A distribution box with a composite self-adapting elastic sealing structure

Abstract

The utility model belongs to the field of distribution box, concretely relates to a distribution box with composite self -adaptation elastic sealing structure, including box and door, be equipped with the door frame on the box, be equipped with sealing strip installation structure along the closed circumferential direction on the door frame, be equipped with the composite sealing strip in sealing strip installation structure, the composite sealing strip includes rigid support spare and elastic sealing piece, and the elastic sealing piece forms the sealing lip that projects to the door frame outside, the sealing lip is configured as when the box door closes, can through the self -elastic deformation adaptively stick to the sealing surface of box door, to form the main seal, the distribution box through the sealing lip of composite sealing strip is closed and is self -elastic deformation sticks to the box door, forms the adaptive seal, the processing and assembly tolerance tolerance of box door and door frame is high, can also guarantee effective sealing under slight deformation, the rigid support spare provides stable framework support for the elastic sealing piece, prevents its excessive compression and produces plastic deformation, ensures that the sealing lip keeps good resilience and sealing pressure for a long time.

Description

Technical Field

[0001] This utility model belongs to the field of distribution box technology, specifically relating to a distribution box with a composite adaptive elastic sealing structure. Background Technology

[0002] Distribution boxes are widely used in various industrial, civil, and outdoor locations, and their sealing performance directly affects the safety and lifespan of internal electrical components. Existing distribution box doors often use a single-material rubber sealing strip, achieving sealing by deforming the strip when the door is closed. This structure has the following drawbacks: First, uneven sealing pressure: Traditional sealing strips rely on the overall deformation of the door or the pressure of locking force. The pressure on the sealing strip may be inconsistent at different locations on the door, easily leading to localized sealing failure, especially noticeable with larger doors. Second, long-term sealing failure: A single rubber sealing strip is prone to permanent deformation (plastic deformation) after long-term pressure, temperature changes, or aging, resulting in decreased resilience, weakened sealing pressure, and ultimately, sealing failure. Third, poor installation stability: Sealing strips are usually fixed with adhesive or simple clips, which are prone to loosening and detachment under frequent opening and closing or external stress. Fourth, high precision requirements for processing and assembly: To achieve reliable sealing, the flatness and parallelism of the box frame and door are extremely important, increasing manufacturing costs and assembly difficulty.

[0003] Therefore, there is an urgent need for a sealing structure for distribution boxes that offers more reliable sealing performance, strong adaptability, long service life, and stable installation. Summary of the Invention

[0004] The purpose of this utility model is to overcome the shortcomings and deficiencies of the existing technology and to provide a distribution box with a composite adaptive elastic sealing structure. This distribution box achieves uniform, reliable and durable sealing along the circumference of the box door by cooperating with the composite sealing strip and the multi-point balanced locking mechanism.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows: A distribution box with a composite adaptive elastic sealing structure includes a box body and a door hinged thereon. The box body is provided with a door frame, and a sealing strip mounting structure is provided along the closed circumference of the door frame. A composite sealing strip is provided inside the sealing strip mounting structure. The composite sealing strip includes a rigid support member and an elastic sealing member wrapped around the rigid support member. The elastic sealing member forms a sealing lip protruding outward from the door frame. The sealing lip is configured to adaptively conform to the sealing surface of the door through its own elastic deformation when the door is closed, so as to form a main seal.

[0006] In some embodiments, the sealing strip mounting structure is a sealing groove provided on the door frame, and the composite sealing strip is detachably embedded in the sealing groove.

[0007] In some embodiments, the rigid support has a U-shaped or C-shaped structure with its opening facing the inside of the sealing groove; the circumferential surface of the rigid support is provided with a plurality of ribs, which are embedded in the interior of the elastic seal.

[0008] In some embodiments, both ends of the opening of the rigid support member extend vertically outward to form a limiting piece, and the two side walls of the sealing groove are correspondingly provided with limiting grooves for accommodating the limiting pieces. The composite sealing strip is fixed on the door frame by the snap-fit ​​cooperation between the limiting pieces and the limiting grooves.

[0009] In some embodiments, the rigid support is made of metal or high-strength engineering plastic; the elastic seal is made of EPDM rubber, silicone rubber or neoprene rubber.

[0010] In some embodiments, when the door is closed, the sealing lip, after being deformed under pressure, forms a continuous narrow-band surface contact sealing line with the sealing surface of the door.

[0011] In some embodiments, the door is provided with a multi-position linkage locking mechanism, which is configured to drive at least two locking members spaced apart circumferentially along the door to move synchronously in response to a drive operation, so as to apply a balanced clamping force synchronously at the at least two positions when the door is closed.

[0012] In some embodiments, the multi-position linkage locking mechanism specifically includes two locking elements configured in a two-point linkage form; it includes: a lock body installed on the door, the lock body having a rotatable drive shaft; a drive turntable fixedly connected to the end of the drive shaft; two locking rods serving as the locking elements and slidably disposed on the inner wall of the door in a vertical direction; two transmission links, one end of each transmission link being hinged to an eccentric position on the drive turntable, and the other end being hinged to a corresponding locking rod; and two locking slots correspondingly formed on the inner wall of the door; wherein, rotating the drive shaft can drive the drive turntable to rotate, and then through the transmission of the two transmission links, the two locking rods synchronously insert into or exit the corresponding locking slots, thereby realizing the linkage locking and unlocking of the door.

[0013] In some embodiments, the locking end of each locking bar is formed with a guide ramp, which is configured to guide the locking bar to slide smoothly into the corresponding locking groove during the closing of the door.

[0014] The beneficial effects of this utility model are as follows: When closed, the sealing lip of the composite sealing strip elastically deforms to conform to the door, forming an adaptive seal. It has high tolerance for processing and assembly tolerances of the door and frame, ensuring effective sealing even under slight deformation. The internal rigid support provides stable skeletal support for the elastic seal, preventing excessive compression and plastic deformation, ensuring the sealing lip maintains good resilience and sealing pressure over a long period. The mechanical fastening installation of the composite sealing strip is achieved through the snap-fit ​​between the limiting piece on the rigid support and the upper limit groove on the door frame, which is stronger and more durable than traditional adhesive methods. Combined with the multi-point linkage locking mechanism on the door, a balanced clamping force can be applied simultaneously on both sides (or multiple positions) of the door, ensuring uniform force distribution throughout the sealing circumference and avoiding uneven sealing caused by single-point locking, greatly improving overall sealing performance. The composite structure of the rigid support and elastic seal, along with the balanced force distribution, significantly slows down the aging and fatigue of the sealing material, extending the overall service life and maintenance cycle of the distribution box. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, obtaining other drawings based on these drawings without creative effort still falls within the scope of this utility model.

[0016] Figure 1 This is a front view of an embodiment of the present utility model;

[0017] Figure 2 This is a cross-sectional view of an embodiment of the present utility model;

[0018] Figure 3 for Figure 2 Enlarged view of section A. Detailed Implementation

[0019] To make the technical problem to be solved, the technical solution, and the beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this utility model and are not intended to limit this utility model.

[0020] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the invention. The terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0021] The directional and positional terms used in this utility model, such as up, down, front, back, left, right, inside, outside, top, bottom, side, etc., are only for reference to the accompanying drawings. Therefore, the directional and positional terms used are for the purpose of explaining and understanding this utility model, and not for limiting the scope of protection of this utility model.

[0022] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments:

[0023] like Figure 1-3 As shown, a distribution box with a composite adaptive elastic sealing structure includes a box body 1 and a door 2 hinged thereto. A door frame 11 is provided on the box body 1, and a sealing strip mounting structure 12 is provided on the door frame 11 along its closed circumference. A composite sealing strip 3 is provided within the sealing strip mounting structure 12. The composite sealing strip 3 includes a rigid support member 31 and an elastic sealing member 32 wrapped around the rigid support member 31. The elastic sealing member 32 forms a sealing lip 321 protruding outward from the door frame 11. The sealing lip 321 is configured to adaptively conform to the sealing surface of the door 2 through its own elastic deformation when the door 2 is closed, thereby forming a primary seal. By setting a composite sealing strip composed of a rigid support member and an elastic sealing member, and configuring an adaptively deformable sealing lip, the primary sealing effect is achieved. This structure combines the structural stability of rigid components with the sealing adaptability of elastic components, effectively compensating for manufacturing tolerances, installation errors, and slight deformation after long-term use between the box body and the door, significantly improving the reliability and durability of the seal. Meanwhile, the adaptive fit reduces the force required to close the door, improving the user experience. The sealing strip mounting structure 12 is a sealing groove set on the door frame 11, and the composite sealing strip 3 is detachably embedded in the sealing groove. By specifying the sealing strip mounting structure as a sealing groove and detachably embedding the composite sealing strip within it, the installation and replacement process of the sealing strip is greatly simplified. When the sealing strip is damaged due to aging, wear, or accidental damage, there is no need to replace the entire door frame or perform complex disassembly and repair; only the sealing strip needs to be replaced, effectively reducing subsequent maintenance costs and time, and improving the maintainability of the product.

[0024] like Figure 2 and 3As shown, the rigid support 31 has a U-shaped or C-shaped structure, with its opening facing the inside of the sealing groove. Multiple ribs 311 are provided on the circumferential surface of the rigid support 31, and these ribs 311 are embedded inside the elastic seal 32. The U-shaped or C-shaped rigid support, with its opening facing inward, facilitates its elastic opening to be clamped onto the relevant structure of the sealing groove, achieving initial fixation. The multiple ribs on the circumferential surface, embedded inside the elastic seal, greatly enhance the bonding strength and integrity between the rigid support and the elastic seal, preventing peeling, slippage, or detachment during use, ensuring that the composite sealing strip functions stably as a whole. Both ends of the opening of the rigid support 31 extend vertically outward to form limiting pieces 312. Limiting grooves 121 for accommodating the limiting pieces 312 are correspondingly provided on the two side walls of the sealing groove. The composite sealing strip 2 is fixed to the door frame 11 through the snap-fit ​​engagement between the limiting pieces 312 and the limiting grooves 121. By engaging the limiting piece at the end of the rigid support with the upper limiting groove on the side wall of the sealing groove, this mechanical interlocking structure effectively prevents the sealing strip from loosening, shifting, or falling off under long-term use, vibration, or temperature changes, ensuring the long-term stability of the sealing system and the continuity of the sealing effect. The rigid support 31 is made of metal or high-strength engineering plastic; the elastic sealing element 32 is made of EPDM rubber, silicone rubber, or neoprene rubber. The rigid support, made of metal or high-strength engineering plastic, ensures sufficient structural strength, shape retention, and deformation resistance, providing a stable skeleton support for the elastic sealing element. The elastic sealing element can be made of materials such as EPDM rubber, silicone rubber, or neoprene rubber, which typically possess excellent weather resistance (resistance to sunlight, ozone, and temperature changes), aging resistance, elasticity, and certain chemical resistance, thus ensuring the long-term effective sealing and service life of the sealing strip in various outdoor or industrial environments. When the door 2 is closed, the sealing lip 321, after being deformed under pressure, forms a continuous narrow-band surface contact sealing line with the sealing surface of the door 2. The sealing lip forms a continuous, narrow band of surface contact sealing line under pressure. This sealing method achieves high contact pressure with relatively low compressive force, effectively filling microscopic unevenness on the sealing surface, thus obtaining excellent sealing performance with low operating force and reducing closing resistance. At the same time, the narrow band of surface contact facilitates the recovery of elasticity after long-term pressure, reducing the risk of permanent deformation.

[0025] like Figure 2As shown, the door 2 is equipped with a multi-position linkage locking mechanism 4. The locking mechanism 4 is configured to drive at least two locking elements 41 spaced circumferentially along the door 2 to move synchronously in response to a driving operation, so as to apply a balanced clamping force synchronously at at least two positions when the door 2 is closed. By setting up a multi-position linkage locking mechanism and achieving synchronous action and balanced clamping at least two locking points under a single driving operation, it is ensured that the sealing strip is simultaneously and evenly clamped around the door when it is closed. This design avoids localized sealing defects (especially at corners far from the lock) caused by single-point locking or uneven clamping force, significantly improving the uniformity and overall sealing performance of the entire door seal. The multi-position linkage locking mechanism 4 specifically includes two locking elements 41, configured as a two-point linkage; it includes: a lock body 42 installed on the door 2, the lock body 42 having a rotatable drive shaft 421; a drive turntable 43 fixedly connected to the end of the drive shaft 421; two locking rods, serving as locking elements 41, slidably disposed vertically on the inner wall of the door 2; two transmission links 44, one end of each transmission link 44 hinged to an eccentric position on the drive turntable 43, and the other end hinged to a corresponding locking rod; and two locking slots 13 correspondingly formed on the inner wall of the box body 1; wherein, rotating the drive shaft 421 can drive the drive turntable 43 to rotate, and then through the transmission of the two transmission links 44, the two locking rods synchronously insert or exit the corresponding locking slots 13, thereby realizing the linkage locking and unlocking of the door 2. This multi-position linkage locking mechanism converts rotational motion into linear motion and achieves single-input multi-output synchronous action through a linkage mechanism. Its structure is relatively simple and reliable, easy to manufacture and assemble, and can achieve synchronous and balanced locking and unlocking of the door at two points with low manufacturing cost. It is convenient to operate and has stable locking force. Each locking rod has a guide slope 411 at its locking end, which is configured to guide the locking rod smoothly into the corresponding locking groove 13 during the closing process of the door 2. The guide slope at the locking end of the locking rod allows it to smoothly and easily slide into the locking groove during the final stage of door closing, automatically correcting even minor alignment deviations between the door and the cabinet. This significantly reduces the requirements for operational precision, making the closing and locking process smoother and less strenuous, reducing impact, wear, or component damage caused by forced closing, and improving the product's usability and durability.

[0026] This invention utilizes the self-adaptive seal formed by the elastic deformation of the sealing lip of the composite sealing strip to conform to the door when closed. It exhibits high tolerance for machining and assembly tolerances of the door and frame, ensuring effective sealing even under slight deformation. Internal rigid supports provide stable skeletal support for the elastic seal, preventing excessive compression and plastic deformation, thus ensuring the sealing lip maintains good resilience and sealing pressure over the long term. The mechanical fastening of the composite sealing strip is achieved through the interlocking of the limiting piece on the rigid support with the upper limit groove on the door frame, resulting in a stronger and more durable installation than traditional adhesive methods. Combined with a multi-point linkage locking mechanism on the door, balanced pressure can be applied simultaneously to both sides (or multiple locations) of the door, ensuring uniform force across the entire sealing circumference and avoiding uneven sealing caused by single-point locking, significantly improving overall sealing performance. The composite structure of the rigid support and elastic seal, along with the balanced force distribution, significantly slows down the aging and fatigue of the sealing material, extending the overall service life and maintenance cycle of the distribution box.

[0027] The above description is only one embodiment of the present utility model and is not intended to limit the scope of protection of the present utility model; the scope of protection of the present utility model is defined by the claims in the claims, and all equivalent changes and modifications made in accordance with the utility model are within the scope of protection of the present utility model patent.

Claims

1. A distribution box with a composite adaptive elastic sealing structure, comprising a box body and a door hinged thereto, wherein the box body is provided with a door frame, characterized in that: A sealing strip mounting structure is provided along the closed circumference of the upper edge of the door frame, and a composite sealing strip is provided within the sealing strip mounting structure. The composite sealing strip includes a rigid support member and an elastic sealing member wrapped around the rigid support member. The elastic sealing member forms a sealing lip that protrudes outward from the door frame. The sealing lip is configured to adaptively conform to the sealing surface of the door through its own elastic deformation when the door is closed, so as to form a main seal.

2. The distribution box with a composite adaptive elastic sealing structure according to claim 1, characterized in that: The sealing strip installation structure is a sealing groove provided on the door frame, and the composite sealing strip is detachably embedded in the sealing groove.

3. The distribution box with a composite adaptive elastic sealing structure according to claim 2, characterized in that: The rigid support has a U-shaped or C-shaped structure with its opening facing the inside of the sealing groove; the circumferential surface of the rigid support is provided with a plurality of ribs, which are embedded in the interior of the elastic seal.

4. The distribution box with a composite adaptive elastic sealing structure according to claim 3, characterized in that: Both ends of the opening of the rigid support member extend vertically outward to form a limiting piece. The two sides of the sealing groove are provided with limiting grooves for accommodating the limiting pieces. The composite sealing strip is fixed on the door frame by the snap-fit ​​cooperation between the limiting pieces and the limiting grooves.

5. The distribution box with a composite adaptive elastic sealing structure according to any one of claims 1 to 4, characterized in that: The rigid support is made of metal or high-strength engineering plastic; the elastic seal is made of EPDM rubber, silicone rubber or neoprene rubber.

6. The distribution box with a composite adaptive elastic sealing structure according to claim 1, characterized in that: When the door is closed, the sealing lip deforms under pressure and forms a continuous narrow surface contact sealing line with the sealing surface of the door.

7. The distribution box with a composite adaptive elastic sealing structure according to claim 1, characterized in that: The door is provided with a multi-position linkage locking mechanism, which is configured to drive at least two locking members spaced apart along the circumference of the door to move synchronously in response to a drive operation, so as to apply a balanced clamping force at the at least two positions simultaneously when the door is closed.

8. The distribution box with a composite adaptive elastic sealing structure according to claim 7, characterized in that: The multi-position linkage locking mechanism specifically includes two locking elements, which are configured as a two-point linkage. It includes: a lock body installed on the door, the lock body having a rotatable drive shaft; a drive turntable fixedly connected to the end of the drive shaft; two locking rods that serve as locking elements and are slidably disposed on the inner wall of the door in a vertical direction; two transmission links, one end of each transmission link being hinged to an eccentric position on the drive turntable, and the other end being hinged to a corresponding locking rod; and two locking slots correspondingly formed on the inner wall of the door; wherein, rotating the drive shaft can drive the drive turntable to rotate, and then through the transmission of the two transmission links, the two locking rods can be synchronously inserted into or withdrawn from the corresponding locking slots, thereby realizing the linkage locking and unlocking of the door.

9. The distribution box with a composite adaptive elastic sealing structure according to claim 8, characterized in that: Each of the locking rods has a guide ramp at its locking end, which is configured to guide the locking rod smoothly into the corresponding locking groove during the closing of the door.

Images