Directional oil injection lubricating mechanism for main shaft of numerical control boring machine

Abstract

The utility model provides a boring shaft directional oil injection lubricating mechanism of a numerical control boring machine spindle, which comprises a directional induction wheel, a synchronous pulley, a transmission guide key, an inner oil inlet labyrinth ring, a labyrinth ring, a spindle outer sleeve and an oil storage tank, the directional induction wheel is mounted on the side edge of the synchronous pulley, and the transmission guide key is mounted at one end of the inner side of the synchronous pulley. The end of the synchronous pulley is sleeved with a rear bearing, and the edge of the oil storage tank communicates with an oil discharge outlet. The directional oil injection system can ensure that oil can be lubricated in front of the boring shaft, and a numerical control system is connected, so that oil can be injected to lubricate the boring shaft in a timing, directional and fixed-function mode. According to the technical scheme, automatic oil injection is achieved, labor and oil are saved, oil is quantified, lubricating oil is not wasted, a rotary sealing ring component is removed, the problems of oil leakage caused by abrasion and regular replacement are effectively avoided, a plurality of holes are additionally formed in a plurality of core parts, and the core parts are connected with a PLC of an electric control system correspondingly, so that the corresponding effect can be achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of numerically controlled boring machines, in particular to a directional oil injection and lubrication mechanism for a main shaft of a numerically controlled boring machine. Background Art

[0002] A horizontal CNC boring machine is a high-precision, high-speed, and high-value machine tool. Its spindle performs both rotational and linear reciprocating motion. Not only does the boring spindle rotate with the hollow spindle, but it also reciprocates within the hollow spindle. The hollow spindle is supported by bearings for rotation, and the bearings can be lubricated using grease, oil-air, or oil spray. However, lubricating the central boring spindle has always been a challenge in the industry. The outer layer of the boring spindle is surrounded by a hollow milling spindle, which rotates. The oiling mechanism does not rotate, so the injected oil is thrown out by the centrifugal force of the rotation, making it difficult for the oil to enter and lubricate the boring spindle.

[0003] There are two methods of lubricating boring spindles on the market: manual oiling when the boring spindle is stopped; and adding a rotating oiling device behind the milling spindle to inject lubricating oil into the keyway of the boring bar. When the boring bar extends forward, a small amount of lubricating oil is carried to the middle of the boring bar. In this method, oil is injected from the back, and there is still no lubricating oil in front of the boring bar. Utility Model Content

[0004] In response to the shortcomings of the prior art, the present invention aims to provide a directional oil injection and lubrication mechanism for the spindle of a CNC boring machine to address the problems raised in the above-mentioned background art. The present invention not only ensures that the front of the boring spindle is lubricated with oil through a directional oil injection system, but also connects to the CNC system to lubricate the boring spindle at a fixed time and action. This achieves automatic oil injection, saving labor and oil, and ensuring that the lubricant is not wasted.

[0005] In order to achieve the above-mentioned purpose, the utility model is realized through the following technical scheme: a directional oil injection lubrication mechanism for the spindle of a CNC boring machine includes a lubrication mechanism body, the lubrication mechanism body includes a directional sensing wheel, a synchronous pulley, a transmission guide key, an inner oil inlet labyrinth ring, a labyrinth ring, a spindle outer sleeve and an oil storage tank, a directional sensing wheel is installed on the side of the synchronous pulley, a transmission guide key is installed on the inner end of the synchronous pulley, a rear bearing is provided on the end of the synchronous pulley, and an oil drain port is connected to the edge of the oil storage tank.

[0006] Furthermore, a front bearing is installed on the side of the inner oil inlet labyrinth ring, the end of the front bearing is against the side of the labyrinth ring, and an outer oil isolation ring is installed on the side of the labyrinth ring.

[0007] Furthermore, an oil inlet is provided on the side of the main shaft outer sleeve, and an O-ring is embedded on the surface of the oil inlet.

[0008] Furthermore, it also includes a front pressure cover, the inner side of the front pressure cover is embedded with a pressure ring, the side of the pressure ring is embedded with an oil retaining ring, and the outer oil isolation ring is installed on the inner side of the main shaft outer sleeve.

[0009] Furthermore, the invention also comprises a hollow main shaft, an ash retaining ring is embedded inside the hollow main shaft, a boring shaft is inserted in the middle of the hollow main shaft, and the ash retaining ring is sleeved on the surface of the boring shaft. An oil storage tank is provided on the inner wall of the hollow main shaft.

[0010] Furthermore, the oil storage tank is installed on the outside of the boring spindle, and the inner side of the end of the boring spindle is a tapered structure, and the boring spindle performs reciprocating cyclic motion.

[0011] Furthermore, the top of the spindle outer sleeve is communicated with the external spindle housing, and the position of the oil drain port is lower than the horizontal position of the labyrinth ring of the bearing oil retaining device.

[0012] Furthermore, the oil injection and lubrication mechanism is connected to the CNC system for control, and the integrated lubrication pump is started by the CNC system PLC to open the hollow spindle for oil injection. The oil flows from the top of the hollow spindle through the spindle outer sleeve, the outer oil isolation ring, and the inner oil inlet maze ring until the oil level at the bottom increases to the oil storage tank in the inner hole of the hollow spindle to achieve lubrication of the boring spindle.

[0013] Beneficial effects of the utility model:

[0014] 1. The directional oil injection and lubrication mechanism of the CNC boring machine spindle has high reliability. The rotating sealing ring component is removed through this structure, so that the device effectively avoids the problems of wear and tear, oil leakage and regular replacement.

[0015] 2. The directional oil injection lubrication mechanism of the CNC boring machine spindle ensures that the boring spindle is fully lubricated with oil, which is better than manual oil injection and rear oil injection forward method.

[0016] 3. This CNC boring machine spindle directional oil injection lubrication mechanism is practical and economical. This structure is achieved by adding multiple holes to several core components. This solution is connected to the PLC of the electronic control system and is more cost-effective than the pressurized method using a hydraulic rotary joint. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a longitudinal cross-sectional view of the spindle of the directional oil injection and lubrication mechanism of the spindle of the CNC boring machine according to the present invention;

[0018] Figure 2 for Figure 1 Enlarged view of area A in the middle;

[0019] Figure 3 A diagram of the lubricant path and filled space;

[0020] Figure 4 This is the position diagram of the spindle when oiling.

[0021] In the figure: 1. Directional induction wheel; 2. Synchronous pulley; 3. Transmission guide key; 4. Rear bearing; 5. Front bearing; 6. Inner oil inlet labyrinth; 7. Labyrinth; 8. Outer oil isolation ring; 9. Oil inlet; 10. O-ring; 11. Spindle housing; 12. Front pressure cover; 13. Pressure ring; 14. Oil retaining ring; 15. Hollow spindle; 16. Dust retaining ring; 17. Boring spindle; 18. Oil storage tank; 19. Oil drain port. DETAILED DESCRIPTION

[0022] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods.

[0023] See also Figures 1 to 4 The present invention provides the following technical solution: a directional oil injection lubrication mechanism for a CNC boring machine spindle, comprising a lubrication mechanism body, the lubrication mechanism body comprising a directional induction wheel 1, a synchronous pulley 2, a transmission guide key 3, an inner oil inlet labyrinth 6, a labyrinth 7, a spindle housing 11, and an oil reservoir 18. The directional induction wheel 1 is mounted on the side of the synchronous pulley 2, the transmission guide key 3 is mounted on one inner end of the synchronous pulley 2, a rear bearing 4 is sleeved on the end of the synchronous pulley 2, and an oil drain port 19 is connected to the edge of the oil reservoir 18. A front bearing 5 is mounted on the side of the inner oil inlet labyrinth 6, the end of the front bearing 5 rests against the side of the labyrinth 7, and an outer oil isolation ring 8 is mounted on the side of the labyrinth 7. An oil inlet 9 is formed on the side of the spindle housing 11, and an O-ring 10 is embedded in the surface of the oil inlet 9.

[0024] The CNC boring machine spindle directional oil injection lubrication mechanism is highly reliable. By eliminating the rotating seal ring component, the device effectively avoids wear and tear, oil leakage, and the need for regular replacement. The directional oil injection lubrication mechanism ensures that the boring spindle 17 is fully lubricated, which is superior to manual oil injection and rear oil injection.

[0025] This embodiment further includes a front gland 12, with a pressure ring 13 embedded inside. An oil retaining ring 14 is embedded on the side of the pressure ring 13. The outer oil isolation ring 8 is mounted on the inside of the spindle housing 11. It also includes a hollow spindle 15, with an ash retaining ring 16 embedded inside. A boring spindle 17 is inserted through the middle of the hollow spindle 15, and the ash retaining ring 16 is sleeved on the surface of the boring spindle 17. An oil reservoir 18 is mounted on the outside of the boring spindle 17, and the inner end of the boring spindle 17 has a tapered structure. The boring spindle 17 performs reciprocating motion. The top of the spindle housing 11 is connected to the external spindle housing. The oil drain port 19 is positioned below the horizontal position of the labyrinth ring 7, which retains the oil from the bearing. This oil injection and lubrication mechanism is connected to a numerical control system for control, and the integrated lubrication pump is activated by the numerical control system's PLC to inject oil into the hollow spindle 15.

[0026] This solution can be realized by adding multiple holes to several core components and connecting them to the PLC of the electronic control system. This is more cost-effective than the pressurization method using hydraulic rotary joints.

[0027] The above shows and describes the basic principles, main features and advantages of the present invention. For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention.

[0028] Working principle:

[0029] Above the spindle housing 11, there is a connection to the spindle housing, and the interface is sealed with a sealing ring. The spindle has an induction wheel with a milled notch. When the induction wheel rotates, it responds to the proximity switch, generating an electrical signal that allows the spindle to be precisely positioned. This system sets the spindle to a precise stop position, aligned directly above the oil inlet 9. When the spindle needs to be lubricated, it is precisely stopped at the top. Arrows are engraved on the corresponding end surfaces of the rotating and fixed bodies. The precise stop position is where the arrows align. The system PLC then activates the integrated lubrication pump to lubricate the spindle. The lubricating oil flows through the spindle housing 11, then through the oil separator, and into the aligned inner oil inlet labyrinth 6. Gravity forces the oil downward to fill the cavity between the spindle and the hollow milling spindle. The lubricating oil is then siphoned into the oil storage ring groove and spiral groove between the hollow milling spindle and the boring spindle 17. During the lubrication process, the boring spindle 17 reciprocates 2 to 3 times. In this way, the boring shaft 17 has sufficient lubricating oil and the lubricating oil is brought to the front and middle of the boring shaft 17 (there is a suspended oil storage space in the middle of the hollow main shaft 15). When the lubricating oil reaches the set oil filling amount or oil filling time, the PLC stops the lubrication pump from filling oil. If too much lubricating oil is added to prevent it from entering the bearing, the excess oil will be discharged from the oil drain port 19 directly below the front through the pipe, because the position of the oil drain port 19 is lower than the horizontal position of the labyrinth ring 7 of the bearing oil barrier. After a period of time, when the lubricating oil is used up, the PLC restarts the lubrication pump. Usually, this lubrication is done once every half a day before starting the machine. If the boring shaft 17 frequently makes reciprocating motions during operation, the oil filling frequency should be increased according to the situation.

[0030] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A directional oil injection lubrication mechanism for a CNC boring machine spindle, comprising a lubrication mechanism body, characterized in that: The lubrication mechanism body comprises a directional induction wheel (1), a synchronous pulley (2), a transmission guide key (3), an inner oil inlet labyrinth ring (6), a labyrinth ring (7), a main shaft outer sleeve (11) and an oil storage tank (18). The directional induction wheel (1) is installed on the side of the synchronous pulley (2), the transmission guide key (3) is installed on the inner end of the synchronous pulley (2), the end of the synchronous pulley (2) is sleeved with a rear bearing (4), and the edge of the oil storage tank (18) is connected to an oil discharge port (19).

2. The directional oil injection and lubrication mechanism for the spindle of a CNC boring machine according to claim 1, characterized in that: A front bearing (5) is installed on the side of the inner oil inlet labyrinth ring (6), and the end of the front bearing (5) is pressed against the side of the labyrinth ring (7). An outer oil isolation ring (8) is installed on the side of the labyrinth ring (7).

3. The directional oil injection and lubrication mechanism for the spindle of a CNC boring machine according to claim 2, characterized in that: An oil inlet (9) is provided on the side of the main shaft outer sleeve (11), and an O-ring (10) is embedded on the surface of the oil inlet (9).

4. The directional oil injection and lubrication mechanism for the spindle of a CNC boring machine according to claim 2, characterized in that: It also includes a front pressure cover (12), the inner side of the front pressure cover (12) is embedded with a pressure ring (13), the side of the pressure ring (13) is embedded with an oil retaining ring (14), and the outer oil isolation ring (8) is installed on the inner side of the main shaft outer sleeve (11).

5. The directional oil injection and lubrication mechanism for the spindle of a CNC boring machine according to claim 1, characterized in that: The hollow main shaft (15) is also included. A dust-blocking ring (16) is embedded inside the hollow main shaft (15). A boring shaft (17) is inserted in the middle of the hollow main shaft (15), and the dust-blocking ring (16) is sleeved on the surface of the boring shaft (17).

6. The directional oil injection and lubrication mechanism for the spindle of a CNC boring machine according to claim 5, characterized in that: The oil storage tank (18) is installed on the outside of the boring shaft (17), and the inner side of the end of the boring shaft (17) is a tapered structure, and the boring shaft (17) performs reciprocating cyclic motion.

7. The directional oil injection and lubrication mechanism for the spindle of a CNC boring machine according to claim 4, characterized in that: The top of the spindle outer sleeve (11) is communicated with the external spindle housing, and the position of the oil drain port (19) is lower than the horizontal position of the labyrinth ring (7) for retaining oil from the bearing.

8. The directional oil injection and lubrication mechanism for the spindle of a CNC boring machine according to claim 5, characterized in that: The oil injection lubrication mechanism is connected to a numerical control system for control, and the integrated lubrication pump is started by the numerical control system PLC, and oil flows from the top of the hollow main shaft (15) through the main shaft outer sleeve (11), the outer oil isolation ring (8), and the inner oil inlet labyrinth ring (6) until the oil level at the bottom increases to the oil storage tank (18) in the inner hole of the hollow main shaft (15) to achieve lubrication of the boring shaft (17).

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