CN102039430B - Miniaturized mandrel unit and spindle unit with replaceable tool - Google Patents

Abstract

The invention discloses a miniaturized mandrel unit with a replaceable cutter and a spindle device, wherein the mandrel unit comprises a shaft sleeve, a sliding part sleeved in the shaft sleeve, a collet chuck locked with the sliding part and an elastic part for providing elastic force for the sliding part to pull the collet chuck to sleeve towards the inside of the shaft sleeve, the sliding part is provided with a body and a ring sleeve fixedly arranged on the body, the body is provided with a large-diameter part and a screw hole corresponding to the large-diameter part, and the ring sleeve is fixedly arranged on a small-diameter part. The spindle device includes a spindle unit, a housing unit, a motor, a front bearing, a rear bearing, and a head unit. And the position of the ring sleeve is staggered with the screw hole, so that the mandrel unit is suitable for mandrel units with small size and high rotating speed.

Description

Miniaturized mandrel unit and spindle unit with replaceable tool

technical field

The invention relates to a processing machine, in particular to a miniaturized mandrel unit and a main shaft device with replaceable tools. the

Background technique

As shown in Figures 1 and 2, there is an existing spindle device, which includes a spindle unit 1, a housing unit 2 sleeved outside the spindle unit 1, and a housing unit installed between the spindle unit 1 and the housing. A motor 3 between the units 2, a front air bearing 4 arranged on the front side of the motor 2 and installed between the spindle unit 1 and the housing unit 2, and a front air bearing 4 arranged on the rear side of the motor 3 and installed on the spindle Rear air bearing 5 between unit 1 and the housing unit 2 . The mandrel unit 1 has a shaft sleeve 101, a slide 102 sleeved in the sleeve 101, a collet 103 locked with the slide 102, and a collet 103 for pulling the slide 102 An elastic elastic member 104 is fitted inside the sleeve 101 . the

As shown in FIG. 2 , the slider 102 has a body 105 and a ring 106 which is fixed on the body 105 and has a hollow ring shape. The hole 107 , the collar 106 extends rearwardly from the front end of the body 105 . the

Although the arrangement of the collar 106 provides low frictional resistance when the sliding member 102 moves linearly relative to the shaft sleeve 101, but because the setting position of the collar 106 corresponds to the screw hole 107, so that the sliding member 102 The miniaturization is limited, that is to say, when the size of the sliding member 102 becomes small, there is not enough thick tapping to produce the screw hole 107, and the spindle unit 1 of the high-speed (such as 200000～300000rpm) spindle device must adopt For designs with lower mass and smaller size, in order to maintain an appropriate moment of inertia, or for drilling with small diameters, the mandrel unit 1 must also be designed with a smaller size. The miniaturized sleeve 101 cannot accommodate the above-mentioned sliding member 102 due to the smaller diameter of the inner hole. the

Moreover, in order to fix the collar 106 to the body 105, the body 105 also has an external thread 108 disposed on the outer peripheral surface, and the collar 106 has an internal thread 106' screwed on the external thread 108, As a result, the miniaturization of the slider 102 is more restricted. the

Contents of the invention

It is an object of the present invention to provide a miniaturized spindle unit with replaceable tools which can be reduced in radial size. the

Another object of the present invention is to provide a spindle device having a miniaturized spindle unit with replaceable tools, which can reduce the radial size. the

The miniaturized mandrel unit with replaceable tool of the present invention comprises a shaft sleeve, a sliding part sleeved in the shaft sleeve, a collet locked with the sliding part, and a collet for pulling the sliding part An elastic elastic member is fit inside the shaft sleeve. The sleeve is hollow tubular and extends along an axis. The slider has a body and a ring sleeve fixed on the body. The body is stepped and has a large diameter portion, a The small-diameter portion on the rear side of the large-diameter portion, a shoulder connected between the large-diameter portion and the small-diameter portion, and a screw hole provided corresponding to the axis, the position of the screw hole corresponds to the large-diameter portion, and the ring The sleeve is fixed on the small diameter portion and extends backward from the shoulder. The collet is locked on one side of the slider along the axis, and has a threaded portion threaded in the threaded hole. The elastic member is installed inside the shaft sleeve, and provides the elastic force for the sliding member to draw the collet to fit inside the shaft sleeve, and make the collet generate a clamp toward the axis. the

The present invention has a spindle device with a tool changeable miniaturized spindle unit, comprising a spindle unit, a housing unit, a motor, a front bearing, a rear bearing and a headstock unit. The mandrel unit extends along an axis, and has a sleeve, a sliding piece sleeved in the sleeve along the axis, a collet locked with the sliding piece along the axis, and a sleeve The elastic member between the shaft sleeve and the sliding member, the sliding member has a body and a ring sleeve fixed on the body, the body is stepped, and has a large diameter portion, a joint along the axis The small diameter portion on the rear side of the large diameter portion, a shoulder connected between the large diameter portion and the small diameter portion, and a screw hole corresponding to the axis, the position of the screw hole corresponds to the large diameter portion, the ring The sleeve is fixed on the small diameter portion and extends backward from the shoulder. The collet has a threaded portion screwed in the screw hole. The elastic member provides the slider to pull the collet toward the inner sleeve of the sleeve. Combined elastic force, and make the collet produce a beam clip toward the axis. The housing unit is hollow and cylindrical and sleeved on the outside of the mandrel unit. The motor is installed between the spindle unit and the housing, and drives the spindle unit to rotate. The front bearing is installed between the spindle unit and the casing, and is arranged on the front side of the motor. The rear bearing is installed between the spindle unit and the casing, and is arranged on the rear side of the motor. The headstock unit has a headstock fixed on the casing unit and a pressure cylinder for pushing and pulling the slider. the

The beneficial effect of the present invention lies in that the radial dimension can be reduced by using the collar fixed on the small-diameter portion and extending backward from the shoulder. the

Description of drawings

Fig. 1 is the combination sectional view of existing a kind of spindle device;

Fig. 2 is the partially enlarged schematic diagram of this kind of spindle device;

Fig. 3 is a combined sectional view of a preferred embodiment of the main shaft device of the tool changeable miniaturized mandrel unit of the present invention;

Fig. 4 is the partially enlarged schematic diagram of this preferred embodiment;

Fig. 5 is another partially enlarged schematic view of the preferred embodiment, illustrating that a collar is fixed on a body. the

Detailed ways

The present invention is described in detail below in conjunction with accompanying drawing and embodiment:

As shown in Fig. 3 and Fig. 4, the preferred embodiment of the present invention has the spindle device 100 of the tool changeable miniaturized spindle unit 10, and also includes a shell unit 20 sleeved on the outside of the spindle unit 10, A motor 30 sleeved between the spindle unit 10 and the housing unit 20, a front bearing 40 disposed on the front side of the motor 30, a rear bearing 50 disposed on the rear side of the motor 30, a rear bearing 50 disposed on the A thrust bearing 60 on the rear side of the rear bearing 50 and a headstock unit 70 disposed on the rear side of the thrust bearing 60 . the

The mandrel unit 10 includes a shaft sleeve 11 extending along an axis L, a slider 12 sleeved in the shaft sleeve 11, a collet 13 locked with the slider 12, and a sleeve 12 for providing the slider 12. Pull the collet 13 to fit the elastic elastic member 14 toward the interior of the shaft sleeve 11 . the

The sleeve 11 has an inner ring 112 defining a shaft hole 111 and an outer ring 113 opposite to the inner ring 112. The inner ring 112 has a shaft perpendicular to the axis L and corresponding to the collet 13. The positioning shoulder 114, the outer ring surface 113 has a front end 115, a rear end 116, a middle section 117 between the front end 115 and the rear end 116, and a rear end 116 and The positioning disc 118 extends radially. the

The sliding member 12 is sleeved in the shaft hole 111 , and has a body 121 and a collar 122 fixed on the body 121 . The main body 121 is stepped, and has a large-diameter portion 123, a small-diameter portion 124 connected behind the large-diameter portion 123 along the axis L, and a small-diameter portion 124 connected between the large-diameter portion 123 and the small-diameter portion 124. The shoulder 125 and a screw hole 126 corresponding to the axis L, the position of the screw hole 126 corresponds to the large diameter portion 123 . With reference to Fig. 5, the ring sleeve 122 of this embodiment is a self-lubricating bearing, and has a plurality of ring grooves 1221 recessed on the inner ring surface and filled with glue. The glue in the ring grooves 1221 makes the The ring sleeve 122 is fixed on the small diameter portion 124 and extends backward from the shoulder portion 125, and provides low frictional resistance when the slider 12 moves linearly relative to the sleeve 11. the

The collet 13 is locked to one side of the sliding member 12 along the axis L, and has a threaded portion 131 threaded in the threaded hole 126 . the

The elastic member 14 is installed inside the sleeve 11 and springs against between the positioning shoulder 114 and the large-diameter portion 123 of the body 12 , so that the collet 13 is clamped toward the axis L to form a clamp. the

The casing unit 20 is hollow and cylindrical, and has a casing 21 and a cooling jacket 22 fixed inside the casing 21 . the

The motor 30 is installed between the middle section 117 of the spindle unit 10 and the cooling jacket 22 and drives the spindle unit 10 to rotate. the

The front bearing 40 is an air bearing, installed between the front end 115 of the spindle unit 10 and the cooling jacket 22 , and disposed on the front side of the motor 30 . the

The rear bearing 50 is an air bearing installed between the rear end 116 of the spindle unit 10 and the cooling jacket 22 , and is disposed on the rear side of the motor 30 and the front side of the positioning plate 118 . the

The thrust bearing 60 is an air bearing, installed between the rear end 116 of the spindle unit 10 and the cooling jacket 22 , and is disposed behind the positioning plate 118 relative to the rear bearing 50 . the

The headstock unit 70 has a headstock 71 fixed on the housing unit 10 and located behind the thrust bearing 60 , and a pressure cylinder 72 for pushing the slider 12 . When the sliding member 12 is actuated by the pressure cylinder 72 and drives the collet 13 to move forward, the collet 13 is released for tool change. the

In the present invention, the collar 122 is fixed on the small diameter portion 124 of the body 121 and extends backward from the shoulder 125 . Utilize the setting of this collar 122, not only provide that this slide piece 12 produces low frictional resistance when linearly moving relative to this axle sleeve 11, and because this screw hole 126 corresponds to this large-diameter portion 123, although the outer diameter of slide piece 12 The size becomes smaller, but there is enough thick tapping on the large diameter portion 123, so the overall radial dimension of the slider 12 can be miniaturized, and it is suitable for miniaturized mandrel units 10 and spindle devices for high-speed or fine-hole drilling 100. the

It is worth mentioning that the ring sleeve 122 and the body 121 of the present invention are bonded by glue, which is firmly consolidated. However, the ring sleeve 106 and the body 105 shown in FIG. , may be loose, so the solidity of the ring sleeve 122 and the body 121 of the present invention is also better than that of the existing spindle device. the

Claims (11)

1. but the miniaturization axle unit of a tool changing comprises that an axle sleeve, one are set in collet chuck and a spring element of sliding part in this axle sleeve, one and this sliding part interlocking; This miniaturization axle unit is characterised in that:

This axle sleeve is axis of hollow tubular and edge and extends;

This sliding part; Be set in this axle sleeve; And having a body and a ring set that is installed in this body, this body is step shape, and has minor diameter part, one that a large-diameter portion, one be engaged on this large-diameter portion rear side along this axis and be engaged on shoulder and one screw to should axis being provided with between this large-diameter portion and this minor diameter part; This screw the position is set corresponding to this large-diameter portion, this ring set be installed in this minor diameter part and certainly this shoulder extend backwards;

This collet chuck in this sliding part one side, and has the spiro union portion that a spiral shell is located at this screw along this axis interlocking;

This spring element, it is inner to be installed in this axle sleeve, and provides this sliding part to draw to pull the elastic force of this collet chuck towards the inner fit of this axle sleeve, and makes this collet chuck produce the bundle folder towards this axis.

2. but the miniaturization axle unit of tool changing as claimed in claim 1, it is characterized in that: the ring set of this sliding part is a self-lubricating bearing.

3. but the miniaturization axle unit of tool changing as claimed in claim 2 is characterized in that: the ring set of this sliding part has most and is arranged with the annular groove of inserting viscose in inner ring surface and confession.

4. but the miniaturization axle unit of tool changing as claimed in claim 1; It is characterized in that: this axle sleeve has an inner ring surface that defines an axis hole; This inner ring surface has one perpendicular to this axis and to location shoulder that should collet chuck, this spring element is butted between the large-diameter portion of this location shoulder and this body.

5. but the main shaft device with miniaturization axle unit of tool changing comprises an axle unit, a housing unit, a motor, a fore bearing, a rear bearing and a headstock unit; This main shaft device is characterised in that:

This axle unit; Extend along an axis; And have an axle sleeve, one and be set in the sliding part in this axle sleeve, a collet chuck and a spring element that is set between this axle sleeve and this sliding part along this axis and this sliding part interlocking along this axis; This sliding part has a body and a ring set that is installed in this body; This body is step shape, and has minor diameter part, one that a large-diameter portion, one be engaged on this large-diameter portion rear side along this axis and be engaged on shoulder and one screw to should axis being provided with between this large-diameter portion and this minor diameter part, this screw the position is set corresponding to this large-diameter portion; This ring set be installed in this minor diameter part and certainly this shoulder extend backwards; This collet chuck has the spiro union portion that a spiral shell is located at this screw, and this spring element provides this sliding part to draw to pull the elastic force of this collet chuck towards the inner fit of this axle sleeve, and makes this collet chuck produce the bundle folder towards this axis;

This housing unit is hollow tube-shape and is set in this outside, axle unit;

This motor is installed between this axle unit and this housing unit, and drives this axle unit rotational;

This fore bearing is installed between this axle unit and this housing unit, and is arranged on this motor front side;

This rear bearing is installed between this axle unit and this housing unit, and is arranged on this motor rear side;

This headstock unit has a headstock and a pressure cylinder that pushes away this sliding part of pulling that is fixedly arranged on this housing unit.

6. but the main shaft device with miniaturization axle unit of tool changing as claimed in claim 5, it is characterized in that: the ring set of this axle unit is a self-lubricating bearing.

7. but the main shaft device with miniaturization axle unit of tool changing as claimed in claim 6 is characterized in that: the ring set of this axle unit has most and is arranged with the annular groove of inserting viscose in inner ring surface and confession.

8. but the main shaft device with miniaturization axle unit of tool changing as claimed in claim 5; It is characterized in that: the axle sleeve of this axle unit has an inner ring surface that defines an axis hole; This inner ring surface has one perpendicular to this axis and to location shoulder that should collet chuck, this spring element is butted between the large-diameter portion of this location shoulder and this body.

9. but the main shaft device with miniaturization axle unit of tool changing as claimed in claim 5; It is characterized in that: the axle sleeve of this axle unit also has one and is located at this rear bearing rear side and along the location diskware that radially extends, this main shaft device also includes a thrust bearing of being located at this location diskware rear side.

10. but the main shaft device with miniaturization axle unit of tool changing as claimed in claim 9, it is characterized in that: this fore bearing, this rear bearing and this thrust bearing are all air bearing.

11. but the main shaft device with miniaturization axle unit of tool changing as claimed in claim 10; It is characterized in that: this housing unit has a shell and a coolant jacket that is installed in this enclosure; This motor is installed between this axle unit and this coolant jacket, and this fore bearing is installed between this axle unit and this coolant jacket, and is arranged on this motor front side; This rear bearing is installed between this axle unit and this coolant jacket; And be arranged on this motor rear side, this diskware front side, location, this thrust bearing is installed between this axle unit and this coolant jacket, and is arranged on this location diskware rear side with respect to this rear bearing.

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