Main shaft of numerical control machining center

Abstract

The utility model belongs to the technical field of numerical control lathes, and particularly relates to a numerical control machining center spindle which comprises a spindle box body, a spindle motor arranged in the spindle box body and a spiral convex rib wound on the peripheral side of the spindle motor, and a spiral water cooling channel is formed among the inner wall of the spindle box body, the outer side wall of the spindle motor and the spiral convex rib. A cooling water inlet and a cooling water outlet which penetrate through the spindle box body and are communicated with the spiral water cooling channel are formed in the two ends of the spindle box body respectively, and in the using process, cooling water enters the spiral water cooling channel from the cooling water inlet and is discharged from the cooling water outlet, and the cooling water takes away heat generated on the peripheral side of the spindle motor when flowing in the spiral water cooling channel. And meanwhile, the end, close to the cooling water outlet, of the spindle box body is sleeved with the buckle, the buckle is provided with the cooling fins, heat dissipation is conducted on the end, close to the cooling water outlet, of the spindle box body through the cooling fins, and the overall heat dissipation effect is better.

Description

Technical field

[0001] The utility model belongs to the technical field of numerical control lathes, in particular to a main shaft of a numerical control machining center. [Background Technology]

[0002] The operation of the motor generates a very large heat source, which can cause the temperature of the electric spindle body to be very high. When the spindle temperature is high, thermal expansion and contraction occur, which can cause the bearing preload to fail, leading to bearing damage. Severe temperature rise can directly cause the electric spindle motor to burn out. The current common method of cooling is through water cooling. For example, a water tank is built into the electric spindle housing and water is supplied to cool it by flowing through the tank. However, as the water temperature gradually increases as it flows from the water inlet to the water outlet, the heat dissipation effect at the outlet end of the electric spindle housing is insufficient. [Utility Model Content]

[0003] In response to the problems raised in the background technology, the utility model provides a CNC machining center spindle with better heat dissipation effect.

[0004] The utility model is realized by the following technical solutions:

[0005] A spindle for a CNC machining center comprises a spindle housing, a spindle motor arranged in the spindle housing, and spiral ribs arranged around the circumference of the spindle motor. A spiral water cooling channel is formed between the inner wall of the spindle housing, the outer wall of the spindle motor and the spiral ribs. A cooling water inlet and a cooling water outlet are respectively provided at both ends of the spindle housing, which pass through the spindle housing and are connected to the spiral water cooling channel. A ring buckle is provided on the end of the spindle housing close to the cooling water outlet, and a heat sink is provided on the ring buckle.

[0006] In the CNC machining center spindle as described above, the spiral ribs are integrally formed on the inner wall of the spindle housing.

[0007] In the spindle of a CNC machining center as described above, sealing rings are respectively provided between the spindle housing and the spindle motor and at both ends of the spiral water cooling channel.

[0008] In the spindle of a CNC machining center as described above, an air-cooling device is provided on the heat sink.

[0009] As described above, a CNC machining center spindle has multiple heat sinks, and mounting grooves are formed between adjacent heat sinks. The air-cooled heat dissipation device includes an air-cooled mounting frame and a fan arranged in the air-cooled mounting frame. Mounting bolts are provided at the four corners of the air-cooled mounting frame, and one end of the mounting bolts is installed in the mounting groove to fix the air-cooled mounting frame.

[0010] As described above, in the spindle of a CNC machining center, the two ends of the spindle housing are detachably mounted with a front end cover and a motor cover, and the end of the motor cover away from the spindle housing is detachably mounted with a rear end cover.

[0011] As described above, in a CNC machining center spindle, a first rotating bearing is provided at one end of the spindle housing close to the front end cover, a second rotating bearing is provided on the motor cover, and both ends of the rotating shaft of the spindle motor pass through the first rotating bearing and the second rotating bearing respectively.

[0012] Compared with the prior art, the utility model has the following advantages:

[0013] The utility model provides a spindle of a CNC machining center, comprising a spindle housing, a spindle motor arranged in the spindle housing, and spiral ribs arranged around the circumference of the spindle motor. A spiral water-cooling channel is formed between the inner wall of the spindle housing, the outer wall of the spindle motor and the spiral ribs. A cooling water inlet and a cooling water outlet are respectively provided at both ends of the spindle housing, which penetrate the spindle housing and are connected to the spiral water-cooling channel. When in use, cooling water enters the spiral water-cooling channel from the cooling water inlet and is discharged from the cooling water outlet. When the cooling water flows in the spiral water-cooling channel, it takes away the heat generated around the spindle motor to achieve heat dissipation. At the same time, a ring buckle is provided on one end of the spindle housing close to the cooling water outlet, and a heat sink is provided on the ring buckle. The heat dissipation of the end of the spindle housing close to the cooling water outlet is performed through the heat sink, so that the overall heat dissipation effect is better.

Brief Description of the Drawings

[0014] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments.

[0015] Figure 1 This is a schematic diagram of the structure of the spindle of the CNC machining center in a specific embodiment of the present utility model;

[0016] Figure 2 This is a schematic diagram of the structure of the spindle of the CNC machining center in a specific embodiment of the present utility model;

[0017] Figure 3 This is a schematic cross-sectional view of the spindle of a CNC machining center in a specific embodiment of the present invention;

[0018] Figure 4 This is a structural diagram of the spindle housing in a specific embodiment of the present invention;

[0019] Figure 5 It is a schematic structural diagram of the ring buckle, heat sink and air-cooling heat dissipation device in a specific embodiment of the present invention. [Specific implementation method]

[0020] In order to make the technical problems, technical solutions and beneficial effects solved by the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0021] When the embodiments of the present invention mention ordinal numbers such as "first" and "second", unless they do express the meaning of order according to the context, they should be understood as being merely for the purpose of distinction.

[0022] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0023] Specific embodiments, such as Figure 1-5 The spindle of a CNC machining center shown in the figure includes a spindle housing 1, a spindle motor 2 arranged in the spindle housing 1, and a spiral rib 3 arranged around the circumference of the spindle motor 2. A spiral water-cooling channel 4 is formed between the inner wall of the spindle housing 1, the outer wall of the spindle motor 2 and the spiral rib 3. A cooling water inlet 51 and a cooling water outlet 52 are respectively provided at both ends of the spindle housing 1, which pass through the spindle housing 1 and are connected to the spiral water-cooling channel 4. A ring buckle 6 is provided on the end of the spindle housing 1 close to the cooling water outlet 52, and a heat sink 7 is provided on the ring buckle 6. When in use, cooling water enters the spiral water-cooling channel from the cooling water inlet and is discharged from the cooling water outlet. When the cooling water flows in the spiral water-cooling channel, it takes away the heat generated on the circumference of the spindle motor to achieve heat dissipation. At the same time, a ring buckle is provided on the end of the spindle housing close to the cooling water outlet, and a heat sink is provided on the ring buckle. The heat dissipation of the end of the spindle housing close to the cooling water outlet is carried out by the heat sink, so that the overall heat dissipation effect is better. The inner wall of the ring buckle 6 is tightly matched with the outer wall of the spindle housing 1 and can be fixed to the spindle housing 1 by bolt connection or welding.

[0024] Specifically, the spiral rib 3 is integrally formed on the inner wall of the spindle housing 1, which has lower costs and a more stable structure.

[0025] In addition, in order to prevent cooling water from entering the spindle motor 2, sealing rings 8 are respectively provided between the spindle housing 1 and the spindle motor 2 and at both ends of the spiral water cooling channel 4. The sealing rings 8 are O-rings.

[0026] In order to further improve the heat dissipation performance, an air cooling device 9 is provided on the heat sink 7. The air cooling device 9 can blow cold air toward the spindle housing 1 to dissipate heat, or the air cooling device 9 can remove heat from the heat sink 7.

[0027] More specifically, there are multiple heat sinks 7, and mounting grooves 10 are formed between adjacent heat sinks 7. The air-cooled heat dissipation device 9 includes an air-cooled mounting frame 91 and a fan 92 arranged in the air-cooled mounting frame 91. Mounting bolts 93 are provided at the four corners of the air-cooled mounting frame 91. One end of the mounting bolt 93 is installed in the mounting groove 10 to fix the air-cooled mounting frame 91. The air-cooled mounting frame 91 is convenient for disassembly and replacement, and the installation is stable.

[0028] Furthermore, a front end cover 11 and a motor cover 12 are detachably mounted on both ends of the spindle housing 1 , and a rear end cover 13 is detachably mounted on one end of the motor cover 12 away from the spindle housing 1 , which facilitates disassembly, assembly and replacement.

[0029] Furthermore, a first rotating bearing 14 is provided at one end of the spindle housing 1 close to the front end cover 11, and a second rotating bearing 15 is provided on the motor cover 12. Both ends of the rotating shaft of the spindle motor 2 pass through the first rotating bearing 14 and the second rotating bearing 15 respectively, so that the spindle motor 2 works more stably and with less noise.

[0030] The above is an implementation method provided in conjunction with specific content, and does not necessarily mean that the specific implementation of this utility model is limited to these descriptions. At the same time, due to differences in industry nomenclature, it is not limited to the above nomenclature, nor is it limited to English nomenclature. Any method, structure, etc. similar to or identical to the method, structure, etc. of this utility model, or any technical deduction or replacement based on the concept of this utility model, shall be considered within the scope of protection of this utility model.

Claims

1. A CNC machining center spindle, characterized in that: The invention comprises a spindle housing (1), a spindle motor (2) arranged in the spindle housing (1), and a spiral rib (3) arranged around the circumference of the spindle motor (2); a spiral water cooling channel (4) is formed between the inner wall of the spindle housing (1), the outer wall of the spindle motor (2) and the spiral rib (3); a cooling water inlet (51) and a cooling water outlet (52) are respectively provided at both ends of the spindle housing (1), which pass through the spindle housing (1) and are connected to the spiral water cooling channel (4); a ring buckle (6) is provided on one end of the spindle housing (1) close to the cooling water outlet (52); and a heat sink (7) is provided on the ring buckle (6).

2. A CNC machining center spindle according to claim 1, characterized in that: The spiral rib (3) is integrally formed on the inner wall of the spindle housing (1).

3. The CNC machining center spindle according to claim 1, characterized in that: Sealing rings (8) are respectively provided between the spindle housing (1) and the spindle motor (2) and at both ends of the spiral water cooling channel (4).

4. The CNC machining center spindle according to claim 1, characterized in that: An air-cooling heat dissipation device (9) is provided on the heat sink (7).

5. The CNC machining center spindle according to claim 4, characterized in that: There are a plurality of heat sinks (7), and mounting grooves (10) are formed between adjacent heat sinks (7). The air-cooling heat dissipation device (9) comprises an air-cooling mounting frame (91) and a fan (92) arranged in the air-cooling mounting frame (91). Mounting bolts (93) are provided at four corners of the air-cooling mounting frame (91), and one end of the mounting bolt (93) is mounted in the mounting groove (10) to fix the air-cooling mounting frame (91).

6. The CNC machining center spindle according to claim 1, characterized in that: A front end cover (11) and a motor cover (12) are detachably mounted on both ends of the spindle housing (1), and a rear end cover (13) is detachably mounted on one end of the motor cover (12) away from the spindle housing (1).

7. The CNC machining center spindle according to claim 6, characterized in that: A first rotating bearing (14) is provided on one end of the spindle housing (1) close to the front end cover (11), a second rotating bearing (15) is provided on the motor cover (12), and two ends of the rotating shaft of the spindle motor (2) pass through the first rotating bearing (14) and the second rotating bearing (15) respectively.

Images