Urban rail train traction device capable of recycling braking energy

Abstract

The invention discloses an urban rail train traction device capable of recycling braking energy, and relates to the technical field of train traction, the urban rail train traction device comprises a mounting hanger, the middle part of the mounting hanger is rotatably connected with a buffer part, and the buffer part is provided with a coupling part in the direction away from the mounting hanger. By utilizing the friction temperature rise between the crushing pipe body and the sliding sleeve, the memory metal rod is heated to expand, the ball plug automatically opens the oil outlet pipe, and the outer wall of the crushing pipe body can be automatically and uniformly coated with lubricating oil in cooperation with the telescopic sliding of the sliding sleeve, so that the friction between the crushing pipe body and the sliding sleeve can be effectively reduced, the friction loss of the crushing pipe body is reduced, and the service life of the crushing pipe body is prolonged. Meanwhile, friction energy consumption of train operation is reduced, consumption of stored energy is reduced, more energy can be saved for other electrical systems of the train, and sufficient recycling of braking energy is facilitated.

Description

Technical Field

[0001] The invention relates to the technical field of train traction, and in particular to a traction device for an urban rail train that recycles braking energy. Background Art

[0002] The principle of generating regenerative braking energy involves the comprehensive application of electromagnetism, dynamics and energy conversion. The core lies in the conversion of the operating states of the motor and the generator. Under the normal operating state of the vehicle, the motor is used as a power source, and its function is to convert the electrical energy provided by the on-board power supply into mechanical energy to drive the vehicle. However, during the braking process, the function of the motor is transformed into a generator, which uses the kinetic energy of the vehicle during deceleration to convert mechanical energy into electrical energy according to Faraday's law of electromagnetic induction. In the urban rail transit system, the use of electrical energy is more efficient and flexible. It is converted into alternating current through an inverter, and the converted electrical energy will flow into the DC power supply system for energy storage and management. In this link, the electrical energy can be temporarily stored in supercapacitors or battery packs as reserve energy for subsequent use, for use by other trains that are accelerating or running, or directly used to meet the needs of other electrical systems of the vehicle, so as to achieve the effect of braking energy reuse;

[0003] In the prior art, the power of traditional urban rail transit traction devices generally uses linear motors to implement magnetic suspension. At present, in order to solve the contradiction between high efficiency and high cost of traditional linear motors in long-distance drive systems, new flux switching linear traction motors for rail transit are being studied. The motor uses the stored vehicle regenerative braking energy as the driving force. Compared with traditional linear motors for rail transit, it has the advantages of high efficiency, high power factor, and low cost. However, the hook buffer device of the rail train needs to be optimized. When the train brakes, the buffer generally absorbs energy through elasticity, and the crush tube absorbs a large amount of collision energy through rapid plastic deformation to ensure the braking safety of the train. However, the crush tube is constantly worn out by friction during long-term use, which may cause it to break due to insufficient bearing pressure during emergency braking, thereby causing safety accidents.

[0004] In addition, the current coupling device is prone to wear and failure during train operation, so it requires maintenance personnel to regularly inspect and maintain it. When an accident occurs, it also takes a lot of time to investigate the cause of the accident, which increases the workload of train maintenance personnel and reduces their work efficiency.

[0005] In view of this, the present invention proposes a traction device for urban rail trains that recycles braking energy to compensate for and improve the deficiencies of the prior art. Summary of the invention

[0006] In order to solve the above technical problems, the present invention provides an urban rail train traction device that can reduce the friction loss of the crush tube body; can ensure the uniformity of the lubricating oil application and avoid lubricating oil clogging; and can perform multi-angle and all-round detection of the crush tube body and reuse the braking energy, so as to solve the corresponding technical problems raised in the above background technology.

[0007] In order to achieve the above purpose, the technical solution adopted by the present invention is: a traction device for urban rail trains for recycling braking energy, comprising a mounting hanger, a buffer is rotatably connected to the middle of the mounting hanger, and a connecting hanger is installed in the direction away from the mounting hanger, and also includes:

[0008] Automatic lubrication mechanism, used to automatically release lubricating oil according to friction temperature to reduce friction loss;

[0009] The multi-angle monitoring mechanism is used to detect worn parts at multiple angles during train traction and braking.

[0010] Preferably, the automatic lubrication mechanism includes a sliding sleeve rotatably connected to the middle part of the connecting part, the inner wall of the sliding sleeve is slidably connected to a crush tube body, the side of the crush tube body away from the sliding sleeve is slidably connected to the inner wall of the buffer, the top of the sliding sleeve is fixedly connected to a heat conducting plate, the top of the heat conducting plate is fixedly connected to a heat collecting block, the outer wall of the heat collecting block is fixedly connected to an oil storage tank, the four corners of the bottom of the oil storage tank are fixedly connected to the sliding sleeve, and an oil inlet is opened on the top edge of the oil storage tank.

[0011] Preferably, the automatic lubrication mechanism also includes a telescopic rod slidably connected to the top of the heat collecting block, a slide groove is opened in the middle of the heat collecting block, a memory metal rod is fixedly connected to the bottom of the heat collecting block, the outer wall of the memory metal rod is located in the slide groove, the top of the memory metal rod is fixedly connected to the telescopic rod, the top of the telescopic rod is rotatably connected to a pull rod, and the side of the pull rod away from the telescopic rod is fixedly connected to a ball plug.

[0012] Preferably, the automatic lubrication mechanism also includes an oil outlet pipe fixedly passing through the bottom of the oil storage tank, the top of the oil outlet pipe is fixedly connected to an oil guide hopper, a pair of circular holes are formed on the side of the oil guide hopper close to the oil outlet pipe, a return spring is fixedly connected to the side of the oil guide hopper away from the oil outlet pipe, one end of the return spring close to the oil outlet pipe is fixedly connected to the outer wall of the ball plug, the ball plug is slidably connected to the inner wall of the oil guide hopper, and the side of the ball plug away from the return spring is clamped to the inner wall of the oil outlet pipe.

[0013] Preferably, the automatic lubrication mechanism also includes an oil separator fixedly connected to the bottom of the oil outlet pipe, the bottom of the oil outlet pipe penetrates the outer wall of the heat conducting plate and extends to the inner wall of the sliding sleeve, the outer wall of the oil separator is fixedly connected to the inner wall of the sliding sleeve, and a plurality of oil outlets are equidistantly provided on the inner side of the oil separator, and the plurality of oil outlets are all connected to the interior of the sliding sleeve.

[0014] Preferably, the multi-angle monitoring mechanism includes a swivel rotatably connected to the outer wall of the sliding sleeve, the swivel is located on the side of the sliding sleeve close to the buffer, the swivel is fixedly connected to a slider on the outer wall of the swivel away from the sliding sleeve, a detection camera is fixedly connected to the top side wall of the swivel, a constant temperature protective cover is fixedly connected to the side of the buffer close to the sliding sleeve, a threaded groove is provided on the inner wall of the constant temperature protective cover, and the slider is slidably connected in the threaded groove.

[0015] Preferably, the number of turns of the thread groove is set to one turn.

[0016] Preferably, the oil guide funnel is arranged in a funnel shape.

[0017] Preferably, the heat collecting block is arranged in a flat-top cone shape.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] 1. During the operation of the train, the automatic lubrication mechanism is set up, and the friction between the crush tube body and the sliding sleeve is used to increase the temperature, so that the memory metal rod expands due to heat, and the ball plug automatically opens the oil outlet pipe. In conjunction with the telescopic sliding of the sliding sleeve, the outer wall of the crush tube body can be automatically and evenly coated with lubricating oil, which can effectively reduce the friction between the crush tube body and the sliding sleeve, reduce the friction loss of the crush tube body, so as to increase its service life and avoid accidental breakage of the coupler. At the same time, reducing the friction energy consumption of the train operation is also conducive to reducing the consumption of reserve energy. The saved energy can be used more for other electrical systems of the vehicle, which is conducive to the full reuse of braking energy;

[0020] 2. When the oil outlet pipe is opened, through the setting of the oil separator and the circular hole, under the action of gravity, part of the lubricating oil in the oil storage tank reaches the oil outlet pipe through the gap between the oil guide bucket and the ball plug, and the other part quickly reaches the oil outlet pipe from the circular holes on both sides of the oil guide bucket, so that the inner wall of the oil separator is quickly filled with lubricating oil, effectively avoiding the blockage of lubricating oil. In addition, the annular oil separator, combined with the equidistantly distributed oil outlet setting, allows the lubricating oil to evenly enter the inner wall of the sliding sleeve, ensuring the uniformity of lubricating oil smearing on the crushing tube body;

[0021] 3. Through the setting of the multi-angle monitoring mechanism, when the crush tube body and the sliding sleeve move in extension and contraction, since the constant temperature protective cover remains stationary, the slider can continuously slide along the thread track of the thread groove, thereby driving the swivel to rotate in the opposite direction, and finally driving the detection camera to maintain the detection state and rotate around the crush tube body to perform multi-angle and all-round detection. Once the crush tube body is found to have cracks or other breakage-prone conditions, an alarm can be issued in time for maintenance, saving troubleshooting time. In addition, the setting of the constant temperature protective cover can disperse the impact force on the crush tube body when the train brakes, further enhancing the safety of train operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall structure of a preferred embodiment of the present invention;

[0023] Figure 2 It is a three-dimensional cross-sectional view of the protective cover shown in the present invention;

[0024] Figure 3 It is a structural schematic diagram of the connection of the slider shown in the present invention;

[0025] Figure 4 It is a structural schematic diagram of the connection of the heat collecting block shown in the present invention;

[0026] Figure 5 It is a structural schematic diagram of the oil separator connection shown in the present invention;

[0027] Figure 6 It is a structural schematic diagram of the connection of the telescopic rod shown in the present invention;

[0028] Figure 7 It is a structural schematic diagram of the ball plunger connection shown in the present invention.

[0029] The numbers in the figure are:

[0030] 1. Install hanging parts; 2. Buffer parts; 3. Connecting parts;

[0031] 4. Automatic lubrication mechanism; 41. Sliding sleeve; 42. Oil storage tank; 43. Heat conducting sheet; 44. Compression tube body; 45. Oil inlet; 46. Heat collecting block; 47. Oil guide hopper; 48. Oil outlet pipe; 49. Oil distributor; 410. Oil outlet; 411. Ball plug; 412. Return spring; 413. Pull rod; 414. Telescopic rod; 415. Memory metal rod; 416. Round hole;

[0032] 5. Multi-angle monitoring mechanism; 51. Constant temperature protection cover; 52. Thread groove; 53. Slider; 54. Swivel; 55. Detection camera. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] Embodiments of the present invention

[0035] Please refer to Figures 1 to 7 As shown, a traction device for urban rail trains for reusing braking energy includes a mounting hanger 1, a buffer 2 is rotatably connected to the middle of the mounting hanger 1, and a connecting hanger 3 is installed on the buffer 2 away from the mounting hanger 1, and also includes:

[0036] An automatic lubrication mechanism 4, used to automatically release lubricating oil according to the friction temperature to reduce friction loss;

[0037] A multi-angle monitoring mechanism 5, used for detecting wear parts at multiple angles during train traction and braking;

[0038] The automatic lubrication mechanism 4 includes a sliding sleeve 41 rotatably connected to the middle of the connecting member 3, the inner wall of the sliding sleeve 41 is slidably connected to a crushing pipe body 44, the side of the crushing pipe body 44 away from the sliding sleeve 41 is slidably connected to the inner wall of the buffer 2, the top of the sliding sleeve 41 is fixedly connected to a heat conducting sheet 43, the top of the heat conducting sheet 43 is fixedly connected to a heat collecting block 46, the outer wall of the heat collecting block 46 is fixedly connected to an oil storage tank 42, the four corners of the bottom of the oil storage tank 42 are fixedly connected to the sliding sleeve 41, and an oil inlet 45 is opened at the top edge of the oil storage tank 42;

[0039] The automatic lubrication mechanism 4 also includes a telescopic rod 414 slidably connected to the top of the heat collecting block 46, a slide groove is opened in the middle of the heat collecting block 46, a memory metal rod 415 is fixedly connected to the bottom of the heat collecting block 46, the outer wall of the memory metal rod 415 is located in the slide groove, the top of the memory metal rod 415 is fixedly connected to the telescopic rod 414, the top of the telescopic rod 414 is rotatably connected to the pull rod 413, and the side of the pull rod 413 away from the telescopic rod 414 is fixedly connected to the ball plug 411;

[0040] The automatic lubrication mechanism 4 also includes an oil outlet pipe 48 fixedly passing through the bottom of the oil storage tank 42, the top of the oil outlet pipe 48 is fixedly connected to an oil guide hopper 47, a pair of round holes 416 are opened on the side of the oil guide hopper 47 close to the oil outlet pipe 48, a return spring 412 is fixedly connected to the side of the oil guide hopper 47 away from the oil outlet pipe 48, one end of the return spring 412 close to the oil outlet pipe 48 is fixedly connected to the outer wall of the ball plug 411, the ball plug 411 is slidably connected to the inner wall of the oil guide hopper 47, and the side of the ball plug 411 away from the return spring 412 is clamped to the inner wall of the oil outlet pipe 48;

[0041] The automatic lubrication mechanism 4 further includes an oil separator 49 fixedly connected to the bottom of the oil outlet pipe 48. The bottom of the oil outlet pipe 48 penetrates the outer wall of the heat conducting plate 43 and extends to the inner wall of the sliding sleeve 41. The outer wall of the oil separator 49 is fixedly connected to the inner wall of the sliding sleeve 41. A plurality of oil outlets 410 are equidistantly provided on the inner side of the oil separator 49. The plurality of oil outlets 410 are all connected to the interior of the sliding sleeve 41.

[0042] The oil guide hopper 47 is arranged in a funnel shape;

[0043] The heat collecting block 46 is arranged in a flat-topped cone shape;

[0044] Wherein: the memory metal rod 415 is set to nickel-titanium alloy, and its phase change temperature is designed to be above room temperature according to the specific region, which is used to judge the state of friction heating of the sliding sleeve 41, and the oil separator 49 is set in a circular ring shape.

[0045] The effects achieved by this embodiment are as follows: In the prior art, when a train brakes, energy is generally absorbed through the elasticity of the buffer, and the crush tube absorbs a large amount of collision energy through rapid plastic deformation to ensure the braking safety of the train. However, the crush tube is constantly worn out by friction during long-term use, which can easily lead to its failure due to insufficient bearing pressure during emergency braking, thereby causing a safety accident. Compared with the prior art, through the implementation of this embodiment, the automatic lubrication mechanism 4 is set to utilize the friction between the crush tube body 44 and the sliding sleeve 41 to heat up the memory metal rod 415, automatically allowing the ball plug 411 to open the oil outlet pipe 48, and cooperate with the telescopic sliding of the sliding sleeve 41, so that the outer wall of the crush tube body 44 can be automatically and evenly coated with lubricating oil, which can effectively reduce the friction between the crush tube body 44 and the sliding sleeve 41, and reduce the friction loss of the crush tube body 44, so as to enhance its service life.

[0046] Further examples:

[0047] Please refer to Figures 1 to 3 As shown, the multi-angle monitoring mechanism 5 includes a swivel 54 rotatably connected to the outer wall of the sliding sleeve 41, the swivel 54 is located on the side of the sliding sleeve 41 close to the buffer 2, the outer wall of the swivel 54 away from the sliding sleeve 41 is fixedly connected to a slider 53, the top side wall of the swivel 54 is fixedly connected to a detection camera 55, the side of the buffer 2 close to the sliding sleeve 41 is fixedly connected to a constant temperature protection sleeve 51, the inner wall of the constant temperature protection sleeve 51 is provided with a thread groove 52, and the slider 53 is slidably connected in the thread groove 52;

[0048] The number of turns of the thread groove 52 is set to one turn;

[0049] The number of turns of the thread groove 52 can reduce the rotation speed of the rotating ring 54 and ensure that the detection camera 55 can fully rotate around the crushing tube body 44.

[0050] The effects achieved by this embodiment are as follows: In the prior art, the coupling buffer device is a device that is prone to wear and failure during the operation of the train, so it requires maintenance personnel to frequently inspect and maintain it. At the same time, when an accident occurs, it also takes a lot of time to investigate the cause of the accident, which increases the workload of train maintenance personnel and reduces their work efficiency. Compared with the prior art, through the implementation of this embodiment, a multi-angle monitoring mechanism 5 is set to enable the constant temperature protection cover 51 to remain stationary when the crush tube body 44 and the sliding sleeve 41 are telescopically moving, and the slider 53 can continuously slide along the thread track of the thread groove 52, thereby driving the swivel 54 to rotate in the reverse direction, and finally driving the detection camera 55 to maintain the detection state and rotate around the crush tube body 44 to perform multi-angle and all-round detection. Once the crush tube body 44 is found to be cracked or easily breakable, an alarm can be issued in time for maintenance, saving troubleshooting time.

[0051] The complete usage steps and working principle of the above embodiment are as follows:

[0052] In the initial state: the crushing tube body 44 and the sliding sleeve 41 are in a stretched state away from each other, the memory metal rod 415 is in a contracted state at room temperature, the ball plug 411 is in sealing contact with the oil outlet pipe 48, and the return spring 412 is in a naturally relaxed state.

[0053] Main technical support: Memory metal is a common type of nickel-titanium alloy, which will undergo phase change at a specific temperature, that is, contraction or expansion. The phase change temperature range of nickel-titanium alloy is usually between minus fifty degrees Celsius and one hundred degrees Celsius. The specific temperature depends on the composition and manufacturing process of the alloy. If the phase change temperature is zero degrees, the alloy will contract at temperatures below zero degrees, and the alloy will expand at temperatures above zero degrees.

[0054] When in use, during the operation of the rail train, the hook buffer device between the carriages will be subjected to the effect of traction and braking force. The two carriages are connected to each other through the connecting member 3. During traction and braking, the buffer member 2 absorbs energy elastically, and cooperates with the sliding friction between the crushing tube body 44 and the sliding sleeve 41 to absorb energy through plastic deformation. When the crushing tube body 44 and the sliding sleeve 41 are reciprocatedly compressed and stretched, heat is generated between the two due to friction. At this time, the heat is collected and concentrated by the heat conducting sheet 43 and directed to the heat collecting block 46. The flat surface of the heat collecting block 46 The top cone-shaped setting can better transfer heat to the internal memory metal rod 415. The memory metal rod 415 expands after being heated, and can push the top telescopic rod 414 upward. When the telescopic rod 414 moves upward, it drives the pull rod 413 to rotate and move upward a certain distance with the telescopic rod 414. At this time, the ball plug 411 abutting against the inner wall of the oil outlet pipe 48 also moves away from the oil outlet pipe 48 with the pull rod 413 and compresses the return spring 412. The lubricating oil in the oil storage tank 42 is partially discharged under the action of gravity. The oil flows through the gap between the oil guide hopper 47 and the ball plug 411 to the oil outlet pipe 48, and the other part flows quickly through the circular holes 416 on both sides of the oil guide hopper 47 to the oil outlet pipe 48, so that the inner wall of the annular oil distributor 49 is quickly filled with lubricating oil, and then discharged from the equally distributed oil outlets 410. The lubricating oil evenly enters the inner wall of the sliding sleeve 41, and the sliding sleeve 41 continuously slides and sleeves on the outer wall of the crushing tube body 44, so that the outer wall of the crushing tube body 44 can be evenly coated with lubricating oil, so that the ball plug is controlled by temperature rise. 411 opens the oil outlet pipe 48 to let in lubricating oil, and cooperates with the sliding sleeve 41 to automatically apply the oil, which can effectively reduce the friction between the crushing pipe body 44 and the sliding sleeve 41, and reduce the friction loss of the crushing pipe body 44, so as to increase its service life. When the train runs smoothly or stops, the friction heat between the crushing pipe body 44 and the sliding sleeve 41 is reduced, and the memory metal rod 415 will return to the initial state. The ball plug 411 is also reset under the elastic force of the oil guide hopper 47, closing the opening of the oil outlet pipe 48 to prevent the leakage of the lubricating oil in the oil storage tank 42;

[0055] Please refer to the above working process Figure 1 , Figure 2 , Figures 4 to 7 .

[0056] Furthermore, through the protection and heat preservation of the constant temperature protective sleeve 51, on the one hand, the impact force of the crushing tube body 44 is dispersed, and the stability of the crushing tube body 44 is enhanced. On the other hand, the constant temperature performance between the crushing tube body 44 and the sliding sleeve 41 is improved, so that the memory metal rod 415 is less affected by the external temperature, and the accuracy of the timing of adding lubricating oil is increased. At the same time, when the crushing tube body 44 and the sliding sleeve 41 move telescopically, the sliding sleeve 41 drives the rotating ring 54 and the slider 53 to move back and forth laterally. Since the constant temperature protective sleeve 51 remains stationary, the slider 53 can continuously slide along the thread track of the thread groove 52, thereby driving the rotating ring 54 and the sliding sleeve 41 in the reverse direction. The ring 54 rotates continuously on the outer wall of the sliding sleeve 41, so that the detection camera 55 located on the top side wall of the rotating ring 54 also rotates accordingly. Since the number of turns of the thread groove 52 is set to one turn, the rotation speed of the rotating ring 54 can be controlled and will not be too fast. In addition, the detection camera 55 is set in the direction of the crushed pipe body 44, so that the detection camera 55 keeps the detection state and rotates around the crushed pipe body 44 to perform multi-angle and all-round detection. Once cracks or other breakable conditions appear on the surface of the crushed pipe body 44, the detection camera 55 can be used to promptly feedback to the external control system to issue an alarm, so that maintenance can be carried out in time, saving troubleshooting time.

[0057] Please refer to the above working process Figures 1 to 3 .

[0058] The circuits and controls involved in the present invention are all prior art and will not be described in detail here.

[0059] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A traction device for urban rail trains for recycling braking energy, comprising a mounting hanger (1), a buffer (2) being rotatably connected to the middle of the mounting hanger (1), a connecting hanger (3) being installed on the buffer (2) in a direction away from the mounting hanger (1), characterized in that: Also included are: An automatic lubrication mechanism (4) for automatically releasing lubricating oil according to the friction temperature to reduce friction loss; The multi-angle monitoring mechanism (5) is used to detect wear parts at multiple angles during train traction and braking.

2. The urban rail train traction device for recycling braking energy according to claim 1, characterized in that: The automatic lubrication mechanism (4) comprises a sliding sleeve (41) rotatably connected to the middle part of the connecting member (3); the inner wall of the sliding sleeve (41) is slidably connected to a crushing tube body (44); the side of the crushing tube body (44) away from the sliding sleeve (41) is slidably connected to the inner wall of the buffer member (2); the top of the sliding sleeve (41) is fixedly connected to a heat conducting plate (43); the top of the heat conducting plate (43) is fixedly connected to a heat collecting block (46); the outer wall of the heat collecting block (46) is fixedly connected to an oil storage tank (42); the four corners of the bottom of the oil storage tank (42) are fixedly connected to the sliding sleeve (41); and the top edge of the oil storage tank (42) is provided with an oil inlet (45).

3. The urban rail train traction device for recycling braking energy according to claim 2, characterized in that: The automatic lubrication mechanism (4) also includes a telescopic rod (414) slidably connected to the top of the heat collecting block (46), a slide groove is opened in the middle of the heat collecting block (46), a memory metal rod (415) is fixedly connected to the bottom of the heat collecting block (46), the outer wall of the memory metal rod (415) is located in the slide groove, the top of the memory metal rod (415) is fixedly connected to the telescopic rod (414), the top of the telescopic rod (414) is rotatably connected to a pull rod (413), and the side of the pull rod (413) away from the telescopic rod (414) is fixedly connected to a ball plug (411).

4. The urban rail train traction device for recycling braking energy according to claim 3 is characterized in that: The automatic lubrication mechanism (4) further comprises an oil outlet pipe (48) fixedly passing through the bottom of the oil storage tank (42); the top of the oil outlet pipe (48) is fixedly connected to an oil guide hopper (47); a side of the oil guide hopper (47) close to the oil outlet pipe (48) is provided with a pair of circular holes (416); a side of the oil guide hopper (47) away from the oil outlet pipe (48) is fixedly connected to a return spring (412); one end of the return spring (412) close to the oil outlet pipe (48) is fixedly connected to the outer wall of the ball plug (411); the ball plug (411) is slidably connected to the inner wall of the oil guide hopper (47); a side of the ball plug (411) away from the return spring (412) is clamped to the inner wall of the oil outlet pipe (48).

5. The urban rail train traction device for recycling braking energy according to claim 4, characterized in that: The automatic lubrication mechanism (4) further comprises an oil separator (49) fixedly connected to the bottom of the oil outlet pipe (48); the bottom of the oil outlet pipe (48) penetrates the outer wall of the heat conducting plate (43) and extends to the inner wall of the sliding sleeve (41); the outer wall of the oil separator (49) is fixedly connected to the inner wall of the sliding sleeve (41); a plurality of oil outlets (410) are equidistantly provided on the inner side of the oil separator (49); the plurality of oil outlets (410) are all connected to the interior of the sliding sleeve (41).

6. The urban rail train traction device for recycling braking energy according to claim 2, characterized in that: The multi-angle monitoring mechanism (5) comprises a rotating ring (54) rotatably connected to the outer wall of the sliding sleeve (41); the rotating ring (54) is located on the side of the sliding sleeve (41) close to the buffer (2); a sliding block (53) is fixedly connected to the outer wall of the rotating ring (54) away from the sliding sleeve (41); a detection camera (55) is fixedly connected to the top side wall of the rotating ring (54); a constant temperature protective sleeve (51) is fixedly connected to the side of the buffer (2) close to the sliding sleeve (41); a threaded groove (52) is provided on the inner wall of the constant temperature protective sleeve (51); and the sliding block (53) is slidably connected in the threaded groove (52).

7. The urban rail train traction device for recycling braking energy according to claim 6, characterized in that: The number of turns of the thread groove (52) is set to one turn.

8. The urban rail train traction device for recycling braking energy according to claim 4, characterized in that: The oil guide hopper (47) is arranged in a funnel shape.

9. The urban rail train traction device for recycling braking energy according to claim 2, characterized in that: The heat collecting block (46) is arranged in a flat-topped cone shape.

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