Power distribution cabinet convenient to overhaul

Abstract

A power distribution cabinet convenient to overhaul disclosed by the present invention comprises a cabinet body, a cabinet door, ventilation slots, mounting rails and a screening mechanism, the front part of the cabinet body is through, the front part is provided with the cabinet door, the left and right parts of the cabinet body are respectively provided with a plurality of ventilation slots in a penetrating manner, and the rear end of the inner wall of the cabinet body is provided with a plurality of mounting rails. A screening mechanism used for screening bolts and screws is further installed in the cabinet body, the screening mechanism comprises a plurality of screening groove bodies, a connecting rod mechanism and a telescopic mechanism, and the screening groove bodies correspond to one another up and down. When the telescopic mechanism stretches out and draws back, the four-rod mechanism is controlled through the connecting rod mechanism to swing in a reciprocating mode, all the screening groove bodies can swing left and right, relative movement of bolts or screws relative to the screening groove bodies is achieved, and the screening efficiency is improved; and when each screening groove body swings left and right, the screw head parts with larger diameters of the intercepted bolts or screws are collided firstly, so that the screw rod parts are prevented from being collided firstly.

Description

Technical Field

[0001] The invention relates to a power distribution cabinet, in particular to a power distribution cabinet which is convenient for maintenance. Background Art

[0002] As a common power equipment in the field of power supply and distribution, the power distribution cabinet is usually used in conjunction with a variety of electrical appliances (such as circuit breakers, leakage protectors, switches, etc.), and these electrical appliances are usually installed inside the power distribution cabinet using bolts or screws. Due to the large number and variety of electrical appliances, the number of bolts and screws of different sizes and types is also large. When repairing electrical appliances, these bolts and screws are easily mixed together after disassembly, which easily causes inconvenience in sorting during subsequent installation. For this reason, the bolts and screws are usually classified and stored during disassembly. When the existing distribution cabinet screening structure is used to classify bolts or screws, it usually only uses gravity for screening, which is inefficient. When using the screening structure of partial shaking screening, although it is more efficient than the former, it is easy to cause continuous collision with the threaded part of the bolts and screws during shaking, thereby easily damaging the threaded part and causing the bolts and screws to be scrapped, causing inconvenience to maintenance, highlighting the shortcomings of the existing technology. Summary of the invention

[0003] The purpose of the present invention is to provide a distribution cabinet that is easy to maintain, so as to solve the technical problem that the existing distribution cabinet cannot ensure that the thread damage of the bolts or screws is reduced with high screening efficiency when screening bolts and screws, thereby causing inconvenience in maintenance.

[0004] To achieve the above purpose, the present invention adopts the following technical solutions: A power distribution cabinet that is easy to maintain, includes a cabinet body, a cabinet door, ventilation slots, mounting rails, and a screening mechanism. The front of the cabinet body is penetrated and a cabinet door is installed at the front. The left and right parts of the cabinet body are penetrated by multiple ventilation slots respectively. Multiple mounting rails are installed at the rear end of the inner wall of the cabinet. The cabinet body is also installed with a screening mechanism for screening bolts and screws. The screening mechanism includes a screening trough body, a connecting rod mechanism and a telescopic mechanism. The number of the screening trough bodies is multiple and corresponds to each other up and down. Each of the screening trough bodies is penetrated by a screening slot up and down respectively. The screening slot is horizontally extended, and the upper part is wide and the bottom is narrow. The width of each screening slot decreases from top to bottom in sequence. The screening trough bodies are connected by a connecting rod mechanism to form a vertical multi-parallelogram four-bar mechanism. The telescopic mechanism cooperates with the connecting rod mechanism to control the left and right swing of the four-bar mechanism.

[0005] On the basis of the above technical solution, the distribution cabinet that is easy to maintain also includes a mounting frame, which is installed in the cabinet body. The mounting frame cooperates with the connecting rod mechanism and the telescopic mechanism to support the connecting rod mechanism and the telescopic mechanism. The number of the screening troughs is three, and they are respectively called the upper screening trough, the middle screening trough and the lower screening trough from top to bottom.

[0006] On the basis of the above technical scheme, the telescopic mechanism includes a main support arm, a secondary support arm, and an electric push rod. A horizontal main support arm is fixed to the left part of the mounting frame, a secondary support arm is fixed to the left end of the upper screening trough body, the right part of the main support arm and the right part of the secondary support arm are hinged up and down, and an electric push rod is hinged up and down on the upper part of the mounting frame. The push rod of the electric push rod is hinged up and down to the left part of the secondary support arm. When the electric push rod is telescopic, the upper screening trough body can swing up and down through the main support arm and the secondary support arm.

[0007] On the basis of the above technical scheme, the connecting rod mechanism includes a left slider, a right slider, a left sliding frame, a right sliding frame, a trough frame, and a connecting piece. The upper and lower parts of the mounting frame are each slidably connected to a horizontal left slider and a right slider left and right, the two left sliders are slidably connected to a vertical left sliding frame up and down, and the two right sliders are slidably connected to the right vertical right sliding frame up and down, the left sliding frame and the right sliding frame are respectively hinged to the left and right parts of the upper screening trough body, and the bottom of the middle screening trough body and the bottom of the lower screening trough body are respectively installed with the trough frame, the trough frame penetrates up and down, the left sliding frame and the right sliding frame are respectively inserted with the left and right parts of the two trough frames with a gap, and the two trough frames are connected to the upper screening trough body through a connecting piece so that the upper screening trough body, the middle screening trough body and the lower screening trough body are parallel to each other.

[0008] On the basis of the above technical solution, the upper screening trough body and the left and right parts of the trough body frame are respectively fixed with horizontal hinge shafts in the front and rear directions, the left sliding frame and the right sliding frame are respectively hinged to the left and right parts of the upper screening trough body through the hinge shafts, the left sliding frame and the right sliding frame are respectively gap-connected with the left and right parts of the two trough body frames through the hinge shafts, and the hinge shafts can rotate and slide up and down along the left sliding frame and the right sliding frame.

[0009] On the basis of the above technical scheme, the connecting parts include a shear-type cross, a front connecting plate, a rear connecting plate, a shear-type telescopic frame, a servo motor, and a lifting frame. Each of the hinge shafts is hinged with a front connecting plate and a rear connecting plate, and the front connecting plate, the rear connecting plate and the hinge shaft together form a shear-type cross. There are four groups of shear-type crosses, and every three shear-type crosses corresponding to the upper and lower parts form a group. The front connecting plates and the rear connecting plates in different shear-type crosses in each group of shear-type crosses are hinged end to end to form a shear-type telescopic frame. Every two shear-type telescopic frames corresponding to the front and back parts form a group. The upper parts of the left sliding frame and the right sliding frame are respectively fixed with vertical servo motors, and the upper parts of the left sliding frame and the right sliding frame are respectively connected to the lifting frames for upward and downward sliding movement. The bottoms of the two lifting frames are respectively rotatably connected with the hinge shafts of the left and right parts of the trough frame at the bottom of the middle screening trough body, and the rotating shafts of the two servo motors are respectively threadedly connected with the two lifting frames. When the two servo motors are energized and rotated synchronously forward and reversely, they can drive the two lifting frames to slide up and down along the left sliding frame and the right sliding frame.

[0010] On the basis of the above technical scheme, the middle screening trough is slidably connected to the trough frame at the bottom thereof, and a vertical middle coil spring is fixed to the front and rear parts of the middle screening trough respectively, and the bottom ends of the two middle coil springs are respectively fixed to the front and rear parts of the trough frame at the bottom of the middle screening trough, and the lower screening trough is slidably connected to the bottom thereof, and a vertical lower coil spring is fixed to the front and rear parts of the lower screening trough respectively, and the bottom ends of the two lower coil springs are respectively fixed to the front and rear parts of the trough frame at the bottom of the lower screening trough, and the middle coil spring and the lower coil spring can be elastically compressed and elastically stretched.

[0011] On the basis of the above technical solution, the left part of the mounting frame is slidably connected to a vertical shell, and the upper and lower parts of the shell are each slidably connected to a horizontal wedge block, a horizontal left compression spring is fixed to the left end of the wedge block, and the left end of the left compression spring is fixed to the shell, the upper right part of the wedge block is inclined toward the lower right, and the lower right part of the wedge block is inclined toward the upper right, and the middle part of the shell is rotatably connected to a horizontal adjusting screw, a hand wheel is coaxially fixed to the left end of the adjusting screw, and the adjusting screw is threadedly connected to the mounting frame, and the adjusting screw can drive the shell to move left and right relative to the mounting frame when rotating forwards and backwards.

[0012] Based on the above technical solution, the tank frame at the bottom of the lower screening tank is fastened with a collecting tank by fasteners, and the upper part of the collecting tank is penetrated, and the penetration point of the upper part of the collecting tank corresponds to the penetration point of the bottom of the lower screening tank.

[0013] On the basis of the above technical scheme, a support seat is fixed to the upper and lower parts of the left end of the inner wall of the cabinet body, and a vertical support shaft is fixed to the right part of the two support seats respectively. The two support shafts are coaxial, and a vertical No. 1 pin is fixed to the left part of the top end of the support seat at the lower left part of the cabinet body, and a vertical No. 2 pin is fixed to the rear part of the top end of the support seat at the lower left part of the cabinet body. A limit seat is fixed to the lower left part of the mounting frame, and the mounting frame is gap-connected with the support shaft. When the mounting frame is pushed left and right manually, it can swing left and right with the support shaft as the axis. When the mounting frame is pushed up and down manually, it can move up and down along the support shaft. When the mounting frame is at the bottom of the support shaft, the limit seat can be connected with the No. 1 pin or the No. 2 pin up and down. When the mounting frame is at the upper part of the support shaft, the limit seat can be disconnected from the No. 1 pin or the No. 2 pin up and down.

[0014] Compared with the prior art, the present invention has the following advantages: when the telescopic mechanism of the present invention is telescoped, the connecting rod mechanism controls the four-bar mechanism to swing back and forth, so that each screening trough body can swing left and right, thereby realizing the relative movement of the bolts or screws relative to the screening trough body and improving the screening efficiency. When each screening trough body swings left and right, the screw head part with a larger diameter of the intercepted bolts or screws collides first, avoiding the screw part from colliding first, thereby weakening the collision intensity and frequency of the screw relative to the shaking screening, and effectively reducing the damage to the threaded part. During the collision, the bolts or screws can move relatively, thereby facilitating the discharge of smaller bolts or screws from the screening trough, that is, compared with screening relying solely on gravity, the screening efficiency is improved, making maintenance more convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the axial side structure of the present invention.

[0016] Figure 2 It is a schematic diagram of the axial structure of the upper screening trough body, the middle screening trough body and the lower screening trough body of the present invention when they are tilted upward to the right.

[0017] Figure 3 It is a front view schematic diagram of the upper screening trough body, the middle screening trough body and the lower screening trough body of the present invention when they are horizontal.

[0018] Figure 4 It is a schematic diagram of the axial structure when the upper screening trough body, the middle screening trough body and the lower screening trough body of the present invention are horizontal.

[0019] Figure 5 It is a schematic diagram of the axial structure inside the cabinet of the present invention.

[0020] Figure 6 It is a schematic diagram of the right-side cross-section structure of the lower screening tank body, tank body frame and collecting tank when they are coordinated in the present invention.

[0021] In the figure: 1, cabinet, 2, cabinet door, 301, ventilation slot, 302, mounting rail, 303, screening mechanism, 4, connecting rod mechanism, 5, telescopic mechanism, 6, screening slot, 7, four-bar mechanism, 8, mounting frame, 9, upper screening slot, 10, middle screening slot, 11, lower screening slot, 12, main support arm, 13, auxiliary support arm, 14, electric push rod, 15, left slider, 16, right slider, 17, left sliding frame, 18, right sliding frame, 19, slot frame, 20 , connecting parts, 21, hinged shaft, 22, shear type cross, 23, front connecting plate, 24, rear connecting plate, 25, shear type telescopic frame, 26, servo motor, 27, lifting frame, 28, middle coil spring, 29, lower coil spring, 30, shell, 31, wedge block, 32, left compression spring, 33, adjusting screw, 34, hand wheel, 35, collecting trough, 36, support seat, 37, support shaft, 38, pin No. 1, 39, pin No. 2, 40, limit seat. DETAILED DESCRIPTION

[0022] The present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0023] like Figure 1-Figure 6 As shown, a power distribution cabinet that is easy to maintain includes a cabinet body 1, a cabinet door 2, a ventilation slot 301, a mounting rail 302, and a screening mechanism 303. The front of the cabinet body 1 is penetrated, and the cabinet door 2 is installed at the front. The left and right parts of the cabinet body 1 are penetrated by multiple ventilation slots 301, and multiple mounting rails 302 are installed at the rear end of the inner wall of the cabinet body 1. The cabinet body 1 is also installed with a screening mechanism 303 for screening bolts and screws. The screening mechanism 303 includes a screening trough body, a connecting rod mechanism 4 and a telescopic mechanism 5. The number of the screening trough bodies is multiple, and they correspond to each other from top to bottom. Each of the screening trough bodies is penetrated by a screening slot 6 from top to bottom, respectively. The screening slot 6 is horizontally extended, and the upper part is wide and the bottom is narrow. The width of each screening slot 6 decreases from top to bottom in sequence. The screening trough bodies are connected by a connecting rod mechanism 4 to form a vertical multi-parallelogram four-bar mechanism 7. The telescopic mechanism 5 cooperates with the connecting rod mechanism 4 to control the left and right swing of the four-bar mechanism 7.

[0024] When the telescopic mechanism 5 is telescopic, the connecting rod mechanism 4 controls the four-bar mechanism 7 to swing back and forth, so that each screening slot body can swing left and right. When the screening slot body swings left and right, the bolts or screws are put into the uppermost screening slot 6. As the screening slot body swings left and right, the bolts and screws slide left and right under the action of gravity to produce collisions. The bolts or screws that can completely pass through the screening slot 6 will enter the next screening slot 6 for screening until they are intercepted by the corresponding screening slot 6 or completely discharged from all screening slots 6. The intercepted bolts or screws, under the action of gravity, have their screw head parts facing upward, while the screw parts are facing downward. The screw head part 7 is downward, so when the screening trough body swings left and right, the screw head part with a larger diameter collides first, avoiding the screw part from colliding first, thereby reducing the collision intensity and frequency of the screw relative to the shaking screening, and the bolts or screws can move relatively during the collision, so as to facilitate the discharge of smaller bolts or screws from the screening trough 6, that is, the screening efficiency is improved compared with the screening by gravity alone. After the screening is completed, the four-bar mechanism 7 is controlled to swing right to make the screening trough body tilt to the lower right, so that the bolts or screws can gather to the lower right, and then the bolts or screws can be conveniently taken out of the screening trough 6 as needed.

[0025] The distribution cabinet that is easy to maintain also includes a mounting frame 8, which is installed in the cabinet body 1. The mounting frame 8 cooperates with the connecting rod mechanism 4 and the telescopic mechanism 5 to support the connecting rod mechanism 4 and the telescopic mechanism 5. The number of the screening troughs is three, and from top to bottom they are respectively called the upper screening trough 9, the middle screening trough 10 and the lower screening trough 11.

[0026] The upper screening trough 9 , the middle screening trough 10 and the lower screening trough 11 can be used to perform four-level screening on the screws or bolts, namely the third level intercepted by the upper screening trough 9 , the middle screening trough 10 and the lower screening trough 11 , and the fourth level finally passing through the lower screening trough 11 .

[0027] The telescopic mechanism 5 includes a main support arm 12, a secondary support arm 13, and an electric push rod 14. A horizontal main support arm 12 is fixed to the left portion of the mounting frame 8, and a secondary support arm 13 is fixed to the left end of the upper screening trough body 9. The right portion of the main support arm 12 and the right portion of the secondary support arm 13 are hinged up and down. An electric push rod 14 is hinged up and down on the upper portion of the mounting frame 8. The push rod of the electric push rod 14 is hinged up and down to the left portion of the secondary support arm 13. When the electric push rod 14 is telescopic, the upper screening trough body 9 can be swung up and down through the main support arm 12 and the secondary support arm 13.

[0028] By controlling the electric push rod 14 to extend and retract, the main support arm 12 and the auxiliary support arm 13 can be used to make the upper screening trough 9 swing up and down, so that the four-bar mechanism 7 can be used to make the upper screening trough 9, the middle screening trough 10 and the lower screening trough 11 swing left and right.

[0029] The connecting rod mechanism 4 includes a left slider 15, a right slider 16, a left sliding frame 17, a right sliding frame 18, a trough frame 19, and a connecting piece 20. The upper and lower parts of the mounting frame 8 are respectively connected to the horizontal left slider 15 and the right slider 16 by sliding left and right. The two left sliders 15 are connected to the vertical left sliding frame 17 by sliding up and down together. The two right sliders 16 are connected to the vertical right sliding frame 18 by sliding up and down together. The left sliding frame 17 and the right sliding frame 18 are respectively hinged to the left and right parts of the upper screening trough 9. The bottom of the middle screening trough 10 and the bottom of the lower screening trough 11 are respectively installed with the trough frame 19. The trough frame 19 runs through from top to bottom. The left sliding frame 17 and the right sliding frame 18 are respectively plugged with the left and right parts of the two trough frames 19 with a gap. The two trough frames 19 are connected to the upper screening trough 9 by a connecting piece 20 so that the upper screening trough 9, the middle screening trough 10 and the lower screening trough 11 are parallel to each other.

[0030] The mutual distances among the upper screening trough 9, the middle screening trough 10 and the lower screening trough 11 are limited by the connecting piece 20, and the sliding connection among the left slider 15, the right slider 16, the left sliding frame 17, the right sliding frame 18 and the mounting frame 8 can ensure the smooth movement of the connecting rod mechanism 4, that is, when the upper screening trough 9 swings up and down, the right sliding frame 18 slides up and down along the right slider 16, and the right slider 16 slides left and right along the mounting frame 8.

[0031] The upper screening trough body 9 and the left and right parts of the trough body frame 19 are respectively fixed with a horizontal hinge shaft 21 in the front-to-back direction. The left sliding frame 17 and the right sliding frame 18 are respectively hinged to the left and right parts of the upper screening trough body 9 through the hinge shaft 21. The left sliding frame 17 and the right sliding frame 18 are respectively inserted with a gap between the left and right parts of the two trough body frames 19 through the hinge shaft 21. The hinge shaft 21 can rotate and slide up and down along the left sliding frame 17 and the right sliding frame 18.

[0032] The connecting member 20 includes a shearing cross 22, a front connecting plate 23, a rear connecting plate 24, a shearing telescopic frame 25, a servo motor 26, and a lifting frame 27. Each of the hinge shafts 21 is hinged with a front connecting plate 23 and a rear connecting plate 24, respectively. The front connecting plate 23, the rear connecting plate 24 and the hinge shaft 21 together form a shearing cross 22. There are four groups of shearing crosses 22, and each group of three corresponding shearing crosses 22 is a group. The front connecting plates 23 and the rear connecting plates 24 in different shearing crosses 22 in each group of shearing crosses 22 are hinged end to end to form a shearing telescopic frame 25. Every two front and rear corresponding shear-type telescopic frames 25 form a group, and vertical servo motors 26 are respectively fixed on the upper parts of the left sliding frame 17 and the right sliding frame 18, and lifting frames 27 are respectively connected to the upper parts of the left sliding frame 17 and the right sliding frame 18 for sliding up and down movement. The bottoms of the two lifting frames 27 are respectively rotatably connected to the hinge shafts 21 of the left and right parts of the trough frame 19 at the bottom of the middle screening trough 10, and the rotating shafts of the two servo motors 26 are respectively threadedly connected to the two lifting frames 27. When the two servo motors 26 are powered on and rotated synchronously forward and reversely, they can drive the two lifting frames 27 to slide up and down along the left sliding frame 17 and the right sliding frame 18.

[0033] By controlling the servo motor 26 to rotate forward and reverse, the two lifting frames 27 can slide up and down along the left sliding frame 17 and the right sliding frame 18, so that the shear-type telescopic frame 25 can be extended and retracted, and then the distance between the upper screening trough 9, the middle screening trough 10 and the lower screening trough 11 can be adjusted. When the distance is closer, the lower screening trough 6 can more conveniently receive the screws or bolts from the upper screening trough 6 to reduce loss.

[0034] The middle screening trough 10 is slidably connected to the trough frame 19 at the bottom thereof, and a vertical middle coil spring 28 is fixed to the front and rear parts of each of the middle screening trough 10, and the bottom ends of the two middle coil springs 28 are respectively fixed to the front and rear parts of the trough frame 19 at the bottom of the middle screening trough 10, and the lower screening trough 11 is slidably connected to the trough frame 19 at the bottom thereof, and a vertical lower coil spring 29 is fixed to the front and rear parts of each of the lower screening trough 11, and the bottom ends of the two lower coil springs 29 are respectively fixed to the front and rear parts of the trough frame 19 at the bottom of the lower screening trough 11, and the middle coil spring 28 and the lower coil spring 29 can be elastically compressed and elastically stretched.

[0035] Furthermore, when the distance between the upper screening trough 9, the middle screening trough 10 and the lower screening trough 11 is relatively close, or even when they are in close contact with each other, the compressible middle coil spring 28 and the lower coil spring 29 can maintain the upper and lower contact between the upper screening trough 9, the middle screening trough 10 and the lower screening trough 11 when the four-bar mechanism 7 is in action. At this time, during screening, the dust and debris falling from the screw or bolt can reduce the amount of spillage, and are discharged more concentratedly from the screening trough 6 of the lower screening trough 11, so that the dust and debris are easier to be collected.

[0036] The left part of the mounting frame 8 is slidably connected to a vertical shell 30, and the upper and lower parts of the shell 30 are each slidably connected to a horizontal wedge block 31, and a horizontal left compression spring 32 is fixed to the left end of the wedge block 31, and the left end of the left compression spring 32 is fixed to the shell 30. The upper right part of the wedge block 31 is inclined toward the lower right, and the lower right part of the wedge block 31 is inclined toward the upper right. A horizontal adjusting screw 33 is rotatably connected to the middle part of the shell 30, and a hand wheel 34 is coaxially fixed to the left end of the adjusting screw 33. The adjusting screw 33 is threadedly connected to the mounting frame 8, and the adjusting screw 33 can drive the shell 30 to move left and right relative to the mounting frame 8 when rotating forwards and reversely.

[0037] Furthermore, when the shell 30 extends to the right and the shear-type telescopic frame 25 is extended and retracted, the middle screening trough 10 and the lower screening trough 11 move up and down, thereby squeezing the wedge block 31 on the left, and the wedge block 31 obstructs and intercepts the middle screening trough 10 and the lower screening trough 11 to a certain extent. At this time, the middle coil spring 28, the lower coil spring 29 and the left compression spring 32 are all elastically compressed. When the left compression spring 32 shrinks to a certain extent, the wedge block 31 is not enough to intercept the middle screening trough 10 and the lower screening trough 11. At this time, it is quickly reset under the action of the elastic force of the middle coil spring 28 and the lower coil spring 29, so that the middle screening trough 10 and the lower screening trough 11 can be shaken up and down, thereby improving the screening efficiency of screws or bolts. When it is not needed, the adjusting screw 33 can be rotated to move the housing 30 to the left, thereby preventing the middle screening trough 10 and the lower screening trough 11 from contacting the wedge block 31 when the shearing type telescopic frame 25 is telescoped.

[0038] The tank frame 19 at the bottom of the lower screening tank body 11 is fastened with a collecting tank 35 by fasteners. The upper part of the collecting tank 35 is penetrated, and the penetration point of the upper part of the collecting tank 35 corresponds to the penetration point of the bottom of the lower screening tank body 11 from top to bottom.

[0039] Furthermore, the detachable collecting trough 35 can be used to collect not only the fourth-stage bolts or screws discharged from the screening trough 6 of the lower screening trough body 11, but also the dust and debris discharged therefrom, thereby reducing pollution and facilitating operation.

[0040] A support seat 36 is fixed to the upper and lower parts of the left end of the inner wall of the cabinet 1, and a vertical support shaft 37 is fixed to the right parts of the two support seats 36, and the two support shafts 37 are coaxial. A vertical No. 1 pin 38 is fixed to the left part of the top of the support seat 36 at the lower left part of the cabinet 1, and a vertical No. 2 pin 39 is fixed to the rear part of the top of the support seat 36 at the lower left part of the cabinet 1. A limit seat 40 is fixed to the lower left part of the mounting frame 8, and the mounting frame 8 is gap-connected with the support shaft 37. When the mounting frame 8 is manually pushed left and right, it can swing left and right with the support shaft 37 as the axis. When the mounting frame 8 is manually pushed up and down, it can move up and down along the support shaft 37. When the mounting frame 8 is at the bottom of the support shaft 37, the limit seat 40 can be connected with the No. 1 pin 38 or the No. 2 pin 39 up and down. When the mounting frame 8 is at the upper part of the support shaft 37, the limit seat 40 can be disconnected from the No. 1 pin 38 or the No. 2 pin 39 up and down.

[0041] By lifting the mounting frame 8 and lowering the mounting frame 8, the limit seat 40 can be plugged with the No. 1 pin 38 or the No. 2 pin 39, so that the left and right angles of the mounting frame 8 relative to the cabinet 1 can be changed. When maintenance is performed, the limit seat 40 can be plugged with the No. 2 pin 39. At this time, the right part of the mounting frame 8 faces forward, and the space of the cabinet 1 is more open, which is convenient for maintenance. When the limit seat 40 is plugged with the No. 1 pin 38, the right part of the mounting frame 8 faces right, which is convenient for closing the cabinet door 2.

[0042] The above is a preferred embodiment of the present invention. For ordinary technicians in this field, according to the teachings of the present invention, without departing from the principles and spirit of the present invention, changes, modifications, substitutions and variations made to the implementation methods are still within the scope of protection of the present invention.

Claims

1. A power distribution cabinet that is easy to maintain, comprising a cabinet body (1), a cabinet door (2), a ventilation slot (301), a mounting rail (302), and a screening mechanism (303), wherein the cabinet body (1) is penetrated at the front and the cabinet door (2) is installed at the front, a plurality of ventilation slots (301) are penetrated at the left and right parts of the cabinet body (1), a plurality of mounting rails (302) are installed at the rear end of the inner wall of the cabinet body (1), and a screening mechanism (303) for screening bolts and screws is also installed in the cabinet body (1), characterized in that: The screening mechanism (303) comprises a screening trough body, a connecting rod mechanism (4) and a telescopic mechanism (5). The screening trough bodies are multiple in number and correspond to each other from top to bottom. Each screening trough body is penetrated by a screening trough (6) from top to bottom. The screening trough (6) is horizontally extended and is wide at the top and narrow at the bottom. The width of each screening trough (6) decreases from top to bottom. The screening trough bodies are connected by the connecting rod mechanism (4) to form a vertical multi-parallelogram four-bar mechanism (7). The telescopic mechanism (5) cooperates with the connecting rod mechanism (4) to control the left and right swing of the four-bar mechanism (7).

2. The power distribution cabinet that is easy to maintain according to claim 1 is characterized in that: The power distribution cabinet that is easy to maintain also includes a mounting frame (8), the mounting frame (8) being mounted in the cabinet body (1), the mounting frame (8) cooperating with the connecting rod mechanism (4) and the telescopic mechanism (5) for supporting the connecting rod mechanism (4) and the telescopic mechanism (5), and the number of the screening trough bodies is three, and they are respectively called an upper screening trough body (9), a middle screening trough body (10) and a lower screening trough body (11) from top to bottom.

3. The power distribution cabinet that is easy to maintain according to claim 2 is characterized in that: The telescopic mechanism (5) comprises a main support arm (12), a secondary support arm (13), and an electric push rod (14); a horizontal main support arm (12) is fixed to the left portion of the mounting frame (8); a secondary support arm (13) is fixed to the left end of the upper screening trough (9); the right portion of the main support arm (12) and the right portion of the secondary support arm (13) are hinged vertically; an electric push rod (14) is hinged vertically on the upper portion of the mounting frame (8); a push rod of the electric push rod (14) and the left portion of the secondary support arm (13) are hinged vertically; when the electric push rod (14) is telescopic, the upper screening trough (9) can be swung up and down through the main support arm (12) and the secondary support arm (13).

4. The power distribution cabinet that is easy to maintain according to claim 2 is characterized in that: The connecting rod mechanism (4) comprises a left slider (15), a right slider (16), a left sliding frame (17), a right sliding frame (18), a trough frame (19), and a connecting member (20). The upper and lower parts of the mounting frame (8) are respectively connected to a horizontal left slider (15) and a right slider (16) in a left-right sliding manner. The two left sliders (15) are connected to a vertical left sliding frame (17) in a vertical sliding manner. The two right sliders (16) are connected to a vertical right sliding frame (18) in a right-right sliding manner. The left sliding frame (17) and the right sliding frame (18) are connected to each other in a left-right sliding manner. 8) are respectively hinged to the left and right parts of the upper screening tank body (9), and tank frames (19) are respectively installed at the bottom of the middle screening tank body (10) and the bottom of the lower screening tank body (11), and the tank frames (19) penetrate from top to bottom. The left sliding frame (17) and the right sliding frame (18) are respectively plugged with the left and right parts of the two tank frames (19) with a gap, and the two tank frames (19) are connected to the upper screening tank body (9) through a connecting piece (20) so that the upper screening tank body (9), the middle screening tank body (10) and the lower screening tank body (11) are parallel to each other.

5. The power distribution cabinet that is easy to maintain according to claim 4 is characterized in that: A horizontal hinge shaft (21) is fixed to the left and right parts of the upper screening tank body (9) and the tank body frame (19) in the front-to-back direction; the left sliding frame (17) and the right sliding frame (18) are respectively hingedly connected to the left and right parts of the upper screening tank body (9) via the hinge shafts (21); the left sliding frame (17) and the right sliding frame (18) are respectively connected to the left and right parts of the two tank body frames (19) via the hinge shafts (21); and the hinge shafts (21) can rotate and slide up and down along the left sliding frame (17) and the right sliding frame (18).

6. The power distribution cabinet that is easy to maintain according to claim 5 is characterized in that: The connecting member (20) comprises a shearing cross (22), a front connecting plate (23), a rear connecting plate (24), a shearing telescopic frame (25), a servo motor (26), and a lifting frame (27). Each of the hinge shafts (21) is hingedly connected to a front connecting plate (23) and a rear connecting plate (24). The front connecting plate (23), the rear connecting plate (24), and the hinge shaft (21) together form a shearing cross (22). There are four groups of shearing crosses (22), and each group includes three corresponding shearing crosses (22) in a row. The front connecting plates (23) and the rear connecting plates (24) in different shearing crosses (22) in each group of shearing crosses (22) are hingedly connected end to end to form a shearing telescopic frame ( 25), each two front-to-back corresponding shear-type telescopic frames (25) form a group, the upper parts of the left sliding frame (17) and the right sliding frame (18) are respectively fixed with vertical servo motors (26), the upper parts of the left sliding frame (17) and the right sliding frame (18) are respectively connected with lifting frames (27) for sliding up and down movement, the bottoms of the two lifting frames (27) are respectively rotatably connected with the hinge shafts (21) of the left and right parts of the tank frame (19) at the bottom of the middle screening tank (10), the rotating shafts of the two servo motors (26) are respectively threadedly connected with the two lifting frames (27), and when the two servo motors (26) are powered on and rotated forward and backward synchronously, they can drive the two lifting frames (27) to slide up and down along the left sliding frame (17) and the right sliding frame (18).

7. The power distribution cabinet that is easy to maintain according to claim 6 is characterized in that: The middle screening trough (10) is slidably connected to a trough frame (19) at the bottom thereof, and a vertical middle coil spring (28) is fixed to each of the front and rear portions of the middle screening trough (10), and the bottom ends of the two middle coil springs (28) are respectively fixed to the front and rear portions of the trough frame (19) at the bottom of the middle screening trough (10). The lower screening trough (11) is slidably connected to the trough frame (19) at the bottom thereof, and a vertical lower coil spring (29) is fixed to each of the front and rear portions of the lower screening trough (11), and the bottom ends of the two lower coil springs (29) are respectively fixed to the front and rear portions of the trough frame (19) at the bottom of the lower screening trough (11), and the middle coil spring (28) and the lower coil spring (29) can be elastically compressed and elastically stretched.

8. The power distribution cabinet that is easy to maintain according to claim 7 is characterized in that: The left portion of the mounting frame (8) is slidably connected to a vertical housing (30), and the upper and lower portions of the housing (30) are each slidably connected to a horizontal wedge block (31), a horizontal left compression spring (32) is fixed to the left end of the wedge block (31), and the left end of the left compression spring (32) is fixed to the housing (30), the upper right portion of the wedge block (31) is inclined toward the lower right, and the lower right portion of the wedge block (31) is inclined toward the upper right, and the middle portion of the housing (30) is rotatably connected to a horizontal adjusting screw (33), a hand wheel (34) is coaxially fixed to the left end of the adjusting screw (33), and the adjusting screw (33) is threadedly connected to the mounting frame (8), and the adjusting screw (33) can drive the housing (30) to move left and right relative to the mounting frame (8) when rotating forwards and reversely.

9. A power distribution cabinet that is easy to maintain according to any one of claims 4 to 7, characterized in that: The tank frame (19) at the bottom of the lower screening tank body (11) is fastened with a collecting tank (35) via a fastener, and the upper portion of the collecting tank (35) penetrates, and the upper portion of the collecting tank (35) and the bottom portion of the lower screening tank body (11) are vertically corresponding.

10. A power distribution cabinet that is easy to maintain according to any one of claims 2 to 7, characterized in that: A support seat (36) is fixed to the upper and lower parts of the left end of the inner wall of the cabinet (1), and a vertical support shaft (37) is fixed to the right part of each of the two support seats (36). The two support shafts (37) are coaxial. A vertical No. 1 pin (38) is fixed to the left part of the top of the support seat (36) at the lower left of the cabinet (1), and a vertical No. 2 pin (39) is fixed to the rear part of the top of the support seat (36) at the lower left of the cabinet (1). A limit seat (40) is fixed to the lower left of the mounting frame (8), and the mounting frame (8) and the support shaft (37) are spaced apart. When the mounting frame (8) is manually pushed left and right, it can swing left and right with the support shaft (37) as the axis; when the mounting frame (8) is manually pushed up and down, it can move up and down along the support shaft (37); when the mounting frame (8) is at the bottom of the support shaft (37), the limit seat (40) can be plugged in with the first pin (38) or the second pin (39) up and down; when the mounting frame (8) is at the top of the support shaft (37), the limit seat (40) can be disconnected from the first pin (38) or the second pin (39) up and down.

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