Shell of three-phase four-wire electronic electric energy meter

Abstract

The utility model discloses a three-phase four-wire electronic type electric energy meter shell, which comprises a bottom shell, a meter cover covering the bottom shell, a terminal cover arranged on the meter cover and a display screen arranged on the meter cover, a buckling structure is arranged at the position, close to one side of the terminal cover, between the bottom shell and the meter cover, a fastening structure is arranged at the position, away from one side of the terminal cover, between the bottom shell and the meter cover, and a locking structure matched with the buckling structure is arranged between the bottom shell and the meter cover. The locking structure drives the bottom shell and the meter cover to move oppositely in a locking mode. The utility model has the following advantages and effects: on the basis that the layout space of the electric energy meter is not interfered, the meter cover and the bottom shell can be effectively locked and sealed, so that the failure rate of the electric energy meter is reduced, and the service life of the electric energy meter is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of electric energy meters, in particular to a three-phase four-wire electronic electric energy meter shell. Background Art

[0002] An energy meter is a meter used to measure how much electricity a user consumes, that is, an instrument that measures electrical work. It is usually installed on the main circuit of a household circuit so that it can measure the energy consumed by the entire household circuit.

[0003] A Chinese patent with announcement number CN202083725U discloses a single-phase remote fee control smart electricity meter housing, which includes a meter cover, a bottom shell, a terminal cover, a terminal seat and a hook. The test terminal part adopts a layered design, a protrusion is set on the back of the bottom shell, the terminal cover adopts a toothed design, and the hook has a folded surface anti-slip design.

[0004] In the above patent, the cover and the bottom shell are connected by means of hooks and clips. However, due to the influence of the hook and clip structure and processing form, the two are very likely to produce material shrinkage tolerance and assembly tolerance between the two during the injection molding process; plus the snap-fit ​​structure cannot form a more effective locking force between the two, resulting in the inability of the assembly structure to form an effective seal between the cover and the bottom shell, which can easily cause the electronic components in the cover to be damp and cause failures. In addition, many existing electric energy meters are affected by their compact layout structure design, and it is impossible to use the fastener structure to achieve effective sealing between the cover and the bottom shell. Therefore, how to achieve effective sealing between the cover and the bottom shell without interfering with the layout space of the electric energy meter has become a technical problem that technicians have to overcome. Utility Model Content

[0005] The utility model aims to provide a three-phase four-wire electronic electric energy meter housing, which can realize effective locking and sealing between a meter cover and a bottom shell without interfering with the layout space of the electric energy meter, thereby reducing the failure rate of the electric energy meter and extending its service life.

[0006] The above technical objectives of the utility model are achieved through the following technical solutions: a three-phase four-wire electronic electric energy meter housing, comprising a bottom shell, a meter cover arranged on the bottom shell, a terminal cover installed on the meter cover and a display screen arranged on the meter cover, a snap-fit ​​structure is provided between the bottom shell and the meter cover at a position close to one side of the terminal cover, a fastening structure is provided between the bottom shell and the meter cover at a position away from one side of the terminal cover, a locking structure cooperating with the snap-fit ​​structure is provided between the bottom shell and the meter cover, and when the snap-fit ​​structure is in a snap-fit ​​state, the locking structure drives the bottom shell and the meter cover to move toward each other in a locking manner.

[0007] By adopting the above technical solution, the buckle structure cooperates with the fastening structure to achieve the fixation of the meter cover and the bottom shell. Due to the limitation of the layout space of the electric energy meter, the fastening structure can only be set on one side of the meter cover, resulting in it only generating effective fastening and sealing force on this side of the meter cover. Therefore, the locking structure is set to compensate for the locking and sealing force on the other side of the meter cover, and cooperate with the buckle structure to fasten and seal the side of the meter cover corresponding to the buckle structure, so as to achieve all-round effective locking and sealing of the meter cover, and the setting structure will not interfere with the layout space of the electric energy meter, so as to reduce the failure rate of the electric energy meter and extend its service life.

[0008] It is further configured that: the buckle structure is configured as at least two groups, the buckle structure includes a claw arranged on the cover, a slot formed in the claw, and a block arranged on the bottom shell and engaged with the slot, when the block is engaged with the slot, the bottom shell and the cover are restricted from being separated.

[0009] By adopting the above technical solution, the card block is connected to the card slot, thereby constituting a limit for both the bottom shell and the cover, thereby preventing the two from being separated to achieve the purpose of buckling and fixing.

[0010] It is further configured as follows: the fastening structure includes at least two fasteners, each of which connects the cover and the bottom shell.

[0011] By adopting the above technical solution, the fastener connects the cover and the bottom shell to fasten both the cover and the bottom shell.

[0012] It is further configured as follows: the locking structure is configured as at least two groups and are configured one-to-one corresponding to the at least two groups of snap structures, the locking structure includes a rotating rod which is sealingly rotatably arranged on the bottom shell and whose two ends extend to the block and the outside respectively, an eccentric pressing wheel which is rotatably arranged on the block and rotates with the rotating rod and presses against the slot, and a non-return member which limits the reverse rotation of the rotating rod, a pressing portion which presses against the eccentric pressing wheel is formed on the slot, and the pressing portion of the eccentric pressing wheel drives the cover and the bottom shell to snap together and press against each other.

[0013] By adopting the above technical solution, after the card slot and the card block are fastened and fixed, the rotating rod controls the eccentric pressing wheel to rotate to press against the pressing part on the card slot, thereby generating a pressing driving force to drive the cover and the bottom shell to press against each other, thereby achieving an effective locking and sealing effect. The rotating rod after rotation is limited by the anti-return member to rotate in the reverse direction, thereby preventing the structure from loosening and ensuring the feasibility of the structure.

[0014] It is further configured as follows: at least two of the rotating rods are fixedly connected via a synchronization rod, the anti-return member is a sealed one-way bearing arranged between the rotating rod and the bottom shell, and a rotational seal is achieved between the rotating rod and the bottom shell via the sealed one-way bearing.

[0015] By adopting the above technical solution, the setting of the synchronization rod makes the control operation more convenient, and the dual functions of anti-return and sealing are achieved by setting a sealed one-way bearing, which is more suitable for the small installation environment of the electric energy meter.

[0016] It is further configured as follows: the terminal cover is rotatably arranged on the table cover by a rotating arm, a positioning structure is formed between the table cover and the rotating arm, and the positioning structure positions the terminal cover in an open or closed state and can realize switching of the terminal cover between the open and closed states.

[0017] By adopting the above technical solution, the rotating arm rotates with the terminal cover and cooperates with the positioning structure to position the terminal cover in an open or closed state, thereby making it easier to connect the circuit and perform maintenance operations, so that workers will not be interfered with the maintenance actions due to the position of the terminal cover during the operation, making the workers' operation more convenient.

[0018] It is further configured as follows: the positioning structure is a positioning protrusion arranged on the watch cover and located on one side of the rotation path of the rotating arm, and the positioning protrusion presses against the rotating arm to achieve positioning in the two states of opening and closing.

[0019] By adopting the above technical solution, the rotating arm abuts against the positioning protrusion during the rotation process, thereby driving the rotating arm to be positioned at the positions formed on both sides of the positioning protrusion.

[0020] In summary, the utility model has the following beneficial effects: the utility model can achieve effective locking and sealing of the meter cover and the bottom shell without interfering with the layout space of the electric energy meter, thereby reducing the failure rate of the electric energy meter and extending its service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of an embodiment;

[0022] Figure 2 This is a schematic diagram of the structure in which the terminal cover is opened in the embodiment;

[0023] Figure 3 It is a partial exploded view of an embodiment;

[0024] Figure 4 is a cross-sectional view of an embodiment;

[0025] Figure 5 It is a schematic diagram of the local structure of an embodiment.

[0026] In the figure: 1. bottom shell; 2. meter cover; 3. terminal cover; 4. display screen; 5. snap-fit ​​structure; 51. claw; 52. slot; 53. block; 6. locking structure; 61. rotating rod; 62. eccentric pressing wheel; 63. anti-return member; 7. fastener; 8. pressing part; 9. synchronization rod; 10. rotating arm; 11. positioning protrusion. DETAILED DESCRIPTION

[0027] The utility model is further described in detail below in conjunction with the accompanying drawings.

[0028] refer to Figures 1 to 5 A three-phase four-wire electronic electric energy meter housing includes a bottom shell 1, a meter cover 2 covered on the bottom shell 1, a terminal cover 3 installed on the meter cover 2, and a display screen 4 fixedly arranged on the meter cover 2. A buckle structure 5 is provided at a position between the bottom shell 1 and the meter cover 2 close to one side of the terminal cover 3, and a fastening structure is provided at a position between the bottom shell 1 and the meter cover 2 away from one side of the terminal cover 3. A locking structure 6 matching the buckle structure 5 is provided between the bottom shell 1 and the meter cover 2. When the buckle structure 5 is in a buckled state, the locking structure 6 drives the bottom shell 1 and the meter cover 2 to move toward each other in a locking manner.

[0029] The buckle structure 5 is provided in at least two groups and preferably in two groups, and the buckle structure 5 includes a claw 51 integrally provided on the watch cover 2, a slot 52 formed in the claw 51, and a block 53 integrally provided on the bottom shell 1 and engaged with the slot 52. When the block 53 is engaged with the slot 52, the bottom shell 1 and the watch cover 2 are restricted from being separated. The fastening structure includes at least two fasteners 7, which are screws, each of which passes through the watch cover 2 and is threadedly connected to the bottom shell 1.

[0030] The locking structure 6 is provided in at least two groups and preferably in two groups and is provided in one-to-one correspondence with the two groups of buckle structures 5. The locking structure 6 includes a rotating rod 61 which is provided in a sealed rotation on the bottom shell 1 and whose two ends extend to the block 53 and the outside respectively, an eccentric pressing wheel 62 which is provided in a rotation on the block 53 and fixedly connected to the rotating rod 61 and pressed against the slot 52, and a non-returning member 63 which limits the reverse rotation of the rotating rod 61. A pressing portion 8 which presses against the eccentric pressing wheel 62 is formed on the slot 52, and the pressing portion 8 of the eccentric pressing wheel 62 drives the watch cover 2 and the bottom shell 1 to buckle and press against each other, and the block 53 limits the eccentric pressing wheel 62 from moving along the axial direction of the rotating rod 61.

[0031] The two rotating rods 61 are integrally connected via a synchronous rod 9, and the anti-return member 63 is a sealed one-way bearing disposed between the rotating rod 61 and the bottom shell 1, and the rotating rod 61 and the bottom shell 1 are rotated and sealed via the sealed one-way bearing. The rotating rod 61 is fixedly connected to the inner ring of the sealed one-way bearing, and the bottom shell 1 is fixedly connected to the outer ring of the sealed one-way bearing.

[0032] The terminal cover 3 is rotatably arranged on the table cover 2 through the rotating arm 10, and the terminal cover 3 is integrally connected to the rotating arm 10. A positioning structure is formed between the table cover 2 and the rotating arm 10, and the positioning structure positions the terminal cover 3 in an open or closed state and can realize the switching of the terminal cover 3 between the open and closed states. The positioning structure is a positioning protrusion 11 integrally arranged on the outer wall of the table cover 2 and located on one side of the rotating path of the rotating arm 10, and the positioning protrusion 11 presses against the rotating arm 10 to realize the positioning in the open and closed states.

[0033] This specific embodiment is merely an explanation of the present invention and is not a limitation of the present invention. After reading this specification, those skilled in the art may make non-creative modifications to the present embodiment as needed, but such modifications are protected by patent law as long as they are within the scope of the claims of the present invention.

Claims

1. A three-phase four-wire electronic electric energy meter housing, comprising a bottom housing (1), a meter cover (2) arranged on the bottom housing (1), a terminal cover (3) mounted on the meter cover (2), and a display screen (4) arranged on the meter cover (2), characterized in that: A snap-fit ​​structure (5) is provided between the bottom shell (1) and the cover (2) at a position close to the terminal cover (3), and a fastening structure is provided between the bottom shell (1) and the cover (2) at a position away from the terminal cover (3). A locking structure (6) cooperating with the snap-fit ​​structure (5) is provided between the bottom shell (1) and the cover (2). When the snap-fit ​​structure (5) is in a fastened state, the locking structure (6) drives the bottom shell (1) and the cover (2) to move toward each other in a locking manner.

2. The three-phase four-wire electronic energy meter housing according to claim 1 is characterized in that: The buckle structure (5) is provided in at least two groups, and the buckle structure (5) comprises a claw (51) provided on the surface cover (2), a slot (52) formed in the claw (51), and a block (53) provided on the bottom shell (1) and buckled with the slot (52); when the block (53) is buckled with the slot (52), the bottom shell (1) and the surface cover (2) are restricted from being separated.

3. The three-phase four-wire electronic energy meter housing according to claim 1 is characterized in that: The fastening structure comprises at least two fasteners (7), and each of the fasteners (7) connects the cover (2) and the bottom shell (1).

4. The three-phase four-wire electronic energy meter housing according to claim 2 is characterized in that: The locking structure (6) is provided in at least two groups and is provided in one-to-one correspondence with the at least two groups of buckle structures (5). The locking structure (6) comprises a rotating rod (61) which is sealingly rotatably provided on the bottom shell (1) and whose two ends extend to the block (53) and the outside respectively, an eccentric pressing wheel (62) which is rotatably provided on the block (53) and rotates with the rotating rod (61) and presses against the slot (52), and a non-return member (63) which limits the reverse rotation of the rotating rod (61). A pressing portion (8) which presses against the eccentric pressing wheel (62) is formed on the slot (52). The eccentric pressing wheel (62) presses against the pressing portion (8) to drive the cover (2) and the bottom shell (1) to press against each other.

5. The three-phase four-wire electronic energy meter housing according to claim 4 is characterized in that: At least two of the rotating rods (61) are fixedly connected via a synchronization rod (9), and the anti-return member (63) is a sealed one-way bearing arranged between the rotating rod (61) and the bottom shell (1), and a rotational seal is achieved between the rotating rod (61) and the bottom shell (1) via the sealed one-way bearing.

6. The three-phase four-wire electronic electric energy meter housing according to claim 1 is characterized in that: The terminal cover (3) is rotatably arranged on the table cover (2) via a rotating arm (10); a positioning structure is formed between the table cover (2) and the rotating arm (10); the positioning structure positions the terminal cover (3) in an open or closed state and enables the terminal cover (3) to switch between the open and closed states.

7. The three-phase four-wire electronic energy meter housing according to claim 6 is characterized in that: The positioning structure is a positioning protrusion (11) arranged on the cover (2) and located on one side of the rotation path of the rotating arm (10); the positioning protrusion (11) presses against the rotating arm (10) to achieve positioning in the two states of opening and closing.

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