Numerical control rotary table surface sealing structure

Abstract

The utility model relates to a numerical control rotary table surface sealing structure, which belongs to the technical field of numerical control rotary tables and comprises a rotary table body and a rotary table surface arranged on the rotary table body, at least one U-shaped ring groove is arranged on the side wall of the rotary table body, the U-shaped ring groove and the rotary table surface form a labyrinth sealing structure, and a drainage ring groove is arranged on the upper end face of the rotary table body. A drainage ring groove is formed in the rotary table body, a first drainage channel is formed in the drainage ring groove, a second drainage channel communicated with the lower end of the first drainage channel is formed in the rotary table body, and the other end of the second drainage channel extends to the side wall of the rotary table body and is connected with an air pipe connector. Meanwhile, the drainage ring groove is additionally formed in the end face, liquid such as cooling liquid or cutting liquid generated in the working process can be rapidly drained out, the situation that internal parts such as a bearing and an end-toothed disc are rusted and precision is reduced due to liquid accumulation is prevented, and the defect that labyrinth sealing cannot completely prevent water vapor leakage is overcome.

Description

Technical Field

[0001] The utility model belongs to the technical field of numerical control turntables, and in particular relates to a disk sealing structure of a numerical control turntable. Background Art

[0002] With the continuous improvement of the precision and complexity of parts in the fields of aerospace, automobile manufacturing, mold processing, energy equipment, etc., more flexible and efficient CNC machine tool multi-angle rotation processing technology is needed. As a key component, the CNC turntable can realize the precise rotation and positioning of the workpiece in multiple degrees of freedom, thereby realizing the precise processing of complex workpieces and angles. One of the core components inside the CNC turntable is the high-precision bearing, which bears the radial load of the fixture shaft. The coolant, cutting fluid or other liquids generated in actual use will be sprayed onto the CNC turntable body in large quantities. In order to keep the inside of the CNC turntable clean and prevent the liquid from affecting the operation of the turntable, a sealing measure will be set between the turntable body and the rotating disk. This time, the seal between the CNC turntable body and the disk surface adopts a labyrinth-type and an optimized design with added drainage grooves to ensure long-term stable and precise operation of the equipment.

[0003] At present, there are many CNC turntables used in horizontal machining centers and horizontal special machine tools among machine tools, and CNC turntables are all core components, and their internal core components are worm gears, end gear discs and high-precision radial bearings. In actual use, there will be a large amount of cutting fluid spraying, so the water vapor content in the use environment is very high. After the CNC turntable has been used in this environment for a period of time, the motor load will be too high and the positioning will be inaccurate. The existing technology is to install a new type of ring on the CNC turntable body to contact and seal with the rotating disk surface, but because the seal is made of plastic material, it will wear and age in an environment with a large amount of cutting fluid, which will cause water vapor to enter the turntable body and affect the service life of the bearings, end gear discs and worm gears, resulting in a higher maintenance frequency and increasing the maintenance cost of users.

[0004] The labyrinth seal design is changed to the CNC turntable body to reduce the probability of water vapor entering the turntable body. At the same time, a drainage groove is added on the end surface to quickly discharge the coolant or cutting fluid generated during work to prevent the accumulation of liquids from causing rust and precision reduction of internal parts such as bearings and end gears, and to prevent abnormal wear during the rotation of the worm gear. Improving the seal design and adding a drainage structure can further improve the reliability and service life of the CNC turntable. Utility Model Content

[0005] In order to solve the above technical problems, the utility model further provides a sealing structure for a disk surface of a numerically controlled turntable.

[0006] The specific technical scheme of the utility model is as follows: a CNC turntable disk sealing structure, including a turntable body and a turntable disk arranged on the turntable body, the side wall of the turntable body is provided with at least one U-shaped ring groove, the U-shaped ring groove and the turntable disk form a labyrinth sealing structure, the upper end surface of the turntable body is provided with a drainage ring groove, the drainage ring groove is provided with a first drainage channel, the turntable body is provided with a second drainage channel connected to the lower end of the first drainage channel, the other end of the second drainage channel extends to the side wall of the turntable body and is connected to a trachea joint.

[0007] Furthermore, the cross section of the drainage annular groove is a trapezoid, and at least one hypotenuse angle of the trapezoid is 45°.

[0008] Furthermore, guide slopes are provided on the bottom surface of the drainage ring groove and are located on both sides of the first drainage channel for guiding water to the first drainage channel.

[0009] Furthermore, the opening of the U-shaped annular groove is oriented horizontally.

[0010] Furthermore, the opening of the U-shaped annular groove is oriented obliquely downward.

[0011] Furthermore, an auxiliary drainage channel is provided in the turntable body, one end of the auxiliary drainage channel is communicated with the U-shaped annular groove, and the other end of the auxiliary drainage channel is communicated with the first drainage channel or the second drainage channel.

[0012] Furthermore, the first drainage channel is arranged in a direction that intersects with the rotation axis of the turntable body.

[0013] Furthermore, the second drainage channel is disposed horizontally or inclined downwardly.

[0014] Beneficial effects:

[0015] The present application changes the turntable body into a labyrinth seal design, which is frictionless and has a long service life, reduces the probability of water vapor entering the turntable body, and adds a drainage ring groove on the end face, which can quickly discharge the coolant or cutting fluid generated during work, prevent the accumulation of liquids and cause internal parts such as bearings and end gears to rust and reduce precision, etc., make up for the shortcomings of the labyrinth seal that cannot completely prevent water vapor leakage, and prevent abnormal wear during the rotation of the worm gear. Improving the seal design and adding a drainage structure can further improve the reliability and service life of the CNC turntable. The cross-section of the drainage ring groove is a trapezoid, and at least one of the trapezoidal hypotenuses is 45°, which is conducive to the inflow of water vapor and the outflow of the body. The optimization of the structure of the present application prevents the internal parts of the CNC turntable from being contaminated with water vapor, resulting in grease emulsification, and prolongs the service life of the parts. At the same time, the setting of the drainage ring groove is equivalent to secondary protection. Because the use environment is relatively humid, some water vapor will inevitably pass through the labyrinth seal, enter the drainage ring groove, and then be discharged from the body. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the utility model;

[0017] Figure 2 For this utility model Figure 1 A partial enlarged view of middle A;

[0018] Figure 3 This is a schematic diagram of the installation position of the U-shaped ring groove of the utility model;

[0019] Figure 4 This is a schematic diagram of the installation position of the U-shaped water retaining ring of the utility model;

[0020] Description of the markings in the figure:

[0021] Turntable body 1, turntable plate 2, U-shaped ring groove 3, drainage ring groove 4, first drainage channel 5, second drainage channel 6, air pipe joint 7, auxiliary drainage channel 8, water retaining ring 9. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] In the description of the present invention, it should be understood that the terms "upper", "middle", "outer", "inner" and the like indicating directions or positional relationships are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as limitations on the present invention.

[0024] Example: Figure 1-Figure 4 As shown, the specific technical solution of the utility model is as follows: a CNC turntable disk sealing structure comprises a turntable body 1 and a turntable disk 2 arranged on the turntable body 1,

[0025] The side wall of the turntable body 1 is provided with at least one U-shaped annular groove 3, and the U-shaped annular groove 3 forms a labyrinth seal structure with the turntable disc 2. The upper end surface of the turntable body 1 is provided with a drainage annular groove 4, and a first drainage channel 5 is provided at the drainage annular groove 4. The turntable body 1 is provided with a second drainage channel 6 connected to the lower end of the first drainage channel 5, and the other end of the second drainage channel 6 extends to the side wall of the turntable body 1 and is connected to a trachea joint 7. The cross section of the drainage annular groove 4 is a trapezoid, and at least one hypotenuse of the trapezoid is 45°. The bottom surface of the drainage annular groove 4 is provided with a guiding inclined surface, which is located on both sides of the first drainage channel 5 and is used to guide water to the first drainage channel 5. The opening of the U-shaped annular groove 3 is oriented in the horizontal direction. The opening of the U-shaped annular groove 3 is oriented in an oblique downward direction. An auxiliary drainage channel 8 is provided in the turntable body 1, and one end of the auxiliary drainage channel 8 is connected to the U-shaped annular groove 3, and the other end of the auxiliary drainage channel 8 is connected to the first drainage channel 5 or the second drainage channel 6. The first drainage channel 5 is arranged in a direction that intersects with the rotation axis of the turntable body 1. The second drainage channel 6 is arranged in a horizontal direction or in a downwardly inclined direction.

[0026] Among them, the open end of the U-shaped ring groove 3 is set horizontally or tilted downward, which can effectively block the entry of water vapor or water flow. At the same time, the closed end of the U-shaped ring groove 3 is semicircular, which is easy to guide water out of the main body. A water retaining ring 9 is provided on the lower end surface of the turntable disk 2. The water retaining ring 9 is located above the drainage ring groove 4 and is used to prevent water vapor from entering the interior of the turntable body 1. The water retaining ring 9 can be multiple, coaxially arranged on the lower end surface of the turntable disk 2, or alternately arranged on the lower end surface of the turntable disk 2 and the upper end surface of the turntable body 1 to form a labyrinth seal. There are multiple first drainage channels 5, and the upper end is connected to the drainage ring groove 4 to guide water vapor to the second drainage channel 6, and guide it to the outside of the main body through the second drainage channel 6. The auxiliary drainage channel 8 is used to discharge the water vapor entering the U-shaped ring groove 3 through the gap between the turntable body 1 and the turntable disk 2 through the auxiliary drainage channel 8 into the first drainage channel 5 and the second drainage channel 6 to be discharged out of the main body.

[0027] The present application changes the turntable body into a labyrinth seal design, which is frictionless and has a long service life, reduces the probability of water vapor entering the turntable body, and adds a drainage ring groove on the end face, which can quickly discharge the coolant or cutting fluid generated during work, prevent the accumulation of liquids and cause internal parts such as bearings and end gears to rust and reduce precision, etc., make up for the shortcomings of the labyrinth seal that cannot completely prevent water vapor leakage, and prevent abnormal wear during the rotation of the worm gear. Improving the seal design and adding a drainage structure can further improve the reliability and service life of the CNC turntable. The cross-section of the drainage ring groove is a trapezoid, and at least one of the trapezoidal hypotenuses is 45°, which is conducive to the inflow of water vapor and the outflow of the body. The optimization of the structure of the present application prevents the internal parts of the CNC turntable from being contaminated with water vapor, resulting in grease emulsification, and prolongs the service life of the parts. At the same time, the setting of the drainage ring groove is equivalent to secondary protection. Because the use environment is relatively humid, some water vapor will inevitably pass through the labyrinth seal, enter the drainage ring groove, and then be discharged from the body.

[0028] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0029] The preferred embodiments of the utility model disclosed above are only used to help explain the utility model. The preferred embodiments do not describe all the details in detail, nor do they limit the utility model to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the utility model, so that technicians in the relevant technical field can well understand and use the utility model. The utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A CNC turntable disk sealing structure, comprising a turntable body (1) and a turntable disk (2) arranged on the turntable body (1), characterized in that: The side wall of the turntable body (1) is provided with at least one U-shaped annular groove (3), and the U-shaped annular groove (3) and the turntable disc (2) form a labyrinth seal structure. The upper end surface of the turntable body (1) is provided with a drainage annular groove (4), and a first drainage channel (5) is provided at the drainage annular groove (4). The turntable body (1) is provided with a second drainage channel (6) connected to the lower end of the first drainage channel (5), and the other end of the second drainage channel (6) extends to the side wall of the turntable body (1) and is connected to a gas pipe joint (7).

2. The CNC turntable disk sealing structure according to claim 1, characterized in that: The cross section of the drainage annular groove (4) is a trapezoid, and at least one hypotenuse angle of the trapezoid is 45°.

3. The CNC turntable disk sealing structure according to claim 1, characterized in that: The bottom surface of the drainage annular groove (4) is provided with guiding inclined surfaces, which are located on both sides of the first drainage channel (5) and are used to guide water to the first drainage channel (5).

4. The CNC turntable disk sealing structure according to claim 1, characterized in that: The opening of the U-shaped annular groove (3) is oriented in a horizontal direction.

5. The CNC turntable disk sealing structure according to claim 1, characterized in that: The opening of the U-shaped annular groove (3) is oriented obliquely downward.

6. A CNC turntable disk sealing structure according to claim 4 or 5, characterized in that: An auxiliary drainage channel (8) is provided in the turntable body (1); one end of the auxiliary drainage channel (8) is connected to the U-shaped annular groove (3); and the other end of the auxiliary drainage channel (8) is connected to the first drainage channel (5) or the second drainage channel (6).

7. The CNC turntable disk sealing structure according to claim 1, characterized in that: The first drainage channel (5) is arranged in a direction that intersects with the rotation axis of the turntable body (1).

8. The CNC turntable disk sealing structure according to claim 1, characterized in that: The second drainage channel (6) is arranged in a horizontal direction or in a downwardly inclined direction.

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