A detachable electric energy metering box

Abstract

The utility model discloses a detachable electric energy metering box, including the box, is provided with the connecting port on the box. The box is corresponded to the side of wall surface and is provided with the support arm, and the support arm can pass through the connecting port to provide the support for the box, and the opening is set up on the support arm. The support arm outside is equipped with the limiting piece, and the limiting piece has the limiting shoulder of abutting the inner wall of the box to limit the transverse displacement of the box relative to the support arm. The thimble is set up on the limiting piece, and the ball locking structure is set up in the support arm, and the thimble can be inserted and cooperate with the ball locking structure to form the locking connection, and the unlocking hole is equipped on the ball locking structure, and the unlocking hole is set up in alignment with the opening, so that the opener can be inserted into the unlocking hole through the opening and trigger the ball locking structure to cancel the locking connection. The structure realizes quick dismounting, improves the transverse limiting and locking reliability, and reduces the risk of mistaken dismounting and theft.

Description

Technical Field

[0001] This utility model relates to the field of electrical energy metering device installation technology, and in particular to a detachable electrical energy metering box. Background Technology

[0002] Electricity metering boxes are usually fixed to the wall with fasteners. The initial installation requires positioning, drilling and tightening, which involves many construction steps and is inconvenient to adjust. If replacement or repair is needed later, the original fasteners often need to be removed or new holes need to be drilled, which can easily cause secondary damage to the wall, affect the appearance and structural integrity, and reduce maintenance efficiency.

[0003] To reduce the inconvenience of repeated drilling, existing technologies often employ a mounting structure between the wall and the electricity metering box. For example, CN202423037677.0 discloses an easy-to-install and disassemble electricity metering box. It features a horizontal support rod on the wall side forming a hanging groove, and a hook mechanism on the rear side of the box. During installation, the hook is inserted into the hanging groove, and a screw extends below the horizontal support rod to prevent upward movement, thus facilitating easy installation. During disassembly, simply screwing the screw back releases the obstruction and allows the box to be removed.

[0004] While the aforementioned convenient assembly and disassembly scheme can reduce repeated drilling, the mounting and blocking mechanisms may shift laterally under external force, causing the enclosure to easily move laterally and gradually detach from the mounting position, posing a risk of falling. In addition, the assembly and disassembly of the enclosure rely on externally operable screws and knobs, which may allow unauthorized personnel to disassemble it without damaging its appearance, leading to the risk of accidental disassembly or theft. Utility Model Content

[0005] The technical problem this utility model aims to solve is: how to improve the lateral limiting capacity between the box and the wall-mounted load-bearing components while enabling rapid installation, maintenance and replacement of the electricity metering box, and reduce the risk of accidental dismantling and theft through locking connections with special unlocking methods, thereby reducing safety hazards.

[0006] To achieve the above objectives, this utility model provides a detachable electricity metering box, including a box body with a connection port. The box body is characterized by: a support arm on the wall side corresponding to the box body, the support arm passing through the connection port to provide support for the box body; an opening on the support arm; a limiting member sleeved on the outer side of the support arm, the limiting member having a limiting shoulder abutting against the inner wall of the box body to limit the lateral displacement of the box body relative to the support arm; a pin on the limiting member; a ball locking structure inside the support arm, the pin being able to be inserted and cooperate with the ball locking structure to form a locking connection; an unlocking hole on the ball locking structure, the unlocking hole being aligned with the opening, so that a unlocking device can be inserted through the opening into the unlocking hole and trigger the ball locking structure to release the locking connection.

[0007] Furthermore, the support arm is fixedly connected to the mounting bracket, which has mounting holes for fasteners to fix the mounting bracket to the wall.

[0008] Furthermore, the limiting component includes a sleeve, which is fitted onto the outside of the support arm, and a limiting shoulder is located at the end of the sleeve and abuts against the inner wall of the box.

[0009] Furthermore, a shallow groove is provided on the ejector pin, which is used to engage with the balls in the ball locking structure to restrict the axial withdrawal of the ejector pin.

[0010] Furthermore, the ball locking structure is located inside the support arm, and a receiving cavity for accommodating the ball locking structure is formed inside the support arm. A cylinder is installed inside the receiving cavity, and the side wall of the cylinder forms a receiving position for the ball to move radially. The cylinder is fixedly connected to the pressure plate, and the pressure plate applies a restoring force to the cylinder under the action of a spring to keep the ball locked.

[0011] Furthermore, the ball locking structure includes a tapered sleeve, the narrow end of which is fixedly connected to the inner wall of the support arm, and the other end abuts against the pressure plate. The tapered sleeve is fitted on the outside of the cylinder and forms a radial constraint on the ball, so that the ball can engage with the shallow groove of the ejector pin to achieve locking.

[0012] Furthermore, a guide port is provided on the support arm to guide the insertion of the ejector pin.

[0013] This utility model uses a limiting shoulder to abut against the inner wall of the box to form a lateral limit, and with the support arm passing through for support, it can suppress the risk of lateral loosening and detachment of the box; a self-locking connection is formed by the pin and ball locking structure, and the unlocking hole is aligned with the opening to cooperate with the unlocking device to trigger unlocking from the inside of the box, which can reduce the risk of external accidental triggering and theft; when the mounting bracket can be retained for a long time, the replacement and maintenance of the box can reduce repeated drilling and improve maintenance efficiency, thus taking into account both the convenience of disassembly and assembly and the installation safety. Attached Figure Description

[0014] Figure 1 This is a front view of the overall structure of a detachable electricity metering box.

[0015] Figure 2 This is a schematic diagram of the back of a detachable electricity metering box.

[0016] Figure 3 This is an exploded schematic diagram of the support arm and limiting component in a detachable energy metering box.

[0017] Figure 4 This is a cross-sectional schematic diagram of the support arm in a detachable energy metering box.

[0018] Attached icon numbers:

[0019] 1. Housing; 2. Mounting bracket; 21. Mounting hole; 3. Support arm; 31. Opening; 32. Mounting groove; 4. Limiting component; 41. Sleeve; 42. Limiting shoulder; 43. Ejector pin; 431. Shallow groove; 5. Ball locking structure; 51. Cylinder; 52. Ball; 53. Pressure plate; 531. Connecting arm; 532. Unlocking hole; 54. Spring; 55. Conical sleeve; 56. Guide port; 6. Unlocker. Detailed Implementation

[0020] The technical solutions of this application will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of this application.

[0021] like Figures 1 to 4 As shown, this embodiment provides a detachable energy metering box, including a box body 1. The box body 1 is used to accommodate energy metering elements and their wiring components and forms a protective space. A connection port is provided on the box body 1, which is used to form a detachable through-fit with the wall-side load-bearing component. A support arm 3 is provided on the wall side of the box body 1. The support arm 3 can pass through the connection port to provide support for the box body 1, so that the support arm 3 bears the main load-bearing and positioning functions of the box body 1 in the installed state. In order to facilitate the long-term retention of the wall-side component and reduce repeated drilling of the wall during subsequent replacement and maintenance, in this embodiment, the support arm 3 is fixedly connected to the mounting frame 2. The mounting frame 2 is provided with mounting holes 21, which are used to fix the mounting frame 2 to the wall with fasteners. Mounting bracket 2 can be reliably connected to the wall during initial installation using fasteners such as expansion bolts, and can be retained for a long time after installation. When the box 1 is replaced or repaired, it can be quickly disassembled and assembled by the through-support cooperation with the support arm 3 and the locking cooperation between the limiting part 4 and the ball locking structure 5, thereby avoiding secondary damage to the wall caused by repositioning and drilling every time it is replaced.

[0022] Combination Figure 2As shown, several support arms 3 can be configured, preferably arranged in the four corner areas of the box 1 against the wall, to improve load-bearing stability and anti-sway capability. A mounting groove 32 can be provided between the support arm 3 and the mounting bracket 2. The mounting groove 32 cooperates with the corresponding positioning part of the mounting bracket 2 and is locked with fasteners, making the installation position of the support arm 3 adjustable. This adjustability is used to correct the parallelism of the extension direction and the dimensional deviation of the extension length of the support arm 3 during initial installation or adaptation to different box specifications, ensuring that each support arm 3 can be evenly stressed and smoothly cooperate with the connection port after the box 1 is in place, while also providing an assembly basis for the subsequent fitting of the limiting shoulder 42 to the inner wall of the box. The connection port is located at a corresponding position on the wall side of the box 1, and the shape of the connection port is adapted to the shape of the support arm 3, allowing the support arm 3 to pass through the connection port into the box 1 in a predetermined direction. The edge of the connection port can be rounded or chamfered, or a wear-resistant bushing can be provided to reduce scratches during insertion and improve durability after multiple disassemblies and reassemblies. The installation direction of the housing 1 can be either a push-in direction along the normal direction of the wall or a move-in direction along the horizontal direction. The specific direction can be determined according to the relative layout of the support arm 3 and the connection port. However, it should be ensured that the support arm 3 can be located in the bearing position inside the housing after the housing 1 is in place, so as to create space conditions for the subsequent assembly and locking of the limiting component 4.

[0023] To limit the lateral displacement of the housing 1 relative to the support arm 3 and suppress the risk of loosening under vibration, this embodiment includes a limiting member 4 fitted onto the outside of the support arm 3. The limiting member 4 has a limiting shoulder 42 that abuts against the inner wall of the housing 1 to limit the lateral displacement of the housing 1 relative to the support arm 3. Combined with... Figure 1 and Figure 3 As shown, the limiting component 4 includes a sleeve 41, which is fitted onto the outside of the support arm 3. A limiting shoulder 42 is located at the end of the sleeve 41 and abuts against the inner wall of the housing 1. The limiting shoulder 42 preferably forms an outwardly turned step structure or a flange structure, allowing it to make surface contact with the inner wall of the housing 1. This provides stable lateral limiting under conditions such as external impact, pulling, or transportation vibration, preventing the housing 1 from shifting laterally on the support arm 3 and gradually deviating from its installation position. To reduce local stress and coating wear at the contact point between the limiting shoulder 42 and the inner wall of the housing 1, the contact edge of the limiting shoulder 42 can be rounded. The contact surface between the limiting shoulder 42 and the housing can also be set as a plane or a partially fitted surface according to the shape of the inner wall of the housing, thereby improving contact stability.

[0024] Furthermore, the adjustable stroke provided by the mounting groove 32 at the connection between the mounting bracket 2 and the support arm 3 allows for adjustment of the extension position of the support arm 3 relative to the mounting bracket 2 during initial installation, based on the actual assembly state of the housing 1. This ensures that after the housing 1 is pushed or moved into place, the limiting shoulder 42 can naturally abut against the inner wall of the housing 1 when the limiting component 4 is assembled. When a small gap still exists between the limiting shoulder 42 and the inner wall of the housing due to housing manufacturing tolerances, wall flatness errors, mounting bracket 2 installation deviations, or support arm 3 assembly deviations, a shim can be placed between the limiting shoulder 42 and the inner wall of the housing 1 for compensation. The shim can be an adjusting shim or an elastic shim. The adjusting shim is used to precisely compensate for the fixed gap, ensuring a tight fit between the limiting shoulder 42 and the inner wall of the housing; the elastic shim is used to provide continuous preload and absorb vibration, thereby reducing micro-movement, loosening, and abnormal noise. The gasket material can be weather-resistant and corrosion-resistant rubber, silicone, polyurethane, or engineering plastics. Alternatively, a combination of thin metal adjusting plates and elastic gaskets can be used to balance compensation accuracy and vibration damping. The gaskets can be fixed to the limiting shoulder 42 or the corresponding area on the inner wall of the housing by pasting, clipping, or embedding. If necessary, a replaceable gasket structure can be provided to facilitate maintenance and replacement based on wear or gap changes after long-term use, thereby maintaining the fit of the limiting shoulder 42 and preventing loosening.

[0025] To prevent the limiting component 4 from being easily detached when not unlocked and to further stabilize its position, a locking connection is provided between the limiting component 4 and the support arm 3. Combined with... Figure 3 As shown, a pin 43 is provided on the limiting member 4, and a ball locking structure 5 is provided inside the support arm 3. The pin 43 can be inserted into and cooperate with the ball locking structure 5 to form a locking connection. The pin 43 can be fixed to the inner wall of the sleeve 41 or integrally formed with the sleeve 41, and the pin 43 extends in the direction toward the support arm 3. A shallow groove 431 is provided on the pin 43. The shallow groove 431 is used to engage with the ball 52 in the ball locking structure 5 to restrict the axial withdrawal of the pin 43, so that the limiting member 4 is not easily pulled out along the direction of the support arm 3 in the locked state. The shallow groove 431 can be set as an annular shallow groove or a partial groove. The groove depth matches the amount of ball 52 entering, so as to ensure reliable anti-retraction while avoiding weakening the strength of the pin 43. The end of the pin 43 can be provided with a guide rounded corner or a conical surface so as to form rolling contact with the ball 52 during insertion and reduce assembly resistance, while reducing scratches caused by repeated disassembly and assembly.

[0026] Combination Figure 4As shown, the ball locking structure 5 is disposed inside the support arm 3, and a receiving cavity is formed inside the support arm 3 to accommodate the ball locking structure 5. A cylinder 51 is disposed inside the receiving cavity, and the side wall of the cylinder 51 forms a receiving position for the radial movement of the ball 52. The ball 52 is disposed at the receiving position and can move slightly in the radial direction. The cylinder 51 is fixedly connected to the pressure plate 53. The pressure plate 53 applies a restoring force to the cylinder 51 under the action of the spring 54, so that the ball 52 is kept in a locked state that can enter the shallow groove 431. The spring 54 can be disposed inside the receiving cavity and abut against the pressure plate 53, so that the pressure plate 53 is in the reset position when there is no external force, thereby maintaining the locking preparation state or the locking holding state of the ball 52 through structural cooperation. A connecting arm 531 is provided on the pressure plate 53, and an unlocking hole 532 is opened on the connecting arm 531. The unlocking hole 532 is used to cooperate with the unlocking device 6 to transmit the unlocking operation force. An opening 31 is provided on the support arm 3, which is aligned with the unlocking hole 532, allowing the unlocking device 6 to be inserted into the unlocking hole 532 through the opening 31 and apply force to the pressure plate 53, thereby triggering the unlocking process of the ball locking structure 5. To reduce the probability of misoperation, the unlocking hole 532 can be designed with a specific cross-sectional shape to match the unlocking device 6, making it difficult for common general-purpose tools to be effectively inserted and apply unlocking force; at the same time, the opening 31 is preferably located in an accessible position inside the housing 1, so that the unlocking operation needs to be performed from the inside after the housing 1 door is opened, reducing the possibility of direct external access and disassembly from the structural position relationship.

[0027] The ball locking structure 5 also includes a tapered sleeve 55. The tapered sleeve 55 is fitted onto the outside of the cylinder 51 and forms a radial constraint on the ball 52, so that the ball 52 is constrained inward in the locked state and can engage with the shallow groove 431 of the ejector pin 43 to prevent it from retracting. It should be emphasized that the narrow end of the tapered sleeve 55 is fixedly connected to the inner wall of the support arm 3, the fixed end of the tapered sleeve 55 is located in the area near the outer end of the support arm 3, and the other end of the tapered sleeve 55 abuts against or forms a force-bearing relationship with the pressure plate 53, so that the pressure plate 53 can maintain the constraint relationship between the tapered sleeve 55 and the ball 52 when the spring 54 returns to its original position. A guide port 56 is provided on the support arm 3. The guide port 56 is used to guide the insertion of the ejector pin 43. The guide port 56 is spatially connected to or aligned with the inner cavity of the tapered sleeve 55, so that the ejector pin 43 first enters the interior of the support arm 3 through the guide port 56 on the support arm 3 during assembly and further enters the locking area where the ball 52 is located. The guide opening 56 can be set at or near the end of the support arm 3, and can form a flared opening, chamfer, or rounded transition to improve the fault tolerance when the ejector pin 43 enters and reduce jamming; the guide opening 56 can also be equipped with a guide bushing to maintain a good guiding effect after multiple disassembly and assembly.

[0028] Based on the above structure, the assembly and locking process of this embodiment can be implemented as follows. During initial installation, the mounting bracket 2 is first placed against the wall and fixed to the wall using fasteners through the mounting holes 21, making the mounting bracket 2 the load-bearing foundation on the wall side. Then, several support arms 3 are fixedly connected to the mounting bracket 2, and the position of the support arms 3 can be adjusted using the mounting grooves 32, making each support arm 3 parallel to each other and corresponding to the connection port position of the housing 1. During housing 1 installation, the connection port on the wall side of the housing 1 is aligned with the support arm 3, and the housing 1 is pushed or moved in a predetermined direction, allowing the support arm 3 to pass through the connection port and enter the housing 1, providing load-bearing support. After the housing 1 is in place, the support arm 3 forms an exposed section inside the housing for the assembly of the limiting member 4. Subsequently, the limiting member 4 is assembled from the inside of the housing 1, so that the sleeve 41 is fitted onto the outside of the support arm 3, and the limiting shoulder 42 moves towards the inner wall of the housing 1 until it abuts. If there is a gap between the limiting shoulder 42 and the inner wall of the housing 1, an adjusting shim or elastic shim shall be added between the limiting shoulder 42 and the inner wall so that the limiting shoulder 42 forms a reliable fit and has pre-tightening force after assembly, thereby suppressing lateral loosening and wear in subsequent vibration environment.

[0029] After the limiting member 4 is in place, the ejector pin 43 is aligned with the guide port 56 on the support arm 3 and pushed inward. After entering the guide port 56, the ejector pin 43 continues to enter the ball locking structure 5 area inside the support arm 3. The outer wall of the ejector pin 43 contacts the ball 52 and pushes the ball 52 to produce radial displacement. As the ejector pin 43 is further inserted, when the shallow groove 431 moves to the position corresponding to the ball 52, under the combined action of the radial constraint of the tapered sleeve 55 on the ball 52 and the reset action of the spring 54 on the pressure plate 53, the ball 52 enters the shallow groove 431 inward and forms a lock. The ejector pin 43 is restricted in the axial direction and is not easily pulled out. Since the ejector pin 43 is fixed on the limiting member 4, the engagement of the ejector pin 43 and the ball bearing 52 makes the limiting member 4 and the support arm 3 form a locking connection; at the same time, the limiting shoulder 42 abuts against the inner wall of the box 1 and provides lateral limiting, which, together with the support arm 3, provides through support for the box 1, making the box 1 more stable in terms of load bearing, anti-swaying and anti-lateral displacement, reducing the risk of loosening, displacement or detachment caused by collision, pulling or vibration.

[0030] When it is necessary to disassemble housing 1 for replacement or repair, first open the door of housing 1 so that the opening 31 of support arm 3 is accessible inside the housing. Then, insert the unlocking device 6 through the opening 31 from the inside of housing 1 and into the unlocking hole 532. The unlocking device 6 applies force to the pressure plate 53, causing the pressure plate 53 to overcome the elastic force of the spring 54 and displace. This causes a change in the relative force between the cylinder 51 and the conical sleeve 55, thereby allowing the ball bearing 52 to move outward and exit the shallow groove 431, releasing the axial stop on the ejector pin 43. After the ball bearing 52 exits the shallow groove 431, the ejector pin 43 can be pulled out axially, and the limiting member 4 can be removed from the outside of support arm 3. After the limiting member 4 is removed, housing 1 is released from lateral limiting and locking constraints, and the operator can move housing 1 out of support arm 3 in a predetermined direction to achieve quick disassembly. After unlocking is completed, the unlocking device 6 is removed, and the spring 54 pushes the pressure plate 53 to reset, so that the ball 52 returns to the locking preparation state under the constraint of the conical sleeve 55, so that the pin 43 can be inserted automatically to form a lock when reassembly.

[0031] The embodiments of this utility model have been described above with reference to the accompanying drawings. Those skilled in the art should understand that, without departing from the concept of this utility model, the number and arrangement of the support arms 3, the shape of the connection port, the specific structure of the sleeve 41 and the limiting shoulder 42 of the limiting member 4, and the dimensional parameters of the ball locking structure 5 can all be replaced or changed. At the same time, the gap between the limiting shoulder 42 and the inner wall of the box 1 introduced by assembly tolerance can be eliminated and pre-tightened by adjusting shims or elastic shims. However, as long as the support arms 3 pass through the connection port to provide support for the box 1, the limiting shoulder 42 abuts against the inner wall of the box 1 to limit lateral displacement, the pin 43 and the ball locking structure 5 form a locking connection, and the unlocking hole 532 and the opening 31 are aligned to cooperate with the unlocking device 6 to trigger unlocking from the inside of the box 1, all of these should be considered as technical feature combinations of this application.

[0032] 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 detachable electricity metering box, comprising a box body (1), wherein a connection port is provided on the box body (1), characterized in that: The box (1) is provided with a support arm (3) on the side corresponding to the wall. The support arm (3) can pass through the connection port to provide support for the box (1). An opening (31) is provided on the support arm (3). A limiting member (4) is sleeved on the outside of the support arm (3). The limiting member (4) has a limiting shoulder (42) that abuts against the inner wall of the box (1) to limit the lateral displacement of the box (1) relative to the support arm (3). A pin is provided on the limiting member (4). 43), the support arm (3) is provided with a ball locking structure (5), the pin (43) can be inserted and cooperate with the ball locking structure (5) to form a locking connection; the ball locking structure (5) is provided with an unlocking hole (532), the unlocking hole (532) is aligned with the opening (31) so that the unlocking device (6) can be inserted into the unlocking hole (532) through the opening (31) and trigger the ball locking structure (5) to release the locking connection.

2. The detachable energy metering box according to claim 1, characterized in that: The support arm (3) is fixedly connected to the mounting bracket (2). The mounting bracket (2) is provided with mounting holes (21). The mounting holes (21) are used to cooperate with fasteners to fix the mounting bracket (2) to the wall.

3. The detachable energy metering box according to claim 1, characterized in that: The limiting member (4) includes a sleeve (41), which is sleeved on the outside of the support arm (3), and the limiting shoulder (42) is located at the end of the sleeve (41) and abuts against the inner wall of the box (1).

4. The detachable power metering box according to claim 3, characterized in that: The ejector pin (43) is provided with a shallow groove (431), which is used to engage with the ball (52) in the ball locking structure (5) to restrict the axial withdrawal of the ejector pin (43).

5. A detachable energy metering box according to claim 4, characterized in that, The ball locking structure (5) is disposed inside the support arm (3). A receiving cavity for accommodating the ball locking structure (5) is formed inside the support arm (3). A cylinder (51) is disposed inside the receiving cavity. The side wall of the cylinder (51) forms a receiving position for the ball (52) to move radially. The cylinder (51) is fixedly connected to the pressure plate (53). The pressure plate (53) applies a restoring force to the cylinder (51) under the action of the spring (54) so ​​that the ball (52) remains locked.

6. The detachable energy metering box according to claim 5, characterized in that: The ball locking structure (5) includes a tapered sleeve (55). The narrow end of the tapered sleeve (55) is fixedly connected to the inner wall of the support arm (3), and the other end abuts against the pressure plate (53). The tapered sleeve (55) is sleeved on the outside of the cylinder (51) and forms a radial constraint on the ball (52), so that the ball (52) can engage with the shallow groove (431) of the ejector pin (43) to achieve locking.

7. The detachable energy metering box according to claim 1, characterized in that: The support arm (3) is provided with a guide port (56), which is used to guide the insertion of the ejector pin (43).

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