A low-voltage JP cabinet with a protective structure

Abstract

The present invention relates to the field of JP cabinet protection, specifically to a low-voltage JP cabinet with a protective structure, comprising a JP cabinet, a ventilation and heat dissipation mechanism, and a movable base. The ventilation and heat dissipation mechanism includes several fans. The JP cabinet is also provided with a drive mechanism, a scissor-type lifting mechanism, and a limit locking mechanism. The drive mechanism comprises a driving gear disc, the scissor-type lifting mechanism comprises two steel ropes, a winding disc, a driven gear disc, a special-shaped pressure rod, and a tension spring. The limit locking mechanism comprises a locking pin and a manual lever. The special-shaped pressure rod rotates a certain angle about its hinge with the JP cabinet to drive the driving and driven gear discs to engage or disengage. The locking pin elastically inserts into the special-shaped pressure rod after the driving and driven gear discs engage, thereby locking the special-shaped pressure rod. The present invention provides a liftable movable base at the bottom of the JP cabinet. When the JP cabinet needs to be moved, the movable base can be lowered and the cabinet can be lifted up, thereby conveniently moving the JP cabinet.

Description

Technical Field

[0001] The present invention relates to the field related to JP cabinet protection, and in particular to a low-voltage JP cabinet with a protection structure. Background Art

[0002] JP cabinet refers to the JP integrated power distribution box. This new type of integrated control box integrates power distribution, metering, protection, control, and reactive power compensation. It is used in substations, factories, industrial and mining enterprises, large power plants, petroleum and chemical enterprises, large steel mills, high-rise building power centers, reactive power compensation, metering, and power distribution.

[0003] Traditional JP cabinets have the following shortcomings: First, most traditional JP cabinets are fixed cabinets, that is, the cabinets are mostly fixed in a certain place by gravity. However, in many cases, the JP cabinets need to be adjusted in position, and the fixed cabinets bring many inconveniences to the movement of the JP cabinets. Secondly, there are two main ways to move such JP cabinets. One is to lift and transfer the JP cabinet, and the other is to hoist and transfer it. Hoisting and transferring are mainly achieved by cranes, which have requirements for usage scenarios. Many JP cabinets are used indoors and cannot be conveniently transferred by cranes. Lifting and transferring are mainly divided into lifting by machine and lifting by manpower, which mainly depends on the weight of the JP cabinet and whether the site of use allows machine transfer. Regardless of the transfer method, it is difficult to avoid vibration or even large shaking of the JP cabinet during transportation, which can easily cause damage to components in the JP cabinet. Summary of the Invention

[0004] Based on this, it is necessary to provide a low-voltage JP cabinet with a protective structure to address the existing technical problems.

[0005] In order to solve the problems of the prior art, the technical solution adopted by the present invention is:

[0006] A low-voltage JP cabinet with a protective structure includes a JP cabinet, wherein the upper and lower ends of the JP cabinet are respectively provided with a ventilation and heat dissipation mechanism and a movable base capable of vertical lifting and lowering. The ventilation and heat dissipation mechanism includes a plurality of fans arranged horizontally on the JP cabinet, and the JP cabinet is also provided with a driving mechanism for driving the plurality of fans to rotate synchronously. The bottom of the JP cabinet is also provided with a scissor-type lifting mechanism for driving the movable base to descend to lift the JP cabinet, and the driving mechanism also has an active gear plate axially connected to the JP cabinet. The scissor-type lifting mechanism has two steel ropes for driving the movable base to descend, a winding drum capable of winding the two steel ropes, and a coaxially fixed mechanism. The driven gear disc on the winding disk and the special-shaped pressure rod hingedly arranged on the JP cabinet, the winding disk is axially connected to one end of the special-shaped pressure rod, and a tension spring is connected between the special-shaped pressure rod and the JP cabinet for keeping the active gear disc and the driven gear disc separated. The JP cabinet is also provided with a limit locking mechanism, the limit locking mechanism has an elastically retractable locking pin that cooperates with the inclined surface of the special-shaped pressure rod and a hand lever for pulling the locking pin out of the special-shaped pressure rod. The special-shaped pressure rod can drive the active gear disc and the driven gear disc to engage or disengage by rotating a certain angle around the hinge with the JP cabinet. The locking pin can be elastically inserted into the special-shaped pressure rod and lock the special-shaped pressure rod after the active gear disc and the driven gear disc are engaged.

[0007] Preferably, the JP cabinet includes a cabinet body and a top cover and a load-bearing bottom frame respectively fixed to the upper and lower ends of the cabinet body, a plurality of fan shafts are arranged on the top of the cabinet body, a plurality of ventilation holes are provided on the cabinet body, two groups of symmetrical guide rail groups are fixed in the load-bearing bottom frame, each group of guide rail groups includes two symmetrically distributed vertical guide rails, two vertical slide grooves are provided on the corresponding side walls of the movable base, respectively used for sliding cooperation with the corresponding two vertical guide rails, a hinge seat for hingedly connecting the special-shaped pressure rod is fixed to the bottom of the cabinet body, the two ends of the tension spring are respectively connected to the cabinet body and the special-shaped pressure rod, and the tension spring is located at the end of the hinge seat away from the driven gear disc.

[0008] Preferably, the driving mechanism also includes a driving motor, a driving vertical shaft axially arranged in the cabinet, and a reduction gear set for amplifying the torque of the driving motor to the driving vertical shaft. The active gear plate is transmission-connected to the bottom end of the driving vertical shaft. A fixing frame for fixing the driving motor is fixedly connected to the top of the cabinet. A rectangular through groove for placing the reduction gear set is also provided on the top of the cabinet. The output shaft of the driving motor is vertically downward and coaxially fixedly connected to the gear at the input end of the reduction gear set. The top of the driving vertical shaft is coaxially fixedly connected to the gear at the output end of the reduction gear set. The driving shafts of several fans are connected to the output shafts of the driving motors through belt transmission.

[0009] Preferably, the scissor-type lifting mechanism further includes two sliding transverse axes and two groups of symmetrically arranged oblique rod groups. The load-bearing bottom frame is further fixedly connected to two symmetrically arranged limiting transverse plates located just above the movable base. Both ends of each sliding transverse axis are slidably arranged on the two limiting transverse plates. The two sliding transverse axes are symmetrically arranged at both ends in the width direction of the limiting transverse plates, and the two sliding transverse axes can approach or move away from each other along the length direction of the limiting transverse plates. The two groups of oblique rod groups are symmetrically distributed on the inner sides of the two limiting transverse plates, and each group of oblique rod groups includes two transmission oblique rods that are cross-arranged and perpendicular to the sliding transverse axes. The middle parts of the two transmission oblique rods are hinged, and the upper ends of the two transmission oblique rods are respectively The top of the cylindrical groove is coaxially fixed with an anti-drop cap for preventing the vertical shaft from falling out. A damper and a first spring for preventing the vertical shaft from rising and falling are also provided in the cylindrical groove. The upper and lower ends of the first spring respectively contact the vertical shaft and the slider. The two ends of the two steel ropes are respectively fixed to the middle part of the two sliding horizontal shafts.

[0010] Preferably, the limit locking mechanism includes a sliding cylinder slidably arranged at the bottom of the cabinet, a rotating disk axially arranged at the bottom of the cabinet, a first connecting rod hinged to the sliding cylinder at one end, and a second connecting rod hinged to the rotating disk and the other end of the first connecting rod at both ends. The sliding cylinder is elastically connected to the bottom of the cabinet and a locking pin is formed at one end of the sliding cylinder close to the special-shaped pressure rod, and one end of the hand lever is fixedly connected to the rotating disk.

[0011] Preferably, a transverse groove is provided at the bottom of the cabinet for the sliding cylinder to slide, and a second spring is provided in the sliding groove for pushing the sliding cylinder toward the special-shaped pressure rod. The two ends of the second spring respectively contact the cabinet and the sliding cylinder, and an arc surface is formed on the top of one end of the locking pin close to the special-shaped pressure rod, and a lock groove is formed at the corresponding end of the special-shaped pressure rod for inserting the locking pin.

[0012] Preferably, the bottom of the driving vertical shaft and the active gear disc are connected via a speed reducer with a self-locking function.

[0013] Preferably, four evenly distributed universal wheels are fixedly connected to the bottom of the mobile base.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] Firstly, the present invention provides a movable base that can be raised and lowered at the bottom of the JP cabinet. When the JP cabinet needs to be moved, the movable base can be lowered and the JP cabinet can be lifted up, thereby conveniently moving the JP cabinet.

[0016] Secondly, the lifting process of the mobile base of the present invention is an automated operation, and only the special-shaped pressure rod needs to be pressed down manually, which is simple and convenient to operate;

[0017] Thirdly, the slider of the present invention is provided with a damper and a first spring for buffering and shock absorption, which can effectively prevent the vibration of the JP cabinet during the transfer process;

[0018] Fourthly, the present invention provides a ventilation and heat dissipation mechanism on the JP cabinet for maintaining ventilation and heat dissipation of the JP cabinet, which can protect the components inside the JP cabinet and prevent the components from being damaged by overheating. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the three-dimensional structure of the embodiment.

[0020] Figure 2 It is a partial three-dimensional structural exploded view of the embodiment.

[0021] Figure 3 yes Figure 2 A magnified view of the local structure at point A.

[0022] Figure 4 yes Figure 2 A magnified view of the local structure at point B in the middle.

[0023] Figure 5 It is a schematic diagram of the three-dimensional structure of the mobile base and the scissor-type lifting mechanism of the embodiment.

[0024] Figure 6 yes Figure 5 A magnified view of the local structure at point C in the middle.

[0025] Figure 7 yes Figure 6 Enlarged view of the local structure at E in the middle.

[0026] Figure 8 yes Figure 5 A magnified view of the local structure at point D in the middle.

[0027] Figure 9 It is a three-dimensional structural exploded view of the slider, the first spring and the connecting vertical shaft of the embodiment.

[0028] Figure 10 It is an enlarged view of the local structure at F in convex 9.

[0029] Figure 11 It is a schematic diagram of the three-dimensional structure of the mobile base and four universal wheels of the embodiment.

[0030] The numbers in the figure are:

[0031] 1. Cabinet; 2. Top cover; 3. Load-bearing bottom frame; 4. Ventilation hole; 5. Mobile base; 6. Fan; 7. Driving gear plate; 8. Steel rope; 9. Winding drum; 10. Driven gear plate; 11. Special-shaped pressure rod; 12. Tension spring; 13. Lock pin; 14. Hand lever; 15. Driving motor; 16. Driving vertical shaft; 17. Reduction gear set; 18. Fixed frame; 19. Rectangular slot; 20. Sliding horizontal shaft; 21 , limiting horizontal plate; 22, transmission diagonal rod; 23, horizontal slide; 24, hinge block; 25, connecting vertical axis; 26, slider; 27, anti-drop cap; 28, damper; 29, first spring; 30, sliding cylinder; 31, rotating disk; 32, first connecting rod; 33, second connecting rod; 34, second spring; 35, arc surface; 36, locking groove; 37, universal wheel; 38, vertical guide rail; 39, hinge seat. DETAILED DESCRIPTION

[0032] In order to further understand the features, technical means, specific objectives and functions achieved by the present invention, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0033] refer to Figures 1 to 11 A low-voltage JP cabinet with a protective structure shown in FIG. 1 includes a JP cabinet, wherein the upper and lower ends of the JP cabinet are respectively provided with a ventilation and heat dissipation mechanism and a movable base 5 capable of vertical lifting and lowering. The ventilation and heat dissipation mechanism includes a plurality of fans 6 arranged horizontally on the JP cabinet, and the JP cabinet is also provided with a driving mechanism for driving the plurality of fans 6 to rotate synchronously. The bottom of the JP cabinet is also provided with a scissor-type lifting mechanism for driving the movable base 5 to descend to lift the JP cabinet, and the driving mechanism also has an active gear plate 7 axially connected to the JP cabinet, and the scissor-type lifting mechanism has two steel ropes 8 for driving the movable base 5 to descend, a winding drum 9 capable of winding the two steel ropes 8, a driven gear plate 10 coaxially fixed to the winding drum 9, and a hinge. A special-shaped pressure rod 11 is connected to the JP cabinet, and the winding reel 9 is axially connected to one end of the special-shaped pressure rod 11, and a tension spring 12 is connected between the special-shaped pressure rod 11 and the JP cabinet for keeping the active gear disc 7 and the driven gear disc 10 separated. A limited locking mechanism is also provided on the JP cabinet, and the limited locking mechanism has an elastically retractable locking pin 13 that cooperates with the inclined surface of the special-shaped pressure rod 11 and a hand lever 14 for pulling the locking pin 13 out of the special-shaped pressure rod 11. The special-shaped pressure rod 11 can drive the active gear disc 7 and the driven gear disc 10 to engage or disengage by rotating a certain angle around the hinge with the JP cabinet. The locking pin 13 can be elastically inserted into the special-shaped pressure rod 11 and lock the special-shaped pressure rod 11 after the active gear disc 7 and the driven gear disc 10 are engaged.

[0034] The JP cabinet includes a cabinet body 1 and a top cover 2 and a load-bearing bottom frame 3 respectively fixed to the upper and lower ends of the cabinet body 1. Several fans 6 are axially connected to the top of the cabinet body 1. Several ventilation holes 4 are provided on the cabinet body 1. Two groups of symmetrical guide rail groups are fixed in the load-bearing bottom frame. Each group of guide rail groups includes two symmetrically distributed vertical guide rails 38. Two vertical slide grooves are provided on the corresponding side walls of the movable base 5, which are respectively used to slide with the corresponding two vertical guide rails 38. A hinge seat 39 for hingedly connecting the special-shaped pressure rod 11 is fixed to the bottom of the cabinet body 1. The two ends of the tension spring 12 are respectively connected to the cabinet body 1 and the special-shaped pressure rod 11, and the tension spring 12 is located at the end of the hinge seat 39 away from the driven gear disc 10.

[0035] When the driving mechanism drives the fans 6 to rotate synchronously, the fans 6 can extract the hot air in the cabinet 1 and form a negative pressure in the cabinet 1, so that the outside air enters the cabinet 1 through the ventilation holes 4. In this way, the hot air in the cabinet 1 is continuously discharged to ensure the normal heat dissipation of the various components in the cabinet 1. The top cover 2 is used to prevent rainwater from reaching the top of the cabinet 1 and then entering the cabinet 1.

[0036] The driving mechanism also includes a driving motor 15, a driving vertical shaft 16 axially arranged in the cabinet 1, and a reduction gear set 17 for amplifying the torque of the driving motor 15 to the driving vertical shaft 16. The active gear plate 7 is transmission-connected to the bottom end of the driving vertical shaft 16. A fixing frame 18 for fixing the driving motor 15 is fixedly connected to the top of the cabinet 1. A rectangular through groove 19 for placing the reduction gear set 17 is also provided on the top of the cabinet 1. The output shaft of the driving motor 15 is vertically downward and coaxially fixedly connected to the gear at the input end of the reduction gear set 17. The top of the driving vertical shaft 16 is coaxially fixedly connected to the gear at the output end of the reduction gear set 17. The driving shafts of several fans 6 are connected to the output shafts of the driving motor 15 by belt drive.

[0037] After the output shaft of the driving motor 15 rotates, it drives several fans 6 to rotate synchronously through belt transmission, thereby sucking the air in the cabinet 1 out of the cabinet 1. At the same time, through the transmission of the reduction gear set 17, the driving vertical shaft 16 can be rotated at a reduced speed, thereby driving the active gear plate 7 to rotate.

[0038] The scissor lift mechanism also includes two sliding transverse shafts 20 and two groups of symmetrically arranged oblique rod groups. Two symmetrically arranged limiting transverse plates 21 are also fixedly connected to the load-bearing bottom frame and are located directly above the mobile base 5. The two ends of each sliding transverse shaft 20 are slidably arranged on the two limiting transverse plates 21. The two sliding transverse shafts 20 are symmetrically arranged at the two ends of the width direction of the limiting transverse plates 21, and the two sliding transverse shafts 20 can approach or move away from each other along the length direction of the limiting transverse plates 21. The two groups of oblique rod groups are symmetrically distributed on the inner sides of the two limiting transverse plates 21, and each group of oblique rod groups includes two cross-arranged transmission oblique rods 22 perpendicular to the sliding transverse shafts 20. The middle parts of the two transmission oblique rods 22 are hinged, and the upper ends of the two transmission oblique rods 22 are respectively connected to the two sliding transverse shafts 20. The corresponding ends are hinged, and four horizontal slide grooves 23 corresponding to the four transmission oblique rods 22 are provided on the top of the movable base 5. The bottom of each transmission oblique rod 22 is hinged with a hinge block 24, and the bottom of the hinge block 24 is fixedly connected with a connecting vertical shaft 25. A slider 26 is slidably provided in each horizontal slide groove 23, and a cylindrical groove for vertical sliding of the connecting vertical shaft 25 is provided on the slider 26. The top of the cylindrical groove is also coaxially fixed with an anti-drop cap 27 for preventing the connecting vertical shaft 25 from falling out. A damper 28 and a first spring 29 for preventing the connecting vertical shaft 25 from rising and falling rapidly are also provided in the cylindrical groove. The upper and lower ends of the first spring 29 respectively resist the connecting vertical shaft 25 and the slider 26. The two ends of the two steel ropes 8 are respectively fixed to the middle part of the two sliding horizontal shafts 20.

[0039] When the driving gear disc 7 and the driven gear disc 10 are engaged, the rotation of the driving vertical shaft 16 can drive the driving gear disc 7 to rotate, and then the winding disc 9 is driven to rotate through the driven gear disc 10, so that the two steel ropes 8 drive the two sliding horizontal shafts 20 to approach each other. Since the middle parts of the two transmission oblique rods 22 in each set of oblique rods are hinged, and the upper ends of the two transmission oblique rods 22 are hinged with the two sliding horizontal shafts 20, through the scissor-type transmission, the lower ends of the two transmission oblique rods 22 can be driven to descend while considering each other, and then the corresponding two sliders 26 are driven to approach each other through the connecting vertical shaft 25 and push the mobile base 5 to descend. When the two sliding horizontal shafts 20 are close enough, they can drive the mobile base 5 to lower the maximum height and lift the entire JP cabinet, so that the operator can easily push the JP cabinet and transfer it. When the JP cabinet encounters an uneven road section during the transfer process, the mobile base 5 will continue to move in the vertical direction. When slight vibration occurs, the combined action of the damper 28 and the first spring 29 can ensure that only the mobile base 5 vibrates slightly when the JP cabinet does not vibrate, and the damper 28 quickly absorbs the vibration force, thereby ensuring the stability of the internal components of the JP cabinet, so that the internal components will not be displaced or even directly damaged due to long-term vibration. When the JP cabinet is transferred to the target position, the lock pin 13 is released from the lock of the anisotropic pressure rod, so that under the action of the tension spring 12, the driven gear disc 10 is separated from the active gear disc 7. Under the action of the JP cabinet's own weight, the JP cabinet automatically descends relative to the mobile base 5, and finally the load-bearing bottom frame falls to the ground to support the JP cabinet. A damper (not shown in the figure) is also provided between the anisotropic pressure rod 11 and the winding drum 9 to slow down the winding drum 9 only when the two steel ropes 8 are released, to ensure that the JP cabinet does not fall too fast and hit the ground when it automatically descends.

[0040] The limit locking mechanism includes a sliding cylinder 30 slidably arranged at the bottom of the cabinet 1, a rotating disk 31 axially arranged at the bottom of the cabinet 1, a first connecting rod 32 hinged at one end of the sliding cylinder 30, and a second connecting rod 33 hinged at both ends to the rotating disk 31 and the other end of the first connecting rod 32 respectively. The sliding cylinder 30 is elastically connected to the bottom of the cabinet 1 and the locking pin 13 is formed at one end of the sliding cylinder 30 close to the special-shaped pressure rod 11, and one end of the hand lever 14 is fixedly connected to the rotating disk 31.

[0041] The sliding cylinder 30 is elastically connected to the cabinet body 1 and elastically extends toward the special-shaped pressure rod 11. By rotating the hand lever 14, the rotating disk 31 can be driven to rotate, and then the first connecting rod 32 is pulled through the second connecting rod 33, and finally the sliding cylinder 30 is pulled away from the special-shaped pressure rod 11, thereby pulling the locking pin 13 out of the special-shaped pressure rod 11.

[0042] A transverse groove is provided at the bottom of the cabinet body 1 for the sliding cylinder 30 to slide. A second spring 34 is provided in the sliding groove for pressing the sliding cylinder 30 against the special-shaped pressure rod 11. The two ends of the second spring 34 respectively contact the cabinet body 1 and the sliding cylinder 30. An arc surface 35 is formed on the top of one end of the locking pin 13 close to the special-shaped pressure rod 11, and a lock groove 36 is formed at the corresponding end of the special-shaped pressure rod 11 for inserting the locking pin 13.

[0043] The sliding cylinder 30 is arranged on one side of the special-shaped pressure rod 11, and the spring is located on the side of the sliding cylinder 30 away from the special-shaped pressure rod 11. The hand lever 14 and the rotating disk 31 are located on the side of the spring away from the sliding cylinder 30. When the special-shaped pressure rod 11 is pressed down and away from one end of the driven gear disc 10, the end of the special-shaped pressure rod 11 close to the gear disc can overcome the tension of the tension spring 12 and tilt up, so that the driven gear disc 10 is meshed with the active gear disc 7. At the same time, the other end of the special-shaped pressure rod 11 will press against the arc surface 35 of the lock pin 13, and press the lock pin 13 to one side of the spring, and then the outer end of the lock pin 13 will retreat to the sliding contact with the special-shaped pressure rod. The rod 11 is formed with a locking groove 36 on one side and continuously approaches the locking groove 36. When the driving gear disc 7 and the driven gear disc 10 are engaged, the locking pin 13 can also elastically extend into the locking groove 36 to complete the locking of the special-shaped pressure rod 11, thereby preventing the driving gear disc 7 and the driven gear disc 10 from being loosened. By rotating the hand lever 14, with the cooperation of the rotating disk 31, the first connecting rod 32 and the second connecting rod 33, the sliding cylinder 30 can be driven to move away from the special-shaped pressure rod 11 again, and then the locking pin 13 is withdrawn, so that the special-shaped pressure rod 11 is reset under the action of the tension spring 12, and the driving gear disc 7 and the driven gear disc 10 are separated.

[0044] The bottom of the driving vertical shaft 16 and the active gear disc 7 are connected through a speed reducer with a self-locking function.

[0045] The reducer is not shown in the figure. The reducer can be a micro worm gear reducer, which is a mature existing technology. Through the self-locking function of the reducer, it can be ensured that after the active gear disc 7 engages the driven gear disc 10 and drives the movable base 5 to descend to lift the JP cabinet, when the active gear disc 7 stops rotating, the movable base 5 can still keep lifting the JP cabinet normally.

[0046] Four evenly distributed universal wheels 37 are fixedly connected to the bottom of the mobile base 5 .

[0047] The universal wheels 37 are used to ensure that the mobile base 5 can move smoothly after lifting the JP cabinet.

[0048] Working principle: The JP cabinet is also provided with a controller (not shown in the figure) and a plurality of control buttons for controlling the operation of the drive motor 15. The controller can control the drive motor 15 to stop working after a specific time (this is a mature existing technology and will not be repeated). When the JP cabinet needs to be lifted up, the drive motor 15 needs to be turned off by the control button first (the control button sends a signal to the controller, and the controller sends a signal to the drive motor 15, thereby turning off the drive motor 15. This is a mature existing technology and will not be repeated). By pressing down the special-shaped pressure rod 11, the driven gear disc 10 can engage the active gear disc 7, and the lock pin 13 automatically pops into the lock groove 36 to fix the special-shaped pressure rod 11. Then, when the safety of the JP cabinet is ensured (such as closing the cabinet door, etc.), the drive motor 15 is turned on by the control button, and the drive motor 15 is controlled to stop working automatically after working for a specific time. After the drive motor 15 rotates, it can drive the vertical shaft 16 and the main The active gear disc 7 and the driven gear disc 10 drive the winding disc 9 to rotate, thereby driving the two steel ropes 8 to reel in and driving the two sliding horizontal shafts 20 to move closer to each other. Through the fork-shaped cooperation of the four transmission inclined rods 22, the four sliders 26 are driven to move closer to each other in pairs, and at the same time drive the mobile base 5 to descend and finally lift the JP cabinet. After the mobile base 5 descends a proper distance, the driving motor 15 stops working and the self-locking effect of the reducer keeps the mobile base 5 lifting the JP cabinet, thereby easily transferring the JP cabinet through the four universal wheels 37. The damper 28 and the first spring 29 can effectively reduce the vibration of the JP cabinet during the transfer process, thereby protecting the internal components. When the JP cabinet needs to be lowered, the hand lever 14 is rotated to drive the lock pin 13 to exit the lock groove 36. Under the action of the tension spring 12, the special-shaped pressure rod 11 is reset and the driven gear disc 10 and the active gear disc 7 are separated. Then, under the action of gravity, the entire JP cabinet continues to descend until the supporting bottom frame 3 falls to the ground.

[0049] The above embodiments merely represent one or several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art would be able to make various modifications and improvements without departing from the spirit of the present invention, and these modifications and improvements fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be determined by the appended claims.

Claims

1. A low-voltage JP cabinet with a protective structure, comprising a JP cabinet, characterized in that: The upper and lower ends of the JP cabinet are respectively provided with a ventilation and heat dissipation mechanism and a movable base (5) capable of vertical lifting and lowering. The ventilation and heat dissipation mechanism includes a plurality of fans (6) arranged in a horizontal state on the JP cabinet. The JP cabinet is also provided with a driving mechanism for driving the plurality of fans (6) to rotate synchronously. The bottom of the JP cabinet is also provided with a scissor-type lifting mechanism for driving the movable base (5) to descend to lift the JP cabinet. The driving mechanism also has an active gear disk (7) axially connected to the JP cabinet. The scissor-type lifting mechanism has two steel ropes (8) for driving the movable base (5) to descend, a winding disk (9) capable of winding the two steel ropes (8), a driven gear disk (10) coaxially fixed to the winding disk (9), and a special-shaped pressure rod (11) hingedly provided on the JP cabinet. The wire drum (9) is axially connected to one end of the special-shaped pressure rod (11), and a tension spring (12) is connected between the special-shaped pressure rod (11) and the JP cabinet for keeping the active toothed disc (7) and the driven toothed disc (10) separated. A limit locking mechanism is also provided on the JP cabinet, wherein the limit locking mechanism has a lock pin (13) that is elastically retractable and cooperates with the inclined surface of the special-shaped pressure rod (11) and a hand lever (14) for pulling the lock pin (13) out of the special-shaped pressure rod (11). The special-shaped pressure rod (11) can rotate around the hinged portion thereof with the JP cabinet and drive the active toothed disc (7) and the driven toothed disc (10) to engage or disengage. The lock pin (13) can be elastically inserted into the special-shaped pressure rod (11) after the active toothed disc (7) and the driven toothed disc (10) are engaged, and lock the special-shaped pressure rod (11). The JP cabinet comprises a cabinet body (1) and a top cover (2) and a bearing bottom frame (3) respectively fixed to the upper and lower ends of the cabinet body (1); a plurality of fans (6) are axially connected to the top of the cabinet body (1); a plurality of ventilation holes (4) are provided on the cabinet body (1); two sets of symmetrical guide rail groups are fixed in the bearing bottom frame; each guide rail group comprises two symmetrically distributed vertical guide rails (38); two vertical slide grooves for slidingly cooperating with the corresponding two vertical guide rails (38) are provided on the corresponding side walls of the movable base (5); a hinge seat (39) for hingedly connecting the special-shaped pressure rod (11) is fixed at the bottom of the cabinet body (1); two ends of a tension spring (12) are respectively connected to the cabinet body (1) and the special-shaped pressure rod (11); and the tension spring (12) is located at one end of the hinge seat (39) away from the driven gear disc (10).

2. The low-voltage JP cabinet with a protective structure according to claim 1, characterized in that: The driving mechanism further comprises a driving motor (15), a driving vertical shaft (16) axially connected to the cabinet (1), and a reduction gear set (17) for amplifying the torque of the driving motor (15) to the driving vertical shaft (16), the driving gear disc (7) is connected to the bottom end of the driving vertical shaft (16) by transmission, the top of the cabinet (1) is fixedly connected to a fixing frame (18) for fixing the driving motor (15), and the top of the cabinet (1) is also provided with a rectangular through slot (19) for placing the reduction gear set (17), the output shaft of the driving motor (15) is vertically downward and is coaxially fixedly connected to the gear at the input end of the reduction gear set (17), the top of the driving vertical shaft (16) is coaxially fixedly connected to the gear at the output end of the reduction gear set (17), and the driving shafts of the plurality of fans (6) are connected to the output shaft of the driving motor (15) by belt transmission.

3. The low-voltage JP cabinet with a protective structure according to claim 1, characterized in that: The scissor lift mechanism further comprises two sliding transverse shafts (20) and two groups of symmetrically arranged oblique rod groups. Two symmetrically arranged limiting transverse plates (21) located directly above the movable base (5) are further fixedly connected to the load-bearing bottom frame. Both ends of each sliding transverse shaft (20) are slidably arranged on the two limiting transverse plates (21). The two sliding transverse shafts (20) are symmetrically arranged at both ends of the limiting transverse plates (21) in the width direction, and the two sliding transverse shafts (20) can move closer to or farther away from each other along the length direction of the limiting transverse plates (21). The two groups of oblique rod groups are symmetrically distributed on the inner sides of the two limiting transverse plates (21), and each group of oblique rod groups comprises two cross-arranged transmission oblique rods (22) perpendicular to the sliding transverse shafts (20). The middle parts of the two transmission oblique rods (22) are hinged to each other, and the upper ends of the two transmission oblique rods (22) are respectively hinged to the corresponding ends of the two sliding transverse shafts (20). Then, the top of the mobile base (5) is provided with four horizontal slide grooves (23) corresponding to the four transmission oblique rods (22), and the bottom of each transmission oblique rod (22) is hinged with a hinge block (24), and the bottom of the hinge block (24) is fixedly connected with a connecting vertical shaft (25). A slider (26) is slidably provided in each horizontal slide groove (23), and a cylindrical groove for vertically sliding the connecting vertical shaft (25) is provided on the slider (26). The top of the cylindrical groove is also coaxially fixed with an anti-drop cap (27) for preventing the connecting vertical shaft (25) from falling out. A damper (28) and a first spring (29) for preventing the connecting vertical shaft (25) from rising and falling quickly are also provided in the cylindrical groove. The upper and lower ends of the first spring (29) respectively resist the connecting vertical shaft (25) and the slider (26). The two ends of the two steel ropes (8) are respectively fixedly connected to the middle of the two sliding horizontal shafts (20).

4. The low-voltage JP cabinet with a protective structure according to claim 1, characterized in that: The limit locking mechanism comprises a sliding cylinder (30) slidably arranged at the bottom of the cabinet (1), a rotating disk (31) axially arranged at the bottom of the cabinet (1), a first connecting rod (32) hinged at one end to the sliding cylinder (30), and a second connecting rod (33) hinged at both ends to the rotating disk (31) and the other end of the first connecting rod (32), the sliding cylinder (30) being elastically connected to the bottom of the cabinet (1) and the locking pin (13) being formed at one end of the sliding cylinder (30) close to the special-shaped pressure rod (11), and one end of the hand lever (14) being fixedly connected to the rotating disk (31).

5. The low-voltage JP cabinet with a protective structure according to claim 4, characterized in that: The cabinet body (1) is provided with a transverse groove for sliding the sliding cylinder (30), and a second spring (34) is provided in the sliding groove for pressing the sliding cylinder (30) against the special-shaped pressure rod (11). The two ends of the second spring (34) respectively contact the cabinet body (1) and the sliding cylinder (30). The top of one end of the lock pin (13) close to the special-shaped pressure rod (11) is formed with an arc surface (35), and the corresponding end of the special-shaped pressure rod (11) is formed with a lock groove (36) for inserting the lock pin (13).

6. The low-voltage JP cabinet with a protective structure according to claim 2, characterized in that: The bottom of the driving vertical shaft (16) and the active gear disc (7) are connected via a speed reducer with a self-locking function.

7. The low-voltage JP cabinet with a protective structure according to claim 1, characterized in that: The bottom of the mobile base (5) is fixedly connected with four evenly distributed universal wheels (37).

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