Thermal overload relay

Abstract

The utility model provides a thermal overload relay which comprises a thermal overload relay body, the thermal overload relay body further comprises a shell, a connecting groove is formed in the bottom of the shell in a front-back penetrating mode, first clamping grooves are formed in the two sides of the front portion of the connecting groove, second clamping grooves are formed in the two sides of the rear portion of the connecting groove, and a fixing base is arranged on the front portion of the connecting groove. A mechanical cavity is formed in the shell, a movable spring assembly is arranged on one side of the top of the mechanical cavity, a static spring assembly is arranged on one side of the bottom of the mechanical cavity, a mounting plate is arranged at the other bottom of the mechanical cavity, and a reset push rod is movably arranged on the mounting plate. And an elastic piece II is arranged on the reset push rod. According to the utility model, when the thermal overload relay and the AC contactor are fixed, screws and other external fasteners are not needed, so that the assembly and disassembly are very convenient, and the thermal overload relay is reset by manually pressing the reset push rod, so that the operation is simpler and more convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of relays, and particularly relates to a thermal overload relay. Background Art

[0002] The thermal overload relay is an important device for protecting motors from overload. When it is connected to the main circuit, it will conduct the same current as the motor. If the motor is overloaded to a certain extent, the thermal element will be heated and bent to a certain degree, and then push the action structure of the thermal relay to prevent the motor from being damaged due to overload.

[0003] The thermal overload relay is usually connected and used in cooperation with an AC contactor. The existing thermal overload relay is usually fixed to the AC contactor by screws or other fasteners, and corresponding tools are required for both assembly and disassembly, resulting in cumbersome and inconvenient assembly and disassembly, and affecting the efficiency of assembly and disassembly; and when the existing thermal overload relay is reset, a screwdriver is usually required to turn the reset knob to complete the reset of the thermal overload relay, resulting in cumbersome and inconvenient operation for the staff. Summary of the Utility Model

[0004] The utility model aims to provide a thermal overload relay to solve the problems raised in the above background art.

[0005] To achieve the above object, the utility model provides the following technical solutions:

[0006] A thermal overload relay includes a thermal overload relay body, and the thermal overload relay body further includes a housing. A connection groove is provided through the front and back of the bottom of the housing. On both sides of the front part of the connection groove, there are first clamping grooves, and on both sides of the rear part of the connection groove, there are second clamping grooves. A fixing seat is provided at the front part of the connection groove. An installation groove is provided in the fixing seat. A limiting buckle is movably arranged in the installation groove. A first elastic member is provided in the installation groove. A mechanical cavity is provided inside the housing. A moving spring assembly is provided on one side of the top of the mechanical cavity. A static spring assembly is provided on one side of the bottom of the mechanical cavity. Another bottom of the mechanical cavity is provided with a mounting plate. A reset push rod is movably arranged on the mounting plate. A second elastic member is provided on the reset push rod.

[0007] Preferably, the limiting buckle is provided with a lever. At the bottom of the end of the limiting buckle away from the lever, there is a clamping buckle. Both sides of the limiting buckle are hinged to the two side walls of the installation groove respectively.

[0008] Preferably, the moving spring assembly includes a moving spring piece, and a moving contact is provided on the moving spring piece. The static spring assembly includes a static spring piece, and a static contact is provided on the static spring piece. The moving contact and the static contact are opposite in position, and the reset push rod and the moving contact are opposite in position.

[0009] Preferably, both ends of the first elastic member are respectively abutted against the installation groove and the limit buckle.

[0010] Preferably, both ends of the second elastic member are respectively abutted against the installation plate and the reset push rod.

[0011] Preferably, a through hole is provided on one side wall of the mechanical cavity, a reset button is provided at one end of the reset push rod, and the reset button extends out of the mechanical cavity through the through hole. Beneficial effects

[0012] One or more of the above technical solutions in the thermal overload relay provided by the embodiment of the present invention at least have one of the following technical effects:

[0013] Through the above technical solution of the present invention, the thermal overload relay body is clamped with the clamping plate on the AC contactor through the first clamping groove and the second clamping groove in the connection groove, and is clamped with the groove on the AC contactor through the buckle on the limit buckle. Thus, the thermal overload relay body and the AC contactor are fixed by a clamping method, so that when fixing the thermal overload relay and the AC contactor, there is no need to use screws and other external fasteners, nor corresponding disassembly and assembly tools. Furthermore, the assembly and disassembly are very convenient. And by manually pressing the reset button, the reset push rod pushes the moving contact, so that the moving contact and the static contact are closed to complete the reset, solving the problem that the existing thermal overload relay needs to use tools to adjust the reset knob, resulting in cumbersome and inconvenient operation. Furthermore, the operation is made simpler and more convenient. Description of the drawings

[0014] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0015] Figure 2 It is a schematic diagram of the internal structure of the mechanical cavity of the present invention;

[0016] Figure 3 It is a schematic diagram of the connection groove structure of the present invention;

[0017] Figure 4 It is a schematic diagram of the AC contactor structure of the present invention;

[0018] Figure 5 It is a schematic diagram of the assembled state structure of the present invention;

[0019] The corresponding relationship between the reference numerals in the drawings and the component names is as follows:

[0020] 1. Thermal overload relay body; 2. Housing; 3. Connecting groove; 4. First clamping groove; 5. Second clamping groove; 6. Fixed seat; 7. Installation groove; 8. Limit buckle; 9. First elastic member; 10. Mechanical cavity; 11. Moving reed assembly; 12. Static reed assembly; 13. Mounting plate; 14. Reset push rod; 15. Second elastic member; 16. Poking rod; 17. Snap; 18. Moving reed; 19. Moving contact; 20. Static reed; 21. Static contact; 22. Reset button. Detailed implementation manners

[0021] The technical solutions of the present utility model will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are some but not all of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without making creative efforts shall fall within the protection scope of the present utility model.

[0022] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by terms such as "upper", "lower", "left", "right", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present utility model.

[0023] In the description of the present utility model, it should also be noted that unless otherwise clearly defined and limited, the terms "set", "install", "connect", and "couple" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal communication of two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0024] As Figures 1-5 shown, it is a structural schematic diagram of a thermal overload relay according to a preferred embodiment of the present utility model;

[0025] In this embodiment, a thermal overload relay body 1 is included, and the thermal overload relay body 1 also includes a shell 2. A connecting groove 3 is provided at the bottom of the shell 2. A card slot 1 4 is provided on both sides of the front of the connecting groove 3. A card slot 2 5 is provided on both sides of the rear of the connecting groove 3. The card slot 1 4 and the card slot 2 5 are used in conjunction with the card plate on the AC contactor. A fixing seat 6 is fixedly provided at the front of the connecting groove 3. An installation groove 7 is provided in the fixing seat 6. A limit buckle 8 is movably provided in the installation groove 7. The limit buckle 8 cooperates with the AC contactor. The groove on the mounting groove is used, an elastic member 9 is provided in the mounting groove 7, and the elastic member 9 adopts a spring. A mechanical cavity 10 is provided inside the shell 2, and a dynamic spring assembly 11 is provided on one side of the top of the mechanical cavity 10, and a static spring assembly 12 is provided on one side of the bottom of the mechanical cavity 10. A mounting plate 13 is provided at the other bottom of the mechanical cavity 10, and a reset push rod 14 is movably provided on the mounting plate 13, and the reset push rod 14 can slide laterally on the mounting plate 13, and an elastic member 2 15 is sleeved on the reset push rod 14, and the elastic member 2 15 adopts a spring.

[0026] In this embodiment, the limit buckle 8 is provided with a lever 16, and a buckle 17 is provided at the bottom of one end of the limit buckle 8 away from the lever 16. The two sides of the limit buckle 8 are respectively hinged to the two side walls of the installation groove 7, and the limit buckle 8 can be rotated in the installation groove 7 by moving the lever 16.

[0027] In this embodiment, the movable spring assembly 11 includes a movable spring sheet 18, on which a movable contact 19 is provided, and the static spring assembly 12 includes a static spring sheet 20, on which a static contact 21 is provided, and the movable contact 19 is positioned opposite to the static contact 21, and the reset push rod 14 is positioned opposite to the movable contact 19. By pushing the reset push rod 14, the reset push rod 14 pushes the movable contact 19, so that the movable contact 19 and the static contact 21 are closed.

[0028] In this embodiment, the two ends of the elastic member 9 are respectively abutted against the mounting groove 7 and the limit buckle 8, and the elastic member 9 provides elastic force for the limit buckle 8, so that the buckle 17 on the limit buckle 8 is engaged with the groove on the AC contactor and maintained.

[0029] In this embodiment, two ends of the second elastic member 15 respectively abut against the mounting plate 13 and the reset push rod 14 , and the second elastic member 15 provides elastic force for the reset push rod 14 , so that the reset push rod 14 is reset.

[0030] In this embodiment, a through hole is provided on one side wall of the mechanical cavity 10 , and a reset button 22 is provided at one end of the reset push rod 14 . The reset button 22 passes through the through hole and extends out of the mechanical cavity 10 . The staff pushes the reset push rod 14 by pressing the reset button 22 .

[0031] Principle of the utility model:

[0032] During installation, the thermal overload relay body 1 is connected to the card plate on the AC contactor through the card slot 1 4 and the card slot 2 5 in the connecting slot 3, and is connected to the groove on the AC contactor through the card buckle 17 on the limit buckle 8, so that the thermal overload relay body 1 and the AC contactor are fixed by the card connection. During disassembly, the limit buckle 8 is rotated by toggling the toggle lever, and the card buckle 17 is disengaged from the groove on the AC contactor, and the card slot 1 4 and the card slot 2 5 are separated from the card plate on the AC contactor, and the disassembly is completed; the staff manually presses the reset button 22, so that the reset push rod 14 pushes the moving contact 19, so that the moving contact 19 and the static contact 21 are closed to complete the reset,

[0033] The thermal overload relay of the utility model has a mounting method, a connection method or a setting method which are all common mechanical methods and can be implemented as long as the beneficial effects can be achieved.

[0034] Technologies not described in detail in the present invention are all well-known technologies. Those skilled in the art can easily implement the present invention based on understanding this specification, and the contents shown in the drawings are part of this specification.

[0035] The above content is a further detailed description of the utility model in combination with specific implementation methods. It cannot be determined that the specific implementation of the utility model is limited to these descriptions. For ordinary technicians in the technical field to which the utility model belongs, without departing from the concept of the utility model, they can also make several simple deductions or substitutions, which should be regarded as belonging to the scope of protection determined by the claims submitted for the utility model.

Claims

1. A thermal overload relay, comprising a thermal overload relay body (1), characterized in that: The thermal overload relay body (1) also includes a housing (2), a connecting groove (3) penetrating the bottom of the housing (2) from front to back, a first clamping groove (4) being provided on both sides of the front of the connecting groove (3), a second clamping groove (5) being provided on both sides of the rear of the connecting groove (3), a fixing seat (6) being provided at the front of the connecting groove (3), a mounting groove (7) being provided in the fixing seat (6), a limit buckle (8) being movably provided in the mounting groove (7), an elastic member (9) being provided in the mounting groove (7), a mechanical cavity (10) being provided inside the housing (2), a movable spring assembly (11) being provided on one side of the top of the mechanical cavity (10), a static spring assembly (12) being provided on one side of the bottom of the mechanical cavity (10), a mounting plate (13) being provided at the other bottom of the mechanical cavity (10), a reset push rod (14) being movably provided on the mounting plate (13), and a second elastic member (15) being provided on the reset push rod (14).

2. A thermal overload relay according to claim 1, characterized in that: The limiting buckle (8) is provided with a lever (16), and a buckle (17) is provided at the bottom of one end of the limiting buckle (8) away from the lever (16), and two sides of the limiting buckle (8) are respectively hinged to two side walls of the installation groove (7).

3. A thermal overload relay according to claim 1, characterized in that: The movable spring assembly (11) comprises a movable spring sheet (18), on which a movable contact (19) is provided; the static spring assembly (12) comprises a static spring sheet (20), on which a static contact (21) is provided; the movable contact (19) and the static contact (21) are located opposite to each other; and the reset push rod (14) and the movable contact (19) are located opposite to each other.

4. A thermal overload relay according to claim 1, characterized in that: The two ends of the elastic member 1 (9) are respectively abutted against the mounting groove (7) and the limiting buckle (8).

5. A thermal overload relay according to claim 1, characterized in that: The two ends of the second elastic member (15) are respectively abutted against the mounting plate (13) and the reset push rod (14).

6. A thermal overload relay according to claim 1, characterized in that: A through hole is provided on one side wall of the mechanical cavity (10), and a reset button (22) is provided at one end of the reset push rod (14); the reset button (22) passes through the through hole and extends out of the mechanical cavity (10).

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