Locomotive draft pin unjamming device

Abstract

The application discloses a locomotive traction pin dredging device, which comprises an oil pump, an oil pipe and a hydraulic conversion head arranged at one end of the oil pipe, the inside of the conversion head is through, and a hexagonal joint body, a hydraulic quick-release joint and a liquid inlet chamber are sequentially arranged in the inside of the conversion head, and a liquid injection interface with an angle of 45°-90° with the hexagonal joint body is arranged on the side wall of the liquid inlet chamber. The device is adapted to the narrow space at the bottom of the locomotive through the inclination design, the blocked oil path is dredged by using high-pressure fluid, and the grease injection function is quickly switched through the quick-release joint. The device is also integrated with the structures of a detachable rotating head, a spring protection ring, a dustproof cap, an observation window, a waste oil collecting cover and a scale removing swing arm, so that the universality, the sealing property, the vibration resistance and the scale removing capacity of the equipment are improved, the maintenance time and the labor intensity are obviously reduced, and efficient dredging and grease injection can be completed without disassembling the traction pin.

Description

Technical Field

[0001] This utility model relates to the field of high-speed rail locomotives, specifically to a locomotive traction pin unblocking device. Background Technology

[0002] Electric locomotives, also known as electric trains, are trains that obtain electrical energy from the power supply overhead contact line or power supply rails and then drive the vehicles through electric motors.

[0003] Electric locomotives have many advantages, and their overall performance is better than that of steam locomotives and diesel locomotives. They are not only widely used in the operation of mainline railways, but also serve almost all urban rail transit systems.

[0004] As a key connecting component of the locomotive, the traction pin ensures the normal transmission of the locomotive's weight, traction force, braking force, and lateral force, the even distribution of axle load, and the stability of the car body on the bogie. It allows the bogie to rotate relative to the car body when entering and exiting curves. Therefore, it is both a load-bearing device and a movable joint.

[0005] Therefore, the lubrication condition of the traction pin is directly related to the safety of the train and the life of the equipment. According to the relevant maintenance process specifications of locomotives, the traction pin must be lubricated regularly during C1 and above maintenance processes. Kluberlub BE 71-501 grease should be added until the grease overflows from the oil filling hole to ensure sufficient lubrication.

[0006] However, as the locomotive ages, the original grease inside the traction pin mixes with dust to form hardened grease, which blocks the grease injection channel, preventing the conventional grease injection gun from injecting new grease.

[0007] Currently, due to the narrow space under the locomotive, routine maintenance is difficult to carry out. When the oil filling channel becomes blocked, the entire drawbar needs to be removed from the bottom of the locomotive and transported to a high-power locomotive maintenance workshop for specialized repairs.

[0008] The maintenance process includes the disassembly and reassembly of the tow bar. The disassembly alone requires 3 people to operate for 1 hour, and the reassembly requires 3 people to spend 2 hours. This does not include the time for auxiliary operations such as crane transportation. If the process of requesting a vehicle for transfer is included, the entire maintenance cycle will be extended by at least two working days, which seriously restricts maintenance efficiency, increases maintenance costs, and has a significant impact on the availability of the locomotive. Utility Model Content

[0009] In order to solve the technical problems of difficulty in grease injection into traction pins and the difficulty in maintenance by conventional means in the existing technology, this application provides a locomotive traction pin unblocking device.

[0010] To achieve the above objectives, the technical solution adopted in this application is as follows: A locomotive traction pin unblocking device includes an oil pump and an oil pipe connected to the oil pump at one end. A hydraulic converter is provided at the other end of the oil pipe. The hydraulic converter has a through-hole and a hexagonal connector body connected to the oil pipe. A hydraulic quick-release connector is connected to the upper part of the hexagonal connector body. The hydraulic quick-release connector is connected to the hexagonal connector body through a pipe joint locking nut. A liquid inlet chamber for transferring lubricating grease is provided above the hydraulic quick-release connector. A liquid injection port is provided on the side wall of the liquid inlet chamber. The relative angle between the liquid injection port and the hexagonal connector body is 45°-90°.

[0011] Furthermore, the outer surface of the front end of the injection port is provided with an umbrella-shaped engaging component that engages with the inner wall of the traction pin. One end of the umbrella-shaped engaging component is fixedly set at the edge of the front end of the injection port, and the other end is provided with a pushing ring that changes the shape of the umbrella-shaped engaging component. The pushing ring is provided with a buckle.

[0012] Furthermore, a detachable rotating head is provided between the injection port and the inlet chamber. The injection port is connected to one end of the detachable rotating head, and the inlet chamber is connected to the other end of the detachable rotating head.

[0013] Furthermore, a spring protective ring is installed on the outer wall of the hexagonal connector body at the connection between the hexagonal connector body and the oil pipe.

[0014] Furthermore, the spacing between the spring coils of the spring protection ring is continuously and gradually distributed along the axial direction, with the front spring coils arranged closely together and the rear spring coils arranged at intervals.

[0015] Furthermore, a dust cap is provided behind the injection port, and the dust cap has a cap ring that connects to the hydraulic converter head. The cap ring is fixed to the outer surface of the hydraulic converter head by an interference fit.

[0016] Furthermore, the inlet chamber has a wrench clamping surface below it for removing the inlet chamber. One end of the wrench clamping surface is connected to a hydraulic quick-release connector, and the other end is sealed to a sealing connector below the inlet chamber.

[0017] Furthermore, a waste oil collection cover for collecting leaked grease is fitted behind the injection port. The waste oil collection cover is an arc-shaped body with a hollow interior. The convex surface of the arc-shaped body has a through hole for the injection port to pass through. A ring-shaped strong magnet for adsorption and fixation is embedded at the edge of the arc-shaped body.

[0018] Furthermore, a transparent, enclosed observation window is provided on the side wall of the liquid inlet chamber for observing the amount of lubricating grease.

[0019] Furthermore, a movable scale removal swing arm is hinged to the side wall of the liquid inlet chamber. The front end of the scale removal swing arm is provided with a spike. The spike extends in a direction parallel to the axis of the liquid injection interface and protrudes from the end face of the liquid injection interface.

[0020] Beneficial effects: This device, through its integrated hydraulic converter design, 45°-90° tilt angle arrangement, and umbrella-shaped locking component design, enhances the adaptability and operability of grease injection operations in the narrow space under the locomotive. It can directly complete oil circuit unblocking and grease injection without disassembling the tow bar, saving maintenance time and labor costs. Its hydraulic quick-release connector enables rapid switching between high-pressure flushing and grease injection functions. The spring protection ring and detachable structure enhance the equipment's vibration resistance, sealing, and component replaceability. The design of the observation window, dust cap, waste oil collection cover, and scale removal swing arm further improves the visibility, cleanliness, and ability to handle stubborn oil stains during the operation. Thus, while ensuring maintenance quality, it reduces the maintenance work that originally required 3 people and 2 days to only 1 person and 10 minutes, greatly shortening the operation time, improving labor efficiency, and making it suitable for large-scale promotion. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the structure of the first embodiment of the present utility model; Figure 2 This is a schematic diagram of the structure of the second embodiment of the present utility model; Figure 3 This is a partially enlarged schematic diagram of the unfolded state of the second embodiment of this utility model; Figure 4 This is a partially enlarged schematic diagram of the retracted state in the second embodiment of this utility model; Figure 5 This is a schematic diagram of the working state of the second embodiment of the present invention; Figure 6 This is a schematic diagram of the structure of the third embodiment of the present utility model; Figure 7 This is a schematic diagram of the waste oil collection hood structure of this utility model; Figure 8 This is a schematic diagram of the descaling swing arm structure of this utility model; Figure 9 This is a flowchart of the existing technology operation process; Figure 10 This is a flowchart illustrating the operation of this utility model. In the diagram: 1-oil pipe; 2-spring protective ring; 3-hexagonal connector body; 4-pipe connector locking nut; 5-hydraulic quick-release connector; 6-wrench clamping surface; 7-liquid inlet chamber; 8-detachable rotating head; 81-liquid injection port; 82-control ring; 821-clasp; 83-umbrella-shaped locking piece; 832-umbrella bag; 832-umbrella tube; 9-dust cap; 91-cap ring; 10-scaling swing arm; 101-rotating shaft; 102-spiked part; 11-waste oil collection cover; 111-ring-shaped strong magnet. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0024] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0025] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0026] In the description of this application, it should be noted that the use of terms such as "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer" to indicate orientation or positional relationships is based on the orientation or positional relationships shown in the accompanying drawings, or the orientation or positional relationships commonly used when the product is in use. These terms are used solely for the convenience of describing this application and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the use of terms such as "first" and "second" in the description of this application is only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0027] Furthermore, the use of terms such as "horizontal" and "vertical" in the description of this application does not imply that the component is required to be absolutely horizontal or suspended, but rather that it may be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but rather that it may be slightly tilted.

[0028] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "set up," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0029] Example 1: like Figure 1 As shown in the figure, the specific structure of the first embodiment of the locomotive traction pin unblocking device of this utility model is disclosed. It includes an oil pump and an oil pipe 1 connected to the oil pump at one end. A hydraulic conversion head is provided at the other end of the oil pipe 1. The hydraulic conversion head has a through-hole and a hexagonal connector body 3 connected to the oil pipe 1. A hydraulic quick-release connector 5 is connected to the upper part of the hexagonal connector body 3. The hydraulic quick-release connector 5 is connected to the hexagonal connector body 3 through a pipe joint locking nut 4. A liquid inlet chamber 7 for transferring lubricating grease is provided above the hydraulic quick-release connector 5. A liquid injection port 81 is provided on the side wall of the liquid inlet chamber 7. The relative angle between the liquid injection port 81 and the hexagonal connector body 3 is 45°-90°.

[0030] Working principle: First, the user aligns the fluid injection port 81 with the oil inlet of the traction pin. The oil pump then starts, generating high-pressure fluid. This fluid is delivered to the hydraulic converter via the oil pipe 1, flowing along an internal through-path. It first enters the hexagonal connector body 3, which is directly connected to the oil pipe 1. The hexagonal connector body 3, with its robust hexagonal design, provides mechanical stability and a sealing connection point, ensuring no leakage under high pressure. The fluid then flows upward to the hydraulic quick-release connector 5, which forms a detachable, secure connection with the hexagonal connector body 3 via the pipe fitting lock nut 4, allowing for quick assembly or maintenance. The fluid continues upward to the inlet chamber 7 above the hydraulic quick-release connector 5. This chamber acts as a transfer hub, guiding the fluid to the fluid injection port 81, which is connected to its side wall at an angle of 45°-90° relative to the hexagonal connector body. The high-pressure fluid is injected into the target location, achieving the core function of unclogging grease or filling it with lubricant.

[0031] Technical effects: This embodiment addresses the challenges of limited working space and complex environments under locomotives, solving the problem of ineffective descaling with traditional maintenance and dredging tools. Based on the inventors' extensive field experiments, this device improves traditional mechanical maintenance by employing a hydraulic descaling method. A specially designed hydraulic adapter is incorporated into the existing hydraulic pump system. Compared to conventional hydraulic punches, this adapter features a specific tilt angle and a quick-release hydraulic connector for easy oil pipe replacement, optimized specifically for the confined working conditions under locomotives.

[0032] In this environment, traditional pneumatic or hydraulic punching devices are not only difficult to operate, but also involve redundant tools, making the subsequent grease injection process extremely inconvenient. This invention, through its unique angled design, allows the operator to simply connect the adapter's grease inlet to the traction pin's grease hole, start the oil pump, and inject high-pressure fluid into the traction pin to thoroughly remove internal grease buildup and achieve smooth unblocking. Subsequently, the operator can quickly switch to the grease reservoir connection state by operating the hydraulic quick-release connector to directly complete the grease injection into the traction pin.

[0033] This structure significantly reduces the space required for operation, simplifies operating equipment, and improves maintenance efficiency and convenience.

[0034] Example 2: See Figure 2 As a preferred embodiment of the present invention, this embodiment is further optimized based on the first embodiment.

[0035] Specifically, in this embodiment, the hydraulic converter has an overall L-shaped structure, consisting of an upper inclined section and a lower vertical section.

[0036] The upper inclined section includes a liquid injection port 81, a liquid inlet chamber 7, and a detachable rotating head 8. The liquid injection port 81 is connected to the liquid inlet chamber 7 through a detachable rotating head 8.

[0037] like Figure 2-5 As shown, the outer surface of the front end of the injection port 81 is provided with an umbrella-shaped locking member 83 that engages with the inner wall of the traction pin. One end of the umbrella-shaped locking member 83 is fixedly set at the front edge of the injection port 81, covering the injection port 81. The other end is equipped with a pushing ring 82 that changes the shape of the umbrella-shaped locking member. The pushing ring 82 is provided with a buckle 821. After the injection port 81 enters the oil injection hole of the traction pin, the buckle 821 is pressed to release the lock on the pushing ring 82 and push it upward, so that the umbrella bladder 831 of the umbrella-shaped locking member 83 unfolds on the inner wall of the traction pin under the support of the first umbrella rib and the second umbrella rib, engaging with the inner wall of the traction pin and preventing grease leakage during high-pressure oil injection.

[0038] The umbrella-shaped locking component 83 is composed of an umbrella pouch 831 and an umbrella tube 832. The umbrella pouch 831 has radial umbrella ribs inside, which are used to unfold and support the umbrella pouch 831. The middle section of the umbrella ribs adopts a folding structure, dividing the umbrella ribs into a first umbrella rib and a second umbrella rib. When closed, the first umbrella rib and the second umbrella rib fit against the outer surface of the liquid injection interface 81. When unfolded, the first umbrella rib and the second umbrella rib are vertically opposed to each other, supporting the unfolding of the umbrella pouch 831.

[0039] Because the traction pin itself has a certain thickness, the umbrella tube 832, which extends to a certain length and is preferably made of a rigid material, is provided behind the umbrella bag 831. The umbrella tube 832 fits the outer surface of the injection port 81. The umbrella tube 832 is used to provide a certain accommodating space for the thickness of the traction pin wall when the injection port 81 is inserted into the injection hole of the traction pin.

[0040] The push ring 82 is a ring-shaped component sleeved on the outer surface of the injection port 81. It is fixed to the injection port 81 by a buckle, which locks the push ring. The push ring 82 is connected to the umbrella tube 832, and a sealing ring may be provided at the connection.

[0041] The liquid injection interface structure, through the cooperation of the umbrella-shaped locking part 83 and the pushing ring 82, allows the umbrella-shaped locking part to expand radially and tightly engage with the inner wall of the traction pin during high-pressure oil injection by releasing the locking and pushing the pushing ring 82 upward, effectively preventing grease leakage. At the same time, the umbrella tube structure accommodates the thickness of the pin wall, ensuring that the sealing ring fits snugly with the pin wall, further improving the sealing reliability. like Figure 6 As shown, in this embodiment, in order to adapt to the grease injection of traction pins of different locomotive models, the umbrella-shaped locking piece 83 originally installed on the outer surface of the injection interface 81 can be changed to a thread that connects to the traction pin oil injection hole, and the injection interface 81 originally directly connected to the liquid inlet chamber 7 can be changed to be connected to the detachable rotating head 8.

[0042] Specifically, the detachable rotating head 8 is an independent connecting component. One end of it is provided with an external thread or quick-connect interface, which is fixedly connected to the internal thread or corresponding female port of the liquid injection interface 81, and the sealing of the connection is ensured by a sealing ring. The other end is also provided with a connecting structure, such as an external thread or a snap-fit, which is not limited here, and is used to connect to the interface preset on the side wall of the liquid inlet chamber 7 to achieve detachable fastening and sealing.

[0043] The detachable rotor 8 is preferably made of high-strength alloy steel to ensure its structural strength and sealing reliability. In some applications with stringent cost requirements and lower operating pressures, engineering plastics with appropriate strength can also be used. The detachable rotor 8 has a through flow channel inside to ensure that the grease can smoothly enter the injection port 81 from the inlet chamber 7. The purpose of this design is to configure the oil injection port 81 as a quick-replaceable independent module. When this component wears out due to long-term use, the user only needs to unscrew or pull out the damaged rotor and replace it with a new rotor to restore all functions.

[0044] In addition, to adapt to the installation requirements under different working conditions, the detachable rotating head 8 can be manufactured into a series of standard parts with different lengths or interface specifications, thereby improving the versatility and adaptability of the entire unblocking device. The injection interface 81 can also be customized according to the actual working conditions on site.

[0045] In addition, as an optional solution, since the environment in the locomotive maintenance environment is relatively complex and dusty, in this embodiment, a dust cap 9 is added behind the injection port 81 to seal the injection port 81 when not performing grease injection operations, so as to prevent foreign objects such as dust and oil from entering the port and causing pollution or blockage.

[0046] The dust cap 9 is made of rubber or silicone material with a certain degree of elasticity and wear resistance, and its main body is a cap-shaped structure. A hat strap of a certain length extends from the edge of the dust cap 9, and a hat ring 91 is connected to one end of the hat strap. The hat ring 91 is used to fix the dust cap 9 to the upper inclined part.

[0047] In this embodiment, the inner ring diameter of the cap ring 91 is designed to be smaller than the outer diameter of the sleeve portion. Through the interference fit design, the cap ring 91 can tightly wrap and clamp onto the outer surface of the liquid inlet chamber 7 by relying on the elastic deformation of the material itself, thereby achieving reliable sealing and fixation, and preventing the dust cap 9 from accidentally falling off due to vibration during equipment operation.

[0048] In this embodiment, an observation window is provided on the side wall of the liquid inlet chamber 7 for real-time monitoring of the grease level within the chamber. This observation window is made of high-strength transparent material and is sealed and fixed to the opening of the chamber wall, forming a sealed and transparent viewing window. An oil-resistant rubber sealing ring is embedded at the edge to prevent grease leakage and ensure it can withstand the system's operating pressure.

[0049] The observation window can be a circular or rectangular sight glass structure, with scale markings or liquid level indicators on its surface for easy observation of grease changes. The observation window is fixed to the wall of the liquid inlet chamber 7 by a pressure ring or threaded connection, and can be used with the aid of an external light source for observation when external lighting conditions are poor.

[0050] The lower vertical part includes a hexagonal connector body 3, a pipe connector locking nut, and a hydraulic quick-release head 5. The upper inclined part and the lower vertical part are at a 90° right angle to each other and are connected to each other through a sealing joint. The outer periphery of the sealing joint is provided with a wrench clamping surface 6. By rotating the wrench clamping surface 6, the upper inclined part can be assembled or disassembled to the lower vertical part to facilitate cleaning of the hydraulic converter head. This avoids the hydraulic converter head from being blocked during operation due to excessive length, which would require replacement and increase the workflow. With this design, if a blockage occurs, the user only needs to use a wrench aligned with the wrench clamping surface 6 to disassemble the upper inclined part to clear the internal fluid flow channel of the hydraulic converter head.

[0051] The lower vertical section structure in this embodiment is basically the same as that in the first embodiment, except that the outer wall of the hexagonal connector 3 that connects the lower vertical section to the liquid flow pipe is fitted with a spring protective ring 2.

[0052] Specifically, the spring protection ring 2 has a hollow cylindrical structure with an inner diameter slightly larger than the outer diameter of the hexagonal connector body 3. It can tightly and stably wrap around the outer wall of the connector body. By setting the spring protection ring 2, the bending and vibration resistance of the connection between the oil pipe and the connector body is effectively enhanced, preventing the connection from loosening or leaking due to external impact or long-term vibration.

[0053] In this embodiment, in order to further improve the vibration resistance, the spring coil spacing of the spring protection ring 2 is continuously and gradually distributed along its axial direction.

[0054] Specifically, the front end 21 of the spring protection ring is located near the oil pipe 1. The spring coils in this part have a small spacing and are closely arranged, providing stronger rigid support and local protection. The rear end 22 is located away from the oil pipe. From the front end to the rear end, the spacing of the spring coils gradually increases. The rear end is sparsely spaced, which has a certain degree of flexibility and buffering performance. This design ensures the stability of the connection while also being able to adapt to a certain range of deflection and vibration, avoiding stress concentration and extending the overall service life.

[0055] Example 3: To achieve better maintenance results, this embodiment is further improved based on the first and second embodiments. The difference between this embodiment and the first and second embodiments is that this embodiment adds a cleaning swing arm 10 for breaking up oil stains and a waste oil collection cover 11.

[0056] like Figure 7 As shown, specifically, the waste oil collection cover is located behind the injection port 81 to collect any grease that may drip before or after the grease injection operation, so as to prevent grease from contaminating other parts of the locomotive or the working environment.

[0057] The waste oil collection cover 11 is an overall hollow arc-shaped shell structure with its concave surface facing the direction of grease injection operation. A through hole is provided on the convex surface of the arc-shaped body, through which the liquid injection port 81 can pass, so that the waste oil collection cover 11 can surround and wrap around the root of the liquid injection port 81.

[0058] A ring-shaped strong magnet 111 is embedded inside the edge of its arc-shaped body. Through the magnetic attraction force generated by the ring-shaped strong magnet 111, the waste oil collection cover 11 can be firmly attracted to the metal substrate near the locomotive traction pin.

[0059] The waste oil collection cover 11 is preferably made of oil-resistant, flexible, transparent plastic or transparent rubber material, which can adapt to uneven installation surfaces to ensure collection effect, and does not hinder the observation of the grease injection status of the injection joint 81.

[0060] In addition, by using the magnetic attraction of the ring-shaped strong magnet 111, the operator can temporarily attach the hydraulic converter to the adjacent metal substrate during work breaks, thus effectively avoiding the problems of inconvenient hand-holding or difficulty in finding the equipment when placed randomly in a work environment with limited space or poor lighting.

[0061] like Figure 8 As shown in the figure, the specific structure of the scale removal swing arm 10 is revealed. The front end of the scale removal swing arm 10 is provided with a spike 102 made of a high-hardness material, and its rear end is movably hinged to the side wall of the liquid inlet chamber 7 through a rotating shaft 101, so that the swing arm can rotate around the hinge point as the center.

[0062] In its non-operating state, the descaling arm 10 can be folded and fitted against the outer surface of the hydraulic converter head to reduce space occupation and avoid interfering with normal operation. When encountering stubborn blockages, the operator can rotate it to the working position. In this position, the extension direction of its spikes 102 is parallel to the axis of the injection port 81. This design aims to limit the maximum penetration depth of the spikes to prevent excessive penetration and damage to the inner wall of the traction pin. For convenient mechanical descaling operations, the operator can also rotate the arm to other angles for cleaning as needed.

[0063] To address stubborn grease buildup that is difficult to remove using hydraulic pressure alone during the grease removal process, when hydraulic grease injection is hampered by stubborn grease, the operator can first manually operate the cleaning arm 10, using its pointed end 102 to pry and puncture the hard grease in front of the injection port 81, thus physically breaking down the grease layer and creating a breakthrough. Once a breakthrough is formed, the hydraulic flushing can be restarted, allowing high-pressure grease to be injected smoothly along the breakthrough, thoroughly removing any remaining grease using hydraulic pressure.

[0064] In addition, if the hydraulic flushing pressure is still insufficient, a booster cylinder can be added to the hexagonal joint body to ensure that the hydraulic oil can clear the traction pin.

[0065] In summary, the overall workflow of this utility model is as follows: Figure 10As shown, during operation, the operator first aligns and connects the hydraulic converter's injection port 81 with the locomotive's traction pin's oil inlet, fixing the hydraulic converter to the traction pin's oil inlet. If stubborn grease buildup occurs, the cleaning arm 10 can be manually operated first, using its spiked part 102 to physically break through the grease layer and open the entry point. Then, the hydraulic converter is connected, and the oil pump is started. If the high-pressure grease still cannot clear the blockage, an external booster cylinder can be connected to the hexagonal connector body 3. The high-pressure grease is transported through the oil pipe 1, passing sequentially through the hexagonal connector body 3, the hydraulic quick-release connector 5, and the inlet chamber 7, finally spraying out from the injection port 81. The hydraulic impact force thoroughly removes residual grease and clears the passage. After clearing, the grease reservoir can be quickly switched and connected via the hydraulic quick-release connector 5 for direct grease injection. The detachable converter 8 design allows for changing the interface specifications according to different locomotive models. The spring protection ring 2 enhances the vibration resistance of the pipeline connection, while the dust cap 9 and waste oil collection cover respectively protect the interface and the working environment. Figure 9 As can be seen from the existing technical workflow, this utility model significantly reduces the complexity of the work, and the locomotive can be maintained without moving.

[0066] The entire process integrates mechanical cleaning, hydraulic erosion, and lubrication, enabling efficient operation in the narrow space under the locomotive.

[0067] It is understood that the components in the above embodiments can be freely combined with each other without conflict.

[0068] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A locomotive traction pin unblocking device, comprising an oil pump and an oil pipe (1) connected at one end to the oil pump, characterized in that: The other end of the oil pipe (1) is provided with a hydraulic conversion head. The hydraulic conversion head is internally connected and has a hexagonal connector body (3) connected to the oil pipe (1). The upper part of the hexagonal connector body (3) is connected to a hydraulic quick-release connector (5). The hydraulic quick-release connector (5) is connected to the hexagonal connector body (3) through a pipe joint locking nut (4). The upper part of the hydraulic quick-release connector (5) is provided with a liquid inlet chamber (7) for transferring lubricating grease. The side wall of the liquid inlet chamber (7) is provided with a liquid injection port (81). The relative angle between the liquid injection port (81) and the hexagonal connector body (3) is 45°-90°.

2. The locomotive traction pin unblocking device according to claim 1, characterized in that: The outer surface of the front end of the injection port (81) is provided with an umbrella-shaped locking member (83) that engages with the inner wall of the traction pin. One end of the umbrella-shaped locking member (83) is fixedly set at the front edge of the injection port (81), and the other end is provided with a push ring (82) that changes the shape of the umbrella-shaped locking member (83). The push ring (82) is provided with a buckle (821).

3. The locomotive traction pin unblocking device according to claim 1, characterized in that: A detachable rotating head (8) is provided between the injection port (81) and the inlet chamber (7). The injection port (81) is connected to one end of the detachable rotating head (8), and the inlet chamber (7) is connected to the other end of the detachable rotating head (8).

4. The locomotive traction pin unblocking device according to claim 1, characterized in that: A spring protective ring (2) is installed on the outer wall of the hexagonal connector body (3) at the connection between the hexagonal connector body (3) and the oil pipe (1).

5. The locomotive traction pin unblocking device according to claim 4, characterized in that: The spacing between the spring coils (2) is continuously and gradually distributed along the axial direction. The spring coils at the front end (21) are closely spaced, while the spring coils at the rear end (22) are spaced apart.

6. The locomotive traction pin unblocking device according to claim 1, characterized in that: A dust cap (9) is provided behind the injection port (81). The dust cap (9) has a cap ring (91) that is connected to the hydraulic converter head. The cap ring (91) is fixed to the outer surface of the hydraulic converter head by interference fit.

7. The locomotive traction pin unblocking device according to claim 1, characterized in that: The liquid inlet chamber (7) has a wrench clamping surface (6) below it for removing the liquid inlet chamber (7). One end of the wrench clamping surface (6) is connected to the hydraulic quick-release connector (5), and the other end is sealed to the sealing connector below the liquid inlet chamber (7).

8. The locomotive traction pin unblocking device according to claim 1, characterized in that: The liquid injection port (81) is fitted with a waste oil collection cover (11) for collecting leaked grease. The waste oil collection cover is an arc-shaped body with a hollow interior. The convex surface of the arc-shaped body has a through hole for the liquid injection port (81) to pass through. The edge of the arc-shaped body is embedded with an annular strong magnet (111) for adsorption and fixation.

9. The locomotive traction pin unblocking device according to claim 1, characterized in that: The side wall of the liquid inlet chamber (7) is provided with a transparent, closed observation window for observing the amount of lubricating grease.

10. The locomotive traction pin unblocking device according to any one of claims 1-9, characterized in that: The side wall of the liquid inlet chamber (7) is hinged with a movable scale removal swing arm (10). The front end of the scale removal swing arm (10) is provided with a spike (102). The spike (102) extends in a direction parallel to the axis of the liquid injection port (81) and protrudes from the end face of the liquid injection port (81).

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