CN209139835U - A milling machine spindle - Google Patents

Abstract

The utility model discloses a milling machine spindle, which comprises a spindle core provided with a conical surface; the first bearing and the second bearing are sleeved on the conical surface of the shaft core; a third bearing disposed at a rear side of the first bearing; an adjusting ring arranged at the front side of the second bearing; the shaft sleeve is sleeved on the surfaces of the first bearing, the second bearing and the third bearing; the first labyrinth end cover and the second labyrinth end cover are respectively arranged at the front end and the rear end of the shaft sleeve; a first step surface provided on the shaft core; a first nut disposed on the shaft core; a second nut disposed at a rear side of the third bearing; the first clearance adjusting ring is arranged between the first labyrinth end cover and the first step surface; and the second gap adjusting ring is arranged between the second labyrinth end cover and the first nut. The utility model discloses a set up the axle core into the conical surface to set up the first bearing and the second bearing with the conical surface adaptation of axle core, make the main shaft be convenient for assembly positioning and improve the assembly precision, reinforcing cutting ability.

Description

A milling machine spindle

technical field

The utility model relates to the technical field of machining, in particular to a spindle of a milling machine.

Background technique

CNC milling machine refers to a machine tool that can use the spindle to mill workpieces. Its main components usually include a machine base, a worktable, a spindle, a spindle drive motor, a feed drive motor, and a fixture for fixing the workpiece; during operation, the spindle rotates The movement of the main shaft is the main movement, and the relative movement between the workpiece and the main shaft is the feed movement. A cutter head is installed at the front end of the main shaft. The main shaft of the existing milling machine not only has a complex structure and is inconvenient to assemble, but also has low assembling precision, poor heavy cutting ability and high manufacturing cost.

Therefore, the existing technology still needs to be improved and developed.

Utility model content

In view of the deficiencies of the prior art, the purpose of the present utility model is to provide a milling machine spindle, which aims to solve the problems in the prior art that the milling machine spindle is complex in structure, difficult to assemble, and has poor assembly accuracy, so as to improve the cutting capability of the CNC milling machine.

In order to solve the above-mentioned technical problems, the technical scheme adopted by the utility model is as follows:

The utility model provides a main shaft of a milling machine, which comprises a shaft core provided with a conical surface;

a first bearing and a second bearing sleeved on the tapered surface of the shaft core and adapted to the shaft core;

a third bearing arranged on the rear side of the first bearing and used for increasing the support force for the shaft core;

an adjusting ring provided on the front side of the second bearing and used for positioning the second bearing;

a bushing sleeved on the surfaces of the first bearing, the second bearing and the third bearing;

a first labyrinth end cap and a second labyrinth end cap, respectively arranged at the front and rear ends of the shaft sleeve and used to close the shaft sleeve;

a first step surface provided on the shaft core and located at the front side of the first labyrinth end cap for limiting the position of the first labyrinth end cap;

a first nut disposed on the shaft core and located at the rear side of the second labyrinth end cap for limiting the second labyrinth end cap;

a second nut arranged on the rear side of the third bearing and used for fixing the third bearing;

a first gap adjusting ring arranged between the first labyrinth end cover and the first step surface and used for sealing;

A second gap adjusting ring arranged between the second labyrinth end cover and the first nut and used for sealing.

Further, a synchronous pulley is provided on the shaft core and behind the first nut.

Further, a first positioning key is fitted between the synchronous pulley and the mandrel.

Further, a third nut for fixing the synchronous pulley is provided at the rear side of the synchronous pulley.

Further, a front shell is provided on the shaft core and at the front side of the first labyrinth end cover.

Further, the front end of the shaft core is provided with a second positioning key for positioning the shaft core and the spindle cutter head of the milling machine.

Further, the number of the second positioning keys is at least two.

Further, the inclination angle of the conical surface of the shaft core is 0°~15°

Further, the front shell and the first labyrinth end cover are fixedly connected by first screws.

Further, the second labyrinth end cover and the shaft sleeve are fixedly connected by a second screw.

The utility model has the following beneficial effects: the utility model sets the shaft core as a tapered surface, and sets the first bearing and the second bearing adapted to the tapered surface of the shaft core, so that the main shaft is easy to assemble and position and improve the assembling accuracy , and the structure is simple, the manufacturing cost is low, the assembly speed and accuracy can be improved, and the cutting ability can be enhanced; the front and rear ends of the shaft sleeve are provided with labyrinth end caps, which can play the role of sealing and dustproof, and can also adjust the labyrinth end cap and the gap. The first bearing and the second bearing are respectively sleeved on the front and rear ends of the shaft sleeve, so that the two sides of the shaft sleeve can be evenly stressed and the service life of the equipment can be prolonged; the synchronous belt A first positioning key is arranged between the wheel and the shaft core, which can quickly locate and assemble the synchronous pulley to the shaft core; the front end of the shaft core is provided with a second positioning key for positioning the shaft core and the spindle cutter head, which can quickly The cutter head is installed on the shaft core; in addition, a taper-free hole is adopted at the front end of the spindle, so that the cutting tool does not need to be changed, and the matching accuracy between the cutting tool and the spindle is improved.

Description of drawings

FIG. 1 is a schematic cross-sectional structure diagram of an embodiment of a milling machine spindle of the present invention.

FIG. 2 is a schematic cross-sectional structure diagram of the first bearing in FIG. 1 .

In the figure: 1. Shaft core; 2. First bearing; 3. Second bearing; 4. Third bearing; 5. Adjusting ring; 6. Shaft sleeve; 7. First labyrinth end cover; 8. Second labyrinth end Cover; 9. The first step surface; 10. The first nut; 11. The second nut; 12. The first clearance adjusting ring; 13. The second clearance adjusting ring; 14. The timing pulley; 16, the third nut; 17, the front shell; 18, the second positioning key; 19, the first screw; 191, the first screw hole; 192, the second screw hole; 20, the second screw; 201, the third screw hole ; 202, the fourth screw hole.

Detailed ways

The embodiments of the present application will be described in detail below with reference to the accompanying drawings and examples, so as to fully understand and implement the implementation process of how to apply technical means to solve technical problems and achieve technical effects in the present application.

It should be noted that the embodiments in the present application and the features of the embodiments may be combined with each other in the case of no conflict.

In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "front", "rear", "inside", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention. The utility model and simplified description, rather than indicating or implying that the indicated device or element must have a particular orientation, be constructed and operate in a particular orientation, should not be construed as a limitation of the present invention.

Please refer to FIG. 1. FIG. 1 is a schematic structural diagram of an embodiment of a milling machine spindle of the present invention. The milling machine spindle includes a shaft core 1. The shaft core 1 is provided with a tapered surface (not marked). A first bearing 2 and a second bearing 3 are sleeved on the surface (not marked), and the first bearing 2 and the second bearing 3 are respectively arranged at both ends of the shaft core 1, so as to support the bearing from the shaft. The force of the core 1, and the inner walls of the first bearing 2 and the second bearing 3 are adapted to the conical surface (not marked) of the shaft core 1.

By arranging a tapered surface (not marked) on the shaft core 1, and fitting the first bearing 2 and the second bearing 3 on the tapered surface (not marked), the spindle will not be affected by the milling process during milling. The reaction force of the front-end workpiece causes the shaft core 1 to retreat, thus affecting the accuracy of milling; at the same time, because the tapered surface (not marked) is set on the shaft core 1, it also makes the spindle easy to assemble and position and improve the assembly accuracy, and The structure is simple, the manufacturing cost is low, and the assembly speed and accuracy can be improved.

As shown in FIG. 1 , the inner walls of the first bearing 2 and the second bearing 3 are both tapered with a large front end and a small rear end. Correspondingly, the shaft core 1 is also provided with a tapered shape; the first bearing 2 is taken as an example below. Be explained.

FIG. 2 is a schematic cross-sectional structure diagram of the first bearing 2 in FIG. 1. As shown in FIG. 2, the inner wall of the first bearing 2 has an inclined angle α; of course, the position where the first bearing 2 is installed on the shaft core 1 is also corresponding The inclination angle α of the first bearing 2 is suitable for the installation; the inner wall of the first bearing 2 is set with an inclination angle α, which can facilitate the installation and positioning, and can also avoid the displacement of the first bearing 2 and improve the installation accuracy; the inner wall of the second bearing 3 Similar to the first bearing 2 , the inner wall is provided with an inclination angle, which will not be repeated here.

In the preferred solution, the inclination angle of the inclination angle α is 0°~15°. If the inclination angle is too large, the strength of the shaft core 1 will be affected. The effect on the strength of the shaft core 1 is not large.

The rear side of the first bearing 2 is provided with a third bearing 4, and the third bearing 4 is used to increase the support force for the shaft core 1 to prevent the first bearing 2 from being under-stressed during milling. .

Preferably, the third bearing 4 is a ball bearing, the first bearing 2 and the second bearing 3 are roller bearings; the roller bearing is in line contact, which can bear the large load from the shaft core 1, and the ball bearing is in point contact, either The support force for the shaft core 1 is improved, and the shaft core 1 can have a higher rotational speed.

An adjusting ring 5 is arranged on the front side of the second bearing 3 , and the adjusting ring 5 is sleeved on the shaft core 1 and used to locate the position of the second bearing 3 on the shaft core 1 . The front and rear positions of the second bearing 3 can be defined by rotating the adjusting ring 5 .

A shaft sleeve 6 is sleeved on the surfaces of the first bearing 2 , the second bearing 3 and the third bearing 4 ; the front end of the shaft sleeve 6 is provided with a first labyrinth end cover 7 , and the rear end is provided with a second labyrinth end Cover 8; the first labyrinth end cover 7 and the second labyrinth end cover 8 can position the shaft sleeve 6 on the shaft core 1, and at the same time can also seal the space between the shaft sleeve 6 and the shaft core 1, so that the To the role of sealing and dustproof.

In order to improve the sealing effect of the first labyrinth end cover 7 and the second labyrinth end cover 8, they can be used in conjunction with the clearance adjustment ring, which is the sealing ring; The side is provided with a first step surface 9 for limiting the first labyrinth end cover 7, and a first gap adjustment ring 12 is arranged between the first labyrinth end cover 7 and the first step surface 9; A first nut 10 for limiting the position of the second labyrinth end cap 8 is provided on the core 1 at the rear side of the second labyrinth end cap 8 , and a second labyrinth end cap 8 and the first nut 10 are arranged between the second labyrinth end cap 8 and the first nut 10 . Clearance adjustment ring 13.

A second nut 11 is provided on the rear side of the third bearing 4 , and the second nut 11 is used for positioning the position of the third bearing 4 .

The shaft core 1 is provided with a timing pulley 14 on the rear side of the first nut 10. The timing pulley 14 is fixedly connected with the shaft core 1 and rotates coaxially with the shaft core 1, and drives the timing pulley 14 to rotate through the driving device. In turn, the shaft core 1 is driven to rotate, so as to facilitate the machining of the workpiece.

When the synchronous pulley 14 is installed on the shaft core 1, the position of the synchronous pulley 14 is positioned by the first positioning key 15, and the first positioning key 15 is arranged between the synchronous pulley 14 and the mandrel 1. The shaft core 1 is provided with a key hole (not marked) for installing the first positioning key 15 .

A third nut 16 for fixing the synchronous pulley 14 is provided at the rear side of the synchronous pulley 14 . The timing pulley 14 can be fixed; in addition, during installation, the front side of the timing pulley 14 is pressed against the first nut 10 .

A front shell 17 is provided on the shaft core 1 at the front side of the first labyrinth end cover 7 . The front shell 17 can seal and protect the front end of the shaft core 1 and can also play a role of sealing and dustproof.

The front shell 17 is provided with a first screw hole 191 , the first labyrinth end cover 7 is provided with a second screw hole 192 , and the front shell 17 and the first labyrinth end cover 7 pass through the first screw 19 Fixed connection.

The second labyrinth end cover 8 is provided with a third screw hole 201, the shaft sleeve 6 is provided with a fourth screw hole 202, and the second labyrinth end cover 8 and the shaft sleeve 6 pass through the second screw 20. Fixed connection.

Preferably, the number of the first screws 19 is at least two, and the number of the second screws 20 is at least two.

In order to facilitate the installation of the spindle cutter head of the milling machine on the shaft core 1, the front end of the shaft core 1 is provided with a second positioning key 18 for positioning the shaft core 1 and the cutter head; (Not marked) is fixed at the front end of the shaft core 1. When installing the cutter head, clamp the cutter head on the second positioning key 18 to realize the positioning of the cutter head and the shaft core 1, and then lock the screw to fix the cutter head on the second positioning key 18. on the shaft core 1.

Preferably, the number of the second positioning keys 18 is at least two, and the number of screws fixed on each second positioning key 18 is at least four.

By setting the shaft core as a tapered surface, and setting the first bearing and the second bearing adapted to the tapered surface of the shaft core, the utility model facilitates the assembly and positioning of the main shaft and improves the assembly accuracy, and has a simple structure and low manufacturing cost. , which can improve the assembly speed and accuracy, and enhance the cutting ability; the front and rear ends of the shaft sleeve are provided with labyrinth end caps, which can play a role in sealing and dustproof. The first bearing and the second bearing are respectively sleeved at the front and rear ends of the shaft sleeve, so that the two sides of the shaft sleeve can be evenly stressed and the service life of the equipment can be prolonged; The first positioning key can quickly locate and assemble the synchronous pulley to the shaft core; the front end of the shaft core is provided with a second positioning key for positioning the shaft core and the spindle cutter head, which can quickly install the cutter head on the shaft core ; In addition, the non-tapered hole is used at the front end of the spindle, so that it does not need to change the cutting tool, which improves the matching accuracy between the cutting tool and the spindle.

It should be understood that the application of the present invention is not limited to the above examples. For those of ordinary skill in the art, improvements or transformations can be made according to the above descriptions, and all these improvements and transformations should belong to the protection scope of the appended claims of the present invention.

Claims (1)

1. a milling machine main shaft, is characterized in that, comprises the axle core that is provided with conical surface; a first bearing and a second bearing sleeved on the conical surface of the shaft core and adapted to the shaft core; the first bearing and the second bearing are roller bearings; a third bearing arranged on the rear side of the first bearing and used for increasing the support force for the shaft core; the third bearing is a ball bearing; an adjusting ring provided on the front side of the second bearing and used for positioning the second bearing; a bushing sleeved on the surfaces of the first bearing, the second bearing and the third bearing; a first labyrinth end cap and a second labyrinth end cap, respectively arranged at the front and rear ends of the shaft sleeve and used to close the shaft sleeve; a first step surface provided on the shaft core and located at the front side of the first labyrinth end cap for limiting the position of the first labyrinth end cap; a first nut disposed on the shaft core and located at the rear side of the second labyrinth end cap for limiting the second labyrinth end cap; a second nut arranged on the rear side of the third bearing and used for fixing the third bearing; a first gap adjusting ring arranged between the first labyrinth end cover and the first step surface and used for sealing; a second gap adjusting ring arranged between the second labyrinth end cover and the first nut and used for sealing; A synchronous pulley is arranged on the shaft core and behind the first nut; A first positioning key is fitted between the synchronous pulley and the mandrel; The shaft core is provided with a key hole for installing the first positioning key; The rear side of the synchronous pulley is provided with a third nut for fixing the synchronous pulley; A front shell is provided on the shaft core and at the front side of the first labyrinth end cover; The front end of the shaft core is provided with a second positioning key for positioning the shaft core and the spindle cutter head of the milling machine; the number of the second positioning keys is at least 2; The inclination angle of the conical surface of the shaft core is 0°~15°; The front shell is provided with a first screw hole, the first labyrinth end cover is provided with a second screw hole, and the front shell and the first labyrinth end cover are fixedly connected by a first screw; The second labyrinth end cover is provided with a third screw hole, the shaft sleeve is provided with a fourth screw hole, and the second labyrinth end cover and the shaft sleeve are fixedly connected by a second screw.