Automatic oiling device for contact line

Abstract

The invention discloses a contact line automatic oiling device which comprises a walking mechanism, an oil cylinder and an oiling nozzle, and a pressure applying mechanism is arranged on the oil cylinder. The oil injection nozzle is of a detachable structure and can be installed and used at any time, so that oil injection operation on the whole contact line or the middle section can be achieved, the sealing rubber ring is installed in the oil injection nozzle and can be used for scraping redundant conductive grease on the surface of the contact line, and grease waste is reduced. During oil injection, the contact line is installed in the oil injection nozzle, the walking mechanism is installed on a busbar of the rigid contact network, automatic oil injection operation on the contact line can be achieved, the working efficiency is improved, and in the oil injection process, a spring and a pressure adjusting rod in the pressure applying mechanism can be used for applying pressure to conductive grease in the oil cylinder, so that the oil injection efficiency is improved. The electric conduction grease is pushed into the grease injection nozzle, it is ensured that the electric conduction grease is continuously and evenly output, the electric conduction grease can be fully filled into a wire groove of a contact wire, even coating of the electric conduction grease is achieved, and the grease coating quality is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of rail transit contact line maintenance, and in particular to an automatic contact line oiling device. Background Art

[0002] The rigid catenary is a crucial component of urban rail power supply systems. It clamps the contact wires to the busbars, allowing electric trains to draw current through direct contact with the contact wires via the pantographs. Due to the lack of elasticity in rigid suspension, the pantograph-catenary pressure required to offset the pantograph's lifting force is greater than with flexible suspension, exacerbating mechanical friction between the pantograph and the contact wire. This leads to significant wear of the contact wires over time. Furthermore, adverse factors such as hard spots on the contact wire and track gradient changes inevitably lead to abnormal wear in some anchor sections, particularly in areas with severe pantograph-catenary resonance. This significantly reduces the lifespan of the rigid contact wires. As operating time increases, the frequency of contact wire replacement increases.

[0003] During contact line replacement, the contact line trough needs to be fixed to the busbar for installation. Currently, contact lines are typically made of a copper-silver alloy, while the busbar is made of an aluminum alloy. The contact quality between the contact line and the busbar directly affects the conductive performance of the contact network. Therefore, when installing new or replacing contact lines, conductive grease must be evenly applied to the contact line trough to reduce the risk of electrical corrosion at the copper-aluminum transition point.

[0004] In traditional construction operations, the entire oiling process relies entirely on manual labor, typically performed by two people, followed by three to five people wiping the contact wire surface with a rag to remove excess grease. This application method is inefficient and labor-intensive, not only consuming significant human resources but also resulting in a double waste of both rags and conductive grease. Furthermore, workers can be easily scratched by the contact wire during application, posing a safety hazard. Furthermore, manual application is difficult to evenly distribute the conductive grease throughout the contact wire trough, resulting in inconsistent application quality and easily leading to drawbacks such as poor conductivity and contact wire derailment. To improve efficiency and safety, modern industry has gradually introduced automated equipment and technologies to replace traditional manual application methods. For example, Chinese patent CN202110001237.1 discloses a subway rigid contact wire lubricating device. During lubrication, a new conductor is unwound from a reel and inserted into the lubricating device's grease barrel. The new conductor is then passed through a pay-off trolley to connect to the busbar. The pay-off trolley inserts the contact wire into the busbar and the wire begins to be paid out. During the pay-off process, the conductive paste in the contact wire lubricating device automatically flows into the contact wire's wire trough, achieving automatic lubrication. However, the grease barrel in this lubricating device is an integrated structure. When assembled with the contact wire, it can only be installed from the end of the contact wire, making the lubricating device only suitable for lubricating new wires during installation. When lubricating the contact wire in the middle section, the lubricating device is unusable. Moreover, if a problem occurs during lubrication, the grease barrel cannot be removed in time to troubleshoot the problem. Furthermore, when installing this type of lubricating device, the wire surface direction must be determined before the contact wire is inserted into the grease barrel. During threading, care must be taken to prevent the wire surface from twisting, making the operation more cumbersome. Summary of the Invention

[0005] The present application provides an automated contact line oiling device designed to overcome the aforementioned problems existing in the prior art. The device comprises a travel mechanism, an oil cylinder, and an oiling nozzle, with a pressure mechanism mounted on the oil cylinder. The oiling nozzle is detachable and can be installed and used at any time, enabling oiling of the entire contact line or a middle section. A sealing rubber ring is also installed inside the oiling nozzle to scrape off excess conductive grease from the contact line surface, reducing grease waste. During use, the contact line is installed in the oiling nozzle and the travel mechanism is mounted on a busbar of the rigid contact network. This allows automated oiling of the contact line, improving operational efficiency, reducing operator workload, and lowering operational risks. During the oiling process, the spring and pressure adjustment rod in the pressure mechanism apply pressure to the conductive grease in the oil cylinder, pushing the grease into the oiling nozzle, ensuring continuous and uniform grease delivery. This allows the conductive grease to fully fill the contact line's wire slot, achieving uniform coating and improving oiling quality.

[0006] The technical solution of this application is:

[0007] The contact line automatic oil filling device includes a walking mechanism, an oil cylinder and an oil filling nozzle; the walking mechanism includes a frame, and walking wheels arranged on both sides of the upper end of the frame and guide wheels arranged at both ends of the frame; when working, the walking wheels are located in the slide grooves on the sides of the bus, and the guide wheels are located in the grooves at the bottom of the bus; the oil cylinder is installed on the frame, and a pressure mechanism is provided on the oil cylinder; the pressure mechanism includes a pressure plate, an oil push rod, an A spring and a pressure regulating rod; the pressure plate is arranged inside the oil cylinder; one end of the oil push rod is connected to the pressure plate, and the other end is connected to the pressure plate. The oil pump extends out from the inside of the oil cylinder; the A spring is sleeved on the oil push rod, and the two ends of the A spring are respectively connected to the pressure plate and the pressure regulating rod; the pressure regulating rod is sleeved outside the oil push rod and is connected to the oil cylinder through a thread; the oil push rod can move relative to the pressure regulating rod; the oil filling nozzle is composed of a detachable A half shell and a B half shell, and an oil chamber is provided inside the oil filling nozzle, and sealing rubber rings are provided at both ends of the oil chamber; the oil filling port of the oil filling nozzle is connected to the oil outlet of the oil cylinder; when filling oil, the contact line is located in the oil chamber, and the two ends pass through the sealing rubber ring.

[0008] Compared with the prior art, the contact line automatic oiling device of the present application has the following advantages:

[0009] (1) When in use, the contact wire is installed in the oiling nozzle, and the walking mechanism is installed on the busbar of the rigid contact network. The conductive grease in the oil cylinder will automatically flow into the oiling nozzle, thereby realizing the automatic oiling operation of the contact wire, improving the working efficiency and reducing the labor cost; the operator only needs to monitor the operating status of the equipment and does not need to directly touch the contact wire, and the working intensity is low;

[0010] (2) The oil cylinder is provided with a pressure mechanism, including a pressure plate, an oil push rod, a spring and a pressure regulating rod, wherein the spring and the pressure plate cooperate to apply pressure to the conductive grease; during the oil filling process, the pressure regulating rod can be adjusted to squeeze the spring so that the conductive grease in the oil cylinder is subjected to a balanced pressure, thereby ensuring that the conductive grease is continuously and evenly output, so that the conductive grease can be fully filled into the wire groove of the contact wire, achieving uniform coating of the contact wire and good oiling quality;

[0011] (3) The oiling nozzle is a detachable structure that can be disassembled and installed at any time, so that the oiling operation of the entire contact line or the middle section can be realized. In addition, a sealing rubber ring is installed inside the oiling nozzle, which fits tightly with the contact line during oiling and can be used to scrape off excess conductive grease on the surface of the contact line, saving the amount of conductive grease and reducing the waste of resources;

[0012] (4) The traveling mechanism includes traveling wheels and guide wheels, which can be used to guide the movement trajectory and direction of the device to prevent it from deviating, thereby ensuring that the device moves smoothly along the busbar during the oil filling process.

[0013] As an optimization, in the aforementioned contact line automatic oiling device, one side of the A half shell is hinged to the B half shell, and a locking rod is provided on the other side for rotation; the B half shell is provided with a slot that cooperates with the locking rod. The A and B half shells adopt the above-mentioned connection structure, which can achieve fast and convenient opening and closing operations, and is more convenient when assembled with the contact line. Furthermore, both ends of the A half shell and the B half shell are provided with an arc groove for installing the sealing rubber ring. The arc groove is designed to fix the sealing rubber ring to prevent it from moving, making it easier to insert the contact line into the sealing rubber ring during installation.

[0014] As an optimization, in the aforementioned contact line automatic oil filling device, the oil cylinder includes a cylinder body and an end cover. Therefore, when the oil cylinder needs to be refueled, the end cover can be removed, and then the conductive grease can be poured into the cylinder body, and then the end cover can be covered, which is more convenient to operate. On the cylinder body, an exhaust valve is provided at a position close to the end cover, which is used to discharge internal gas during oil filling to maintain the pressure balance in the cylinder body. Furthermore, a limiter is provided on the outside of the pressure regulating rod on the outside of the oil push rod; the limiter includes a limit ring sleeved on the outside of the oil push rod, and a limit knob connected to the limit ring by a thread. Therefore, when installing the end cover, the oil push rod can be fixed by the limiter to prevent the pressure plate from moving and affecting the assembly of the end cover.

[0015] As an optimization, in the aforementioned automated contact wire oiling device, the oiling nozzle has an oiling pipe at the oiling port, and the oil outlet of the oil cylinder has an oil outlet pipe; the oil outlet pipe and the oiling pipe are fixed together by a threaded connection. In this case, the oiling nozzle and the oil cylinder are detachably connected, and oiling nozzles of different apertures can be replaced during use to accommodate contact wires of various diameters, thereby improving the versatility of the oiling device of this application.

[0016] As an optimization, in the aforementioned automated contact line oiling device, cavities for accommodating spring A are provided between the oil push rod and the pressure-adjusting rod, and between the oil push rod and the pressure plate, respectively. In this case, both ends of the spring are restrained by the pressure plate and the pressure-adjusting rod. When the spring is disconnected from the pressure plate or pressure-adjusting rod during use, its ends are less likely to deflect when squeezed, thereby preventing the spring from exerting pressure on the pressure plate.

[0017] As an optimization, in the aforementioned automated contact line oiling device, the frame comprises two opposing side panels and a set of connecting rods disposed between the side panels; the guide wheels are mounted on the connecting rods. This provides a simple structure and facilitates manufacturing. Furthermore, a stop plate is provided on the top of the side panel; the running wheel is mounted on the inner side of the stop plate. During oiling, the stop plate engages with the edge of the busbar to provide a stop.

[0018] Furthermore, a limiting sleeve is provided on the outside of the limiting plate; a limiting rod is slidably provided inside the limiting sleeve; the limiting rod passes through the limiting sleeve and the limiting plate and is rotatably connected to the travel wheel; a B spring is connected between the head of the limiting rod and the limiting sleeve; the B spring is sleeved outside the limiting rod; a limiting pin is provided on the limiting rod, and correspondingly, a limiting groove that cooperates with the limiting pin is provided on the limiting sleeve. At this time, the travel wheel can be installed in the sliding groove on the side of the busbar or removed from the busbar by adjusting the position of the limiting pin in the limiting groove; compared with the traditional bolt structure, the disassembly and assembly process of this design is simpler and faster, and can easily achieve rapid disassembly and assembly of the oil injection device. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 Schematic diagram of the structure of the contact line automatic oiling device in the embodiment of the present application;

[0020] Figure 2 Schematic diagram of the structure of the walking mechanism in the embodiment of the present application;

[0021] Figure 3 Schematic diagram of the assembly of the pressure mechanism, oiling nozzle and oil cylinder in the embodiment of the present application;

[0022] Figure 4 yes Figure 3 A cross-section of the assembly;

[0023] Figure 5 Schematic diagram of the structure of half shell B in the embodiment of the present application;

[0024] Figure 6 is a schematic structural diagram of a rack in an embodiment of the present application;

[0025] Figure 7 Schematic diagram of the assembly of the oiling nozzle and the contact line in the embodiment of the present application;

[0026] Figure 8 It is a schematic diagram of the assembly of the oil filling device and the busbar of the present application during oil filling.

[0027] The markings in the accompanying drawings are: 1-travel mechanism, 11-frame, 111-side plate, 112-connecting rod, 113-limiting plate, 114-connecting plate, 12-travel wheel, 13-guide wheel, 14-limiting sleeve, 141-limiting groove, 15-limiting rod, 151-limiting pin, 16-B spring; 2-oil cylinder, 21-cylinder body, 22-end cover, 23-exhaust valve, 24-oil outlet pipe; 3-oil filling Nozzle, 301-oil chamber, 302-arc groove, 303-card slot, 31-A half shell, 32-B half shell, 33-sealing rubber ring, 34-locking rod, 35-oil filling pipe; 4-pressure mechanism, 401-cavity, 41-pressure plate, 42-oil pushing rod, 43-A spring, 44-pressure adjusting rod, 45-limiting ring, 46-limiting knob; 5-bus; 6-contact wire; 7-line-paying trolley. DETAILED DESCRIPTION

[0028] The present invention will be further described below with reference to the accompanying drawings and examples; any details not described in detail in the following examples are common technical knowledge in the art.

[0029] In view of the problems of the contact wire oiling equipment currently on the market, such as difficulty in threading, inability to disassemble in the middle, and only being able to be installed from the end of the contact wire, the applicant has developed an automatic contact wire oiling device for the oiling of the entire rigid contact wire or the middle section. Figure 1 The contact wire automated oiling device of the present application comprises a travel mechanism 1, a cylinder 2, and an oiling nozzle 3; the cylinder 2 is provided with a pressure mechanism 4. During use, the contact wire is passed through the oiling nozzle 3, and the travel mechanism 1 is mounted on a busbar, thereby achieving automated oiling of the contact wire. During the oiling process, the pressure mechanism 4 applies pressure to the conductive grease in the cylinder 2, pushing the conductive grease into the oiling nozzle 3, ensuring continuous and uniform discharge of the conductive grease, thereby fully filling the contact wire slot and achieving uniform coating of the conductive grease.

[0030] Example:

[0031] See also Figure 2 and Figure 6In this embodiment, the walking mechanism 1 includes a frame 11, walking wheels 12 provided on both sides of the upper end of the frame 11, and guide wheels 13 provided at both ends of the interior of the frame 11; the frame 11 includes two side panels 111 arranged opposite to each other, and four connecting rods 112 spaced apart between the two side panels 111; wherein, two guide wheels 13 are spaced apart on each of the two connecting rods 112 located on the upper side (the guide wheels 13 are rotatably connected to the connecting rods 112); the side panels A limit plate 113 is provided on the top of 111; the limit plate 113 is fixedly connected to the side plate 111 through a connecting plate 114; the connecting plate 114 and the limit plate 113 are both L-shaped; two running wheels 12 are provided at intervals on the inner side of the limit plate 112; when oil is injected, the running wheel 12 is located in the slide groove on the side of the bus 5, and the guide wheel 13 is located in the groove at the bottom of the bus 5; the limit plate 113 cooperates with the edge of the bus 5 to form a limit.

[0032] See also Figure 3 and Figure 4 In this embodiment, the pressure mechanism 4 includes a pressure plate 41, an oil pushing rod 42, an A spring 43 and a pressure adjusting rod 44; the pressure plate 41 is arranged inside the oil cylinder 2; one end of the oil pushing rod 42 is connected to the pressure plate 41, and the other end passes through the inside of the oil cylinder 2; the A spring 43 is sleeved on the oil pushing rod 42, and the two ends of the A spring 43 are respectively connected to the pressure plate 41 and the pressure adjusting rod 44; the pressure adjusting rod 44 is sleeved outside the oil pushing rod 42 and is connected to the oil cylinder 2 by a thread; the oil pushing rod 42 can move relative to the pressure adjusting rod 44; the oil cylinder 2 is fixed between the two side plates 111.

[0033] In this embodiment, the oiling nozzle 3 is composed of a detachably connected half shell A 31 and a half shell B 32, and an oil chamber 301 is provided inside the oiling nozzle 3. Sealing rubber rings 33 are provided at both ends of the oil chamber 301 (the sealing rubber ring 33 also consists of two half rings). The oil filling port of the oiling nozzle 3 is connected to the oil outlet of the oil cylinder 2. Figure 7 When oil is injected, the contact line 6 is located in the oil chamber 301 , and both ends pass through the sealing rubber ring 33 .

[0034] In this embodiment, one side of the A half shell 31 is hinged to the B half shell 32, and the other side is provided with a locking rod 34 for rotation; the B half shell 32 is provided with a slot 303 that cooperates with the locking rod 34. At this time, the A half shell 31 and the B half shell 32 can be opened and closed by adjusting the connection between the locking rod 34 and the slot 303, so that the oiling nozzle 3 can be quickly and conveniently installed on or removed from the contact line 6. Figure 5Furthermore, both ends of the A and B half-shells 31 and 32 are provided with arcuate grooves 302 for mounting the sealing rubber ring 33. The arcuate grooves 302 are designed to secure the sealing rubber ring 33 and prevent it from moving, facilitating the insertion of the contact wire 6 into the sealing rubber ring 33 during installation and facilitating subsequent maintenance and replacement of the sealing rubber ring 33. The sealing rubber ring 33 is made of a wear-resistant and corrosion-resistant material.

[0035] In this embodiment, the oil cylinder 2 includes a cylinder body 21 and an end cover 22; the pressure regulating rod 44 is connected to the end cover 22 by threads; a limiter is provided on the outer side of the pressure regulating rod 44 on the oil pushing rod 42; the limiter includes a limit ring 45 sleeved on the outside of the oil pushing rod, and a limit knob 46 connected to the limit ring 45 by threads. When assembling the oil cylinder 2, first install the various components of the pressure mechanism 4 together with the end cover 22, and pour conductive grease into the cylinder body 21; then, rotate the limit knob 46 to fix the oil pushing rod 42; finally, screw the end cover 22 onto the cylinder body 21, and the assembly of the oil cylinder 2 is completed; when oil needs to be filled, loosen the limit knob 46. On the cylinder body 21, near the end cover 22, an exhaust valve 23 is provided, which is used to discharge the gas inside the cylinder body 21 when filling oil to maintain the pressure balance inside the cylinder body 21. In this embodiment, the oil stored in the oil cylinder 2 is sufficient to replace more than 500 meters of contact wire at one time, and can complete the replacement of the contact wire of the entire anchor section. No additional conductive grease needs to be added during the operation, thereby saving refueling time and further improving work efficiency.

[0036] In this embodiment, the oiling port of the oiling nozzle 3 is provided with an oiling pipe 35, and the oil outlet of the oil cylinder 2 is provided with an oil outlet pipe 24. The oil outlet pipe 24 and the oiling pipe 35 are fixedly connected by threads. In this case, the oiling nozzle 3 and the oil cylinder 2 are detachably connected, and the oiling nozzle 3 can be replaced with an oiling nozzle 3 of different diameters during use to accommodate contact wires 6 of various diameters, thereby improving the versatility of the oiling device of this application.

[0037] In this embodiment, cavities 401 for accommodating spring A 43 are defined between the oil push rod 42 and the pressure adjustment rod 44, and between the oil push rod 42 and the pressure plate 41. Both ends of spring A 43 are restrained by the pressure plate 41 and the pressure adjustment rod 44. When spring A 43 is disconnected from the pressure plate 41 or the pressure adjustment rod 44 during use, its ends are not easily displaced by compression, thereby preventing the pressure exerted by spring A 43 on the pressure plate 41.

[0038] In this embodiment, a limiting sleeve 14 is provided on the outer side of the limiting plate 113; a limiting rod 15 is slidably provided inside the limiting sleeve 14; the limiting rod 15 passes through the limiting sleeve 14 and the limiting plate 113, and is rotatably connected to the walking wheel 12; a B spring 16 is connected between the head of the limiting rod 15 and the limiting sleeve 14; the B spring 16 is sleeved on the outside of the limiting rod 15; a limiting pin 151 is provided on the limiting rod 15, and correspondingly, a limiting groove 141 is provided on the limiting sleeve 14 to cooperate with the limiting pin 151. Therefore, the travel wheel 12 can be installed in the slide groove on the side of the bus 5, or the travel wheel 12 can be removed from the bus 6 by adjusting the position of the limit pin 151 in the limit groove 141 (first press the limit rod 15 inward, and then rotate the limit rod 15 to change the position of the limit pin 151 in the limit groove 141); compared with the traditional bolt structure, the disassembly and assembly process of this design is simpler and faster, and can easily realize the rapid disassembly and assembly of the oil injection device.

[0039] In this embodiment, the frame 11 is made of aluminum alloy and has a special surface treatment to ensure the durability of the oil injection device. The design of the frame 11 needs to take into account the size and shape of the rigid contact network bus 5 to ensure that the device can remain stable during operation.

[0040] When a new line is erected, the contact line automatic oiling device of the present application is used to oil the contact line, which specifically includes the following steps:

[0041] S1. Pay out the new contact wire 6 from the reel and clamp the oiling nozzle 3 outside the contact wire 6; the head of the contact wire 6 passes through the pay-out trolley 7 and docks with the busbar 5; the pay-out trolley 7 is installed on the busbar 5 and connected to the engineering vehicle via a traction rope;

[0042] S2. Install the traveling mechanism 1 onto the busbar 5, on the forward side of the pay-off trolley 7, and connect the traveling mechanism 1 and the pay-off trolley 7 together via a connecting rod (not shown). At this time, the conductive grease in the oil cylinder 2 will flow from the oil outlet into the oil chamber 301 in the oiling nozzle 3, filling the oil chamber 301 completely. This will completely immerse the contact wire 6 in the oiling nozzle 3 in the conductive grease, and further ensure that the conductive grease can fully fill the wire groove of the contact wire 6.

[0043] S21, the specific installation process of the walking mechanism 1 is as follows: the walking wheels 12 on both sides of the frame 11 are placed in the slide grooves on both sides of the bus 5, the limit plates 113 are in contact with the edges of the bus 5, the guide wheels 13 are placed in the grooves on both sides of the bottom of the bus 5, and then the limit rods 14 are adjusted so that the limit pins 141 are locked in the slots 151, and the installation is completed (see Figure 8 );

[0044] S3. The engineering vehicle moves, driving the pay-off trolley 7 to move along the busbar 5. As the pay-off trolley 7 moves, it pushes the contact wire 6 into the busbar 5 and simultaneously pushes the traveling mechanism 1 forward along the busbar 5, thereby automatically oiling the contact wire 6. (As the traveling mechanism 1 moves, the contact wire 6 continuously passes through the oil chamber 301 to achieve oiling. Excess grease on the surface of the contact wire 6 is scraped away by the sealing rubber ring 33 as it passes through the sealing rubber ring 33.)

[0045] S4. After a certain length of the contact wire 6 is filled with oil (200 meters in this embodiment; this length is determined by the operator based on previous experience), the operator rotates the pressure adjustment rod 44 to squeeze the A spring 43. The A spring 43 applies pressure to the pressure plate 41, causing the pressure plate 41 to move inward, applying pressure to the conductive grease, thereby ensuring continuous and uniform output of the conductive grease.

[0046] During maintenance, the contact line automatic oiling device of the present application is used to oil the middle section of the contact line, which specifically includes the following steps:

[0047] S1. Remove the entire section of contact wire 6 that needs to be oiled from the busbar 5 and clamp the oiling nozzle 3 outside the contact wire 6. At the same time, install the wire-paying trolley 7 on the busbar 5 and connect the wire-paying trolley 7 to the engineering vehicle via a traction rope.

[0048] Steps S2 to S4 are the same as the oiling steps when a new line is installed.

[0049] The above general description of the invention and the description of its specific embodiments involved in this application should not be construed as limiting the technical solutions of the invention. Based on the disclosure of this application, those skilled in the art may, without violating the constituent elements of the invention involved, add to, subtract from, or combine the disclosed technical features in the above general description and / or specific embodiments (including examples) to form other technical solutions within the scope of protection of this application.

Claims

1. The contact line automatic oiling device is characterized by: It comprises a walking mechanism (1), an oil cylinder (2) and an oil injection nozzle (3); The walking mechanism (1) comprises a frame (11), walking wheels (12) arranged at both sides of the upper end of the frame (11), and guide wheels (13) arranged at both ends of the inside of the frame (11); when in operation, the walking wheels (12) are located in a slide groove on the side of the bus (5), and the guide wheels (13) are located in a groove at the bottom of the bus (5); The oil cylinder (2) is mounted on a frame (11), and a pressure mechanism (4) is provided on the oil cylinder (2); the pressure mechanism (4) comprises a pressure plate (41), an oil push rod (42), an A spring (43) and a pressure regulating rod (44); the pressure plate (41) is arranged inside the oil cylinder (2); one end of the oil push rod (42) is connected to the pressure plate (41), and the other end passes through the inside of the oil cylinder (2); the A spring (43) is sleeved on the oil push rod (42), and the two ends of the A spring (43) are respectively connected to the pressure plate (41) and the pressure regulating rod (44); the pressure regulating rod (44) is sleeved outside the oil push rod (42), and is connected to the oil cylinder (2) by a thread; the oil push rod (42) can move relative to the pressure regulating rod (44); The oil injection nozzle (3) is composed of a detachably connected A half shell (31) and a B half shell (32), and an oil chamber (301) is provided inside the oil injection nozzle (3), and sealing rubber rings (33) are provided at both ends of the oil chamber (301); the oil injection port of the oil injection nozzle (3) is connected to the oil outlet of the oil cylinder (2); when oil is injected, the contact line (6) is located in the oil chamber (301), and the two ends pass through the sealing rubber ring (33).

2. The contact line automatic oiling device according to claim 1 is characterized in that: One side of the A half shell (31) is hinged to the B half shell (32), and the other side is rotatably provided with a locking rod (34); the B half shell (32) is provided with a slot (303) that matches the locking rod (34).

3. The contact line automatic oiling device according to claim 2 is characterized in that: Both ends of the A half shell (31) and the B half shell (32) are provided with arc-shaped grooves (302) for installing the sealing rubber ring (33).

4. The contact line automatic oiling device according to claim 1 is characterized in that: The oil cylinder (2) comprises a cylinder body (21) and an end cover (22); an exhaust valve (23) is provided on the cylinder body (21) at a position close to the end cover (22).

5. The contact line automatic oiling device according to claim 4 is characterized in that: A limiter is provided on the oil pushing rod (42) and located outside the pressure regulating rod (44); the limiter comprises a limit ring (45) sleeved outside the oil pushing rod (42), and a limit knob (46) connected to the limit ring (45) by a thread.

6. The contact line automatic oiling device according to claim 1 is characterized in that: An oil filling pipe (35) is provided on the oil filling port of the oil filling nozzle (3), and an oil outlet pipe (24) is provided at the oil outlet of the oil cylinder (2); the oil outlet pipe (24) and the oil filling pipe (35) are fixedly connected by threads.

7. The contact line automatic oiling device according to claim 1 is characterized in that: A cavity (401) for accommodating an A spring (43) is provided between the oil pushing rod (42) and the pressure regulating rod (44), and between the oil pushing rod (42) and the pressure plate (41).

8. The contact line automatic oiling device according to claim 1 is characterized in that: The frame (11) comprises two side plates (111) arranged opposite to each other and a group of connecting rods (112) arranged between the two side plates (111); the guide wheel (13) is arranged on the connecting rods (112).

9. The contact line automatic oiling device according to claim 8, characterized in that: A limiting plate (113) is provided on the top of the side plate (111); the travel wheel (12) is mounted on the inner side of the limiting plate (112); when oil is injected, the limiting plate (113) cooperates with the edge of the busbar (5) to form a limit.

10. The contact line automatic oiling device according to claim 9, characterized in that: A limiting sleeve (14) is provided on the outer side of the limiting plate (113); a limiting rod (15) is slidably provided inside the limiting sleeve (14); the limiting rod (15) passes through the limiting sleeve (14) and the limiting plate (113) and is rotatably connected to the walking wheel (12); a B spring (16) is connected between the head of the limiting rod (15) and the limiting sleeve (14); the B spring (16) is sleeved outside the limiting rod (15); a limiting pin (151) is provided on the limiting rod (15), and correspondingly, a limiting groove (141) matching the limiting pin (151) is provided on the limiting sleeve (14).

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