CN203685914U - Torque limiter for electric tool - Google Patents
Torque limiter for electric tool Download PDFInfo
- Publication number
- CN203685914U CN203685914U CN201320689123.1U CN201320689123U CN203685914U CN 203685914 U CN203685914 U CN 203685914U CN 201320689123 U CN201320689123 U CN 201320689123U CN 203685914 U CN203685914 U CN 203685914U
- Authority
- CN
- China
- Prior art keywords
- rotor
- torque limiter
- electric tool
- ball
- transmission
- 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.)
- Expired - Lifetime
Links
- 230000005540 biological transmission Effects 0.000 claims abstract description 50
- 230000000694 effects Effects 0.000 claims description 5
- 238000000926 separation method Methods 0.000 abstract 1
- 230000008859 change Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000003116 impacting effect Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
Images
Landscapes
- One-Way And Automatic Clutches, And Combinations Of Different Clutches (AREA)
Abstract
The utility model discloses a torque limiter for an electric tool and solves the technical problem that the conventional torque limiter is not stable enough during separation under overloaded torque. The torque limiter comprises a first rotator and a second rotator; the first rotator sleeves the second rotator. The torque limiter is characterized in that the joint of the first rotator and the second rotator is provided with a transmission ball; the inner side face of the first rotator is provided with a ball groove; the outer side face of the second rotator is provided with a transmission toothed groove; the transmission ball is movably assembled between the groove and the transmission toothed groove; the torque limiter also comprises an elastic pressing device which radially presses the transmission ball inwards.
Description
[technical field]
The utility model relates to torque limiter.
[background technique]
Normally a kind of parts that play transmitting torque between active machine and working machine that are connected in of torque limiter, major function is torque overload protection.While causing required torque to exceed setting value when overload or mechanical failure, it,, with the form limiting drive train that the skids torsion being transmitted of uniting, recovers voluntarily to connect after overload condition disappears.So just prevent mechanical failure, avoided expensive shutdown loss.
Torque limiter in existing hand held electric tool more difficult manipulation on torsion regulates in the market, structural rigidity is larger, stable not in the time departing from moment of torsion, and torsion increase causes a hidden trouble to operator and motor.
[model utility content]
The utility model provides a kind of torque limiter of electric tool for overcoming the drawback of prior art, under overload situations, moment of torsion detaching structure is stable, thus protection user and electric tool.
For solving the problems of the technologies described above, the utility model adopts following technological scheme:
The torque limiter of electric tool, comprise the first rotor and the second rotor, described the first rotor is sleeved on the second rotor, it is characterized in that: the junction point of the first rotor and the second rotor is provided with transmission ball, the inner side surface of described the first rotor is provided with ball grooves, the outer side surface of described the second rotor is provided with transmission teeth groove, the activity of described transmission ball is assemblied between groove and transmission teeth groove, and described torque limiter also comprises the elastic pressuring clamping device that radially inwardly compresses transmission ball.
Further, described elastic pressuring clamping device comprises pressing plate and elastic element, and described pressing plate flip sleeve is contained on described the second rotor, and described elastic element forces on described pressing plate, and described pressing plate end face is near described transmission ball.
Further, all sides of described pressing plate end face are provided with the sloping platform of axial protrusion, and described sloping platform is near described transmission ball.
Further, described elastic pressuring clamping device also comprises the adjustment member of adjustable elastic element elastic force.
Further, described adjustment member comprises the adjusting nut being arranged on described the second rotor.
Further, described elastic element is stage clip or dish spring.
Further, the degree of depth of described ball grooves is greater than the diameter of described transmission ball, and the degree of depth of described transmission teeth groove is less than the diameter of described transmission ball.
Further, described the first rotor connects the power input shaft of electric tool, and described the second rotor connects the pto＝power take-off of electric tool.
The beneficial effects of the utility model:
Torque limiter of the present utility model adopts Ball Transmission mode; in the time that torsion reaches overload moment of torsion; the second rotor approaches and stops; transmission ball is subject to the extruding of ball grooves sidewall; until overcome the impacting force of elastic pressuring clamping device, make that transmission ball is whole to be slipped in ball grooves, the first rotor continues rotation; the second rotor stops operating, thereby reaches the object of torque overload protection.Compared to existing technology, roll structure of the present utility model is fairly simple, can make stable disengagement between two rotors under overload situations, thus protection user and electric tool.
These features of the present utility model and advantage will be below embodiment, accompanying drawing in detailed exposure.
[accompanying drawing explanation]
Below in conjunction with accompanying drawing, the utility model is described further:
Fig. 1 is the generalized section of torque limiter in the utility model preferred embodiment;
Fig. 2 is the structural representation of torque limiter under electric tool normal working in the utility model preferred embodiment;
Fig. 3 is the structural representation of torque limiter under electric tool overload in the utility model preferred embodiment.
[embodiment]
Accompanying drawing below in conjunction with the utility model embodiment is explained and illustrated the utility model embodiment's technological scheme, but following embodiment is only preferred embodiment of the present utility model, not all.Based on the embodiment in mode of execution, those skilled in the art are other embodiments that obtains under the prerequisite of not making creative work, all belong to protection domain of the present utility model.
With reference to Fig. 1, the torque limiter of electric tool of the present utility model, comprise the first rotor and the second rotor, common, in electric tool, the first rotor connects the power input shaft of electric tool, the second rotor connects the pto＝power take-off of electric tool, and being connected between the first rotor and the second rotor, in fact plays the effect of coupling, for the moment of torsion of transferring power input shaft is delivered to pto＝power take-off, thereby realize the rotation of electric tool workpiece.
With reference to Fig. 2, in the present embodiment, the first rotor is sleeved on the second rotor, the junction point of the first rotor and the second rotor is provided with transmission ball, and on the inner side surface of the first rotor, circumferentially compartment of terrain is provided with ball grooves, and on the outer side surface of the second rotor, circumferentially compartment of terrain is provided with transmission teeth groove, the activity of transmission ball is assemblied between groove and transmission teeth groove, when practice, the degree of depth of ball grooves is greater than the diameter of transmission ball, and the degree of depth of transmission teeth groove is less than the diameter of transmission ball.Under normal working, when the first rotor rotation, drive the second rotor rotation, transmitting torque by roller; The present embodiment is also provided with elastic pressuring clamping device on the second rotor, elastic pressuring clamping device radially inwardly compresses transmission ball, when guaranteeing to work under normal torque condition, transmission ball can not depart from transmission teeth groove, so that the first rotor and the steady transmission of the second rotor.
When concrete utilization, elastic pressuring clamping device comprises pressing plate and elastic element, and pressing plate flip sleeve is contained on the second rotor, and elastic element forces on pressing plate, makes pressing plate end face near transmission ball.For reaching good compression effect, all sides of pressing plate end face are provided with the sloping platform of axial protrusion, sloping platform is near transmission ball, a part of end thrust of utilizing sloping platform that elastic element is forced on pressing plate is converted to radial thrust, can prevent that transmission ball from deviating from, again can be to radially inwardly compressing transmission ball, guarantee the steady transmission between the first rotor and the second rotor, after overload condition disappears, by the extruding of sloping platform on pressing plate, make transmission ball self-resetting simultaneously.
With reference to Fig. 3, in the present embodiment, in the time there is overload or mechanical failure, transmission ball is subject to the extruding of ball grooves sidewall, makes transmission ball overcome platen pressure and progressively move to ball grooves, until transmission ball integrated moving is in ball grooves, throw off with transmission teeth groove, now, the first rotor continues rotation, the second rotor stops operating, thereby has protected the parts such as motor; And the scheme of employing the present embodiment, can be at short notice by the first rotor and the second rotor stable disengagement, the moment of torsion of avoiding user to transmit because of overload feels to operate uncomfortable feeling, improves the product safety performance of electric tool.
In the process moving to ball grooves due to transmission ball, need to overcome platen pressure, can force in the active force on pressing plate by adjustable elastic element, reach the object of adjusting overload moment of torsion.For this reason, the elastic pressuring clamping device of the present embodiment also comprises the adjustment member of adjustable elastic element elastic force, concrete, adjustment member is mounted in the adjusting nut on the second rotor, rotation adjusting nut can adjustable elastic element pre compressed magnitude, thereby change elastic element and force in the active force on pressing plate, also be just equal to change platen pressure, platen pressure is larger, overload moment of torsion is larger, platen pressure is less, and overload moment of torsion is less, and user can select suitable overload moment of torsion according to actual operand.
Above-mentioned elastic element includes but not limited to stage clip or dish spring, and in addition, for overload moment of torsion, those skilled in the art are also referred to as " safe torque ", " setting moment of torsion ", " disengaging moment of torsion " etc., in fact all belong to same class and explain.
The utility model embodiment is applied to hand held electric tool, for example hand held electric drill, hand-held electric saw.
By above-described embodiment, the purpose of this utility model is by fully effective having reached.The personage who is familiar with this skill should be understood that the utility model includes but not limited to accompanying drawing and the content of describing in embodiment above.Any modification that does not depart from function and structure principle of the present utility model all will be included in the scope of claims.
Claims (8)
1. the torque limiter of electric tool, comprise the first rotor and the second rotor, described the first rotor is sleeved on the second rotor, it is characterized in that: the junction point of the first rotor and the second rotor is provided with transmission ball, the inner side surface of described the first rotor is provided with ball grooves, the outer side surface of described the second rotor is provided with transmission teeth groove, the activity of described transmission ball is assemblied between groove and transmission teeth groove, and described torque limiter also comprises the elastic pressuring clamping device that radially inwardly compresses transmission ball.
2. the torque limiter of electric tool as claimed in claim 1, it is characterized in that: described elastic pressuring clamping device comprises pressing plate and elastic element, described pressing plate flip sleeve is contained on described the second rotor, described elastic element forces on described pressing plate, and described pressing plate end face is near described transmission ball.
3. the torque limiter of electric tool as claimed in claim 2, is characterized in that: all sides of described pressing plate end face are provided with the sloping platform of axial protrusion, and described sloping platform is near described transmission ball.
4. the torque limiter of electric tool as claimed in claim 2, is characterized in that: described elastic pressuring clamping device also comprises the adjustment member of adjustable elastic element elastic force.
5. the torque limiter of electric tool as claimed in claim 4, is characterized in that: described adjustment member comprises the adjusting nut being arranged on described the second rotor.
6. the torque limiter of the electric tool as described in one of claim 2 to 5, is characterized in that: described elastic element is stage clip or dish spring.
7. the torque limiter of the electric tool as described in one of claim 1 to 5, is characterized in that: the degree of depth of described ball grooves is greater than the diameter of described transmission ball, and the degree of depth of described transmission teeth groove is less than the diameter of described transmission ball.
8. the torque limiter of the electric tool as described in one of claim 1 to 5, is characterized in that: described the first rotor connects the power input shaft of electric tool, and described the second rotor connects the pto＝power take-off of electric tool.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320689123.1U CN203685914U (en) | 2013-11-04 | 2013-11-04 | Torque limiter for electric tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320689123.1U CN203685914U (en) | 2013-11-04 | 2013-11-04 | Torque limiter for electric tool |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203685914U true CN203685914U (en) | 2014-07-02 |
Family
ID=51007821
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320689123.1U Expired - Lifetime CN203685914U (en) | 2013-11-04 | 2013-11-04 | Torque limiter for electric tool |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203685914U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109058314A (en) * | 2018-09-30 | 2018-12-21 | 乔坤 | A kind of torque limiter, intelligent switch door drive mechanism and household electrical appliance |
| CN110107616A (en) * | 2019-04-26 | 2019-08-09 | 江苏泰克曼传动设备有限公司 | A kind of limiter of moment for overload protection |
| CN110338880A (en) * | 2019-07-18 | 2019-10-18 | 中国人民解放军东部战区总医院 | Reparation tooling for articular cartilage damage |
| US10738836B2 (en) | 2016-11-30 | 2020-08-11 | Saint-Gobain Performance Plastics Rencol Limited | Adjustable torque assembly |
-
2013
- 2013-11-04 CN CN201320689123.1U patent/CN203685914U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10738836B2 (en) | 2016-11-30 | 2020-08-11 | Saint-Gobain Performance Plastics Rencol Limited | Adjustable torque assembly |
| CN109058314A (en) * | 2018-09-30 | 2018-12-21 | 乔坤 | A kind of torque limiter, intelligent switch door drive mechanism and household electrical appliance |
| CN110107616A (en) * | 2019-04-26 | 2019-08-09 | 江苏泰克曼传动设备有限公司 | A kind of limiter of moment for overload protection |
| CN110338880A (en) * | 2019-07-18 | 2019-10-18 | 中国人民解放军东部战区总医院 | Reparation tooling for articular cartilage damage |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN203685914U (en) | Torque limiter for electric tool | |
| CN203968587U (en) | With the hand-held mini-size tillage machine of dog clutch | |
| WO2005023493A3 (en) | Screwdriver with adjustable torque limiting clutch | |
| CN200989274Y (en) | Motorcycle engine starting torque overload protector | |
| CN102619895B (en) | Normally-open clutch of micro-cultivator | |
| CN202108895U (en) | Elastic coupler of safety pin | |
| CN105485196A (en) | Torque limiter provided with gear friction plates | |
| CN104533988A (en) | Plane friction torque limiting clutch | |
| EP2623046B1 (en) | Drill head locking apparatus and drill head | |
| CN204716802U (en) | A kind of anti-torque overload coupling | |
| CN202381586U (en) | End face dog type safety clutch | |
| CN111878517A (en) | Bidirectional adjustment friction coupling for electric switch machine | |
| CN105065487B (en) | A kind of clutch of motorcycle | |
| CN107152468A (en) | A kind of slip clutch with overload protection | |
| CN203362877U (en) | Grass grasping machine of diaphragm spring clutch | |
| CN203477118U (en) | Coupler | |
| CN205479008U (en) | Safety clutch | |
| CN205315538U (en) | Take torque limiter of gear friction disc | |
| CN103511488A (en) | Mechanical transmission coupling structure | |
| CN204628345U (en) | With the coupling of overload protection | |
| CN204414646U (en) | The syndeton of a kind of press machine clutch brake and power transmission shaft | |
| CN211059313U (en) | Folding driving device for automatic folding screen mobile phone | |
| CN201202748Y (en) | Overload protection clutch for heavy type vehicle tray brake | |
| CN203248554U (en) | Adjustable type anti-overload coupler | |
| JP6961078B2 (en) | Torque transmission device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140702 |
|
| CX01 | Expiry of patent term |