, loosening the fastening screw of the three-jaw chuck 14, pulling out the to-be-tested air screwdriver 11, ending the measurement, and preparing for measurement of a next air screwdriver.
During use, a required length of the to-be-tested air screwdriver 11 is determined by moving the air slip ring fastening bracket 13 on the dovetail-groove bottom plate 19 according to an actual size requirement of the air screwdriver, and the to-be-tested air screwdriver 11 is fastened by adjusting the fastening screw on the three-jaw chuck 14. The three-phase asynchronous motor 31 is controlled by the motor inverter 32 to supply power to the entire device. The torsional force of the air screwdriver is transmitted without loss to one end of the dynamic torque sensor 21 through the first transmission shaft 410, the fourth gear 43, and the third gear 42. The torsional force of the housing of the to-be-tested air screwdriver 11 is transmitted to the other end of the dynamic torque sensor 21 through the three-jaw chuck 14, the connecting sleeve 15, the first gear 18, the second gear 41, the second transmission shaft 411, and the cross coupling 412. Data of the dynamic torque sensor 21 is acquired by the signal acquisition box 22. The data of the signal acquisition box 22 is processed by the industrial computer 23. The torque output curve of the air screwdriver is displayed on the display screen 24. The torque output curve of the air screwdriver is printed by the printer 25, to monitor whether an air source of the air screwdriver provides a stable input and whether a calibrated torque of the air screwdriver reaches a calibrated value, to perform quality assessment on fixed-torque air screwdrivers at delivery.
In the descriptions of this specification, descriptions using reference terms such as "an embodiment”, "an example", or "a specific example" indicate that specific features, structures, materials, or characteristics described with reference to the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, schematic descriptions of the foregoing terms do not necessarily refer to a same embodiment or example. In addition, the described specific features, structures, materials, or characteristics may be combined in an appropriate manner in any one or a plurality of embodiments or examples.
The basic principles, main features, and advantages of the present invention are shown and described above. A person skilled in the art should understand that the present invention is not limited by the foregoing embodiments. Descriptions in the foregoing embodiments and this specification merely illustrate the principles of the present invention. Various modifications and improvements may be made to the present invention without departing from the spirit and scope of the present invention, and such modifications and improvements shall all fall within the protection scope of the present invention.
Claims (7)
1. A device for monitoring dynamic torque of a mechanical power-close air screwdriver, comprising a dovetail-groove bottom plate (19), a to-be-tested air screwdriver fastening unit, a torque transmission unit, a torque measurement unit, and a drive unit, wherein the to-be-tested air screwdriver fastening unit, the torque transmission unit, the torque measurement unit, and the drive unit are sequentially mounted on the dovetail-groove bottom plate (19) from left to right; and the to-be-tested air screwdriver fastening unit is connected to the torque transmission unit, and transmits the torque of a to-be-tested air screwdriver to the torque measurement unit through the torque transmission unit, the torque measurement unit monitors the torque of the to-be-tested air screwdriver in real time, and the drive unit adds rotational degrees of freedom of the device.
2. The device for monitoring dynamic torque of a mechanical power-close air screwdriver according to claim 1, wherein the to-be-tested air screwdriver fastening unit comprises a to-be-tested air screwdriver (11), an air slip ring (12), an air slip ring fastening bracket (13), a three-jaw chuck (14), a connecting sleeve (15), a fifth bearing (16), a third bearing seat (17), a first gear (18), and a collar (110), wherein an air inlet end of the to-be-tested air screwdriver (11) is connected to an output end of the air slip ring (12) by an air pipe, the air slip ring (12) is connected to the air slip ring fastening bracket (13) by a bolt, the air slip ring fastening bracket (13) is fixedly mounted on the dovetail-groove bottom plate (19) by a bolt, one end of the three-jaw chuck (14) is clamped on a housing of the to-be-tested air screwdriver (11), the other end of the three-jaw chuck (14) is connected to the connecting sleeve (15) by a bolt, the connecting sleeve (15) is fastened on the first gear (18) by a bolt, an outer layer of the connecting sleeve (15) is provided with the fifth bearing (16), the fifth bearing (16) is connected to the dovetail-groove bottom plate (19) by the third bearing seat (17), and the collar (110) is sleeved on a switch of the air slip ring (12).
3. The device for monitoring dynamic torque of a mechanical power-close air screwdriver according to claim 1, wherein the torque transmission unit comprises a second gear (41), a third gear (42), a fourth gear (43), a first bearing (44), a second bearing (45), a third bearing (46), a fourth bearing (47), a first bearing seat (48), a second bearing seat (49), a first transmission shaft (410), a second transmission shaft (411), and a cross coupling (412), wherein the first bearing (44) and the second bearing (45) are mounted on the first bearing seat (48), the third bearing (46) and the fourth bearing (47) are mounted on the second bearing seat (49), the second gear (41) is connected to the second transmission shaft (411) by a flat key, the second gear (41) is meshed with the first gear (18), the first gear (18) is sleeved on the first transmission shaft (410), the fourth gear (43) is connected to the first transmission shaft (410) by a flat key, an end of the first transmission shaft (410) is provided with a square connecting groove, the first transmission shaft (410) is connected to the to-be-tested air screwdriver (11) by the square connecting groove, and the first bearing seat (48) and the second bearing seat (49) are fastened on the dovetail-groove bottom plate (19) by bolts.
4. The device for monitoring dynamic torque of a mechanical power-close air screwdriver according to claim 1, wherein the torque measurement unit comprises a dynamic torque sensor (21), a signal acquisition box (22), an industrial computer (23), a display screen (24), a printer (25), and an electrical control cabinet (26), wherein the dynamic torque sensor (21) is electrically connected to the signal acquisition box (22) by a lead, the signal acquisition box (22) is electrically connected to the industrial computer (23) by a lead, the signal acquisition box (22) is fastened on the electrical control cabinet (26) by a bolt, the industrial computer (23) is electrically connected to the display screen (24) by a data cable, the industrial computer (23) is fastened on the electrical control cabinet (26) by a bolt, the printer (25) is connected to the industrial computer (23) by a data cable, the printer (25) is placed on the electrical control cabinet (26), and the display screen (24) is fastened on the electrical control cabinet (26) by a bolt.
5. The device for monitoring dynamic torque of a mechanical power-close air screwdriver according to claim 3, wherein the drive unit comprises a three-phase asynchronous motor (31) and a motor inverter (32), the three-phase asynchronous motor (31) is connected to the motor inverter (32) by an electric wire, the motor inverter (32) is fastened on the electrical control cabinet (26) by a bolt, and the motor inverter (32) is connected to a 220V AC power supply by an electric wire.
6. The device for monitoring dynamic torque of a mechanical power-close air screwdriver according to claim 5, wherein the third gear (42) is connected to an output shaft of the three-phase asynchronous motor (31) and one end of the dynamic torque sensor (21) by flat keys, the third gear (42) is meshed with the fourth gear (43), and the second transmission shaft (411) is connected to the other end of the dynamic torque sensor (21) by the cross coupling (412).
7. A use method of a device for monitoring dynamic torque of a mechanical power-close air screwdriver, comprising the device for monitoring dynamic torque of a mechanical power-close air screwdriver according to any one of claims 1 to 6, wherein the use method comprises the following steps:
(1) fastening and connecting a to-be-tested air screwdriver (11), connecting an output end of an air slip ring (12) to an air inlet end of the to-be-tested air screwdriver (11) by an air pipe when an air source is turned off, inserting a square connecting head of the to-be-tested air screwdriver (11) into a square connecting groove end of a first transmission shaft (410), tightening a fastening screw of a three-jaw chuck (14), connecting a housing of the to-be-tested air screwdriver (11) to a first gear (18) by the three-jaw chuck (14) and a connecting sleeve (15), tightening a collar (110) on a switch cover of the to-be-tested air screwdriver (11), to enable the to-be-tested air screwdriver (11) to be in a connected state, and tightening a bolt on an air slip ring fastening bracket (13) to fasten the air slip ring (12) on a dovetail-groove bottom plate (19); (2) powering on an electrical control cabinet (26), controlling a motor inverter (32) to enable a three-phase asynchronous motor (31) to rotate, and measuring system torque in real time by using a dynamic torque sensor (21) and a signal acquisition box (22); (3) turning on the air source of the air slip ring (12), to enable the to-be-tested air screwdriver (11) to start to operate, wherein an output end of the to-be-tested air screwdriver (11) enables the first transmission shaft (410) through the square connecting groove to rotate, the first transmission shaft (410) transmits a torsional force to a fourth gear (43) through a flat key, the fourth gear (43) is meshed with a third gear (42), the third gear (42) transmits the torsional force to one end of the dynamic torque sensor (21) through a flat key, the housing of the to-be-tested air screwdriver (11) transmits the torsional force to the first gear (18) through the three-jaw chuck (14) and the connecting sleeve (15), the first gear (18) is meshed with a second gear (41), and the second gear (41) transmits the torsional force to the other end of the dynamic torque sensor (21) through a flat key, and observing a graph of a torque output curve of the air screwdriver on a display screen (24); (4) when the torque output curve reaches a maximum value and remains stable, turning off the air source of the air slip ring (12), powering off the electrical control cabinet (26), stopping the measurement of the dynamic torque sensor (21), stopping the operation of the three-phase asynchronous motor (31), and printing the graph of the torque output curve of the air screwdriver; and (5) loosening the collar (110) on the switch cover of the to-be-tested air screwdriver (11), to disconnect the air slip ring (12) from the to-be-tested air screwdriver (11), moving the air slip ring (12) outward, loosening the fastening screw of the three-jaw chuck (14),
pulling out the to-be-tested air screwdriver (11), ending the measurement, and preparing for measurement of a next air screwdriver.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011099316.2A CN112268645B (en) | 2020-10-14 | 2020-10-14 | Mechanical power closed type wind batch dynamic torque monitoring device and using method thereof |
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| LU102181B1 true LU102181B1 (en) | 2021-05-11 |
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| LU102181A LU102181B1 (en) | 2020-10-14 | 2020-11-06 | Device for monitoring dynamic torque of mechanical power-close air screwdriver and use method thereof |
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| LU (1) | LU102181B1 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP4197551B2 (en) * | 1998-07-31 | 2008-12-17 | 富士機械製造株式会社 | Method and apparatus for measuring preload dynamic torque of ball screw |
| CN100573072C (en) * | 2007-05-11 | 2009-12-23 | 洛阳轴研科技股份有限公司 | Automatic test method of automobile air conditioner compressor electromagnetic clutch dynamic torque and device |
| CN207071789U (en) * | 2017-08-18 | 2018-03-06 | 深圳市力准传感技术有限公司 | Electric screwdriver static torque sensor |
| CN208937222U (en) * | 2018-09-18 | 2019-06-04 | 广州澳金工业自动化系统有限公司 | A kind of high-precision torque characteristics test device |
| CN211425756U (en) * | 2019-12-26 | 2020-09-04 | 方圆科创检测认证(武汉)有限公司 | Calibration device for torque of screwdriver |
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| CN112268645B (en) | 2022-02-22 |
| CN112268645A (en) | 2021-01-26 |
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Effective date: 20210511 |