CN110571696B

CN110571696B - Drawer for low-voltage switch cabinet

Info

Publication number: CN110571696B
Application number: CN201910899383.3A
Authority: CN
Inventors: 周慧东; 龙丽
Original assignee: Schneider Electric China Co Ltd
Current assignee: Schneider Electric China Co Ltd
Priority date: 2019-09-23
Filing date: 2019-09-23
Publication date: 2021-01-29
Anticipated expiration: 2039-09-23
Also published as: CN110571696A

Abstract

The invention discloses a drawer for a low-voltage switch cabinet, which comprises a drawer fixing bottom plate and a drawer main body, wherein the drawer fixing bottom plate is fixedly connected to a low-voltage cabinet frame, the drawer main body is connected to the drawer fixing bottom plate in a sliding mode, a manual propelling mechanism, an electric propelling mechanism and a manual and electric mode switching mechanism are arranged on the drawer fixing bottom plate, and the manual and electric mode switching mechanism is used for realizing conversion of the manual propelling mechanism and the electric propelling mechanism of the drawer. The drawer for the low-voltage switch cabinet has the advantages that the drawer not only has the function of manual driving, but also has the function of electric driving, an operator can switch between an electric propulsion mode and a manual propulsion mode according to the actual use condition, the structure is simple and reliable, and the use is convenient.

Description

Drawer for low-voltage switch cabinet

Technical Field

The invention relates to the technical field of low-voltage cabinets, in particular to a drawer for a low-voltage switch cabinet.

Background

In the existing low-voltage drawer cabinet, the drawer is pushed in and pulled out by manual operation, and an operator needs to push and pull the drawer by hands or shake the drawer in and out by shaking a handle before arriving at the switch cabinet. Digitalization and intellectualization have become the development trend of switch equipment, but the drawer structure operated by manpower at present cannot meet the requirements of digitalization and intellectualization of the switch cabinet.

Therefore, it is an urgent technical problem to be solved by the skilled person how to provide an electrically driven drawer, so that the drawer of the low voltage switch cabinet can have both the remote electric driving function and the manual driving function, and the electric driving mode and the manual driving mode can be switched.

Disclosure of Invention

In view of the above, the present invention provides a drawer for a low voltage switchgear, so that the drawer of the low voltage switchgear can have two functions of electric driving and manual driving, and the electric driving mode and the manual driving mode can be switched.

In order to achieve the purpose, the invention provides the following technical scheme:

the utility model provides a drawer for low-voltage switchgear, includes drawer PMKD and drawer main part, drawer PMKD fixed connection is on the low-voltage switchgear frame, drawer main part sliding connection be in on the drawer PMKD, be provided with manual advancing mechanism, electronic advancing mechanism and manual electronic mode switching mechanism on the drawer PMKD, manual electronic mode switching mechanism is used for realizing the conversion of the manual advancing mechanism and the electronic advancing mechanism of drawer.

Preferably, the manual propulsion mechanism and the electric propulsion mechanism each comprise a propulsion device; the pushing device comprises a sliding plate and a driving plate, the driving plate is arranged on one surface, close to the drawer main body, of the drawer fixing bottom plate, and the sliding plate is arranged on one surface, far away from the drawer main body, of the drawer fixing bottom plate; the drawer fixing bottom plate is provided with a sliding strip hole, and the sliding plate and the driving plate are connected to the drawer fixing bottom plate in a sliding mode through a connecting piece penetrating through the sliding strip hole; the sliding plate is fixedly connected with a nut, the nut is in threaded connection with a screw rod, the screw rod is rotationally connected to a first fixing frame, and the first fixing frame is fixedly connected to the drawer fixing bottom plate; the end part of the screw rod, which is far away from the screw nut, is provided with a rotary handle jack.

Preferably, electronic advancing mechanism still includes the motor, the motor sets up drawer PMKD is kept away from on the one side of drawer main part, the output of motor is connected with the reduction gear, the output of reduction gear is connected through clutch and rotation first sprocket on the drawer PMKD is connected, first sprocket passes through drive chain and is connected with the second sprocket transmission, second sprocket fixed connection is in on the lead screw.

Preferably, the manual pushing mechanism further comprises a three-position locking device and a drawer locking device, and the three-position locking device and the drawer locking device are both connected with the pushing device.

Preferably, the three-position locking device comprises a second fixing frame fixedly connected to the drawer fixing bottom plate, a three-position push plate, a locking plate and a first unlocking push plate are slidably connected to the second fixing frame, the three-position push plate is arranged in parallel with the lead screw, the locking plate is arranged perpendicular to the lead screw, one end of the three-position push plate is fixedly connected with the sliding plate, a first positioning column and an unlocking column are arranged on the locking plate, the first positioning column is arranged corresponding to a positioning groove on the three-position push plate, the unlocking column is arranged corresponding to an unlocking groove on the first unlocking push plate, a first return spring is arranged on the locking plate, a second return spring is arranged on the first unlocking push plate, and the end part of the locking plate close to the lead screw is arranged corresponding to a locking block fixedly connected to the lead screw, the circumference of locking piece is provided with the draw-in groove, the tip of lockplate can block in the draw-in groove.

Preferably, the drawer locking device comprises a third fixing frame connected to the side surface inside the drawer main body, a second unlocking push plate, an insertion bolt and an anti-falling plate are connected to the third fixing frame in a sliding manner, a rotating plate is connected to the third fixing frame in a rotating manner, and a connecting structure for connecting the second unlocking push plate, the insertion bolt and the anti-falling plate is arranged on the rotating plate; the lower end of the insertion bolt is matched with the positioning hole in the driving plate; the lower end of the anti-falling plate corresponds to the anti-falling long through hole in the drawer fixing bottom plate.

Preferably, the connecting structure comprises a first hinge column, a second hinge column and a third hinge column, the second unlocking push plate and the insertion bolt are located on one side of the rotating plate, the anti-falling plate is located on the other side of the rotating plate, the first hinge column is arranged at a position where the rotating plate is connected with the second unlocking push plate, the second hinge column is arranged at a position where the rotating plate is connected with the insertion bolt, and the third hinge column is arranged at a position where the rotating plate is connected with the anti-falling plate; and a third return spring is connected to the second unlocking push plate.

Preferably, the drawer fixing bottom plate is provided with a working position micro switch, a test position micro switch and an isolation position micro switch on the surface of the motor, and the working position micro switch, the test position micro switch and the isolation position micro switch are arranged on the drawer fixing bottom plate.

Preferably, the motor is a motor with a self-locking function, and the speed reducer is a speed reducer with a self-locking function, rotates when being powered on, and is self-locked when being powered off.

Preferably, the clutch device comprises a clutch fixing frame which is fixedly connected to the drawer fixing bottom plate, a transmission shaft is rotatably connected to the clutch fixing frame, and the input end of the transmission shaft is connected with the output end of the speed reducer; the shaft section of the transmission shaft, which is positioned between the support plates on the two sides of the clutch fixing frame, comprises a cylindrical shaft section and a polygonal shaft section, the polygonal shaft section is slidably sleeved with a transmission wheel, the cylindrical shaft section is sleeved with the first chain wheel, and the end surfaces, close to each other, of the transmission wheel and the first chain wheel are provided with meshing structures matched for use; and a third return spring is arranged between the driving wheel and the support plate of the clutch fixing frame, and the third return spring is sleeved on the transmission shaft.

Preferably, the manual-electric mode switching mechanism comprises a mode switching lock, the end part of a lock rod of the mode switching lock is rotationally connected with one end of a clutch pulling plate, the other end of the clutch pulling plate is pressed on a flange of the driving wheel, and the clutch pulling plate is connected to the drawer fixing bottom plate in a sliding manner; the mode switching lock is characterized in that one end of a shifting piece is fixedly connected to a lock rod of the mode switching lock, the other end of the shifting piece is used for shifting one end of a push plate, and the other end of the push plate is connected with the manual pushing mechanism.

Preferably, the plate body of the clutch pulling plate and the plate body of the pushing plate are arranged on one side, close to the drawer main body, of the drawer fixing bottom plate, and the connecting end of the clutch pulling plate and the pushing plate penetrates through a through hole in the drawer fixing bottom plate after being bent, so that the clutch pulling plate and the pushing plate are arranged on one side, far away from the drawer main body, of the drawer fixing bottom plate.

Preferably, the push plate is provided with a first baffle plate for blocking the rotary handle insertion hole, and when the electric propulsion mechanism works, the first baffle plate blocks the rotary handle insertion hole.

Preferably, the two sides of the outer bottom surface of the drawer main body are rotatably connected with rollers, and second baffles for guiding the rollers are arranged at positions of the drawer fixing bottom plate corresponding to the rollers.

According to the technical scheme, the drawer for the low-voltage switch cabinet is provided with the manual pushing mechanism and the electric pushing mechanism, the electric pushing mechanism is used for realizing electric driving of the drawer, the manual pushing mechanism is used for realizing manual operation of the drawer, and the manual and electric mode switching mechanism is arranged for ensuring reliable work of the manual pushing mechanism and the electric pushing mechanism and avoiding interference of the two mechanisms. Through the structural arrangement, the drawer for the low-voltage switch cabinet has the manual driving function and the electric driving function, an operator can switch between the electric propulsion mode and the manual propulsion mode according to the actual use condition, and the drawer is simple and reliable in structure and convenient to use.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a drawer for a low-voltage switch cabinet according to an embodiment of the present invention;

FIG. 2 is a schematic view of the front panel of the drawer of FIG. 1;

FIG. 3 is a structural diagram of a drawer fixing bottom plate according to an embodiment of the present invention;

FIG. 4 is a structural diagram of a drawer fixing bottom plate according to another direction provided by the embodiment of the invention;

FIG. 5 is a schematic view of a one-directional mounting structure of a propulsion device according to an embodiment of the present invention;

FIG. 6 is a schematic view of another directional mounting arrangement for a propulsion device according to an embodiment of the present invention;

FIG. 7 is a schematic view of an installation structure of a manual propelling device and a three-position locking device provided by an embodiment of the invention;

FIG. 8 is a schematic view of the mounting structure of FIG. 7 with the first fixing frame removed;

FIG. 9 is a schematic structural diagram of a three-position locking device according to an embodiment of the present invention;

FIG. 10 is a schematic view of the locking plate of FIG. 9 with the locking plate removed;

FIG. 11 is a schematic view of the locking plate of FIG. 9;

FIG. 12 is a schematic structural view of a drawer locking device according to an embodiment of the present invention;

FIG. 13 is a schematic view of the mounting arrangement of the drawer lock of FIG. 12;

FIG. 14 is a schematic structural diagram of an electric propulsion mechanism according to an embodiment of the present invention;

FIG. 15 is a schematic structural diagram of a clutch device according to an embodiment of the present invention;

FIG. 16 is an exploded view of the clutch device of FIG. 15;

fig. 17 is a schematic structural diagram of a manual-electric mode switching mechanism according to an embodiment of the present invention;

FIG. 18 is a schematic structural diagram of a locking block according to an embodiment of the present invention;

fig. 19 is a schematic position diagram of driving plates corresponding to three stations according to an embodiment of the present invention.

Detailed Description

The invention discloses a drawer of a low-voltage switch cabinet, which has two functions of electric drive and manual drive, and the electric drive mode and the manual drive mode can be switched.

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1 to 19, the present invention discloses a drawer for a low voltage switch cabinet, which includes a drawer fixing bottom plate 6 and a drawer main body 1, wherein the drawer fixing bottom plate 6 is fixedly connected to a low voltage cabinet frame.

Wherein, the drawer body 1 is used for containing electrical components. The drawer body 1 is slidably connected to a drawer fixing base plate 6, and the drawer fixing base plate 6 is a metal plate. The drawer fixing bottom plate 6 is provided with a manual propelling mechanism, an electric propelling mechanism and a manual and electric mode switching mechanism, and the manual and electric mode switching mechanism is used for realizing conversion of the manual propelling mechanism and the electric propelling mechanism of the drawer.

According to the drawer for the low-voltage switch cabinet, the drawer fixing bottom plate 6 of the drawer is provided with the manual pushing mechanism and the electric pushing mechanism, the electric pushing mechanism is used for achieving electric driving of the drawer, the manual pushing mechanism is used for achieving manual operation of the drawer, and in order to ensure reliable working of the manual pushing mechanism and the electric pushing mechanism and avoid interference of the two mechanisms, the manual and electric mode switching mechanism is further arranged. Through the structural arrangement, the drawer for the low-voltage switch cabinet has the manual driving function and the electric driving function, an operator can switch between the electric propulsion mode and the manual propulsion mode according to the actual use condition, and the structure is simple and reliable. The electric propulsion mode is a mode of only electrically controlling the position of the drawer; the manual advance mode is a mode in which only the position of the drawer is manually controlled.

Specifically, the manual propulsion mechanism and the electric propulsion mechanism comprise propulsion devices. The pushing device comprises a sliding plate 10 and a driving plate 15, wherein the driving plate 15 is arranged on one surface of the drawer fixing bottom plate 6 close to the drawer main body 1, the sliding plate 10 is arranged on one surface of the drawer fixing bottom plate 6 far away from the drawer main body 1, namely the sliding plate 10 and the driving plate 15 are arranged on two sides of the drawer fixing bottom plate 6. In order to enable the sliding plate 10 to slide with the driving plate 15, the drawer fixing base plate 6 is provided with a sliding elongated hole, and the length direction of the sliding elongated hole is arranged along the sliding direction of the sliding plate 10. In order to prevent the sliding plate 10 and the driving plate 15 from pressing on the side of the drawer fixed bottom plate 6 and affecting the movement of the sliding plate 10 and the driving plate 15 during use, a sleeve 11 is arranged between the sliding plate 10 and the driving plate 15, the sleeve 11 is arranged in the sliding strip hole in a penetrating way, and the sliding plate 10 and the driving plate 15 are connected together through a bolt penetrating through the sleeve 11 and a nut connected on the bolt. It will be appreciated that there is clearance between the outer diameter of the sleeve 11 and the sliding elongate bore to facilitate sliding. Wherein, the bolt can be replaced by a screw. The sliding plate 10 is fixedly connected with a nut 12, the nut 12 is in threaded connection with a screw 13, the screw 13 is rotatably connected to a first fixing frame 14, and the first fixing frame 14 is fixedly connected to the drawer fixing bottom plate 6.

Wherein, the tip that screw 13 kept away from screw 12 is provided with twist grip jack (not shown in the figure), the twist grip jack is used for pegging graft with a tip of external male handle, the handle inserts through the handle connecting hole that is located on the panel of drawer main part 1, rotates the handle is located the one end of panel outside drives advancing device moves, constitutes manual advancing mechanism.

Furthermore, a cover plate 8 is arranged on the outer side of the handle connecting hole, and the cover plate 8 is connected to the position of the handle connecting hole in a sliding mode. It will be understood that the outer side herein refers to the side of the panel away from the drawer body 1. In a specific embodiment, the upper side and the lower side of the handle connecting hole are correspondingly provided with guide grooves, the cover plate 8 is slidably connected in the guide grooves, and when a manual pushing mechanism is needed, the cover plate 8 is slid to be exposed out of the handle connecting hole and inserted into the handle.

Because the first fixing frame 14 is fixedly connected to the drawer fixing bottom plate 6, the screw 13 is rotatably connected to the first fixing frame 14 through a bearing or a bearing bush. When the screw 13 rotates, the screw 12 is driven to move along the axial direction of the screw 13, the sliding plate 10 slides along the sliding slot formed in the drawer fixing bottom plate 6 under the pushing of the screw 12, and the driving plate 15 slides along the sliding slot under the driving of the sliding plate 10 because the driving plate 15 is fixed with the sliding plate 10.

Besides the propelling device in the above embodiment, the electric propelling mechanism further includes a motor 26, and the motor 26 is disposed on a surface of the drawer fixing bottom plate 6 away from the drawer main body 1, that is, on the same surface as the screw 13 of the propelling device. The output end of the motor 26 is connected with a speed reducer 42, the output end of the speed reducer 42 is connected with a first chain wheel 34 which is rotatably connected on the drawer fixing bottom plate 6 through a clutch device 27, the first chain wheel 34 is in transmission connection with a second chain wheel 29 through a transmission chain 28, and the second chain wheel 29 is fixedly connected on a screw rod 13 of the propelling device. In a specific embodiment, the connection position of the screw 13 and the second sprocket 29 is a first hexagonal shaft section, and the connection hole on the second sprocket 29 is a hexagonal hole matched with the first hexagonal shaft section, so that the second sprocket 29 can drive the screw 13 to rotate.

The drawer for the low-voltage switch cabinet provided by the invention has three stations, namely a working station, a test station and an isolation station. In order to monitor the position of the drawer in an electric control process conveniently, a working position micro switch 30, a test position micro switch 31 and an isolation position micro switch 32 are arranged on the surface, where the motor 26 is installed, of the drawer fixing bottom plate 6, the working position micro switch 30, the test position micro switch 31 and the isolation position micro switch 32 are arranged on the drawer fixing bottom plate 6, and through the arrangement of the three micro switches, the position of the sliding plate 10 is monitored, the sliding plate 10 is fixedly connected with the driving plate 15, the driving plate 15 is provided with a positioning hole 151 connected with the drawer main body 1, the corresponding position is moved through monitoring of the sliding plate 10, and the drawer main body 1 connected between the reaction and the reaction is moved to the corresponding position.

Furthermore, in order to conveniently lock the drawer after the electric propulsion mechanism arrives at a corresponding station, the motor 26 is a motor with a self-locking function, the speed reducer 42 is a speed reducer with a self-locking function, and rotates when being powered on, and stops rotating and self-locks when being powered off, so that a transmission system connected with the speed reducer and the screw rod 13 are prevented from rotating, and the locking of the drawer in an electric propulsion mode is further ensured.

Specifically, the on/off of the motor 26 and the power supply circuit is controlled by a controller, which is a single chip microcomputer or a PLC, and is a control element commonly used in the prior art, and is not described herein again. The working position microswitch 30, the test position microswitch 31 and the isolation position microswitch 32 respectively correspond to the working position, the test position and the isolation position of the drawer main body 1. When the sliding plate 10 moves to a corresponding position, namely the drawer main body 1 moves to a corresponding position, the microswitch at the corresponding position is triggered to change the switch state of the microswitch, and the microswitch transmits a signal to the controller; the controller controls the on/off of the power supply of the motor 26 after receiving the signal of the microswitch.

Furthermore, the clutch device 27 includes a clutch holder 33, the clutch holder 33 is fixedly connected to the drawer fixing base 6, a transmission shaft 37 is rotatably connected to the clutch holder 33, and an input end of the transmission shaft 37 is connected to an output end of the speed reducer 42. Specifically, as shown in fig. 15 and 16, a hexagonal counterbore is arranged on the output shaft of the speed reducer 42, and the hexagonal counterbore is matched and inserted with the hexagonal cylinder at the end of the transmission shaft 37. Of course, the hole may also be a pentagonal counter bore or a polygonal shape with other shapes, which is not limited herein as long as the hole can transmit rotation. The shaft section that transmission shaft 37 is located between the both sides extension board of clutch mount 33 includes cylinder shaft section and polygon shaft section 372, the cylinder shaft section includes first cylinder shaft section 371 and second cylinder shaft section 373, and the slip cap is equipped with drive wheel 35 on the polygon shaft section 372, and drive wheel 35 can rotate along with transmission shaft 37, can slide on polygon shaft section 372 again. The transmission shaft 37 is rotatably connected to the two side plates of the clutch fixing frame 33 through the first cylindrical shaft section 371 and the second cylindrical shaft section 373, and the rotatable connection is a bearing bush, a shaft sleeve or a bearing connection commonly used by those skilled in the art, and will not be described herein again. The second cylindrical shaft section 373 is sleeved with a first chain wheel 34, and the end surfaces of the driving wheel 35 and the first chain wheel 34, which are close to each other, are provided with meshing structures used in cooperation. A third return spring 36 is arranged between the transmission wheel 35 and the support plate of the clutch fixing frame 33, and the third return spring 36 is sleeved on the transmission shaft 37. The third return spring 36 is normally compressed to ensure that the meshing structure of the transmission wheel 35 and the first chain wheel 34 mesh together, so that the rotational force is transmitted from the transmission wheel 35 to the first chain wheel 34, and the first chain wheel 34 is in driving connection with the second chain wheel 29 through the transmission chain 28. The second cylindrical shaft segment 373 has an axial diameter smaller than the size of the thinnest position of the polygonal shaft segment 372 to achieve axial positioning of the first sprocket 34.

In a particular embodiment, when the drawer body 1 is moved from the test position to the working position. After the controller receives a command that the drawer main body 1 moves from the test position to the working position, the controller switches on the power supply of the motor 26, the motor is enabled to rotate forwards in the current direction of the motor 26 (assuming that the insertion direction of the drawer main body 1 is enabled to be the forward rotation), the motor 26 and the speed reducer 42 rotate, the first chain wheel 34 drives the transmission chain 28 to move, then the second chain wheel 29 is driven to rotate, the second chain wheel 29 rotates to drive the screw rod 13 to rotate, and then the drawer main body 1 is pushed to move towards the working position. When the drawer body 1 reaches the working position, the sliding plate 10 triggers the state switching of the working position microswitch 30, a switching signal is transmitted to the controller, the controller cuts off the power supply of the motor 26, the motor 26 and the speed reducer 42 stop rotating and are self-locked, so that the drawer body 1 is locked at the working position, and the position locking of the drawer body 1 in the electric propulsion mode is realized.

The manual pushing mechanism comprises a three-position locking device and a drawer locking device besides the pushing device in the above embodiment, and the three-position locking device and the drawer locking device are both connected with the pushing device. The three-station locking device is used for locking and positioning three positions of the drawer main body 1 in a manual pushing mode. The drawer locking device is used for locking between the drawer main body 1 and the driving plate 15. Fig. 19 is a schematic diagram showing the relative positions of the drive plate 15 and the drawer fixing base plate 6 corresponding to three stations, wherein a in fig. 19 is a position diagram of the drive plate 15 in an isolation position, b is a position diagram of the drive plate 15 in a test position, and c is a position diagram of the drive plate 15 in a working position. As a result, the drive plate 15 moves upward, and the three-position movement of the drawer main body 1 connected thereto is realized.

Specifically, as shown in fig. 7-10, the three-position locking device includes a second fixing frame 17 fixedly connected to the drawer fixing bottom plate 6, the second fixing frame 17 is slidably connected to a three-position pushing plate 16, a locking plate 18 and a first unlocking pushing plate 19, the three-position pushing plate 16, the locking plate 18 and the first unlocking pushing plate 19 are all slidably connected to the second fixing frame 17 through a slot at the upper end of the second fixing frame 17, as shown in fig. 9 and 10, the three-position pushing plate 16 is parallel to the lead screw 13, the locking plate 18 is perpendicular to the lead screw 13, three positioning grooves are arranged on the three-position pushing plate 16, and the three positioning grooves are respectively a working position positioning groove, a test position positioning groove and a separation position positioning groove. One end of the three-position push plate 16 is fixedly connected with the sliding plate 10, and the locking plate 18 is provided with a first positioning column and an unlocking column, wherein the first positioning column is used for positioning the positioning groove on the three-position push plate 16. The unlocking column is arranged corresponding to the unlocking groove 191 on the first unlocking push plate. A first return spring is arranged on the locking plate 18, the first return spring is sleeved on a first spring connecting plate on the locking plate 18, one end of the first return spring abuts against the root of the first spring connecting plate, and the other end of the first return spring abuts against a side supporting plate of the second fixing frame 17. And a second return spring is arranged on the first unlocking push plate 19, the second return spring is sleeved on a second spring connecting plate on the first unlocking push plate 19, one end of the second return spring is abutted to the root of the second spring connecting plate, and the other end of the second return spring is abutted to a side supporting plate of the second fixing frame 17. The locking plate 18 is close to the end of the screw rod 13 and is correspondingly arranged with the locking block 20 fixedly connected with the screw rod 13, the locking block 20 is circumferentially provided with a clamping groove 201, and the end of the locking plate 18 penetrates through the side wall of the first fixing frame and is clamped into the clamping groove 201 of the locking block 20. It can be understood that the locking block 20 is provided with a plurality of clamping grooves 201 uniformly distributed in the circumferential direction.

The first return spring and the second return spring are in a compressed state in a normal state, so that the connected structural part is returned.

In order to meet the requirement that the drawer body 1 is locked at three positions, namely an isolation position, a test position and a working position, in a manual pushing mode, the three-position locking device is used. As shown in fig. 7-10. One end of the three-position push plate 16 is fixedly connected to the sliding plate 10, and the three-position push plate 16 slides in the groove of the second fixing frame 17 along with the movement of the sliding plate 10; the lock plate 18 always tends to slide in the direction of the lead screw 13 by the first return spring. When the three-position push plate 16 slides to a position corresponding to one of the three positions, the first positioning column on the locking plate 18 slides into the corresponding positioning groove of the three-position push plate 16, and the unlocking column on the locking plate 18 is positioned in the unlocking groove 191. At this time, the left end of the locking plate 18 is inserted into the slot 201 of the locking block 20, and since the locking block 20 is fixed to the lead screw 13, after the left end of the locking plate 18 is inserted into the slot 201 of the locking block 20, the locking block 20 cannot rotate, and the lead screw 13 is locked and cannot rotate.

As shown in fig. 10, the side edge of the unlocking recess 191 of the first unlocking push plate 19 is provided with a slope 192 and a curved shallow recess 193. One end of the first unlocking push plate 19 close to the panel is in contact with the screw rod unlocking button 7, when unlocking is performed, the screw rod unlocking button 7 is pressed, so that the first unlocking push plate 19 is pushed, the inclined surface 192 of the first unlocking push plate 19 pushes the unlocking column on the locking plate 18, as shown in fig. 7 and 8, the locking plate 18 is moved rightwards, then the left end of the locking plate 18 is moved out of the clamping groove 201 of the locking block 20, the locking block 20 is not prevented from rotating, and the screw rod 13 is unlocked. And the screw rod unlocking button 7 is continuously pressed, and the first unlocking push plate 19 continuously moves until the unlocking column on the locking plate 18 falls into the position of the arc shallow groove 193 of the first unlocking push plate 19. When the screw rod unlocking button 7 is released, the unlocking column of the locking plate 18 is positioned in the arc shallow groove 193 of the first unlocking push plate 19, the locking plate 18 is kept at the position, and the screw rod 13 is in an unlocking state. At the same time, since the lock plate 18 has moved rightward, the first positioning column of the lock plate 18 is moved out of the positioning groove of the three-position push plate 16.

When the slide plate 10 moves to the next station, the inclined surface of the end of the positioning groove of the three-station push plate 16 pushes the first positioning column of the locking plate 18, and the locking plate 18 moves to the right, so that the unlocking column of the locking plate 18 is disengaged from the arc shallow groove 193 of the first unlocking push plate 19; the first unlocking push plate 19 is reset under the action of the second return spring and no longer blocks the locking plate 18. When the sliding plate 10 continues to move to the next station, the first positioning column of the locking plate 18 falls into the positioning groove corresponding to the next station, and the locking plate 18 moves leftwards under the action of the first return spring and is inserted into the slot 201 of the locking block 20, so that the rotation of the screw rod 13 is locked.

When the screw 13 is rotated, the driving plate 15 moves back and forth along the sliding slot opened in the drawer fixing base 6. The driving plate 15 is fixed with the drawer body 1, and when the screw rod 13 rotates, the drawer body 1 moves along with the driving plate 15, so that the drawer body 1 can be inserted and extracted. The drawer locking means is a means for locking the drawer main body 1 and the driving plate 15 together. As shown in fig. 12 and 3, the drawer locking device includes a third fixing frame 21 connected to a side surface of the drawer main body 1, and a second unlocking pushing plate 22, an insertion bolt 23, and an anti-falling plate 25 are slidably connected to the third fixing frame 21. The third fixing frame 21 is rotatably connected with a rotating plate 24, and the rotating plate 24 is provided with a connecting structure for connecting the second unlocking push plate 22, the insertion bolt 23 and the anti-falling plate 25. The lower end of the insertion bolt 23 is matched with the positioning hole 151 on the driving plate 15; the lower extreme of anticreep board 25 corresponds the setting with the anticreep slotted hole on the drawer PMKD 6, and the lower extreme of anticreep board 25 can slide in the anticreep slotted hole. It can be understood that the lower ends of the insertion bolt 23 and the anti-dropping plate 25 pass through the through hole on the bottom plate of the drawer body 1 to achieve the above actions.

Specifically, connection structure includes first articulated post, second articulated post and third articulated post, and second unblock push pedal 22 with insert bolt 23 and be located one side of rotor plate 24, anticreep board 25 is located the opposite side of rotor plate 24, and the position that rotor plate 24 and second unblock push pedal 22 are connected is provided with first articulated post, rotor plate 24 and the position that inserts bolt 23 and be connected are provided with the second articulated post, the position that rotor plate 24 and anticreep board 25 are connected is provided with the third articulated post. A fourth return spring is connected to the second unlocking push plate 22. The one end that second unblock push pedal 22 is located the outside of third mount 21 is provided with the third spring connecting plate, the fourth return spring cover is established on the third spring connecting plate, the one end of fourth return spring is supported the root of third spring connecting plate, and the other end supports on the collateral branch board surface of third mount 21.

Furthermore, a slot is formed in the third fixing frame 21, and the second unlocking push plate 22, the insertion bolt 23 and the anti-falling plate 25 slide in the corresponding slot of the third fixing frame 21. The drawer locking device is installed on the side surfaces of the left and right sides inside the drawer body 1, and one end of the second unlocking push plate 22 close to the panel corresponds to the unlocking button. The first unlocking button 3 is arranged corresponding to the second unlocking push plate 22 of one drawer locking device, and the second unlocking button 5 is arranged corresponding to the second unlocking push plate 22 of the other drawer locking device. One end of the fourth return spring is in contact with the third fixing frame 21, and the other end of the fourth return spring is in interaction with the second unlocking push plate 22, so that the second unlocking push plate 22 is reset after the unlocking button is loosened. The rotating plate 24 is rotatably connected with the third fixing frame 21 through a rotating shaft, the first hinge column, the second hinge column and the third hinge column are corresponding to the notches formed in the corresponding connecting plates, so that when the drawer main body 1 is pressed by the first unlocking button 3 and the second unlocking button 5 on the panel, the two drawer locking devices are respectively pushed, the second unlocking push plate 22 of the drawer locking devices moves, the second unlocking push plate 22 passes through the first hinge column, the rotating plate 24 is driven by the first hinge column to wind the rotating shaft fixedly connected to the third fixing frame 21, then the inserting bolt 23 is driven to move upwards, and meanwhile, the anti-falling plate 25 moves downwards.

When the drawer is used, the drawer body 1 is inserted into the isolation position, the first unlocking button 3 and the second unlocking button 5 on the left side and the right side of the panel of the drawer body 1 are pressed, the insertion bolt 23 is in the lifting position, and the anti-falling plate 25 is in the extending position. The drawer body 1 is pushed, the anti-falling plate 25 is inserted into the anti-falling long through hole on the drawer fixing bottom plate 6 at the moment, and the drawer is continuously pushed until the anti-falling plate 25 collides with the edge of the anti-falling long through hole on the drawer fixing bottom plate 6 and stops. At this time, the first unlocking button 3 and the second unlocking button 5 are released, the second unlocking push plate 22 is reset under the action of the fourth return spring on the second unlocking push plate 22, meanwhile, the anti-falling plate 25 retracts to the original state, the insertion bolt 23 is reset, the lower end of the insertion bolt 23 is inserted into the positioning hole 151 in the end part of the drive plate 15, and the drawer main body 1 and the drive plate 15 are locked into a whole. At this time, the drawer body 1 moves according to the movement of the driving plate 15. When drawer body 1 leaves the spacing position and removes to experimental position, because of anticreep board 25 removes along with the drawer, takes place relative displacement with drawer PMKD 6, if press again this moment first unblock button 3 and second unblock button 5 on the panel, because of anticreep board 25 and drawer PMKD 6 on the anticreep slotted hole no longer corresponds, and anticreep board 25's lower extreme can not stretch out again, then rotor plate 24 is unable to rotate, consequently the unblock button can't be pressed, and drawer body 1 can't be thrown off from drive plate 15. That is, the drawer body 1 can be pressed only by the first unlocking button 3 and the second unlocking button 5 when the drawer body is in the isolation position, and the drawer body 1 can be drawn out from the low-voltage cabinet.

In order to ensure that the drawer body 1 can smoothly enter and exit, the two sides of the outer bottom surface of the drawer body 1 are rotatably connected with idler wheels, and second baffle plates 43 used for guiding the idler wheels are arranged at the positions, corresponding to the idler wheels, of the drawer fixing bottom plate 6.

The main working mode of the drawer of the low-voltage switch cabinet is an electric driving mode, but when a control loop or a motor part has problems, a manual propelling device is required to be used for operation. In the manual propelling mode, the screw rod 13 cannot rotate due to self-locking of the motor 26 and the speed reducer 42; in the electric mode, the in-place position of the drawer main body 1 is provided by micro switches at three positions, and the three-position locking device is not needed; and the unlocking of the three-position locking device is realized manually, the three-position locking device interferes with the electric propulsion mechanism, and the three-position locking mechanism and the screw rod 13 are disconnected in the electric mode, so that the manual and electric mode switching mechanism is required to be arranged to realize the switching of two modes.

Specifically, as shown in fig. 17, the manual/electric mode switching mechanism includes a mode switching lock 40, an end of a lock lever of the mode switching lock 40 is rotatably connected to one end of a clutch pulling plate 38, and the other end of the clutch pulling plate 38 is pressed on a surface of a flange of the driving wheel 35 away from the mode switching lock 40, so that the clutch pulling plate 38 can pull the driving wheel 35 to disengage from the end surface of the first chain wheel 34, and the clutch pulling plate 38 is slidably connected to the drawer fixing bottom plate 6; one end of a shifting sheet 39 is fixedly connected to a lock rod of the mode switching lock 40, the other end of the shifting sheet 39 is used for shifting one end of a push plate 41, and the other end of the push plate 41 is connected with a lock plate 18 of the manual pushing mechanism. The model switching lock 40 is a lock of 3SJ.MS816-4D-4 produced by the senior group, and the lock rod can rotate and stretch when the lock is turned by a key.

Wherein, the plate body of separation and reunion arm-tie 38 and the plate body of push pedal 41 all set up in one side that drawer fixed baseplate 6 is close to drawer main part 1, and the through-hole that sets up on drawer fixed baseplate 6 is passed after the connection of separation and reunion arm-tie 38 and push pedal 41 is all buckled to the setting is kept away from one side of drawer main part 1 at drawer fixed baseplate 6, in order to make things convenient for the connection of each fixed bolster, avoids mutual interference. The push plate 41 is provided with a first baffle 8 for blocking the rotary handle jack, and when the electric propulsion mechanism works, the first baffle 8 blocks the rotary handle jack to prevent misoperation. The right end of the push plate 41 is in contact with a projection on the locking plate 18 to push against the locking plate 18 or disengage from the locking plate 18 during operation.

When the mechanism is switched from the manual mode to the electric mode, the key is inserted into the switch lock hole 9 of the panel, and the key cylinder of the mode switch lock 40 is rotated counterclockwise. The lock rod of the mode switching lock 40 extends upwards while rotating anticlockwise, and pushes the clutch pull plate 38 to slide upwards; the upper end of the clutch pull plate 38 no longer presses the transmission wheel 35, and the transmission wheel 35 slides upward along the transmission shaft 37 under the action of the third return spring 36, engages with the end face of the first sprocket 34 and is kept engaged under the action of the third return spring 36. That is, the counterclockwise rotation mode switching lock 40 is in place, the clutch means is in an engaged state, and the power of the motor 26 is transmitted to the lead screw 13 through the first sprocket 34. I.e., the motoring mode, rotation of the lead screw 13 is provided by the motor 26. Since the shifting piece 39 is fixed with the lock rod of the mode switch lock 40, when the lock rod of the mode switch lock 40 rotates counterclockwise, the shifting piece 39 pushes the push plate 41 to slide rightward, and then pushes the locking plate 18 of the three-position locking device to slide rightward, so that the left end of the locking plate 18 is far away from the locking block 20. When the lock cylinder of the mode switching lock 40 rotates counterclockwise to a proper position, the lock plate 18 is completely separated from the lock block 20, that is, the three-position locking device does not work any more in the electric mode, and the screw rod 13 cannot be locked any more. The movement and stopping of the drawer body 1 is controlled entirely by the motor 26. The first baffle 8 of the push plate 41 blocks the rotary handle insertion hole, the operating handle cannot be inserted, and the movement of the drawer body 1 can only be driven by the motor 26.

When the mechanism is switched from the electric mode to the manual mode, the lock cylinder of the mode switching lock 40 is rotated clockwise, and the lock bar of the mode switching lock 40 is retracted downward while the lock bar of the mode switching lock 40 is rotated clockwise; the clutch pull rod 38 is pulled to slide downwards, and because the upper end of the clutch pull plate 38 presses on the flange surface of the transmission wheel 35, when the clutch pull plate 38 slides downwards, the transmission wheel 35 is pulled to slide downwards along the transmission shaft 37, so that the meshing between the transmission wheel 35 and the first chain wheel 34 is disengaged. I.e., the clockwise 40 mode shift lock is in place, the clutch is disengaged and there is no drive relationship between the first sprocket 34 and the motor 26, i.e., the motor 26 is disengaged in the manual mode. Meanwhile, the lock lever of the mode switching lock 40 rotates clockwise to drive the shifting piece 39 to rotate clockwise, and then the push plate 41 is driven to slide leftwards, and the right end of the push plate 41 is separated from the locking plate 18. Namely, the three-station locking mechanism recovers the locking function of the screw rod 13 in the manual mode; in-place locking of the drawer body 1 in the manual mode is achieved by the three-position locking mechanism. Meanwhile, the first baffle 8 on the push plate 41 no longer blocks the rotary handle insertion hole, the operating handle can be inserted, and the movement of the drawer main body 1 can be manually driven through the handle.

The above electric mode is abbreviated as electric propulsion mode, and the manual mode is abbreviated as manual propulsion mode.

In addition, in other embodiments, a circuit breaker operation knob 2 and a position indication window 4 may be further disposed on the panel as needed, the circuit breaker operation knob 2 is used to operate a circuit breaker placed in the drawer main body 1, and the position indication window 4 is used to indicate a position (a test position, an isolation position, or a working position) of the drawer main body 1. For the convenience of operation, a handle for pulling the drawer body 1 is further arranged on the panel.

In the description of the present solution, it is to be understood that the terms "upper", "lower", "vertical", "inside", "outside", "left", "right", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present solution.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.

The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A drawer for a low-voltage switch cabinet comprises a drawer fixing bottom plate and a drawer main body, wherein the drawer fixing bottom plate is fixedly connected to a low-voltage cabinet frame, and the drawer main body is connected to the drawer fixing bottom plate in a sliding manner;

the manual pushing mechanism and the electric pushing mechanism both comprise pushing devices, each pushing device comprises a sliding plate and a driving plate, the driving plate is arranged on one surface, close to the drawer main body, of the drawer fixing bottom plate, and the sliding plate is arranged on one surface, far away from the drawer main body, of the drawer fixing bottom plate; the drawer fixing bottom plate is provided with a sliding strip hole, and the sliding plate and the driving plate are connected to the drawer fixing bottom plate in a sliding mode through a connecting piece penetrating through the sliding strip hole; the sliding plate is fixedly connected with a nut, the nut is in threaded connection with a screw rod, the screw rod is rotationally connected to a first fixing frame, and the first fixing frame is fixedly connected to the drawer fixing bottom plate;

the manual propelling mechanism further comprises a three-position locking device, and the three-position locking device is connected with the propelling device;

three station locking means include fixed connection be in second mount on the drawer PMKD, sliding connection has three station push pedals, lockplate and first unblock push pedal on the second mount, the one end of three station push pedals with sliding plate fixed connection, be provided with first reference column and unblock post on the lockplate, first reference column with positioning groove in the three station push pedals corresponds the setting, the unblock post with unblock recess in the first unblock push pedal corresponds the setting, be provided with first return spring on the lockplate, be provided with second return spring in the first unblock push pedal, the lockplate is close to the tip of lead screw with fixed connection's locking piece corresponds the setting on the lead screw, the circumference of locking piece is provided with the draw-in groove, the tip of lockplate can block into in the draw-in groove.

2. The drawer for the low-voltage switch cabinet according to claim 1, wherein a rotary handle insertion hole is formed in the end, far away from the screw nut, of the screw rod.

3. The drawer for the low-voltage switch cabinet according to claim 1, wherein the electric propulsion mechanism further comprises a motor, the motor is disposed on a surface of the drawer fixing bottom plate, which is far away from the drawer main body, an output end of the motor is connected with a speed reducer, an output end of the speed reducer is connected with a first chain wheel, which is rotatably connected to the drawer fixing bottom plate, through a clutch device, the first chain wheel is in transmission connection with a second chain wheel through a transmission chain, and the second chain wheel is fixedly connected to the screw rod.

4. The drawer for low-voltage switchgear cabinets of claim 1, characterized in that said manual advance mechanism further comprises a drawer locking device connected to said advance device.

5. The drawer for the low-voltage switch cabinet as claimed in claim 1, wherein the three-position push plate is arranged in parallel with the screw rod, and the locking plate is arranged perpendicular to the screw rod.

6. The drawer for the low-voltage switch cabinet according to claim 4, wherein the drawer locking device comprises a third fixing frame connected to the side surface inside the drawer main body, a second unlocking push plate, an insertion bolt and an anti-falling plate are connected to the third fixing frame in a sliding manner, a rotating plate is connected to the third fixing frame in a rotating manner, and a connecting structure for connecting the second unlocking push plate, the insertion bolt and the anti-falling plate is arranged on the rotating plate; the lower end of the insertion bolt is matched with the positioning hole in the driving plate; the lower end of the anti-falling plate corresponds to the anti-falling long through hole in the drawer fixing bottom plate.

7. The drawer for the low-voltage switch cabinet according to claim 6, wherein the connecting structure comprises a first hinge column, a second hinge column and a third hinge column, the second unlocking push plate and an insertion bolt are positioned on one side of the rotating plate, the anti-falling plate is positioned on the other side of the rotating plate, the first hinge column is arranged at a position where the rotating plate is connected with the second unlocking push plate, the second hinge column is arranged at a position where the rotating plate is connected with the insertion bolt, and the third hinge column is arranged at a position where the rotating plate is connected with the anti-falling plate; and a third return spring is connected to the second unlocking push plate.

8. The drawer for the low-voltage switch cabinet according to claim 3, wherein a working position micro switch, a test position micro switch and an isolation position micro switch are arranged on the surface of the drawer fixing bottom plate, on which the motor is installed, and the working position micro switch, the test position micro switch and the isolation position micro switch are arranged on the drawer fixing bottom plate.

9. The drawer for the low-voltage switch cabinet according to claim 3, wherein the motor is a motor with a self-locking function, and the speed reducer is a speed reducer with a self-locking function and rotates when being powered on and is self-locked when being powered off.

10. The drawer for the low-voltage switch cabinet according to claim 3, wherein the clutch device comprises a clutch fixing frame, the clutch fixing frame is fixedly connected to the drawer fixing bottom plate, a transmission shaft is rotatably connected to the clutch fixing frame, and an input end of the transmission shaft is connected with an output end of the speed reducer; the shaft section of the transmission shaft, which is positioned between the support plates on the two sides of the clutch fixing frame, comprises a cylindrical shaft section and a polygonal shaft section, the polygonal shaft section is slidably sleeved with a transmission wheel, the cylindrical shaft section is sleeved with the first chain wheel, and the end surfaces, close to each other, of the transmission wheel and the first chain wheel are provided with meshing structures matched for use; and a third return spring is arranged between the driving wheel and the support plate of the clutch fixing frame, and the third return spring is sleeved on the transmission shaft.

11. The drawer for the low-voltage switch cabinet as claimed in claim 10, wherein the manual-electric mode switching mechanism comprises a mode switching lock, an end of a lock rod of the mode switching lock is rotatably connected with one end of a clutch pull plate, the other end of the clutch pull plate is pressed on a flange of the transmission wheel, and the clutch pull plate is slidably connected on the drawer fixed bottom plate; the mode switching lock is characterized in that one end of a shifting piece is fixedly connected to a lock rod of the mode switching lock, the other end of the shifting piece is used for shifting one end of a push plate, and the other end of the push plate is connected with the manual pushing mechanism.

12. The drawer for the low-voltage switch cabinet according to claim 11, wherein the plate body of the clutch pull plate and the plate body of the push plate are both disposed on one side of the drawer fixing bottom plate close to the drawer main body, and the connection end of the clutch pull plate and the push plate is bent and then penetrates through a through hole disposed on the drawer fixing bottom plate, so as to be disposed on one side of the drawer fixing bottom plate far away from the drawer main body.

13. The drawer for the low-voltage switch cabinet as claimed in claim 11, wherein the push plate is provided with a first baffle plate for blocking the rotating handle insertion hole, and the first baffle plate blocks the rotating handle insertion hole when the electric propulsion mechanism works.

14. The drawer for the low-voltage switch cabinet according to claim 1, wherein rollers are rotatably connected to two sides of the outer bottom surface of the drawer main body, and a second baffle plate for guiding the rollers is arranged at a position of the drawer fixing bottom plate corresponding to the rollers.