Interlocking mechanism of movable drawer unit and movable drawer unit

Abstract

The invention relates to the technical field of low-voltage switch cabinets, in particular to an interlocking mechanism of a movable drawer unit and the movable drawer unit. The interlocking mechanism comprises a position interlocking mechanism, the position interlocking mechanism comprises a position interlocking driving plate and a movable part position locking plate, the movable part position locking plate is located on the back face of the movable drawer unit, and the movable part position locking plate and the movable part are fixed; and the position interlocking driving plate is embedded into a corresponding position positioning opening in the movable part position locking plate through a positioning piece for position positioning. The fixed part and the movable part of the movable drawer unit are interlocked through the interlocking mechanism. The beneficial effects are that the interlocking mechanism is complete in function, low in structure cost, small in space occupation, and can realize unit miniaturization; the T-shaped sliding columns and the guide rails are adopted for pushing, guiding and limiting, the requirement for machining precision of sheet metal parts is lowered, cost is reduced, pushing faults are solved, upwarp of the rear portion of a movable part is controlled, and the inner width of a unit is increased.

Description

Technical Field

[0001] The invention relates to the technical field of low-voltage switch cabinets, in particular to an interlocking mechanism of a movable drawer unit and the movable drawer unit. Background Art

[0002] MS, GCS, and GCK drawer units (hereinafter collectively referred to as economical drawer units) are low-voltage switchgear devices that are mainstream for terminal power consumption. Economical drawer units move within the unit compartment during three-position operation. When the drawer unit is in the detached or test position, a certain distance is maintained between the unit door and the cabinet body. Only when the drawer unit is in the connected position does the unit door adhere tightly to the cabinet body, achieving IP40 operational protection. The position interlock mechanism of the economical drawer unit works in conjunction with positioning fixtures within the unit compartment to maintain the unit's position.

[0003] The difference between a removable drawer unit and an economical drawer unit is that a removable drawer unit consists of two parts: a fixed portion and a removable portion, such as the removable drawer units described in the applicant's Chinese patent applications 200410064770.9 and 200920037161.2. The fixed portion includes a propulsion screw and a position interlocking mechanism, a position display mechanism, a closing interlocking mechanism, and a unit locking mechanism. The removable portion is equipped with a nut that cooperates with the propulsion screw. The fixed portion and the removable portion are connected together so that they can move forward and backward. The propulsion screw on the fixed portion cooperates with the nut to push the removable portion forward and backward relative to the fixed portion. The position interlocking mechanism locks the propulsion screw by inserting the head end of the position locking plate into the splined shaft sleeve of the propulsion screw.

[0004] However, the existing movable drawer unit has the following technical defects:

[0005] 1. The structure of the position interlocking mechanism is complex, and the position interlocking mechanism and its matching position display mechanism and closing interlocking mechanism occupy a large width of the interlocking mechanism space on the left side of the push screw of the fixed part, making it impossible to achieve a cabinet width of 500m.

[0006] The reason is that the position interlocking mechanism uses a position locking plate that cooperates with the notch of the position locking rod to lock the position. The position locking plate is located on the left side of the propulsion screw, and the head of the position locking plate is inserted into the splined shaft sleeve of the propulsion screw to lock the propulsion screw. The position display mechanism cooperates with the position locking rod to display the position, and the position display mechanism is located in front of the position locking rod. All these factors lead to the complex structure of the position interlocking mechanism.

[0007] In addition, the position locking rod connected to the movable part is arranged on the left side of the pushing screw, and the pushing screw is arranged in the middle position of the fixed part, and its position cannot be changed, dividing the space of the fixed part into the left side space of the fixed part and the right side space of the fixed part. The separation position positioning notch on the position locking rod is located at the rear relative to other position positioning notches, so the position locking plate can only be set at the rear of the fixed part; at the same time, the position display mechanism cooperates with the head of the position locking rod through the position display arc component, and the position display arc component is pulled by the forward and backward movement of the position locking rod to display the position. Since the position locking rod is on the left side of the pushing screw, the position display arc component can only be on the left side of the pushing screw. The right side of the position display arc component also has a closing interlocking mechanism. The locking hole of the closing interlock rod is matched with the closing interlock rod, and the closing interlock rod needs to be set at a certain distance to the left of the push screw; all these result in the position interlocking mechanism and its matching position display mechanism and closing interlocking mechanism occupying a large width space of the interlocking mechanism space on the left side of the push screw of the fixed part, occupying about 40mm of the space on the left side of the fixed part. In addition, a unit locking mechanism needs to be set in the space on the left side of the fixed part. The minimum inner width of a unit with a cabinet width of 600mm is 505mm. The position interlocking mechanism, position display mechanism, closing interlocking mechanism and unit locking mechanism have already filled up the space on the left side of the fixed part, while the inner width of a unit with a cabinet width of 500mm is only 414mm, so only a cabinet width of 600mm can be achieved, but a cabinet width of 500mm cannot be achieved.

[0008] 2. The position interlocking mechanism locks the propulsion screw by inserting the head of the position locking plate into the spline sleeve of the propulsion screw. Because the spline groove of the spline sleeve is a V-shaped groove, there is always a large gap between the head of the position locking plate and the spline sleeve. In addition, the spline sleeve is usually made of powder metallurgy, which has high hardness but low structural strength. In the event of improper operation, if the force is too strong, the spline sleeve may burst. In this case, the manual propulsion mechanism must be replaced. Due to the complex structure, on-site operators cannot replace it and can only return it to the factory for repair.

[0009] 3. The closing interlocking mechanism matched with the position interlocking mechanism occupies a large portion of the unit height, and the minimum unit height can only be 200mm.

[0010] The reason is: the position interlock mechanism occupies 30mm of the unit room height, and the closing interlock mechanism is fixed on the 30mm upper surface of the unit fixed part, with a minimum height of 82mm, which cannot be reduced. Because the opening and closing stroke of the closing interlock mechanism arm also occupies height, the unit height of 200mm cannot be changed, and the unit height of 150mm cannot be achieved.

[0011] 4. There is a propulsion failure in the removable drawer unit, and the mechanical life of the propulsion screw rod and nut is short.

[0012] The reason is that the fixed part of the movable drawer unit has outer beams on both sides, and the outer beams are L-shaped and provided with slide grooves. The movable part has a screed plate and an L-shaped inner beam, and the movable part is slidably connected to the slide grooves on the outer beam through the slide column on the inner beam. The movable part is manually advanced by pushing the screw rod and nut respectively installed on the fixed part and the movable part. The movable drawer unit is guided and limited by the rollers or steel shafts on the side of the outer beam of the fixed part and the guide rails on both sides of the unit chamber.

[0013] The clearance between the push rod and the nut is only 0.3mm, and there is also a corresponding clearance between the sliding post of the movable part and the outer beam of the fixed part. Theoretically, the upper and lower clearance between the two can be designed to be 0.3mm. However, in actual production, the front and back flatness of the outer beam is difficult to achieve due to sheet metal bending. Even when processed with a dedicated mold, the upper and lower clearance between the sliding post of the movable part and the slide groove of the outer beam is often greater than 0.5mm. When the push rod is manually cranked to advance the movable part to the connection position, the main circuit connector is plugged in and resistance is generated. In particular, the plugging pressure of the 630A main circuit connector is 1500N to 1800N. The plugging resistance is generated instantly, causing the overall upward tilt of the rear of the movable part to exceed 0.5mm, causing the clearance between the rollers and guide rails on both sides of the unit to disappear, resulting in extrusion. The fit clearance between the push screw and the nut is only 0.3mm, but the overall upward tilt of the rear part of the movable part is greater than 0.3mm, which will cause the push screw and the nut to be damaged due to extrusion, making the mechanical life less than 500 times, which does not meet the standard.

[0014] 5. The maximum inner width of a unit with a cabinet width of 500mm is only 414mm. If the movable drawer unit is still pushed and guided by the rollers or steel shafts on the side of the outer beam of the fixed part and the guide rails on both sides of the unit room, the inner width of the unit will be smaller and the inner width of 414mm cannot be achieved. If the inner width of the unit is less than 414mm, the feasibility of arranging the main and auxiliary circuit connectors at the rear of the movable part cannot be met.

[0015] 6. The structural cost of the movable drawer unit is higher than that of the economical drawer unit.

[0016] It is precisely because the existing movable drawer units have the above-mentioned technical defects that the market application of movable drawer units is very small.

[0017] However, when the removable drawer unit is closed, the door remains firmly attached to the cabinet, regardless of whether the unit is in the detached, test, or connected position. This provides high safety for unit operation and maintenance, which is highly appreciated by users, especially in special scenarios such as offshore vessels and offshore platforms. In data centers, where the number of electrical devices is large, users also appreciate the removable drawer unit.

[0018] If we can optimize the structure and reduce costs while maintaining high safety, as long as the costs drop, there will be a lot of demand from users in specific places.

[0019] In 2022, the applicant launched an economical drawer unit for power distribution circuits, achieving a cabinet width of 500mm, current ratings exceeding 630A and 400A, and a unit depth of 400mm. In 2023, the product was further miniaturized, achieving a unit depth of 350mm, a cabinet width of 500mm, and a cabinet depth of 800mm.

[0020] Miniaturization of units and switchgear can reduce the switchgear's footprint. Building on the successful implementation of economical drawer units with a width of 500mm, if removable drawer units were available with a width of 500mm and a unit height of 150mm, their application prospects would be even broader. Furthermore, removable drawer units utilize a movable portion that allows for three positions, with the three positions located within the unit. Therefore, the unit depth of removable drawer units is greater than that of economical drawer units. Summary of the Invention

[0021] The technical problem to be solved by the present invention is that the existing interlocking mechanism has a complex structure and occupies a large space, which is not conducive to the miniaturization of the unit and cannot be achieved in a cabinet width of 500mm.

[0022] The technical solution adopted by the present invention to solve the technical problem is: an interlocking mechanism of a movable drawer unit, including a position interlocking mechanism, the position interlocking mechanism including:

[0023] A position interlocking drive plate is swingably mounted on the fixed portion of the movable drawer unit and swings to one side under the action of the elastic member;

[0024] A movable portion position locking plate, used for cooperating with the position interlocking drive plate for position positioning, the movable portion position locking plate being located on the back of the movable drawer unit, the movable portion position locking plate being fixed to the movable portion and used for enabling the movable portion position locking plate to move forward and backward along with the movable portion, the movable portion position locking plate having a positioning guide surface, the positioning guide surface having position positioning openings arranged front to back;

[0025] Among them, the position interlocking drive plate has a positioning piece extending to the back of the fixed part and cooperating with the positioning guide surface. The position interlocking drive plate swings to one side under the action of the elastic piece, so as to make the positioning piece fit the positioning guide surface and embed into the corresponding position positioning port when the movable part moves back and forth into the corresponding position, thereby positioning the movable part.

[0026] In some embodiments, optionally, the position locking plate of the movable portion is connected to the fixed portion through a translatable connection structure so as to be movably forward and backward.

[0027] In some embodiments, optionally, the translatably movable connection structure is specifically a sliding groove type connection structure, which specifically includes a sliding groove and a sliding groove screw passing through the sliding groove for connection and installation.

[0028] In some embodiments, optionally, the positioning guide surface is located inside the movable portion position locking plate, the movable portion position locking plate has a position locking paving groove, and the positioning guide surface is a side surface of the position locking paving groove.

[0029] In some embodiments, optionally, the interlocking mechanism of the movable drawer unit also includes a position display mechanism, which is installed on the fixed part of the movable drawer unit. The position display mechanism has a position display drive plate, which is swingably installed on the fixed part of the movable drawer unit. The movable part position locking plate has a display guide groove, and the position display drive plate has a display drive component that cooperates with the display guide groove. The display drive component extends to the back side of the fixed part and is embedded in the display guide groove. During the process of the movable part moving back and forth into the corresponding position, the display guide groove drives the position display drive plate to swing through the display drive component. The swinging of the position display drive plate drives the position display plate of the position display mechanism to move for position display.

[0030] In some embodiments, optionally, the position interlock mechanism further comprises a push screw position locking plate driven by a position interlock driving plate, the head end of the push screw position locking plate is inserted into a position locking notch on the side of the front end of the push screw to lock the position of the push screw, the push screw position locking plate and the position interlock driving plate are mounted on a mounting base plate, and are mounted on a fixed part of the movable drawer unit through the mounting base plate, the front of the mounting base plate has a locking plate fixing bracket protruding from the mounting base plate, the push screw position locking plate can be mounted on the locking plate fixing bracket by a translatable connecting structure, the locking plate fixing bracket and the push screw position locking plate can be installed on the locking plate fixing bracket by a translatable connecting structure The upper end of the locking plate is provided with a closing interlocking slot, which is used to cooperate with the closing interlocking mechanism to perform closing interlocking. When the pushing screw position locking plate locks the pushing screw, the closing interlocking slots on the locking plate fixing bracket and the pushing screw position locking plate coincide with each other; the interlocking mechanism also includes a closing interlocking mechanism, which is installed in the fixed part of the movable drawer unit. The closing interlocking mechanism has a closing interlocking locking plate that moves up and down under the drive of the opening and closing shaft rod. The closing interlocking locking plate locks the position interlocking mechanism and the pushing screw by embedding the locking plate fixing bracket and the closing interlocking slots on the pushing screw position locking plate.

[0031] A movable drawer unit comprises a fixed part and a movable part, wherein the fixed part and the movable part are interlocked by the interlocking mechanism of the movable drawer unit.

[0032] In some embodiments, optionally, there is a translatable connection structure between the fixed part and the movable part, which is used to connect the fixed part and the movable part together so that they can be translated back and forth. The bottom of the movable part has a T-shaped sliding column, which is used to cooperate with the guide rail hook in the unit room to perform propulsion guide limiting.

[0033] In some embodiments, optionally, the translatably movable connection structure between the fixed portion and the movable portion is located on the left and right sides of the movable drawer unit.

[0034] In some embodiments, optionally, the fixed part includes a propulsion interlocking substrate and slide brackets on both sides of the propulsion interlocking substrate, the propulsion interlocking substrate is used for the installation of the propulsion screw rod and the position interlocking mechanism, the slide brackets on both sides also extend to both sides of the movable part respectively, the translatable connection structure between the fixed part and the movable part is respectively located on the slide bracket and the movable part, the translatable connection structure between the fixed part and the movable part is specifically a slide-type connection structure, the slide-type connection structure specifically includes a slide and a slide screw passing through the slide for connection and installation, the slide is located on the side of the slide bracket, the slide screw passes through the slide to connect the slide bracket and the movable part together so that it can be translated back and forth;

[0035] Alternatively, the slide groove is located on the side of the movable part, and the slide groove screw passes through the slide groove to connect the slide groove bracket and the movable part together so that they can move forward and backward in translation.

[0036] In some embodiments, optionally, the advancing screw is mounted on the advancing interlocking substrate through a screw mounting seat, the movable part is provided with a nut that cooperates with the advancing screw to push the movable part forward and backward, the nut is mounted on the movable part through the nut mounting seat, and a balancing pressure plate is provided on the screw mounting seat and the nut mounting seat for advancing the advancing screw to guide and limit the advancing screw, one end of the balancing pressure plate is fixedly connected to the nut mounting seat, and the other end of the balancing pressure plate is connected to the screw mounting seat through a translatable connection structure so as to be movably connected forward and backward, and the translatable connection structure between the balancing pressure plate and the screw mounting seat is specifically a slide groove type connection structure;

[0037] Alternatively, one end of the balancing pressure plate is fixedly connected to the screw rod mounting seat, and the other end of the balancing pressure plate is connected to the nut mounting seat so as to be movably moved forward and backward through a translatable connection structure. The translatable connection structure between the balancing pressure plate and the nut mounting seat is specifically a sliding groove type connection structure.

[0038] In some embodiments, optionally, a position display mechanism and a unit locking mechanism are also installed on the propulsion interlock substrate, and an upper cover is installed on the propulsion interlock substrate, the upper cover covers the position interlock mechanism, the position display mechanism and the unit locking mechanism, and the closing interlock mechanism is installed on the upper cover.

[0039] In some embodiments, optionally, the movable part includes a base plate, which is divided into two parts, a front screed plate and a rear base plate, respectively. The screed plate is used for installing the nut, and the movable part can be connected to the fixed part through the screed plate and can be translated forward and backward.

[0040] The beneficial effects of the present invention are as follows: the design of the movable part position locking plate being arranged on the back of the unit reduces the overall dimensions of the position interlocking mechanism and the space occupied by the left side of the fixed part. The space occupied by the position display mechanism and the closing interlocking mechanism coordinated therewith is also small, so that a cabinet width of 500mm can be realized, and correspondingly, a cabinet width of 600mm can also be realized synchronously. The minimum unit height can be reduced to 150mm. The movable drawer unit of the cabinet with a width of 500mm can save copper on the horizontal busbar of the cabinet body. For example, a horizontal busbar of 2500A can save 5.22kg of copper.

[0041] The movable part position locking plate is connected to the bottom surface of the fixed part through a sliding groove connection structure, which further balances the movable part and the fixed part, so that the position interlocking mechanism and the position display mechanism can move flexibly and without obstruction during the three-position movement of the movable part.

[0042] The interlocking mechanism of the present invention has perfect functions, simplified structure and reduced costs;

[0043] In the prior art, the unit's advancement and positioning are guided by guide rails and rollers, as well as the sliding posts of the movable part and the sliding grooves on the outer beams of the fixed part. However, the present invention uses the T-shaped sliding posts of the movable part to cooperate with the guide rails of the unit chamber to guide and position the unit. The unit's advancement is balanced front and back, left and right, and the non-extrusion structure effectively controls unit advancement failures.

[0044] In addition, the fit clearance between the fixed part and the movable part is no longer related to the advancement limit, is no longer subject to force, and no longer requires control of the fit clearance, which simplifies the unit structure, reduces the processing accuracy requirements of the sheet metal parts, reduces costs, and reduces the amount of steel plates used;

[0045] At the same time, the present invention adopts the T-shaped sliding column of the movable part to cooperate with the guide hook of the unit room to push the guide limit, which can expand the inner width of the unit, so that the inner width of the movable drawer unit with a cabinet width of 500mm can reach a maximum of 414mm;

[0046] The movable drawer unit structure of the present invention requires the supplier to only provide the unit split assembly consisting of the fixed part and the silk motherboard, without providing the rear end of the movable part, thereby reducing procurement costs and reducing transportation and packaging costs;

[0047] Combined with the above advantages, the movable drawer unit of the present invention can achieve a cabinet width of 500mm, the unit advancement failure rate will be basically eliminated, and the comprehensive application cost is similar to the total cost of the economical drawer unit currently used in the market, which is at least 20% lower than the application cost of the existing movable drawer unit. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] The present invention will be further described below with reference to the accompanying drawings and examples;

[0049] Figure 1 It is a first-perspective stereoscopic view of the position interlocking mechanism;

[0050] Figure 2 is a second perspective perspective diagram of the position interlocking mechanism;

[0051] Figure 3 is a third-perspective perspective diagram of the position interlocking mechanism;

[0052] Figure 4 It is a front view schematic diagram of the interlocking mechanism in the separated position and in the interlocked state;

[0053] Figure 5 It is a back view schematic diagram of the interlocking mechanism in the separated position and in an interlocked state;

[0054] Figure 6 It is a side view schematic diagram of the interlocking mechanism in the separated position and in an interlocked state;

[0055] Figure 7 is a perspective view of the interlocking mechanism in the separated position and in an interlocked state;

[0056] Figure 8 It is a front view schematic diagram of the interlocking mechanism in the unlocked state at the separation position;

[0057] Figure 9 It is a schematic diagram of the back side of the interlocking mechanism in the unlocked state in the separation position;

[0058] Figure 10 It is a schematic diagram of the back side of the interlocking mechanism in the test position in the interlocking state;

[0059] Figure 11 It is a side view schematic diagram of the interlocking mechanism in the test position in the interlocking state;

[0060] Figure 12 It is a schematic diagram of the back side of the interlocking mechanism in the connected position and in an interlocked state;

[0061] Figure 13 It is a side view schematic diagram of the interlocking mechanism in the connected position and in an interlocked state;

[0062] Figure 14It is a structural diagram of the fixed part;

[0063] Figure 15 A schematic diagram of the structure of the silk motherboard with fixed and movable parts;

[0064] Figure 16 For Figure 15 Structural diagram of adding a nut mounting seat and a balancing pressure plate on the basis of the invention;

[0065] Figure 17 For Figure 16 Structural diagram of adding upper cover and travel switch on the basis of

[0066] Figure 18 For Figure 17 Structural diagram of adding a rear base plate on the basis of

[0067] Figure 19 This is a schematic diagram of the structure from a front perspective showing the closing coupling mechanism and the position interlocking mechanism in an unlocked state;

[0068] Figure 20 It is a structural schematic diagram of the closing coupling mechanism and the position interlocking mechanism in the unlocked state from a rear-view perspective;

[0069] Figure 21 This is a schematic diagram of the structure from a front perspective showing the closing coupling mechanism and the position interlocking mechanism in an interlocked state;

[0070] Figure 22 It is a structural schematic diagram from a rear-view perspective of the closing coupling mechanism and the position interlocking mechanism in an interlocked state;

[0071] Figure 23 This is a schematic diagram of the unit room's door-opening state structure;

[0072] Figure 24 Schematic diagram of the structure of the unit room in the closed state;

[0073] Figure 25 Schematic diagram of the overall structure of the movable drawer unit;

[0074] Figure 26 is a perspective view of the unit locking mechanism;

[0075] Figure 27 It is a structural schematic diagram of the locking unit of the unit locking mechanism in the separated position;

[0076] Figure 28 It is a structural diagram of the unlocking unit of the locking mechanism of the unit in the separation position;

[0077] Figure 29 It is a structural diagram of the locking unit of the locking mechanism of the unit in the connection and test positions;

[0078] Figure 30 It is a structural diagram of the emergency unlocking unit of the locking mechanism of the connection and test positions;

[0079] Figure 31 is a structural schematic diagram of the movable drawer unit assembly in the separated position;

[0080] Figure 32 is a structural schematic diagram of the movable drawer unit assembly in the test position;

[0081] Figure 33 is a structural schematic diagram of the movable drawer unit assembly in the connected position;

[0082] Figure 34 This is a schematic diagram of the structure of a 250A removable drawer unit for a power distribution circuit with a cabinet width of 600mm, a unit depth of 450mm, and a unit height of 150mm;

[0083] Figure 35 This is a schematic diagram of the structure of a 250A removable drawer unit for a power distribution circuit with a cabinet width of 600mm, a unit depth of 450mm, and a unit height of 200mm;

[0084] Figure 36 This is a schematic diagram of the structure of a 400A and 630A removable drawer unit for a power distribution circuit with a cabinet width of 600mm, a unit depth of 450mm, and a unit height of 400mm;

[0085] Figure 37 This is a schematic diagram of the structure of a 250A removable drawer unit for a power distribution circuit with a cabinet width of 500mm, a unit depth of 450mm, and a unit height of 150mm;

[0086] Figure 38 This is a structural diagram of a 250A removable drawer unit for a power distribution circuit with a cabinet width of 500mm, a unit depth of 450mm, and a unit height of 200mm;

[0087] Figure 39 This is a schematic diagram of the structure of a 400A and 630A removable drawer unit for a power distribution circuit with a cabinet width of 500mm, a unit depth of 450mm, and a unit height of 400mm;

[0088] Figure 40 This is a schematic diagram of the structure of a switch cabinet with movable drawer units of 150mm, 200mm, 300mm and 400mm heights;

[0089] In the figure, 1. Position interlock drive plate, 2. Movable position locking plate, 3. Slide, 4. Slide screw, 5. Position lock yielding groove, 6. Position display drive plate, 7. Position display plate, 8. Display guide groove, 9. Push screw position locking plate, 10. Push screw, 11. Position locking notch, 12. Mounting base plate, 13. Closing interlock notch, 14. Closing interlock locking plate, 14-1. Closing lock plate, 14-2. Closing plugging plate, 15. T-type slide column, 1 6. Unit chamber, 16-1. Unit chamber rear plate, 17. Guide rail, 18. Push interlock base plate, 19. Slide bracket, 20. Screw rod mounting seat, 21. Screw nut, 22. Screw nut mounting seat, 23. Balance pressure plate, 24. Upper cover, 25. Side plate, 26. Unit rear plate, 27. Screw nut plate, 28. Rear bottom plate, 29. Main circuit connector, 30. Auxiliary circuit connector, 31. Operating shaft sleeve, 32. Position operation unlocking plate, 33. Torsion spring, 34. Positioning shaft, 3 5. Fixed shaft, 36. Travel switch pressing head, 37. Travel switch, 38. Position display base, 39. Display drive shaft, 40. Closing interlock fixing bracket, 41. Closing interlock traction plate, 41-1. Arc traction slide, 42. Hand crank operation hole, 43. Opening and closing shaft rod, 43-1. Telescopic shaft sleeve, 43-2. Limit shaft sleeve, 43-3. Handle side shaft rod, 43-4. Switch side shaft rod, 44. Connection position positioning port, 45. Test position positioning port, 4 6. Separation position positioning hole, 47. Mounting base, 48. Handle, 49. Unlocking pressure plate, 50. Unit locking plate, 51. Compression spring, 52. Bottom plate locking notch, 53. Instrument panel, 54. Circuit breaker, 55. Hook plate, 56. Unit door, 57. Operation panel, 57-1. Rocker handle access hole, 57-2. Position display window, 57-3. Position unlocking button, 57-4. Blocking plate, 58. Switch opening and closing handle, 59. Door interlock unlocking hole, 60. Door lock. DETAILED DESCRIPTION

[0090] In order to solve the technical problems existing in the prior art and provide feasibility for the realization of a movable drawer unit with a cabinet width of 500mm and a unit height of 150mm, the following considerations are made: the fixed part and the movable part of the movable drawer unit cannot be changed, and the maximum unit inner width of the movable drawer unit with a cabinet width of 500mm is only 414mm. If the existing position interlocking mechanism and the position display mechanism matched therewith are used, the left side space of the fixed part can no longer meet the spatial arrangement feasibility of the unit locking mechanism of the fixed part, resulting in the inability to realize a movable drawer unit with a cabinet width of 500mm. Therefore, it is necessary to provide a position interlocking mechanism, the outer dimensions of which are reduced, and the space occupied by the position interlocking mechanism and the position display mechanism matched therewith on the fixed left side space is reduced, so as to meet the arrangement of the unit locking mechanism.

[0091] In addition, the structure of the existing position interlocking mechanism is very complex, occupying a height of 30 mm, and the minimum occupied height of the closing interlocking mechanism matched with the position interlocking mechanism is 82 mm, which cannot be reduced. The opening and closing stroke of the crank arm of the closing interlocking mechanism also occupies height, and the unit height of 200 mm cannot be changed, and the unit height of 150 mm cannot be achieved.

[0092] Furthermore, the maximum internal width of a unit in a 500mm cabinet is only 414mm. If the movable drawer unit is still guided and limited by rollers or steel shafts on the side of the fixed part's outer beam and the two side rails inside the unit, the unit's internal width will be even smaller, and the 414mm internal width of the unit cannot be achieved. If the unit's internal width is less than 414mm, the feasibility of arranging the main and auxiliary circuit connectors at the rear of the movable part cannot be met. Furthermore, the existing push-guide limit structure places too high a demand on the sheet metal components of the movable drawer unit, especially the sheet metal processing precision of the outer beam, failing to meet the design requirements, resulting in push failures. Therefore, a new push-guide limit structure is needed.

[0093] Therefore, the position interlocking mechanism needs to be innovatively designed to simplify the structural design and reduce costs; and the space occupied by the position interlocking mechanism, position display mechanism, and closing interlocking mechanism should be reduced to provide feasibility for the realization of a cabinet width of 500mm and a unit height of 150mm. At the same time, the structure of the movable part positioned by the outer beam should be changed to solve the design problem of propulsion failure.

[0094] Based on the above considerations, the main invention contents of the present invention are:

[0095] 1. The movable portion of the position interlock mechanism, the position locking plate 2, is located on the back of the unit. The movable portion has a positioning guide surface and a position positioning opening. The movable portion also has a display guide slot 8 for position display. The movable portion is connected to the fixed portion via a translatable connection structure, allowing for forward and backward translation. This design reduces the overall length of the position interlock mechanism and the space occupied by the left side of the fixed portion. Furthermore, the space occupied by the position display mechanism and closing interlock mechanism is also small, making a cabinet width of 500mm feasible. Given a 500mm cabinet width, a cabinet width of 600mm is also feasible.

[0096] 2. The position interlocking mechanism synchronously locks the push screw 10 of the movable part and the hand-cranked push mechanism. The push screw position locking plate 9 of the position interlocking mechanism is located in front of the fixed part, so that this unit can be equipped with a closing interlocking mechanism that takes up little space. While achieving a cabinet width of 500mm, the minimum unit height can be achieved to 150mm.

[0097] 3. The outer beam of the fixed part is eliminated, and the movable drawer unit uses a T-shaped slide column 15 and a guide rail 17 in the unit chamber 16 to hook and guide the advancement. This can simplify the unit structure, reduce the processing accuracy requirements of sheet metal parts, reduce costs, reduce the amount of steel plates used, solve the advancement failure, and control the upward warping of the rear part of the movable part. After the movable drawer unit is locked in the unit chamber 16, the T-shaped slide column 15 on the movable part is hooked with the guide rail 17, and the advancement limit gap of the movable part is made smaller. The advancement balance is completely determined within 0.25mm~0.4mm and does not change, so that the defect of the advancement screw rod 10 and the nut 21 being damaged due to extrusion is eliminated. The fitting clearance of the movable connection structure between the fixed part and the movable part is no longer related to the advancement limit, is no longer subjected to force, and no longer needs to control the fitting clearance. Correspondingly, the processing accuracy requirements of the sheet metal parts are reduced.

[0098] 4. After the outer beam of the fixed part is eliminated, the parts of the movable drawer unit that need to be processed with a special mold to ensure the processing accuracy are only the sheet metal parts of the fixed part and the threaded motherboard 27 of the movable part. After the bottom plate of the movable part is divided into the threaded motherboard 27 and the rear bottom plate 28, the applicant, as the supplier of the switch cabinet equipment manufacturing factory, only needs to provide the switch cabinet equipment manufacturing factory with the following parts: Figure 20 The unit split assembly shown is sufficient, and the switch cabinet equipment manufacturing factory can process other parts by itself, so that the cost of users purchasing switch cabinet equipment from the switch cabinet equipment manufacturing factory is reduced.

[0099] A specific embodiment of the present invention is described in detail below.

[0100] like Figures 1 to 13 As shown, an interlocking mechanism of a movable drawer unit includes a position interlocking mechanism, which includes:

[0101] A position interlocking drive plate 1 is mounted on the fixed portion of the movable drawer unit so as to be swingable left and right, and is swung to one side under the action of an elastic member;

[0102] The movable part position locking plate 2 is used to cooperate with the position interlocking drive plate 1 for position positioning. The movable part position locking plate 2 is located on the back of the movable drawer unit. The movable part position locking plate 2 is fixed to the movable part and is used to enable the movable part position locking plate 2 to move forward and backward with the movable part. The movable part position locking plate 2 has a positioning guide surface, and the positioning guide surface has position positioning openings arranged front and back. Specifically, the rear end of the movable part position locking plate 2 is fixed to the movable part by self-tapping screws;

[0103] Among them, the position interlocking drive plate 1 has a positioning piece extending to the back of the fixed part and cooperating with the positioning guide surface. The position interlocking drive plate 1 swings to one side under the action of the elastic member, so as to make the positioning piece fit the positioning guide surface and embed into the corresponding position positioning port when the movable part moves back and forth into the corresponding position, thereby positioning the movable part.

[0104] The movable portion position locking plate 2 is connected to the fixed portion through a translatable connection structure so as to be translatable forward and backward.

[0105] The translatable connection structure is specifically a sliding groove type connection structure, which specifically includes a sliding groove 3 and a sliding groove screw 4 that passes through the sliding groove 3 for connection and installation. Specifically, the sliding groove 3 and the sliding groove screw 4 are respectively located on the movable part position locking plate 2 and the fixed part.

[0106] In this embodiment, the positioning guide surface is located inside the movable portion position locking plate 2 , the movable portion position locking plate 2 has a position locking yielding groove 5 , and the positioning guide surface is a side surface of the position locking yielding groove 5 .

[0107] The interlocking mechanism of the movable drawer unit also includes a position display mechanism, which is installed on the fixed part of the movable drawer unit. The position display mechanism has a position display drive plate 6, which is swingably installed on the fixed part of the movable drawer unit. The movable part position locking plate 2 has a display guide groove 8, and the position display drive plate 6 has a display drive component that cooperates with the display guide groove 8. The display drive component extends to the back of the fixed part and is embedded in the display guide groove 8. During the process of the movable part moving back and forth into the corresponding position, the display guide groove 8 drives the position display drive plate 6 to swing left and right through the display drive component. The swinging of the position display drive plate 6 drives the position display plate 7 of the position display mechanism to move for position display.

[0108] The position interlocking mechanism also has a push screw position locking plate 9 driven by the position interlocking driving plate 1. The head end of the push screw position locking plate 9 is inserted into the position locking slot 11 on the side of the front end of the push screw 10 to lock the position of the push screw 10. The push screw position locking plate 9 and the position interlocking driving plate 1 are installed on the mounting base plate 12 and are installed on the fixed part of the movable drawer unit through the mounting base plate 12. The front part of the mounting base plate 12 has a locking plate fixing bracket protruding from the mounting base plate 12. The push screw position locking plate 9 can be installed on the locking plate fixing bracket by a translatable connection structure. The upper ends of the locking plate fixing bracket and the push screw position locking plate 9 both have a closing interlocking slot 13. When the push screw position locking plate 9 locks the position of the push screw 10, the closing interlocking slots 13 on the locking plate fixing bracket and the push screw position locking plate 9 coincide with each other.

[0109] The interlocking mechanism of the movable drawer unit also includes a closing interlocking mechanism, which is installed on the fixed part of the movable drawer unit. The closing interlocking mechanism has a closing interlocking locking plate 14 that moves up and down under the drive of the opening and closing shaft 43. The closing interlocking locking plate 14 locks the position interlocking mechanism and the pushing screw 10 by embedding the locking plate fixing bracket and the closing interlocking slot 13 on the pushing screw position locking plate 9.

[0110] like Figures 14-40 As shown, a movable drawer unit includes a fixed part and a movable part, and the fixed part and the movable part are interlocked by the interlocking mechanism of the movable drawer unit.

[0111] A translatable connection structure is provided between the fixed and movable sections, connecting them together for forward and backward translation. The bottom of the movable section has a T-shaped slide 15, which engages with a guide rail 17 within the unit chamber 16 to guide and limit the unit's advancement. The translatable connection structure between the fixed and movable sections is located on the left and right sides of the movable drawer unit.

[0112] Specifically, the fixed part includes a propulsion interlocking substrate 18 and a slide bracket 19 on both sides of the propulsion interlocking substrate 18. A propulsion screw 10 is installed on the fixed part. The propulsion interlocking substrate 18 is used for the installation of the propulsion screw 10 and the position interlocking mechanism. The slide brackets 19 on both sides also extend to both sides of the movable part respectively. The translatable connection structure between the fixed part and the movable part is located between the slide bracket 19 and the movable part. The translatable connection structure between the fixed part and the movable part is specifically a slide type connection structure. The slide type connection structure specifically includes a slide 3 and a slide screw 4 that passes through the slide 3 for connection and installation. The slide 3 is located on the side of the slide bracket 19. The slide screw 4 passes through the slide 3 and is screwed on the movable part to connect the slide bracket 19 and the movable part so that it can be translated back and forth. There are preferably at least two slide screws 4 of the translatable connection structure on each side.

[0113] Of course, it is not excluded that the chute 3 is located on the side of the movable part, and the chute screw 4 passes through the chute 3 and is screwed on the chute bracket 19 to connect the chute bracket 19 and the movable part together so that they can move forward and backward.

[0114] The fitting clearance between the advancing screw 10 and the nut 21 is designed to be 0.3mm, and the fitting clearance of the sliding groove connection structure between the fixed part of the sliding groove bracket 19 and the movable part is generally designed to be 0.25mm, which is smaller than the fitting clearance between the advancing screw 10 and the nut 21.

[0115] The advancing screw rod 10 is installed on the advancing interlocking base plate 18 through the screw rod mounting seat 20. The movable part is provided with a nut 21 that cooperates with the advancing screw rod 10 to push the movable part forward and backward. The nut 21 is installed on the movable part through the nut mounting seat 22. A balancing pressure plate 23 is provided on the screw rod mounting seat 20 and the nut mounting seat 22 for advancing the advancing screw rod 10 to guide and limit the advancement. One end of the balancing pressure plate 23 is fixedly connected to the nut mounting seat 22, and the other end of the balancing pressure plate 23 is connected to the screw rod mounting seat 20 through a translatable connection structure so that it can be translated back and forth. The translatable connection structure between the balancing pressure plate 23 and the screw rod mounting seat 20 is specifically a slide groove type connection structure, which specifically includes a slide groove 3 and a slide groove screw 4 that passes through the slide groove 3 for connection and installation.

[0116] Of course, it is not ruled out that one end of the balancing pressure plate 23 is fixedly connected to the screw rod mounting seat 20, and the other end of the balancing pressure plate 23 is connected to the nut mounting seat 22 through a translatable connection structure so as to be movably connected back and forth.

[0117] A position display mechanism and a unit locking mechanism are also installed on the propulsion interlock substrate 18. An upper cover plate 24 is installed on the propulsion interlock substrate 18. The upper cover plate 24 covers the position interlock mechanism, the position display mechanism and the unit locking mechanism. The closing interlock mechanism is installed on the upper cover plate 24.

[0118] The movable part includes a base plate, side plates 25 fixed on both sides of the base plate and a unit rear plate 26 fixed at the rear end of the base plate. The base plate is divided into two parts, a front wire motherboard 27 and a rear base plate 28. The wire motherboard 27 is used for installing the wire motherboard 21, and the unit rear plate 26 is used for installing the main circuit connector 29 and the auxiliary circuit connector 30. The movable part is connected to the fixed part through the wire motherboard 27 and can be moved forward and backward.

[0119] like Figures 31-39 As shown, a movable drawer unit assembly includes the above-mentioned movable drawer unit and a unit chamber 16.

[0120] The structures of the movable drawer unit and the movable drawer unit assembly of this embodiment are described in more detail below.

[0121] like Figure 4 As shown, the front end of the propulsion screw 10 has an operating sleeve 31, the side of the operating sleeve 31 is a position locking notch 11, the cross section of the position locking notch 11 is rectangular, and the front end of the operating sleeve 31 is a hand-cranked operating hole 42 that matches the crank handle.

[0122] The movable drawer unit and movable drawer unit assembly of this embodiment have three positions, namely, a separation position, a test position, and a connection position, so the position interlock mechanism is also a three-position interlock mechanism. Of course, the movable drawer unit can also be a two-position movable drawer unit, namely, a separation position and a connection position.

[0123] like Figures 1 to 3 As shown, the position interlocking mechanism specifically includes a mounting base 12, a position interlocking drive plate 1, a push screw position locking plate 9 and a position operation unlocking plate 32. The elastic member that drives the position interlocking drive plate 1 to swing to one side is a torsion spring 33. The positioning member on the position interlocking drive plate 1 and cooperating with the positioning guide surface is a positioning shaft 34. The position interlocking drive plate 1 is swingably mounted on the mounting base 12 through a fixed shaft 35. The torsion spring 33 is sleeved on the fixed shaft 35 to drive the position interlocking drive plate 1 to swing to one side. The front part of the mounting base 12 has a locking plate fixing bracket protruding from the mounting base 12. The push screw position locking plate 9 can be installed on the locking plate fixing bracket for translation left and right through a translatable connection structure. The upper ends of the locking plate fixing bracket and the push screw position locking plate 9 both have a closing interlocking slot 13. When the push screw position locking plate 9 locks the position of the push screw 10, the closing interlocking slots 13 on the locking plate fixing bracket and the push screw position locking plate 9 coincide with each other. The position interlock drive plate 1 has a forward-extending interlocking traction head for driving the push screw position lock plate 9 to translate left and right. The position operation unlocking plate 32 is mounted on the position interlock drive plate 1 and is used to drive the position interlock drive plate 1 to swing in the opposite direction against the force of the torsion spring 33. The position operation unlocking plate 32 has a travel switch pressing head 36 for pressing a travel switch 37. The positioning shaft 34 passes through the clearance slots on the mounting base plate 12 and the push interlock base plate 18 and enters the position lock clearance slot 5.

[0124] The position display mechanism specifically includes a position display drive plate 6, a position display plate 7, and a position display base 38. The position display plate 7 is disposed within the position display base 38 for horizontal translation and is fixed to the front end surface of the push-interlock base 18 via the position display base 38. The position display drive plate 6 is mounted on the mounting base 12 via another fixed shaft 35 for horizontal swinging. The display drive member on the position display drive plate 6 is specifically a display drive shaft 39. The display drive shaft 39 passes through the clearance grooves in the mounting base 12 and the push-interlock base 18 and enters the display guide groove 8.

[0125] like Figures 19-22As shown, the closing interlock mechanism specifically includes a closing interlock fixed bracket 40, a closing interlock traction plate 41 and a closing interlock locking plate 14. The closing interlock fixed bracket 40 is fixed on the upper cover plate 24 on the thrust interlock substrate 18. The closing interlock fixed bracket 40 has a closing and opening shaft rod through hole. The closing interlock traction plate 41 has a closing and opening shaft rod operating hole and an arc-shaped traction slide groove 41-1. The closing interlock locking plate 14 can be installed on the closing interlock fixed bracket 40 so as to move up and down. The closing interlock locking plate 14 has a closing lock plate 14-1 and a closing blocking hole plate 14-2. The opening and closing shaft rod 43 is a retractable opening and closing shaft rod, including a retractable shaft sleeve 43-1, a limit shaft sleeve 43-2, a handle side shaft rod 43-3 and a switch side shaft rod 43-4. The handle side shaft rod 43-3 is fixedly connected to the retractable shaft sleeve 43-1, and the front end of the switch side shaft rod 43-4 is inserted into the rear port of the retractable shaft sleeve 43-1, and they can be telescopically transmitted with each other. The handle side shaft 43-3 rotates right 90 degrees, the closing interlock locking plate 14 moves down, and the closing lock plate 14-1 is embedded in the closing interlock slot 13 on the locking plate fixing bracket and the push screw position locking plate 9 to perform closing interlocking. The push screw position locking plate 9 that is inserted into the position locking slot 11 to position lock the push screw 10 cannot move to the left, and the position interlocking mechanism cannot be unlocked. The closing blocking plate 14-2 completely blocks the hand-cranked operation hole 42 of the push screw 10, and the crank handle for operating the push screw 10 cannot be inserted into the hand-cranked operation hole 42 to perform the three-position operation of the unit. The handle side shaft 43-3 rotates left 90 degrees, the closing interlock locking plate 14 moves up, the closing lock plate 14-1 disengages from the closing interlock slot 13, and the closing interlock is released. The push screw position locking plate 9 can move freely, the position interlocking mechanism can be unlocked, and the closing blocking plate 14-2 moves up to expose the hand-cranked operation hole 42.

[0126] like Figure 5 As shown, the front and rear positioning openings on the positioning guide surface of the movable portion position locking plate 2 are, from front to back, a connection position positioning opening 44, a test position positioning opening 45, and a separation position positioning opening 46. The positioning shaft 34 is engaged with the separation position positioning opening 46 for separation position positioning, the positioning shaft 34 is engaged with the test position positioning opening 45 for test position positioning, and the positioning shaft 34 is engaged with the connection position positioning opening 44 for connection position positioning.

[0127] like Figure 14 、 15As shown in Figure 16, the propulsion screw 10 includes a front polished rod section and a rear screw section. The propulsion screw 10 is inserted into the screw mounting seat 20 through the polished rod section. The front and rear ends of the screw mounting seat 20 have copper sleeves for the installation of the polished rod section. The operating shaft sleeve 31 is sleeved on the head end of the polished rod section extending out of the screw mounting seat 20 and fixed by a fixing pin. The balancing pressure plate 23 is connected to the screw mounting seat 20 through two left and right sliding groove connection structures. The setting of the balancing pressure plate 23 enables the propulsion cooperation of the propulsion screw 10 and the nut 21 to have a higher balance in the left, right, up and down directions, which can reach ±0.3mm, ensuring that the friction between the propulsion screw 10 and the nut 21 is smaller when the propulsion is engaged, thereby reducing the damage to the propulsion screw 10 and the nut 21.

[0128] like Figure 26 As shown, the unit locking mechanism includes a mounting base 47 and a handle 48 mounted on the mounting base 47, an unlocking pressure plate 49, a unit locking plate 50 and a compression spring 51, and the unlocking pressure plate 49 is reset by the spring.

[0129] like Figure 27 As shown, the movable drawer unit is in the separated position, the unit locking mechanism is in the separated position locked state, the movable portion presses the unlocking pressure plate 49, and under the action of the compression spring 51, the locking head of the unit locking plate 50 is inserted into the locking notch 52 of the bottom plate of the unit chamber 16, thereby locking the movable drawer unit. By lifting the handle 48, the unit locking plate 50 is lifted up, and the locking head of the unit locking plate 50 is disengaged from the locking notch 52 of the bottom plate of the unit chamber 16, thereby unlocking the movable drawer unit. The movable drawer unit can be pulled out of the unit chamber 16, and the unit locking mechanism is in the separated position unlocked state, as shown. Figure 28 shown.

[0130] like Figure 29 As shown, the movable drawer unit is in the test and connection position, the unit locking mechanism is in the locked state, the movable part is disengaged from the unlocking pressure plate 49, the unlocking pressure plate 49 blocks the unit locking plate 50, the unit locking plate 50 cannot be lifted, and the movable drawer unit is in the locked state.

[0131] like Figure 30 As shown, the movable drawer unit is in the test and connection position, the unit locking mechanism is in the emergency unlocking state, the movable part is disengaged from the unlocking pressure plate 49, and the unlocking pressure plate 49 is pressed by a tool hand to disengage the unlocking pressure plate 49 from the obstruction of the unit locking plate 50, so that the unit locking plate 50 can be lifted by the handle 48, and the locking head of the unit locking plate 50 is disengaged from the bottom plate locking groove 52 of the unit chamber 16, thereby unlocking the movable drawer unit and allowing the movable drawer unit to be urgently pulled out of the unit chamber 16.

[0132] like Figure 18As shown, the bottom plate of the movable portion has a total of four T-shaped slide posts 15. Two of these T-shaped slide posts 15 are located on the left side of the bottom of the movable portion and are arranged front to back, for hooking with the guide rail 17 on the left side of the unit chamber 16. The other two T-shaped slide posts 15 are located on the right side of the bottom of the movable portion and are arranged front to back, for hooking with the guide rail 17 on the right side of the unit chamber 16. Specifically, two of these T-shaped slide posts 15 are fixed to the threaded motherboard 27, and two are fixed to the rear bottom plate 28. The threaded motherboard 27 and the rear bottom plate 28 are fixed to each other at the bent edges with self-tapping screws.

[0133] The upper cover plate 24 covering the push interlock substrate 18 is divided into two parts, the left upper cover plate 24 is installed with a travel switch 37, and the travel switch pressing head 36 on the position operation unlocking plate 32 extends upward from the upper cover plate 24 to cooperate with the travel switch 37 and press the travel switch 37. Figure 25 As shown, an instrument panel 53 is mounted on the right upper cover 24. The unit rear panel 26, the movable portion of the removable drawer unit, houses the main circuit dynamic plug-in for the incoming line, the main circuit dynamic plug-in for the outgoing line, the auxiliary circuit dynamic plug-in, and the intelligent data dynamic plug-in. A circuit breaker 54 is secured to the unit rear panel 26 via a fixing plate.

[0134] like Figure 23 As shown, the unit chamber 16 of the movable drawer unit has two left and right guide rails 17, two left and right bottom plate locking notches 52, and two left and right hook plates 55. The left and right hook plates 55 are used to mate with the hook plates 55 on the left and right sides of the bottom plate of the push-in interlocking base plate 18. The T-shaped slide 15 of the bottom plate of the movable drawer unit and the guide rail 17 are in a mate state in both the test position and the connection position. After the movable drawer unit is in the separated position, the movable drawer unit can be unlocked by lifting the handle 48 of the unit locking mechanism, and then the movable drawer unit can be pulled out of the unit chamber 16.

[0135] When the movable drawer unit is pulled out of the unit chamber 16, the T-shaped slide 15 is blocked by the front end sealing portion of the guide rail 17 to prevent it from falling. The movable drawer unit is slightly lifted up, and the T-shaped slide 15 escapes from the guide rail slide groove of the guide rail 17 through the slide entrance at the front end of the guide rail 17, and then crosses the front end sealing portion of the guide rail 17, and the movable drawer unit can be pulled out.

[0136] The hook fitting clearance between the T-shaped slide 15 and the guide rail 17 is designed to be 0.4mm, and the single-sided fitting clearance on both sides of the slide groove of the T-shaped slide 15 and the guide rail 17 is designed to be 0.25mm, so that the upper limit of the rear part of the movable part is only 0.4mm, and the upper limit of the front end of the movable part is only 0.3mm, which is the same as the fitting clearance of 0.3mm between the propulsion screw and the nut, so that the propulsion screw 10 and the nut 21 will not be damaged due to extrusion, the reliability is greatly improved, and the mechanical life reaches more than 1,000 times.

[0137] The rear of the unit room 16 is the unit room rear plate 16-1, which is used to install the main circuit static plug-in on the incoming line side, the main circuit static plug-in on the outgoing line side, the auxiliary circuit static plug-in, and the intelligent data static plug-in. The unit door 56 is fixed on the cabinet column.

[0138] like Figure 24 As shown, the unit door 56 is provided with an operation panel 57, a switch handle 58, a door interlock unlocking hole 59, and a door lock 60. The operation panel 57 includes a crank handle access hole 57-1, a position display window 57-2, a position unlocking button 57-3, and a hole blocking plate 57-4. The crank handle access hole 57-1 corresponds to the manual cranking operation hole 42 of the propulsion screw 10, the position display window 57-2 corresponds to the position display panel 7, the position unlocking button 57-3 corresponds to the position operation unlocking plate 32, and the hole blocking plate 57-4 can be moved left and right. Moving the hole blocking plate 57-4 leftward opens the crank handle access hole 57-1, while moving the hole blocking plate 57-4 rightward blocks the crank handle access hole 57-1. The switch handle 58 corresponds to the handle-side shaft 43-3.

[0139] The three-position operation process of this embodiment 1 is as follows:

[0140] Separation position: the movable drawer unit is inserted into the unit chamber 16, the T-shaped slide 15 enters the guide rail groove of the guide rail 17, the locking head of the unit locking plate 50 of the unit locking mechanism is inserted into the bottom plate locking groove 52 of the unit chamber 16, the movable drawer unit is locked, the movable part of the movable drawer unit is in the separation position, the positioning shaft 34 is stuck in the separation position positioning hole 46, and the separation position is positioned, the head end of the push screw position locking plate 9 is inserted into the position locking groove 11 on the side of the front end of the push screw 10, the push screw 10 is locked in position, the position display board 7 is in the separation display position, the position interlocking mechanism closes the unit door 56, the door lock 60 of the unit door 56 locks the cabinet column, and the position display board 7 displays "separation" through the position display window 57-2, as shown in FIG. Figure 4 、 5 , 6, 7 and 31.

[0141] Separate to the test position and push: insert the crank handle into the hand-crank operation hole 42 of the push screw 10 through the crank handle entry hole 57-1, press and hold the position unlock button 57-3, so that the position operation unlocking plate 32 drives the push screw position locking plate 9 to move leftward through the position interlocking drive plate 1, disengages from the position locking notch 11 of the push screw 10, and unlocks the push screw 10. At the same time, the positioning shaft 34 moves out of the separation position positioning hole 46, as shown in FIG. Figure 8 and 9As shown. The push screw 10 is shaken by the crank handle, and the push screw 10 cooperates with the nut 21 to push the movable part to move. When the movable part is pushed to the test position, the position interlocking drive plate 1 swings and resets under the action of the torsion spring 33, and the positioning shaft 34 is clamped into the test position positioning port 45 to perform test position positioning. The display guide groove 8 on the movable part position locking plate 2 drives the position display drive plate 6 to swing through the display drive shaft 39, and the swinging of the position display drive plate 6 drives the position display plate 7 to move. The position display plate 7 displays "test" through the position display window 57-2. The swinging reset of the position interlocking drive plate 1 also drives the push screw position locking plate 9 to move to the right, inserts the position locking notch 11 of the push screw 10, and locks the push screw 10. When the movable part is pushed to the test position, the auxiliary circuit dynamic plug-in on the movable part is connected with the auxiliary circuit static plug-in, as shown Figure 10 、 11 and 32.

[0142] Test to connect position: Insert the crank handle into the hand-crank operation hole 42 of the push screw 10 through the crank handle entry hole 57-1. Press and hold the position unlock button 57-3, causing the position operation unlocking plate 32 to drive the push screw position locking plate 9 to move leftward via the position interlock drive plate 1, disengaging the position locking notch 11 of the push screw 10 and unlocking the push screw 10. At the same time, the positioning shaft 34 moves out of the test position positioning hole 45. By shaking the push screw 10 with the crank handle, the push screw 10 cooperates with the nut 21 to push the movable part to move. When the movable part is pushed to the connection position, the position interlock drive plate 1 swings back to its original position under the action of the torsion spring 33, and the positioning shaft 34 is engaged in the connection position positioning port 44 to position the connection position. The display guide groove 8 on the movable part position locking plate 2 drives the position display drive plate 6 to swing through the display drive shaft 39. The swinging of the position display drive plate 6 drives the position display plate 7 to move. The position display plate 7 displays "connected" through the position display window 57-2. The swinging and resetting of the position interlock drive plate 1 also drives the push screw position locking plate 9 to move to the right, inserts the position locking notch 11 of the push screw 10, and locks the push screw 10. When the movable part is pushed to the connection position, the main circuit dynamic plug-in on the movable part is connected with the main circuit static plug-in, as shown in FIG. Figure 12 、 13 and 33.

[0143] Pulling out the movable drawer unit: Reverse the above steps to move the movable portion to the separated position. Then, by lifting the handle 48, the unit locking plate 50 is lifted, and the locking head of the unit locking plate 50 disengages the locking notch 52 on the bottom plate of the unit chamber 16, thereby unlocking the movable drawer unit and pulling it out of the unit chamber 16. In the event of a malfunction of the position interlocking mechanism and the hand-cranked propulsion mechanism, the unit locking mechanism can be operated for emergency unlocking, allowing the movable drawer unit to be pulled out of the unit chamber 16 in an emergency.

[0144] Figure 7 、 14 Figures 25, 31-33, and 37-39 are schematic diagrams of the structure of a 500mm wide movable drawer unit and its fixed and movable parts. As can be seen in the figure, the space on the left side of the fixed part is just enough to accommodate the position interlocking mechanism, position display mechanism, closing interlocking mechanism, and unit locking mechanism. Figures 34-36 , the synchronization of movable drawer units with a cabinet width of 600mm can also be achieved.

[0145] The advantages of this embodiment are:

[0146] The design of the movable part position locking plate 2 being arranged on the back of the unit reduces the external dimensions of the position interlocking mechanism and reduces the space occupied on the left side of the fixed part. The position display mechanism and closing interlocking mechanism that cooperate with it also occupy little space, so that a cabinet width of 500mm can be achieved, and correspondingly, a cabinet width of 600mm can also be achieved synchronously.

[0147] The position interlocking mechanism and the matching position display mechanism adopted by the movable drawer unit of the present invention have simpler structures and lower costs compared with the prior art.

[0148] The position interlocking mechanism and its associated position display mechanism of the present invention are fully functional, capable of simultaneously achieving three-position positioning, display, and propulsion interlocking. The present invention utilizes the position positioning openings on the position locking yielding groove 5 on the movable portion position locking plate 2 to cooperate with the positioning members on the position interlocking drive plate 1 to achieve three-position positioning of the movable portion. Simultaneously, the propulsion screw 10 is synchronously interlocked by the propulsion screw position locking plate 9 linked to the position interlocking drive plate 1. The three-position display is synchronously achieved by the display guide groove 8 on the movable portion position locking plate 2 cooperating with the position display drive plate 6 of the position display mechanism.

[0149] The movable part position locking plate 2 is connected to the bottom surface of the fixed part through a sliding groove connection structure, which further balances the movable part and the fixed part, so that the position interlocking mechanism and the position display mechanism can move flexibly and without obstruction during the three-position movement of the movable part.

[0150] The push screw position locking plate 9 of the position interlocking mechanism of the present invention is located in the front of the fixed part, so that the unit can be equipped with a closing interlocking mechanism with a simple structure and smaller space occupation, and finally a unit height of 150mm is achieved, which can realize 12 circuits of a switch cabinet equipment.

[0151] The fixed part of the present invention eliminates the outer beam, and the movable drawer unit uses a T-shaped sliding column 15 and a guide rail 17 in the unit chamber 16 to cooperate with the hook for advancement and guidance. The fitting clearance between the movable connection structure between the fixed part and the movable part is no longer related to the advancement limit, is no longer subjected to force, and no longer needs to control the fitting clearance, which simplifies the unit structure, reduces the processing accuracy requirements of sheet metal parts, reduces costs, and reduces the amount of steel plates used.

[0152] At the same time, this design solves the problem of advancement failure, and the upward tilt of the rear part of the movable part is controlled. After the movable drawer unit is locked in the unit chamber 16, the T-shaped slide column 15 on the movable part is hooked with the guide rail 17, so that the advancement limit gap of the movable part is smaller, and the advancement balance is completely determined within 0.25mm~0.4mm and does not change, so that the defect of the advancement screw rod 10 and the nut 21 being damaged due to extrusion is eliminated. Even for a 630A movable drawer unit with a main circuit connector 29 insertion pressure of 2500N, when the movable part is pushed to the connection position, the connection surface of the main circuit connector 29 can be 100% up to standard, the advancement mechanism will not be damaged, the reliability is greatly improved, the mechanical life is more than 1000 times, and the temperature rise of the main circuit connector 29 is guaranteed to be within 5k.

[0153] After the balancing pressure plate 23 is installed on the propulsion screw rod 10 and the nut 21 on the basis of the hook cooperation between the T-shaped slide column 15 and the guide rail 17 in the unit chamber 16, the reliability of the propulsion mechanism is further improved.

[0154] After the fixed part eliminates the outer beam, the parts of the movable drawer unit that need to be processed with a special mold to ensure the processing accuracy are only the sheet metal parts of the fixed part and the threaded motherboard 27 of the movable part. After the bottom plate of the movable part is divided into the threaded motherboard 27 and the rear bottom plate 28, the applicant, as a supplier to the switch cabinet equipment manufacturing factory, only needs to provide the switch cabinet equipment manufacturing factory with the following parts, including the interlocking mechanism. Figure 20 The unit split assembly shown is sufficient, and the switch cabinet equipment manufacturing factory can purchase and process other components by itself, so that the cost of users purchasing switch cabinet equipment from the switch cabinet equipment manufacturing factory is reduced.

[0155] The bottom of the movable part of the present invention is connected to the bottom plate of the unit chamber 16 through the T-shaped slide column 15 and the guide rail 17 for advancement and guidance limitation. This changes the existing technology in which the movable drawer unit is connected to the guide rails 17 on both sides of the unit chamber 16 through the outer rollers to achieve advancement and guidance limitation, thereby increasing the inner width of the unit. This meets the space requirement for arranging 32 secondary plug-ins in a movable drawer unit with a cabinet width of 600mm and a unit height of 150mm when used for a control circuit, and meets the space requirement for arranging secondary plug-ins and RJ45 communication plug-ins in a movable unit switch cabinet with a cabinet width of 500mm when used for a power distribution circuit and a control circuit.

[0156] The installation method of the propulsion screw position locking plate 9 of the position interlocking mechanism and the interlocking method of the position locking slot 11 inserted into the side of the propulsion screw 10 make the position interlocking mechanism have a large interlocking force on the propulsion screw 10. If it is not unlocked, the rocker handle cannot shake the propulsion screw 10 in the event of human error. Even if the rocker handle is deformed, the interlocking mechanism will not be damaged. In addition, when the closing interlock is in effect, the closing interlock locking plate 14 presses on the propulsion screw position locking plate 9, which can further reduce the risk of the propulsion screw position locking plate 9 being deformed by force.

[0157] The installation method of the propulsion screw rod 10 enables an unprofessional person to replace the propulsion screw rod 10 .

[0158] When the removable drawer unit is in the connected position, the position interlocking mechanism of the present invention positions the removable portion by cooperating with the position positioning openings on the position locking groove 5 on the removable portion position locking plate 2 and the positioning member on the position interlocking drive plate 1. Simultaneously, the push screw 10 is interlocked by the push screw position locking plate 9. Simultaneously, the locking heads of the unit locking plates 50 on either side of the fixed portion of the unit insert into the bottom plate locking notches 52 of the unit chamber 16, locking the removable drawer unit. This improves the unit's resistance to bumps and vibrations in the connected position, making it suitable for replacing fixed cabinets used on ships.

[0159] The miniaturized movable drawer unit of the present invention and the switch cabinet equipment adapted for the unit occupy a small area, and when in the separated position, the unit door 56 is in a closed state, and the unit door 56 is in close contact with the cabinet column, and the operation and maintenance safety level is high. Therefore, the miniaturized movable drawer unit of the present invention is generally used in narrow scenes, such as: subways, offshore platforms, data centers, high-rise buildings, ships, etc. and offshore platforms, to improve the equipment maintenance safety level, and of course it is also applicable to all scenes.

[0160] The comprehensive cost of the movable drawer unit of the present invention for power distribution circuits can be made equal to that of the economical drawer units currently used in the market.

[0161] By using a circuit breaker with no overlap of main circuit connectors, a 500mm-wide, seven-unit switchgear saves 6-8kg of copper in connecting busbars compared to existing technologies, depending on the current rating. A 2500A switchgear with a 500mm-wide cabinet saves 5.22kg of copper per unit in the horizontal busbar compared to a 600mm-wide switchgear.

[0162] Compared to the removable drawer unit disclosed in Chinese patent application 200920037161.2, the removable drawer unit of the present invention for power distribution circuits can achieve a unit depth of 450mm when the cabinet width is 600mm, while the prior art can only achieve a unit depth of 500mm. This reduces the steel plate usage per unit by 1.8kg. Calculated at a steel plate unit price of 6 yuan, the cost of steel plate usage is reduced by 10.8 yuan. The removable drawer unit of the present invention for power distribution circuits can also achieve a unit depth of 450mm when the cabinet width is 500mm. Compared to the prior art removable drawer unit for power distribution circuits that can only achieve a cabinet width of 600mm and a unit depth of 500mm, this reduces the steel plate usage per unit by 3kg. Calculated at a steel plate unit price of 6 yuan, the cost of steel plate usage is reduced by 18 yuan. One switch cabinet device has an average of 7 units. One switch cabinet device with a cabinet width of 600 mm, a cabinet depth of 1000 mm, and a unit depth of 450 mm can reduce the use of steel plates by 12.6 kg. Based on the unit price of steel plates at 6 yuan, the cost of steel plate use is reduced by 75.6 yuan. The application of 10,000 sets of switch cabinet devices for power distribution circuits equipped with the movable drawer units of the present invention can save 130 to 220 tons of steel plates.

[0163] The movable drawer unit technical solution of the present invention is used for the power distribution circuit. The area of a switch cabinet with a cabinet width of 500 mm and a cabinet depth of 1000 mm is reduced by 0.1 m2 compared with the switch cabinet with a cabinet width of 600 mm and a cabinet depth of 1000 mm in the prior art.

[0164] Compared with the removable drawer unit disclosed in Chinese patent application 200920037161.2, when used for control circuits, the switch cabinet equipment using the removable drawer unit of the present invention can achieve a unit depth of 500 mm and a unit chamber height of 150 mm when the cabinet width is 600 mm and the cabinet depth is 1000 mm, while the unit height in the prior art can only be 200 mm.

[0165] When used in a control circuit, the movable drawer unit of the present invention can achieve a cabinet width of 500mm, a cabinet depth of 1000mm, and a unit depth of 500mm when the current level is 63A-250A, and can replace a switch cabinet device with a cabinet width of 600mm of the same current level.

[0166] When a 500mm wide cabinet is used for a control circuit switch cabinet, the unit height of a movable drawer unit with a current level of 63A to 100A can be 150mm. In the prior art, the minimum unit height of a movable drawer unit is 200mm. One switch cabinet device has only 9 circuits, while the present invention can achieve 12 circuits per switch cabinet device. The density of small current control circuit equipment is improved, copper is saved on the horizontal busbar, the total amount of switch cabinet equipment is reduced, the cost is reduced, the cabinet body is small, the space occupied is reduced, and mechanical failures of unit propulsion can be basically eliminated, which is of great significance for the application of engineering projects.

Claims

1. An interlocking mechanism for a movable drawer unit, characterized in that: A position interlocking mechanism is included, wherein the position interlocking mechanism includes: A position interlocking drive plate (1), the position interlocking drive plate (1) being swingably mounted on a fixed portion of the movable drawer unit and swinging to one side under the action of an elastic member; A movable part position locking plate (2) is used for cooperating with the position interlocking driving plate (1) to perform position positioning, the movable part position locking plate (2) is located on the back of the movable drawer unit, the movable part position locking plate (2) is fixed to the movable part, and is used to enable the movable part position locking plate (2) to move forward and backward with the movable part, and the movable part position locking plate (2) has a positioning guide surface, and the positioning guide surface has position positioning openings arranged front and back; The position interlocking drive plate (1) has a positioning piece extending to the back of the fixed part and cooperating with the positioning guide surface. The position interlocking drive plate (1) swings to one side under the action of the elastic member, so as to make the positioning piece fit the positioning guide surface and be embedded in the corresponding position positioning opening when the movable part moves forward and backward into the corresponding position, thereby positioning the movable part.

2. The interlocking mechanism of the movable drawer unit according to claim 1, wherein: The movable part position locking plate (2) is connected to the fixed part via a translatable connection structure so as to be translatable forward and backward.

3. The interlocking mechanism of the movable drawer unit according to claim 2, wherein: The translatable connection structure between the movable part position locking plate (2) and the fixed part is specifically a sliding groove type connection structure, and the sliding groove type connection structure specifically comprises a sliding groove (3) and a sliding groove screw (4) passing through the sliding groove (3) for connection and installation.

4. The interlocking mechanism of the movable drawer unit according to claim 1, wherein: The positioning guide surface is located inside the movable part position locking plate (2), the movable part position locking plate (2) has a position locking yielding groove (5), and the positioning guide surface is a side surface of the position locking yielding groove (5).

5. The interlocking mechanism of the movable drawer unit according to claim 1, wherein: The invention also includes a position display mechanism, which is installed on the fixed part of the movable drawer unit. The position display mechanism has a position display driving plate (6), which is swingably installed on the fixed part of the movable drawer unit. The movable part position locking plate (2) has a display guide groove (8). The position display driving plate (6) has a display driving member that cooperates with the display guide groove (8). The display driving member extends to the back of the fixed part and is embedded in the display guide groove (8). When the movable part moves forward and backward to enter the corresponding position, the display guide groove (8) drives the position display driving plate (6) to swing through the display driving member. The swing of the position display driving plate (6) drives the position display plate (7) of the position display mechanism to move, thereby performing position display.

6. The interlocking mechanism of the movable drawer unit according to claim 1, wherein: The position interlocking mechanism further comprises a screw position locking plate (9) driven by a position interlocking driving plate (1), the head end of the screw position locking plate (9) being inserted into a position locking notch (11) on the side of the front end of the screw (10) to lock the position of the screw (10), the screw position locking plate (9) and the position interlocking driving plate (1) being mounted on a mounting base (12) and mounted on a fixed part of the movable drawer unit through the mounting base (12), the front portion of the mounting base (12) having a protruding mounting groove. A locking plate fixing bracket is mounted on a base plate (12); a screw rod position locking plate (9) is installed on the locking plate fixing bracket in a left-right translational manner via a translationally movable connection structure; upper ends of the locking plate fixing bracket and the screw rod position locking plate (9) are provided with a closing interlocking notch (13) for cooperating with a closing interlocking mechanism to perform closing interlocking; when the screw rod position locking plate (9) locks the position of the screw rod (10), the closing interlocking notches (13) on the locking plate fixing bracket and the screw rod position locking plate (9) overlap.

7. A removable drawer unit, characterized by: It comprises a fixed part and a movable part, and the fixed part and the movable part are interlocked by the interlocking mechanism of the movable drawer unit according to claim 1.

8. The movable drawer unit according to claim 7, wherein: A translationally movable connection structure is provided between the fixed part and the movable part, for connecting the fixed part and the movable part together so as to be able to translate forward and backward. The bottom of the movable part is provided with a T-shaped sliding column (15), for hooking and cooperating with a guide rail (17) in the unit chamber (16) to perform propulsion, guidance and limiting.

9. The movable drawer unit according to claim 8, wherein: The translationally movable connection structure between the fixed part and the movable part is located on the left and right sides of the movable drawer unit.

10. The movable drawer unit according to claim 8, wherein: The fixed part includes a propulsion interlocking substrate (18) and a slide bracket (19) on both sides of the propulsion interlocking substrate (18); a propulsion screw (10) is installed on the fixed part; the propulsion interlocking substrate (18) is used for installing the propulsion screw (10) and the position interlocking mechanism; the slide brackets (19) on both sides also extend to both sides of the movable part respectively; the translatable connection structure between the fixed part and the movable part is respectively located on the slide bracket (19) and the movable part; the translatable connection structure between the fixed part and the movable part is specifically a slide type connection structure; the slide type connection structure specifically includes a slide (3) and a slide screw (4) passing through the slide (3) for connection and installation; the slide (3) is located on the side of the slide bracket (19); the slide screw (4) passes through the slide (3) to connect the slide bracket (19) and the movable part together so that they can be translated back and forth; Alternatively, the chute (3) is located on the side of the movable part, and the chute screw (4) passes through the chute (3) to connect the chute bracket (19) and the movable part together so that they can move forward and backward.

11. The movable drawer unit according to claim 10, wherein: The propulsion screw rod (10) is mounted on the propulsion interlocking base plate (18) via a screw rod mounting seat (20); the movable part is provided with a nut (21) which cooperates with the propulsion screw rod (10) to push the movable part forward and backward; the nut (21) is mounted on the movable part via a nut mounting seat (22).

12. The movable drawer unit according to claim 10, wherein: The propulsion interlocking substrate (18) is also equipped with a position display mechanism and a unit locking mechanism. An upper cover plate (24) is equipped with the propulsion interlocking substrate (18). The upper cover plate (24) covers the position interlocking mechanism, the position display mechanism and the unit locking mechanism. A closing interlocking mechanism is equipped with the upper cover plate (24).

13. The movable drawer unit according to claim 7 or 10, characterized in that: The movable part includes a bottom plate, which is divided into two parts, namely a front screed plate (27) and a rear bottom plate (28). The screed plate (27) is used for installing the screed (21). The movable part is connected to the fixed part through the screed plate (27) so as to be movable forward and backward.

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