Waterproof power distribution cabinet

Abstract

The invention discloses a waterproof power distribution cabinet, and belongs to the technical field of power distribution cabinets, the waterproof power distribution cabinet comprises a power distribution box, the left and right side walls of the box body of the power distribution box are respectively provided with a through hole, the outer bottom of the power distribution box is provided with an equipment rack, the equipment rack comprises a bottom plate and a top plate, and a lifting mechanism is arranged between the bottom plate and the top plate; the lifting mechanism comprises four square pipes, supporting rods are slidably connected into the square pipes in a sleeved mode, the top ends of the supporting rods are fixedly connected with the top plate, a driving mechanism is connected to the supporting rods, a plurality of rain shielding strips are fixedly installed on the left outer side wall and the right outer side wall of a box body of the distribution box respectively, and a water level monitoring mechanism is arranged on the bottom plate. The water level monitoring mechanism controls starting of the driving mechanism. The problem that in the prior art, when a power distribution cabinet used outdoors encounters thunderstorm weather, accumulated water on the periphery of the power distribution cabinet is prone to submerging and entering the power distribution cabinet, and the power distribution cabinet is damaged is solved, operation is easy and convenient, and practicability is high.

Description

Technical Field

[0001] The invention relates to the technical field of power distribution cabinets, in particular to a waterproof power distribution cabinet. Background Art

[0002] Distribution cabinets (boxes), power distribution cabinets (boxes), lighting distribution cabinets (boxes) and metering cabinets (boxes) are the terminal equipment of the power distribution system. Distribution cabinets are a general term for motor control centers. Distribution cabinets are used in situations where the load is relatively dispersed and there are fewer circuits. Motor control centers are used in situations where the load is concentrated and there are more circuits. They distribute the electrical energy of a circuit of the upper-level distribution equipment to the nearest load to provide protection, monitoring and control.

[0003] When current distribution cabinets are used outdoors, they are equipped with many heat dissipation vents. However, there are often thunderstorms outdoors. When the rain is heavy, it is easy for the rain to enter the distribution cabinet through the heat dissipation vents, causing the rain to corrode the electronic components inside the distribution cabinet and damage the distribution cabinet.

[0004] In order to solve the above problems, a waterproof power distribution cabinet with Chinese patent application number CN202311437749.8 includes a power distribution box, a water storage tank is fixedly connected to the top of the power distribution box, a plurality of drainage holes are provided on the inner wall of the water storage tank, and a plurality of first grooves are provided on the inner wall of the water storage tank. The present invention solves the above problems by setting a first baffle. When the outdoor rainfall is too heavy, the rainwater is received by the water storage tank, and the rainwater squeezes the arc-shaped movable plate to move downward. The rack is pushed to slide downward through the moving rod and the connecting rod, so that the gear drives the telescopic rod to rotate, so that the first baffle blocks the heat dissipation port.

[0005] Although the above-mentioned distribution cabinet can prevent rainwater from entering the cabinet body through the heat dissipation port, when encountering a heavy thunderstorm or a long thunderstorm, the water level around the distribution cabinet will rise rapidly, which can easily cause water to accumulate and enter the distribution cabinet, causing damage to the distribution cabinet. Summary of the invention

[0006] The purpose of the present invention is to provide a waterproof distribution cabinet to solve the problem in the prior art that when a distribution cabinet used outdoors encounters thunderstorm weather, the accumulated water around the distribution cabinet is easily submerged and enters the distribution cabinet, causing damage to the distribution cabinet.

[0007] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a waterproof distribution cabinet, comprising a distribution box, wherein the left and right side walls of the box body of the distribution box are respectively provided with through holes, an outer bottom of the distribution box is provided with an equipment rack, the equipment rack comprises a bottom plate and a top plate, the distribution box is fixedly mounted on the top plate by bolts, and a lifting mechanism is arranged between the bottom plate and the top plate; the lifting mechanism comprises a square tube, the square tube is provided with four, and the four square tubes are respectively fixedly mounted at the four corners of the bottom plate, a support rod is slidably sleeved in the square tube, the top end of the support rod is fixedly connected to the top plate, a driving mechanism is connected to the support rod, and the driving mechanism controls the support rod to move in the up and down direction along the square tube; a plurality of rain shield strips are respectively fixedly mounted on the left and right outer side walls of the box body of the distribution box, and the plurality of rain shield strips are respectively arranged close to the through holes, a water level monitoring mechanism is arranged on the bottom plate, and the water level monitoring mechanism controls the start of the driving mechanism.

[0008] The technical principle of this solution is: the distribution box is installed on the top plate. When there is thunderstorm weather and the water level around the distribution box rises, the water level monitoring mechanism will control the driving mechanism to start. The driving mechanism controls the support rod to move upward along the square tube, driving the top plate and the distribution box upward, timely and effectively avoiding water accumulation in the distribution box and causing damage to the distribution box.

[0009] The rain shielding strips arranged on the outer side wall of the distribution box can effectively prevent rainwater from entering the distribution box through the through holes.

[0010] As the preferred technical solution of the present invention: the driving mechanism includes a forward and reverse motor and a fixed seat, the forward and reverse motor is fixedly installed at the center of the bottom plate, a worm is coaxially connected to the output shaft of the forward and reverse motor, two fixed seats are provided, and the two fixed seats are symmetrically arranged along the central axis of the forward and reverse motor, two vertical plates are respectively installed on the two fixed seats, a rotating shaft is installed between the two vertical plates opposite to each other on the two fixed seats, a worm wheel is sleeved on the rotating shaft, the worm wheel and the worm are meshed, connecting rods are fixedly installed on both sides of the rotating shaft on the worm wheel, a strip opening is opened on the side wall of the square tube, and the end of the connecting rod passes through the strip opening and is movably connected to the support rod. The forward and reverse motor is used to drive the worm to rotate, and the worm is meshed with the worm wheel, the worm drives the worm wheel to rotate, and the worm wheel drives the rotating shaft to rotate, and the end of the connecting rod away from the rotating shaft can drive the support rod to move up and down along the square tube, which cleverly realizes the lifting effect of the distribution box.

[0011] As a preferred technical solution of the present invention: a groove is provided at the bottom end of the support rod, a support rod is fixedly installed between the inner walls of the groove, a slide groove is provided on the connecting rod, and the support rod is placed in the slide groove. Through the arrangement of the support rod and the slide groove, the connecting rod can cleverly drive the support rod to move, which is convenient and quick.

[0012] As a preferred technical solution of the present invention: cavities are respectively provided in the left and right side walls of the distribution box, a connecting plate is slidably installed in the cavity, a plurality of rain shields are fixedly connected to the side of the connecting plate, the rain shields are used in conjunction with the through holes, and an adjustment mechanism for controlling the up and down movement of the connecting plates is provided in the box of the distribution box. The through holes can be closed in time by the provided rain shields, effectively preventing rainwater from entering the distribution box, and effectively protecting the safety of the electronic components in the distribution box.

[0013] As a preferred technical solution of the present invention: the adjustment mechanism includes a first magnet, a second magnet, a gear, and a rack. A notch is provided at the position of the inner wall of the distribution box near the connecting plate. A fixing rod is installed on the plate surface of the connecting plate. The fixing rod passes through the notch. The first magnet is installed on the fixing rod. The gear is rotatably arranged at the bottom of the box body of the distribution box. Two racks are provided. The two racks are respectively slidably connected to the bottom of the box body of the distribution box. The two racks are symmetrically arranged along the central axis of the gear and mesh with the gears respectively. The second magnet is fixedly installed at the end of the rack. The magnetic repulsion between the first magnet and the second magnet is provided. A spring is provided between the top of the connecting plate and the top wall of the cavity. The gear is connected with a power mechanism. Through the meshing between the gear and the rack, the gear rotates to drive the rack to move, and the second magnet on the rack moves in the direction of the first magnet. Due to the magnetic repulsion between the first magnet and the second magnet, the second magnet drives the connecting plate to move upward, so that the rain shield on the connecting plate just moves to the through hole, and the through hole is effectively sealed.

[0014] As a preferred technical solution of the present invention: the power mechanism includes a telescopic rod, the telescopic rod is coaxially connected to the worm, and the top of the telescopic rod passes through the top plate, the distribution box and is coaxially connected to the gear. The forward and reverse motors are used to realize the synchronous rotation of the gears, so that when the distribution box is raised and lowered, the connecting plate drives the rain shield to move synchronously, and the through hole is closed and opened, which does not affect the heat dissipation function of the through hole and effectively prevents rainwater from entering the distribution box through the through hole.

[0015] As the preferred technical solution of the present invention: the water level monitoring mechanism includes a switch and a water level cylinder, the switch is fixedly mounted on the bottom of the top plate, the switch controls the forward and reverse motor electrically, the water level cylinder is fixedly mounted on the bottom plate, a water inlet is provided on the side wall of the water level cylinder, a floating plate is provided inside the water level cylinder, a trigger rod is installed on the top of the floating plate, and the trigger rod is directly opposite to the switch. The floating plate is used to measure the change of the water level. When the water level rises, the position of the floating plate rises simultaneously, and the trigger rod on the floating plate can trigger the switch in time to start the forward and reverse motor, which is simple and efficient.

[0016] As a preferred technical solution of the present invention: the forward and reverse motor is a waterproof motor. The waterproof treatment of the forward and reverse motor ensures that it can move normally in rain or water.

[0017] As a preferred technical solution of the present invention: a sealing gasket is installed on the outer surface of the rain shield, and the provided sealing gasket further prevents rainwater from entering the distribution box.

[0018] As a preferred technical solution of the present invention: a shockproof pad is installed at the bottom of the base plate. The shockproof pad is arranged on the base plate to ensure the normal and stable operation of the distribution box.

[0019] By adopting the above technical solution, the beneficial effects of the present invention are: 1. The structural design of the present invention is ingenious. The worm is driven to rotate by the forward and reverse motor, and the rotation of the shaft is realized by the worm meshing with the worm wheel. During the rotation of the shaft, the connecting rod on the shaft can drive the support rod to move up and down along the square tube, thereby realizing the lifting effect of the distribution box and effectively avoiding the danger of the distribution box being submerged by water. 2. The through holes are used for ventilation and cooling in daily life. In thunderstorms, the rain shields around the through holes can block rainwater and prevent it from entering the distribution box and causing damage to the distribution box. At the same time, the rain shield on the connecting plate in the cavity of the side wall of the distribution box can timely block the through holes to prevent rainwater or accumulated water from entering. 3. Use the forward and reverse motor as the power source to synchronously realize the lifting and lowering of the distribution box and the blocking of the through hole, which ensures the normal operation of the distribution box without damage and greatly saves the investment of resources. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the main structure of a waterproof power distribution cabinet of the present invention; Figure 2 It is a structural schematic diagram of the equipment rack in the present invention; Figure 3 It is a structural schematic diagram of the water level monitoring mechanism in the present invention; Figure 4 It is a schematic diagram of the structure of the gear and rack in the present invention; Figure 5 It is the internal schematic diagram of the distribution box in the present invention; Figure 6 It is a schematic diagram of the structure of the inner wall of the distribution box in the present invention; Figure 7 It is a structural schematic diagram of the connecting plate in the present invention.

[0021] In the figure: 1. distribution box; 2. through hole; 3. bottom plate; 4. top plate; 5. square tube; 6. support rod; 7. rain shield; 8. forward and reverse motor; 9. fixing seat; 10. worm; 11. vertical plate; 12. rotating shaft; 13. worm gear; 14. connecting rod; 15. slide groove; 16. connecting plate; 17. rain shield; 18. first magnet; 19. second magnet; 20. gear; 21. rack; 22. spring; 23. switch; 24. water level cylinder; 25. floating plate. DETAILED DESCRIPTION

[0022] The embodiments of the present invention are described in detail below, and examples of the embodiments 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 cannot be understood as limiting the present invention. In the description of the present invention, it should be understood that the orientation or position relationship indicated by the terms "upper", "lower", "front", "upper surface", etc. is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral body; it can be a mechanical connection, an electrical connection, or can communicate with each other; it can be directly connected, or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0023] See also Figure 1-7 The present invention provides an embodiment: a waterproof power distribution cabinet, including a power distribution box 1, the left and right side walls of the power distribution box 1 are respectively provided with through holes 2, and the through holes 2 are used for ventilation and cooling of the power distribution box 1. The outer bottom of the power distribution box 1 is provided with an equipment rack, and the equipment rack includes a bottom plate 3 and a top plate 4. The distribution box is fixedly mounted on the top plate 4 by bolts, and a lifting mechanism is provided between the bottom plate 3 and the top plate 4. The bottom of the bottom plate 3 is installed with a shockproof pad.

[0024] The lifting mechanism includes a square tube 5, and four square tubes 5 are provided. The four square tubes 5 are respectively fixedly installed at the four corners of the bottom plate 3. A support rod 6 is slidably sleeved in the square tube 5. The top end of the support rod 6 is fixedly connected to the top plate 4. A driving mechanism is connected to the support rod 6. The driving mechanism controls the support rod 6 to move up and down along the square tube 5.

[0025] The driving mechanism includes a forward and reverse motor 8 and a fixed seat 9. The forward and reverse motor 8 is a waterproof motor. The forward and reverse motor 8 is fixedly installed at the center of the bottom plate 3. A worm 10 is coaxially connected to the output shaft of the forward and reverse motor 8. Two fixed seats 9 are provided. The two fixed seats 9 are symmetrically arranged along the central axis of the forward and reverse motor 8. Two vertical plates 11 are respectively installed on the two fixed seats 9. A rotating shaft 12 is installed between the two vertical plates 11 located opposite to each other on the two fixed seats 9. A worm gear 13 is sleeved on the rotating shaft 12. The worm gear 13 is meshed with the worm 10. Connecting rods 14 are fixedly installed on both sides of the rotating shaft 12 on the worm gear 13. A strip opening is opened on the side wall of the square tube 5. The end of the connecting rod 14 passes through the strip opening and is movably connected to the support rod 6.

[0026] A groove is provided at the bottom end of the support rod 6, and a support rod is fixedly installed between the inner walls of the groove. A slide groove 15 is provided on the connecting rod 14, and the support rod is placed in the slide groove 15. Through the arrangement of the support rod and the slide groove 15, the connecting rod 14 can cleverly drive the support rod 6 to move, which is convenient and quick.

[0027] A plurality of rain shielding strips 7 are fixedly installed on the left and right outer side walls of the distribution box, respectively. The plurality of rain shielding strips 7 are respectively arranged close to the through holes 2. The rain shielding strips 7 can effectively prevent rainwater from falling from the through holes 2 into the distribution box 1.

[0028] The left and right side walls of the distribution box 1 are provided with cavities, in which connecting plates 16 are slidably installed, and a plurality of rain shields 17 are fixedly connected to the sides of the connecting plates 16, which cooperate with the through holes 2, and sealing gaskets are installed on the outer surfaces of the rain shields 17. An adjusting mechanism for controlling the up and down movement of the connecting plates 16 is provided in the box body of the distribution box 1.

[0029] The adjustment mechanism includes a first magnet 18, a second magnet 19, a gear 20, and a rack 21. A slot is provided on the inner wall of the distribution box 1 near the connecting plate 16. A fixing rod is installed on the plate surface of the connecting plate 16, and the fixing rod passes through the slot. The first magnet 18 is installed on the fixing rod. The gear 20 is rotatably arranged at the bottom of the box body of the distribution box 1. Two racks 21 are provided. The two racks 21 are respectively slidably connected to the bottom of the box body of the distribution box 1. The two racks 21 are respectively symmetrically arranged along the central axis of the gear 20 and mesh with the gear 20 respectively. The second magnet 19 is fixedly installed at the end of the rack 21. The magnetic forces between the first magnet 18 and the second magnet 19 repel each other. A spring 22 is provided between the top of the connecting plate 16 and the top wall of the cavity. The gear 20 is connected to a power mechanism. The power mechanism includes a telescopic rod, which is coaxially connected to the worm 10. The top of the telescopic rod passes through the top plate 4, and the distribution box 1 is coaxially connected to the gear 20.

[0030] Through the meshing between the gear 20 and the rack 21, the gear 20 drives the rack 21 to move when it rotates, and the second magnet 19 on the rack 21 moves in the direction of the first magnet 18. Due to the magnetic repulsion between the first magnet 18 and the second magnet 19, the second magnet 19 drives the connecting plate 16 to move upward, so that the rain shield 17 on the connecting plate 16 just moves to the through hole 2, effectively sealing the through hole 2.

[0031] A water level monitoring mechanism is provided on the bottom plate 3, and the water level monitoring mechanism controls the start of the driving mechanism. The water level monitoring mechanism includes a switch 23 and a water level cylinder 24. The switch 23 is fixedly mounted on the bottom of the top plate 4. The switch 23 electrically controls the forward and reverse motor 8. The water level cylinder 24 is fixedly mounted on the bottom plate 3. A water inlet is provided on the side wall of the water level cylinder 24. A floating plate 25 is provided inside the water level cylinder 24. A trigger rod is installed on the top of the floating plate 25, and the trigger rod is directly opposite to the switch 23.

[0032] The floating plate 25 is used to measure the change of the water level. When the water level rises, the position of the floating plate 25 rises simultaneously, and the trigger rod on the floating plate 25 can trigger the switch 23 in time to start the forward and reverse motor 8 to work, which is simple and efficient.

[0033] Specific implementation method: The distribution box 1 is installed on the top plate 4. When encountering thunderstorm weather, when the water level around the distribution box 1 rises, the water level in the water level cylinder 24 rises synchronously, and the floating plate 25 in the water level cylinder 24 will rise accordingly, until the trigger rod on the floating plate 25 triggers the switch 23, and the switch 23 will control the forward and reverse motor 8 to start, and the forward and reverse motor 8 rotates, driving the worm 10 to rotate, the worm 10 engages the worm gear 13, the worm 10 drives the worm gear 13 to rotate, and the worm gear 13 drives the rotating shaft 12 to rotate, and the end of the connecting rod 14 away from the rotating shaft 12 can drive the support rod 6 to move upward along the square tube 5, and the support rod 6 drives the top plate 4 and the distribution box 1 upward, so as to timely and effectively prevent water from entering the distribution box 1 and causing damage to the distribution box 1.

[0034] The rain shielding strip 7 arranged on the outer wall of the distribution box 1 can effectively prevent rainwater from entering the distribution box 1 from the through hole 2. The forward and reverse motor 8 is used to realize the synchronous rotation of the gear 20, so that when the distribution box 1 is raised or lowered, the connecting plate 16 drives the rain shield 17 to move synchronously, and realizes the closing and opening of the through hole 2, which does not affect the heat dissipation function of the through hole 2 and effectively prevents rainwater from entering the distribution box 1 from the through hole 2.

[0035] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. For those skilled in the art, various changes, modifications, substitutions and variations of these embodiments are made without departing from the principles and spirit of the present invention, and still fall within the scope of protection of the present invention.

Claims

1. A waterproof power distribution cabinet, comprising a power distribution box (1), wherein the left and right side walls of the box body of the power distribution box (1) are respectively provided with through holes (2), characterized in that: The outer bottom of the distribution box (1) is provided with an equipment frame, the equipment frame comprising a bottom plate (3) and a top plate (4), the distribution box is fixedly mounted on the top plate (4) by bolts, and a lifting mechanism is provided between the bottom plate (3) and the top plate (4); The lifting mechanism comprises a square tube (5), wherein four square tubes (5) are provided, and the four square tubes (5) are respectively fixedly mounted at the four corners of the bottom plate (3); a support rod (6) is slidably sleeved inside the square tube (5), and the top end of the support rod (6) is fixedly connected to the top plate (4); a driving mechanism is connected to the support rod (6), and the driving mechanism controls the support rod (6) to move in an up-and-down direction along the square tube (5); A plurality of rain shielding strips (7) are fixedly mounted on the left and right outer side walls of the distribution box, respectively. The plurality of rain shielding strips (7) are respectively arranged close to the through holes (2). A water level monitoring mechanism is arranged on the bottom plate (3), and the water level monitoring mechanism controls the start-up of the driving mechanism.

2. A waterproof power distribution cabinet according to claim 1, characterized in that: The driving mechanism comprises a forward and reverse motor (8) and a fixed seat (9). The forward and reverse motor (8) is fixedly mounted at the center of the bottom plate (3). A worm (10) is coaxially connected to the output shaft of the forward and reverse motor (8). Two fixed seats (9) are provided. The two fixed seats (9) are symmetrically arranged along the central axis of the forward and reverse motor (8). Two vertical plates (11) are respectively installed on the two fixed seats (9). A rotating shaft (12) is installed between two vertical plates (11) located opposite to each other on the two fixed seats (9). A worm wheel (13) is sleeved on the rotating shaft (12). The worm wheel (13) is meshed with the worm wheel (10). Connecting rods (14) are fixedly mounted on the rotating shaft (12) on both sides of the worm wheel (13). A strip opening is opened on the side wall of the square tube (5). The end of the connecting rod (14) passes through the strip opening and is movably connected to the support rod (6).

3. A waterproof power distribution cabinet according to claim 2, characterized in that: A groove is provided at the bottom end of the support rod (6), a support rod is fixedly installed between the inner walls of the groove, a slide groove (15) is provided on the connecting rod (14), and the support rod is placed in the slide groove (15).

4. A waterproof power distribution cabinet according to claim 1, characterized in that: The left and right side walls of the distribution box (1) are respectively provided with cavities, in which connecting plates (16) are slidably mounted, and a plurality of rain shields (17) are fixedly connected to the sides of the connecting plates (16), the rain shields (17) are used in conjunction with the through holes (2), and an adjustment mechanism for controlling the up and down movement of the connecting plates (16) is provided in the box body of the distribution box (1).

5. A waterproof power distribution cabinet according to claim 4, characterized in that: The regulating mechanism comprises a first magnet (18), a second magnet (19), a gear (20), and a rack (21). A slot is provided on the inner wall of the distribution box (1) near the connecting plate (16). A fixing rod is installed on the plate surface of the connecting plate (16). The fixing rod passes through the slot. The first magnet (18) is installed on the fixing rod. The gear (20) is rotatably arranged at the bottom of the box body of the distribution box (1). Two racks (21) are provided. The two racks (21) are respectively slidably connected to the bottom of the box body of the distribution box (1). The two racks (21) are respectively symmetrically arranged along the central axis of the gear (20) and are respectively meshed with the gear (20). The second magnet (19) is fixedly installed at the end of the rack (21). The first magnet (18) and the second magnet (19) are magnetically repelled from each other. A spring (22) is provided between the top of the connecting plate (16) and the top wall of the cavity. The gear (20) is connected to a power mechanism.

6. A waterproof power distribution cabinet according to claim 5, characterized in that: The power mechanism comprises a telescopic rod, which is coaxially connected to the worm (10), and the top of the telescopic rod passes through the top plate (4), the distribution box (1) and is coaxially connected to the gear (20).

7. A waterproof power distribution cabinet according to claim 2, characterized in that: The water level monitoring mechanism comprises a switch (23) and a water level cylinder (24); the switch (23) is fixedly mounted on the bottom of the top plate (4); the switch (23) electrically controls the forward and reverse rotation of the motor (8); the water level cylinder (24) is fixedly mounted on the bottom plate (3); a water inlet is provided on the side wall of the water level cylinder (24); a floating plate (25) is provided inside the water level cylinder (24); a trigger rod is installed on the top of the floating plate (25); the trigger rod is directly opposite to the switch (23).

8. A waterproof power distribution cabinet according to claim 7, characterized in that: The forward and reverse motor (8) is a waterproof motor.

9. A waterproof power distribution cabinet according to claim 4, characterized in that: A sealing gasket is installed on the outer surface of the rain shield (17).

10. The waterproof power distribution cabinet according to claim 1, characterized in that: An anti-vibration pad is installed at the bottom of the base plate (3).

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