A lubrication pin assembly

Abstract

This utility model discloses a lubrication pin assembly. The device includes: a pin, a connecting oil pipe, a flow meter, and a plunger pump. The pin has a central oil hole arranged axially, with a depth of 0.5-0.7 times the pin's length. An internal threaded interface is provided at the inlet of the central oil hole at the end of the pin. A lubrication hole communicating with the central oil hole is provided on the outer surface of the pin, and the lubrication hole is arranged radially. One end of the connecting oil pipe has an external threaded interface, which is threadedly connected to the internal threaded interface. The other end of the connecting oil pipe is connected to the flow meter and the plunger pump sequentially through a pipe. The plunger pump is connected to an oil tank. This utility model can form a closed, standardized connection with the oil injection pipe, preventing dust intrusion, accurately controlling the oil injection volume, reducing operational difficulty, and lowering maintenance costs.

Description

Technical Field

[0001] The utility model relates to the field of mechanical connectors, and particularly relates to a pin shaft assembly for lubrication. Background Art

[0002] In heavy equipment such as blast furnaces, the reliable operation of mechanical connection parts (such as pin shafts, copper sleeves, and spherical plain bearings) highly depends on effective lubrication. The traditional lubrication methods have the following defects: the lubrication path is limited, that is, it is difficult for external oil injection to reach the hidden friction surfaces inside the equipment, resulting in uneven lubrication; there is a risk of environmental pollution, that is, the open oil injection port is easily invaded by dust, causing oil passage blockage or lubricating oil pollution; the maintenance cost is high, that is, it is necessary to frequently stop the machine to supplement lubricating oil, and it is difficult for manual operation to accurately control the oil injection volume.

[0003] In the existing technical solutions, such as a lubricating pin shaft with the authorization announcement number of CN 204553463 U, although it has an oil hole, it lacks a standardized interface with an automated oil pipe. The open oil injection port is easily invaded by dust, causing oil passage blockage or lubricating oil pollution. It is necessary to frequently stop the machine to supplement lubricating oil, and it is difficult for manual operation to accurately control the oil injection volume, resulting in a high maintenance cost. Summary of the Invention

[0004] The purpose of the utility model is to overcome the deficiencies of the prior art and propose a pin shaft assembly for lubrication, which can form a closed standardized connection with an oil injection oil pipe, avoid dust invasion, accurately control the oil injection volume, reduce the operation difficulty, and has a low maintenance cost.

[0005] To achieve the above purpose, the utility model proposes the following technical solutions:

[0006] A pin shaft assembly for lubrication, comprising a pin shaft, a connecting oil pipe, a flowmeter, and a plunger pump.

[0007] The pin shaft is provided with a central oil hole arranged along the axial direction. The depth of the central oil hole is 0.5 - 0.7 of the length of the pin shaft. An internal thread interface is provided at the entrance of the central oil hole at the end of the pin shaft. The outer surface of the pin shaft is provided with lubricating holes communicated with the central oil hole, and the lubricating holes are arranged radially.

[0008] One end of the connecting oil pipe is provided with an external thread interface, which is threadedly connected with the internal thread interface; the other end of the connecting oil pipe is sequentially connected with a flowmeter and a plunger pump through a pipeline, and the plunger pump is connected with an oil tank.

[0009] Preferably, the connecting oil pipe is a high-temperature resistant lubricating pipe or a stainless steel lubricating pipe.

[0010] Preferably, a circular sealing groove is provided at the root of the internal thread interface, and an O-ring made of fluororubber is embedded in the circular sealing groove.

[0011] Preferably, the diameter of the lubrication holes is 1~3mm, and they are distributed in a ring along the outer surface of the shaft pin.

[0012] Preferably, the system also includes a PLC controller and a pressure sensor. The pressure sensor is embedded in the inner wall of the oil hole at the center of the shaft pin or at the inlet of the lubrication hole to monitor the oil pressure at the lubrication point in real time. The pressure sensor transmits signals to the PLC controller via wired or wireless means. The input terminal of the PLC controller is connected to the flow meter, and the output terminal of the PLC controller is connected to the drive motor of the plunger pump via an intermediate relay or AC contactor. The PLC controller dynamically adjusts the output pressure and flow rate of the plunger pump based on the feedback signals from the pressure sensor and the flow meter.

[0013] The connection between the PLC controller and the pressure sensor, flow meter, and piston pump drive motor mentioned above is existing technology.

[0014] Preferably, the pressure sensor is a MEMS piezoresistive sensor with a temperature range of -40℃ to 300℃, encapsulated in a ceramic substrate, and communicates with the PLC controller via a micro wire or radio frequency module.

[0015] The aforementioned MEMS piezoresistive sensor is existing technology.

[0016] Preferably, the connection between the shaft pin and the connecting oil pipe is coated with high-temperature resistant thread sealant, and a tightening torque is applied during assembly.

[0017] Specifically, insert the shaft pin into the copper sleeve and place the lubrication hole at the point where lubrication is required; connect the shaft pin, connecting oil pipe, flow meter, and plunger pump in sequence.

[0018] Start the plunger pump to begin oil injection. The lubricating oil is transmitted to the shaft pin through the connecting oil pipe, flows along the central oil hole to the lubrication hole, and flows out to the copper sleeve position to achieve effective lubrication of the copper sleeve.

[0019] The beneficial effects of this utility model are as follows:

[0020] This invention features an internal threaded interface at the end of the shaft pin, which forms a threaded connection with the connecting oil pipe. This effectively prevents dust and other impurities from seeping into the lubrication system, making the connection convenient, the operation simple, and maintaining the cleanliness and stability of the lubrication system.

[0021] This invention connects the shaft pin to the oil pump via an oil pipe. By controlling the flow rate and pressure of the oil pump, the amount of oil injected can be precisely controlled, reducing the difficulty of operation and the maintenance cost.

[0022] This utility model connects to the oil pump via a shaft pin and connecting oil pipe. The shaft pin can penetrate into various parts that require lubrication, such as internal shaft pins, spherical bearings, and copper sleeves. It can adapt to harsh on-site working environments, ensure that all connecting parts can achieve normal lubrication operation, reduce mechanical wear, reduce energy consumption of equipment operation, thereby improving the overall stability and reliability of mechanical equipment, extending the service life of equipment, and improving the overall cost performance of equipment.

[0023] This invention features a pressure sensor installed inside the shaft pin. The pressure sensor and flow meter are connected to a PLC controller. The PLC controller dynamically adjusts the output pressure and flow of the plunger pump based on the feedback signals from the pressure sensor and flow meter, thus achieving automated control of the oil injection volume and making it more intelligent.

[0024] By adopting the above solution, this utility model can form a closed and standardized connection with the oil injection pipe, preventing dust intrusion, accurately controlling the oil injection volume, reducing the difficulty of operation, and reducing maintenance costs. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of this utility model, 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 utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0026] Figure 1 This is a schematic diagram of the structure of the first embodiment.

[0027] Figure 2 yes Figure 1 Sectional view at point AA.

[0028] Figure 3 This is an exploded view of the first embodiment.

[0029] Figure 4 This is a cross-sectional view at point AA in the second embodiment.

[0030] Figure 5 This is the control principle diagram of the second embodiment.

[0031] In the diagram, 1-shaft pin, 2-connecting oil pipe, 11-center oil hole, 12-lubrication hole, 13-internal thread interface, 14-pressure sensor, 21-external thread interface. Detailed Implementation

[0032] To make the technical problems, technical solutions, and beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0033] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0034] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and 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 utility model.

[0035] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0036] First embodiment:

[0037] like Figures 1-3 As shown, a lubrication pin assembly includes a pin 1, a connecting oil pipe 2, a flow meter, and a plunger pump.

[0038] The pin 1 is provided with a central oil hole 11 arranged along the axial direction. The depth of the central oil hole 11 is 0.5 to 0.7 of the length of the pin 1. The end of the pin 1 is provided with an internal thread interface 13 at the entrance of the central oil hole 11. The outer surface of the pin 1 is provided with a lubrication hole 12 that communicates with the central oil hole 11. The lubrication hole 12 is arranged radially.

[0039] One end of the connecting oil pipe 2 is provided with an external threaded interface 21, which is threadedly connected to an internal threaded interface 13; the other end of the connecting oil pipe 2 is connected to a flow meter and a plunger pump in sequence through a pipeline, and the plunger pump is connected to an oil tank.

[0040] Specifically, insert the shaft pin 1 into the copper sleeve, and place the lubrication hole 12 at the location requiring lubrication; connect the shaft pin 1, connecting oil pipe 2, flow meter, and plunger pump in sequence.

[0041] Start the plunger pump and begin oil injection. The lubricating oil is transmitted to the shaft pin 1 through the connecting oil pipe 2, flows along the central oil hole 11 to the lubrication hole 12, and flows out to the copper sleeve position to achieve effective lubrication of the copper sleeve.

[0042] Second embodiment:

[0043] like Figures 1-3 As shown, a lubrication pin assembly includes a pin 1, a connecting oil pipe 2, a flow meter, and a plunger pump.

[0044] The pin 1 is provided with a central oil hole 11 arranged along the axial direction. The depth of the central oil hole 11 is 0.5 to 0.7 of the length of the pin 1. The end of the pin 1 is provided with an internal thread interface 13 at the entrance of the central oil hole 11. The outer surface of the pin 1 is provided with a lubrication hole 12 that communicates with the central oil hole 11. The lubrication hole 12 is arranged radially.

[0045] One end of the connecting oil pipe 2 is provided with an external threaded interface 21, which is threadedly connected to an internal threaded interface 13; the other end of the connecting oil pipe 2 is connected to a flow meter and a plunger pump in sequence through a pipeline, and the plunger pump is connected to an oil tank.

[0046] It also includes a PLC controller and a pressure sensor 14. The pressure sensor 15 is embedded in the inner wall of the central oil hole 11 of the shaft pin 1 or at the inlet of the lubrication hole 12 to monitor the oil pressure at the lubrication point in real time. The pressure sensor 14 transmits signals to the PLC controller via wired or wireless means. The input terminal of the PLC controller is connected to the flow meter, and the output terminal of the PLC controller is connected to the drive motor of the plunger pump via an intermediate relay or AC contactor. The PLC controller dynamically adjusts the output pressure and flow rate of the plunger pump based on the feedback signals from the pressure sensor 14 and the flow meter. Figure 4 and 5 As shown.

[0047] The pressure sensor 14 is a MEMS piezoresistive sensor with a temperature range of -40℃ to 300℃. It is encapsulated in a ceramic substrate and communicates with the PLC controller through a micro wire or radio frequency module.

[0048] Specifically, the shaft pin 1 is inserted into the copper sleeve, and the lubrication hole 12 is placed at the lubrication point; the shaft pin 1, connecting oil pipe 2, flow meter, plunger pump and PLC controller are connected, and the pressure sensor 15 is embedded in the inner wall of the central oil hole 11 of the shaft pin 1 or at the inlet of the lubrication hole 12.

[0049] The plunger pump is started to begin oil injection. The lubricating oil is transmitted to the shaft pin 1 through the connecting oil pipe 2, flows along the central oil hole 11 to the lubrication hole 12, and flows out to the copper sleeve position to achieve effective lubrication of the copper sleeve. During the oil injection process, the pressure sensor monitors the oil pressure at the lubrication point in real time and transmits the pressure status to the PLC controller in real time. The flow meter transmits the flow status to the PLC controller in real time. The PLC controller dynamically adjusts the output pressure and flow of the plunger pump based on the feedback signals from the pressure sensor 14 and the flow meter. When the oil injection pressure reaches a certain value, the plunger pump is immediately shut off to achieve precise control of the oil injection volume.

[0050] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A lubricated pin shaft assembly comprising a shaft pin, characterized by: It also includes connecting oil pipes, a flow meter, and a plunger pump. The shaft pin has a central oil hole arranged axially, with a depth of 0.5 to 0.7 times the length of the shaft pin. The end of the shaft pin has an internal threaded interface at the inlet of the central oil hole. The outer surface of the shaft pin has a lubrication hole communicating with the central oil hole, and the lubrication hole is arranged radially. One end of the connecting oil pipe has an external threaded interface, which is threadedly connected to the internal threaded interface. The other end of the connecting oil pipe is connected to the flow meter and the plunger pump in sequence through a pipe. The plunger pump is connected to the oil tank.

2. The lubrication pin assembly according to claim 1, characterized in that: The connecting oil pipe is a stainless steel lubrication pipe.

3. A lubrication pin assembly according to claim 1, characterized in that: The root of the internal threaded interface is provided with an annular sealing groove, and an O-ring is embedded in the annular sealing groove.

4. A lubrication pin assembly according to claim 1, characterized in that: The lubrication holes have a diameter of 1~3mm and are distributed in a ring along the outer surface of the shaft pin.

5. A lubrication pin assembly according to claim 1, characterized in that: It also includes a PLC controller and a pressure sensor. The pressure sensor is embedded in the inner wall of the oil hole in the center of the shaft pin or at the inlet of the lubrication hole. The pressure sensor transmits signals to the PLC controller via wired or wireless signals. The input terminal of the PLC controller is connected to the flow meter, and the output terminal of the PLC controller is connected to the drive motor of the plunger pump via an intermediate relay or AC contactor.

6. A lubrication pin assembly according to claim 1, characterized in that: The connection between the shaft pin and the connecting oil pipe is coated with thread sealant, and a tightening torque is applied during assembly.

7. A lubrication pin assembly according to claim 5, characterized in that: The pressure sensor is a MEMS piezoresistive sensor, encapsulated in a ceramic substrate and communicating with the PLC controller via a microwire or radio frequency module.

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