CN213303999U - Thermal protector contact system - Google Patents
Thermal protector contact system Download PDFInfo
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- CN213303999U CN213303999U CN202022173149.3U CN202022173149U CN213303999U CN 213303999 U CN213303999 U CN 213303999U CN 202022173149 U CN202022173149 U CN 202022173149U CN 213303999 U CN213303999 U CN 213303999U
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- contact
- connecting piece
- thermal protector
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- transition connecting
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Abstract
The utility model relates to a thermal protector contact system, including stationary contact, transition connecting piece, movable contact, temperature sensing bimetallic strip, the movable contact is connected with temperature sensing bimetallic strip electricity, and the stationary contact is connected with transition connecting piece electricity, and the movable contact is provided with the coating that is used for strengthening electric conductivity with the stationary contact opposite face, characterized by: the contact point of the movable contact and the fixed contact is the thickest part of the coating. The transition connecting piece is provided with a static contact with inclination to connect the bulge, and the static contact is electrically connected with the transition connecting piece through the static contact to connect the bulge. The bottom surface of the static contact is fixed on the transition connecting piece, and an inclination is formed between the bottom surface of the static contact and the working surface of the static contact. The electric conduction device is simple and reasonable in structure, long in service life, strong in electric conduction performance and low in product cost.
Description
Technical Field
The present application relates to a thermal protector contact system with improved structure, belonging to a component in the motor thermal protector for protecting motor or other control circuit board from over-temp. rise and over-current.
Background
The static contact and the movable contact in the motor thermal protector are easy to generate instant heating and spark at the contact moment, so that the contact points are easy to generate oxidation and electrolysis in the multi-frequency process of use. In order to increase the frequency of use of the contact, increase its contact effect and increase the electrical conductivity of the contact, the contact working surface is coated with a silver layer, collectively referred to as silver contacts, the thicker the silver layer, the longer the life of the contact system and the more conductive the contact. Generally, the working surface of a static contact in a motor thermal protector is a plane, and the working surface of a moving contact is a spherical surface, so that the static contact and the moving contact are in point contact. The movable contact is manufactured by a cold heading compound process, and the movable contact manufactured by the cold heading compound process is characterized in that: the thickest part of the silver layer is at the highest point of the ball head surface of the movable contact.
Fig. 1 is a schematic diagram of a contact system of a conventional thermal protector, in which a stationary contact 1 'is fixedly connected to a transition connector 2', a moving contact 3 'is fixedly connected to a temperature-sensing bimetal 4', and the stationary contact 1 'and the moving contact 3' are matched to form the contact system of the thermal protector. Because the temperature sensing bimetallic strip 4 ' has a certain bending radian, the thickest part (the highest point of the ball head surface) a ' of the silver layer on the movable contact 3 ' in the prior art is not contacted with the working surface 1-1 ' of the fixed contact 1 '. Therefore, the utilization rate of the silver layer on the movable contact 3' in the existing contact system is low, and the design cost is wasted. In order to prolong the service life of the contact system, the thickness of the silver layer of the whole spherical surface of the movable contact can be increased, and the corresponding cost is increased.
Disclosure of Invention
The utility model provides an aim at overcome the above-mentioned not enough that exists among the prior art, and provide a structural design more reasonable, long service life, electric conductive property is strong, the low cost motor thermal protector contact system of product, it can cooperate with the shell of motor thermal protector, and the silver layer of make full use of contact system department improves the life-span of product, strengthens contact electric conductive property, practices thrift product cost.
The technical scheme adopted by the application for solving the technical problems is as follows: the utility model provides a thermal protector contact system, includes stationary contact, transition connecting piece, movable contact, temperature sensing bimetallic strip, and movable contact and temperature sensing bimetallic strip electricity are connected, and stationary contact and transition connecting piece electricity are connected, and movable contact and stationary contact opposite face are provided with the coating that is used for strengthening electric conductivity, characterized by: the contact point of the movable contact and the fixed contact is the thickest part of the coating.
The transition connecting piece is provided with a static contact connecting bulge with inclination, the static contact is electrically connected with the transition connecting piece through the static contact connecting bulge, the inclination angle of the static contact connecting bulge is generally 5-20 degrees, and after the static contact is welded with the transition connecting piece, the inclination angle of the working surface of the static contact and the upper and lower planes of the transition connecting piece is also 5-20 degrees.
Preferably, the bottom surface of the stationary contact is fixed on the transition piece, the bottom surface of the stationary contact and the working surface of the stationary contact have a slope, and the slope (included angle) between the bottom surface of the stationary contact and the working surface of the stationary contact is 5-20 degrees. The inclination angle of the working surface of the stationary contact and the upper and lower planes of the existing transition connecting piece is also 5-20 degrees.
The thermal protector contact system can also realize that the contact point of the movable contact and the fixed contact is the thickest part of the coating by other technical means, for example, the bending part is arranged on the temperature sensing bimetallic strip, so that the opposite contact point of the movable contact and the fixed contact is the thickest part of the coating, and the coating on the movable contact is fully utilized.
The coating described herein may also be applied to the entire moving contact head, e.g., only in a portion of the moving contact head, as long as the contact point between the moving contact and the stationary contact is the thickest coating.
The coating described herein is a silver layer.
And the intersection point of the central axis of the movable contact and the spherical surface of the coating is the contact point of the movable contact and the fixed contact.
The electric conduction device is simple and reasonable in structure, long in service life, strong in electric conduction performance and low in product cost.
Drawings
FIG. 1 is a schematic diagram of a prior art thermal protector contact system;
FIG. 2 is a schematic structural diagram of embodiment 1 of the present application;
FIG. 3 is a schematic view of a transition piece according to embodiment 1 of the present application;
FIG. 4 is a schematic structural diagram of embodiment 2 of the present application;
fig. 5 is a schematic view of a stationary contact in embodiment 2 of the present application.
Detailed Description
The present application will be described in further detail below with reference to the accompanying drawings by way of examples, which are illustrative of the present application and are not limited to the following examples.
Example 1:
referring to fig. 2 and 3, the contact system of the improved structure of the thermal protector for the motor of the present application is composed of a stationary contact 1, a transition connector 2, a movable contact 3 and a temperature sensing bimetallic strip 4; compared with the prior art, the static contact connecting bulge 2-1 is added on the transition connecting piece 2, and the static contact connecting bulge 2-1 has a certain inclination angle theta which is generally 5-20 degrees. The static contact 1 is fixedly connected to the static contact connecting bulge 2-1, a certain inclination is arranged on the working surface 1-1 of the static contact 1 and the bottom plane of the transition connecting piece 2, the inclination angle theta is generally 5 degrees to 20 degrees, after the thermal protector contact system is formed, the thickest part a of the coating 3-1 of the movable contact 3 (the position where the spherical surface of the coating 3-1 is farthest away from the other surface of the coating 3-1, namely the intersection point of the central axis of the movable contact 3 and the spherical surface of the coating 3-1 in the embodiment, the coating 3-1 for enhancing the electrical conductivity adopts a silver layer) is contacted with the working surface 1-1 of the static contact 1, and the thickest part a of the silver layer on the movable contact 3 is fully utilized to prolong the service life of the contact system, enhance the electrical conductivity and.
Example 2:
referring to fig. 4, which is a schematic view of the thermal protector contact system of embodiment 2 of the present application, the thermal protector contact system of the present application can be formed at an inclination angle of 5 ° to 20 ° and can also be disposed on the stationary contact 10; referring to fig. 5, in the stationary contact 10 according to embodiment 2 of the present application, the stationary contact 10 has a trapezoidal cross section, and the bottom surface 10-2 (the surface connected to the transition piece 2) of the stationary contact and the working surface 10-1 (the surface corresponding to the movable contact 3) of the stationary contact have a slope, which is typically 5 ° to 20 °. The bottom surface 10-2 of the static contact is fixedly connected to the transition piece 2, the inclination angle of the working surface 10-1 of the static contact and the upper and lower planes of the existing transition piece 2 is also 5-20 degrees, and the rest of the thermal protector contact system is consistent with that of the embodiment 1, has the same advantages and is not described one by one.
The thermal protector contact system can also realize that the contact point of the movable contact 3 and the fixed contact is the thickest part of the coating 3-1 by other technical means, for example, a bending part is arranged on the temperature sensing bimetallic strip 4, and the opposite contact point of the movable contact 3 and the fixed contact is the thickest part of the coating 3-1 by the bending part, so that the coating 3-1 on the movable contact 3 is fully utilized.
The coating 3-1 described herein may also not completely coat the entire moving contact 3 head (the portion facing the stationary contact), for example, only a certain portion of the moving contact 3 head, as long as the moving contact 3 contacts the stationary contact at the thickest point of the coating 3-1.
The above description is only illustrative of the structure of the present application; moreover, the names of the components of the present application may be different, and all equivalent or simple changes made according to the structure, characteristics and principles described in the present application are included in the protection scope of the present application.
Claims (7)
1. The utility model provides a thermal protector contact system, includes stationary contact, transition connecting piece, movable contact, temperature sensing bimetallic strip, and movable contact and temperature sensing bimetallic strip electricity are connected, and stationary contact and transition connecting piece electricity are connected, and movable contact and stationary contact opposite face are provided with the coating that is used for strengthening electric conductivity, characterized by: the contact point of the movable contact and the fixed contact is the thickest part of the coating.
2. A thermal protector contact system as set forth in claim 1 wherein: the transition connecting piece is provided with a static contact with inclination to connect the bulge, and the static contact is electrically connected with the transition connecting piece through the static contact to connect the bulge.
3. A thermal protector contact system as set forth in claim 2 further characterized by: the inclination angle of the static contact connecting bulge is between 5 and 20 degrees.
4. A thermal protector contact system as set forth in claim 1 wherein: the bottom surface of the static contact is fixed on the transition connecting piece, and an inclination is formed between the bottom surface of the static contact and the working surface of the static contact.
5. A thermal protector contact system as set forth in claim 4 wherein: the inclination between the bottom surface of the static contact and the working surface of the static contact is 5-20 degrees.
6. A thermal protector contact system as set forth in claim 1 wherein: the coating is a silver layer.
7. A thermal protector contact system according to claim 1 or 4, wherein: and the intersection point of the central axis of the movable contact and the spherical surface of the coating is the contact point of the movable contact and the fixed contact.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022173149.3U CN213303999U (en) | 2020-09-28 | 2020-09-28 | Thermal protector contact system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022173149.3U CN213303999U (en) | 2020-09-28 | 2020-09-28 | Thermal protector contact system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213303999U true CN213303999U (en) | 2021-05-28 |
Family
ID=76011380
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022173149.3U Active CN213303999U (en) | 2020-09-28 | 2020-09-28 | Thermal protector contact system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213303999U (en) |
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2020
- 2020-09-28 CN CN202022173149.3U patent/CN213303999U/en active Active
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