CN206717552U - Longhole inner circle electric mill main shaft - Google Patents
Longhole inner circle electric mill main shaft Download PDFInfo
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- CN206717552U CN206717552U CN201720421944.5U CN201720421944U CN206717552U CN 206717552 U CN206717552 U CN 206717552U CN 201720421944 U CN201720421944 U CN 201720421944U CN 206717552 U CN206717552 U CN 206717552U
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- main shaft
- housing
- bearing
- inner circle
- electric mill
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Abstract
The utility model discloses a kind of longhole inner circle electric mill main shaft, including main shaft and the body being socketed on outside main shaft, body includes the first housing and the second housing, the first housing is fixedly connected with the second housing, first housing radius is less than the radius of the second housing, body is stretched in outside front-end of spindle, for installing emery wheel, the first housing, which stretches into, drives wheel grinding inner walls of deep holes and end face inside deep hole.First housing draw ratio is big in the utility model, can extend into inside deep hole, drives the emery wheel of front-end of spindle installation, circular-hole internal-wall and end face is ground, main axis stiffness is strong, is not susceptible to offset, so that it is guaranteed that machining accuracy and processing stability in grinding process.
Description
Technical field
It the utility model is related to mechanical grinding technology, more particularly to a kind of longhole inner circle electric mill main shaft.
Background technology
Existing longhole inner circle grinding is more to be realized by the elongated mill bar of inner circle electric mill spindle mounted.But existing processing
Following defect be present in mode：Because elongated mill bar diameter is small, rigidity and intensity is not high, easily causes mold deflection, causes to process
Aperture becomes big, influences crudy, and elongated mill bar service life, rotating speed are low.
Utility model content
For overcome the deficiencies in the prior art, the purpose of this utility model is to provide a kind of longhole inner circle electric mill main shaft,
It is high with big L/D ratio, front-end of spindle intensity.
The purpose of this utility model is realized using following technical scheme：
A kind of longhole inner circle electric mill main shaft, including main shaft and the body that is socketed on outside main shaft, the body include the first machine
Body and the second housing, the first housing are fixedly connected with the second housing, and the first housing radius is less than described second
The radius of body, the front-end of spindle stretch in the body outside, and for installing emery wheel, the first housing stretches into band inside deep hole
Move the wheel grinding inner walls of deep holes and end face.
Further, the longhole inner circle electric mill main shaft also includes bearing group and the motor being fixedly installed in body, institute
Stating bearing group includes clutch shaft bearing component, second bearing component and 3rd bearing component, and the clutch shaft bearing component is fixedly mounted
In the first housing front end, the second bearing component, the 3rd bearing component are fixedly installed in described with the motor
In the second housing, the main shaft be plugged in the clutch shaft bearing component, the second bearing component, the 3rd bearing component with
In the motor.
Further, the clutch shaft bearing component is to match the Bearing configuration group formed, institute by four angular contact ball bearings
It is the Bearing configuration group formed by two angular contact ball bearing pairings to state second bearing component, and the 3rd bearing component is one deep
Ditch ball bearing.
Further, the clutch shaft bearing component center is provided with spacer, and the spacer divides four angular contact ball bearings
Two groups are divided into, every group includes two angular contact ball bearings, and described clutch shaft bearing component one end is provided with the first locking nut, to
Realize that the both ends of the clutch shaft bearing component are fixedly mounted.
Further, each bearing outer ring both ends of the second bearing component, which are floated, is set.
Further, the longhole inner circle electric mill main shaft also includes dust cap and top cover, and the dust cap is fixedly installed in
The front-end of spindle is simultaneously fixedly connected with the first housing, and the top cover is fixedly installed in the rear-end of spindle and with described
Two bodies are fixedly connected.
Further, described 3rd bearing component one end is floated, and elastic component, institute are provided between the other end and the top cover
It is wavy spring to state elastic component.
Further, the longhole inner circle electric mill main shaft also includes sealing mechanism and sealing gland gland, and the sealing gland gland is consolidated
Dingan County is loaded between the dust cap and the clutch shaft bearing component, and the sealing mechanism includes sealing gland entrance, sealing gland air flue, the
One air flue and the second air flue, for the sealing gland entrance on the top cover, the sealing gland gland is provided with sealing gland air flue, and described first
Body is provided with first air flue, and the second housing is provided with second air flue, and gas enters from the sealing gland entrance
Afterwards, enter the internal body through second air flue, first air flue, the sealing gland air flue and form sealing air pressure.
Further, the longhole inner circle electric mill main shaft also includes cooling body, and the cooling body cools down including stator
Set, the second coolant jacket, cooling duct and cooling entrance, the motor stator outside socket stator coolant jacket, described second
Bearing outer is socketed second coolant jacket, and the second housing is provided with the cooling duct, and the top cover is provided with described
Entrance is cooled down, cooling medium is after the cooling entrance enters, through the cooling duct, second coolant jacket and the stator
Coolant jacket is discharged.
Compared with prior art, the beneficial effects of the utility model are：First housing draw ratio is big, can extend into deep hole
Portion, the emery wheel of front-end of spindle installation being driven, circular-hole internal-wall and end face are ground, main axis stiffness is strong, is not susceptible to offset, from
And ensure machining accuracy and processing stability in grinding process.
Brief description of the drawings
Fig. 1 is a sectional view of the longhole inner circle electric mill main shaft of the utility model one；
Fig. 2 is enlarged drawing of longhole inner circle electric mill main shaft shown in Fig. 1 at A.
In figure：100th, longhole inner circle electric mill main shaft；10th, body；11st, the first housing；12nd, the second housing；20th, bearing group
Part；21st, clutch shaft bearing group；22nd, second bearing group；23rd, 3rd bearing group；24th, the first locking nut；25th, spacer；26th, second
Locking nut；27th, elastic component；30th, motor；31st, stator；32nd, axle core component；40th, main shaft；50th, sealing mechanism；51st, sealing gland enters
Mouthful；52nd, sealing gland gland；53rd, sealing gland air flue；54th, the first air flue；55th, the second air flue；60th, cooling body；61st, stator coolant jacket；
62nd, the second coolant jacket；63rd, cooling duct；64th, entrance is cooled down；70th, dust cap；80th, top cover.
Embodiment
Below, with reference to accompanying drawing and embodiment, the utility model is described further：
As shown in Figure 1-2, a kind of longhole inner circle electric mill main shaft 100 includes body 10, the bearing group being fixed in body 10
Part 20 and motor 30, wear the main shaft 40 being connected in bearing assembly 20 and motor 30, sealing mechanism 50, cooling body 60 and thermometric system
System.
Body 10 includes the first housing 11 and the second housing 12, and the wherein radius of the first housing 11 is less than the second housing 12
Radius.The first housing 11 is fixedly connected with the second housing 12, and body 10 is socketed on main shaft 40.One end of the first housing 11 is provided with
Dust cap 70, prevents impurity from entering the inside of longhole inner circle electric mill main shaft 100, and the other end is fixedly connected with the second housing 12.
Motor 30 and main shaft 40 are installed with inside the second housing 12, one end of the second housing 12 is provided with top cover 80, to seal depth
The one end of hole inner circle electric mill main shaft 100.
Bearing assembly 20 includes clutch shaft bearing group 21, second bearing group 22 and 3rd bearing group 23, wherein, clutch shaft bearing group
21 form QBC pairings by the back-to-back series connection of four bearings, and second bearing group 22 is matched by the back-to-back DB that forms of two bearings, and
Clutch shaft bearing group 21 and second bearing group 22 are angular contact ball bearing, and 3rd bearing group 23 is made up of a deep groove ball bearing.
Clutch shaft bearing group 21 is fixedly installed in the first housing 11, in the one end of clutch shaft bearing group 21 and the inwall of the first housing 11
Abut, the other end is locked by the first locking nut 24.First locking nut 24 ensures the front end tool of longhole inner circle electric mill main shaft 100
There is enough rigidity.The center of clutch shaft bearing group 21 is provided with spacer 25, four bearings is separated into combination of two, to adjust first
The axial gap of bearing group 21 simultaneously carries out precompressed to clutch shaft bearing group 21.Second bearing group 22 is fixedly installed in body 10, position
In the junction of the first housing 11 and the second housing 12, second locking nut 26 is installed in the one end of second bearing group 22, to
Apply pretightning force to second bearing.Two bearing outer ring both ends in second bearing group 22 are floated, and can reduce the thermal expansion of main shaft 40
Influence to the performance of longhole inner circle electric mill main shaft 100.3rd bearing group 23 is socketed on the rear end of main shaft 40, and outer ring one end is floated
It is dynamic, such as wavy spring of elastic component 27 is installed between the other end and top cover 80 and carries out pretension, to reduce the thermal expansion of main shaft 40 to master
The influence of axle performance, it is ensured that the axial stability that main shaft 40 operates.
The configuration mode of above bearing assembly 20 ensures axially have when longhole inner circle electric mill main shaft 100 rotates at a high speed with radial direction
Enough rigidity, while make it that the temperature rise value of longhole inner circle electric mill main shaft 100 is small, so as to permanent moment of torsion in different environments
Grinding is carried out, ensures high accuracy processing, is vibrated in addition, the configuration mode of bearing assembly 20 helps to reduce, extends deep hole
The life-span of inner circle electric mill main shaft 100.
Motor 30 is fixedly mounted in the second housing 12, and between second bearing group 22 and 3rd bearing group 23.Electricity
Machine 30 includes stator 31 and axle core component 32, and axle core component 32 is enclosed on main shaft 40, and stator 31 is socketed on the outside of axle core component 32.
Main shaft 40 is connected in bearing and motor 30.The front end of main shaft 40 is in tapered, for installing grinding wheel stand, on grinding wheel stand
Emery wheel is installed, realizes the internal grinding processing of deep hole and the grinding of deep hole end face, such can of clamping workpiece is same
When complete deep hole inner headed face and end face grinding, preferably ensure machining accuracy.
Sealing mechanism 50 includes sealing gland entrance 51 and air flue, and air flue includes sealing gland air flue 53, the first air flue 54, the second air flue
55 with labyrinth gap.Top cover 80 is provided with sealing gland entrance 51；Sealing gland gland is installed between dust cap 70 and clutch shaft bearing group 21
52, sealing gland gland 52 is provided with annular groove and is radially provided with hole along sealing gland gland 52, and hole connects to form sealing gland air flue with annular groove
53；The first housing 11 is provided with the first air flue 54, and the second housing 12 is provided with the second air flue 55.One end of first air flue 54 and second
Air flue 55 connects, and the other end connects with sealing gland air flue 53.Between clutch shaft bearing group 21, spindle assemblies, dust cap 70 and main shaft 40
Fit-up gap be present, form labyrinth gap.Air enters inside longhole inner circle electric mill main shaft 100 from sealing gland entrance 51, along second
Air flue 55, the first air flue 54, sealing gland air flue 53 form sealing air pressure even into labyrinth gap.On the one hand, the air energy of flowing
Heat caused by band bearing running high speed rotary grinding, on the other hand, the air of flowing can also effectively prevent sewage, grindstone dust etc. miscellaneous
Matter enters inside longhole inner circle electric mill main shaft 100.
Cooling body 60 includes stator coolant jacket 61, the second coolant jacket 62, cooling duct 63 and cooling entrance 64, stator 31
Stator coolant jacket 61 is installed between the second housing 12, the second coolant jacket 62 is installed between second bearing group 22 and body,
The second housing 12 is provided with cooling duct 63, and cooling entrance 64 and the cooling medium such as coolant outlet, water, oil are provided with top cover 80
Enter from cooling entrance 64 inside longhole inner circle electric mill main shaft 100, through cooling duct 63, the second coolant jacket 62, stator coolant jacket
Discharged after 61 from coolant outlet, form cooling body 60.The cooling body 60 is located at the big installation position of motor 30 of caloric value
At second bearing group 22, comprehensive cooling can be carried out to motor 30 and second bearing group 22, effectively suppress the temperature rise of main shaft 40
Value, reduce the thermal deformation of main shaft 40 and thermal expansion, it is ensured that stability that main shaft 40 works long hours, reliability, improve converted products
Dimensional accuracy and surface roughness.In addition, the cooling body 60 first cools down second bearing group 22, and it is rear to cool down stator 31, contribute to
Second bearing group 22 is preferably cooled down, extends the service life of main shaft 40.
Longhole inner circle electric mill main shaft 100 also includes temp measuring system, and temp measuring system includes being installed on longhole inner circle electric mill main shaft
Stator temperature sensor and bearing temperature sensor inside 100 body 10, timely and effectively to feed back, monitor longhole inner circle
The working condition of electric mill main shaft 100, ensure production safety.
In use, being first passed through gas, cooling medium, cooling body 60 and sealing mechanism 50, then, motor stator 31 are opened
The rotation of three-phase alternating current variable-frequency power sources drive shaft perseverance torque high speed is connected, the front end of main shaft 40 is deep into deep hole, makes to be arranged on master
The various emery wheels of the front end of axle 40 carry out high efficiency, high-precision grinding, and can be required to select different works according to specific works
Make rotating speed.
100 front ends of the utility model medium-length hole inner circle electric mill main shaft are elongated, and draw ratio is big, can go deep into the deep hole of workpiece.
The power that longhole inner circle electric mill main shaft 100 is born when processing is acted predominantly on the first housing 11, the diameter phase of the first housing 11
It is bigger than in traditional mill bar, meanwhile, the front end of longhole inner circle electric mill main shaft 100 also has four angular contact ball bearings to configure to be formed first
Bearing group 21 is supported, it is possible to ensures to possess enough rigidity during new longhole inner circle electric mill 100 workpieces processing of main shaft,
It is favorably improved machining accuracy and processing efficiency.In addition, the rear end of longhole inner circle electric mill main shaft 100 is relatively large in diameter, can accommodate
High-power, high pulling torque motor 30, high rotating speed and the high pulling torque output of main shaft are ensure that, so as to avoid conventional master spindle driving elongated
The Low rigidity that is faced during mill bar, low precision, it is inefficient the problems such as.
It will be apparent to those skilled in the art that technical scheme that can be as described above and design, make other various
Corresponding change and deformation, and all these changes and deformation should all belong to the protection of the utility model claims
Within the scope of.
Claims (9)
1. a kind of longhole inner circle electric mill main shaft, including main shaft and the body that is socketed on outside main shaft, it is characterised in that：The body bag
The first housing and the second housing are included, the first housing is fixedly connected with the second housing, and the first housing radius is less than
The radius of the second housing, the front-end of spindle stretch in the body outside, and for installing emery wheel, the first housing stretches into depth
The wheel grinding inner walls of deep holes and end face are driven inside hole.
2. longhole inner circle electric mill main shaft according to claim 1, it is characterised in that：The longhole inner circle electric mill main shaft also includes
Bearing group and the motor being fixedly installed in body, the bearing group include clutch shaft bearing component, second bearing component and the 3rd
Bearing assembly, the clutch shaft bearing component are fixedly installed in the first housing front end, the second bearing component, the described 3rd
Bearing assembly is fixedly installed in the second housing with the motor, and the main shaft is plugged in the clutch shaft bearing component, institute
State in second bearing component, the 3rd bearing component and the motor.
3. longhole inner circle electric mill main shaft according to claim 2, it is characterised in that：The clutch shaft bearing component is by four angles
The Bearing configuration group that contact ball bearing pairing forms, the second bearing component are formed by two angular contact ball bearing pairings
Bearing configuration group, the 3rd bearing component are a deep groove ball bearing.
4. longhole inner circle electric mill main shaft according to claim 3, it is characterised in that：The clutch shaft bearing component center is provided with
Four angular contact ball bearings are separated into two groups by spacer, the spacer, and every group includes two angular contact ball bearings, the first axle
Bearing assembly one end is provided with the first locking nut, to realize that the both ends of the clutch shaft bearing component are fixedly mounted.
5. longhole inner circle electric mill main shaft according to claim 3, it is characterised in that：Each bearing of the second bearing component
Outer ring both ends, which are floated, to be set.
6. longhole inner circle electric mill main shaft according to claim 2, it is characterised in that：The longhole inner circle electric mill main shaft also includes
Dust cap and top cover, the dust cap are fixedly installed in the front-end of spindle and are fixedly connected with the first housing, the top
Lid is fixedly installed in the rear-end of spindle and is fixedly connected with the second housing.
7. longhole inner circle electric mill main shaft according to claim 6, it is characterised in that：Described 3rd bearing component one end is floated,
Elastic component is installed, the elastic component is wavy spring between the other end and the top cover.
8. longhole inner circle electric mill main shaft according to claim 6, it is characterised in that：The longhole inner circle electric mill main shaft also includes
Sealing mechanism and sealing gland gland, the sealing gland gland are fixedly installed between the dust cap and the clutch shaft bearing component, institute
Stating sealing mechanism includes sealing gland entrance, sealing gland air flue, the first air flue and the second air flue, and the sealing gland entrance is located at the top cover
On, the sealing gland gland is provided with sealing gland air flue, and the first housing is provided with first air flue, and the second housing is provided with
Second air flue, gas is after sealing gland entrance entrance, through second air flue, first air flue, the sealing gland gas
Road enters the internal body and forms sealing air pressure.
9. longhole inner circle electric mill main shaft according to claim 6, it is characterised in that：The longhole inner circle electric mill main shaft also includes
Cooling body, the cooling body, which includes stator coolant jacket, the second coolant jacket, cooling duct and cooling entrance, the motor, to be determined
The sub outside socket stator coolant jacket, the second bearing outside are socketed second coolant jacket, set on the second housing
There is the cooling duct, the top cover is provided with the cooling entrance, and cooling medium is after the cooling entrance enters, through described
Cooling duct, second coolant jacket and the stator coolant jacket are discharged.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720421944.5U CN206717552U (en) | 2017-04-20 | 2017-04-20 | Longhole inner circle electric mill main shaft |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720421944.5U CN206717552U (en) | 2017-04-20 | 2017-04-20 | Longhole inner circle electric mill main shaft |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206717552U true CN206717552U (en) | 2017-12-08 |
Family
ID=60505023
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720421944.5U Active CN206717552U (en) | 2017-04-20 | 2017-04-20 | Longhole inner circle electric mill main shaft |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206717552U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021244024A1 (en) * | 2020-06-03 | 2021-12-09 | 广州市昊志机电股份有限公司 | Spindle structure |
-
2017
- 2017-04-20 CN CN201720421944.5U patent/CN206717552U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021244024A1 (en) * | 2020-06-03 | 2021-12-09 | 广州市昊志机电股份有限公司 | Spindle structure |
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