Intelligent Power Supply System for Rail Transit

Abstract

The present invention discloses an intelligent power supply system for rail transit, which includes a power supply rack and a pantograph, and further includes a pantograph support device for elastically supporting the pantograph. The pantograph support device is installed on the top of the train of rail transit. The pantograph support device includes a support spring and two relatively arranged and juxtaposed support mechanisms; it has a small volume and reduced weight, so as to facilitate modular disassembly and assembly, and has a relatively high degree of automation during use.

Description

Technical Field

[0001] The present invention relates to the technical field of rail transit power supply, and in particular to an intelligent power supply system for rail transit. Background Art

[0002] Urban rail transit (subway) is generally charged when the train arrives at the station. During charging, the pantograph is unfolded and lifted, so that the pantograph contacts the electric contact network and obtains electrical energy. However, in the prior art, the pantograph can be divided into two types: single-arm pantograph and double-arm pantograph. Its structure is composed of a slide plate, an upper frame, a lower arm rod (a lower frame for a double-arm pantograph), a base frame, a pantograph lifting spring, a transmission cylinder, a supporting insulator and other components, as well as an improved diamond-shaped lifting arm. However, the lifting mechanism for lifting the pantograph is large in size and quite bulky, which makes the manufacturing cost high. When it is damaged and replaced, the parts need to be disassembled and removed. Modular replacement is difficult, making disassembly and assembly quite inconvenient, and the degree of automation is relatively low. Summary of the invention

[0003] The purpose of the present invention is to provide an intelligent power supply system for rail transit.

[0004] To achieve the above-mentioned purpose, the rail transit intelligent power supply system of the present invention includes a power supply frame and a pantograph, and also includes a pantograph support device for elastically supporting the pantograph, the pantograph support device is installed on the top of the rail transit train, the pantograph support device includes a support spring, and two supporting mechanisms arranged oppositely and in parallel; the two supporting mechanisms each include a fixed plate, a first guide member, a second guide member, two window chains, and two symmetrically arranged sprockets; the fixed plate is installed on the top of the rail transit train, the first guide member and the second guide member are fixed to the mounting surface of the fixed plate, the first guide member includes two symmetrically arranged guide concave parts, each guide concave part includes an arc-shaped concave surface, the two ends of the arc-shaped concave surface are respectively extended to form a vertical plane and an inclined plane, the arc-shaped concave surface, the vertical plane and the inclined plane are spliced ​​to form a chain guide surface, and each sprocket is respectively located at the two arc-shaped concave surfaces. On the side of the surface, two sprockets are rotatably installed on the fixed plate through a rotating shaft, the center of the arc concave surface is coincident with the center of the sprocket, each window opening chain is respectively placed between the arc concave surface and the sprocket at two locations, and the meshing surface of the window opening chain is meshed with the sprocket, and the back of the window opening chain is in contact with the chain guide surface; the second guide member is located above the vertical plane, and the second guide member is provided with a guide channel for the two window opening chains to pass through, the head ends of the two window opening chains of each supporting mechanism are fixed to the pantograph, and a driving mechanism for driving the two sprockets to rotate relative to each other is provided on the back of the fixed plate, and the driving mechanism is respectively connected to the rotating shafts on the two sprockets through two clutches, and a support plate is fixed between the fixed plates of the two supporting mechanisms, and the two ends of the support spring are respectively connected to the pantograph and the support plate; the controller includes a data acquisition module for obtaining data on the upcoming entry of trains from the rail transit control center;

[0005] When the clutch is in the disengaged state, the drive mechanism is separated from the rotating shaft on the sprocket, so that the window-opening chain is in the extended state under the action of the support spring, and the pantograph is urged to rise to contact with the power supply frame;

[0006] When the clutch is in the engaged state, the drive mechanism is connected to the rotating shaft on the sprocket, so that the drive mechanism drives the two sprockets to rotate relative to each other to urge the window-opening chain to retract, and the pantograph is urged to be in the retracted state to separate from the power supply frame.

[0007] According to the rail transit intelligent power supply system described above, the drive mechanism includes a motor, a driving gear, two driven gears, and a mounting plate disposed away from the back surface of the fixing plate. The driving gear and the two driven gears are respectively rotatably mounted on the mounting plate through rotating shafts. The rotating shaft of the motor is connected to the center of the driving gear. The driving gear meshes with one of the driven gears for transmission, and the two driven gears mesh with each other for transmission. The rotating shaft of the motor is fixed to the central part of the driving gear. The clutch includes two movable sleeves and two clutch driving mechanisms. Each movable sleeve is respectively sleeved on the end portion of the rotating shaft on the two driven gears. The outer wall of the end portion of these two rotating shafts is formed with a plurality of externally toothed portions arranged in an annular array. External tooth grooves are formed between the external toothed portions. The inner walls of the two movable sleeves are both formed with a plurality of internally toothed portions arranged in an annular array. Internal tooth grooves are formed between the internally toothed portions. And the externally toothed portions are fitted in the internal tooth grooves, and the internally toothed portions are fitted in the external tooth grooves. Each clutch driving mechanism is respectively connected to the two movable sleeves. The outer wall of the end portion of the rotating shaft on the two sprockets is formed with a plurality of engaging teeth arranged in an annular array. Engaging grooves are formed between the engaging teeth. When engaging, the engaging teeth are fitted in the internal tooth grooves, and the internally toothed portions are fitted in the engaging grooves.

[0008] According to the rail transit intelligent power supply system described above, both of the two clutch driving mechanisms include a connecting plate fixed to the bottom of the back surface of the fixing plate. A horizontal translation driving device is disposed on the connecting plate. A driving rod is mounted on the driving portion of the translation driving device. The driving rod is connected to the movable sleeve.

[0009] According to the rail transit intelligent power supply system described above, a first microswitch is mounted on each second guiding member. Limit rods are provided at the head end and the tail end of each window-opening chain. A second microswitch and a stop rod are mounted on the side opposite to the tail end of the inclined plane through a mounting block. The stop rod is close to the tail end of the inclined plane. The contact piece of the second microswitch is located in front of the baffle.

[0010] According to the rail transit intelligent power supply system described above, a receiving box is connected to the tail end of each inclined plane with a guiding concave. A chain inlet is provided on the receiving box. The second microswitch and the stop rod are both located between the inlet and the tail end of the inclined plane.

[0011] According to the above-described rail transit intelligent power supply system, a vortex channel is formed in the accommodation box, and the vortex channel is communicatively connected to the inlet. The tail of the window-opening chain is placed in the vortex channel through the inlet.

[0012] According to the above-described rail transit intelligent power supply system, the pantograph support device further includes a housing fixed to the top of the train of the rail transit. The pantograph support device is installed in the housing. The top of the housing has an opening. The pantograph support device is located below the opening. The connecting plate is fixed to the top of the train of the rail transit. An automatic door is provided at the opening to open or close the opening. A controller is provided in the housing. The automatic door, the first microswitch, the second microswitch, the motor, and the two translation driving devices are respectively connected to the controller and controlled by it. The use of the housing enables the pantograph and the pantograph support device to be accommodated in the housing, so as to be able to be accommodated when not in use, and to solve the technical problem in the prior art that due to the too large volume, it cannot be accommodated and shielded, resulting in being exposed outside for a long time, requiring frequent maintenance, and having a poor service life.

[0013] According to the above-described rail transit intelligent power supply system, positioning grooves and long accommodating grooves that correspond to each other are respectively provided on opposite sides of the opening. A long guiding groove is provided at the lower side of the long accommodating groove. A door panel is provided in the long accommodating groove. A translation device is fixed to the bottom surface of the lower side of the long accommodating groove. The driving part of the translation device passes through the long guiding groove and is connected to the door panel.

[0014] The rail transit intelligent power supply system designed by the present invention is small in volume, reduces the space occupation on the top of the train, reduces the weight, is convenient for modular disassembly and assembly, and has a high degree of automation during use; at the same time, by symmetrically distributing two support mechanisms in the front and back, the support strength required when the pantograph contacts and rubs against the power supply frame is satisfied. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a schematic diagram of the overall structure;

[0016] Figure 2 is a schematic diagram of the structure of the window-opening chain of the pantograph support device in the extended state;

[0017] Figure 3 is a schematic diagram of the structure of the window-opening chain of the pantograph support device in the retracted state;

[0018] Figure 4 is a schematic diagram of the back structure of the support mechanism;

[0019] Figure 5 is an enlarged view of part A;

[0020] Figure 6 is a top view of the support mechanism

[0021] Figure 7It is a schematic structural diagram of the cooperation between the movable sleeve and the rotating shaft;

[0022] Figure 8 It is a schematic structural diagram of the cooperation between the movable sleeve and the rotating shaft. Specific embodiments

[0023] In order to enable those skilled in the art to better understand the present invention and thus more clearly define the scope of protection required by the present invention, the present invention will be described in detail below with respect to certain specific embodiments of the present invention. It should be noted that the following are only some specific embodiments of the concept of the present invention, and only a part of the embodiments of the present invention. The specific and direct descriptions of the relevant structures are only for the convenience of understanding the present invention, and each specific feature does not of course and directly limit the scope of implementation of the present invention. Conventional selections and substitutions made by those skilled in the art under the guidance of the concept of the present invention should be regarded as within the scope of protection required by the present invention.

[0024] The rail transit intelligent power supply system described in this embodiment, as Figure 1-8 shown, the specific structure is described as follows:

[0025] It includes a power supply rack 1 and a pantograph 2. The pantograph 2 is electrically connected to the train power supply system of the rail transit through a cable, and the power supply rack 1 is electrically connected to the rail transit power supply station through a cable. When the power supply rack 1 contacts the pantograph 2, the power supply battery of the train power supply system is charged.

[0026] It further includes a pantograph support device 3 for elastically supporting the pantograph 2. The pantograph support device 3 is installed on the top of the train of the rail transit. The pantograph support device 3 includes a support spring 312 and two relatively and juxtaposed support mechanisms 31; both support mechanisms 31 include a fixing plate 314, a first guide member 327, a second guide member 328, two window-opening chains 311, and two symmetrically arranged sprockets 315; the two window-opening chains 311 are arranged symmetrically with each other, and the meshing surfaces of each window-opening chain 311 face the two support springs 312 respectively. The backs of the two window-opening chains 311 are arranged oppositely. Since the window-opening chain 311 can only bend in the direction of the support spring 312, the backs of the two window-opening chains 311 can abut against each other to support the pantograph 2. At the same time, since the head ends of the two window-opening chains 311 of each support mechanism 31 are fixedly arranged with the pantograph 2, the movement between the pantograph 2 and the head ends of the window-opening chains 311 is avoided. Therefore, based on the above arrangement of the two window-opening chains 311, the pantograph 2 can be sufficiently supported to contact the power supply rack 1.

[0027] The fixing plate 314 is installed on the top of the train in rail transit. The first guiding member 327 and the second guiding member 328 are fixed to the installation surface of the fixing plate 314. The first guiding member 327 is located below the second guiding member 328. The first guiding member 327 includes two symmetrically arranged guiding concave portions 329. Each guiding concave portion 329 includes an arc-shaped concave surface 330. Vertically extending planes 332 and inclined planes 331 are respectively formed at both ends of the arc-shaped concave surface 330. The arc-shaped concave surface 330, the vertically extending planes 332 and the inclined planes 331 are combined to form a chain guiding surface. Each sprocket 315 is respectively located beside the two arc-shaped concave surfaces 330. The two sprockets 315 are respectively rotatably installed on the fixing plate 314 through rotating shafts 316. The center of the arc-shaped concave surface 330 coincides with the center of the sprocket 315. Each windowed chain 311 is respectively placed between the two arc-shaped concave surfaces 330 and the sprockets 315. And the meshing surface of the windowed chain 311 meshes and drives with the sprocket 315. The back surface of the windowed chain 311 is attached to the chain guiding surface. Based on this setting, the meshing surface of the windowed chain 311 can always mesh with the sprocket 315, so as to ensure that when the sprocket 315 rotates, it drives the windowed chain 311 to extend and retract, or when the pantograph 2 floats due to the different heights of the power supply frame 1, it drives the windowed chain 311 to extend and retract and drives the sprocket 315 to rotate.

[0028] The second guiding member 328 is located above the upper end of the vertically extending plane 332. A guiding channel 336 for the two windowed chains 311 to pass through is provided on the second guiding member 328. The outer walls and the meshing surface on the front and rear sides of the windowed chain 311 are respectively in contact with the inner wall of the guiding channel 336, so that the windowed chain 311 is stable and reliable when extending and retracting. A driving mechanism for driving the two sprockets 315 to rotate relatively is arranged on the back surface of the fixing plate 314. The driving mechanism is respectively in transmission connection with the rotating shafts 316 on the two sprockets 315 through two clutches. A supporting plate 313 is fixed between the fixing plates 314 of the two supporting mechanisms 31. Both ends of the supporting spring 312 are respectively connected with the pantograph 2 and the supporting plate 313. When it is necessary to drive the sprocket 315 to rotate, the clutch can be in an engaged state. When it is not necessary to drive the sprocket 315 to rotate, the clutch can be in a disengaged state. In the disengaged state, the driving mechanism cannot drive the sprocket 315 to rotate, so that the supporting spring 312 controls the windowed chain 311 to be in an extended state, or in the engaged state, the driving mechanism controls the sprocket 315 to rotate and the windowed chain 311 extends and retracts.

[0029] The controller includes a data acquisition module for obtaining data on the approaching train at the rail transit control center. When the data acquisition module does not receive the data on the approaching train at the rail transit control center, the controller controls the clutch to be in the engaged state, that is, the driving mechanism is connected to the rotating shaft 316 on the sprocket 315, so that the driving mechanism drives the two sprockets 315 to rotate relative to each other, prompting the window-opening chain 311 to retract, thereby retracting the pantograph 2 and prompting the pantograph 2 to be in the retracted state to separate from the power supply frame 1, enabling the train to run normally.

[0030] When the data acquisition module receives the data on the approaching train at the rail transit control center, the controller controls the clutch to be in the disengaged state, and the driving mechanism is separated from the rotating shaft 316 on the sprocket 315, so that the window-opening chain 311 is in the extended state under the action of the support spring 312, and the pantograph 2 is in the rising state to abut against the power supply frame 1; when extending, the clutch is engaged, the driving mechanism drives the two sprockets 315 to rotate relative to each other to prompt the window-opening chain 311 to extend, and then the clutch is separated.

[0031] The driving mechanism includes a motor 337, a driving gear 335, two driven gears 317, and a mounting plate 319 disposed away from the back surface of the fixed plate 314. The mounting plate 319 is fixed to the back surface of the fixed plate 314 through a support column. The driving gear 335 and the two driven gears 317 are respectively rotatably mounted on the mounting plate 319 through a rotating shaft 318. The rotating shaft 316 of the motor 337 is connected to the center of the driving gear 335. The driving gear 335 is in meshing transmission with one driven gear 317, and the two driven gears 317 are in meshing transmission with each other. The rotating shaft 316 of the motor 337 is fixed to the center part of the driving gear 335; the motor 337 is used to drive a driving gear 335 to rotate, and then the two driven gears 317 rotate relative to each other, further driving the two sprockets 315 to rotate relative to each other, so as to drive the window-opening chain 311 to expand and contract under the action of the engagement between the chain and the sprocket 315. The clutch includes two movable sleeves 338 and two clutch driving mechanisms. Each movable sleeve 338 is respectively sleeved on the end of the rotating shaft 318 on the two driven gears 317. The outer wall of the end of the two rotating shafts 318 is formed with a plurality of externally toothed parts arranged in an annular array. External tooth grooves are formed between the externally toothed parts. The inner walls of the two movable sleeves 338 are both formed with a plurality of internally toothed parts arranged in an annular array. Internal tooth grooves are formed between the internally toothed parts, and the externally toothed parts are fitted in the internal tooth grooves, and the internally toothed parts are fitted in the external tooth grooves. Each clutch driving mechanism is respectively connected to the two movable sleeves 338. The outer wall of the end of the rotating shaft 316 on the two sprockets 315 is formed with a plurality of externally toothed parts arranged in an annular array. Engagement grooves are formed between the externally toothed parts. When engaging, the externally toothed parts are fitted in the internal tooth grooves, and the internally toothed parts are fitted in the engagement grooves, so that the connection strength can be ensured. When separating, the externally toothed parts are separated from the internal tooth grooves.

[0032] Furthermore, both of the clutch driving mechanisms include a connecting plate 320 fixed to the bottom of the back surface of the fixed plate 314. A horizontal translation driving device 321 is provided on the connecting plate 320. A driving rod 322 is installed on the driving part of the translation driving device 321. The driving rod 322 is connected to the movable sleeve 338. The translation driving device 321 is a lead screw slider, so as to drive the driving rod 322 to translate to make the movable sleeve 338 sleeved on the rotating shaft 316 of the sprocket 315, that is, the engaged state, or the movable sleeve 338 is separated from the rotating shaft 316 of the sprocket 315, that is, the separated state. And there are gaps at the ends of the rotating shaft 316 and the rotating shaft 318. The rotating shaft 316 and the rotating shaft 318 are respectively installed on two plates through bearings.

[0033] In this embodiment, a first micro switch 323 is installed on each second guide member 328. Limit rods 325 are provided at the head end and the tail end of each window opening chain 311. A second micro switch 324 and a stop rod are installed on the side opposite to the tail end of the inclined plane 331 through a mounting block. The stop rod is close to the tail end of the inclined plane 331. The contact piece of the second micro switch 324 is located in front of the baffle. The first micro switch 323 is used in cooperation with the limit rod 325 at the head end of the window opening chain 311 to achieve limit control when the window opening chain 311 retracts. The second micro switch 324 is used in cooperation with the limit rod 325 at the tail end of the window opening chain 311 to achieve limit control when the window opening chain 311 extends. When the limit rod 325 at the head end contacts the contact piece of the first micro switch 323, the motor 337 can be controlled to stop, that is, retract to the maximum extent. When the limit rod 325 at the tail end contacts the second micro switch 324, the motor 337 can also be controlled to stop, that is, extend to the maximum extent, so as to ensure the reliability of the electric control of the window opening chain 311 when it extends or retracts, and improve the service performance.

[0034] Furthermore, a receiving box is connected to the tail end of the inclined plane 331 of each guiding concave 329. A chain inlet is provided on the receiving box. The second micro switch 324 and the stop rod are both located between the inlet and the tail end of the inclined plane 331. A vortex channel 334 is formed in the receiving box, and the vortex channel 334 is communicated with the inlet. The tail of the window opening chain 311 is placed in the vortex channel 334 through the inlet, mainly to realize the storage of the retracted window opening chain 311. The setting of the vortex channel 334 also facilitates the extension of the window opening chain 311.

[0035] In this embodiment, the pantograph support device 3 further includes a housing 301 fixed to the top of the train of rail transit. The pantograph support device 3 is installed inside the housing 301. The top of the housing 301 has an opening 300. The pantograph support device 3 is located below the opening 300, and the connecting plate 320 is fixed to the top of the train of rail transit. An automatic door is provided at the opening 300 to open or close the opening 300. A controller is provided inside the housing 301. The automatic door, the first microswitch 323, the second microswitch 324, the motor 337, and the two translation driving devices 321 are respectively connected to and controlled by the controller. Preferably, positioning grooves 302 and long accommodating grooves 301 are correspondingly provided on opposite sides of the opening 300. A long guiding groove 305 is provided at the lower side of the long accommodating groove 301. A door panel 304 is provided in the long accommodating groove 301. A translation device 303 is fixed to the bottom surface of the lower side of the long accommodating groove 301. The driving part of the translation device 303 passes through the long guiding groove 305 and is connected to the door panel 304. The translation device 303 is also a lead screw slide. The opening 300 is larger than the pantograph support device 3 and the pantograph 2. After the window opening chain 311 retracts, the pantograph 2 is located inside the housing 301 and below the opening 300. At this time, it is necessary to close the opening 300. When the opening 300 is closed, the translation device 303 drives the door panel 304 to be located above the pantograph 2, and then one end of the door panel 304 is inserted into the positioning groove 302. A sealing layer can be provided between the upper inner wall of the positioning groove 302 and the upper outer wall of the door panel 304, and a sealing layer can be provided between the upper inner wall of the long accommodating groove 301 and the upper outer wall of the door panel 304, so as to achieve the effect of waterproofing and dustproofing.

[0036] A support rod is also fixed on the support plate 313, and the end of the support rod is fixedly connected to the inner wall of the housing 301.

[0037] In this embodiment, an electromagnetic switch 32 is further provided below a driven gear 317. The electromagnetic switch 32 includes a housing 33, and a moving iron core 35 and a static iron core 34 located inside the housing 33. The moving iron core 35 is located above the static iron core 34. A spring is abutted between the moving iron core 35 and the static iron core 34. A clamping rod is provided on the moving iron core 35. An electromagnetic coil is provided around the static iron core 34. The electromagnetic coil is connected to the control through a switch 36. The clamping rod penetrates through the upper end of the housing 33, and the clamping rod corresponds to the tooth groove position of the driven gear 317. After the pantograph 2 is retracted into the housing 301, the controller controls the switch 36 to disconnect, so that the moving iron core 35 and the static iron core 34 are separated, and then the clamping rod is inserted into the tooth groove of the driven gear 317 for clamping to prevent the pantograph 2 from rebounding under the action of the support spring 312. When it is necessary to control the telescopic movement of the window opening chain 311, the control switch 36 is controlled to be attracted. The switch 36 can be a relay. The electromagnetic coil on the static iron core 34 is energized, the moving iron core 35 and the static iron core 34 are attracted, and the clamping rod is in the retracted state and separated from the tooth groove of the driven gear 317.

[0038] The power supply system of this embodiment. Among them, the controller can be a PLC controller. When the data acquisition module does not receive the data that the train is about to enter the station from the rail transit control center and receives the signal indicating that the charging of the train power system is completed, the controller controls the clamping rod of the electromagnetic switch 32 to retract, and then controls the clutch to be in the engaged state by using the controller, that is, the driving mechanism is connected to the rotating shaft 316 on the sprocket 315, so that the driving mechanism drives the two sprockets 315 to rotate relatively to cause the window opening chain 311 to retract. When the limiting rod 325 at the head end retracts to contact the first microswitch 323, the controller controls the motor 337 to stop, thereby retracting the pantograph 2 and causing the pantograph 2 to be in the retracted state to separate from the power supply frame 1. Moreover, the controller then controls the clamping rod of the electromagnetic switch 32 to extend to clamp the driven gear 317, so that the train can run normally.

[0039] When the data acquisition module receives the data that the train is about to enter the station from the rail transit control center, the controller controls the clamping rod of the electromagnetic switch 32 to retract, and then controls the clutch to be in the engaged state by using the controller, that is, the driving mechanism is connected to the rotating shaft 316 on the sprocket 315, so that the driving mechanism drives the two sprockets 315 to rotate relatively to cause the window opening chain 311 to extend. When the limiting rod 325 at the tail end extends to contact the second microswitch 324, the controller controls the motor 337 to stop. At this time, the controller works to control the clutch to be in the separated state, and the driving mechanism is separated from the rotating shaft 316 on the sprocket 315. Moreover, the window opening chain 311 is in the extended state under the action of the support spring 312, and the pantograph 2 is in the raised state to contact the power supply frame 1. At this time, the clutch is controlled to be separated. In this state, the controller controls the clamping rod of the electromagnetic switch 32 to always retract.

[0040] All the above fixing methods can be fixed by bolts or welding, and can be selected according to the actual situation.

[0041] The above is only the preferred embodiment of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the technical principle of the present invention, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present invention.

Claims

1. An intelligent power supply system for rail transit, comprising a power supply rack (1) and a pantograph (2), characterized in that, The invention also includes a controller and a pantograph support device (3) for elastically supporting the pantograph (2); the pantograph support device (3) is installed on the top of a rail transit train; the pantograph support device (3) includes a support spring (312) and two support mechanisms (31) arranged oppositely and in parallel; the two support mechanisms (31) each include a fixing plate (314), a first guide member (327), a second guide member (328), two window opening chains (311), and two symmetrically arranged sprockets (315); the fixing plate (314) is installed on the top of the rail transit train; the first guide member (327) ) and a second guide member (328) are fixed to the mounting surface of the fixed plate (314), the first guide member (327) includes two symmetrically arranged guide concave portions (329), each guide concave portion (329) includes an arcuate concave surface (330), two ends of the arcuate concave surface (330) are extended to form a vertical plane (332) and an inclined plane (331), the arcuate concave surface (330), the vertical plane (332) and the inclined plane (331) are combined to form a chain guide surface, each sprocket (315) is located on the side of the two arcuate concave surfaces (330), and the two sprockets (315) are respectively connected to the chain guide surface by the rotating shaft (31 6) is rotatably mounted on the fixed plate (314), the center of the arc concave surface (330) is arranged to coincide with the center of the sprocket (315), each window opening chain (311) is respectively placed between the arc concave surface (330) and the sprocket (315) at two locations, and the meshing surface of the window opening chain (311) is meshed with the sprocket (315), and the back of the window opening chain (311) is in contact with the chain guide surface; the second guide member (328) is located above the vertical plane (332), and the second guide member (328) is provided with a guide channel (336) for the two window opening chains to pass through, and the two window opening chains of each support mechanism (31) are respectively arranged between the arc concave surface (330) and the sprocket (315), and the meshing surface of the window opening chain (311) is meshed with the sprocket (315), and the back of the window opening chain (311) is in contact with the chain guide surface; the second guide member (328) is located above the vertical plane (332), and the second guide member (328) is provided with a guide channel (336) for the two window opening chains to pass through. The head ends (311) are fixed to the pantograph (2), a driving mechanism for driving the two sprockets (315) to rotate relative to each other is arranged on the back of the fixing plate (314), the driving mechanism is respectively connected to the rotating shafts (316) on the two sprockets (315) through two clutches, a support plate (313) is fixed between the fixing plates (314) of the two support mechanisms (31), and the two ends of the support spring (312) are respectively connected to the pantograph (2) and the support plate (313); the driving mechanism is connected to and controlled by the controller, and the controller includes a data acquisition module for obtaining data of trains about to enter the station from the rail transit control center; When the clutch is in a disengaged state, the driving mechanism is separated from the rotating shaft (316) on the sprocket (315), so that the window opening chain (311) is in an extended state under the action of the supporting spring (312), and the pantograph (2) is urged to be in an ascending state so as to contact the power supply frame (1); When the clutch is in the engaged state, the drive mechanism is connected to the rotating shaft (316) on the sprocket (315) so that the drive mechanism drives the two sprockets (315) to rotate relative to each other, causing the window-opening chain (311) to retract, and causing the pantograph (2) to be in a retracted state and separated from the power supply frame (1).

2. The intelligent power supply system for rail transit according to claim 1, characterized in that, The drive mechanism includes a motor (337), a driving gear (335), two driven gears (317), and a mounting plate (319) disposed away from the back surface of the fixing plate (314). The driving gear (335) and the two driven gears (317) are respectively rotatably mounted on the mounting plate (319) through a rotating shaft (318). The rotating shaft (316) of the motor (337) is connected to the center of the driving gear (335). The driving gear (335) is in meshing transmission with one driven gear (317), and the two driven gears (317) are in meshing transmission with each other. The rotating shaft (316) of the motor (337) is fixed to the center of the driving gear (335). The clutch includes two movable sleeves (338) and two clutch driving mechanisms. Each movable sleeve (338) is respectively sleeved on the end of the rotating shaft (318) on the two driven gears (317). A plurality of externally toothed portions arranged in an annular array are formed on the outer wall of the end of the two rotating shafts (318). External tooth grooves are formed between the externally toothed portions. A plurality of internally toothed portions arranged in an annular array are formed on the inner wall of the two movable sleeves (338). Internal tooth grooves are formed between the internally toothed portions. And the externally toothed portions are fitted in the internal tooth grooves, and the internally toothed portions are fitted in the external tooth grooves. Each clutch driving mechanism is respectively connected to the two movable sleeves (338). A plurality of engaging teeth arranged in an annular array are formed on the outer wall of the end of the rotating shaft (316) on the two sprockets (315). Engaging grooves are formed between the engaging teeth. When engaged, the engaging teeth are fitted in the internal tooth grooves, and the internally toothed portions are fitted in the engaging grooves.

3. The intelligent power supply system for rail transit according to claim 2, characterized in that, Both of the two clutch driving mechanisms include a connecting plate (320) fixed to the bottom of the back surface of the fixing plate (314). A horizontal translation driving device (321) is arranged on the connecting plate (320). A driving rod (322) is mounted on the driving part of the translation driving device (321). The driving rod (322) is connected to the movable sleeve (338).

4. The intelligent power supply system for rail transit according to claim 3, wherein A first microswitch (323) is mounted on each second guiding member (328). Limit rods (325) are arranged at the head end and the tail end of each window-opening chain (311). A second microswitch (324) and a stop rod are mounted on the side opposite to the tail end of the inclined plane (331) through a mounting block. The stop rod is close to the tail end of the inclined plane (331). The contact piece of the second microswitch (324) is located in front of the baffle plate.

5. The rail transit intelligent power supply system according to claim 4, characterized in that, A receiving box is connected to the tail end of the inclined plane (331) of each guiding concave (329). A chain inlet is arranged on the receiving box. The second microswitch (324) and the stop rod are both located between the inlet and the tail end of the inclined plane (331).

6. The intelligent power supply system for rail transit according to claim 5, wherein, A vortex channel (334) is formed in the receiving box, and the vortex channel (334) is communicated with the inlet. The tail of the window-opening chain (311) is placed in the vortex channel (334) through the inlet.

7. The rail transit intelligent power supply system according to claim 6, wherein The pantograph support device (3) further includes a housing fixed to the top of a rail transit train. The pantograph support device (3) is installed inside the housing. The top of the housing has an opening (300). The pantograph support device (3) is located below the opening (300), and the connecting plate (320) is fixed to the top of the rail transit train. An automatic door is provided at the opening (300) to open or close the opening (300). A controller is provided inside the housing. The automatic door, the first microswitch (323), the second microswitch (324), the motor (337), and the two translation driving devices (321) are respectively connected to the controller and controlled by it.

8. The intelligent power supply system for rail transit according to claim 7, characterized in that, Positioning grooves (302) and elongated accommodating grooves are respectively provided on opposite sides of the opening (300). An elongated guiding groove (305) is provided at the lower side of the elongated accommodating groove. A door panel (304) is provided in the elongated accommodating groove. A translation device (303) is fixed to the bottom surface of the lower side of the elongated accommodating groove. The driving part of the translation device (303) passes through the elongated guiding groove (305) and is connected to the door panel (304).

Images