CN-116799682-B - Prevention type interlocking device for ground knife handcart

CN116799682BCN 116799682 BCN116799682 BCN 116799682BCN-116799682-B

Abstract

The invention relates to the field of switch cabinets, in particular to a preventive interlocking device for a ground knife handcart. Including the curb plate, be equipped with preceding folded plate on the curb plate, be equipped with the operation hole on the preceding folded plate, fixedly on the curb plate be provided with the guide rail, be equipped with two through-holes on the guide rail, be provided with telescopic movable block respectively in two through-holes, vertical sliding connection has the slide on the preceding folded plate, still be connected with the interlocking subassembly between slide and the two movable blocks, and drive two through-holes of two movable block synchronous protrusion guide rails through the interlocking subassembly, fixedly be provided with the mounting panel in the curb plate, the rotation is connected with the operating axle on the mounting panel, the other main shaft that is equipped with relative mounting panel rotation setting of operating axle, still be connected with drive mechanism between operating axle and the main shaft, the operating axle can follow its axial direction flexible activity. The invention has good reliability and can not damage the accessories in the interlocking.

Inventors

WEI JUN
LIN FAGUANG
HU ZONGSHAN
XIE GUIYUN

Assignees

福建森达电气股份有限公司

Dates

Publication Date: 20260505
Application Date: 20230629

Claims (8)

1. The preventive interlocking device for the ground knife handcart is characterized by comprising a side plate, wherein a front folded plate is arranged on the side plate, an operation hole is formed in the front folded plate, a guide rail extending along the front-back direction is fixedly arranged on the side plate, an upper through hole and a lower through hole are formed in the guide rail, telescopic movable blocks are respectively arranged in the two through holes, a sliding plate is vertically and slidably connected onto the front folded plate, an interlocking assembly is further connected between the sliding plate and the two movable blocks, the sliding plate shields the operation hole in the sliding state, the interlocking assembly drives the two through holes of the guide rail to synchronously protrude out of the two movable blocks, the sliding plate opens the operation hole in the sliding state, and the interlocking assembly drives the two movable blocks to synchronously retract into the two through holes of the guide rail; the side plate is fixedly provided with a mounting plate, the mounting plate is rotationally connected with an operation shaft, a main shaft which is rotationally arranged relative to the mounting plate and used for controlling the opening and closing actions of the grounding switch is arranged beside the operation shaft, and a transmission mechanism is also connected between the operation shaft and the main shaft and used for driving the main shaft to rotate along with the operation shaft in the rotation process of the operation shaft; The operation shaft can stretch and retract along the axial direction of the operation shaft, when the back door is closed, the operation shaft can move towards the operation hole under the action of the pressure of the back door, an elastic piece for driving the operation shaft to reversely reset is also connected between the operation shaft and the side plate, and when the back door is opened, the operation shaft is far away from the operation hole under the action of the elastic piece; The main shaft is also fixedly provided with a stop pin, the sliding plate is also fixedly provided with a limit part corresponding to the stop pin, the stop pin of the main shaft is provided with a limit state for clamping the limit part and a release state for releasing the limit part in the forward and backward rotation process, and when the main shaft rotates along one direction and controls the grounding switch to be switched on, the stop pin clamps the limit part to limit the sliding plate to move upwards; The interlocking assembly comprises a control assembly and a connecting rod mechanism, wherein the control assembly is used for controlling two movable blocks to synchronously extend out of two through holes or retract into the two through holes respectively, the connecting rod mechanism is connected between a sliding plate and the control assembly and comprises a V-shaped crank arm, a transmission pull plate and a sliding block, the sliding block is connected with the guide rail in a sliding manner along the extending direction of the guide rail, the transmission pull plate is fixedly arranged with the sliding block, the middle part of the V-shaped crank arm is arranged in a rotating manner relative to the guide rail, the two arms of the V-shaped crank arm are hinged with the sliding plate and the transmission pull plate through pin shafts respectively, and the control assembly is controlled by the sliding change of the sliding block; The sliding plate drives the sliding block to slide towards the direction close to the front folded plate through the V-shaped crank arm and the transmission pulling plate when the sliding plate slides downwards, so that the sliding block driving control assembly drives the two movable blocks to protrude out of the two through holes, and drives the sliding block to slide towards the direction far away from the front folded plate through the V-shaped crank arm and the transmission pulling plate when the sliding plate slides upwards, so that the sliding block driving control assembly drives the two movable blocks to retract into the two through holes.
2. The preventive interlocking device of the ground knife handcart of claim 1, wherein the transmission mechanism comprises a driving pinion sleeved on the periphery of the operation shaft and synchronously rotating with the operation shaft, and a main shaft big gear fixedly arranged with the main shaft, and the driving pinion is meshed with the main shaft big gear for transmission; The periphery of the operation shaft is also sleeved with two unidirectional needle bearings, the driving pinion is fixedly sleeved on the outer rings of the two unidirectional needle bearings, the two unidirectional needle bearings are in clearance fit with the operation shaft, and the two unidirectional needle bearings are respectively installed in a positive-to-negative mode.
3. The preventive interlocking device for the ground knife handcart, which is disclosed in claim 2, is characterized in that the operation shaft is connected with the side plate in a rotating way through two operation shaft sleeves, the operation shaft sleeves are fixedly arranged relative to the mounting plate, the operation shaft is movably arranged in the two operation shaft sleeves in a penetrating way, and the two unidirectional needle bearings and the driving pinion are arranged between the two operation shaft sleeves.
4. The preventive interlocking device of the ground knife handcart, which is characterized in that a necking part with the diameter smaller than that of other sections is further arranged on the operation shaft, the length of the necking part is longer than the width of a single one-way needle bearing, when the rear door is opened, the necking part of the operation shaft is positioned at the relative position of one-way needle bearing under the action of the elastic piece, and when the rear door is closed, the necking part of the operation shaft is separated from the relative position of the corresponding one-way needle bearing.
5. The preventive interlocking device for the ground knife handcart of claim 1, wherein the mounting plate is further connected with a back door pushing plate in a sliding manner, the back door pushing plate is arranged in parallel with the axis direction of the mounting plate, one end of the back door pushing plate is propped against one end of the operating shaft far away from the operating hole, and the other end of the back door pushing plate is fixedly provided with a back door propping pin which is propped against the back door when the back door is closed.
6. The preventive interlocking device of the ground knife handcart, which is disclosed in claim 1, is characterized in that the control assembly comprises an interlocking box, a transmission plate, a reset pressure spring, an inner carriage and a push plate, wherein the two movable blocks are a locking block and a locking plate bridge respectively, the interlocking box is fixedly arranged on a guide rail, a linear guide groove extending along the front-back direction is arranged on the sliding block, two guide nails which are arranged at intervals in the front-back direction are also fixedly arranged on the locking plate bridge, the guide nails extend along the left-right direction, and the two guide nails are arranged in the linear guide groove of the sliding block in a penetrating manner, so that the sliding block can only slide forwards and backwards relative to the interlocking box; The inner carriage is fixed with the interlocking box and extends to one end of the two guide nails, two ends of the guide nails are respectively fixed with the inner carriage and the interlocking box, the transmission plate is respectively movably connected to the two guide nails through two hole sites, the locking plate bridge is also respectively movably connected to the two guide nails through the two hole sites and positioned between the transmission plate and the inner carriage, the transmission plate can push the locking plate bridge to move together when being stressed along the guiding direction of the guide nails and sliding towards the position close to the inner carriage, the locking plate bridge can protrude out of the corresponding through holes of the guide rail, the number of the two reset pressure springs is two and are respectively sleeved on the two guide nails, and the two ends of the reset pressure springs are respectively propped between the inner carriage and the locking plate bridge for providing reverse reset force; the push plate is fixed on the sliding block, a sliding groove used for guiding the locking block to stretch left and right is arranged on the push plate, the sliding groove comprises a wire groove extending along the front-back direction and a chute connected with the wire groove and extending obliquely along the direction away from the bridge of the locking plate, the locking block is positioned above the push plate, the locking block is fixedly connected with a pin column extending downwards, the pin column is movably arranged in the sliding groove of the push plate in a penetrating manner, and the pin column is also fixed with the transmission plate; When the sliding block slides towards the direction close to the front folded plate, the pin is positioned at the slot position of the sliding slot in the push plate, so that the locking block and the locking plate bridge simultaneously protrude out of the two through holes of the guide rail, and when the sliding block slides towards the direction far away from the front folded plate, the pin is positioned at the slot position of the sliding slot in the push plate, so that the locking block and the locking plate bridge simultaneously condense in the two through holes of the guide rail.
7. The preventive interlocking device of the ground knife handcart of claim 6, wherein a reset tension spring is further connected between the transmission pulling plate and the interlocking box.
8. The preventive interlocking device of the ground knife handcart, which is disclosed in claim 1, is characterized in that a second sliding groove extending vertically is arranged on the front folded plate, a handle penetrating through the second sliding groove is arranged on the sliding plate, a padlock plate used for being connected with the handle in an upward sliding position is also connected to the front folded plate in a rotating mode, and lock holes are formed in the padlock plate and the handle.

Description

Prevention type interlocking device for ground knife handcart Technical Field The invention relates to the field of switch cabinets, in particular to a preventive interlocking device for a ground knife handcart. Background In order to prevent accidents, some conventional switch cabinets are provided with passive forced limit interlocks, namely, the operation is stopped by forced limit in the middle of misoperation, the damage of the passive forced limit interlocks to a main shaft is extremely large, the main shaft is easy to deform, and the switch cabinets are partially protected by using electrical equipment in an electromagnetic lock mode and a travel switch, but the reliability of the electrical equipment is relatively lower than that of mechanical interlocking. Disclosure of Invention The invention aims to provide a preventive interlocking device for a ground knife handcart, which has good reliability and does not damage accessories in interlocking. The invention is realized by the following technical scheme that the preventive interlocking device of the ground knife handcart is characterized by comprising a side plate, wherein a front folded plate is arranged on the side plate, an operation hole is formed in the front folded plate, a guide rail extending along the front-back direction is fixedly arranged on the side plate, two through holes are formed in the guide rail, telescopic movable blocks are respectively arranged in the two through holes, a sliding plate is vertically and slidably connected to the front folded plate, an interlocking assembly is further connected between the sliding plate and the two movable blocks, the sliding plate shields the operation hole in an upward sliding state, the two movable blocks are driven to synchronously protrude out of the two through holes of the guide rail through the interlocking assembly, the sliding plate opens the operation hole in a downward sliding state, and the two movable blocks are driven to synchronously retract into the two through holes of the guide rail through the interlocking assembly; the side plate is fixedly provided with a mounting plate, the mounting plate is rotationally connected with an operation shaft, a main shaft which is rotationally arranged relative to the mounting plate and used for controlling the opening and closing actions of the grounding switch is arranged beside the operation shaft, and a transmission mechanism is also connected between the operation shaft and the main shaft and used for driving the main shaft to rotate along with the operation shaft in the rotation process of the operation shaft; the operation shaft can stretch out and draw back along its axial direction, and when the back door was closed, the operation shaft can be close to the operation hole activity under the effect of back door pressure, still be connected with the elastic component that is used for driving the reverse reset of operation shaft between operation shaft and the curb plate, the back door is when opening, and the operation shaft is kept away from the operation hole under the effect of elastic component. The preventive interlocking device for the ground knife handcart provided by the invention adopts an active pre-prevention mode, namely, the operating shaft automatically retracts under the condition that the operating condition of the ground switch is not met, so that the operating handle cannot be sleeved on the operating shaft, the purpose that the ground switch cannot be misoperation is ensured, or the ground operating hole cannot be opened under the shielding of the sliding plate, therefore, any spare and accessory parts in interlocking cannot be damaged, and the reliability is high by adopting a mechanical linkage structure. As a further improvement, the main shaft is also fixedly provided with a stop pin, the sliding plate is also fixedly provided with a limit part corresponding to the stop pin, the stop pin of the main shaft is provided with a limit state for clamping the limit part and a release state for releasing the limit part in the forward and reverse rotation process, and when the main shaft rotates along one direction and controls the grounding switch to be switched on, the stop pin clamps the limit part to limit the sliding plate to move upwards. As a further improvement, the transmission mechanism comprises a driving pinion sleeved on the periphery of the operation shaft and synchronously rotating with the operation shaft, and a main shaft big gear fixedly arranged with the main shaft, wherein the driving pinion is in meshed transmission with the main shaft big gear, and the transmission ratio of the driving pinion to the main shaft big gear is 1:2 in an optimal way. The pinion is adopted to drive the large gear to move, and compared with the existing crank arm direct transmission or bevel gear transmission, the operation is easier and more labor-saving. The periphery of the operation shaft is also sleeved with two unidire