Single-layer stainless steel cabinet body locking structure
Patent Information
- Application Number
- CN202522283295.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-10-29
- Publication Date
- 2026-10-09
- Estimated Expiration
- 2035-10-29
AI Technical Summary
[0004]本实用新型要解决的技术问题是克服现有传统对锁螺丝组件在单层不锈钢柜体连接中易导致侧板变形、影响美观的缺陷，提供一种专为单层不锈钢柜体设计的对锁结构，在保证柜体连接力度的同时，确保柜体表面平整、美观
1、本实用新型通过带头三阶限高螺丝的三阶阶梯结构与带头圆柱形固定长度螺母的固定长度设计，二者在对锁紧固过程中形成固定的紧固行程。当对锁操作达到预设的安装力度时，三阶阶梯结构与固定长度螺母相互限位，阻止螺丝继续拧入，从而精准控制紧固力的大小，既保证了两个单层不锈钢柜体之间稳定可靠的连接力度，又有效避免了因紧固力过大导致单层不锈钢柜体侧板（背面中空、无支撑）正面受力变形的问题，保障柜体结构稳定性。
Smart Images
Figure CN224835727U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of stainless steel cabinet structure, specifically a single-layer stainless steel cabinet interlocking structure. Background Technology
[0002] In the field of stainless steel furniture manufacturing and assembly, a complete set of stainless steel furniture typically consists of multiple independent cabinets. To ensure the overall structural stability, uniformity of gaps, and support strength after the cabinets are assembled, the cabinets must be fixed together using a reliable connection structure. Currently, the commonly used cabinet connection solution in the industry is the use of locking screw assemblies. The core of this solution is to achieve a tight connection between two cabinets through the cooperation of screws and nuts, making it a key connecting component in the stainless steel furniture assembly process.
[0003] However, the mainstream locking screw assemblies currently available on the market typically consist of a headed full-thread screw and a headed cylindrical nut. While these assemblies are effective in connecting wooden or double-layered stainless steel cabinets, ensuring stability, they are less suitable for single-layered stainless steel cabinets. Since the side panels of a single-layer stainless steel cabinet are hollow and lack sufficient support, the tightening force of the screws directly impacts the front of the side panel when using traditional locking screw assemblies. This concentrated force causes dents and deformation, severely damaging the cabinet's appearance and potentially affecting its structural stability, thus failing to meet the connection requirements of single-layered stainless steel cabinets. Therefore, there is an urgent need to develop a locking structure for single-layered stainless steel cabinets. Utility Model Content
[0004] The technical problem to be solved by this utility model is to overcome the defects of existing traditional locking screw assemblies that easily lead to side panel deformation and affect the appearance in the connection of single-layer stainless steel cabinets. It provides a locking structure specially designed for single-layer stainless steel cabinets, which ensures the connection strength of the cabinet while ensuring that the cabinet surface is flat and beautiful.
[0005] To achieve the above objectives, this utility model provides the following technical solution: a single-layer stainless steel cabinet locking structure, comprising a headed three-stage height-limiting screw, a headed cylindrical fixed-length nut, and a single-layer stainless steel cabinet side plate. The headed three-stage height-limiting screw includes a first-stage rod, a second-stage rod, a third-stage rod, and a screw head. The outer surface of the third-stage rod is provided with an external thread. The headed cylindrical fixed-length nut includes a fixed-length nut rod and a nut head. The outer periphery of the fixed-length nut rod is cylindrical. Inside the fixed-length nut rod, away from the nut head, is a hollow cylinder. The height of the hollow cylinder is less than the height of the main cylinder. The surface of the hollow cylinder is provided with an internal thread. The length of the internal thread is slightly greater than the length of the external thread. The external thread matches the internal thread. The single-layer stainless steel cabinet side plate includes a first side plate and a second side plate. Countersunk heads are provided at corresponding positions on the first and second side plates. The diameters of the screw head and the nut head are both adapted to the diameter of the countersunk head.
[0006] The length of the internal thread is slightly greater than the length of the external thread to ensure that the threads can fully engage, while avoiding loosening of the connection due to insufficient thread length; the tooth profile and pitch of the internal thread and the external thread are perfectly matched to ensure the fit accuracy and connection strength.
[0007] Furthermore, the countersunk head adopts a stepped hole structure, with the large hole diameter matching the diameter of the screw head and the nut head, and the small hole diameter matching the diameter of the second-stage rod body, ensuring that the rod body can smoothly pass through the side plate, while avoiding the side plate from shaking during assembly.
[0008] Furthermore, both the screw head and the nut head adopt a hexagonal head structure, and the height of the screw head and the nut head is consistent with the depth of the countersunk head, so that they can be completely embedded in the countersunk head and are flush with the surfaces of the first side plate and the second side plate.
[0009] Furthermore, a toothed groove is provided at the connection between the second-stage rod body and the third-stage rod body. The toothed groove is used to remove chips during thread processing to prevent thread jamming, and at the same time forms a "stepped limiting surface".
[0010] Furthermore, a hollow cone is provided on a section of the hollow cylinder near the head of the nut.
[0011] Furthermore, the diameter of the third-order rod is larger than the diameter of the second-order rod, but smaller than the diameter of the first-order rod.
[0012] Assembly principle of this utility model: Pre-positioning: Insert the headed three-stage height limiting screw into the countersunk part of the first side plate, so that the screw head is fully embedded in the large hole of the countersunk part, the second stage rod passes through the small hole of the countersunk part, and the third stage rod extends out of the inside of the first side plate (towards the second side plate). Thread alignment: Align the second side plate with the first side plate, align the third-stage rod of the headed three-stage height limiting screw with the small hole in the countersunk position of the second side plate, and then insert the headed cylindrical fixed-length nut into the third-stage rod from the countersunk position side of the second side plate, so that the external thread of the third-stage rod and the internal thread of the nut are initially engaged. Tightening and Limiting: Use a wrench to fix the screw head and nut head respectively, and rotate to tighten to the preset force. As the tightening process proceeds, the three-stage height-limiting screw with head moves towards the nut. When the countersunk end face at the connection between the second and third stage rods is in contact with the inner side of the first side plate, and the nut head is fully embedded in the countersunk part of the second side plate and in contact with the side plate surface, the two form a bidirectional mechanical limit, preventing the screw from being tightened further. At this time, the tightening force reaches the preset safety range. Surface flatness guarantee: After assembly, the screw heads and nut heads are fully accommodated in the countersunk head and remain flush with the outer surfaces of the first and second side plates, without any protrusions or depressions.
[0013] Compared with the prior art, the beneficial effects of this utility model are: 1. This utility model utilizes a three-tiered structure with a headed three-stage height-limiting screw and a fixed-length design with a headed cylindrical fixed-length nut. These two components create a fixed tightening stroke during the locking process. When the locking operation reaches the preset installation force, the three-tiered structure and the fixed-length nut mutually limit each other, preventing the screw from being tightened further. This precisely controls the tightening force, ensuring a stable and reliable connection between the two single-layer stainless steel cabinets. It also effectively avoids deformation of the front of the single-layer stainless steel cabinet side panel (hollow on the back, without support) due to excessive tightening force, thus ensuring the structural stability of the cabinet.
[0014] 2. This utility model has a countersunk head position pre-set on the side plate of the single-layer stainless steel cabinet to match the screw head and nut head. After the locking structure is installed, the head of the headed three-stage height limiting screw and the head of the headed cylindrical fixed length nut can be completely accommodated in the countersunk head position and remain flush with the surface of the cabinet side plate. This makes the surface of the assembled cabinet flat and without protrusions, completely solving the appearance defects caused by the protrusion of the traditional locking screw head and significantly improving the appearance of the single-layer stainless steel cabinet. Attached Figure Description
[0015] Figure 1 is a schematic diagram of the screw structure in an embodiment of this utility model; Figure 2 is a schematic diagram of the connection between the locking screw and the stainless steel cabinet in an embodiment of this utility model; Figure 3 is a schematic cross-sectional view of the screws and the interior of the stainless steel cabinet in an embodiment of this utility model; In the diagram: 1-Height limiting screw with head, 11-First stage rod, 12-Second stage rod, 13-Third stage rod, 14-Screw head, 15-Unthreaded groove, 2-Cylindrical fixed-length nut with head, 21-Fixed-length nut rod, 22-Nut head, 23-Hollow cylinder, 231-Hollow cone, 3-Single-layer stainless steel cabinet side panel, 31-First side panel, 32-Second side panel, 33-Counterhead. Detailed Implementation
[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0017] For examples, please refer to Figures 1 to 3 This utility model provides a technical solution: a single-layer stainless steel cabinet locking structure, including a headed three-stage height limiting screw 1, a headed cylindrical fixed-length nut 2, and a single-layer stainless steel cabinet side plate 3. The headed three-stage height limiting screw 1 includes a first-stage rod 11, a second-stage rod 12, a third-stage rod 13, and a screw head 14. The outer surface of the third-stage rod 13 is provided with an external thread. The headed cylindrical fixed-length nut 2 includes a fixed-length nut rod 21 and a nut head 22. The outer circumference of the fixed-length nut rod 21 is cylindrical. A hollow cylinder 23 is provided inside the fixed-length nut rod 21 away from the nut head 22. The height of the hollow cylinder 23 is less than the height of the cylinder. An internal thread is provided on the surface of the hollow cylinder 23. The length of the internal thread is slightly greater than the length of the external thread. The external thread matches the internal thread. The single-layer stainless steel cabinet side plate 3 includes a first side plate 31 and a second side plate 32. Countersunk head 33 is provided at corresponding positions of the first side plate 31 and the second side plate 32. The diameters of the screw head 14 and the nut head 22 are both adapted to the diameter of the countersunk head 33.
[0018] The length of the internal thread is slightly longer than that of the external thread to ensure that the threads can fully engage, while avoiding loosening of the connection due to insufficient thread length; the tooth profile and pitch of the internal thread and the external thread are perfectly matched to ensure the fit accuracy and connection strength.
[0019] The countersunk head 33 adopts a stepped hole structure. The diameter of the large hole is adapted to the diameter of the screw head 14 and the nut head 22, and the diameter of the small hole is adapted to the diameter of the second-stage rod 12, ensuring that the rod can pass smoothly through the side plate, while avoiding the side plate from shaking during assembly.
[0020] Both the screw head 14 and the nut head 22 adopt a hexagonal head structure. The height of the screw head 14 and the nut head 22 are consistent with the depth of the countersunk head 33, and can be fully embedded in the countersunk head 33 and are flush with the surface of the first side plate 31 and the second side plate 32.
[0021] A toothed groove is provided at the connection between the second-stage rod body 12 and the third-stage rod body 13. The toothed groove is used to remove chips during thread processing to prevent thread jamming, and at the same time forms a "stepped limiting surface".
[0022] A hollow cone 231 is provided on the section of the hollow cylinder 23 near the head 22 of the nut.
[0023] The diameter of the third-order rod 13 is larger than the diameter of the second-order rod 12, but smaller than the diameter of the first-order rod 11.
[0024] Assembly principle of this utility model: Pre-positioning: Insert the headed three-stage height limiting screw 1 into the countersunk position 33 of the first side plate 31, so that the screw head 14 is fully embedded in the large hole of the countersunk position 33, the second-stage rod 12 passes through the small hole of the countersunk position 33, and the third-stage rod 13 extends out of the inner side of the first side plate 31 towards the second side plate. Thread alignment: Align the second side plate 32 with the first side plate 31, so that the third rod 13 of the headed three-stage height limiting screw 1 is aligned with the small hole of the countersunk position 33 of the second side plate 32, and then put the headed cylindrical fixed length nut 2 into the third rod 13 from the countersunk position 33 side of the second side plate 32, so that the external thread of the third rod 13 and the internal thread of the nut are initially engaged. Tightening and Limiting: Use a wrench to fix the screw head 14 and nut head 22 respectively, and rotate to tighten to the preset force. As the tightening process proceeds, the headed three-stage height limiting screw 1 moves towards the nut. When the end face of the countersunk groove 15 at the connection between the second-stage rod 12 and the third-stage rod 13 is in contact with the inner side of the first side plate 31, and the nut head 22 is fully embedded in the countersunk position 33 of the second side plate 32 and in contact with the surface of the side plate, the two form a bidirectional mechanical limit, preventing the screw from being tightened further. At this time, the tightening force reaches the preset safety range. Surface flatness guarantee: After assembly, the screw head 14 and the nut head 22 are fully accommodated in the countersunk head 33 and remain flush with the outer surfaces of the first side plate 31 and the second side plate 32, without any protrusions or depressions.
[0025] After assembly, the screw head 12 of the three-stage height limiting screw 1 and the nut head 22 of the cylindrical fixed-length nut 2 are fully embedded in the countersunk head 33, flush with the surface of the cabinet side panel 3, without any protrusions or depressions. The overall surface of the cabinet is flat, and the aesthetics are significantly improved. At the same time, due to the limiting effect of the three-stage stepped structure and the fixed-length nut, the fastening force is controlled within the preset safety range. The single-layer stainless steel cabinet side panel 3 (hollow on the back) does not show any deformation, and the cabinet connection is stable.
[0026] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.
[0027] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A single-layer stainless steel cabinet locking structure, characterized in that, The system includes a headed three-stage height limiting screw (1), a headed cylindrical fixed-length nut (2), and a single-layer stainless steel cabinet side panel (3). The headed three-stage height limiting screw (1) includes a first-stage rod (11), a second-stage rod (12), a third-stage rod (13), and a screw head (14). The outer surface of the third-stage rod (13) is provided with an external thread. The headed cylindrical fixed-length nut (2) includes a fixed-length nut rod (21) and a nut head (22). The outer circumference of the fixed-length nut rod (21) is cylindrical, and the interior of the fixed-length nut rod (21) is located away from the nut head (22). There is a hollow cylinder (23), the height of the hollow cylinder (23) is less than the height of the cylinder, the inner surface of the hollow cylinder (23) is provided with an internal thread, the length of the internal thread is greater than the length of the external thread, the external thread matches the internal thread, the single-layer stainless steel cabinet side plate (3) includes a first side plate (31) and a second side plate (32), a countersunk head (33) is provided at the position where the locking screw needs to be installed on the first side plate (31) and the second side plate (32), the diameter of the screw head (14) and the nut head (22) are both adapted to the diameter of the countersunk head (33).
2. The single-layer stainless steel cabinet interlocking structure according to claim 1, characterized in that: Both the screw head (14) and the nut head (22) adopt a hexagonal head structure. The height of the screw head (14) and the nut head (22) are consistent with the depth of the countersunk head (33), and can be completely embedded in the countersunk head (33) and are flush with the surface of the first side plate (31) and the second side plate (32).
3. The single-layer stainless steel cabinet interlocking structure according to claim 1, characterized in that: A toothed groove (15) is provided at the connection between the second-stage rod body (12) and the third-stage rod body (13).
4. The single-layer stainless steel cabinet interlocking structure according to claim 1, characterized in that: The hollow cylinder (23) has a hollow cone (231) near the head (22) of the nut.
5. A single-layer stainless steel cabinet interlocking structure according to claim 1, characterized in that: The diameter of the third-order rod (13) is greater than the diameter of the second-order rod (12) and less than the diameter of the first-order rod (11).
6. The single-layer stainless steel cabinet interlocking structure according to claim 1, characterized in that: The countersunk head (33) adopts a stepped hole structure, with the large hole diameter matching the diameter of the screw head (14) and the nut head (22), and the small hole diameter matching the diameter of the second stepped rod body (12).