CN103286710B - A kind of self clamping device expanded based on thermic line - Google Patents
A kind of self clamping device expanded based on thermic line Download PDFInfo
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Abstract
The self clamping device expanded based on thermic line disclosed by the invention, comprises micro-move device device and stroke amplification device.Micro-move device device adopts temperature-sensitive material to make temperature-sensitive driver part, utilizes the semiconductor fast-refrigerating/technology of heating to provide thermal source; Stroke amplifies a kind of interior backflow surface product moment of employing and moves stroke amplification device, while ensureing amplification coefficient, the size of output piston is not restricted.During work, setting device is initially refrigerating state, utilize the elongation driven plunger motion of replying temperature-sensitive driver part in room temperature process, clamping work pieces, and the temperature potential energy put aside under utilizing room temperature state keeps long-term clamping.This apparatus structure compact, pollution-free, environmental protection; Once clamp and only need twice unidirectional refrigeration with the course of work of unclamping, working method is simple, and energy consumption is low; Utilize temperature potential energy to keep clamping, do not need to continue to provide the energy, the utilization rate of the energy is high.
Description
Technical field
The invention belongs to mechanical grip technical field, be specifically related to a kind of self clamping device expanded based on thermic line.
Background technology
Fixture plays an important role in manufacturing industry, can improving production efficiency, ensures Labor Safety, and uses extensively.Now widely used fixture mostly is hydraulic pressure or pneumatic clamping device, but the clamping of traditional approach exists significantly not enough, specific as follows:
1, hydraulically operated fixture needs to provide pressure oil pump, and air-actuated jaw needs to provide compressed-air actuated air compressor machine, and drive source is complicated, and volume is large, and cost is high.
2, power conversion and controlling unit many, energy loss is comparatively large, and the utilization rate of the energy is low, and clamping efficiency is lower, causes the relative increase of use cost.
3, there is the mechanical driving device of High Rotation Speed, noise pollution is more serious.
4, there is the problem that fluid is revealed in hydraulicdriven fixture, easily causes environmental pollution.
5, for keeping the clamping effect continued, cause lasting energy resource consumption, the effective rate of utilization of the energy is low.
At present, a clamping device utilizing thermic line dilating principle is there is in prior art, " a kind of self clamping device (patent No.: 200810156667.5) ", this device comprises symmetrically arranged two groups of area effect stroke amplification devices and toggle mechanism, acts on the compression of Toggle Force Amplifier realizable force output element respectively and unclamp by two groups of area effect stroke amplification devices.But this apparatus structure is more complicated, and need just can complete through " heat-freeze-heat-freeze " two-way twice conversion the operation once clamped with unclamping, operating efficiency is lower.
Stroke amplification device aspect, area stroke amplification device based on pascal's principle, namely in the obturator taking fluid as medium when promoting the little piston of diameter with the large piston of diameter, output displacement will be exaggerated, and be a stroke amplification device.The computing formula of stroke amplification coefficient is as follows:
Wherein, L
i, L
obe respectively the displacement of driven plunger and output piston, D, d are respectively the diameter of driven plunger and output piston.Its significant advantage to obtain larger amplification coefficient, reaches considerable amplification effect.But there is certain defect in traditional area effect stroke amplification device.When determining multiplication factor, if restriction driven plunger size, then output piston size is also fixed thereupon, the size of output piston bar then must be sacrificed in order to back-moving spring can be laid in rod chamber, piston rod so just may be caused undersized, rigidity is poor, produces the unstable failure of piston rod; Conversely, if ensure the rigidity of output piston bar, must amplify the size of output piston, then the size of driven plunger also increases thereupon, so that whole device volume is excessive, and complex structure, cost is higher.
Therefore, in view of above problem, be necessary to propose a kind of clamping device having auto-lock function, have volume little, structure is simple, the feature of environmental protection; Working method is simply efficient, convenient operation; And the energy resource consumption produced because of lasting clamping in auto-lock process can be reduced.
Summary of the invention
In view of this, the invention provides a kind of self clamping device expanded based on thermic line, have volume little, structure is simple, the advantage of environmental protection; And working method is simply efficient, and convenient operation, improves operating efficiency and energy utilization rate, reduce use cost; Realize carrying out self-locking clamping simultaneously under the condition that continuous energy is not provided, reduce the continuous action consumption of the energy.
A kind of self clamping device expanded based on thermic line that object according to the present invention proposes, comprise micro-move device device, stroke amplification device, and control the control device of described micro-move device plant running, described micro-move device device comprises temperature-sensitive driver part, and carries out thermoregulator temperature-controlled member to described temperature-sensitive driver part;
The back-moving spring that described stroke amplification device comprises driven plunger, output piston, piston rod and is sheathed on described piston rod, described output piston is provided with at least one or more return port; The hydraulic cylinder that the hydraulic cylinder at described output piston place is corresponding with described driven plunger is connected in series mutually;
By temperature-controlled member, refrigeration process is heated to temperature-sensitive driver part; When heating or reply room temperature by refrigerating state, temperature-sensitive driver part extends, and produces microdisplacement, drives driven plunger reach, through stroke amplification device effect, microdisplacement is enlarged into the remarkable displacement of piston rod reach, clamping work pieces; Stop heating when replying room temperature or refrigeration, temperature-sensitive driver part shrinks, and drives driven plunger to reset, output piston and piston rod pressure reduce and back-moving spring effect under unclamp workpiece.
Preferably, described temperature-sensitive driver part is at least 1 temperature-sensitive drive link, and one end of described temperature-sensitive drive link is fixed, and the other end is connected with described driven plunger, and described temperature-controlled member is electrically connected with described temperature-sensitive drive link.
Preferably, described temperature-sensitive driver part is hollow and thin-walled pipe, and described hollow and thin-walled pipe adopts temperature-sensitive material to make, and is provided with semiconductor heating/cooling module inside described hollow and thin-walled pipe, one end of described hollow and thin-walled pipe is fixed, and the other end is connected with described driven plunger.
Preferably, the junction of described hollow and thin-walled pipe and described driven plunger is provided with heat insulating mattress.
Preferably, described temperature-sensitive driver part is provided with the temperature sensor be electrically connected with described control device.
Preferably, described semiconductor heating/cooling module is provided with temperature controller, and described temperature controller is electrically connected with described control device.
Preferably, described self clamping device also comprises the pressure transducer for detecting liquid pressure in described output piston rodless cavity, and described pressure transducer is electrically connected with described control device.
Compared with prior art, the advantage of the self clamping device based on the expansion of thermic line disclosed by the invention is: adopt temperature-sensitive material to make corresponding temperature-sensitive driver part, when heating or naturally reply room temperature by refrigerating state, temperature-sensitive driver part extends, produce microdisplacement, drive driven plunger reach, through stroke amplification device effect, microdisplacement is enlarged into the remarkable displacement of piston rod reach, clamping work pieces; By when heating replying state room temperature or refrigeration, temperature-sensitive driver part shrinks, and drives driven plunger to reset, output piston and piston rod pressure reduce and back-moving spring effect under unclamp workpiece.Structure is simple, easy to operate, there is not vibration and noise, decrease power conversion link, improve the utilization rate of the energy in the process clamped and reset, and reduces use cost, and environmental protection.
This temperature-sensitive driver part is equivalent to " temperature spring ", can utilize the long-term retaining clip of temperature potential energy always lock status, greatly reduce lasting energy resource consumption.
In addition, by arranging return port on the output piston of stroke amplification device, liquid medium can flow between rod chamber and rodless cavity, realizes differential effect, makes the effective active area of output piston be only the cross-sectional area of piston rod.To realize improving amplification coefficient on the basis reducing stroke amplification device volume, realize the remarkable amplification of displacement.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the structural representation of the self clamping device embodiment 1 based on the expansion of thermic line disclosed by the invention.
Fig. 2 is the structural representation of the self clamping device embodiment 2 based on the expansion of thermic line disclosed by the invention.
Fig. 3 is the structural representation of self clamping device embodiment 2 clamped condition based on the expansion of thermic line disclosed by the invention.
Fig. 4 is semiconductor heating/schematic diagram of refrigerating.
The title of the numeral in figure or the corresponding component representated by letter:
1, temperature-sensitive drive link 2, driven plunger 3, output piston 4, piston rod 5, back-moving spring 6, return port 7, temperature sensor 8, temperature controller 9, pressure transducer 10, hollow and thin-walled pipe 11, semiconductor heating/cooling module 12, heat insulating mattress 13, cold junction converter 14, hot junction converter 15, control device
Detailed description of the invention
Widely use hydraulic pressure in current manufacturing industry or pneumatic mode clamps, drive source mechanism is complicated, and volume is large, and cost is high, and energy loss is serious, and utilization rate is low, and environmental pollution is serious; And traditional area effect stroke amplification device exists certain restriction, volume cannot be reduced while the rigidity ensureing output piston bar.And traditional fixture needs energy constant consumption when keeping self-locking clamping, and energy utilization rate is low.
In addition, a kind of self clamping device of the prior art, comprise symmetrically arranged two groups of area effect stroke amplification devices and toggle mechanism, act on the compression of Toggle Force Amplifier realizable force output element respectively by two groups of area effect stroke amplification devices and unclamp.This apparatus structure is more complicated, and needs just can complete through " heat-freeze-heat-freeze " two-way twice conversion the operation once clamped with unclamping, and operating efficiency is lower.
The present invention is directed to deficiency of the prior art, propose and the invention provides a kind of self clamping device expanded based on thermic line, small volume, structure is simple; And effectively simplify clamping step, convenient operation, improve operating efficiency and energy utilization rate, reduce use cost; There is not the mechanism of high-speed motion, there is no the problem of noise and oil contamination; Do not need to provide additional energy source to realize self-locking, reduce the continuous action consumption of the energy.
A kind of self clamping device expanded based on thermic line, comprise micro-move device device, stroke amplification device and control the control device of micro-move device plant running, micro-move device device comprises temperature-sensitive driver part, and carries out thermoregulator temperature-controlled member to temperature-sensitive driver part.Wherein, temperature-sensitive driver part adopts temperature sensing material to make, and heats refrigeration process by temperature-controlled member to temperature-sensitive driver part.
The back-moving spring 5 that stroke amplification device comprises driven plunger 2, output piston 3, piston rod 4 and is sheathed on piston rod 4, one end of driven plunger 2 is connected with temperature-sensitive driver part, output piston 3 is provided with at least one or more return port 6; The hydraulic cylinder that the hydraulic cylinder at output piston 3 place is corresponding with driven plunger is connected in series mutually.
When heating or naturally reply room temperature by refrigerating state, temperature-sensitive driver part extends, and produces microdisplacement, drives driven plunger reach, through stroke amplification device effect, microdisplacement is enlarged into the remarkable displacement of piston rod reach, clamping work pieces; By when heating replying state room temperature or refrigeration, temperature-sensitive driver part shrinks, and drives driven plunger to reset, output piston and piston rod pressure reduce and back-moving spring effect under unclamp workpiece.
Liquid is squeezed into the rodless cavity of output piston by driven plunger motion, pressure in rodless cavity is increased, drives output piston to run, produce stroke amplification effect.Owing to output piston being opened one or more return port, liquid namely can intercommunication in rod chamber and rodless cavity, driven plunger promotes in the process of output piston, and the liquid in the hydraulic cylinder rod chamber that output piston is corresponding can be back in rodless cavity that to realize area differential.The computing formula that interior backflow surface product moment moves the stroke amplification coefficient of stroke amplification device is as follows:
Δ l in formula
i, Δ l
0be respectively the displacement of driven plunger and output piston, S
ifor the cross-sectional area of driven plunger, S
ofor the effective active area S of output piston
o=S
r, S
rfor the cross-sectional area of piston rod, D is the diameter of driven plunger, and d is the diameter of output piston bar.Owing to adding return port, when stroke amplifies, the effective active area of output piston is only the cross-sectional area of piston rod, therefore the size of output piston can not by the constraint of multiplication factor, to realize improving amplification coefficient on the basis of the volume reducing stroke amplification device, realize the remarkable amplification of displacement.
To be clearly and completely described technical scheme of the present invention by detailed description of the invention below.Obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
Embodiment 1
As shown in Figure 1, temperature-sensitive driver part is symmetrically arranged 2 temperature-sensitive drive links 1, and one end of temperature-sensitive drive link 1 is fixed, and the other end is connected with driven plunger 2, and temperature-controlled member is electrically connected with temperature-sensitive drive link.By being energized to circuit, temperature-sensitive drive link heats up or rear intensification naturally of freezing under electrically heated effect, temperature-sensitive drive link elongation gradually in the process heated up, promotes driven plunger reach gradually under the effect of temperature-sensitive drive link, then promotes piston rod and moves down workpiece pressing; When unclamping, stop heating or refrigeration, make temperature-sensitive drive link retracted for clearance, output piston and piston rod reset under the effect of back-moving spring 5.
Wherein, the quantity of temperature-sensitive drive link also can be 1, is fixedly connected on the center of driven plunger.Or equally distributed many etc., concrete quantity does not limit.
Temperature-sensitive drive link 1 is provided with the temperature sensor 7 be electrically connected with control device.For moment monitor temperature change, regulate timely.
Self clamping device also comprises the pressure transducer 9 for detecting liquid pressure in output piston rodless cavity, and pressure transducer 9 is electrically connected with control device.Pressure transducer detects the liquid pressure in rodless cavity, to determine the shift motion of output piston.
Embodiment 2
As shown in Figure 2,3, temperature-sensitive driver part is hollow and thin-walled pipe 10, is provided with semiconductor heating/cooling module 11 inside hollow and thin-walled pipe, and one end of hollow and thin-walled pipe 10 is fixed, and the other end is connected with driven plunger 2.
The junction of hollow and thin-walled pipe and driven plunger is provided with heat insulating mattress 12, prevents hollow and thin-walled pipe from crossing cause thermal damage driven plunger.
By utilizing semiconductor heating/refrigeration rapid translating technical role on hollow and thin-walled pipe, because the thermic line of material expands, scantling roughly linearly can increase progressively with the rising of temperature, otherwise then linearly successively decreases.Namely under semiconductor refrigerating state, material produces and shrinks, and under heating state, material produces and extends.Therefore can obtain controlled two-way microdisplacement, response frequency is high, and structure is simple.Meanwhile, heat energy is directly converted to mechanical energy by this type of drive, and conversion links is few, and the utilization ratio of the energy is high.
Semiconductor heating/refrigeration rapid translating technology is based on paltie effect: when forming loop by two kinds of different materials, and the one end in loop absorbs heat, and the other end then releases heat.Because semi-conducting material has best thermoelectric energy transfer characteristic, thus be used in heat/Refrigeration Technique in.As shown in Figure 4, its principle is as follows: P-type semiconductor and N-type semiconductor material clip form path (claim thermoelectricity to) between metal plate, superincumbent joint, and the sense of current is N → P, and temperature declines and the formation cold junction that absorbs heat.And joint below, the sense of current is P → N, and temperature rises and heat release forms hot junction.What a pair thermoelectricity was right heat/and refrigerating capacity is very limited, can by much such thermoelectricity to being connected into thermoelectric pile, even can again by the method composition Multi-stage heat pile of series and parallel.By means of heat-transfer equipments such as heat exchangers, hot junction liberated heat is used, is and heats; Cold junction is placed in certain environment and goes heat absorption, be refrigeration.As long as the change sense of current, cool and heat ends direction is changed immediately mutually.
The advantage body of semiconductor heating/Refrigeration Technique is:
1, there is no moving component, thus there is no vibration & noise, good stability, long service life.
2, do not use cold-producing medium, avoid refrigrant leakage and the pollution to environment.
3, heat/refrigeration work consumption can from a few milliwatt to the scope of upper myriawatt, and temperature range reaches 20 ~ 150 DEG C, and the scope of application is wider.
4, energy adjustment performance is good, regulates operating voltage or electric current to heat/refrigerating capacity with regard to adjustable, and easily accomplishes that high accuracy regulates by temperature measurement and control means.
5, heat/freeze conversion fast, thermal inertia is very little, freezes, to heat the time very fast.
Hollow and thin-walled pipe 10 is provided with the temperature sensor 7 be electrically connected with control device.For moment monitor temperature change, regulate timely.
Semiconductor heating/cooling module is provided with temperature controller 8, temperature controller is electrically connected with control device.Control device acts on temperature controller according to the feedback signal of temperature sensor, realizes semiconductor heating/cooling module action.
Self clamping device also comprises the pressure transducer 9 for detecting liquid pressure in output piston rodless cavity, and pressure transducer 9 is electrically connected with control device.Pressure transducer detects the liquid pressure in rodless cavity, to determine the shift motion of output piston.
The operation principle of the present embodiment is as follows:
Original state: semiconductor heating/cooling module first freezes, then hollow and thin-walled pipe 10 shrinks, and piston rod 4 is in position topmost.
Clamp operation state: the hollow and thin-walled pipe be under cold shrink state is heated by semiconductor heating/cooling module, or cancel refrigeration temperature is gone up two approach naturally, finally reach room temperature state.In this course, hollow and thin-walled pipe Yin Wendu raises and will extend, and this microdisplacement is enlarged into the remarkable displacement that piston rod moves downward by stroke amplification device, realizes the clamping of workpiece.
Self-locking state: when utilizing the spring of compressive state to clamp, because elastic potential energy put aside by spring, not needing to provide extra energy just can keep the state of long-term clamping, is a kind of energy-efficient clamping mode.The temperature sensing material with linear thermal expansion effect is similar to one " temperature spring ", is first placed on contraction state, hollow and thin-walled pipe elongated clip clamping of workpieces in recovery room temperature process, utilizes " temperature potential energy " to keep clamping after room temperature to be achieved.Room temperature significantly can not change and not need to provide additional energy to keep, and therefore device can retaining clip always lock status for a long time.
Unclamp workpiece, restPose: when semiconductor heating/cooling module freezes again, hollow and thin-walled pipe shrinks, and driven plunger is to left movement, and piston rod moves upward, and unclamps workpiece.
The invention discloses a kind of self clamping device expanded based on thermic line, adopt temperature-sensitive material to make corresponding temperature-sensitive driver part.In order to reach the effect utilizing temperature potential energy to carry out self-locking, be initially refrigerating state, when replying room temperature by refrigerating state, temperature-sensitive driver part extends, and drive driven plunger reach, under the effect of driven plunger, output piston and piston rod move forward, clamping work pieces; When again freezing, temperature-sensitive driver part shrinks, and drives driven plunger to reset, output piston and piston rod pressure reduce and back-moving spring effect under unclamp workpiece.This device can realize the clamping of workpiece by means of only twice unidirectional process of refrigerastion and unclamp.Whole device volume is less, and structure is simple; And effectively simplify clamping step, convenient operation, improve operating efficiency and energy utilization rate, reduce use cost; There is not the mechanism of high-speed motion, there is no the problem of noise and oil contamination; Do not need to provide additional energy source to realize self-locking, reduce the continuous action consumption of the energy, environmental protection.
This temperature-sensitive driver part is equivalent to " temperature spring ", can utilize the long-term retaining clip of temperature potential energy always lock status, greatly reduce lasting energy resource consumption.
In addition, by arranging return port on the output piston of stroke amplification device, liquid medium can flow between rod chamber and rodless cavity, realize differential effect, the effective active area of output piston is made to be only the cross-sectional area of piston rod, therefore the size of output piston by the restriction of multiplication factor, to realize improving amplification coefficient on the basis reducing stroke amplification device volume, can not realize the remarkable amplification of displacement.
To the above-mentioned explanation of the disclosed embodiments, professional and technical personnel in the field are realized or uses the present invention.To be apparent for those skilled in the art to the multiple amendment of these embodiments, General Principle as defined herein can without departing from the spirit or scope of the present invention, realize in other embodiments.Therefore, the present invention can not be restricted to these embodiments shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.
Claims (7)
1. the self clamping device expanded based on thermic line, it is characterized in that, comprise micro-move device device, stroke amplification device, and control the control device of described micro-move device plant running, described micro-move device device comprises temperature-sensitive driver part, and carries out thermoregulator temperature-controlled member to described temperature-sensitive driver part;
The back-moving spring that described stroke amplification device comprises driven plunger, output piston, piston rod and is sheathed on described piston rod, described output piston is provided with at least one or more return port; The hydraulic cylinder that the hydraulic cylinder at described output piston place is corresponding with described driven plunger is connected in series mutually; Described output piston is positioned at workpiece side, and piston rod is pressed on workpiece;
By temperature-controlled member, refrigeration process is heated to temperature-sensitive driver part; When heating or reply room temperature by refrigerating state, temperature-sensitive driver part extends, and produces microdisplacement, drives driven plunger reach, through stroke amplification device effect, microdisplacement is enlarged into the remarkable displacement of piston rod reach, clamping work pieces; Stop heating when replying room temperature or refrigeration, temperature-sensitive driver part shrinks, and drives driven plunger to reset, output piston and piston rod pressure reduce and back-moving spring effect under unclamp workpiece.
2. as claimed in claim 1 based on the self clamping device that thermic line expands, it is characterized in that, described temperature-sensitive driver part is at least 1 temperature-sensitive drive link, one end of described temperature-sensitive drive link is fixed, the other end is connected with described driven plunger, and described temperature-controlled member is electrically connected with described temperature-sensitive drive link.
3. as claimed in claim 1 based on the self clamping device that thermic line expands, it is characterized in that, described temperature-sensitive driver part is hollow and thin-walled pipe, described hollow and thin-walled pipe adopts temperature-sensitive material to make, semiconductor heating/cooling module is provided with inside described hollow and thin-walled pipe, one end of described hollow and thin-walled pipe is fixed, and the other end is connected with described driven plunger.
4., as claimed in claim 3 based on the self clamping device that thermic line expands, it is characterized in that, the junction of described hollow and thin-walled pipe and described driven plunger is provided with heat insulating mattress.
5., as claimed in claim 1 based on the self clamping device that thermic line expands, it is characterized in that, described temperature-sensitive driver part is provided with the temperature sensor be electrically connected with described control device.
6., as claimed in claim 3 based on the self clamping device that thermic line expands, it is characterized in that, described semiconductor heating/cooling module is provided with temperature controller, and described temperature controller is electrically connected with described control device.
7. as claimed in claim 1 based on the self clamping device that thermic line expands, it is characterized in that, described self clamping device also comprises the pressure transducer for detecting liquid pressure in described output piston rodless cavity, and described pressure transducer is electrically connected with described control device.
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| CN101363423A (en) * | 2008-09-12 | 2009-02-11 | 苏州大学 | Method and device for implementing low-speed rectilinear movement |
| CN101386136A (en) * | 2008-09-23 | 2009-03-18 | 苏州大学 | Self locking device for clamping articles |
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Effective date of registration: 20180621 Address after: 215300 No. 10 workshop of Fumin five District, Yan Qiao Bang Road, Yushan Town, Kunshan, Jiangsu. Patentee after: KUNSHAN JET ELECTRONIC TECHNOLOGY CO., LTD. Address before: 215123 199 Ren Yan Road, Suzhou Industrial Park, Jiangsu Patentee before: Soochow University |