CN101656177A - Thermal relay - Google Patents
Thermal relay Download PDFInfo
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- CN101656177A CN101656177A CN200810147485A CN200810147485A CN101656177A CN 101656177 A CN101656177 A CN 101656177A CN 200810147485 A CN200810147485 A CN 200810147485A CN 200810147485 A CN200810147485 A CN 200810147485A CN 101656177 A CN101656177 A CN 101656177A
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- supporter
- thermal relay
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Abstract
The invention discloses a thermal relay, which comprises a heating mechanism consisting of a group of bimetallic strips, a contact opening-closing mechanism, a heating displacement transfer device andthe like. A reset conversion device, a test device, the contact opening-closing mechanism and the like of the thermal relay are all arranged in a contact opening-closing mechanism chamber in a machine shell; a heating mechanism chamber for the arrangement of the heating mechanism and the contact opening-closing mechanism chamber are formed in the machine shell in a parallel structural form; a manual reset button, a reset conversion button and a current regulation button are allowed to extend out of the front surface of the machine shell on the surface of the machine shell from holes thereof,and are formed on the side wall of the machine shell in a structural form of being parallel to the longitudinal direction of the bimetallic strips; and the longitudinal direction of the bimetallic strips is vertical to a turnover movement plane of an a-contact supporting piece. The reset conversion device has the reset conversion functions of automatic reset and manual reset and the operation function of manual reset. The thermal relay is convenient to mount and debug; and a product has the advantages of compact structure, small volume, beautiful appearance, and harmonious proportion of length, width and height.
Description
Technical field
The present invention relates to a kind of low-voltage variation electrical equipment that prevents circuit or electric equipment long term overloading, particularly a kind of thermal relay.
Background technology
Thermal relay is to utilize the thermal effect principle of electric current to come the protector of work, is widely used in the overload protection of circuit or electric equipment (as motor), the protection of the phase failure that also can be used as motor that has and current imbalance operation.The heater element of the generation thermal effect of thermal relay is serially connected with in the circuit of electric equipment, and with the overload current of direct induction apparatus equipment, and the thermal induction element of induction overload current generally adopts bimetal leaf.Bimetal leaf is formed in the cal rolling mode by active layers sheet metal and passive layer sheet metal, the length basically identical of active layers and passive layer double layer of metal sheet before heating, coefficient is greater than the passive layer sheet metal because the hot line of active layers sheet metal expands, so its is understood to the passive layer bending after bimetal leaf is heated, and this bending displacement (also claiming the heating displacement) is used for the on/off of the circuit of control of electrical equipment.The heating of bimetal leaf can be adopted direct heating, mode such as indirect and compound heating, and the typical structure of the bimetal leaf thermal induction element of indirect or compound mode of heating is the periphery that heating resistance wire is wrapped in bimetal leaf, and an end of heating resistance wire or/and an end of bimetallic strip be connected with the input current terminal, the other end of heating resistance wire or/and the other end of bimetal leaf be connected with the electric current output lead, in order to reduce the precision influence of ambient temperature to bimetal leaf induced current thermal effect, the general mechanism of independently generating heat that the bimetal leaf thermal induction element need be located at is indoor.The on/off of the circuit of described control of electrical equipment is realized by contact deciliter mechanism, it is indoor that a contact deciliter mechanism is installed in contact deciliter mechanism, and it is made up of the moving parts such as fixed contact, moving branch fixed contact, rubber-like make contact supporter and rotatable toggle link that close.Between bimetal leaf and contact deciliter mechanism, be provided with heating displacement transfer device, the heating displacement of bimetal leaf passed to contact deciliter mechanism, pass through the on/off of the electric current of contact deciliter mechanism controls electric equipment again by this device.
The basic instructions for use of thermal relay is: can guarantee that electric equipment is not burnt because of the permissible overload ability that oversteps the extreme limit; Can maximally utilise the overload capacity of electric equipment; Can guarantee the normal startup of electric equipment.In order to satisfy basic instructions for use, following main technical requirements has been proposed in manufacturing and designing of thermal relay: should have not only reliably but also rational protective feature; Should have and automatically reset and the hand-reset function; Operating current should scalable; Has certain temperature compensation characteristic.In order to satisfy above-mentioned specification requirement, hand-reset button, reset function change-over switch and Current Regulation button need be set in contact deciliter mechanism.The hand-reset button is used for the operation that the manual operation thermal relay recovers connection; The reset function change-over switch is used for the conversion operations between hand-reset function and the auto-reset function; The Current Regulation button is used for the adjusting operation of the operating current of thermal relay.For the ease of operation, require hand-reset button, reset function change-over switch and Current Regulation button all to be arranged on the guidance panel of thermal relay.
As EP0371416 and the disclosed thermal relay of DE3840064 patent, comprise heating mechanism chamber, deciliter mechanism chamber, contact, heating displacement transfer device, lid, the thermal relay of prior art has adopted " two-layer equation " arrangement, two-layer layout is up and down pressed with the mechanism chamber that generates heat in deciliter mechanism chamber, described contact, and deciliter mechanism chamber, contact is arranged on the extend longitudinally line of bimetal leaf, as the lid of panel and the moving contact supporter extend longitudinally line perpendicular to bimetal leaf.There are following two major technique defectives in the thermal relay of this arrangement: at first be arranged on the hand-reset button that covers as panel, the reset function switching button, Current Regulation button and attach parts on these buttons, can not be with the being arranged on contact deciliter mechanism indoor moving fixed contact that closes, the moving fixed contact that divides, rubber-like make contact supporter, parts such as rotatable toggle link are realized once assembling and once debugging, the part parts indoor with being arranged on contact deciliter mechanism that promptly are arranged on the panel cover need earlier assembly and adjustment respectively, it is qualified to confirm whether debug then after closing the lid again, obviously, when debugging contact deciliter mechanism, can not once adjust and finish, need repeatedly take off repeatedly cover operation could confirm to debug whether qualified; The second, existing thermal relay product bulk shape size is bigger than normal, and particularly oversize along on the bimetal leaf extend longitudinally line of product makes the length and width of product lack of proper care at high proportion, thereby improved the requirements of installation space of product, influenced the purposes of product.
Summary of the invention
The objective of the invention is to solve the defective of above-mentioned prior art, provide a kind of structural design advantages of simple, Installation and Debugging convenient and swift, the thermal relay that length and width are coordinated at high proportion, volume is little, purposes is wide.
To achieve these goals, thermal relay of the present invention has adopted following technical scheme.
Thermal relay comprises that Current Regulation button, reset button, separation are installed in the heating mechanism that is made up of at least one bimetal leaf in the casing is connected conversion with contact deciliter mechanism, in the middle of heating mechanism and contact deciliter mechanism heating displacement transfer device, and also comprise: one has the disjunction of testing button and moves the testing apparatus 61 that closes fixed contact; One makes branch fixed contact and the moving conversion equipment 62 that resets that closes fixed contact conversion back reinstatement attitude; A heating mechanism chamber 30 and a deciliter mechanism chamber 50, contact that is used to install described contact deciliter mechanism that is used to install described heating mechanism, described heating mechanism chamber 30 and deciliter mechanism chamber 50, contact are formed in the described casing 20 with version side by side; Casing front 11 with the version of the parallel longitudinal of described bimetal leaf (31a, 31b, 31c), be formed on the described casing 20, and allow reset button 620, test button 610 and Current Regulation button 700 from the corresponding aperture that described casing front 11 forms, to stretch out.
Described testing apparatus 61, the conversion equipment 62 that resets, Current Regulation button 700 and a contact deciliter mechanism are installed in deciliter mechanism chamber 50, described contact, so that the assembly and adjustment result of each parts is not subjected to the influence of mounting cover 10.
Described contact deciliter mechanism is made of moving fixed contact, moving branch fixed contact, the turnover make contact supporter 53 of rubber-like, rotating first toggle link 51 and second toggle link 52 of closing.
Described bimetal leaf (31a, 31b, 31c) vertically vertical with the flip-flop movement face of make contact supporter 53, this flip-flop movement face is parallel with the flip-flop movement direction of make contact supporter 53.
The turnover make contact supporter 53 of described rubber-like is provided with a supporter 55, by the interaction between the protrusion muscle 62c of a table top 55b who forms on it and conversion equipment 62 afterbodys that reset, described supporter 55 can drive make contact supporter 53 and reset; The end 55a of described supporter 55 can be spacing by the muscle 20a of casing 20, thereby disconnect closing contact, to realize that this relay that is moving is carried out urgency stops operation.
Description of drawings
Fig. 1 is the side-looking decomposing schematic representation of thermal relay embodiment of the present invention.
Fig. 2 is moving testing apparatus and moving fixed contact and the moving schematic diagram that closes the conversion equipment that resets of fixed contact of dividing that closes fixed contact of the disjunction of thermal relay embodiment of the present invention.
Fig. 3 is the local enlarged diagram of Fig. 2.
Fig. 4 is the moving minute fixed contact of thermal relay embodiment of the present invention and the decomposing schematic representation that moves reset conversion equipment and the supporter that close fixed contact.
Fig. 5 is the moving minute fixed contact of thermal relay embodiment of the present invention and the partial schematic diagram that moves the conversion equipment that resets that closes fixed contact.
Fig. 6 is the moving minute fixed contact of thermal relay embodiment of the present invention and another partial schematic diagram that moves the conversion equipment that resets that closes fixed contact.
Embodiment
Below in conjunction with drawings and Examples, further specify the embodiment of thermal relay of the present invention.Thermal relay of the present invention is not limited to the specific descriptions of following examples.
Shown in Fig. 1,3, thermal relay of the present invention comprises casing 20 and lid 10.Described casing 20 is separated into heating mechanism chamber 30 and deciliter mechanism chamber 50, contact by separates walls 21.In the middle of described heating mechanism chamber 30 and deciliter mechanism chamber, contact 50, connect conversion by heating displacement transfer device.Described heating displacement transfer device is provided with one group of guide plate 41a, 41b and lever 42.Heating mechanism is installed in the described heating mechanism chamber 30, and described heating mechanism comprises one group of bimetal leaf 31a, 31b, 31c, twines resistance wire 32 respectively in the periphery of bimetal leaf 31a, 31b, 31c.
Shown in Fig. 2,3, the indoor contact deciliter mechanism that is provided with of described contact deciliter mechanism, a described contact deciliter mechanism comprises rotating first toggle link 51, second toggle link 52 and the turnover make contact supporter 53 of rubber-like, is provided with moving moving contact (not shown) and the moving moving contact (not shown) of dividing of closing on make contact supporter 53.When the electrical current of heating mechanism reaches certain value, described bimetal leaf 31a, 31b, 31c are crooked and drive guide plate 41a, 41b and laterally move, the drive lever 42 that laterally moves of guide plate laterally moves, thereby promotes rotating first toggle link 51, second toggle link 52 and the turnover make contact supporter 53 of rubber-like.When the electrical current of electro-heat equipment reaches predetermined threshold value, also be that the lateral displacement of bimetal leaf 31a, 31b, 31c is when reaching predetermined threshold value, the turnover make contact supporter 53 of rubber-like can overturn, thereby drives moving close moving contact disjunction or closure.
As Fig. 1, moving testing apparatus and moving fixed contact and the moving conversion equipment that resets that closes fixed contact of dividing that closes fixed contact of the disjunction of the thermal relay of the present invention shown in 2 or 3, casing front 11 is formed on the sidewall on the casing 20, have on it and be used for allowing test button 610, reset button 620 and Current Regulation button therefrom stretch out the hole on casing surface, this casing positive 11 and bimetal leaf 31a, 31b, the parallel longitudinal of 31c, the bimetal leaf 31a that vertically is meant described here, 31b, the bar length direction of 31c, this direction and bimetal leaf 31a, 31b, the tangential direction of the flexural oscillations of 31c is vertical.In addition, bimetal leaf 31a, 31b, 31c vertically vertical with the flip-flop movement face of the turnover make contact supporter 53 of rubber-like, this flip-flop movement face is parallel with the flip-flop movement direction of make contact supporter 53.
Said structure form of the present invention is formed on the panel of prior art and covers, panel is compared with the vertical vertical version of bimetal leaf and had the following advantages: at first be to stretch out the change-over switch 620 that resets, test button 610 and the Current Regulation button on casing surface from casing front 11 before loam cake 10 is installed, but the once mounting debugging is finished, all parts of contact deciliter mechanism are installed in the casing 20, the assembly and adjustment result of these parts is not subjected to the influence of mounting cover 10, thereby has overcome the defective of debugging repeatedly of prior art.The secondth, compact conformation has dwindled the volume of thermal relay, makes the length eurythmy of product, and external form is very attractive in appearance, and has realized the repertoire of former product with little volume.
Shown in Fig. 2,3, be exposed at the test button 610 for operator's use of positive 11 outsides of casing, be formed on the moving end that closes the testing apparatus 61 of fixed contact of disjunction.When pressing test button 610, the moving normally-closed contact that closes fixed contact is opened, and this moment, normally opened contact was not changed the warning piece no power; When on draw test during button 610, moving normally-closed contact disjunction of closing fixed contact makes the normally opened contact conversion simultaneously, the warning piece energising.By this operation, operating sensitivity and contact "on" position that can test contact deciliter mechanism.The moving testing apparatus 61 that closes fixed contact of disjunction is installed in the groove 22 of casing 20, can slide up and down in groove 22, and be undertaken spacing by the intermediate projections 61b that is formed in the testing apparatus 61.The terminal 61a of testing apparatus 61 is placed on the centre of turnover make contact supporter 53 of rubber-like and rotating first toggle link 51, described terminal 61a can drive first toggle link 51 and rotate, the rotation of first toggle link 51 drives the counter-rotating of make contact supporter 53, thereby drives the disjunction/closure of moving contact.First toggle link 51 is a closing contact with elasticity supporter 54, when downward push to test device 61, terminal 61a can promote elasticity supporter 54 and move down, and make contact supporter 53 connects the end 55a (referring to Fig. 4) of same supporter 55 because of spacing by the muscle 20a of casing 20, so can not move down thereupon, thereby the disconnection closing contact is to realize that this relay that is moving is carried out urgency stops operation.
The conversion equipment 62 that resets shown in Fig. 4,5 or 6, of the present invention making divides fixed contact and the moving conversion equipment 62 that resets that closes fixed contact conversion back reinstatement attitude not only to have the translation function that resets that automatically resets with hand-reset, but also has the operating function of hand-reset.That is to say: the conversion equipment 62 that resets is a manual reseting device, it also is the conversion equipment that resets, the conversion equipment 62 that resets comprises reset button 620, spacing preiection 62d, protruding 62b when the spacing preiection 62a when automatically reseting state, hand-reset state, protrude muscle 62c and spring wire 63, the reset button 620 that are exposed at outside the casing positive 11 that form its end are the hand-reset button, also are the change-over switches that resets.The conversion equipment 62 that resets is installed in two half slots of casing 20, uses spring wire 63 that it is installed constraint.As shown in Figure 5, the head of spring wire 63 inserts in the hole that forms on the casing 20, the middle part of spring wire 63 snaps in the mounting groove 24 of casing 20, the afterbody 63a of spring wire 63 is stuck on the protruding 62b of the conversion equipment 62 that resets, thereby make the conversion equipment 62 that resets remain in described two half slots of casing 20 to deviate from, provide elastic force to top offset can also for simultaneously the conversion equipment 62 of resetting.When rotating counterclockwise reset button 620 and make the conversion equipment 62 that resets be in the hand-reset position, the afterbody 63a of spring wire 63 applies elastic force upwards to the protruding 62b of the conversion equipment 62 that resets, make the conversion equipment 62 that resets to top offset, blocked by the fixation wall 21c of casing 20 until the spacing preiection 62d that is formed on the conversion equipment 62 that resets.The conversion equipment 62 that resets has and automatically resets and two kinds of functions of hand-reset.Close in the disjunction/closed transfer process of fixed contact with moving at the moving fixed contact that divides, the turnover make contact supporter 53 of rubber-like overturns, and drives supporter 55 and moves up.The conversion equipment 62 that resets is in when automatically reseting the position, when supporter 55 is moved upward to the protrusion muscle 62c of conversion equipment 62 afterbodys that reset, this moment is moving divides fixed contact to close fixed contact and change with moving, the turnover make contact supporter 53 of rubber-like can not continue upset, under the effect of protruding muscle 62c, supporter 55 drives make contact supporter 53 and resets, and moving fixed contact and the moving fixed contact that closes of dividing replied reset condition.When the conversion equipment 62 that resets is in the hand-reset position, supporter 55 is moved upward to the turnover make contact supporter 53 of rubber-like and overturns fully, this moment is moving divides fixed contact to close fixed contact and change with moving, and there is not masterpiece to be used for supporter 55, need press conversion equipment 62 this moment makes protrusion muscle 62c push the table top 55b of supporter 55 to, reset so supporter 55 drives make contact supporter 53, moving fixed contact and the moving fixed contact that closes of dividing replied reset condition.
The above only is a preferred embodiment of the present invention, and all technical equivalences of making according to claim of the present invention change and revise, and all should be considered as within the covering scope of the present invention.
Claims (8)
1. thermal relay, the heating displacement transfer device that it comprises reset button, Current Regulation button, separate the heating mechanism that is made up of at least one bimetal leaf that is installed in the casing and contact deciliter mechanism and be connected conversion in heating mechanism and deciliter mechanism centre, contact is characterized in that also comprising:
One has the moving testing apparatus (61) that closes fixed contact of the disjunction of testing button;
One makes branch fixed contact and the moving conversion equipment that resets (62) that closes fixed contact conversion back reinstatement attitude;
Heating mechanism chamber (30) and a deciliter mechanism chamber (50), contact that is used to install described contact deciliter mechanism that is used to install described heating mechanism, described heating mechanism chamber (30) and contact deciliter mechanism chamber (50) is formed in the described casing (20) with version side by side;
A casing front (11) with the version of the parallel longitudinal of described bimetal leaf (31a, 31b, 31c), be formed on the described casing (20), and allow reset button (620), test button (610) and Current Regulation button (700) from the corresponding aperture that described casing front (11) forms, to stretch out the casing surface.
2. thermal relay according to claim 1, it is characterized in that: described testing apparatus (61), the conversion equipment that resets (62), Current Regulation button (700) and a contact deciliter mechanism are installed in deciliter mechanism chamber (50), described contact, so that the assembly and adjustment result of each parts is not subjected to the influence of mounting cover (10).
3. thermal relay according to claim 1 and 2 is characterized in that: described contact deciliter mechanism is by moving fixed contact, moving fixed contact, the turnover make contact supporter of rubber-like (53), rotating first toggle link (51) and second toggle link (52) formation of dividing of closing.
4. thermal relay according to claim 1, it is characterized in that: described bimetal leaf (31a, 31b, 31c) vertically vertical with the flip-flop movement face of make contact supporter (53), this flip-flop movement face is parallel with the flip-flop movement direction of make contact supporter (53).
5. thermal relay according to claim 1 and 2, it is characterized in that: spacing preiection (62d), the projection (62b) of the described conversion equipment that resets (62) during, protrude muscle (62c) and spring wire (63) formation, have the operating function that automatically resets with the reset translation function and the hand-reset of hand-reset by reset button (620), spacing preiection (62a), hand-reset state when automatically reseting state.
6. according to claim 1,2 or 5 described arbitrary thermal relays, it is characterized in that: the described conversion equipment that resets (62) is mounted in the half slot (21a, 21b) that constrains in casing (20) by described spring wire (63).
7. thermal relay according to claim 6, it is characterized in that: the head (63b) of described spring wire (63) inserts in the hole (23) of casing (20), the position, intermediate portion snaps in the mounting groove (24) of casing (20), and its afterbody (63a) is stuck on the projection (62b) of the described conversion equipment that resets (62).
8. thermal relay according to claim 1, it is characterized in that: the turnover make contact supporter of described rubber-like (53) is provided with a supporter (55), by the interaction between the protrusion muscle (62c) of the table top (55b) that forms on it and the conversion equipment that resets (62) afterbody, described supporter (55) can drive make contact supporter (53) and reset; The end (55a) of described supporter (55) can be spacing by the muscle of casing (20) (20a), thereby disconnect closing contact, to realize that this relay that is moving is carried out urgency stops operation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008101474851A CN101656177B (en) | 2008-08-21 | 2008-08-21 | Thermal relay |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008101474851A CN101656177B (en) | 2008-08-21 | 2008-08-21 | Thermal relay |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101656177A true CN101656177A (en) | 2010-02-24 |
| CN101656177B CN101656177B (en) | 2012-11-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008101474851A Active CN101656177B (en) | 2008-08-21 | 2008-08-21 | Thermal relay |
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| CN (1) | CN101656177B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103512517A (en) * | 2012-06-15 | 2014-01-15 | 苏州工业园区高登威科技有限公司 | Thermorelay's bimetallic strip detector |
| CN103512515A (en) * | 2012-06-15 | 2014-01-15 | 苏州工业园区高登威科技有限公司 | Thermorelay's bimetallic strip detector |
| CN104505314A (en) * | 2014-12-02 | 2015-04-08 | 浙江正泰电器股份有限公司 | Thermal relay temperature compensation structure |
| CN110931319A (en) * | 2019-11-14 | 2020-03-27 | 天津航空机电有限公司 | Operation structure of parallel control circuit breaker |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201302959Y (en) * | 2008-08-21 | 2009-09-02 | 浙江正泰电器股份有限公司 | A thermal relay |
-
2008
- 2008-08-21 CN CN2008101474851A patent/CN101656177B/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103512517A (en) * | 2012-06-15 | 2014-01-15 | 苏州工业园区高登威科技有限公司 | Thermorelay's bimetallic strip detector |
| CN103512515A (en) * | 2012-06-15 | 2014-01-15 | 苏州工业园区高登威科技有限公司 | Thermorelay's bimetallic strip detector |
| CN104505314A (en) * | 2014-12-02 | 2015-04-08 | 浙江正泰电器股份有限公司 | Thermal relay temperature compensation structure |
| CN110931319A (en) * | 2019-11-14 | 2020-03-27 | 天津航空机电有限公司 | Operation structure of parallel control circuit breaker |
| CN110931319B (en) * | 2019-11-14 | 2021-11-02 | 天津航空机电有限公司 | Operation structure of parallel control circuit breaker |
Also Published As
| Publication number | Publication date |
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| CN101656177B (en) | 2012-11-28 |
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