CN211540508U - Direct-connected main shaft center water outlet cooling structure - Google Patents

Abstract

A direct-connected spindle center water cooling structure includes a spindle box, the spindle box is formed with a cavity penetrating both ends, the cavity is provided with a direct-connected spindle that is rotatably matched with the spindle box, and a motor is also fixed at one end of the spindle box. The head end of the direct-coupled spindle is coaxially connected to the rotating shaft, and the end of the direct-coupled spindle passes through the headstock and is provided with a cutter head fixture coaxially connected with it. Tool; the direct-connected spindle is formed with an axially through spindle flow channel, the machining tool is formed with an axially through tool flow channel, the motor shaft is formed with an axially arranged rotating shaft flow channel, the rotating shaft flow channel, the main shaft flow channel The channel and the tool channel are connected in turn to form a water-cooled channel, and the outer wall of the motor has a water inlet communicated with the head end of the rotary shaft channel. The high-pressure coolant is injected through the water inlet, and finally realizes the cooling structure of the axial center water outlet, which takes away the heat generated during the working process from the inside of the motor, the direct-connected spindle and the machining tool.

Description

A direct-connected main shaft center outlet water cooling structure

technical field

The utility model relates to the technical field of mechanical cutting, in particular to a direct-connected spindle center water outlet cooling structure.

Background technique

During the mechanical cutting process of milling, boring and grinding, a large amount of heat will inevitably be generated. If the heat cannot be dissipated in time, the tool and the spindle will be thermally elongated, that is, the tool will be heated at different temperatures. The lengths are different. The parts in the above mechanical cutting work are fixed. Since the length of the tool is different under different temperature conditions, the machined parts cannot be consistent with the drawings.

To avoid the above problems, many improvements have been made in the prior art.

For example, the Chinese utility model with the application number of 201821029482.3 "a workpiece electric spindle for CNC tool grinding machine" adopts the water-cooling method of adding anti-rust liquid. It can prevent the spindle from being overheated, prevent the thermal expansion or shrinkage of the spindle, ensure the accuracy requirements during the spindle operation, and obtain high-quality machining accuracy.

For example, the Chinese utility model with the application number of 201320595454.9 "Water-cooling structure for the center of the mechanical spindle", the tool-loading mechanism is formed with a water outlet that communicates with the main cooling channel and is used to make the fluid cooling medium flow out in the direction of the tool. The fluid cooling medium cools the tool, thereby reducing the temperature of the tool, prolonging the service life of the tool, and improving the machining efficiency and quality of the tool.

The applicant has found through research that the above-mentioned prior art and its improved technical solutions cannot efficiently cool the tool, and the heat dissipation effect is always unsatisfactory.

Utility model content

In order to make up for the deficiencies of the above-mentioned prior art, the utility model provides a direct-connected main shaft center water outlet structure, and the specific technical scheme is as follows.

A direct-connected spindle center water cooling structure includes a spindle box, the spindle box is formed with a cavity penetrating both ends, the cavity is provided with a direct-connected spindle that rotates and cooperates with the spindle box, and one end of the spindle box is also fixed with a motor. The head end of the direct-coupled spindle is coaxially connected to the rotating shaft, and the end of the direct-coupled spindle passes through the headstock and is provided with a cutter head fixture coaxially connected with it. Tool; the direct-connected spindle is formed with an axially through spindle flow channel, the machining tool is formed with an axially through tool flow channel, the motor's rotating shaft is formed with an axially arranged rotating shaft flow channel, the rotating shaft flow channel, the main shaft flow channel The channel and the tool channel are connected in turn to form a water-cooled channel, and the outer wall of the motor has a water inlet communicated with the head end of the rotor channel.

Compared with the prior art, the beneficial effects of the present utility model are:

The shaft flow channel, the spindle flow channel and the tool flow channel are connected in turn to form a water-cooled flow channel. Converged and discharged, the cooling structure of axial center water outlet is finally realized, the heat generated during the working process is taken away from the interior of the motor, the direct-connected spindle and the processing tool, and the accumulated chips at the processing place are washed and cleaned by the discharged coolant.

The present utility model will be further described below with reference to the accompanying drawings and specific embodiments.

Description of drawings

Figure 1 is a schematic structural diagram of the present invention.

FIG. 2 is a schematic view of the cross-sectional structure taken along the line A-A of FIG. 1 .

Detailed ways

As shown in Figures 1 and 2, a direct-connected main shaft center water cooling structure includes a main shaft box 1. The main shaft box 1 is formed with a cavity penetrating both ends, and the cavity is equipped with a direct-connected main shaft that rotates and cooperates with the main shaft box 1. 2. A motor 3 is also fixed at one end of the spindle box 1. The motor 3 has a rotating shaft 4 coaxially connected with the head end of the directly coupled spindle 2, and the end of the directly coupled spindle 2 passes through the spindle box 1 and is coaxially connected with it. The cutter head holder 5, the cutter head holder 5 is equipped with a machining tool 6 that is coaxially matched with the direct-connected main shaft 2; The rotary shaft 41 of the motor 3 is formed with an axially arranged rotary shaft runner 41. The rotary shaft runner 41, the main shaft runner 21 and the tool runner 61 are connected in turn to form a water-cooled runner, and the outer wall of the motor 3 is There is a water inlet 42 communicated with the head end of the shaft flow channel 41 .

In the direct-connected spindle center water outlet cooling structure provided in the above embodiment, the rotating shaft flow channel 41 , the main shaft flow channel 21 and the tool flow channel 61 are connected in sequence to form a water cooling flow channel, and the high-pressure coolant is injected through the water inlet 42 . The shaft runner 41 passes through the main shaft runner 21 and the tool runner 61, and finally converges and discharges at the tool tip of the machining tool 6, and finally realizes the cooling structure of the axial center water outlet. The inside of the tool 6 takes away the heat generated in the working process, and at the same time, the accumulated chips at the machining place are washed and cleaned by the discharged coolant.

As an improvement of the above technical solution, the end of the main shaft flow channel 21 is formed with a tool installation groove 22 , and the head end of the machining tool 6 is tightly fitted in the tool installation groove 22 . Preferably, the tool mounting groove 22 is tapered. Correspondingly, the head end of the machining tool 6 is set in a frustum shape that matches the tool mounting groove 22 . The taper surface fitting structure is adopted to provide the connection and fitting of the main shaft runner 21 and the tool runner 61 with more water tightness.

As a further improvement of the above technical solution, the head end of the main shaft flow channel 21 has a built-in rotary joint 7, one end of the rotary joint 7 is tightly fitted in the main shaft flow channel 21 through the first sealing ring 8, and the other end of the rotary joint 7 is tightly fitted into the main shaft flow channel 21. The second sealing ring 9 is tightly fitted in the rotating shaft flow channel 41 , and the rotating connector 7 has a water passage hole 71 passing through in the axial direction. Through the first sealing ring 8 and the second sealing ring 9, the rotating shaft flow channel 41 and the main shaft flow channel 21 have better water tightness.

For those skilled in the art, various other corresponding changes and deformations can be obtained according to the structures and principles disclosed in the present invention, and all these changes and deformations belong to the protection category of the present invention.

Claims (4)

1. A direct-connected spindle center water cooling structure, including a spindle box, the spindle box is formed with a cavity penetrating both ends, the cavity is equipped with a direct-connected spindle that rotates and cooperates with the spindle box, and one end of the spindle box is also fixed with a motor. There is a rotating shaft coaxially connected with the head end of the direct-coupled main shaft, and the end of the direct-coupled main shaft passes through the headstock and is provided with a cutter head clamp coaxially connected with it. The processing tool is characterized in that: the direct-connected spindle is formed with an axially penetrating main shaft runner, the processing tool is formed with an axially penetrating tool runner, the rotating shaft of the motor is formed with an axially arranged shaft runner, and the rotating shaft is formed with an axially arranged shaft runner. The flow channel, the main shaft flow channel and the tool flow channel are connected in sequence to form a water-cooled flow channel, and the outer wall of the motor has a water inlet connected with the head end of the rotating shaft flow channel. 2 . The direct-connected spindle center water cooling structure according to claim 1 , wherein the end of the spindle flow channel is formed with a tool installation groove, and the head end of the machining tool is tightly fitted in the tool installation groove. 3 . 3 . The direct-connected spindle center water cooling structure according to claim 2 , wherein the tool installation groove is tapered, and correspondingly, the head end of the machining tool is set in a frustum shape that matches the tool installation groove. 4 . 4. A direct-connected main shaft center outlet cooling structure according to claim 1, 2 or 3, characterized in that: the head end of the main shaft flow channel has a built-in rotary connector, and one end of the rotary connector passes through the first sealing ring It is tightly fitted in the main shaft flow channel, the other end of the rotary connection is tightly fitted in the rotary shaft flow channel through the second sealing ring, and the rotary connection head has a water-passing hole passing through in the axial direction.

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