Fixing structure of parts for electric meter box

Abstract

The utility model relates to the technical field of electric meter boxes, and discloses a fixing structure of parts for an electric meter box, which comprises a connecting rod in threaded connection with the outer side of a mounting seat, a plurality of through holes arranged on the outer side of the conical surface of an inner sleeve, balls arranged in the through holes, a ring body arranged on the inner wall of the inner sleeve, and a cover body arranged at the upper end of a shell. A spring is installed between the cover body and the ring body, the conical face of the connecting rod extends into the inner sleeve, and the end of the connecting rod abuts against the lower surface of the cover body. The mounting hole of the shell is aligned with the connecting rod, the shell is pushed downwards, the connecting rod extends into the inner sleeve, the conical end face of the connecting rod makes contact with the balls in the inner sleeve, radial extrusion force is converted into axial displacement of the inner sleeve through interaction of the conical faces, the inner sleeve is pushed to move upwards to compress the spring, and the inner sleeve is driven to rotate. When the radial pressure of the ball on the connecting rod and the reactive force of the spring are balanced, the peripheral side surface of the ball abuts against the conical surface of the shell to form stable radial locking, and the quick fixation of the electric meter frame is completed.

Description

Technical Field

[0001] This utility model relates to the field of meter box technology, specifically to a fixing structure for a component of an meter box. Background Technology

[0002] A meter box is a special enclosure used for the centralized installation, protection, and measurement of electricity meters and related power distribution equipment.

[0003] In the existing technology, the meter bracket, as a key component for fixing the electricity meter in the meter box, usually needs to be fastened to the mounting base in the box by multiple bolts. This fixing method not only requires tightening multiple bolts one by one, which is cumbersome and time-consuming, but also inconvenient to install in a small box. Utility Model Content

[0004] The purpose of this utility model is to provide a fixing structure for components of an electric meter box, which solves the problem that existing electric meter frames need to be fastened to the mounting base inside the box by multiple bolts, which is cumbersome and time-consuming, and inconvenient to install in a small box.

[0005] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution:

[0006] This utility model relates to a fixing structure for a component of an electric meter box, comprising a connecting rod threaded to the outside of a mounting base, one end of which has a tapered surface. A housing is provided on the outside of the connecting rod, and an inner sleeve is provided inside the housing. Both the housing and the inner sleeve have tapered surfaces at their lower ends. Multiple through holes are provided on the outer side of the tapered surface of the inner sleeve, and each through hole contains a ball bearing. An annular body is provided on the inner wall of the inner sleeve. A cover is installed on the upper end of the housing, and a spring is installed between the cover and the annular body. The tapered surface of the connecting rod extends into the inner sleeve, and its end abuts against the lower surface of the cover.

[0007] Furthermore, multiple limiting grooves are formed on the peripheral side of the connecting rod, the number of limiting grooves being the same as that of the ball bearings, and the surface of the ball bearings is embedded in the corresponding limiting grooves.

[0008] Furthermore, a nut is threaded to the end of the connecting rod away from the tapered surface, and an elastic washer is fitted on the outside of the connecting rod. One end of the elastic washer contacts the outside of the mounting base, and the other end contacts the outside of the nut.

[0009] Furthermore, the end of the connecting rod away from the tapered end face is provided with a tapered internal threaded hole, and multiple second slots are provided at equal intervals on the outer side of the connecting rod, with one end of each second slot extending into the interior of the tapered internal threaded hole.

[0010] Furthermore, the tapered internal thread hole is connected to a tapered bolt.

[0011] Furthermore, both ends of the elastic washer are provided with anti-slip ridges.

[0012] This utility model has the following beneficial effects:

[0013] (1) This utility model aligns the mounting hole of the outer shell with the connecting rod, pushes the outer shell downward, and makes the connecting rod extend into the inner sleeve. The conical end face of the connecting rod contacts the ball inside the inner sleeve. Through the interaction of the conical surfaces, the radial extrusion force is converted into the axial displacement of the inner sleeve, which pushes the inner sleeve to move upward and compress the spring. When the radial pressure of the ball on the connecting rod and the reaction force of the spring reach a balance, the circumferential side of the ball abuts against the conical surface of the outer shell, forming a stable radial lock and completing the rapid fixing of the meter frame.

[0014] (2) When the conical bolt of this utility model is screwed into the conical internal thread hole of the connecting rod, its conical structure radially expands the elastic connecting rod section of the second slot through the wedge action, so that the outer thread and the inner wall of the nut produce an interference fit, and a continuous radial pressure is formed through the mechanical expansion effect. Under vibration conditions, the thread pair can still maintain tight contact, which improves the anti-loosening performance of traditional threaded connection, and avoids the risk of connection failure caused by preload decay.

[0015] Of course, any product implementing this utility model does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is an exploded view of the fixed structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the assembly of the fixed structure of this utility model;

[0019] Figure 3 Cross-sectional view of the fixed structure, mounting base and meter frame;

[0020] Figure 4 This is a schematic diagram of the assembly of an electricity meter frame in the existing technology;

[0021] The attached diagram lists the components represented by each number as follows:

[0022] In the diagram: 1. Connecting rod; 2. Outer shell; 4. Inner sleeve; 5. Ball bearing; 6. Cover; 7. Spring; 8. Nut; 9. Elastic washer; 10. Tapered bolt; 11. Mounting base; 12. Meter stand; 13. Meter box. Detailed Implementation

[0023] 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.

[0024] Please see Figures 1-4 As shown, this utility model is a fixing structure for a component of an electric meter box, including a connecting rod 1 threadedly connected to the outside of the mounting base 11, one end of which has a tapered surface. A housing 2 is provided on the outside of the connecting rod 1, and an inner sleeve 4 is provided inside the housing 2. Both the housing 2 and the inner sleeve 4 have tapered surfaces at their lower ends. Multiple through holes are provided on the outside of the tapered surface of the inner sleeve 4, and each through hole is provided with a ball bearing 5. An annular body is provided on the inner wall of the inner sleeve 4. A cover 6 is installed on the upper end of the housing 2, and a spring 7 is installed between the cover 6 and the annular body. The tapered surface of the connecting rod 1 extends into the inner sleeve 4, and its end abuts against the lower surface of the cover 6.

[0025] The inner sleeve 4 is made of ferromagnetic material. The magnetic field generated by the magnetic block will magnetize the inner sleeve 4, and a magnetic attraction will be generated between the two. When the connecting rod 1 is installed in the inner sleeve 4, the peripheral side of the multiple balls 5 abuts against the conical surface of the outer shell 2. When the connecting rod 1 is not installed in the inner sleeve 4, the multiple balls 5 roll into the inner sleeve 4, and the peripheral side of the multiple balls 5 abuts against each other.

[0026] When fixing the meter frame 12, align the mounting hole of the meter frame 12 with the connecting rod 1 on the outside of the mounting base 11, push the meter frame 12 to insert the connecting rod 1 into the mounting hole until the outer surface of the meter frame 12 is in close contact with the outer surface of the mounting base 11. Then align the mounting hole of the outer shell 2 with the connecting rod 1, push the outer shell 2 downward to let the connecting rod 1 extend into the inner sleeve 4. The conical end face of the connecting rod 1 contacts the ball 5 inside the inner sleeve 4. Through the interaction of the conical surfaces, the radial extrusion force is converted into the axial displacement of the inner sleeve 4, pushing the inner sleeve 4 upward to compress the spring 7. When the radial pressure of the ball 5 on the connecting rod 1 and the reaction force of the spring 7 reach a balance, the circumferential side of the ball 5 abuts against the conical surface of the outer shell 2 to form a stable radial lock, thus completing the rapid fixing of the meter frame 12.

[0027] Multiple limiting grooves are opened on the circumferential side of the connecting rod 1. The number of limiting grooves is the same as that of the ball 5. Part of the surface of the ball 5 is embedded in the corresponding limiting groove.

[0028] Among them, after the conical surface of the connecting rod 1 abuts against the lower surface of the cover 6, the connecting rod 1 is rotated so that the contact surface of the limiting groove and the ball 5 are completely matched, transforming the original point contact into surface contact, significantly increasing the frictional torque and preventing accidental loosening.

[0029] The end of the connecting rod 1 away from the tapered surface is threaded with a nut 8. An elastic washer 9 is sleeved on the outside of the connecting rod 1. One end of the elastic washer 9 contacts the outside of the mounting base 11, and the other end contacts the outside of the nut 8.

[0030] When the nut 8 is tightened, it compresses the elastic washer 9 to generate axial preload, which makes the threaded connection between the connecting rod 1 and the mounting base 11 form a continuous compression state, effectively resisting the thread retraction caused by vibration. At the same time, the deformation capacity of the elastic washer 9 compensates for the micro gap between the mounting base 11 and the connecting rod 1, disperses local stress concentration, and avoids deformation or cracking of the threaded hole during long-term use.

[0031] Both ends of the elastic washer 9 are provided with anti-slip ridges;

[0032] Among them, the anti-slip ridges are serrated, and the serrated textures at both ends are embedded in the contact surfaces of the nut 8 and the mounting base 11 to form an anti-rotation engagement, which significantly improves static friction and effectively blocks the circumferential slippage tendency of the elastic washer 9 under vibration.

[0033] The end of the connecting rod 1 away from the tapered end face is provided with a tapered internal thread hole, and multiple second slots are provided at equal intervals on the outer side of the connecting rod 1, with one end of each second slot extending into the interior of the tapered internal thread hole;

[0034] A tapered bolt 10 is connected to the internal thread of the tapered internal threaded hole;

[0035] When the tapered bolt 10 is screwed into the tapered internal thread hole of the connecting rod 1, its tapered structure radially expands the elastic connecting rod 1 section with the second slot through the wedge action, so that the outer thread and the inner wall of the nut 8 produce an interference fit. Through the mechanical expansion effect, a continuous radial pressure is formed, which can still maintain the tight contact of the thread pair under vibration conditions. This improves the anti-loosening performance of traditional threaded connections and avoids the risk of connection failure caused by the decay of preload.

[0036] In use, first align the end of the connecting rod 1 with the tapered internal threaded hole with the threaded hole of the mounting base 11, rotate the connecting rod 1 so that its threaded section is screwed into the mounting base 11 until it is fully in place, then put the elastic washer 9 on the outside of the connecting rod 1, and then screw the nut 8 into the connecting rod 1. After the nut 8 is tightened, it squeezes the elastic washer 9 to generate axial preload, so that the threaded connection between the connecting rod 1 and the mounting base 11 forms a continuous compression state, effectively resisting the thread retraction caused by vibration. At the same time, the deformation capacity of the elastic washer 9 compensates for the micro gap between the mounting base 11 and the connecting rod 1, and disperses the local stress concentration. Then, screw the tapered bolt 10 into the tapered internal threaded hole of the connecting rod 1. Its tapered structure radially expands the second slotted elastic connecting rod 1 section through the wedge action, so that the outer thread and the inner wall of the nut 8 form an interference fit. Through the above steps, the fixed installation between the mounting base 11 and the connecting rod 1 can be completed. Then, the mounting base 11 is fixedly installed in the meter box 13 with bolts.

[0037] When the meter frame 12 needs to be installed on the mounting base 11, align the mounting hole of the meter frame 12 with the connecting rod 1 on the outside of the mounting base 11, push the meter frame 12 to insert the connecting rod 1 into the mounting hole until the outer surface of the meter frame 12 is in close contact with the outer surface of the mounting base 11, then align the mounting hole of the outer shell 2 with the connecting rod 1, push the outer shell 2 downward to let the connecting rod 1 extend into the inner sleeve 4, the conical end face of the connecting rod 1 contacts the ball 5 in the inner sleeve 4, and the radial extrusion force is converted into the axial displacement of the inner sleeve 4 through the interaction of the conical surfaces, pushing the inner sleeve 4 upward to compress the spring 7. When the radial pressure of the ball 5 on the connecting rod 1 and the reaction force of the spring 7 reach equilibrium, the circumferential side of the ball 5 abuts against the conical surface of the outer shell 2. After the conical surface of the connecting rod 1 abuts against the lower surface of the cover 6, rotate the connecting rod 1 so that the contact surface of the limiting groove and the ball 5 is completely matched, converting the original point contact into surface contact, and completing the rapid fixing of the meter frame 12;

[0038] When the meter bracket 12 needs to be removed from the mounting base 11, the magnetic block is attracted to the cover 6. The magnetic field generated by the magnetic block magnetizes the iron inner sleeve 4 and subject it to an upward magnetic attraction. Under the action of the magnetic force, the inner sleeve 4 drives the ball 5 to move upward along the axis. At the same time, the compressed spring 7 stores energy. As the ball 5 moves upward, it gradually gets out of the constraint area of ​​the conical surface of the outer shell 2, releasing the radial locking force on the connecting rod 1. At this time, the outer shell 2 can be lifted directly upward to separate the inner sleeve 4 from the connecting rod 1, and then the meter bracket 12 can be easily removed.

[0039] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A fixing structure for components used in an electric meter box, characterized in that: The connecting rod (1) is threaded to the outside of the mounting base (11), and one end of the connecting rod (1) has a tapered surface. The outer side of the connecting rod (1) is provided with a housing (2), and the inner sleeve (4) is provided inside the housing (2). The lower ends of the housing (2) and the inner sleeve (4) are both provided with tapered surfaces. The outer side of the tapered surface of the inner sleeve (4) is provided with multiple through holes, and each through hole is provided with a ball (5). The inner wall of the inner sleeve (4) is provided with a ring, and the upper end of the outer shell (2) is provided with a cover (6), and a spring (7) is installed between the cover (6) and the ring. The tapered surface of the connecting rod (1) extends into the inner sleeve (4), and its end abuts against the lower surface of the cover (6).

2. The fixing structure for a component of an electric meter box according to claim 1, characterized in that: The connecting rod (1) has multiple limiting grooves on its circumferential side, the number of which is the same as that of the ball (5), and a portion of the surface of the ball (5) is embedded in the corresponding limiting groove.

3. The fixing structure for a component of an electric meter box according to claim 1, characterized in that: The end of the connecting rod (1) away from the tapered surface is threaded with a nut (8), and an elastic washer (9) is sleeved on the outside of the connecting rod (1). One end of the elastic washer (9) contacts the outside of the mounting base (11), and the other end contacts the outside of the nut (8).

4. The fixing structure for a component of an electric meter box according to claim 1, characterized in that: The connecting rod (1) has a tapered internal threaded hole at one end away from the tapered end face, and multiple second slots are equally spaced on the outer side of the connecting rod (1), with one end of each second slot extending into the tapered internal threaded hole.

5. The fixing structure for a component of an electric meter box according to claim 4, characterized in that: The tapered internal threaded hole is connected to a tapered bolt (10).

6. The fixing structure for a component of an electric meter box according to claim 3, characterized in that: Both ends of the elastic washer (9) are provided with anti-slip ridges.

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