Air curtain protection waterproof structure of machine tool spindle

Abstract

The utility model discloses an air curtain protection waterproof structure of a machine tool spindle, which comprises a shell, a gland, an inner sealing gasket, an outer sealing gasket, a bushing and a sealing nut, the shell is sleeved at the front end of the outer side of the spindle, the gland is sleeved at the outer side of the spindle and is positioned at the front end of the shell, the bushing is arranged between the gland and the spindle, and the sealing nut is arranged in the shell. The sealing nut is arranged on the outer side of the main shaft and located at the front end of the lining, an air inlet is formed in one end of the shell, an air inlet channel is formed in the shell, a plurality of air distribution holes are obliquely formed in the front end of the lining in the circumferential direction at intervals, and one ends of the air distribution holes are communicated with the air continuing cavity; and the other end is communicated with a spiral air passage formed between the sealing nut and the bushing. Through the arrangement of the air inlet, the air continuing cavity, the air distribution holes, the spiral air channel and the like, air flow can be introduced into the joint of the front end of the main shaft and the gland, so that an air curtain effect is generated, external moisture and impurities cannot enter the main shaft, and the long-term stable operation of the main shaft is ensured.

Description

Technical Field

[0001] This utility model relates to the field of lathe spindle waterproofing technology, and in particular to an air curtain protection waterproofing structure for machine tool spindles. Background Technology

[0002] With the widespread application of lightweight alloy materials in the design and manufacturing of automotive, aerospace, and other industrial products in recent years, high-speed and stable machining has become an important development trend in advanced manufacturing technology. Technological upgrades face increasingly complex environments and fiercer competition leading to more extreme customer demands. Improving machining efficiency is paramount. As the core rotating machining component of CNC machine tools, the spindle plays an increasingly important role. Therefore, reducing the spindle failure rate is particularly crucial, with water ingress being the leading cause of spindle damage.

[0003] Existing spindle waterproofing technologies, such as the waterproof structure for a machine tool spindle disclosed in patent CN220805495U, improve the sealing effect between the second end cover and the spindle near the spindle core by setting a sealing gasket, thereby preventing water from entering the bearing from the inside and damaging the spindle. However, this waterproofing method is passive. Over time, the sealing gasket will inevitably age, crack, and wear, leading to seal failure and causing water to enter and damage the spindle. Therefore, this passive waterproofing structure needs improvement. Utility Model Content

[0004] To solve the above-mentioned technical problems, this utility model discloses an air curtain protection and waterproof structure for a machine tool spindle, including a housing, a pressure cover, an inner sealing gasket, an outer sealing gasket, a bushing, and a sealing nut. The housing is sleeved on the outer front end of the spindle, the pressure cover is sleeved on the outer side of the spindle and located at the front end of the housing, the inner and outer sealing gaskets cooperate with each other and are located between the housing and the spindle, the bushing is disposed between the pressure cover and the spindle, and the sealing nut is disposed on the outer side of the spindle and located at the front end of the bushing. One end of the housing is provided with an air inlet, and the housing is provided with an air inlet channel. The pressure cover is provided with an air supply chamber, and the air inlet communicates with the air supply chamber through the air inlet channel. The front end of the bushing is provided with multiple air distribution holes spaced apart and inclined along its circumference. One end of each air distribution hole communicates with the air supply chamber, and the other end communicates with the spiral air passage formed between the sealing nut and the bushing.

[0005] Furthermore, the inclination angle of the air distribution hole is 10-20°, and it is inclined from the air supply chamber side to the spiral air passage side.

[0006] Furthermore, the bottom of the pressure cap is provided with a drain port that communicates with the spiral air passage.

[0007] Furthermore, the rear end of the inner sealing gasket abuts against the bearing disposed between the housing and the main shaft, and the front end of the outer sealing gasket abuts against the gland.

[0008] Furthermore, the inner sealing gasket has an inverted L-shaped groove at its front end and an L-shaped groove at its rear end, and the inverted L-shaped groove and the L-shaped groove engage with each other.

[0009] Furthermore, the sealing nut has a flange at its front end that protrudes above the spiral air passage.

[0010] Furthermore, a sealing stud is provided at the top of the air supply chamber.

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

[0012] This invention, through the design of an air inlet, an air supply chamber, an air distribution hole, and a spiral air passage, allows airflow to be introduced to the connection between the front end of the spindle and the pressure cover, creating an air curtain effect. This prevents external moisture and impurities from entering the spindle, thereby ensuring the long-term stable operation of the spindle. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the embodiments 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 based on these drawings without creative effort.

[0014] Figure 1 This is an axial structural cross-sectional view of the present invention;

[0015] Figure 2 for Figure 1 A partial structural diagram at point A in the middle;

[0016] Figure 3 for Figure 2 A schematic diagram of the local structure at point B.

[0017] Figure label:

[0018] 1-Housing, 2-Gland, 3-Inner sealing gasket, 4-Outer sealing gasket, 5-Bushing, 6-Sealing nut, 7-Main shaft, 8-Air inlet, 9-Air inlet channel, 10-Air supply chamber, 11-Air distribution hole, 12-Spiral air passage, 13-Drain outlet, 14-Sealing stud, 15-Flange, 16-Bearing, 17-Inverted L-shaped groove, 18-L-shaped groove. 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] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0021] Furthermore, the use of terms such as "first" and "second" in this utility model is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features.

[0022] In the description of the embodiments, unless otherwise expressly specified and limited, the terms "set," "connect," etc., should be interpreted broadly. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or a connection through an intermediate medium, or it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0023] like Figure 1 As shown, the air curtain protection waterproof structure for the machine tool spindle in this embodiment includes a housing 1, a pressure cover 2, an inner sealing gasket 3, an outer sealing gasket 4, a bushing 5, and a sealing nut 6. The housing 1 is fitted onto the front end of the spindle 7. The pressure cover 2 is fitted onto the outside of the spindle 7 and located at the front end of the housing 1. The inner sealing gasket 3 and the outer sealing gasket 4 cooperate with each other and are located between the housing 1 and the spindle 7. The bushing 5 is located between the pressure cover 2 and the spindle 7. The sealing nut 6 is located on the outside of the spindle 7 and at the front end of the bushing 5.

[0024] like Figure 2-3 As shown, the housing 1 has an air inlet 8 at one end and an air intake channel 9 inside. The pressure cap 2 has an air supply chamber 10 inside. The air inlet 8 is connected to the air supply chamber 10 through the air intake channel 9. The bushing 5 has multiple air distribution holes 11 spaced apart and inclined along its circumference at its front end. One end of the air distribution hole 11 is connected to the air supply chamber 10, and the other end is connected to the spiral air passage 12 formed between the sealing nut 6 and the bushing 5. The inclination angle of the air distribution hole 11 is 10-20°, and it is inclined from the air supply chamber 10 side to the spiral air passage 12 side.

[0025] The bottom of the pressure cap 2 is provided with a drain outlet 13 that communicates with the spiral air passage 12, the top of the air supply chamber 10 is provided with a sealing stud 14, and the front end of the sealing nut 6 is provided with a flange 15 that extends beyond the spiral air passage 12.

[0026] The rear end of the inner sealing gasket 3 abuts against the bearing 16 located between the housing 1 and the main shaft 7, and the front end of the outer sealing gasket 4 abuts against the pressure cap 2; the front end of the inner sealing gasket 3 is provided with an inverted L-shaped groove 17, and the rear end of the outer sealing gasket 4 is provided with an L-shaped groove 18, and the inverted L-shaped groove 17 and the L-shaped groove 18 are engaged with each other.

[0027] The working principle of this utility model is as follows:

[0028] High-pressure gas is introduced into the housing 1 through the air inlet 8. The high-pressure gas enters the air supply chamber 10 through the air inlet channel 9, and then enters the spiral air passage 12 through multiple air distribution holes 11. Finally, it is discharged from the gap at the front end of the sealing nut 6, so that the front end of the spindle 7 creates an air curtain effect, ensuring that external moisture and impurities cannot enter the spindle 7. In addition, the moisture remaining in the gap between the spindle 7 and the housing 1 will be discharged from the drain port 13 at the bottom of the pressure cover 2, thereby ensuring the long-term stable operation of the spindle.

[0029] The flange 15 at the front end of the sealing nut 6 can act as a shield, further improving the dustproof and waterproof effect of the spindle 7, and preventing cutting fluid from splashing into the spindle 7 during machine tool processing.

[0030] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope claimed by this utility model.

Claims

1. A waterproof structure for air curtain protection of a machine tool spindle, characterized in that: The device includes a housing, a gland, an inner sealing gasket, an outer sealing gasket, a bushing, and a sealing nut. The housing is fitted onto the outer front end of the main shaft. The gland is fitted onto the outer side of the main shaft and located at the front end of the housing. The inner and outer sealing gaskets cooperate with each other and are located between the housing and the main shaft. The bushing is located between the gland and the main shaft. The sealing nut is located on the outer side of the main shaft and at the front end of the bushing. One end of the housing has an air inlet, and the housing has an air intake channel. The gland has an air supply chamber inside, and the air inlet communicates with the air supply chamber through the air intake channel. The front end of the bushing has multiple air distribution holes spaced apart and inclined along its circumference. One end of each air distribution hole communicates with the air supply chamber, and the other end communicates with the spiral air passage formed between the sealing nut and the bushing.

2. The air curtain protection and waterproof structure for machine tool spindles according to claim 1, characterized in that: The air distribution hole has an inclination angle of 10-20° and is inclined from the air supply chamber side to the spiral air passage side.

3. The air curtain protection and waterproof structure for machine tool spindles according to claim 1, characterized in that: The bottom of the pressure cap is provided with a drain port that communicates with the spiral air passage.

4. The air curtain protection and waterproof structure for machine tool spindles according to claim 1, characterized in that: The rear end of the inner sealing gasket abuts against the bearing disposed between the housing and the main shaft, and the front end of the outer sealing gasket abuts against the gland.

5. The air curtain protection and waterproof structure for machine tool spindles according to claim 4, characterized in that: The inner sealing gasket has an inverted L-shaped groove at its front end and the outer sealing gasket has an L-shaped groove at its rear end. The inverted L-shaped groove and the L-shaped groove are engaged with each other.

6. The air curtain protection and waterproof structure for machine tool spindles according to claim 1, characterized in that: The sealing nut has a flange at its front end that protrudes above the spiral air passage.

7. The air curtain protection and waterproof structure for machine tool spindles according to claim 1, characterized in that: The top of the air supply chamber is equipped with a sealing stud.

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