Air floating shaft

Abstract

The utility model discloses an air floating shaft which comprises a movable sleeve, a shaft core, a reflection structure and a detector. A plurality of air guide holes are formed in the circumferential face of the movable sleeve in a penetrating mode and used for introducing positive air pressure into the movable sleeve. The shaft core is movably arranged in the movable sleeve, a gap exists between the shaft core and the movable sleeve, the shaft core is provided with a first end and a second end which are opposite to each other, and when the shaft core is arranged in the movable sleeve, the first end and the second end extend out of the movable sleeve. The reflection structure is fixedly arranged on the shaft core, located on the outer side of the movable sleeve and close to the first end relative to the second end. The detector is arranged at the end, close to the second end, of the movable sleeve and used for emitting detection light. According to the air floating shaft, the detection light rays emitted by the detector penetrate through the gap and are emitted to the reflection structure, the reflection structure reflects the detection light rays towards the product, and therefore interference of dust on the detection light rays can be reduced, and the effect of improving the detection precision of the detector is achieved.

Description

Technical Field

[0001] The present application relates to the technical field of transmission shafts, and in particular to air-floating shafts. Background Art

[0002] In cutting equipment, a rotating shaft is generally required to drive the blade to rotate so that the blade can cut the material. In order to improve the cutting accuracy, the relative position between the blade and the product needs to be detected. Usually, a detector is set on the side of the rotating shaft close to the blade to detect the distance between the rotating shaft and the product, so as to obtain the relative position between the blade and the product.

[0003] However, since the detector has a certain size, when it is placed close to the blade, it is easy to cause visual obstruction to the observation of the blade. In order to avoid visual obstruction, the detector is placed away from the blade. When the detector is placed away from the blade, the detection error of the detector is easily increased due to the poor cutting environment of the cutting equipment in dusty environments. Therefore, the existing rotating shaft has the problem of poor positioning accuracy. Utility Model Content

[0004] The purpose of this application is to provide an air-floating shaft, which solves the problem that when the detector is set far away from the blade, the detection error of the detector is easily increased due to the poor cutting environment of the cutting equipment in dusty environments. Therefore, the existing rotating shaft has the problem of poor positioning accuracy.

[0005] In order to solve the above technical problems, the present application provides an air-floating shaft, including a movable sleeve, a shaft core, a reflective structure and a detector. A plurality of air guide holes are provided through the circumferential surface of the movable sleeve, and the blades of the air guide holes are used to introduce positive air pressure into the movable sleeve. The shaft core is movably arranged in the movable sleeve, and there is a gap between the shaft core and the movable sleeve. The shaft core has a first end and a second end opposite to each other. When the shaft core is arranged in the movable sleeve, the first end and the second end extend outside the movable sleeve respectively. The reflective structure is fixed to the shaft core, and the reflective structure is located on the outside of the movable sleeve and is close to the first end relative to the second end. The detector is arranged at one end of the movable sleeve close to the second end, and the detector is used to emit detection light. The detection light emitted by the detector passes through the gap and is directed to the reflective structure. The reflective structure reflects the detection light toward the outside of the shaft core, and the direction of reflection of the detection light is perpendicular to the axial direction of the shaft core.

[0006] In the above implementation process, the shaft core is inserted into the movable sleeve, and the air guide hole introduces positive air pressure into the movable sleeve, so that the shaft core is suspended in the movable sleeve under the action of the positive air pressure, and the blade is driven to rotate by the shaft core, thereby realizing the function of the air-floating shaft driving the blade to cut the product. The detector is set at the second end, so that the detector emits detection light toward the first end through the gap between the shaft core and the movable sleeve, so that the reflection structure reflects the reflected light to the outside of the shaft core in a direction perpendicular to the shaft core, so that when the air-floating shaft drives the blade to cut the product, the reflection structure reflects the light to the product, thereby realizing the purpose of detecting the relative position between the blade and the product, which helps to improve the cutting accuracy of the product. By setting the detector at the second end, the visual obstruction of the detector to the blade is reduced, so as to facilitate the observation of the working condition of the blade. The detection light emitted by the detector passes through the movable sleeve, which can reduce the interference of dust on the detection light, thereby achieving the effect of improving the detection accuracy of the detector.

[0007] In some embodiments, a voltage regulator tube is arranged in the gap, and the shaft core is arranged in the voltage regulator tube. A plurality of through holes are provided on the circumferential surface of the voltage regulator tube, and the through holes and the air guide holes are arranged in a staggered manner along the radial direction of the movable sleeve. A first air guide groove is respectively provided through the outer circumferential surface and / or the inner circumferential surface of the voltage regulator tube, and the first air guide groove is connected to the plurality of through holes.

[0008] In some embodiments, the first air guide groove extends along the axis of the voltage-stabilizing tube, and the detection light emitted by the detector passes through the first air guide groove.

[0009] In some embodiments, the inner circumferential surface of the voltage-stabilizing tube is provided with a plurality of second air-guiding grooves connected to the through hole, the second air-guiding grooves are arranged in an annular shape, and the axes of the second air-guiding grooves are colinear with the axis of the shaft core.

[0010] In some embodiments, the reflective structure includes a reflective surface fixedly disposed on the shaft core, the reflective surface is closer to the first end than the second end, faces the detector, and is perpendicular to the axis of the shaft core and away from the shaft core. The reflective surface is annular.

[0011] In some embodiments, a positioning plate is sleeved on the shaft core, the positioning plate is close to the first end relative to the second end, a first annular inclined surface is arranged on the side of the positioning plate facing the second end, the first inclined surface faces the second end and the outer side of the shaft core. A reflective layer is arranged on the inclined surface, and the reflective layer forms a reflective surface.

[0012] In some embodiments, a second annular inclined surface is disposed on one side of the positioning plate facing the first end, and the second inclined surface faces the first end and the outer side of the shaft core.

[0013] In some embodiments, there is a gap between the reflective plate and the movable sleeve.

[0014] In some embodiments, the second end is provided with a magnetic pole.

[0015] In some embodiments, the detector is a laser ranging sensor.

[0016] Compared with the prior art, the beneficial effects of the present application are: providing an air-floating shaft, wherein a detector is arranged at the second end, thereby reducing the visual obstruction of the detector to the blade, so as to facilitate observation of the working condition of the blade; and the detection light emitted by the detector passes through the movable sleeve, which can reduce the interference of dust on the detection light, thereby achieving the effect of improving the detection accuracy of the detector. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0018] Figure 1 This is a schematic diagram of the structure of an air floating shaft according to an embodiment of the present application;

[0019] Figure 2 This is a schematic diagram of the working state of the air floating shaft in one embodiment of the present application;

[0020] Figure 3 is a side view of an air floating shaft according to an embodiment of the present application;

[0021] Figure 4 yes Figure 2 A local enlarged view of point A;

[0022] Figure 5 It is a side view of a voltage regulator tube of an air-floating shaft according to an embodiment of the present application;

[0023] Figure 6 yes Figure 5 Schematic diagram of the structure of the Zener tube after being cut along the IV-IV cutting line.

[0024] Explanation of the main component symbols: 1. Movable sleeve; 11. Air guide hole; 2. Axis core; 20. Gap; 21. First end; 22. Second end; 23. Magnetic pole; 3. Reflection structure; 31. Reflection surface; 4. Detector; 41. Detection light; 5. Voltage regulator; 51. Through hole; 52. First air guide groove; 53. Second air guide groove; 6. Positioning plate; 61. First inclined plane; 62. Second inclined plane; 7. Product. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present application will be described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments.

[0026] It should be noted that when a component is considered to be "connected" to another component, it may be directly connected to the other component or there may be a central component at the same time. When a component is considered to be "located on" another component, it may be directly located on the other component or there may be a central component at the same time. The terms "top", "bottom", "upper", "lower", "left", "right", "front", "back", and similar expressions used herein are for illustrative purposes only.

[0027] Unless otherwise specified, the term "plurality" as used herein means two or more than two.

[0028] The terms "first", "second", etc. are only used to distinguish different objects and shall not be understood as indicating or implying relative importance or implying the quantity, specific order or primary and secondary relationship of the indicated technical features.

[0029] The term "perpendicular" is used to describe an ideal state between two components. In actual production or use, the two components may be in a state that is approximately perpendicular to each other.

[0030] It should be recognized that the dimensions of the layers, regions, films, plates, blocks, columns, convex parts, concave parts, etc. shown in the drawings are given for better understanding and more convenient description, and the present application is not limited to the dimensions shown in the drawings. In order to make the present application clear, elements not related to the description are omitted from the details of this specification.

[0031] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application.

[0032] The present application provides an air-floating shaft, including a movable sleeve, a shaft core, a reflective structure and a detector. A plurality of air guide holes are provided through the circumferential surface of the movable sleeve, and the air guide holes are used to introduce positive air pressure into the movable sleeve. The shaft core is movably arranged in the movable sleeve, and there is a gap between the shaft core and the movable sleeve. The shaft core has a first end and a second end opposite to each other. When the shaft core is arranged in the movable sleeve, the first end and the second end extend outside the movable sleeve respectively. The reflective structure is fixed to the shaft core, and the reflective structure is located on the outside of the movable sleeve and is close to the first end relative to the second end. The detector is arranged at one end of the movable sleeve close to the second end, and the detector is used to emit detection light. The detection light emitted by the detector passes through the gap and is directed to the reflective structure. The reflective structure reflects the detection light toward the outside of the shaft core, and the direction of reflection of the detection light is perpendicular to the axial direction of the shaft core.

[0033] In the above implementation process, the shaft core is inserted into the movable sleeve, and the air guide hole introduces positive air pressure into the movable sleeve, so that the shaft core is suspended in the movable sleeve under the action of the positive air pressure, and the blade is driven to rotate by the shaft core, thereby realizing the function of the air-floating shaft driving the blade to cut the product. The detector is set at the second end, so that the detector emits detection light toward the first end through the gap between the shaft core and the movable sleeve, so that the reflection structure reflects the reflected light to the outside of the shaft core in a direction perpendicular to the shaft core, so that when the air-floating shaft drives the blade to cut the product, the reflection structure reflects the light to the product, thereby realizing the purpose of detecting the relative position between the blade and the product, which helps to improve the cutting accuracy of the product. By setting the detector at the second end, the visual obstruction of the detector to the blade is reduced, so as to facilitate the observation of the working condition of the blade. The detection light emitted by the detector passes through the movable sleeve, which can reduce the interference of dust on the detection light, thereby achieving the effect of improving the detection accuracy of the detector.

[0034] Some embodiments of the present application will be described below in conjunction with the accompanying drawings. In the absence of conflict, the following embodiments and features in the embodiments may be combined with each other.

[0035] See also Figure 1 and Figure 2 The embodiment of the present application provides an air-floating shaft, comprising a movable sleeve 1, a shaft core 2, a reflective structure 3 and a detector 4. A blade (not shown) is installed at one end of the shaft core 2, so that the shaft core 2 is inserted into the movable sleeve 1 and the shaft core 2 is rotated under force, thereby achieving the purpose of the present air-floating shaft driving the blade to cut the product 7. The reflective structure 3 is fixed to the shaft core 2, and the detector 4 is fixed to the movable sleeve 1. The detection light 41 emitted by the detector 4 is reflected toward the product 7 through the reflective structure 3, thereby detecting the distance between the product 7 and the blade, thereby achieving the purpose of improving the cutting accuracy of the product 7.

[0036] In some embodiments, see Figure 1 and Figure 2 The movable sleeve 1 is a tubular structure, and a plurality of air guide holes 11 are formed through the circumferential surface of the movable sleeve 1. The shaft core 2 has a first end 21 and a second end 22 that are opposite to each other. When the shaft core 2 is arranged in the movable sleeve 1, the first end 21 and the second end 22 are respectively extended outside the movable sleeve 1, and the first end 21 is fixedly connected to the blade. During operation, positive air pressure is introduced into the movable sleeve 1 through the air guide holes 11 to suspend the shaft core 2 in the movable sleeve 1. When the second end 22 is rotated by force, the second end 22 drives the first end 21 and the blade on the first end 21 to rotate. When the air-floating shaft is adjusted to move closer to the product 7, the rotating blade contacts the product 7, thereby realizing the function of the air-floating shaft driving the blade to cut the product 7.

[0037] In some embodiments, see Figure 1 and Figure 2 , the reflective structure 3 is located on the outside of the movable sleeve 1, and there is a gap 20 between the reflective structure 3 and the movable sleeve 1 to prevent friction between the reflective structure 3 and the movable sleeve 1 when the shaft core 2 drives the reflective structure 3 to rotate, resulting in damage to the reflective structure 3 and increased rotation resistance of the shaft core 2. The detector 4 is located on the side of the movable sleeve 1 close to the second end 22, so that the detector 4 is away from the first end 21 and the blade at the first end 21, thereby reducing the visual obstruction of the detector 4 to the blade. The reflective structure 3 is close to the first end 21 relative to the second end 22, so that the reflective structure 3 is close to the blade, so as to shorten the distance between the intersection of the detection light 41 and the product 7 and the contact point between the blade and the product 7, so as to improve the accuracy of the detector 4 in detecting the relative position of the blade and the product 7 when the blade cuts the product 7.

[0038] See also Figure 2 and Figure 3 When the detector 4 is working, the detector 4 emits a detection light 41 toward the first end 21 through the gap 20 between the shaft core 2 and the movable sleeve 1, so that the reflection structure 3 reflects the reflected light in a direction perpendicular to the shaft core 2 to the outside of the shaft core 2, so that the detection light 41 is emitted to the product 7, thereby meeting the detection requirements of the detector 4. By the detection light 41 passing through the movable sleeve 1, the interference of the external environment (such as dust environment, etc.) on the optical path of the detection light 41 can be reduced, which helps to improve the detection accuracy of the detector 4.

[0039] In some embodiments, see Figure 1 and Figure 2 The reflective structure 3 includes a reflective surface 31 fixedly arranged on the shaft core 2, and the reflective surface 31 faces the detector 4 and the outside of the shaft core 2, so that the reflective surface 31 reflects the detection light 41 toward the product 7 along the direction perpendicular to the axis of the shaft core 2. The reflective surface 31 is arranged in an annular shape, so that when the reflective surface 31 rotates with the shaft core 2, the function of reflecting the detection light 41 can be maintained.

[0040] In some embodiments, see Figure 2 and Figure 4 A positioning plate 6 is provided on the fixed sleeve of the shaft core 2. The positioning plate 6 is close to the first end 21 relative to the second end 22. The positioning plate 6 is used to position the position of the shaft core 2. When the positioning plate 6 is subjected to the same air pressure on both sides along the length direction of the shaft core 2, the position of the positioning plate 6 is fixed relative to the movable sleeve 1, and then the positioning plate 6 drives the shaft core 2 to be fixed relative to the movable sleeve 1, thereby achieving the effect of fixing the shaft core 2, so as to reduce the risk that the shaft core 2 can move relative to the movable sleeve 1 along its axial direction, which helps to improve the accuracy of the air-floating shaft driven blade cutting product 7.

[0041] The positioning plate 6 is arranged in a ring shape, and a first inclined surface 61 is formed on the side of the positioning plate 6 facing the second end 22, the first inclined surface 61 faces the detector 4, and the first inclined surface 61 also faces the outside of the shaft core 2, and a reflective layer (not marked) is arranged on the first inclined surface 61, and the reflective layer is a reflective sticker or a reflective coating. The reflective surface 31 is formed by the reflective layer, so that the positioning plate 6 can position the shaft core 2 while reflecting the detection light 41 emitted by the detector 4 toward the product 7.

[0042] In some embodiments, see Figure 2 and Figure 4 A second inclined surface 62 is formed on the side of the positioning plate 6 facing the first end 21, and the second inclined surface 62 faces the first end 21 and the outer side of the shaft core 2. The first inclined surface 61 and the second inclined surface 62 are symmetrically arranged in a direction perpendicular to the shaft core 2 so that the two sides of the positioning plate 6 are subjected to uniform force, thereby helping to improve the stability of the positioning plate 6 in positioning the shaft core 2.

[0043] In some embodiments, see Figure 3 , Figure 5 and Figure 6 A voltage regulator tube 5 is arranged between the shaft core 2 and the movable sleeve 1. A plurality of through holes 51 are provided on the circumferential surface of the voltage regulator tube 5. The outer circumferential surface and / or the inner circumferential surface of the voltage regulator tube 5 are respectively penetrated with first air guide grooves 52, and the first air guide grooves 52 are connected with a plurality of through holes 51. Through the arrangement of the voltage regulator tube 5, and along the radial direction of the movable sleeve 1, the through holes 51 and the air guide holes 11 are staggered, so that the voltage regulator tube 5 shields the air guide holes 11, and the voltage regulator tube 5 is sleeved on the outer side of the shaft core 2, so that the positive air pressure entering the movable sleeve 1 from the air guide holes 11 is evenly distributed on the outer periphery of the voltage regulator tube 5, and finally the positive air pressure evenly distributed outside the voltage regulator tube 5 acts evenly on the shaft core 2 through the through holes 51, thereby reducing the direct impact of the positive air pressure entering the movable sleeve 1 from the air guide holes 11 on the shaft core 2, thereby helping to improve the stability of the shaft core 2 suspended in the movable sleeve 1.

[0044] In some embodiments, the plurality of through holes 51 are interconnected through the first air guide groove 52 , thereby helping to improve the stability of the air pressure in each through hole 51 .

[0045] In some embodiments, the first air guide groove 52 extends along the axial direction of the shaft core 2 and is connected to both sides of the shaft core 2, so that the detection light 41 emitted by the detector 4 can pass through the first air guide groove 52 and be emitted to the reflective structure 3, thereby helping to reduce the gap 20 between the shaft core 2 and the movable sleeve 1, making the structure of the air floating shaft more compact.

[0046] In some embodiments, the inner circumferential surface of the voltage regulator tube 5 is provided with a plurality of second air guide grooves 53 connected to the through hole 51, the second air guide grooves 53 are arranged in an annular shape, and the axis of the second air guide grooves 53 is colinear with the axis of the shaft core 2. The annular second air guide grooves 53 are wrapped around the outer periphery of the shaft core 2, so that the air pressure is evenly distributed on the outer periphery of the shaft core 2, thereby achieving the effect of reducing the resistance caused by uneven air pressure when the shaft core 2 rotates.

[0047] In some embodiments, the through holes 51 are distributed in a ring shape on the outer side of the second air guiding groove 53 to improve the uniformity of air pressure distribution in the second air guiding groove 53 .

[0048] In some embodiments, the diameter of the through hole 51 is 0.1 mm, 0.2 mm, 0.3 mm, 0.4 mm, etc.

[0049] In some embodiments, see Figure 1 and Figure 2 The second end 22 is provided with a magnetic pole 23 so that the shaft core 2 forms a rotor. By placing the second end 22 in the electromagnetic field, the magnetic pole 23 drives the second end 22 to rotate, thereby realizing the function of driving the shaft core 2 to rotate.

[0050] In some embodiments, the detector 4 is a laser ranging sensor, which belongs to the prior art and will not be described in detail here.

[0051] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application may be combined with each other.

[0052] The above is only a preferred embodiment of the present application and does not constitute any form of limitation to the present application. Any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present application are within the scope of the technical solution of the present application.

Claims

1. An air bearing, characterized in that: include A movable sleeve, wherein a plurality of air guide holes are formed through the circumferential surface of the movable sleeve, and the air guide holes are used to introduce positive air pressure into the movable sleeve; An axis core, the axis core is movably arranged in the movable sleeve, a gap exists between the axis core and the movable sleeve, the axis core has a first end and a second end opposite to each other, when the axis core is arranged in the movable sleeve, the first end and the second end extend outside the movable sleeve respectively, and the first end is used for mounting a blade; A reflective structure, wherein the reflective structure is fixed to the shaft core, the reflective structure is located outside the movable sleeve and is closer to the first end than the second end; A detector, the detector is arranged at one end of the movable sleeve close to the second end, and the detector is used to emit detection light; The detection light emitted by the detector passes through the gap and is emitted to the reflection structure. The reflection structure reflects the detection light toward the outside of the shaft core. The reflection direction of the detection light is perpendicular to the axial direction of the shaft core.

2. The air bearing according to claim 1, characterized in that: A voltage regulator tube is arranged in the gap, and the shaft core is arranged in the voltage regulator tube; A plurality of through holes are provided on the circumferential surface of the voltage-stabilizing tube, and the through holes and the air guide holes are staggered along the radial direction of the movable sleeve; The outer circumferential surface and / or the inner circumferential surface of the voltage-stabilizing tube are respectively penetrated with a first air-guiding groove, and the first air-guiding groove is communicated with a plurality of the through holes.

3. The air bearing according to claim 2, characterized in that: The first air guiding groove extends along the axis of the voltage-stabilizing tube, and the detection light emitted by the detector passes through the first air guiding groove.

4. The air bearing shaft according to claim 2, characterized in that: The inner circumferential surface of the voltage-stabilizing tube is provided with a plurality of second air-guiding grooves connected with the through hole. The second air-guiding grooves are arranged in an annular shape, and the axes of the second air-guiding grooves are colinear with the axis of the shaft core.

5. The air bearing shaft according to claim 1, characterized in that: The reflective structure comprises a reflective surface fixedly arranged on the shaft core, the reflective surface is close to the first end relative to the second end; the reflective surface faces the detector, and the reflective surface also faces the outside of the shaft core; The reflecting surface is ring-shaped.

6. The air bearing shaft according to claim 5, characterized in that: A positioning plate is sleeved on the shaft core, the positioning plate is close to the first end relative to the second end, a first annular inclined surface is formed on the side of the positioning plate facing the second end, and the first inclined surface faces the second end and the outer side of the shaft core; A reflective layer is disposed on the first inclined surface, and the reflective layer forms the reflective surface.

7. The air bearing shaft according to claim 6, characterized in that: A second annular inclined surface is disposed on one side of the positioning plate facing the first end, and the second inclined surface faces the first end and the outer side of the shaft core.

8. The air bearing shaft according to claim 1, characterized in that: There is a distance between the reflective structure and the movable sleeve.

9. The air bearing shaft according to claim 1, characterized in that: The second end is provided with a magnetic pole.

10. The air bearing shaft according to claim 1, characterized in that: The detector is a laser ranging sensor.

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