Switch cabinet drawer hand-operated three-position locking and advancing mechanism

Abstract

The utility model discloses a switchgear drawer hand -operated three position locking propulsion mechanism, including the baffle and the mechanism bottom plate on the baffle movement, the mechanism bottom plate is movable and is provided with the side lock board along the set direction, the movement of side lock board includes the locking position and the unlocking position for locking and unlocking drawer respectively, a plurality of top blocks are provided on the side lock board along the drawer movement direction. The utility model sets up hand -operated screw rod on the basis of the drawer in -out action to switchgear, realizes the drive of hand -operated screw rod to drawer through the locking limit of lock nut on the baffle to the locking limit of drawer, guarantees the controllable of drawer swing -in rate, stability when saving the effort of screw drive, so that the user can more stable, accurate, fast swing drawer to the required position.

Description

Technical Field

[0001] This utility model belongs to the field of low-voltage switchgear and relates to a hand-cranked three-position locking and pushing mechanism for a switch cabinet drawer. Background Technology

[0002] In low-voltage switchgear, the drawers inside the switch cabinet are equipped with a large number of high-current components to form an integrated multi-functional working unit, which is an important part of the switch cabinet.

[0003] In existing switchgear, the drawers have multiple working positions within the switchgear to accommodate different testing tasks. Due to the high precision requirements of high-current equipment connections, users have very high requirements for the position of the drawers when pushing them in and pulling them out of the switchgear. However, due to the large number of components, the weight of the drawers is generally around tens of kilograms. The user's control over the drawers is affected by various factors, such as the impact of the drawer's own weight on the positioning and locking structure, and the inertia caused by excessive weight. Traditional positioning and locking structures are difficult to bear heavy loads and are prone to deformation, skipped teeth, and thread breakage during long-term use. All of these factors lead to inaccurate positioning of the drawers, unsmooth switching between multiple positions, and difficulty in locking the drawers in multiple positions. Utility Model Content

[0004] In order to overcome the shortcomings of the prior art, this utility model provides a hand-cranked three-position locking and pushing mechanism for switch cabinet drawers.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A hand-cranked three-position locking and pushing mechanism for a switch cabinet drawer includes a partition and a mechanism base plate that moves on the partition. A side locking plate is movably disposed on the mechanism base plate along a predetermined direction. The side locking plate's movement includes a locking position and an unlocking position for locking and unlocking the drawer. Multiple top blocks are disposed on the side locking plate along the drawer's movement direction. A hand-cranked screw and a lock nut are disposed on the mechanism base plate. The hand-cranked screw's axial direction is along the drawer's movement direction. The hand-cranked screw is rotatably connected to the mechanism base plate. The lock nut is threadedly connected to the hand-cranked screw. A limiting area is disposed on the partition plate for engaging and limiting the lock nut. Multiple locking grooves are sequentially formed on the outer wall of the hand-cranked screw along its axial direction. A screw locking post is movably disposed on the lock nut. When the side locking plate is in the locked position, the top blocks abut against the screw locking post and drive the screw locking post to pass through one of the locking grooves to lock the hand-cranked screw.

[0007] Furthermore, the base plate of the mechanism is provided with a straight groove for the lock nut to pass through and move. A collision post is provided at the bottom of the lock nut. A lock block fixing plate is fixedly provided on the partition plate. A left lock block and a right lock block are symmetrically arranged inside the lock block fixing plate. A left top spring and a right top spring are respectively provided between the left lock block and the right lock block and the inner wall of the lock block fixing plate. The left lock block and the right lock block abut against each other to form the limiting area for engaging the collision post.

[0008] Furthermore, the bottom of the mechanism base plate is provided with a latch, which includes a left stop and a right stop for abutting against the outer side of the left locking block and the outer side of the right locking block, respectively. The left stop and the right stop are arranged along the axial direction of the hand crank screw and are parallel to each other.

[0009] Furthermore, the collision post is hinged with a lead screw rear locking block, and a rear push spring is provided between the lead screw rear locking block and the collision post for compression when the lead screw rear locking block abuts against the inner wall of the limiting area. The hand-cranked lead screw has an extraction locking groove for the end of the lead screw rear locking block to enter, and the two side walls of the extraction locking groove abut against the lead screw rear locking block to limit the rotational direction of the hand-cranked lead screw.

[0010] Furthermore, a fixed plate is fixedly mounted on the base plate of the mechanism, and the side locking plate and the unlocking push plate pass through the fixed plate. A first spring is provided between the unlocking push plate and the fixed plate. A locking rod is provided on the side locking plate, and a sliding groove for the locking rod to pass through is provided on the unlocking push plate. The sliding groove forms a set acute angle with the moving direction of the side locking plate. A three-position positioning member is provided on the partition plate. The three-position positioning member has multiple opening slots for accommodating the locking rod. The multiple opening slots are spaced apart along the moving direction of the drawer. A side locking hole is provided on the side locking plate for the side locking pin to pass through. The side locking hole includes a narrow hole for axially limiting the side locking pin and a hole for axially limiting the side locking pin. The movement direction of the plate limits the expansion hole of the side locking pin. The narrow hole communicates with the expansion hole. The side locking pin is provided with a columnar part and a waisted part in sequence along the axial direction. The outer diameter of the waisted part is smaller than the outer diameter of the columnar part. The outer diameter of the columnar part is slightly smaller than the inner diameter of the expansion hole and larger than the inner diameter of the narrow hole. The outer diameter of the waisted part is smaller than the inner diameter of the narrow hole. The three-position positioning member also includes a plurality of bosses and grooves that are alternately connected along the drawer movement direction. One end of the side locking pin abuts against the surface of the boss or the groove. The other end is provided with a second spring that provides elastic force to the side locking pin toward the three-position positioning member. The opening slot and the groove are aligned perpendicular to the drawer movement direction.

[0011] Furthermore, it also includes a slider, a third spring is provided between the slider and the three-position positioning component, and the slider is respectively provided with a first stop block located in the opening groove and a second stop block located in the groove.

[0012] Furthermore, it also includes a position indicating component, which includes an indicating rod passing through the lock nut. The indicating rod is rotatably connected to the base plate of the mechanism. A spiral groove is formed on the outer periphery of the indicating rod along the axial direction. An indicating guide post passes through the lock nut. One end of the indicating guide post is connected to the spiral groove, and the other end is provided with an indicating guide spring for the indicating guide post to extend into the spiral groove. An indicating mark is provided at the end of the indicating rod.

[0013] Furthermore, it also includes a square rod support, on which a chain square rod is movably inserted. A square rod chain plate is connected to the square rod support via a rotating shaft. An arc groove is formed on the square rod chain plate. One end of the chain square rod is provided with a sliding shaft for passing through the arc groove. The rotation of the square rod chain plate drives the lifting and lowering of the chain square rod. The front end of the partition is provided with a flange for abutting against the lower end of the chain square rod.

[0014] Furthermore, a rocker wheel baffle is provided on the base plate of the mechanism. The rocker wheel baffle slides with the base plate of the mechanism to move between a blocking position and an open position. An avoidance opening is provided on the rocker wheel baffle, and a crank handle through hole is provided on the base plate of the mechanism. In the blocking position and the open position, the avoidance opening is offset from and communicates with the crank handle through hole, respectively. An inclined groove is provided on the unlocking push plate, and one end of the rocker wheel baffle extends into and abuts against the inclined groove. A protrusion is provided on the interlocking square rod, and a slot is provided on the base plate of the mechanism for the protrusion to enter under the lifting action of the interlocking square rod. In the blocking position, the avoidance opening communicates with the slot.

[0015] Furthermore, the base plate of the mechanism is also provided with a micro switch and a touch spring. The unlocking push plate has an opening for the touch spring to pass through. One end of the touch spring is connected to the base plate of the mechanism, and the other end abuts against the contact of the micro switch.

[0016] In summary, the advantages of this utility model are as follows:

[0017] This invention, based on the action of a drawer moving in and out of the switch cabinet, incorporates a hand-cranked screw. The screw, driven by a limiting zone on the partition, locks the drawer's locking nut, thus driving the drawer forward. While using a threaded drive that saves effort, it ensures controllable drawer forward speed and stability, allowing users to move the drawer to the desired position more stably, accurately, and quickly. Furthermore, multiple locking slots are provided on the hand-cranked screw, which, in conjunction with the side locking plate and top block, pushes the screw locking pin on the locking nut, achieving precise locking of multiple points along the axial direction of the hand-cranked screw, i.e., the drawer's movement direction. This allows users to precisely move the drawer in and out and position it accurately in multiple working positions within the switch cabinet. Moreover, the locking method of the screw locking pin and the screw is independent of the connection structure between the drawer and the switch cabinet, unaffected by the drawer's weight, and resistant to deformation and damage over long-term use, effectively ensuring accurate locking. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the drawer and partition of this utility model.

[0019] Figure 2 This is a schematic diagram of the internal structure of the base plate of the mechanism.

[0020] Figure 3 for Figure 2 A schematic diagram of the hand-cranked propulsion component.

[0021] Figure 4 for Figure 2 A structural diagram from another perspective.

[0022] Figure 5 This is a structural diagram of the positioning component and the hand-cranked propulsion component.

[0023] Figure 6 for Figure 5 A schematic diagram of the structure from the bottom middle view.

[0024] Figure 7 This is a structural diagram showing the locking position of the side locking plate of the positioning component.

[0025] Figure 8 This is a structural schematic diagram of a three-station positioning component.

[0026] Figure 9 This is a schematic diagram of the structure of the lead screw rear locking block and the extraction locking groove.

[0027] Figure 10 for Figure 1 An enlarged diagram of A in the diagram.

[0028] Figure 11 This is a schematic diagram of the locking block structure.

[0029] Figure 12This is a schematic diagram of a hand-cranked lead screw.

[0030] Figure 13 This is a schematic diagram of the indicator rod.

[0031] Figure 14 This is a schematic diagram of the rocker wheel baffle.

[0032] Figure 15 This is a schematic diagram of the interlocking square rod structure.

[0033] The diagram shows the following markings: 11. Mechanism base plate; 111. Straight groove; 112. Crank handle through hole; 113. Slot; 12. Partition plate; 21. Fixing bracket; 22. Unlocking push plate; 221. Slide groove; 222. First spring; 223. Inclined groove; 224. Opening; 23. Side locking plate; 231. Side locking hole; 232. Top block; 24. Locking rod; 25. Side locking post; 251. Waist section; 252. Second spring; 26. Three-position positioning component; 261. Opening groove; 262. Groove; 263. Slider; 264. First stop block; 265. Second stop block; 27. Micro switch; 28. Contact spring; 31. Hand crank screw; 11. Isolation locking groove; 312. Test locking groove; 313. Connection locking groove; 314. Pull-out locking groove; 32. Screw locking post; 331. Left locking block; 332. Right locking block; 333. Limiting zone; 334. Lock block fixing plate; 34. Locking buckle; 35. Lock nut; 351. Collision post; 352. Screw rear locking block; 4. Indicator rod; 41. Spiral groove; 42. Indicator guide post; 43. Indicator guide spring; 51. Square rod bracket; 511. Sliding shaft; 52. Square rod interlocking plate; 521. Arc groove; 53. Interlocking square rod; 531. Protrusion; 6. Rocker wheel baffle; 61. Clearance opening; 62. Baffle return spring. Detailed Implementation

[0034] The following specific examples illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. This utility model can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this utility model. It should be noted that, unless otherwise specified, the following embodiments and features described therein can be combined with each other.

[0035] It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of the present invention. Therefore, the drawings only show the components related to the present invention and are not drawn according to the number, shape and size of the components in actual implementation. In actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0036] In this embodiment of the invention, all directional indicators (such as up, down, left, right, front, back, horizontal, vertical, etc.) are only used to explain the relative positional relationship and movement of each component in a specific posture. If the specific posture changes, the directional indicator will also change accordingly.

[0037] Due to installation errors and other reasons, the parallel relationship referred to in the embodiments of this utility model may actually be an approximate parallel relationship, and the perpendicular relationship may actually be an approximate perpendicular relationship.

[0038] This embodiment provides a hand-cranked three-position locking and pushing mechanism for a switch cabinet drawer, used to switch and lock multiple working positions by pushing and pulling the drawer inwards and outwards relative to the switch cabinet. (Refer to...) Figure 1 The hand-cranked three-position locking and pushing mechanism includes a partition 12 installed inside the switch cabinet and a mechanism base plate 11 installed on the drawer. The mechanism base plate 11 is located directly above the partition 12. The drawer on the mechanism base plate 11 contains electrical components. The switch cabinet contains contacts for connecting to the electrical components. The partition 12 is equipped with a slide rail. The mechanism base plate 11 is connected to the slide rail, allowing the drawer to slide along the slide rail on the partition 12, realizing entry and exit relative to the switch cabinet. Furthermore, the drawer has three specific position states relative to the switch cabinet during the entry and exit process, including a connection position, a test position, and an isolation position. The positional relationship of the connection position, test position, and isolation position is arranged sequentially from the inside of the switch cabinet to the outside. The three positions represent three states: the electrical components of the drawer are connected to the switch cabinet with a large current, the electrical components of the drawer are connected to the switch cabinet with a small current, and the electrical components of the drawer are disconnected from the switch cabinet.

[0039] The base plate 11 of the mechanism is equipped with a positioning component and a hand-cranked push component. The positioning component is used to lock the base plate 11 in three position states, and the hand-cranked push component is used to precisely move and switch the drawer between the three positions.

[0040] Reference Figures 2 to 5The positioning assembly includes a three-position positioning component 26, a fixing frame 21, an unlocking push plate 22, a locking rod 24, and a side locking plate 23. The fixing frame 21 is fixedly installed on the base plate 11 of the mechanism by welding or bolt connection. The fixing frame 21 has a first groove for the unlocking push plate 22 to pass through and for the unlocking push plate 22 to reciprocate in a first direction. The fixing frame 21 also has a second groove for the side locking plate 23 to pass through and for the side locking plate 23 to reciprocate in a second direction. Preferably, the first direction and the second direction are... The locking rod 24 is fixedly connected to the side locking plate 23 in a vertical direction. The unlocking push plate 22 has a groove 221 along the third direction. The locking rod 24 passes through the groove 221 and can move horizontally along the third direction within the groove 221. By setting the third direction of the groove 221 to form an acute angle with the first direction and the second direction respectively, when the unlocking push plate 22 moves horizontally along the first direction, the groove 221 will exert a force on the locking rod 24 to drive the side locking plate 23 to move horizontally along the second direction.

[0041] The three-position positioning component 26 is mounted on the partition plate 12 and is fixedly connected to the partition plate 12. The lower end of the locking rod 24 passes through the mechanism base plate 11 and extends toward the partition plate 12. (Refer to...) Figure 8 The three-position positioning component 26 is provided with multiple opening slots 261 for engaging with the lower end of the locking rod 24. The opening slots 261 have a U-shaped opening structure, and the multiple opening slots 261 are distributed sequentially at a set interval along the drawer's in-and-out movement direction. The two moving ends of the side locking plate 23 and the locking rod 24 in the second direction are respectively the locked position and the unlocked position. When in the unlocked position, refer to... Figure 6 The locking lever 24 is located outside the opening slot 261. During the drawer's inward and outward movement, the locking lever 24 does not contact the three-position positioning component 26, allowing the mechanism base plate 11 to switch between the connecting position, the testing position, and the isolation position. When in the locked position, refer to... Figure 7 The locking rod 24 can enter any one of the opening slots 261. The locking rod 24 is restricted by the opening slot 261, preventing the mechanism base plate 11 from moving and achieving a locking effect. The positions of the locking rod 24 in the three opening slots 261 correspond to the connection position, test position and isolation position of the drawer, respectively.

[0042] A first spring 222 is provided between the unlocking push plate 22 and the fixing bracket 21. The first spring 222 provides elastic force in the first direction to the unlocking push plate 22. When no other external force is applied, the first spring 222 provides elastic force to the unlocking push plate 22 and the side locking plate 23 to maintain the locked position. When the unlocking push plate 22 is pushed to compress the first spring 222, it can be maintained in the unlocked position.

[0043] To optimize the user experience, the positioning assembly also includes a side locking post 25. The side locking post 25 is connected to the fixing frame 21 via a second spring 252. The second spring 252 provides a downward elastic force to the side locking post 25 towards the partition plate 12. The lower half of the side locking post 25 is configured as a tapered structure for contacting the three-position positioning member 26. The upper half of the side locking post 25 has a columnar part and a waisted part 251 arranged sequentially along the axial direction. The outer diameter of the waisted part 251 is smaller than the outer diameter of the columnar part. The side locking plate 23 has a side locking hole 231, which includes an enlarged hole and a narrow hole that are sequentially distributed and connected along the second direction. The connecting portion of the enlarged hole and the narrow hole allows the waisted portion 251 of the side locking pin 25 to pass through. The inner diameter of the enlarged hole is larger than the outer diameter of the columnar portion, and the inner diameter of the narrow hole is larger than the outer diameter of the waisted portion 251 and smaller than the outer diameter of the columnar portion. The side locking pin 25 is inserted into the enlarged hole. When the columnar portion and the side locking hole 231 are at the same horizontal position in the axial movement position of the side locking pin 25, the side locking plate 23 is blocked by the columnar portion and cannot move in the second direction. When the waisted portion 251 and the side locking hole 231 are at the same horizontal position, the side locking plate 23 can move in the second direction to allow the waisted portion 251 to move between the narrow hole and the enlarged hole.

[0044] Correspondingly, the three-position positioning component 26 is provided with a wave structure, which includes multiple bosses and grooves 262 arranged alternately along the push-pull direction of the mechanism base plate 11. Adjacent bosses and grooves 262 are connected by ramps, and multiple grooves 262 are respectively aligned with multiple opening slots 261 in the direction perpendicular to the drawer movement.

[0045] When the drawer is in any of the following positions—connected, test, or isolated—and the side lock plate 23 is in the locked position, the waist portion 251 of the side lock pin 25 is located within the narrow hole of the side lock plate 23. The axial movement of the side lock pin 25 is restricted by the narrow hole. Referring to the figure, when the drawer is to be put in or pushed out, the unlocking push plate 22 needs to be operated to move horizontally, causing the side lock plate 23 to move from the locked position to the unlocked position. At this time, the side lock hole 231 moves horizontally relative to the side lock pin 25, so that the side lock pin 25 is located within the enlarged hole. Then, the side lock pin 25 moves axially toward the three-position positioning member 26 under the elastic force of the second spring 252, so that the columnar portion and the side lock hole 231 are at the same horizontal position. Then, the side lock pin 25 abuts against the side lock plate 23, keeping the side lock plate 23 in the unlocked position, so that the mechanism base plate 11 can perform push-pull operations.

[0046] When the drawer is moved from one position to another adjacent position, the side locking plate 23 and the side locking pin 25 in the unlocked position move synchronously under the action of the mechanism base plate 11. The tapered end of the bottom of the side locking pin 25 contacts the wave structure. The bottom end of the side locking pin 25 moves from the lower end of the wave structure or the bottom of the groove 262 towards the top of the adjacent boss. During the movement, the side locking pin 25 undergoes an upward axial displacement, causing the columnar part to disengage from the side locking hole 231 and the waisted part 251 to enter the side locking hole 231. At this time, the limiting position of the side locking plate 23 in the second direction is released. As the base plate 11 of the lock mechanism moves further, the bottom of the side lock pin 25 moves from the top of the boss to the bottom of the adjacent groove 262. During the movement, the bottom of the lock rod 24 approaches the opening slot 261 corresponding to the groove 262. Under the action of the first spring 222, the lock rod 24 enters the opening slot 261, and at the same time, the waist part 251 of the side lock pin 25 enters the narrow hole, so that the side lock plate 23 switches to the locked position, and the unlocking push plate 22 pops out and resets. At this time, the drawer completes the movement and switching from any one of the connected position, test position, and isolation position to another adjacent position.

[0047] In summary, when changing the position of the drawer, only one press of the unlocking push plate 22 is needed to move the drawer to complete the change. There is no need to hold down the unlocking push plate 22 while moving the drawer, which greatly simplifies the operation, improves the safety of operation, and enhances the user experience.

[0048] Furthermore, to provide the drawer with the function of directly switching from the isolated position to the connected position, the three-position positioning component 26 is also provided with a slider 263. The slider 263 is provided with a first stop 264 and a second stop 265. The first stop 264 is located in the opening groove 261 corresponding to the connected position and is used to block the opening of the opening groove 261. The second stop 265 is located in the groove 262 corresponding to the connected position, and the top of the second stop 265 is flush with the top of the adjacent boss. The slider 263 and the three-position positioning component 26 are movably connected by a third spring, so that the slider 263 can move relative to the three-position positioning component 26 within a set range. When no other external force is applied, the first stop 264 is maintained in the position of blocking the opening of the opening groove 261, and the second stop 265 is maintained in the position of connecting with the adjacent boss.

[0049] When the drawer is to be moved directly from the isolated position to the connected position, continuous pressure is applied to the unlocking push plate 22, keeping the side locking plate 23 and the locking rod 24 in the unlocked position. At this time, the side locking pin 25 is located in the enlarged hole. Pushing the drawer allows the side locking pin 25 to pass through the wave structure without contacting the side locking plate 23. At this time, the drawer can be moved directly from the isolated position to the connected position. After the drawer moves to the connected position, the bottom end of the side locking pin 25 abuts against the top of the second stop 265, so that the waist part 251 of the side locking pin 25 is at the same horizontal position as the side locking hole 231. Referring to the figure, the lock is then released. The pressing effect of the unlocking push plate 22 causes it to spring back to its original position under the action of the first spring 222, which in turn moves the side lock plate 23 to the locked position. The waist part 251 of the side lock pin 25 enters the narrow hole, and the locking rod 24 enters the opening slot 261, completing the locking action. Simultaneously, as the locking rod 24 moves into the opening slot 261, it pushes the first stop 264. The slider 263 moves, causing the second stop 265 to move and disengage from the bottom end of the side lock pin 25, leaving the bottom end of the side lock pin 25 empty. This allows for subsequent operations such as pressing the unlocking push plate 22 to unlock and move the drawer to change its position.

[0050] Reference Figure 3 and Figure 5 The hand-cranked propulsion assembly includes a lock nut 35 and a hand-cranked screw 31. The axial direction of the hand-cranked screw 31 is set parallel to the direction of the drawer's movement in and out. The rear end of the hand-cranked screw 31 is rotatably connected to the base plate 11 of the mechanism through bearings and other rotatable connecting parts. The front end of the hand-cranked screw 31 is provided with a rocking wheel for connecting with a crank handle. The rocking wheel is provided with an internal hexagonal hole for the crank handle to be inserted. After the crank handle is inserted, the rotation of the hand-cranked screw 31 can be driven by rotating the crank handle. The lock nut 35 is threadedly connected to the hand-cranked screw 31. When the hand-cranked screw 31 rotates, it drives the lock nut 35 to move axially relative to the hand-cranked screw 31.

[0051] Reference Figure 10 The bottom of the base plate 11 of the mechanism has a through straight groove 111. The lower part of the lock nut 35 passes through the straight groove 111 and moves along the straight direction of the straight groove 111 when driven by the hand crank screw 31. The bottom of the lock nut 35 is provided with a collision post 351. A locking block structure for limiting the collision post 351 is installed on the partition plate 12. (Refer to...) Figure 11The locking block structure includes a locking block fixing plate 334 fixedly installed on the partition plate 12. The locking block fixing plate 334 is a square hollow frame. A left locking block 331 and a right locking block 332 are symmetrically arranged inside the locking block fixing plate 334. A left top spring and a right top spring are respectively provided between the left locking block 331 and the right locking block 332 and the inner wall of the locking block fixing plate 334. The left and right top springs provide elastic force to the left locking block 331 and the right locking block 332 to move towards each other and abut against each other, so that the left locking block 331 and the right locking block 332 close together to form a limiting area 333 for locking and limiting the collision post 351. The left locking block The relative movement direction of 331 and right locking block 332 is perpendicular to the axis of the hand crank screw 31. When the hand crank screw 31 drives the lock nut 35 to move, the collision pin 351 can push the left locking block 331 and right locking block 332 to move away from each other and separate, so that the collision pin 351 enters the limiting area 333. When the left locking block 331 and right locking block 332 rebound towards each other and abut against the collision pin 351, the position of the left and right locking blocks 332 is further fixed. The collision pin 351 is limited and fixed, so the lock nut 35 and the partition 12 are fixed. When the hand crank screw 31 is rotated, it drives the entire drawer to move.

[0052] When the drawer is located outside the isolation position, the collision post 351 is not within the limit zone 333. At this time, the drawer can be pushed or pulled by external force to move within a set small range outside the isolation position. Pushing the drawer towards the isolation position, the collision post 351 contacts and pushes open the left and right locking blocks 332 on both sides during the movement to enter the limit zone 333. After the collision post 351 is within the limit zone 333, the external force cannot further push the drawer into the switch cabinet. At this time, the drawer can be driven to move into the switch cabinet by rotating the hand crank screw 31 with a crank handle, that is, the drawer is cranked in the direction from the isolation position to the test position to the connection position.

[0053] Furthermore, a latch 34 is also provided at the bottom of the base plate 11. The latch 34 has two parallel left and right stops arranged along the axial direction of the hand crank screw 31. Preferably, the latch 34 has a U-shaped structure. When the drawer is cranked into the isolation position, the ends of the left and right stops of the latch 34 move to the outside of the left locking block 331 and the outside of the right locking block 332, respectively, thus limiting the movement of the left and right locking blocks 332 away from each other. The axial distribution of the latch 34 along the hand crank screw 31 ensures that when the drawer moves within the range between the isolation position and the connection position, the left and right stops remain in contact with the left locking block 331. The limiting positions on both sides of the right locking block 332 and the right locking block 31 ensure that when the drawer is rocked out from the connecting position to the test position to the isolation position, the collision pin 351 remains within the limiting area 333. This ensures that the movement of the drawer between the three positions is driven by the hand crank screw 31, guaranteeing the stability and accuracy of the drawer's movement. When the drawer is about to move out of the isolation position, the left and right stops will move away from the left and right locking blocks 332 simultaneously to release their limiting positions. As a result, the collision pin 351 can push open the left and right locking blocks 332 and move out of the limiting area 333, allowing the drawer to be freely pushed and pulled out of the isolation position.

[0054] Furthermore, refer to Figure 12 The outer periphery of the hand-cranked screw 31 is provided with an isolation locking groove 311, a test locking groove 312, and a connection locking groove 313 respectively at the three axial positions corresponding to the isolation position, the test position, and the connection position. The screw locking pin 32 is movably provided on the lock nut 35. When the drawer is in one of the three positions and the hand-cranked screw 31 is in the corresponding axial position, one end of the screw locking pin 32 can be inserted into the corresponding one of the three locking grooves to lock the hand-cranked screw 31 at any of the isolation position, the test position, and the connection position, so that it cannot rotate or move.

[0055] Specifically, a lock rod return spring is fitted on the lead screw lock rod 32. The two ends of the lock rod return spring are connected to the lead screw lock rod 32 and the lock nut 35, respectively. The lock rod return spring provides a spring force to the lead screw lock rod 32 away from the hand-cranked lead screw 31. Therefore, when no other external force is applied, the lead screw lock rod 32 will not enter any locking groove. Multiple top blocks 232 are also provided on the side lock plate 23 near the hand-cranked lead screw 31. These multiple top blocks 232 are arranged sequentially along the drawer's in / out movement direction, preferably three, and are respectively used to contact and abut against the lead screw lock rod 32 when the drawer is in the isolation position, test position, or connection position; when the drawer is in any of the isolation position, test position, or connection position... When the drawer is locked, pressing the unlocking push plate 22 moves the side locking plate 23 from the locked position to the unlocked position along the second direction. The top block 232 moves away from the screw locking pin 32, causing the screw locking pin 32 to disengage from the corresponding locking groove, thus unlocking the hand crank screw 31. The user can then crank the hand crank screw 31 to move the drawer to another position. When the drawer is moved to one of the isolation position, test position, or connection position, the movement of the side locking plate 23 from the unlocked position to the locked position along the second direction will cause the corresponding top block 232 to abut against the screw locking pin 32, causing the screw locking pin 32 to extend into the corresponding locking groove on the hand crank screw 31, automatically locking the hand crank screw 31.

[0056] To ensure accurate correspondence between the position of the hand crank screw 31 and the drawer position, and to ensure that the axial and rotational positions of the hand crank screw 31 remain consistent each time the drawer is moved to any of the three identical positions, a screw locking block 352 is also provided. (Refer to...) Figure 9The lead screw rear locking block 352 is hinged to the rear side of the collision post 351. A rear push spring is provided between the lead screw rear locking block 352 and the collision post 351. The lead screw rear locking block 352 has an open position and a retracted position during rotation. The rear push spring provides elastic force to the lead screw rear locking block 352 towards the open position. The hand crank lead screw 31 has a pull-out locking groove 314 for the end of the lead screw rear locking block 352 to enter. When the lead screw rear locking block 352 is located in the pull-out locking groove 314, the two side walls of the pull-out locking groove 314 will abut against the lead screw rear locking block 352, forming a limit on the upward rotation of the hand crank lead screw 31, preventing the hand crank lead screw 31 from rotating. The pull-out locking groove 314 is located on the side of the isolation locking groove 311 opposite to the test locking groove 312 in the axial direction of the hand crank lead screw 31. When the drawer is in the isolation position, the collision... The strike post 351 is located within the limiting zone 333, causing the locking block 352 behind the screw to be abutted against the inner wall of the limiting zone 333 and placed in the retracted position. At this time, the end of the locking block 352 behind the screw has no contact interference with the hand crank screw 31, and does not affect the axial movement and rotation of the hand crank screw 31 between the isolated position and the connected position. When the drawer is about to be pulled out from the isolated position, the action of the strike post 351 retracting from the limiting zone 333 causes the locking block behind the hand crank screw 31 to no longer be abutted, and then the back spring moves it to the open position, so that its end enters the pull-out locking groove 314, thereby locking the rotation of the hand crank screw 31, so that the user can no longer continue to turn the hand crank screw 31, thereby preventing the user from turning the hand crank screw 31 to an uncertain axial position and rotation position, thus achieving the effect of accurate correspondence between the position of the hand crank screw 31 and the position of the drawer.

[0057] To prevent the safety risks caused by the drawer being accidentally pulled out excessively, the base plate 11 of the mechanism is also equipped with a square rod bracket 51 and a locking square rod 53, as shown in the reference. Figure 15 The interlocking square rod 53 is mounted on the square rod bracket 51 and passes downward through the mechanism base plate 11. The interlocking square rod 53 can move vertically so that its lower end can contact the partition plate 12. The front end of the partition plate 12 is provided with a flange or step or other protrusion. When the interlocking square rod 53 is in the downward position, during the outward pulling process of the mechanism base plate 11, the interlocking square rod 53 will press against the flange or step, preventing the mechanism base plate 11 from being pulled out further, thus ensuring safety.

[0058] Furthermore, a square rod interlocking plate 52 is provided on the square rod support 51. The square rod interlocking plate 52 is connected to the square rod support 51 through a rotating shaft, so that the square rod interlocking plate 52 can rotate relative to the square rod support 51 with the rotating shaft as the rotation center. The square rod interlocking plate 52 is provided with an arc groove 521, and the center of the arc groove 521 is offset from the center of the rotating shaft by a set distance. The interlocking square rod 53 is provided with a sliding shaft 511, which passes through the arc groove 521. The grounding switch of the switchgear forms a transmission with the square rod interlocking plate 52. When the grounding switch of the switchgear closes or opens, it drives the square rod interlocking plate 52 to rotate. Under the rotation of the square rod interlocking plate 52, the relative cooperation between the arc groove 521 and the sliding shaft 511 can drive the lifting and lowering of the interlocking square rod 53. By fixing the rotation angle of the square rod interlocking plate 52, the height position of the interlocking square rod 53 can be set.

[0059] The base plate 11 of the mechanism has a slot 113. A protruding part 531 protrudes from the middle of the interlocking rod 53. When closing the circuit, the interlocking rod 53 moves downwards, causing the protruding part 531 to enter the slot 113. When opening the circuit, the interlocking rod 53 moves upwards, causing the protruding part 531 to disengage from the slot 113. The base plate 11 of the mechanism also has a rocker wheel baffle 6. (Refer to...) Figure 14 The rocker baffle 6 is slidably connected to the base plate 11 of the mechanism so that the rocker baffle 6 can move horizontally between the blocking position and the open position. A baffle return spring 62 is provided between the rocker baffle 6 and the base plate 11 of the mechanism. The baffle return spring 62 keeps the rocker baffle 6 in the blocking position when it is not subjected to other external forces.

[0060] The front end of the base plate 11 of the mechanism is provided with a handle through hole 112 that is coaxial with the oscillating wheel. The handle needs to pass through the handle through hole 112 to connect with the oscillating wheel. The oscillating wheel baffle 6 is provided with a clearance opening 61. When the oscillating wheel baffle 6 is in the blocking position, the clearance opening 61 is offset from the handle through hole 112 and is not connected, so that the handle cannot be inserted into the handle through hole 112 at this time. The unlocking push plate 22 is provided with a sloping groove 223. The end of the oscillating wheel baffle 6 goes deep into and abuts against the sloping groove 223. When the unlocking push plate 22 is pressed to unlock the side lock plate 23, the movement of the unlocking push plate 22 causes the inclined surface of the sloping groove 223 to push the oscillating wheel baffle 6 to move to the open position, so that the clearance opening 61 is connected to the handle through hole 112 at this time, and the handle can be inserted to operate the hand crank screw 31.

[0061] Furthermore, when the crank baffle 6 is in the blocking position, the clearance opening 61 is connected to the slot 113. When the circuit is closed, the protrusion 531 simultaneously enters the slot 113 and the clearance opening 61, blocking the crank baffle 6 so that it cannot move to the open position. Consequently, the unlocking push plate 22 cannot be pressed into the unlocking side lock plate 23, thus preventing unlocking when the circuit is closed. When the circuit is opened, the protrusion 531 exits the slot 113. When the crank baffle 6 is in the open position and the crank handle can be operated, the clearance opening 61 and the slot 113 are offset and block the slot 113. At this time, the protrusion 531 cannot enter the slot 113, and the circuit cannot be closed.

[0062] Furthermore, a micro switch 27 is also provided on the fixed frame 21, a contact spring 28 is provided on the mechanism base plate 11, and an opening 224 for the contact spring 28 to pass through is provided on the unlocking push plate 22. When the unlocking push plate 22 moves horizontally, it will abut against the contact spring 28 and drive it to bend. The contact on the micro switch 27 is abutted against the end of the unlocking spring. Then, when the unlocking push plate 22 is pressed to switch the side lock plate 23 to the unlock position, the contact spring 28 abuts against the pressing contact and triggers the micro switch 27.

[0063] To indicate the operator's precise location of the drawer within the switch cabinet, a position indicator component is also provided, as shown in the reference... Figure 13 The system includes an indicator guide spring 43, an indicator guide post 42, and an indicator rod 4. The indicator rod 4 passes through the lock nut 35 and can rotate relative to the lock nut 35 with its own axis as the center, and can also move relative to the lock nut 35 along its own axis. Furthermore, one end of the indicator rod 4 is rotatably connected to the base plate 11 of the mechanism through a bearing, and the other end passes forward through the front end of the base plate 11 of the mechanism. The lock nut 35 has a through hole for the indicator guide post 42 to pass through. The indicator guide post 42 is perpendicular to the indicator rod 4. A spiral groove 41 is formed on the outer periphery of the indicator rod 4 along the axis. One end of the indicator guide post 42 extends into the spiral groove 41 to form a fit. The other end of the indicator guide post 42 is provided with an indicator guide spring 43. The indicator guide spring 43 provides axial elastic force to the indicator guide post 42, so that the end of the indicator guide post 42 is kept in the spiral groove 41.

[0064] The front end of the indicator rod 4 is provided with a circumferential indicator mark. During the movement of the mechanism base plate 11, the movement of the lock nut 35 relative to the mechanism base plate 11 causes the indicator guide post 42 to move axially relative to the indicator rod 4. With the action of the indicator guide spring 43, the indicator rod 4 is driven to rotate through the cooperation of the indicator guide post 42 and the spiral groove 41. Thus, the circumferential indication change of the indicator mark at the end of the indicator rod 4 can reflect the change in the moving position of the mechanism base plate 11, thereby realizing the indication of the current position of the mechanism base plate 11.

[0065] Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort should fall within the protection scope of this utility model.

Claims

1. A hand-cranked three-position locking and pushing mechanism for a switch cabinet drawer, characterized in that, The device includes a partition and a base plate that moves on the partition. A side locking plate is movably mounted on the base plate along a predetermined direction. The side locking plate has two positions during movement: a locked position for locking and unlocking the drawer. Multiple top blocks are mounted on the side locking plate along the drawer's movement direction. A hand-cranked screw and a lock nut are mounted on the base plate. The hand-cranked screw is axially aligned with the drawer's movement direction and is rotatably connected to the base plate. The lock nut is threadedly connected to the hand-cranked screw. A limiting area is provided on the partition for engaging and limiting the lock nut. Multiple locking grooves are sequentially formed on the outer wall of the hand-cranked screw along its axial direction. A screw locking post is movably mounted on the lock nut. When the side locking plate is in the locked position, the top blocks abut against the screw locking post and drive the screw locking post into one of the locking grooves to lock the hand-cranked screw.

2. The hand-cranked three-position locking and pushing mechanism for a switch cabinet drawer according to claim 1, characterized in that, The base plate of the mechanism has a straight groove for the lock nut to pass through and move. The bottom of the lock nut is provided with a collision post. A lock block fixing plate is fixedly provided on the partition. A left lock block and a right lock block are symmetrically arranged inside the lock block fixing plate. A left top spring and a right top spring are respectively provided between the left lock block and the right lock block and the inner wall of the lock block fixing plate. The left lock block and the right lock block abut against each other to form the limiting area for locking the collision post.

3. The hand-cranked three-position locking and pushing mechanism for a switch cabinet drawer according to claim 2, characterized in that, The bottom of the mechanism base plate is provided with a latch, which includes a left stop and a right stop for abutting against the outer side of the left locking block and the outer side of the right locking block, respectively. The left stop and the right stop are arranged along the axial direction of the hand crank screw and are parallel to each other.

4. The hand-cranked three-position locking and pushing mechanism for a switch cabinet drawer according to claim 2, characterized in that, The collision post is hinged with a lead screw rear locking block. A rear push spring is provided between the lead screw rear locking block and the collision post for compression when the lead screw rear locking block abuts against the inner wall of the limiting area. The hand-cranked lead screw has an extraction locking groove for the end of the lead screw rear locking block to enter. The two side walls of the extraction locking groove abut against the lead screw rear locking block to limit the rotational direction of the hand-cranked lead screw.

5. The hand-cranked three-position locking and pushing mechanism for a switch cabinet drawer according to claim 1, characterized in that, A fixed plate is fixedly mounted on the base plate of the mechanism. A side locking plate and an unlocking push plate pass through the fixed plate. A first spring is provided between the unlocking push plate and the fixed plate. A locking rod is provided on the side locking plate. A sliding groove for the locking rod to pass through is provided on the unlocking push plate. The sliding groove forms a set acute angle with the moving direction of the side locking plate. A three-position positioning member is provided on the partition. The three-position positioning member has multiple opening slots for accommodating the locking rod. The multiple opening slots are spaced apart along the drawer's moving direction. A side locking hole is provided on the side locking plate for a side locking pin to pass through. The side locking hole includes a narrow hole for axially limiting the side locking pin and a hole for moving along the side locking plate. The expansion hole of the side lock pin is limited in the direction of movement. The narrow hole communicates with the expansion hole. The side lock pin is provided with a columnar part and a waisted part in sequence along the axial direction. The outer diameter of the waisted part is smaller than the outer diameter of the columnar part. The outer diameter of the columnar part is slightly smaller than the inner diameter of the expansion hole and larger than the inner diameter of the narrow hole. The outer diameter of the waisted part is smaller than the inner diameter of the narrow hole. The three-position positioning member also includes a plurality of bosses and grooves that are alternately connected along the drawer movement direction. One end of the side lock pin abuts against the surface of the boss or the groove. The other end is provided with a second spring that provides elastic force to the side lock pin toward the three-position positioning member. The opening slot and the groove are aligned perpendicular to the drawer movement direction.

6. The hand-cranked three-position locking and pushing mechanism for a switch cabinet drawer according to claim 5, characterized in that, It also includes a slider, a third spring is provided between the slider and the three-position positioning component, and the slider is respectively provided with a first stop block located in the opening slot and a second stop block located in the groove.

7. The hand-cranked three-position locking and pushing mechanism for a switch cabinet drawer according to claim 1, characterized in that, It also includes a position indicator component, which includes an indicator rod that passes through the lock nut and is rotatably connected to the base plate of the mechanism. The outer periphery of the indicator rod is provided with a spiral groove along the axial direction. An indicator guide post passes through the lock nut. One end of the indicator guide post is connected to the spiral groove, and the other end is provided with an indicator guide spring for the indicator guide post to extend into the spiral groove. An indicator mark is provided at the end of the indicator rod.

8. A hand-cranked three-position locking and pushing mechanism for a switch cabinet drawer according to claim 5, characterized in that, It also includes a square rod support, on which a chain square rod is movably inserted. A square rod chain plate is connected to the square rod support via a rotating shaft. An arc groove is formed on the square rod chain plate. One end of the chain square rod is provided with a sliding shaft for passing through the arc groove. The rotation of the square rod chain plate drives the lifting and lowering of the chain square rod. The front end of the partition is provided with a flange for abutting against the lower end of the chain square rod.

9. A hand-cranked three-position locking and pushing mechanism for a switch cabinet drawer according to claim 8, characterized in that, A rocker wheel baffle is provided on the base plate of the mechanism. The rocker wheel baffle slides with the base plate of the mechanism to move between a blocked position and an open position. An avoidance opening is provided on the rocker wheel baffle. A crank handle through hole is provided on the base plate of the mechanism. In the blocked position and the open position, the avoidance opening is offset from and communicates with the crank handle through hole, respectively. An inclined groove is provided on the unlocking push plate. One end of the rocker wheel baffle extends into and abuts against the inclined groove. A protrusion is provided on the interlocking square rod. A slot is provided on the base plate of the mechanism for the protrusion to enter under the lifting action of the interlocking square rod. In the blocked position, the avoidance opening communicates with the slot.

10. A hand-cranked three-position locking and pushing mechanism for a switch cabinet drawer according to claim 5, characterized in that, The base plate of the mechanism is also provided with a micro switch and a contact spring. The unlocking push plate has an opening for the contact spring to pass through. One end of the contact spring is connected to the base plate of the mechanism, and the other end abuts against the contact of the micro switch.

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