CN102011813A - Roller type mechanical torque limiter - Google Patents
Roller type mechanical torque limiter Download PDFInfo
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- CN102011813A CN102011813A CN2009100186955A CN200910018695A CN102011813A CN 102011813 A CN102011813 A CN 102011813A CN 2009100186955 A CN2009100186955 A CN 2009100186955A CN 200910018695 A CN200910018695 A CN 200910018695A CN 102011813 A CN102011813 A CN 102011813A
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- roller
- wheel
- star
- cushion block
- overrunning clutch
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Abstract
The invention discloses a roller type mechanical torque limiter, belonging to the field of mechanical torque limiters. The roller type mechanical torque limiter is internally provided with an overrunning roller clutch mechanism with an inner star wheel and is characterized in that solid parts near contact parts between the inner star wheel 1 in the overrunning roller clutch mechanism with the inner star wheel and a plurality of rollers 3 are respectively manufactured into stepped rectangular roller cushion blocks 5, which are separated from the inner star wheel 1 and can move in a constrained way along the radial direction of the inner star wheel 1 under the action of elastic force, and main spring mechanisms 6, which can enable the roller cushion blocks 5 to move towards the direction in which the rollers 3 can be compressed between the roller cushion blocks 5 and outer rings 2, are arranged between the roller cushion blocks 5 and the inner star wheel 1.
Description
One, technical field
The present invention is a kind of roller type machinery limit square device that belongs to machinery limit square device field.
Two, background technique
We know that in mechanical transmission fields, machinery limit square device is a very important components, and its main effect is the limit mechanical system filters out load in running a spike load, plays the overload protective function to equipment.In the course of the work in case the overflow phenomenon occurs, mechanism will avoid machinery to be subjected to strong impact by the mode of friction slip, it is a kind of safety clutch that this mechanism also can be understood as, both equipment was under the normal load condition, mechanism's combination, under the situation of overflow, mechanism will filter out the spike load of appearance in the mode of friction slip.
At present traditional machinery limit square device kind is more, roughly have friction disk type, steel ball type or the like, but a common characteristic of these products is exactly a friction pair in its mechanism all is lower pair in general, even steel ball type owing to can't form effective rolling friction between steel ball and the matching hole, so says in principle and also belong to the category that lower pair rubs.Because the lower pair friction mainly is the face friction, so allow the time of friction slip when the frictional heat of Chan Shenging has just influenced working life of product and overload to a certain extent in the course of the work, therefore, the overload time of skidding that most of traditional machinery limit square devices are allowed relatively all is relatively shorter, promptly in a single day occurring limitting the square device to beat transships when sliding, system just should take measures timely, generally be timely power source to be turned off or thrown off, otherwise just be easy to make machinery limit square device to damage owing to overheated, so that this point is said so to a certain extent is very inconvenient.
Three, summary of the invention
The objective of the invention is to propose a kind of basic functional principle of utilizing traditional roller-type overrunning clutch, the principle technological scheme of that the overload that can adapt to the relative long period that adopts the mode of the rolling friction of high friction pair to carry out overload protection is skidded and the roller type machinery limit square device that working life is relatively long.
The present invention realizes like this, having star-wheel in the mechanism is the roller-type overrunning clutch mechanism of star-wheel, it is characterized in that: with star-wheel be on the star-wheel 1 in the roller-type overrunning clutch mechanism of star-wheel with a plurality of rollers 3 contacting points near entity part make respectively with star-wheel 1 split and can be at the roller cushion block 5 of the ladder rectangle of radially doing restricted motion of the effect lower edge of elastic force star-wheel 1, and can make roller cushion block 5 towards the main spring mechanism 6 that roller 3 is pressed on the direction motion between roller cushion block 5 and the outer shroud 2 being equipped with between roller cushion block 5 and the star-wheel 1.
Also just star-wheel be on the out star wheel 9 in the roller-type overrunning clutch mechanism of out star wheel with a plurality of rollers 8 contacting points near entity part make respectively with out star wheel 9 splits and can be at the roller cushion block 11 of the ladder rectangle of radially doing restricted motion of the effect lower edge of elastic force out star wheel 9, and can make roller cushion block 11 towards the main spring mechanism 10 that roller 8 is pressed on the direction motion between roller cushion block 11 and the interior ring 7 being equipped with between roller cushion block 11 and the out star wheel 9.
The elastic force available hydraulic power of the main spring mechanism 6 or the 10 pairs of roller cushion blocks 5 or 11 effects or atmospheric pressure substitute.
Spring knock pin mechanism 4 in the mechanism can be removed, and the opposite side fixed installation of roller 3 axis corresponding with former spring knock pin mechanism 4 is one or more in roller-type overrunning clutch mechanism star-wheel 1 keeps the rectangle or the cylinder-shaped magnet 13 of certain distance with roller axis.
Spring knock pin mechanism 12 in the mechanism can be removed, and the opposite side fixed installation of roller 8 axis corresponding with former spring knock pin mechanism 12 is one or more in roller-type overrunning clutch mechanism out star wheel 9 keeps the rectangle or the cylinder-shaped magnet 14 of certain distance with roller axis.
From technique scheme as can be seen, their common feature is that the position that contacts with roller on the star-wheel has been not traditional overall structure, like this, the wedging of just effectively having avoided roller in traditional roller-type overrunning clutch is to rely on the small elastic strain of star-wheel and outer shroud or interior ring and roller self and by having come the situation of wedge rollers from trivial form, because this dependence comes its wedging power of mode of wedge rollers relatively very big often from trivial, in case the overload skidding occurs, mechanism is easy to cause damage, and according to the difference of loading condition, the torque when also very prior difficulty is determined to skid is much.And behind employing this programme, because roller cushion block 5 or 11 is to rely on spacing back of positioning step of self and the pressure that provides by main spring mechanism 6 or 10 to compress roller, so, the size of the elastic force of main spring mechanism has just determined roller type machinery limit square device peak torque, generally speaking, because it is less relatively by the elastic force that main spring mechanism produces, so roller is relative also smaller with the contact stress between the roller cushion block, adding that mechanism's roller in overload is skidded process is to be under the working state of rolling friction to work largely, so the frictional heat that produces also compares less, therefore, just improved the working life of mechanism largely, even the overload of long period is skidded relatively, mechanism can not damage yet.
During concrete work, the star-wheel and the power source of roller type machinery limit square device can be connected, outer shroud 2 or interior ring 7 are connected with load, under the original state of starting, main spring mechanism is by the roller cushion block and play the spring knock pin mechanism or the magnet that make the roller positioning action roller is pressed on the working position, after power is connected, star-wheel drives the roller motion, owing to will overcome the load its own inertial, so roller under the effect of main spring mechanism will through the overload of certain hour skid the back and begin progressively begin drive outer shroud 2 or interior ring 7 begins to rotate, at this moment roller is also in progressively wedging, the elastic acting force of main spring mechanism is tending to balance progressively also, reaches synchronous rotation until mechanism.These characteristics are basic characteristics of roller-type overrunning clutch, are the character with flexible combination.As can be seen; because the pressure that main spring mechanism provides changes not quite basically; so mechanism's output torque changes not quite basically; even; when 1/2nd of the roller angle of wedge meets or exceeds the friction angle of mechanism; mechanism still can be more stable the output torque; and; because the friction factor of mechanism is constant in principle, so, in case the load of load increases; mechanism will very fast skidding; play overload protective function, and, experimental results show that; when 1/2nd of the angle of wedge of roller surpasses the friction angle of mechanism; in relatively large scope, the output torque of mechanism all is substantially invariable, so have automatic compensation ability in a big way during mechanism's concentrated wear.Therefore effective overload protective function can play to mechanical system in mechanism, and working life is also longer relatively.
Because the present invention has adopted rolling friction pair, skid so can adapt to the overload of relative long period, and working life is longer relatively, so, implement the back expectation and can receive more positive effect.
Four, description of drawings
The present invention has 6 accompanying drawings, Fig. 1 is that star-wheel is the basic principle schematic of the roller type machinery limit square device of star-wheel, Fig. 2 is that star-wheel is the basic principle schematic of the roller type machinery limit square device of out star wheel, Fig. 3 is to be the basic principle schematic of the roller type machinery limit square device of star-wheel with the star-wheel that magnet 13 substitutes spring knock pin mechanism 4, Fig. 4 is to be the basic principle schematic of the roller type machinery limit square device of star-wheel with the star-wheel that magnet 14 substitutes spring knock pin mechanism 12, Fig. 5 is that Fig. 3 adopts roller 3 in the mechanism to adopt along the basic principle schematic of the roller type machinery limit square device of the radial centre lines bilateral symmetry distributed architecture of roller cushion block 5, and Fig. 6 is that Fig. 4 adopts roller 8 in the mechanism to adopt along the basic principle schematic of the roller type machinery limit square device of the radial centre lines bilateral symmetry distributed architecture of roller cushion block 11.
Among each figure: 1, star-wheel, 2, outer shroud, 3, roller, 4, spring knock pin mechanism, 5, the roller cushion block, 6, main spring mechanism, 7, interior ring, 8, roller, 9, out star wheel, 10, main spring mechanism, 11, roller cushion block, 12, spring knock pin mechanism, 13, magnet, 14, magnet.
Five, embodiment
Below, in conjunction with Figure of description, the present invention is described in further detail.
In Fig. 1, having star-wheel in the mechanism is the roller-type overrunning clutch mechanism of star-wheel, it is characterized in that: with star-wheel be on the star-wheel 1 in the roller-type overrunning clutch mechanism of star-wheel with a plurality of rollers 3 contacting points near entity part make respectively with star-wheel 1 split and can be at the roller cushion block 5 of the ladder rectangle of radially doing restricted motion of the effect lower edge of elastic force star-wheel 1, and can make roller cushion block 5 towards the main spring mechanism 6 that roller 3 is pressed on the direction motion between roller cushion block 5 and the outer shroud 2 being equipped with between roller cushion block 5 and the star-wheel 1.As can be seen, in fact this mechanism improves on the basis of traditional roller-type overrunning clutch and forms, but, here be to use as machinery limit square device, rather than as the free wheel device use, in case of necessity, the effect of free wheel device also can be played by mechanism.This improved concrete grammar is a structural type of that it(?) will the entity part corresponding with each roller 3 on star-wheel 1 making the roller cushion block 5 of branch body structure, and it is held out against on specific working position by main spring mechanism 6, generally speaking, main spring mechanism 6 can adopt the belleville spring of standard, because the output torque of mechanism is to be proportional to contact stress between roller 3 and the roller cushion block 5, and the size of its contact stress depends on the positive pressure of belleville spring to roller cushion block 5 here fully, so, adjust the size of belleville spring, just can obtain different output torques the positive pressure of roller cushion block 5.
In Fig. 2, also just star-wheel be on the out star wheel 9 in the roller-type overrunning clutch mechanism of out star wheel with a plurality of rollers 8 contacting points near entity part make respectively with out star wheel 9 splits and can be at the roller cushion block 11 of the ladder rectangle of radially doing restricted motion of the effect lower edge of elastic force out star wheel 9, and can make roller cushion block 11 towards the main spring mechanism 10 that roller 8 is pressed on the direction motion between roller cushion block 11 and the interior ring 7 being equipped with between roller cushion block 11 and the out star wheel 9.As can be seen, technological scheme among Fig. 2 is identical with its basic principle of technological scheme among Fig. 1, and it is the roller-type overrunning clutch mechanism of out star wheel that difference has been to adopt star-wheel here, so, during specific design, can select for use flexibly according to different situations.
The elastic force available hydraulic power of the main spring mechanism 6 or the 10 pairs of roller cushion blocks 5 or 11 effects or atmospheric pressure substitute.In some cases, the safe torque of the output of roller type machinery limit square device may be often to adjust according to different operating conditions, so at this moment can adopt hydraulic coupling or atmospheric pressure to substitute the elastic force of the generation of belleville spring, but adopt this scheme to want complicated relatively in structure, generally speaking, can adopt annular cylinder or annular cylinder with star-wheel 1 or out star wheel 9 coaxial rotations to drive the roller cushion block, at this moment, because the hydraulic coupling or the atmospheric pressure of input are continuously adjustable, so just can satisfy the adjustable requirement of output torque.
In Fig. 3, spring knock pin mechanism 4 in the mechanism can be removed, and the opposite side fixed installation of roller 3 axis corresponding with former spring knock pin mechanism 4 is one or more in roller-type overrunning clutch mechanism star-wheel 1 keeps the rectangle or the cylinder-shaped magnet 13 of certain distance with roller axis.
In Fig. 4, spring knock pin mechanism 12 in the mechanism can be removed, and the opposite side fixed installation of roller 8 axis corresponding with former spring knock pin mechanism 12 is one or more in roller-type overrunning clutch mechanism out star wheel 9 keeps the rectangle or the cylinder-shaped magnet 14 of certain distance with roller axis.
As can be seen, when the structure among employing Fig. 3 and Fig. 4, though its basic working principle is identical with technique scheme, but owing to be to adopt with the discontiguous magnet of roller roller is sucked on the working position in the mechanism, so roller does not have the ejector pin in the spring knock pin mechanism 4 to press closer on roller when overload is skidded, like this, just lacked the friction pair of a slip in the mechanism, so roller has generated heat skidding when doing rolling friction with regard to more difficult.Can know from the basic principle of roller-type overrunning clutch, when clutch surmounts operation, influencing the principal element that its limit surmounts rotating speed is exactly the existence of spring knock pin mechanism 4, so, adopt this structure can reduce the heat that produces when mechanism's overload is skidded largely, effectively improve the working life of mechanism.
In Fig. 5 and Fig. 6, the roller 3 in the mechanism or 8 adopts the structure that distributes along the radial centre lines bilateral symmetry of roller cushion block 5 or 11.As can be seen, in fact this mechanism form is appreciated that become to be two cover roller types machinery limit square devices are combined according to the direction of forward and backward and uses, basic its working principle is identical with the aforementioned techniques scheme, generally be to make the wedging direction of roller be arranged as one group during specific design with positive and negative direction, and form and organize more, then along the star-wheel circumferential arrangement in mechanism, form the purpose that forward and backward all can play the effect of limit square.The structure that whether adopts this two-way working is to decide according to concrete usage requirement, needs the rotation of frequent positive and negative direction during as the work of some equipment, so can adopt this structure.
From technique scheme as can be seen, their common feature is that the position that contacts with roller on the star-wheel has been not traditional overall structure, like this, the wedging of just effectively having avoided roller in traditional roller-type overrunning clutch is to rely on the small elastic strain of star-wheel and outer shroud or interior ring and roller self and by having come the situation of wedge rollers from trivial form, because this dependence comes its wedging power of mode of wedge rollers relatively very big often from trivial, in case the overload skidding occurs, mechanism is easy to cause damage, and according to the difference of loading condition, the torque when also very prior difficulty is determined to skid is much.And behind employing this programme, because roller cushion block 5 or 11 is to rely on spacing back of positioning step of self and the pressure that provides by main spring mechanism 6 or 10 to compress roller, so, the size of the elastic force of main spring mechanism has just determined roller type machinery limit square device peak torque, generally speaking, because it is less relatively by the elastic force that main spring mechanism produces, so roller is relative also smaller with the contact stress between the roller cushion block, adding that mechanism's roller in overload is skidded process is to be under the working state of rolling friction to work largely, so the frictional heat that produces also compares less, therefore, just improved the working life of mechanism largely, even the overload of long period is skidded relatively, mechanism can not damage yet.
During concrete work, the star-wheel and the power source of roller type machinery limit square device can be connected, outer shroud 2 or interior ring 7 are connected with load, under the original state of starting, main spring mechanism is by the roller cushion block and play the spring knock pin mechanism or the magnet that make the roller positioning action roller is pressed on the working position, after power is connected, star-wheel drives the roller motion, owing to will overcome the load its own inertial, so roller under the effect of main spring mechanism will through the overload of certain hour skid the back and begin progressively begin drive outer shroud 2 or interior ring 7 begins to rotate, at this moment roller is also in progressively wedging, the elastic acting force of main spring mechanism is tending to balance progressively also, reaches synchronous rotation until mechanism.These characteristics are basic characteristics of roller-type overrunning clutch, are the character with flexible combination.As can be seen; because the pressure that main spring mechanism provides changes not quite basically; so mechanism's output torque changes not quite basically; even; when 1/2nd of the roller angle of wedge meets or exceeds the friction angle of mechanism; mechanism still can be more stable the output torque; and; because the friction factor of mechanism is constant in principle, so, in case the load of load increases; mechanism will very fast skidding; play overload protective function, and, experimental results show that; when 1/2nd of the angle of wedge of roller surpasses the friction angle of mechanism; in relatively large scope, the output torque of mechanism all is substantially invariable, so have automatic compensation ability in a big way during mechanism's concentrated wear.Therefore effective overload protective function can play to mechanical system in mechanism, and working life is also longer relatively.
Claims (6)
1. a roller type machinery is limit the square device, having star-wheel is the roller-type overrunning clutch mechanism of star-wheel, it is characterized in that: with star-wheel be star-wheel (1) in the roller-type overrunning clutch mechanism of star-wheel go up with a plurality of rollers (3) contacting point near entity part make respectively with star-wheel (1) split and can be at the roller cushion block (5) of the ladder rectangle of radially doing restricted motion of the effect lower edge of elastic force star-wheel (1), and can make roller cushion block (5) towards main spring mechanism (6) that the direction that roller (3) is pressed between roller cushion block (5) and the outer shroud (2) is moved being equipped with between roller cushion block (5) and the star-wheel (1).
2. a roller type machinery is limit the square device, having star-wheel is the roller-type overrunning clutch mechanism of out star wheel, it is characterized in that: with star-wheel be out star wheel (9) in the roller-type overrunning clutch mechanism of out star wheel go up with a plurality of rollers (8) contacting point near entity part make respectively with out star wheel (9) split and can be at the roller cushion block (11) of the ladder rectangle of radially doing restricted motion of the effect lower edge of elastic force out star wheel (9), and can make roller cushion block (11) towards main spring mechanism (10) that the direction that roller (8) is pressed between roller cushion block (11) and the interior ring (7) is moved being equipped with between roller cushion block (11) and the out star wheel (9).
3. roller type machinery limit square device according to claim 1 and 2, it is characterized in that: main spring mechanism (6) or (10) substitute with hydraulic coupling or atmospheric pressure the elastic force of roller cushion block (5) or (11) effect.
4. roller type machinery limit square device according to claim 1, it is characterized in that: the spring knock pin mechanism (4) in the mechanism is removed, and the opposite side of roller (3) axis corresponding with former spring knock pin mechanism (4) fixedly mounts rectangle or cylinder-shaped magnet (13) one or more and roller axis maintenance certain distance in roller-type overrunning clutch mechanism star-wheel (1).
5. roller type machinery limit square device according to claim 2, it is characterized in that: the spring knock pin mechanism (12) in the mechanism is removed, and the opposite side of roller (8) axis corresponding with former spring knock pin mechanism (12) fixedly mounts rectangle or cylinder-shaped magnet (14) one or more and roller axis maintenance certain distance in roller-type overrunning clutch mechanism out star wheel (9).
6. according to claim 1 or 2 or 4 or 5 described roller type machinery limit square devices, it is characterized in that: the structure that distributes along the radial centre lines bilateral symmetry of roller cushion block (5) or (11) is adopted in the roller in the mechanism (3) or (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100186955A CN102011813A (en) | 2009-09-08 | 2009-09-08 | Roller type mechanical torque limiter |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100186955A CN102011813A (en) | 2009-09-08 | 2009-09-08 | Roller type mechanical torque limiter |
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|---|---|
| CN102011813A true CN102011813A (en) | 2011-04-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009100186955A Pending CN102011813A (en) | 2009-09-08 | 2009-09-08 | Roller type mechanical torque limiter |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103016567A (en) * | 2012-12-21 | 2013-04-03 | 南京理工大学 | Roller type bidirectional overrunning clutch having torque limiting function under static state |
| CN103047317A (en) * | 2012-12-31 | 2013-04-17 | 西南大学 | Internal star wheel overrun clutch |
| CN108547237A (en) * | 2018-04-25 | 2018-09-18 | 绵阳市维博电子有限责任公司 | A kind of gate inhibition's lifeline |
| WO2019068272A1 (en) * | 2017-10-05 | 2019-04-11 | TFA s.r.o. | Freewheel mechanism |
-
2009
- 2009-09-08 CN CN2009100186955A patent/CN102011813A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103016567A (en) * | 2012-12-21 | 2013-04-03 | 南京理工大学 | Roller type bidirectional overrunning clutch having torque limiting function under static state |
| CN103047317A (en) * | 2012-12-31 | 2013-04-17 | 西南大学 | Internal star wheel overrun clutch |
| CN103047317B (en) * | 2012-12-31 | 2015-10-28 | 西南大学 | Internal star wheel overrun clutch |
| WO2019068272A1 (en) * | 2017-10-05 | 2019-04-11 | TFA s.r.o. | Freewheel mechanism |
| CN108547237A (en) * | 2018-04-25 | 2018-09-18 | 绵阳市维博电子有限责任公司 | A kind of gate inhibition's lifeline |
| CN108547237B (en) * | 2018-04-25 | 2020-07-14 | 绵阳市维博电子有限责任公司 | Entrance guard railing device |
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Application publication date: 20110413 |