Switch cabinet drawer hand-pull propulsion mechanism

Abstract

The invention discloses a switch cabinet drawer hand-pull pushing mechanism which comprises a partition plate and a mechanism bottom plate which is pushed and pulled to move on the partition plate, the mechanism bottom plate is movably provided with an unlocking push plate and a side lock plate, the side lock plate is provided with a lock rod, the unlocking push plate is provided with a sliding groove for the lock rod to penetrate through, and the unlocking push plate and the side lock plate are movably arranged in the sliding groove. A set acute angle is formed between the sliding groove and the moving direction of the side locking plate; the partition plate is provided with a three-station positioning block, the three-station positioning block is provided with an opening groove used for containing the lock rod, and the side lock plate is provided with a side lock hole used for allowing the side lock column to penetrate through. According to the invention, a multi-opening groove of the three-station positioning block is matched with the lock rod driven by the side lock plate to realize multi-position accurate locking of the drawer at multiple locking points, and the locking structure of the three-station positioning block and the lock rod is independent of a connecting structure between the drawer and the switch cabinet and is not influenced by the heavy self-weight of the drawer, so that the service life is effectively ensured, and the safety of the switch cabinet is improved. And an accurate locking position is ensured.

Description

Technical Field

[0001] The invention belongs to the field of low-voltage switchgear and relates to a switch cabinet drawer hand-pull propulsion mechanism. Background Art

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

[0003] During operation of existing switch cabinets, the drawers have multiple working positions inside the switch cabinet to adapt to different testing tasks. Since the connection precision requirements of high-current equipment are high, the user has very high requirements for the drawer position when pushing and pulling the drawer out of the switch cabinet. However, due to the large number of components, the weight of the drawer is generally around tens of kilograms. The user's operation and control of the drawer will be affected by various factors, such as the impact of the drawer's own weight on the positioning and locking structure, the inertia caused by excessive weight, etc. The traditional positioning and locking structure is difficult to bear heavy loads, and is prone to deformation, tooth jumping, thread disengagement and damage in long-term use. All these lead to the user's inaccurate grasp of the drawer position, the drawer switching operation between multiple positions is not smooth, and it is difficult to lock in multiple positions. Summary of the Invention

[0004] In order to overcome the deficiencies of the prior art, the present invention provides a switch cabinet drawer hand-pull propulsion mechanism.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A switch cabinet drawer manual pushing mechanism comprises a partition and a mechanism bottom plate that is pushed and pulled on the partition, wherein the mechanism bottom plate is movably provided with an unlocking push plate and a side lock plate, the side lock plate is provided with a locking rod, the unlocking push plate is provided with a sliding groove for the locking rod to pass through, the sliding groove forms a set acute angle with the movable direction of the side lock plate; a three-position positioning block is provided on the partition, the three-position positioning block is provided with an opening groove for accommodating the locking rod, the side lock plate is provided with a side lock hole for passing through the side lock column, and the side lock hole includes a A narrow hole for axially limiting the side lock column, and an expanded hole for limiting the side lock column along the movable direction of the side lock plate, the narrow hole is connected to the expanded hole, the three-station positioning block also includes a plurality of bosses and grooves arranged alternately in sequence, one end of the side lock column abuts against the surface of the boss or the groove, and also includes a slider, a third spring is provided between the slider and the three-station positioning block, and the slider is respectively provided with a first stop block located in the open groove and a second stop block located in the groove, and the surface of the second stop block is flush with the top of the boss.

[0007] Furthermore, the plurality of opening grooves are spaced apart along the push-pull direction of the mechanism bottom plate, the bosses and the grooves are alternately connected along the push-pull direction of the mechanism bottom plate, and the opening grooves and the grooves are aligned in the push-pull direction perpendicular to the mechanism bottom plate.

[0008] Furthermore, it also includes a second spring, which provides an elastic force for the side lock column toward the three-position positioning block.

[0009] Furthermore, the side lock column is axially arranged in sequence as a columnar portion and a waisted portion, the outer diameter of the waisted portion is smaller than the outer diameter of the columnar portion, the outer diameter of the columnar portion is slightly smaller than the inner diameter of the expanded hole and larger than the inner diameter of the narrow hole, and the outer diameter of the waisted portion is smaller than the inner diameter of the narrow hole.

[0010] Furthermore, a fixing plate is fixedly provided on the bottom plate of the mechanism, the unlocking push plate is passed through the fixing plate, and a first spring is provided between the unlocking push plate and the fixing plate.

[0011] Furthermore, it also includes a position indication component, which includes a fixed rod fixedly connected to the bottom plate of the mechanism, an indication slider and a fourth spring are axially passed through the fixed rod, the two ends of the fourth spring are respectively connected to the indication slider and the fixed rod, a limit block is provided on the partition, and a collision block is provided at the bottom of the indication slider that abuts against the limit block, an indication rod is also passed through the indication slider, the indication rod is rotatably connected to the bottom plate of the mechanism, the movement of the indication slider drives the rotation of the indication rod, and an indication mark is provided on the end of the indication rod.

[0012] Furthermore, a spiral groove is axially provided on the outer periphery of the indicator rod, and an indicator guide column is passed through the indicator slider. One end of the indicator guide column is engaged with the spiral groove, and the other end is provided with a fifth spring for the indicator guide column to extend into the spiral groove.

[0013] Furthermore, it also includes a square rod bracket, a chain square rod is movably provided on the square rod bracket, a square rod chain plate is connected to the square rod bracket through a rotating shaft, an arc groove is provided 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 chain square rod to rise and fall, and the front end of the partition is provided with a flange for abutting against the lower end of the chain square rod.

[0014] Furthermore, the chain square rod is provided with a protrusion for abutting against the unlocking push plate in the movement direction of the unlocking push rod.

[0015] In summary, the present invention is beneficial in that:

[0016] The present invention adopts a multi-opening groove of a three-position positioning block and a locking rod cooperation structure driven by a side lock plate to realize multi-position precise locking of drawers with multiple locking points, and the locking structure of the three-position positioning block and the locking rod is independent of the connection structure between the drawer and the switch cabinet, and is not affected by the large dead weight of the drawer, effectively ensuring the service life and ensuring the accurate locking position; the side lock plate is provided with a side lock hole to cooperate with the side lock column to realize dual movable direction limiting, so that the side lock plate and the locking rod can realize locking and unlocking switching during movement, and the side lock plate only needs to be unlocked once to automatically lock the side lock plate in the next position. At the same time, it also supports the one-step unlocking and locking operation across multiple positions, which greatly optimizes the operation logic and convenience. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the drawer and partition of the present invention.

[0018] Figure 2 It is a structural diagram of the mechanism base plate and partition.

[0019] Figure 3 It is a structural diagram of the bottom plate part of the mechanism.

[0020] Figure 4 for Figure 3 Top view in .

[0021] Figure 5 It is a structural diagram of the unlocking push plate and side lock plate.

[0022] Figure 6 This is a structural diagram of the three-station positioning block.

[0023] Figure 7 This is a schematic diagram of the structure when the positioning component is locked in the connected position.

[0024] Figure 8 This is a schematic diagram of the structure when the positioning component is unlocked in the connection position.

[0025] Figure 9 It is a structural diagram of the position indication component.

[0026] Figure 10 for Figure 3 Front view in.

[0027] Figure 11 It is a structural diagram of the interlocking square rod.

[0028] Markings in the figure: 11. Mechanism base plate; 12. Partition; 21. Fixed frame; 22. Unlocking push plate; 221. Slide groove; 23. Side lock plate; 231. Side lock hole; 24. Lock rod; 25. Side lock column; 26. Three-station positioning block; 261. Opening groove; 262. Boss; 263. Groove; 264. First stop block; 265. Second stop block; 31. Fixed rod; 32. Indicating slider; 321. Collision block; 322. Limiting block; 33. Fourth spring; 34. Indicating rod; 341. Spiral groove; 35. Indicating guide column; 41. Square rod bracket; 42. Square rod interlocking plate; 421. Arc groove; 43. Interlocking square rod; 431. Protrusion. DETAILED DESCRIPTION

[0029] The following describes the embodiments of the present invention through specific examples. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments. The details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the following embodiments and features in the embodiments can be combined with each other unless they conflict.

[0030] It should be noted that the illustrations provided in the following embodiments are merely schematic illustrations of the basic concept of the present invention. Therefore, the illustrations only show components related to the present invention and are not drawn according to the number, shape, and size of components in actual implementation. In actual implementation, the type, quantity, and proportion of each component may be arbitrarily changed, and the component layout may also be more complex.

[0031] All directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, horizontal, vertical...) are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0032] Due to installation errors and other reasons, the parallel relationship referred to in the embodiments of the present invention may actually be an approximately parallel relationship, and the perpendicular relationship may actually be an approximately perpendicular relationship.

[0033] A switch cabinet drawer manual pull-pushing mechanism is provided in the switch cabinet and is used for pushing and pulling the drawer inward and outward relative to the switch cabinet. Figure 1The drawer hand-pushing mechanism includes a partition 12 arranged in the switch cabinet and a mechanism bottom plate 11 arranged on the partition 12. Electrical components are arranged on the mechanism bottom plate 11, and contacts for connecting with the electrical components are arranged in the switch cabinet. A slide rail is arranged on the partition 12. The mechanism bottom plate 11 is connected to the slide rail so that the mechanism bottom plate 11 can be translated along the slide rail on the partition 12 to achieve advancement and pulling relative to the switch cabinet. In addition, the mechanism bottom plate 11 has three specific position states relative to the switch cabinet during the pushing and pulling process, including a connection position, a test position and an isolation position, and the positional relationship of the connection position, the test position and the isolation position is arranged in sequence from the inside of the switch cabinet to the outside. The three positions represent three states: the drawer electrical components are connected to the switch cabinet with a large current, the drawer electrical components are connected to the switch cabinet with a small current, and the drawer electrical components are disconnected from the switch cabinet.

[0034] A positioning assembly and a position indicating assembly are provided on the mechanism base plate 11 . The positioning assembly is used for positioning and locking the mechanism base plate 11 in three position states, and the position indicating assembly is used for indicating the current position of the mechanism base plate 11 .

[0035] Reference Figures 2 to 6 The positioning assembly includes a three-position positioning block 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 mounted on the mechanism bottom plate 11 by welding or bolting. A first slot for passing the unlocking push plate 22 and allowing the unlocking push plate 22 to reciprocate along the first direction is opened on the fixing frame 21. A second slot for passing the side locking plate 23 and allowing the side locking plate 23 to reciprocate along the second direction is also opened on the fixing frame 21. Preferably, the first direction and the second direction are connected. The direction is vertical, the locking rod 24 is fixedly connected to the side lock plate 23, and a sliding groove 221 is opened on the unlocking push plate 22 along the third direction. The locking rod 24 is inserted into the sliding groove 221 and can move horizontally along the third direction in the sliding groove 221. By setting the third direction of the sliding groove 221 to form an acute angle with the first direction and the second direction respectively, when the unlocking push plate 22 is translated along the first direction, the sliding groove 221 will generate a force on the locking rod 24 to drive the side lock plate 23 to translate along the second direction.

[0036] The three-station positioning block 26 is set on the partition 12 and is fixedly connected to the partition 12. The lower end of the lock rod 24 passes through the mechanism bottom plate 11 and extends toward the partition 12. The three-station positioning block 26 is provided with a plurality of opening grooves 261 for engaging with the lower end of the lock rod 24. The opening grooves 261 are U-shaped opening structures. The plurality of opening grooves 261 are distributed in sequence at set intervals along the push-pull direction of the mechanism bottom plate 11. The two moving position ends of the side lock plate 23 and the lock rod 24 in the second direction are respectively the locking position and the unlocking position. When in the unlocking position, The locking rod 24 is located on the outside of the opening groove 261. When the mechanism base plate 11 is pushed or pulled, the locking rod 24 does not contact the three-position positioning block 26, so that the mechanism base plate 11 can be switched between the connection position, the test position and the isolation position. When in the locked position, the locking rod 24 can enter any of the opening grooves 261. The locking rod 24 is restricted by the opening grooves 261 so that the mechanism base plate 11 cannot be pushed or pulled, thereby achieving a locking effect. The positions of the locking rod 24 in the three opening grooves 261 correspond to the connection position, the test position and the isolation position of the mechanism base plate 11 respectively.

[0037] A first spring is provided between the unlocking push plate 22 and the fixing frame 21. The first spring provides an elastic force in a first direction to the unlocking push plate 22. When there is no other external force, the first spring provides an elastic force to maintain the unlocking push plate 22 and the side lock plate 23 toward the locked position. When the unlocking push plate 22 is pushed to keep compressing the first spring, it can be maintained in the unlocked position.

[0038] In order to optimize the operating experience, the positioning assembly also includes a side lock column 25, which is connected to the fixing frame 21 through a second spring. The second spring provides a downward elastic force to the side lock column 25 toward the partition 12. The lower half of the side lock column 25 is set to a conical structure for contacting the three-station positioning block 26. The upper half of the side lock column 25 is sequentially provided with a columnar portion and a waisted portion along the axial direction. The outer diameter of the waisted portion is smaller than the outer diameter of the columnar portion. A side lock hole 231 is opened on the side lock plate 23, and the side lock hole 231 includes an expanded hole and a narrow hole distributed and connected in sequence along the second direction. The connecting part of the expanded hole and the narrow hole can allow the waist portion of the side lock column 25 to pass through. The inner diameter of the expanded 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 waist portion and smaller than the outer diameter of the columnar portion. The side lock column 25 is arranged in the expanded hole. When the side lock column 25 moves axially, when the columnar portion and the side lock hole 231 are at the same horizontal position, the side lock plate 23 is supported by the columnar portion and cannot move in the second direction. When the waist portion and the side lock hole 231 are at the same horizontal position, the side lock plate 23 can move in the second direction to make the waist portion move between the narrow hole and the expanded hole.

[0039] Correspondingly, a wave structure is provided on the three-station positioning block 26, which includes a plurality of bosses 262 and grooves 263 alternately arranged in sequence along the push-pull direction of the mechanism base plate 11. Adjacent bosses 262 and grooves 263 are connected by slopes, and the plurality of grooves 263 are respectively aligned with the plurality of opening grooves 261 in the direction perpendicular to the push-pull direction.

[0040] When the mechanism base plate 11 is in any of the connection position, test position, and isolation position, and the side lock plate 23 is in the locked position, the waist of the side lock column 25 is located in the narrow hole of the side lock plate 23, and the axial movement of the side lock column 25 is limited by the narrow hole. Figure 7 When the bottom plate 11 of the mechanism is to be pushed in or pulled out, the unlocking push plate 22 needs to be operated first to move horizontally, driving 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 column 25, so that the side lock column 25 is located in the expanded hole, and then the side lock column 25 is axially moved toward the three-position positioning block 26 by the elastic force of the second spring, so that the columnar portion and the side lock hole 231 are at the same horizontal position, and then the side lock column 25 presses the side lock plate 23, maintaining the side lock plate 23 in the unlocked position, so that the bottom plate 11 of the mechanism can perform the pushing and pulling operation.

[0041] When the operating mechanism base plate 11 moves and switches from one position to another adjacent position, the side lock plate 23 and the side lock column 25 in the unlocked position are synchronously translated under the drive of the mechanism base plate 11, and the end of the tapered structure at the bottom end of the side lock column 25 comes into contact with the wave structure. The bottom end of the side lock column 25 starts from the low end of the wave structure or the bottom of the groove 263 and moves toward the top of the adjacent boss 262. During the movement, the side lock column 25 produces an upward axial displacement, so that the columnar portion disengages from the side lock hole 231, and the waist portion enters the side lock hole 231, and then the side lock plate 23 is limited in the second direction. When unlocked, the mechanism base plate 11 moves further, and the bottom of the side lock column 25 moves from the top of the boss 262 to the bottom of the adjacent groove 263. During the movement, the bottom of the lock rod 24 approaches the position of the opening groove 261 corresponding to the groove 263. Under the action of the first spring, the lock rod 24 enters the opening groove 261 and the waist of the side lock column 25 enters the narrow hole, so that the side lock plate 23 switches to the locked position, and the unlocking push plate 22 pops up and resets. At this time, the mechanism base plate 11 completes the movement and switching from any one of the connection position, test position, and isolation position to another adjacent position.

[0042] To sum up, when the mechanism base plate 11 is performing a position movement switching action, it only needs to click the unlock push plate 22 once to operate the mechanism base plate 11 to move to complete the switching. There is no need to keep pressing the unlock push plate 22 while operating the mechanism base plate 11 to move, which greatly simplifies the operation and improves the operation safety and enhances the operation experience.

[0043] Furthermore, in order to provide the mechanism base plate 11 with the function of directly switching from the isolation position to the connection position, a slider is also provided on the three-station positioning block 26, and a first stop block 264 and a second stop block 265 are respectively provided on the slider, wherein the first stop block 264 is located in the opening groove 261 corresponding to the connection position, for blocking the opening of the opening groove 261, and the second stop block 265 is located in the groove 263 corresponding to the connection position, and the top of the second stop block 265 is flush with the top of the adjacent boss 262, and the slider and the three-station positioning block 26 are movably connected by a third spring, so that the slider can move within a set range relative to the three-station positioning block 26, and when not affected by other external forces, the first stop block 264 is maintained in the opening position blocking the opening groove 261, and the second stop block 265 is maintained in the position connected with the adjacent boss 262.

[0044] When the mechanism bottom plate 11 is to be moved directly from the isolation position to the connection position, the unlocking push plate 22 is continuously pressed to keep the side lock plate 23 and the lock rod 24 in the unlocked position. At this time, the side lock column 25 is located in the expanded hole, and the mechanism bottom plate 11 is pushed to make the side lock column 25 continuously pass through the wave structure without contacting the side lock plate 23. At this time, the mechanism bottom plate 11 can be moved directly from the isolation position to the connection position. After the mechanism bottom plate 11 moves to the connection position, the bottom end of the side lock column 25 abuts against the top of the second stopper 265, so that the waist of the side lock column 25 is at the same horizontal position as the side lock hole 231. Figure 8 At this time, the pressing effect on the unlocking push plate 22 is released, so that the unlocking push plate 22 rebounds and returns to its original position under the action of the first spring, driving the side lock plate 23 to move to the locked position, the waist of the side lock column 25 enters the narrow hole, and the lock rod 24 enters the open groove 261, completing the locking action, and synchronously, the lock rod 24 pushes the first stopper 264 during the movement into the open groove 261, and the movement of the slider causes the second stopper 265 to move and disengage from the bottom end of the side lock column 25, leaving the bottom end of the side lock column 25 vacant, and then the operation of clicking the unlocking push plate 22 to unlock and move the mechanism base plate 11 to switch positions can be continued.

[0045] In order to avoid the safety risk caused by the accidental excessive pulling out of the mechanism base plate 11, refer to Figure 10 and Figure 11 A square rod bracket 41 and a chain square rod 43 are also provided on the mechanism base plate 11. The chain square rod 43 is provided on the square rod bracket 41 and passes downward through the mechanism base plate 11. The chain square rod 43 can move vertically so that its lower end can contact the partition 12 downward. The front end of the partition 12 is provided with a raised portion such as a flange or a step. When the chain square rod 43 is in the downward position, the chain square rod 43 will be pressed against the flange or step forward when the mechanism base plate 11 is pulled out, so that the mechanism base plate 11 cannot be further pulled out, thereby ensuring safety.

[0046] A square rod locking plate 42 is provided on the square rod bracket 41, and the square rod locking plate 42 is connected to the square rod bracket 41 through a rotating shaft, so that the square rod locking plate 42 can rotate relative to the square rod bracket 41 along the rotating shaft as the rotation center. An arc groove 421 is provided on the square rod locking plate 42, and the center of the arc groove 421 is offset by a set distance relative to the center of the rotating shaft. A sliding shaft is provided on the chained square rod 43, and the sliding shaft is passed through the arc groove 421. Then, under the rotation action of the square rod locking plate 42, the relative cooperation relationship between the arc groove 421 and the sliding shaft can drive the lifting action of the chained square rod 43. By fixing the rotation angle of the square rod locking plate 42, the height position of the chained square rod 43 can be set.

[0047] The locking square rod 43 is also provided with a protrusion 431 protruding toward the unlocking push plate 22. When the locking square rod 43 presses downward against the partition 12, the protrusion 431 presses against the unlocking push plate 22 in the first direction, preventing the movement of the unlocking push plate 22, so that the side lock plate 23 cannot move to the unlocking position.

[0048] Reference Figure 2 、 Figure 3 、 Figure 4 and Figure 9 The position indicating assembly includes a fixed rod 31, a fourth spring 33, an indicating slider 32, an indicating guide column 35 and an indicating rod 34. The fixed rod 31 is fixedly connected and installed with the mechanism base plate 11. The indicating slider 32 is sleeved on the fixed rod 31 and can move relative to the axial direction of the fixed rod 31. The bottom of the mechanism base plate 11 is slotted, and a collision block 321 is provided at the bottom of the indicating slider 32. The collision block 321 passes downward through the mechanism base plate 11 through the slot and extends toward the partition 12. The axial direction of the fixed rod 31 is set in the same direction as the push-pull direction of the mechanism base plate 11. A limiting block 322 is provided on the partition 12. During the push-pull movement of the mechanism base plate 11, the collision block 321 can contact the limiting block 322.

[0049] The indicator rod 34 is arranged on one side of the fixed rod 31 and is parallel to the fixed rod 31. The indicator rod 34 is passed through the indicator slider 32, and the indicator rod 34 can rotate relative to the indicator slider 32 with its own axis as the center. Furthermore, one end of the indicator rod 34 is rotatably connected to the mechanism base plate 11 through a bearing, and the other end is passed forward through the front end of the mechanism base plate 11. A through hole for passing an indicator guide column 35 is provided on the indicator slider 32. The indicator guide column 35 is perpendicular to the indicator rod 34. A spiral groove 341 is axially provided on the outer periphery of the indicator rod 34. One end of the indicator guide column 35 extends into the spiral groove 341 to form a fit. A fifth spring is provided at the other end of the indicator guide column 35. The fifth spring provides axial elastic force to the indicator guide column 35, so that the end of the indicator guide column 35 remains in the spiral groove 341.

[0050] A circumferential indicating mark is provided at the front end of the indicating rod 34. When the mechanism base plate 11 moves, the collision block 321 of the indicating slider 32 is abutted by the limiting block 322, and the fourth spring 33 acts to move the indicating slider 32 relative to the mechanism base plate 11, thereby driving the indicating guide column 35 to move axially relative to the indicating rod 34. The indicating guide column 35 cooperates with the spiral groove 341 to drive the indicating rod 34 to rotate, and the circumferential indicating change of the indicating mark at the end of the indicating rod 34 can be reflected as the moving position change of the mechanism base plate 11, thereby realizing the indication of the current position of the mechanism base plate 11.

[0051] Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of the present invention.

Claims

1. A switch cabinet drawer manual push mechanism, characterized in that: The invention comprises a partition (12) and a mechanism base plate (11) which is pushed and pulled on the partition (12); an unlocking push plate (22) and a side lock plate (23) are movably provided on the mechanism base plate (11); a locking rod (24) is provided on the side lock plate (23); a sliding groove (221) for the locking rod (24) to pass through is provided on the unlocking push plate (22); the sliding groove (221) forms a set acute angle with the movable direction of the side lock plate (23); a three-station positioning block (26) is provided on the partition (12); an opening groove (261) for accommodating the locking rod (24) is provided on the three-station positioning block (26); a side lock hole (231) for passing the side lock column (25) is provided on the side lock plate (23); the side lock hole (231) includes The invention relates to a three-station positioning block (26) comprising a narrow hole for axially limiting the side lock column (25) and an expanded hole for limiting the side lock column (25) along the movable direction of the side lock plate (23), wherein the narrow hole is connected to the expanded hole, and the three-station positioning block (26) further comprises a plurality of bosses (262) and grooves (263) arranged alternately in sequence, wherein one end of the side lock column (25) abuts against the surface of the boss (262) or the groove (263), and further comprises a slider, wherein a third spring is arranged between the slider and the three-station positioning block (26), and the slider is respectively provided with a first stopper (264) located in the opening groove (261) and a second stopper (265) located in the groove (263), wherein the surface of the second stopper (265) is flush with the top of the boss (262).

2. A switch cabinet drawer manual pull-and-pull mechanism according to claim 1, characterized in that: The plurality of opening grooves (261) are spaced apart along the push-pull direction of the mechanism bottom plate (11); the bosses (262) and the grooves (263) are alternately connected along the push-pull direction of the mechanism bottom plate (11); and the opening grooves (261) and the grooves (263) are aligned in a direction perpendicular to the push-pull direction of the mechanism bottom plate (11).

3. A switch cabinet drawer manual push mechanism according to claim 2, characterized in that: It also includes a second spring, which provides elastic force to the side lock column (25) toward the three-station positioning block (26).

4. A switch cabinet drawer manual push mechanism according to claim 3, characterized in that: The side lock column (25) is sequentially provided with a columnar portion and a waisted portion along the axial direction, the outer diameter of the waisted portion is smaller than the outer diameter of the columnar portion, the outer diameter of the columnar portion is slightly smaller than the inner diameter of the expanded hole and larger than the inner diameter of the narrow hole, and the outer diameter of the waisted portion is smaller than the inner diameter of the narrow hole.

5. The switch cabinet drawer manual pulling and pushing mechanism according to claim 1, characterized in that: A fixed plate is fixedly provided on the mechanism bottom plate (11), the unlocking push plate (22) is passed through the fixed plate, and a first spring is provided between the unlocking push plate (22) and the fixed plate.

6. The switch cabinet drawer manual pull-and-pull mechanism according to claim 1, characterized in that: The invention also includes a position indicating assembly, which includes a fixed rod (31) fixedly connected to the mechanism base plate (11), an indicating slider (32) and a fourth spring (33) axially penetrated on the fixing rod (31), and two ends of the fourth spring (33) are respectively connected to the indicating slider (32) and the fixing rod (31), a limiting block (322) is provided on the partition (12), a collision block (321) abutting against the limiting block (322) is provided at the bottom of the indicating slider (32), an indicating rod (34) is also penetrated on the indicating slider (32), the indicating rod (34) is rotatably connected to the mechanism base plate (11), the movement of the indicating slider (32) drives the rotation of the indicating rod (34), and an indicating mark is provided on the end of the indicating rod (34).

7. A switch cabinet drawer manual push mechanism according to claim 6, characterized in that: A spiral groove (341) is formed on the outer periphery of the indicating rod (34) along the axial direction, and an indicating guide column (35) is passed through the indicating slider (32). One end of the indicating guide column (35) is connected to the spiral groove (341), and the other end is provided with a fifth spring for the indicating guide column (35) to extend into the spiral groove (341).

8. The switch cabinet drawer manual pulling and pushing mechanism according to claim 5, characterized in that: The utility model further comprises a square rod bracket (41), wherein a chain square rod (43) is movably provided on the square rod bracket (41), a square rod chain plate (42) is connected to the square rod bracket (41) via a rotating shaft, an arc groove (421) is provided on the square rod chain plate (42), one end of the chain square rod (43) is provided with a sliding shaft for passing through the arc groove (421), the rotation of the square rod chain plate (42) drives the chain square rod (43) to rise and fall, and the front end of the partition plate (12) is provided with a flange for abutting against the lower end of the chain square rod (43).

9. A switch cabinet drawer manual pull-and-pull mechanism according to claim 8, characterized in that: The locking square rod (43) is provided with a protrusion (431) for abutting against the unlocking push plate (22) in the action direction of the unlocking push rod.

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