A drawer anti-falling mechanism of an extracted switch cabinet

Abstract

The application provides a drawer anti-falling mechanism of a draw-out switch cabinet, and belongs to the technical field of low-voltage complete power distribution equipment. The drawer anti-falling mechanism comprises a switch cabinet, a guide rail, a push rod assembly, a bottom shell and a drawer assembly. A plurality of drawer slots are arranged in the switch cabinet, and the bottom shell is installed in the drawer slots. The guide rail is fixedly installed on the bottom shell, and the drawer assembly is arranged above the bottom shell. The push rod assembly is installed in the drawer assembly, and the drawer anti-falling function is realized through the cooperation of the guide rail and the push rod assembly for locking and unlocking actions. The application solves the problem that the traditional draw-out low-voltage switch cabinet is not easy to grasp the force when the drawer is drawn out, and the drawer is easy to slide out and fall, which causes damage to the equipment and personal safety.

Description

Technical Field

[0001] This invention belongs to the technical field of low-voltage complete set of power distribution equipment, specifically relating to a drawer anti-fall mechanism for a withdrawable switchgear. Background Technology

[0002] Existing low-voltage switchgear technology uses pull-out drawers. Since the insertion and extraction force of the primary and secondary connectors reaches tens of Newtons, operators often need considerable operating force to complete the extraction action. If the operating force is not properly controlled, the drawer is prone to sliding out or falling accidentally, resulting in equipment damage and personal safety accidents.

[0003] While some products on the market have anti-fall functions, some are cumbersome and inconvenient, while others are unreliable. Therefore, a drawer anti-fall mechanism for a pull-out switch cabinet is proposed. Summary of the Invention

[0004] The purpose of this section is to outline some aspects of embodiments of the present invention and to briefly describe some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be construed as limiting the scope of the invention.

[0005] Given the following technical problems in the existing technology: when the drawer of a traditional pull-out low-voltage switchgear is pulled out, improper force can easily cause the drawer to slide out and fall, causing damage to equipment and personal safety.

[0006] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a drawer anti-fall mechanism for a pull-out switch cabinet, comprising a switch cabinet, a guide rail, a push rod assembly, a bottom shell, and a drawer assembly. The switch cabinet is equipped with several drawer slots, and the bottom shell is installed in the drawer slots; The guide rail is fixedly installed on the bottom shell, and the drawer assembly is placed on top of the bottom shell; The push rod assembly is installed inside the drawer assembly. The locking and unlocking actions are performed through the cooperation of the guide rail and the push rod assembly, thereby realizing the drawer's anti-fall function.

[0007] Furthermore, the guide rail is provided with an irregularly shaped sliding groove; The irregular sliding groove includes an inlet, a stop, a guide, and a straight section. The stop is a right angle, and the inlet and guide are cubic Bézier S-shaped curves.

[0008] Furthermore, the drawer assembly includes a drawer bottom plate, a drawer front panel, and a drawer housing. The drawer front panel is installed on the front side of the drawer housing, and the drawer bottom plate is installed at the bottom of the drawer housing.

[0009] Furthermore, the push rod assembly includes a push rod, a limit pin assembly, a button, and a push rod fixing frame; A pair of push rod fixing frames are installed above the drawer bottom plate. The push rod is slidably installed on the drawer bottom plate through the push rod fixing frames. The limiting pin assembly cooperates with the irregular sliding groove. The front end of the push rod is provided with an oblique elongated hole. The limiting pin assembly is installed in the oblique elongated hole and can move along the long diameter of the hole. The drawer bottom plate has a horizontal elongated hole at the position corresponding to the limit pin assembly.

[0010] Furthermore, the limiting pin assembly includes a sliding pin and a stepped screw. The top of the sliding pin passes through the transverse elongated hole and is connected to the stepped screw, and can move in a restricted manner along the long diameter direction of the transverse elongated hole. The sliding pin is inserted into the irregular sliding groove.

[0011] Furthermore, the oblique elongated hole and the transverse elongated hole are concentric on the left side before the button is pressed, and concentric on the right side after the button is pressed.

[0012] Furthermore, the button includes a button shaft and a button sleeve. The button sleeve is fixed through the drawer panel of the drawer assembly. The button shaft is fixedly connected to the push rod. The front of the button shaft is provided with a through hole for attaching a padlock to achieve locking.

[0013] The beneficial effects of this invention are as follows: This invention has a simple, stable, and reliable structure, a clear, intuitive, and easy-to-understand user interface, and low cost. It can effectively prevent the risk of accidental falls caused by improper operation and improve safety. When the drawer is pulled out to near the disengaged position, the sliding pin is blocked by the guide rail's stop, and the drawer is mechanically locked. The button must be pressed to unlock it before it can be pulled out again. This prevents the drawer from sliding out and falling due to improper operation force, thus preventing equipment damage and personal safety accidents, and improving the safety of switch cabinet operation. A through hole is provided on the button shaft. After installing a padlock, the button can be locked to prevent the drawer from being pulled out, thus meeting the safety isolation requirements during maintenance and preventing accidental operation.

[0014] Other features and advantages of the invention will be set forth in the following description, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention may be realized and obtained by means of the structures particularly pointed out in the description and the drawings. Attached Figure Description

[0015] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Wherein: Figure 1 This is a top view of the drawer assembly according to an embodiment of the present invention; Figure 2 This is a schematic diagram of the guide rail being installed on the bottom shell structure according to an embodiment of the present invention; Figure 3 This is a schematic diagram of the push rod assembly installed inside the drawer assembly according to an embodiment of the present invention; Figure 4 This is a schematic diagram of the limiting pin assembly structure of the push rod assembly according to an embodiment of the present invention; Figure 5 This is a schematic diagram of the drawer assembly in different entry and exit states according to an embodiment of the present invention; Figure 6 This is a schematic diagram of the drawer assembly structure according to an embodiment of the present invention; Figure 7 This is a schematic diagram of several drawer assemblies installed in a switch cabinet structure according to an embodiment of the present invention; Reference numerals: 100, guide rail; 110, irregular sliding groove; 111, guide part; 112, blocking part; 113, guide part; 114, straight part; 120, recessed platform; 130, through hole; 200, push rod assembly; 210, push rod; 211, oblique elongated hole; 220, limit pin assembly; 221, sliding pin; 222, stepped screw; 230, button; 231, button shaft; 232, button sleeve; 233, through hole; 240, push rod fixing frame; 300, bottom shell; 400, drawer assembly; 410, drawer bottom plate; 411, horizontal elongated hole; 420, drawer front panel. Detailed Implementation

[0016] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0017] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the invention is not limited to the specific embodiments disclosed below.

[0018] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that is mutually exclusive with other embodiments.

[0019] Secondly, the present invention is described in detail with reference to the schematic diagrams. When detailing the embodiments of the present invention, for ease of explanation, the cross-sectional views illustrating the device structure may be partially enlarged, not according to the usual scale. Furthermore, the schematic diagrams are merely examples and should not limit the scope of protection of the present invention. In addition, actual fabrication should include three-dimensional spatial dimensions of length, width, and depth.

[0020] Reference Figures 1-7 This invention provides a drawer anti-fall mechanism for a pull-out switch cabinet, comprising a switch cabinet, a guide rail 100, a push rod assembly 200, a bottom shell 300, and a drawer assembly 400. The switch cabinet is equipped with several drawer slots, and the bottom shell 300 is installed in the drawer slots; The guide rail 100 is fixedly installed on the bottom shell 300, and the drawer assembly 400 is placed on top of the bottom shell 300; The push rod assembly 200 is installed inside the drawer assembly 400. The guide rail 100 and the push rod assembly 200 cooperate to lock and unlock the drawer, thereby achieving the drawer anti-fall function.

[0021] like Figure 2 As shown, the guide rail 100 is provided with an irregularly shaped sliding groove 110; The irregular sliding groove 110 includes an inlet portion 111, a stop portion 112, a guide portion 113, and a straight portion 114. The stop portion 112 is a right angle, and the inlet portion 111 and the guide portion 113 are cubic Bezier S-curves. The guide rail 100 has two diagonally arranged recesses 120 and through holes 130. The guide rail 100 is installed and fixed to the bottom shell 300 by screws through the through holes 130 of the recesses 120. The path curve of the irregular sliding groove 110 determines the range of motion of the bottom of the sliding pin 221 placed therein. The sliding groove 110 and the sliding pin 221 adopt a clearance fit, and the sliding pin 221 can only move along the length path of the sliding groove 110.

[0022] like Figure 3 and Figure 6As shown, the drawer assembly 400 includes a drawer bottom plate 410, a drawer front panel 420, and a drawer shell. The drawer front panel 420 is installed on the front side of the drawer shell, the drawer bottom plate 410 is installed at the bottom of the drawer shell, and a pair of handles are installed on the drawer front panel 420. The drawer shell forms an accommodating space, and primary connectors, secondary connectors, electrical components, and connecting cables are arranged inside. The drawer assembly 400 is placed on top of the bottom shell 300 and can be pulled out relative to the bottom shell 300. Slide rails are installed on both sides of the bottom shell 300, and the side walls of the drawer shell are adapted to slide and connect with the slide rails.

[0023] like Figure 3 As shown, the push rod assembly 200 includes a push rod 210, a limit pin assembly 220, a button 230, and a push rod fixing frame 240; A pair of push rod fixing frames 240 are installed above the drawer bottom plate 410. The push rod 210 is slidably mounted on the drawer bottom plate 410 through the push rod fixing frames 240, so that the push rod 210 can only make linear reciprocating movements in the direction of drawer pulling. Figure 4 As shown, the limiting pin assembly 220 cooperates with the irregular sliding groove 110. The front end of the push rod 210 is provided with an oblique elongated hole 211. The limiting pin assembly 220 is installed in the oblique elongated hole 211 and can move along the long diameter of the hole. The limiting pin assembly 220 moves along the path of the irregular sliding groove 110 with the pull-out action of the drawer assembly 400. The drawer bottom plate 410 has a horizontal elongated hole 411 at the position corresponding to the limit pin assembly 220.

[0024] like Figure 4 As shown, the limiting pin assembly 220 includes a sliding pin 221 and a stepped screw 222. The top of the sliding pin 221 passes through the transverse elongated hole 411 and is connected to the stepped screw 222. It can move in a restricted manner along the long axis of the transverse elongated hole 411. The sliding pin 221 is inserted into the irregular sliding groove 110. The stepped screw 222 is slidably connected to the oblique elongated hole 211. Both the sliding pin 221 and the stepped screw 222 are clearance fit and coated with grease, so that the limiting pin assembly 220 can slide freely in the oblique elongated hole 211 of the push rod 210. The lateral displacement of the sliding pin 221 is constrained by the transverse elongated hole 411.

[0025] The oblique elongated slot 211 and the transverse elongated slot 411 are concentric on the left before the button 230 is pressed, and concentric on the right after the button 230 is pressed. This alignment ensures that the sliding pin 221 has a defined travel between the locked and unlocked positions: when the button 230 is not pressed, the sliding pin 221 is located at the point where the left centers of the two slots coincide, and is in the locked position; after the button 230 is pressed, the push rod 210 moves inward, and the oblique side of the oblique elongated slot 211 applies a transverse thrust to the limiting pin assembly 220, causing the sliding pin 221 to move to the right along the transverse elongated slot 411 until the right centers of the two slots coincide, and is in the unlocked position.

[0026] like Figure 3 The button 230 includes a button shaft 231 and a button sleeve 232. The button sleeve 232 passes through the drawer panel 420 of the drawer assembly 400 and is fixed. The button shaft 231 is fixedly connected to the push rod 210. The front part of the button shaft 231 is provided with a through hole 233, which is used to install a padlock to achieve locking. The button 230 at its proximal end protrudes from the drawer panel 420 and is located next to the drawer handle. The right thumb can easily press it. After the padlock is installed, the button shaft 231 cannot be pressed down, and the drawer assembly 400 is prohibited from being pulled out. It can be used as a safety locking mechanism in the inspection and maintenance scenario.

[0027] The specific implementation method is as follows: During use, when the drawer is pushed into the bottom shell 300, the bottom cylindrical edge of the sliding pin 221 first contacts the guide portion 111 of the irregular sliding groove 110 of the guide rail. The smooth S-shaped curve of the guide portion 111 ensures that the drawer assembly 400 enters without obstruction. At the same time, the limiting pin assembly 220 is pushed to the right front in the oblique elongated hole 211. When the limiting pin assembly 220 reaches the guide portion 113, its smooth curve also ensures that the drawer assembly 400 continues to slide in. At the same time, the limiting pin assembly 220 on the push rod assembly 200 is pushed to the left rear in the oblique elongated hole 211. The drawer continues to be pushed in until it is connected in place. During the drawer pulling out locking process, when the drawer assembly 400 is pulled outward, after the sliding pin 221 has completed the free path of the straight section at the front of the irregular sliding groove 110, the bottom cylindrical edge contacts the blocking part 112 of the path curve. Since the blocking part 112 is right-angled and perpendicular to the movement direction of the sliding pin 221, the movement of the sliding pin 221 is mechanically blocked, and the drawer assembly 400 is prevented from being pulled out further, thereby achieving anti-fall locking and avoiding the drawer from accidentally sliding out and falling due to excessive operating force. During the unlocking process, when it is necessary to continue pulling out the drawer assembly 400, the operator presses the button 230 on the drawer panel 420. The push rod 210 moves inward with the button shaft 231. The limit pin assembly 220 at the top of the push rod 210 is pushed by the oblique side of the oblique long waist hole 211, which restricts its movement to the right within the horizontal long waist hole 411 of the drawer bottom plate 410. This causes the bottom of the sliding pin 221 to move to the right and disengage from the blocking part 112, so that the drawer assembly 400 can continue to be pulled out and disengage from the switch cabinet. During the padlock locking process, after the padlock is installed in the through hole 233 at the front of the button shaft 231, the button shaft 231 is locked and cannot be pressed, the push rod 210 cannot move inward, the sliding pin 221 cannot move laterally to disengage from the blocking part 112, and the drawer assembly 400 is completely prohibited from being pulled out, thus achieving a safe locking.

[0028] It should be understood that numerous specific implementation decisions can be made during the development of any practical implementation, such as in any engineering or design project. Such development efforts may be complex and time-consuming, but for those of ordinary skill in the art who benefit from this disclosure, the development effort will be a routine task in design, manufacturing, and production without requiring extensive experimentation.

[0029] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A drawer anti-fall mechanism for a pull-out switch cabinet, comprising a switch cabinet, a guide rail (100), a push rod assembly (200), a bottom shell (300), and a drawer assembly (400), characterized in that: The switch cabinet is equipped with several drawer slots, and the bottom shell (300) is installed in the drawer slots; The guide rail (100) is fixedly installed on the bottom shell (300), and the drawer assembly (400) is placed on the top of the bottom shell (300). The push rod assembly (200) is installed inside the drawer assembly (400). The guide rail (100) and the push rod assembly (200) work together to lock and unlock the drawer, thus achieving the drawer anti-fall function.

2. The drawer anti-fall mechanism of a pull-out switch cabinet according to claim 1, characterized in that: The guide rail (100) is provided with an irregular sliding groove (110); The irregular sliding groove (110) includes an inlet (111), a stop (112), a guide (113), and a straight section (114). The stop (112) is a right angle, and the inlet (111) and the guide (113) are cubic Bezier S-curves. The inlet (111), the stop (112), the guide (113), and the straight section (114) are connected in sequence.

3. The drawer anti-fall mechanism of a pull-out switch cabinet according to claim 2, characterized in that: The drawer assembly (400) includes a drawer bottom plate (410), a drawer front panel (420), and a drawer housing. The drawer front panel (420) is installed on the front side of the drawer housing, and the drawer bottom plate (410) is installed at the bottom of the drawer housing.

4. The drawer anti-fall mechanism of a pull-out switch cabinet according to claim 3, characterized in that: The push rod assembly (200) includes a push rod (210), a limit pin assembly (220), a button (230), and a push rod fixing frame (240). A pair of push rod fixing frames (240) are installed above the drawer bottom plate (410). The push rod (210) is slidably installed on the drawer bottom plate (410) through the push rod fixing frames (240). The limiting pin assembly (220) cooperates with the irregular sliding groove (110). The front end of the push rod (210) is provided with an oblique elongated hole (211). The limiting pin assembly (220) is installed in the oblique elongated hole (211) and can move along the long diameter of the hole. The drawer bottom plate (410) has a horizontal elongated hole (411) at the position corresponding to the limiting pin assembly (220).

5. The drawer anti-fall mechanism of a pull-out switch cabinet according to claim 4, characterized in that: The limiting pin assembly (220) includes a sliding pin (221) and a stepped screw (222). The top of the sliding pin (221) passes through the transverse elongated hole (411) and is connected to the stepped screw (222). It can move in a restricted manner along the long axis of the transverse elongated hole (411). The sliding pin (221) is inserted into the irregular sliding groove (110).

6. The drawer anti-fall mechanism of a pull-out switch cabinet according to claim 5, characterized in that: The oblique elongated waist hole (211) and the transverse elongated waist hole (411) are concentric on the left side before the button (230) is pressed, and concentric on the right side after the button (230) is pressed.

7. The drawer anti-fall mechanism of a pull-out switch cabinet according to claim 4, characterized in that: The button (230) includes a button shaft (231) and a button sleeve (232). The button sleeve (232) is fixed through the drawer panel (420) of the drawer assembly (400). The button shaft (231) is fixedly connected to the push rod (210). The front part of the button shaft (231) is provided with a through hole (233). The through hole (233) is used to install a padlock to achieve locking.

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