Circuit breaker operating mechanism of drawer type switch cabinet

Abstract

The utility model provides a breaker operating mechanism of a drawer type switch cabinet, comprising an operating shaft which is driven by an operating handle to rotate and is installed on a drawer, and the operating shaft drives a slide plate assembly to move up and down through a cam assembly; the cam assembly comprises a cam fixed to one end of the operation shaft and a limiting column arranged at the end, away from the rotation center of the cam, of the cam, and the limiting column is sleeved with a roller; the sliding plate assembly comprises a sliding plate moving in the up-down direction of the drawer and a first connecting plate matched with the cam, and a first long-strip-shaped hole extending in the horizontal direction and allowing the roller to stretch in is formed in the first connecting plate; the connecting rod assembly is connected with the sliding plate assembly and the handle driving mechanism and is suitable for converting movement of the sliding plate assembly into movement of a driving plate of the handle driving mechanism; and the handle driving mechanism comprises a support fixed on the circuit breaker operation panel and a driving plate slidably installed on the support, two parallel rolling shafts are installed on the driving plate, a movable groove allowing the circuit breaker handle to extend into is oppositely formed between the two rolling shafts, and the driving plate drives the circuit breaker handle to act through the rolling shafts.

Description

Technical Field

[0001] The utility model relates to the technical field of switch cabinets, in particular to a circuit breaker operating mechanism of a drawer-type switch cabinet. Background Art

[0002] Drawer-type switchgear is a widely used device in power systems. As a centrally controlled power distribution center, it has high reliability, safety and interchangeability. It is widely used in industrial and mining enterprises and high-rise buildings with high requirements for power supply reliability.

[0003] The existing drawer-type switchgear includes a drawer, a circuit breaker, an operating handle and a transmission mechanism. The operating handle drives the circuit breaker handle through the transmission mechanism to open and close the circuit breaker. However, the current transmission mechanism structure is relatively complex and easily wears out during use, shortening its service life. Utility Model Content

[0004] To this end, the utility model provides a circuit breaker operating mechanism for a drawer-type switch cabinet, comprising: an operating shaft, which is driven and rotated by an operating handle and is installed on the drawer, and the operating shaft drives a slide assembly to move up and down through a cam assembly; the cam assembly comprises a cam fixed to one end of the operating shaft, and a limit column provided at an end of the cam away from its rotation center, and a roller is sleeved on the limit column; the slide assembly comprises a slide that moves along the drawer in the up and down direction, and a first connecting plate that cooperates with the cam, and the first connecting plate is formed with a first elongated hole extending in the horizontal direction and for the roller to extend into; a connecting rod assembly connects the slide assembly and a handle driving mechanism, and is suitable for converting the movement of the slide assembly into the movement of a driving plate of the handle driving mechanism; the handle driving mechanism comprises a bracket fixed to the circuit breaker operating panel, and a driving plate slidably mounted on the bracket, two parallel rollers are installed on the driving plate, and a movable groove for the circuit breaker handle to extend into is formed between the two rollers, and the driving plate drives the circuit breaker handle to move through the rollers.

[0005] The operating shaft is a square shaft, and the cam is provided with a square hole matched with the square shaft.

[0006] The connecting rod assembly includes: a crank arm, having a first driving arm and a second driving arm extending outward along its rotation center and arranged at a certain angle; a first connecting rod, one end of which is hinged to the slide plate and the other end is hinged to the end of the first driving arm; a second connecting rod, one end of which is hinged to the driving plate and the other end is hinged to the end of the second driving arm.

[0007] A slide rail for the slide plate to slide is provided in the drawer.

[0008] The driving plate is formed with an opening groove corresponding to the operation panel of the circuit breaker. On two opposite inner walls of the opening groove, there are first mounting plates bent and extending towards the operation panel, and two of the rollers are installed between the two first mounting plates.

[0009] The technical solution of the present utility model has the following advantages:

[0010] 1. The circuit breaker operating mechanism of the drawer-type switchgear provided by the present utility model includes an operating shaft, a cam assembly, a slide plate assembly, a connecting rod assembly, and a handle driving mechanism. The cam assembly includes a cam fixed to one end of the operating shaft and a limiting post provided at one end of the cam away from its rotation center. A roller is sleeved on the limiting post. The slide plate assembly includes a slide plate moving in the up and down direction of the drawer and a first connecting plate cooperating with the cam. A first long hole extending in the horizontal direction and for the roller to extend into is formed on the first connecting plate. In this way, when the cam rotates following the operating shaft, the roller at the end of the cam abuts against the top wall or the bottom wall of the first long hole, thereby driving the slide plate to move up and down. The friction between the roller and the top wall or the bottom wall of the first long hole is rolling friction, which reduces wear and extends the service life. In addition, two parallel rollers are installed on the driving plate, and an activity groove for the circuit breaker handle to extend into is relatively formed between the two rollers. The driving plate drives the circuit breaker handle to act through the rollers. In this way, the friction between the rollers and the circuit breaker handle is also rolling friction, the friction force is small, the wear of the circuit breaker handle is reduced, and the service life is extended.

[0011] 2. For the circuit breaker operating mechanism of the drawer-type switchgear provided by the present utility model, the driving plate is formed with an opening groove corresponding to the operation panel of the circuit breaker. On two opposite inner walls of the opening groove, there are first mounting plates bent and extending towards the operation panel, and two of the rollers are installed between the two first mounting plates. In this way, the two first mounting plates for installing the rollers have the advantages of simple structure and convenient production. Description of the Drawings

[0012] In order to more clearly illustrate the specific embodiments of the present utility model or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0013] Figure 1 is a perspective view of the drawer-type switchgear of the present utility model;

[0014] Figure 2 is an assembly schematic diagram of the circuit breaker operating mechanism and the circuit breaker;

[0015] Figure 3Is a three-dimensional view of an operating shaft, a cam assembly, and a slide plate assembly;

[0016] Figure 4 Is an assembly schematic diagram of a handle drive mechanism and a circuit breaker;

[0017] Figure 5 Is an exploded structural schematic diagram of a handle drive mechanism.

[0018] Explanation of reference numerals: 1, operating shaft; 2, drawer; 3, cam assembly; 4, slide plate assembly; 5, cam; 6, limit post; 7, roller; 8, slide plate; 9, first connecting plate; 10, first long slot; 11, connecting rod assembly; 12, handle drive mechanism; 13, crank arm; 14, first drive arm; 15, second drive arm; 16, first connecting rod; 17, second connecting rod; 18, slide rail; 51, circuit breaker; 52, operation panel; 53, bracket; 54, drive plate; 55, roller; 56, circuit breaker handle; 57, movable slot; 58, open slot; 61, first mounting plate. Detailed implementation manners

[0019] Next, the technical solutions of the present invention will be clearly and completely described in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

[0020] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is 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 orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as a limitation of the present invention. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0021] In the description of the present invention, it should be noted that unless otherwise clearly specified and limited, the terms "installation", "connection", "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0022] In addition, the technical features involved in different embodiments of the present utility model described below can be combined with each other as long as they do not conflict with each other.

[0023] Embodiment

[0024] This embodiment provides a circuit breaker operating mechanism for a drawer-type switchgear, as Figure 1 and 2 shown, which includes an operating shaft 1, a cam assembly 3, a slide plate assembly 4, a connecting rod assembly 11, and a handle driving mechanism 12.

[0025] The operating shaft 1 is rotatably installed on the drawer 2 under the drive of an operating handle, and the operating shaft 1 drives the slide plate assembly 4 to move up and down through the cam assembly 3.

[0026] The cam assembly 3, as Figure 3 shown, includes a cam 5 fixed to one end of the operating shaft 1, and a limit post 6 provided at one end of the cam 5 away from its rotation center. A roller 7 is sleeved on the limit post 6. In this embodiment, the operating shaft 1 is a square shaft, and the cam 5 is provided with a square hole for cooperating with the square shaft.

[0027] The slide plate assembly 4, as Figure 3 shown, includes a slide plate 8 that moves in the up and down direction of the drawer 2, and a first connecting plate 9 that cooperates with the cam 5. A first long hole 10 that extends in the horizontal direction and into which the roller 7 extends is formed on the first connecting plate 9. A slide rail 18 for the slide plate 8 to slide up and down is provided in the drawer 2.

[0028] The connecting rod assembly 11 connects the slide plate assembly 4 and the handle driving mechanism 12, and is adapted to convert the movement of the slide plate assembly 4 into the movement of the driving plate 54 of the handle driving mechanism 12. In this embodiment, as Figure 1 and Figure 2 shown, the connecting rod assembly 11 includes: an elbow arm 13 having a first driving arm 14 and a second driving arm 15 that extend outward from its rotation center and are arranged at a certain angle; a first connecting rod 16, one end of which is hinged to the slide plate 8 and the other end of which is hinged to the end of the first driving arm 14; a second connecting rod 17, one end of which is hinged to the driving plate 54 and the other end of which is hinged to the end of the second driving arm 15. When the slide plate assembly 4 moves downward, the elbow arm 13 is driven to rotate clockwise around its rotation center through the first connecting rod 16, and then the driving plate 54 is driven to move to the right through the second connecting rod 17.

[0029] The handle driving mechanism 12, as Figure 4 and Figure 5As shown in the figure, it includes a bracket 53 fixed on the operation panel 52 of the circuit breaker 51, and a driving plate 54 slidably mounted on the bracket 53. Two parallel rollers 55 are mounted on the driving plate 54. An activity slot 57 for the circuit breaker handle 56 to extend into is formed relatively between the two rollers 55. The driving plate 54 drives the circuit breaker handle 56 to act through the rollers 55. In this embodiment, the driving plate 54 is formed with an opening slot 58 corresponding to the operation panel 52 of the circuit breaker 51. First mounting plates 61 bent and extended towards the operation panel 52 are provided on two relatively arranged inner walls of the opening slot 58. Two of the rollers 55 are mounted between the two first mounting plates 61.

[0030] The circuit breaker operating mechanism of the drawer-type switchgear provided by the present utility model includes an operating shaft 1, a cam assembly 3, a slide plate assembly 4, a connecting rod assembly 11, and a handle driving mechanism 12. When the cam 5 rotates following the operating shaft 1, the roller 7 at the end of the cam 5 abuts against the top wall or the bottom wall of the first long hole 10, thereby driving the slide plate 8 to move up and down. The rolling friction between the roller 7 and the top wall or the bottom wall of the first long hole 10 reduces wear and extends the service life. In addition, two parallel rollers 55 are mounted on the driving plate 54. An activity slot 57 for the circuit breaker handle 56 to extend into is formed relatively between the two rollers 55. The driving plate 54 drives the circuit breaker handle 56 to act through the rollers 55. In this way, the rolling friction also exists between the rollers 55 and the circuit breaker handle 56, the frictional force is small, the wear of the circuit breaker handle is reduced, and the service life is extended.

[0031] Obviously, the above embodiments are only examples given for clear illustration and are not limitations on the implementation manners. For those of ordinary skill in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to enumerate all the implementation manners here. The obvious changes or modifications derived therefrom still fall within the protection scope of the creation of the present utility model.

Claims

1. A circuit breaker operating mechanism for a drawer-type switchgear, characterized in that, Comprising: An operating shaft (1), rotatably mounted on a drawer (2) and driven by an operating handle, the operating shaft (1) driving a slide plate assembly (4) to move up and down through a cam assembly (3); The cam assembly (3) includes a cam (5) fixed to one end of the operating shaft (1), and a limit post (6) provided at an end of the cam (5) away from its rotation center, a roller (7) being sleeved on the limit post (6); The slide plate assembly (4) includes a slide plate (8) moving in the up and down direction of the drawer (2), and a first connecting plate (9) cooperating with the cam (5), a first long hole (10) extending in the horizontal direction and for the roller (7) to extend into being formed on the first connecting plate (9); A link assembly (11), connecting the slide plate assembly (4) and a handle driving mechanism (12), adapted to convert the movement of the slide plate assembly (4) into the movement of a driving plate (54) of the handle driving mechanism (12); The handle driving mechanism (12) includes a bracket (53) fixed to an operation panel (52) of a circuit breaker (51), and a driving plate (54) slidably mounted on the bracket (53), two parallel rollers (55) being mounted on the driving plate (54), an activity slot (57) for a circuit breaker handle (56) to extend into being relatively formed between the two rollers (55), the driving plate (54) driving the circuit breaker handle (56) to act through the rollers (55).

2. The circuit breaker operating mechanism of the drawer-type switchgear according to claim 1, wherein, The operating shaft (1) is a square shaft, and the cam (5) is provided with a square hole cooperating with the square shaft.

3. The circuit breaker operating mechanism of the drawer-type switchgear according to claim 1, characterized in that, The link assembly (11) includes: A crank arm (13) having a first driving arm (14) and a second driving arm (15) extending outward from its rotation center and arranged at a certain angle; A first link (16), one end of which is hinged to the slide plate (8) and the other end of which is hinged to an end of the first driving arm (14); A second link (17), one end of which is hinged to the driving plate (54) and the other end of which is hinged to an end of the second driving arm (15).

4. The circuit breaker operating mechanism of the drawer-type switchgear according to claim 1, characterized in that, A slide rail (18) for the slide plate (8) to slide is provided in the drawer (2).

5. The circuit breaker operating mechanism of the drawer-type switchgear according to claim 1, characterized in that, An opening slot (58) corresponding to the operation panel (52) of the circuit breaker (51) is formed on the driving plate (54), first mounting plates (61) bending and extending towards the operation panel (52) being provided on two opposite inner walls of the opening slot (58), and the two rollers (55) being mounted between the two first mounting plates (61).

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