Oil supply integrated structure of motorized spindle

Abstract

The utility model relates to the technical field of electric spindle oil-gas lubrication, in particular to an electric spindle oil supply integrated structure. Comprising a mounting plate, an electric thin oil lubrication pump is fixed to the upper end of the mounting plate, the outlet end of the electric thin oil lubrication pump is communicated with the inlet end of an oil filter through an oil pipe, the outlet end of the oil filter is communicated with the oil inlet end of an oil-gas distribution block through a communicating pipe, and the outlet end of the oil-gas distribution block is communicated with a lubrication channel of an electric spindle. An air filter is fixed on the mounting plate, the inlet end of the air filter is communicated with an air source, the outlet end of the air filter is communicated with the first end of a tee joint, the second end of the tee joint is communicated with an air seal interface of the electric spindle, and the third end of the tee joint is communicated with an air inlet of the oil-gas distribution block. According to the technical scheme, through integrated, intelligent and modular design, the problems that a traditional electric spindle lubricating system is complex in installation, lagged in fault response, high in maintenance cost and the like are solved.

Description

Technical Field

[0001] This utility model relates to the field of electric spindle oil-air lubrication technology, specifically to an integrated oil supply structure for electric spindles. Background Technology

[0002] The electric spindle is the main component supporting high-speed cutting technology and a core functional component of high-precision, high-efficiency, and high-end CNC machine tools. During high-speed cutting operations, the electric spindle must withstand harsh conditions such as rapid speed increases and decreases and frequent changes in cutting forces. The working environment of the electric spindle objectively requires its supporting bearings to have good high-speed performance, high dynamic load-bearing capacity, good lubrication performance, and low heat generation.

[0003] Electric spindles that typically use oil-air lubrication require necessary accessories such as air filters, electric thin oil lubrication pumps, oil filters, and oil-air distribution blocks. When installed on machine tools, these accessories are installed separately and then connected by pipelines. This makes the installation process cumbersome, the wiring complex, the appearance messy, and the subsequent maintenance time-consuming and labor-intensive. Furthermore, the working status of the oil pump cannot be fed back in a timely manner.

[0004] Patent document CN113400085A discloses a high-speed electric spindle oil-air lubrication control system and its usage method. The steps are as follows: (I) Parameter setting: The debugging personnel pre-set the pumping interval time, pumping volume, pumping duration, and other actions of the electric spindle to be lubricated through the human-machine interactive PLC controller. After confirming the settings, the control signal will be transmitted to the four-piece unit of oil-air lubrication pump, oil-air lubrication distributor, and air filtration system to execute the above settings; (II) Generation of main air source: The compressed air from the main air source first passes through the four-piece unit of air filtration system to meet the air supply requirements of the oil-air lubrication system. The filtered compressed air flows through the air filtration system. The system uses a flow alarm to supply the main air source to the oil-gas lubrication distributor; (III) Lubricating oil injection: The lubricating oil is pumped out by the oil-gas lubrication pump, filtered by the lubricating oil filter, and then transported to the oil-gas lubrication distributor along the main oil supply pipe; (IV) Oil-gas mixed lubrication: After the human-machine interactive PLC controller sends a timed execution signal, the lubricating oil is pumped out from the oil-gas lubrication pump, and through the oil-gas lubrication distributor, the pre-set oil quantity is distributed to multiple oil-gas lubrication pipes connected to the bearings. Then, the filtered compressed air evenly and slowly delivers the small amount of lubricating oil in each pipe to each bearing along the pipe wall, thus completing the lubrication of the bearings. The system is equipped with an oil level alarm. When the amount of lubricating oil in the oil-gas lubrication pump is lower than the set level, the oil level alarm will sound an alarm to remind the operator to add new lubricating oil. When the gas oil quantity is insufficient, the gas flow alarm will also sound an alarm to notify the commissioning personnel, thus achieving the effect of safety warning. However, when the oil-gas lubrication pump is damaged but the gas flow is normal, neither the oil level alarm nor the gas flow alarm will trigger. However, at this time, the oil for lubricating the electric spindle cannot effectively reach the lubrication position, which can easily lead to damage to the bearings of the electric spindle. Utility Model Content

[0005] The main objective of this invention is to provide an integrated electric spindle oil supply structure that can be integrated and installed, and can detect the effective delivery of lubricating oil.

[0006] To achieve the above objectives, the technical solution provided by this utility model is as follows:

[0007] An integrated oil supply structure for an electric spindle includes a mounting plate. An electric thin oil lubrication pump is fixed at the upper end of the mounting plate. The outlet end of the electric thin oil lubrication pump is connected to the inlet end of an oil filter via an oil pipe. The outlet end of the oil filter is connected to the oil inlet end of an oil-air distribution block via a connecting pipe. The outlet end of the oil-air distribution block is connected to the lubrication channel of the electric spindle. A flow meter is installed on the oil pipe, which can detect the flow rate of lubricating oil in the oil pipe. The flow meter, controller, and alarm are electrically connected. An air filter is fixed on the mounting plate. The inlet end of the air filter is connected to an air source. The outlet end of the air filter is connected to the first end of a tee. The second end of the tee is connected to the air seal interface of the electric spindle. The third end of the tee is connected to the air inlet of the oil-air distribution block.

[0008] Specifically, the flow meter, oil filter, oil-gas distribution block, and air filter are fixed on the mounting plate.

[0009] Specifically, a liquid level sensor is installed in the oil tank of the electric thin oil lubrication pump, and the liquid level sensor, controller and alarm are electrically connected.

[0010] Specifically, the oil pipe is a rigid transparent pipe, and the flow meter is a clamp-on ultrasonic flow meter.

[0011] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0012] 1. By fixing core components such as the electric thin oil lubrication pump, oil filter, oil-air distribution block, and air filter onto the same mounting plate, the complex piping and messy appearance caused by traditional decentralized installation are avoided. The integrated design forms a standardized module that can be directly installed on the machine tool, reducing on-site assembly steps, shortening debugging time, and facilitating quick location of faulty components during later maintenance.

[0013] 2. When the flow meter detects no flow in the oil pipe, the controller will trigger an alarm even if the air supply is normal, thus addressing the vulnerability of existing technologies where the oil pump malfunctions and fails to trigger an alarm. The oil level sensor in the oil tank triggers an alarm when the oil level falls below a threshold, preventing dry friction damage to the bearings due to insufficient oil.

[0014] 3. The air filter and three-way structure design allow the filtered compressed air to be supplied to both the electric spindle air seal interface and the oil-air distribution block simultaneously, achieving synchronous air supply for air seal and oil-air mixed lubrication, and avoiding air pressure fluctuations.

[0015] 4. The oil-air distribution block uses air pressure to evenly distribute lubricating oil to each lubrication channel, ensuring stable delivery of small amounts of lubricating oil along the pipe wall and reducing oil waste. The dual filtration of the oil filter and air filter effectively intercepts particulate matter, extending the life of the electric spindle bearings.

[0016] 5. The transparent oil pipe allows direct observation of the oil flow, helping to quickly troubleshoot blockages or air bubbles and reducing downtime for testing. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure.

[0018] The components in the attached diagram are named as follows: 1. Mounting plate, 2. Electric thin oil lubrication pump, 3. Air filter, 4. Oil-air distribution block, 5. Oil pipe, 6. Oil filter, 7. Connecting pipe, 8. Flow meter, 9. Tee. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0020] Example 1: Refer to Figure 1 As shown, an integrated oil supply structure for an electric spindle includes a mounting plate 1. An electric thin oil lubrication pump 2 is fixed on the upper end of the mounting plate 1. The outlet end of the electric thin oil lubrication pump 2 is connected to the inlet end of an oil filter 6 via an oil pipe 5. The outlet end of the oil filter 6 is connected to the oil inlet end of an oil-gas distribution block 4 via a connecting pipe 7. The outlet end of the oil-gas distribution block 4 is connected to the lubrication channel of the electric spindle. A flow meter 8 is installed on the oil pipe 5. The flow meter 8 can detect the flow rate of lubricating oil in the oil pipe 5. The flow meter 8, controller, and alarm are electrically connected. An air filter 3 is fixed on the mounting plate 1. The inlet end of the air filter 3 is connected to an air source. The outlet end of the air filter 3 is connected to the first end of a tee 9. The second end of the tee 9 is connected to the air seal interface of the electric spindle. The third end of the tee 9 is connected to the air inlet of the oil-gas distribution block 4.

[0021] The flow meter 8, oil filter 6, oil-gas distribution block 4 and air filter 3 are fixed on the mounting plate 1.

[0022] Oil pipe 5 is a rigid transparent pipe, and flow meter 8 is a clamp-on ultrasonic flow meter.

[0023] The inlet of air filter 3 is connected to the air source. Electric thin oil lubrication pump 2 draws lubricating oil, which is then fed into oil distribution block 4 through oil pipe 5, oil filter 6, and connecting pipe 7. Compressed air, filtered by air filter 3, is fed into oil distribution block 4 through tee 9 to pressurize the lubricating oil. Under the action of oil distribution block 4, the lubricating oil is distributed to the lubrication channels of multiple electric spindles to complete the lubrication of the bearings.

[0024] This invention integrates an air filter 3, an electric thin oil lubrication pump 2, an oil filter 6, and an oil-gas distribution block 4 onto a single mounting plate 1, and adds an alarm connected to a flow meter 8. The alarm provides feedback on the delivery status of the electric thin oil lubrication pump 2. When the electric thin oil lubrication pump 2 malfunctions and there is no lubricating oil being delivered into the oil pipe 5, the alarm will sound, reminding personnel to inspect and repair the lubrication system.

[0025] Example 2: Based on Example 1, referring to... Figure 1 As shown, a liquid level sensor is installed in the oil tank of the electric thin oil lubrication pump 2, and the liquid level sensor, controller and alarm are electrically connected.

[0026] The oil tank of the electric thin oil lubrication pump 2 can hold 1.8L of oil. When the oil level is lower than 0.36L, the alarm will sound to remind the staff to add lubricating oil.

[0027] The above description is only a preferred embodiment of the present utility model and is 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. An oil supply integrated structure of an electric spindle, comprising a mounting plate (1), an electric thin-oil lubrication pump (2) being fixed on the upper end of the mounting plate (1), characterized in that, The outlet end of the electric thin-oil lubrication pump (2) is communicated with the inlet end of the oil filter (6) through the oil pipe (5), the outlet end of the oil filter (6) is communicated with the oil inlet end of the oil-gas distribution block (4), the outlet end of the oil-gas distribution block (4) is communicated with the lubrication channel of the electric spindle, the flow meter (8) is installed on the oil pipe (5), the flow meter (8) can detect the flow of the lubricating oil in the oil pipe (5), the flow meter (8), the controller and the alarm are electrically connected, the air filter (3) is fixed on the mounting plate (1), the inlet end of the air filter (3) is communicated with the air source, the outlet end of the air filter (3) is communicated with the first end of the three-way pipe (9), the second end of the three-way pipe (9) is communicated with the air-tight seal interface of the electric spindle, and the third end of the three-way pipe (9) is communicated with the air inlet of the oil-gas distribution block (4).

2. The oil supply integrated structure of an electric spindle according to claim 1, wherein The flow meter (8), the oil filter (6), the oil-gas distribution block (4) and the air filter (3) are fixed on the mounting plate (1).

3. The oil supply integrated structure of the motorized spindle according to claim 1, wherein A liquid level sensor is installed in the oil tank of the electric thin-oil lubrication pump (2), and the liquid level sensor, the controller and the alarm are electrically connected.

4. The oil supply integrated structure of the motorized spindle according to claim 1, wherein The oil pipe (5) is a hard transparent pipe, and the flow meter (8) is a clamping type ultrasonic flow meter.

5. The oil supply integrated structure of the motorized spindle according to claim 1, wherein The outlet end of the oil filter (6) is communicated with the oil inlet end of the oil-gas distribution block (4) through the communication pipe (7).

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