A power distribution box with adjustable volume
By combining a nested upper and lower box structure with a lifting transmission component, the volume of the distribution box can be adjusted precisely and effortlessly, solving the problems of cumbersome operation and poor stability of traditional spliced distribution boxes, and improving the service life and safety of the distribution box.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ZHEJIANG FEIWO ELECTRIC CO LTD
- Filing Date
- 2026-05-21
- Publication Date
- 2026-06-26
AI Technical Summary
The existing modular height-adjustable distribution box relies on manual pushing for height adjustment, which is cumbersome, unstable, prone to jamming and tilting, and lacks precision. It is also prone to displacement and sliding due to simple buckle positioning. Long-term adjustment exacerbates the wear of the guide rail, affecting its service life and electrical safety, making it difficult to adapt to high-requirement scenarios.
It adopts a nested upper and lower box structure, combined with a lifting transmission component, a rocker assembly, and a positioning locking component. The rotational motion of the rocker assembly is converted into the linear lifting motion of the upper box, and the positioning locking component fixes the position of the upper and lower boxes after reaching the target height, thus achieving labor-saving and precise adjustment of the volume.
It improves the convenience, stability and electrical safety of volume adjustment, adapts to the dynamic power distribution needs of various scenarios such as industry and commerce, solves the problems of laborious, jammed and displaced traditional manual adjustment, and enhances structural stability and sealing performance.
Smart Images
Figure CN224418267U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of distribution box technology, and more particularly to a distribution box with adjustable volume. Background Technology
[0002] A distribution box is a closed or semi-closed metal box that integrates electrical components such as switches, circuit breakers, fuses, and metering instruments. It is the core terminal equipment for power distribution, control, and protection in a power distribution system. It is mainly used to distribute the power from the upstream power source to each power branch and to monitor and protect the branch circuits.
[0003] Currently, a Chinese utility model patent application with a publication date of April 11, 2025, and publication number CN222749934U, discloses a modular height-adjustable distribution box, including a box body and an adjustment structure. The box body includes an upper box body and a lower box body that are spliced together. The lower part of the inner side wall of the upper box body has an inverted L-shaped upper splicing interface, and the upper part of the outer side wall of the lower box body has an L-shaped lower splicing interface that matches the side wall of the upper splicing interface. The adjustment structure includes an adjustment rod and a fixing block. The upper part of the adjustment rod is rotatably connected to the lower part of the outer side wall of the upper box body through a mounting component. The fixing block has a vertically penetrating adjustment port, through which the adjustment rod passes and can move up and down relative to the adjustment port. The fixing block is provided with a fixing component. This utility model facilitates the adjustment of the size of the space formed by the upper and lower box bodies, thereby allowing for flexible adjustment of the internal space size of the box according to the specifications of electrical components or the need to add other components, resulting in high overall practicality.
[0004] The modular height-adjustable distribution box in related technologies has significant drawbacks in practical use. Its height adjustment relies entirely on manual pushing of the upper box to raise or lower it. The operation process is cumbersome and extremely unstable. During adjustment, one or two people need to lift the upper box and move it slowly. This is not only labor-intensive but also makes it difficult to ensure even force distribution, which can easily lead to jamming and tilting. As a result, the adjustment accuracy is insufficient, and it is impossible to quickly and accurately position it to the target height. During the pushing process, the upper and lower boxes are prone to misalignment and displacement, and the gap at the joint is inconsistent, affecting the overall sealing and structural strength. After adjustment, it is only positioned by simple buckles. It is easily displaced and slides due to equipment vibration, external collisions, and its own weight. This may not only cause loose internal wiring and poor contact of components but also pose safety hazards. Long-term repeated manual adjustment will also accelerate the wear of the guide rails at the joint, gradually increase the gap, and further reduce stability, seriously affecting the service life and electrical safety of the distribution box. It is difficult to adapt to industrial and commercial scenarios with high requirements for adjustment accuracy and stability.
[0005] Therefore, it is necessary to propose a distribution box with adjustable volume to solve the above problems. Utility Model Content
[0006] This application provides a volume adjustable distribution box to improve upon the technical problems of the spliced height adjustable distribution box in the related technology, which relies on manual pushing of the upper box to raise and lower the height. The operation is cumbersome, the stability is poor, it is easy to jam and tilt, and the accuracy is insufficient. It only relies on simple buckle positioning, which is easy to shift and slide down. Long-term adjustment aggravates the wear of the guide rail, affecting the service life and electrical safety, and it is difficult to adapt to high-requirement scenarios.
[0007] This application provides an adjustable volume distribution box, including a lower box and an upper box that can be nested and telescopically disposed within the lower box. A lifting transmission assembly is provided between the lower box and the upper box, and a rocker assembly is pulsatorically connected to the lifting transmission assembly. The rocker assembly is used to receive rotational operating force and transmit it to the lifting transmission assembly.
[0008] The lifting transmission assembly can convert the rotational motion of the rocker assembly into the linear lifting motion of the upper housing, so as to adjust the overall height of the distribution box;
[0009] It also includes a positioning and locking component, which is used to fix the relative position of the upper box and the lower box after the upper box is adjusted to the target height.
[0010] The technical solutions described above in this application embodiment have at least the following technical effects: by combining nested housings, lifting transmission, rocker operation and positioning locking components, the volume can be adjusted with effort and precision, solving the problems of laborious, jammed and shifted traditional manual adjustment, improving the convenience, stability and electrical safety of volume adjustment, and adapting to the dynamic power distribution needs of multiple scenarios such as industry and commerce.
[0011] In this embodiment, the lifting transmission assembly includes a rack with a fixed frame sleeved inside the fixed frame. The rack is arranged along the height direction of the lower housing and is fixedly connected to the upper housing above it. The rocker assembly is fixedly connected to the fixed frame and meshes with the rack.
[0012] Through this technical solution, the lifting transmission assembly achieves precise and efficient transmission of the rocker arm to the upper and lower housing by means of the fixed frame, directional rack and pinion and meshing structure. This ensures that the upper housing can extend and retract smoothly in the preset direction, solving the problems of transmission offset and jamming in traditional adjustment, and improving the stability and accuracy of volume adjustment.
[0013] In this embodiment, the rocker assembly includes a rocker body and a pinion gear disposed on the rocker body and driven by the rack. Rotating the rocker body can drive the pinion gear to rotate, thereby driving the rack and the upper housing to rise and fall.
[0014] Through this technical solution, the rocker assembly achieves precise transmission for lifting and lowering the housing with minimal effort by cooperating with the rocker body and the meshing pinion, ensuring smooth extension and retraction of the upper housing. This solves the problems of laborious adjustment and transmission misalignment in traditional methods, and improves the convenience and accuracy of volume adjustment.
[0015] In this embodiment, a synchronous guide assembly is provided between the lower housing and the upper housing, and is symmetrically arranged with the lifting transmission assembly. The synchronous guide assembly includes a fixed guide rail extending along the height direction and a slider adapted to the fixed guide rail. The guide rail and the slider are respectively located in the lower housing and the upper housing.
[0016] Through this technical solution, the synchronous guide component provides precise guidance and force balance for the lifting and lowering of the box through a symmetrically arranged guide rail slider structure. In conjunction with the lifting transmission component, it realizes the smooth extension and retraction of the upper box, solving the tilting and jamming problems of traditional adjustment, and improving the synchronization and structural stability of volume adjustment.
[0017] In this embodiment, the positioning and locking assembly includes an array of fixing holes on the lower housing, and a set of connecting holes are provided on the upper housing at positions corresponding to the fixing holes. When the fixing holes and connecting holes are aligned, the relative displacement between the upper housing and the lower housing is fixed by bolts.
[0018] This technical solution enables precise positioning of the housing in multiple positions through an array of fixing holes and a bolt locking structure. Combined with the transmission and guide components, it securely fixes the housing position, solving the problems of easy displacement and unreliable fixation in traditional adjustment methods, and improving the positioning accuracy and structural safety of volume adjustment.
[0019] In this embodiment, the fixing hole has a heat dissipation function, and a rain shield is also provided on the upper housing.
[0020] This technical solution, through the dual functions of fixed hole positioning and heat dissipation, and the rainproof protection of the rain shield, ensures the positioning reliability of volume adjustment and improves the heat dissipation and outdoor protection capabilities of the enclosure without adding extra structures. It solves the problems of traditional distribution boxes that require additional heat dissipation holes and have insufficient rainproof performance, thus enhancing practicality and environmental adaptability.
[0021] Beneficial Effects: The beneficial effects of this patent are mainly reflected in the convenience of volume adjustment, structural stability, functional integration, and scenario adaptability. It comprehensively solves the core pain points of traditional spliced height-adjustable distribution boxes. Through nested upper and lower boxes combined with lifting transmission components, the rocker body reduces the operating force by lever characteristics. The meshing transmission of pinion and rack precisely converts rotational motion into linear lifting, replacing traditional manual lifting and avoiding jamming caused by uneven force. The symmetrical layout of the synchronous guide components and the sliding cooperation of the guide rail and slider limit the lifting trajectory, balance the force on both sides, effectively prevent the upper box from tilting and misaligning, and greatly improve the adjustment accuracy and smoothness. Attached Figure Description
[0022] Figure 1 A three-dimensional structural diagram of the adjustable-volume distribution box provided in the embodiments of this application. Figure 1 ;
[0023] Figure 2 A three-dimensional structural diagram of the adjustable-volume distribution box provided in the embodiments of this application. Figure 2 ;
[0024] Figure 3 A three-dimensional structural diagram of the lifting transmission assembly and the rocker assembly provided in the embodiments of this application;
[0025] Figure 4 An exploded view of the adjustable-volume distribution box provided in an embodiment of this application;
[0026] The following are the labeling elements in the figure:
[0027] 1. Lower housing; 2. Upper housing; 3. Lifting transmission assembly; 31. Fixing frame; 32. Rack; 4. Rocker assembly; 41. Rocker body; 42. Pinion; 5. Positioning and locking assembly; 51. Fixing hole; 52. Connecting hole; 53. Bolt; 6. Synchronous guide assembly; 61. Fixed guide rail; 62. Slider; 7. Rain guard. Detailed Implementation
[0028] The modular height-adjustable distribution box in related technologies has significant drawbacks in practical use. Its height adjustment relies entirely on manual pushing of the upper box to raise or lower it. The operation process is cumbersome and extremely unstable. During adjustment, one or two people need to lift the upper box and move it slowly. This is not only labor-intensive but also makes it difficult to ensure even force distribution, which can easily lead to jamming and tilting. As a result, the adjustment accuracy is insufficient, and it is impossible to quickly and accurately position it to the target height. During the pushing process, the upper and lower boxes are prone to misalignment and displacement, and the gap at the joint is inconsistent, affecting the overall sealing and structural strength. After adjustment, it is only positioned by simple buckles. It is easily displaced and slides due to equipment vibration, external collisions, and its own weight. This may not only cause loose internal wiring and poor contact of components but also pose safety hazards. Long-term repeated manual adjustment will also accelerate the wear of the guide rails at the joint, gradually increase the gap, and further reduce stability, seriously affecting the service life and electrical safety of the distribution box. It is difficult to adapt to industrial and commercial scenarios with high requirements for adjustment accuracy and stability.
[0029] Based on this, in order to improve the technical problems existing in the related technology, such as the splicing height-adjustable distribution box, which relies on manual pushing of the upper box to raise and lower the height, is cumbersome to operate, has poor stability, is prone to jamming and tilting, lacks precision, relies only on simple buckle positioning, is prone to displacement and sliding, and long-term adjustment aggravates the wear of the guide rail, affecting the service life and electrical safety, and is difficult to adapt to high-requirement scenarios, the embodiments of this application provide the following solution.
[0030] Please refer to the following: Figures 1 to 4 This application provides an adjustable volume distribution box, which includes a lower box 1, an upper box 2 that can be nested and telescopically arranged inside the lower box 1, a lifting transmission assembly 3 between the lower box 1 and the upper box 2, and a rocker assembly 4 that is connected to the lifting transmission assembly 3. The rocker assembly 4 is used to receive rotational operating force and transmit it to the lifting transmission assembly 3.
[0031] The lifting transmission assembly 3 can convert the rotational motion of the rocker assembly 4 into the linear lifting motion of the upper housing 2 to adjust the overall height of the distribution box;
[0032] It also includes a positioning and locking component 5, which is used to fix the relative position of the upper box 2 and the lower box 1 after the upper box 2 is adjusted to the target height.
[0033] The adjustable-volume distribution box provided in this embodiment comprises a nested, telescopic upper box 2 and a lower box 1: serving as the basic structure for volume adjustment, enabling expansion of the box's vertical space, providing a structural carrier for adjustable volume, and adapting to the accommodating needs of different components; a lifting transmission assembly 3: converting the rotational motion of the rocker assembly 4 into linear lifting motion, replacing manual lifting adjustment, avoiding jamming and tilting caused by uneven force, and improving the accuracy of volume adjustment; a rocker assembly 4: serving as the operation input end, transmitting rotational operating force through a transmission connection, reducing the force intensity of adjustment operation by lever characteristics, and improving the convenience of volume adjustment; and a positioning locking assembly 5: fixing the relative position of the upper and lower boxes 1 after adjustment, preventing displacement and sliding caused by equipment vibration or external collisions, ensuring the structural stability of the box and electrical safety.
[0034] The components are connected to form a complete volume adjustment system for operation, transmission, adjustment, and locking: the operating force of the rocker assembly 4 is precisely transmitted through the lifting transmission assembly 3, driving the nested upper and lower housings 1 to extend and retract smoothly, avoiding the jamming and misalignment problems of traditional manual adjustment; the positioning and locking assembly 5 connects to the end of the adjustment action and locks immediately after the lifting and lowering is in place, realizing a continuous action of adjustment and fixation, which not only ensures the accuracy of volume adjustment, but also strengthens the overall structural strength and sealing performance of the housing, solving the pain points of poor stability and low safety of traditional spliced adjustment.
[0035] In this embodiment, the lifting transmission assembly 3 includes a rack 32 fitted inside a fixed frame 31. The rack 32 is arranged along the height direction of the lower housing 1 and is fixedly connected to the upper housing 2 above it. The rocker assembly 4 is fixedly connected to the fixed frame 31 and meshes with the rack 32.
[0036] With this configuration, the fixed bracket 31 connects the lower housing 1 and the transmission components, providing a stable mounting reference for the rack 32 and rocker assembly 4. The rack 32 connects to the upper housing 2 along the height direction, converting the transmission power into the lifting and lowering action of the upper housing 2. The meshing structure of the rocker assembly 4 and the rack 32 connects the operation input end and the transmission link. The three work together to enable the rotation operation of the rocker to drive the rack 32 to smoothly extend and retract the upper housing 2 along the height direction of the lower housing 1 through meshing transmission. This avoids the jamming and tilting problems of traditional manual adjustment, while strengthening the connection between the transmission system and the housing structure, and improving the accuracy of volume adjustment and structural compactness.
[0037] In this embodiment, the rocker assembly 4 includes a rocker body 41 and a pinion 42 disposed on the rocker body 41 and driven by the rack 32. Rotating the rocker body 41 can drive the pinion 42 to rotate, thereby driving the rack 32 and the upper housing 2 to rise and fall.
[0038] With this configuration, the joystick body 41 is connected to the user's operating end, and the pinion 42 is connected to the rack 32 of the lifting transmission component 3. The two work together to allow the rotation of the joystick body 41 to be directly driven by the meshing of the pinion 42 and the rack 32, which in turn drives the upper housing 2 to rise and fall along the height direction of the lower housing 1. At the same time, the meshing structure of the pinion 42 and the rack 32 connects the joystick component 4 and the lifting transmission component 3, ensuring the precise transmission of operating force to lifting power. This avoids the problems of jamming and uneven force distribution in traditional manual adjustment, strengthens the structural linkage between the operating end, the transmission end, and the lifting end of the housing, and improves the stability and controllability of volume adjustment.
[0039] In this embodiment, a synchronous guide assembly 6 is provided between the lower housing 1 and the upper housing 2, and is symmetrically arranged with the lifting transmission assembly 3. The synchronous guide assembly 6 includes a fixed guide rail 61 extending along the height direction and a slider 62 adapted to the fixed guide rail 61. The guide rail and the slider 62 are respectively provided in the lower housing 1 and the upper housing 2.
[0040] With this configuration, the synchronous guide component 6 and the lifting transmission component 3 are symmetrically arranged to form a double-sided support structure. The fixed guide rail 61 and the slider 62 are respectively connected to the lower and upper housings 2, forming a linkage with the power transmission of the lifting transmission component 3. This allows the upper housing 2 to slide precisely along the guide rail when driven to lift by the rack 32, avoiding the tilting and jamming problems caused by uneven force in traditional adjustment. At the same time, it enhances the connection stability of the upper and lower housings 1. In conjunction with the positioning and locking component 5, it further improves the structural rigidity and sealing performance of the housing after extension and retraction, ensuring that the overall adjustment process is stable and controllable.
[0041] In this embodiment, the positioning and locking component 5 includes a series of fixing holes 51 on the lower housing 1, and a set of connecting holes 52 on the upper housing 2 corresponding to the fixing holes 51. When the fixing holes 51 and the connecting holes 52 are aligned, the relative displacement between the upper housing 2 and the lower housing 1 is fixed by bolts 53.
[0042] With this configuration, the positioning and locking component 5 connects the lifting and adjusting mechanism with the cabinet fixing mechanism. The array fixing holes 51, in conjunction with the precise guidance of the synchronous guide component 6, ensure that the connecting holes 52 and fixing holes 51 quickly align after the upper cabinet 2 is raised or lowered. The bolt fixing structure, lifting transmission component 3, and synchronous guide component 6 work together to lock the relative position immediately after the cabinet is smoothly adjusted to the target height, solving the problem of easy loosening and displacement of traditional buckle fixing. At the same time, it strengthens the connection rigidity of the upper and lower cabinets 1. In conjunction with the nested structure and synchronous guide component 6, it further improves the structural stability of the cabinet after locking, ensuring electrical safety.
[0043] In this embodiment, the fixing hole 51 has a heat dissipation function, and a rain shield 7 is also provided on the upper housing 2.
[0044] With this configuration, the heat dissipation function of the fixing holes 51 is adapted to the volume adjustment of the enclosure. No matter what height the upper enclosure 2 is raised or lowered, an air circulation channel can be formed through the array of fixing holes 51 to dissipate the working heat of the internal components in a timely manner, without affecting the reliability of the bolts 53 locking. The rain shield 7 is connected to the nested upper and lower enclosure 1 structure and is raised and lowered synchronously with the upper enclosure 2, always covering the top of the enclosure and the joint gap. With the sealing assistance of the synchronous guide component 6, the overall rain protection of the enclosure is strengthened while ensuring the flexibility of the raising and lowering adjustment. Together with the positioning lock and transmission guide component, the stability of the distribution box in outdoor and humid environments is improved.
[0045] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.
Claims
1. A volume-adjustable distribution box comprising a lower box body (1) and an upper box body (2) which is nestably telescoped in the lower box body (1), characterized in that: A lifting transmission assembly (3) is provided between the lower housing (1) and the upper housing (2), and a rocker assembly (4) is connected to the lifting transmission assembly (3) for transmission. The rocker assembly (4) is used to receive rotational operating force and transmit it to the lifting transmission assembly (3). The lifting transmission assembly (3) can convert the rotational motion of the rocker assembly (4) into the linear lifting motion of the upper box (2) to adjust the overall height of the distribution box; It also includes a positioning locking component (5), which is used to fix the relative position of the upper box (2) and the lower box (1) after the upper box (2) is adjusted to the target height.
2. The adjustable-volume distribution box according to claim 1, characterized in that: The lifting transmission assembly (3) includes a rack (32) fitted inside a fixed frame (31). The rack (32) is arranged along the height direction of the lower housing (1) and is fixedly connected to the upper housing (2) above it. The rocker assembly (4) is fixedly connected to the fixed frame (31) and meshes with the rack (32).
3. The adjustable-volume distribution box according to claim 2, characterized in that: The rocker assembly (4) includes a rocker body (41) and a pinion (42) mounted on the rocker body (41) and driven by the rack (32). Rotating the rocker body (41) can drive the pinion (42) to rotate, thereby driving the rack (32) to lift and lower the upper housing (2).
4. The adjustable-volume distribution box according to claim 3, characterized in that: A synchronous guide assembly (6) is provided between the lower housing (1) and the upper housing (2), and is symmetrically arranged with the lifting transmission assembly (3). The synchronous guide assembly (6) includes a fixed guide rail (61) extending along the height direction and a slider (62) adapted to the fixed guide rail (61). The guide rail and the slider (62) are respectively located in the lower housing (1) and the upper housing (2).
5. The adjustable-volume distribution box according to claim 1, characterized in that: The positioning and locking assembly (5) includes an array of fixing holes (51) on the lower housing (1), and a set of connecting holes (52) are provided on the upper housing (2) at the position corresponding to the fixing holes (51). When the fixing holes (51) and connecting holes (52) are aligned, the relative displacement of the upper housing (2) and the lower housing (1) is fixed by bolts (53).
6. The adjustable-volume distribution box according to claim 5, characterized in that: The fixing hole (51) has a heat dissipation function, and the upper box (2) is also provided with a rain shield (7).