A main shaft cooling mechanism of a numerical control boring and milling machine

Abstract

The utility model discloses a numerical control boring and milling machine main shaft cooling mechanism relates to numerical control machine tool technical field, it includes the outer tube of inner chamber having rotor, the rotor can drive the output shaft rotation for connecting tool, the rotor outside is provided with the heat dissipation cylinder that is formed by the splicing of a plurality of annular radiating fins, and the heat dissipation cylinder both ends are abutted by front baffle ring, rear baffle ring and are fixed in the inner chamber of outer tube, and the cooling pipe for allowing the cooling liquid flow is penetrated through a plurality of radiating fins to carry out the cooling to it. Compared with prior art, the design can realize the cooling of main shaft in real time with the help of radiating fin and cooling pipe, avoids the damage caused by excessively high temperature in the use process.

Description

Technical Field

[0001] This utility model relates to a cooling mechanism, and more particularly to a spindle cooling mechanism for a CNC boring and milling machine, belonging to the field of CNC machine tool technology. Background Technology

[0002] Spindles operate at continuously high temperatures, necessitating appropriate measures to reduce their temperature and prevent structural damage. A search revealed a patent with publication number "CN221455213U" that discloses a cooling mechanism for electric spindles, primarily designed to prevent corrosion caused by direct contact between cooling media such as water and oil and the spindle outer cylinder. Similarly, the applicant has designed a cooling mechanism for a CNC boring and milling machine spindle and has filed the following application. Utility Model Content

[0003] To address the shortcomings of the existing technology, this utility model provides a spindle cooling mechanism for a CNC boring and milling machine.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is: a CNC boring and milling machine spindle cooling mechanism, including an outer cylinder with a rotor in the inner cavity, the rotor being able to drive an output shaft for connecting tools to rotate; a heat dissipation cylinder formed by assembling several annular heat dissipation fins is provided on the outer side of the rotor, the two ends of the heat dissipation cylinder being abutted by a front retaining ring and a rear retaining ring to be fixed in the inner cavity of the outer cylinder, and a cooling pipe for allowing coolant to flow through several of the heat dissipation fins to cool them.

[0005] Preferably, the outer cylinder is provided with a front end cover and a rear end cover at both ends. The rear end cover is fixedly connected to the front end cover by the threaded sections of several fasteners. The fasteners can pass through the rear retaining ring, the heat dissipation cylinder and the front retaining ring in sequence so that the three are confined within the inner cavity of the outer cylinder.

[0006] Preferably, the fastener also has a smooth through section and a stop section, and when the through section passes through the rear retaining ring, the heat sink cylinder and the front retaining ring, the stop section can abut against the rear retaining ring.

[0007] Preferably, a washer ring through which a fastener passes is also sandwiched between the front retaining ring and the front end cover.

[0008] Preferably, the front and rear retaining rings have pipe grooves formed on themselves, and the cooling pipes that pass through the heat sink are fitted into the pipe grooves.

[0009] Preferably, the cooling pipe includes several U-shaped flexible pipes, and the flexible pipes are connected by short pipes to form a single loop.

[0010] Preferably, the annular heat sinks are fixed together by columns to form a heat sink cylinder.

[0011] This utility model has at least the following advantages:

[0012] 1. The spindle can be cooled in real time with the help of heat sinks and cooling pipes to avoid damage caused by excessive temperature during use;

[0013] 2. The heat dissipation cylinder is securely fixed inside the outer cylinder by the front and rear retaining rings;

[0014] 3. The cooling pipe is a single loop composed of several U-shaped flexible pipes, which can improve the utilization rate of coolant. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model.

[0016] Figure 2 yes Figure 1 An internal diagram.

[0017] Figure 3 This is a cross-sectional schematic diagram of the present invention.

[0018] Figure 4 yes Figure 3 Enlarged diagram of point A in the middle.

[0019] Figure 5 This is a schematic diagram of the heat sink structure.

[0020] Figure 6 This is a structural diagram of a fastener.

[0021] In the diagram, 1-outer cylinder; 101-rotor; 102-output shaft; 2-front end cover; 3-rear end cover; 4-heat sink; 401-heat sink fin; 402-column; 5-cooling pipe; 501-flexible pipe; 502-short pipe; 6-fastener; 601-threaded section; 602-through section; 603-stop section; 7-front retaining ring; 8-rear retaining ring; 9-washer ring. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] like Figures 1-6As shown: A spindle cooling mechanism for a CNC boring and milling machine includes an outer cylinder 1 with a front end cover 2 and a rear end cover 3 at both ends. A heat dissipation cylinder 4 is installed in the inner cavity formed by the outer cylinder 1. A cooling pipe 5 that allows coolant to flow through the heat dissipation cylinder 4 is inserted through the heat dissipation cylinder 4. When the rotor 101 of the outer cylinder 1 drives the output shaft 102 for connecting the tool to rotate through its own rotating shaft, the heat dissipated by it will be absorbed by the heat dissipation cylinder 4. During the heating process of the heat dissipation cylinder 4, the cooling pipe 5 can continuously cool it through the coolant to achieve the cooling function.

[0024] Furthermore, such as Figure 2 , Figure 5 As shown, the heat sink 4 is composed of several annular heat sinks 401. Each heat sink 401 is welded together on the column 402 to form a whole, and there is a certain gap between them as a heat dissipation channel. The cooling pipe 5 penetrates the entire heat sink 4 through the pre-set holes of the heat sink 401 to achieve the cooling effect of the heat sink 4.

[0025] Furthermore, such as Figure 4 , Figure 6 As shown, the rear end cover 3 is provided with several fasteners 6 that are similar to bolts. The fasteners 6 have a three-section structure design, consisting of a threaded section 601 with threads, a smooth through section 602, and a stop section 603 from front to back. The threaded section 601 of the fastener 6 is used to allow the front end cover 2 and the rear end cover 3 to be combined with each other and abut against the two sides of the outer cylinder 1, so that the outer cylinder 1 forms the aforementioned inner cavity. The through section 602 is used to pass through the aforementioned heat dissipation cylinder 4, so that the heat dissipation cylinder 4 can be located in the inner cavity of the outer cylinder 1.

[0026] Specifically, since the heat sink 4 needs to be limited to prevent slippage when it passes through the through section 602 of the fastener 6, a front retaining ring 7 and a rear retaining ring 8 of a certain thickness are also inserted on both sides of the heat sink 4 through the through section 602. The rear retaining ring 8 can abut against the stop section 603 of the fastener 6, and the front retaining ring 7 abuts against the front end cover 2 through a washer ring 9. If this is done, the heat sink 4 will be unable to move because both ends are pressed against the front retaining ring 7 and the rear retaining ring 8. At this time, the whole structure will form a whole.

[0027] Specifically, the aforementioned front retaining ring 7, rear retaining ring 8, and gasket 9 also form pipe grooves, which are used to hold the cooling pipe 5 that passes through the heat sink 4 in the pipe grooves to avoid being squeezed by the outer cylinder 1.

[0028] Specifically, the cooling pipe 5 includes several U-shaped flexible pipes 501 that pass through the heat sink 4. Different flexible pipes 501 are connected by short pipes 502 to form a single loop, so that the coolant can circulate again in the heat sink 4 and improve its utilization rate.

[0029] The operating principle of this design is roughly the same as that of existing technologies. Simply put, during the use of the spindle, the heat sink can absorb the heat generated by it. At this time, coolant is introduced into the cooling pipe, which can carry away some of the heat to avoid the spindle overheating and causing structural damage.

[0030] It is understood that this utility model has been described through some embodiments, and those skilled in the art will recognize that various changes or equivalent substitutions can be made to these features and embodiments without departing from the spirit and scope of this utility model. Furthermore, under the teachings of this utility model, these features and embodiments can be modified to adapt to specific situations and materials without departing from the spirit and scope of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the protection scope of this utility model.

Claims

1. A spindle cooling mechanism for a CNC boring and milling machine, comprising an outer cylinder (1) with a rotor (101) in its inner cavity, the rotor (101) being capable of driving an output shaft (102) for connecting a cutting tool to rotate, characterized in that: The rotor (101) is provided with a heat dissipation cylinder (4) formed by splicing several annular heat dissipation fins (401) on the outside. The heat dissipation cylinder (4) is fixed in the inner cavity of the outer cylinder (1) by the front retaining ring (7) and the rear retaining ring (8) at both ends. The cooling pipe (5) for allowing the coolant to flow passes through several of the heat dissipation fins (401) to cool them down.

2. The CNC boring and milling machine spindle cooling mechanism as described in claim 1, characterized in that: The outer cylinder (1) is provided with a front cover (2) and a rear cover (3) at both ends. The rear cover (3) is fixedly connected to the front cover (2) through the threaded section (601) of a number of fasteners (6). The fasteners (6) can pass through the rear retaining ring (8), the heat sink (4) and the front retaining ring (7) in sequence so that the three are confined in the inner cavity of the outer cylinder (1).

3. The spindle cooling mechanism of a CNC boring and milling machine as described in claim 2, characterized in that: The fastener (6) also has a smooth through section (602) and a stop section (603). When the rear retaining ring (8), the heat sink (4) and the front retaining ring (7) are passed through by the through section (602), the stop section (603) can abut against the rear retaining ring (8).

4. The spindle cooling mechanism of a CNC boring and milling machine as described in claim 2, characterized in that: A washer ring (9) through which a fastener (6) passes is also sandwiched between the front retaining ring (7) and the front end cover (2).

5. The spindle cooling mechanism of a CNC boring and milling machine as described in claim 1, characterized in that: The front retaining ring (7) and the rear retaining ring (8) have pipe grooves formed on themselves, and the cooling pipe (5) that passes through the heat sink (4) is stuck in the pipe groove.

6. The spindle cooling mechanism of a CNC boring and milling machine as described in claim 1, characterized in that: The cooling pipe (5) includes several U-shaped flexible pipes (501), and each flexible pipe (501) is connected to form a single loop through short pipes (502).

7. A CNC boring and milling machine spindle cooling mechanism as described in any one of claims 1-6, characterized in that: The annular heat sinks (401) are fixed together by pillars (402) to form a heat sink cylinder (4).

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