Front-end air seal mechanism for finishing spindle of carborundum grinding wheel

Abstract

The utility model relates to a front end air seal mechanism for a carborundum grinding wheel finishing main shaft. Wherein the front pressing plate is fixed at the front end of the outer cylinder, the grinding wheel seat and the dustproof cover are fixedly connected at the front end of the rotor, the front pressing plate is arranged between the grinding wheel seat and the front end of the outer cylinder, and the dustproof cover is arranged between the front pressing plate and the rotor; a first gap is reserved between the grinding wheel seat and the front pressing plate; the gas ring is arranged in a ring groove in the front end face of the front pressing plate; a radial air hole of the gas ring is communicated with the annular gas grooves of the gas ring inner wall and the gas ring outer wall; the outer wall of the gas ring is tightly attached to the large-diameter side wall of the annular groove, and the first gas channel of the front pressing plate is communicated with the annular gas groove of the gas ring. The convex ring of the dustproof cover is inserted between the inner wall of the gas ring and the ring groove, a second gap is reserved between the dustproof cover and the gas ring, and the second gap and the first gap are communicated to form a gas seal channel. Compressed air is introduced into the air seal passage, so that pollutants are difficult to enter the rotor from the first gap and the second gap, and the antifouling performance of the gap at the front end of the main shaft is improved.

Description

Technical Field

[0001] The present application relates to a spindle structure, and more specifically to a front end air sealing mechanism for a diamond wheel dressing spindle. Background Art

[0002] In the actual application of diamond grinding wheel dressing spindle, in order to ensure the good high-speed operation of the spindle rotor, a certain gap is required between the grinding wheel seat and its bearing pressure plate. The water flow during operation is very large, so it is easy for water, dust and other pollutants to enter these gaps. Especially during the high-speed operation of the rotor, once negative pressure is generated in the gap, these pollutants can easily enter the gap under the action of airflow, and even contaminate the bearings, motors and other precision components inside the spindle. Therefore, how to improve the anti-fouling performance in the gap at the front end of the spindle is a technical problem that needs to be solved urgently. Utility Model Content

[0003] The purpose of the present application is to overcome the above-mentioned deficiencies of the prior art and to provide a front-end air sealing mechanism for a diamond grinding wheel dressing spindle to improve the anti-fouling performance of the front-end gap of the spindle.

[0004] To achieve the above-mentioned purpose, the present application provides the following technical solutions: a front-end air sealing mechanism for a diamond grinding wheel dressing spindle, the spindle comprises an outer cylinder and a rotor, the rotor passes through the outer cylinder, the front-end air sealing mechanism comprises a front pressure plate, an air ring, a dust cover and a grinding wheel seat, the front pressure plate is fixed to the front end of the outer cylinder, the grinding wheel seat and the dust cover are fixedly connected to the front end of the rotor, the front pressure plate is placed between the grinding wheel seat and the front end of the outer cylinder, and the dust cover is placed between the front pressure plate and the rotor; a first gap connecting to the outside is left between the grinding wheel seat and the front pressure plate; the front end surface of the front pressure plate is provided with An annular groove which is coaxial with the front pressure plate and opens forward, and an air ring is placed in the annular groove; a plurality of radial air holes are evenly arranged on the air ring, and an annular air groove is arranged on the outer wall of the air ring, and the air holes connect the inner wall of the air ring and the annular air groove; the outer wall of the air ring is close to the side wall with a larger diameter of the annular groove, and a first air channel for letting compressed gas pass is arranged in the front pressure plate, and the first air channel connects to the annular air groove of the air ring; a first convex ring is arranged on the dust cover, and the first convex ring is inserted between the inner wall of the air ring and the annular groove, and a second gap is left between the dust cover and the air ring, and the second gap is connected to the first gap to form an air-sealed passage.

[0005] In the technical solution of the present application, the front pressure plate, the air ring, the dust cover and the grinding wheel seat form an air-sealing passage, and compressed air is passed into the air-sealing passage. There is fast-flowing gas in the first gap and the second gap, and it is difficult for pollutants to enter the interior of the rotor from the first gap and the second gap, thereby improving the anti-fouling performance of the gap at the front end of the spindle, reducing the risk of contamination of the internal components of the rotor, and improving the stability of the spindle.

[0006] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the following preferred embodiments are specifically cited and described in detail as follows. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] Figure 1 This is a cross-sectional view of the front end of the spindle of this application.

[0008] Figure 2 for Figure 1 Enlarged view of area A.

[0009] Figure 3 This is a three-dimensional diagram of the gas ring of this application.

[0010] It should be noted that the products shown in the above views have been appropriately reduced / enlarged to suit the size of the drawings and for clarity of the views, and there is no restriction on the size of the products shown in the views. DETAILED DESCRIPTION

[0011] In order to make the objectives, technical solutions and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0012] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of this application.

[0013] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0014] The embodiment of the present application is a front-end air sealing mechanism for a diamond grinding wheel dressing spindle, and its specific structure is as follows: Figure 1-3 shown.

[0015] like Figure 1As shown, the main shaft includes an outer cylinder 10 and a rotor 11, the rotor 11 passes through the outer cylinder 10, and two front bearings 12 are arranged between the front end of the rotor 11 and the front end of the outer cylinder 10. The front end gas sealing mechanism 20 includes a front pressure plate 21, an air ring 22, a dust cover 23 and a grinding wheel seat 24. The front pressure plate 21 is fixed to the front end of the outer cylinder 10, and the grinding wheel seat 24 and the dust cover 23 are fixed to the front end of the rotor 11 by threaded connection, the front pressure plate 21 is placed between the grinding wheel seat 24 and the front end of the outer cylinder 10, and the dust cover 23 is placed between the front pressure plate 21 and the rotor 11.

[0016] like Figure 2 As shown, a first gap 201 communicating with the outside is left between the grinding wheel seat 24 and the front pressure plate 21. The front end surface of the front pressure plate 21 is provided with an annular groove 212 which is coaxial with the front pressure plate 21 and opens forward. The air ring 22 is placed in the annular groove 212 and the outer wall of the air ring 22 is in close contact with the larger diameter side wall 2121 of the annular groove 212. The dust cover 23 is provided with a first convex ring 231, and the first convex ring 231 is inserted between the inner wall of the air ring 22 and the annular groove 212, and a second gap 202 is left between the dust cover 23 and the air ring 22, and the second gap 202 is connected with the first gap 201 to form an air-sealed passage. In addition, as shown Figure 2 and Figure 3 As shown, the air ring 22 is evenly provided with a plurality of radial air holes 221, and the outer wall of the air ring 22 is provided with an annular air groove 222, and the air holes 221 communicate with the inner wall of the air ring 22 and the annular air groove 222. The outer edges of the annular air groove 222 are respectively provided with chamfers 2221. Figure 2 As shown, a first air passage 211 for introducing compressed gas is provided in the front pressure plate 21, and the first air passage 211 is connected to the annular air groove 222 of the air ring 22. The compressed gas in the first air passage first enters the annular air groove 222, which plays the role of temporarily storing and buffering the air flow, and allows the air flow to flow evenly through each air hole 22. The compressed air passing through each air hole 22 enters the second gap 202 between the air ring 22 and the dust cover 23, then enters the first gap 201, and finally flows to the outside.

[0017] In the embodiment of the present application, the front pressure plate 21, the air ring 22, the dust cover 23 and the grinding wheel seat 24 form an air-sealed passage, and compressed air is passed into the air-sealed passage. There is fast-flowing gas in the first gap 201 and the second gap 202, and it is difficult for pollutants to enter the interior of the rotor 11 from the first gap 201 and the second gap 202, thereby improving the anti-fouling performance of the gap at the front end of the main shaft, reducing the risk of contamination of the internal components of the rotor 11, and improving the stability of the main shaft.

[0018] In some embodiments, such as Figure 2As shown, the first convex ring 231 is inserted between the inner wall of the air ring 22 and the ring groove 212, and the inner wall body 213 of the ring groove 212 is correspondingly inserted into the inner ring groove 2314 formed inside the first convex ring 231. Therefore, a labyrinth seal channel is formed between the first convex ring 231 and the front pressure plate 21, which helps to enhance the barrier protection effect and provides better protection for the front bearing 12.

[0019] In some embodiments, as Figure 2 shown, a second air passage 101 is provided on the wall body of the outer cylinder 10. The first air passage 211 communicates with the second air passage 101 and the annular air groove 222 of the air ring 22. Compressed gas sequentially passes through the second air passage 101, the first air passage 211, and the annular air groove 222. A sealing ring 102 is provided at the docking portion of the second air passage 101 and the first air passage 211.

[0020] In some embodiments, as Figure 2 shown, the dust cover 23 is provided with a second convex ring 232. The second convex ring 232 is placed between the grinding wheel base 24 and the air ring 22. A part of the second gap 202 is located between the second convex ring 232 and the air ring 22. In addition, the front end face of the front pressure plate 21 is provided with a third convex ring 214. The third convex ring 214 is inserted into the groove 241 on the rear end face of the grinding wheel base 24. The "C"-shaped gap 2011 formed between the third convex ring 214, the groove 241 of the grinding wheel base 24, and the second convex ring 232 is a part of the first gap 201. The second convex ring 232 and the third convex ring 214 form five bent channel portions 200 in the air seal passage, so that the compressed gas is bent five times in the air seal passage, which can not only generate uniform air sealing, but also further improve the waterproof and dustproof effect.

[0021] In some embodiments, as Figure 2 shown, the side wall of the third convex ring 214 facing the second convex ring 232 is a conical surface 2141. In the direction from the rear end to the front end, the inner diameter of the conical surface 2141 gradually increases.

[0022] In some embodiments, as Figure 2 shown, the width of the section 2010 of the first gap 201 connecting to the outside gradually decreases from the inside to the outside. Therefore, the airflow flowing out from the first gap 201 will be further accelerated, greatly enhancing the blocking effect on water and dust.

[0023] In some embodiments, as Figure 2 shown, the side surface of the first convex ring 231 facing the inner wall of the air ring 22 is provided with a first water collecting groove 2311, and the first water collecting groove 2311 is directly opposite to the air hole 221 of the air ring 22. A second water collecting groove 2312 is provided at the connection between the first convex ring 231 and the second convex ring 232. In addition, a third water collecting groove 2313 is further provided on the outer wall of the dust cover 23, and the third water collecting groove 2313 corresponds to the inner wall of the central shaft hole 210 of the front pressure plate 21.

[0024] In some embodiments, such as Figure 2 As shown, the rear end surface of the front pressure plate 21 is provided with a fourth convex ring 215 facing the rear end, and the fourth convex ring 215 abuts against the outer ring of the front bearing 12 to clamp the outer ring of the front bearing 12 to the inner wall of the outer cylinder 10. A sealing ring 216 is provided between the fourth convex ring 215 and the inner wall of the outer cylinder 10. Figure 1 As shown, the rear end of the dust cover 23 abuts against the inner ring of the front bearing 12 .

[0025] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0026] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0027] In the present application, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0028] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" 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 present application. In this specification, the schematic representation of the above terms should not be understood as necessarily being directed to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification.

[0029] The above examples are only used to further illustrate the technical content of this application so that readers can understand it more easily, but they do not mean that the implementation methods of this application are limited to these. Any technical extension or re-creation made based on this application is protected by this application. The scope of protection of this application shall be subject to the claims.

Claims

1. A front end air sealing mechanism for a diamond grinding wheel dressing spindle, the spindle comprising an outer cylinder and a rotor, the rotor passing through the outer cylinder, characterized in that: The front end air seal mechanism includes a front pressing plate, an air ring, a dust cover and a grinding wheel base. The front pressing plate is fixed to the front end of the outer cylinder. The grinding wheel base and the dust cover are fixedly connected to the front end of the rotor. The front pressing plate is disposed between the grinding wheel base and the front end of the outer cylinder, and the dust cover is disposed between the front pressing plate and the rotor. A first gap communicating with the outside is left between the grinding wheel base and the front pressing plate. The front end face of the front pressing plate is provided with a coaxial ring groove with an opening facing forward, and the air ring is placed in the ring groove. The air ring is evenly provided with a number of radial air holes. The outer wall of the air ring is provided with an annular air groove, and the air holes communicate the inner wall of the air ring and the annular air groove. The outer wall of the air ring is closely attached to the side wall with a larger diameter of the ring groove. A first air passage for introducing compressed gas is opened in the front pressing plate, and the first air passage communicates with the annular air groove of the air ring. The dust cover is provided with a first convex ring, and the first convex ring is inserted between the inner wall of the air ring and the ring groove. A second gap is left between the dust cover and the air ring, and the second gap communicates with the first gap to form an air seal passage.

2. The front end air sealing mechanism for a diamond wheel dressing spindle according to claim 1, characterized in that: The dust cover is provided with a second convex ring, and the second convex ring is disposed between the grinding wheel base and the air ring. A part of the second gap is located between the second convex ring and the air ring.

3. The front end air sealing mechanism for diamond wheel dressing spindle according to claim 2, characterized in that: The front end face of the front pressing plate is provided with a third convex ring, and the third convex ring is inserted into the groove on the rear end face of the grinding wheel base. The "C"-shaped gap formed between the third convex ring, the groove of the grinding wheel base and the second convex ring is a part of the first gap.

4. The front end air sealing mechanism for a diamond wheel dressing spindle as claimed in claim 3, characterized in that: The second convex ring and the third convex ring form five bent channel parts in the air seal passage.

5. The front end air sealing mechanism for a diamond wheel dressing spindle as claimed in claim 3, characterized in that: The side wall of the third convex ring facing the second convex ring is a conical surface, and the inner diameter of the conical surface gradually increases in the direction from the rear end to the front end.

6. The front end air sealing mechanism for a diamond wheel dressing spindle according to claim 1, characterized in that: The width of the section of the first gap connecting to the outside gradually decreases from the inside to the outside.

7. The front end air sealing mechanism for a diamond wheel dressing spindle according to claim 1, characterized in that: The side face of the first convex ring facing the inner wall of the air ring is provided with a first water collecting groove, and the first water collecting groove is directly opposite to the air holes of the air ring.

8. The front end air seal mechanism for diamond wheel dressing spindle according to claim 2, characterized in that: A second water collecting groove is provided at the connection between the first convex ring and the second convex ring.

9. The front end air sealing mechanism for a diamond wheel dressing spindle according to claim 1, characterized in that: A third water collecting groove is further provided on the outer wall of the dust cover, and the third water collecting groove corresponds to the inner wall of the central axis hole of the front pressing plate.

10. The front end air seal mechanism for diamond wheel dressing spindle according to claim 1, characterized in that: A front bearing is provided between the rotor and the front end of the outer cylinder. The rear end face of the front pressing plate is provided with a fourth convex ring facing the rear end, and the fourth convex ring abuts against the outer ring of the front bearing.

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