Universal circuit breaker drawer seat position locking device and its operation method

Abstract

The present invention relates to a locking device, in particular to a universal circuit breaker drawer seat position locking device and its operation method, belonging to the technical field of low-voltage electrical appliance manufacturing. It includes a drawer bottom plate, a screw rod transmission component and a locking and unlocking component. The screw rod transmission component includes a moving drag plate, a positioning rod and a screw rod part. One end of the screw rod part drives the moving drag plate to displace along the drawer bottom plate. The moving drag plate drives the positioning rod to displace. One end of the positioning rod is fixedly connected to the moving drag plate. A universal circuit breaker drawer seat position locking device and its operation method can effectively and accurately lock the circuit breaker body in any of the positions of separation, test and connection, and at the same time can completely lock it with a padlock, having the advantages of compact and reasonable structure, accurate and stable locking, convenient and reliable installation and high safety.

Description

Technical Field

[0001] The present invention relates to a locking device, in particular to a universal circuit breaker drawer seat position locking device and its operation method, belonging to the technical field of low-voltage electrical appliance manufacturing. Background Art

[0002] The universal circuit breaker is an important component in power transmission and distribution equipment. As a main distribution switch, the universal circuit breaker is often installed in a drawer type, that is, it consists of a circuit breaker body and a drawer seat. For a drawer type circuit breaker, it has three position states: separation, test, and connection. In order to accurately position the circuit breaker body in the above three positions to avoid misoperation, it is required that the drawer seat has a position locking device to ensure that the circuit breaker body can be locked in any of the three state positions of separation, test, and connection, and can only be operated after unlocking to move the body to another position. Summary of the Invention

[0003] The present invention mainly solves the deficiencies existing in the prior art, and provides a universal circuit breaker drawer seat position locking device and its operation method with a compact and reasonable structure, accurate and stable locking, convenient and reliable installation, and high safety.

[0004] The above technical problems of the present invention are mainly solved by the following technical solutions:

[0005] A universal circuit breaker drawer seat position locking device includes a drawer bottom plate, a screw drive component, and a locking and unlocking component. The screw drive component includes a moving drag plate, a positioning rod, and a screw member. One end of the screw member drives the moving drag plate to displace along the drawer bottom plate, and the moving drag plate drives the positioning rod to displace. One end of the positioning rod is fixedly connected to the moving drag plate;

[0006] The locking and unlocking component includes a braking interlock rod that makes a small displacement along the drawer bottom plate. The braking interlock rod is provided with a locking component and an unlocking component. The locking component is movably locked with the positioning rod, and the unlocking component is movably unlocked with the positioning rod;

[0007] The other end of the screw member is movably locked with the braking interlock rod.

[0008] Preferably, the locking and unlocking component includes a fixing member, and the fixing member is fixed to the drawer bottom plate;

[0009] The locking component includes a lock catch plate. The upper part of one end of the lock catch plate is provided with a lock hook that is movably locked with the positioning rod. The other end of the lock catch plate is provided with a lock catch plate limiting end that is movably positioned with the positioning rod. The lock catch plate is elastically returned and fixed to the drawer bottom plate;

[0010] The described unlocking component includes a buckle piece. At the bottom of one end of the buckle piece, there is a buckle piece limiting end that is movably unlocked with the positioning rod. The buckle piece is elastically returned and fixed to the drawer bottom plate. The buckle piece is provided with a buckle piece riveting shaft that is movably snapped into the braking interlocking rod.

[0011] The buckle piece and the lock buckle plate are respectively fixed through a positioning shaft and a fixing piece, and the buckle piece and the lock buckle plate rotate along the positioning shaft.

[0012] Preferably, the upper end face of the lock hook is a buckling surface, the side end face of the lock hook is a locking surface, the upper part of the braking interlocking rod is provided with a trapezoidal opening that is movably locked with the lock hook, the buckling surface touches the trapezoidal opening movably along it, and the locking surface is movably locked with the trapezoidal opening.

[0013] The side wall of the braking interlocking rod is provided with a bayonet slot that is movably clamped with the buckle piece riveting shaft. Between the lock buckle plate and the drawer bottom plate, and between the buckle piece and the drawer bottom plate, they are respectively elastically returned and fixed through a tension spring. The tension spring is provided with a fixing pin shaft fixed to the drawer bottom plate.

[0014] A bushing is sleeved in the positioning shaft, and the buckle piece and the lock buckle plate are respectively fixed to the bushing.

[0015] Preferably, the buckling surface is distributed in a downward-sloping manner, the end of the buckling surface is distributed in an arc shape, and the locking surface is distributed in an inward-sloping shape; the limiting end of the lock buckle plate is distributed in an arc shape, and the limiting end of the buckle piece is hook-shaped.

[0016] The entrance of the bayonet slot is an inclined end, the inner end of the bayonet slot is a blocking end, and the buckle piece riveting shaft slides into the blocking end along the inclined end.

[0017] Preferably, the other end of the screw rod member is provided with a positioning piece, the positioning piece is provided with a plurality of limiting notches, and the outer wall of the braking interlocking rod is provided with a braking boss that is movably locked with the limiting notches.

[0018] The upper part of the positioning rod is a surface to be locked. From the inside to the outside at the outer end of the surface to be locked, there are a separation position unlocking notch, a test position unlocking notch, and a connection position unlocking notch in sequence. From the inside to the outside at the inner end of the surface to be locked, there are a separation position locking groove, a test position locking groove, and a connection position locking groove in sequence. The separation position unlocking notch and the separation position locking groove, the test position unlocking notch and the test position locking groove, and the connection position unlocking notch and the connection position locking groove are respectively distributed in a corresponding manner.

[0019] The locking plate limiting end is respectively slidably locked with the separation position locking groove, the test position locking groove and the connection position locking groove, and the buckle piece limiting end is respectively movably unlocked with the separation position unlocking notch, the test position unlocking notch and the connection position unlocking notch.

[0020] Preferably, the number of the limiting notches is 4, and the 4 limiting notches are evenly distributed; the separation position unfastening notch, the test position unfastening notch and the connection position unfastening notch are respectively rectangular notches, and the separation position locking groove, the test position locking groove and the connection position locking groove are respectively semicircular grooves.

[0021] Preferably, a first fixed axis and a second fixed axis are provided on the upper part of the drawer bottom plate, and the first fixed axis and the second fixed axis are distributed in an interval shape. An arc-shaped waist hole is provided in the brake interlocking rod. The upper part of the first fixed axis and the drawer bottom plate, and the upper part of the second fixed axis and the drawer bottom plate are positioned respectively by retaining springs. The brake interlocking rod is slightly displaced along the second fixed axis through the arc-shaped waist hole, and the brake interlocking rod and the drawer bottom plate are elastically connected by a brake spring.

[0022] The brake interlocking rod uses the first fixed axis as a fulcrum and the second fixed axis as a limit axis.

[0023] Preferably, a button for pushing the brake interlock rod is provided at one end of the brake interlock rod, and the outer end of the button is locked with the drawer bottom plate by a padlock, and the padlock extends out of the drawer bottom plate.

[0024] Preferably, the positioning rod and the screw rod member pass through the fixing member respectively, and the positioning rod and the screw rod member are supported by the fixing member.

[0025] An operating method of a universal circuit breaker drawer seat position locking device is performed according to the following steps:

[0026] a. Transmission operation:

[0027] The screw rod rotates to drive the moving carriage and the positioning rod to move forward and backward;

[0028] b. Unbuttoning operation:

[0029] When the unlocking operation is performed with the connection position locked among the separating, testing, and connecting positions of the drawer-type circuit breaker, press the button and move it in the A direction. At this time, the button will drive the brake interlock lever to rotate in the A direction around the positioning shaft, and the brake boss on the brake interlock lever will separate from the limit notch on the lead screw part; when the brake interlock lever 2 moves a certain distance in the A direction, the buckle groove on the brake interlock lever contacts the buckle rivet shaft on the buckle piece. As the brake interlock lever continues to move in the A direction, the buckle groove on the brake interlock lever will drive the buckle rivet shaft and the buckle piece to rotate together around the bushing in the B direction. At this time, the buckle limit end on the buckle piece separates from the unlocking notch at the connection position on the positioning part; at the same time, when the brake interlock lever moves in the A direction, it contacts the lock buckle plate, and the lock buckle plate is pressed and slides under the brake interlock lever. As the brake interlock lever continues to move in the A direction, when the buckling surface of the lock buckle plate slides into the trapezoidal opening of the brake interlock lever, due to the restoring force of the tension spring on the lock buckle plate, the lock buckle plate will rotate around the positioning shaft in the C direction;

[0030] Since the circuit breaker is currently in the connected position and the limit end of the lock buckle plate is above the locking groove at the connection position of the positioning rod, when the lock buckle plate rotates around the positioning shaft in the C direction, the buckling surface of the lock buckle plate buckles the to-be-locked surface on the trapezoidal opening of the brake interlock lever, jamming the brake interlock lever and preventing it from returning in the reverse A direction due to the restoring force of the brake spring. This process is unlocking;

[0031] c. To-be-locked operation:

[0032] At the unlocking state in step (b), when the lead screw part rotates in the D direction, the positioning rod will move in the E direction. At this time, the buckle limit end on the buckle piece acts on the to-be-locked surface of the positioning rod, fixing the locking component in place, and the buckle rivet shaft is located at the upper end of the buckle groove in the brake interlock lever; when the lock limit end on the lock buckle plate moves from the locking groove at the connection position to the to-be-locked surface of the positioning rod as the positioning rod moves, the lock buckle plate will also rotate around the positioning shaft in the F direction. When the buckling surface on the lock buckle plate slides past the to-be-locked surface on the trapezoidal opening of the brake interlock lever, the brake interlock lever will return in the E direction under the restoring force of the brake spring. However, since the buckle rivet shaft is located at the upper end of the buckle groove in the brake interlock lever, its hook-shaped structure blocks the brake interlock lever, preventing the brake interlock lever from returning in the E direction. At this time, the brake interlock lever is only limited by the buckle rivet shaft. This process is to-be-locked;

[0033] d. Locking operation:

[0034] When in the waiting-to-be-locked state following step (c), rotate the lead screw member in the D direction. The positioning rod will move in the E direction. When the unlocking notch at the test position on the positioning rod exactly moves below the retaining end of the retaining piece, due to the restoring force of the tension spring, the retaining piece and the retaining piece rivet shaft riveted thereon will rotate together around the positioning shaft in the G direction. The retaining end of the retaining piece will fall into the unlocking notch at the test position on the positioning rod. At this time, the retaining piece rivet shaft will get rid of the limitation of the hooked structure in the clamping groove of the braking interlocking rod, and the braking interlocking rod will return in the E direction under the restoring force of the braking spring. The braking boss on the braking interlocking rod will be stuck into the limiting notch on the lead screw member. At this time, the lead screw member is stuck by the braking interlocking rod, and this process is locking;

[0035] In the locked state at the test position, continue to operate successively according to the above steps of unlocking, waiting-to-be-locked, and locking, and the circuit breaker drawer base can be locked in the separated position;

[0036] When operating in reverse, the drawer base can also be locked successively at the separated, test, and connected positions.

[0037] The button passes through the limit of the drawer base bottom plate to ensure its front-back movement in a fixed direction, and the padlock locks the braking interlocking rod completely in a specific position;

[0038] The present invention provides a universal circuit breaker drawer base position locking device and its operation method, which can effectively and accurately lock the circuit breaker body at any one of the separated, test, and connected positions, and at the same time can lock it completely through a padlock, having the advantages of compact and reasonable structure, accurate and stable locking, convenient and reliable installation, and high safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 is the three-dimensional structure schematic diagram of the present invention;

[0040] Figure 2 is the structure schematic diagram of the lead screw transmission component in the present invention;

[0041] Figure 3 is the three-dimensional structure schematic diagram of the locking and unlocking component in the present invention;

[0042] Figure 4 is Figure 3 the partial exploded view of

[0043] Figure 5 is the three-dimensional structure schematic diagram of the lead screw member in the present invention;

[0044] Figure 6 is the three-dimensional structure schematic diagram of the positioning rod in the present invention;

[0045] Figure 7 is the three-dimensional structure schematic diagram of the locking component in the present invention;

[0046] Figure 8 is a schematic three-dimensional structure diagram of the unlocking component in the present invention;

[0047] Figure 9 is a schematic three-dimensional structure diagram of the present invention in the unlocked state;

[0048] Figure 10 is a schematic three-dimensional structure diagram of the unlocking component in the unlocked state of the present invention;

[0049] Figure 11 is a schematic three-dimensional structure diagram of the locking component in the unlocked state of the present invention;

[0050] Figure 12 is a schematic three-dimensional structure diagram of the present invention in the state to be locked;

[0051] Figure 13 is a schematic three-dimensional structure diagram of the unlocking component in the state to be locked of the present invention;

[0052] Figure 14 is a schematic three-dimensional structure diagram of the locking component in the state to be locked of the present invention;

[0053] Figure 15 is a schematic three-dimensional structure diagram of the present invention in the locked state;

[0054] Figure 16 is a schematic three-dimensional structure diagram of the unlocking component in the locked state of the present invention. Detailed Embodiment

[0055] The technical solution of the present invention will be further specifically described below through embodiments in conjunction with the drawings.

[0056] Embodiment 1: As shown in the figure, a universal circuit breaker drawer seat position locking device includes a drawer bottom plate 1, a screw drive component, and a locking and unlocking component. The screw drive component includes a moving drag plate 2, a positioning rod 3, and a screw member 4. One end of the screw member 4 drives the moving drag plate 2 to displace along the drawer bottom plate 1, and the moving drag plate 2 drives the positioning rod 3 to displace. One end of the positioning rod 3 is fixedly connected to the moving drag plate 2;

[0057] The locking and unlocking component includes a braking interlocking rod 5 that undergoes a small displacement along the drawer bottom plate 1. The braking interlocking rod 5 is provided with a locking component and an unlocking component. The locking component is in an active locking state with the positioning rod 3, and the unlocking component is in an active unlocking state with the positioning rod 3;

[0058] The other end of the screw member 4 is in an active locking state with the braking interlocking rod 5.

[0059] The locking and unlocking component includes a fixing member 6, and the fixing member 6 is fixed to the drawer bottom plate 1;

[0060] The described locking assembly includes a lock catch plate 8. At the upper part of one end of the lock catch plate 8, there is a lock hook 9 that is movably locked with the positioning rod 3. At the other end of the lock catch plate 8, there is a lock catch plate limiting end 10 that is movably positioned with the positioning rod 3. The lock catch plate 8 is elastically returned and fixed to the drawer bottom plate 1;

[0061] The described unlocking assembly includes a buckle piece 11. At the bottom of one end of the buckle piece 11, there is a buckle piece limiting end 12 that is movably unlocked with the positioning rod 3. The buckle piece 11 is elastically returned and fixed to the drawer bottom plate 1. In the buckle piece 11, there is a buckle piece rivet shaft 13 that is movably inserted into the braking interlocking rod 5;

[0062] The buckle piece 11 and the lock catch plate 8 are respectively fixed to the fixing member 6 through a positioning shaft 14, and the buckle piece 11 and the lock catch plate 8 rotate along the positioning shaft 14.

[0063] The upper end surface of the lock hook 9 is a buckling surface 15, and the side end surface of the lock hook 9 is a locking surface 16. At the upper part of the braking interlocking rod 5, there is a trapezoidal opening 17 that is movably locked with the lock hook 9. The buckling surface 15 makes a movable contact along the trapezoidal opening 17, and the locking surface 16 is movably locked with the trapezoidal opening 17;

[0064] On the side wall of the braking interlocking rod 5, there is a bayonet slot 18 that is movably clamped with the buckle piece rivet shaft 13. Between the lock catch plate 8 and the drawer bottom plate 1, and between the buckle piece 11 and the drawer bottom plate 1, they are respectively elastically returned and fixed through a tension spring 19. In the tension spring 19, there is a fixed pin shaft 20 fixed to the drawer bottom plate 1;

[0065] A bushing 21 is sleeved in the positioning shaft 14, and the buckle piece 11 and the lock catch plate 8 are respectively fixed to the bushing 21.

[0066] The buckling surface 15 is distributed in a downward inclined manner, and the end of the buckling surface 15 is distributed in an arc shape. The locking surface 16 is distributed in an inward inclined manner; the lock catch plate limiting end 10 is distributed in an arc shape, and the buckle piece limiting end 12 is in a hook shape;

[0067] The entrance of the bayonet slot 18 is an inclined end 22, and the inner end of the bayonet slot 18 is a blocking end 23. The buckle piece rivet shaft 13 slides into the blocking end 23 along the inclined end 22.

[0068] At the other end of the lead screw member 4, there is a positioning piece 24. On the positioning piece 24, there are several limiting notches 25. On the outer wall of the braking interlocking rod 5, there is a braking boss 26 that is movably locked with the limiting notches 25;

[0069] The upper part of the positioning rod 3 is a waiting-for-locking surface 27, and the outer end of the waiting-for-locking surface 27 is provided with a separation position unfastening notch 28, a test position unfastening notch 29 and a connection position unfastening notch 30 in sequence from the inside to the outside, and the inner end of the waiting-for-locking surface 27 is provided with a separation position locking groove 31, a test position locking groove 32 and a connection position locking groove 33 in sequence from the inside to the outside, and the separation position unfastening notch 28 and the separation position locking groove 31, the test position unfastening notch 29 and the test position locking groove 32, and the connection position unfastening notch 30 and the connection position locking groove 33 are respectively distributed in a corresponding manner;

[0070] The locking plate limiting end 10 is slidingly locked with the separation position locking groove 31, the test position locking groove 32 and the connection position locking groove 33 respectively, and the locking piece limiting end 12 is movably unlocked with the separation position unlocking notch 28, the test position unlocking notch 29 and the connection position unlocking notch 30 respectively.

[0071] The number of the limiting notches 25 is 4, and the 4 limiting notches 25 are evenly distributed; the separation position unfastening notch 28, the test position unfastening notch 29 and the connection position unfastening notch 30, the separation position locking groove 31, the test position locking groove 32 and the connection position locking groove 33 are semicircular grooves respectively.

[0072] A first fixed axis 34 and a second fixed axis 35 are provided on the upper part of the drawer bottom plate 1, and the first fixed axis 34 and the second fixed axis 35 are distributed in an interval shape. An arc-shaped waist hole 36 is provided in the brake interlocking rod 5. The upper part of the first fixed axis 34 and the drawer bottom plate 1, and the upper part of the second fixed axis 35 and the drawer bottom plate 1 are positioned by retaining springs respectively. The brake interlocking rod 5 is slightly displaced along the second fixed axis 35 through the arc-shaped waist hole 36, and the brake interlocking rod 5 and the drawer bottom plate 1 are elastically connected by a brake spring 37.

[0073] One end of the brake interlock rod 5 is provided with a button 38 for pushing the brake interlock rod 5 , and the outer end of the button 38 is locked with the drawer bottom plate 1 through a padlock 39 , and the padlock 39 extends out of the drawer bottom plate 1 .

[0074] The positioning rod 3 and the screw rod 4 pass through the fixing member 6 respectively, and the positioning rod 3 and the screw rod 4 are supported by the fixing member 6 .

[0075] An operating method of a universal circuit breaker drawer seat position locking device is performed according to the following steps:

[0076] a. Transmission operation:

[0077] The screw rod rotates to drive the moving carriage and the positioning rod to move forward and backward;

[0078] b. Unlatching operation:

[0079] When the connection position among the three positions of separation, test, and connection of the draw-out circuit breaker is locked, perform the unlatching operation. Press the button and move it in the A direction. At this time, the button will drive the brake interlock rod to rotate in the A direction around the positioning shaft, and the brake boss on the brake interlock rod will separate from the limit notch on the lead screw part; when the brake interlock rod 2 moves a certain distance in the A direction, the snap groove on the brake interlock rod contacts the rivet shaft of the buckle on the buckle piece. As the brake interlock rod continues to move in the A direction, the snap groove on the brake interlock rod will drive the rivet shaft of the buckle piece and the buckle piece to rotate in the B direction around the bushing together. At this time, the limit end of the buckle piece on the buckle piece separates from the unlocking notch at the connection position on the positioning part; at the same time, when the brake interlock rod moves in the A direction, it contacts the lock catch plate, and the lock catch plate is pressed and slides under the brake interlock rod. As the brake interlock rod continues to move in the A direction, when the latching surface of the lock catch plate slides into the trapezoidal opening of the brake interlock rod, due to the restoring force of the tension spring on the lock catch plate, the lock catch plate will rotate in the C direction around the positioning shaft;

[0080] Since the circuit breaker is currently in the connection position and the limit end of the lock catch plate is above the locking groove at the connection position of the positioning rod, when the lock catch plate rotates in the C direction around the positioning shaft, the latching surface of the lock catch plate latches the surface to be locked on the trapezoidal opening of the brake interlock rod, jamming the brake interlock rod and preventing it from returning in the reverse A direction due to the restoring force of the brake spring. This process is the unlatching;

[0081] c. To-be-locked operation:

[0082] In the unlatching state in step (b), when the lead screw part rotates in the D direction, the positioning rod will move in the E direction. At this time, the limit end of the buckle piece on the buckle piece acts on the to-be-locked surface of the positioning rod, keeping the locking component in a fixed position, and the rivet shaft of the buckle piece is located at the upper end of the snap groove in the brake interlock rod; when the limit end of the lock catch plate on the lock catch plate moves from the locking groove at the connection position to the to-be-locked surface of the positioning rod as the positioning rod moves, the lock catch plate will also rotate in the F direction around the positioning shaft. When the latching surface of the lock catch plate slides past the surface to be locked on the trapezoidal opening of the brake interlock rod, the brake interlock rod will return in the E direction under the restoring force of the brake spring. However, since the rivet shaft of the buckle piece is located at the upper end of the snap groove in the brake interlock rod, its hook-shaped structure blocks the brake interlock rod, preventing the brake interlock rod from returning in the E direction. At this time, the brake interlock rod is only limited by the rivet shaft of the buckle piece. This process is the to-be-locked;

[0083] d. Locking operation:

[0084] When in the waiting-to-be-locked state following step (c), rotate the lead screw member in the D direction. The positioning rod will move in the E direction. When the test position unlocking notch on the positioning rod just moves below the latch limit end on the latch, due to the restoring force of the tension spring, the latch and the latch rivet shaft riveted thereon will rotate together around the positioning shaft in the G direction. The latch limit end on the latch will fall into the test position unlocking notch on the positioning rod. At this time, the latch rivet shaft will get out of the limit of the hook-shaped structure in the buckle groove of the braking interlock lever. The braking interlock lever will return in the E direction under the restoring force of the braking spring. The braking boss on the braking interlock lever will snap into the limit notch on the lead screw member. At this time, the lead screw member is locked by the braking interlock lever. This process is locking;

[0085] In the locked state at the test position, continue to operate successively according to the above steps of unlocking, waiting-to-be-locked, and locking, and the circuit breaker drawer base can be locked in the separated position;

[0086] When operating in reverse, the drawer base can also be locked at the separated, test, and connected positions successively.

Claims

1. A universal circuit breaker drawer seat position locking device, characterized in that: It includes a drawer bottom plate (1), a screw drive component, and a locking and unlocking component. The screw drive component includes a moving carriage (2), a positioning rod (3), and a screw member (4). One end of the screw member (4) drives the moving carriage (2) to displace along the drawer bottom plate (1). The moving carriage (2) drives the positioning rod (3) to displace. One end of the positioning rod (3) is fixedly connected to the moving carriage (2). The locking and unlocking component includes a braking interlock rod (5) that makes a small displacement along the drawer bottom plate (1). The braking interlock rod (5) is provided with a locking component and an unlocking component. The locking component is in a movable locking state with the positioning rod (3), and the unlocking component is in a movable unlocking state with the positioning rod (3). The other end of the screw member (4) is in a movable locking state with the braking interlock rod (5). The locking and unlocking component includes a fixing member (6), and the fixing member (6) is fixed to the drawer bottom plate (1). The locking component includes a lock catch plate (8). At the upper part of one end of the lock catch plate (8), there is a lock hook (9) that is in a movable locking state with the positioning rod (3). At the other end of the lock catch plate (8), there is a lock catch plate limiting end (10) that is in a movable positioning state with the positioning rod (3). The lock catch plate (8) is elastically returned and fixed to the drawer bottom plate (1). The unlocking component includes a buckle piece (11). At the bottom of one end of the buckle piece (11), there is a buckle piece limiting end (12) that is in a movable unlocking state with the positioning rod (3). The buckle piece (11) is elastically returned and fixed to the drawer bottom plate (1). The buckle piece (11) is provided with a buckle piece rivet shaft (13) that is in a movable clamping state with the braking interlock rod (5). The buckle piece (11) and the lock catch plate (8) are respectively fixed to the fixing member (6) through a positioning shaft (14), and the buckle piece (11) and the lock catch plate (8) rotate along the positioning shaft (14). The upper end face of the lock hook (9) is a buckling face (15), and the side end face of the lock hook (9) is a locking face (16). The upper part of the braking interlock rod (5) is provided with a trapezoidal opening (17) that is in a movable locking state with the lock hook (9). The buckling face (15) makes a movable contact along the trapezoidal opening (17), and the locking face (16) is in a movable locking state with the trapezoidal opening (17). The side wall of the braking interlock rod (5) is provided with a bayonet slot (18) that is in a movable clamping state with the buckle piece rivet shaft (13). Between the lock catch plate (8) and the drawer bottom plate (1), and between the buckle piece (11) and the drawer bottom plate (1), they are respectively elastically returned and fixed through a tension spring (19). The tension spring (19) is provided with a fixing pin shaft (20) fixed to the drawer bottom plate (1). A bushing (21) is sleeved in the positioning shaft (14), and the buckle piece (11) and the lock catch plate (8) are respectively fixed to the bushing (21). The other end of the lead screw member (4) is provided with a positioning piece (24), and a plurality of limiting notches (25) are provided on the positioning piece (24). A braking boss (26) which is in movable locking with the limiting notches (25) is provided on the outer wall of the braking interlocking rod (5). The upper part of the positioning rod (3) is a surface to be locked (27). From the inside to the outside, a separation position unlocking notch (28), a test position unlocking notch (29), and a connection position unlocking notch (30) are sequentially provided at the outer end of the surface to be locked (27). From the inside to the outside, a separation position locking groove (31), a test position locking groove (32), and a connection position locking groove (33) are sequentially provided at the inner end of the surface to be locked (27). The separation position unlocking notch (28) and the separation position locking groove (31), the test position unlocking notch (29) and the test position locking groove (32), and the connection position unlocking notch (30) and the connection position locking groove (33) are respectively distributed in a corresponding manner. The limiting ends of the lock catch plate (10) are respectively in sliding locking with the separation position locking groove (31), the test position locking groove (32), and the connection position locking groove (33). The limiting ends of the buckle piece (12) are respectively in movable unlocking with the separation position unlocking notch (28), the test position unlocking notch (29), and the connection position unlocking notch (30).

2. The position locking device for the universal circuit breaker drawer base according to claim 1, characterized in that: The buckling surface (15) is distributed in a downward inclination, and the end of the buckling surface (15) is distributed in an arc shape. The locking surface (16) is distributed in an inner inclination. The limiting end of the lock catch plate (10) is distributed in an arc shape, and the limiting end of the buckle piece (12) is in a hook shape. The entrance of the bayonet slot (18) is an inclined end (22), and the inner end of the bayonet slot (18) is a blocking end (23). The buckle rivet shaft (13) slides into the blocking end (23) along the inclined end (22).

3. The position locking device for the universal circuit breaker drawer seat according to claim 1, characterized in that: The number of the limiting notches (25) is 4, and the 4 limiting notches (25) are evenly distributed. The separation position unlocking notch (28), the test position unlocking notch (29), and the connection position unlocking notch (30), and the separation position locking groove (31), the test position locking groove (32), and the connection position locking groove (33) are respectively semi-circular grooves.

4. A universal circuit breaker drawer seat position locking device according to claim 1, characterized in that: The upper part of the drawer bottom plate (1) is provided with a first fixed shaft (34) and a second fixed shaft (35). The first fixed shaft (34) and the second fixed shaft (35) are distributed at intervals. An arc-shaped waist hole (36) is provided in the braking interlocking rod (5). The upper part between the first fixed shaft (34) and the drawer bottom plate (1) and the upper part between the second fixed shaft (35) and the drawer bottom plate (1) are respectively positioned by a circlip. The braking interlocking rod (5) performs a small displacement along the second fixed shaft (35) through the arc-shaped waist hole (36). The braking interlocking rod (5) is elastically connected to the drawer bottom plate (1) through a braking spring (37).

5. The position locking device for the universal circuit breaker drawer seat according to claim 1, wherein: One end of the described braking interlock lever (5) is provided with a button (38) for pushing the braking interlock lever (5). The outer end of the button (38) is locked with the drawer bottom plate (1) through a padlock (39), and the padlock (39) extends out of the drawer bottom plate (1).

6. The position locking device for the universal circuit breaker drawer seat according to claim 1, wherein: The described positioning rod (3) and the lead screw member (4) respectively pass through the fixing member (6), and the positioning rod (3) and the lead screw member (4) are supported by the fixing member (6).

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