Door locking mechanism for switchgear

Abstract

The utility model discloses a door locking mechanism for power distribution cabinet, and the locking assembly is arranged between the door plate of the cabinet door and the interlocking rod, and the locking assembly comprises, the elbow arm, is rotatably connected on the support, and is hinged with the interlocking rod, the connecting rod is hinged on the elbow arm, and the axial movement can be driven by the elbow arm, the rotating rod is rotatably connected on the connecting rod, and the axial movement can be together with the connecting rod, and the rotating rod rotates around the axis when the axial movement, the lock tongue is arranged on the rotating rod, and the lock tongue is converted in the locking and unlocking two states through the rotating of the rotating rod, the lock catch is seted up with the lock hole, and the lock hole is matched with the lock tongue of the rotating rod. The rotating rod of the utility model is matched with the guide sliding slot on the sliding sleeve through the positioning pin, realizes the conversion of the lock tongue between the locking and unlocking two states, and the structure is simple, convenient operation prevents the cabinet door opening state operation grounding switch break -open, eliminates the loophole of misoperation, avoids the occurrence of safety accidents, and improves the safety and reliability.

Description

Technical Field

[0001] This utility model relates to the field of power equipment technology, and in particular to a door locking mechanism for a power distribution cabinet. Background Technology

[0002] Distribution cabinets are widely used in distribution stations and prefabricated substations in load centers such as urban residential communities, high-rise buildings, large public buildings, and factories.

[0003] When overhauling a distribution cabinet, power must be disconnected before any operation is performed to prevent electric shock hazards caused by sudden power restoration during maintenance. To ensure operational safety, the distribution cabinet door must be closed before the grounding switch can be closed. The grounding switch is locked via a door interlock mechanism to prevent the door from opening when the grounding switch is closed, thus improving operational safety and reliability. However, the existing door interlock mechanism of the distribution cabinet has the following potential hazard: with the cabinet door open, personnel can still operate the grounding switch, creating a vulnerability for misoperation that could lead to accidents, indicating insufficient safety and reliability. Utility Model Content

[0004] In view of the shortcomings of existing door interlocking mechanisms in distribution cabinets, the applicant provides a door locking mechanism for distribution cabinets with a reasonable structure, which prevents the grounding switch from being operated when the cabinet door is open, eliminates the loophole of misoperation, and improves safety and reliability.

[0005] The technical solution adopted in this utility model is as follows: A door locking mechanism for a power distribution cabinet includes a locking assembly disposed between the cabinet door panel and a locking rod. The locking assembly comprises: a crank arm rotatably connected to a bracket and hinged to the locking rod; a connecting rod hinged to the crank arm and axially movable by the crank arm; a rotating rod rotatably connected to the connecting rod and axially movable with the connecting rod, rotating around an axis during axial movement; a latch on the rotating rod, the latch switching between locked and unlocked states by the rotation of the rotating rod; and a latch with a lock hole that engages with the latch on the rotating rod. When locked, the latch engages in the lock hole; when unlocked, the latch moves out of the lock hole.

[0006] As a further improvement to the above technical solution: The connecting rod and the rotating rod are fitted with a sliding sleeve, which is connected to the mounting plate. The connecting rod and the rotating rod can move axially within the sliding sleeve.

[0007] A locating pin is radially inserted into the rotating rod, with one end of the locating pin extending outside the rotating rod; a spiral guide groove is provided on the sliding sleeve, and the locating pin passes through the guide groove and can move along the guide groove.

[0008] The guide groove is formed on the 1 / 4 circle of the sleeve wall. The length of the guide groove is 1 / 4 circle. The axial length of the guide groove matches the axial stroke of the rotating rod for opening and closing. One end of the guide groove is the locking stop point and the other end is the unlocking stop point.

[0009] The connecting rod has a T-shaped second connecting groove, and the rotating rod has a corresponding T-shaped connector. The connector matches the second connecting groove of the connecting rod and can be rotatably engaged in the second connecting groove.

[0010] A limit boss is provided on the rotating rod, located on the axial inner side of the locking tongue.

[0011] A spiral groove is provided on the outer wall of the rotating rod, and the insertion hole for the locating pin is located on the spiral path of the spiral groove.

[0012] The end of the connecting rod that connects to the crank arm has a first connecting groove, and the crank arm is inserted into the first connecting groove.

[0013] The crank arm is a V-shaped plate, including a first connecting arm and a second connecting arm. The first connecting arm is hinged to the interlocking rod by a pin, and the second connecting arm is hinged to the connecting rod by a pin. A first connecting hole is opened on the first connecting arm, and a second connecting hole is opened on the second connecting arm. The first connecting hole and the second connecting hole are oblong holes.

[0014] The latch of the lever is perpendicular to the keyhole when locked and parallel to the keyhole when unlocked.

[0015] The beneficial effects of this utility model are as follows: The rotating rod of this utility model cooperates with the guide groove on the sliding sleeve through the positioning pin, so that the rotating rod moves axially and rotates around the center at the same time, realizing the switching between the locking and unlocking states of the lock tongue. The structure is simple and easy to operate. The rotating rod is connected to the interlocking rod of the operating mechanism through the connecting rod and the crank arm, realizing bidirectional locking between the cabinet door and the operating mechanism. After the cabinet door is locked, the door locking mechanism is locked, the operating mechanism is unlocked, and the operating shaft can be operated. Except when the operating mechanism is grounded, the cabinet door cannot be opened. The cabinet door can only be opened after the operating mechanism is grounded. After the cabinet door is opened, the door locking mechanism is unlocked, the operating mechanism is locked, and the operating shaft cannot be operated. This prevents the grounding switch from being opened and closed when the cabinet door is open, eliminates the loophole of misoperation, avoids the occurrence of safety accidents, and improves safety and reliability. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the present invention in the locked state.

[0017] Figure 2 This is a schematic diagram of the unlocked state of this utility model.

[0018] Figure 3The diagram shows the structure of the locking component in the locked state. a) is a perspective view, and b) is a sectional view.

[0019] Figure 4 The diagram shows the structure of the locking component in the unlocked state. a) is a perspective view, and b) is a sectional view.

[0020] Figure 5 This is a schematic diagram of the connecting rod.

[0021] Figure 6 This is a schematic diagram of the rotating rod.

[0022] Figure 7 This is a schematic diagram of the sliding sleeve.

[0023] In the picture: 10. Locking assembly; 1. Bracket; 2. Crank arm; 21. First connecting arm; 211. First connecting hole; 22. Second connecting arm; 221. Second connecting hole; 3. Connecting rod; 31. First connecting groove; 32. Third connecting hole; 33. Second connecting groove; 4. Rotating rod; 41. Connector; 42. Locking tongue; 43. Limiting boss; 44. Insertion hole; 45. Spiral groove; 5. Sliding sleeve; 51. Sleeve part; 52. Flange part; 53. Guide groove; 6. Positioning pin; 7. Locking buckle; 71. Lock hole; 20. Door panel; 30. Interlocking rod; 40. Mounting plate. Detailed Implementation

[0024] The specific embodiments of this utility model are described below with reference to the accompanying drawings.

[0025] like Figure 1 , Figure 2 As shown, this utility model provides a door locking mechanism installed between the cabinet door and the operating mechanism of a power distribution cabinet, including a locking component 10 and a locking rod 30. The locking component 10 is installed between the door panel 20 of the cabinet door and the locking rod 30, and the other end of the locking rod 30 is connected to the operating mechanism.

[0026] like Figures 1 to 4 As shown, the locking assembly 10 includes a bracket 1, a crank arm 2, a connecting rod 3, a rotating rod 4, a sliding sleeve 5, a positioning pin 6, and a latch 7. The bracket 1 is fixedly connected to the cabinet panel (not shown in the figure). The crank arm 2 is rotatably connected to the bracket 1 via a pin. One end of the connecting rod 3 is hinged to the crank arm 2, and the other end is connected to the rotating rod 4. The connecting rod 3 and the rotating rod 4 are axially movable and inserted into the sliding sleeve 5. The sliding sleeve 5 is fixedly connected to the mounting plate 40. The positioning pin 6 is radially inserted into the rotating rod 4, and one end protrudes from the sliding sleeve 5. The latch 7 is connected to the inside of the door panel 20 and cooperates with the rotating rod 4 to achieve locking and unlocking.

[0027] The crank arm 2 is a V-shaped plate, including a first connecting arm 21 and a second connecting arm 22. The first connecting arm 21 is hinged to the interlocking rod 30 via a pin, and the second connecting arm 22 is hinged to the connecting rod 3 via a pin. The first connecting arm 21 has a first connecting hole 211 for inserting the pin, and the second connecting arm 22 has a second connecting hole 221 for inserting the pin. The first connecting hole 211 and the second connecting hole 221 are elongated holes, providing travel space for the pin to move when the crank arm 2 rotates.

[0028] like Figures 3 to 5 As shown, the end of the connecting rod 3 connected to the crank arm 2 has a first connecting groove 31 and a third connecting hole 32. The crank arm 2 is inserted into the first connecting groove 31, and the pin connecting the connecting rod 3 and the crank arm 2 is inserted into the third connecting hole 32. The end of the connecting rod 3 connected to the rotating rod 4 has a second connecting groove 33. The second connecting groove 33 is a T-shaped groove with an opening on one side. The small diameter groove part is located on the outer side near the shaft end, and the large diameter groove part is located on the inner side axially.

[0029] like Figure 3 , Figure 4 , Figure 6 As shown, one end of the rotating rod 4 connected to the connecting rod 3 is provided with a T-shaped connector 41. The connector 41 matches the second connecting groove 33 of the connecting rod 3, and the connector 41 is rotatably engaged in the second connecting groove 33. The other end of the rotating rod 4 opposite to the connector 41 is provided with a locking tongue 42 and a limiting boss 43. The locking tongue 42 is located at the end of the rotating rod 4, and the limiting boss 43 is located on the axial inner side of the locking tongue 42. The locking tongue 42 cooperates with the latch 7 to lock and unlock, and the limiting boss 43 limits the axial displacement of the rotating rod 4. A recess 44 is radially opened on the rod part of the rotating rod 4 near the connector 41. The positioning pin 6 is fixedly inserted into the recess 44, with one end protruding outside the rotating rod 4. A spiral groove 45 is provided on the outer wall of the rod near the connector 41. The insertion hole 44 is located on the spiral path of the spiral groove 45. The spiral groove 45 is a lubrication groove used to add lubricating oil to lubricate the relative movement between the rotating rod 4, the connecting rod 3 and the sliding sleeve 5.

[0030] like Figure 3 , Figure 4 , Figure 7As shown, the sliding sleeve 5 is a T-shaped sleeve, including a sleeve portion 51 and a flange portion 52 at the head. The sleeve portion 51 is fitted onto the connecting rod 3 and the rotating rod 4, and the flange portion 52 is fixedly connected to the mounting plate 40 by fasteners. A spiral guide groove 53 is provided on the wall surface of the sleeve portion 51, corresponding to the positioning pin 6. The positioning pin 6 passes through the guide groove 53 and can move along the guide groove 53. The guide groove 53 limits the displacement path of the positioning pin 6, thereby limiting the opening and closing axial direction and rotational stroke of the rotating rod 4. The guide groove 53 is formed on a 1 / 4-circumference wall surface of the sleeve portion 51, and its length is 1 / 4 of a circumference. The axial length of the guide groove 53 matches the opening and closing axial stroke of the rotating rod 4. The end of the guide groove 53 furthest from the flange portion 52 is the locking stop point, and the end closest to the flange portion 52 is the unlocking stop point. (Reference) Figure 1 , Figure 3 In the locked state, the locating pin 6 moves along the guide groove 53 to the locking stop point, as shown in the reference. Figure 2 , Figure 4 When the lock is open, the positioning pin 6 moves along the guide groove 53 to the unlock stop.

[0031] like Figures 1 to 4 As shown, the latch 7 is a U-shaped component. A horizontal locking hole 71 is provided on the protruding horizontal plate facing the rotating rod 4. The locking hole 71 cooperates with the locking tongue 42 of the rotating rod 4 to achieve locking and unlocking. (Reference) Figure 1 , Figure 3 In the locked state, the latch 42 rotates to a vertical position perpendicular to the horizontal keyhole 71, and the latch 42 is locked onto the keyhole 71; Reference Figure 2 , Figure 4 When the lock is in the unlocked state, the tongue of the bolt 42 rotates to a horizontal position parallel to the horizontal keyhole 71, and the bolt 42 moves out of the keyhole 71.

[0032] In actual use, this utility model is as follows: Figure 2 , Figure 4 As shown, when the cabinet door of the distribution cabinet needs to be opened, the operating mechanism must be switched to the grounded state before the cabinet door can be opened. When opening the cabinet door, the door panel 20 is pulled outward. The latch 7 pulls the rotating rod 4 and the connecting rod 3 axially forward together through the latch 42 of the rotating rod 4. The positioning pin 6 on the rotating rod 4 moves spirally along the guide groove 53 on the sliding sleeve 5, causing the rotating rod 4 to move axially and rotate relative to the connecting rod 3 to the unlocking stop point of the guide groove 53. After the latch 42 of the rotating rod 4 changes from a vertical state to a horizontal state, it disengages from the lock hole 71 of the latch 7. When the connecting rod 3 moves axially, it drives the crank arm 2 to rotate. The second connecting arm 22 of the crank arm 2 swings forward and the first connecting arm 21 swings upward, pushing the interlocking rod 30 upward. The door locking mechanism is unlocked, the operating mechanism is locked, and the operating shaft cannot be operated. Figure 1 , Figure 3As shown, when closing the cabinet door, during the process of pushing the door panel 20 inward, the locking tongue 42 of the rotating rod 4 first passes through the lock hole 71 of the latch 7 and then abuts against the door panel 20. As the door panel 20 continues to be pushed inward, it abuts against the locking tongue 42 of the rotating rod 4, pushing the rotating rod 4 and the connecting rod 3 axially backward together. The positioning pin 6 on the rotating rod 4 moves spirally along the guide groove 53 on the sliding sleeve 5, causing the rotating rod 4 to move axially and rotate around the axis to the locking stop point of the guide groove 53. The locking tongue 42 on the rotating rod 4 changes from a horizontal state to a vertical state and locks onto the latch 7. When the connecting rod 3 moves axially, it drives the crank arm 2 to rotate. The second connecting arm 22 of the crank arm 2 swings backward and the first connecting arm 21 swings down, pulling the interlocking rod 30 down. The door locking mechanism is locked, the operating mechanism is unlocked, and the operating shaft can be operated.

[0033] The rotating rod 4 of this utility model cooperates with the guide groove 53 on the sliding sleeve 5 through the positioning pin 6, so that the rotating rod 4 rotates around the center while moving axially, realizing the switching between the locking tongue 42 and the unlocking state. The structure is simple and the operation is convenient. The rotating rod 4 is connected to the interlocking rod 30 of the operating mechanism through the connecting rod 3 and the crank arm 2, realizing the two-way locking between the cabinet door and the operating mechanism. After the cabinet door is locked, the door locking mechanism is locked and the operating mechanism is unlocked, and the operating shaft can be operated. After the cabinet door is opened, the door locking mechanism is unlocked and the operating mechanism is locked, and the operating shaft cannot be operated. This prevents the grounding switch from being opened and closed when the cabinet door is open, eliminates the loophole of misoperation, avoids the occurrence of safety accidents, and improves safety and reliability.

[0034] The above description is an explanation of the present utility model and not a limitation thereof. The present utility model can be modified in any form without departing from its spirit.

Claims

1. A door locking mechanism for a power distribution cabinet, characterized in that: The locking assembly (10) is disposed between the door panel (20) and the interlocking rod (30) of the cabinet door. The locking assembly (10) includes, The crank arm (2) is rotatably connected to the bracket (1) and hinged to the interlocking rod (30); The connecting rod (3) is hinged to the crank arm (2) and can be driven to move axially by the crank arm (2); Rotary rod (4) is rotatably connected to connecting rod (3) and can move axially together with connecting rod (3). Rotary rod (4) rotates around axis when moving axially. A locking tongue (42) is provided on the rotating rod (4). The rotating rod (4) causes the locking tongue (42) to switch between locked and unlocked states by rotating. The latch (7) has a lock hole (71) which engages with the latch (42) of the rotating rod (4). When locked, the latch (42) is locked in the lock hole (71), and when unlocked, the latch (42) moves out of the lock hole (71).

2. The door locking mechanism for the distribution cabinet according to claim 1, characterized in that: The connecting rod (3) and the rotating rod (4) are fitted with a sliding sleeve (5), which is connected to the mounting plate (40). The connecting rod (3) and the rotating rod (4) can move axially within the sliding sleeve (5).

3. The door locking mechanism for the power distribution cabinet according to claim 2, characterized in that: A positioning pin (6) is radially inserted on the rotating rod (4), with one end of the positioning pin (6) extending out of the rotating rod (4); a spiral guide groove (53) is provided on the sliding sleeve (5), and the positioning pin (6) passes through the guide groove (53) and can move along the guide groove (53).

4. The door locking mechanism for the distribution cabinet according to claim 3, characterized in that: The guide groove (53) is formed on the 1 / 4 circle of the sleeve part (51). The length of the guide groove (53) is 1 / 4 circle. The axial length of the guide groove (53) matches the axial stroke of the rotating rod (4) for opening and closing. One end of the guide groove (53) is the locking stop point and the other end is the unlocking stop point.

5. The door locking mechanism for a power distribution cabinet according to claim 1, characterized in that: The connecting rod (3) has a T-shaped second connecting groove (33), and the rotating rod (4) has a corresponding T-shaped connector (41). The connector (41) matches the second connecting groove (33) of the connecting rod (3), and the connector (41) is rotatably engaged in the second connecting groove (33).

6. The door locking mechanism for a power distribution cabinet according to claim 1, characterized in that: A limiting boss (43) is provided on the rotating rod (4) on the axial inner side of the locking tongue (42).

7. The door locking mechanism for a power distribution cabinet according to claim 1, characterized in that: A spiral groove (45) is provided on the outer wall of the rotating rod (4), and the insertion hole (44) of the insertion positioning pin (6) is located on the spiral path of the spiral groove (45).

8. The door locking mechanism for a power distribution cabinet according to claim 1, characterized in that: The first connecting groove (31) is provided at one end of the connecting rod (3) and the crank arm (2), and the crank arm (2) is inserted into the first connecting groove (31).

9. The door locking mechanism for a power distribution cabinet according to claim 1, characterized in that: The crank arm (2) is a V-shaped plate, including a first connecting arm (21) and a second connecting arm (22). The first connecting arm (21) is hinged to the interlocking rod (30) by a pin, and the second connecting arm (22) is hinged to the connecting rod (3) by a pin. A first connecting hole (211) is opened on the first connecting arm (21), and a second connecting hole (221) is opened on the second connecting arm (22). The first connecting hole (211) and the second connecting hole (221) are oblong holes.

10. The door locking mechanism for a power distribution cabinet according to claim 1, characterized in that: The tongue of the locking tongue (42) of the rotating rod (4) is perpendicular to the lock hole (71) when it is locked and parallel to the lock hole (71) when it is unlocked.

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