CN117664409A - Torsion sensing device of power tool - Google Patents
Torsion sensing device of power tool Download PDFInfo
- Publication number
- CN117664409A CN117664409A CN202211038523.6A CN202211038523A CN117664409A CN 117664409 A CN117664409 A CN 117664409A CN 202211038523 A CN202211038523 A CN 202211038523A CN 117664409 A CN117664409 A CN 117664409A
- Authority
- CN
- China
- Prior art keywords
- sheath
- inner housing
- power
- bearing
- locking holes
- 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.)
- Pending
Links
- 230000000149 penetrating effect Effects 0.000 claims description 4
- 230000005540 biological transmission Effects 0.000 description 5
- UQMRAFJOBWOFNS-UHFFFAOYSA-N butyl 2-(2,4-dichlorophenoxy)acetate Chemical compound CCCCOC(=O)COC1=CC=C(Cl)C=C1Cl UQMRAFJOBWOFNS-UHFFFAOYSA-N 0.000 description 5
- 238000010586 diagram Methods 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Abstract
The invention relates to a torsion sensing device of a power tool, which comprises an outer shell, a power structure, a sheath, an inner shell, a bearing set and a torsion sensor. The power structure is arranged in the outer shell, and comprises a power body and a driving shaft. The sheath is sleeved on the power body. The bearing group comprises a front bearing arranged between the sheath and the inner shell, and a rear bearing arranged between the inner shell and the outer shell. The torsion sensor is disposed on the inner housing to provide an accurate torsion value.
Description
Technical Field
The present invention relates to a power tool, and more particularly, to a torque sensor for a power tool.
Background
The power tool with torque sensor can be used to detect torque and transmit signal when the torque reaches preset value to control the power body to stop running. Further, since a torque sensor of a general power tool is generally provided in a transmission mechanism, the torque sensor is rotated for a long time with the operation of the transmission mechanism, and thus the electric connection is affected due to the problems of breakage of wires, poor contact, and the like, resulting in damage to the power tool. In addition, when the power tool operates, the transmission mechanism connected with the tool head can vibrate or deform and the like, so that the torsion value detected by the torque sensor is affected, and the accuracy of the torque sensor is reduced.
Disclosure of Invention
The main object of the present invention is to provide a torque sensor for a power tool, in which the torque sensor is disposed on the inner housing without being directly affected by the vibration of the power body, thereby providing an accurate torque value.
Another object of the present invention is to provide a torque sensor of a power tool, in which the torque sensor is not directly fixed to a power transmission component but does not rotate with the power device, so as to avoid the problems of wire breakage and poor contact, and to increase convenience in assembly.
In order to achieve at least the above-mentioned main object, the present invention is a torque sensor for a power tool, which includes an outer housing, a power structure, a sheath, an inner housing, a bearing set and a torque sensor. The power structure is arranged in the outer shell, and comprises a power body with a driving shaft. The sheath is sleeved on the power body. The bearing group comprises a front bearing and a rear bearing, wherein the front bearing is arranged between the sheath and the inner shell, and the rear bearing is arranged between the inner shell and the outer shell. At least one torsion sensor is disposed on the inner housing.
Optionally, the sheath has a sheath front side proximate the drive shaft, the front bearing being located on the sheath front side.
Optionally, the inner housing sleeve has an inner housing rear side remote from the drive shaft, the rear bearing being located at the inner housing rear side.
Optionally, a plurality of front pawls are provided at the front end edge of the sheath, and a plurality of rear pawls are provided at the rear end edge of the sheath.
Optionally, the power structure further comprises a pair of motor fixing plates, the pair of motor fixing plates comprises a front fixing plate and a rear fixing plate which are arranged on opposite sides of the sheath, a plurality of front protruding plates are arranged at intervals on the periphery of the front fixing plate, a plurality of rear protruding plates are arranged at intervals on the periphery of the rear fixing plate, the front fixing plate is positioned at one end of the front side of the sheath through mutual buckling of each front protruding plate and each front pawl, and the rear fixing plate is positioned at one end of the rear side of the sheath through mutual buckling of each rear protruding plate and each rear pawl.
Optionally, the power structure further includes a plurality of front locking members, the front fixing piece is provided with a plurality of first locking holes, the power body is correspondingly provided with a plurality of second locking holes, and the front fixing piece is fixed on the power body by penetrating each of the first locking holes and each of the second locking holes through each of the front locking members.
Optionally, the inner shell cover has an inner shell front side close to the driving shaft, and an end edge of the inner shell cover on the inner shell front side is fixedly connected with an inner wall surface of the outer shell.
Optionally, the inner shell is sleeved with a rear baffle formed at the rear side of the inner shell, and the sheath is fixedly connected with the rear baffle through the rear fixing piece so as to enable the inner shell to rotate in a linkage way.
Optionally, the power structure further comprises a plurality of rear locking pieces, the rear fixing piece is provided with a plurality of third locking holes, the rear baffle piece is correspondingly provided with a plurality of fourth locking holes, and the rear fixing piece is fixed on the inner shell through the fourth locking holes and the third locking holes.
Optionally, the number of torsion sensors is a pair, the pair of torsion sensors being disposed on opposite sides of the inner housing.
Compared with the prior art, the torsion sensing device of the power tool is provided with the torsion sensor on the inner shell, and the torsion of the power body is transmitted to the torsion sensor through the sheath and the inner shell, when the power body is in a reverse rotation state after exceeding the preset torsion and is transmitted to the sheath and the inner shell and then transmitted to the torsion sensor, the torsion sensor is not directly fixed on a component for transmitting power, so that the torsion sensor is not affected by the vibration of the power body; therefore, the torsion sensor can perform torsion sensing on the power body, so that an accurate torsion value is provided, and the practicability in use is improved.
Drawings
Fig. 1 is a schematic perspective view of a torsion sensor according to the present invention.
Fig. 2 is a schematic perspective view of the torque sensor device with the outer casing removed.
Fig. 3 is an exploded perspective view of the torque sensor according to the present invention with the outer housing removed.
Fig. 4 and 5 are sectional views showing the combination of the torsion sensor apparatus according to the present invention.
Fig. 6 is a schematic diagram of an application of the torsion sensing device of the present invention.
In the figure:
a torsion sensing device; 10, an outer shell; 20, a power structure; 21, a power body; 210 a second locking hole; 211, driving shaft; 22, a motor fixing piece; 221, front fixing piece; 2210 a first keyhole; 2211, front tab; 222, a rear fixing piece; 2220, third locking hole; 2221, rear tab; 23, front locking piece; 24, rear locking piece; 30, a sheath; 31, the front side of the sheath; 311, front pawl; 32, the rear side of the sheath; 321, rear pawl; 40, an inner shell; 401 a groove; 41, the front side of the inner shell; 411 front flange; 42, the rear side of the inner shell; 421, a rear baffle; 4210 a fourth lock hole; 50, bearing group; 51, front bearing; 52, a rear bearing; 60, a torsion sensor; 70, a gearbox.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and specific examples, which are not intended to limit the invention, so that those skilled in the art may better understand the invention and practice it.
Referring to fig. 1 to 3, a schematic perspective view of the torsion sensing device with the outer casing removed, and a schematic perspective exploded view of the torsion sensing device with the outer casing removed according to the present invention are shown respectively. The invention relates to a torsion sensing device 1 of a power tool, which comprises an outer shell 10, a power structure 20, a sheath 30, an inner shell 40, a bearing set 50 and at least one torsion sensor 60. The power structure 20 is installed in the outer housing 10, and the power structure 20 includes a power body 21. The sheath 30 is sleeved on the power body 21, and the inner shell 40 is sleeved on the sheath 30. The bearing set 50 is disposed between the power body 21 and the outer housing 10. The torsion sensor 60 is disposed on the inner housing 40. Accordingly, the power tool can measure the torque value through the torque sensor 60 and control the operation of the power body 21 accordingly. The torsion sensing apparatus 1 will be described in more detail later.
The outer housing 10 is the outer housing of a power tool. The power structure 20 is provided in the outer case 10. The power structure 20 includes a power body 21, and the power body 21 has a driving shaft 211. In this embodiment, the power body 21 is an electric motor, which uses a battery as a power source to drive the driving shaft 211 to rotate. However, in practical implementation, the power body 21 may also be configured as a pneumatic motor, which uses compressed air as a power source to drive the driving shaft 211 to rotate.
The sheath 30 is disposed over the power body 21, and the sheath 30 has a sheath front side 31 proximate the drive shaft 211 and an opposite sheath rear side 32. The front side 31 of the sheath is provided with a plurality of front pawls 311 at its end edge. The end edge of the sheath rear side 32 is provided with a plurality of rear pawls 321.
The inner housing 40 is disposed outside the sheath 30, and the inner housing 40 has an inner housing front side 41 near the driving shaft 211 and an inner housing rear side 42 far from the driving shaft 211. The inner shell 40 is formed with a front flange 411 at the end edge of the inner shell front side 41 and a rear baffle 421 at the inner shell rear side 42.
The bearing set 50 includes a front bearing 51 and a rear bearing 52. The front bearing 51 is disposed between the sheath 30 and the inner housing 40. The rear bearing 52 is disposed between the inner housing 40 and the outer housing 10. Specifically, the front bearing 51 is located on the sheath front side 31; also, the rear bearing 52 is located on the inner housing rear side 42.
In an embodiment of the present invention, the power structure 20 further includes a pair of motor stator plates 22. The pair of motor fixing pieces 22 includes a front fixing piece 221 and a rear fixing piece 222 disposed at opposite sides of the sheath 30. The front fixing piece 221 has a plurality of front protruding pieces 2211 spaced from the periphery thereof. The rear fixing piece 222 has a plurality of rear tabs 2221 spaced apart from each other at a peripheral edge thereof.
Specifically, the front anchor tab 221 is positioned at one end of the sheath front side 31 by each of the front tabs 2211 snapping into engagement with the front pawls 311 of the sheath 30. The rear fixing piece 222 is positioned at one end of the rear side 32 of the sheath by the rear tabs 2221 engaging with the rear pawls 321 of the sheath 30.
In one embodiment of the present invention, the power structure 20 further includes a plurality of front locking members 23 and a plurality of rear locking members 24. The front fixing piece 221 is provided with a plurality of first locking holes 2210, and the power body 21 is correspondingly provided with a plurality of second locking holes 210. The front fixing piece 221 is fixed to the power body 21 by penetrating each of the first locking holes 2210 and each of the second locking holes 210 through each of the front locking pieces 23. In addition, the rear fixing piece 222 is provided with a plurality of third locking holes 2220, and the rear baffle 421 of the inner housing 40 is correspondingly provided with a plurality of fourth locking holes 4210. The rear fixing piece 222 is fixed to the inner housing 40 by penetrating each of the fourth locking holes 4210 and each of the third locking holes 2220 through each of the rear locking pieces 24.
Furthermore, the torsion sensor 60 may be provided as a strain gauge provided on the outer peripheral surface of the inner housing 40. In the present embodiment, the number of the torsion sensors 60 is set as a pair. The pair of torsion sensors 60 are disposed on opposite sides of the inner housing 40. In an embodiment of the present invention, a groove 401 is disposed on the outer edge surface of the inner housing 40, and the torsion sensor 60 is disposed in the groove 401. It is noted that the provision of the recess 401 may provide a better positioning of the torsion sensor 60.
Referring to fig. 4 and 5, a sectional view of the torsion sensor according to the present invention is shown. As shown in fig. 4, the power structure 20 of the present invention is provided in the outer case 10. The front bearing 51 is disposed between the sheath 30 and the inner housing 40 and is located on the sheath front side 31. The rear bearing 52 is disposed between the inner housing shell 40 and the outer housing shell 10 and is located on the inner housing rear side 42. The pair of motor fixing pieces 22 are provided on opposite sides of the power body 21. The front flange 411 of the inner case 40 is fixedly attached to the inner wall surface of the outer case 10. The rear baffle 421 of the inner housing 40 abuts against the inner wall surface of the outer housing 10. Since the inner housing front side 41 is fixedly connected to the outer housing 10, the inner housing rear side 42 does not rotate together with the inner housing front side 41 when rotated, thereby the inner housing 40 is deformed such that the torsion sensor 60 provided on the inner housing 40 receives a deformation signal.
Accordingly, when the power body 21 generates the reverse force, the reverse force is transmitted to the rear baffle 421 by the rear fixing piece 222 to rotate, thereby driving the inner shell 40 to generate rotational deformation.
Referring to fig. 5, in the present embodiment, the pair of torsion sensors 60 are disposed on opposite sides of the inner sheath 40. The torsion generated by the power body 21 is transmitted to each torsion sensor 60 through the sheath 30 and the inner sheath 40. Specifically, when the power body 21 is subjected to resistance, a reverse force is generated. The reversing force is transmitted to the sheath 30 and the inner housing 40, and then to the torsion sensor 60, so that the torsion sensor 60 generates a signal.
Fig. 6 is a schematic diagram illustrating an application of the torsion sensor according to the present invention. The torque sensor device 1 of the present invention further comprises a gearbox 70. The gearbox 70 is connected to a drive shaft 211 of the power body 21 to provide the required rotational output. Furthermore, the power tool includes a battery and a control board (not shown). The battery and the control board are disposed in the outer housing 10, and the control board is electrically connected to the power body 21 and the torsion sensor 60.
Accordingly, when the operation of the power body 21 exceeds the predetermined torque, the control board receives the signal transmitted from the torque sensor 60 and immediately stops the operation of the power body 21.
The torque sensor 60 of the present invention is not directly fixed to the power transmission unit, and is not affected by the vibration of the power body 21. Accordingly, the torsion sensor 60 can perform torsion sensing on the power body 21, thereby providing an accurate torsion value.
The above-described embodiments are merely preferred embodiments for fully explaining the present invention, and the scope of the present invention is not limited thereto. Equivalent substitutions and modifications will occur to those skilled in the art based on the present invention, and are intended to be within the scope of the present invention. The protection scope of the invention is subject to the claims.
Claims (10)
1. A torque sensing device for a power tool, comprising:
an outer housing;
the power structure is arranged in the outer shell and comprises a power body, and the power body is provided with a driving shaft;
a sheath sleeved on the power body;
an inner shell sleeved outside the sheath;
the bearing group comprises a front bearing and a rear bearing, the front bearing is arranged between the sheath and the inner shell, and the rear bearing is arranged between the inner shell and the outer shell; and
at least one torsion sensor is arranged on the inner shell.
2. The torque sensing device of claim 1, wherein the sheath has a sheath front side proximate the drive shaft, the front bearing being located on the sheath front side.
3. The torque sensor apparatus of claim 2, wherein the inner housing sleeve has an inner housing rear side remote from the drive shaft, the rear bearing being located at the inner housing rear side.
4. The torque sensor of claim 3, wherein the front end of the sheath is provided with a plurality of front pawls and the rear end of the sheath is provided with a plurality of rear pawls.
5. The torque force sensing device of claim 4, wherein the power structure further comprises a pair of motor stator plates comprising a front stator plate and a rear stator plate disposed on opposite sides of the sheath, the front stator plate being circumferentially spaced apart by a plurality of front tab plates, the rear stator plate being circumferentially spaced apart by a plurality of rear tab plates, the front stator plate being positioned at one end of the sheath on the front side by each of the front tab plates and each of the front pawl plates being mutually engaged, the rear stator plate being positioned at one end of the sheath on the rear side by each of the rear tab plates and each of the rear pawl plates being mutually engaged.
6. The torque sensor of claim 5, wherein the power structure further comprises a plurality of front locking members, the front fixing plate is provided with a plurality of first locking holes, the power body is correspondingly provided with a plurality of second locking holes, and the front fixing plate is fixed on the power body by penetrating each of the first locking holes and each of the second locking holes through each of the front locking members.
7. The torque sensor of claim 3, wherein the inner housing has an inner housing front side adjacent to the driving shaft, and an end edge of the inner housing is fixedly connected to an inner wall surface of the outer housing.
8. The torque sensor of claim 5, wherein the inner housing has a rear baffle formed on a rear side of the inner housing, and the sheath is fixedly connected with the rear baffle through the rear fixing piece to rotate the inner housing in a linkage manner.
9. The torque sensor of claim 8, wherein the power structure further comprises a plurality of rear locking members, the rear fixing plate is provided with a plurality of third locking holes, the rear baffle plate is correspondingly provided with a plurality of fourth locking holes, and the rear fixing plate is fixed on the inner shell through the fourth locking holes and the third locking holes.
10. The torque sensing device of claim 1, wherein the number of torque sensors is one, the pair of torque sensors being disposed on opposite sides of the inner housing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211038523.6A CN117664409A (en) | 2022-08-29 | 2022-08-29 | Torsion sensing device of power tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211038523.6A CN117664409A (en) | 2022-08-29 | 2022-08-29 | Torsion sensing device of power tool |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117664409A true CN117664409A (en) | 2024-03-08 |
Family
ID=90073773
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211038523.6A Pending CN117664409A (en) | 2022-08-29 | 2022-08-29 | Torsion sensing device of power tool |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117664409A (en) |
-
2022
- 2022-08-29 CN CN202211038523.6A patent/CN117664409A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP3587674B2 (en) | Rotation angle sensor, torque sensor using this rotation angle sensor, electric power steering device using this torque sensor | |
| US4487270A (en) | Electric tool, particularly a handtool, with torque control | |
| US8353363B2 (en) | Handheld power tool device for detecting torque | |
| US20180149533A1 (en) | Axial rotation type torque sensor | |
| JP2009139187A (en) | Torque measuring device | |
| US8222850B2 (en) | Overload protection device for motor | |
| JP2001304985A (en) | Torque-measuring apparatus | |
| JP2021084627A (en) | Torque-angle sensor | |
| CN117664409A (en) | Torsion sensing device of power tool | |
| CN217434190U (en) | Power tool machine and torque force display device thereof | |
| JP3612205B2 (en) | COUPLING TOOL AND ROTATION ANGLE SENSOR USING THIS COUPLING TOOL | |
| EP4349529A1 (en) | Torque sensing device of power tool | |
| TWI823530B (en) | Torque sensing device for power tools | |
| TWI822317B (en) | Torque sensing device for power tools | |
| US20240100664A1 (en) | Torque sensing device of power tool | |
| TW202409529A (en) | Torque sensing device for power tools | |
| CN117782389A (en) | Torsion sensing device of power tool | |
| JPS61253262A (en) | Torque conversion joint | |
| TW202411027A (en) | Torque sensing device for power tools | |
| CN211477479U (en) | Torque angle sensor combination | |
| US20160377494A1 (en) | Transmission for Miniature Drive Having a Torque Measuring Element | |
| EP4353418A1 (en) | Torque sensing arrangement of power tool | |
| CN211867854U (en) | Robot joint with torque sensor | |
| CN114619393A (en) | Screw tightening machine and method for assembling screw tightening machine | |
| US20240123583A1 (en) | Torque sensing arrangement of power tool |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |