CN217444300U

CN217444300U - Thermal overload relay

Info

Publication number: CN217444300U
Application number: CN202122885872.9U
Authority: CN
Inventors: 王彬鸣; 叶扬; 肖体锋; 林铸鑫; 胡建国; 岳喜雷; 李伟; 卢晨磊; 于雪峰
Original assignee: Zhejiang Chint Electrics Co Ltd
Current assignee: Zhejiang Chint Electrics Co Ltd
Priority date: 2021-11-23
Filing date: 2021-11-23
Publication date: 2022-09-16
Anticipated expiration: 2031-11-23

Abstract

A thermal overload relay comprises a shell, a fixed seat and an operating mechanism arranged on the fixed seat are arranged in the shell, the shell comprises a base and a side cover arranged on one side of the base, the side cover is provided with an avoiding hole which is used for avoiding a main circuit lead of the thermal overload relay, a supporting piece is arranged between the side cover and the operating mechanism and is connected with the fixed seat, the side surface of the support piece close to the side cover is provided with a wiring structure for limiting the main circuit conducting wire, an independent support piece is arranged between the side cover and the operating mechanism, the main circuit wire can be installed without separation through the wiring structure on the supporting piece, and can be aligned to the avoiding hole on the shell, thereby reducing the difficulty of assembling the shell, and moreover, the electric clearance and creepage distance between main circuit wires can be reduced, and the reliability of the thermal overload relay is improved.

Description

Thermal overload relay

Technical Field

The utility model relates to a low-voltage apparatus field especially relates to a thermal overload relay.

Background

Normally closed contacts of a general thermal overload relay are respectively connected with a coil end A1 and a coil end A2 of a contactor, and a 14NO/22NC normally open wiring port of the contactor is connected with the normally closed contacts of the thermal overload relay in series to realize the self-holding function of the contactor. Of course, the 14NO/22NC wiring port of the contactor is not connected with the normally closed contact of the thermal overload relay in series under some special conditions, and can be used for other functions.

However, the existing small-sized thermal overload relay cannot be directly connected with the contactor, needs to be inserted into the small-sized contactor for matching, and can shield coil ends A2 and 14NO/22NC wiring ports of the contactor, so that wiring difficulty is caused, and use experience is reduced. And the wiring of the internal wire of the existing small-sized thermal overload relay is complex, and the electrical distance and the creepage clearance between the wires can not meet the requirements.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome prior art's defect, provide one kind and walk the line convenience, safe and reliable's thermal overload relay.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the utility model provides a thermal overload relay, includes the casing, is equipped with the fixing base and sets up the operating device on the fixing base in the casing, the casing includes the base and installs the side cap in base one side, is equipped with on the side cap and dodges the hole, dodges the hole and is used for dodging thermal overload relay's main circuit wire, install the support between side cap and the operating device, the support with the fixing base is connected, is equipped with in the side that the support is close to the side cap and is used for spacingly the line structure of walking of main circuit wire.

Preferably, a second auxiliary terminal and a second straight connecting line are arranged in the housing, one end of the second straight connecting line is connected with the second auxiliary terminal, the other end of the second straight connecting line extends out of the housing and is used for connecting a third auxiliary terminal of the contactor, and a wiring structure used for limiting the second straight connecting line is arranged on the supporting piece.

Preferably, the routing structure comprises two limiting ribs which are oppositely arranged.

Preferably, the inner sides of the two limiting ribs of the routing structure are respectively provided with a limiting convex hull.

Preferably, the supporting piece includes two connecting plates that set up relatively to and connect the backup pad between two connecting plate one end, two connecting plates keep away from the one end of backup pad respectively with the fixing base is connected, forms the groove of dodging that is used for dodging operating device between two connecting plates and backup pad, walk the configuration setting of line on the side that the backup pad is close to the side cap.

Preferably, the inner side of one of the two connecting plates is provided with a positioning groove in limit fit with the fixing seat, the other connecting plate is provided with a positioning column, and the positioning column is inserted into the fixing seat in limit fit.

Preferably, the side cover is provided with an inclined guide structure corresponding to the periphery of the avoidance hole.

Preferably, guide structure includes the deflector of V type, is equipped with the fillet in the deflector inboard, dodges the hole setting in the bottom of fillet.

Preferably, the guide structure comprises a cylindrical guide post, a guide groove of an inverted cone structure is arranged in the middle of the guide post, and the avoidance hole is formed in the bottom of the guide groove.

Preferably, still including the protection system and the operating device generate heat, the base correspondence is equipped with first baffle between the protection system and the operating device generate heat, is equipped with first isolation muscle on first baffle, the side cap correspondence is equipped with the second baffle between the protection system and the operating device generate heat, is equipped with the second on the baffle and keeps apart the muscle, and first baffle and second baffle constitute the baffle after base and side cap installation, and first isolation muscle and second keep apart the muscle and constitute the isolation muscle after base and side cap installation, the baffle forms closed cavity with the isolation muscle in protection system one side generates heat.

The utility model discloses a thermal overload relay through set up independent support between side cap and operating device, can realize the exempting from of main circuit wire through walking the line structure on the support and leave the installation, can also make the main circuit wire aim at the hole of dodging on the casing, reduces the degree of difficulty of assembly casing, but also can reduce electric clearance and creepage distance between the main circuit wire, improves thermal overload relay reliability.

Drawings

Fig. 1-3 are schematic diagrams of the thermal overload relay and the contactor according to the present invention;

fig. 4 is a schematic structural diagram of the thermal overload relay of the present invention;

fig. 5 is another schematic structural diagram of the thermal overload relay of the present invention;

FIG. 6 is a schematic structural view of the support member of the present invention;

fig. 7 is a schematic structural diagram of a first main circuit wire of the present invention;

fig. 8 is an exploded view of the housing of the present invention;

fig. 9 is a schematic structural view of the side cover of the present invention;

fig. 10 is a schematic structural diagram of the base of the present invention.

Detailed Description

The following provides an example with reference to fig. 1 to 10, which further illustrates the embodiment of the thermal overload relay 5 according to the present invention. The thermal overload relay 5 of the present invention is not limited to the description of the following embodiments.

As shown in fig. 1-6, the utility model discloses a thermal overload relay 5 includes the casing, is equipped with fixing base 80 and sets up the operating device 8 on fixing base 80 in the casing, the casing includes base 51 and installs the side cap 52 in base 51 one side, is equipped with dodge hole 53 on the side cap 52, dodges hole 53 and is used for dodging the main circuit wire of thermal overload relay 5, install support 4 between side cap 52 and the operating device 8, support 4 with fixing base 80 connects, is equipped with in the side that support 4 is close to side cap 52 and is used for spacingly the line structure of walking of main circuit wire.

The utility model discloses a thermal overload relay through set up independent support 4 between side cap 52 and operating device 8, can realize the exempting from of main circuit wire through walking the line structure on support 4 and leave the installation, can also make the main circuit wire aim at the hole of dodging 53 on the casing, reduces the degree of difficulty of assembly casing, but also can reduce electric clearance and creepage distance between the main circuit wire, improves the 5 reliability of thermal overload relay.

As shown in fig. 6, the supporting member 4 is a U-shaped structure, the supporting member 4 includes two connecting plates 43 disposed oppositely and a supporting plate 44 connected between one ends of the two connecting plates 43, one ends of the two connecting plates 43 far away from the supporting plate 44 are respectively connected to the fixing base 80, an avoiding groove for avoiding the operating mechanism 8 is formed between the two connecting plates 43 and the supporting plate 44, and the routing structure is disposed on the side surface of the supporting plate 44 close to the side cover 52.

Further, one connecting plate 43 inboard in two connecting plates 43 is equipped with the spacing complex constant head tank 45 of fixing base 80, is equipped with reference column 46 on another connecting plate 43, reference column 46 pegs graft spacing cooperation on the fixing base. It can be understood that the two connecting plates 43 can also be in limit fit with the fixing seat 80 in other manners, and all belong to the protection scope of the present invention.

As shown in fig. 5, a second auxiliary terminal 65 and a second direct connection line 2 are further disposed in the housing, one end of the second direct connection line 2 is connected to the second auxiliary terminal 65, the other end of the second direct connection line 2 extends out of the housing and is used for connecting a third auxiliary terminal 66 of the contactor 6, the second auxiliary terminal 65 is used for connecting a self-holding circuit, the self-holding circuit can lock the contactor 6 in an attraction state through the connection of the second direct connection line 2, the supporting member 4 of this embodiment is provided with four sets of routing structures, and the four sets of routing structures are respectively used for limiting the first main circuit wire 31, the second main circuit wire 32, the third main circuit wire 33 and the second direct connection line 2. It can be understood that the second straight connecting line 2 and the corresponding wiring structure may not be provided, or even if the second straight connecting line 2 is provided, the corresponding wiring structure is not provided on the support member 4, and the support member 4 can be used to limit the existing first main circuit wire 31, second main circuit wire 32, and third main circuit wire 33, all belonging to the protection scope of the present invention.

As shown in fig. 6, the routing structure includes two limiting ribs 41 disposed oppositely, and the corresponding main circuit wire or the second straight connecting wire 2 is limited at the inner side of the two limiting ribs 41. Further, two sets of limiting convex hulls 42 are respectively arranged on the inner sides of the two limiting ribs 41 of the routing structure, and the two sets of limiting convex hulls 42 more reliably limit the main circuit wire or the second straight connecting wire 2 on the supporting piece 4.

As shown in fig. 7, the first main circuit wire 31, the second main circuit wire 32 and the third main circuit wire 33 have substantially the same structure, and are all Z-shaped structures, and one ends of the main circuit wires, which are respectively far away from the wire inlet end, are respectively provided with a welding surface 34 which is cut off to form a flat surface, and the welding surface 34 is used for welding with the heat generation protection system 7, so that the welding difficulty and the welding failure rate can be reduced.

Further, the side cover 52 is provided with an inclined guide structure corresponding to the circumference of the avoiding hole 53, and the guide structure can facilitate the first direct connection line 1, the second direct connection line 2, the first main circuit wire 31, the second main circuit wire 32 and the third main circuit wire 33 to pass through the corresponding avoiding hole 53.

Fig. 9 shows two guiding structures, a first guiding structure cooperating with the main circuit conductor and a second guiding structure cooperating with the first straight line and the second straight line 2, respectively. Specifically, the first guiding structure includes a V-shaped guiding plate 57, a fillet 591 is arranged on the inner side of the guiding plate 57, and avoidance holes 53 corresponding to the first main circuit wire 31, the second main circuit wire 32 and the third main circuit wire 33 are respectively arranged at the bottom of the fillet 591;

the second guiding structure comprises a cylindrical guiding column 58, a guiding groove 592 with an inverted cone structure is arranged in the middle of the guiding column 58, and the avoiding hole 53 corresponding to the first straight connecting line 1 and the second straight connecting line 2 is arranged at the bottom of the guiding groove 592.

The foregoing is a more detailed description of the present invention, taken in conjunction with the specific preferred embodiments thereof, and it is not intended that the invention be limited to the specific embodiments shown and described. To the utility model belongs to the technical field of ordinary technical personnel, do not deviate from the utility model discloses under the prerequisite of design, can also make a plurality of simple deductions or replacement, all should regard as belonging to the utility model discloses a protection scope.

Claims

1. The utility model provides a thermal overload relay, includes the casing, is equipped with fixing base (80) and sets up operating device (8) on fixing base (80) in the casing, its characterized in that: the casing includes base (51) and installs side cap (52) in base (51) one side, is equipped with dodge hole (53) on side cap (52), dodges hole (53) and is used for dodging the main circuit wire of thermal overload relay (5), install between side cap (52) and operating device (8) support (4), support (4) with fixing base (80) are connected, and the side that is close to side cap (52) in support (4) is equipped with and is used for spacingly the line structure of main circuit wire.

2. The thermal overload relay according to claim 1, wherein: the contactor is characterized in that a second auxiliary terminal (65) and a second straight connecting line (2) are arranged in the shell, one end of the second straight connecting line (2) is connected with the second auxiliary terminal (65), the other end of the second straight connecting line (2) extends out of the shell to be used for connecting a third auxiliary terminal (66) of the contactor (6), and a wiring structure used for limiting the second straight connecting line (2) is arranged on the supporting piece (4).

3. The thermal overload relay according to claim 1, wherein: the routing structure comprises two limiting ribs (41) which are oppositely arranged.

4. The thermal overload relay according to claim 3, wherein: the inner sides of the two limiting ribs (41) of the routing structure are respectively provided with a limiting convex hull (42).

5. The thermal overload relay according to claim 1, wherein: the support piece (4) comprises two connecting plates (43) which are oppositely arranged and a supporting plate (44) which is connected between one ends of the two connecting plates (43), one ends, far away from the supporting plate (44), of the two connecting plates (43) are respectively connected with the fixed seat (80), an avoidance groove for avoiding the operating mechanism (8) is formed between the two connecting plates (43) and the supporting plate (44), and the wiring structure is arranged on the side face, close to the side cover (52), of the supporting plate (44).

6. The thermal overload relay according to claim 5, wherein: one connecting plate (43) inboard in two connecting plates (43) is equipped with spacing complex constant head tank (45) of fixing base (80), is equipped with reference column (46) on another connecting plate (43), spacing cooperation on the fixing base is pegged graft in reference column (46).

7. The thermal overload relay of claim 1, wherein: the side cover (52) is provided with an inclined guide structure corresponding to the periphery of the avoidance hole (53).

8. The thermal overload relay according to claim 7, wherein: the guide structure comprises a V-shaped guide plate (57), a round angle (591) is arranged on the inner side of the guide plate (57), and the avoidance hole (53) is formed in the bottom of the round angle (591).

9. The thermal overload relay according to claim 7, wherein: the guide structure comprises a cylindrical guide post (58), a guide groove (592) with an inverted conical structure is arranged in the middle of the guide post (58), and the avoidance hole (53) is formed in the bottom of the guide groove (592).

10. The thermal overload relay according to claim 1, wherein: still include protection system (7) and operating device (8) generate heat, base (51) correspond and are equipped with first baffle (550) between protection system (7) and operating device (8) generate heat, are equipped with first isolation muscle (55) on first baffle (550), side cap (52) correspond and are equipped with second baffle (560) between protection system (7) and operating device (8) generate heat, are equipped with second isolation muscle (56) on baffle (500), and baffle (500) are constituteed after base (51) and side cap (52) installation to first baffle (550) and second baffle (560), and isolation muscle is constituteed after base (51) and side cap (52) installation to first isolation muscle (55) and second isolation muscle (56), baffle (500) and isolation muscle form the closed cavity in protection system (7) one side of generating heat.