CN216530190U - Prevention type handcart ground knife interlocking device - Google Patents

Abstract

The utility model relates to a preventive handcart and ground cutter interlocking device. The interlocking device comprises a shell, a grounding operation shaft and a grounding operation hole, wherein a partition plate is fixedly arranged in the shell, an upper guide rail is fixedly arranged above the partition plate, an opening is formed in the upper guide rail, an interlocking plate is arranged on the partition plate, the interlocking plate is rotatably connected to the partition plate through a rotating shaft extending along the front-back direction, and an idle pushing convex part capable of extending into the opening or exiting out of the opening in the rotating process of the interlocking plate around the rotating shaft is arranged at the upper end part of the interlocking plate; the automatic unlocking device further comprises an opening and closing assembly, a synchronizing component, a locking assembly, an unlocking assembly, a retaining assembly and a connecting and interlocking reset component. According to the circuit breaker, after each grounding switch operation, the grounding operation hole can be automatically closed, so that the occurrence of misoperation can be prevented, and when the grounding switch is at the switching-on position, the circuit breaker cannot enter the working position from the test position, so that the function of the circuit breaker for preventing false switching in five-prevention is realized, the mechanical transmission reliability is high, and the deformation of parts is not easy to occur.

Description

Prevention type handcart ground knife interlocking device

Technical Field

The utility model relates to the technical field of switch cabinets, in particular to a preventive handcart and ground knife interlocking device.

Background

The switch cabinet grounding chamber mainly comprises a cabinet body, a grounding knife (namely a grounding switch) arranged in the cabinet body and a grounding operation shaft used for controlling the grounding switch to close and open. In order to ensure safety, the switch cabinet is required to have a reliable function of a circuit breaker capable of preventing false switching, namely, when the grounding switch is in a switching-on state, the circuit breaker handcart at the test position cannot be operated to move to the working position, and only when the grounding switch is in switching-off state, the circuit breaker handcart can be controlled to move to the working area.

The following scheme is mainly adopted for solving the problems of false switching and disconnection at present:

1. the danger degree is high and the reliability is poor due to manual control;

2. adopt passive form to prevent maloperation, force spacing prevention operation in the midway of maloperation promptly, it is very big to force the harm of spacing interlocking to the locating part passively, easily causes the deformation of ground connection action bars.

SUMMERY OF THE UTILITY MODEL

The utility model aims to: the device is after earthing switch operation at every turn, and the ground connection handle hole can self-closing, can prevent the emergence of maloperation to when earthing switch in the combined floodgate position, the unable operating position that gets into from experimental position of circuit breaker, realize the circuit breaker function of preventing closing by mistake in the five preventions, and mechanical transmission strong reliability just is difficult for taking place spare part and warp.

The utility model is realized by the following technical scheme: a preventive handcart earthing switch interlocking device comprises a shell, wherein an earthing operation shaft which extends along the front-back direction of the shell and is used for controlling an earthing switch to be switched off or switched on in the rotating process is rotatably connected in the shell, and an earthing operation hole used for conveniently connecting and controlling the earthing operation shaft to rotate is formed in the front side wall of the shell;

the method is characterized in that: a partition plate which is vertical to a grounding operation shaft and extends along the vertical direction is fixedly arranged in a shell, an upper guide rail which extends along the front-back direction is fixedly arranged above the partition plate, an opening which is communicated with the left side wall and the right side wall of the upper guide rail is arranged on the upper guide rail, an interlocking plate is arranged on the partition plate, the interlocking plate is rotatably connected to the partition plate through a rotating shaft which extends along the front-back direction, and a pushing convex part which can extend into the opening in the rotating process of the rotating shaft or withdraw from the idle state outside the opening is arranged at the upper end part of the interlocking plate;

the interlocking device for the handcart and the earthing knife further comprises an opening and closing assembly, a synchronizing component, a locking assembly, an unlocking assembly and a maintaining assembly, wherein the opening and closing assembly is arranged on the shell and used for controlling the earthing operation hole to be switched between an opening state and a closing state, the synchronizing component is arranged between the opening and closing assembly and the interlocking plate and used for pushing the interlocking plate to enter a working state from an idle state along with the movement of the opening and closing assembly when the opening and closing assembly enters the opening state from the state of closing the earthing operation hole, the locking assembly is connected between the opening and closing assembly and the shell and used for locking the opening and closing assembly, the unlocking assembly is connected between the locking assembly and the earthing operation shaft and used for unlocking the locking assembly by the locking assembly in the rotating process of the earthing operation shaft, the maintaining assembly is connected between the earthing operation shaft and the interlocking plate and used for maintaining the interlocking plate in the working state or relieving the maintaining effect on the working state of the interlocking plate when the locking assembly is unlocked by the locking assembly, And an interlocking reset part connected between the shell and the interlocking plate and used for driving the interlocking plate to reset from a working state to an idle state.

For better implementation of the scheme, the following optimization scheme is also provided:

in order to facilitate the control of the opening and closing of the grounding operation hole, the opening and closing assembly comprises an operation rotating shaft and a cover plate, the operation rotating shaft is parallel to the grounding operation shaft and is rotatably connected in the shell, one axial end of the operation rotating shaft extends out of the front side wall of the shell and is located on the side of the grounding operation hole, and the cover plate is eccentrically and fixedly arranged on the operation rotating shaft and can be switched between two states of opening and closing the grounding operation hole in the rotating process along with the operation rotating shaft.

In order to facilitate the resetting of the operation rotating shaft, the opening and closing assembly further comprises an operation torsion spring which is sleeved on the periphery of the operation rotating shaft, and two ends of the operation torsion spring act between the shell and the operation rotating shaft and are used for providing reverse acting force for resetting the operation rotating shaft from the opening state to the closing state.

In order to facilitate pushing the interlocking plate to work, the synchronous component is an operation frame which is eccentrically arranged on the operation rotating shaft and is positioned below the interlocking plate, a pushing component which is pressed against the lower side of the interlocking plate is fixedly arranged on the operation frame, and the pushing component can push the interlocking plate to rotate around the rotating shaft of the interlocking plate in the process of rotating along with the operation rotating shaft until the pushing convex part enters the working state of the opening.

For the convenience of locking the open mode, be equipped with the straight line guide slot of vertical extension and link up its front and back lateral wall on the baffle, the locking subassembly includes along the fore-and-aft direction extend and the activity wear to establish the straight line guide slot can relative straight line guide slot reciprocate first body of rod, with the perpendicular fixed connection of first body of rod one end and with the baffle about swing joint the second body of rod, connect between baffle and the second body of rod be used for providing the reset spring of the downward effort of the second body of rod and fixed mounting pivot the rotor in the operation, its bottom of first body of rod contacts with the periphery wall of rotor under reset spring's effect to the periphery wall of rotor is equipped with a recess, when opening and close being in the open mode of subassembly, the first body of rod is gone into in the recess and is rotated with restriction operation pivot under reset spring's effect.

In order to facilitate the release of the opening state, the unlocking assembly comprises a third rod body fixedly arranged at the lower end of the second rod body and extending along the left-right direction, and a reset cam fixedly arranged on the grounding operation shaft and positioned below the third rod body, wherein when the reset cam rotates to the position of the maximum ascending stroke of the third rod body, the convex part of the reset cam upwards jacks the third rod body, and the first rod body can be pushed to upwards separate from the limit of the groove.

In order to maintain the working state of the interlocking plate, an interlocking pin extending along the front-back direction is fixedly arranged on the interlocking plate, the maintaining assembly comprises an L-shaped transmission block connected with the partition plate in a vertical sliding mode, a pressure spring connected between the L-shaped transmission block and the partition plate and used for providing acting force for enabling the L-shaped transmission block to move downwards, and a locking cam fixedly installed on the operating shaft and located below the L-shaped transmission block, a cross rod portion of the L-shaped transmission block extends along the left-right direction and is hooked below the interlocking pin, and when a convex portion of the locking cam pushes the L-shaped transmission block to rise to the maximum stroke position, the interlocking plate maintains the working state, wherein a connecting line of a convex portion vertex of the locking cam and the center of the operating shaft and a connecting line of a convex portion vertex of the reset cam and the center of the operating shaft are arranged at an included angle of 90 degrees, so that the two cams can act in a staggered mode.

In order to facilitate the control of the rotation of the operation rotating shaft, an operation handle is further arranged at the tail end of the operation rotating shaft, which extends out of the shell.

In order to prevent the charged switch-on grounding switch, an electromagnetic lock used for locking and controlling the cover plate to prevent the cover plate from rotating is further arranged in the shell, and the electromagnetic lock comprises a body fixedly installed in the shell, an iron core arranged in the body and capable of stretching and moving back and forth relative to the body, a circular baffle fixedly arranged at the front end part of the iron core and positioned above the cover plate, and an electromagnet used for controlling the iron core to stretch and retract according to the charged condition.

Preferably, the interlocking reset component is an interlocking reset torsion spring which is sleeved on the periphery of the rotating shaft, and two ends of the interlocking reset torsion spring respectively act on the shell and the interlocking plate.

Compared with the prior art, the utility model has the beneficial effects that:

1. according to the utility model, after each grounding switch operation, the grounding operation hole can be automatically closed, so that the occurrence of misoperation can be prevented, and when the grounding switch is in a switching-on position, the breaker cannot enter a working position from a test position, so that the function of the five-prevention false switching-on breaker is realized, and the mechanical transmission reliability is strong, and the deformation of parts is not easy to occur.

2. When the circuit breaker handcart is in a working state position, the grounding operation hole can not be opened all the time, and misoperation can be prevented.

3. The electromagnetic lock is further arranged, when the cable end is electrified, the cover plate can be locked, the grounding operation hole is also in a closed state, and the electrified grounding knife can be effectively prevented from being switched on.

Drawings

FIG. 1 is a schematic structural diagram of an embodiment of the present invention;

FIG. 2 is a side view of an embodiment of the present invention;

FIG. 3 is a schematic view of a partial structure of an opening and closing assembly according to an embodiment of the present invention;

FIG. 4 is a front view of the handle beginning to rotate in accordance with an embodiment of the present invention;

FIG. 5 is a cross-sectional view A-A of FIG. 4;

FIG. 6 is a cross-sectional view taken along line B-B of FIG. 4;

FIG. 7 is a side view of the handle beginning to rotate in an embodiment of the present invention;

FIG. 8 is a schematic diagram of an open state of the grounding hole in the embodiment of the present invention;

FIG. 9 is a schematic view of an example of an operating state in which the locking state of the rotating shaft is released;

FIG. 10 is a schematic view of the ground knife closing and the operating handle returning in the embodiment of the present invention;

FIG. 11 is a schematic structural view of each rod body according to an embodiment of the present invention;

FIG. 12 is a schematic view of an embodiment of the present invention;

FIG. 13 is a first schematic interlocking diagram of a cable end with power according to an embodiment of the present invention;

FIG. 14 is a second schematic interlocking diagram of a cable end with power according to an embodiment of the present invention;

FIG. 15 is a schematic view of a usage state of the embodiment of the present invention;

fig. 16 is a schematic diagram of an interlock between the embodiment of the utility model and a circuit breaker trolley.

Description of the reference symbols: 1-shell, 11-partition plate, 12-upper guide rail, 13-open hole, 14-linear guide groove, 2-grounding operation shaft, 21-grounding operation hole, 3-interlocking plate, 31-rotating shaft, 32-interlocking pin, 4-opening and closing component, 41-operation rotating shaft, 42-cover plate, 43-operation torsion spring, 44-operation handle, 5-synchronous component, 51-pushing component, 6-locking component, 61-first rod body, 62-second rod body, 63-return spring, 64-rotating body, 641-groove, 7-unlocking component, 71-third rod body, 72-return cam, 8-retaining component, 81-L-shaped transmission block, 811-transverse rod part, 82-pressure spring, 83-locking cam, locking cam, 9-interlocking reset part, a-electromagnetic lock, a 1-body, a 2-iron core, a 3-circular catch, b 1-chassis lock plate, b 2-operation hole lock plate.

Detailed Description

The utility model is described in detail below with reference to the following description of the drawings:

as shown in fig. 1-16, a preventive handcart earthing switch interlocking device comprises a housing 1, an earthing operation shaft 2 which extends along the front and back direction of the housing 1 and is used for controlling the opening or closing of an earthing switch in the rotating process is rotatably connected in the housing 1, and an earthing operation hole 21 which is used for conveniently connecting and controlling the rotation of the earthing operation shaft 2 is arranged on the front side wall of the housing 1;

a partition plate 11 extending vertically along the vertical direction is fixedly arranged in a shell 1, a vertical grounding operation shaft 2 is fixedly arranged above the partition plate 11, an upper guide rail 12 extending along the front-back direction is fixedly arranged above the partition plate 11, an opening 13 communicated with the left side wall and the right side wall of the upper guide rail 12 is arranged on the upper guide rail 12, an interlocking plate 3 is arranged on the partition plate 11, the interlocking plate 3 is rotatably connected to the partition plate 11 through a rotating shaft 31 extending along the front-back direction, and a pushing convex part which can extend into the opening 13 in the rotating process around the rotating shaft 31 or exit from the idle state outside the opening 13 is arranged at the upper end part of the interlocking plate 3;

the preventive handcart and ground knife interlocking device further comprises an opening and closing assembly 4 arranged on the shell 1 and used for controlling the ground operation hole 21 to be switched between an opening state and a closing state, a synchronizing component 5 arranged between the opening and closing assembly 4 and the interlocking plate 3 and used for pushing the interlocking plate 3 to enter a working state from an idle state along with the movement of the opening and closing assembly 4 when the opening and closing assembly 4 enters the opening state from the state of closing the ground operation hole 21, a locking assembly 6 connected between the opening and closing assembly 4 and the shell 1 and used for locking the opening state of the opening and closing assembly 4, an unlocking assembly 7 connected between the locking assembly 6 and the ground operation shaft 2 and used for unlocking the opening and closing assembly 4 by the locking assembly 6 in the rotation process of the ground operation shaft 2, and a maintaining assembly 7 connected between the ground operation shaft 2 and the interlocking plate 3 and used for maintaining the interlocking plate 3 in the working state or relieving the maintaining effect on the working state of the interlocking plate 3 when the locking assembly 6 unlocks the opening and closing assembly 4 8. And an interlocking reset part 9 connected between the housing 1 and the interlocking plate 3 for driving the interlocking plate 3 to reset from the working state to the idle state.

As shown in fig. 1 to 5, in order to facilitate controlling the opening and closing of the ground operation hole, the opening and closing assembly 4 includes an operation rotating shaft 41 and a cover plate 42, the operation rotating shaft 41 is disposed parallel to the ground operation shaft 2 and rotatably connected in the housing 1, one axial end of the operation rotating shaft 41 extends out of the front side wall of the housing 1 and is located beside the ground operation hole 21, and the cover plate 42 is eccentrically and fixedly disposed on the operation rotating shaft 41 and can be switched between two states of opening and closing the ground operation hole 21 during the rotation process with the operation rotating shaft 41.

As shown in fig. 1, in order to facilitate the resetting of the operation rotating shaft, the opening and closing assembly 4 further includes an operation torsion spring 43 which is sleeved on the outer circumference of the operation rotating shaft 41 and has two ends acting between the housing 1 and the operation rotating shaft 41 for providing a reverse acting force for resetting the operation rotating shaft 41 from the open state to the closed state.

In order to facilitate the pushing of the interlocking plate, as shown in fig. 4-6 and 12, the synchronizing member 5 is an operation frame eccentrically installed on the operation rotating shaft 41 and located below the interlocking plate 3, a pushing member 51 pressing against the lower side of the interlocking plate 3 is fixedly installed on the operation frame, and the pushing member 51 can push the interlocking plate 3 to rotate around the rotating shaft 31 thereof to an operating state where the pushing protrusion enters the opening 13 in the process of following the rotation of the operation rotating shaft 41.

As shown in fig. 4-6 and 12, in order to facilitate the locking of the opened state, the partition 11 is provided with a straight guide groove 14 extending vertically and penetrating through the front and rear side walls thereof, the locking assembly 6 comprises a first rod 61 extending in the front-back direction and movably penetrating the linear guide groove 14 and capable of moving up and down relative to the linear guide groove 14, a second rod 62 vertically and fixedly connected with one end of the first rod 61 and movably connected with the partition plate 11 up and down, a return spring 63 connected between the partition plate 11 and the second rod 62 and used for providing a downward acting force of the second rod 62, and a rotating body 64 fixedly installed on the operating rotating shaft 41, the first rod 61 is in contact with the outer peripheral wall of the rotating body 64 at the bottom thereof by the return spring 63, and the outer peripheral wall of the rotating body 64 is provided with a groove 641, when the opening and closing assembly 4 is in the open state, the first rod 61 is engaged in the groove 641 by the return spring 63 to limit the rotation of the operation shaft 41.

As shown in fig. 9, in order to release the opened state, the unlocking assembly 7 includes a third rod 71 fixedly disposed at the lower end of the second rod 62 and extending in the left-right direction, and a reset cam 72 fixedly mounted on the ground operating shaft 2 and located below the third rod 71, wherein the reset cam 72 can push the first rod 61 upward to be out of the limit of the groove 641 when rotating to the maximum upward stroke position where the convex portion thereof pushes the third rod 71 upward.

As shown in fig. 9, in order to maintain the operating state of the interlocking plate, an interlocking pin 32 extending in the front-rear direction is further fixedly provided on the interlocking plate 3, the holding member 8 includes an L-shaped driving block 81 slidably connected to the partition plate 11 up and down, a compression spring 82 connected between the L-shaped driving block 81 and the partition plate 11 for providing a force for moving the L-shaped driving block 81 downward, and a locking cam 83 fixedly mounted on the operating shaft 2 and located below the L-shaped driving block 81, a cross bar portion 811 of the L-shaped driving block 81 extends in the left-right direction and is hooked below the interlocking pin 32, and when a protrusion of the locking cam 83 pushes the L-shaped driving block 81 to rise to a maximum stroke position, the interlocking plate 3 maintains the operating state in which a connecting line between a vertex of the protrusion of the locking cam 83 and the center of the operating shaft 2 and a connecting line between a vertex of the protrusion of the reset cam 72 and the center of the operating shaft 2 forms an angle of 90 degrees, so that the two cams can act alternately.

As shown in fig. 1 and 3, in order to facilitate the rotation of the operation rotating shaft, the end of the operation rotating shaft 41 extending out of the housing 1 is further provided with an operation handle 44.

As shown in fig. 13-14, in order to prevent the live switch-on ground knife, an electromagnetic lock a for locking and controlling the cover plate 42 to prevent the cover plate from rotating is further disposed in the housing 1, and the electromagnetic lock a includes a body a1 fixedly mounted in the housing 1, an iron core a2 disposed in the body a1 and capable of moving back and forth relative to the body a1 in a telescopic manner, a circular stopper a3 fixedly disposed at a front end of the iron core a2 and located above the cover plate 42, and an electromagnet for controlling the iron core a2 to extend and retract according to the live condition.

Preferably, the interlocking reset part 9 is an interlocking reset torsion spring which is sleeved on the periphery of the rotating shaft 31 and two ends of which respectively act on the housing 1 and the interlocking plate 3.

The working principle and process of the embodiment are as follows:

circuit breaker capable of preventing false closing

1. As shown in fig. 5, 7, and 8, the operation shaft 41 is rotated counterclockwise by 90 degrees by holding the operation handle 44. The rotating body 64 mounted on the operating shaft 41 pushes up the first rod 61, and when the first rod 61 reaches the highest point of the arc edge of the rotating body 64, the first rod slides into the groove 641 of the rotating body 64 under the action of the return spring 63, the operating shaft 41 is locked, the cover plate 42 leaves the grounding operating hole 21, and the grounding operating hole 21 is exposed;

2. as shown in fig. 5 and 8, when the rotation shaft 41 is rotated and operated, the pushing member 51 of the synchronizing member 5 (i.e., the operation frame) pushes the interlocking plate 3 against the interlocking reset member 9 (i.e., the interlocking reset torsion spring) to rotate the interlocking plate 3 counterclockwise around the rotation shaft 3, and the upper end of the interlocking plate 3 protrudes through the opening 13 of the upper guide rail 12;

3. as shown in fig. 9, the ground operation shaft 2 is rotated clockwise by inserting a ground operation handle (not shown) into the ground operation hole 21. When rotated 90 degrees, the reset cam 72 pushes the third rod 71 to the highest point. The rotating body 61 rotates clockwise by the operation of the torsion spring 43, and the first rod 61 exits the groove 641 to contact the arc edge thereof. The lower edge of the cover plate 42 leans against the grounding operating handle;

4. when the ground operation shaft 2 rotates, the latch cam 83 rotates simultaneously. The L-shaped transmission block 81 jacked up by the locking cam 83 overcomes the pressure spring 82 to ascend, when the locking cam 83 rotates 90 degrees, the L-shaped transmission block 81 ascends to the highest point and just touches the interlocking pin 32 to lock the interlocking plate 3 to keep the interlocking plate in a working state;

5. as shown in fig. 10, the grounding switch is closed by continuing to rotate the grounding operating handle clockwise to 180 degrees. The locking cam 83 keeps the highest point in contact with the L-shaped transmission block, and the reset cam 72 rotates to the lowest point;

6. when the grounding operation handle is taken down from the grounding operation hole 21, the operation rotating shaft 41 returns to the initial state under the action of the operation torsion spring 43 to cover the grounding operation hole 21;

7. after the operation rotating shaft 41 is reset, the first rod body 61 returns to the initial position under the action of the reset spring 63;

8. as shown in fig. 15, since the interlocking plate 3 protrudes out of the guide surface C (i.e., protrudes out of the opening 13) to push the chassis lock plate b1 of the circuit breaker a certain distance to the right, the chassis of the circuit breaker is locked, and the circuit breaker cannot enter the working position from the test position, thereby realizing the function of preventing the circuit breaker from being closed by mistake in the high-voltage switch cabinet.

Interlocking of circuit breaker handcart

As shown in fig. 16, when the circuit breaker handcart is in the working position, the operating handle 44 is rotated counterclockwise, the operating handle 44 drives the interlocking plate 3 to rotate, and since the circuit breaker handcart is in the working position, the operation hole lock plate b2 on the circuit breaker chassis handcart blocks the interlocking plate 3 to rotate, so that the operating handle 44 cannot rotate, and the cover plate 42 keeps a state of blocking the grounding operation hole 21;

thirdly, interlocking when the cable end is electrified (as shown in figures 13-14)

1. When the reverse power transmission condition occurs, when the cable end is electrified, the electromagnet loses the electricity, and the iron core pops out;

2. a circular stop a3 arranged on the electromagnet iron core is stopped above the cover plate 42;

3. when the operating handle 44 is rotated counterclockwise, the operating handle 44 cannot be rotated because the cover plate 42 is stopped by the upper round stopper a3, and the ground operating hole is closed. Effectively preventing the dangerous situation of the electrified earthing knife.

While the utility model has been illustrated and described with respect to specific embodiments and alternatives thereof, it will be understood that various changes and modifications can be made without departing from the spirit and scope of the utility model. It is understood, therefore, that the utility model is not to be in any way limited except by the appended claims and their equivalents.

Claims (10)

1. A preventive handcart earthing switch interlocking device comprises a shell (1), wherein an earthing operation shaft (2) which extends along the front-back direction of the shell (1) and is used for controlling an earthing switch to be switched on or off in the rotating process is rotatably connected in the shell (1), and an earthing operation hole (21) which is used for conveniently connecting and controlling the earthing operation shaft (2) to rotate is formed in the front side wall of the shell (1);

the method is characterized in that: a partition plate (11) which extends along the vertical direction and is vertical to a grounding operation shaft (2) is fixedly arranged in a shell (1), an upper guide rail (12) which extends along the front-back direction is fixedly arranged above the partition plate (11), an opening (13) which is communicated with the left side wall and the right side wall of the upper guide rail (12) is arranged on the upper guide rail (12), an interlocking plate (3) is arranged on the partition plate (11), the interlocking plate (3) is rotatably connected to the partition plate (11) through a rotating shaft (31) which extends along the front-back direction, and a pushing convex part which can extend into the opening (13) in the rotating process around the rotating shaft (31) in a working state or exit from the opening (13) in an idle state is arranged at the upper end part of the interlocking plate (3);

prevention formula handcart earthing knife interlock is still including setting up on casing (1) and being used for controlling ground connection operation hole (21) opening and close subassembly (4) of switching with closing two state, the setting is used for following when opening and close subassembly (4) and interlocking board (3) and opening and close subassembly (4) and move when entering the open mode by closing ground connection operation hole (21) state and pushing interlocking board (3) and get into operating condition by idle state synchronizing part (5), connect and be used for locking the locking subassembly (6) of opening and close the state position of subassembly (4) between opening and close subassembly (4) and casing (1), connect and be used for between locking subassembly (6) and ground connection operation axle (2) and remove unlocking subassembly (7) of locking subassembly (6) to opening and close subassembly (4) locking condition in ground connection operation axle (2) rotation in-process, The interlocking device comprises a holding component (8) and an interlocking reset component (9), wherein the holding component (8) is connected between the grounding operation shaft (2) and the interlocking plate (3) and used for enabling the interlocking plate (3) to be kept in a working state or releasing the holding effect on the working state of the interlocking plate (3) when the locking component (6) unlocks the opening and closing component (4), and the interlocking reset component (9) is connected between the shell (1) and the interlocking plate (3) and used for driving the interlocking plate (3) to be reset to an idle state from the working state.

2. The preventive handcart ground knife interlocking device according to claim 1, characterized in that: open and close subassembly (4) including operation pivot (41) and apron (42), operation pivot (41) parallel ground connection operating axis (2) set up and rotate and connect in casing (1), the axial one end of operation pivot (41) stretches out the preceding lateral wall of casing (1) and is located the side of ground connection operating hole (21), apron (42) eccentric fixation sets up on operation pivot (41) and can switch in opening and closing the two kinds of states of ground connection operating hole (21) along with operation pivot (41) rotation in-process.

3. The preventive handcart ground knife interlocking device according to claim 2, characterized in that: the opening and closing assembly (4) further comprises an operation torsion spring (43) which is sleeved on the periphery of the operation rotating shaft (41) and two ends of which act between the shell (1) and the operation rotating shaft (41) and is used for providing reverse acting force for returning the operation rotating shaft (41) from an opening state to a closing state.

4. The preventive handcart ground knife interlocking device according to claim 1, characterized in that: the synchronous component (5) is an operation frame which is eccentrically arranged on the operation rotating shaft (41) and is positioned below the interlocking plate (3), a pushing component (51) which is pressed against the lower side of the interlocking plate (3) is fixedly arranged on the operation frame, and the pushing component (51) can push the interlocking plate (3) to rotate around the rotating shaft (31) of the interlocking plate to push the convex part to enter the opening (13) in the process of rotating along with the operation rotating shaft (41).

5. The preventive handcart ground knife interlocking device according to claim 4, characterized in that: be equipped with straight line guide slot (14) of vertical extension and through its front and back lateral wall on baffle (11), locking Assembly (6) include along the fore-and-aft direction extend and the activity wear to establish in straight line guide slot (14) can be relative straight line guide slot (14) first body of rod (61) that reciprocates, with first body of rod (61) one end perpendicular fixed connection and with baffle (11) about swing joint's second body of rod (62), connect between baffle (11) and second body of rod (62) and be used for providing reset spring (63) of second body of rod (62) downward action power, and fixed mounting rotor (64) on operation pivot (41), first body of rod (61) its bottom contacts with the periphery wall of rotor (64) under reset spring (63)'s effect to the periphery wall of rotor (64) is equipped with a recess (641), when opening and close subassembly (4) and be in the open mode, the first rod body (61) is clamped into the groove (641) under the action of the return spring (63) to limit the rotation of the operation rotating shaft (41).

6. The preventive handcart ground knife interlocking device according to claim 5, characterized in that: the unlocking assembly (7) comprises a third rod body (71) which is fixedly arranged at the lower end of the second rod body (62) and extends along the left-right direction, and a reset cam (72) which is fixedly installed on the grounding operating shaft (2) and is positioned below the third rod body (71), wherein when the reset cam (72) rotates to the maximum ascending stroke position of the convex part of the reset cam which upwards jacks the third rod body (71), the first rod body (61) can be pushed to upwards separate from the limit of the groove (641).

7. The preventive handcart ground knife interlocking device according to claim 6, characterized in that: the interlocking plate (3) is further fixedly provided with an interlocking pin (32) extending in the front-back direction, the holding assembly (8) comprises an L-shaped transmission block (81) connected with the partition plate (11) in a vertical sliding mode, a pressure spring (82) connected between the L-shaped transmission block (81) and the partition plate (11) and used for providing acting force for enabling the L-shaped transmission block (81) to move downwards, and a locking cam (83) fixedly installed on the grounding operation shaft (2) and located below the L-shaped transmission block (81), a transverse rod portion (811) of the L-shaped transmission block (81) extends in the left-right direction and is hooked below the interlocking pin (32), and when a convex portion of the locking cam (83) pushes the L-shaped transmission block (81) to rise to a maximum stroke position, the interlocking plate (3) is kept in an operating state, wherein a connecting line of a convex portion vertex of the locking cam (83) and the center of the grounding operation shaft (2) and a connecting line of a convex portion vertex of the resetting cam (72) and the center of the grounding operation shaft (2) are 90 degrees The included angle is set, so that the two cams can act in a staggered way.

8. The preventive handcart ground knife interlocking device according to claim 2, characterized in that: the tail end of the operating rotating shaft (41) extending out of the shell (1) is also provided with an operating handle (44).

9. The preventive handcart ground knife interlocking device according to claim 2, characterized in that: still be equipped with in casing (1) and be used for locking control apron (42) to prevent its pivoted electromagnetic lock (a), electromagnetic lock (a) is including body (a1) of fixed mounting in casing (1), locate in body (a1) and can be relative body (a1) front and back flexible iron core (a2) of moving, fixed round bumper (a3) of locating iron core (a2) front end portion and being located apron (42) top and according to the flexible electro-magnet of electrified condition control iron core (a 2).

10. The preventive handcart ground knife interlocking device according to claim 1, characterized in that: the interlocking reset component (9) is an interlocking reset torsion spring which is sleeved on the periphery of the rotating shaft (31) and two ends of the interlocking reset torsion spring respectively act on the shell (1) and the interlocking plate (3).

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