CN213242454U - Stable temperature and current double-protection protector - Google Patents

Abstract

The utility model belongs to the technical field of the sensitive components and parts of motor protection, in particular to protector of two protections of stable form temperature current, which comprises a fixing plate, bimetallic element subassembly (welding has the movable contact), the static contact, insulating seat, the fixed plate downward cooperation is installed on insulating seat, and exist the cavity between the insulating seat, be equipped with bimetallic element subassembly (welding has the movable contact) and static contact in the cavity, be formed with supplementary solder joint by left department downward arch under the fixed plate on the face, bimetallic element upwards welds on supplementary solder joint by the part of left end, the vertical outer terminal surface that corresponds supplementary solder joint on the insulating seat inwards caves in and forms the recess that is used for holding supplementary solder joint.

Description

Stable temperature and current double-protection protector

Technical Field

The utility model belongs to the technical field of the sensitive components and parts of motor protection, in particular to protector of two protections of stable form temperature current.

Background

The protector is used on overcurrent and overheat protection of the motor, and basically comprises a fixed plate, a bimetallic strip, a static contact and an insulating seat, wherein one end of the bimetallic strip is upwards welded on the fixed plate, the other end of the bimetallic strip is welded with a movable contact, the insulating seat is fixedly provided with the static contact, one end of the static contact is a static contact, and when the protector is in normal operation, the movable contact and the static contact are in fit contact and abutted. The stable installation between fixed plate and the insulator housing is very important to the normal steady operation of protector.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, the utility model provides a stable temperature and current double-protection protector, which comprises a fixed plate, a double metal plate component, a static contact plate and an insulating seat, wherein the fixed plate is downwards arranged on the insulating seat in a matching way, a cavity is arranged between the fixed plate and the insulating seat,

a bimetallic strip assembly and a static contact piece are arranged in the cavity, an auxiliary welding spot is formed on the lower plate surface of the fixed plate by protruding downwards towards the left, the auxiliary welding spot and the fixed plate are integrally formed, the bimetallic strip assembly comprises a bimetallic strip and a movable contact welded on the lower plate surface of the bimetallic strip by welding towards the right, the part of the bimetallic strip close to the left end is welded on the auxiliary welding spot upwards, a static contact matched with the movable contact is arranged on the upper plate surface of the static contact piece by welding towards the left,

the insulating seat is a boat-shaped structure, and the vertical outer end face corresponding to the auxiliary welding point on the insulating seat is inwards sunken to form a groove for accommodating the auxiliary welding point.

Preferably, the method comprises the following steps: the front edge and the rear edge of the fixed plate respectively extend outwards to form extending parts which are integrally formed with the fixed plate, the bottom of the insulating base is provided with embedding grooves which are formed by inward sinking and correspond to the extending parts, and the parts of the extending parts, which are far away from the fixed plate, are matched and embedded into the corresponding embedding grooves, so that the fixed plate is downwards buckled and installed on the insulating base;

preferably, the method comprises the following steps: the static contact piece is fixedly arranged on the insulating seat, and one end, far away from the static contact, of the static contact piece penetrates through the insulating seat;

preferably, the method comprises the following steps: the static contact is bent into a ladder shape, and the bent part on the static contact is positioned inside the insulating seat body.

Drawings

Figure 1 is a schematic view of the external structure of the present invention,

figure 2 is a schematic view of the bottom structure of figure 1,

figure 3 is a schematic view (front view) of the internal structure of the present invention,

figure 4 is a cross-sectional view a-a (left view) of figure 3,

wherein, 1-fixed plate, 11-auxiliary welding spot, 12-extension, 2-bimetal, 21-moving contact, 3-static contact, 31-static contact, 4-insulating seat, 41-groove, 42-caulking groove, 43-cavity.

Detailed Description

It should be noted that the words "front", "rear", "left" and "right" used in the description of the present invention refer to the directions in fig. 3, and "inner" and "outer" refer to the directions toward and away from the geometric center of a particular component (e.g., "insulator") respectively, which are for convenience of description and simplicity of description only, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and therefore should not be construed as limiting the present invention.

As shown in the attached drawings, the stable temperature and current double-protection protector of the utility model comprises a fixed plate 1, a bimetallic strip component, a static contact piece 3 and an insulating seat 4,

insulating seat 4 is the ship shape structure, respectively on the leading edge of fixed plate 1 and the back edge outwards extend with fixed plate 1 extension 12 as integrated into one piece, insulating seat 4 bottom corresponds respectively and is equipped with the caulking groove 42 that inwards caves in and forms to each extension 12, through keeping away from on each extension 12 the part (playing the effect similar to the jack catch) cooperation of fixed plate 1 and imbed in the caulking groove 42 that corresponds, realize fixed plate 1 simultaneously from both sides fastening downwards on insulating seat 4 around, the cooperation installation between fixed plate 1 and the insulating seat 4 promptly. Because the insulating base 4 is of a boat-shaped structure, a cavity 43 is formed between the fixing plate 1 and the insulating base 4,

a bimetallic strip assembly and a static contact 3 are arranged in the cavity 43, an auxiliary welding point 11 is formed by downward protrusion of the left part of the lower plate surface of the fixed plate 1, the auxiliary welding point 11 and the fixed plate 1 are integrally formed, the bimetallic strip assembly comprises an arc bimetallic strip 2 and a movable contact 21 welded on the right part of the lower plate surface of the bimetallic strip 2 (when the fixed plate 1 is fastened on the insulating base 4 downwards, the right part of the bimetallic strip 2 can enter the cavity 43 and deform in the cavity 43 based on the temperature change of the bimetallic strip to control the on-off of current, as shown in figure 3), the part of the bimetallic strip 2 close to the left end is welded on the auxiliary welding point 11 upwards, so that the bimetallic strip 2 with originally smooth surface is also protruded downwards to a certain degree at the welding position, the vertical outer end surface corresponding to the auxiliary welding point 11 (or the downward protrusion formed on the bimetallic strip 2 based on the auxiliary welding point 11) on the insulating base 4 is sunken inwards to form a groove 41 for accommodating the,

the left part of the upper surface of the static contact 3 is provided with a static contact 31 which is in matched contact with the movable contact 21, the static contact 3 is fixedly arranged on the insulating seat 4 (the static contact 3 and the insulating seat 4 are cast into a whole), one end of the static contact 3, which is far away from the static contact 31, penetrates through the insulating seat 4, the static contact 3 is in a bent step shape, and the bent part of the static contact 3 is positioned in the insulating seat 4 body so as to increase the effective insulation length. In addition, a conducting wire is connected to one end of the static contact piece 3 penetrating through the insulating seat 4, and a conducting wire (not shown in the figure) is also connected to one end of the fixed plate 1 far away from the auxiliary welding point 11, so that a conducting loop is formed among the fixed plate 1, the bimetallic strip 2, the movable contact 21, the static contact 31 and the static contact piece 3.

Based on the auxiliary welding points 11 on the fixing plate 1, the bimetallic strip 2 is favorably and stably welded on the fixing plate 1; after the fixing plate 1 is fastened on the insulating base 4 downwards through the extension part 12, the end part of the extension part 12 far away from the fixing plate 1 is embedded into the corresponding embedding groove 42 in a matching way, so that the fixing plate 1 is prevented from sliding horizontally relative to the insulating base 4, and the assembly is more stable; through set up inside sunken recess 41 on the corresponding outer terminal surface of insulator 4, make the downward bellying that forms based on supplementary solder joint 11 on the bimetallic strip 2 that goes on the welding, can wholly get into in this recess 41, consequently the existence of this bellying can not form the hindrance to the stable cooperation installation between fixed plate 1 and the insulator 4, is favorable to the reliability and the security of product.

Claims (4)

1. The utility model provides a two protectors of protection of stable form temperature current which characterized in that: the protector comprises a fixed plate (1), a bimetallic strip assembly, a static contact piece (3) and an insulating seat (4), wherein the fixed plate (1) is downwards installed on the insulating seat (4) in a matched manner, a cavity is formed between the fixed plate and the insulating seat (4),

the cavity is internally provided with the bimetallic strip assembly and the static contact piece (3), an auxiliary welding point (11) is formed at the position, close to the left, of the lower plate surface of the fixed plate (1) in a downward protruding mode, the bimetallic strip assembly comprises a bimetallic strip (2) and a movable contact (21) welded to the position, close to the right, of the lower plate surface of the bimetallic strip (2), the part, close to the left end, of the bimetallic strip (2) is upwards welded to the auxiliary welding point (11), a static contact (31) matched with the movable contact (21) is arranged at the position, close to the left, of the upper plate surface of the static contact piece (3),

and the vertical outer end surface of the insulating seat (4) corresponding to the auxiliary welding point (11) is inwards sunken to form a groove (41) for accommodating the auxiliary welding point (11).

2. A stabilized temperature-current double protection protector according to claim 1 wherein: the front edge and the rear edge of the fixing plate (1) respectively extend outwards to form extension parts (12), caulking grooves (42) formed by inward recession are formed in the bottom of the insulating seat (4) and correspond to the extension parts (12), and the portions, far away from the fixing plate (1), of the extension parts (12) are matched and embedded into the corresponding caulking grooves (42), so that the fixing plate (1) is fastened on the insulating seat (4) downwards.

3. A stabilized temperature-current double protection protector according to claim 1 wherein: the static contact piece (3) is fixedly arranged on the insulating seat (4), and one end, far away from the static contact (31), of the static contact piece (3) penetrates through the insulating seat (4).

4. A stabilized temperature-current double protection protector according to claim 3 wherein: the static contact piece (3) is bent into a step shape, and the bent part on the static contact piece (3) is positioned in the insulating seat (4) body.

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