TWM567147U - Internally hidden type spindle head - Google Patents

Abstract

The present invention relates to a built-in spindle head, which comprises a hollow casing, a main shaft and a power source, wherein the main shaft is disposed in the hollow casing, and the power source is disposed in the hollow casing and has a certain stator And a rotor coaxially sleeved on the main shaft and maintained at a predetermined interval from the main shaft. The rotor is rotatably disposed in the stator and coaxially sleeved on the main shaft for driving the main shaft to rotate. In this way, the built-in spindle head of the creation hides the power source in the hollow casing, thereby reducing the volume, simplifying the number of components and improving the machining accuracy.

Description

Built-in spindle head

This creation is related to the spindle head of the machine tool, especially a built-in spindle head.

Generally, the spindle head used in the machine tool usually uses an external motor to transmit power to the spindle through the reduction gear set, and the spindle is rotated at a high speed for processing. However, the aforementioned external spindle head has the problems of bulky and excessive components. As the running speed increases, the transmission effect provided by the reduction gear set easily causes vibration and machining instability of the spindle, which in turn affects the spindle. The machining accuracy may even cause structural wear.

The main purpose of this creation is to provide a built-in spindle head that reduces the volume, simplifies the number of components, and improves machining accuracy.

In order to achieve the above main purpose, the built-in spindle head of the present invention comprises a hollow casing, a main shaft and a power source. The main shaft is rotatably disposed in the hollow casing; the power source is disposed in the hollow casing and has a stator and a rotor coaxially sleeved on the main shaft and maintained at a predetermined interval from the main shaft, the rotor The rotatably disposed in the stator and coaxially sleeved on the main shaft for driving the main shaft to rotate. Thereby, the built-in spindle head of the creation hides the power source in the hollow casing, thereby achieving the effects of reducing the volume, simplifying the number of components and improving the machining accuracy.

Preferably, a cooling water jacket is disposed in the hollow casing, and the cooling water jacket is sleeved on the power source to provide a cooling effect to the power source. In addition, the outer peripheral mask of the cooling water jacket has a cooling flow passage extending in a spiral shape along the axial direction of the main shaft, so that the power source can uniformly dissipate heat to increase the service life.

Preferably, the hollow housing has a body, a front cover and a waterproof cover. The front end of the body has an air inlet. The front cover is disposed at the front end of the body, and the inner periphery of the front cover has an inner cover. a ring groove, and the outer periphery of the front cover has an air guiding hole communicating with the air inlet hole, and the front cover further has an air outlet hole extending through the inner and outer circumferences, the waterproof cover is disposed on the front end surface of the front cover and A first air passage connecting the air guiding holes is formed between the front covers. In addition, the main shaft has a working end, and the outer peripheral groove of the working end has an outer ring groove, and the outer ring groove forms a second air passage corresponding to the inner ring groove of the front cover and the inner ring groove of the front cover. The second air passage connects the first air passage and the air outlet of the front cover. Thereby, the high-pressure gas is injected from the air inlet hole, and the high-pressure gas sequentially flows through the air guiding hole, the first air channel and the second air channel, and is discharged from the air outlet hole, thereby effectively removing the liquid remaining inside ( Such as cutting fluid), in order to achieve a waterproof effect.

The detailed construction, features, assembly or use of the built-in spindle head provided by this creation will be described in the detailed description of the subsequent embodiments. However, those of ordinary skill in the art should understand that the detailed description and specific embodiments of the present invention are merely used to illustrate the present invention and are not intended to limit the scope of the patent application.

The Applicant first describes the same or similar elements or structural features thereof in the embodiments and the drawings which will be described below.

Referring first to Figures 1 to 3, the built-in spindle head 10 of the present invention includes a hollow housing 20, a spindle 30, and a power source 40.

The hollow housing 20 has a body 21, a front cover 24, and a waterproof cover 25. As shown in the second and third figures, the inside of the body 21 has a front bearing groove 211, a front groove 211, a front groove 211, and a front mounting groove 212, and a groove 213. The bearing groove 211 is provided with a set of bearings (in the present embodiment, the ball bearing 22 and the roller bearing 23 are matched), and the front end of the body 21 has an air inlet hole 214; the front cover 24 is disposed on the front end surface of the body 21. For closing the bearing groove 211 of the body 21, as shown in FIG. 4, the inner circumference of the front cover 24 has three inner ring grooves 241 arranged at intervals (actually only at least one), and the outer periphery of the front cover 24 The edge has an air guiding hole 242 communicating with the air inlet hole 214. The front cover 24 further has an air outlet 243 extending through the inner and outer circumferences. As shown in FIG. 4, the waterproof cover 25 is disposed on the front cover 24 and has an inner circumference thereof. A first air passage 12 communicating with the air guiding hole 242 is formed between the surface and the outer peripheral surface of the front cover 24.

Further, as shown in FIGS. 2 and 3, the hollow casing 20 further has a bearing housing 26, a rear cover 27 and a dust cover 28. The bearing housing 26 is disposed behind the body 21 to mount the slot 213, and the bearing housing 26 has a rear bearing groove 261. The rear bearing groove 261 is provided with another set of bearings (in the embodiment, the ball bearing 22 and the roller bearing 23). The rear cover 27 is disposed on the rear end surface of the bearing housing 26 for closing the rear bearing groove 261. The dust cover 28 is disposed on the rear end surface of the bearing housing 26 and covers the rear cover 27 for providing a dustproof effect.

The main shaft 30 is disposed through the hollow casing 20. As shown in FIG. 3, the front and rear ends of the main shaft 30 are respectively supported by a set of bearings (in this embodiment, a combination of the ball bearing 22 and the roller bearing 23). The front end of the main shaft 30 protrudes from the waterproof cover 25, and the rear end of the main shaft 30 protrudes out of the dust cover 28, so that the main shaft 30 can rotate relative to the hollow casing 20. In addition, the main shaft 30 further has a shaft hole 31 extending along the axial direction thereof. The shaft hole 31 is provided with an outlet pipe 50 for spraying the cutting fluid. The front end of the outlet pipe 50 is not protruded from the front end of the main shaft 30. The rear end of the water pipe 50 protrudes from the rear end of the main shaft 30 and is located outside the dust cover 28. Further, as shown in Fig. 4, the outer peripheral surface of the front end of the main shaft 30 has three outer circumferential grooves 32 (actually only at least one), and the outer ring 30 of the main shaft 30 corresponds to the front in a one-to-one manner. The inner ring groove 241 of the cover 24 is such that a second air passage 14 is formed between each other, and the two second air passages 14 are connected to each other, and one of the second air passages 14 communicates with the first air passage 12 and the other second air passage 14 Then, it is an air outlet 243 that connects the front cover 24. Thereby, after the high pressure gas is injected from the air inlet hole 214 of the body 21, it will sequentially flow through the air guiding hole 242 of the front cover 24, the first air passage 12 formed between the front cover 24 and the waterproof cover 25, and the main shaft 30 and the front. The second air passage 14 formed between the covers 24 is finally discharged from the air outlet 243 of the front cover 24, so that the liquid (such as cutting fluid) remaining in the first and second air passages 12, 14 can be effectively removed, thereby achieving waterproofing. effect.

The power source 40 is disposed in the front mounting groove 212 of the body 21 of the hollow casing 20, and the power source 40 has a long cylindrical stator 41 and a long cylindrical rotor 42. The stator 41 and the hollow casing The body 21 of the 20 is fixed together, and the rotor 42 is disposed in the stator 41 and sleeved coaxially with the main shaft 30, so that the rotor 42 can be driven by a controller 52 to drive the main shaft 30 to rotate together.

In addition, in order to provide a cooling effect to the power source 40, as shown in FIG. 3, the body 21 of the hollow casing 20 has a liquid inlet 215 and a liquid outlet 216, and a cooling is provided in the hollow casing 20. The water jacket 54 and the cooling water jacket 54 are sleeved on the power source 40, and the outer peripheral surface of the cooling water jacket 54 has a cooling flow passage 542 extending in a spiral shape along the axial direction of the main shaft 30 and communicating with the liquid inlet. 215 and the liquid outlet 216. Thereby, after the cooling fluid enters from the liquid inlet 215, it will flow along the cooling flow passage 542, and finally discharged from the liquid outlet 216, so that the continuous circulation can help the power source 40 to achieve the purpose of heat dissipation.

It can be seen from the above that the built-in spindle head 10 of the present invention hides the power source 40 in the hollow casing 20 on the one hand to reduce the volume, simplify the number of components and improve the processing precision. On the other hand, in order to make the power source 40 can maintain a safe operating temperature. The built-in spindle head 10 of the present invention utilizes a cooling water jacket 54 having a spiral flow path 542 to assist the power source 40 in dissipating heat to extend the life of the power source 40. In addition, the built-in spindle head 10 of the present invention further provides a first and second air passages 12 and 14 for allowing high-pressure gas to pass between the front cover 24 and the main shaft 30 to remain in the first and second air passages 12. The liquid in 14 can be effectively excluded to achieve a waterproof effect.

10‧‧‧ Built-in spindle head
12‧‧‧First airway
14‧‧‧Second airway
20‧‧‧ hollow shell
21‧‧‧ body
211‧‧‧ front bearing groove
212‧‧‧ front mounting slot
213‧‧‧ Rear mounting slot
214‧‧‧Air intake
215‧‧‧ inlet port
216‧‧‧ liquid outlet
22‧‧‧ Ball Bearings
23‧‧‧Roller Bearings
24‧‧‧ front cover
241‧‧‧ Inner ring groove
242‧‧‧ Air vents
243‧‧‧ Vents
25‧‧‧Waterproof cover
26‧‧‧ bearing housing
261‧‧‧ rear bearing groove
27‧‧‧Back cover
28‧‧‧Dust cover
30‧‧‧ Spindle
31‧‧‧ shaft hole
32‧‧‧ outer ring groove
40‧‧‧Power source
41‧‧‧ Stator
42‧‧‧Rotor
50‧‧‧Outlet
52‧‧‧ Controller
54‧‧‧Cooling water jacket
542‧‧‧Cooling runner

The first figure is an external perspective view of the built-in spindle head of the present invention. Figure 2 is an exploded perspective view of the built-in spindle head of the creation. Figure 3 is a cross-sectional view of the built-in spindle head of the creation. Fig. 4 is a partial enlarged view of Fig. 3.

Claims (6)

A built-in spindle head includes: a hollow housing; a spindle rotatably disposed in the hollow housing; and a power source disposed in the hollow housing and having a stator and a rotor The rotor is rotatably disposed in the stator and coaxially sleeved on the main shaft for driving the main shaft to rotate. The built-in spindle head of claim 1 further includes a cooling water jacket disposed in the hollow housing and sleeved on the power source. The built-in spindle head according to claim 2, wherein the hollow housing has a liquid inlet and a liquid outlet, and the cooling water jacket has a cooling flow path along the outer circumference, and the cooling flow path is along the The axial direction of the main shaft extends in a spiral shape and communicates with the liquid inlet and the liquid outlet. The built-in spindle head according to any one of claims 1 to 3, wherein the hollow housing has a body, a front cover and a waterproof cover, the front end of the body has an air inlet, the front cover The inner periphery of the front cover has an inner ring groove, and the outer periphery of the front cover has an air guiding hole communicating with the air inlet hole, and the front cover has a through inner and outer circumference. An air outlet, the waterproof cover is disposed on the front end surface of the front cover and forms a first air passage connecting the air guide hole with the front cover; the front end of the main shaft has an outer ring groove, and the outer ring groove corresponds to the front cover A second air passage is formed between the inner ring groove and the inner ring groove of the front cover, and the second air passage communicates with the first air passage and the air outlet of the front cover. The built-in spindle head of claim 4, wherein the hollow housing further has a dust cover disposed at a rear end of the body, the rear end of the spindle passing through the dust cover. The built-in spindle head according to claim 5, wherein the spindle has a shaft hole, and the shaft hole is provided with an outlet pipe, the front end of the outlet pipe is not protruded from the front end of the main shaft, and the outlet pipe is convex at the rear end. Out of the dust cover.