CN102022452A - Torque control transmission device clutch and tool system with same - Google Patents
Torque control transmission device clutch and tool system with same Download PDFInfo
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- CN102022452A CN102022452A CN2009101697498A CN200910169749A CN102022452A CN 102022452 A CN102022452 A CN 102022452A CN 2009101697498 A CN2009101697498 A CN 2009101697498A CN 200910169749 A CN200910169749 A CN 200910169749A CN 102022452 A CN102022452 A CN 102022452A
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Abstract
The present invention provides a torque control transmission device clutch used for a tool system where a drill bit is driven by an electric motor. The transmission device clutch comprises a driving shaft rotationally driven by an electric motor, a driven shaft operationally connected to the driving shaft and driven by the driving shaft, a drill bit movably connected to the driven shaft, a clutch structure which is used to selectively couple or decouple with the driving shaft and the driven shaft, and a transmission device that is operated through the pressure of a working medium. The pressure of the working medium is used to press the clutch structure to make the clutch structure engaged, thereby facilitating to transmit the torque from the driving shaft to the driven shaft. A control unit is used to control the pressure of the working medium supplied to the transmission device and the torque transmitted from the driving shaft to the driven shaft.
Description
Technical field
The tool system that the present invention relates to a kind of transmission cluthes of torque control and be provided with the transmission cluthes of this torque control.More specifically, the tool system that the present invention relates to a kind of transmission cluthes of torque control and be provided with the transmission cluthes of this torque control, wherein the transmission cluthes of this torque control utilizes pneumatic actuator or hydraulic transmission to replace pressure spring, and allows directly to import, store and use target torque value by the form of torque unit.
Background technique
In general, electric actuator is meant that the electric power that adopts motor is effectively fastening or unscrews from the portable electric tool of animal body (for example, screw).This electric actuator is to be used for that screw is fastened to the workpiece neutralization of being made by wood, metal etc. to back out a kind of the electric tool of screw from this workpiece, and this electric actuator mainly is divided into chargeable electric actuator and adopts the wired electric actuator of commercial electricity as power supply.
For screw is fastened in the workpiece, electric actuator is designed to control its driven shaft.The load that driven shaft bears equals the torque that produces when with the screw-driver tightening the screw.The clutch device that utilizes the compressive force control of spring to be fastened to the torque of the screw on the workpiece is generally used in the electric actuator.
Fig. 1 illustrates the structure by the conventional clutch of the compressive force controlling torque of utilizing spring.Now with reference to structure and the operation of Fig. 1 description based on the conventional clutch of spring.
In conventional clutch 30, the clutch piece 31 of driving shaft 10 is operably connected on the clutch piece 32 of driven shaft 20 by cam.The clutch piece 32 of driven shaft 20 is coupled on the clutch piece 31 of driving shaft 10 by the compressive force of the spring 41 of spring equipment 40.The spring 41 of the clutch piece 31 of driving shaft 10, the clutch piece 32 of driven shaft 20 and spring equipment 40 rotates together.
In this, if the load that driven shaft 20 bears less than the compressive force of spring 41, the clutch piece 31 of clutch 30 and 32 keeps engagements so.But, if the load that driven shaft 20 bears greater than the compressive force of spring 41, so clutch piece 31 and 32 go each other the engagement.
As mentioned above, typical method for controlling torque is in the motor driving fastened tools, axially installs for one in the clutch piece 31 and 32 of clutch 30, and another is pressed on mounted that clutch piece by the compressive force of utilizing spring 41.At this moment, the engaging force of clutch 30 is by the decision of the compressive force of spring 41, otherwise, by tightening or unscrewing the compressive force that the nut type spring bracket comes Regulation spring 41.
For the clutch of the compressive force of utilizing spring 41, can't calculate the compressive force of spring 41 and the torque of driven shaft 20.In this clutch,, need to change the compressive force of spring 41 in order to obtain the torque of appointment.In other words, need carry out complicated task, promptly change the compressive force of spring 41 step by step and by utilizing the torque meter (not shown) to measure torque corresponding to the compressive force that changes.
More specifically, if attempt to change current torque, will be when tightening repeatedly and unscrew the nut of support spring 41 compressive force of Regulation spring 41.During this process, measure the power that rotating nut needs by torque meter, required torque is set thus.Therefore, in order to regulate torque, must be by tightening or unscrewing the compressive force of nut Regulation spring 41 and use torque meter in the torque adjustment process.This causes the torque adjustment process to become to expend time in and can not be provided with the validity that increases the problem of required torque.
In addition, when torque was regulated in the description above pressing, operator need progressively change and be provided with the compressive force of spring 41 when holding torque meter.Therefore, when using two or more different torque fastening screws if desired, this makes operator will use two or more electric actuators usually, sets in advance in these electric actuators to be different torques.There is the problem that needs to prepare a plurality of fastened tools in this.
Summary of the invention
In view of the intrinsic above-mentioned and other problem of prior art, the tool system that the purpose of this invention is to provide a kind of transmission cluthes of torque control and be provided with the transmission cluthes of torque control, wherein the transmission cluthes of this torque control makes the user directly import, to store and to use target torque value by the form of torque unit, and makes the user that target torque value can easily be set.
One aspect of the present invention provides a kind of transmission cluthes of the torque control of using in the tool system with the motor rotary drill bit, comprising: driving shaft is driven rotationally by motor; Driven shaft is operably connected on the driving shaft and by driving shaft and rotates, and drill bit is connected on the driven shaft removedly; Clutch configuration is used for optionally being coupled and decoupling driving shaft and driven shaft; And transmission device, to operate by the pressure of working medium, the pressure of described working medium is used to push clutch configuration makes its engagement, so that torque can be delivered to driven shaft from driving shaft.
In the transmission cluthes of torque control, clutch configuration comprises first clutch piece that is installed on the driving shaft and second clutch piece that is installed on the driven shaft, transmission device is designed to, when working medium supplied to transmission device, described transmission device pressed against second clutch piece on first clutch piece.
In the transmission cluthes of torque control, transmission device comprises: cylinder is used to hold working medium; Piston is arranged in the cylinder slidably, and described piston pushes second clutch piece when stretching out; And bearing, be arranged between the piston and second clutch piece.
Another aspect of the present invention provides a kind of tool system, comprise: tool unit, the transmission cluthes that comprises the motor that is used for rotary drill bit and the pressure engagement by working medium and go to mesh, described transmission cluthes is used to make drill bit and motor to be operably connected and separates; Control unit is used to control the pressure of the working medium that supplies to transmission cluthes and stops motor when transmission cluthes goes to mesh; And the working medium source, be used for working medium is supplied to transmission cluthes.
In tool system, transmission cluthes comprises: driving shaft is driven rotationally by motor; Driven shaft is operably connected on the driving shaft and by driving shaft and rotates, and drill bit is connected on the driven shaft removedly; Clutch configuration is used for optionally being coupled and decoupling driving shaft and driven shaft; And transmission device, to operate by the pressure of working medium, the pressure of described working medium is used to push clutch configuration makes its engagement, so that torque can be delivered to driven shaft from driving shaft.
Tool system can further comprise: pressure regulator by control unit control, is used to regulate the pressure of the working medium that supplies to transmission device; And sensor, be used to detect clutch configuration and break away from generation electrical signal when meshing.
In tool system, control unit is designed to pilot pressure regulator in the following manner, that is, make the pressure of the working medium that supplies to transmission device corresponding with the torque value in being pre-stored in control unit.
In tool system, control unit is designed to the electrical signal of response sensor generation and stops motor.
In tool system, clutch configuration comprises first clutch piece that is installed on the driving shaft and second clutch piece that is installed on the driven shaft, transmission device is designed to, and when working medium supplied to transmission device, described transmission device pressed against second clutch piece on first clutch piece.
In tool system, transmission device comprises: cylinder is used to hold working medium; Piston is arranged in the cylinder slidably, and described piston pushes second clutch piece when stretching out; And bearing, be arranged between the piston and second clutch piece.
According to the present invention, pneumatic actuator that employing combines with clutch configuration or hydraulic transmission make and are easy to be provided with subtly the torque that is delivered to driven shaft from driving shaft.In addition, can preset and store a plurality of required torque values, therefore not need to use torque meter by the form of torque unit.
Description of drawings
From the description of the preferred embodiment that provides below in conjunction with accompanying drawing, above and other objects of the present invention and feature will become obviously, in the accompanying drawing:
Fig. 1 illustrates the structure of the conventional clutch of the compressive force controlling torque of utilizing spring;
Fig. 2 is the view of the structure of schematically illustrated tool system according to an embodiment of the invention;
Fig. 3 is the block diagram of this tool system of the diagram transmission cluthes that is provided with torque control according to an embodiment of the invention;
Fig. 4 is the view that the transmission cluthes of the control of torque according to an embodiment of the invention is shown;
Fig. 5 A, Fig. 5 B and Fig. 5 C are the explanatory drawings of operation that illustrates the transmission cluthes of torque according to an embodiment of the invention control.
Fig. 6 is the perspective view that is illustrated in the cable plug that adopts in this tool system.
Embodiment
Describe the preferred embodiments of the present invention in detail now with reference to accompanying drawing.
Fig. 2 is the view of the structure of schematically illustrated tool system according to an embodiment of the invention.Fig. 3 is the block diagram of this tool system of the diagram transmission cluthes that is provided with torque control according to an embodiment of the invention.With reference to Fig. 2 and Fig. 3, tool system 100 according to the present invention comprises: as the tool unit 200 of analog line driver; The control unit 300 that is used for controlling tool unit 200; And be used to make tool unit 200 and control unit 300 interconnected cables 400.Unlike the prior art, this tool system 100 can be controlled meticulous and exactly screw is fastened to torque used on the workpiece.
Under the control of control unit 300, electric energy and air pressure or hydraulic pressure supply to the tool unit 200 by cable 400 from power supply and working medium source.
Now major character of the present invention will be described in more detail.Fig. 4 is the view that the transmission cluthes of the control of torque according to an embodiment of the invention is shown.Fig. 5 A, Fig. 5 B and Fig. 5 C are the explanatory drawings of operating method that illustrates the transmission cluthes of torque according to an embodiment of the invention control.
With reference to Fig. 2, Fig. 3 and Fig. 4, transmission cluthes 240 comprises according to an embodiment of the invention: driving shaft 241 is driven rotationally by motor 220; Driven shaft 242 is operably connected on the driving shaft 241 and by driving shaft 241 and rotates, and drill bit is connected on the driven shaft 241 removedly; Clutch configuration 243 is used for optionally being coupled and decoupling driving shaft 241 and driven shaft 242; And transmission device 244, operate by the pressure of working medium, be used to push clutch configuration 243 and make its engagement, so that torque can be delivered to driven shaft 242 from driving shaft 241.Control unit 300 controls supply to the pressure of the working medium in the transmission device 244 and are delivered to the torque of driven shaft 242 from driving shaft 241.
Pressurized gas or compressed liquid supply to transmission device 244 from the working medium source, make that transmission device 244 can drive clutch structure 243.Although in the present embodiment with air pressure or hydraulic operation transmission device 244, the pressure of other kind is such as electromagnetic force etc., as long as they can make transmission device 244 drive clutch structures 243 just can adopt.
The transmission cluthes 240 of present embodiment further comprises pressure regulator 246 (see figure 3)s, and described pressure regulator 246 is used to regulate that the working medium source supplies with such as the pressure of the working medium of air or liquid.This feasible pressure that can regulate the working medium that supplies to transmission device 244 subtly, accurately transmission cluthes 240 torque transmitted are passed through in control thus.Although not shown in the accompanying drawings, pressure regulator 246 is formed by automatically controlled pressure regulator valve well known in the art.
The operation of structure of drive device clutch 240 is described with reference to Fig. 5 A to Fig. 5 C below.
If working medium supplies in the transmission device 244 by import/export 244d, the second clutch piece 243b just is pushed on the first clutch piece 243a, and therefore, shown in Fig. 5 A, clutch configuration 243 keeps couple state.If be applied to load on the driven shaft 242 less than the pressure in the cylinder 244a that acts on transmission device 244, the first clutch piece 243a and the second clutch piece 243b keep being engaged with each other so.
Otherwise if the load that is applied on the driven shaft 242 becomes greater than the pressure that acts in the cylinder 244a, the second clutch piece 243b will move away from the first clutch piece 243a.Therefore, shown in Fig. 5 B, the first clutch piece 243a and the second clutch piece 243b go engagement each other.Under this state, shown in Fig. 5 C, if the load that is applied on the driven shaft 242 becomes less than the pressure that acts in the cylinder 244a, the first clutch piece 243a and the second clutch piece 243b become and are engaged with each other so.
Shown in Fig. 5 B, go moment of meshing each other at the first clutch piece 243a and the second clutch piece 243b, sensor 250 detects the displacement of the second clutch piece 243b and produces electrical signal corresponding with it.Respond this electrical signal, control unit 300 makes motor 220 outages, and driving shaft 241 and driven shaft 242 are stopped operating.This makes operator can have the torque thread of tool unit 200 to preset of the transmission cluthes 240 of torque control by use.Can also supply to the pressure of the working medium in the cylinder 244a of transmission device 244 by adjusting, the torque of control driven shaft 242, that is, and clutch configuration 243 remove engaging force.Although sensor 250 is used to detect the motion of second clutch 243b in the present embodiment, available other equivalent detector replaces sensor 250.
Under the control of control unit 300, act on the pressure among the cylinder 244a, that is, the pressure that supplies to the working medium among the cylinder 244a of transmission device 244 by import/export 244d is adjusted to desirable value subtly by pressure regulator 246.Therefore, can simply and accurately control by clutch configuration 243 torque transmitted.
In the present embodiment, control unit 300 is designed to pilot pressure regulator 246 in the following manner, that is, and and with corresponding to the pressure feed transmission device 244 that is pre-stored in the torque value in the control unit 300.Therefore, when the load that is applied to clutch configuration 243 reached the torque value of prestor, clutch configuration 243 went engagement.In response, sensor 250 is presented the electrical signal that meshes of going that shows clutch configuration 243 to control unit 300, and control unit 300 can make motor 220 outages and driving shaft 241 and driven shaft 242 are stopped operating thus.In this, unless operator change the torque value of prestor in the control unit 300, the pressure that acts in the transmission device 244 remains unchanged.
When the sensor 250 of operation tool unit 200, the electrical signal of continuous activation promptly, rotates trigger signal and is input in the control unit 300, control unit 300 then make motor 220 drive driven shaft 242 rotationally.When the second clutch piece 243b left the first clutch piece 243a, the interim pulse signal that activates promptly rotated stop signal and is input in the control unit 300, control unit 300 then make motor 220 stop the rotation of driven shaft 242.As to rotating trigger signal or rotating the response of stop signal, control unit 300 makes the pressure feeds corresponding with the torque value of prestor to transmission device 244, drives rotationally thus or stops driven shaft 242.
The electrically-controlled valve of pressure regulator 246 is by microprocessor 310 controls of control unit 300.Torque value is directly imported and is stored in the control unit 300 by the form of torque unit by operator.
For example, a plurality of torque values are directly keyed in and are stored in the control unit 300 by the user.Microprocessor 310 is presented and the corresponding pressure signal of one of them torque value to pressure regulator 246.Therefore, in check pressure feed is to transmission device, thus the engagement of solenoidoperated cluthes structure 243 and go engagement.In this, microprocessor 310 can receive the input signal that is used to regulate pressure with the numerical value form.With can change with the type of clutch configuration through the corresponding output torque of the pressure that overregulates, and can decide with the kind of the fastening task of screw (for example, connecting the work or the work that is flexible coupling firmly).Control unit 300 can revise output in the torque variation and with the deviant control output torque of appointment.In other words, no matter want different on shape, speed and kind of fastening object, the transmission device 240 of present embodiment can obtain essentially identical torque value.Control unit 300 disposes the software of programming in advance, so that (in other words according to the variation of wanting different on shape, rotational velocity and kind of fastening object can revise the output torque, so that supplying to the pressure of transmission device 244 can automatically be calculated and be revised), thus rotate driven shaft 242 with in check torque.
Utilize the present invention as indicated above, the pressure by regulating the working medium supply to transmission device 244 subtly is the engaging force of solenoidoperated cluthes structure 243 accurately.By microprocessor 310 adjusting of the pressure of execution work medium in real time.Coherence between the pressure by the analytical work medium and the output torque of driven shaft 242 is provided with torque value with the numerical value form, and this torque value is outputed to control unit 300 (microprocessor 310), thus the torque that produces in the controlling tool unit 200.This does not just need to use single torque meter, otherwise needs to use this torque meter that required torque is set.Diverse location and user that the input torque value can be stored in control unit 300 can select described input torque value by many different modes.
Adopt the front-end control panel 332 of operation and display unit 330 and seven section 333, can be with required torque value input microprocessor 310 under the help of software, this torque value is used to control the pressure of the working medium that supplies to transmission device 244.Control unit 300 can with personal computer (PC) 510 and programmable logic controller (PLC) (PLC) 520 joint operations.The operation of control unit 300 can be by monitoring unit 530 monitoring.
As mentioned above, tool system 100 of the present invention comprises: tool unit (screw-driver) 200 is provided with motor 220; Control unit 300 is used to control the power supply of motor and the pressure of working medium, so that rotate driven shaft 242 with in check torque; And cable 400, by cable 400 supplying electric currents and working medium.In the present invention, transmission device 244 can be to adopt air as the pneumatic actuator of working medium or adopt liquid any as in the hydraulic transmission of working medium.
Although control unit 300 and tool unit 200 are individually formed in the above-described embodiments, control unit 300 also can be formed in the tool unit 200, so that control unit 300 can be used as the control unit of the transmission cluthes 240 of tool unit 200.Perhaps, can use the transmission cluthes 240 of control unit 300 controlling tool unit 200 separately.
Fig. 6 is the perspective view that is illustrated in the cable plug that adopts in this tool system.As shown in Figure 6, by cable 400 control unit 300 and driver 200 are connected to each other.Cable 400 has for being connected custom-designed joint 410 simultaneously with power supply and working medium source.In other words, joint 410 is provided with power plug 411 and working medium plug 412, makes to adopt single joint supply power and working medium simultaneously.
Aforesaid tool system of the present invention has following beneficial effect.Tool system adopts pneumatic efficiently or fluid power motor, described pneumatic or fluid power motor have the life-span long, noise is low, the heat that produces is low and the advantage of light weight.This helps to alleviate the tired of user and increase work efficiency.Tool system is provided with value ground and the required torque that is stored in the internal memory is easy to change.Tool system can also be made by the mode of saving cost.Tool system has fastening quality monitoring function and tally function and can be with different error code display abnormality operations.Tool system has by the ability of COM1 (for example, RS-232C port) and external device communication and makes the user to monitor fastening information by utilizing personal computer.In addition, tool system can make the user that parameter can be set and the maintenance interval information of single part is provided.
In addition, by directly sensor or switch being connected to the torque selection terminal that is located at control unit 300, can select one of them to select torque value memory location.If tool system and programmable logic controller (PLC) 520 are united use, the torque value memory location can directly be selected and use to programmable logic controller (PLC) 520 so.Also can realize distant control function by using parallel I/O port.
In addition, tool system of the present invention has tally function and other correlation function.Utilize above-mentioned tool system 100, can on light-emitting diode indicator, be provided with and show the fastening sum of screw (comprising remaining screw number).Can also determine and show to occur in unusual in the fastening process of screw.In addition, can select input and output to begin the method for count signal and end count signal.If necessary, tool system can be united use with two or more control apparatuss.The operation of tool system can be monitored in real time by using personal computer.The content of mistake and required time can be presented on the personal computer and by the user and coordinate in the fastening screw.Can also in personal computer, pass through the operation of the port monitoring tools unit 200 of use control unit 300.
Only purpose of illustration proposes embodiment mentioned above, therefore, the invention is not restricted to the foregoing description.It should be appreciated by those skilled in the art, under the situation that does not exceed the scope of the present invention that is defined by the claims, can carry out various modification and improvement the present invention.
Claims (12)
1. the transmission cluthes of a torque control is applied to the tool system with the motor rotary drill bit, and the transmission cluthes of described torque control comprises:
Driving shaft is driven rotationally by described motor;
Driven shaft is operably connected on the described driving shaft and by described driving shaft and rotates, and described drill bit is connected on the described driven shaft removedly;
Clutch configuration is used for optionally being coupled and described driving shaft of decoupling and described driven shaft; And
Transmission device is operated by the pressure of working medium, and the pressure of described working medium is used to push described clutch configuration makes its engagement, so that torque can be delivered to described driven shaft from described driving shaft.
2. the transmission cluthes of torque control as claimed in claim 1, wherein, described clutch configuration comprises first clutch piece that is installed on the described driving shaft and second clutch piece that is installed on the described driven shaft, described transmission device is designed to, when described working medium supplied to described transmission device, described transmission device pressed against described second clutch piece on described first clutch piece.
3. the transmission cluthes of torque control as claimed in claim 2, wherein, described transmission device comprises: cylinder is used to hold described working medium; Piston is arranged in the described cylinder slidably, and described piston pushes described second clutch piece when stretching out; And bearing is arranged between described piston and described second clutch piece.
4. tool system comprises:
Tool unit, the transmission cluthes that comprises the motor that is used for rotary drill bit and the pressure engagement by working medium and go to mesh, described transmission cluthes is used to make described drill bit to be operably connected with described motor and separates;
Control unit is used to control the described pressure of the described working medium that supplies to described transmission cluthes and stops described motor when described transmission cluthes goes to mesh; And
The working medium source is used for described working medium is supplied to described transmission cluthes.
5. tool system as claimed in claim 4, wherein, described transmission cluthes comprises:
Driving shaft is driven rotationally by described motor;
Driven shaft is operably connected on the described driving shaft and by described driving shaft and rotates, and described drill bit is connected on the described driven shaft removedly;
Clutch configuration is used for optionally being coupled and described driving shaft of decoupling and described driven shaft; And
Transmission device is operated by the described pressure of described working medium, and the described pressure of described working medium is used to push described clutch configuration makes its engagement, so that torque can be delivered to described driven shaft from described driving shaft.
6. tool system as claimed in claim 4 further comprises: pressure regulator by described control unit control, is used to regulate the described pressure of the described working medium that supplies to described transmission device; And sensor is used to detect the engagement of going of described clutch configuration, to produce electrical signal.
7. tool system as claimed in claim 6, wherein, described control unit is designed to control in the following manner described pressure regulator, that is, the described pressure of described working medium that supplies to described transmission device is corresponding with the torque value in being pre-stored in described control unit.
8. tool system as claimed in claim 6, wherein, described control unit is designed to respond the electrical signal of described sensor generation and stops described motor.
9. tool system as claimed in claim 5, wherein, described clutch configuration comprises first clutch piece that is installed on the described driving shaft and second clutch piece that is installed on the described driven shaft, described transmission device is designed to, when described working medium supplied to described transmission device, described transmission device pressed against described second clutch piece on described first clutch piece.
10. tool system as claimed in claim 6, wherein, described clutch configuration comprises first clutch piece that is installed on the described driving shaft and second clutch piece that is installed on the described driven shaft, described transmission device is designed to, when described working medium supplied to described transmission device, described transmission device pressed against described second clutch piece on described first clutch piece.
11. tool system as claimed in claim 9, wherein, described transmission device comprises: cylinder is used to hold described working medium; Piston is arranged in the described cylinder slidably, and described piston pushes described second clutch piece when stretching out; And bearing is arranged between described piston and described second clutch piece.
12. tool system as claimed in claim 10, wherein, described transmission device comprises: cylinder is used to hold described working medium; Piston is arranged in the described cylinder slidably, and described piston pushes described second clutch piece when stretching out; And bearing is arranged between described piston and described second clutch piece.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101697498A CN102022452A (en) | 2009-08-31 | 2009-08-31 | Torque control transmission device clutch and tool system with same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101697498A CN102022452A (en) | 2009-08-31 | 2009-08-31 | Torque control transmission device clutch and tool system with same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102022452A true CN102022452A (en) | 2011-04-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009101697498A Pending CN102022452A (en) | 2009-08-31 | 2009-08-31 | Torque control transmission device clutch and tool system with same |
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| Country | Link |
|---|---|
| CN (1) | CN102022452A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103862415A (en) * | 2012-12-14 | 2014-06-18 | 吴坤哲 | Method and device for torsion control, modules and electric wrench |
| CN112610461A (en) * | 2020-12-09 | 2021-04-06 | 嘉善边锋机械股份有限公司 | Electric diaphragm pump with self-protection function |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3807539A (en) * | 1971-08-12 | 1974-04-30 | J Reed | Torque limiting devices |
| US4418765A (en) * | 1981-01-16 | 1983-12-06 | Matsushita Electric Industrial Company, Limited | Power-driven screwdriver with a torque control |
| CN2192761Y (en) * | 1994-05-05 | 1995-03-22 | 大庆石油管理局钻井二公司 | Double-cylinder pneumatic tooth inlaid clutch for controlling winch of drilling machine |
| CN2378157Y (en) * | 1999-04-18 | 2000-05-17 | 吕松林 | Intelligent combined tool for fastening |
| US20090139822A1 (en) * | 2007-11-30 | 2009-06-04 | Sehan Electools., Ltd | Torque-controlling actuator clutch and tool system having the same |
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2009
- 2009-08-31 CN CN2009101697498A patent/CN102022452A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3807539A (en) * | 1971-08-12 | 1974-04-30 | J Reed | Torque limiting devices |
| US4418765A (en) * | 1981-01-16 | 1983-12-06 | Matsushita Electric Industrial Company, Limited | Power-driven screwdriver with a torque control |
| CN2192761Y (en) * | 1994-05-05 | 1995-03-22 | 大庆石油管理局钻井二公司 | Double-cylinder pneumatic tooth inlaid clutch for controlling winch of drilling machine |
| CN2378157Y (en) * | 1999-04-18 | 2000-05-17 | 吕松林 | Intelligent combined tool for fastening |
| US20090139822A1 (en) * | 2007-11-30 | 2009-06-04 | Sehan Electools., Ltd | Torque-controlling actuator clutch and tool system having the same |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103862415A (en) * | 2012-12-14 | 2014-06-18 | 吴坤哲 | Method and device for torsion control, modules and electric wrench |
| CN103862415B (en) * | 2012-12-14 | 2016-01-13 | 吴坤哲 | Torsion control method, device, module and electric wrench |
| CN112610461A (en) * | 2020-12-09 | 2021-04-06 | 嘉善边锋机械股份有限公司 | Electric diaphragm pump with self-protection function |
| CN112610461B (en) * | 2020-12-09 | 2023-08-25 | 嘉善边锋机械股份有限公司 | Electric diaphragm pump with self-protection function |
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