CN1831354A - Torque limiter - Google Patents
Torque limiter Download PDFInfo
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- CN1831354A CN1831354A CN 200610001287 CN200610001287A CN1831354A CN 1831354 A CN1831354 A CN 1831354A CN 200610001287 CN200610001287 CN 200610001287 CN 200610001287 A CN200610001287 A CN 200610001287A CN 1831354 A CN1831354 A CN 1831354A
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Abstract
The torque limiter 2 is constructed such that an internal rotator 12 is rotatably incorporated in an external rotator 4, the permanent magnet 18 is assembled in one of the external rotator 4 and the internal rotator 12, for example, in the rotator 12 and a semihard magnetic member 8 facing to the permanent magnet 18 is assembled in the other rotator 4. An elastic member 22 is provided between the rotator 12 and the permanent magnet 18 as a means for assembling the permanent magnet 18 in the rotator 12. The elastic member 22 presses both the rotator 12 and the permanent magnet 18 at least in the radial direction. As a result, the permanent magnet 18 is secured to the rotator 12 due to the elastic force of the elastic member 22.
Description
Technical field
The present invention relates to utilize the torque limiter of magnetic force.
Background technique
As the torque limiter that has utilized magnetic force, having by bonding of now having known is fixed on torque limiter (for example, with reference to patent documentation 1-Japanese kokai publication hei 7-7919 communique, patent documentation 2-Japanese kokai publication hei 6-321341 communique) on the rotary component with permanent magnet.In addition, also having either party of resinous solid of rotation or permanent magnet of now having known is provided with a plurality of protuberances, make permanent magnet and resin system solid of rotation mutual when chimeric, make the front end of raised part contact the torque limiter that constitutes with either party pressure of resin system solid of rotation or permanent magnet.
This brief principle of the torque limiter of magnetic force of utilizing is: it have a pair of can counterrotating rotary component.On a rotary component, be fixed with permanent magnet, on another rotary component, be fixed with the semi-rigid magnetic.And permanent magnet disposes so that small gap is relative with the semi-rigid magnetic.By one of them rotary component input torque, by another rotary component output torque.When the load of input torque when predetermined load is following, another rotary component just rotates with the rotary component of input torque, torque limiter is given this transmission of torque another rotary component and is exported torque; When the load of input torque when predetermined load is above, the rotary component of input torque is then relative with another rotary component to be rotated, torque limiter then can not pass to input torque another rotary component and export torque.So-called " semi-rigid magnetic " is meant the material of magnetic property of the centre of the soft magnetism that has as iron and Hard Magnetic, for example siderochrome cobalt alloy, iron-nickel alloy and so on.Be characterized in, can magnetize with fewer energy and demagnetize.That is, owing to have the character that the magnetic pole that once had been magnetized by the magnetic force from the outside is reversed, thereby when being attracted by the N utmost point of permanent magnet, the semi-rigid magnetic magnetizes and is the S utmost point; When being attracted by the S utmost point of permanent magnet again, the semi-rigid magnetic that then has been magnetized to the S utmost point is reversed to the N utmost point.Torque limiter has utilized this characteristic exactly.Its action principle is roughly as follows:
(1) when the load of input torque (is example with the rotary component that permanent magnet is housed) when predetermined load is following.
At first, permanent magnet remains static, and has produced the magnetic pole opposite with the magnetic pole of permanent magnet on the semi-rigid magnetic relative with it.That is, partly produce the N utmost point at the semi-rigid magnetic relative, and partly produce the S utmost point at the semi-rigid magnetic relative with the N utmost point part of permanent magnet with the S utmost point part of permanent magnet.And, only when permanent magnet remains static, keep this state (state of Figure 13 A).
Secondly, when permanent magnet rotates (state of Figure 13 B) when some to the arrow A direction, the magnetic pole of the magnetic pole of permanent magnet and semi-rigid magnetic all produces skew.So, the S utmost point of permanent magnet and the S utmost point of semi-rigid magnetic produce mutually and repel, the N utmost point of permanent magnet and the N utmost point of semi-rigid magnetic produce mutually and repel, and make its power of leaving mutually thereby acted on, and make the semi-rigid magnetic to the direction rotation identical with the sense of rotation of above-mentioned permanent magnet.And, the S utmost point part of permanent magnet and the N utmost point part of semi-rigid magnetic, and the S utmost point part of the N utmost point of permanent magnet part and semi-rigid magnetic all is in relative stable position respectively.
Yet, because permanent magnet also will be in the direction rotation identical with above-mentioned direction, thereby, as long as permanent magnet continues rotation, the S utmost point part of permanent magnet and the N utmost point part of semi-rigid magnetic, and the S utmost point of the N utmost point of permanent magnet part and semi-rigid magnetic partly all is in relative stable position respectively, and the magnetic pole of semi-rigid magnetic all will be subjected to the pushing of the same pole of permanent magnet, and the magnetic pole of semi-rigid magnetic then rotates along with the rotation of permanent magnet.
(2) when the load of input torque (is example with the rotary component that permanent magnet is housed) when predetermined load is above.
At first, permanent magnet remains static, this and above-mentioned situation identical (state of Figure 13 A).
Secondly, when permanent magnet rotates (state of Figure 13 D) when some to the arrow A direction, to permanent magnet and the effect of semi-rigid magnetic make its power of leaving mutually, this is also same as described above.
Yet, the occasion that stops in the rotation of semi-rigid magnetic, or be applied to the occasion of load when predetermined load is above on the semi-rigid magnetic, even the S utmost point of the S utmost point of permanent magnet and semi-rigid magnetic, the N utmost point of permanent magnet and the N utmost point of semi-rigid magnetic are in the state of mutual repulsion, and the semi-rigid magnetic can be along with permanent magnet rotates really and rotates yet.Above-mentioned repulsive force exists only in inside.
And, when permanent magnet during further in the direction identical rotation with above-mentioned direction, shown in Figure 13 E, the S utmost point of permanent magnet and the S utmost point of semi-rigid magnetic, and the N utmost point of permanent magnet and the N utmost point of semi-rigid magnetic then are in relative state.In this state, the magnetic pole of semi-rigid magnetic changes, and the part of the semi-rigid magnetic extremely relative with the S of permanent magnet becomes the N utmost point from the S utmost point, and the semi-rigid magnetic part extremely relative with the N of permanent magnet becomes the S utmost point and reach stable from the N utmost point.
But this stablizing is theoretic.In fact, this steady state can not be kept.That is, because permanent magnet continues rotation, thereby in the next moment that reaches the aforementioned stable state, the magnetic pole of permanent magnet moves, and reaches next unstable state.Therefore, continue at permanent magnet under the state of rotation, though carry out above action repeatedly, permanent magnet always stands facing each other with the state that bears load mutually with the semi-rigid magnetic, and its result can not pass to the rotation of permanent magnet the semi-rigid magnetic.
For permanent magnet is fixed on the rotary component, it fixedly is the simplest that employing is pressed into, and both can reduce manufacturing process, can reduce manufacture cost again.Yet the permanent magnet that magnetic force is strong all is to form with the extremely low material forming of elasticity usually.Therefore, fixedly the time, because the pressure that is added on the permanent magnet is excessive, permanent magnet can ftracture, thereby in fact can not adopt the method that fixes rotary component and permanent magnet by being pressed into when permanent magnet being pressed in the rotary component and with both.
Prior art shown in the patent documentation 1,2 is fixed on permanent magnet on the rotary component by bonding.But this method requires high quality of fit between rotary component and the permanent magnet, and because the precision prescribed height, inevitably cost is also high.And, in manufacture process, Bond is dispersed throughout with high scarf closes between the rotary component of precision manufacturing and the permanent magnet and be not easy, this also becomes the big factors that increases cost.In addition, make Bond after between rotary component and the permanent magnet, also must place certain hour before solidifying fully, this also becomes the big factors that raises the cost.
In order to address this problem, patent documentation 3 described prior art schemes have been proposed by the application's claimant.The structure of the prior art is, with the spindle unit of resin manufacture mounting permanent magnet, in any one party formation projection of this spindle unit and permanent magnet; When forming projection on permanent magnet, chimeric by spindle unit and permanent magnet utilizes this projection by means of the resin component that cuts the opposing party both to be fixed; When forming projection on this resinous rotary component, chimeric by spindle unit and permanent magnet fixed both by means of the tip part with this projection cuts.By adopting such structure, can not adopt the method for bonding and permanent magnet is assembled on the spindle unit, thereby solve the shortcoming of above-mentioned adhesive method.
Yet we know that there is following shortcoming in the prior art.That is, as mentioned above, because the part of spindle unit is cut, thereby make these fragments that cut or smear metal remain in enclosure interior, attached to the swivel bearing part, cause the spin friction resistance to increase and instability, finally cause transmitting torque instability as torque limiter.
Summary of the invention
Purpose of the present invention just is to eliminate the above-mentioned shortcoming of prior art, and a kind of high adhesive method of cost that neither adopts is provided, do not take place again fragment or smear metal etc., can be with spindle unit and permanent magnet in conjunction with fixing torque limiter.
Torque limiter of the present invention, when relative rotation with outside solid of rotation is assembled freely with inboard solid of rotation, permanent magnet is assembled on either party solid of rotation of above-mentioned outside solid of rotation and inboard solid of rotation, semi-rigid magnetic that will be relative with above-mentioned permanent magnet is assembled on any the opposing party's the solid of rotation, it is characterized in that: the structure that permanent magnet is assembled into the mechanism on the above-mentioned solid of rotation is, make elastic material between above-mentioned solid of rotation and above-mentioned permanent magnet, utilize this elastic material with both at least to radially the extruding.
Its supplementary features are that elastic material is the annular component along the whole circumference face configuration of solid of rotation.
Torque limiter of the present invention, when relative rotation with outside solid of rotation is assembled freely with inboard solid of rotation, permanent magnet is assembled on either party solid of rotation of above-mentioned outside solid of rotation and inboard solid of rotation, semi-rigid magnetic that will be relative with above-mentioned permanent magnet is assembled on any the opposing party's the solid of rotation, it is characterized in that: permanent magnet is assembled into mechanism on the above-mentioned solid of rotation is moved limting mechanism and moved axially limting mechanism by pressing mechanism, sense of rotation and constitute; Above-mentioned pressing mechanism makes elastic material between above-mentioned solid of rotation and above-mentioned permanent magnet, and utilize this elastic material with both at least to radially the extruding; Above-mentioned sense of rotation moves limting mechanism and last palm fibre, and to move axially limting mechanism be first locating face that forms sense of rotation in either party side of above-mentioned solid of rotation and above-mentioned permanent magnet, and form second relative with first locating face and the relative locating face with sense of rotation in the opposing party's side, contact with second locating face limiting above-mentioned solid of rotation and above-mentioned permanent magnet relatively moves in sense of rotation by above-mentioned first locating face, and limit above-mentioned solid of rotation and above-mentioned permanent magnet in axial relatively moving.
The present invention can realize neither increasing cost, does not produce ground such as fragment or smear metal again solid of rotation and permanent magnet are given in conjunction with fixing.
Description of drawings
Fig. 1 is the sectional drawing of torque limiter of the present invention.
Fig. 2 is the right side view of torque limiter.
Fig. 3 is the left side view of torque limiter.
Fig. 4 is the amplification profile of the significant points of torque limiter.
Fig. 5 is the front view of inboard solid of rotation.
Fig. 6 is the right side view of inboard solid of rotation.
Fig. 7 is the left side view of permanent magnet.
Fig. 8 is the amplification profile of significant points of the torque limiter of expression another embodiment of the present invention.
Fig. 9 is the amplification profile of significant points of the torque limiter of expression another embodiment of the present invention.
Figure 10 is the amplification profile of significant points of the torque limiter of expression another embodiment of the present invention.
Figure 11 is the sectional drawing of the torque limiter of expression another embodiment of the present invention.
Figure 12 is the sectional drawing along the A-A line that has omitted the outside solid of rotation of torque limiter.
Figure 13 (A)-Figure 13 (E) is the brief principle figure that is used to illustrate torque limiter.
Embodiment
Below, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
Among Fig. 1, label 4 is outside solid of rotation (shell) of torque limiter 2, and path portion is fixed with and covers 6 and semi-rigid magnetic (B-H loop) 8 within it.
On above-mentioned lid 6, be formed with a plurality of grooves 10 that extend along axial total length.In the torque limiter that is made of permanent magnet and semi-rigid magnetic as object of the present invention, the permanent magnet of configuration magnetizes the semi-rigid magnetic relatively, thus the proportional rotating force of area (hysteresis torque) of transmission and its magnetic hysteresis loop.And, when having surpassed maximum torque transfer capacity, permanent magnet and state relative rotate of semi-rigid magnetic to keep certain torque, at this moment, and the heating of semi-rigid magnetic, the temperature in the outside solid of rotation 4 (shell) rises.The corresponding part of temperature coefficient that this temperature rises and makes permanent magnet demagnetize and had with permanent magnet, its result, the transmitting torque of torque limiter then reduces.On the above-mentioned lid 6 formed groove 10 be formed at the outside solid of rotation 4 inner peripheral surface and cover between 6, heat in the outside solid of rotation 4 is dispersed into air outside fairlead 10 and plays a role as being used for, thereby can prevent that permanent magnet magnetic force from reducing because of the temperature in the outside solid of rotation 4 rises.
On an end face of above-mentioned permanent magnet 18, as shown in Figure 7, form recess 26, corresponding with this recess 26, on the lip part 12a of inboard solid of rotation 12, be formed with protuberance 28.Above-mentioned recess 26 and protuberance 28 have constituted at sense of rotation and the axial surface of contact 26,28 that cooperates.Above-mentioned surface of contact 26,28 is chimeric mutually, whereby, has constituted and has limited above-mentioned inboard solid of rotation 12 and permanent magnet 18 moves limting mechanism in the sense of rotation that relatively moves of sense of rotation.
Though this sense of rotation moves the moving of sense of rotation that limting mechanism limits positive and negative both direction, but to turn 4 only be under the situation of a direction with the relative sense of rotation of inboard solid of rotation 12 to sidespin outside, also can be the structure that only to limit its relative sense of rotation be the rotation of a direction.On above-mentioned inboard solid of rotation 12, be fixed with retainer 20, on the outer circumferential face of this retainer 20, be installed with the elastic material 22 that constitutes by O shape circle.
Above-mentioned elastic material 22 is fixed on the lip part 20a place of retainer 20, and contacts with retainer 20 pressure with the end of above-mentioned permanent magnet 18.The elastic force that utilizes above-mentioned elastic material 22 with above-mentioned permanent magnet 18 and inboard solid of rotation 12 to axially and radially being to push on the direction perpendicular to axial direction, utilize this extruding force, permanent magnet 18 is fixed on the inboard solid of rotation 12 by elastic material 22 with the state of no deflection.Herein, elastic material 22 constitute with inboard solid of rotation 12 and permanent magnet 18 both to the pressing mechanism of extruding radially.
Be formed on the locating face 26 on the end face of permanent magnet 18 because the axial extruding force that above-mentioned elastic material 22 produces contact with the locating face 28 of the lip part 12a of inboard solid of rotation 12, with prevention permanent magnet 18 relative inner solid of rotation 12 axial mobile.In the present embodiment, being fulcrum with retainer 20 is construed as limiting inboard solid of rotation 12 and permanent magnet 18 at the limting mechanism that moves axially that axially relatively moves at the elastic material 22 that axially permanent magnet 18 is applied power, thereby locating face 26,28 is contacted each other with this locating face 26,28.
The torque limiter 2 of Gou Chenging as mentioned above.Though by the hysteresis torque that between permanent magnet 18 and semi-rigid magnetic 8, produces with limit inboard solid of rotation 12 with outside the relative rotation of sideway swivel 4, but, import the running torque of inboard solid of rotation 12 or outer sideway swivel 4 if reach more than the torque that is limited by hysteresis torque then inboard solid of rotation 12 and the 4 relative rotations of outside solid of rotation.
Promptly, if the running torque of input is little, then the rotation with inboard solid of rotation 12 or outside solid of rotation 4 passes to outside solid of rotation 4 or inboard solid of rotation 12, but when surpassing be scheduled to big or small as if the running torque of importing, then inboard solid of rotation 12 and the 4 relative rotations of outside solid of rotation are in order to avoid excessive load acts on outside solid of rotation 4 or the inboard solid of rotation 12.
Above-mentioned first embodiment, though only disposed elastic material 22 on distolateral at one of permanent magnet 18, but as shown in Figure 8, also can make following structure: will be configured in the two ends of permanent magnet 18 by the elastic material 24,22 that O shape circle constitutes, the lip part 12b that utilizes inboard solid of rotation 12 fixedly elastic axis to the limting mechanism that moves axially that relatively moves.
In addition, in the above-described embodiments,, apply elastic force by means of the two ends of 24,22 pairs of permanent magnets 18 of elastic material though material 24 time, utilize fixedly elastic material 22 of retainer 20, with permanent magnet 18 and inboard solid of rotation 12 to radially reaching axial compression.At this moment, elastic material the 24, the 22nd, with the two ends of inboard solid of rotation 12 and permanent magnet 18 to the pressing mechanism of radially extruding the time, be limit both
So all be to utilize elastic material 22,24 that permanent magnet 18 and inboard solid of rotation 12 are pushed to radial and axial both direction, but as shown in Figure 9, also can make elastic material 22 between the end face 12c of the lip part 20a that is fixed on retainer 20 for naming a person for a particular job with retainer 20 and inboard solid of rotation 12 to the inner peripheral surface extruding of permanent magnet 18, with inner peripheral surface vertically pressure contact, the elastic force that utilizes elastic material 22 only with permanent magnet 18 and inboard solid of rotation 12 to radially extruding.At this moment, elastic material 22 constitute with inboard solid of rotation 12 and permanent magnet 18 both to the pressing mechanism of extruding radially.
Among Fig. 9, the lip part 20a of retainer 20 contacts with the end face of permanent magnet 18, and fixed permanent magnet 18, so that permanent magnet 18 relative inner solid of rotation 12 are at axial non-migration.In the present embodiment, the locating face 28 of the lip part 12a of the lip part 20a of retainer 20 and inboard solid of rotation 12 be arranged on locating face 26 on the permanent magnet 18 and constituted and limit the limting mechanism that moves axially that inboard solid of rotation and permanent magnet are axially relatively moving.
And, as shown in figure 10, also can make following structure: with elastic material 22 compressed configuration between the inner peripheral surface of the outer circumferential face of the stepped part 12e of inboard solid of rotation 12 and permanent magnet 18, and with permanent magnet 18 and inboard solid of rotation 12 to radially extruding.
Among Figure 10, elastic material 22 is fixed between the lip part 20b of the wall 12d of stepped part 12e of inboard solid of rotation 12 and retainer 20, and the lip part 20b of retainer 20 contacts with the end face of permanent magnet 18 and is fixing, so that its relative inner solid of rotation 12 is at axial non-migration.
Though the foregoing description all is as elastic material with O shape circle, but in enforcement of the present invention, be not particularly limited in O shape and enclose, as Figure 11 and shown in Figure 12, also can it axially be provided with a plurality of grooves 30 in the outer circumferential face upper edge of inboard solid of rotation 12, the bar-shaped elastic material 32 of configuration in each bar groove 30, and this elastic material 32 is contacted with the inner peripheral surface pressure of permanent magnet 18.
Embodiment's shown in Figure 11 other structure and embodiment shown in Figure 1 are roughly the same.In addition, the present invention is assembled into the semi-rigid magnetic on the solid of rotation of the outside, permanent magnet is assembled into structure on the inboard solid of rotation, but not special the qualification, also can be opposite with it, promptly make permanent magnet is assembled on the solid of rotation of the outside, and the semi-rigid magnetic is assembled into structure on the inboard solid of rotation.
Claims (3)
1. torque limiter, when relative rotation with outside solid of rotation is assembled freely with inboard solid of rotation, permanent magnet is assembled on either party solid of rotation of above-mentioned outside solid of rotation and inboard solid of rotation, semi-rigid magnetic that will be relative with above-mentioned permanent magnet is assembled on any the opposing party's the solid of rotation, it is characterized in that: the structure that permanent magnet is assembled into the mechanism on the above-mentioned solid of rotation is, make elastic material between above-mentioned solid of rotation and above-mentioned permanent magnet, utilize this elastic material with both at least to radially the extruding.
2. torque limiter according to claim 1 is characterized in that:
Above-mentioned elastic material is the annular component along the whole circumference face configuration of above-mentioned solid of rotation.
3. torque limiter, when relative rotation with outside solid of rotation is assembled freely with inboard solid of rotation, permanent magnet is assembled on either party solid of rotation of above-mentioned outside solid of rotation and inboard solid of rotation, semi-rigid magnetic that will be relative with above-mentioned permanent magnet is assembled on any the opposing party's the solid of rotation, it is characterized in that: permanent magnet is assembled into mechanism on the above-mentioned solid of rotation is moved limting mechanism and moved axially limting mechanism by pressing mechanism, sense of rotation and constitute; Above-mentioned pressing mechanism makes elastic material between above-mentioned solid of rotation and above-mentioned permanent magnet, and utilize this elastic material with both at least to radially the extruding; Above-mentioned sense of rotation moves limting mechanism and the above-mentioned limting mechanism that moves axially is first locating face that forms sense of rotation in either party side of above-mentioned solid of rotation and above-mentioned permanent magnet, and form second relative with first locating face and the relative locating face with sense of rotation in the opposing party's side, contact with second locating face limiting above-mentioned solid of rotation and above-mentioned permanent magnet relatively moves in sense of rotation by above-mentioned first locating face, and limit above-mentioned solid of rotation and above-mentioned permanent magnet in axial relatively moving.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2005069497A JP2006250283A (en) | 2005-03-11 | 2005-03-11 | Torque limiter |
| JP2005069497 | 2005-03-11 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1831354A true CN1831354A (en) | 2006-09-13 |
| CN100480156C CN100480156C (en) | 2009-04-22 |
Family
ID=36993813
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2006100012875A Expired - Fee Related CN100480156C (en) | 2005-03-11 | 2006-01-12 | Torque limiter |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP2006250283A (en) |
| CN (1) | CN100480156C (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102188221A (en) * | 2010-03-08 | 2011-09-21 | 富士胶片株式会社 | Pipe connection device of medical device |
| CN106464115A (en) * | 2014-06-20 | 2017-02-22 | 赛峰电子与防务公司 | Electromagnetic actuator with magnetic torque limiter |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4850773B2 (en) * | 2007-04-05 | 2012-01-11 | 株式会社椿本チエイン | Cylindrical magnetic gear |
| JP2011106559A (en) * | 2009-11-17 | 2011-06-02 | Yamauchi Corp | Torque limiter |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2597599Y2 (en) * | 1993-03-22 | 1999-07-05 | 光洋精工株式会社 | Bearing device |
| JPH0829720A (en) * | 1994-07-20 | 1996-02-02 | Fuji Xerox Co Ltd | Mounting structure for rotary polygon mirror |
| JP2001208094A (en) * | 2000-01-27 | 2001-08-03 | Yamauchi Corp | Co-axial cylindrical torque limiter and its process of manufacture |
-
2005
- 2005-03-11 JP JP2005069497A patent/JP2006250283A/en active Pending
-
2006
- 2006-01-12 CN CNB2006100012875A patent/CN100480156C/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102188221A (en) * | 2010-03-08 | 2011-09-21 | 富士胶片株式会社 | Pipe connection device of medical device |
| CN106464115A (en) * | 2014-06-20 | 2017-02-22 | 赛峰电子与防务公司 | Electromagnetic actuator with magnetic torque limiter |
| CN106464115B (en) * | 2014-06-20 | 2017-11-10 | 赛峰电子与防务公司 | Electromagnetic actuators |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100480156C (en) | 2009-04-22 |
| JP2006250283A (en) | 2006-09-21 |
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