Mining tunneling engineering machinery pin shaft lubricating oil duct dredging device

Abstract

The utility model discloses a mining tunneling engineering machinery pin shaft lubricating oil duct dredging device which comprises a mounting seat, an oil storage barrel is fixed at the center of the top surface of the mounting seat, a large oil cylinder is arranged in the oil storage barrel, the bottom end of the large oil cylinder is fixed on the mounting seat, and a disc is fixedly welded at the top in the large oil cylinder. According to the device, through the arrangement of the small oil cylinder and the large oil cylinder, hydraulic oil in the oil storage barrel can be continuously pressed into the large oil cylinder when the piston column is pushed and pulled up and down through the wrench to move, in the process, due to the lever effect, the force on the hand is increased by multiple times through the wrench to the piston column, and the force from the small oil cylinder to the large oil cylinder is increased by multiple times (like the principle of a hydraulic jack); at the moment, hydraulic oil entering the large oil cylinder sequentially passes through the L-shaped connecting pipe, the hydraulic pipe and the oil injection nozzle to enter an oil way in the pin shaft, when the spanner is continuously swung up and down, the hydraulic oil under strong pressure can easily jack up blockages at the oil outlet end of the oil way in the pin shaft, and then the purpose of dredging a lubricating oil way of the pin shaft is effectively achieved.

Description

Technical Field

[0001] This utility model relates to the field of engineering machinery, specifically to a device for unblocking the lubrication oil passage of a pin shaft in mining tunneling machinery. Background Technology

[0002] Pins typically bear only radial loads. When they also bear axial loads and the static load exceeds 30t, they are usually called heavy-duty pins. Heavy-duty pins generally need to be used with steel-backed bearings. During operation, the pin rotates inside the steel-backed bearing, requiring good lubrication. Commonly used pins have axial and radial oil passages, with bore diameters typically ranging from φ6mm to φ8mm. Under normal circumstances, external grease reaches the contact surface between the pin and the steel-backed bearing through these passages, providing lubrication. The oil filling end of the oil passage is screwed with a grease nipple. Pins with this type of oil passage structure have the following problems: due to severe wear, debris... There is a risk of the oil passage outlet being blocked. Once the oil passage outlet is blocked, lubrication will be poor, which will cause dry friction, abnormal noise, or even seizing of the pin and bearing. When the oil passage outlet is blocked, the grease can no longer be forced into the oil passage through the grease nipple, which will prevent the grease from reaching the contact surface between the pin and the steel back bearing. At present, when unblocking the pin oil passage, the debris and blockage at the oil outlet are usually removed little by little by using tools such as screwdrivers and needles. This method of unblocking the oil passage is time-consuming and laborious, and the unblocking effect is not good.

[0003] Therefore, this utility model designs a device for clearing the lubrication oil passage of the pin shaft in mining tunneling machinery to solve the problems mentioned above. Utility Model Content

[0004] To address the aforementioned problems, this utility model provides a device for unblocking the lubrication oil passages of pins in mining tunneling machinery.

[0005] This utility model is achieved through the following technical solution:

[0006] A device for unblocking the lubrication oil passage of a pin in mining tunneling machinery includes a mounting base. An oil reservoir is fixed at the center of the top surface of the mounting base. A large hydraulic cylinder is housed inside the oil reservoir, and its bottom end is fixed to the mounting base. A disc is welded and fixed to the top of the large hydraulic cylinder. An L-shaped connecting pipe is fixed to the top surface of the disc, communicating with the large hydraulic cylinder. A hydraulic pipe is connected to one end of the L-shaped connecting pipe, and an oil injection nozzle is connected to the other end of the hydraulic pipe. A small hydraulic cylinder is fixed to one side of the top surface of the mounting base. A sliding... The device is equipped with a piston rod, a wrench is hinged to the top of the piston rod, a connecting rod is hinged to one end of the wrench, and the bottom end of the connecting rod is hinged to the mounting base. The mounting base has a first oil passage connecting the small oil cylinder and the oil reservoir, a second oil passage connecting the small oil cylinder and the large oil cylinder, and a third oil passage connecting the large oil cylinder and the oil reservoir. A sealing bolt is screwed to one side of the mounting base, which can seal the third oil passage. One-way valves are respectively provided at one end of the first and second oil passages.

[0007] Preferably, the hydraulic pipe is plugged into the L-shaped connecting pipe, the L-shaped connecting pipe has a quick-connect interface at its port, the hydraulic pipe is threaded into the oil injection nozzle, one end of the oil injection nozzle has a thread for screwing into the hydraulic pipe, and the other end of the oil injection nozzle has a thread for screwing into the oil passage port of the pin.

[0008] Preferably, a sealing disc is screwed onto the top of the outer side of the large oil cylinder, and the bottom surface of the sealing disc is sealed and fitted to the top of the oil reservoir.

[0009] Preferably, an oil filling bucket is fixed to the top of the side wall of the oil storage tank, and the oil filling bucket is connected to the oil storage tank.

[0010] Compared with existing technologies, the beneficial effects of this utility model are as follows: This device, through the setting of small and large oil cylinders, can continuously press the hydraulic oil in the oil reservoir into the large oil cylinder when the piston column is moved up and down by the wrench. During this process, due to the leverage effect, the force on the hand is increased many times through the wrench to the piston column, and the force from the small oil cylinder to the large oil cylinder is increased many times (similar to the principle of a hydraulic jack). At this time, the hydraulic oil entering the large oil cylinder enters the internal oil passage of the pin shaft through the L-shaped connecting pipe, hydraulic pipe, and oil injection nozzle in sequence. When the wrench is continuously moved up and down, the high-pressure hydraulic oil can easily push out the blockage at the oil outlet of the internal oil passage of the pin shaft, thereby effectively achieving the purpose of unblocking the lubrication oil passage of the pin shaft. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the structure described in this utility model;

[0012] Figure 2 The structure described in this utility model Figure 1 Partial structural diagram;

[0013] Figure 3 The structure described in this utility model Figure 1 Partial structural diagram;

[0014] Figure 4 This is a schematic diagram of an existing pin shaft mentioned in the background art of this utility model;

[0015] Figure 5 The structure described in this utility model Figure 1 A sectional view;

[0016] Figure 6 The structure described in this utility model Figure 1 Cross-section Figure 1 .

[0017] In the diagram: 1. Mounting base; 2. Oil reservoir; 3. Small oil cylinder; 4. Wrench; 5. Oil filling hopper; 6. Sealing plate; 7. Large oil cylinder; 8. Disc; 9. L-shaped connecting pipe; 10. Hydraulic pipe; 11. Oil injection nozzle; 12. First oil circuit; 13. Second oil circuit; 14. Third oil circuit; 15. Sealing bolt; 16. Piston column; 17. Connecting rod. Detailed Implementation

[0018] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments:

[0019] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 As shown, a device for unblocking the lubrication oil passage of a pin shaft in mining tunneling machinery includes a mounting base 1. An oil reservoir 2 is fixed at the center of the top surface of the mounting base 1. A large hydraulic cylinder 7 is installed inside the oil reservoir 2. The bottom end of the large hydraulic cylinder 7 is fixed to the mounting base 1. A disc 8 is welded and fixed to the top of the large hydraulic cylinder 7. An L-shaped connecting pipe 9 is fixed to the top surface of the disc 8, communicating with the large hydraulic cylinder 7. A hydraulic pipe 10 is connected to one end of the L-shaped connecting pipe 9, and an oil injection nozzle 11 is connected to the other end of the hydraulic pipe 10. A small hydraulic cylinder 3 is fixed to one side of the top surface of the mounting base 1, and a piston slides inside the small hydraulic cylinder 3. The piston column 16 has a wrench 4 hinged to its top end. A connecting rod 17 is hinged to one end of the wrench 4. The bottom end of the connecting rod 17 is hinged to the mounting base 1. The mounting base 1 has a first oil passage 12 connecting the small oil cylinder 3 and the oil reservoir 2. The mounting base 1 also has a second oil passage 13 connecting the small oil cylinder 3 and the large oil cylinder 7. Furthermore, the mounting base 1 has a third oil passage 14 connecting the large oil cylinder 7 and the oil reservoir 2. A sealing bolt 15 is screwed to one side of the mounting base 1. The sealing bolt 15 can block the third oil passage 14. One-way valves are respectively provided at one end of the first oil passage 12 and the second oil passage 13.

[0020] The hydraulic pipe 10 is connected to the L-shaped connecting pipe 9 by insertion. The L-shaped connecting pipe 9 has a quick-connect interface at its port. The hydraulic pipe 10 is connected to the oil injection nozzle 11 by thread. One end of the oil injection nozzle 11 has a thread that is screwed to the hydraulic pipe 10, and the other end of the oil injection nozzle 11 has a thread that is screwed to the oil passage port of the pin.

[0021] A sealing disc 6 is screwed onto the top of the outer side of the large oil cylinder 7, and the bottom surface of the sealing disc 6 is sealed and fitted to the top of the oil storage cylinder 2.

[0022] An oil filling hopper 5 is fixed to the top of the side wall of the oil storage tank 2, and the oil filling hopper 5 is connected to the oil storage tank 2.

[0023] Working principle;

[0024] In use, the oil nozzle on the original pin is unscrewed, and the oil nozzle 11 of this device is screwed to the oil filling port of the pin's oil passage. Hydraulic oil is then added to the oil reservoir 2 through the oil filling hopper 5. Subsequently, the piston rod 16 is moved upwards by the wrench 4, and the hydraulic oil in the oil reservoir 2 is drawn into the small oil cylinder 3 through the first oil passage 12 and a one-way valve at one end. When the wrench 4 is pressed down, the piston rod 16 moves downwards, and the first oil passage 12 is blocked by the one-way valve at one end. The oil in the small oil cylinder 3 then flows through the second oil passage... 13 and its one-way valve are pressed into the large hydraulic cylinder 7. Due to the lever effect, the force applied by hand is amplified many times through the wrench to the piston rod 16, and the force from the small hydraulic cylinder 3 to the large hydraulic cylinder 7 is amplified many times again (similar to the principle of a hydraulic jack). At this time, the hydraulic oil entering the large hydraulic cylinder 7 enters the internal oil passage of the pin shaft through the L-shaped connecting pipe 9, the hydraulic pipe 10, and the grease fitting 11 in sequence. When the wrench 4 is continuously swung, the high-pressure hydraulic oil can easily push up the blockage at the oil outlet of the internal oil passage of the pin shaft, thereby effectively clearing the lubrication passage of the pin shaft. After the lubrication passage of the pin shaft is cleared, the sealing bolt 15 can be manually loosened. In this way, the sealing bolt 15 will no longer block the third oil passage 14, and the high-pressure oil in the large hydraulic cylinder 7 can flow back into the oil reservoir 2, preventing the hydraulic oil from continuously leaking from the grease fitting 11 under the remaining high pressure.

[0025] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A device for clearing lubricating oil passages of pin shafts in mining tunneling machinery, comprising a mounting base (1), characterized in that; An oil reservoir (2) is fixed at the center of the top surface of the mounting base (1). A large oil cylinder (7) is installed inside the oil reservoir (2). The bottom end of the large oil cylinder (7) is fixed on the mounting base (1). A disc (8) is welded and fixed to the top of the large oil cylinder (7). An L-shaped connecting pipe (9) is fixed to the top surface of the disc (8). The L-shaped connecting pipe (9) is connected to the large oil cylinder (7). A hydraulic pipe (10) is connected to one end of the L-shaped connecting pipe (9). An oil injection nozzle (11) is connected to the other end of the hydraulic pipe (10). A small oil cylinder (3) is fixed to one side of the top surface of the mounting base (1). A piston column (16) is slidably installed inside the small oil cylinder (3). A wrench is hinged to the top of the piston column (16). (4) One end of the wrench (4) is hinged to a connecting rod (17), the bottom end of the connecting rod (17) is hinged to the mounting base (1), the mounting base (1) has a first oil passage (12) connecting the small oil cylinder (3) and the oil reservoir (2), the mounting base (1) has a second oil passage (13) connecting the small oil cylinder (3) and the large oil cylinder (7), and the mounting base (1) also has a third oil passage (14) connecting the large oil cylinder (7) and the oil reservoir (2), a sealing bolt (15) is screwed to one side of the mounting base (1), the sealing bolt (15) can seal the third oil passage (14), and one-way valves are respectively provided at one end of the first oil passage (12) and the second oil passage (13).

2. The device for clearing lubricating oil passages of pins in mining tunneling machinery according to claim 1, characterized in that: The hydraulic pipe (10) is connected to the L-shaped connecting pipe (9) by insertion. The L-shaped connecting pipe (9) has a quick-connect insertion interface on its port. The hydraulic pipe (10) is connected to the oil injection nozzle (11) by thread. One end of the oil injection nozzle (11) is threaded to be screwed to the hydraulic pipe (10), and the other end of the oil injection nozzle (11) is threaded to be screwed to the oil passage port of the pin.

3. The device for clearing lubricating oil passages of pins in mining tunneling machinery according to claim 1, characterized in that: The top of the outer side of the large oil cylinder (7) is screwed with a sealing disc (6), and the bottom surface of the sealing disc (6) is sealed and fitted to the top of the oil storage cylinder (2).

4. The device for clearing lubricating oil passages of pins in mining tunneling machinery according to claim 1, characterized in that: The top of the side wall of the oil storage tank (2) is fixed with a filling bucket (5), and the filling bucket (5) is connected to the oil storage tank (2).

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