CN219554581U - Miniature three-phase motor thermal protector - Google Patents

Abstract

The utility model discloses a miniature three-phase motor thermal protector, which comprises a device body with a knife switch and an interface, and further comprises a pressing plate, a pressure rod, a counting mechanism with a counter, a switching plate and a pressing part, wherein the counter in the counting mechanism is fixed on the outer wall of the device body through a connecting box, sliding rails are horizontally arranged on two sides of the inner wall of the connecting box, the switching plate can slide in the sliding rails, the pressing part is embedded in the switching plate and is positioned below the pressure rod, and the pressing plate is elastically supported at the top of the connecting box through a spring. According to the utility model, the recording structure is arranged below the knife switch, so that the breaking times of the three-phase motor thermal protector are automatically recorded, the three-phase motor thermal protector can be accurately judged by a later maintenance personnel, the manual breaking is not recorded, the judgment of the maintenance personnel is prevented from being influenced, the protruding block is fixed on the outer side of the electric wire, one end of the electric wire is prevented from being torn off from the interface, and the extremely large freedom of the electric wire is ensured.

Description

Miniature three-phase motor thermal protector

Technical Field

The utility model relates to the technical field of thermal protectors, in particular to a miniature three-phase motor thermal protector.

Background

The three-phase motor thermal protector is used for overcurrent or overheat protection of a three-phase motor, is an external protector of the motor and is connected with the motor by a star connection method, and has the advantages of having double protection functions of current overload protection and overheat protection. When the motor is in overload operation, the winding current is increased, the temperature of the heating wire of the protector is increased, the bimetallic strip senses the temperature to act, the circuit is disconnected, and the motor stops working, so that the safety of the motor is protected.

The existing three-phase motor thermal protector can be automatically closed when in short circuit, the knife can be manually moved upwards to start the protector, and the protector needs to be regularly overhauled to judge whether the protector can be normally used or not, but later maintenance staff cannot know whether the protector is in a short circuit state or not and how many times of short circuits occur when overhauling the thermal protector, so that the overhauling staff can be influenced to judge the protector.

Disclosure of Invention

The present utility model is directed to a miniature three-phase motor thermal protector to solve the above-mentioned problems set forth in the background art.

In order to solve the technical problems, the utility model provides the following technical scheme: the utility model provides a miniature three-phase motor thermal protector, includes the ware body that has knife switch and interface, still includes holding down plate, depression bar and has counter, switching board, the counter mechanism of pushing down the portion, counter in the counter mechanism passes through the connection box to be fixed at the ware body outer wall, is provided with the slide rail in connection box inner wall both sides level, and the switching board can slide in the slide rail, and the switching board is embedded to have the portion of pushing down and is located the depression bar below, the holding down plate passes through spring elastic support at the connection box top.

Further, the pressing part comprises a first through hole, a second through hole and a rubber ball with an extension side, wherein the first through hole, the second through hole and the rubber ball are penetrated through the switching plate, the extension side of the rubber ball is fixed at the bottom of the switching plate through screws, part of the rubber ball is embedded into the first through hole, and the first through hole and the second through hole in the switching plate are horizontal.

Furthermore, the first through hole and the second through hole are respectively matched with the outline dimension of the compression bar.

Further, push rod is connected to holding down plate one end, and push rod one end extends to the connection box outside.

Further, the counter comprises a counting button and a display screen, wherein the counting button is positioned below the pressing part, and the display screen extends to be parallel to the outer surface of the connecting box.

Furthermore, a traction rope is arranged on one side of the device body and the connector, a first lug with an embedded groove is arranged at the top of the traction rope, and a second lug with an embedded groove is connected with the first lug through a fastening bolt.

Further, the outer wall of the device body is electrically connected with a reset button.

The beneficial effects achieved by the utility model are as follows:

1. according to the utility model, the recording structure is arranged below the switch blade, and the breaking times of the three-phase motor thermal protector are automatically recorded, so that a later maintenance personnel can accurately judge the three-phase motor thermal protector, and the manual breaking is not recorded, thereby avoiding influencing the judgment of the maintenance personnel.

2. The lug is fixed on the outer side of the electric wire, so that the traction rope can generate reverse traction force on the electric wire when the other end of the electric wire is pulled, the electric wire is prevented from being pulled off from the interface, the great freedom of the electric wire is ensured, the same mark is arranged at the lug and the interface, and maintenance personnel can conveniently and rapidly distinguish the positions of the circuit and the corresponding interface.

Drawings

FIG. 1 is a schematic view of the overall structure of the present utility model;

FIG. 2 is a schematic view of a portion of the structure of the present utility model;

FIG. 3 is a front cross-sectional view of the junction box of the present utility model;

FIG. 4 is a bottom view of the rubber ball of the present utility model;

FIG. 5 is an enlarged schematic view of the present utility model at A in FIG. 2;

in the figure: 1. a knife switch; 2. an interface; 3. a lower pressing plate; 4. a compression bar; 5. a counter; 6. a switching board; 7. a first through hole; 8. a second through hole; 9. a pressing part; 10. a connection box; 11. a body; 12. a slide rail; 13. a spring; 14. a push rod; 15. rubber balls; 16. a count button; 17. a display screen; 18. a traction rope; 19. a first bump; 20. a second bump; 21. a reset button.

Detailed Description

The utility model is further described below with reference to the accompanying drawings.

Referring to fig. 1-5, the present utility model provides the following technical solutions: the miniature three-phase motor thermal protector comprises a device body 11 with a knife switch 1 and an interface 2, a lower pressing plate 3, a pressing rod 4, a counting mechanism with a counter 5, a switching plate 6 and a lower pressing part 9,

the counter 5 in the counting mechanism is fixed on the outer wall of the device body 11 through the connecting box 10, sliding rails 12 are horizontally arranged on two sides of the inner wall of the connecting box 10, the switching plate 6 can slide in the sliding rails 12, the switching plate 6 is embedded with a pressing part 9 and is positioned below the pressing rod 4, and the pressing plate 3 is elastically supported at the top of the connecting box 10 through a spring 13. When the brake is broken, the brake blade 1 is pressed down on the lower pressing plate 3 and drives the lower pressing plate 3 to move downwards, so that the lower pressing plate 3 drives the press rod 4 to move downwards, at the moment, the press rod 4 can be inserted into the first through hole 7 and drives the lower pressing part 9 to move downwards, at the moment, the lower pressing part 9 can be driven to press the counting button 16, so that the counter 5 counts, when the brake blade 1 needs to be manually disconnected, the slide rail 12 can be utilized to move the switching plate 6, so that the switch plate drives the second through hole 8 to move to the lower part of the press rod 4, at the moment, the press rod 4 can be inserted into the second through hole 8 when moving downwards, but cannot touch the counting button 16, the times of manual brake breaking are not recorded, and only the times of automatic brake breaking are recorded.

The pressing part comprises a first through hole 7 penetrating through the switching plate, a second through hole 8 and a rubber ball 15 with an extension side, the extension side of the rubber ball 15 is fixed at the bottom of the switching plate 6 through a screw, part of the rubber ball 15 is embedded into the first through hole 7, and the first through hole 7 and the second through hole 8 in the switching plate 6 are horizontal. The side edge of the rubber ball 15 is fixed at the bottom of the switching plate 6 through a screw, part of the rubber ball 15 is embedded into the first through hole 7, and the rubber ball 15 can automatically move back after moving on the compression bar 4 by utilizing the elasticity of rubber.

The first through hole 7 and the second through hole 8 are respectively matched with the outline dimension of the pressing rod 4, so that the pressing rod can penetrate through the first through hole or the second through hole.

One end of the lower pressing plate 3 is connected with a push rod 14, and one end of the push rod 14 extends to the outer side of the connection box 10, and the push rod 14 can push the switching plate 6 to switch the through hole below the pressing rod 4.

The counter 5 comprises a counting button 16 and a display screen 17, the counting button 16 is positioned below the pressing part 9, the display screen 17 extends to be parallel to the outer surface of the connecting box 10, and the display screen 17 can automatically display recorded data so as to be convenient for an overhaul worker to watch.

The connector body 11 and one side of the connector 2 are provided with a traction rope 18, the top of the traction rope 18 is provided with a first lug 19 with an embedded groove, the first lug 19 is connected with a second lug 20 with an embedded groove through a fastening bolt, one end of the wire is pressed at the connector 2, then the wire is clamped by the embedded groove and the embedded groove which are matched in the first lug 19 and the second lug 20, the two lugs are fixed together through the fastening bolt, the wire is clamped, and at the moment, the distance between the position of the lug clamping the wire and the nearest end of the wire is smaller than the length of the traction rope 18, so that the traction rope 18 can generate reverse pulling force on the wire when the other end of the wire is pulled, one end of the wire is prevented from being pulled off from the connector 2, the great freedom of the wire is ensured, the connector 2 can be marked in sequence, corresponding marks are also marked on the lugs, and the position of the connector 2 corresponding to the wire is conveniently and rapidly distinguished.

The outer wall of the device body 11 is electrically connected with a reset button 21.

Finally, it should be noted that: the foregoing description is only a preferred embodiment of the present utility model, and the present utility model is not limited thereto, but it is to be understood that modifications and equivalents of some of the technical features described in the foregoing embodiments may be made by those skilled in the art, although the present utility model has been described in detail with reference to the foregoing embodiments. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

Claims (7)

1. The utility model provides a miniature three-phase motor thermal protector, includes ware body (11) that have plug-in strip (1) and interface (2), its characterized in that: still include holding down plate (3), depression bar (4) and have counter (5), switch board (6), the counter mechanism of pushing down portion (9), counter (5) among the counter mechanism are fixed at ware body (11) outer wall through connecting box (10), are provided with slide rail (12) in connecting box (10) inner wall both sides level, and switch board (6) can slide in slide rail (12), and switch board (6) are embedded to have push down portion (9) and are located depression bar (4) below, holding down plate (3) are through spring (13) elastic support at connecting box (10) top.

2. The miniature three-phase motor thermal protector of claim 1, wherein: the push-down part comprises a first through hole (7) penetrating through the switching plate, a second through hole (8) and a rubber ball (15) with an extension side edge, the extension side edge of the rubber ball (15) is fixed at the bottom of the switching plate (6) through a screw, part of the rubber ball (15) is embedded into the first through hole (7), and the first through hole (7) and the second through hole (8) in the switching plate (6) are horizontal.

3. The miniature three-phase motor thermal protector of claim 2, wherein: the first through hole (7) and the second through hole (8) are respectively matched with the outline dimension of the compression bar (4).

4. The miniature three-phase motor thermal protector of claim 1, wherein: one end of the lower pressing plate (3) is connected with the push rod (14), and one end of the push rod (14) extends to the outer side of the connecting box (10).

5. The miniature three-phase motor thermal protector of claim 1, wherein: the counter (5) comprises a counting button (16) and a display screen (17), the counting button (16) is positioned below the pressing part (9), and the display screen (17) extends to be parallel to the outer surface of the connecting box (10).

6. The miniature three-phase motor thermal protector of claim 1, wherein: one side of the device body (11) and the connector (2) is provided with a traction rope (18), the top of the traction rope (18) is provided with a first lug (19) with an embedded groove, and the first lug (19) is connected with a second lug (20) with an embedded groove through a fastening bolt.

7. The miniature three-phase motor thermal protector of claim 1, wherein: the outer wall of the device body (11) is electrically connected with a reset button (21).