CN2205282Y

CN2205282Y - Electric shaft device

Info

Publication number: CN2205282Y
Application number: CN 94239389
Authority: CN
Inventors: 谭茀娃; 金如麟; 董隆予
Original assignee: Shanghai Chuangxin Rare Earth Motor Factory
Current assignee: Shanghai Chuangxin Rare Earth Motor Factory
Priority date: 1994-09-23
Filing date: 1994-09-23
Publication date: 1995-08-16
Anticipated expiration: 2004-09-23

Abstract

The utility model relates to an electric main shaft device used for fine processing in contour machining machinery, which is mainly characterized in that the peripheral surface of a rotary main shaft is inlaid with a permanent magnet, and the periphery of the main shaft with the permanent magnet is provided with a coil stator composed of a hollow cup-shaped coil and a casing; one end of the permanent magnet is provided with a transducer for measuring the turned position of the main shaft. The utility model having the advantages of simple structure, small volume, light weight and large power can obtain stepless speed regulation. The electric main shaft device is convenient to maintain, and is particularly used as an engraving main shaft for engraving machines, and can also be matched on the process equipment of milling machines, drill machines, etc., or the medical equipment of dental drills, bone drills, etc.

Description

Electric shaft device

The utility model relates to the shaping processing equipment, particularly a kind of engraving shaped device that is used for retrofit.

In industries such as advertisement, decoration, industrial art, printing and textile printing and dyeings, be extensive use of engraving machinery in its making sheet technology, in order to carry out chiseling pattern, literal.In traditional engraving machinery in order to install the engraving cutter main shaft device, mainly constituted by shell, mechanical main shaft, cutter chuck and motor and transmission mechanism thereof, wherein, main shaft by bearing spider in shell, cutter chuck is arranged on an end of main shaft, and the other end of main shaft is fixed with drive.So the main shaft device of structure is packed on the slip base of engraving machinery with its shell, and motor also is packed on the slip base, and drags the main shaft rotation by driving belt.Required according to manuscript, literary composition, in cutter chuck, adorn different cutters after, starter motor can be handled main shaft and drive cutter and do rotation at a high speed and cut engraving.The shortcoming of this main shaft device is that the power source that drives the main shaft rotation is peripheral hardware motor and one group of additional transmission mechanism, its complex structure, volume is big, and noise is big, and, the rotating speed of main shaft also can only be done step speed regulation, can not adapt to changeable artistic carving, be in addition, because of motor links by driving belt and main shaft, this relatively-stationary mode of connection, the rotating speed of main shaft is carried not high, also influences the range of main shaft, thereby also quality is carved in influence.For overcoming this a series of weak points, now also have to adopt and have the intermediate frequency asynchronous motor of control device or the brush dc motor is arranged, being arranged in the same shell after motor and the mechanical main shaft binding, directly drive the main shaft device of main axis rotation by motor, can overcome some shortcomings that external motor exists like this, also can improve simultaneously the rotating speed of main shaft device and realize stepless speed regulation, but the former needs special intermediate frequency power supply, and, for overcoming the heating phenomenon of parts in the shell, must increase cooling system, make complex structure, cost improves, latter's difficulty that commutates, difficult in maintenance, the life-span is short, also has the radio interference phenomenon.

The purpose of this utility model is for a kind of electronic main shaft device of electromechanical integration is provided, and with simplified structure, reduced volume reduces noise, handled easily, and realization stepless speed regulation from low speed to high speed.

Realize the utility model of above-mentioned purpose, include shell, main shaft, cutter chuck and electric apparatus control apparatus that existing electronic main shaft device is had, main shaft by bearing spider at the shell center.The design's characteristics are that main shaft is a hollow shaft, have been installed with a cylindrical permanent magnet on the outer peripheral face of this hollow spindle vertically, and this hollow shaft that is installed with cylindrical permanent magnet is suspended in the hollow cup-shaped stator that is fixedly arranged on the shell inner peripheral surface; Hollow cup-shaped stator constitutes by many groups coil with the tubular stator case that many annular ferromagnets are formed by stacking, and coil is glued on the internal perisporium of stator case.The design also is provided with a sensor in order to monitoring main shaft turned position at an end of cylindrical permanent magnet, and this sensor is conveyed into a kind of known controller to the turn signal of main shaft.Controller plays a part AC power is converted to dc source on the one hand, supplies direct current to stator coil, on the other hand in order to main shaft is carried out speed governing.The sensor that is used for the utility model can be in mistor, magnetodiode, magnetic sensitive transistor, resonance transformer or the Hall plate any.

See by last structure,, then general mechanical main shaft is changed over the main shaft of rotor formula because of being provided with permanent magnet on the main shaft; Be inlaid with the hollow cup-shaped loop construction of motor stator formula on the shell internal perisporium, then main shaft device becomes direct electronic type brushless electric main shaft device by coil drive, and it is simple in structure, volume is little, and is in light weight, and it is big to exert oneself, working service is convenient, can realize stepless speed regulation.The main shaft device of this structure is as long as be fixed on it on the slip base of engraving machine simply and after loading onto cutter, can carry out sculpting operation easily.The potentiometer of operation control can be realized the stepless speed regulation to main shaft.Because of the utlity model has characteristics such as miniaturization, high speed and stepless speed regulation, can fit on the process equipments such as milling machine, drilling machine, also may be used on having the field of using widely on the Medical Devices such as dental drill, bone drill.

Embodiment of the present utility model as shown in drawings.

Fig. 1 is a longitudinal sectional view of the present utility model.

Fig. 2 is the profile front view of electric-connected socket of the present utility model.

Below in conjunction with the accompanying drawing illustrated embodiment the utility model is described specifically.

See also accompanying drawing.See that by accompanying drawing the shell 1 of the electronic main shaft device of present embodiment is a cylindrical shape, is installed with the coil stator that is made of stator case 2 and coil 3 on the inwall of cylindrical housing 1.In the present embodiment, many superimposed gummeds of annular ferromagnet of stator case 1 usefulness form a cylindrical shape; Stator coil 3 has four groups, and every group stacks and compose cylindrical shape to intersect after the long annular coiling, this cylindrical circular built-up coil 3 is glued in the cylindrical stator shell 1 again, constitutes hollow cup-shaped coil stator.It is solid with the insulator top that this coil stator is embedded on the inwall of shell the back.See by figure again, the main shaft 4 of main shaft device is a hollow shaft, and at shell 1 center, the edge cover is fixed with a cylindrical permanent magnet 5 on the outer peripheral face of this main shaft 4 with two high-speed bearing 11 bearings in front and back, constitute permanent magnet hollow shaft rotor, promptly the permanent magnet hollow shaft is suspended at the center of hollow cup-shaped coil stator.In the present embodiment, permanent magnet 5 is a ndfeb magnet.As seen, be provided with the Hall plate 13 as sensor above the left end of cylindrical permanent magnet 5 among the figure, Hall plate is electrically connected with controller, and 9 is electric-connected socket among the figure.Right-hand member is the part of cutter chuck among the figure, and wherein, being screwed on 6 on the shell is adjusting nut, and 7 is locking nut, and 8 for going out to consider to be worth doing device, is locked on the main shaft 4 after the engraving cutter is set in the hollow spindle, and turn adjusting nut 8 can be finely tuned the depth of cut.

For making main shaft under various cutters of device and different cutting force, have enough high speed rotational stabilizations, present embodiment is provided with the bearing pretightening device in bearing 11 both sides of hollow spindle 4 one ends, promptly the circle place is lined with ripple packing ring 12 outside bearing 11 inboards, the circle place is lined with and adjusts packing ring 10 within bearing 11 outsides, the decrement that packing ring 10 can change ripple packing ring 12 is adjusted in transposing, to change the tight degree of giving of bearing.

Claims

1, a kind of electronic main shaft device that includes shell, main shaft, cutter chuck and electric apparatus control apparatus, main shaft, is characterized in that at the shell center by bearing spider:

A, main shaft (4) is a hollow shaft, has been installed with a cylindrical permanent magnet (5) on the outer peripheral face of this hollow spindle (4) vertically; This hollow spindle (4) that is installed with cylindrical permanent magnet (5) is suspended in the hollow cup-shaped stator that is fixedly arranged on shell (1) inner peripheral surface; Hollow cup-shaped stator constitutes by many groups coil (3) with the tubular stator case (2) that many annular ferromagnets are formed by stacking, and coil (3) is glued on the internal perisporium of stator case (2);

B, an end of cylindrical permanent magnet (5) also are provided with a sensor (13) in order to monitoring main shaft turned position.

2, according to the described electronic main shaft device of claim 1, bearing (11) both sides that it is characterized in that being positioned at hollow spindle (4) axle one end are provided with the bearing pretightening device, and this pretightening device is to fill up in the ripple packing ring (12) on the circle outside the bearing inboard and fill up the adjustment packing ring (10) that encloses within the bearing outside.