Partitioned direct-current MCC control cabinet convenient to maintain

Abstract

The invention relates to the technical field of MCC control cabinets, and discloses a partition type direct current MCC control cabinet convenient to maintain, which comprises a cabinet body and a mounting frame, a plurality of steel sleeves are fixedly mounted on the rear wall of the cabinet body, a plurality of fixed frames are fixedly mounted at the rear end of the mounting frame, and a clamping sleeve is further mounted on one side of each fixed frame. According to the partition type direct current MCC control cabinet convenient to maintain, the steel sleeve is matched with the fixed frame, the clamping sleeve is installed on one side of the fixed frame, the telescopic shaft bodies are symmetrically installed at the ends of the clamping sleeve, and the guide plate frames are symmetrically installed on the inner wall of the steel sleeve. A guide plate frame with one side being an inclined face and the other side being a right-angle face is installed on the inner wall of the steel sleeve, one-way locking and fixing of the installation frame in the cabinet body are achieved, the movable shaft body is matched with the arc-shaped groove body and the straight groove body to drive the clamping sleeve to rotate, the telescopic shaft body is separated from limiting of the right-angle face of the guide plate frame, and fixing of the installation frame is relieved.

Description

Technical Field

[0001] This invention relates to the field of MCC control cabinet technology, specifically to a partitioned DC MCC control cabinet that is easy to maintain. Background Technology

[0002] DC MCC control cabinets are widely used in industrial production, especially for powering and controlling multiple pump loads. These control cabinets are typically divided into multiple independent zones according to circuits, with each zone corresponding to one load (such as a pump). Each zone integrates components such as circuit breakers, contactors, relays, DC speed control modules, and terminal blocks. The main purpose of adopting a zoned structure is twofold: firstly, to physically isolate the electrical units of different circuits, facilitating fault diagnosis and independent maintenance, and preventing a fault in one circuit from affecting the normal operation of other circuits; secondly, the zoned design makes the cabinet layout more compact, saving installation space, and allowing for flexible addition or reduction of the number of zones according to actual load requirements. The electrical units of each zone are usually integrated on an independent mounting frame, which serves as the supporting base for the components and is typically fixed inside the MCC control cabinet housing. In actual maintenance work, maintenance personnel need to regularly inspect, test, repair, or replace the electrical units inside the cabinet. In the normal installation state, the modules inside the MCC cabinet are arranged closely together, with very small gaps between modules. The space between the sides of the modules and the cabinet side walls is also very limited. Many modules have auxiliary contacts, expansion modules, additional terminals, etc., installed on their sides. These components are completely obscured by adjacent modules or the cabinet side walls when the modules are normally installed. Therefore, when maintenance personnel need to inspect, test, or replace these side components, due to space constraints, they cannot reach into the gaps to touch the components. Even with tools, operation is difficult. Maintenance personnel can only operate cautiously in the narrow cabinet space, which is not only inefficient but also prone to safety hazards such as component damage, tool slippage, or accidental contact with live parts. Therefore, we propose a maintenance-friendly partitioned DC MCC control cabinet. Summary of the Invention

[0003] The purpose of this invention is to provide a partitioned DC MCC control cabinet that is easy to maintain, so as to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, the present invention provides the following technical solution: a partitioned DC MCC control cabinet that is easy to maintain, comprising a cabinet body with a door, a mounting frame installed inside the cabinet body, the mounting frame having a front end near the door and a rear end away from the door, multiple brackets fixedly installed inside the mounting frame, and each bracket being equipped with an electronic unit, multiple steel sleeves fixedly installed on the rear wall of the cabinet body, and multiple fixed frames corresponding one-to-one with the steel sleeves fixedly installed at the rear end of the mounting frame, wherein a snap-fit ​​sleeve rotatably connected to one side of the fixed frame is also installed, and telescopic shafts are symmetrically installed at the ends of the snap-fit ​​sleeves, and guide plate frames are symmetrically installed on the inner walls of the steel sleeves, with the guide plate frames located on the movement trajectory of the telescopic shafts. Multiple steel plate frames, each corresponding to a fixed frame, are fixedly installed on both sides of the mounting frame. The steel plate frames are located on one side of the fixed frame, and a movable plate frame that is slidably connected to the inner wall of the steel plate frame is installed inside the steel plate frame. A fixed sleeve is fixedly installed at one end of the steel plate frame near the front end of the mounting frame, and a rope winding roller that is rotatably connected to the inner wall of the fixed sleeve is installed inside the fixed sleeve. Rope A is wound on the rope winding roller, and one end of rope A is fixed to one end of the movable plate frame. A connecting part for driving the locking sleeve to rotate is provided inside the fixed frame. Rope B is provided between the other end of the movable plate frame and the connecting part. The angle of the locking sleeve is adjusted by driving the movement of the connecting part, so that the telescopic shaft on the locking sleeve moves away from the limit of the guide plate frame.

[0005] Preferably, the connecting part includes a movable shaft disposed inside the fixed frame and slidably connected to its inner wall. One end of the movable shaft is located inside the snap-fit ​​sleeve, and an arc-shaped groove and a straight groove communicating with the arc-shaped groove are provided on the outer wall of the movable shaft. One end of the rope B is fixed to the other end of the movable shaft, and a spring part is connected between the fixed frame and the other end of the movable shaft.

[0006] Preferably, the inner wall of the snap-fit ​​sleeve is equipped with ball bearings, and the ball bearings can slide within the arc-shaped groove and the straight groove; one side of the guide plate frame is an inclined surface, and the other side is a right-angled surface.

[0007] Preferably, a positioning block is fixedly installed inside the steel plate frame, and a roller mechanism that is rotatably connected to the positioning block is installed on the positioning block. Multiple guide rails corresponding to the steel plate frame are fixedly installed on the side wall of the cabinet. The roller mechanism is located inside the guide rail and can slide along the inner wall of the guide rail. L-shaped plate frames are fixedly installed at the top and bottom of the guide rail, and multiple snap-fit ​​holes are equidistantly arranged on each L-shaped plate frame.

[0008] Preferably, the positioning block is provided with a fixed plate frame at the top and bottom, and multiple steel clips are fixedly installed on the fixed plate frame. The multiple steel clips are slidably connected to the positioning block, and the snap-fit ​​holes are located on the movement trajectory of the steel clips. Multiple spring bodies sleeved on the steel clips are connected between the fixed plate frame and the positioning block. A circular iron block is also fixedly installed on one side of the fixed plate frame.

[0009] Preferably, bar magnets are symmetrically installed on the movable plate frame, and the circular iron block is located on the movement trajectory of the bar magnets. The magnetic poles of the bar magnets and the circular iron block are opposite, and a trapezoidal slider is fixedly installed on the movable plate frame.

[0010] Preferably, an injection sleeve and a piston rod bracket that are slidably connected to the inner wall of the injection sleeve are provided on the side of the positioning block near the cabinet door. One end of the piston rod bracket is close to the top of the guide rail. A guide shaft is also fixedly installed on the side of the positioning block near the cabinet door. The injection sleeve is installed on the guide shaft and slidably connected to it. A reset spring sleeved on the guide shaft is connected between the injection sleeve and the side wall of the positioning block.

[0011] Preferably, a pressure-bearing shaft is also fixedly installed on the injection sleeve, and the pressure-bearing shaft is located on the movement trajectory of the trapezoidal slider. An inclined panel is fixedly installed on the top of the guide rail, and the inclined panel is located on the movement trajectory of the piston rod frame. An oil guide pipe is also fixedly installed on the end of the injection sleeve away from the piston rod frame, and one end of the oil guide pipe is located inside the guide rail.

[0012] Preferably, a torsion spring body is connected between the inner wall of the fixed sleeve and one end of the rope winding roller, and a knob that is rotatably connected to the fixed sleeve is installed at the end of the fixed sleeve. The knob is fixedly connected to the other end of the rope winding roller, and the knob is fixed to the end of the fixed sleeve by multiple bolts.

[0013] Preferably, a frame is fixedly installed at the bottom of each bracket, and a rotating shaft is installed on the frame and rotatably connected to both ends thereto. A meshing gear is fixedly installed at one end of the rotating shaft, and a winding drum is fixedly installed on the rotating shaft. The wire harness of the electronic unit is wound on the winding drum, and multiple gear rows corresponding to the frame are also fixedly installed on the side wall of the cabinet. The meshing gear and the gear rows are in a meshing state.

[0014] Compared with the prior art, the beneficial effects of the present invention are: 1. This invention uses a steel sleeve to cooperate with a fixed frame. A snap-fit ​​sleeve is installed on one side of the fixed frame, and telescopic shafts are symmetrically installed at the ends of the snap-fit ​​sleeves. A guide plate frame with one side inclined and the other side right angle is installed on the inner wall of the steel sleeve. This realizes the one-way locking and fixing of the installation frame in the cabinet. The moving shaft cooperates with the arc-shaped groove and the straight groove to drive the snap-fit ​​sleeve to rotate, so that the telescopic shaft is disengaged from the right angle limit of the guide plate frame, thereby releasing the fixing of the installation frame. At the same time, the bar magnet on the moving plate frame attracts the circular iron block, which drives the steel snap-fit ​​shaft to disengage from the snap-fit ​​hole, realizing the multi-level unlocking and arbitrary position pull-out function of the installation frame. Furthermore, the trapezoidal slider cooperates with the pressure shaft to drive the injection sleeve to spray lubricating oil into the guide rail, realizing the automatic lubrication effect during the movement of the installation frame. 2. This invention achieves automatic winding and unwinding of the wire harness during the movement of the mounting frame by fixing the frame at the bottom of each bracket. Under the action of the rotating shaft, meshing gears, winding drum, and toothed rack, the winding drum releases the wire harness and keeps it in a slack state when the mounting frame moves outward, and winds up the wire harness and neatly puts it back in place when the mounting frame moves inward. This effectively avoids the wire harness from being pulled and damaged on the terminals due to straightening. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the installation frame structure of the present invention; Figure 3 This is a schematic diagram of the cabinet and mounting frame structure of the present invention; Figure 4 This is a schematic diagram of the steel sleeve and snap-fit ​​sleeve structure of the present invention; Figure 5 This is a schematic diagram showing the separation of the steel sleeve and snap-fit ​​sleeve structures of the present invention; Figure 6 This is a schematic diagram showing the separation of the steel sleeve, snap-fit ​​sleeve, movable shaft, and fixed frame structure of the present invention; Figure 7 This is a schematic diagram of the guide rail, steel plate frame, and fixing frame structure of the present invention; Figure 8 This is a schematic diagram of the guide rail and positioning block structure of the present invention; Figure 9 This is a schematic diagram of the steel plate frame and guide rail structure of the present invention; Figure 10 This is a schematic diagram of the guide rail structure of the present invention; Figure 11 This is a schematic diagram of the internal structure of the steel plate frame of the present invention; Figure 12 This is a schematic diagram showing the separation of the positioning block and the injection sleeve structure of the present invention; Figure 13 This is a schematic diagram of the internal structure of the fixing sleeve of the present invention; Figure 14 This is a schematic diagram showing the separation of the fixing sleeve and knob structure of the present invention; Figure 15 This is a schematic diagram of the cabinet sidewall structure of the present invention; Figure 16 This is a schematic diagram of the support and frame structure of the present invention; Figure 17 This is a schematic diagram of the bottom structure of the mounting frame of the present invention.

[0016] In the diagram: 1. Cabinet; 2. Cabinet door; 3. Mounting frame; 31. Bracket; 32. Electronic unit; 33. Frame; 34. Shaft; 35. Meshing gear; 36. Winding drum; 4. Steel sleeve; 41. Guide plate frame; 5. Fixed frame; 51. Snap-fit ​​sleeve; 52. Telescopic shaft; 53. Ball bearing; 6. Steel plate frame; 61. Moving plate frame; 62. Fixed sleeve; 63. Winding roller; 64. Rope A; 65. Rope B; 66. Bar magnet; 67. Trapezoidal slider; 68. Torsion spring body; 69. Knob; 60. Bolt; 7. Connection 71. Moving shaft; 72. Arc-shaped groove; 73. Straight groove; 74. Spring; 8. Positioning block; 81. Roller mechanism; 82. Fixed plate frame; 83. Steel retaining shaft; 84. Spring body; 85. Circular iron block; 86. Guide shaft; 87. Return spring; 9. Guide slide rail; 91. L-shaped plate frame; 92. Snap-fit ​​hole; 93. Inclined panel; 10. Injection sleeve; 101. Piston rod frame; 102. Pressure-bearing shaft; 103. Oil guide pipe; 11. Gear rack; 12. Buffer wheel; 13. Torsion spring mechanism; 14. Spring mechanism. Detailed Implementation

[0017] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0018] Please see Figure 1-17This invention provides a technical solution: a partitioned DC MCC control cabinet that is easy to maintain, including a cabinet body 1 with a cabinet door 2, and an installation frame 3 installed inside the cabinet body 1. The installation frame 3 has a front end near the cabinet door 2 and a rear end away from the cabinet door 2. Similarly, the inner wall of the cabinet body 1 away from the cabinet door 2 is the rear wall. Multiple brackets 31 are fixedly installed inside the installation frame 3, and each bracket 31 is equipped with an electronic unit 32. The installation frame 3 serves as a load-bearing base, and its internal brackets 31 are used to fix and install electronic units 32 such as circuit breakers, contactors, relays, DC speed control modules, and terminal blocks. This partitioned layout makes each circuit independent, which facilitates subsequent fault diagnosis and maintenance operations. At the bottom of each bracket 31, a frame 33 is fixedly installed, and a rotating shaft 34 is mounted on the frame 33 and rotatably connected to its two ends. A meshing gear 35 is fixedly installed at one end of the rotating shaft 34, and a winding drum 36 is fixedly installed on the rotating shaft 34. The wires of the electronic units 32 are... The wire harness is wound on the reel 36. Multiple toothed racks 11, corresponding one-to-one with the frame 33, are also fixedly installed on the side wall of the cabinet 1. The meshing gear 35 engages with the toothed racks 11. Initially, the wire harness is wound on the reel 36 and is not taut, maintaining a moderate degree of slack to avoid pre-tightening the terminals. As the mounting frame 3 moves outward from the cabinet 1, the meshing gear 35 engages with the toothed racks 11, and the rotating shaft 34 drives the multiple reels 36 on it to rotate clockwise, gradually releasing the wire harness. This allows the wire harness to move outward synchronously with the mounting frame 3, always maintaining a slack state to prevent damage to the terminals from pulling forces. When the mounting frame 3 moves inward from the cabinet 1, the meshing gear 35 engages with the toothed racks 11 in the opposite direction, and the rotating shaft 34 drives the multiple reels 36 on it to rotate counterclockwise, gradually winding up the wire harness. This neatly positions the wire harness, preventing redundant wire harnesses from accumulating or tangling inside the cabinet, thus solving the problem of wire harness stress during the pulling process.

[0019] Multiple steel sleeves 4 are fixedly installed on the rear wall of the cabinet 1. Multiple fixed frames 5, each corresponding to a steel sleeve 4, are fixedly installed at the rear end of the mounting frame 3. A snap-fit ​​sleeve 51 is installed on one side of the fixed frame 5 and rotates therewith. Telescopic shafts 52 are symmetrically installed at the ends of the snap-fit ​​sleeves 51. Guide plate frames 41 are symmetrically installed on the inner wall of the steel sleeves 4. The guide plate frames 41 are located on the movement trajectory of the telescopic shafts 52. One side of the guide plate frames 41 is an inclined surface, and the other side is a right-angled surface. This structural design allows the telescopic shafts 52 to slide smoothly into the steel sleeves 4 through the inclined surface when entering, while it needs to overcome the obstruction of the right-angled surface when exiting, thus forming a one-way locking function to prevent the mounting frame 3 from accidentally coming off when not in operation.

[0020] The inner wall of the snap-fit ​​sleeve 51 is fitted with ball bearings 53. The fixed frame 5 has a connecting part 7 inside for driving the snap-fit ​​sleeve 51 to rotate. As a further limitation of this invention, the connecting part 7 includes a movable shaft 71 disposed inside the fixed frame 5 and slidably connected to its inner wall. One end of the movable shaft 71 is located inside the snap-fit ​​sleeve 51. The outer wall of the movable shaft 71 has an arc-shaped groove 72 and a straight groove 73 communicating with the arc-shaped groove 72. The ball bearings 53 on the inner wall of the snap-fit ​​sleeve 51 can slide within the arc-shaped groove 72 and the straight groove 73. A spring part 74 is connected between the fixed frame 5 and the other end of the movable shaft 71. This spring part 74 provides a restoring force for the movable shaft 71. Multiple steel plate frames 6, corresponding one-to-one with the fixed frame 5, are fixedly installed on both sides of the mounting frame 3. The steel plate frames 6 are located on one side of the fixed frame 5. The steel plate frame 6 has a movable plate frame 61 that is slidably connected to its inner wall. A fixed sleeve 62 is fixedly installed at one end of the steel plate frame 6 near the front end of the mounting frame 3. A rope winding roller 63 that is rotatably connected to the inner wall of the fixed sleeve 62 is installed inside the fixed sleeve 62. A rope A64 is wound on the rope winding roller 63. One end of the rope A64 is fixed to one end of the movable plate frame 61. The other end of the movable plate frame 61 is connected to the movable shaft 71 through a rope B65. The angle adjustment of the locking sleeve 51 is controlled by driving the movable shaft 71 to move, so that the telescopic shaft 52 on the locking sleeve 51 leaves the right angle limit of the guide plate frame 41. A spring mechanism 14 is also connected between the movable plate frame 61 and the steel plate frame 6. The spring mechanism 14 is in a stretched state when the movable plate frame 61 is pulled, providing a restoring force for the reverse movement of the movable plate frame 61.

[0021] A torsion spring body 68 is connected between the inner wall of the fixed sleeve 62 and one end of the rope winding roller 63. A knob 69 is installed at the end of the fixed sleeve 62 and rotated therewith. The knob 69 is fixedly connected to the other end of the rope winding roller 63. The knob 69 and the end of the fixed sleeve 62 are fixed by multiple bolts 60, so that maintenance personnel can drive the rope winding roller 63 to rotate by rotating the knob 69, thereby controlling the movement of the moving plate frame 61. The torsion spring body 68 accumulates elastic potential energy when the knob 69 rotates in the forward direction. After the knob 69 is released from fixation, it automatically drives the rope winding roller 63 to rotate in the reverse direction to reset.

[0022] A positioning block 8 is fixedly installed inside the steel frame 6. A roller mechanism 81 is mounted on the positioning block 8 and rotates thereon. Multiple guide rails 9, corresponding one-to-one with the steel frame 6, are fixedly installed on the side wall of the cabinet 1. The roller mechanism 81 is located inside the guide rail 9 and can slide along the inner wall of the guide rail 9. L-shaped frames 91 are fixedly installed on the top and bottom of the guide rail 9. Multiple snap-fit ​​holes 92 are equidistantly arranged on each L-shaped frame 91. Fixed frames 82 are provided on the top and bottom of the positioning block 8. Multiple steel snap-fit ​​shafts 83 are fixedly installed on the fixed frames 82. The multiple steel snap-fit ​​shafts 83 are slidably connected to the positioning block 8. The snap-fit ​​holes 92 are located on the movement of the steel snap-fit ​​shafts 83. On the moving trajectory, multiple spring bodies 84 sleeved on steel clips 83 are connected between the fixed plate frame 82 and the positioning block 8. A circular iron block 85 is also fixedly installed on one side of the fixed plate frame 82. A bar magnet 66 is symmetrically installed on the movable plate frame 61. The magnetic poles of the bar magnet 66 and the circular iron block 85 are opposite. When the bar magnet 66 moves to the corresponding position of the circular iron block 85, the two generate a mutual attraction force. It should be noted that the length of the bar magnet 66 is greater than the radius of the circular iron block 85. This design ensures that even if the movement distance of the movable plate frame 61 increases, the bar magnet 66 can still generate sufficient attraction force on the circular iron block 85, ensuring the reliability of the locking release.

[0023] A trapezoidal slider 67 is fixedly installed on the movable plate frame 61. The trapezoidal slider 67 has a right-angled trapezoidal cross-section. An injection sleeve 10 and a piston rod bracket 101 slidably connected to the inner wall of the injection sleeve 10 are provided on the side of the positioning block 8 near the cabinet door 2. One end of the piston rod bracket 101 is close to the top of the guide rail 9. A guide shaft 86 is also fixedly installed on the side of the positioning block 8 near the cabinet door 2. The injection sleeve 10 is installed on the guide shaft 86 and slidably connected to it. A return spring 87 sleeved on the guide shaft 86 is connected between the injection sleeve 10 and the side wall of the positioning block 8. A pressure-bearing shaft 102 is also fixedly installed on the 10. The pressure-bearing shaft 102 is located on the movement trajectory of the trapezoidal slider 67. An inclined panel 93 is fixedly installed on the top of the guide rail 9. The inclined panel 93 is located on the movement trajectory of the piston rod holder 101. An oil guide pipe 103 is also fixedly installed at the end of the injection sleeve 10 away from the piston rod holder 101. One end of the oil guide pipe 103 is located inside the guide rail 9. Thus, during the movement of the mounting frame 3, the lubricating oil can be accurately sprayed into the guide rail 9, reducing the friction between the roller mechanism 81 and the guide rail, and ensuring the stability of the movement of the mounting frame 3.

[0024] The bottom of the mounting frame 3 is equipped with multiple buffer wheels 12 that are rotatably connected to its bottom inner wall. The buffer wheels 12 are connected to the bottom inner wall of the frame by a torsion spring mechanism 13. When the mounting frame 3 slides outward from the cabinet 1, the buffer wheels 12 automatically unfold and contact the ground under the action of the torsion spring mechanism 13, providing auxiliary support for the mounting frame 3 and preventing swaying or tilting due to the excessive cantilever of the mounting frame 3. When the mounting frame 3 moves into the cabinet 1, the buffer wheels 12 are subjected to the force of the bottom of the cabinet 1 and adjust their angle, eventually embedding into the bottom of the mounting frame 3. The torsion spring mechanism 13 is in a deformation and storage state, ready for the next pull-out.

[0025] Furthermore, in the initial state, the mounting frame 3 is located inside the cabinet 1. At this time, the snap-fit ​​sleeve 51 is located inside the steel sleeve 4. The telescopic shaft 52 on the snap-fit ​​sleeve 51 contacts the right-angle surface of the guide plate frame 41, forming a one-way lock to prevent the mounting frame 3 from accidentally coming off. The ball bearings 53 on the inner wall of the snap-fit ​​sleeve 51 are located in the arc-shaped groove 72 and at the end of the arc-shaped groove 72 away from the straight groove 73. The steel snap-fit ​​shaft 83 enters part of the snap-fit ​​holes 92 on the L-shaped plate frame 91, fixing the multiple connections between the plate frame 82 and the positioning block 8. The spring body 84, which is sleeved on the steel retaining shaft 83, is in a normal state, holding the steel retaining shaft 83 within the retaining hole 92, thereby fixing the mounting frame 3 in the current position. The torsion spring body 68, which is connected between the inner wall of the fixing sleeve 62 and one end of the winding roller 63, is in a normal state and is not in a deformable and stored state. The bar magnet 66 on the movable plate frame 61 has not moved to the corresponding position of the circular iron block 85. The wire harness of the electronic unit 32 is wound on the winding drum 36, in an orderly state, and remains moderately loose, without exerting tension on the terminals.

[0026] Specifically, when the staff opens the cabinet door 2 to prepare for maintenance, if the electronic unit 32 to be maintained is inconvenient to observe or operate, the mounting frame 3 can be removed from the cabinet 1. The specific operation is as follows: First, rotate the bolt 60 to release the fixation between the knob 69 and the end of the fixed sleeve 62. Then, rotate the knob 69 one turn in the forward direction. The knob 69 drives the rope roller 63 to rotate. The torsion spring body 68 is in a deformation and storage state. The rope roller 63 rotates in the forward direction and pulls the rope A64. The rope A64 drives the movable plate frame 61 to move towards the cabinet door 2 in the steel plate frame 6. During this process, the spring mechanism 14 connecting the movable plate frame 61 and the steel plate frame 6 is in a stretched state, accumulating elastic potential energy for subsequent reset. The movable plate frame 61 drives the movable shaft 71 to slide within the inner wall of the fixed frame 5 via the rope B65. During the movement, the movable shaft 71 compresses the spring part 74, putting the spring part 74 in a compressed state. When the ball 53 moves to the intersection of the arc-shaped groove 72 and the straight groove 73, the telescopic shaft 52 has rotated away from the guide plate frame 41. At this time, the telescopic shaft 52 is no longer obstructed by the right angle surface of the guide plate frame 41, thus releasing part of the lock for the subsequent pulling out of the installation frame 3. During the movement of the movable shaft 71, the movable plate frame 61 is in a synchronous state of motion. When the intersection of the arc-shaped groove 72 and the straight groove 73 on the movable shaft 71 contacts the ball 53 inside the snap-fit ​​sleeve 51, the bar magnet 66 on the movable plate frame 61 moves to the corresponding position of the circular iron block 85, and the trapezoidal slider 67 moves to the end of the pressure shaft 102. The cross-section of the trapezoidal slider 67 is a right-angled trapezoid, and its lowest point moves to the end of the pressure shaft 102. The bar magnet 66 has opposite magnetic poles to the circular iron block 85. The bar magnet 66 generates an attractive force on the circular iron block 85, causing the fixed plate frame 82 to drive the steel clamp shaft 83 to move toward the bar magnet 66. The multiple spring bodies 84 connected between the fixed plate frame 82 and the positioning block 8 and sleeved on the steel clamp shaft 83 are in a stretched state. The steel clamp shaft 83 leaves the clamping hole 92. At this time, all movement restrictions on the mounting frame 3 are released, and the mounting frame 3 can move freely. Then, use bolt 60 to lock knob 69, fix the rope winding roller 63 in the current position, and then pull the mounting frame 3. The roller mechanism 81 slides within the guide rail 9, and the mounting frame 3 moves outward smoothly. At this time, there is a certain distance between the bottom of the mounting frame 3 and the ground. However, as the mounting frame 3 continues to move outward, the buffer wheel 12 automatically unfolds and contacts the ground under the action of the torsion spring mechanism 13, providing an additional support point for the mounting frame 3 and preventing the mounting frame 3 from swaying due to excessive cantilever length. During the outward movement of the mounting frame 3, the meshing gear 35 meshes with the gear rack 11, and the rotating shaft 34 drives the multiple winding drums 36 on it to rotate forward, gradually releasing the wire harness, so that the wire harness moves outward synchronously with the mounting frame 3, always maintaining a slack state, and avoiding damage to the terminal block caused by the pulling force on the wire harness.

[0027] During maintenance, in order to ensure the smooth movement of the mounting frame 3, it is necessary to regularly apply lubricating oil to the roller mechanism 81 and the guide rail. After several maintenances, the operator can turn the knob 69 one and a half turns clockwise. At this time, the movement distance of the moving plate frame 61 increases. It should be noted that since the length of the bar magnet 66 is greater than the radius of the circular iron block 85, even if the movement distance of the moving plate frame 61 increases, the bar magnet 66 still exerts an attractive force on the circular iron block 85. The steel clamp shaft 83 remains outside the clamping hole 92. At this time, the ball 53 is located in the straight groove 73, the clamping sleeve 51 maintains the angle after rotation, and the telescopic shaft 52 is always away from the right angle surface of the guide plate frame 41. The inclined surface of the trapezoidal slider 67 applies a force to the end of the pressure shaft 102, causing the injection sleeve 10 to slide at the upper limit of the guide shaft 86. The return spring 87 between the injection sleeve 10 and the side wall of the positioning block 8 is in a stretched state. The piston rod holder 101 at the end of the injection sleeve 10 is located at one end of the inclined panel 93, which is furthest from the end of the injection sleeve 10. As the mounting frame 3 moves outward from the cabinet 1, the surface of the inclined panel 93 applies a force to the end of the piston rod holder 101, causing the piston rod holder 101 to move inward from the injection sleeve 10, squeezing the lubricating oil inside the injection sleeve 10. The lubricating oil is then sprayed into the guide rail 9 through the oil guide pipe 103. The roller mechanism 81 contacts the lubricating oil during the limited sliding process within the guide rail 9, and the lubricating oil is evenly coated on the surface of the guide rail 9. As the roller mechanism 81 moves, the guide rail 9 is continuously coated with lubricating oil, effectively reducing friction and wear.

[0028] After the mounting frame 3 is moved to the designated position, the staff can choose to partially expose the mounting frame 3 to the outside of the cabinet 1 or pull out the entire mounting frame 3 according to maintenance needs. If only the components on the front or side of the module need to be inspected, the mounting frame 3 can be pulled out to the partially exposed position. At this time, the staff can obtain a larger operating space than in the normal installation state, making it easier to access the obscured auxiliary contacts, expansion modules, and additional wiring terminals. If a part of the mounting frame 3 is exposed to the outside of the cabinet 1, the staff needs to fix the mounting frame 3 in that position. The specific operation is as follows: release the bolt 60 from the knob 69. Under the action of the spring mechanism 14 connecting the movable plate frame 61 and the steel plate frame 6, the movable plate frame 61 moves in the opposite direction, moving towards the inside of the cabinet 1. The rope roller 63 rotates in the opposite direction under the action of the torsion spring body 68, and the rope A64 and rope B65 are retracted accordingly. During the reverse movement of the movable plate frame 61, the bar magnet 66 on it moves away from the corresponding position of the circular iron block 85 and no longer exerts force on the circular iron block 85. Due to the attraction force, the trapezoidal slider 67 moves away from the pressure shaft 102, and the injection sleeve 10 moves back under the action of the stretched return spring 87. The end of the piston rod 101 moves away from the inclined panel 93 and is no longer subject to the force of the inclined panel 93. The fixed plate frame 82 moves in the opposite direction under the action of the stretched spring body 84, driving the steel retaining shaft 83 to move towards the retaining hole 92. If the axis of the steel retaining shaft 83 does not coincide with the axis of the retaining hole 92, the operator can slightly pull the mounting frame 3 outward. Adjust the position of the steel retaining shaft 83 so that its axis coincides with the axis of the retaining hole 92. Under the action of the spring body 84, the steel retaining shaft 83 smoothly enters the retaining hole 92. The retaining hole 92 limits the steel retaining shaft 83, and the mounting frame 3 is firmly fixed in this position. At the same time, the moving shaft 71 moves in the opposite direction under the action of the compressed spring part 74. The arc-shaped groove 72 applies force to the ball 53, driving the retaining sleeve 51 to rotate in the opposite direction, so that the telescopic shaft 52 on the retaining sleeve 51 returns to the initial position.

[0029] When deep repair or complete replacement of the module is required, the staff can pull out the entire mounting frame 3. In the fully pulled-out state, the buffer wheel 12 is fully extended and stably supported on the ground. Together with the support at the bottom of the cabinet 1, it keeps the mounting frame 3 horizontal and stable, which makes it easy for the staff to operate the wiring terminals and nameplate parameters at the rear of the module. It also makes it easy to replace the entire module. During the outward movement of the mounting frame 3, the cable reel 36 continuously releases the wire harness, ensuring that the wire harness is always in a slack state and will not generate additional tension on the wiring terminals due to the increase in the pulling distance. After maintenance, the staff needs to push the mounting frame 3 back into the cabinet, first replenishing the lubricating oil inside the injection sleeve 10 for use in the next maintenance, then turning the knob 69 clockwise one turn. At this time, since the guide rail 9 has been lubricated, it is not necessary to turn it one and a half turns. Repeat the above unlocking operation, the steel retaining shaft 83 disengages from the retaining hole 92, the movement restriction of the mounting frame 3 is released, and after the mounting frame 3 is fully pushed into the cabinet 1, the bolt 60 is released from fixing the knob 69. Under the action of the spring mechanism 14 and the torsion spring body 68, all components automatically reset. During the inward movement of the mounting frame 3, the meshing gear 35 and the gear teeth... When the 11-row engages in reverse, the rotating shaft 34 drives the multiple winding drums 36 on it to rotate in reverse, gradually winding up the wire harness and neatly placing the wire harness in place, avoiding the accumulation or tangling of redundant wire harnesses in the cabinet. The telescopic shaft 52 on the snap-fit ​​sleeve 51 returns to its initial position and is again constrained by the right-angle surface of the guide plate frame 41. The steel snap-fit ​​shaft 83 enters the corresponding snap-fit ​​hole 92, and the mounting frame 3 is fixed in the normal working position. During the pushing of the mounting frame 3, the buffer wheel 12 is subjected to the force of the bottom of the cabinet 1 and adjusts its angle, finally embedding into the bottom of the mounting frame 3. The torsion spring mechanism 13 is in a deformation and storage state, ready for the next pull-out.

[0030] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0031] Although embodiments of the invention 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 to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A partitioned DC MCC control cabinet that is easy to maintain, characterized in that, The system includes a cabinet (1) with a cabinet door (2) installed inside the cabinet (1), an installation frame (3) installed inside the cabinet (1), the installation frame (3) having a front end near the cabinet door (2) and a rear end away from the cabinet door (2), multiple brackets (31) fixedly installed inside the installation frame (3), and each bracket (31) is equipped with an electronic unit (32), multiple steel sleeves (4) fixedly installed on the rear wall of the cabinet (1), and multiple fixed frames (5) corresponding to the steel sleeves (4) fixedly installed at the rear end of the installation frame (3), wherein a snap-fit ​​sleeve (51) rotatably connected to one side of the fixed frame (5) is also installed, and a telescopic shaft (52) is symmetrically installed at the end of the snap-fit ​​sleeve (51), a guide plate frame (41) is symmetrically installed on the inner wall of the steel sleeve (4), and the guide plate frame (41) is located on the movement trajectory of the telescopic shaft (52), and multiple fixed frames corresponding to the fixed frames (5) are fixedly installed on both sides of the installation frame (3). The corresponding steel plate frame (6) is located on one side of the fixed frame (5), and a movable plate frame (61) is installed inside the steel plate frame (6) and slidably connected to its inner wall. A fixed sleeve (62) is fixedly installed at one end of the steel plate frame (6) near the front end of the mounting frame (3), and a rope roller (63) is installed inside the fixed sleeve (62) and rotatably connected to its inner wall. Rope A (64) is wound on the rope roller (63), and one end of rope A (64) is fixed to one end of the movable plate frame (61). A connecting part (7) for driving the locking sleeve (51) to rotate is provided inside the fixed frame (5). Rope B (65) is provided between the other end of the movable plate frame (61) and the connecting part (7). The angle of the locking sleeve (51) is adjusted by controlling the movement of the driving connecting part (7), so that the telescopic shaft (52) on the locking sleeve (51) leaves the limit of the guide plate frame (41).

2. The easily maintained partitioned DC MCC control cabinet according to claim 1, characterized in that: The connecting part (7) includes a movable shaft (71) disposed inside the fixed frame (5) and slidably connected to its inner wall. One end of the movable shaft (71) is located inside the snap sleeve (51), and an arc-shaped groove (72) and a straight groove (73) communicating with the arc-shaped groove (72) are provided on the outer wall of the movable shaft (71). One end of the rope B (65) is fixed to the other end of the movable shaft (71), and a spring part (74) is connected between the fixed frame (5) and the other end of the movable shaft (71).

3. The easily maintained partitioned DC MCC control cabinet according to claim 2, characterized in that: The inner wall of the snap sleeve (51) is equipped with ball bearings (53), and the ball bearings (53) can slide within the arc groove (72) and the straight groove (73); one side of the guide plate frame (41) is an inclined surface and the other side is a right angle surface.

4. The easily maintained partitioned DC MCC control cabinet according to claim 1, characterized in that: A positioning block (8) is fixedly installed inside the steel plate frame (6), and a roller mechanism (81) that is rotatably connected to the positioning block (8) is installed on the positioning block (8). Multiple guide rails (9) corresponding to the steel plate frame (6) are fixedly installed on the side wall of the cabinet (1). The roller mechanism (81) is located inside the guide rail (9) and can slide along the inner wall of the guide rail (9). L-shaped plate frames (91) are fixedly installed at the top and bottom of the guide rail (9). Multiple snap-fit ​​holes (92) are equidistantly arranged on each L-shaped plate frame (91).

5. A partitioned DC MCC control cabinet for easy maintenance according to claim 4, characterized in that: The positioning block (8) is provided with a fixed plate frame (82) at the top and bottom, and multiple steel clips (83) are fixedly installed on the fixed plate frame (82). The multiple steel clips (83) are slidably connected to the positioning block (8), and the snap hole (92) is located on the movement trajectory of the steel clip (83). Multiple spring bodies (84) sleeved on the steel clips (83) are connected between the fixed plate frame (82) and the positioning block (8). A round iron block (85) is also fixedly installed on one side of the fixed plate frame (82).

6. A partitioned DC MCC control cabinet for easy maintenance according to claim 5, characterized in that: A bar magnet (66) is symmetrically installed on the movable plate frame (61), and a circular iron block (85) is located on the movement trajectory of the bar magnet (66). The magnetic poles of the bar magnet (66) and the circular iron block (85) are opposite, and a trapezoidal slider (67) is fixedly installed on the movable plate frame (61).

7. A partitioned DC MCC control cabinet for easy maintenance according to claim 6, characterized in that: The positioning block (8) is provided with an injection sleeve (10) and a piston rod bracket (101) that is slidably connected to the inner wall of the injection sleeve (10) on the side near the cabinet door (2). One end of the piston rod bracket (101) is close to the top of the guide rail (9). The positioning block (8) is also fixedly installed with a guide shaft (86) on the side near the cabinet door (2). The injection sleeve (10) is installed on the guide shaft (86) and slidably connected to it. A reset spring (87) sleeved on the guide shaft (86) is connected between the injection sleeve (10) and the side wall of the positioning block (8).

8. A partitioned DC MCC control cabinet for easy maintenance according to claim 7, characterized in that: A pressure-bearing shaft (102) is also fixedly installed on the injection sleeve (10). The pressure-bearing shaft (102) is located on the movement trajectory of the trapezoidal slider (67). An inclined panel (93) is fixedly installed on the top of the guide rail (9). The inclined panel (93) is located on the movement trajectory of the piston rod frame (101). An oil guide pipe (103) is also fixedly installed on the end of the injection sleeve (10) away from the piston rod frame (101). One end of the oil guide pipe (103) is located inside the guide rail (9).

9. A partitioned DC MCC control cabinet for easy maintenance according to claim 1, characterized in that: A torsion spring body (68) is connected between the inner wall of the fixed sleeve (62) and one end of the rope winding roller (63), and a knob (69) is installed at the end of the fixed sleeve (62) and rotated therewith. The knob (69) is fixedly connected to the other end of the rope winding roller (63), and the knob (69) is fixed to the end of the fixed sleeve (62) by multiple bolts (60).

10. A partitioned DC MCC control cabinet for easy maintenance according to claim 1, characterized in that: A frame (33) is fixedly installed at the bottom of each bracket (31). A rotating shaft (34) is installed on the frame (33) and rotatably connected to both ends thereto. A meshing gear (35) is fixedly installed at one end of the rotating shaft (34). A winding drum (36) is fixedly installed on the rotating shaft (34). The wire harness of the electronic unit (32) is wound on the winding drum (36). Multiple toothed rows (11) corresponding to the frame (33) are also fixedly installed on the side wall of the cabinet (1). The meshing gear (35) and the toothed rows (11) are in a meshing state.

Images