CN213120926U - Electric torque wrench - Google Patents
Electric torque wrench Download PDFInfo
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- CN213120926U CN213120926U CN202021733145.XU CN202021733145U CN213120926U CN 213120926 U CN213120926 U CN 213120926U CN 202021733145 U CN202021733145 U CN 202021733145U CN 213120926 U CN213120926 U CN 213120926U
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- torque sensor
- torque
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- sleeve
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- 238000001514 detection method Methods 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 238000004026 adhesive bonding Methods 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 230000005489 elastic deformation Effects 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
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Abstract
The utility model relates to a torque sensor technical field, concretely relates to electric torque wrench, include at least: a torque sensor 14, a strain gauge 15; the strain gauge 15 is disposed on the outer circumferential surface of the torque sensor 14.
Description
Technical Field
The utility model relates to a torque sensor technical field, concretely relates to electric torque wrench.
Background
Torque is generally detected by a torque sensor, which is widely used in various industrial torque detection fields, and the principle of the torque sensor is to detect elastic deformation of a torsion shaft of the torque sensor and calculate the magnitude of the torque. Electric shafts with torque control function are widely used in automatic equipment, especially in executing structures of robots frequently, and they can control torque relatively accurately in the process of bolt tightening so that bolts do not loosen in a working state for a long time, but most of bolt tightening shafts control the torque and the current of a motor in a nearly proportional relationship at a certain stage of working, so that the control accuracy is not very high; and as the range of the detected torque is increased, the torsion shaft of the torque sensor is correspondingly thickened to bear larger torque, so that the volume and the weight of the torque sensor are greatly increased, and the torque sensor is inconvenient to manufacture and use.
Therefore, how to provide a torque sensor mechanism with a simple structure, higher accuracy and higher detection efficiency is a technical problem to be solved by those skilled in the art.
SUMMERY OF THE UTILITY MODEL
In order to solve the above technical problem, a first aspect of the present invention provides a torque sensor for an electric axle, including at least: a torque sensor 14, a strain gauge 15; the strain gauge 15 is disposed on the outer circumferential surface of the torque sensor 14.
As a preferable technical solution, the upper end of the torque sensor 14 is provided with a screw hole 6.
As a preferable technical solution, the lower end of the torque sensor 14 is provided with a concave-convex structure.
As a preferred solution, the strain gauges 15 are arranged symmetrically on the torque sensor 14.
As a preferable technical solution, the number of the strain gauges 15 is 2 or more.
As a preferred technical solution, the strain gauge 15 and the torque sensor 14 are connected by means of adhesion.
A second aspect of the present invention provides an electric torque wrench, which at least includes the torque sensor for an electric shaft as described above.
As a preferred aspect, the electric torque wrench further includes: the device comprises an output guide sleeve 1, an output planet carrier 2, an inner gear ring 3, a planet wheel 4, a positioning sleeve 5, a screw hole 6, a shell 7, a screwdriver head 8, a quick-release sleeve 9, a retainer ring 10, a sun wheel 11, a direct current motor 12, a motor power line 13, a torque signal line 16 and a motor output shaft 17; the motor power line 13 is connected with the direct current motor 12; the torque signal line 16 is connected with the torque sensor 14; the motor output shaft 17 is connected with the sun gear 11; the positioning sleeve 5 is arranged at the lower end of the shell 7; the planet wheel 4 is contacted with the side surface of the sun wheel 11; the retainer ring 10 is used for fixing the output guide sleeve 1; the upper end of the inner gear ring 3 is connected with the lower end of the torque sensor 14 in a jogged manner; the lower end of the output planet carrier 2 is connected with a quick-release sleeve 9; the lower end of the quick-release sleeve 9 is connected with a screwdriver head 8.
As a preferable technical solution, the outer diameter of the ring gear 3 contacts with the positioning sleeve 5 only at two places, and the rest does not contact.
Preferably, the dc motor 12 and the torque sensor 14 are fixed by a screw hole 6.
Has the advantages that: the invention provides a torque sensor for an electric shaft and an electric torque wrench; the strain gauge is arranged on the outer circular surface of the torque sensor, the torque sensor is applied to the electric torque wrench, and the upper end of the torque sensor and the lower end of the direct current motor are fixed through the screw hole; the lower end of the torque sensor is provided with a concave-convex structure which is embedded and connected with the upper end of the inner gear ring; the torque sensor is inserted between the inner gear ring and the direct current motor, the reverse torque of the inner gear ring of the planetary reducer directly acts on the lower end of the torque sensor, and the tangential force of the inner gear ring and the sun gear is transmitted to the lower end of the torque sensor through the embedded concave-convex surface, so that the torque control precision of the electric shaft is further improved, and the torque control device is particularly applied to the field of the electric shaft;
the torque sensor for the electric shaft can directly read out a torque signal and control the motor by using the torque signal, and compared with the prior art, the torque sensor effectively solves the problem of poor torque value precision;
furthermore, the utility model provides a torque sensor satisfies the formula of twisting reverse of hollow circle, can produce and meet an emergency, especially sets up the foil gage on torque sensor's excircle to constitute the electric bridge, just can acquire the produced strain signal of moment of torsion.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic view of an electric torque wrench according to embodiment 2.
Description of the symbols: 1-outputting a guide sleeve; 2-output planet carrier; 3-inner gear ring; 4-a planet wheel; 5-positioning sleeve; 6-screw hole; 7-shell; 8-a screwdriver head; 9-quick-release sleeve; 10-a retainer ring; 11-sun gear; 12-a direct current motor; 13-motor power line; 14-a torque sensor; 15-strain gage; 16-torque signal line; 17-motor shaft out.
Detailed Description
The contents of the present invention can be more easily understood by referring to the following detailed description of the preferred embodiments of the present invention and the included examples. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. In case of conflict, the present specification, including definitions, will control.
The singular forms "a", "an" and "the" include plural referents unless the context clearly dictates otherwise. "optional" or "any" means that the subsequently described event or events may or may not occur, and that the description includes instances where the event occurs and instances where it does not.
Approximating language, as used herein throughout the specification and claims, is intended to modify a quantity, such that the invention is not limited to the specific quantity, but includes modified portions that approximate the quantity, such that the modified portion does not materially alter the basic function of the invention. Accordingly, the use of "about" to modify a numerical value means that the invention is not limited to the precise numerical value. In some instances, the approximating language may correspond to the precision of an instrument for measuring the value. In the present description and claims, range limitations may be combined and/or interchanged, including all sub-ranges contained therein if not otherwise stated.
In addition, the indefinite articles "a" and "an" preceding an element or component of the invention are not intended to limit the number requirement (i.e., the number of occurrences) of the element or component. Thus, "a" or "an" should be read to include one or at least one, and the singular form of an element or component also includes the plural unless the stated number clearly indicates that the singular form is intended.
In order to solve the above technical problem, a first aspect of the present invention provides a torque sensor for an electric axle, including at least: a torque sensor 14, a strain gauge 15; the strain gauge 15 is disposed on the outer circumferential surface of the torque sensor 14.
In a preferred embodiment, the torque sensor 14 is provided with a threaded hole 6 at its upper end.
In a preferred embodiment, the lower end of the torque sensor 14 is provided with a relief structure.
In a preferred embodiment, the strain gauges 15 present a symmetrical arrangement on the torque sensor 14.
In a preferred embodiment, the number of strain gauges 15 is 2 or more.
In a preferred embodiment, the number of strain gauges 15 is 4.
In a preferred embodiment, the strain gauge 15 is connected to the torque sensor 14 by gluing.
A second aspect of the present invention provides an electric torque wrench, which at least includes the torque sensor for an electric shaft as described above.
In a preferred embodiment, the electric torque wrench further comprises: the device comprises an output guide sleeve 1, an output planet carrier 2, an inner gear ring 3, a planet wheel 4, a positioning sleeve 5, a screw hole 6, a shell 7, a screwdriver head 8, a quick-release sleeve 9, a retainer ring 10, a sun wheel 11, a direct current motor 12, a motor power line 13, a torque signal line 16 and a motor output shaft 17; the motor power line 13 is connected with the direct current motor 12; the torque signal line 16 is connected with the torque sensor 14; the motor output shaft 17 is connected with the sun gear 11; the positioning sleeve 5 is arranged at the lower end of the shell 7; the planet wheel 4 is contacted with the side surface of the sun wheel 11; the retainer ring 10 is used for fixing the output guide sleeve 1; the upper end of the inner gear ring 3 is connected with the lower end of the torque sensor 14 in a jogged manner; the lower end of the output planet carrier 2 is connected with a quick-release sleeve 9; the lower end of the quick-release sleeve 9 is connected with a screwdriver head 8.
In a preferred embodiment, the outer diameter of the inner gear ring 3 is in contact with the positioning sleeve 5 only at two points, the rest being free of contact.
In a preferred embodiment, the dc motor 12 and the torque sensor 14 are fixed by a screw hole 6.
Examples
The present invention will be described in detail with reference to the following examples, but the scope of the present invention is not limited to the examples and the accompanying drawings.
Example 1
Provided is a torque sensor for an electric axle, including: a torque sensor 14, a strain gauge 15; the strain gauge 15 is disposed on the outer circumferential surface of the torque sensor 14.
The upper end of the torque sensor 14 is provided with a screw hole 6.
The lower end of the torque sensor 14 is provided with a concave-convex structure.
The strain gauges 15 exhibit a symmetrical arrangement on the torque sensor 14.
The number of the strain gauges 15 is 4.
The strain gauge 15 is connected to the torque sensor 14 by means of adhesion.
Example 2
There is provided an electric torque wrench comprising a torque sensor for an electric axle as described above.
The torque sensor for an electric axle includes: a torque sensor 14, a strain gauge 15; the strain gauge 15 is disposed on the outer circumferential surface of the torque sensor 14.
The upper end of the torque sensor 14 is provided with a screw hole 6.
The lower end of the torque sensor 14 is provided with a concave-convex structure.
The strain gauges 15 exhibit a symmetrical arrangement on the torque sensor 14.
The number of the strain gauges 15 is 4.
The strain gauge 15 is connected to the torque sensor 14 by means of adhesion.
The electric torque wrench further comprises: the device comprises an output guide sleeve 1, an output planet carrier 2, an inner gear ring 3, a planet wheel 4, a positioning sleeve 5, a screw hole 6, a shell 7, a screwdriver head 8, a quick-release sleeve 9, a retainer ring 10, a sun wheel 11, a direct current motor 12, a motor power line 13, a torque signal line 16 and a motor output shaft 17; the motor power line 13 is connected with the direct current motor 12; the torque signal line 16 is connected with the torque sensor 14; the motor output shaft 17 is connected with the sun gear 11; the positioning sleeve 5 is arranged at the lower end of the shell 7; the planet wheel 4 is contacted with the side surface of the sun wheel 11; the retainer ring 10 is used for fixing the output guide sleeve 1; the upper end of the inner gear ring 3 is connected with the lower end of the torque sensor 14 in a jogged manner; the lower end of the output planet carrier 2 is connected with a quick-release sleeve 9; the lower end of the quick-release sleeve 9 is connected with a screwdriver head 8.
The outer diameter of the inner gear ring 3 is in contact with the positioning sleeve 5 at two positions, and the rest of the inner gear ring is not in contact with the positioning sleeve.
The direct current motor 12 and the torque sensor 14 are fixed through the screw hole 6.
Claims (3)
1. An electric torque wrench is characterized by at least comprising a torque sensor for an electric shaft; the torque sensor for an electric axle includes: a torque sensor (14), a strain gauge (15); the strain gauge (15) is arranged on the outer circular surface of the torque sensor (14); the electric torque wrench further comprises: the device comprises an output guide sleeve (1), an output planet carrier (2), an inner gear ring (3), a planet wheel (4), a positioning sleeve (5), a screw hole (6), a shell (7), a screwdriver head (8), a quick-release sleeve (9), a retainer ring (10), a sun wheel (11), a direct current motor (12), a motor power line (13), a torque signal line (16) and a motor output shaft (17); the motor power line (13) is connected with the direct current motor (12); the torque signal line (16) is connected with the torque sensor (14); the output shaft (17) of the motor is connected with the sun gear (11); the positioning sleeve (5) is arranged at the lower end of the shell (7); the planet wheel (4) is in contact with the side surface of the sun wheel (11); the retainer ring (10) is used for fixing the output guide sleeve (1); the upper end of the inner gear ring (3) is connected with the lower end of the torque sensor (14) in a jogged mode; the lower end of the output planet carrier (2) is connected with a quick-release sleeve (9); the lower end of the quick-release sleeve (9) is connected with a screwdriver head (8).
2. Electric torque wrench according to claim 1, characterised in that the outer diameter of the ring gear (3) is in contact with the positioning sleeve (5) only in two places, the rest not.
3. The electric torque wrench according to claim 2, wherein the dc motor (12) and the torque sensor (14) are fixed by means of a screw hole (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021733145.XU CN213120926U (en) | 2020-08-18 | 2020-08-18 | Electric torque wrench |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021733145.XU CN213120926U (en) | 2020-08-18 | 2020-08-18 | Electric torque wrench |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213120926U true CN213120926U (en) | 2021-05-04 |
Family
ID=75654367
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021733145.XU Active CN213120926U (en) | 2020-08-18 | 2020-08-18 | Electric torque wrench |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213120926U (en) |
-
2020
- 2020-08-18 CN CN202021733145.XU patent/CN213120926U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Weizhong Hardware Factory, Huanggu Town, Pinghu City Assignor: SHANGHAI YOUBAI MACHINERY CO.,LTD. Contract record no.: X2024980013783 Denomination of utility model: An electric torque wrench Granted publication date: 20210504 License type: Common License Record date: 20240904 |