A high-power electric spindle for a carving machine

Abstract

The utility model relates to electric main shaft technical field especially relates to a high -power electric main shaft for engraver, including the shell, the outer surface fixed cover of shell has the air -cooled component, shell left -hand end fixedly connected with the front cover, shell right -hand end fixedly connected with the back cover, shell in, the front cover in and the back cover in jointly install electric main shaft body, a high -power electric main shaft for engraver, the air -cooled component cooperations helical cooling water pipe and realizes high -efficient heat dissipation, and the stator winding of electric main shaft body produces rotating magnetic field and drives the high -speed rotation of rotor and main shaft core, and two groups of precision bearing group guarantee main shaft core smooth operation, reduce radial runout, and the front cover forms the closed protective space with the back cover, and the ventilation groove of back cover cooperates dust screen and prevents dust while radiating heat, as a whole, this electric main shaft can realize the stable operation of high -power, high -speed engraving operation, guarantees the machining accuracy, and prolongs the service life of equipment, and adapts the precise machining scene of many fields.

Description

Technical Field

[0001] This utility model relates to the field of electric spindle technology, and in particular to an electric spindle for a high-power engraving machine. Background Technology

[0002] Electric spindles are used in high-speed, high-precision, and high-power engraving equipment. They are the core functional components of CNC engraving machines and can directly drive cutting tools to complete precision machining tasks such as engraving, drilling, and milling in fields such as advertising signs, wood carving, metal molds, and aerospace parts.

[0003] However, traditional CNC engraving machine spindles rely on a single cooling method (water cooling or air cooling). During high-power, high-speed operation, the heat generated by the stator windings and precision bearings is difficult to dissipate quickly, easily causing thermal deformation of the spindle core. At the same time, uneven stress on the precision bearings exacerbates wear, affecting not only the engraving accuracy but also shortening the overall lifespan of the spindle. Therefore, we have introduced a high-power CNC engraving machine spindle. Utility Model Content

[0004] The main purpose of this utility model is to provide a high-power electric spindle for engraving machines, which can effectively solve the problems in the background art.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows: A high-power engraving machine spindle includes a housing, an air-cooling assembly fixedly fitted onto the outer surface of the housing, a front cover fixedly connected to the left end of the housing, a rear cover fixedly connected to the right end of the housing, and the spindle body installed inside the housing, the front cover, and the rear cover.

[0006] Preferably, the outer shell includes an end cap, a plurality of first screw holes are opened at the left edge of the end cap, and an outer shell body is fixedly connected to the right edge of the end cap. A spiral cooling water pipe is fixedly sleeved inside the outer shell body, and an inner shell is fixedly sleeved inside the spiral cooling water pipe. An inner shell is opened on the outer surface of the outer shell body with an internal and external through mounting groove, and an internal and external through pipe hole is opened on the outer surface of the inner shell.

[0007] By adopting the above technical solution, the outer shell and the inner shell form a double-layer structure, providing installation space for the spiral cooling water pipe and realizing water cooling heat dissipation.

[0008] Preferably, the air-cooled component includes a fixed frame, in which a negative pressure fan is fixedly installed, a connecting cover is fixedly connected to the upper end of the fixed frame, a first air duct is inserted and fixedly connected to the right end of the connecting cover, and a second air duct is inserted and fixedly connected to the lower end of the fixed frame.

[0009] By adopting the above technical solution: the negative pressure fan can generate directional airflow, the first air duct is used to draw in outside cold air, and the second air duct is responsible for delivering the cold air to the inside of the electric spindle. The whole constitutes a complete air-cooled airflow channel to achieve air-cooled heat dissipation of the internal components of the electric spindle.

[0010] Preferably, the lower part of the fixing frame is fixedly sleeved in the mounting groove, and the second air duct is fixedly sleeved in the pipe hole.

[0011] By adopting the above technical solution, the sleeve connection between the second air duct and the pipe hole ensures that cold air can be delivered to the inside of the shell, ensuring that the air-cooled airflow can smoothly enter the heat dissipation area and improving the synergistic heat dissipation effect of air cooling and water cooling.

[0012] Preferably, the front cover includes a front cover body and bolts, and a plurality of second screw holes that pass through to the left and right are opened at the right edge of the front cover body.

[0013] By adopting the above technical solution, the front cover body can seal and protect the left end of the electric spindle, preventing dust and chips from entering the interior and affecting the operation of the components.

[0014] Preferably, a plurality of bolts are provided, and the outer surfaces of the plurality of bolts are respectively threaded to the inner wall of the corresponding second screw hole and extend into the corresponding first screw hole.

[0015] By adopting the above technical solution, the bolts are connected by threads and simultaneously adapt to the second screw hole of the front cover and the first screw hole of the outer casing end cover, so that the front cover and the outer casing can be detachably fixed, the connection is firm and convenient for subsequent maintenance and disassembly.

[0016] Preferably, the back cover includes a back cover body, the right end of which has a plurality of ventilation slots, the inner wall of which is embedded with a dustproof mesh, and the left end of the back cover body is fixedly connected to the right end of the outer shell body.

[0017] By adopting the above technical solution: the rear cover protects the right end of the electric spindle, the ventilation slot allows the internal hot air to be discharged smoothly, realizing the circulation of heat dissipation airflow, and the dustproof net can block external dust and impurities from entering the interior through the ventilation slot.

[0018] Preferably, the electric spindle body includes a spindle core, stator windings, a rotor, and a precision bearing assembly; The stator winding is fixedly sleeved on the inner wall of the inner shell, and the rotor is fixedly sleeved on the middle of the outer surface of the main shaft core and located inside the stator winding. The precision bearing assembly is provided in two sets. The two sets of precision bearing assemblies are respectively fixedly sleeved on the left and right sides of the outer surface of the main shaft core, and the outer rings of the two sets of precision bearing assemblies are respectively fixedly connected to the inner wall surface of the front cover and the inner wall surface of the rear cover. The left end of the main spindle penetrates the left end of the front cover and extends to the left side of the front cover, while the right end of the main spindle extends into the rear cover.

[0019] By adopting the above technical solution: the stator winding is energized to generate a rotating magnetic field, which drives the rotor to rotate the spindle core at high speed, providing power for engraving. Two sets of precision bearings support the spindle core from the left and right ends respectively, ensuring that the spindle core rotates smoothly without deviation at high speed and reducing radial runout.

[0020] Compared with the prior art, the present invention has the following beneficial effects: In this invention, the negative pressure fan of the air-cooling component draws in cold air through the first air duct and delivers it to the inner shell through the second air duct. At the same time, coolant is introduced into the spiral cooling water pipe of the outer shell. The two work together to achieve efficient heat dissipation. The stator winding of the electric spindle body is energized to generate a rotating magnetic field, which drives the rotor and spindle core to rotate at high speed. Two sets of precision bearings ensure the smooth operation of the spindle core and reduce radial runout. The front cover and the rear cover form a closed protective space. The ventilation slot of the rear cover, together with the dustproof net, not only dissipates heat but also blocks external dust. Overall, this electric spindle can achieve stable operation of high-power, high-speed engraving operations, which not only ensures processing accuracy but also extends the service life of the equipment, making it suitable for precision processing scenarios in multiple fields. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of a high-power engraving machine electric spindle according to the present invention; Figure 2 This is a schematic diagram of the housing of a high-power engraving machine spindle according to the present invention; Figure 3 This is a cross-sectional view of the housing of a high-power engraving machine spindle according to the present invention (the end cap and the housing body are cut out). Figure 4 This is a cross-sectional view of the air-cooled assembly of a high-power engraving machine spindle according to the present invention (the connecting cover is cut out). Figure 5 This is an exploded view of the structure of the front cover of a high-power engraving machine spindle according to the present invention; Figure 6 This is a schematic diagram of the structure of the rear cover of a high-power engraving machine spindle according to the present invention.

[0022] In the diagram: 1. Outer shell; 2. Air-cooled assembly; 3. Front cover; 4. Rear cover; 5. Electric spindle body; 11. End cover; 12. First screw hole; 13. Outer shell body; 14. Spiral cooling water pipe; 15. Inner shell; 16. Mounting slot; 17. Pipe hole; 21. Fixing frame; 22. Negative pressure fan; 23. Connecting cover; 24. First air duct; 25. Second air duct; 31. Front cover body; 32. Bolt; 33. Second screw hole; 41. Rear cover body; 42. Ventilation slot; 43. Dustproof net. Detailed Implementation

[0023] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0024] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0025] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," and "connected," etc., should be interpreted broadly. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0026] Please see Figure 1-6 This utility model provides a technical solution: A high-power engraving machine spindle includes a housing 1, a cooling assembly 2 fixedly sleeved on the outer surface of the housing 1, a front cover 3 fixedly connected to the left end of the housing 1, a rear cover 4 fixedly connected to the right end of the housing 1, and an electric spindle body 5 installed inside the housing 1, the front cover 3, and the rear cover 4.

[0027] In this embodiment, the outer shell 1 includes an end cap 11, with several first screw holes 12 at the left edge of the end cap 11, and an outer shell body 13 fixedly connected to the right edge of the end cap 11. A spiral cooling water pipe 14 is fixedly sleeved inside the outer shell body 13, and an inner shell 15 is fixedly sleeved inside the spiral cooling water pipe 14. An inner shell 15 is fixedly sleeved inside the spiral cooling water pipe 14. An inner through-hole 16 is opened on the outer surface of the outer shell body 13, and an inner through-hole 17 is opened on the outer surface of the inner shell 15. The air-cooled assembly 2 includes a fixing frame 21. A negative pressure fan 22 is fixedly installed inside the frame 21. A connecting cover 23 is fixedly connected to the upper end of the frame 21. A first air duct 24 is fixedly connected to the right end of the connecting cover 23. A second air duct 25 is fixedly connected to the lower end of the frame 21. The lower part of the frame 21 is fixedly fitted into the mounting groove 16, and the second air duct 25 is fixedly fitted into the pipe hole 17. The front cover 3 includes a front cover body 31 and bolts 32. Several second screw holes 33 are opened at the right edge of the front cover body 31. The 32 is provided with several bolts, the outer surfaces of which are threaded to the inner walls of the corresponding second screw holes 33 and extend into the corresponding first screw holes 12; the rear cover 4 includes a rear cover body 41, the right end of which has several ventilation slots 42, the inner walls of which are each embedded with a dustproof mesh 43, and the left end of the rear cover body 41 is fixedly connected to the right end of the outer shell body 13; the electric spindle body 5 includes a spindle core, stator windings, rotor and precision bearing assembly. The stator winding is fixedly sleeved on the inner wall of the inner shell 15, and the rotor is fixedly sleeved on the middle of the outer surface of the main shaft core and located inside the stator winding; two sets of precision bearings are provided, and the two sets of precision bearings are fixedly sleeved on the left and right sides of the outer surface of the main shaft core, respectively, and the outer rings of the two sets of precision bearings are fixedly connected to the inner wall of the front cover 3 and the inner wall of the rear cover 4, respectively; the left end of the main shaft core passes through the left end of the front cover 3 and extends to the left side of the front cover 3, and the right end of the main shaft core extends into the rear cover 4.

[0028] It should be noted that this utility model is an electric spindle for a high-power engraving machine. In use, the air-cooling assembly 2 on the outer surface of the outer shell 1 is first activated. The negative pressure fan 22 inside its fixed frame 21 operates, drawing in outside cold air through the first air duct 24 at the right end of the connecting cover 23. The cold air is then transported to the interior of the inner shell 15 through the second air duct 25 at the lower end of the fixed frame 21. Simultaneously, coolant is introduced through the spiral cooling water pipe 14 inside the outer shell 13, working in conjunction with the air cooling to cool the internal components. Subsequently, the stator windings of the electric spindle body 5 are energized to generate a rotating magnetic field, driving the rotor sleeved on the outer surface of the spindle core. The rotation drives the spindle core to rotate synchronously at high speed. Two sets of precision bearings on the left and right sides of the outer surface of the spindle core ensure smooth rotation of the spindle core and reduce radial runout. The left end of the spindle core extends out of the front cover 3 and clamps the tool. The tool completes the engraving process by rotating with the spindle core. During the processing, part of the heat generated is carried away by the coolant in the spiral cooling water pipe 14, and the other part is absorbed by the airflow of the air-cooling component 2 and discharged from the ventilation slot 42 of the rear cover 4. The dustproof net 43 in the ventilation slot 42 can prevent external dust from entering the device. The whole system achieves stable operation of high-power, high-speed engraving.

[0029] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A high-power engraving machine spindle, comprising a housing (1), characterized in that: The outer surface of the outer shell (1) is fixedly fitted with a wind-cooling assembly (2), the left end of the outer shell (1) is fixedly connected with a front cover (3), the right end of the outer shell (1) is fixedly connected with a rear cover (4), and the electric spindle body (5) is installed in the outer shell (1), the front cover (3) and the rear cover (4). The outer shell (1) includes an end cap (11), with several first screw holes (12) at the left edge of the end cap (11), and an outer shell body (13) fixedly connected to the right edge of the end cap (11). A spiral cooling water pipe (14) is fixedly sleeved inside the outer shell body (13), and an inner shell (15) is fixedly sleeved inside the spiral cooling water pipe (14). An inner mounting groove (16) with through-holes is opened on the outer surface of the outer shell body (13), and a pipe hole (17) with through-holes is opened on the outer surface of the inner shell (15).

2. The high-power engraving machine spindle according to claim 1, characterized in that: The air-cooled component (2) includes a fixed frame (21), a negative pressure fan (22) is fixedly installed inside the fixed frame (21), a connecting cover (23) is fixedly connected to the upper end of the fixed frame (21), a first air duct (24) is inserted and fixedly connected to the right end of the connecting cover (23), and a second air duct (25) is inserted and fixedly connected to the lower end of the fixed frame (21).

3. The high-power engraving machine spindle according to claim 2, characterized in that: The lower part of the fixed frame (21) is fixedly sleeved in the mounting groove (16), and the second air duct (25) is fixedly sleeved in the pipe hole (17).

4. The high-power engraving machine spindle according to claim 1, characterized in that: The front cover (3) includes a front cover body (31) and bolts (32). Several second screw holes (33) are opened at the right edge of the front cover body (31).

5. The high-power engraving machine spindle according to claim 4, characterized in that: The bolts (32) are provided in a plurality of manner, and the outer surfaces of the plurality of bolts (32) are respectively threaded to the inner wall of the corresponding second screw hole (33) and respectively extend into the corresponding first screw hole (12).

6. The high-power engraving machine spindle according to claim 1, characterized in that: The back cover (4) includes a back cover body (41), and the right end of the back cover body (41) has several ventilation slots (42). The inner wall of each ventilation slot (42) is embedded with a dustproof net (43). The left end of the back cover body (41) is fixedly connected to the right end of the outer shell body (13).

7. The high-power engraving machine spindle according to claim 1, characterized in that: The electric spindle body (5) includes a spindle core, stator windings, rotor and precision bearing assembly; The stator winding is fixedly sleeved on the inner wall of the inner shell (15), and the rotor is fixedly sleeved on the middle of the outer surface of the main shaft core and located inside the stator winding. The precision bearing assembly is provided in two sets. The two sets of precision bearing assemblies are respectively fixedly sleeved on the left and right sides of the outer surface of the main shaft core, and the outer rings of the two sets of precision bearing assemblies are respectively fixedly connected to the inner wall surface of the front cover (3) and the inner wall surface of the rear cover (4). The left end of the main spindle penetrates the left end of the front cover (3) and extends to the left side of the front cover (3), while the right end of the main spindle extends into the rear cover (4).

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