CN220679447U - Dynamic and static pressure permanent magnet synchronous boring machine spindle - Google Patents

Abstract

The utility model discloses a dynamic-static permanent magnet synchronous boring machine spindle which comprises a left-end dynamic-static spindle mechanism, a middle permanent magnet motor mechanism and an internal loose broach mechanism, wherein the left end of the loose broach mechanism is provided with a threaded connection dynamic boring cutter bar, the outer diameter of the left end of the boring cutter bar is provided with a Morse taper with an included angle of 3-10 degrees with the axis of the spindle, meanwhile, the surface of the outer diameter matched with the lower part of the boring cutter bar is provided with a key groove structure, the middle part of a rotating shaft is provided with a hollow structure, the left end of the rotating shaft is provided with a Morse inner taper hole matched with the boring cutter bar, and the middle part and the right end of the rotating shaft are provided with step hollow structures for installing the loose broach mechanism; the rotating shaft is provided with radial threaded through holes for installing jackscrews at the key slot matched positions of the boring cutter bar. According to the spindle of the dynamic-static pressure permanent magnet synchronous boring machine, through the design of the included angle between the boring cutter bar and the axis of the spindle, the spindle synchronously displaces axially and radially, and the axial movement of the loose broach mechanism of the spindle and the rotation movement of the dynamic-static pressure spindle mechanism are matched, so that the cutter yielding and cutter changing strokes are realized in the rotation process of the boring cutter, the occupied space is small, and the degree of automation is high.

Description

Dynamic and static pressure permanent magnet synchronous boring machine spindle

Technical Field

The utility model belongs to the technical field of numerical control machine tools, and particularly relates to a dynamic and static pressure permanent magnet synchronous boring machine spindle.

Background

At present, when the boring machine is used for machining parts, a common mechanical main shaft is generally adopted, and a common rolling bearing is adopted for the bearings, so that the bearing load is small, the reliability is poor, the maintenance and replacement are more troublesome after the bearing is damaged, the main shaft is driven by a motor through a belt, the transmission chain is more, the occupied space of a machine tool is large, and the degree of automation is low. Meanwhile, when the cutter head is worn and changed, the movement of the machine tool in different directions is carried out through the movement cooperation of the machine tool, and the disassembly and the operation are complex.

Disclosure of Invention

The utility model aims to provide a dynamic and static pressure permanent magnet synchronous boring machine spindle which is provided with a dynamic and static pressure spindle mechanism, a permanent magnet synchronous motor mechanism and a loose broach mechanism, and comprises a boring cutter bar and a Morse taper fit of a rotating shaft, so that the technical problems of low reliability and complex operation of the spindle are solved.

The utility model adopts the technical scheme that: a dynamic-static pressure permanent magnet synchronous boring machine spindle comprises a dynamic-static pressure spindle mechanism at the left end, a permanent magnet motor mechanism at the middle part and an internal loose broach mechanism, wherein the left end of the loose broach mechanism is provided with a threaded connection boring cutter bar, the outer diameter of the left end of the boring cutter bar is provided with an inclined Morse taper, and the included angle between the Morse taper axis of the boring cutter bar and the axis of a rotating shaft is 3-10 degrees.

Further, a key groove structure is arranged on the outer diameter surface of the lower part of the boring cutter rod, which is matched with the rotating shaft.

Further, the middle part of the rotating shaft is of a hollow structure, the left end of the rotating shaft is provided with a Morse inner taper hole, and the middle part and the right end of the rotating shaft are of a step hollow structure; the included angle between the axis of the Morse inner taper hole and the axis of the step hollow structure of the rotating shaft is 3-10 degrees.

Further, radial threaded through holes are formed in the rotating shaft at key groove matched positions of the boring cutter rod, and mounting jackscrews are arranged.

Further, the dynamic and static pressure main shaft mechanism comprises a rotating shaft and a shell, wherein the inner walls of the two ends of the shell are respectively provided with a bearing I and a bearing II, and the rotating shaft is sleeved on the inner walls of the bearing I and the bearing II in a clearance manner; the flange is arranged at the left end of the shell in a sleeved mode; and a mounting end cover is arranged at the right end of the shell.

Further, the shell is provided with an oil inlet path, the oil inlet path comprises an oil inlet hole and an axial oil passage, and high-pressure oil is divided into two paths through the oil inlet hole and the axial oil passage; one path of high-pressure oil enters the oil passage of the bearing I from the radial oil passage to the left along the axial oil passage, and further, one path of high-pressure oil passes through the axial oil passage of the bearing I, the shell oil passage and the flange oil passage to reach the right end surface of the flange, and the other path of high-pressure oil enters the bearing I through the radial oil passage of the bearing I to reach the outer surface of the rotating shaft; and one path of high-pressure oil enters the radial oil passage of the bearing II from the radial oil passage to the right along the axial oil passage to reach the inside of the bearing II.

Further, the shell is provided with an oil return path, and the oil return path comprises an axial oil return path.

Further, the permanent magnet motor mechanism comprises a stator jacket, wherein the stator jacket is of a hollow structure, and a stator part is sleeved on the inner wall of the stator jacket; a rotor component is arranged in the gap of the inner wall of the stator component; an expansion sleeve is arranged between the rotor component and the rotating shaft; the gland is coupled and fixed at the right end of the stator jacket; the left end of the stator jacket is provided with a connecting disc which is fixedly connected with an end cover of the dynamic and static pressure main shaft mechanism.

Further, the loose broach mechanism comprises a pull rod and a gasket), a disc reed, an adjusting pad, a pull rod nut and a pressing piece, wherein the pull rod is arranged in the middle of an inner hole of the rotating shaft, and the gasket, the disc reed and the adjusting pad are sleeved at the right end of the pull rod; the right end of the pull rod nut is provided with a pressing sheet; the outer diameter of the left end of the pull rod is provided with threads which are matched with the inside of the right end of the boring cutter bar.

The utility model has the beneficial effects that: 1. the spindle of the dynamic and static permanent magnet synchronous boring machine and the boring cutter bar are provided with the matched Morse taper fit, the axis of the Morse taper is 3-10 degrees with the axis of the spindle, meanwhile, the surface of the outer diameter matched with the lower part of the boring cutter bar is provided with a key slot structure with guiding function, and the boring cutter bar is matched with the axial movement of the loose broach mechanism of the spindle and the rotation movement of the dynamic and static spindle mechanism, so that cutter yielding and cutter changing strokes are realized in the boring cutter rotation process, and the degree of automation is high; 2. the permanent magnet motor mechanism is arranged on the main shaft, so that the torque is large, the feeding amount of the main shaft is improved, and the cutting capacity of the main shaft is improved; 3. the main shaft is provided with a dynamic and static pressure main shaft mechanism, and the bearing load of the main shaft is increased by suspending the rotating shaft through high-pressure oil.

Drawings

Fig. 1 is a schematic structural diagram of a spindle of a dynamic-static pressure permanent magnet synchronous boring machine.

Fig. 2 is a schematic structural diagram of the spindle boring cutter of the dynamic-static pressure permanent magnet synchronous boring machine matched with the spindle.

Fig. 3 is a schematic structural view of a spindle boring cutter bar of the dynamic-static pressure permanent magnet synchronous boring machine.

Fig. 4 is a schematic diagram of a dynamic and static pressure spindle mechanism of the dynamic and static pressure permanent magnet synchronous boring machine spindle of the utility model.

The figure indicates: 100-boring tool bit, 200-boring tool bar, 210-keyway, 300-spindle, 320-shoulder, 400-flange, 500-housing, 510-oil inlet, 520-axial oil duct, 530-oil return duct, 540-oil outlet, 600-bearing I, 700-bearing II, 800-end cover, 900-connecting disc, 1000-stator sleeve, 1100-stator part, 1200-rotor part, 1300-expansion sleeve, 1400-gland, 1500-tabletting, 1600-pull rod nut, 1700-adjusting pad, 1800-disc reed, 1900 pad, 2000-pull rod, 2100-jackscrew.

Detailed Description

In order to better understand the purpose, structure and function of the utility model, the spindle of the dynamic-static pressure permanent magnet synchronous boring machine is further described in detail below with reference to the accompanying drawings.

In the description of the present utility model, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "top," "bottom," "inner," "outer," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate description of the present utility model and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be construed as limiting the present utility model.

It should be noted in advance that, in the present utility model, terms such as "mounted," "connected," "secured," and the like should be construed broadly unless explicitly stated or limited otherwise. For example, the connection may be fixed connection, integral connection, direct connection or detachable connection, etc. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

As shown in fig. 1-4, the novel dynamic-static pressure permanent magnet synchronous boring machine spindle comprises a dynamic-static pressure spindle mechanism at the left end, a permanent magnet motor mechanism in the middle and an internal loose broach mechanism, wherein the dynamic-static pressure spindle mechanism is driven to rotate through the permanent magnet motor mechanism, the loose broach mechanism in the dynamic-static pressure spindle is axially displaced to drive a boring cutter bar 200 to axially and radially displace, and further the boring cutter 100 is driven to realize the cutter feeding and cutter changing process.

Further, the outer diameter of the left end of the boring cutter bar 200 is provided with an inclined Morse taper, the included angle between the Morse taper axis and the axial direction of the rotating shaft 300 is 3-10 degrees, and the boring cutter bar 200 can perform radial displacement simultaneously when axially displacing; the right end of the boring bar 200 is provided with an internal thread structure.

Further, the outer diameter surface of the lower part of the boring bar 200, which is matched with the rotating shaft 300, is provided with a key groove 210 structure, which plays a role in guiding and limiting.

Further, the dynamic and static pressure main shaft mechanism comprises a rotating shaft 300 and a shell 500, wherein a bearing I600 and a bearing II 700 are respectively arranged on the inner walls of the two ends of the shell 500, and the rotating shaft 300 is sleeved on the inner walls of the bearing I600 and the bearing II 700 in a clearance manner; the flange 400 is arranged at the left end of the shell 500 in a sleeved mode; through oil passages in the shell 500, the bearing I600, the bearing II 700 and the flange 400, pressure oil enters the bearing I600, the bearing II 700 and the flange 400, and oil films are respectively formed between the inner walls of the bearing I600 and the bearing II 700 and the outer diameter of the rotating shaft 300, between the right end face of the flange 400 and the left end face of the shaft shoulder 320 of the rotating shaft 100, and between the left end face of the bearing I600 and the right end face of the shaft shoulder 320 of the rotating shaft 300; a mounting end cap 800 is provided at the right end of the housing 500.

Further, the casing 500 is provided with an oil inlet path, as shown in fig. 4, the oil inlet path includes an oil inlet hole 510 and an axial oil passage 520, and the high-pressure oil is divided into two paths through the oil inlet hole 510 and the axial oil passage 520; one path of high-pressure oil enters the oil passage of the bearing I600 from the radial oil passage to the left along the axial oil passage 520, further, one path of high-pressure oil reaches the left end surface of the shaft shoulder 320 through the axial oil passage of the bearing I600, the oil passage of the shell 500 and the oil passage of the flange 400, and one path of high-pressure oil enters the bearing I600 through the radial oil passage of the bearing I600 and reaches the outer surface of the rotating shaft 300; one path of high-pressure oil enters the radial oil passage of the bearing II 700 from the radial oil passage to the right along the axial oil passage 520 to reach the outer surface of the rotating shaft 300.

Further, as shown in fig. 4, the casing 500 is provided with an oil return path, and the oil return path includes an axial oil return path 530, and the high-pressure oil flows out of the casing 500 along the oil return paths of the bearing i 600 and the lower part of the bearing ii 700 and the oil return path 530 of the casing, and finally flows out of the casing 500 through the oil outlet 540.

Further, the spindle 300 is provided with radial threaded through holes at the positions where the key grooves 210 of the boring cutter bar 200 are matched, a jackscrew 2800 is installed, and the upper end of the jackscrew 2800 enters the key groove 210 of the boring cutter bar 200, so that the functions of guiding and limiting the boring cutter bar 200 axially and preventing the boring cutter bar 200 from rotating circumferentially are achieved.

Further, the middle part of the rotating shaft 300 is provided with a hollow structure, the left end is provided with a Morse taper hole, the middle part and the right end are provided with a step hollow structure, and the included angle between the axis of the Morse taper hole and the axis of the rotating shaft 300 is 3-10 degrees.

Further, the permanent magnet motor mechanism comprises a stator housing 1000, wherein the stator housing 1000 is of a hollow structure, and a stator component 1100 is sleeved on the inner wall of the stator housing 1000; a rotor member 1200 is provided in the inner wall gap of the stator member 1100, and torque is generated by electromagnetic action of the stator member 1100 and the rotor member 1200; an expansion sleeve 1300 is arranged between the rotor component 1200 and the rotating shaft 300, and the rotor component 1200 is fixed through interference fit between the expansion sleeve 1300 and the rotating shaft 300; the gland 1400 is coupled and fixed at the right end of the stator housing 1000; the left end of the stator sleeve 1000 is provided with a connecting disc 900, and the connecting disc 900 is fixedly connected with the end cover 800 of the dynamic and static pressure main shaft mechanism, so as to play a role in connecting the dynamic and static pressure main shaft mechanism and the permanent magnet motor mechanism.

Further, the loose broach mechanism comprises a pull rod 2000, a gasket 1900, a disc spring 1800, an adjusting pad 1700, a pull rod nut 1600 and a pressing sheet 1500, wherein the pull rod 2000 is arranged in the middle of an inner hole of the rotating shaft 300, the gasket 1900, the disc spring 1800 and the adjusting pad 1700 are sleeved at the right end of the pull rod 2000, and the loose broach mechanism is axially fixed through the pull rod nut 1600 at the right end of the adjusting pad 1700; the right end of the pull rod nut 1600 is provided with a pressing sheet 1500 for preventing the pull rod nut 1600 from loosening; the outer diameter of the left end of the pull rod 2000 is provided with threads which are matched with the inner part of the right end of the boring cutter bar 200, and the functions of tensioning and fixing the boring cutter bar 200 are achieved.

The use process or the working state of the utility model: firstly, high-pressure oil is provided by an external oil pump, the high-pressure oil is divided into two paths leftwards and rightwards through an oil inlet 510 and an axial oil duct 520 of a shell 500, one path of high-pressure oil enters an oil duct of a bearing I600 from a radial oil duct leftwards along the axial oil duct 520, and further, one path of high-pressure oil reaches the left end face of a shaft shoulder 320 through the axial oil duct of the bearing I600, the oil duct of the shell 500 and the oil duct of a flange 400, and the other path of high-pressure oil enters the bearing I600 through the radial oil duct of the bearing I600 and reaches the outer surface of a rotating shaft 300; one path of high-pressure oil enters the radial oil passage of the bearing II 700 from the radial oil passage to the right along the axial oil passage 520 to reach the outer surface of the rotating shaft 300; the high-pressure oil forms high-pressure oil films on the two end surfaces of the shaft shoulder 320 of the rotating shaft 300 and the outer diameter surface of the rotating shaft 300 respectively, and plays a role in suspending the rotating shaft 300; the rotating shaft 300 is driven to rotate by the electromagnetic action of the stator component 1100 and the rotor component 1200 in the permanent magnet motor mechanism; the boring cutter bar 200 at the front end is driven to rotate by a loose broach mechanism in the rotating shaft 300, and the boring cutter 100 at the front end is driven to rotate for processing.

Further, when the tool is required to be replaced, the external high-pressure air cylinder pumps the piston rod to push the pull rod 2000 leftwards to axially displace, and simultaneously drives the boring cutter bar 200 to axially displace, and under the action of the included angle of the Morse taper axis of the boring cutter bar and the axis of the rotating shaft 300 of 3-10 degrees, the boring cutter bar 200 radially displaces while axially displacing, the boring cutter 100 at the front end gradually moves away from a workpiece processing part, so that the boring cutter 100 is prevented from contacting with a workpiece, and the boring cutter 100 is replaced by cooperating with a machine tool to drive the movement of a main shaft; further, the external high-pressure air cylinder does not inflate the air piston rod to move rightwards, and drives the boring cutter bar 200 to axially displace and tighten under the action of the elasticity of the disc reed 1800, so that boring of a workpiece is performed.

The high-pressure oil in the bearing I600 and the bearing 700 II flows out of the shell 500 along the oil return channel at the lower parts of the bearing I600 and the bearing II 700 and the oil return channel 530 of the shell, and finally flows out of the shell 500 through the oil outlet 540.

The above embodiments are preferred embodiments of the present utility model, and in addition, the present utility model may be implemented in other ways, and various changes and modifications may be made without departing from the scope and spirit of the above claims, and any simple modification, equivalent changes and modifications made to the above embodiments according to the technical substance of the present utility model fall within the scope of the technical solution of the present utility model.

In order to facilitate understanding of the improvements of the present utility model over the prior art by those of ordinary skill in the art, some of the figures and descriptions of the present utility model have been simplified and some other elements are omitted from this document for clarity, as those of ordinary skill in the art will appreciate that these omitted elements also constitute the context of the present utility model.

Claims (9)

1. The utility model provides a sound pressure permanent magnetism synchronous boring machine main shaft, includes sound pressure main shaft mechanism, the permanent magnet motor mechanism in middle part, inside loose broach mechanism of left end, its characterized in that: the left end of the loose broach mechanism is provided with a threaded connection boring cutter bar (200), the outer diameter of the left end of the boring cutter bar (200) is provided with an inclined Morse taper, and the included angle between the Morse taper axis of the boring cutter bar (200) and the axis of the rotating shaft (300) is 3-10 degrees.

2. The spindle of a hybrid permanent magnet synchronous boring machine according to claim 1, wherein: and a key groove (210) structure is arranged on the outer diameter surface of the lower part of the boring cutter bar (200) matched with the rotating shaft (300).

3. The spindle of a hybrid permanent magnet synchronous boring machine according to claim 1 or 2, wherein: the middle part of the rotating shaft (300) is of a hollow structure, the left end of the rotating shaft is provided with a Morse inner taper hole, and the middle part and the right end of the rotating shaft are of a step hollow structure; the included angle between the axis of the Morse inner taper hole and the axis of the step hollow structure of the rotating shaft (300) is 3-10 degrees.

4. The spindle of a hybrid permanent magnet synchronous boring machine according to claim 2, wherein: the rotating shaft (300) is provided with radial threaded through holes at matching positions of key grooves (210) of the boring cutter bar (200), and is provided with mounting jackscrews (2100).

5. The spindle of a hybrid permanent magnet synchronous boring machine according to claim 1, wherein: the dynamic and static pressure main shaft mechanism comprises a rotating shaft (300) and a shell (500), wherein a bearing I (600) and a bearing II (700) are respectively arranged on the inner walls of the two ends of the shell (500), and the rotating shaft (300) is sleeved on the inner walls of the bearing I (600) and the bearing II (700) in a clearance manner; the flange (400) is sleeved at the left end of the shell (500); a mounting end cap (800) is provided at the right end of the housing (500).

6. The spindle of the hybrid permanent magnet synchronous boring machine according to claim 5, wherein: the shell (500) is provided with an oil inlet path, the oil inlet path comprises an oil inlet hole (510) and an axial oil duct (520), and high-pressure oil is divided into two paths through the oil inlet hole (510) and the axial oil duct (520); one path of high-pressure oil enters the oil passage of the bearing I (600) from the radial oil passage to the left along the axial oil passage (520), and further, one path of high-pressure oil passes through the axial oil passage of the bearing I (600), the oil passage of the shell (500) and the oil passage of the flange (400) to reach the right end surface of the flange (400), and the other path of high-pressure oil enters the bearing I (600) from the radial oil passage of the bearing I (600) to reach the outer surface of the rotating shaft (300); and one path of high-pressure oil enters the radial oil passage of the bearing II (700) from the radial oil passage to the right along the axial oil passage (520) and reaches the inside of the bearing II (700).

7. The spindle of a hybrid permanent magnet synchronous boring machine according to claim 5 or 6, wherein: the shell (500) is provided with an oil return path which comprises an axial oil return path (530).

8. The spindle of a hybrid permanent magnet synchronous boring machine according to claim 1, wherein: the permanent magnet motor mechanism comprises a stator jacket (1000), wherein the stator jacket (1000) is of a hollow structure, and a stator component (1100) is sleeved on the inner wall of the stator jacket (1000); a rotor member (1200) is provided in the inner wall gap of the stator member (1100); an expansion sleeve (1300) is arranged between the rotor component (1200) and the rotating shaft (300); the gland (1400) is arranged and coupled and fixed at the right end of the stator jacket (1000); the left end of the stator housing (1000) is provided with a connecting disc (900), and the connecting disc (900) is fixedly connected with an end cover (800) of the dynamic and static pressure main shaft mechanism.

9. The spindle of a hybrid permanent magnet synchronous boring machine according to claim 1, wherein: the loose broach mechanism comprises a pull rod (2000), a gasket (1900), a disc reed (1800), an adjusting pad (1700), a pull rod nut (1600) and a pressing sheet (1500), wherein the pull rod (2000) is arranged in the middle of an inner hole of a rotating shaft (300), and the gasket (1900), the disc reed (1800) and the adjusting pad (1700) are sleeved at the right end of the pull rod (2000); a pressing sheet (1500) is arranged at the right end of the pull rod nut (1600); the outer diameter of the left end of the pull rod (2000) is provided with threads which are matched with the inside of the right end of the boring cutter bar (200).