CN220515183U - Bending machine for power distribution cabinet production - Google Patents
Bending machine for power distribution cabinet production Download PDFInfo
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- CN220515183U CN220515183U CN202322150065.1U CN202322150065U CN220515183U CN 220515183 U CN220515183 U CN 220515183U CN 202322150065 U CN202322150065 U CN 202322150065U CN 220515183 U CN220515183 U CN 220515183U
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- bending
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- workbench
- power distribution
- panel
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- 238000005452 bending Methods 0.000 title claims abstract description 86
- 238000009826 distribution Methods 0.000 title claims abstract description 31
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 12
- 230000007246 mechanism Effects 0.000 claims abstract description 53
- 230000005540 biological transmission Effects 0.000 claims description 12
- 230000001360 synchronised effect Effects 0.000 claims description 5
- 238000003466 welding Methods 0.000 claims description 4
- 238000003780 insertion Methods 0.000 claims description 3
- 230000037431 insertion Effects 0.000 claims description 3
- 238000009434 installation Methods 0.000 claims 2
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000005489 elastic deformation Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005381 potential energy Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- Bending Of Plates, Rods, And Pipes (AREA)
Abstract
The utility model relates to the technical field of power distribution cabinet production equipment, and discloses a bending machine for power distribution cabinet production, which comprises a workbench, wherein two groups of auxiliary guide mechanisms are symmetrically arranged on the upper surface of the workbench; through pushing mechanism, stop gear, workstation and the cooperation between the mechanism of bending, the switch board panel is placed at the upper surface of workstation, servo motor drive wheel drives the driven driving wheel of hold-in range drive threaded rod one section to push pedal on the movable block through the threaded rod promotes the panel to the mechanism below of bending, and when panel removes to stop gear, spacing roller and panel fixed connection, the spring is pressed and is contracted, thereby carry out spacingly to the panel, the cylinder starts hydraulic stem and stretches out the work of bending to the panel, thereby adjust the length of bending after the panel removes through the rotation number of turns of control servo motor drive threaded rod, stop gear has improved the stability when panel bends.
Description
Technical Field
The utility model relates to the technical field of power distribution cabinet production equipment, in particular to a bending machine for power distribution cabinet production.
Background
The power distribution cabinet (box) is a final-stage device of a power distribution system, and the power distribution cabinet (box) is a generic name of a motor control center. The power distribution cabinet is used in the occasions with dispersed load and less loops; the motor control center is used for occasions with concentrated load and more loops. The electric energy of a certain circuit of the upper-level power distribution equipment is distributed to nearby loads, and the cabinet body of the power distribution cabinet is often bent by a bending machine in the production process;
in the prior art, publication No.: the Chinese utility model content of CN211613907U discloses a bending machine for producing a power distribution cabinet, which saves labor and improves practicability; the device comprises a framework, four groups of stability adjusting devices, two groups of hinges, a bending plate, a connecting seat, a first cylinder and a clamping device, wherein four groups of supporting legs are arranged at the bottom end of the framework;
the technical scheme is inconvenient to continuously bend the panel of the power distribution cabinet, the panel is required to be pressed in the bending process, the panel is not pressed, and the panel is easy to skew or the bending angle is insufficient in bending, so that a bending machine for the production of the power distribution cabinet is required to be provided.
Disclosure of Invention
The utility model aims to provide a bending machine for power distribution cabinet production, which is convenient for continuously bending a power distribution cabinet plate, is convenient for adjusting the bending size of the power distribution cabinet, is convenient for adjusting the size of the power distribution cabinet, has higher stability when bending the power distribution cabinet plate, and avoids the skew or insufficient bending angle when bending the plate so as to solve the problems in the prior art.
In order to achieve the above purpose, the present utility model provides the following technical solutions: the bending machine for the production of the power distribution cabinet comprises a workbench, wherein two groups of auxiliary guide mechanisms are symmetrically arranged on the upper surface of the workbench, a limiting mechanism is arranged at one end of the upper surface of the workbench, a bending mechanism is arranged at one end of the limiting mechanism, and a pushing mechanism is arranged at the other end of the upper surface of the workbench;
the pushing mechanism comprises a servo motor, a threaded rod and a push plate, wherein the servo motor, the threaded rod and the push plate are arranged at one end of the lower surface of the workbench, the upper surface of the workbench is provided with a mounting hole for the threaded rod to be arranged, an output shaft of the servo motor is in transmission connection with a rotating shaft, one end of the rotating shaft is fixedly connected with a driving wheel, one end of the rotating shaft penetrates through the mounting hole to be in transmission connection with a driven wheel, the driving wheel is in transmission connection with the driven wheel through a synchronous belt, and the lower surface of the push plate is welded with a movable block for the threaded rod to be in threaded connection with in the middle;
the limiting mechanism comprises two groups of U-shaped plates symmetrically welded on the upper surface of the workbench and positioning plates welded at the upper ends of the two groups of U-shaped plates, guide rods are welded at two ends of the lower surface of the positioning plates, connecting rods are connected to the lower ends of the two groups of guide rods in a sliding mode, limiting rollers are sleeved on the outer sides of the connecting rods in a rotating mode, springs are sleeved on the outer sides of the two groups of guide rods, and the lower ends of the springs are in contact with the outer sides of the connecting rods.
Preferably, the upper surface of the workbench is symmetrically provided with two groups of sliding grooves and two rows of reaming holes by taking the mounting groove as a symmetry axis, each row of reaming holes is provided with a plurality of reaming holes, and the plurality of reaming holes are arranged at equal intervals.
Preferably, both ends of the lower surface of the push plate are welded with sliding blocks, the two groups of sliding blocks are respectively in sliding connection with the two groups of sliding grooves, and the movable block is in sliding connection with the mounting groove.
Preferably, the two sets of auxiliary guide mechanisms comprise connecting plates which are arranged in parallel with the workbench, a plurality of sets of through holes are formed in the lower surface of each connecting plate, and guide rollers are hinged in the plurality of sets of through holes.
Preferably, a plurality of groups of guide rollers of each group of auxiliary guide mechanism are hinged with each row of hinge holes respectively, and the distance between the two groups of connecting plates is larger than the length of the push plate.
Preferably, a bottom groove is formed in one end, far away from the servo motor, of the lower surface of the workbench, the cross section of the bottom groove is arranged in a right-angled triangle, and a supporting frame is welded on the lower surface of the workbench.
Preferably, the bending mechanism comprises an extension plate welded on one side of the positioning plate, an air cylinder is mounted on the upper surface of the extension plate, a bending plate is arranged in parallel under the extension plate, and a plurality of groups of connecting cylinders are welded on the upper surface of the bending plate.
Preferably, the hydraulic rod of the cylinder penetrates through the extension plate and is fixedly connected with one group of connecting cylinders, the other two groups of connecting cylinders are fixedly connected with limiting rods, the upper ends of the two groups of limiting rods penetrate through the extension plate in a sliding mode, and limiting blocks are welded at the upper ends of the two groups of limiting rods.
Preferably, one side of the extension plate and one side of the workbench are arranged on the same plane, the cross section of the bending plate is arranged in a right trapezoid shape, and one end angle of the bending plate and one side of the workbench are arranged on the same plane.
Preferably, sliding holes for sliding insertion of the guide rods are formed in two ends of the outer side of the connecting rod, the two ends of the outer side of the connecting rod are respectively connected with the inner sides of the two groups of U-shaped plates in a sliding mode, and the outer side of the limiting roller is abutted to the upper surface of the workbench.
Compared with the prior art, the utility model has the beneficial effects that:
1. according to the utility model, the power distribution cabinet plate is arranged on the upper surface of the workbench through the cooperation between the pushing mechanism, the limiting mechanism, the workbench and the bending mechanism, the servo motor drives the driving wheel to drive the driven wheel of one section of the synchronous belt driving threaded rod, so that the push plate on the movable block is driven by the threaded rod to push the plate below the bending mechanism, when the plate moves to the limiting mechanism, the limiting roller is fixedly connected with the plate, the spring is compressed and contracted, the plate is limited, the hydraulic rod is started to extend out to bend the plate, the bending length of the plate after the plate moves is adjusted by controlling the rotation number of the servo motor driving threaded rod, and the limiting mechanism improves the stability of the plate when the plate is bent.
2. According to the utility model, through the cooperation between the auxiliary guide mechanism and the workbench, a plurality of groups of guide rollers arranged on the auxiliary guide mechanism are arranged on the lower surface of the connecting plate and correspond to a plurality of groups of hinge holes, so that the specification of the conduit can be changed according to the specification of the plate, and meanwhile, the guide mechanism is convenient for guiding the plate when moving, and the guide roller is matched with the push plate to avoid the deflection of the plate when moving and bending;
3. according to the utility model, through the cooperation between the limiting mechanism and the bending mechanism, the limiting roller of the limiting mechanism limits the plate through the self gravity and the elasticity of the spring, so that the bending plate is prevented from tilting one end of the plate during the bending time of the plate, the number of turns of the spring is more, the roller is prevented from being jacked during the bending of the plate, the bending quality of the plate is improved, and the bending work is continuously carried out.
Drawings
FIG. 1 is a schematic diagram of a front view of the present utility model;
FIG. 2 is a schematic view of the bottom view of the present utility model;
FIG. 3 is a schematic view of the upper surface structure of the workbench according to the utility model;
FIG. 4 is a schematic diagram of a pushing mechanism according to the present utility model;
FIG. 5 is a schematic view of an auxiliary guide mechanism according to the present utility model;
fig. 6 is a schematic structural diagram of a limiting mechanism and a bending mechanism of the present utility model.
In the figure: 1. a work table; 2. a support frame; 3. a pushing mechanism; 31. a servo motor; 32. a rotation shaft; 33. a driving wheel; 34. a synchronous belt; 35. driven wheel; 36. a threaded rod; 37. a push plate; 38. a movable block; 39. a slide block; 4. an auxiliary guide mechanism; 41. a connecting plate; 42. a through hole; 43. a guide roller; 5. a limiting mechanism; 51. a positioning plate; 52. a U-shaped plate; 53. a connecting rod; 531. a slide hole; 54. limiting roller; 55. a guide rod; 56. a spring; 6. a bending mechanism; 61. an extension plate; 62. a cylinder; 63. a limit rod; 64. a limiting block; 65. a bending plate; 66. a connecting cylinder; 7. a bottom groove; 8. a mounting groove; 9. a chute; 10. and (5) reaming.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
Referring to fig. 1-6, the present utility model provides a technical solution: the utility model provides a bender is used in switch board production, includes workstation 1, and the upper surface symmetry of workstation 1 is provided with two sets of auxiliary guide mechanism 4, and the one end of workstation 1 upper surface is provided with stop gear 5, and the one end of stop gear 5 is provided with bending mechanism 6, and the other end of workstation 1 upper surface is provided with pushing mechanism 3;
the pushing mechanism 3 comprises a servo motor 31, a threaded rod 36 and a push plate 37 which are arranged at one end of the lower surface of the workbench 1, the upper surface of the workbench 1 is provided with a mounting hole for the threaded rod 36 to be arranged, an output shaft of the servo motor 31 is in transmission connection with a rotating shaft 32, one end of the rotating shaft 32 is fixedly connected with a driving wheel 33, one end of the rotating shaft 32 penetrates through the mounting hole to be in transmission connection with a driven wheel 35, the driving wheel 33 is in transmission connection with the driven wheel 35 through a synchronous belt 34, and a movable block 38 for the threaded rod 36 to be in threaded connection is welded in the middle of the lower surface of the push plate 37;
the limiting mechanism 5 comprises two groups of U-shaped plates 52 symmetrically welded on the upper surface of the workbench 1 and a positioning plate 51 welded at the upper ends of the two groups of U-shaped plates 52, guide rods 55 are welded at two ends of the lower surface of the positioning plate 51, connecting rods 53 are slidably inserted at the lower ends of the two groups of guide rods 55, limiting rollers 54 are rotatably sleeved on the outer sides of the connecting rods 53, springs 56 are sleeved on the outer sides of the two groups of guide rods 55, and the lower ends of the springs 56 are in contact with the outer sides of the connecting rods 53.
During the use, place the switch board panel on the upper surface of workstation 1, control servo motor 31 starts, servo motor 31's output shaft transmission rotation axis 32, the drive wheel 33 of rotation axis 32 one end passes through the driven shaft of hold-in range 34 transmission threaded rod 36 one end, thereby make threaded rod 36 drive movable block 38 slide in mounting groove 8, be convenient for push pedal 37 promote panel, accessible adjustment servo motor 31 rotates the travel distance of number of turns regulation switch board panel, when panel removes stop gear 5, one side of panel is contradicted spacing roller 54 and is made spring 56 take place elastic deformation, make panel remove the below to spacing roller 54, thereby make spacing roller 54 and panel roll connection, and carry out spacingly to the position of panel under the elastic potential energy effect of gravity and spring 56, start cylinder 62 hydraulic stem drive the work of bending to the switch board panel, the side of bending plate 65 and workstation 1 is buckled, after bending once, rotate certain number of turns once more through control servo motor 31, thereby start the work of bending gear 6 again, stop the travel distance of control panel, thereby panel is carried out to continuous bending, panel is contradicted, when the cabinet 7 is contradicted, the work of bending panel is difficult panel is carried out to the panel is difficult to the work of bending, the panel is carried out to the work of the side of panel is difficult time, the panel is difficult to realize, the work of bending panel is difficult to take out by the staff is difficult to the bending, and the panel is difficult to be taken out by the bending plate bending staff, and the panel is easy to be bent, and is bent by the bending staff is difficult to the bending the panel is easy to realize.
The upper surface of workstation 1 uses mounting groove 8 to be provided with two sets of spouts 9 and two rows of reaming 10 as symmetry axisymmetry, and every row of reaming 10 all is provided with a plurality of, and a plurality of reaming 10 are equidistant setting, is convenient for carry out the dismouting to guide roll 43 through reaming 10, and spout 9 has improved the stability when push pedal 37 removes, avoids the push pedal 37 skew to lead to panel skew, improves the quality that the switch board panel was bent.
Both ends of push pedal 37 lower surface all weld slider 39, and two sets of sliders 39 respectively with two sets of spouts 9 sliding connection, movable block 38 and mounting groove 8 sliding connection, through movable block 38 and mounting groove 8 sliding connection, mounting groove 8 plays the guide effect with spout 9, has improved the stability when push pedal 37 removes.
Two sets of auxiliary guide mechanisms 4 all include with workstation 1 parallel arrangement's connecting plate 41, the multiunit through-hole 42 has been seted up to the lower surface of connecting plate 41, and all articulates in the multiunit through-hole 42 has guide roll 43, leads the direction when the switch board panel removes through multiunit guide roll 43, stability when guaranteeing panel removal and along rectilinear movement, avoids bending the switch board panel and takes place askew.
The guide rollers 43 of each auxiliary guide mechanism 4 are hinged with each row of hinge holes 10 respectively, the distance between the two groups of connecting plates 41 is larger than the length of the push plate 37, the distance between the two groups of auxiliary guide mechanisms 4 is larger than the length of the push plate 37, and the device is suitable for bending plates with different specifications and increases the application range of the device.
The lower surface of workstation 1 is kept away from servo motor 31's one end and is seted up kerve 7, and the transversal right triangle that personally submits of kerve 7 sets up, and the lower surface welding of workstation 1 has support frame 2, has improved the stability of workstation 1 when bending the switch board panel through support frame 2 to kerve 7 avoids panel to carry out 90 when bending one section conflict workstation 1 bottom to lead to panel tip perk, improves the stability that panel was bent.
The bending mechanism 6 comprises an extension plate 61 welded on one side of the positioning plate 51, an air cylinder 62 is mounted on the upper surface of the extension plate 61, bending plates 65 are arranged under the extension plate 61 in parallel, a plurality of groups of connecting cylinders 66 are welded on the upper surface of the bending plates 65, stability of the air cylinder 62 during use is improved through the extension plate 61, and position deviation of the bending plates 65 during lifting is prevented.
The hydraulic rod of cylinder 62 runs through extension board 61 and a set of connecting cylinder 66 fixed connection wherein, two sets of connecting cylinder 66 equal fixedly connected with gag lever post 63 in addition, and two sets of gag lever posts 63 upper ends all slide and run through extension board 61, and the upper end of two sets of gag lever posts 63 all welds stopper 64, through gag lever post 63 and extension board 61 slip grafting, the stability of bending plate 65 rise time has been improved, stopper 64 carries out the spacing to the decline height of bending plate 65 simultaneously, prevent that gag lever post 63 breaks away from extension board 61, improve bending mechanism 6's life.
One side of extension board 61 sets up in the coplanar with one side of workstation 1, and the transversal right trapezoid setting of personally submitting of board 65 of bending sets up in the coplanar with one side of workstation 1, through workstation 1 and the relative one side sliding connection of board 65 of bending, is convenient for bend the work to the switch board panel, improves panel bending efficiency.
Slide holes 531 for sliding insertion of the guide rods 55 are formed in two ends of the outer side of the connecting rod 53, two ends of the outer side of the connecting rod 53 are respectively in sliding connection with the inner sides of the two groups of U-shaped plates 52, the outer sides of the limiting rollers 54 are in contact with the upper surface of the workbench 1, the connecting rod 53 is convenient to lift in a certain range through the guide rods 55 and the slide holes 531 in sliding connection, the two groups of U-shaped plates 52 and the guide rods 55 limit the moving direction of the connecting rod 53, stability of a plate during bending is improved, and the plate is prevented from being skewed during bending.
Although embodiments of the present utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.
Claims (10)
1. The utility model provides a bender is used in switch board production, includes workstation (1), its characterized in that: two groups of auxiliary guide mechanisms (4) are symmetrically arranged on the upper surface of the workbench (1), a limiting mechanism (5) is arranged at one end of the upper surface of the workbench (1), a bending mechanism (6) is arranged at one end of the limiting mechanism (5), and a pushing mechanism (3) is arranged at the other end of the upper surface of the workbench (1);
the pushing mechanism (3) comprises a servo motor (31), a threaded rod (36) and a push plate (37) which are arranged at one end of the lower surface of the workbench (1), an installation hole for installing the threaded rod (36) is formed in the upper surface of the workbench (1), a rotating shaft (32) is connected to an output shaft of the servo motor (31) in a transmission mode, a driving wheel (33) is fixedly connected to one end of the rotating shaft (32), a driven wheel (35) is connected to one end of the rotating shaft (32) in a transmission mode through the installation hole in a transmission mode, the driving wheel (33) is connected with the driven wheel (35) in a transmission mode through a synchronous belt (34), and a movable block (38) for the threaded rod (36) to be in threaded connection is welded on the lower surface of the push plate (37) in the middle.
Stop gear (5) are including two sets of U template (52) of symmetry welding at workstation (1) upper surface and the locating plate (51) of welding in two sets of U template (52) upper end, guide arm (55) have all been welded at the both ends of locating plate (51) lower surface, and the lower extreme of two sets of guide arms (55) has all been slided and peg graft have connecting rod (53), the outside rotation cover of connecting rod (53) is equipped with spacing roller (54), two sets of the outside of guide arm (55) is all overlapped and is equipped with spring (56), and the lower extreme of spring (56) is inconsistent with the outside of connecting rod (53).
2. The bending machine for producing power distribution cabinets according to claim 1, wherein: the upper surface of the workbench (1) is symmetrically provided with two groups of sliding grooves (9) and two rows of reaming holes (10) by taking the mounting groove (8) as a symmetry axis, each row of reaming holes (10) is provided with a plurality of reaming holes, and the plurality of reaming holes (10) are arranged at equal intervals.
3. The bending machine for producing power distribution cabinets according to claim 2, wherein: both ends of the lower surface of the push plate (37) are welded with sliding blocks (39), the two groups of sliding blocks (39) are respectively and slidably connected with the two groups of sliding grooves (9), and the movable blocks (38) are slidably connected with the mounting grooves (8).
4. The bending machine for producing power distribution cabinets according to claim 2, wherein: the two sets of auxiliary guide mechanisms (4) comprise connecting plates (41) which are arranged in parallel with the workbench (1), a plurality of sets of through holes (42) are formed in the lower surface of each connecting plate (41), and guide rollers (43) are hinged in the plurality of sets of through holes (42).
5. The bending machine for producing power distribution cabinets according to claim 4, wherein: the guide rollers (43) of each auxiliary guide mechanism (4) are hinged with each row of reaming holes (10), and the distance between the two groups of connecting plates (41) is larger than the length of the push plate (37).
6. The bending machine for producing power distribution cabinets according to claim 1, wherein: the lower surface of workstation (1) is kept away from servo motor (31) one end and is seted up kerve (7), the transversal right triangle that personally submits of kerve (7) sets up, the lower surface welding of workstation (1) has support frame (2).
7. The bending machine for producing power distribution cabinets according to claim 1, wherein: the bending mechanism (6) comprises an extension plate (61) welded on one side of the positioning plate (51), an air cylinder (62) is mounted on the upper surface of the extension plate (61), a bending plate (65) is arranged under the extension plate (61) in parallel, and a plurality of groups of connecting cylinders (66) are welded on the upper surface of the bending plate (65).
8. The bending machine for producing power distribution cabinets according to claim 7, wherein: the hydraulic rod of cylinder (62) runs through extension board (61) and one of them a set of connecting cylinder (66) fixed connection, and two other sets of connecting cylinder (66) all fixedly connected with gag lever post (63), and two sets of gag lever post (63) upper ends all slide run through extension board (61), and the upper end of two sets of gag lever post (63) all welds stopper (64).
9. The bending machine for producing power distribution cabinets according to claim 8, wherein: one side of the extension plate (61) and one side of the workbench (1) are arranged on the same plane, the cross section of the bending plate (65) is arranged in a right trapezoid shape, and one end angle of the bending plate (65) and one side of the workbench (1) are arranged on the same plane.
10. The bending machine for producing power distribution cabinets according to claim 1, wherein: slide holes (531) for sliding insertion of the guide rods (55) are formed in the two ends of the outer side of the connecting rod (53), the two ends of the outer side of the connecting rod (53) are respectively connected with the inner sides of the two groups of U-shaped plates (52) in a sliding mode, and the outer side of the limiting roller (54) is abutted to the upper surface of the workbench (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322150065.1U CN220515183U (en) | 2023-08-10 | 2023-08-10 | Bending machine for power distribution cabinet production |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322150065.1U CN220515183U (en) | 2023-08-10 | 2023-08-10 | Bending machine for power distribution cabinet production |
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| Publication Number | Publication Date |
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| CN220515183U true CN220515183U (en) | 2024-02-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202322150065.1U Active CN220515183U (en) | 2023-08-10 | 2023-08-10 | Bending machine for power distribution cabinet production |
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| CN (1) | CN220515183U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117805456A (en) * | 2024-03-01 | 2024-04-02 | 山东双开电力设备有限公司 | Multifunctional power distribution cabinet electric variable measuring device and method |
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2023
- 2023-08-10 CN CN202322150065.1U patent/CN220515183U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117805456A (en) * | 2024-03-01 | 2024-04-02 | 山东双开电力设备有限公司 | Multifunctional power distribution cabinet electric variable measuring device and method |
| CN117805456B (en) * | 2024-03-01 | 2024-05-07 | 山东双开电力设备有限公司 | Multifunctional power distribution cabinet electric variable measuring device and method |
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