Rotating shaft structure of upper cover and lower cover

Abstract

The utility model relates to the technical field of mechanical rotating shaft structures, and discloses an upper and lower cover rotating shaft structure in order to solve the problem of complex installation in the prior art. Comprising an upper cover, a lower cover and a rotating shaft fixing cover, two cylindrical bolts are arranged at one end of the upper cover and symmetrically arranged on the two sides of the end of the upper cover, one end of the lower cover and the rotating shaft fixing cover are each of a semi-cylinder structure, and bolt grooves are formed in the two ends of the lower cover and used for containing the bolts of the upper cover and achieving the rotating shaft function. Bolt grooves are formed in the end portions of the inner sides of the plug pin grooves of the lower cover and the rotating shaft fixing cover, and fixing bolts penetrate through the bolt grooves and fixedly connect the lower cover, the upper cover and the rotating shaft fixing cover. The bolt is arranged on the upper cover, the bolt and the upper cover are integrally designed, the bolt groove is divided into two parts, during fastening, the rotating shaft structure can be fixed only by covering the rotating shaft fixing cover and screwing the fixing bolt, and the defects that a traditional rotating shaft structure is complex in installation and disassembly and low in production efficiency are overcome.

Description

Technical Field

[0001] This utility model relates to the field of mechanical shaft structure technology, and in particular to a top and bottom cover shaft structure. Background Technology

[0002] Modern lighting fixtures, distribution boxes, and other similar products often use a top and bottom cover structure, requiring a hinge for opening and closing. Early hinge structures mostly used metal hinges, but hinges required welding or bolting, which was troublesome to install, prone to rust, and expensive.

[0003] Later, a split hinge design emerged, such as setting fixing holes at both ends of the upper and lower covers (e.g. Figure 5 As shown in the image, long metal bolts are screwed into the upper and lower covers to secure them, allowing for opening and closing. However, this structure requires long metal bolts, necessitating a large number of thread turns during assembly. This requires significant manual torque, which can easily lead to uneven bolt tightening on the left and right sides, causing misalignment, lateral deviation, affecting the product's appearance, and potentially causing bolt jamming, large gaps, or even breakage. Furthermore, the large number of thread turns results in low production and assembly efficiency, making subsequent maintenance and disassembly extremely cumbersome.

[0004] Therefore, there is an urgent need for an integrated pin slot and bolt fixing design, which can simplify the installation steps of the shaft structure, save labor costs, improve reliability, and enhance the overall aesthetics of the product. Utility Model Content

[0005] The purpose of this utility model is to provide a top and bottom cover pivot structure to solve the problem of complex installation in the prior art.

[0006] To achieve the above objectives, the specific technical solution of the upper and lower cover pivot structure of this utility model is as follows:

[0007] A hinge structure with upper and lower covers includes an upper cover, a lower cover, and a hinge fixing cover. One end of the upper cover is provided with two cylindrical pins, which are symmetrically arranged on both sides of the end of the upper cover. One end of the lower cover and the hinge fixing cover are both semi-cylindrical structures, and pin slots are respectively opened at both ends. The pin slots are used to accommodate the pins of the upper cover and form a hinge function. The inner ends of the pin slots of the lower cover and the hinge fixing cover are provided with bolt slots. Fixing bolts pass through the bolt slots and fix the lower cover, the upper cover, and the hinge fixing cover.

[0008] Furthermore, the diameter of the pin is clearance-fitted with the inner diameter of the pin groove, with a clearance range of 0.1-0.3 mm.

[0009] Furthermore, the opening of the pin slot is provided with a guide groove larger than the diameter of the pin slot, and a fixing post is provided between the upper cover and the pin corresponding to the guide groove.

[0010] Furthermore, the inner side of the bolt groove of the rotating shaft fixing cover is provided with a positioning protrusion, and a cavity is formed between the two positioning protrusions; the lower cover is provided with a recessed part corresponding to the cavity, and the positioning protrusion is embedded in the recessed part to achieve positioning.

[0011] Furthermore, the pivot fixing cover includes a horizontal extension and an arc-shaped cover portion. The horizontal extension portion is used to form an assembly gap with the lower cover body, and the arc-shaped cover portion covers the outer peripheral surface of the pin groove.

[0012] The upper and lower cover pivot structure provided by this utility model has the following advantages:

[0013] 1. Improved installation efficiency: The mating structure of the pin and guide groove makes assembly simpler, and workers can complete the assembly without precise alignment.

[0014] 2. Vibration-resistant loosening: The interference fit between the positioning convex plate and the recessed part can effectively resist bolt loosening caused by vibration.

[0015] 3. Cost reduction: The integrated pin structure reduces the number of parts, and the installation of the shaft module can be completed by bolt fastening, saving material costs. Attached Figure Description

[0016] Figure 1 The overall structure provided by this utility model is explosive Figure 1 ;

[0017] Figure 2 This utility model provides a schematic diagram of the overall structure of the upper and lower covers;

[0018] Figure 3 The overall structure provided by this utility model is explosive Figure 2 ;

[0019] Figure 4 The diagram shows the opening of the upper and lower covers provided by this utility model;

[0020] Figure 5 This is a schematic diagram of a traditional split-type pin-shaft structure.

[0021] In the diagram: 1. Top cover; 11. Cylindrical pin; 12. Fixing post; 2. Bottom cover; 21. Pin groove; 22. Guide groove; 3. Shaft fixing cover; 31. Arc-shaped cover; 32. Horizontal extension; 4. Bolt groove; 5. Fixing bolt; 6. Positioning protrusion; 7. Recess. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages 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 for explaining this utility model and are not intended to limit this utility model.

[0023] See Figure 1-5 This utility model provides a top and bottom cover pivot structure, suitable for pivot structures between the top and bottom covers of equipment such as lamps and chassis. Rotation is achieved through the cooperation of pins and pin slots. Two cylindrical pins 11 are symmetrically arranged on both sides of the end of the top cover 1. The pins are integrally formed with the top cover 1 or fixed by welding / bolts. The bottom cover 2 and the pivot fixing cover 3 are both semi-cylindrical structures with pin slots 21 at both ends. The inner diameter of the pin slot 21 is 0.1-0.3mm larger than the pin diameter, and a bolt groove 4 is provided at the inner end. The pivot fixing cover 3 is locked by passing through the bolt groove 4, and the pin is fixed in the locked bolt groove 4, allowing rotation between the pin and the pin slot 21.

[0024] Preferably, a guide groove 22 with a diameter larger than that of the pin groove 21 is provided at the opening of the pin groove 21. In one embodiment, the guide groove 22 is conical, and a fixing post 12 is provided at the corresponding position of the upper cover 1 to prevent misalignment of the pin assembly. At the same time, two symmetrical positioning protrusions 6 are provided on the inner side of the bolt groove 4 of the rotating shaft fixing cover 3. The height of the positioning protrusions 6 is greater than the height of the pin groove 21, forming an interference fit with the recessed part 7 of the lower cover 2 to ensure axial alignment during assembly.

[0025] During installation, first place the lamp post horizontally on the lamp post bracket, then align the cylindrical pin 11 of the upper cover 1 with the pin groove 21 of the lower cover 2, and push it along the guide groove 22 until the fixing post 12 is inserted into the bottom of the groove; cover the rotating shaft fixing cover 3, so that the positioning protrusion 6 is embedded in the recessed part 7 of the lower cover 2. After the positioning protrusion 6 is embedded, the bolt groove 4 of the rotating shaft fixing cover 3 and the lower cover 2 is also fixed. Insert the fixing bolt 5 and tighten the bolt to complete the rotating shaft fixing of the upper cover 1 and the lower cover 2.

[0026] Hold the top cover 1 with one hand and rotate it clockwise. At this time, the cylindrical pin 11 rotates in the pin slot 21. Use the pin as the axis to lift the top cover 1 for lamp maintenance.

[0027] In summary, this application upgrades the existing pin structure by integrating the pin into the upper cover 1, effectively dividing the pin slot 21 in two. During fastening, only the rotating shaft fixing cover 3 needs to be placed on top, and the fixing bolts 5 need to be tightened to secure the rotating shaft structure. This solves the problems of complex installation and cumbersome disassembly associated with traditional rotating shaft structures. Simultaneously, the design of the guide groove 22, along with the interference fit between the fixing post 12, the positioning protrusion 6, and the recess 7, ensures assembly accuracy, allowing for quick installation of the pin without precise alignment, reducing labor costs. Compared to existing technologies, this solution effectively reduces the number of parts, lowers manual positioning costs, and improves assembly efficiency. Furthermore, the integrated structure avoids the risks of welding or rusting. It is particularly suitable for high-altitude equipment such as streetlights and distribution boxes, balancing safety, economy, and ease of maintenance.

[0028] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A hinge structure for upper and lower covers, characterized in that, The device includes an upper cover (1), a lower cover (2), and a pivot fixing cover (3). One end of the upper cover (1) is provided with two cylindrical pins (11). The pins are symmetrically arranged on both sides of the end of the upper cover (1). One end of the lower cover (2) and the pivot fixing cover (3) are both semi-cylindrical structures, and pin slots (21) are respectively opened at both ends. The pin slots (21) are used to accommodate the pins of the upper cover (1) and form a pivot function. The inner end of the pin slots (21) of the lower cover (2) and the pivot fixing cover (3) are provided with bolt slots (4). The fixing bolts (5) pass through the bolt slots (4) and fix the lower cover (2), the upper cover (1), and the pivot fixing cover (3) in a fixed connection.

2. The upper and lower cover pivot structure according to claim 1, characterized in that, The diameter of the pin is clearance-fitted with the inner diameter of the pin groove (21), with a clearance range of 0.1-0.3 mm.

3. The upper and lower cover pivot structure according to claim 1, characterized in that, The opening of the pin groove (21) is provided with a guide groove (22) larger than the diameter of the pin groove (21), and a fixing post (12) is provided between the upper cover (1) and the pin corresponding to the guide groove (22).

4. The upper and lower cover pivot structure according to claim 1, characterized in that, The inner side of the bolt groove (4) of the rotating shaft fixing cover (3) is provided with a positioning protrusion (6), and a cavity is formed between the two positioning protrusions (6); the lower cover (2) is provided with a recess (7) corresponding to the cavity, and the positioning protrusion (6) is embedded in the recess (7) to achieve positioning.

5. The upper and lower cover pivot structure according to claim 1, characterized in that, The rotating shaft fixing cover (3) includes a horizontal extension (32) and an arc-shaped cover (31). The horizontal extension (32) is used to form an assembly gap with the main body of the lower cover (2). The arc-shaped cover (31) covers the outer peripheral surface of the pin groove (21).

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