Drawer type power distribution cabinet for large-scale power grid

Abstract

The invention discloses a drawer type power distribution cabinet for a large-scale power grid, and the cabinet comprises a cabinet body and a plurality of drawers, the cabinet body is provided with a first panel, a second panel, a cabinet body backboard and two cabinet body side plates, the cabinet body is provided with a plurality of installation positions, the number of the installation positions is equal to the number of the drawers, the installation positions and the drawers are in one-to-one correspondence, and the second panel is provided with a plurality of drawer jacks. A plurality of supporting cross rods are arranged on the first panel; the drawer is provided with a drawer side electric connecting piece, and the cabinet body is provided with a plurality of cabinet body side electric connecting pieces which can be connected with the drawer side electric connecting piece. According to the power distribution cabinet, accurate heat dissipation of a certain drawer can be achieved, it is ensured that all electrical elements work at the safe temperature, and the service life of equipment is prolonged. And the drawer can be prevented from being completely pulled out accidentally, but the drawer can be completely pulled out after active operation.

Description

Technical Field

[0001] The present invention relates to the technical field of power distribution cabinets, and more specifically, to a drawer-type power distribution cabinet for large-scale power grids. Background Art

[0002] Drawer-type power distribution cabinets are modular, easy-to-maintain power distribution equipment, particularly suitable for applications requiring high power continuity and maintenance efficiency. They play a vital role in large-scale power grids, such as large substations, data centers, industrial park distribution centers, and large commercial buildings. Core electrical components within the cabinet, such as circuit breakers, contactors, fuses, protective relays, and meters, are pre-installed in separate drawers.

[0003] Existing drawer-type power distribution cabinets sometimes experience excessive heat buildup in the drawers. Typical cabinets lack active cooling or are unable to precisely target specific drawers. This localized overheating not only accelerates the aging of the insulation within the drawer, reducing the performance and lifespan of electrical components, but in severe cases can even cause safety hazards such as electrical fires, posing a significant threat to the equipment. Furthermore, maintenance personnel often need to pull the drawer out of the cabinet during maintenance. Sometimes, due to operator error, the drawer is accidentally pulled completely out, causing it to fall out of the cabinet. This can easily damage the drawer and the electrical components within it, resulting in costly equipment losses. Summary of the Invention

[0004] The present invention aims to overcome the defects of the prior art and provide a drawer-type power distribution cabinet for large-scale power grids.

[0005] In order to achieve the above-mentioned objectives, the present invention provides the following technical solutions: a power distribution cabinet, comprising a cabinet body and a plurality of drawers, the cabinet body having a first panel, a second panel, a cabinet back panel and two cabinet side panels, the cabinet body having a plurality of mounting positions, the number of the mounting positions being equal to the number of drawers and the two corresponding one to one, the second panel having a plurality of drawer jacks, the first panel having a plurality of supporting cross bars; the drawer having a drawer-side electrical connector, the cabinet body having a plurality of cabinet-side electrical connectors that can be connected to the drawer-side electrical connector.

[0006] Furthermore, the support cross bar is provided with a roller.

[0007] This allows the roller to contact the drawer bottom plate, making it easier to pull the drawer out.

[0008] Furthermore, a wireless communication unit is installed in the cabinet.

[0009] This enables wireless communication.

[0010] Furthermore, the number of the cabinet-side electrical connectors is equal to the number of the mounting positions and the two correspond one to one.

[0011] Furthermore, the drawer-side electrical connector includes a moving contact and a secondary plug; the cabinet-side electrical connector includes a static contact and a secondary socket.

[0012] Furthermore, the drawer is provided with an operating handle and an unlocking mechanism, the operating handle can control the electrical connection between the drawer side electrical connector and the cabinet side electrical connector to disconnect the electrical connection, and the unlocking mechanism can unlock the drawer and the cabinet so that the drawer can be pulled out of the cabinet.

[0013] The operating handle and the unlocking mechanism are both common technical means in this field. The operating handle and the adjacent driving mechanism can adopt any feasible structure in the existing technology, and the unlocking mechanism can adopt any feasible structure in the existing technology.

[0014] Furthermore, the operating handle can achieve three-position control, and the three positions include a connection position, a test position and a disconnection position. For the connection position, the moving contact and the static contact are electrically connected, and the secondary plug and the secondary socket are electrically connected; for the test position, the moving contact and the static contact are electrically disconnected, and the secondary plug and the secondary socket are electrically connected; for the disconnection position, the moving contact and the static contact are electrically disconnected, and the secondary plug and the secondary socket are disconnected.

[0015] Furthermore, a temperature sensor and a humidity sensor are installed in the drawer; a lifting drive mechanism is installed on the cabinet body, and the lifting drive mechanism drives a lifting seat, a mounting seat and two fan units are installed on the lifting seat, an image acquisition unit is installed on the mounting seat, and the fan unit includes an air inlet duct and an air outlet duct; the mounting position has two ventilation ducts, multiple first heat dissipation holes and multiple second heat dissipation holes, the ventilation duct is installed on the second panel, multiple first heat dissipation holes are located on the second panel, and multiple second heat dissipation holes are located on one of the cabinet side panels and between the first panel and the second panel; the drawer includes a drawer panel, a drawer back panel, a drawer bottom panel and two drawer side panels, and the drawer side panels have rectangular ventilation holes; the lifting seat can be in a working position, and when the lifting seat is in the working position, the two air outlet ducts are respectively aligned with the two ventilation ducts.

[0016] Furthermore, two shielding plates are installed at one end of the ventilation pipe away from the first panel, and the shielding plates are connected to the ventilation pipe through elastic reset hinge components. When there is no external force, the two shielding plates shield the ventilation pipe.

[0017] Furthermore, when air enters the ventilation duct, the airflow can push the shielding plate open.

[0018] Furthermore, the mounting position has a first groove portion located on the second panel and two connecting channels, a rotating block is installed in the first groove portion, one end of the two connecting channels is connected to the first groove portion, and the other end is connected to the two ventilation pipes respectively; one of the drawer side panels of the drawer has a strip notch, and the rotating block can be in a first position and a second position, when the rotating block is in the first position, the rotating block is embedded in the strip notch, so that when the drawer is pulled out, the end of the strip notch can abut the rotating block so that the drawer cannot be completely pulled out and separated from the cabinet body; when the rotating block is in the second position, the drawer can be completely pulled out from the cabinet body and separated from the cabinet body.

[0019] Furthermore, the first groove portion also has a second groove portion, and a light intensity sensor is installed in the second groove portion; when the two fan units at the lifting seat blow air to the two ventilation pipes respectively, the rotating block can be in the third position, so that the light intensity sensor is blocked by the rotating block.

[0020] When both fan units are turned on, the two connecting channels blow air to the rotating block from both sides of the rotating block, so that the rotating block is in a relatively central position, thereby shielding the light intensity sensor.

[0021] Furthermore, when the rotating block is in the first position or the second position, the rotating block does not block the light intensity sensor.

[0022] Furthermore, the two connecting channels are located in the first groove portion, and the air outlet ends of the two first connecting channels are located on both sides of the rotation axis of the rotating block.

[0023] Furthermore, the first groove portion is in a semicircular shape with a missing corner, and the missing corner is connected to the drawer insertion hole; the rotating block includes a fan-shaped block and two side protrusions installed on both sides of the fan-shaped block.

[0024] Furthermore, the rotating block has an axial hole, a fixed shaft passing through the axial hole is installed at the first groove portion, and an end block is fixed to the end of the fixed shaft.

[0025] Furthermore, the installation position is further provided with an air guide plate fixedly connected to the first panel, and the air guide plate faces the plurality of second heat dissipation holes.

[0026] Furthermore, a handle is installed on the drawer panel.

[0027] This makes it easier to pull out the drawer.

[0028] Furthermore, physical buttons, indicator lights and a touch screen are installed on the drawer panel.

[0029] Furthermore, the air inlet pipe is an L-shaped pipe, and the air outlet pipe is a straight pipe.

[0030] Furthermore, the cabinet body has a cabinet body partition, the cabinet body side electrical connector is installed on the cabinet body partition, and the drawer electrical connector is installed on the drawer back panel; a back panel cabinet door is also installed on the cabinet body back panel.

[0031] Furthermore, the cabinet includes a cabinet top plate and a cabinet bottom plate, the lifting drive mechanism includes a guide rod connected between the cabinet top plate and the cabinet bottom plate, a bearing installed on the cabinet top plate, a motor installed on the cabinet bottom plate, and a screw connecting the motor and the bearing, and the lifting seat has a guide hole that cooperates with the guide rod and a threaded hole that cooperates with the screw rod.

[0032] Thereby, the movement of the lifting seat is realized, and active heat dissipation can be achieved for different drawers through the fan unit.

[0033] Beneficial effects:

[0034] 1. The power distribution cabinet of this application can achieve precise heat dissipation for a certain drawer, ensuring that all electrical components operate at a safe temperature and extending the life of the equipment.

[0035] 2. The power distribution cabinet of the present application can prevent the drawer from being pulled out completely accidentally, but the drawer can be pulled out completely after active operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 This is a schematic diagram of the power distribution cabinet during normal operation;

[0037] Figure 2 This is an enlarged view of area A;

[0038] Figure 3 This is an enlarged view of area B;

[0039] Figure 4 A schematic diagram for accurate heat dissipation of a drawer;

[0040] Figure 5 This is an enlarged view of area C;

[0041] Figure 6 A schematic diagram showing the drawer being pulled out and limited by a rotating block;

[0042] Figure 7 This is an enlarged view of area D;

[0043] Figure 8 Schematic diagram for preparing to use the fan unit to change the position of the rotating block;

[0044] Figure 9 This is an enlarged view of area E;

[0045] Figure 10 This is an enlarged view of area F;

[0046] Figure 11 A schematic diagram of the rotation block switching from a first state to a second state;

[0047] Figure 12 This is an enlarged view of area G;

[0048] Figure 13 This is a first-person perspective diagram of the separation of the drawer and the cabinet;

[0049] Figure 14 This is an enlarged view of the H region;

[0050] Figure 15 This is a second-angle diagram of the separation of the drawer and the cabinet;

[0051] Figure 16 This is an enlarged view of area I;

[0052] Figure 17 This is a schematic diagram of the shielding plate and connecting channel at the cabinet;

[0053] Figure 18 This is an enlarged view of the J region;

[0054] Figure 19 This is a schematic diagram of the layout of the two connecting channels at the cabinet installation location;

[0055] Figure 20 This is an enlarged view of the K region;

[0056] To make it clear, Figure 17 、 19 A portion of the cabinet was cut away.

[0057] Explanation of reference numerals: first panel 1.1; second panel 1.2; cabinet back panel 1.3; back panel cabinet door 1.3.1; cabinet side panel 1.4; first heat dissipation hole 1.5; second heat dissipation hole 1.6; first groove portion 1.7; connecting channel 1.8; cabinet top panel 1.9; drawer panel 2.1; drawer back panel 2.2; drawer side panel 2.3; strip notch 2.3.1; rectangular ventilation hole 2.4; operating handle 2.5; unlocking handle Lock mechanism 2.6; handle 2.7; physical button 2.8; indicator light 2.9; touch screen 2.10; support crossbar 3; roller 3.1; lifting base 4; mounting base 4.1; image acquisition unit 4.2; fan unit 4.3; air inlet duct 4.4; air outlet duct 4.5; ventilation duct 5; shielding plate 5.1; rotating block 6; sector block 6.1; side protrusion block 6.2; end block 6.3; light intensity sensor 7; screw rod 8; air guide plate 9. DETAILED DESCRIPTION

[0058] The following describes embodiments of the present invention in detail, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and are not to be construed as limiting the present invention.

[0059] The present invention provides a drawer-type power distribution cabinet for large-scale power grids, as shown in the figure, comprising a cabinet body and multiple drawers. The cabinet body has a first panel 1.1, a second panel 1.2, a cabinet back panel 1.3, and two cabinet side panels 1.4. The cabinet body has multiple mounting positions, the number of which is equal to the number of drawers and the two correspond one-to-one. The second panel 1.2 has multiple drawer sockets. The first panel 1.1 has multiple support crossbars 3, and the support crossbars 3 have rollers 3.1. The drawers have drawer-side electrical connectors, and the cabinet body has multiple cabinet-side electrical connectors that can be connected to the drawer-side electrical connectors. The drawer-side electrical connectors include a moving contact and a secondary plug; the cabinet-side electrical connectors include a static contact and a secondary socket. The drawer has an operating handle 2.5 and an unlocking mechanism 2.6. The operating handle 2.5 can control the electrical disconnection between the drawer-side electrical connector and the cabinet-side electrical connector, and the unlocking mechanism 2.6 can unlock the drawer and the cabinet body so that the drawer can be pulled out of the cabinet body. The operating handle 2.5 can realize three-position control, and the three positions include a connection position, a test position, and a disconnection position. For the connection position, the moving contact and the static contact are electrically connected, and the secondary plug and the secondary socket are electrically connected; for the test position, the moving contact and the static contact are electrically disconnected, and the secondary plug and the secondary socket are electrically connected; for the disconnection position, the moving contact and the static contact are electrically disconnected, and the secondary plug and the secondary socket are electrically disconnected. A temperature sensor and a humidity sensor are installed in the drawer; a lifting drive mechanism is installed at the cabinet body, and the lifting drive mechanism drives a lifting seat 4, and a mounting seat 4.1 and two fan units 4.3 are installed at the lifting seat 4, and an image acquisition unit 4.2 is installed at the mounting seat 4.1, and the fan unit 4.3 includes an air inlet duct 4.4 and an air outlet duct 4.5; the mounting position has two ventilation ducts 5, a plurality of first heat dissipation holes 1.5, and a plurality of second heat dissipation holes 1.6, and the ventilation duct 5 is installed on the second panel 1.2, multiple first heat dissipation holes 1.5 are located on the second panel 1.2, and multiple second heat dissipation holes 1.6 are located on one of the cabinet side panels 1.4 and located between the first panel 1.1 and the second panel 1.2. The drawer includes a drawer front panel 2.1, a drawer back panel 2.2, a drawer bottom panel, and two drawer side panels 2.3, each of which has rectangular ventilation holes 2.4. The lifting base 4 can be in a working position. When the lifting base 4 is in the working position, the two air outlet pipes 4.5 are respectively aligned with the two ventilation pipes 5. Two shielding plates 5.1 are installed on the end of the ventilation pipe 5 away from the first panel 1.1. The shielding plates 5.1 are connected to the ventilation pipe 5 via an elastic return hinge component. In the absence of external force, the two shielding plates 5.1 block the ventilation pipe 5. When air enters the ventilation pipe 5, the airflow can push the shielding plates 5.1 open.The mounting position comprises a first groove portion 1.7 and two connecting channels 1.8 located on the second panel 1.2. A rotating block 6 is mounted in the first groove portion 1.7. One end of each of the two connecting channels 1.8 is connected to the first groove portion 1.7, and the other ends are connected to the two ventilation pipes 5 respectively. A strip-shaped notch 2.3.1 is formed on one of the drawer side panels. The rotating block 6 can be positioned in a first position and a second position. When the rotating block 6 is in the first position, the rotating block 6 is embedded in the strip-shaped notch 2.3.1, so that when the drawer is pulled out, the strip-shaped notch 2.3.1 is opened. 1 can abut against the rotating block 6 so that the drawer cannot be completely pulled out and separated from the cabinet body; when the rotating block 6 is in the second position, the drawer can be completely pulled out from the cabinet body and separated from the cabinet body; the first groove portion 1.7 also has a second groove portion, and a light intensity sensor 7 is installed at the second groove portion; when the two fan units 4.3 at the lifting seat 4 blow air to the two ventilation pipes 5 respectively, the rotating block 6 can be in the third position, so that the light intensity sensor 7 is blocked by the rotating block 6; when the rotating block 6 is in the first position or the second position, the rotating block 6 does not block the light intensity sensor 7.

[0060] The first groove portion 1.7 is semicircular with a missing corner, and the missing corner is connected to the drawer socket; the rotating block 6 includes a fan-shaped block 6.1 and two side protrusions 6.2 installed on both sides of the fan-shaped block 6.1. The rotating block 6 has an axial hole. A fixed shaft passing through the axial hole is installed in the first groove portion 1.7, and the end of the fixed shaft is fixed to an end block 6.3. The mounting position also has an air guide plate 9 fixedly connected to the first panel 1.1, and the air guide plate 9 faces a plurality of second heat dissipation holes 1.6. The drawer panel 2.1 is equipped with a handle 2.7, a physical button 2.8, an indicator light 2.9 and a touch screen 2.10. The air inlet pipe 4.4 is an L-shaped pipe, and the air outlet pipe 4.5 is a straight pipe. The cabinet body has a cabinet partition, the cabinet-side electrical connector is mounted on the cabinet partition, and the drawer electrical connector is mounted on the drawer back panel; a back panel cabinet door 1.3.1 is also mounted on the cabinet back panel 1.3. The cabinet body includes a cabinet top panel 1.9 and a cabinet bottom panel. The lifting drive mechanism includes a guide rod connected between the cabinet top panel and the cabinet bottom panel, a bearing mounted on the cabinet top panel, a motor mounted on the cabinet bottom panel, and a screw rod 8 connecting the motor and the bearing. The lifting base 4 has a guide hole that cooperates with the guide rod and a threaded hole that cooperates with the screw rod 8.

[0061] Working Principle: The power distribution cabinet of the present application has multiple drawers, each of which can be individually withdrawn for maintenance, making maintenance of the power distribution cabinet more convenient. Temperature sensors are installed in the drawers. When the temperature inside the drawer is high (typically under special operating conditions or when an abnormality occurs; during normal operation, the drawer does not require active cooling from the fan unit), the airflow generated by the fan unit can be blown into the ventilation duct (with both fan units turned on simultaneously), allowing the cooling airflow to enter the drawer and pass through the rectangular ventilation holes in the two drawer side panels. The cooling airflow then exits through the first and second cooling holes, thereby achieving precise cooling of the drawer with abnormally high temperature. At this time, since both fan units are turned on, both connecting channels are venting air. As a result, the rotating block is in the third position under the influence of the airflow from the two connecting channels, thereby blocking the light intensity sensor. Based on whether the light intensity sensor is blocked, it is possible to detect whether the fan unit is accurately cooling the space inside a particular drawer, thus avoiding the situation where an active cooling instruction is issued but active cooling is not actually performed due to, for example, fan unit damage.

[0062] Under normal circumstances, the fan units are in an inactive state. When an operator performs maintenance on a drawer, the operator first turns off the power to disconnect the electrical connection between the drawer's electrical connection components and the cabinet's electrical connection components, and then unlocks the drawer and the cabinet, allowing the operator to pull out the drawer. Furthermore, the drawer can be pulled out for maintenance without having to separate it from the cabinet. During the process of pulling out the drawer, when the drawer is pulled out to a certain position and the rotating block abuts the end of the strip-shaped notch, the drawer is limited and cannot be fully pulled out, thereby preventing the drawer from being accidentally pulled out and falling. At this time, if the operator needs to pull the drawer out completely, one of the fan units can be controlled to turn on, so that under the action of the airflow generated by the fan unit, the rotating block is lifted and switched from the first position to the second position, so that the drawer can now be fully pulled open and separated from the cabinet (an automated program can also be set so that when the drawer is electrically connected to the cabinet again, another fan unit is controlled to automatically start and restore the rotating block from the second position to the first position). At this time, since the switching operation of the rotation block position is initiated by the operator, it can be known that the operator wants to separate the drawer from the cabinet body (when the drawer is fully pulled out at this time, the operator will support the drawer). Therefore, the operator does not want to separate the drawer from the cabinet body, but due to improper operation, the drawer is fully pulled out and the drawer falls to the ground. (In this case, the operator may cause the drawer to fall because he did not support the drawer in time).

[0063] Although the present invention has been illustrated and described with respect to the preferred embodiments, it will be understood by those skilled in the art that various changes and modifications may be made to the present invention without departing from the scope of the present invention as defined by the claims.

Claims

1. A drawer-type power distribution cabinet for large-scale power grid, characterized in that: The cabinet comprises a cabinet body and a plurality of drawers, wherein the cabinet body comprises a first panel, a second panel, a cabinet body back panel, and two cabinet body side panels, wherein the cabinet body has a plurality of mounting positions, the number of the mounting positions being equal to the number of the drawers and the two corresponding one to one, the second panel having a plurality of drawer insertion holes, and the first panel having a plurality of support cross bars; The drawer is provided with a drawer-side electrical connector, and the cabinet is provided with a plurality of cabinet-side electrical connectors that can be connected to the drawer-side electrical connector.

2. The drawer-type power distribution cabinet for large-scale power grid according to claim 1, characterized in that: The drawer-side electrical connector includes a moving contact and a secondary plug; the cabinet-side electrical connector includes a static contact and a secondary socket; the drawer is provided with an operating handle and an unlocking mechanism, the operating handle can control the drawer-side electrical connector and the cabinet-side electrical connector to disconnect the electrical connection, and the unlocking mechanism can unlock the drawer and the cabinet so that the drawer can be pulled out of the cabinet.

3. The drawer-type power distribution cabinet for large-scale power grid according to claim 1, characterized in that: A temperature sensor and a humidity sensor are installed in the drawer; a lifting drive mechanism is installed on the cabinet body, and the lifting drive mechanism drives a lifting seat, a mounting seat and two fan units are installed on the lifting seat, and an image acquisition unit is installed on the mounting seat, and the fan unit includes an air inlet pipe and an air outlet pipe; the mounting position is provided with two ventilation ducts, a plurality of first heat dissipation holes and a plurality of second heat dissipation holes, the ventilation duct is installed on the second panel, the plurality of first heat dissipation holes are located on the second panel, and the plurality of second heat dissipation holes are located on one of the cabinet side panels and between the first panel and the second panel; the drawer includes a drawer panel, a drawer back panel, a drawer bottom panel and two drawer side panels, and the drawer side panels have rectangular ventilation holes; the lifting seat can be in a working position, and when the lifting seat is in the working position, the two air outlet ducts are respectively aligned with the two ventilation ducts.

4. The drawer-type power distribution cabinet for large-scale power grid according to claim 3, characterized in that: The mounting position comprises a first groove portion located on the second panel and two connecting channels, a rotating block being installed in the first groove portion, one end of the two connecting channels being communicated with the first groove portion, and the other end being communicated with the two ventilation pipes respectively; one of the drawer side panels of the drawer comprises a strip-shaped notch, and the rotating block can be in a first position and a second position, and when the rotating block is in the first position, the rotating block is embedded in the strip notch, so that when the drawer is pulled out, the end of the strip notch can abut the rotating block, so that the drawer cannot be completely pulled out and separated from the cabinet body; when the rotating block is in the second position, the drawer can be completely pulled out from the cabinet body and separated from the cabinet body; the first groove portion also comprises a second groove portion, and a light intensity sensor is installed in the second groove portion; when the two fan units at the lifting seat blow air to the two ventilation pipes respectively, the rotating block can be in a third position, so that the light intensity sensor is blocked by the rotating block; When the rotating block is in the first position or the second position, the rotating block does not block the light intensity sensor.

5. The drawer-type power distribution cabinet for large-scale power grid according to claim 4, characterized in that: The first groove portion is semicircular with a missing corner, and the missing corner is connected to the drawer socket; the rotating block includes a fan-shaped block and two side protrusions installed on both sides of the fan-shaped block, the rotating block has an axial hole, and a fixed shaft passing through the axial hole is installed in the first groove portion, and the end of the fixed shaft is fixed with an end block.

6. The drawer-type power distribution cabinet for large-scale power grid according to claim 3, characterized in that: The installation position is further provided with an air guide plate fixedly connected to the first panel, and the air guide plate faces the plurality of second heat dissipation holes.

7. The drawer-type power distribution cabinet for large-scale power grid according to claim 3, characterized in that: A handle is installed on the drawer panel, and physical buttons, indicator lights and a touch screen are installed on the drawer panel.

8. The drawer-type power distribution cabinet for large-scale power grid according to claim 3, characterized in that: The air inlet pipe is an L-shaped pipe, and the air outlet pipe is a straight pipe; each supporting cross bar is provided with a plurality of rollers.

9. The drawer-type power distribution cabinet for large-scale power grid according to claim 3, characterized in that: The cabinet body is provided with a cabinet body partition, the cabinet body side electrical connector is installed on the cabinet body partition, and the drawer electrical connector is installed on the drawer back plate; a back plate cabinet door is also installed on the cabinet body back plate.

10. The drawer-type power distribution cabinet for large-scale power grid according to claim 3, characterized in that: The cabinet body includes a cabinet top plate and a cabinet bottom plate. The lifting drive mechanism includes a guide rod connected between the cabinet top plate and the cabinet bottom plate, a bearing installed on the cabinet top plate, a motor installed on the cabinet bottom plate, and a screw rod connecting the motor and the bearing. The lifting seat has a guide hole that cooperates with the guide rod and a threaded hole that cooperates with the screw rod.

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