Anti-falling structure, drawer and switch cabinet

Abstract

The invention relates to the technical field of electrical equipment, and discloses an anti-falling structure, a drawer and a switch cabinet, and the anti-falling structure comprises an arm rod which is rotatably connected to a drawer body; a limiting groove is formed in the first end of the arm rod; a lock head is arranged at the second end of the arm rod; a first distance is formed between the first end and the rotating point of the arm lever, a second distance is formed between the second end and the rotating point of the arm lever, and the first distance is larger than the second distance; the limiting shaft is fixedly arranged on the outer side face of the drawer body and slidably connected into the limiting groove. When the drawer body is pulled out in place from the inside of the frame, the second end of the arm rod descends around the rotating point, and the lock head ascends around the rotating point until the lock head is clamped with a lock hole correspondingly formed in the frame. According to the technical scheme, after the drawer body is pulled out, the lock head is clamped in the lock hole, balance of the drawer body is kept, the situation that the drawer body falls off in the pulling-out process can be effectively avoided, a circuit is prevented from being pulled apart, maintenance personnel are prevented from being injured by crashing, and then safety accidents are avoided.

Description

Technical Field

[0001] The invention relates to the technical field of electrical equipment, and in particular to an anti-falling structure, a drawer and a switch cabinet. Background Art

[0002] Low-voltage switchgear is an electrical device widely used in low-voltage power systems. Low-voltage switchgear is divided into fixed low-voltage switchgear and drawer-type low-voltage switchgear according to the structural form. The drawer-type low-voltage switchgear generally includes: a cabinet and a drawer arranged in the cabinet, and electrical components are installed in the drawer; the drawer can be easily pulled out and inserted into the cabinet. The structure of the above-mentioned drawer-type low-voltage switchgear is convenient for maintenance and replacement of electrical components; in particular, the faulty drawer can be pulled out for maintenance without power outage, avoiding losses caused by power outages, thereby improving the reliability of power supply.

[0003] When inspecting a drawer-type low-voltage switchgear, the drawer is usually pulled out a little more to expose more electrical components in the drawer for easy inspection. However, when the drawer is pulled out a little more, it is easy to cause the drawer to lose balance and fall, which not only easily breaks the line connecting the electrical components, but also easily injures the maintenance personnel, thus causing safety accidents. Summary of the invention

[0004] In view of this, the present invention provides an anti-falling structure to solve the problem that when a drawer-type low-voltage switch cabinet is being repaired and some drawers are pulled out for the convenience of maintenance, the drawers may easily lose balance and fall, which may not only easily tear off the lines connecting the electrical components, but also easily injure the maintenance personnel, thereby causing safety accidents.

[0005] In a first aspect, the present invention provides an anti-fall structure, comprising:

[0006] An arm is rotatably connected to the outer side of the drawer body; the drawer body is a box-type structure with a top opening slidably connected to the frame; the frame is fixedly arranged; a limiting groove is provided at the first end of the arm close to the upper pull-out side of the drawer body; a lock is provided at the second end of the arm away from the upper pull-out side of the drawer body; the first end is at a first distance from the rotation point of the arm, the second end is at a second distance from the rotation point of the arm, and the first distance is greater than the second distance;

[0007] A limiting shaft is fixedly arranged on the outer side of the drawer body, and the limiting shaft is slidably connected in the limiting groove;

[0008] The anti-drop structure has a first state in which, when the drawer body is pulled out from the frame, the second end of the arm rod descends around the rotation point, and the lock head at the second end of the arm rod rises around the rotation point until it is engaged with the corresponding lock hole on the frame. Beneficial effect: The present application adopts the above technical solution. After the drawer body is pulled out, the lock head is engaged in the lock hole to keep the balance of the drawer body, which can effectively prevent the drawer body from falling during the pulling and pulling process, prevent the line from being broken, and prevent maintenance personnel from being injured, thereby avoiding the occurrence of safety accidents. The anti-drop structure described in the present application is not only reasonable and simple in structure, but also relatively low in investment cost, and high in durability and reliability.

[0009] Optionally, an inclined surface is provided on the top surface of the lock head, and one side of the inclined surface close to the first end is higher than the other side away from the first end; the anti-drop structure has a second state in which the lock head moves into the frame and disengages from the lock hole when the drawer body is inserted into the frame. Beneficial effect: The present application adopts the above technical solution, and when the drawer body is inserted, the inclined surface on the lock head can be smoothly disengaged from the lock hole to prevent jamming.

[0010] Optionally, the limiting groove is an arc groove with the rotation point as the center. Beneficial effect: The present application adopts the above technical solution to facilitate the sliding of the limiting shaft in the limiting groove, thereby facilitating the rotation of the arm around the rotation point.

[0011] Optionally, a counterweight is provided between the rotation point and the first end of the arm. Beneficial effect: The present application adopts the above technical solution, and by providing a counterweight, further ensures that the arm rotates in the correct direction when the drawer body is pulled outward, so that the lock head is engaged with the lock hole.

[0012] In a second aspect, the present invention further provides a drawer, comprising:

[0013] at least one of the anti-fall structures;

[0014] The drawer body, the anti-falling structure is arranged on the drawer body. Beneficial effect: The present application adopts the above technical solution to prevent the drawer from falling when being pulled outward, thereby ensuring the safety of the drawer when in use.

[0015] Optionally, the anti-drop structure is symmetrically arranged on two opposite outer sides of the drawer body. Beneficial effect: The present application adopts the above technical solution, so that the weight on both sides of the drawer is basically uniform, and the movement balance of the subsequent drawer during pulling and inserting is maintained.

[0016] In a third aspect, the present invention further provides a switch cabinet, comprising:

[0017] a plurality of said drawers;

[0018] The frame has a plurality of opening structures at the front, and the plurality of drawers are slidably connected to the plurality of opening structures respectively; a first strip perpendicular to the drawer pulling direction is arranged at the bottom of the opening structure, and a plurality of first mounting holes arranged linearly are arranged on the first strip along the length direction of the first strip; a second strip perpendicular to the drawer pulling direction is arranged at the bottom of the drawer, and a plurality of second mounting holes arranged linearly are arranged on the second strip along the length direction of the second strip; the number of the first mounting holes is the same as the number of the second mounting holes, and the positions of the plurality of first mounting holes and the plurality of second mounting holes correspond one to one; a first protrusion is fixedly arranged on at least one first mounting hole, and a second protrusion is fixedly arranged on all the second mounting holes corresponding to the first mounting hole without the first protrusion installed; the number or setting position of the second protrusions of the second strips on the plurality of drawers are different. Beneficial effect: The present application adopts the above technical solution, which not only prevents each drawer from falling when being pulled outward, and ensures the safety of the switch cabinet when in use; but also ensures that the position of the drawer corresponds one to one with the position of the opening structure of the frame, and prevents mis-insertion.

[0019] Optionally, the plurality of opening structures are arranged in layers according to height; the number of the second protrusion is one; the layer number of the drawer is the same as the arrangement position number of the second protrusion; the number of the second mounting holes is not less than the total number of layers of the plurality of opening structures. Beneficial effect: The present application adopts the above technical solution, which further facilitates to quickly know the layer number corresponding to the drawer through the position of the second protrusion at the bottom of the drawer, so as to accurately and quickly position the drawer.

[0020] Optionally, a heat dissipation baffle is provided at the rear of the frame. Beneficial effects: The application adopts the above technical solution, which is conducive to heat dissipation from the inside of the switch cabinet to the outside, ensuring that the electrical components have a good working environment.

[0021] Optionally, a plurality of lead holes are provided at the top of the frame, and a wire harness structure is provided below the lead holes in the frame; the wire harness structure is provided in the vertical direction and passes through all drawers in sequence, and the wire harness structure is suitable for constraining the lines in the frame. Beneficial effect: The present application adopts the above technical solution, and by providing a wire harness structure in conjunction with the lead holes, the lines are prevented from being messy, and the line arrangement is kept neat and beautiful. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0023] Figure 1 A schematic diagram of a partial three-dimensional structure of an anti-fall structure provided in an embodiment of the present invention Figure 1 ;

[0024] Figure 2 A schematic diagram of a partial three-dimensional structure of an anti-fall structure provided in an embodiment of the present invention Figure 2 ;

[0025] Figure 3 Schematic diagram of the three-dimensional structure of the drawer provided in the embodiment of the present invention Figure 1 ;

[0026] Figure 4 A schematic diagram of the rotation of the anti-fall structure provided in an embodiment of the present invention;

[0027] Figure 5 A schematic diagram of a partial three-dimensional structure of a switch cabinet provided in an embodiment of the present invention Figure 1 ;

[0028] Figure 6 A schematic diagram of a partial three-dimensional structure of a switch cabinet provided in an embodiment of the present invention Figure 2 ;

[0029] Figure 7 A schematic diagram of a partial three-dimensional structure of a switch cabinet provided in an embodiment of the present invention Figure 3 ;

[0030] Figure 8 Schematic diagram of the three-dimensional structure of the drawer provided in the embodiment of the present invention Figure 2 ;

[0031] Fig. 9 A schematic diagram of a partial three-dimensional structure of a switch cabinet provided in an embodiment of the present invention Figure 4 ;

[0032] Fig.10 It is a schematic diagram of the three-dimensional structure of the second anti-misinsertion component provided in an embodiment of the present invention;

[0033] Fig.11 It is a schematic diagram of the three-dimensional structure of the first anti-misinsertion component provided in an embodiment of the present invention;

[0034] Fig.12 A schematic diagram of a partial three-dimensional structure of a switch cabinet provided in an embodiment of the present invention Figure 5 .

[0035] Description of reference numerals:

[0036] 1. Arm; 2. Round hole; 3. Lock; 4. Drawer body; 5. Limiting groove; 6. Counterweight; 7. Drawer; 8. Rotating shaft; 9. Limiting shaft; 10. Locking hole; 11. Frame; 12. Heat dissipation baffle; 13. First strip; 14. First mounting hole; 15. Second strip; 16. Second mounting hole; 17. First protruding piece; 18. Second protruding piece; 19. Lead hole; 20. Wiring structure; 21. First anti-misinsertion assembly; 22. Second anti-misinsertion assembly. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0038] like Figures 1 to 5 A specific implementation of the anti-fall structure shown includes: an arm 1 and a limiting shaft 9.

[0039] like Figure 1 , Figures 3 to 5 As shown, the arm 1 is rotatably connected to the outer side of the drawer body 4; specifically, a circular hole 2 is opened on the rod body of the arm 1, and a rotating shaft 8 is provided on the outer side of the drawer body 4, and the rotating shaft 8 is rotatably connected in the circular hole 2. The drawer body 4 is a box-type structure with an open top surface slidably connected to the frame 11; the outer side of the drawer body 4 is a side that slides relative to the frame 11. The frame 11 is fixedly arranged; the frame 11 is a component of the switch cabinet, and the switch cabinet can be a low-voltage switch cabinet. Electrical components and / or electrical components are arranged in the drawer body 4; a limiting groove 5 is provided at the first end of the arm 1 close to the upper pull-out side of the drawer body 4; further, the limiting groove 5 is an arc groove with the rotation point as the center of the circle. A lock 3 is provided at the second end of the arm 1 away from the upper pull-out side of the drawer body 4; the lock 3 is a protrusion arranged upward, and the side of the protrusion close to the first end is a plane along the vertical direction. The first end and the second end of the arm 1 are two opposite ends. The first end is at a first distance from the rotation point of the arm 1, and the second end is at a second distance from the rotation point of the arm 1, and the first distance is greater than the second distance. The limit shaft 9 is fixedly arranged on the outer side of the drawer body 4, and the limit shaft 9 is slidably connected to the limit groove 5. Figure 4As shown, the anti-drop structure has a first state in which when the drawer body 4 is pulled out from the frame 11 to the outside, the second end of the arm 1 descends around the rotation point, and the lock head 3 at the second end of the arm 1 rises around the rotation point until it is engaged with the corresponding lock hole 10 on the frame 11. Figure 4 In the figure, the arrow on the left indicates the rotation direction of the lock head 3 in the first state, and the arrow on the right indicates the rotation direction of the first end of the arm 1.

[0040] Further, such as Figure 1 and Figure 2 As shown, an inclined surface is provided on the top surface of the lock head 3, and one side of the inclined surface close to the first end is higher than the other side away from the first end; the anti-fall structure has a second state in which when the drawer body 4 is inserted into the frame 11, the lock head 3 moves into the frame 11 and disengages from the lock hole 10. A counterweight 6 is provided between the rotation point and the first end on the arm 1. The counterweight 6 can be in the form of a sheet, which can be called a counterweight sheet.

[0041] like Figures 3 to 5 A specific embodiment of the drawer shown includes: the anti-drop structure and a drawer body 4. The anti-drop structure is arranged on the drawer body 4. Further, the anti-drop structure is symmetrically arranged on two opposite outer sides of the drawer body 4.

[0042] like Figures 6 to 12 A specific implementation of the switch cabinet shown includes: a plurality of drawers 7 and a frame 11. The switch cabinet described in the present application may be a low-voltage switch cabinet.

[0043] like Figure 6 , Figures 8 to 11As shown, the front part of the frame 11 is provided with a plurality of opening structures, and the plurality of drawers 7 are slidably connected to the plurality of opening structures respectively; a first strip member 13 perpendicular to the pulling direction of the drawer 7 is provided at the bottom of the opening structure, and a plurality of first mounting holes 14 arranged linearly are provided on the first strip member 13 along the length direction of the first strip member 13; a second strip member 15 perpendicular to the pulling direction of the drawer 7 is provided at the bottom of the drawer 7, and a plurality of second mounting holes 16 arranged linearly are provided on the second strip member 15 along the length direction of the second strip member 15; the number of the first mounting holes 14 is the same as the number of the second mounting holes 16, and the positions of the plurality of first mounting holes 14 and the plurality of second mounting holes 16 correspond one to one; a first protrusion 17 is fixedly provided on at least one first mounting hole 14, and a second protrusion 18 is fixedly provided on all the second mounting holes 16 corresponding to the first mounting hole 14 without the first protrusion 17 installed; the protruding direction of the second protrusion 18 is arranged opposite to the protruding direction of the first protrusion 17. The first protrusion 17 and the second protrusion 18 may have the same structure and size. The number or setting position of the second protrusion 18 of the second strip 15 on the multiple drawers 7 are different. The first strip 13 and the first protrusion 17 constitute the first anti-misinsertion assembly 21; the second strip 15 and the second protrusion 18 constitute the second anti-misinsertion assembly 22. Specifically, the first mounting hole 14 and the second mounting hole 16 are both threaded holes; the first protrusion 17 and the second protrusion 18 are convex head screws. The first strip 13 and the second strip 15 may be thin sheets.

[0044] Furthermore, the plurality of opening structures are arranged in layers according to height; the number of the second protrusion 18 is one; the layer number of the drawer 7 is the same as the arrangement position number of the second protrusion 18; for example: the number of the second installation hole 16 in which the second protrusion 18 is installed from left to right represents the corresponding layer of the drawer 7. Fig.10 As shown, in the drawer 7 of the third layer, the second protrusion 18 is installed in the third second installation hole 16 from left to right. The number of the second installation holes 16 is not less than the total number of layers of the plurality of opening structures.

[0045] Further, such as Figure 6 and Figure 7 As shown, a heat dissipation shield 12 is provided at the rear of the frame 11, and a plurality of heat dissipation holes are provided on the heat dissipation shield 12. Figure 6 , Figure 7 and Fig.12As shown, a plurality of wire lead holes 19 are provided at the top of the frame 11, and a wire bundle structure 20 is provided below the wire lead holes 19 in the frame 11; the wire bundle structure 20 is arranged in a vertical direction and passes through all drawers 7 in sequence, and the wire bundle structure 20 is suitable for constraining the lines in the frame 11.

[0046] Although the embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations are all within the scope defined by the appended claims.

Claims

1. A fall prevention structure, characterized in that: include: An arm (1) is rotatably connected to the outer side of a drawer body (4); the drawer body (4) is a box-type structure with an opening on the top surface slidably connected to a frame (11); the frame (11) is fixedly arranged; a limit groove (5) is provided at a first end of the arm (1) close to the upper pull-out side of the drawer body (4); a lock (3) is provided at a second end of the arm (1) away from the upper pull-out side of the drawer body (4); a first distance is between the first end and the rotation point of the arm (1), a second distance is between the second end and the rotation point of the arm (1), and the first distance is greater than the second distance; A limiting shaft (9) is fixedly arranged on the outer side of the drawer body (4), and the limiting shaft (9) is slidably connected in the limiting groove (5); The anti-fall structure has a first state in which, when the drawer body (4) is pulled outward from the frame (11) to the right, the second end of the arm (1) descends around the rotation point, and the lock head (3) at the second end of the arm (1) rises around the rotation point until it is engaged with a corresponding lock hole (10) on the frame (11).

2. The anti-fall structure according to claim 1, characterized in that: An inclined surface is provided on the top surface of the lock head (3), and one side of the inclined surface close to the first end is higher than the other side away from the first end; the anti-fall structure has a second state in which, when the drawer body (4) is inserted into the frame (11), the lock head (3) moves into the frame (11) and is disengaged from the lock hole (10).

3. The anti-fall structure according to claim 1, characterized in that: The limiting groove (5) is an arc-shaped groove with the rotation point as the center.

4. The anti-fall structure according to claim 1, characterized in that: A counterweight (6) is provided between the rotation point and the first end of the arm (1).

5. A drawer, characterized in that: include: At least one anti-fall structure according to any one of claims 1 to 4; A drawer body (4), wherein the anti-fall structure is arranged on the drawer body (4).

6. The drawer according to claim 5, characterized in that: The anti-falling structure is symmetrically arranged on two opposite outer side surfaces of the drawer body (4).

7. A switch cabinet, characterized in that: include: A plurality of drawers (7) as claimed in claim 5 or 6; A frame (11) is provided with a plurality of opening structures at the front, and a plurality of drawers (7) are slidably connected to the plurality of opening structures respectively; a first strip member (13) perpendicular to the drawer (7) pulling direction is provided at the bottom of the opening structure, a plurality of first mounting holes (14) arranged linearly along the length direction of the first strip member (13) are provided on the first strip member (13), a second strip member (15) perpendicular to the drawer (7) pulling direction is provided on the bottom of the drawer (7), a plurality of first mounting holes (14) arranged linearly along the length direction of the second strip member (15) are provided on the second strip member (15). The invention relates to a plurality of drawers (7) having two mounting holes (16); the number of the first mounting holes (14) is the same as the number of the second mounting holes (16), and the positions of the plurality of first mounting holes (14) and the plurality of second mounting holes (16) correspond one to one; a first protrusion (17) is fixedly arranged on at least one first mounting hole (14), and a second protrusion (18) is fixedly arranged on all second mounting holes (16) corresponding to the first mounting hole (14) not having the first protrusion (17) installed thereon; and the number or arrangement position of the second protrusions (18) of the second strips (15) on the plurality of drawers (7) are different.

8. The switch cabinet according to claim 7, characterized in that: The plurality of opening structures are arranged in layers according to height; the number of the second protrusion (18) is one; the layer number of the drawer (7) is the same as the arrangement position number of the second protrusion (18); and the number of the second mounting holes (16) is not less than the total number of layers of the plurality of opening structures.

9. The switch cabinet according to claim 7, characterized in that: A heat dissipation baffle (12) is arranged at the rear of the frame (11).

10. The switch cabinet according to claim 7, characterized in that: A plurality of lead holes (19) are provided at the top of the frame (11), and a wire binding structure (20) is provided below the lead holes (19) in the frame (11); the wire binding structure (20) is arranged in a vertical direction and passes through all the drawers (7) in sequence, and the wire binding structure (20) is suitable for constraining the lines in the frame (11).

Images