A contact propulsion mechanism for use in a drawer-type switch cabinet

Abstract

The present invention discloses a contact propulsion mechanism for use in a drawer-type switch cabinet, and relates to the technical field of switch cabinet accessories, comprising two mounting seats, the two mounting seats being vertically slidably arranged, the two mounting seats being fixed with contacts, and the vertical positions of the two mounting seats being staggered; a pushing assembly, the two mounting seats being installed on the pushing assembly, and when the pushing assembly moves laterally, the two mounting seats are pushed to move vertically; a square tube, the square tube being fixed to one side of the pushing assembly; a driving assembly, the driving assembly being installed on the switch cabinet, and the inner end of the driving assembly being slidably connected to the square tube, and the driving assembly being used to push the pushing assembly to move laterally. When a fire occurs in the switch cabinet, the present invention can automatically switch the two contacts to a separated state, ensuring that the power can be cut off at the first time, so as to ensure the safety of the operators in the process of firefighting, without the need for manual disconnection.

Description

Technical Field

[0001] The invention relates to the technical field of switch cabinet accessories, and in particular to a contact propulsion mechanism used in a drawer-type switch cabinet. Background Art

[0002] Drawer-type switch cabinet is a closed switchgear with a high protection level. Its structure adopts a closed shell made of steel plates. The electrical components of the incoming and outgoing line circuits are installed in a removable component to complete a certain power supply or distribution function. The drawer-type switch cabinet eliminates the common knife switch, reduces the total space consumed by the installation of accessories, and connects more circuits in the cabinet. At the same time, if the drawer type is selected with the same specifications, the prepared drawer can be replaced in the event of a sudden failure, avoiding a relatively long period of power outage. The drawer-type switch cabinet has high reliability, safety and interchangeability, and is suitable for places with high requirements for power supply reliability.

[0003] The contacts in the drawer-type switch cabinet are the key components of the power switchgear, and are mainly used to connect and disconnect the primary circuit (main circuit) and the secondary circuit (control circuit). Whether the contact is good directly affects the operating stability and safety of the equipment. In the drawer-type switch cabinet, the contacts are generally set with working position (connection position), test position and isolation position, and their main functions are to achieve work, test and separation.

[0004] A Chinese patent with authorization announcement number CN110364951B discloses a contact propulsion mechanism for use in a drawer-type switch cabinet. Although the patent has the beneficial effect of "only one operating tool is needed to adjust the isolation position, test position and working position of the contact state of the drawer-type switch cabinet, which is labor-saving and efficient, and the design of the locking mechanism provides better safety."

[0005] Drawer-type switch cabinets may overheat or even spontaneously combust in extreme cases due to certain faults or abnormal conditions, such as overload, poor contact, insulation damage, mechanical failure, etc. When the switch cabinet spontaneously combusts, the primary emergency measure is to immediately cut off the power supply to prevent the spread of fire and further electrical failures. The above-mentioned patent does not have the function of automatically disconnecting the contacts when the switch cabinet catches fire, and the contacts need to be manually disconnected after the fire occurs. Summary of the invention

[0006] The object of the present invention is to provide a contact propulsion mechanism for a drawer-type switch cabinet, which solves the problem that the contact propulsion mechanism in the existing drawer-type switch cabinet does not have the function of automatically disconnecting the contacts when the switch cabinet catches fire, and the contacts need to be disconnected manually after the fire occurs.

[0007] The present invention solves the above technical problems through the following technical solutions, which include:

[0008] Two mounting seats, the two mounting seats are vertically slidably arranged, the two mounting seats are both fixed with contacts, and the vertical positions of the two mounting seats are staggered;

[0009] A pushing assembly, the two mounting seats are both mounted on the pushing assembly, and when the pushing assembly moves laterally, the two mounting seats are pushed to move vertically;

[0010] A square tube, wherein the square tube is fixed to one side of the pushing component;

[0011] A driving assembly, wherein the driving assembly is mounted on the switch cabinet, and the inner end of the driving assembly is slidably connected to the square tube, and the driving assembly is used to push the pushing assembly to move horizontally;

[0012] A locking assembly, the locking assembly is used to switch the connection state between the square tube and the driving assembly, and the connection state between the square tube and the driving assembly includes separation and coupling;

[0013] The first liquid crystal elastic strip, the two ends of the first liquid crystal elastic strip are respectively fixed to the square tube and the driving component. When the temperature rises to the set temperature, the locking component switches the connection state between the square tube and the driving component to separation, and the first liquid crystal elastic strip contracts to drive the pushing component to move horizontally, thereby realizing the separation of the two mounting seats.

[0014] Preferably, the pushing assembly includes a pushing block, a guide groove is provided on the upper side of the pushing block, the guide groove has an inclined portion and a transverse portion connected to the inclined portion, the transverse portion is a side close to the square tube, two first rollers are rollingly arranged in the guide groove, and the two first rollers are respectively rotatably connected to two mounting seats, and the pushing block is slidably installed on the inner wall of the switch cabinet through a first slider rail structure.

[0015] Preferably, the driving assembly includes a mounting sleeve fixed to the side wall of the switch cabinet, the inner end of the mounting sleeve is slidably inserted in the inner cavity of the square tube, a rectangular inner hole is opened inside one end of the mounting sleeve, a rectangular tube is laterally slidably inserted in the rectangular inner hole, a screw is rotatably installed on the mounting sleeve, and the inner end of the screw is threadedly connected to the rectangular tube, and a screw wheel is fixed to the outer end of the screw.

[0016] Preferably, the locking assembly includes a sliding sleeve fixed to the inner end of the rectangular tube, a locking piece is vertically slidably arranged in the sliding sleeve, the upper and lower side walls of the square tube are respectively provided with a long waist hole and a positioning hole, the upper and lower ends of the locking piece are respectively inserted into the long waist hole and the positioning hole, an L-shaped rod extending to the upper side of the locking piece is fixed to the upper side wall of the rectangular tube, and a second liquid crystal elastic strip is fixed between the L-shaped rod and the locking piece.

[0017] Preferably, a butt tube is fixed to the lower side of the L-shaped rod, and the butt tube corresponds to the locking element vertically.

[0018] Preferably, the contact propulsion mechanism also includes a reset assembly, which includes a square frame, which is jointly arranged in the inner cavity of the square tube and the rectangular tube, the inner end of the square frame is connected to the square tube, and a circular push rod is fixed to the outer end of the square frame, the screw rod is provided with a circular through hole arranged along its axial direction, and the outer end of the circular push rod extends into the circular through hole.

[0019] Preferably, the lock comprises a slide rod slidably arranged in the slide sleeve, the lower end of the slide rod is slidably connected to a connecting rod, the lower end of the connecting rod is fixed with a latch block, a first spring sleeved on the connecting rod is arranged between the latch block and the slide rod, and the lower end of the slide rod is processed with an inclined surface, and the inclined surface faces one side of the driving assembly;

[0020] The inner wall of the square frame is provided with a push piece, and the push piece is used to push the locking piece into the positioning hole. A second spring is fixed between the inner side of the square frame and the inner wall of the square tube.

[0021] Preferably, the pushing piece includes an oblique abutment rod rotatably installed on the side wall of the square frame through a rotating shaft, a torsion spring is arranged between the rotating shaft and the square frame, the torsion spring applies a force to the oblique abutment rod to flip upward, an extension rod is fixed to the lower end of the oblique abutment rod, and a block fixed to the side wall of the square frame is arranged on the lower side of the extension rod, a vertical opening is opened on the side of the sliding sleeve close to the pushing piece, and a second roller extending from the opening is rotatably installed on the side wall of the sliding rod.

[0022] Preferably, the vertical cross-section of the stop block is a triangular structure, and the bottom of the stop block is horizontally arranged.

[0023] Preferably, the mounting seat is slidably mounted on the inner wall of the switch cabinet through a second slider rail structure.

[0024] Compared with the prior art, the beneficial effects of the present invention are:

[0025] 1. When a fire occurs in the switch cabinet, the present invention can automatically switch the two contacts to a separated state, ensuring that the power can be cut off immediately to ensure the safety of the operators during the firefighting process without manual disconnection;

[0026] 2. In the present invention, the connection relationship between the square tube and the rectangular tube of the driving assembly can be reset by the reset assembly, even if the two are in a coupled connection state, which brings convenience to the operator. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0028] Figure 2 for Figure 1 A schematic diagram of a half-section structure;

[0029] Figure 3 for Figure 1 A schematic diagram of a partial main cross-sectional structure;

[0030] Figure 4 is a schematic diagram of the three-dimensional structure of the reset;

[0031] Figure 5 is a schematic diagram of the three-dimensional structure of the locking component;

[0032] Figure 6 It is a schematic diagram of the main cross-sectional structure of the lock.

[0033] The numbers in the figure represent:

[0034] 1-contact; 11-mounting seat; 12-second slider rail structure; 2-pushing assembly; 21-pushing block; 22-guide groove; 23-first slider rail structure; 24-first roller; 3-switch cabinet; 4-driving assembly; 41-mounting sleeve; 42-screw; 43-screwing wheel; 44-rectangular tube; 5-locking assembly; 51-sliding sleeve; 52-second roller; 53-locking piece; 531-sliding rod; 532-latch block; 533-connecting rod; 534-first spring; 535-installation inner hole; 54-second liquid crystal elastic strip; 55-L-shaped rod; 56-retaining tube; 6-square tube; 61-long waist hole; 7-first liquid crystal elastic strip; 81-round push rod; 82-square frame; 83-second spring; 84-push piece; 841-oblique retaining rod; 842-torsion spring; 843-extension rod; 844-retaining block. DETAILED DESCRIPTION

[0035] The above and other technical features and advantages of the present invention are described in more detail below in conjunction with the accompanying drawings.

[0036] This embodiment provides a technical solution: a contact propulsion mechanism for a drawer-type switch cabinet, such as Figure 1 and Figure 2 As shown, it includes two mounting seats 11, a pushing component 2, a square tube 6, a driving component 4, a locking component 5, a resetting component and a first liquid crystal elastic strip 7.

[0037] like Figure 1As shown, two mounting seats 11 are slidably mounted on the inner wall of the switch cabinet body 3 through the second slider rail structure 12 to ensure the stability of the vertical movement of the mounting seats 11. Contacts 1 are fixed to the two mounting seats 11. The contact 1 close to the side of the square tube 6 is the control circuit contact, and the other contact 1 is the main circuit contact. The vertical positions of the two mounting seats 11 are staggered, specifically: the height of the main circuit contact is lower than the height of the control circuit contact. When both contacts 1 are connected to the plug of the switch cabinet, the drawer is in the working position; when the control circuit contact is connected to the plug of the switch cabinet, and the main circuit contact is disconnected from the plug of the switch cabinet, the drawer is in the test position; when both contacts 1 are disconnected from the plug of the switch cabinet, the drawer is in the isolation position. In this embodiment, the contact 1 is selected according to the model according to actual needs.

[0038] like Figure 1 As shown, the two mounting seats 11 are both installed on the pushing component 2, and the pushing component 2 includes a pushing block 21. The square tube 6 is fixed to the outer side of the pushing component 2, and the two can be disassembled and connected by a screw member for easy maintenance; the upper side of the pushing block 21 is inclined, and the vertical dimension of the side close to the square tube 6 is larger. A guide groove 22 is provided on the upper side of the pushing block 21, and the guide groove 22 has an inclined portion and a transverse portion connected to the inclined portion. The transverse portion is a side close to the square tube 6, and the inclination of the inclined portion is adapted to the angle of the inclined portion of the upper side of the pushing block 21. Two first rollers 24 are rollingly arranged in the guide groove 22. The diameter of the first roller 24 is adapted to the width of the guide groove 22 to ensure the stability of the cooperation between the guide groove 22 and the first roller 24. The two first rollers 24 are rotatably connected to the two mounting seats 11 respectively, and the pushing block 21 is slidably installed on the inner wall of the switch cabinet 3 through the first slider rail structure 23 to ensure the stability of the pushing block 21 when sliding.

[0039] When the push block 21 moves inward along the slide rail of the first slider rail structure 23 for the first stage, the two contacts 1 will be pushed upward synchronously until the control circuit contact is connected to the plug corresponding to the switch cabinet, and the main circuit contact is disconnected from the plug corresponding to the switch cabinet. At this time, the drawer is in the test position. At the same time, the first roller 24 corresponding to the control circuit contact is located at the top of the inclined portion of the guide groove 22. When the push block 21 moves inward along the slide rail of the first slider rail structure 23 for the second stage, the first roller 24 corresponding to the control circuit contact is located in the guide groove 2 2, so the vertical position of the control circuit contact does not change, and the first roller 24 corresponding to the main circuit contact continues to move in the inclined portion of the guide groove 22, and the main circuit contact continues to be pushed upward, so that the main circuit contact is connected with the plug corresponding to the switch cabinet, and the drawer is in the working position; when the push block 21 moves outward along the slide rail of the first slider rail structure 23, and the push block 21 moves to the original position, the main circuit contact and the control circuit contact are disconnected from the plug corresponding to the switch cabinet, and the drawer is in the isolation position.

[0040] like Figure 2 and Figure 3 As shown, the driving component 4 is installed on the switch cabinet 3, and the inner end of the driving component 4 is slidably connected to the square tube 6. The locking component 5 is used to connect the driving component 4 and the square tube 6, and switch the connection state of the square tube 6 and the driving component 4. The connection state of the square tube 6 and the driving component 4 includes separation and coupling. When the square tube 6 and the driving component 4 are coupled, the driving component 4 can push the pushing component 2 to move horizontally.

[0041] like Figure 2 and Figure 3 As shown, the driving component 4 includes a mounting sleeve 41 fixed to the side wall of the switch cabinet 3, the inner end of the mounting sleeve 41 is slidably inserted in the inner cavity of the square tube 6, the outer contour vertical section of the mounting sleeve 41 is adapted to the inner cavity vertical section of the square tube 6 to ensure the stability of the connection between the two, a rectangular inner hole is opened inside one end of the mounting sleeve 41, a rectangular tube 44 is laterally slidably inserted in the rectangular inner hole, the outer contour vertical section of the rectangular tube 44 is adapted to the vertical section of the rectangular inner hole to ensure the stability of the connection between the two, when the end of the rectangular tube 44 abuts against the inner wall of the rectangular inner hole, the maximum stroke of the pushing component 2 to move outward can be limited; the mounting sleeve 41 is rotatably installed with a screw rod 42, and the inner end of the screw rod 42 is threadedly connected to the rectangular tube 44, and the outer end of the screw rod 42 is fixed with a twisting wheel 43, when the twisting wheel 43 is turned, the screw rod 42 will be driven to rotate, and the relative position of the screw rod 42 and the rectangular tube 44 will change, which can push the pushing block 21 to move laterally.

[0042] like Figure 2 , Figure 3 and Figure 5As shown, the locking assembly 5 includes a sliding sleeve 51 fixed to the inner end of the rectangular tube 44, a locking piece 53 is vertically slidably arranged in the sliding sleeve 51, a long waist hole 61 and a positioning hole are respectively opened on the upper and lower side walls of the square tube 6, and the upper and lower ends of the locking piece 53 are respectively inserted into the long waist hole 61 and the positioning hole, wherein the long waist hole 61 is arranged along the length direction of the square tube 6, and the positioning hole and the locking piece 53 can be gap-connected or disengaged to switch the connection state of the square tube 6 and the rectangular tube 44 to axial fixed or sliding plug-in, an L-shaped rod 55 extending to the upper side of the locking piece 53 is fixed on the upper side wall of the rectangular tube 44, and a second liquid crystal elastic strip 54 is fixed between the L-shaped rod 55 and the locking piece 53; a resisting tube 56 is fixed on the lower side of the L-shaped rod 55, and the resisting tube 56 is hollowed out to ensure that the second liquid crystal elastic strip 54 can absorb heat faster, and the resisting tube 56 corresponds vertically to the locking piece 53, and the resisting tube 56 can limit the maximum stroke of the locking piece 53 moving upward.

[0043] like Figure 1 and Figure 2 As shown, two ends of the first liquid crystal elastic strip 7 are respectively fixed to the square tube 6 and the rectangular tube 44 of the driving assembly 4 . There are multiple first liquid crystal elastic strips 7 , and the multiple first liquid crystal elastic strips 7 are distributed outside the rectangular tube 44 .

[0044] The second liquid crystal elastic strip 54 and the first liquid crystal elastic strip 7 are both made of liquid crystal elastomers. Liquid crystal elastomers (LCEs) are a special polymer material that combines the ordered molecular arrangement characteristics of liquid crystals and the flexibility of elastomers. This material has an ordered structure of liquid crystal phase at the molecular level, and exhibits the reversible deformation ability of elastomers at the macro level. Liquid crystal elastomers exhibit a negative thermal expansion coefficient, that is, as the temperature increases, the volume decreases.

[0045] The first liquid crystal elastic strip 7 and the second liquid crystal elastic strip 54 will shrink as the temperature rises. When a fire occurs in the switch cabinet and the temperature in the switch cabinet rises to a certain height, the second liquid crystal elastic strip 54 will shrink. The tension generated by the shrinkage of the second liquid crystal elastic strip 54 will pull the lock 53 upward, so that the lower end of the lock 53 is separated from the positioning hole and is in a separated state. The square tube 6 and the rectangular tube 44 can slide relative to each other. At the same time, the tension generated by the shrinkage of the first liquid crystal elastic strip 7 will drive the push block 21 of the push assembly 2 to move laterally outward, thereby realizing the separation of the two mounting seats 11.

[0046] On the basis of the above solution, a reset component can be added to insert the lock 53 into the positioning hole so that the square tube 6 and the rectangular tube 44 are switched to a coupled state. Figures 2 to 6As shown, the reset assembly includes a square frame 82, which is jointly arranged in the inner cavity of the square tube 6 and the rectangular tube 44. The inner end of the square frame 82 is connected to the square tube 6, and a circular push rod 81 is fixed to the outer end of the square frame 82. The screw rod 42 is provided with a circular through hole arranged along its axial direction. The outer end of the circular push rod 81 extends into the circular through hole, and the diameter clearance of the circular through hole and the circular push rod 81 is matched.

[0047] When in use, a thin rod can be inserted into the circular through hole and abutted against the circular push rod 81. The thin rod can be continuously pushed into the circular through hole to push the square tube 6 to move inward until the position of the locking element 53 corresponds to the position of the positioning hole. The locking element 53 will enter the positioning hole due to its own gravity, and the connection state between the square tube 6 and the rectangular tube 44 can be switched to coupling, thereby completing the reset.

[0048] On the basis of the above reset assembly solution, in order to facilitate the lock 53 to smoothly enter the positioning hole to complete the coupling of the square tube 6 and the rectangular tube 44, a pusher 84 is further provided and the structure of the lock 53 is improved. Figures 2 to 6 As shown, the lock member 53 includes a sliding rod 531 slidably arranged in the sliding sleeve 51, and the lower end of the sliding rod 531 is slidably connected to the connecting rod 533. Specifically, an installation inner hole 535 is opened in the sliding rod 531, and the upper end of the connecting rod 533 extends into the installation inner hole 535, and the upper end of the connecting rod 533 has a limiting portion, and the transverse cross-section of the limiting portion mounting inner hole 535 is adapted, and the limiting portion can prevent the connecting rod 533 from disengaging from the sliding rod 531. A latch block 532 is fixed to the lower end of the connecting rod 533, and a first spring 534 is arranged between the latch block 532 and the sliding rod 531. The lower end of the sliding rod 531 is processed with an inclined surface, and the inclined surface faces one side of the driving component 4; a pushing piece 84 is arranged on the inner wall of the square frame 82, and the pushing piece 84 is used to push the lock member 53 into the positioning hole, and a second spring 83 is fixed between the inner side of the square frame 82 and the inner side wall of the square tube 6 to play a buffering role.

[0049] like Figures 2 to 6 As shown, the push piece 84 includes an oblique abutment rod 841 rotatably installed on the side wall of the square frame 82 through a rotating shaft, and a torsion spring 842 is arranged between the rotating shaft and the square frame 82. The torsion spring 842 gives the oblique abutment rod 841 a force to flip upward, and an extension rod 843 is fixed to the lower end of the oblique abutment rod 841. The lower side of the extension rod 843 is provided with a stop block 844 fixed to the side wall of the square frame 82, and the stop block 844 can limit the maximum angle of the oblique abutment rod 841 to flip upward. A vertical opening is provided on the side of the sliding sleeve 51 close to the push piece 84, and a second roller 52 extending from the opening is rotatably installed on the side wall of the sliding rod 531. When the second roller 52 contacts the oblique abutment rod 841, the friction force can be reduced, making the movement smoother. When not triggered, the second roller 52 is located on the outer side of the oblique abutment rod 841.

[0050] like Figure 1 and Figure 2 As shown, the vertical cross-section of the stop block 844 is a triangular structure, and the bottom of the stop block 844 is horizontally arranged. This arrangement allows the second roller 52 to translate a certain distance after the second roller 52 is no longer in contact with the oblique stop rod 841 .

[0051] When the temperature in the switch cabinet rises to a certain temperature, the second liquid crystal elastic strip 54 and the first liquid crystal elastic strip 7 will both contract, and the second liquid crystal elastic strip 54 will pull the latch block 532 of the lock 53 out of the positioning hole, and the contraction force of the first liquid crystal elastic strip 7 will pull the square tube 6 and the push block 21 of the push assembly 2 outward, thereby causing both contacts 1 to move downward, so that the drawer is in the isolation position; at the same time, the positions of the second roller 52 and the oblique abutment rod 841 will be relatively displaced, and the oblique abutment rod 841 will flip under the push of the second roller 52, so that the second roller 52 can smoothly move to the inner side of the oblique abutment rod 841, and the oblique abutment rod 841 will be reset due to the torsion spring 842; by pushing the circular push rod 81 to the square tube 6 When resetting with the rectangular tube 44, the second roller 52 will contact the bottom of the oblique abutment rod 841. Since the oblique abutment rod 841 is inclined and blocked by the abutment block 844, the oblique abutment rod 841 will not change its angle, which can make the sliding rod 531 and the latch block 532 squeezed and pushed downward. As the second roller 52 moves, the connecting rod 533 will gradually be inserted into the installation inner hole 535, and the first spring 534 will be squeezed to accumulate force. When the second roller 52 contacts the abutment block 844, the latch block 532 corresponds to the position of the positioning hole. The latch block 532 will be inserted into the positioning hole due to the force of the first spring 534, and continue to push the circular push rod 81, which will compress the second spring 83, so that the position of the second roller 52 and the abutment block 844 is staggered.

[0052] The above are only preferred embodiments of the present invention, which are only illustrative and not restrictive. Those skilled in the art understand that many changes, modifications, and even equivalences may be made to the present invention within the spirit and scope defined by the claims, but all of them will fall within the scope of protection of the present invention.

Claims

1. A contact propulsion mechanism for a drawer-type switch cabinet, characterized in that: include: Two mounting seats (11), the two mounting seats (11) being arranged to slide vertically, the two mounting seats (11) both being fixed with a contact (1), and the vertical positions of the two mounting seats (11) being staggered; A pushing component (2), wherein the two mounting seats (11) are both mounted on the pushing component (2), and when the pushing component (2) moves laterally, the two mounting seats (11) are pushed to move vertically; A square tube (6), wherein the square tube (6) is fixed to one side of the pushing component (2); A driving component (4), the driving component (4) being mounted on the switch cabinet (3), and the inner end of the driving component (4) being slidably connected to the square tube (6), the driving component (4) being used to push the pushing component (2) to move laterally; A locking assembly (5), the locking assembly (5) being used to switch the connection state between the square tube (6) and the driving assembly (4), wherein the connection state between the square tube (6) and the driving assembly (4) includes separation and coupling; a first liquid crystal elastic strip (7), wherein two ends of the first liquid crystal elastic strip (7) are respectively fixed to the square tube (6) and the driving component (4); when the temperature rises to a set temperature, the locking component (5) switches the connection state between the square tube (6) and the driving component (4) to separation, and the first liquid crystal elastic strip (7) contracts to drive the pushing component (2) to move horizontally, thereby realizing the separation of the two mounting seats (11); The drive assembly (4) comprises a mounting sleeve (41) fixed to the side wall of the switch cabinet (3), the inner end of the mounting sleeve (41) is slidably inserted into the inner cavity of the square tube (6), a rectangular inner hole is provided inside one end of the mounting sleeve (41), a rectangular tube (44) is slidably inserted into the rectangular inner hole, a screw rod (42) is rotatably mounted on the mounting sleeve (41), the inner end of the screw rod (42) is threadedly connected to the rectangular tube (44), and a screw wheel (43) is fixed to the outer end of the screw rod (42); The locking assembly (5) comprises a sliding sleeve (51) fixed to the inner end of the rectangular tube (44), a locking piece (53) being vertically slidably arranged in the sliding sleeve (51), the upper and lower side walls of the square tube (6) being respectively provided with a long waist hole (61) and a positioning hole, the upper and lower ends of the locking piece (53) being respectively inserted into the long waist hole (61) and the positioning hole, an L-shaped rod (55) extending to the upper side of the locking piece (53) being fixed to the upper side wall of the rectangular tube (44), and a second liquid crystal elastic strip (54) being fixed between the L-shaped rod (55) and the locking piece (53).

2. The contact propulsion mechanism for a drawer-type switch cabinet according to claim 1, characterized in that: The pushing assembly (2) comprises a pushing block (21), a guide groove (22) being provided on the upper side of the pushing block (21), the guide groove (22) having an inclined portion and a transverse portion connected to the inclined portion, the transverse portion being a side close to the square tube (6), two first rollers (24) being rotatably arranged in the guide groove (22), and the two first rollers (24) being rotatably connected to two mounting seats (11) respectively, and the pushing block (21) being slidably mounted on the inner wall of the switch cabinet (3) via a first slider rail structure (23).

3. The contact propulsion mechanism for a drawer-type switch cabinet according to claim 1, characterized in that: A butt tube (56) is fixed to the lower side of the L-shaped rod (55), and the butt tube (56) corresponds to the locking element (53) in a vertical direction.

4. The contact propulsion mechanism for a drawer-type switch cabinet according to claim 1, characterized in that: The contact propulsion mechanism further comprises a reset assembly, the reset assembly comprising a square frame (82), the square frame (82) being arranged together in the inner cavity of the square tube (6) and the rectangular tube (44), the inner end of the square frame (82) being connected to the square tube (6), a circular push rod (81) being fixed to the outer end of the square frame (82), the screw rod (42) being provided with a circular through hole arranged along its axial direction, and the outer end of the circular push rod (81) extending into the circular through hole.

5. The contact propulsion mechanism for a drawer-type switch cabinet according to claim 4, characterized in that: The locking element (53) comprises a sliding rod (531) slidably arranged in the sliding sleeve (51); the lower end of the sliding rod (531) is slidably connected to a connecting rod (533); a latch block (532) is fixed to the lower end of the connecting rod (533); a first spring (534) sleeved on the connecting rod (533) is arranged between the latch block (532) and the sliding rod (531); and the lower end of the sliding rod (531) is processed with an inclined surface, and the inclined surface faces a side of the driving assembly (4); The inner wall of the square frame (82) is provided with a push piece (84), and the push piece (84) is used to push the locking piece (53) into the positioning hole. A second spring (83) is fixed between the inner side of the square frame (82) and the inner wall of the square tube (6).

6. The contact propulsion mechanism for a drawer-type switch cabinet according to claim 5, characterized in that: The push piece (84) includes an inclined abutment rod (841) rotatably mounted on the side wall of the square frame (82) via a rotating shaft, a torsion spring (842) is arranged between the rotating shaft and the square frame (82), and the torsion spring (842) applies a force to the inclined abutment rod (841) to flip upward, an extension rod (843) is fixed to the lower end of the inclined abutment rod (841), and a stop block (844) fixed to the side wall of the square frame (82) is arranged on the lower side of the extension rod (843), a vertical opening is opened on a side of the sliding sleeve (51) close to the push piece (84), and a second roller (52) extending from the opening is rotatably mounted on the side wall of the sliding rod (531).

7. The contact propulsion mechanism for a drawer-type switch cabinet according to claim 6, characterized in that: The vertical cross-section of the stop block (844) is a triangular structure, and the bottom of the stop block (844) is arranged horizontally.

8. The contact propulsion mechanism for a drawer-type switch cabinet according to claim 1, characterized in that: The mounting seat (11) is slidably mounted on the inner wall of the switch cabinet (3) via a second slider rail structure (12).

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