Power distribution box

Abstract

The invention provides a power distribution box, which relates to the technical field of distribution boxes and comprises a box body and a waterproof cover plate. Heat dissipation net plates are installed at the front end and the rear end of the box body respectively, an inner fixing plate is fixedly installed in the box body, the two ends of the top of a top cavity base are each provided with a set of limiting holes, and a set of bottom plates are further installed at the bottom of the box body in a threaded mode; a rotating rod drives a moving plate to reciprocate up and down, and an air inlet plate and an air outlet plate sequentially move downwards and then reset, so that hot air in the box body is conveniently and quickly discharged by the device, the heat exchange rate of the air in the device is effectively improved, a waterproof cover plate is conveniently and quickly disassembled and assembled, and the mounting efficiency of the device is improved; the problems that when the device operates, components installed in the device dissipate heat to heat internal air, the operation condition of the device and the service life of the internal components are easily affected, the heat dissipation effect of the device needs to be improved, and the installation efficiency of the device is affected due to the fact that the device is inconvenient to install are solved.

Description

Technical Field

[0001] The invention relates to the technical field of distribution boxes, and in particular to a power distribution box. Background Art

[0002] The power distribution box is a low-voltage distribution device that is assembled in a closed or semi-closed metal cabinet or on a screen in accordance with the electrical wiring requirements, including switchgear, measuring instruments, protective electrical appliances and auxiliary equipment. With the continuous growth of power grid construction investment projects and the increasing demand for railway electrification and urban rail transit construction, there is still a large room for the market capacity of low-voltage distribution cabinets. As for the existing power distribution boxes, when the device is in operation, the components installed inside it emit heat, causing the air inside it to heat up, which can easily affect the operation of the device and the service life of its internal components. The heat dissipation effect of the device needs to be improved, and the inconvenience of device installation affects the installation efficiency of the device. Summary of the invention

[0003] The disclosed embodiment relates to an electric power distribution box, which is reciprocated up and down by a movable plate, and the air inlet plate and the air outlet plate are successively moved downward and then reset, so that the device can suck in external air through the telescopic cavity pad and quickly push it into the box, so that the device can quickly discharge the hot air in the box, effectively improving the heat exchange rate of the air in the device, so that the device has a better heat dissipation effect and working environment.

[0004] In a first aspect of the present disclosure, there is provided a power distribution box, specifically comprising: a box body and a waterproof cover plate; The front and rear ends of the box are respectively equipped with heat dissipation mesh plates, an inner fixed plate is fixedly installed inside the box, a group of top cavity seats are fixedly installed on the top of the box, a group of telescopic cavity pads are fixedly connected to the top surface of the top cavity seat, a group of movable plates are slidably installed on the top of the top cavity seat, the top of the telescopic cavity pad is fixedly connected to the bottom surface of the movable plate, a group of rotating rods are rotatably installed on the bottom of the top cavity seat, a group of motors are fixedly installed on the front end of the top cavity seat, the outer end of the rotating rod is fixedly installed on the transmission shaft of the motor, two groups of air outlet plates are slidably installed on the bottom of the top cavity seat, a heat dissipation fan is fixedly installed on the rotating rod, and the heat dissipation fan is placed In the middle of the two groups of air outlet plates, a connecting plate is fixed at the outer end of the rotating rod, and two groups of air inlet plates are slidably installed at the bottom of the movable plate, and the installation method of the air inlet plate and the air outlet plate is the same. A connecting frame is fixedly installed at the rear end of the movable plate by bolts, and the bottom end of the connecting frame is transmission connected to the connecting plate. The waterproof cover plate is snap-fitted and installed on the top of the top cavity seat, and a group of plug rods are slidably installed at both ends of the waterproof cover plate. A group of limiting holes are respectively opened at both ends of the top of the top cavity seat, and the plug rods at both ends of the waterproof cover plate are respectively plugged and installed on the limiting holes at both ends of the top of the top cavity seat, and a group of bottom plates are also threadedly installed on the bottom of the box.

[0005] In at least some embodiments, a group of plug shafts are fixedly installed on the top of the support pole, and a group of bottom grooves are respectively opened at both ends of the waterproof cover plate, and the bottom grooves at both ends of the waterproof cover plate are respectively sleeved and installed on the plug shafts at the top of the support pole.

[0006] In at least some embodiments, a group of outer plates are fixedly installed at both ends of the waterproof cover plate, a group of sliding holes are opened on the outer plates, the outer ends of the insertion rods are fixedly connected to a group of sliding rods, and the sliding rods at the outer ends of the insertion rods are slidably installed on the sliding holes of the outer plates at both ends of the waterproof cover plate.

[0007] In at least some embodiments, a group of movable shafts are fixedly mounted on the outer side of the connecting disk, a group of sliding grooves are transversely opened at the bottom end of the connecting frame, and the movable shafts on the outer side of the connecting disk are slidably mounted on the sliding grooves at the bottom end of the connecting frame.

[0008] In at least some embodiments, a group of side panels are fixedly installed at both ends of the box body, a group of threaded holes are opened on the side panels, a group of adjustment screws are rotatably installed at both ends of the bottom plate, and the adjustment screws at both ends of the bottom plate are threadedly installed on the threaded holes of the side panels at both ends of the box body.

[0009] In at least some embodiments, a group of limiting columns are fixedly connected to the inner end of the sliding rod on the plug rod, a group of second elastic members are sleeved and installed on the sliding rod, and the outer ends of the second elastic members are in contact with the inner end surface of the outer plate on the waterproof cover plate.

[0010] In at least some embodiments, two groups of bottom rods are fixedly installed at both ends of the bottom of the top cavity seat, and a group of fixed ear plates are fixedly connected at both ends of the air outlet plate. A group of sliding holes are opened on the fixed ear plates, and the sliding holes of the fixed ear plates at both ends of the air outlet plate are slidably installed on the bottom rods at the bottom of the top cavity seat.

[0011] In at least some embodiments, a group of mounting grooves are formed at the inner end of the inner fixing plate, and a group of fixing screws are threadedly mounted on the top of the inner fixing plate.

[0012] In at least some embodiments, a group of first elastic members are respectively sleeved and installed on the bottom rods at both ends of the bottom of the top cavity seat, and the top of the first elastic member is in contact with the bottom surface of the air outlet plate.

[0013] In at least some embodiments, a group of support rods are fixedly installed at both ends of the top cavity seat, and a group of connecting plates are fixedly installed at both ends of the movable plate. A group of sliding holes are opened on the connecting plates, and the sliding holes of the connecting plates at both ends of the movable plate are slidably installed on the support rods at both ends of the top cavity seat.

[0014] The present invention provides a power distribution box, which has the following beneficial effects: In the present invention, the movable plate is driven to move up and down reciprocatingly by a rotating rod, and the air inlet plate and the air outlet plate are successively moved downward and then reset, so that the device can suck in external air through the telescopic cavity pad and quickly push it into the box body, cooperate with the heat dissipation fan on the rotating rod to promote the circulation effect of the air inside the box body, and the excess hot air in the box body is discharged through the heat dissipation mesh plate, so that the device can quickly discharge the hot air in the box body, effectively improving the heat exchange rate of the air in the device, so that the device has a better heat dissipation effect and working environment; the plug-in rod is installed on the limiting holes at both ends of the top of the top cavity seat, so that the waterproof cover plate of the device is easy to quickly disassemble and assemble, thereby improving the installation efficiency of the device; and the device can be conveniently adjusted to the use height of the box body by rotating the adjustment screw, thereby improving the waterproof and moisture-proof effect of its bottom end.

[0015] The cam is connected to the top plate of the movable plate through the sliding holes, and the movable shaft outside the connecting plate is slidably installed on the supporting rods at the two ends of the top cavity seat, and the moving shaft at the outer side of the connecting plate is slidably installed on the sliding groove at the bottom end of the connecting frame, and the motor drives the rotating rod to rotate, and cooperates with the telescopic cavity pad on the top surface of the top cavity seat to drive the movable plate to reciprocate up and down. The sliding holes of the fixed ear plates at both ends of the air outlet plate are slidably installed on the bottom rod at the bottom of the top cavity seat, and the installation method of the air inlet plate and the air outlet plate is the same. When the movable plate moves upward, the negative pressure in the telescopic cavity pad is generated, and the air inlet plate moves downward to inlet air into the telescopic cavity pad, and the air outlet plate remains stationary. When the movable plate moves downward, the gas in the telescopic cavity pad pushes the air outlet plate to move downward, and the air inlet plate remains stationary, so as to quickly push the gas in the telescopic cavity pad into the box body, and the heat dissipation fan on the rotating rod promotes the circulation effect of the air inside the box body, and the excess hot air in the box body is discharged through the heat dissipation mesh plate, so that the device is convenient for quickly discharging the hot air in the box body, effectively improving the heat exchange rate of the air in the device, so that the device has a better heat dissipation effect and working environment.

[0016] In addition, the sliding rod at the outer end of the plug rod is slidably installed on the sliding holes of the outer plates at both ends of the waterproof cover plate, and the plug rod is pulled outward to respectively sleeve and install the bottom grooves at both ends of the waterproof cover plate on the plug shaft at the top of the support rod. After the waterproof cover plate is moved to a fixed position, the plug rod is released, and under the action of the second elastic member on the sliding rod, the plug rods at both ends of the waterproof cover plate are respectively plugged and installed on the limiting holes at both ends of the top of the top cavity seat, so that the waterproof cover plate of the device is easy to disassemble and assemble quickly, thereby improving the installation efficiency of the device.

[0017] In addition, the adjusting screws at both ends of the bottom plate are respectively threadedly installed on the threaded holes of the side plates at both ends of the box body, and the adjusting screws are rotated to adjust the distance between the bottom plate and the box body, that is, the device is convenient for adjusting the use height of the box body, and the waterproof and moisture-proof effect of its bottom end is improved. Moreover, the installation groove opened at the inner end of the inner fixing plate and the fixing screws at the top of the inner fixing plate make it easy to install the circuit board inside the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solution of the embodiment of the present invention, the drawings of the embodiment are briefly introduced below.

[0019] The drawings described below are only related to some embodiments of the present invention, but are not intended to limit the present invention.

[0020] In the attached picture: Figure 1 It is a front axial view schematic diagram of the power distribution box of the present invention.

[0021] Figure 2 It is a schematic diagram of a rear axial view of the power distribution box of the present invention.

[0022] Figure 3 It is an internal schematic diagram of the power distribution box of the present invention.

[0023] Figure 4 It is a schematic diagram of the installation of the connecting frame of the power distribution box of the present invention.

[0024] Figure 5 It is a bottom schematic diagram of the top cavity seat of the power distribution box of the present invention.

[0025] Figure 6 It is a schematic diagram of the interior of the top cavity seat of the power distribution box of the present invention.

[0026] Figure 7 It is a schematic diagram of installing a waterproof cover plate of a power distribution box of the present invention.

[0027] Figure 8 The present invention Figure 3 A is a partial enlarged schematic diagram of the middle part.

[0028] Reference numerals list 1. Box body; 101. Side plate; 102. Heat dissipation mesh plate; 103. Internal fixing plate; 1031. Mounting groove; 1032. Fixing screw; 2. Top cavity seat; 201. Telescopic cavity pad; 202. Moving plate; 2021. Connecting plate; 203. Rotating rod; 2031. Heat dissipation fan; 2032. Connecting plate; 2033. Moving shaft; 2034. Motor; 204. Connecting frame; 2041 , sliding groove; 205, air outlet plate; 2051, fixed ear plate; 206, air inlet plate; 207, bottom rod; 2071, first elastic member; 208, support rod; 2081, plug shaft; 2082, limit hole; 3, bottom plate; 301, adjustment screw; 4, waterproof cover plate; 401, bottom groove; 402, outer plate; 403, plug rod; 4031, sliding rod; 4032, second elastic member. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solution and advantages of the embodiment of the present invention clearer, the technical solution of the embodiment of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiment of the present invention. Obviously, the described embodiment is a part of the embodiment of the present invention, not all of the embodiments. Based on the described embodiment of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] Example 1: Please refer to Figures 1 to 8 As shown: The present invention provides a power distribution box, comprising a box body 1 and a waterproof cover plate 4; The front and rear ends of the box body 1 are respectively installed with heat dissipation mesh plates 102, the interior of the box body 1 is fixedly installed with an inner fixed plate 103, a group of top cavity seats 2 are fixedly installed on the top of the box body 1, a group of telescopic cavity pads 201 are fixedly connected to the top surface of the top cavity seat 2, a group of movable plates 202 are slidably installed on the top of the top cavity seat 2, the top of the telescopic cavity pad 201 is fixedly connected to the bottom surface of the movable plate 202, a group of rotating rods 203 are rotatably installed on the bottom of the top cavity seat 2, a group of motors 2034 are fixedly installed on the front end of the top cavity seat 2, the outer end of the rotating rod 203 is fixedly installed on the transmission shaft of the motor 2034, two groups of air outlet plates 205 are slidably installed on the bottom of the top cavity seat 2, a heat dissipation fan 2031 is fixedly installed on the rotating rod 203, and the heat dissipation fan 2031 is placed between the two groups In the middle of the air outlet plate 205, a connecting disk 2032 is fixed to the outer end of the rotating rod 203, and two groups of air inlet plates 206 are slidably installed at the bottom of the movable plate 202, and the installation method of the air inlet plate 206 is the same as that of the air outlet plate 205. The rear end of the movable plate 202 is fixed with a connecting frame 204 by bolts, and the bottom end of the connecting frame 204 is transmission connected to the connecting disk 2032. The waterproof cover plate 4 is snap-fitted and installed on the top of the top cavity seat 2, and a group of plug rods 403 are slidably installed at both ends of the waterproof cover plate 4. A group of limiting holes 2082 are respectively opened at both ends of the top of the top cavity seat 2, and the plug rods 403 at both ends of the waterproof cover plate 4 are respectively plugged and installed on the limiting holes 2082 at both ends of the top of the top cavity seat 2, and a group of bottom plates 3 are also threadedly installed at the bottom of the box body 1.

[0031] Among them, Figures 2 to 6As shown, a group of support rods 208 are fixedly installed at both ends of the top cavity seat 2, a group of connecting plates 2021 are fixedly installed at both ends of the movable plate 202, a group of sliding holes are opened on the connecting plates 2021, and the sliding holes of the connecting plates 2021 at both ends of the movable plate 202 are slidably installed on the support rods 208 at both ends of the top cavity seat 2, a group of moving shafts 2033 are fixedly installed on the outer side of the connecting plate 2032, a group of sliding grooves 2041 are horizontally opened at the bottom end of the connecting frame 204, and the moving shaft 2033 on the outer side of the connecting plate 2032 is slidably installed on the sliding groove 2041 at the bottom end of the connecting frame 204, and the bottom of the top cavity seat 2 Two groups of bottom rods 207 are fixedly installed at both ends of the top cavity seat 2, and two groups of fixed ear plates 2051 are fixedly connected at both ends of the air outlet plate 205. A group of sliding holes are opened on the fixed ear plates 2051 at both ends of the air outlet plate 205, and the sliding holes of the fixed ear plates 2051 at both ends of the air outlet plate 205 are slidably installed on the bottom rods 207 at the bottom of the top cavity seat 2, and a group of first elastic members 2071 are respectively sleeved and installed on the bottom rods 207 at both ends of the bottom of the top cavity seat 2, and the top of the first elastic member 2071 is in contact with the bottom surface of the air outlet plate 205; specifically, the sliding holes of the connecting plates 2021 at both ends of the movable plate 202 are slidably installed on the supporting plates 2021 at both ends of the top cavity seat 2 The movable shaft 2033 on the outer side of the connecting plate 2032 is slidably installed on the sliding groove 2041 at the bottom end of the connecting frame 204, and the motor 2034 drives the rotating rod 203 to rotate, and cooperates with the telescopic cavity pad 201 on the top surface of the top cavity seat 2 to drive the movable plate 202 to move up and down reciprocatingly, and the sliding holes of the fixed ear plates 2051 at both ends of the air outlet plate 205 are respectively slidably installed on the bottom rod 207 at the bottom of the top cavity seat 2, and the air inlet plate 206 is installed in the same way as the air outlet plate 205. When the movable plate 202 moves upward, the negative pressure in the telescopic cavity pad 201 is generated, and the air inlet plate 206 moves downward to adjust the telescopic cavity pad 201. The air is taken in and the air outlet plate 205 remains stationary. When the movable plate 202 moves downward, the gas in the telescopic cavity pad 201 pushes the air outlet plate 205 to move downward, and the air inlet plate 206 remains stationary, so as to quickly push the gas in the telescopic cavity pad 201 into the box body 1. The heat dissipation fan 2031 on the rotating rod 203 promotes the circulation of air inside the box body 1, and the excess hot air in the box body 1 is discharged through the heat dissipation mesh plate 102, so that the device can quickly discharge the hot air in the box body 1, effectively improving the heat exchange rate of the air in the device, so that the device has a better heat dissipation effect and working environment.

[0032] In the embodiments of the present disclosure, Figure 7As shown, a group of plug shafts 2081 are fixedly installed on the top of the support rod 208, a group of bottom grooves 401 are respectively opened at both ends of the waterproof cover plate 4, and the bottom grooves 401 at both ends of the waterproof cover plate 4 are respectively sleeved and installed on the plug shafts 2081 at the top of the support rod 208, a group of outer plates 402 are respectively fixedly installed at both ends of the waterproof cover plate 4, a group of sliding holes are opened on the outer plates 402, the outer ends of the plug rods 403 are fixedly connected with a group of sliding rods 4031, and the sliding rods 4031 at the outer ends of the plug rods 403 are slidably installed on the sliding holes of the outer plates 402 at both ends of the waterproof cover plate 4, the inner ends of the sliding rods 4031 on the plug rods 403 are fixedly connected with a group of limiting columns, and a group of second elastic members 4032 are sleeved and installed on the sliding rods 4031, and The outer end of the second elastic member 4032 contacts the inner end surface of the outer plate 402 on the waterproof cover 4; specifically, the sliding rod 4031 at the outer end of the plug rod 403 is slidably installed on the sliding holes of the outer plates 402 at both ends of the waterproof cover 4, and the plug rod 403 is pulled outward to respectively sleeve and install the bottom grooves 401 at both ends of the waterproof cover 4 on the plug shaft 2081 at the top of the support rod 208. After the waterproof cover 4 is moved to a fixed position, the plug rod 403 is released. Under the action of the second elastic member 4032 on the sliding rod 4031, the plug rods 403 at both ends of the waterproof cover 4 are respectively plugged and installed on the limiting holes 2082 at both ends of the top of the top cavity seat 2, so that the waterproof cover 4 of the device is easy to quickly disassemble and assemble, thereby improving the installation efficiency of the device.

[0033] Embodiment 2: Based on Embodiment 1, wherein Figure 1 and Figure 8 As shown, a group of side panels 101 are fixedly installed at both ends of the box body 1, and a group of threaded holes are opened on the side panels 101, and a group of adjusting screws 301 are rotatably installed at both ends of the bottom plate 3, and the adjusting screws 301 at both ends of the bottom plate 3 are respectively threadedly installed on the threaded holes of the side panels 101 at both ends of the box body 1, and a group of mounting grooves 1031 are opened at the inner end of the inner fixing plate 103, and a group of fixing screws 1032 are also threadedly installed on the top of the inner fixing plate 103; specifically, the adjusting screws 301 at both ends of the bottom plate 3 are respectively threadedly installed on the threaded holes of the side panels 101 at both ends of the box body 1, and the adjusting screws 301 are rotated to adjust the distance between the bottom plate 3 and the box body 1, that is, the device is convenient for adjusting the use height of the box body 1, and the waterproof and moisture-proof effect of the bottom end thereof is improved, and the mounting groove 1031 opened at the inner end of the inner fixing plate 103 and the fixing screw 1032 at the top of the inner fixing plate 103 make it convenient to install the circuit board inside the device.

[0034] Specific usage and function of this embodiment: In the present invention, the plug rod 403 is pulled outward, and the bottom grooves 401 at both ends of the waterproof cover plate 4 are respectively sleeved and installed on the plug shaft 2081 at the top of the support rod 208. After the waterproof cover plate 4 moves to a fixed position, the plug rod 403 is released. Under the action of the second elastic member 4032 on the sliding rod 4031, the plug rods 403 at both ends of the waterproof cover plate 4 are respectively plugged and installed on the limiting holes 2082 at both ends of the top of the top cavity seat 2, so that the waterproof cover plate 4 is easy to disassemble and assemble quickly; the motor 2034 drives the rotating rod 203 to rotate, so as to drive the movable plate 202 to reciprocate up and down. When the movable plate 202 moves upward, the negative pressure in the telescopic cavity pad 201 is generated, and the air inlet plate 206 moves downward to inlet air into the telescopic cavity pad 201, and the air outlet plate 2 05 remains stationary. When the movable plate 202 moves downward, the gas in the telescopic cavity pad 201 pushes the air outlet plate 205 to move downward, and the air inlet plate 206 remains stationary, so as to quickly push the gas in the telescopic cavity pad 201 into the box body 1, so that the device can quickly discharge the hot air in the box body 1, effectively improving the heat exchange rate of the air in the device, so that the device has a better heat dissipation effect and working environment; turn the adjusting screw 301 to adjust the distance between the bottom plate 3 and the box body 1, that is, the device is convenient for adjusting the use height of the box body 1, and improves the waterproof and moisture-proof effect of its bottom end, and through the installation groove 1031 opened at the inner end of the inner fixing plate 103 and the fixing screw 1032 at the top of the inner fixing plate 103, the circuit board inside the device is easy to install.

Claims

1. A power distribution box, comprising a box body (1) and a waterproof cover plate (4); The front and rear ends of the box body (1) are respectively provided with heat dissipation screens (102), characterized in that: An inner fixed plate (103) is fixedly installed inside the box body (1), a group of top cavity seats (2) are fixedly installed on the top of the box body (1), a group of telescopic cavity pads (201) are fixedly connected to the top surface of the top cavity seat (2), a group of movable plates (202) are slidably installed on the top of the top cavity seat (2), the top of the telescopic cavity pad (201) is fixedly connected to the bottom surface of the movable plate (202), a group of rotating rods (203) are rotatably installed on the bottom of the top cavity seat (2), a group of motors (2034) are fixedly installed at the front end of the top cavity seat (2), the outer end of the rotating rod (203) is fixedly installed on the transmission shaft of the motor (2034), two groups of air outlet plates (205) are slidably installed on the bottom of the top cavity seat (2), a heat dissipation fan (2031) is fixedly installed on the rotating rod (203), and the heat dissipation fan (2031) is placed between the two groups of air outlet plates (205), A connecting plate (2032) is fixed to the outer end of the rotating rod (203), two groups of air inlet plates (206) are slidably mounted on the bottom of the movable plate (202), and the air inlet plates (206) are mounted in the same manner as the air outlet plates (205), a connecting frame (204) is fixedly mounted on the rear end of the movable plate (202) by bolts, and the bottom end of the connecting frame (204) is drivingly connected to the connecting plate (2032), a waterproof cover plate (4) is snap-fitted and mounted on the top of the top cavity seat (2), a group of plug rods (403) are slidably mounted on both ends of the waterproof cover plate (4), a group of limiting holes (2082) are respectively opened at both ends of the top of the top cavity seat (2), and the plug rods (403) at both ends of the waterproof cover plate (4) are respectively plugged and mounted on the limiting holes (2082) at both ends of the top of the top cavity seat (2), and a group of bottom plates (3) are also threadedly mounted on the bottom of the box body (1).

2. A power distribution box according to claim 1, characterized in that: A group of support rods (208) are fixedly mounted on both ends of the top cavity seat (2), and a group of connecting plates (2021) are fixedly mounted on both ends of the movable plate (202). A group of sliding holes are opened on the connecting plates (2021), and the sliding holes of the connecting plates (221) at both ends of the movable plate (202) are slidably mounted on the support rods (208) at both ends of the top cavity seat (2).

3. The power distribution box according to claim 1, characterized in that: A group of movable shafts (2033) are fixedly mounted on the outer side of the connection plate (2032), a group of sliding grooves (2041) are transversely opened at the bottom end of the connection frame (204), and the movable shafts (2033) on the outer side of the connection plate (2032) are slidably mounted on the sliding grooves (2041) at the bottom end of the connection frame (204).

4. The power distribution box according to claim 1, characterized in that: Two groups of bottom rods (207) are fixedly mounted at both ends of the bottom of the top cavity seat (2), and a group of fixed ear plates (2051) are fixedly connected at both ends of the air outlet plate (205). A group of sliding holes are opened on the fixed ear plates (2051), and the sliding holes of the fixed ear plates (2051) at both ends of the air outlet plate (205) are slidably mounted on the bottom rods (207) at the bottom of the top cavity seat (2).

5. The power distribution box according to claim 1, characterized in that: A group of first elastic members (2071) are respectively sleeved and installed on the bottom rods (207) at both ends of the bottom of the top cavity seat (2), and the top of the first elastic member (2071) is in contact with the bottom surface of the air outlet plate (205).

6. A power distribution box according to claim 2, characterized in that: A group of plug shafts (2081) are fixedly mounted on the top of the support rod (208), and a group of bottom grooves (401) are respectively opened at both ends of the waterproof cover plate (4), and the bottom grooves (401) at both ends of the waterproof cover plate (4) are respectively sleeved and mounted on the plug shafts (2081) at the top of the support rod (208).

7. The power distribution box according to claim 1, characterized in that: A group of outer plates (402) are fixedly mounted at both ends of the waterproof cover plate (4), a group of sliding holes are opened on the outer plates (402), the outer ends of the insertion rods (403) are fixedly connected to a group of sliding rods (4031), and the sliding rods (4031) at the outer ends of the insertion rods (403) are slidably mounted on the sliding holes of the outer plates (402) at both ends of the waterproof cover plate (4).

8. The power distribution box according to claim 1, characterized in that: A group of limiting columns are fixedly connected to the inner end of the sliding rod (4031) on the insertion rod (403), a group of second elastic members (4032) are sleeved and installed on the sliding rod (4031), and the outer ends of the second elastic members (4032) are in contact with the inner end surface of the outer plate (402) on the waterproof cover plate (4).

9. The power distribution box according to claim 1, characterized in that: A group of side panels (101) are fixedly mounted at both ends of the box body (1), and a group of threaded holes are opened on the side panels (101). A group of adjustment screws (301) are rotatably mounted at both ends of the bottom plate (3), and the adjustment screws (301) at both ends of the bottom plate (3) are respectively threadedly mounted on the threaded holes of the side panels (101) at both ends of the box body (1).

10. The power distribution box according to claim 1, characterized in that: A group of mounting grooves (1031) are formed at the inner end of the inner fixing plate (103), and a group of fixing screws (1032) are threadedly mounted on the top of the inner fixing plate (103).

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