Thermal overload relay convenient to connect

Abstract

The utility model discloses a thermal overload relay convenient to connect, which comprises a thermal overload relay body, a plurality of wiring terminals are arranged at two ends of the thermal overload relay body, and the wiring terminals are provided with conductive plates. A first fixing part and a second fixing part which are step-shaped are arranged at the upper part and the lower part of each current-conducting plate, fastening screws are arranged on the first fixing part and the second fixing part, a plurality of heat dissipation fins are arranged on the back surface of each current-conducting plate at equal intervals, a base is arranged at the bottom of each current-conducting plate, and a partition plate is arranged on each base and is arranged between the current-conducting plates. Through the step-shaped first fixing part and the step-shaped second fixing part, the positions of the copper noses fixed on the first fixing part and the second fixing part are in an up-and-down staggered relation, the two copper noses are prevented from interfering with each other, heat of the current-conducting plate is absorbed through the heat dissipation fins, temperature rise of the current-conducting plate is controlled, and heat dissipation efficiency is improved. The product has the advantages of interference prevention and temperature rise control.

Description

Technical Field

[0001] The utility model relates to the technical field of thermal overload relays, in particular to a thermal overload relay which is easy to connect. Background Art

[0002] Thermal overload relay is an overload relay that uses the principle of thermal effect of electric current and uses electrical thermistor bimetallic strip as sensitive element, also known as thermal relay.

[0003] In order to increase the convenience of wire connection, copper noses are usually fixed at both ends of the wire, and electrically connected to the terminal of the thermal overload relay through the copper noses. The connection method through the copper noses also increases the contact area with the terminal, reduces the heat generation and contact resistance. However, when the copper nose is large, it cannot be installed smoothly, and when two copper noses are installed at a single terminal, the later installed copper nose will be installed in a bent posture, which will reduce the contact area between the copper nose and the terminal. Therefore, the applicant has made a beneficial design and found a solution to the above problem. The technical solution to be introduced below is produced in this context. Summary of the invention

[0004] The purpose of the utility model is to overcome the shortcomings of the above-mentioned traditional thermal overload relay design and provide a product that prevents interference and controls temperature rise.

[0005] To solve the above problems, the utility model adopts the following technical solutions.

[0006] A thermal overload relay that is easy to connect comprises a thermal overload relay body, a plurality of wiring terminals are arranged at both ends of the thermal overload relay body, the wiring terminals are provided with a conductive plate, a stepped first fixing portion and a second fixing portion are arranged at the upper and lower parts of the conductive plate, the first fixing portion and the second fixing portion are provided with fastening screws, a plurality of heat dissipation fins with equal spacing are arranged on the back of the conductive plate, a base is arranged at the bottom of the conductive plate, a partition is arranged between the conductive plates, and both sides of the partition are provided with a clearance groove.

[0007] Preferably, the conductive plate is provided with an extension portion, the extension portion is connected and fixed to the wiring terminal, and a mounting hole is provided at the bottom of the conductive plate.

[0008] Preferably, the base is provided with a ventilation hole and is arranged at the entrance of the heat dissipation fins, the base is provided with a positioning hole, the positioning hole is provided with a countersunk hole, the positioning hole is provided with a screw and is threadedly connected to the mounting hole, and the head of the screw is arranged in the countersunk hole.

[0009] Preferably, the first fixing portion and the second fixing portion are provided with threaded holes.

[0010] Preferably, the fastening screw is threadedly connected to the threaded hole, and the screw rod of the fastening screw is successively provided with a spring washer and a gasket.

[0011] Beneficial effects:

[0012] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0013] (1) In the present utility model, through the stepped first fixing portion and second fixing portion, the positions of the copper lugs fixed on the first fixing portion and the second fixing portion are in an up-and-down dislocation relationship, preventing interference between the two copper lugs, and increasing the contact area between the fastening screw and the copper lug, thereby overcoming the problems raised in the background art and making the product have the advantage of anti-interference.

[0014] (2) In the present utility model, the heat dissipation fins absorb the heat of the conductive plate and increase the surface area in contact with the air, thereby controlling the temperature rise of the conductive plate, and further reducing the temperature rise of the copper lug, making the product have the advantage of controlling the temperature rise. Description of the drawings

[0015] Figure 1 is a schematic structural view of a thermal overload relay for easy connection according to the present utility model Figure 1 ;

[0016] Figure 2 is a schematic structural view of a thermal overload relay for easy connection according to the present utility model Figure 2 ;

[0017] Figure 3 is an exploded view of a thermal overload relay for easy connection according to the present utility model Figure 1 ;

[0018] Figure 4 is an exploded view of a thermal overload relay for easy connection according to the present utility model Figure 2 ;

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

[0020] Reference numerals: 1, thermal overload relay body; 2, conductive plate; 3, fastening screw; 4, base; 5, screw; 11, terminal; 21, first fixing portion; 22, second fixing portion; 23, heat dissipation fin; 24, extension portion; 25, mounting hole; 26, threaded hole; 31, spring washer; 32, gasket; 41, partition; 42, relief groove; 43, ventilation hole; 44, positioning hole; 45, counterbore. Detailed implementation manners

[0021] The technical solution of the utility model will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by the terms "up", "down", "left" and "right" are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0023] In the embodiment of the present invention, "and / or" is only a description of the association relationship of the associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0024] Reference example Figures 1 to 4 , a thermal overload relay that is easy to connect, including a thermal overload relay body 1, a plurality of wiring terminals 11 are provided at both ends of the thermal overload relay body 1, the wiring terminals 11 are provided with a conductive plate 2, a stepped first fixing portion 21 and a second fixing portion 22 are provided at the upper and lower parts of the conductive plate 2, the first fixing portion 21 and the second fixing portion 22 are provided with fastening screws 3, a plurality of heat dissipation fins 23 with equal intervals are provided on the back of the conductive plate 2, a base 4 is provided at the bottom of the conductive plate 2, the base 4 is provided with a partition 41, and is arranged between the conductive plates 2, and both sides of the partition 41 are provided with a clearance groove 42, through the stepped first fixing portion 21 and the second fixing portion 22, the copper noses fixed on the first fixing portion 21 and the second fixing portion 22 are in an upper and lower dislocation relationship, so as to prevent the two copper noses from interfering with each other, and increase the contact area between the fastening screw 3 and the copper nose; the heat of the conductive plate 2 is absorbed by the heat dissipation fins 23, and the surface area with the air is increased, so as to control the temperature rise of the conductive plate 2, and then reduce the temperature rise of the copper nose;

[0025] It is worth mentioning that the conductive plate 2 is provided with an extension portion 24, which is connected and fixed to the wiring terminal 11, and a mounting hole 25 is provided at the bottom of the conductive plate 2, which is used in conjunction with the base 4;

[0026] It is worth mentioning that the base 4 is provided with ventilation holes 43, which are arranged at the entrance of the heat dissipation fins 23. The base 4 is provided with positioning holes 44, and the positioning holes 44 are provided with counterbores 45. The positioning holes 44 are provided with screws 5, which are threadedly connected to the mounting holes 25. The heads of the screws 5 are arranged in the counterbores 45. The ventilation holes 43 enable the heat dissipation fins 23 to contact the external air. The counterbores 45 make the heads of the screws 5 flush with the base 4. The screws 5 connect and fix the base 4 to the conductive plate 2;

[0027] It is worth mentioning that the first fixing part 21 and the second fixing part 22 are provided with threaded holes 26, which are used in cooperation with the fastening screws 3;

[0028] It is worth mentioning that the fastening screws 3 are threadedly connected to the threaded holes 26. The screw rods of the fastening screws 3 are successively provided with spring washers 31 and washers 32. The elastic force of the spring washers 31 acts on the copper nose through the washers 32, thereby strengthening the gap between the copper nose and the first fixing part 21 and the second fixing part 22. This not only reduces the contact resistance value, but also enables the first fixing part 21 and the second fixing part 22 to absorb the heat of the copper nose to the greatest extent. At the same time, the elastic force released by the spring washers 31 also increases the friction between the fastening screws 3 and the threaded holes 26, ensuring the stability of their connection.

[0029] Through the above design scheme, the product can achieve the advantages of anti-interference and temperature rise control.

[0030] The above content further elaborates on the present invention in combination with specific embodiments. It cannot be determined that the specific implementation of the present invention is only limited to these descriptions. For those of ordinary skill in the technical field to which the present invention pertains, without departing from the concept of the present invention, several simple deductions or substitutions can still be made, which should all be regarded as falling within the protection scope determined by the claims submitted for the present invention.

Claims

1. A thermal overload relay that is easy to connect, comprising a thermal overload relay body (1), wherein two ends of the thermal overload relay body (1) are provided with a plurality of connection terminals (11), characterized in that: The connecting terminal (11) is provided with a conductive plate (2), and a stepped first fixing portion (21) and a second fixing portion (22) are provided at the upper and lower parts of the conductive plate (2), and the first fixing portion (21) and the second fixing portion (22) are provided with fastening screws (3). The back of the conductive plate (2) is provided with a plurality of heat dissipation fins (23) at equal intervals, and the bottom of the conductive plate (2) is provided with a base (4), and the base (4) is provided with a partition (41) and is arranged between the conductive plates (2), and both sides of the partition (41) are provided with clearance grooves (42).

2. The thermal overload relay for easy connection according to claim 1, characterized in that: The conductive plate (2) is provided with an extension portion (24), the extension portion (24) is connected and fixed to the connection terminal (11), and a mounting hole (25) is provided at the bottom of the conductive plate (2).

3. The easy-to-connect thermal overload relay according to claim 2, characterized in that: The base (4) is provided with a ventilation hole (43) and is arranged at the entrance of the heat dissipation fin (23). The base (4) is provided with a positioning hole (44). The positioning hole (44) is provided with a countersunk hole (45). The positioning hole (44) is provided with a screw (5) and is threadedly connected to the mounting hole (25). The head of the screw (5) is arranged in the countersunk hole (45).

4. The easy-to-connect thermal overload relay according to claim 3, characterized in that: The first fixing portion (21) and the second fixing portion (22) are provided with threaded holes (26).

5. The thermal overload relay for easy connection according to claim 4, characterized in that: The fastening screw (3) is threadedly connected to the threaded hole (26), and the screw rod of the fastening screw (3) is provided with a spring washer (31) and a gasket (32) in sequence.

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