Ring-shaped air knife applied to a carving electric spindle

Abstract

The utility model discloses a kind of annular air knives applied to engraving electric main shaft, including annular air knife installed in the engraving electric main shaft, the annular air knife includes upper cover and lower cover, upper cover and lower cover assembly form annular cavity, the outside wall of lower cover is equipped with multiple gas inlet connector for gas inflow;The inner edge of the upper cover and lower cover is provided with the annular air outlet of oblique direction, to form stable air curtain. Fan imports gas into annular cavity via shunt connector and air pipe, forms continuous annular airflow, and is sprayed to the engraving electric main shaft tool bit area by annular air outlet, and completes dust removal with dust collector. The utility model is compact in structure, blows and sucks cooperation, and dust removal efficiency is high.

Description

Technical Field

[0001] This utility model relates to the field of electric spindle technology, and in particular to a ring-shaped air knife used in engraving electric spindles. Background Technology

[0002] Engraving spindles, as precision actuators that highly integrate the motor and spindle, are widely used in precision manufacturing scenarios such as CNC engraving and milling. However, during actual processing, they often generate a large amount of dust. This dust easily adheres to the workpiece surface or accumulates in the machining gaps. If it is not removed in time, it will not only affect the machining quality and cause surface contamination, but may also lead to tool wear or even damage.

[0003] To alleviate the above problems, existing engraving electric spindles are usually equipped with a dust collection system, which uses a dust hood and negative pressure suction to draw dust around the cutter head into a collection device. However, this method often relies on a high-powered vacuum cleaner to achieve ideal results, resulting in high energy consumption, and its cleaning effect on fine particles and deep groove dust is still insufficient.

[0004] Some devices attempt to add auxiliary air nozzles inside the dust collection hood, using compressed air to blow airflow towards the cutter head area to agitate attached dust and assist the vacuum cleaner in cleaning. However, this structure also has drawbacks: firstly, the directional design of irregularly shaped air nozzles requires high precision, and the machining accuracy and installation angle directly affect the blowing effect, making manufacturing and assembly difficult; secondly, since the engraving path often changes, multiple air nozzles in different directions need to be set up, along with a complex control system, to achieve on-demand start and stop of multi-channel airflow, thus increasing system stability and operational difficulty. Furthermore, the continuous operation of multiple air nozzles also causes significant compressed air consumption, significantly increasing operating costs and affecting the equipment's economic efficiency.

[0005] Furthermore, Chinese Patent Publication No. CN 220145047U discloses a ring-shaped air knife dust removal structure. Although it uses a ring-shaped air knife structure for dust removal, and utilizes an air blowing component arranged around the outer periphery of the dust removal hood to form an air curtain through air holes to prevent welding dust from splashing, its air blowing method is multi-point distribution and does not use a ring cavity for unified air supply, which cannot meet the directional air blowing requirements under the high-speed rotation state of the engraving electric spindle. Utility Model Content

[0006] The technical problem to be solved by this utility model is to overcome the shortcomings of the existing technology and provide a ring-shaped air knife for use on an engraving electric spindle. This structure can work stably under the condition of high-speed rotation of the engraving electric spindle. Through the cavity design, a uniform and directional high-pressure airflow is blown towards the cutter head area, effectively disturbing and blowing up the attached dust. At the same time, the dust collection system is used to improve the overall dust removal efficiency. Thus, under the premise of compact structure and low energy consumption, the dust in the processing area can be cleaned quickly, avoiding secondary pollution or tool damage caused by dust accumulation.

[0007] The technical solution adopted by this utility model to solve its technical problem is: an annular air knife applied on an engraving electric spindle, including an annular air knife installed outside the engraving electric spindle, the annular air knife including an upper cover and a lower cover, the upper cover and the lower cover are assembled to form an annular cavity, the outer side wall of the lower cover is provided with a plurality of air inlet joints for gas inflow; annular air outlets are provided at the inner edges of the upper cover and the lower cover.

[0008] Furthermore, the annular air outlet is an air outlet gap that is arranged obliquely in the radial direction along the annular cavity. The air outlet gap is defined by the inclined end faces of the upper cover and the lower cover arranged opposite to each other, and the inner edge of the upper cover extends towards the electric spindle side in the axial direction relative to the inner edge of the lower cover.

[0009] Furthermore, the diameter of the annular air knife is consistent with the diameter of the engraving electric spindle body.

[0010] Furthermore, the upper cover and the lower cover are connected by screws, and an axial sealing ring is provided between the upper cover and the lower cover.

[0011] Furthermore, the engraving electric spindle is equipped with a fan, which is connected to multiple air pipe connectors through a splitter connector. The multiple air pipe connectors are connected to multiple air inlet connectors on the annular air knife through multiple air pipes, so as to deliver the airflow output by the fan to the annular cavity.

[0012] Furthermore, the outer wall of the annular cavity is symmetrically provided with dust collection hood mounting brackets, and the annular air knife is mounted and fixed to the engraving electric spindle through the dust collection hood mounting brackets.

[0013] Furthermore, the engraving spindle is equipped with a vacuum cleaner that works in conjunction with the annular air knife. The vacuum cleaner is installed on the side of the engraving spindle, and the air inlet of the vacuum cleaner is oriented towards the annular air outlet.

[0014] The beneficial effects of this utility model are:

[0015] 1. This utility model, by setting an annular air knife structure on the outer periphery of the engraving electric spindle, can realize the directional air blowing function that rotates synchronously with the spindle, and promptly complete the cleaning of the workpiece surface. It is suitable for high-speed operation and improves the dynamic adaptability of the dust removal system.

[0016] 2. This utility model has an oblique conical annular air outlet on the inner side of the cavity, which allows the high-pressure airflow to be released evenly in the annular area, forming a blowing air field that covers the blade head area, making the dust removal range more concentrated and the efficiency higher.

[0017] 3. This utility model can use a DC brushless fan as the air source, which can provide a sufficient flow of high-pressure air while consuming a small amount of electricity, without relying on factory compressed air, thus reducing overall energy consumption.

[0018] 4. The air knife of this utility model is integrated into the dust collection hood structure, and the DC brushless motor is integrated into the outer wall of the motor housing. The two are connected by air pipes, air pipe connectors, and diverter connectors, which makes operation convenient and connection reliable.

[0019] 5. This utility model connects multiple air pipe joints to the air source of the fan, and combined with the diversion joint, multiple air supply paths can be flexibly configured to improve the economy and stability of operation. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0021] Figure 2 This is a top view of the structure of this utility model;

[0022] Figure 3 This is a cross-sectional structural schematic diagram of the present invention;

[0023] Figure 4 This is the utility model Figure 3 A magnified view of a section at point I;

[0024] In the diagram: 1-Annular air knife; 2-Upper cover; 3-Lower cover; 4-Annular cavity; 5-Air inlet connector; 6-Annular air outlet; 7-Sealing ring; 8-Fan; 9-Diverter connector; 10-Air pipe; 11-Air pipe connector; 12-Dust hood mounting bracket; 13-Dust collector; 14-Engraving electric spindle. Detailed Implementation

[0025] The present invention will now be further described with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the present invention, and therefore only show the components relevant to the present invention.

[0026] like Figure 1 As shown, this utility model provides an annular air knife applied to an engraving electric spindle. The annular air knife 1 is installed on the outer periphery of the front end of the engraving electric spindle 14 and is used to provide a stable and surrounding high-pressure airflow to the processing area of ​​the electric spindle head. A dust collector 13 is provided on the side of the engraving electric spindle 14, and its air inlet is arranged in the direction of the annular air outlet 6, which cooperates with the annular air knife 1: the air knife disturbs the dust and the dust collector simultaneously adsorbs it, thereby achieving synergistic dust removal.

[0027] like Figure 2As shown, the outer side wall of the annular air knife 1 is symmetrically provided with dust collection cover mounting brackets 11, which can be fixedly connected to the engraving electric spindle housing by screws. The structure is stable and easy to disassemble and maintain quickly.

[0028] like Figure 3 As shown, the annular air knife 1 is formed by assembling an upper cover 2 and a lower cover 3, which are fastened together with screws, and an axial sealing ring 7 is provided to ensure the cavity's airtightness. The upper cover 2 and the lower cover 3 together enclose a closed annular cavity 4. Figure 4 As shown, the upper cover 2 and the lower cover 3 have opposing inclined end faces in their inner edge areas, forming an annular air outlet 6 between the inclined surfaces. This air outlet 6 is radially inclined along the annular cavity 4, with its axial direction facing the engraving spindle 14, directing the airflow towards the spindle head area. This creates a stable, conical, diffused annular air curtain.

[0029] In practical work, such as Figure 1 As shown, the blower 8 provides high-pressure airflow. The airflow is distributed to multiple air pipes 10 via a splitter 9 (a three-way structure in this embodiment), and then connected to the air inlet 5 on the annular air knife 1 via multiple air pipe connectors 11. Compressed air from multiple directions converges in the annular cavity 4 to form a continuous, closed annular airflow, which is evenly distributed circumferentially inside the cavity and finally ejected at high speed from the annular outlet 6. Because the outlet 6 is annularly distributed and set at an angle, the ejected airflow will be sprayed radially and axially towards the electric spindle cutter head area at a certain angle, thereby inducing the formation of a low-pressure zone in the central area of ​​the outlet, i.e., around the spindle cutter head. This low-pressure zone will attract ambient air to be drawn in, so that the high-pressure airflow from the cavity and the induced free air together form a high-speed air curtain with annular circumferential characteristics. This air curtain is concentrated and blown inward in a conical shape within a 360° range around the annular air knife. This airflow area is directly facing the machining end of the spindle head, effectively agitating fine dust adhering to the workpiece surface, machining gaps, or edges, causing it to leave its original position and suspend in the airflow. Combined with... Figure 1 As shown, a vacuum cleaner 13 is provided on the side of the electric spindle 14, with its air inlet facing the blade head area. It can simultaneously suck in the disturbed and suspended dust, thereby achieving a highly efficient dust removal function with the combined blowing and suction.

[0030] It should be noted that the fan 8 used in this embodiment is a DC brushless fan, which has advantages such as low power consumption, high stability, and easy control. Of course, in actual applications, it can also be replaced with centrifugal fans, axial fans, etc., depending on the actual application scenario. In addition, the diverter 9 is not limited to a three-way structure, but can also be a two-way, four-way, or multi-way structure to match the number of air inlet connectors 5 set on the annular air knife 1. The changes in the above-mentioned fan type and connection form do not affect the basic working principle of this utility model and are still within the protection scope of this utility model.

[0031] The above embodiments are only for illustrating the technical concept and features of this utility model. Their purpose is to enable those skilled in the art to understand the content of this utility model and implement it. They should not be used to limit the protection scope of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be covered within the protection scope of this utility model.

Claims

1. A ring-shaped air knife for use on an engraving electric spindle, comprising a ring-shaped air knife mounted outside the engraving electric spindle, characterized in that: The annular air knife includes an upper cover and a lower cover, which are assembled to form an annular cavity. The outer wall of the lower cover is provided with multiple air inlet connectors for gas inflow. An annular air outlet is provided at the inner edge of the upper and lower covers. The annular air outlet is an air outlet gap that is arranged obliquely along the radial direction of the annular cavity. The air outlet gap is defined by the inclined end faces of the upper and lower covers that are arranged opposite to each other, and the inner edge of the upper cover extends axially toward the electric spindle side relative to the inner edge of the lower cover. A fan is provided on the engraving electric spindle. The fan is connected to multiple air pipe connectors through a splitter connector. The multiple air pipe connectors are connected to multiple air inlet connectors on the annular air knife through multiple air pipes, so as to deliver the airflow output by the fan into the annular cavity.

2. The annular air knife applied to an engraving electric spindle according to claim 1, characterized in that: The diameter of the annular air knife is consistent with the diameter of the engraving electric spindle body.

3. The annular air knife applied to an engraving electric spindle according to claim 1, characterized in that: The upper cover and the lower cover are connected by screws, and an axial sealing ring is provided between the upper cover and the lower cover.

4. The annular air knife applied to an engraving electric spindle according to claim 1, characterized in that: The outer wall of the annular cavity is symmetrically provided with dust collection hood mounting brackets, and the annular air knife is mounted and fixed to the engraving electric spindle through the dust collection hood mounting brackets.

5. The annular air knife applied to an engraving electric spindle according to claim 1, characterized in that: The engraving spindle is equipped with a vacuum cleaner that works in conjunction with the annular air knife. The vacuum cleaner is installed on the side of the engraving spindle, and the air inlet of the vacuum cleaner faces the annular air outlet.

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