CN210897171U

CN210897171U - Overload protector

Info

Publication number: CN210897171U
Application number: CN201921336995.3U
Authority: CN
Inventors: 成明生; 陈宏�; 史叶萍; 鞠俊
Original assignee: JIANGSU CHANGSHENG ELECTRIC APPLIANCE CO Ltd
Current assignee: JIANGSU CHANGSHENG ELECTRIC APPLIANCE CO Ltd
Priority date: 2019-08-16
Filing date: 2019-08-16
Publication date: 2020-06-30
Anticipated expiration: 2029-08-16

Abstract

The utility model discloses an overload protector, which comprises a seat body, a first connecting sheet, a second connecting sheet and a blocking structure, wherein, a first connecting sheet, a second connecting sheet and a chute are arranged in the seat body side by side, the first connecting sheet is connected with one end of the temperature sensing element, the other end of the temperature sensing element is provided with a movable contact, one end of the second connecting sheet is provided with a fixed contact, the static contact is opposite to the movable contact, the blocking structure comprises a sliding seat which is arranged in the sliding groove in a sliding way and a return spring which drives the sliding seat, the sliding seat is provided with a blocking piece which is abutted against one side of the fixed contact and the movable contact in an initial state, the static contact and the movable contact are closed, the blocking piece moves between the static contact and the movable contact when the movable contact is overloaded, and the temperature sensing element drives the movable contact to be separated from the static contact. The overload protector provided by the utility model has small volume and manual reset function.

Description

Overload protector

Technical Field

The utility model relates to an overload protection device, concretely relates to overload protector.

Background

Most protectors are used at motors, electric tools such as ballasts, increase along with high-power electrical products, market is increasingly high to current overload's protect function demand, like water pump motor, garbage disposer and supply socket etc, it has reliability and validity to require protector protect function, because temperature-sensing element can be heated deformation when overcurrent overload protection for the protector, thereby with static contact disconnection, when the temperature reduces, the protector can automatic re-setting, protector installation space's requirement simultaneously, thereby it is relatively little to open the distance at design protector contact, lead to the protector life-span under the heavy current condition low, the security can not guarantee.

SUMMERY OF THE UTILITY MODEL

The utility model discloses a solve the problem of protector disconnection reliability among the prior art, the utility model provides an overload protection ware to satisfy market to the miniaturized demand of protector, satisfy the safety demand of high-power electrical products simultaneously.

The utility model adopts the technical proposal that:

an overload protector comprising:

the base body is internally provided with a first connecting sheet and a second connecting sheet side by side, and a sliding groove is arranged between the first connecting sheet and the second connecting sheet;

the temperature sensing device comprises a seat body, a first connecting piece, a second connecting piece and a temperature sensing element, wherein the seat body is provided with a seat body, the first connecting piece is connected with one end of the temperature sensing element, one end of the temperature sensing element is welded on the first connecting piece through a copper sheet, the other end of the temperature sensing element is provided with a movable contact, part of the first connecting piece is arranged outside the seat body, and the part of the first connecting piece arranged outside the seat body is of a downward bending structure;

one end of the second connecting piece is provided with a fixed contact which is opposite to the movable contact, part of the second connecting piece is arranged outside the seat body, and the part of the second connecting piece arranged outside the seat body is arranged into a downward bending structure;

the blocking structure comprises a sliding seat which is slidably installed in the sliding groove and a reset spring which drives the sliding seat, a blocking piece is arranged on the sliding seat, the fixed contact and the movable contact are closed under the action of a temperature sensing element in an initial state, the blocking piece is abutted against one side of the fixed contact and one side of the movable contact, the temperature sensing element drives the movable contact to be separated from the fixed contact when overload occurs, and the blocking piece moves down between the fixed contact and the movable contact under the action of the reset spring.

Further, the base body further comprises a first groove and a second groove, the first groove is used for placing the first connecting piece, and the second groove is used for placing the second connecting piece.

Further, the overload protector further comprises a threaded pipe and a nut connected with the threaded pipe, and one end of the sliding seat is inserted into the threaded pipe.

Further, a first end of the chute is provided with a positioning groove and an opening, the nut is placed in the positioning groove, and the opening supports the threaded pipe.

Furthermore, the first connecting sheet and the second connecting sheet are respectively provided with a through hole, and the through holes are fixed on the seat body through short rivets.

Furthermore, the material of the blocking sheet is phenolic resin or ceramic.

Furthermore, the overload protector further comprises an upper shell, the upper shell is connected with the base body, at least one raised positioning structure is arranged on the edge of the upper shell, a positioning hole is formed in the opposite position of the base body, and the positioning structure is inserted into the positioning hole.

Furthermore, the front ends of the first end parts of the first groove and the second groove are respectively provided with a through hole, the front end of the second end part of the sliding groove is provided with a through hole, the upper shell is provided with three through holes, the three through holes of the upper shell are respectively communicated with the three through holes of the seat body, and the upper shell is fixedly connected with the seat body through long rivets.

Compared with the prior art, the utility model discloses an intentional effect:

the utility model discloses a structure is blocked in the setting, should block the structure including the rupture disk, reset spring and portion that holds, when the circuit transships, temperature-sensing element is the thermal deformation, slightly lift up, the rupture disk no longer has the resistance this moment, reset spring drives and blocks between rupture disk motion to movable contact and the stationary contact, it needs to leave sufficient motion space for temperature-sensing element to have solved among the prior art, thereby lead to the great problem of product volume, this embodiment can effective open circuit through adopting the rupture disk, improve protector operational reliability, need not leave sufficient motion space for temperature-sensing element, can reduce the product volume.

Drawings

Fig. 1 is an exploded view of an overload protector according to an embodiment of the present invention;

fig. 2 is a perspective view of an overload protector according to an embodiment of the present invention;

fig. 3 is a cross-sectional view of an overload protector according to an embodiment of the present invention.

In the figure: the temperature-sensing device comprises a threaded pipe 1, a reset button 2, a temperature-sensing element 3, a long rivet 4, an upper shell 5, a movable contact 6, a fixed contact 7, a short rivet 8, a second connecting piece 9, a reset spring 10, a first connecting piece 11, a seat body 12 and a copper sheet 13.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

As shown in fig. 1, the overload protector provided by this embodiment includes a base 12, a first connecting piece 11, a temperature sensing element 3, a second connecting piece 9, and a blocking structure.

As a specific embodiment of the seat body 12 of this embodiment, as shown in fig. 1, the seat body 12 is provided with a first groove and a second groove side by side, the first connecting piece 11 is placed in the first groove, the second connecting piece 9 is placed in the second groove, a sliding groove is provided between the first groove and the second groove, and the blocking structure is provided in the sliding groove, and this embodiment provides that the volume of the overload protector is reduced by disposing the first connecting piece 11, the second connecting piece 9 and the blocking structure in the seat body 12.

Further, as shown in fig. 1, a first end of the sliding chute is provided with a positioning groove and an opening, and a front end of a second end of the sliding chute is provided with a through hole.

Further, as shown in fig. 1, at least one positioning opening is disposed on a side surface of the seat body 12.

Further, as shown in fig. 1 and fig. 2, the overload protector provided in this embodiment further includes an upper housing 5, the upper housing 5 is connected to the seat 12, a side surface of the upper housing 5 is provided with at least one positioning structure, the positioning structure is disposed at a position opposite to a positioning opening of the seat 12, and the positioning structure is inserted into the positioning opening to position the upper housing 5 and the seat 12.

Further, as shown in fig. 1 and fig. 2, the upper housing 5 is also provided with three through holes, the three through holes of the upper housing 5 are respectively communicated with the three through holes of the seat body 12, the long rivets 4 are inserted into the through holes to fixedly connect the upper housing 5 and the seat body 12 together, and a three-point fixed connection mode is adopted to ensure the stable connection of the upper seat body 12 and reduce the volume of the product.

As a specific example of the first connecting piece 11 of the present embodiment, as shown in fig. 1 and fig. 2, the first connecting piece 11 is connected to one end of the temperature sensing element 3, the other end of the temperature sensing element 3 is provided with the movable contact 6, a part of the first connecting piece 11 is disposed outside the housing 12, and a part of the first connecting piece 11 disposed outside the housing 12 is disposed in a downwardly bent structure.

Further, the first connecting piece 11 is provided with a projection structure to which one end of the temperature sensing element 3 is welded by a copper sheet 13, where the copper sheet 13 functions to assist welding and fix the temperature sensing element 3.

As a specific example of the second connecting piece 9 of this embodiment, one end of the second connecting piece 9 is provided with the fixed contact 7, the fixed contact 7 is opposite to the movable contact 6, a part of the second connecting piece 9 is disposed outside the seat body 12, and a part of the second connecting piece 9 disposed outside the seat body 12 is disposed in a downward bending structure.

As a specific embodiment of the blocking structure of this embodiment, the blocking structure includes a sliding seat slidably mounted in the sliding groove and a return spring for driving the sliding seat, a blocking piece is disposed on the sliding seat, in an initial state, the fixed contact 7 and the movable contact 6 are closed under the action of the temperature sensing element 3, the blocking piece abuts against one side of the fixed contact 7 and one side of the movable contact 6, the temperature sensing element 3 drives the movable contact 6 to separate from the fixed contact 7 during overload, and the blocking piece moves between the fixed contact 7 and the movable contact 6 under the action of the return spring. The circuit can be effectively disconnected by adopting the blocking sheet, and a sufficient movement space does not need to be reserved for the temperature sensing element 3, so that the volume of the product can be reduced.

Furthermore, the blocking sheet is made of phenolic resin or ceramic, so that disconnection of a circuit can be effectively guaranteed.

Further, the second connecting piece 9 is also provided with a protruding structure, the height of the protruding structure of the second connecting piece 9 is not lower than the height of the groove of the seat body 12, and preferably, the height of the protruding structure of the first connecting piece, the height of the protruding structure of the second connecting piece 9 and the height of the groove of the seat body 12 are the same.

Further, the first connecting piece 11 and the second connecting piece 9 are provided with at least one through hole, and the first connecting piece 11 and the second connecting piece 9 are respectively fixed on the seat body 12 through the insertion of the short rivet 8 into the through hole.

Further, the present embodiment further includes a threaded pipe 1 and a nut connected to the threaded pipe 1, one end of a sliding base is inserted into the threaded pipe 1, one end of the sliding base is configured as a reset button 2, the nut is placed in a positioning groove of a base 12, the threaded pipe 1 is supported by an opening of the base 12, when the circuit is overloaded, one end of the sliding base extends out of the threaded pipe 1, and the overload protector is reset by manually pushing one end of the sliding base to push the blocking piece to one side of the movable contact 6 and the stationary contact 7.

The utility model discloses a theory of operation:

under normal operation, the fixed contact 7 and the movable contact 6 are closed, the blocking piece is positioned at one side of the fixed contact 7 and the movable contact 6, the reset spring 10 is in a contracted state at the moment, when a circuit is overloaded or overflows, the temperature sensing element 3 is slightly lifted after being heated and deformed, and the blocking piece moves to a position between the fixed contact 7 and the movable contact 6 under the action of the force of the reset spring 10 at the moment to disconnect the circuit;

by pressing the reset button 2, the blocking piece is returned to one side of the fixed contact 7 and the movable contact 6, and the fixed contact 7 and the movable contact 6 are closed again.

To sum up, the utility model provides a protector not only can make the product more miniaturized, still has manual reset function simultaneously.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. An overload protector, comprising:

the seat body (12), a first connecting sheet (11) and a second connecting sheet (9) are arranged in the seat body (12) side by side, and a sliding groove is formed between the first connecting sheet (11) and the second connecting sheet (9);

the temperature sensing device comprises a first connecting piece (11), wherein the first connecting piece (11) is connected with one end of a temperature sensing element (3), one end of the temperature sensing element (3) is welded on the first connecting piece (11) through a copper sheet (13), the other end of the temperature sensing element (3) is provided with a movable contact (6), part of the first connecting piece (11) is arranged outside a seat body (12), and the part of the first connecting piece (11) arranged outside the seat body (12) is of a downward bending structure;

a fixed contact (7) is arranged at one end of the second connecting piece (9), the fixed contact (7) is opposite to the movable contact (6), part of the second connecting piece (9) is arranged outside the base body (12), and the part of the second connecting piece (9) arranged outside the base body (12) is arranged in a downward bending structure;

the blocking structure comprises a sliding seat and a reset spring (10), the sliding seat is slidably mounted in the sliding groove, the reset spring drives the sliding seat, a blocking piece is arranged on the sliding seat, in an initial state, the fixed contact (7) and the movable contact (6) are closed under the action of the temperature sensing element (3), the blocking piece abuts against one side of the fixed contact (7) and one side of the movable contact (6), the temperature sensing element (3) drives the movable contact (6) to be separated from the fixed contact (7) during overload, and the blocking piece moves between the fixed contact (7) and the movable contact (6) under the action of the reset spring (10).

2. An overload protector according to claim 1, characterised in that the seat (12) further comprises a first recess for receiving the first connecting tab (11) and a second recess for receiving the second connecting tab (9).

3. An overload protector according to claim 2, characterised by further comprising a threaded tube (1) and a nut connected to the threaded tube (1), the slide having one end inserted into the threaded tube (1).

4. An overload protector according to claim 3, characterised in that the first end of the chute is provided with a positioning slot in which the nut is placed and an opening which supports the threaded tube (1).

5. An overload protector according to claim 2, characterised in that the first (11) and second (9) lugs are each provided with a through hole which is secured to the body (12) by a blind rivet (8).

6. An overload protector according to claim 1, wherein the blocking member is made of phenolic resin or ceramic.

7. An overload protector according to claim 2, further comprising an upper housing (5), wherein the upper housing (5) is connected to the base (12), at least one raised positioning structure is provided at the edge of the upper housing (5), and at least one positioning hole is provided at the side of the base (12), and the positioning structure is inserted into the positioning hole.

8. An overload protector according to claim 7 in which the first ends of the first and second recesses are each provided with a through hole, the second ends of the chutes are each provided with a through hole, the upper housing (5) is provided with three through holes, the three through holes of the upper housing (5) are each in communication with three through holes of the base (12), and the upper housing (5) is fixedly connected to the base (12) by means of the long rivets (4).