CN108466217A - A kind of electric constant torque wrench - Google Patents
A kind of electric constant torque wrench Download PDFInfo
- Publication number
- CN108466217A CN108466217A CN201810143052.2A CN201810143052A CN108466217A CN 108466217 A CN108466217 A CN 108466217A CN 201810143052 A CN201810143052 A CN 201810143052A CN 108466217 A CN108466217 A CN 108466217A
- Authority
- CN
- China
- Prior art keywords
- measuring arm
- driving wheel
- torque
- reaction force
- electric constant
- 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.)
- Withdrawn
Links
Classifications
-
- 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
- B25B23/147—Arrangement of torque limiters or torque indicators in wrenches or screwdrivers specially adapted for electrically operated wrenches or screwdrivers
-
- 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
- B25B21/00—Portable power-driven screw or nut setting or loosening tools; Attachments for drilling apparatus serving the same purpose
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Details Of Spanners, Wrenches, And Screw Drivers And Accessories (AREA)
Abstract
The present invention relates to a kind of electric constant torque wrenches, including shell, housing forward end is provided with the torque export structure that pivot center extends along the longitudinal direction, housing rear end is equipped with battery, reaction force measuring arm is fixedly installed on shell, it is provided in reaction force measuring arm for coordinating to detect the power detection structure of active force suffered by shown reaction force measuring arm with corresponding fixed component power transmission, power detection structure includes force snesor.By torque export structure to bolt or nut output torque, when tightening to a certain extent, bolt or nut cannot continue to tighten, according to active force and reaction force, shell can be by a reaction force at this time, the power detection structure of reaction force measuring arm is kept off onto a fixed component, and by the reaction force suffered by force snesor detection at this time shell, the output torque at torque export structure can be accurately conversed according to the reaction.
Description
Technical field
The present invention relates to the electric constant torque wrenches in field of power tools.
Background technology
For electric wrench as a kind of common electric tool, use is more frequent, and one of which, which can be realized, determines torque
The electric wrench of output is also known as electric constant torque wrench.Existing electric constant torque wrench includes shell, is provided on shell
Motor, that is, power source, housing forward end are provided with the loop bar that transmission mechanism is connected with motor drive, and loop bar is exported as torque
Structure is used for outside output torque.In order to realize that the output for determining torque, electric wrench have torque detection part, torque inspection
The output torque that torque export structure is detected in part is surveyed, stops power output when reaching specific torsion to realize, it is existing to determine torsion
The torque detection part of square electric wrench is substantially to be realized by detecting the electric current of electric wrench, when electric wrench applies
To after to a certain degree, the rotation of loop bar can be obstructed torque, this can influence electric current output of electric wrench, to judge that torque exports
Output torque at structure, electric current only has correspondence with output torque after all, this to pass through detection without conversion relation
Electric current judges that greatest problem existing for the form of output torque is exactly that measurement accuracy is poor, and cannot achieve makes in high-precision field
With.
In addition in the prior art, in order to enrich the function of electric wrench, electric wrench has large torque and small toward contact
Torque output capability, but it is in order to realize the conversion between large torque, the output of small torque, is also to be become by complicated transmission
Fast mechanism realizes, not only complicated, and due in entire drive path deceleration transmission it is excessive, when large torque exports
Loop bar rotating speed polar region, the working efficiency of electric wrench are poor.
Invention content
The purpose of the present invention is to provide a kind of electric constant torque wrenches, to solve in the prior art to torque export structure
Output torque accuracy of detection difference problem.
In order to solve the above technical problems, the technical solution in the present invention is as follows：
A kind of electric constant torque wrench, including shell, it is defeated that housing forward end is provided with the torque that pivot center extends along the longitudinal direction
Go out structure, housing rear end is equipped with battery, and reaction force measuring arm is fixedly installed on shell, is arranged in reaction force measuring arm
It is useful for coordinating to detect the power detection structure of active force suffered by shown reaction force measuring arm, power with corresponding fixed component power transmission
Detection structure includes force snesor.
The power detection structure includes the interior plunger shaft for being equipped with hydraulic oil, and plunger shaft is in reaction force measuring arm width direction
Both ends be individually directed movement be equipped with first piston and second piston, force snesor is the pressure sensing being connected in plunger shaft
Device.
Force snesor includes the first pressure sensor and second pressure biography for being set to reaction force measuring arm opposite sides
Sensor.
At least two are provided on shell to be sequentially connected and be used for defeated to the torque respectively with the torque export structure
Go out the power source of structure output different size torque.
It is provided with the front and back forward pass driving wheel arranged on the shell and rear driving wheel, the torque export structure are set to institute
State on forward pass driving wheel, connected by single-direction transmission structure driven between rear driving wheel and forward pass driving wheel, one of power source with
The forward pass driving wheel transmission is connected, another power source is connected with the rear driving wheel transmission.
Forward pass driving wheel is coaxially set with rear driving wheel, and the single-direction transmission structure is ratchet driving structure or unilateral bearing
Drive mechanism.
The power source being connected with forward pass driving wheel transmission is motor, and the power source being connected with the rear driving wheel transmission is
Hydraulic cylinder.
Beneficial effects of the present invention are：In use, by torque export structure to bolt or nut output torque, when tightening
To a certain extent, bolt or nut cannot continue to tighten, and according to active force and reaction force, shell can be by an anti-work at this time
Firmly, the power detection structure of reaction force measuring arm is kept off onto a fixed component, and shell at this time is detected by force snesor
Suffered reaction force can accurately converse the output torque at torque export structure according to the reaction.
Further, it either rotates forward output torque and still inverts output torque, pass through the setting of plunger shaft, it is only necessary to use
One pressure sensor reduces sensor element, can not only reduce the complex degree of structure of reaction force measuring arm, also
The cost of product can be reduced.
Further, in the present invention, by the way that the not unique power source of number is arranged, each power source is to torque export structure
Different size of torque is exported, when in face of different torque output environments, need to be using different power source power outputs only
Can, compared with prior art in, complicated transmission mechanism is only needed there are one power source come for realizing different torques outputs, knot
Structure is simple.
Further, hydraulic cylinder exports for realizing large torque, and motor exports for realizing small torque, and motor is before
When driving wheel drives the output of power output head torque, due to the presence of single-direction transmission structure, hydraulic cylinder will not be impacted,
Need using hydraulic cylinder output torque when, hydraulic cylinder by rear driving wheel, forward pass driving wheel to power output head output torque, unidirectionally
The large torque output of fast rotating speed may be implemented without slowing down in drive mechanism, improves working efficiency.
Description of the drawings
Fig. 1 is the cooperation schematic diagram of 1 middle casing and reaction force measuring arm of the embodiment of the present invention；
Fig. 2 is the cooperation schematic diagram of 1 middle rack of the embodiment of the present invention, rear driving wheel；
Fig. 3 is the cooperation schematic diagram of forward pass driving wheel, rear driving wheel in inventive embodiments 1；
Fig. 4 is the cooperation schematic diagram of 2 middle casing and reaction force measuring arm of the embodiment of the present invention；
Fig. 5 is the cooperation schematic diagram of forward pass driving wheel, rear driving wheel in inventive embodiments 3；
Fig. 6 is the cooperation schematic diagram of forward pass driving wheel, rear driving wheel in the embodiment of the present invention 4；
Fig. 7 is the cooperation schematic diagram of 5 middle casing and reaction force measuring arm of the embodiment of the present invention.
Specific implementation mode
The embodiment 1 of electric constant torque wrench is as shown in Fig. 1 ~ 3：Including shell, housing forward end is provided with defeated for torque
The torque export structure gone out.Electric wrench includes transmission mechanism, and transmission mechanism includes front and back 3 He of forward pass driving wheel being coaxially set
Driving wheel 7 afterwards, torque export structure are made of the interior square hole 4 being set on forward pass driving wheel 3.Afterwards driving wheel 7 and forward pass driving wheel it
Between be sequentially connected by single-direction transmission structure 6, the single-direction transmission structure 6 in the present embodiment is end ratchet drive mechanism, end face
Ratchet driving structure belongs to the prior art comprising the pawl that is set on rear driving wheel and is set on driving front rear end face
Ratchet, when rear driving wheel rotates, pawl can drive ratchet, forward pass wheel rotation, and when the rotation of contemporary transmissions wheel, power is not
It can transmit driving wheel backward.Housing rear end is removable to be equipped with battery, and battery can be removed and be charged.
The to be connected is additionally provided with rear driving wheel the first power source 5 for being connected of transmission and is driven with forward pass driving wheel on shell
Two power sources 2, battery are powered to power source, and in the present embodiment, the first power source is hydraulic cylinder, and the second power source is motor, preceding
Driving wheel periphery has forward pass moving teeth, is provided on the output shaft of motor and is passed with the driving front tooth engagement of forward pass driving wheel periphery
Dynamic motor output gear；Driving wheel periphery has rear driving cog afterwards, is connected on the piston rod of hydraulic cylinder after realizing and being described
The driving rack 1 of driving cog engaged transmission.
It is installed on shell 8 and is measured along the reaction force extended perpendicular to the pivot center direction of torque export structure
Arm 9, reaction force measuring arm 9 can also be used as counter-force arm use, reaction force measuring arm be equipped with plunger shaft, the one of plunger shaft
End guiding movement is equipped with first piston 10, and the other end guiding movement of plunger shaft is equipped with second piston 12, in plunger shaft
It is connected with pressure sensor 11, pressure sensor, plunger shaft and each piston are constituted for coordinating with corresponding fixed component power transmission
With the power detection structure of active force suffered by reaction force measuring arm shown in detection.When torque export structure arrives bolt output torque
To a certain degree, when bolt cannot be rotated further, according to active force, reaction force, shell can by a reaction force, at this time its
In a piston top on a certain fixing piece, pressure sensor experiences reaction force herein, and passes through plunger shaft and torque
The distance between export structure converses the torque of torque export structure at this time.
When in use, motor exports electric wrench for small torque, and hydraulic cylinder is exported for large torque, is exported in small torque
When, the premenstrual driving wheel of power of motor passes to torque export structure, and due to the use of single-direction transmission structure, hydraulic cylinder will not be by
To influence, small torque high speed output can be carried out；When needing large torque to export, the power of hydraulic cylinder driving wheel, forward pass after
Driving wheel passes to torque export structure, and large torque speedy carding process may be implemented in motor idle running, ensures the work effect of electric wrench
Rate.
In other embodiments of the invention：Single-direction transmission structure can also be unilateral bearing；Torque output head also may be used
To be disposed on the outer square head structure on forward pass driving wheel；Reaction force measuring arm may not be straight-arm, for example an arc
Shape arm or other shapes.
The embodiment 2 of electric constant torque wrench is as shown in Figure 4：Embodiment 2 as different from Example 1, power detection structure
Force snesor include the first pressure sensor 15 and second pressure sensor for being set to reaction force measuring arm opposite sides
16。
The embodiment 3 of electric constant torque wrench is as shown in Figure 5：Embodiment 3 as different from Example 1, the first power source
For a motor 5.
The embodiment 4 of electric constant torque wrench is as shown in Figure 6：Embodiment 4 as different from Example 1, the first power source 5
For a motor, the first power source, the second power source are sequentially connected with rear driving wheel, and the first power source is defeated for large torque
Going out, the second power source is exported for small torque, when the first power source works, the idle running of the second power source, the work of the second power source
When, the idle running of the first power source.
The embodiment 5 for determining square power operated wrench is as shown in Figure 7：As different from Example 1, reaction force measures embodiment 5
Arm includes the first measuring arm 9-1 being set up in parallel and the second measuring arm 9-2, the first measuring arm, the second measuring arm be can it is opposite and
The elastic arm of opposite flexible deformation, force snesor are setting and the pull pressure sensor between the first measuring arm and the second measuring arm
17.When in use, working as one of elastic arm fixed part block, the reaction force applied to bolt or nut can be by another
An outer elastic arm applies pressure to pull pressure sensor, the reaction force of the position is thus read, due to tension pressure sensing
The limitation of the device self-deformation limit, the first measuring arm, the second measuring arm generate the deformation very little that can be generated, 0.3mm with
Under, the elastic acting force generated by the deformation can be ignored, and pull pressure sensor can accurately read the reaction of the position
Power.
Claims (8)
1. a kind of electric constant torque wrench, including shell, housing forward end is provided with the torque that pivot center extends along the longitudinal direction
Export structure, housing rear end are equipped with battery, it is characterised in that：Reaction force measuring arm, reaction are fixedly installed on shell
It is provided in power measuring arm for coordinating to detect active force suffered by shown reaction force measuring arm with corresponding fixed component power transmission
Power detection structure, power detection structure includes force snesor.
2. electric constant torque wrench according to claim 1, it is characterised in that：The power detection structure includes interior equipped with liquid
The plunger shaft of pressure oil, plunger shaft the both ends of reaction force measuring arm width direction be individually directed it is mobile be equipped with first piston and
Second piston, force snesor are the pressure sensor being connected in plunger shaft.
3. electric constant torque wrench according to claim 1, it is characterised in that：Force snesor includes being set to reaction force
The first pressure sensor and second pressure sensor of measuring arm opposite sides.
4. according to the electric constant torque wrench described in claim 1 ~ 3 any one, it is characterised in that：It is provided at least on shell
Two are sequentially connected and are used for respectively with the torque export structure to torque export structure output different size torque
Power source.
5. electric constant torque wrench according to claim 4, it is characterised in that：Front and back arrangement is provided on the shell
Forward pass driving wheel and rear driving wheel, the torque export structure are set on the forward pass driving wheel, rear driving wheel and forward pass driving wheel it
Between connected by single-direction transmission structure driven, the transmission of one of power source and the forward pass driving wheel is connected, another power
Source is connected with the rear driving wheel transmission.
6. electric constant torque wrench according to claim 5, it is characterised in that：Forward pass driving wheel is set with rear driving wheel coaxial line
It sets, the single-direction transmission structure is ratchet driving structure or unilateral bearing drive mechanism.
7. electric constant torque wrench according to claim 5, it is characterised in that：It is connected with forward pass driving wheel transmission dynamic
Power source is motor, and the power source being connected with the rear driving wheel transmission is hydraulic cylinder.
8. electric constant torque wrench according to claim 1, it is characterised in that：Reaction force measuring arm includes being set up in parallel
The first measuring arm and the second measuring arm, the first measuring arm, the second measuring arm be can opposite and opposite flexible deformation elastic arm,
Force snesor is setting and the pull pressure sensor between the first measuring arm and the second measuring arm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810143052.2A CN108466217A (en) | 2018-02-11 | 2018-02-11 | A kind of electric constant torque wrench |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810143052.2A CN108466217A (en) | 2018-02-11 | 2018-02-11 | A kind of electric constant torque wrench |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108466217A true CN108466217A (en) | 2018-08-31 |
Family
ID=63266509
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810143052.2A Withdrawn CN108466217A (en) | 2018-02-11 | 2018-02-11 | A kind of electric constant torque wrench |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108466217A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022082037A1 (en) * | 2020-10-15 | 2022-04-21 | Enerpac Tool Group Corp. | Hazard detection for torque wrench |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1314552A (en) * | 1969-10-09 | 1973-04-26 | Bosch Gmbh Robert | Device for measuring the torque of electrical machines |
| JPS5969273A (en) * | 1982-10-12 | 1984-04-19 | 三菱電機株式会社 | Clamping machine for screw |
| JPS59188160U (en) * | 1983-05-31 | 1984-12-13 | 技研工業株式会社 | Double screw tightening device |
| JPS63102879A (en) * | 1986-10-17 | 1988-05-07 | 株式会社 東日製作所 | Power type nut runner |
| EP0297515A1 (en) * | 1987-06-29 | 1989-01-04 | SPS TECHNOLOGIES, Inc. | Torque and angular displacement sensing in yield threshold controlled wrenches |
| US20020139206A1 (en) * | 2001-03-27 | 2002-10-03 | Pantech International Inc. | Positive/reversed rotation control device |
| JP2004232344A (en) * | 2003-01-30 | 2004-08-19 | Nippon Sharyo Seizo Kaisha Ltd | Torque measuring device |
| JP2004283948A (en) * | 2003-03-20 | 2004-10-14 | Nitto Seiko Co Ltd | Thread fastening device |
| CN101279440A (en) * | 2007-03-30 | 2008-10-08 | 本田技研工业株式会社 | Pneumatic tappet adjustment tool |
| US20090026772A1 (en) * | 2007-07-25 | 2009-01-29 | Huang Kuohsiu David | Integrative Combined Vehicle Power Allotment Mechanism |
| JP2009160709A (en) * | 2008-01-09 | 2009-07-23 | Nitto Seiko Co Ltd | Screw part fastening device |
| JP2010137294A (en) * | 2008-12-09 | 2010-06-24 | Tohnichi Mfg Co Ltd | Torque wrench |
| CN204525310U (en) * | 2015-04-16 | 2015-08-05 | 北京劳动保障职业学院 | A kind of intelligent definite value torque wrench |
| CN104823258A (en) * | 2013-03-08 | 2015-08-05 | 三菱电机株式会社 | Operation device for switches |
| JP2016110908A (en) * | 2014-12-09 | 2016-06-20 | 株式会社東芝 | Switchgear operation mechanism |
-
2018
- 2018-02-11 CN CN201810143052.2A patent/CN108466217A/en not_active Withdrawn
Patent Citations (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1314552A (en) * | 1969-10-09 | 1973-04-26 | Bosch Gmbh Robert | Device for measuring the torque of electrical machines |
| JPS5969273A (en) * | 1982-10-12 | 1984-04-19 | 三菱電機株式会社 | Clamping machine for screw |
| JPS59188160U (en) * | 1983-05-31 | 1984-12-13 | 技研工業株式会社 | Double screw tightening device |
| JPS63102879A (en) * | 1986-10-17 | 1988-05-07 | 株式会社 東日製作所 | Power type nut runner |
| EP0297515A1 (en) * | 1987-06-29 | 1989-01-04 | SPS TECHNOLOGIES, Inc. | Torque and angular displacement sensing in yield threshold controlled wrenches |
| US20020139206A1 (en) * | 2001-03-27 | 2002-10-03 | Pantech International Inc. | Positive/reversed rotation control device |
| JP2004232344A (en) * | 2003-01-30 | 2004-08-19 | Nippon Sharyo Seizo Kaisha Ltd | Torque measuring device |
| JP2004283948A (en) * | 2003-03-20 | 2004-10-14 | Nitto Seiko Co Ltd | Thread fastening device |
| CN101279440A (en) * | 2007-03-30 | 2008-10-08 | 本田技研工业株式会社 | Pneumatic tappet adjustment tool |
| US20090026772A1 (en) * | 2007-07-25 | 2009-01-29 | Huang Kuohsiu David | Integrative Combined Vehicle Power Allotment Mechanism |
| JP2009160709A (en) * | 2008-01-09 | 2009-07-23 | Nitto Seiko Co Ltd | Screw part fastening device |
| JP2010137294A (en) * | 2008-12-09 | 2010-06-24 | Tohnichi Mfg Co Ltd | Torque wrench |
| CN104823258A (en) * | 2013-03-08 | 2015-08-05 | 三菱电机株式会社 | Operation device for switches |
| JP2016110908A (en) * | 2014-12-09 | 2016-06-20 | 株式会社東芝 | Switchgear operation mechanism |
| CN204525310U (en) * | 2015-04-16 | 2015-08-05 | 北京劳动保障职业学院 | A kind of intelligent definite value torque wrench |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022082037A1 (en) * | 2020-10-15 | 2022-04-21 | Enerpac Tool Group Corp. | Hazard detection for torque wrench |
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|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20180831 |
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| WW01 | Invention patent application withdrawn after publication |