Spindle box of numerical control milling machine

Abstract

The utility model relates to the technical field of numerical control milling machines, in particular to a numerical control milling machine spindle box. According to the technical scheme, the spindle box comprises an oil inlet pipe, a spindle box body and an oil outlet pipe, a spindle hole is formed in the spindle box body, an oil flowing groove is formed in the inner wall of the spindle hole, annular grooves are symmetrically formed in the positions, close to the upper surface and the lower surface of the spindle box body, of the inner wall of the spindle hole, and the annular grooves are communicated with the oil flowing groove. An oil outlet pipe and an oil inlet pipe are fixedly connected to the positions, close to the upper surface and the lower surface, of one side of the spindle box body correspondingly. According to the utility model, the heat dissipation efficiency of the main shaft can be improved, and the main shaft can be lubricated.

Description

Technical Field

[0001] The utility model relates to the technical field of numerical control milling machines, in particular to a spindle box of a numerical control milling machine. Background Art

[0002] Milling machines mainly refer to machine tools that use milling cutters to process various surfaces of workpieces. Usually, the main motion is the rotation of the milling cutter, and the movement of the workpiece and the milling cutter is the feed motion. It can process planes, grooves, various curved surfaces, gears, etc. CNC milling machines are automatic processing equipment with strong processing functions developed on the basis of general milling machines. The processing technology of the two is basically the same, and the structure is somewhat similar. The spindle component of the CNC milling machine is one of the core functional components of the milling machine. Its main function is to generate a rotary motion to enable the milling cutter and the workpiece to perform cutting processing.

[0003] After searching, it is found that the spindle box of the CNC milling machine in the prior art is typically such as a spindle box for a CNC milling machine disclosed in the publication number CN213033659U, which includes a spindle box body, a spindle hole is installed inside the spindle box body, and a spindle is installed inside the spindle hole, and heat dissipation holes are symmetrically opened at both ends of the surface of the spindle box body, and a shielding sleeve is sleeved on the surface of the spindle box body, and an electric push rod is installed on the outer surface of the shielding sleeve, and the other end of the electric push rod is fixed to the spindle box body through a fixed block. In the utility model, heat dissipation holes are opened at both ends of the outer surface of the spindle box, so that the heat generated by the spindle inside the spindle box when working is conveniently dissipated, and at the same time, a shielding sleeve is sleeved on the outer surface of the spindle box, and an electric push rod is installed at one end of the shielding sleeve. By setting the shielding sleeve, it is convenient to cover the heat dissipation holes, so as to avoid dust in the outside air from entering the inner wall of the spindle box through the heat dissipation holes when the spindle box is not in use, and causing corrosion to the spindle inside the spindle box.

[0004] In the above utility model, the spindle inside the spindle box is naturally cooled by providing heat dissipation holes, but the heat dissipation efficiency is low. Therefore, we propose a spindle box for a CNC milling machine. Utility Model Content

[0005] The purpose of the utility model is to provide a spindle box for a CNC milling machine, which has the advantages of being able to improve the heat dissipation efficiency of the spindle and lubricate the spindle, thereby solving the problem of low heat dissipation efficiency in the utility model described in the background technology that the spindle inside the spindle box is naturally cooled by setting heat dissipation holes.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a spindle box of a CNC milling machine, comprising an oil inlet pipe, a spindle box body and an oil outlet pipe, a spindle hole is arranged inside the spindle box body, an oil flow groove is arranged on the inner wall of the spindle hole, annular grooves are symmetrically arranged on the inner wall of the spindle hole near the upper surface and the lower surface of the spindle box body, and the annular grooves are connected to the oil flow grooves, and an oil outlet pipe and an oil inlet pipe are fixedly connected to one side of the spindle box body near the upper surface and the lower surface respectively.

[0007] Preferably, there are twenty-four oil flow grooves in total, and the twenty-four oil flow grooves are arranged in a circular array at equal intervals on the inner wall of the main shaft hole.

[0008] Preferably, connecting flow channels are symmetrically provided inside the spindle box body near the upper surface and the lower surface, and the oil inlet pipe and the oil outlet pipe are connected through the two connecting flow channels and the two annular grooves respectively.

[0009] Preferably, sealing ring grooves are symmetrically arranged on the inner wall of the spindle hole near the upper surface and the lower surface of the spindle box body, and sealing rings are fixedly installed inside the two sealing ring grooves.

[0010] Preferably, a porous flow equalizing ring is fixedly installed inside the two annular grooves.

[0011] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0012] 1. The utility model achieves the effect of improving the heat dissipation efficiency of the spindle and lubricating the spindle by arranging a spindle box body, a spindle hole, an oil flow groove, an annular groove, an oil inlet pipe and an oil outlet pipe. The heat-conducting lubricating oil in the oil inlet pipe enters the annular groove and flows into the oil flow groove. The heat-conducting lubricating oil flowing in the oil flow groove is in direct contact with the spindle inside the spindle hole and takes away the heat of the spindle, thereby improving the heat dissipation efficiency of the spindle. The heated heat-conducting lubricating oil flows out from the oil outlet pipe and is recycled after being collected and cooled.

[0013] 2. The utility model achieves the effect of preventing the flowing heat-conducting lubricating oil from overflowing by setting a sealing ring groove and a sealing ring. The sealing ring inside the sealing ring groove seals the spindle inside the spindle hole and the inner wall of the spindle hole, preventing the flowing heat-conducting lubricating oil from overflowing from the upper and lower ends of the spindle hole.

[0014] 3. The utility model achieves the effect of evenly distributing the heat-conducting lubricating oil in several oil flow grooves by setting multiple hollow flow-evening rings, which is beneficial to the uniform heat dissipation of the main shaft. The setting of the multi-hole flow-evening ring makes the heat-conducting lubricating oil evenly distributed inside the annular groove, so that the heat-conducting lubricating oil evenly enters several oil flow grooves. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1This is a schematic diagram of the main cross-sectional structure of the utility model;

[0016] Figure 2 This is a cross-sectional structural diagram of the utility model;

[0017] Figure 3 For this utility model Figure 1 Schematic diagram of the enlarged structure of A.

[0018] Figure numerals: 1, oil inlet pipe; 2, spindle box body; 3, oil outlet pipe; 4, connecting flow channel; 5, oil flow groove; 6, spindle hole; 7, sealing ring groove; 8, sealing ring; 9, annular groove; 10, porous flow equalizing ring. DETAILED DESCRIPTION

[0019] The technical solution of the utility model is further described below in conjunction with the accompanying drawings and specific embodiments.

[0020] Embodiment 1

[0021] like Figures 1 to 3 As shown, the spindle box of the CNC milling machine proposed by the utility model comprises an oil inlet pipe 1, a spindle box body 2 and an oil outlet pipe 3. A spindle hole 6 is arranged inside the spindle box body 2 for installing the spindle. The spindle is one of the core functional components of the milling machine. Its main function is to enable the milling cutter and the workpiece to perform cutting processing by generating a rotational motion. An oil flow groove 5 is arranged on the inner wall of the spindle hole 6. There are 24 oil flow grooves 5 in total, and the 24 oil flow grooves 5 are equidistantly arranged on the inner wall of the spindle hole 6 in a circular array. The heat-conducting lubricating oil flowing in the oil flow groove 5 is directly in contact with the outer surface of the spindle. The spindle hole 6 has an inner wall symmetrically provided with annular grooves 9 near the upper and lower surfaces of the spindle box body 2, and the annular grooves 9 are connected with the oil flow groove 5. An oil outlet pipe 3 and an oil inlet pipe 1 are fixedly connected with the spindle box body 2 on one side near the upper and lower surfaces, respectively. The heat-conducting lubricating oil enters the annular groove 9 through the oil inlet pipe 1. The spindle box body 2 has connecting flow channels 4 symmetrically provided inside the spindle box body 2 near the upper and lower surfaces. The oil inlet pipe 1 and the oil outlet pipe 3 are connected with the two annular grooves 9 through two connecting flow channels 4, respectively.

[0022] When the utility model is in use, the heat-conducting lubricating oil in the oil inlet pipe 1 enters the annular groove 9 and flows into the oil flow groove 5. The heat-conducting lubricating oil flowing in the oil flow groove 5 is in direct contact with the main shaft inside the main shaft hole 6 and takes away the heat of the main shaft, thereby improving the heat dissipation efficiency of the main shaft. The heated heat-conducting lubricating oil flows out from the oil outlet pipe 3 and is recycled after being collected and cooled.

[0023] Embodiment 2

[0024] like Figures 1 to 3As shown, the spindle box of the CNC milling machine proposed by the utility model, compared with the first embodiment, this embodiment also includes sealing ring grooves 7 symmetrically arranged on the inner wall of the spindle hole 6 near the upper surface and the lower surface of the spindle box body 2, and sealing rings 8 are fixedly installed inside the two sealing ring grooves 7. The sealing ring 8 inside the sealing ring groove 7 seals the spindle inside the spindle hole 6 and the inner wall of the spindle hole 6 to prevent the flowing heat-conducting lubricating oil from overflowing from the upper and lower ends of the spindle hole 6, and porous flow equalizing rings 10 are fixedly installed inside the two annular grooves 9.

[0025] In this embodiment, the provision of the porous flow-balancing ring 10 allows the heat-conducting lubricating oil to be evenly distributed inside the annular groove 9, so that the heat-conducting lubricating oil evenly enters into the plurality of oil flow grooves 5, which is beneficial to uniform heat dissipation of the spindle.

[0026] The above-mentioned specific embodiments are only several preferred embodiments of the present invention. Based on the technical solution of the present invention and the relevant inspiration of the above-mentioned embodiments, those skilled in the art can make various alternative improvements and combinations to the above-mentioned specific embodiments.

Claims

1. A spindle box for a CNC milling machine, comprising an oil inlet pipe (1), a spindle box body (2) and an oil outlet pipe (3), characterized in that: A spindle hole (6) is provided inside the spindle box body (2), an oil flow groove (5) is provided on the inner wall of the spindle hole (6), annular grooves (9) are symmetrically provided on the inner wall of the spindle hole (6) near the upper surface and the lower surface of the spindle box body (2), and the annular grooves (9) are connected to the oil flow grooves (5), and an oil outlet pipe (3) and an oil inlet pipe (1) are fixedly connected to one side of the spindle box body (2) near the upper surface and the lower surface, respectively.

2. The spindle box of a CNC milling machine according to claim 1, characterized in that: A total of twenty-four oil flow grooves (5) are provided, and the twenty-four oil flow grooves (5) are arranged in a circular array at equal intervals on the inner wall of the main shaft hole (6).

3. The spindle box of a CNC milling machine according to claim 1, characterized in that: The spindle box body (2) is symmetrically provided with communication channels (4) near the upper surface and the lower surface. The oil inlet pipe (1) and the oil outlet pipe (3) are respectively connected through the two communication channels (4) and the two annular grooves (9).

4. The spindle box of a CNC milling machine according to claim 1, characterized in that: Sealing ring grooves (7) are symmetrically arranged on the inner wall of the spindle hole (6) near the upper surface and the lower surface of the spindle box body (2), and sealing rings (8) are fixedly installed inside the two sealing ring grooves (7).

5. The spindle box of a CNC milling machine according to claim 1, characterized in that: A multi-hole flow equalizing ring (10) is fixedly installed inside the two annular grooves (9).

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