CN218631813U - Motor overload heat protector - Google Patents
Motor overload heat protector Download PDFInfo
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- CN218631813U CN218631813U CN202223296523.4U CN202223296523U CN218631813U CN 218631813 U CN218631813 U CN 218631813U CN 202223296523 U CN202223296523 U CN 202223296523U CN 218631813 U CN218631813 U CN 218631813U
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- protector
- glue
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- shell
- contact
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Abstract
The utility model discloses a motor overload thermal protector, which comprises a protector body, wherein a PTC chip is arranged on the bottom surface of the protector body, a stationary contact is arranged on the top surface of the protector body, the protector also comprises a shell, the shell is arranged on the protector body, a metal piece is arranged on the inner side of the shell, one end of the metal piece is provided with a movable contact, the stationary contact is contacted with the movable contact, the shell is connected with a wire output end, and the protector body is connected with a wire input end; the protector is characterized in that laminated insulating paper is fixed between the protector body and the shell through glue, and a glue seepage groove is formed in the shell to collect melted glue. This application has the better advantage of leakproofness.
Description
Technical Field
The utility model belongs to the technical field of hot protector, concretely relates to motor overload hot protector.
Background
The thermal protector is formed by that the metal sheet 5 generates heat after passing through current and is transmitted, conducted or radiated by or through the ambient temperature, and because the thermal expansion coefficients of two different alloys of the metal sheet 5 are different, the metal sheet 5 tends to bend towards one direction, so that the contact is separated, and the electricity is cut off. The bending speed is proportional to the magnitude of the current passing through it. Thus protecting the electric equipment. The electric heating device is widely applied to the fields of motors, air conditioners, refrigerators, washing machines, fans, ballasts, transformers, blowers, rechargeable batteries, range hoods, massagers, electric blankets, heating elements, aquarium electrical appliances and the like.
At present, the stationary contact penetrates through the conductive base plate and is fixed on the conductive base plate in a riveting manner. In the dipping treatment process, the temperature of the glue is higher, and the static contact and the conductive bottom plate are made of different metal materials, so that the expansion coefficients of the static contact and the conductive bottom plate are inconsistent. The deformation volume is inconsistent under high temperature for stationary contact and electrically conductive bottom plate, can produce the clearance between stationary contact and the electrically conductive bottom plate at will, leads to glue to enter into hot protector, influences hot protector performance, shortens hot protector life.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a motor overload thermal protector for solve the above-mentioned problem that exists among the prior art.
In order to achieve the above purpose, the utility model adopts the following technical scheme: a motor overload thermal protector comprises a protector body, wherein a PTC chip is installed on the bottom surface of the protector body, a stationary contact is arranged on the top surface of the protector body, the protector also comprises a shell, the shell is installed on the protector body, a metal piece is arranged on the inner side of the shell, a movable contact is installed at one end of the metal piece, the stationary contact is in contact with the movable contact, a lead output end is connected to the shell, and a lead input end is connected to the protector body;
the protector is characterized in that laminated insulating paper is fixed between the protector body and the shell through glue, and a glue seepage groove is formed in the shell to collect melted glue.
Preferably, the glue permeation groove is provided with a plurality of, a plurality of glue permeation grooves are parallel to each other.
Preferably, the cross section of the glue permeation groove is triangular.
Preferably, the glue permeation grooves are 1-3cm.
Preferably, a sealing cap for sealing the PTC chip is mounted on the protector body.
Preferably, the metal piece comprises a first metal piece and a second metal piece, one end of the first metal piece is connected with the shell, and the other end of the first metal piece is connected with the second metal piece.
Preferably, the metal piece is an inclined plate.
Preferably, the movable contact is fixed at the bottom end of the second metal piece, and the movable contact is abutted against the fixed contact.
Preferably, the cross section of the laminated insulating paper is in a shape of a rectangular column with an opening.
Has the beneficial effects that: when the protector works, external current is conducted to the fixed contact through the protector body, current at the fixed contact is conducted to the movable contact, current at the movable contact is conducted to the metal piece, current at the metal piece passes through the shell, and the current is transmitted out through the shell; when the temperature of the metal piece is higher, the metal piece can generate upward bending deformation, so that the movable contact moves to one side far away from the fixed contact, and the movable contact and the fixed contact are in non-contact; the glue for bonding the laminated insulating paper and the shell melts due to overhigh temperature, and the melted glue flows into the glue seepage groove, so that the glue is prevented from overflowing.
Drawings
Fig. 1 is a first structural diagram of an embodiment of the present application.
Fig. 2 is a first structural diagram of the housing in the embodiment of the present application.
Fig. 3 is a schematic structural diagram of a second embodiment of the present application.
Fig. 4 is a first structural diagram of the embodiment of the present application with the housing removed.
Fig. 5 is a second schematic structural diagram of the housing in the embodiment of the present application.
Fig. 6 is a second structural diagram illustrating the case removed in the embodiment of the present application.
In the figure: 1. a protector body; 11. a PTC chip; 12. a stationary contact; 2. a housing; 20. glue permeating grooves; 3. a sealing cover; 4. sandwiching an adhesive insulating paper; 5. a metal sheet; 51. a first metal piece; 52. a second metal piece; 53. and a movable contact.
Detailed Description
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the present invention will be briefly described below with reference to the drawings from one to six in the accompanying drawings and the description of the embodiments or the prior art, and it is obvious that the following description of the drawings is only some embodiments of the present invention, and that other drawings can be obtained by those skilled in the art without inventive efforts. It should be noted that the description of the embodiments is provided to help understanding of the present invention, but the present invention is not limited thereto.
The first embodiment is as follows: the embodiment provides a motor overload thermal protector, which comprises a protector body 1, wherein a PTC chip 11 is installed on the bottom surface of the protector body 1, a stationary contact 12 is arranged on the top surface of the protector body 1, the protector also comprises a shell 2, the shell 2 is installed on the protector body 1, a metal piece 5 is arranged on the inner side of the shell 2, a movable contact 53 is installed at one end of the metal piece 5, the stationary contact 12 is in contact with the movable contact 53, a lead output end is connected to the shell 2, and a lead input end is connected to the protector body 1; be fixed with doubling insulated paper 4 between protector body 1 and the casing 2 through glue, seted up the glue penetration recess 20 on the casing 2 to collect the glue that melts. When the protector works, external current is conducted to the fixed contact 12 through the protector body 1, current at the position of the fixed contact 12 is conducted to the movable contact 53, current at the movable contact 53 is conducted to the metal piece 5, current at the position of the metal piece 5 passes through the shell 2, and the current is transmitted out through the shell 2; when the temperature of the metal piece 5 is higher, the metal piece 5 is deformed in an upward bending way, so that the movable contact 53 moves to the side far away from the fixed contact 12, and the movable contact 53 and the fixed contact 12 are in non-contact; meanwhile, the glue used for bonding the laminated insulating paper 4 and the shell 2 melts due to overhigh temperature, and the melted glue flows into the glue seepage groove 20, so that the glue is prevented from overflowing.
In one embodiment, the glue penetration groove 20 is provided in plurality, and the plurality of glue penetration grooves 20 are parallel to each other.
Specifically, the glue permeation grooves 20 are distributed on the inner surface of the housing 2, and the extending direction of the plurality of glue permeation grooves 20 is consistent with the length direction of the housing 2.
In this embodiment, when the glue between the laminated insulating paper 4 and the housing 2 melts due to an excessive temperature, the plurality of glue-permeating grooves 20 can fully and redundantly contain the melted glue, thereby improving the adaptability.
In one embodiment, the cross section of the glue penetration groove 20 is triangular.
Specifically, the cross-sectional width of the glue penetration groove 20 gradually decreases from top to bottom.
In this embodiment, when the temperature of the housing 2 decreases, the temperature of the bottom of the glue-impregnated groove 20 can be quickly set.
In this embodiment, the distance between adjacent glue permeation grooves 20 is 1-3cm.
Specifically, the adjacent glue permeation grooves 20 can be selected to be 1cm, 2cm or 3cm.
In the embodiment, on one hand, the fixation firmness between the laminated insulating paper 4 and the shell 2 is facilitated; meanwhile, on the other hand, the bonding glue between the laminated insulating paper 4 and the shell 2 can flow into the glue seepage groove 20 conveniently.
Example two: the embodiment provides a motor overload thermal protector, which comprises a protector body 1, wherein a PTC chip 11 is installed on the bottom surface of the protector body 1, a stationary contact 12 is arranged on the top surface of the protector body 1, the protector also comprises a shell 2, the shell 2 is installed on the protector body 1, a metal piece 5 is arranged on the inner side of the shell 2, a movable contact 53 is installed at one end of the metal piece 5, the stationary contact 12 is in contact with the movable contact 53, a lead output end is connected to the shell 2, and a lead input end is connected to the protector body 1; be fixed with doubling insulated paper 4 between protector body 1 and the casing 2 through glue, seted up the glue penetration recess 20 on the casing 2 to collect the glue that melts. When the protector works, external current is conducted to the fixed contact 12 through the protector body 1, the current at the position of the fixed contact 12 is conducted to the movable contact 53, the current at the movable contact 53 is conducted to the metal piece 5, the current at the position of the metal piece 5 passes through the shell 2, and the current is transmitted out through the shell 2; when the temperature of the metal piece 5 is higher, the metal piece 5 is deformed by bending upwards, so that the movable contact 53 moves to the side far away from the fixed contact 12, and the movable contact 53 and the fixed contact 12 are in non-contact; meanwhile, the glue used for bonding the laminated insulating paper 4 and the shell 2 melts due to overhigh temperature, and the melted glue flows into the glue seepage groove 20, so that the glue is prevented from overflowing.
In one embodiment, the glue penetration groove 20 is provided in plurality, and the plurality of glue penetration grooves 20 are parallel to each other.
Specifically, the glue-penetrated grooves 20 are distributed on the inner surface of the housing 2, and the extending direction of the plurality of glue-penetrated grooves 20 is consistent with the length direction of the housing 2.
In this embodiment, when the glue between the laminated insulating paper 4 and the housing 2 melts due to an excessive temperature, the plurality of glue-permeating grooves 20 can fully and redundantly contain the melted glue, thereby improving the adaptability.
In one embodiment, the cross section of the glue penetration groove 20 is triangular.
Specifically, the cross-sectional width of the glue penetration groove 20 gradually decreases from top to bottom.
In this embodiment, when the temperature of the housing 2 decreases, the temperature of the bottom of the glue-impregnated groove 20 can be quickly set.
In this embodiment, the distance between adjacent glue permeation grooves 20 is 1-3cm.
Specifically, the adjacent glue permeation grooves 20 can be selected to be 1cm, 2cm or 3cm.
In the embodiment, on one hand, the firmness of fixation between the laminated insulating paper 4 and the shell 2 is facilitated; meanwhile, on the other hand, the bonding glue between the laminated insulating paper 4 and the shell 2 can flow into the glue seepage groove 20 conveniently.
In this embodiment, the protector body 1 is provided with a sealing cover 3 for sealing the PTC chip 11.
Specifically, the shape of the sealing cap 3 is adapted to the shape of the PTC chip 11, and covers the PTC chip 11.
In this embodiment, the sealing cover 3 is used for sealing the PTC chip 11, thereby achieving a better waterproof and dustproof effect.
In this embodiment, the metal member 5 includes a first metal member 51 and a second metal member 52, one end of the first metal member 51 is fixedly connected to the housing 2 through a bolt, and the other end of the first metal member 51 is fixedly connected to the second metal member 52 through welding.
Specifically, when the temperature of the second metal 52 increases, the second metal 52 rotates around the first metal 51.
In this embodiment, the second metal fitting 52 is deformed by a temperature increase and restored by a temperature decrease, thereby improving the sensitivity of the deformation of the metal fitting 5.
In this embodiment, the metal member 5 is a sloping plate.
Specifically, the metal piece 5 is inclined downward.
In this embodiment, a deformation space is provided for the deformation of the second metal piece 52.
In this embodiment, the movable contact 53 is fixed to the bottom end of the second metal piece 52 by a rivet, and the movable contact 53 abuts against the stationary contact 12.
Specifically, when the temperature is at the normal temperature, the movable contact 53 collides with the stationary contact 12, and the protector is in a connection state; when the temperature rises, the movable contact 53 is disconnected from the stationary contact 12, and the protector is in an open state.
In this embodiment, the sensitivity of the protector is improved.
In this embodiment, the cross-sectional shape of the laminated insulating paper 4 is a rectangular column having an opening.
Specifically, the open-ended effect is convenient for install doubling insulated paper 4 between protector body 1 and casing 2 to the fastness of installation.
In this embodiment, the firmness of fixing the laminated insulating paper 4 is improved.
(1) The current overload protection principle is as follows:
the current passes through 2 terminals of casing, sheetmetal 5 or auxiliary heating wire (link together with the bottom plate stationary contact), then forms the return circuit by bottom plate terminal connection electrical apparatus (like motor, transformer etc.), when the electrical apparatus current of taking place too big or the locked rotor current surpasss the trip value that the protector set for, the protector can be at the time cut-off power within the settlement, makes electrical apparatus obtain the protection.
(2) Temperature protection principle:
the current passes through the shell 2 terminal and the metal sheet 5, then the bottom plate terminal is connected with an electric appliance (such as a motor, a transformer and the like) to form a loop, when the electric appliance works abnormally and the ambient temperature is overhigh, the heat is transferred to the metal sheet 5 to reach the corrected trip temperature so that the electric contact is quickly disconnected and cut off a circuit, and when the temperature is reduced to the reset temperature, the metal sheet 5 is reset and quickly closes the electric contact to connect the circuit, so that the circulation action is continued.
Finally, it should be noted that: the above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, improvement, etc. within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. A motor overload thermal protector comprises a protector body (1), wherein a PTC chip (11) is installed on the bottom surface of the protector body (1), a stationary contact (12) is arranged on the top surface of the protector body (1), the motor overload thermal protector is characterized by further comprising a shell (2), the shell (2) is installed on the protector body (1), a metal piece (5) is arranged on the inner side of the shell (2), a movable contact (53) is installed at one end of the metal piece (5), the stationary contact (12) is in contact with the movable contact (53), a lead output end is connected to the shell (2), and a lead input end is connected to the protector body (1);
be fixed with doubling insulated paper (4) between protector body (1) and casing (2) through glue, set up oozing gluey recess (20) on casing (2) to collect the glue that melts.
2. An electric motor heat carrier protector according to claim 1, characterized in that said glue-permeable grooves (20) are provided in plurality, said glue-permeable grooves (20) being parallel to each other.
3. The overload thermal protector for electric motors according to claim 2, wherein the cross section of the glue-penetration groove (20) is triangular.
4. The overload heat protector for motor according to claim 3, characterized in that the glue-permeating grooves (20) are 1-3cm apart.
5. The overload thermal protector for motor according to claim 4, wherein the protector body (1) is provided with a sealing cover (3) for sealing the PTC chip (11).
6. An electric machine heat carrier protector according to claim 1, characterized in that the metal piece (5) comprises a first metal piece (51) and a second metal piece (52), the first metal piece (51) being connected to the housing (2) at one end and the first metal piece (51) being connected to the second metal piece (52) at the other end.
7. Electric machine overheating heat carrier protector according to claim 6, characterized in that said metal piece (5) is an inclined plate.
8. The overload heat protector for motor according to claim 7, wherein the moving contact (53) is fixed at the bottom end of the second metal piece (52), and the moving contact (53) is abutted with the fixed contact (12).
9. Motor overheating heat carrier protector according to claim 1, characterized in that the cross section of the laminated insulating paper (4) is in the shape of a rectangular cylinder with openings.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223296523.4U CN218631813U (en) | 2022-12-08 | 2022-12-08 | Motor overload heat protector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223296523.4U CN218631813U (en) | 2022-12-08 | 2022-12-08 | Motor overload heat protector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218631813U true CN218631813U (en) | 2023-03-14 |
Family
ID=85455257
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223296523.4U Active CN218631813U (en) | 2022-12-08 | 2022-12-08 | Motor overload heat protector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218631813U (en) |
-
2022
- 2022-12-08 CN CN202223296523.4U patent/CN218631813U/en active Active
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