CN201906832U - Spindle device - Google Patents

Abstract

A spindle device includes a main body unit and a spindle unit. The main body unit has a spindle casting body, two bearings and a spacer ring. The outer circumference of the spacer ring is concavely provided with a cooling channel arranged in a spiral ring shape. The spindle casting body is provided with an inlet air flow channel and a first outlet air flow channel connected to the cooling channel. The spindle unit has a spindle. The spindle has an axial fixed end for clamping and installing a tool. The axial fixed end is provided with a second outlet air flow channel connected to the first outlet air flow channel. The second outlet air flow channel is then connected to the tool position, thereby achieving the effect of improving heat dissipation efficiency and enhancing structural rigidity.

Description

Spindle device

technical field

The utility model relates to a spindle device, in particular to a spindle device with improved heat dissipation efficiency and increased rigidity.

Background technique

Referring to Fig. 1, a spindle device 10 generally used for a central processing machine mainly includes a spindle casting body 11, several bearings 12 sleeved inside the spindle casting body 11, and a spacer sleeved between the two bearings 12. Ring 13, a main shaft 14 passing through the bearing 12 and the spacer ring 13, a set of clamping claws 15 movably arranged inside the main shaft 14, and a tie rod 16 passing through the main shaft 14 and moving in the axial direction , and a tool 17 installed at the outer end of the main shaft 14, the end of the tool 17 extends into the clamping jaw 15, and the user controls the movement of the pull rod 16 to allow the clamping jaw 15 to be clamped, so that the tool 17 Clamped and fixed on the main shaft 14, when the main shaft 14 is running at high speed, the main shaft 14 can drive the entire tool 17 to rotate.

Although the above-mentioned main shaft device 10 can achieve the effect of clamping the tool 17, when the main shaft 14 is running at high speed, it is easy to generate high heat. The bearing 12 does not have a good heat dissipation mechanism, which often causes the main shaft device 10 to generate high heat after operation. After a period of use, the internal parts are easily damaged and the service life is short. Moreover, the high heat of the main shaft 14 will be quickly transferred to the main shaft casting. The thermal deformation of the main body 11 not only affects the processing accuracy, but also the thermal expansion of the internal bearing 12 parts needs to be considered during the pre-compression assembly. The bearing 12 parts have a large combination gap, thus reducing the axial mechanical rigidity.

Contents of the invention

The purpose of the utility model is to provide a spindle device that can improve cooling efficiency and rigidity.

The utility model provides a main shaft device, which includes a main body unit and a main shaft unit, wherein: the main body unit has a main shaft casting body, two bearings sleeved inside the main shaft casting body, and a bearing sleeved on the two bearings. The spacer ring in the middle, the outer periphery of the spacer ring is recessed with a cooling channel arranged in a spiral ring shape, the cooling channel has an inlet end and an outlet end, and an inlet flow channel for the cooling fluid to enter is opened outside the main shaft casting body , the inlet flow channel is connected with the inlet end of the cooling channel, and the main shaft casting body is provided with a first outlet flow channel connected with the outlet end of the cooling channel; the spindle unit has a The main shaft has an axial fixed end, and the interior of the axial fixed end is hollow to form an accommodating space for clamping a tool, and the outside of the axial fixed end is provided with a second outlet connected to the first outlet The air channel, the second outlet air channel communicates with the containing space.

In the main shaft device described in the utility model, the bearing is an oblique ball bearing capable of high-speed operation.

In the main shaft device described in the utility model, the second air outlet channel is located at the clamping part of the main shaft to the tool.

In the spindle device described in the utility model, the cooling fluid is air.

The beneficial effect of the utility model is that: a ring-shaped cooling channel is provided on the outer periphery of the spacer ring, and the main shaft casting body is provided with an inlet flow channel and an outlet flow channel corresponding to the cooling channel, so that the cooling fluid passes through the cooling channel belt. Dissipate heat, so as to achieve the effect of improving cooling efficiency and improving rigidity.

Description of drawings

Fig. 1 is a sectional view of a general spindle device;

Fig. 2 is a sectional view of a preferred embodiment of the spindle device of the present invention.

Detailed ways

Below in conjunction with accompanying drawing and embodiment the utility model is described in detail.

Referring to Fig. 2, in a preferred embodiment, the main shaft device of the present invention mainly includes a main body unit 20 and a main shaft unit 30, and then, the components and spatial combinations of the above-mentioned units are described in detail in back.

The body unit 20 has a main shaft casting body 21, two bearings 22 sleeved inside the main shaft casting body 21, and a spacer ring 23 sleeved between the two bearings 22. The bearing 22 adopts a bevel that can run at high speed For ball bearings, the outer circumference of the spacer ring 23 is concavely provided with a cooling channel 231 arranged in a spiral ring shape in the middle, and the outer circumference of the spacer ring 23 is provided with two sets of O-rings 232 on both sides, and the cooling channel 231 has a There is an inlet port 2311 and an outlet port 2312. There is an inlet air passage 211 for the cooling fluid to enter outside the main shaft casting body 21. In this embodiment, the cooling fluid refers to air. The air inlet air passage 211 and the cooling channel 231 The inlet end 2311 is connected, and the main shaft casting body 21 is provided with a first outlet air passage 212 connected with the outlet end 2312 of the cooling channel 231 .

The main shaft unit 30 has a main shaft 31 passing through the two bearings 22 and the spacer ring 23 , a set of jaws 32 disposed inside the main shaft 31 , and a pull rod 33 passing through the main shaft 31 to drive the gripping jaws 32 , the main shaft 31 is driven by an external motor (not shown) and can be operated at high speed. There is an axial fixed end 311 under the main shaft 31, and an accommodating space 312 is formed in the hollow inside of the axial fixed end 311. The accommodating space 312 can be For the installation of jaws 32 and pull rods 33, after a tool 100 extends into the jaws 32, the pull rod 33 drives the jaws 32 to shrink, so that the tool 100 can be clamped and fixed on the jaws 32, and the axial fixed end 311 is externally arranged There is a second outlet air passage 313 connected with the first outlet air passage 212, the second outlet air passage 313 is connected to the accommodation space 312, and is located at the clamping position of the spindle 31 to the cutter 100, just enough to hold the cutter 100 The blowing operation is performed to remove iron filings adhering to the tool 100 .

The above is an overview of the shape of the main shaft device components of the present utility model, and then, the effect that the utility model is expected to achieve is stated as follows:

The main shaft device of the utility model is mainly designed to solve the shortcomings of the general main shaft device. The technical means adopted is to utilize a ring-shaped cooling channel 231 recessed on the outer periphery of the spacer ring 23, and the spacer ring 23 and the two bearings 22 Direct contact, when the cooling fluid enters the cooling channel 231 from the air intake channel 211, it can directly take away the heat and accelerate the cooling efficiency of the spacer ring 23, so the bearing 22 of the present invention will not generate high heat and can be effectively used during high-speed operation. Reduce the overall temperature and increase the service life. In addition, due to the good cooling efficiency of the utility model, when the machine is running at high speed, the rotation speed of the main shaft 31 can be increased, which is beneficial to the processing operation, and the utility model does not need to consider the problem of thermal expansion. When the parts of the bearing 22 are preloaded and combined, the combined clearance of the axial bearing 22 becomes smaller, which can effectively improve the rigidity of the axial structure and prolong the service life of the bearing 22.

Claims (4)

1. A main shaft device comprising a body unit and a main shaft unit, the body unit has a main shaft casting body, two bearings sleeved inside the main shaft casting body, and a spacer ring sleeved in the middle of the two bearings, The main shaft unit has a main shaft that passes through the two bearings and the spacer ring. The main shaft has an axial fixed end, and the interior of the axial fixed end is hollow to form an accommodating space for clamping a tool. It is characterized in that: In the body unit, a cooling channel arranged in a spiral ring is recessed on the outer periphery of the spacer ring. The cooling channel has an inlet end and an outlet end. The main shaft casting body is provided with an inlet flow channel for cooling fluid to enter. The air flow channel is connected with the inlet end of the cooling channel, and the main shaft casting body is provided with a first outlet air channel connected with the outlet end of the cooling channel; In the main shaft unit, a second outlet flow channel connected with the first outlet flow channel is provided outside the fixed axial end, and the second outlet flow channel communicates with the accommodation space. 2. The spindle device according to claim 1, wherein the bearing is a bevel ball bearing capable of high-speed operation. 3 . The spindle device according to claim 1 , wherein the second outlet flow channel is located at a position where the spindle clamps the tool. 4 . 4. The spindle device of claim 1, wherein the cooling fluid is air.

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