Water cooling structure of motorized spindle machine tool

Abstract

The utility model relates to the field of machine tools, in particular to a water cooling structure of an electric spindle machine tool, which comprises a fixed seat and a spindle piece, a first cooling groove and a second cooling groove which are arranged in a circumferential array are arranged on the spindle piece, and a first water tank and a second water tank are detachably arranged on the spindle piece. Circumferential array circulation hoses are arranged between the first water tank and the second water tank. The first cooling groove and the second cooling groove which are not communicated with each other are arranged on the main shaft piece, so that the influence on the mechanical strength of the main shaft caused by a traditional hole channel communicated with two ends is effectively avoided, the rigid strength of the main shaft piece is ensured not to be damaged, the first water tank and the second water tank are connected through the circulating hose, and the bending part is designed in the circulating hose; the cooling liquid can fully absorb heat generated by the main shaft in the flowing process, the cooling efficiency is improved, and the problems that in the prior art, due to the straight design of the hole channels, the cooling water staying time is short, and the cooling effect is poor are solved.

Description

Technical Field

[0001] This utility model relates to the field of machine tool technology, specifically to a water cooling structure for an electric spindle machine tool. Background Technology

[0002] A machine tool spindle is the shaft on a machine tool that drives the workpiece or cutting tool to rotate. It is usually composed of a spindle, bearings, and transmission components (gears or pulleys). In a machine, it is mainly used to support transmission parts such as gears and pulleys and transmit motion and torque, such as a machine tool spindle. Some are used to clamp workpieces, such as spindles. Except for machine tools such as planers and broaching machines where the main motion is linear, most machine tools have a spindle component. Spindles generate a lot of heat during long-term operation, which affects their lifespan. Therefore, additional structures are needed to cool the spindle.

[0003] Chinese patent CN210648523U discloses a water-cooling structure for an electric spindle. It processes the spindle sleeve by creating channels, which ensures effective cooling of the electric spindle while maintaining the mechanical strength of the spindle sleeve. By replacing the external spiral channel with channels in the spindle sleeve, the manufacturing process and cost of the electric spindle are reduced. Furthermore, the integral spindle sleeve section has higher rigidity and better cooling effect.

[0004] The above solution involves opening multiple channels on the spindle and using water flowing through the channels to achieve cooling. However, the interconnected channels at both ends still affect the strength of the spindle. Furthermore, due to the straight design of the channels, the cooling water stays on the spindle for a short time, resulting in a high waste rate of cooling water.

[0005] Therefore, this utility model provides a water cooling structure for an electric spindle machine tool to solve the above problems. Utility Model Content

[0006] In view of the above situation and to overcome the defects of the prior art, this utility model provides a water cooling structure for an electric spindle machine tool, so as to solve the problem that the connection between the two ends of the channel still affects the strength of the spindle, and that the cooling water has a short residence time on the spindle due to the straight design of the channel, resulting in a high waste rate of cooling water.

[0007] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0008] A water cooling structure for an electric spindle machine tool includes a fixed base and a spindle assembly. The spindle assembly has a first cooling groove and a second cooling groove arranged in a circumferential array. A first water tank and a second water tank are detachably installed on the spindle assembly. A circulating flexible tube arranged in a circumferential array is provided between the first water tank and the second water tank. The two ends of the circulating flexible tube are respectively fixedly connected to the first water tank and the second water tank. A bend is provided in the middle section of the circulating flexible tube, and the bend matches the first water tank and the second water tank.

[0009] Preferably, the first water tank is fixedly connected to a water inlet pipe, and the second water tank is fixedly connected to a water outlet pipe.

[0010] Preferably, a connecting block is fixedly connected to both the first water tank and the second water tank, and a locking bolt is threaded onto the connecting block. A fixing screw hole is opened on the main shaft, and one end of the locking bolt is threaded into the fixing screw hole.

[0011] Preferably, a shield is fitted onto the main shaft, and the two ends of the shield are respectively fixedly connected to the first water tank and the second water tank.

[0012] Preferably, the shield is fixedly connected to an air inlet pipe and an air outlet pipe, and the connection points between the air inlet pipe and the air outlet pipe and the shield are located on the tangent line of the shield.

[0013] Preferably, the inner wall of the shield is fixedly connected with guide rings arranged at equal intervals.

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

[0015] 1. By setting a non-connected first and second cooling groove on the spindle, the influence of the traditional two-end connected channel on the mechanical strength of the spindle is effectively avoided, ensuring that the rigidity of the spindle is not damaged. Furthermore, the first and second water tanks are connected by a flow hose, and a bend is designed in the flow hose so that the coolant can fully absorb the heat generated by the spindle during the flow process, thereby improving the cooling efficiency and solving the problem of short residence time of cooling water and poor cooling effect caused by the straight channel design in the prior art.

[0016] 2. By installing air inlet and exhaust pipes on the shield and using guide rings to promote the spiral upward flow of air, the heat exchange area between the air and the spindle components is increased, further enhancing the overall heat dissipation performance. Combined with the dual cooling mechanism of water cooling and air cooling, the temperature of the spindle during operation can be effectively reduced. Attached Figure Description

[0017] Figure 1 This is a perspective view of the overall structure of this utility model.

[0018] Figure 2This is a perspective view of the present invention after the shielding cover has been removed.

[0019] Figure 3 This is a cross-sectional view of the present invention.

[0020] Figure 4 This utility model Figure 3 An enlarged schematic diagram of the structure at point A in the middle.

[0021] In the diagram: 1. Fixed base; 2. Main shaft; 3. First cooling tank; 4. Second cooling tank; 5. First water tank; 6. Second water tank; 7. Flow hose; 8. Bend; 9. Water inlet pipe; 10. Drain pipe; 11. Shield; 12. Air inlet pipe; 13. Air outlet pipe; 14. Guide ring; 15. Connecting block; 16. Locking bolt; 17. Fixing screw hole. Detailed Implementation

[0022] The following will refer to the attached reference. Figures 1 to 4 The various embodiments of this utility model will be described in detail below. Those skilled in the art should understand that these embodiments are merely illustrative of the technical principles of this utility model and are not intended to limit the scope of protection of this utility model.

[0023] A water-cooling structure for an electric spindle machine tool, such as Figures 1 to 4 As shown, the device includes a fixed base 1 and a spindle 2. Both the fixed base 1 and the spindle 2 are existing structures. The fixed base 1 is connected to the spindle 2, and the spindle 2 is fixed by mounting the fixed base 1 on the machine tool. The spindle 2 has a first cooling groove 3 and a second cooling groove 4 arranged in a circumferential array. The first cooling groove 3 and the second cooling groove 4 are non-connected grooves, and the first cooling groove 3 and the second cooling groove 4 are located close to both ends of the spindle 2, which can ensure the heat dissipation effect of the spindle 2 without affecting its own strength. The spindle 2 is detachably equipped with a first water tank 5 and a second water tank 6. The first water tank 5 and the second water tank 6 are both hollow annular rings, and the inner walls of the first water tank 5 and the second water tank 6 are both in contact with the spindle 2.

[0024] Connecting blocks 15 are fixedly connected to both the first water tank 5 and the second water tank 6. Locking bolts 16 are threaded onto the connecting blocks 15. The main shaft 2 has a fixing screw hole 17, and one end of the locking bolt 16 is threaded into the fixing screw hole 17. When fixing the first water tank 5 and the second water tank 6, the locking bolt 16 needs to be moved threadedly on the connecting blocks 15, and one end of the locking bolt 16 needs to be screwed into the fixing screw hole 17 to complete the fixing of the first water tank 5 and the second water tank 6.

[0025] A water inlet pipe 9 is fixedly connected to the first water tank 5, through which coolant is injected into the first water tank 5. A drain pipe 10 is fixedly connected to the second water tank 6, through which the coolant collected in the second water tank 6 after absorbing heat is discharged. A circular array of flexible flow hoses 7 is provided between the first water tank 5 and the second water tank 6. The two ends of the flexible flow hoses 7 are fixedly connected to the first water tank 5 and the second water tank 6, respectively. A bend 8 is provided in the middle section of the flexible flow hoses 7, and the bend 8 matches the first water tank 5 and the second water tank 6.

[0026] The coolant in the first water tank 5 will enter the second water tank 6 through the flow hose 7, and the coolant in the flow hose 7 will absorb the heat on the spindle 2 in the bend 8.

[0027] A shield 11 is fitted on the main shaft component 2. The two ends of the shield 11 are fixedly connected to the first water tank 5 and the second water tank 6, respectively. The shield 11 forms a barrier that can close the cooling network formed by the flow hose 7.

[0028] An air inlet pipe 12 and an air outlet pipe 13 are fixedly connected to the shield 11, and the connection between the air inlet pipe 12 and the air outlet pipe 13 and the shield 11 is located on the tangent of the shield 11. Clean air from the outside is delivered to the shield 11 through the air inlet pipe 12, so that the air absorbs heat and is discharged from the shield 11 through the air outlet pipe 13.

[0029] The inner wall of the shield 11 is fixedly connected with guide rings 14 arranged at equal intervals. The guide rings 14 are used to guide the air entering the shield 11, and the air is discharged after absorbing heat in a spiral upward manner.

[0030] It should be noted that in the description of this utility model, terms such as "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," which indicate direction or positional relationships, are based on the direction or positional relationships shown in the accompanying drawings. These are used merely for ease of description and do not indicate or imply that the device or element 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. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0031] Furthermore, it should be noted that, in the description of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0032] The technical solution of this utility model has been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the protection scope of this utility model is obviously not limited to these specific embodiments. Without departing from the principle of this utility model, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will all fall within the protection scope of this utility model.

Claims

1. A water-cooling structure for an electric spindle machine tool, comprising a fixed base (1) and a spindle component (2), characterized in that, The main shaft (2) is provided with a first cooling groove (3) and a second cooling groove (4) arranged in a circular array. A first water tank (5) and a second water tank (6) are detachably installed on the main shaft (2). A circulating hose (7) arranged in a circular array is provided between the first water tank (5) and the second water tank (6). The two ends of the circulating hose (7) are respectively fixedly connected to the first water tank (5) and the second water tank (6). A bend (8) is provided in the middle section of the circulating hose (7), and the bend (8) matches the first water tank (5) and the second water tank (6).

2. The water-cooling structure for an electric spindle machine tool according to claim 1, characterized in that, The first water tank (5) is fixedly connected to a water inlet pipe (9), and the second water tank (6) is fixedly connected to a drain pipe (10).

3. The water-cooling structure for an electric spindle machine tool according to claim 1, characterized in that, A connecting block (15) is fixedly connected to both the first water tank (5) and the second water tank (6). A locking bolt (16) is threaded onto the connecting block (15). A fixing screw hole (17) is opened on the main shaft (2), and one end of the locking bolt (16) is threaded into the fixing screw hole (17).

4. The water-cooling structure for an electric spindle machine tool according to claim 1, characterized in that, The main shaft (2) is fitted with a shield (11), and the two ends of the shield (11) are fixedly connected to the first water tank (5) and the second water tank (6) respectively.

5. The water cooling structure for an electric spindle machine tool according to claim 4, characterized in that, The shield (11) is fixedly connected to an air inlet pipe (12) and an air outlet pipe (13), and the connection between the air inlet pipe (12) and the air outlet pipe (13) and the shield (11) is located on the tangent of the shield (11).

6. The water cooling structure for an electric spindle machine tool according to claim 4, characterized in that, The inner wall of the shield (11) is fixedly connected with guide rings (14) arranged at equal intervals.

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