A fastener for a maintenance plate

Abstract

This utility model discloses a fastener for a service panel, including a fixed base, a swivelable block, and a hand-tightening bolt. The swivelable block is rotatably mounted on the fixed base, and the swivelable block and the fixed base are coaxially arranged. The fixed base is installed on the unit to be serviced using self-tapping screws. The swivelable block is rotated from a position parallel to the fixed base to above the service panel, and the fixed base and the swivelable block are installed on the upper part of the service panel using the hand-tightening bolt. The fastener for the service panel of this utility model uses screws to fix the fixed base to the air conditioning terminal unit panel, which does not limit the installation space / plate thickness of the air conditioning unit panel structure, nor does it limit the use of riveting on the panel, thus having a wide range of applications.

Description

Technical Field

[0001] This utility model belongs to the technical field of central air conditioning unit equipment, and in particular relates to a fastener for a maintenance plate. Background Technology

[0002] In an air conditioning system, the terminal unit is a crucial component, typically integrating numerous parts such as filters, cooling coils, humidifiers, and fan motors. Over long-term operation, these components require regular cleaning, maintenance, and replacement due to dust accumulation and wear.

[0003] Based on these usage requirements, most air conditioning terminal units must be equipped with access panels for easy disassembly and maintenance. However, setting up access panels and installing maintenance plates presents new challenges: on the one hand, it is necessary to ensure that the unit's performance parameters, such as cooling and heating capacity, air volume, and efficiency, are not affected by maintenance operations; on the other hand, the maintenance plate must be fixed with sufficient structural strength to ensure that it does not loosen or become damaged during unit operation and maintenance, while also having good sealing properties to prevent air leakage and maintain a stable operating environment inside the unit.

[0004] Currently, the market mostly uses a structure of "access door lock + access panel side baffle" or "butterfly bolt + pressure plate + rivet nut" to fix the air conditioner box access panel.

[0005] Let's first look at the "wing bolt + pressure plate + rivet nut" structure. It has certain advantages, such as maintaining good sealing and relatively low cost. However, its limitations are also quite obvious. It is only suitable for scenarios where the fixing surface and the fixed surface are on the same horizontal plane. Once the fixing surface and the fixed surface are not on the same horizontal plane, a series of problems will occur: the fastening bolts will be exposed, reducing the contact area and thus making the fixing effect unstable, while also affecting the overall aesthetics. Furthermore, this structure has specific requirements for the air conditioning unit panel structure and is only suitable for panel structures that can be riveted. When the installation space of the air conditioning unit panel structure is limited or the plate thickness does not meet the requirements, this structure cannot be used to fix the access panel.

[0006] Looking at the structure of the "access lock + access panel side baffle," it also has its own characteristics. Its advantage lies in the fact that it eliminates the need for riveting and can be used when the fixing surface and the surface being fixed are not on the same horizontal plane. However, it also has significant drawbacks. On one hand, the cost is higher, increasing the overall product cost; on the other hand, the installation process is more complicated, requiring more time and effort, thus affecting installation efficiency. Utility Model Content

[0007] In view of this, the present invention aims to provide a maintenance plate fixing structure that is low in cost, stable in structure, has good sealing performance, is easy to install, convenient for maintenance, and has strong applicability, so as to solve at least one technical problem in the background art.

[0008] To achieve the above objectives, the technical solution of this utility model is implemented as follows:

[0009] A fastener for an inspection plate includes a fixing base, a rotatable block, and a hand-tightening bolt;

[0010] The spun block is rotatably mounted on the fixed base, and the spun block and the fixed base are coaxially arranged.

[0011] Use self-tapping screws to install the fixing base on the unit to be repaired. Rotate the swivel block from the position parallel to the fixing base to the top of the repair plate. Use hand-tightening bolts to install the fixing base and swivel block on the upper part of the repair plate.

[0012] Furthermore, the fixed base includes a base plate and mounting columns, with the mounting columns mounted on the base plate.

[0013] Furthermore, the base plate has grooves on both sides, and the grooves of the base plate have first mounting holes.

[0014] Furthermore, the bottom of the base plate is provided with a nut that engages with the hand-tightening bolt.

[0015] Furthermore, the mounting post is provided with a first through hole that allows a hand-tightened bolt to pass through.

[0016] Furthermore, the swivelable block includes a rotating shaft and a pressing block, with the pressing block disposed on one side of the rotating shaft, and the rotating shaft being coaxially disposed with the fixed base.

[0017] Furthermore, the pressing block includes a top plate, reinforcing ribs, and side plates;

[0018] One side of the top plate is connected to the rotating shaft, and the side plate is set vertically on the other side of the top plate;

[0019] Several reinforcing ribs are set at the bottom of the top plate, with one side of the reinforcing ribs mounted on the rotating shaft and the other side connected to the side plate.

[0020] Furthermore, the upper part of the rotating shaft is provided with a second through hole that allows a hand-tightened bolt to pass through, and the lower part of the rotating shaft is nested with the fixed base.

[0021] Furthermore, the bottom of the hand-tightening bolt is provided with an external thread corresponding to the nut, and the top of the hand-tightening bolt is provided with a rotating head.

[0022] Furthermore, the fixing base is a one-piece molded structure of nylon;

[0023] The spinnable block is a one-piece molded structure of polypropylene.

[0024] Compared with the prior art, the fixing component for the inspection plate described in this utility model has the following advantages:

[0025] 1. Cost advantage: The fixing base and swivel block of the inspection plate fastener in this application are made of plastic, and only the rivet nut and the screw part of the hand-tightening bolt embedded in the fixing base are made of metal. Compared with the structure of "inspection door lock + inspection plate side baffle", the material cost is significantly reduced.

[0026] 2. Structural stability: In the maintenance plate fastener of this application, the swivelable block adopts an irregular shape design, with its top concentric with the cylinder of the fixing base. This increases the contact area between the swivelable block and the fixing base, thereby enhancing structural stability. Furthermore, compared to the previously used "wing bolt + pressure plate + rivet nut" structure with a hollowed-out bottom pressure plate, the swivelable block has added reinforcing ribs at the bottom, increasing the contact area with the maintenance plate and making the structure more stable.

[0027] 3. Excellent sealing performance: The fixing base of the maintenance plate fastener in this application is made of PA material. Compared with PP material, PA material has moderate rigidity, higher tensile strength, and superior toughness / impact resistance. This results in a better seal when the maintenance plate is fixed to the unit. Furthermore, the swivelable block of this novel maintenance plate fastener is irregularly shaped, with its top concentric with the cylinder of the fixing base, increasing the contact area between them for a more secure fixation and better sealing. Additionally, reinforcing ribs are added to the bottom of the swivelable block. Compared to the previous "wing bolt + pressure plate + rivet nut" structure with a hollowed-out bottom pressure plate, this increases the contact area with the maintenance plate, resulting in better sealing performance.

[0028] 4. Simple installation and convenient maintenance. The access panel fastener of this application can be directly installed on the air conditioning unit panel / frame using screws, eliminating the need for riveting on the panel or installing a door lock on the access door. This makes installation convenient and efficient. Furthermore, the novel access panel fastener features a swivel block that allows for smooth 360° rotation through the base's feet even when placed at the bottom. This design simplifies disassembly of the access panel; simply tighten the hand-tightening bolts twice to rotate the swivel block 90°, easily removing the access panel and achieving convenient maintenance.

[0029] 5. Strong Applicability. In the maintenance plate fastener of this application, the swivelable block can still smoothly pass through the bottom feet of the fixing base 360° even when placed at the very bottom. This unique 360° rotation design can adapt to the fixing needs of different planes and has strong tolerance for height differences. At the same time, the fixing base of the new maintenance plate fastener of this application is installed with screws to the air conditioning terminal unit box panel, which does not limit the installation space / plate thickness of the air conditioning box panel structure, nor does it limit the need to rivet the panel, thus having a wide range of applications. Attached Figure Description

[0030] The accompanying drawings, which form part of this utility model, are used to provide a further understanding of the utility model. The illustrative embodiments of the utility model and their descriptions are used to explain the utility model and do not constitute an undue limitation of the utility model. In the drawings:

[0031] Figure 1 This is a schematic diagram of a fastener for an inspection plate according to the present invention.

[0032] Figure 2 This is a schematic diagram of a fixing base for an inspection plate proposed in this utility model;

[0033] Figure 3 This is a bottom schematic diagram of a fixing base for an inspection plate proposed in this utility model;

[0034] Figure 4 This is a schematic diagram of a rotatable pressing block for a maintenance plate proposed in this utility model;

[0035] Figure 5 This is a top view schematic diagram of a swivelable block for a maintenance plate proposed in this utility model;

[0036] Figure 6 This is a bottom schematic diagram of a swivelable block for a maintenance plate proposed in this utility model.

[0037] Figure 7 This is a schematic diagram of a hand-tightening bolt for a maintenance plate according to the present invention.

[0038] Figure label:

[0039] 1. Fixed base; 11. Base plate; 12. Mounting column; 13. Groove; 14. First mounting hole; 15. Nut; 16. First through hole; 2. Rotatable block; 21. Rotating shaft; 211. Second through hole; 22. Pressing block; 221. Top plate; 222. Reinforcing rib; 223. Side plate; 3. Hand-tightening bolt; 31. External thread; 32. Rotating head. Detailed Implementation

[0040] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments of the present invention can be combined with each other.

[0041] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0042] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0043] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0044] A fastener for a maintenance plate includes a fixed base 1, a rotatable block 2, and a hand-tightening bolt 3. The rotatable block 2 is rotatably mounted on the fixed base 1, and the rotatable block 2 and the fixed base 1 are coaxially arranged. The fixed base 1 is installed on the unit to be maintained using self-tapping screws. The rotatable block 2 is rotated from a position parallel to the fixed base 1 to above the maintenance plate. The fixed base 1 and the rotatable block 2 are then installed on the upper part of the maintenance plate using the hand-tightening bolt 3.

[0045] The fixed base 1 includes a base plate 11 and a mounting post 12, with the mounting post 12 disposed on the base plate 11. The base plate 11 has grooves 13 on both sides, and a first mounting hole 14 is provided at each groove 13. The bottom of the base plate 11 has a nut 15 that mates with a hand-tightening bolt 3. The mounting post 12 has a first through hole 16 through which the hand-tightening bolt 3 can pass.

[0046] The swivelable block 2 includes a rotating shaft 21 and a pressing block 22. The pressing block 22 is disposed on one side of the rotating shaft 21, and the rotating shaft 21 is coaxially disposed with the fixed base 1. The pressing block 22 includes a top plate 221, reinforcing ribs 222, and a side plate 223. One side of the top plate 221 is connected to the rotating shaft 21, and the side plate 223 is vertically disposed on the other side of the top plate 221. Several reinforcing ribs 222 are disposed at the bottom of the top plate, and one side of the reinforcing ribs 222 is disposed on the rotating shaft 21, and the other side is connected to the side plate 223.

[0047] The upper part of the rotating shaft 21 is provided with a second through hole 211 through which the hand-tightening bolt 3 can pass, and the lower part of the rotating shaft 21 is nested with the fixed base 1. The bottom of the hand-tightening bolt 3 is provided with an external thread 31 corresponding to the nut 15, and the top of the hand-tightening bolt 3 is provided with a rotating head 32. The fixed base 1 is a one-piece molded structure of nylon, and the spinnable block 2 is a one-piece molded structure of polypropylene.

[0048] The mounting base 1 adopts a cylindrical spatial design with an injection-molded nut 15 inside and mounting holes at the bottom. In particular, the first mounting hole 14 on the base is recessed to ensure that the screw head is completely recessed into the base and not exposed.

[0049] The swivelable block 2 adopts an irregular shape, and its top is concentric with the cylindrical space of the fixed base 1. This design ensures that even when the swivelable block 2 is at the bottom, it can pass smoothly through the bottom foot of the fixed base 1.

[0050] In terms of material selection, the fixed base 1 is made of PA (nylon) material and the swivelable block 2 is made of PP (polypropylene) material. This combination of materials can ensure structural strength and effectively prevent cold bridge effect. Detailed implementation method:

[0052] Step 1: Prepare all the necessary components for a mounting bracket for the inspection panel. The mounting base 1 needs to be fixed to the air conditioning unit panel or frame using self-tapping screws; the mounting base 1 has a groove 13 that allows the self-tapping screw to sink into the groove 13, allowing the pressure block to rotate freely;

[0053] Step 2: Assemble the inspection plate fasteners. Place the swivel block 2 and hand-tightening bolts 3 according to... Figure 1 Fixed on the fixed base 1, the hand-tightened bolt 3 is passed through the first through hole 16 and the second through hole 211. At this time, the swivel block 2 is set parallel to the fixed base 1.

[0054] Step 3: Secure and lock the inspection plate. Rotate the rotatable block 2 clockwise 90° to the top of the inspection plate, so that it presses against the inspection plate. Tighten the hand-tightened bolt 3 to connect with the nut 15 and secure and lock the inspection plate.

[0055] After the maintenance is completed, turn the hand-tightening bolt 3 and then turn the rotatable pressure block 2 so that the rotatable pressure block 2 is parallel to the fixed base 1. At this time, remove the inspection plate.

[0056] 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, improvements, etc., 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 fixture for an access panel, characterized by: Includes a fixed base, a swivel block, and hand-tightening bolts; The spun block is rotatably mounted on the fixed base, and the spun block and the fixed base are coaxially arranged. Use self-tapping screws to install the fixing base on the unit to be repaired. Rotate the swivel block from the position parallel to the fixing base to the top of the repair plate. Use hand-tightening bolts to install the fixing base and swivel block on the upper part of the repair plate.

2. A panel securing member according to claim 1, wherein: The fixed base includes a base plate and mounting columns, with the mounting columns set on the base plate.

3. A panel securing member according to claim 2, wherein: The base plate has grooves on both sides, and the grooves on the base plate have first mounting holes.

4. The access panel fastener of claim 2, wherein: The bottom of the base plate is equipped with a nut that mates with a hand-tightening bolt.

5. The access panel fastener of claim 2, wherein: The mounting post has a first through hole that allows a hand-tightened bolt to pass through.

6. The access panel fastener of claim 2, wherein: The swivelable block includes a rotating shaft and a pressing block. The pressing block is located on one side of the rotating shaft, and the rotating shaft is coaxial with the fixed base.

7. A fastener for an inspection plate according to claim 2, characterized in that: The pressing block includes a top plate, reinforcing ribs, and side plates; One side of the top plate is connected to the rotating shaft, and the side plate is set vertically on the other side of the top plate; Several reinforcing ribs are set at the bottom of the top plate, with one side of the reinforcing ribs mounted on the rotating shaft and the other side connected to the side plate.

8. A fastener for a maintenance plate according to claim 1, characterized in that: The upper part of the rotating shaft is provided with a second through hole that allows a hand-tightened bolt to pass through, and the lower part of the rotating shaft is nested with the fixed base.

9. A fastener for an inspection plate according to claim 4, characterized in that: The bottom of the hand-tightening bolt has an external thread corresponding to the nut, and the top of the hand-tightening bolt has a rotating head.

10. A fastener for an inspection plate according to claim 4, characterized in that: The fixing base is a one-piece molded structure of nylon; The spinnable block is a one-piece molded structure of polypropylene.

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