A pneumatic polishing machine

Abstract

The present invention provides a pneumatic polisher. The pneumatic polisher comprises a vacuum generator, a cylinder body, a vacuum cover, a dust ring, a grinding wheel and a fixing bolt. An extension head extends from the left side of the cylinder body, and an air inlet and an air outlet connected to the cylinder body are arranged on the extension head. The air outlet is arranged at the notch of the extension head, and the notch is closer to the cylinder body than the port of the air inlet. A plug-in column extends upward from the upper end of the vacuum generator and is plugged into the notch. The plug-in column is fixed by a fixing bolt. An air inlet port connected to the air outlet is arranged on the plug-in column. The vacuum generator is also provided with an exhaust port and a vacuum port connected to the air inlet port. The vacuum port of the vacuum generator is in a flat trumpet shape and is seamlessly connected to the vacuum cover and connected to each other. The vacuum cover is fixed to the lower end of the cylinder body. The lower end of the vacuum cover is a dust ring. The gap between the dust ring and the grinding wheel is 1-2 mm. The grinding wheel is driven by a blade group in the cylinder body to run at high speed.

Description

Technical Field

[0001] The invention relates to a pneumatic polishing machine. Background Art

[0002] Pneumatic grinder is a widely used polishing machine tool. When working, pneumatic grinder uses compressed air to intake at the air inlet of the cylinder body. The compressed air pushes the blade group in the cylinder body, so that the blade group drives the grinding wheel to rotate at high speed, and the rotating grinding wheel contacts the workpiece for grinding and polishing. A vacuum generator is connected to the outside of the air outlet of the cylinder body. The dust generated during the grinding process is sucked into the vacuum generator through the air outlet and enters the dust collecting bag along the exhaust pipe. In the existing technology, most pneumatic grinders have the problems of not being able to absorb dust completely and having poor dust removal effect. Summary of the invention

[0003] In view of the defects of the existing pneumatic grinder, the technical problem to be solved by the present invention is to provide a pneumatic grinder which is more in line with the gas kinematics principle and can absorb dust more cleanly; at the same time, the pneumatic grinder has a better dustproof effect.

[0004] In order to achieve the above object, according to one aspect of the present invention, the present invention is implemented by the following technical measures: a pneumatic polishing machine, comprising:

[0005] A cylinder body, wherein an extension head is extended from one side of the cylinder body, an air inlet connected to the cylinder body is arranged on the outer side of the extension head, a notch is opened on the front end surface of the extension head, an air outlet connected to the cylinder body is arranged at the notch, and the position of the notch is closer to the cylinder body than the end of the air inlet;

[0006] A vacuum cover, the vacuum cover being fixed to the lower end of the cylinder body;

[0007] A vacuum generator, wherein a plug-in column extends upward from the upper end of the vacuum generator, the plug-in column is plugged into the notch of the cylinder body and fixed by a fixing bolt, an air inlet port is arranged on the plug-in column, and an exhaust port and a vacuum port connected to the air inlet port are also arranged on the vacuum generator,

[0008] The vacuum generator on the vacuum port side is fixed to the vacuum cover, and the vacuum port of the fixed vacuum generator is connected to the inside of the vacuum cover;

[0009] The grinding wheel is located at the lower end of the vacuum cover and is driven by a blade group in the cylinder body to rotate at a high speed.

[0010] The pneumatic polishing machine is connected to a vacuum generator on the outside of the extension head of the cylinder body, and the vacuum generator is connected at a position closer to the cylinder body, thereby shortening the distance from the gas source to the vacuum generator, being more in line with the gas kinematics principle, and being able to generate a greater vacuum force. The dust generated during the grinding process is sucked more cleanly, and the dust removal effect is greatly improved.

[0011] Furthermore, the notch of the extension head of the cylinder body is arranged at the middle position of the front end surface of the extension head, and the width of the notch is slightly larger than the width of the vacuum generator plug-in column. The above design structure is the most reasonable and convenient to fix.

[0012] Furthermore, the cylinder body is provided with a raised outer retaining ring on the outer wall of the bottom, the outer retaining ring is provided with two notches, and the vacuum cover is provided with a clamping block on the inner wall thereof which is clamped in the notches. The above design is convenient and reliable for fixing.

[0013] Furthermore, the vacuum port is in the shape of a flat trumpet. The above design has the most ideal vacuum effect.

[0014] Furthermore, the pneumatic grinder further comprises a dustproof ring, which is fixed to the lower end of the vacuum cover, and the gap between the lower end of the dustproof ring and the grinding wheel is 1-2 mm. The above design has the most ideal dustproof effect.

[0015] Furthermore, the dustproof ring is provided with a clamping ring on its inner wall, and the vacuum cover is provided with an arc-shaped notch, and the arc-shaped clamping block provided on the vacuum port side of the vacuum generator is seamlessly clamped in the arc-shaped notch, and the arc-shaped clamping block and the vacuum cover are provided with mutually connected grooves, and when the vacuum cover is inserted into the dustproof ring, the groove clamps the clamping ring to fix the vacuum cover and the dustproof ring. The above design structure is simple and reasonable.

[0016] Furthermore, the plug-in column has a horizontal fixing through hole near the upper end thereof, the fixing through hole connects the air inlet port with the air outlet of the cylinder body, a sealing ring is provided on the side of the fixing through hole not opposite to the air outlet, and a fixing bolt is also screwed and fixed to the fixing through hole on this side. The above design increases the sealing performance.

[0017] Furthermore, the fixing bolt has a chamfer on its head. The above design is to better position the plug-in column of the vacuum generator on the notch of the cylinder body. When the plug-in column of the vacuum generator is installed into the notch of the cylinder body, the center lines of the two holes may not be on the same line. At this time, when the fixing bolt is screwed in, the chamfer on its head can rigidly squeeze the fixing through hole of the plug-in column to ensure their concentricity.

[0018] Compared with the prior art, the advantages of the present invention are: it is more in line with the principle of gas kinematics, can generate greater vacuum force, and the dust generated during the grinding process is sucked more cleanly, thereby greatly improving the dust removal effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings:

[0020] Figure 1 This is an exploded view of a pneumatic grinder described in the present invention.

[0021] Figure 2 This is a schematic diagram of the structure of the vacuum generator described in the present invention.

[0022] Explanation of the accompanying drawings: 1. Cylinder body; 2. Extension head; 3. Air inlet; 4. Notch; 5. Air outlet; 6. Vacuum cover; 7. Vacuum generator; 8. Plug-in column; 9. Fixing bolt; 10. Air inlet port; 11. Exhaust port; 12. Vacuum port; 13. Grinding wheel; 14. Outer retaining ring; 15. Notch; 16. Block; 17. Dust ring; 18. Retaining ring; 19. Arc notch; 20. Arc-shaped block; 21. Groove; 22. Fixed through hole; 23. Sealing ring. DETAILED DESCRIPTION

[0023] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments. It should be noted that the embodiments and features in the embodiments of the present application can be combined with each other without conflict.

[0024] In the description of the present invention, it is necessary to understand that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", "bottom", "top", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0025] Example 1

[0026] Please refer to Figure 1 and Figure 2The pneumatic polishing machine provided in this embodiment includes a vacuum generator 7, a cylinder body 1, a vacuum cover 6, a dust ring 17, a grinding wheel 13 and a fixing bolt 9. The vacuum generator 7 is provided with an air inlet port 10, a vacuum port 12 and an exhaust port 11 which are interconnected. By using the existing vacuum negative pressure generation principle, when compressed air enters the air inlet port 10, a vacuum port 12 will generate a vacuum. The vacuum port 12 of the vacuum generator 7 is in a flat trumpet shape, and an arc-shaped block 20 extends to the right at the vacuum end. The arc-shaped block 20 is matched with the arc-shaped notch 19 provided in the vacuum cover 6 to form a seamless plug-in, and the vacuum port 12 is connected to the inside of the vacuum cover 6. The outer end of the arc-shaped block 20 and the outer wall of the vacuum cover 6 are provided with grooves 21 that are connected to each other, and the grooves 21 are arranged in a circle. A plug-in column 8 extends upward from the upper part of the vacuum generator 7, and a fixed through hole 22 is horizontally opened near the top of the plug-in column 8. The air inlet port 10 is located at the bottom of the fixed through hole 22. An extension head 2 extends outward from the left end of the cylinder body 1, and an air inlet 3 connected to the cylinder body 1 is horizontally opened on the inner side of the extension head 2. A notch 4 is opened in the middle position of the outer end face of the extension head 2, and the notch 4 is closer to the cylinder body 1 than the port of the air inlet 3. At the same time, a notch 4 is horizontally opened on the right end face of the notch 4, which is connected to the cylinder body 1. The connected air outlet 5, after the plug-in column 8 is inserted into the groove 4, the fixing bolt 9 is screwed into the fixing through hole 22 from the outside of the extension head 2 for fixing. At the same time, a sealing ring 23 is also fixed in the fixing through hole 22. The sealing ring 23 plays a role in preventing air leakage. A circle of outer retaining ring 14 extending outward is fixed on the outer wall of the lower end of the cylinder body 1. Two opposite notches 15 are opened on the outer retaining ring 14. A block 16 inserted in the notch 15 is fixed on the inner wall of the vacuum cover 6. The dust ring 17 plays a shielding role. After the dust ring 17 is connected and fixed to the vacuum cover 6, it is necessary to ensure that the gap between the dust ring 17 and the grinding wheel 13 at the lower end of the dust ring 17 is between 1-2 mm. The dust ring 17 is hollow, and a clamping ring 18 stuck in the groove 21 is fixed on its inner wall. When the dust ring 17 is assembled with the vacuum cover 6, the clamping ring 18 at the bottom of the vacuum cover 6 is buckled into the groove 21 to achieve the purpose of fixing the dust ring 17. The head of the fixing bolt 9 is provided with a chamfer. The purpose of the chamfer is that when the plug-in column 8 of the vacuum generator 7 is installed into the notch 4 of the cylinder body 1, the center lines of the two holes may not be on the same line. At this time, when the fixing bolt 9 is screwed in, the chamfer of its head can rigidly squeeze the fixed through hole 22 of the plug-in column 8 to ensure their concentricity. The grinding wheel 13 is driven by the blade group in the cylinder body 1 to rotate at high speed.

[0027] During installation, align the notch 15 on the cylinder body 1 with the block 16 of the vacuum cover 6, press the cylinder body 1 downward, and when the outer retaining ring 14 hits the inner retaining ring of the vacuum cover 6, rotate it about 10 degrees, the vacuum cover 6 can be clamped and fixed to the cylinder body 1, place the sealing ring 23 in the fixing through hole 22 of the plug-in column 8 of the vacuum generator 7, and put them into the groove 4 of the cylinder body 1, screw the fixing bolt 9 into the thread, and then fix the plug-in column 8 of the vacuum generator 7, so as to fix the vacuum generator 7, and then buckle the raised retaining ring 18 on the inner side of the dust ring 17 into the groove 21 of the vacuum cover 6, so that the vacuum generator 7, the dust ring 17 and the vacuum cover 6 are fixed, and finally the grinding wheel 13 is fixed to the cylinder body 1.

[0028] When the pneumatic grinder is working, compressed air comes in from the air inlet 3 of the cylinder body 1, pushing the blade group in the cylinder body 1, so that the blade group drives the grinding wheel 13 to rotate at high speed, and the rotating grinding wheel 13 is in contact with the workpiece for grinding and polishing. The compressed gas flow discharged from the cylinder body 1 enters the air inlet port 10 of the vacuum generator 7, and a vacuum negative pressure is generated at the vacuum port 12 of the vacuum generator 7, so that the dust generated during the work is sucked in from the gap between the dustproof ring 17 and the grinding wheel 13, passes through the vacuum cover 6, the vacuum port 12 of the vacuum generator 7, and the exhaust port 11 of the vacuum generator 7, and is finally sucked into the dust collecting bag.

[0029] The pneumatic polishing machine provided in this embodiment changes the prior art method of connecting the vacuum generator 7 from the outside of the air outlet 5 of the cylinder body 1, and selects to open a slot 4 in the middle part of the outer wall of the extension head 2, and then connect the vacuum generator 7, and a dust ring 17 is added on the grinding wheel 13. This novel structure shortens the distance from the air source to the vacuum generator 7, is more in line with the kinematic principle of gas, can generate a greater vacuum force, and the dust generated during the grinding process is sucked more cleanly, and the dust removal effect is greatly improved, which is worthy of popularization and application.

[0030] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A pneumatic polishing machine, characterized in that: include: A cylinder body, wherein an extension head is extended from one side of the cylinder body, an air inlet connected to the cylinder body is arranged on the outer side of the extension head, a notch is opened on the front end surface of the extension head, an air outlet connected to the cylinder body is arranged at the notch, and the position of the notch is closer to the cylinder body than the end of the air inlet; A vacuum cover, the vacuum cover being fixed to the lower end of the cylinder body; A vacuum generator, wherein a plug-in column extends upward from the upper end of the vacuum generator, the plug-in column is plugged into the notch of the cylinder body and fixed by a fixing bolt, an air inlet port is arranged on the plug-in column, and an exhaust port and a vacuum port connected to the air inlet port are also arranged on the vacuum generator, The vacuum generator on the vacuum port side is fixed to the vacuum cover, and the vacuum port of the fixed vacuum generator is connected to the inside of the vacuum cover; A grinding wheel, which is located at the lower end of the vacuum cover and is driven by a blade group in the cylinder body to rotate at high speed; The pneumatic grinder also includes a dust ring, which is fixed to the lower end of the vacuum cover, and the gap between the lower end of the dust ring and the grinding wheel is 1-2 mm. The dustproof ring has a clamping ring on its inner wall, and the vacuum cover has an arc-shaped notch for seamlessly clamping an arc-shaped clamping block arranged on the vacuum port side of the vacuum generator. The arc-shaped clamping block and the vacuum cover are provided with mutually connected grooves. When the vacuum cover is inserted into the dustproof ring, the groove clamps the clamping ring to fix the vacuum cover and the dustproof ring.

2. A pneumatic polishing machine according to claim 1, characterized in that: The notch of the extension head of the cylinder body is arranged at the middle position of the front end surface of the extension head, and the width of the notch is slightly larger than the width of the vacuum generator plug-in column.

3. A pneumatic polishing machine according to claim 1 or 2, characterized in that: The cylinder body is provided with a raised outer retaining ring on its bottom outer wall, and two notches are opened on the outer retaining ring. The vacuum cover is provided with a clamping block clamped in the notches on its inner wall.

4. The pneumatic polishing machine according to claim 1, characterized in that: The vacuum port is in a flat trumpet shape.

5. The pneumatic polishing machine according to claim 1, characterized in that: The plug-in column has a horizontal fixing through hole near the upper end, which connects the air inlet port with the air outlet of the cylinder body. A sealing ring is provided on the side of the fixing through hole that is not opposite to the air outlet, and a fixing bolt is also screwed and fixed to the fixing through hole on this side.

6. A pneumatic polishing machine according to claim 5, characterized in that: The fixing bolt has a chamfer on its head.

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