Rotary table and machine tool

Abstract

The utility model discloses a rotary table and a machine tool, which comprise a machine body provided with an air guide seat, the air guide seat extends from a first end to a second end along the axial direction, the first end is connected with the machine body, the second end is provided with a rotating shaft matching hole, the air guide seat is provided with a first air guide hole and a second air guide hole, and the first air guide hole forms a friction static ring mounting port at the axis position; the second air guide hole extends to the hole wall of the rotating shaft matching hole; the rotating disc is provided with a rotating shaft, the rotating shaft extends into the rotating shaft matching hole, the rotating shaft is provided with a first air channel and a second air channel, the first air channel extends along the axis of the rotating shaft and forms a friction moving ring mounting opening, and the second air channel extends to the peripheral surface of the rotating shaft and is communicated with the second air guide hole; and the rotary sealing structure comprises a friction static ring and a friction moving ring, and the friction static ring and the friction moving ring are in butt joint and are communicated with the first air guide hole and the first air channel. And negative pressure and positive pressure blow-by is avoided, the possibility that pollutants enter the interior is prevented, and the reliability is greatly improved.

Description

Technical Field

[0001] The utility model is used in the field of processing equipment, in particular to a turntable and a machine tool. Background Art

[0002] In the machining of mechanical parts, some turning-milling compound turntables need to achieve high-speed rotation to realize the turning function, and some compound fixtures need to provide positive pressure loosening and clamping as well as negative pressure clamping and loosening and clamping. Usually, the gas path adopts contact sealing in the form of O-rings or non-contact micro-gap sealing. The life of this seal is limited by the life of the seal and it is easy to be damaged. In addition, negative pressure and positive pressure cross-talk are inevitable. During the use of negative pressure fixtures, it is impossible to avoid defects such as external contaminants connecting with the inside of the turntable. Utility Model Content

[0003] The purpose of the utility model is to solve at least one of the technical problems existing in the prior art, and to provide a turntable and a machine tool, which avoid the possibility of negative pressure and positive pressure mixing and prevent pollutants from entering the interior, thereby greatly improving reliability.

[0004] The technical solution adopted by the utility model to solve its technical problems is:

[0005] In a first aspect, a turntable comprises:

[0006] The body is provided with an air guide seat, the air guide seat extends axially from the first end to the second end, the first end is connected to the body, the second end is provided with a rotating shaft matching hole extending toward the first end, the air guide seat is provided with a first air guide hole and a second air guide hole, the first air guide hole extends to the bottom of the rotating shaft matching hole, and forms a friction stationary ring installation port at the axial center, and the second air guide hole extends to the hole wall of the rotating shaft matching hole;

[0007] A rotating disk is provided with a rotating shaft, the rotating shaft extends axially into the rotating shaft matching hole, the rotating shaft is provided with a first air channel and a second air channel, the first air channel extends along the axis of the rotating shaft and forms a friction ring mounting opening at one end facing the bottom of the rotating shaft matching hole, the second air channel extends to the outer peripheral surface of the rotating shaft and is in communication with the second air guide hole;

[0008] The rotary sealing structure comprises a friction static ring and a friction dynamic ring, wherein the friction static ring is arranged at the friction static ring mounting opening, and the friction dynamic ring is arranged at the friction dynamic ring mounting opening, the friction static ring and the friction dynamic ring are butt-jointed, and the first air guide hole and the first air passage are connected.

[0009] In combination with the first aspect, in certain implementations of the first aspect, the friction static ring is floatingly inserted into the friction static ring installation opening, and an elastic component is provided between the friction static ring and the air guide seat.

[0010] In combination with the first aspect and the above-mentioned implementations, in some implementations of the first aspect, the elastic component includes a compression spring, which is sleeved on the outside of the friction static ring, one end of the compression spring abuts against the air guide seat, and the other end of the compression spring abuts against the flange at the end of the friction static ring.

[0011] In combination with the first aspect and the above implementations, in some implementations of the first aspect, the following further includes:

[0012] The compensating sleeve is sleeved on the outer circumference of the rotating shaft, and the outer circumference of the compensating sleeve is in contact with the hole wall of the matching hole of the rotating shaft.

[0013] In combination with the first aspect and the above-mentioned implementation methods, in certain implementation methods of the first aspect, the inner circumferential surface of the compensation sleeve is provided with an inner annular groove connected to the second air duct, and the outer circumferential surface of the compensation sleeve is provided with an outer annular groove connected to the second air guide hole, and the inner annular groove and the outer annular groove are connected through an air hole.

[0014] In combination with the first aspect and the above-mentioned implementations, in certain implementations of the first aspect, the compensation sleeve is installed on the outer circumferential surface of the rotating shaft through a bearing, and a sealing ring is provided between the compensation sleeve and the hole wall of the matching hole of the rotating shaft.

[0015] In combination with the first aspect and the above-mentioned implementations, in certain implementations of the first aspect, a dynamic ring mounting seat is provided at the end of the rotating shaft, the first air channel extends along the axis of the rotating shaft to the end face of the dynamic ring mounting seat, and the friction dynamic ring mounting port is formed at the end.

[0016] In combination with the first aspect and the above-mentioned implementations, in some implementations of the first aspect, the air guide seat is provided with a plurality of second air guide holes, and the rotating shaft is provided with a plurality of second air channels communicating with the second air guide holes.

[0017] In combination with the first aspect and the above-mentioned implementations, in some implementations of the first aspect, the rotating shaft has an outer end surface flush with the rotating disk, and the first air channel and the second air channel form an interface on the outer end surface.

[0018] In a second aspect, a machine tool comprises a turntable as described in any implementation of the first aspect.

[0019] One of the above technical solutions has at least one of the following advantages or beneficial effects: In the technical solution of the utility model, the first air path for providing power to the turntable is formed between the machine body and the rotating disk through the first air guide hole and the first air channel, and the second air path for providing power to the turntable is formed between the machine body and the rotating disk through the second air guide hole and the second air channel, wherein the first air guide hole and the first air channel rotate relative to each other through the friction static ring and the friction dynamic ring, and the first air path is completely isolated from the external environment and the internal environment through the friction ring, so that the first air path is prevented from leaking during the transportation process, and the possibility of negative pressure and positive pressure gas cross-talk is avoided and pollutants are prevented from entering the interior, which greatly improves reliability. And the feasible space is greatly utilized to achieve the purpose of compact structure.

[0020] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0022] Figure 1 It is a schematic structural diagram of an embodiment of the utility model. DETAILED DESCRIPTION

[0023] This section will describe in detail the specific embodiments of the utility model. The preferred embodiments of the utility model are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the utility model, but it cannot be understood as a limitation on the protection scope of the utility model.

[0024] In the present invention, if directions (up, down, left, right, front and back) are described, it is only for the convenience of describing the technical solution of the present invention, and does not indicate or imply that the technical features referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, it cannot be understood as a limitation on the present invention.

[0025] In the present utility model, "several" means one or more, "multiple" means more than two, "greater than", "less than", "exceed" and the like are understood to exclude the number itself; "above", "below", "within" and the like are understood to include the number itself. In the description of the present utility model, if there is a description of "first" or "second", it is only used for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0026] In the present invention, unless otherwise clearly defined, the words "set", "install", "connect" and the like should be understood in a broad sense, for example, they can be directly connected or indirectly connected through an intermediate medium; they can be fixedly connected or detachably connected or integrally formed; they can be mechanically connected or electrically connected or able to communicate with each other; they can be the internal connection of two elements or the interaction relationship between two elements. Those skilled in the art can reasonably determine the specific meanings of the above words in the present invention in combination with the specific content of the technical solution.

[0027] See also Figure 1 An embodiment of the utility model provides a turntable, including a body 100 , a rotating disk 200 and a rotating sealing structure 300 .

[0028] The turntable can be driven by an internal motor or an external motor. For example, in some embodiments, the body 100 is provided with a stator, the rotating disk 200 is provided with a shaft core, and the shaft core is provided with a rotor, and the rotating disk 200 rotates under the drive of the internal motor. A water jacket is provided inside the body to better dissipate heat from the motor stator.

[0029] For details, see Figure 1 The body 100 is provided with an air guide seat 101, which extends axially from a first end to a second end. The first end is connected to the body 100, and the second end is provided with a rotating shaft matching hole 102 extending toward the first end. The rotating shaft matching hole 102 is terminated before extending to the first end. The air guide seat 101 is provided with a first air guide hole 103 and a second air guide hole 104. The first air guide hole 103 extends to the bottom of the rotating shaft matching hole 102, and forms a friction stationary ring installation port 105 at the axial center position. The second air guide hole 104 extends to the hole wall of the rotating shaft matching hole 102.

[0030] The rotating disk 200 serves as the rotating part of the turntable. The rotating disk 200 is provided with a rotating shaft 201. The rotating shaft 201 is located at the axis center of the rotating disk 200. The rotating shaft 201 is installed on the axis core 202 of the turntable. The rotating shaft 201 extends axially into the matching hole 102 of the rotating shaft 201. The rotating shaft 201 is provided with a first air channel 203 and a second air channel 204. The first air channel 203 extends along the axis of the rotating shaft 201, and forms a friction ring mounting port 205 at one end facing the bottom of the matching hole 102 of the rotating shaft 201. The second air channel 204 extends to the outer peripheral surface of the rotating shaft 201 and is connected to the second air guide hole 104.

[0031] The rotary sealing structure 300 includes a friction static ring 301 and a friction dynamic ring 302. The friction static ring 301 is arranged at the friction static ring installation port 105, and the friction dynamic ring 302 is arranged at the friction dynamic ring installation port 205. The friction static ring 301 and the friction dynamic ring 302 are connected and connect the first air guide hole 103 and the first air channel 203.

[0032] In the technical solution of the utility model, a first air path, such as a positive pressure air path, is formed between the machine body 100 and the rotating disk 200 through the first air guide hole 103 and the first air channel 203 to provide power for the turntable, and a second air path, such as a negative pressure air path, is formed between the machine body 100 and the rotating disk 200 through the second air guide hole 104 and the second air channel 204 to provide power for the turntable. The second air path is introduced into the friction dynamic ring 302 through the friction static ring 301 and directly reaches the center of the rotating shaft 201 to realize a negative pressure and large flow air path to the turntable, and the negative pressure clamp realizes negative pressure loosening or clamping. Among them, the first air guide hole 103 and the first air channel 203 are fitted together by the friction static ring 301 and the friction dynamic ring 302 to perform relative movement and rotation. The first air path is completely isolated from the external environment and the internal environment through the friction ring, so that the first air path can avoid leakage during the transportation process, avoid the possibility of negative pressure and positive pressure mixing and prevent pollutants from entering the interior, which greatly improves the reliability. By adopting a reliable composite friction ring seal, the reliability is greatly improved compared with conventional pure contact seals or pure gap seals, and the feasible space is greatly utilized to achieve the purpose of compact structure.

[0033] The static friction ring 301 and the dynamic friction ring 302 can be made of metal or composite materials. When made of composite materials, the static friction ring 301 and the dynamic friction ring 302 rotate relative to each other through the bonding of the composite materials, which reduces friction loss, reduces the overall load, and allows the rotating parts to operate smoothly.

[0034] In some embodiments, see Figure 1 The friction static ring 301 is floatingly inserted into the friction static ring installation port 105. An elastic component is provided between the friction static ring 301 and the air guide seat 101. The friction static ring 301 is pre-tightened by the elastic component, and the friction dynamic ring 302 fits with the friction static ring 301 to achieve a better sealing effect.

[0035] For further information, see Figure 1 The elastic component includes a compression spring 303, which is sleeved on the outer side of the friction static ring 301, one end of the compression spring 303 abuts against the air guide seat 101, and the other end of the compression spring 303 abuts against the flange at the end of the friction static ring 301. The compression spring 303 acts on the friction static ring 301, which can compensate for the wear of the friction dynamic ring 302 and the friction static ring 301, so that the friction dynamic ring 302 and the friction static ring 301 fit together to achieve a sealing effect.

[0036] In some embodiments, see Figure 1 The turntable further includes a compensation sleeve 400, which is sleeved on the outer circumference of the rotating shaft 201, and the outer circumference of the compensation sleeve 400 is in contact with the hole wall of the matching hole 102 of the rotating shaft 201. The compensation sleeve 400 is arranged between the rotating shaft 201 and the air guide seat 101, and plays a radial limiting role to avoid jamming.

[0037] For further information, see Figure 1 The inner circumference of the compensation sleeve 400 is provided with an inner ring groove 401 which is in communication with the second air channel 204, and the outer circumference of the compensation sleeve 400 is provided with an outer ring groove 402 which is in communication with the second air guide hole 104, and the inner ring groove 401 and the outer ring groove 402 are connected through the air hole. The second air route is transmitted from the air guide seat 101 to the compensation sleeve 400, through the outer ring groove 402, the air hole and the inner ring groove 401, and then to the rotating shaft 201, which is introduced into the turntable to provide the positive pressure required for the clamp to loosen or clamp. In this embodiment, the rotating shaft 201 and the air guide seat 101 are different from conventional O-rings, and adopt micro-gap sealing, which is contactless, reduces friction, reduces the overall load, and makes the rotating parts run more smoothly.

[0038] For further information, see Figure 1 The compensation sleeve 400 is installed on the outer circumference of the rotating shaft 201 through a bearing. A sealing ring 403 is provided between the compensation sleeve 400 and the hole wall of the matching hole 102 of the rotating shaft 201. The sealing ring 403 plays a sealing role and compensates for the longitudinal deviation to prevent jamming.

[0039] In some embodiments, see Figure 1 The end of the rotating shaft 201 is provided with a dynamic ring mounting seat 206, which is arranged outside the end surface of the compensation sleeve 400. The first air channel 203 extends along the axis of the rotating shaft 201 to the end surface of the dynamic ring mounting seat 206, and forms a friction dynamic ring mounting port 205 at the end. In this embodiment, the dynamic ring mounting seat 206 is provided to facilitate the positioning and installation of the compensation sleeve 400 on the rotating shaft 201, and improve the installation stability of the friction dynamic ring 302.

[0040] In some embodiments, see Figure 1 The air guide seat 101 is provided with a plurality of second air guide holes 104 , the rotating shaft 201 is provided with a plurality of second air channels 204 communicating with the second air guide holes 104 , and the plurality of second air guide holes 104 and the second air channels 204 form a plurality of second air paths.

[0041] See also Figure 1 The rotating shaft 201 has an outer end surface flush with the rotating disk 200, and the first air channel 203 and the second air channel 204 form an interface on the outer end surface, which is convenient for connection with the fixture on the turntable.

[0042] An embodiment of the utility model further provides a machine tool, comprising the turntable in any one of the above embodiments.

[0043] In the description of this specification, the description with reference to the terms "example", "embodiment" or "some embodiments" 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.

[0044] Of course, the invention is not limited to the above-mentioned embodiments, and those skilled in the art may make equivalent modifications or substitutions without violating the spirit of the invention, and these equivalent modifications or substitutions are all included in the scope defined by the claims of this application.

Claims

1. A turntable, characterized in that: include: The body is provided with an air guide seat, the air guide seat extends axially from the first end to the second end, the first end is connected to the body, the second end is provided with a rotating shaft matching hole extending toward the first end, the air guide seat is provided with a first air guide hole and a second air guide hole, the first air guide hole extends to the bottom of the rotating shaft matching hole, and forms a friction stationary ring installation port at the axial center, and the second air guide hole extends to the hole wall of the rotating shaft matching hole; A rotating disk is provided with a rotating shaft, the rotating shaft extends axially into the rotating shaft matching hole, the rotating shaft is provided with a first air channel and a second air channel, the first air channel extends along the axis of the rotating shaft and forms a friction ring mounting opening at one end facing the bottom of the rotating shaft matching hole, the second air channel extends to the outer peripheral surface of the rotating shaft and is in communication with the second air guide hole; The rotary sealing structure comprises a friction static ring and a friction dynamic ring, wherein the friction static ring is arranged at the friction static ring mounting opening, and the friction dynamic ring is arranged at the friction dynamic ring mounting opening, the friction static ring and the friction dynamic ring are butt-jointed, and the first air guide hole and the first air passage are connected.

2. The turntable according to claim 1, characterized in that: The friction static ring is inserted in the friction static ring installation opening in a floating manner, and an elastic component is arranged between the friction static ring and the air guide seat.

3. The turntable according to claim 2, characterized in that: The elastic component comprises a compression spring, which is sleeved on the outer side of the friction static ring, one end of the compression spring abuts against the air guide seat, and the other end of the compression spring abuts against the flange at the end of the friction static ring.

4. The turntable according to claim 1, characterized in that: Also includes: The compensating sleeve is sleeved on the outer circumference of the rotating shaft, and the outer circumference of the compensating sleeve is in contact with the hole wall of the matching hole of the rotating shaft.

5. The turntable according to claim 4, characterized in that: The inner circumference of the compensation sleeve is provided with an inner annular groove communicating with the second air channel, and the outer circumference of the compensation sleeve is provided with an outer annular groove communicating with the second air guide hole, and the inner annular groove and the outer annular groove are connected through an air hole.

6. The turntable according to claim 4, characterized in that: The compensation sleeve is installed on the outer peripheral surface of the rotating shaft through a bearing, and a sealing ring is arranged between the compensation sleeve and the hole wall of the matching hole of the rotating shaft.

7. The turntable according to claim 4, characterized in that: A dynamic ring mounting seat is provided at the end of the rotating shaft, the first air channel extends along the axis of the rotating shaft to the end surface of the dynamic ring mounting seat, and the friction dynamic ring mounting port is formed at the end.

8. The turntable according to claim 1, characterized in that: The air guide seat is provided with a plurality of second air guide holes, and the rotating shaft is provided with a plurality of second air passages communicating with the second air guide holes.

9. The turntable according to claim 1, characterized in that: The rotating shaft has an outer end surface flush with the rotating disk, and the first air channel and the second air channel form an interface on the outer end surface.

10. A machine tool, characterized in that: The invention comprises the turntable according to any one of claims 1 to 9.

Images