Dustproof device for automatic tool changing main shaft

Abstract

The utility model discloses an automatic tool changing spindle dustproof device which is used for clamping a tool. The device comprises a body, the body extends in the axial direction, a first through hole and a second through hole are formed in the two ends of the body in the axial direction respectively, and an air inlet hole is formed in the outer wall of the body; the sleeve penetrates through the first through hole, the sleeve comprises a first crown-shaped part and a second crown-shaped part which are arranged in a stacked mode, and the outer diameter of the first crown-shaped part is smaller than that of the second crown-shaped part; the dustproof mechanism comprises a first annular part and a second annular part which are arranged in a stacked mode, the inner diameter of the first annular part is smaller than that of the second annular part, and at least part of the side, facing the body, of the first annular part is attached to the side, away from the body, of the second crown-shaped part; the clamping mechanism is arranged in the sleeve in a penetrating mode, and a smooth air channel is formed in the body from the clamping mechanism to the air inlet. By means of the structure, the sleeve close to the machining tool and the dustproof mechanism are combined in a stacked mode, and waste chips are prevented from entering the device.

Description

Technical Field

[0001] The utility model relates to an automatic tool-changing spindle dust-proof device, belonging to the technical field of PCB processing. Background Art

[0002] The description in this section merely provides background information related to the disclosure of the present utility model and does not constitute prior art.

[0003] The spindle is a high-speed rotating machine that drives the cutter head to rotate through an electric drive. It is mainly used for board cutting, drilling and other operations on printed circuit boards (PCBs). The characteristics of the spindle are high speed, high precision, high stability and low temperature rise, which can ensure the quality and efficiency of PCB processing. The tool clamped at one end of the spindle is a tool used for cutting, milling, drilling, boring, threading and other operations on the workpiece. Different types of knives have different shapes, sizes, materials and functions, suitable for different processing requirements and conditions.

[0004] Generally speaking, a lot of waste materials and chips will be generated during the process of circuit board processing by the tool. The waste chips can spread through the air or pop out during processing. If the waste chips enter the spindle through the gap, it may cause the waste chips to enter the spindle bearings or lubrication system, causing spindle wear or heating, reducing the life and accuracy of the spindle, and may also affect the balance of the spindle, causing spindle vibration or noise, affecting the quality and efficiency of processing, and even, in some cases, the waste chips may scratch the spindle and cause spindle positioning errors or tool loosening, affecting the safety of the staff.

[0005] Currently there is no automatic tool changing spindle dust prevention device that can solve the above problems. Utility Model Content

[0006] The utility model aims to provide an automatic tool-changing spindle dust-proof device, which can prevent waste chips from entering the interior of the device by stacking a sleeve adjacent to a processing tool and a dust-proof mechanism.

[0007] In order to achieve the above-mentioned purpose, the utility model discloses the following automatic tool change spindle dust prevention device, which is used for clamping a tool, comprising:

[0008] A body, the body extending in the axial direction, the body comprising a first through hole and a second through hole at two ends of the axial direction respectively, and an air inlet hole on an outer wall of the body;

[0009] A sleeve, the sleeve passing through the first through hole, the sleeve comprising a first crown portion and a second crown portion stacked together, the outer diameter of the first crown portion being smaller than that of the second crown portion;

[0010] A dustproof mechanism, the dustproof mechanism comprising a first annular portion and a second annular portion which are stacked, the inner diameter of the first annular portion being smaller than that of the second annular portion, and at least a part of the first annular portion facing the body is in contact with a side of the second crown portion away from the body;

[0011] A clamping mechanism is provided in the sleeve, and a smooth air passage is provided from the clamping mechanism to the air inlet inside the main body.

[0012] Further, the outer annular wall of the first annular portion includes a plurality of blind holes in the radial direction.

[0013] Furthermore, the sleeve includes a plurality of grooves on a wall of the sleeve on one side away from the first crown portion.

[0014] Furthermore, the side of the clamping mechanism facing the body is configured as a tapered cylinder with a radius gradually decreasing along the axial direction, and the side of the clamping mechanism away from the body is configured as a hexagonal nut extending along the axial direction.

[0015] Furthermore, the clamping mechanism comprises a plurality of clamping blocks which are equally divided at equal angles along the radial direction.

[0016] Further, the length of the sleeve along the axial direction matches the length of the clamping mechanism along the axial direction.

[0017] Furthermore, the side of the sleeve along the axial direction away from the main body includes a ring-shaped limiting step for limiting the disengagement of the clamping mechanism, and the side of the sleeve along the axial direction facing the main body includes a limiting screw arranged along the radial direction for limiting the installation depth of the tool.

[0018] Furthermore, the air inlet hole includes a bent pipe and a three-way valve that are connected through it.

[0019] By means of the above technical solution, the beneficial effects of the utility model are as follows:

[0020] The utility model can prevent the circuit board waste generated by the tool processing on the circuit board from entering the spindle through the gap on the side of the tool, causing the spindle to be scratched or vibrate and make noise, and indirectly improve the efficiency of the spindle. The sleeve structure extending out of the main body can prevent the waste from entering the clamping mechanism and even the spindle from the side of the clamping mechanism, and the crown and ring parts stacked in the sleeve and the dustproof mechanism can significantly reduce the possibility of waste entering the spindle from the gap of the spindle. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of this specification 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 recorded in this specification. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0022] Figure 1 It is an isometric schematic diagram of an automatic tool changing spindle dust prevention device provided in an embodiment of this specification;

[0023] Figure 2 It is a schematic diagram of a sleeve of an automatic tool changing spindle dust prevention device provided in an embodiment of this specification;

[0024] Figure 3 It is a schematic diagram of a dust prevention mechanism of an automatic tool changing spindle dust prevention device provided in an embodiment of this specification;

[0025] Figure 4 It is a schematic diagram of a combination of a sleeve and a dustproof mechanism of an automatic tool-changing spindle dustproof device provided in an embodiment of this specification;

[0026] In the figure: 100, tool; 1, body; 11, first through hole; 12, second through hole; 13, air inlet; 2, sleeve; 21, first crown-shaped portion; 22, second crown-shaped portion; 23, groove; 3, dustproof mechanism; 31, first annular portion; 311, blind hole; 32, second annular portion; 4, clamping mechanism; 5, bending tube. DETAILED DESCRIPTION

[0027] In order to enable those skilled in the art to better understand the technical solutions in this specification, the technical solutions in the embodiments of this specification will be clearly and completely described below in conjunction with the drawings in the embodiments of this specification. Obviously, the described embodiments are only part of the embodiments of this specification, not all of the embodiments. Based on the embodiments in this specification, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of this specification.

[0028] In the description of the present utility model, it should be noted that the terms "upper", "middle", "lower", "inner", "outer", "front", "back" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or component referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present utility model. The terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances. The following describes the implementation method of the present utility model based on its overall structure.

[0029] See also Figure 1-4 , is an automatic tool change spindle dust prevention device of this embodiment, used for clamping a tool 100, including:

[0030] A body 1, which extends in the axial direction, comprises a first through hole 11 and a second through hole 12 at two ends of the body 1 in the axial direction, and an air inlet hole 13 is formed on the outer wall of the body;

[0031] The sleeve 2 is passed through the first through hole 11, and the sleeve 2 includes a first crown portion 21 and a second crown portion 22 which are stacked, and the outer diameter of the first crown portion 21 is smaller than that of the second crown portion 22;

[0032] The dustproof mechanism 3 includes a first annular portion 31 and a second annular portion 32 which are stacked. The inner diameter of the first annular portion 31 is smaller than that of the second annular portion 32. At least a part of the first annular portion 31 facing the body 1 is in contact with a side of the second crown portion 32 away from the body 1.

[0033] The clamping mechanism 4 is inserted into the sleeve 2 , and a smooth air passage is formed inside the main body 1 from the clamping mechanism 4 to the air inlet 13 .

[0034] When using this embodiment, the staff only needs to connect the air inlet 13 on the body 1 with the external air valve and control the air inlet pressure of the air inlet 13, so that the clamping mechanism 4 at the first through hole 11 inside the body 1 can be driven by the air pressure, and then the thrust of the clamping mechanism 4 can be controlled by the air pressure. When the air pressure is high, the clamping mechanism 4 has a large thrust, and the clamping mechanism 4 is pushed out of the sleeve 2. After the clamping mechanism 4 composed of a multi-petal separation structure is relaxed, the tool 100 can be separated from the clamping mechanism 4, and automatic tool change can be achieved. When the air pressure input into the air inlet 13 is 0, the clamping mechanism 4 is pulled back into the sleeve 2 by an elastic mechanism connected to the inside of the body 1. At this time, the clamping mechanism 4 composed of a multi-petal separation structure can also tightly clamp the tool 100 and stabilize it, and the device can further process the circuit board.

[0035] During the processing of this embodiment, the debris generated by the circuit board is freely dispersed from the position of the tool 100 to the direction of the body 1. At this time, since the sleeve 2 extends away from the body 1 to completely cover the side of the clamping mechanism 4, a large amount of debris can be blocked by the sleeve 2 to prevent it from contacting the side area of ​​the clamping mechanism 4. In addition, there is a structural gap at the contact point between the first through hole 11 and the sleeve 2, and a large amount of original waste debris may enter the interior of the body 1 from the gap, and then affect the shaft body. In this embodiment, the two layers of the first annular portion 31 and the second annular portion 32 in the dustproof mechanism 3 are superimposed on the two layers of the first crown portion 21 and the second crown portion 22 of the protruding edge shape in the middle position of the sleeve 2, that is, the side wall of the first annular portion 31 close to the body 1 can be tightly buckled on the side wall of the second crown portion 22 away from the body 1, and the space barrier on both sides of the body 1 is achieved through the structural sealing of the first annular portion 31 and the second crown portion 22, preventing the waste debris from entering the body 1 and affecting the normal operation of the spindle.

[0036] Furthermore, the body 1 is configured as a cylindrical barrel structure extending axially and having covers at both ends. One side of the first through hole 11 corresponds to the grinding position of the tool 100. The tool is clamped by the clamping mechanism 4 in the sleeve 2 to rotate and process the circuit board. One side of the second through hole 12 corresponds to the position of the electric drive motor. One end of the electric drive motor passes through the second through hole 12 and is fixed to the clamping mechanism 4 inside the body 1, and drives the clamping mechanism 4 to rotate around the axial direction to drive the tool 100 to rotate controllably. The body 1 has an integrated cover plate with a disc structure on the side of the first through hole 11. Figure 3 The first annular portion 31 has a larger diameter, and the first annular portion 31 is closely attached to the body 1 on the side of the first through hole 11 facing the body 1, and the second annular portion 32 has a smaller radial diameter, and the outer portion of the second annular portion 32 is buckled in the body 1 portion of the outer circle of the first through hole 11. Figure 2As shown, with the positions of the first crown 21 and the second crown 22 as reference, the sleeve 2 at the end of the first crown 21 away from the body 1 has a shorter axial length, and the sleeve 2 at the end of the second crown 22 facing the body 1 has a longer axial length. The position of the clamping mechanism 4 in the retracted state matches the sleeve 2, so that the clamping mechanism 4 can be dust-proofed by the sleeve 2 when working, and because the length of the fixed part of the sleeve 2 inside the body 1 is greater than the suspended part of the sleeve 2 outside the body 1, the tool 100 clamped by the clamping mechanism 4 also has better rotational stability. The length of the first crown 21 along the axial direction matches the length of the first annular portion 31 along the axial direction. Similarly, the length of the second crown 22 along the axial direction also matches the length of the second annular portion 32 along the axial direction, so that the sleeve 2 can be more tightly buckled by the dustproof mechanism 3. After buckling, one end of the sleeve 2 is fixed inside the body 1, and the dustproof mechanism 3 is fixed on the outer cylinder wall of the body 1 on the side of the first through hole 11, achieving a better sealing and dustproof effect.

[0037] Furthermore, if Figure 3 As shown, the outer ring wall of the first annular portion 31 includes a plurality of blind holes 311 in the radial direction. Specifically, in this embodiment, two blind holes 311 are included, and the positions of the two blind holes 311 are on the same straight line. The blind holes 311 can be used to quickly disassemble and assemble the dustproof mechanism 3 by using an external wrench or other tool with the help of the position limit of the blind holes 311.

[0038] Furthermore, if Figure 2 As shown, the sleeve 2 includes a plurality of grooves 23 on the wall of one side away from the first crown portion 21. Similarly, the sleeve 2 also includes two grooves 23 in the radial direction in the same straight line, so that the sleeve 2 can be quickly disassembled and assembled by tools such as external wrenches, further improving maintenance efficiency.

[0039] Furthermore, the side of the clamping mechanism 4 facing the main body 1 is set as a tapered cylinder with a gradually decreasing axial radius, and the side of the clamping mechanism 4 away from the main body 1 is set as a hexagonal nut extending in the axial direction. At the same time, the clamping mechanism 4 includes a plurality of clamping blocks equally divided along the radial direction at equal angles. The clamping mechanism 4 at the tapered cylinder portion can make its outer wall always separate the clamping blocks of the multi-petal clamping mechanism 4 under the action of air pressure during the expansion process, and make the clamping blocks always fit the inner wall surface of the sleeve 2 and slide relative to the inner wall surface of the sleeve 2, so that the tool changing process is smoother. The hexagonal nut at the outermost end of the clamping mechanism 4 is also to facilitate the rapid disassembly and assembly of the clamping mechanism 4 by means of external wrenches and other tools, so as to further improve the maintenance efficiency of the device of the utility model.

[0040] Furthermore, the axial length of the sleeve 2 matches the axial length of the clamping mechanism 4. That is, when the clamping mechanism 4 is in a working state of being fully retracted into the body 1, the tool 100 is fixed by the clamping mechanism 4, and the side portion of the clamping mechanism 4 is completely shielded and covered by the sleeve 2, thereby effectively preventing the waste chips generated during the machining process from entering the body 1 through the side portion of the clamping mechanism 4 to cause adverse effects.

[0041] Furthermore, the side of the sleeve 2 axially away from the body 1 includes a limiting step arranged in an annular manner for the limiting clamping mechanism 3 to be disengaged, and the side of the sleeve 2 axially facing the body 1 includes a limiting screw arranged in a radial direction for limiting the installation depth of the tool 100. The main function of the limiting step and the limiting screw is to prevent the clamping mechanism 3 from being disengaged from the body or being excessively sunk into the body 1 by limiting the maximum forward and backward travel of the clamping mechanism 3 in the axial direction.

[0042] Furthermore, the air inlet 13 includes a through-connected bending tube 5 and a three-way valve. Specifically, the bending tube 5 in this embodiment is an L-shaped corrosion-resistant sealed steel tube, one end of the bending tube 5 is sealed and docked on one side of the body 1, and the other end faces the direction of the electric drive motor. The bending tube 5 is directly docked with the three-way valve, and the three-way valve realizes basic air pressure regulation inside the body 1 through parallel control of the air inlet, the air outlet and the exhaust port.

[0043] The present invention uses specific embodiments to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method and core idea of ​​the present invention. At the same time, for those skilled in the art, according to the idea of ​​the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as a limitation on the present invention.

Claims

1. A dust-proof device for an automatic tool-changing spindle, used for clamping a tool; characterized in that: include: A body, the body extending in the axial direction, the body comprising a first through hole and a second through hole at two ends of the axial direction respectively, and an air inlet hole on an outer wall of the body; A sleeve, the sleeve passing through the first through hole, the sleeve comprising a first crown portion and a second crown portion stacked together, the outer diameter of the first crown portion being smaller than that of the second crown portion; A dustproof mechanism, the dustproof mechanism comprising a first annular portion and a second annular portion arranged in a stacked manner, the inner diameter of the first annular portion being smaller than that of the second annular portion, and at least a portion of the first annular portion facing the body is in contact with a side of the second crown portion away from the body; A clamping mechanism is provided in the sleeve, and a smooth air passage is provided from the clamping mechanism to the air inlet inside the main body.

2. The automatic tool changing spindle dust prevention device according to claim 1 is characterized in that: The outer annular wall of the first annular portion includes a plurality of blind holes in the radial direction.

3. The automatic tool changing spindle dust prevention device according to claim 1 is characterized in that: The sleeve includes a plurality of grooves on a wall of the sleeve on one side away from the first crown portion.

4. The automatic tool changing spindle dust prevention device according to claim 1 is characterized in that: The side of the clamping mechanism facing the body is configured as a tapered cylinder with a gradually decreasing radius along the axial direction, and the side of the clamping mechanism away from the body is configured as a hexagonal nut extending along the axial direction.

5. The automatic tool changing spindle dust prevention device according to claim 1 is characterized in that: The clamping mechanism comprises a plurality of clamping blocks which are evenly divided at equal angles along the radial direction.

6. The automatic tool changing spindle dust prevention device according to claim 1, characterized in that: The length of the sleeve along the axial direction matches the length of the clamping mechanism along the axial direction.

7. The automatic tool changing spindle dust prevention device according to claim 1 is characterized in that: The side of the sleeve along the axial direction away from the main body includes a ring-shaped limiting step for limiting the disengagement of the clamping mechanism, and the side of the sleeve along the axial direction facing the main body includes a radially arranged limiting screw for limiting the installation depth of the tool.

8. The automatic tool changing spindle dust prevention device according to claim 1 is characterized in that: The air inlet hole includes a bent pipe and a three-way valve that are connected through it.

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