CN207701581U - Transmission shaft - Google Patents
Transmission shaft Download PDFInfo
- Publication number
- CN207701581U CN207701581U CN201721149836.3U CN201721149836U CN207701581U CN 207701581 U CN207701581 U CN 207701581U CN 201721149836 U CN201721149836 U CN 201721149836U CN 207701581 U CN207701581 U CN 207701581U
- Authority
- CN
- China
- Prior art keywords
- transmission shaft
- bearing
- axle sleeve
- fluid
- high pressure
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- Sliding-Contact Bearings (AREA)
Abstract
The utility model proposes transmission shaft, transmission shaft have air-bearing structure or oil float bearing arrangement.By taking air-bearing structure as an example, the air-bearing is made of air suspension shaft sleeve, bearing outer ring and sealing cover, have the characteristics that precise structure, volume size be regardless of, passing power precisely, power transmission be lost it is minimum, the high pressure gas flowed out from radial through-hole, one layer of air film is formed between transmission shaft and axle sleeve, so that transmission shaft does not rub in rotation with axle sleeve, low wear rate sturdy and durable to such bearing is enabled.Due to improvement of the utility model transmission shaft on bearing arrangement, when the fluid in bearing is gas, the rotating speed of transmission shaft is up to 10000r/min or more.
Description
Technical field
The utility model is related to arrive machine components processing technique field, a kind of transmission shaft is especially related to.
Background technology
Air-bearing is one of common form of gas bearing, and air-bearing is since running speed is high, rotating accuracy is high, profit
The advantages that sliding environmental clean, gradually it is widely used in precision machining industry, low temperature compression industry, food industry, health care
The fields such as industry, nuclear industry, aerospace.But must have a special compressed gas source when air-bearing operation, once air source goes out
Existing failure is stopped the supple of gas or steam, and air-bearing will be damaged thoroughly.When air-bearing starts, it is necessary to compressed gas source is first opened, when pressure reaches
Can just it start when certain value.When air-bearing is stopped, air source must time-delay closing.The requirement of this harshness makes in spy
Different occasion is greatly limited using air-bearing.
High-speed bearing application is very extensive, such as fax moving axis industry.But high-speed bearing is more demanding to use environment,
It such as lubricates, cool down.Greatest drawback is to be unable to long-term work, restricted lifetime.
There are four types of types, i.e. rolling bearing, sliding bearing, oscillating bearing and oil-containing for the existing common bearing of motor transmission shaft
Bearing.However the bearing of existing motor transmission shaft is easy to wear, and rotating speed is not high.
Utility model content
The main purpose of the utility model is to provide a kind of transmission shaft, and the bearing for solving contemporary transmissions axis is easy to wear, and
The not high problem of rotating speed.
The utility model proposes a kind of transmission shafts, including bearing, transmission shaft, locating plate, rotor set；
The rotor set is installed in the middle part of the transmission shaft, and is fixed by two locating plates；
The transmission shaft is installed in two bearings, is gap-matched between transmission shaft and bearing；
The bearing includes axle sleeve, bearing outer ring, sealing cover, and the axle sleeve is nested in the bearing outer ring, and is passed through
Sealing cover is fixed and closed so that high pressure cavity is formed between the axle sleeve and the bearing outer ring；
The bearing outer ring is provided with fluid inlet, is connected to the high pressure cavity；
The axle sleeve is uniformly arranged in hollow cylindrical, including one or more fluid channel, the side plane of the axle sleeve
There are multiple axially extending bores, the axially extending bore to be respectively communicated with the high pressure cavity and the fluid channel；
The outer circle side of axle sleeve is provided with multiple radial through-hole, and is yet formed between the axle sleeve and the bearing outer ring
Two cavitys, second cavity make each fluid channel be connected to by the radial through-hole；
Axle sleeve inner circle side is evenly arranged with multiple radially outlets, is connected to the fluid channel, and the radial direction goes out
The diameter of mouth is less than the diameter of the fluid channel.
Preferably, fluid is contained in the high pressure cavity, the fluid is gas or liquid.
Preferably, the liquid is hydraulic oil, and the hydraulic oil is flowed into from the fluid inlet, into high pressure sky
Then chamber flows into the fluid channel from the axially extending bore, flowed out through the radially outlet.
Preferably, there is a seal box on the outside of the bearing, for recycling the hydraulic oil flowed out from the radially outlet.
Preferably, the fluid is gas, and the gap between the transmission shaft and axle sleeve is 0.5-100 μm.
Preferably, the fluid is liquid, and the gap between the transmission shaft and axle sleeve is 10-200 μm.
Preferably, the fluid inlet is provided with one-way cock, and fluid is made uniaxially to flow into high pressure cavity from fluid inlet.
Preferably, the fluid is gas, and the operating pressure of the high pressure cavity is 4~10MPa.
Preferably, the fluid is gas, a diameter of 3~5mm of the fluid channel.
Preferably, the fluid is liquid, a diameter of 3~10mm of the fluid channel.
Preferably, a diameter of 0.3~0.5mm of the radially outlet.
The utility model proposes transmission shaft, transmission shaft have air-bearing structure or oil float bearing arrangement.With air-bearing shafts
For bearing structure, which is made of air suspension shaft sleeve, bearing outer ring and sealing cover, has precise structure, volume size not
It arrests, passing power is accurate, minimum feature is lost in power transmission, the high pressure gas flowed out from radial through-hole, in transmission shaft and axis
One layer of air film is formed between set so that transmission shaft does not rub in rotation with axle sleeve, enables, mill sturdy and durable to such bearing
Loss rate is low.Due to improvement of the utility model transmission shaft on bearing arrangement, when the fluid in bearing is gas, transmission shaft
Rotating speed is up to 10000r/min or more.
Description of the drawings
Fig. 1 is the decomposition texture schematic diagram of one embodiment of the utility model transmission shaft；
Fig. 2 is the dimensional structure diagram of one embodiment air suspension shaft sleeve of the utility model transmission shaft；
Fig. 3 is the cross-sectional view of one embodiment air-bearing of the utility model transmission shaft；
Fig. 4 is the cross-sectional view of one embodiment motor of the utility model.
The embodiments will be further described with reference to the accompanying drawings for the realization, functional characteristics and advantage of the utility model aim.
Specific implementation mode
It should be appreciated that specific embodiment described herein is only used to explain the utility model, it is not used to limit this
Utility model.
Referring to Fig.1-4, the utility model proposes a kind of transmission shafts 2, including bearing 1, transmission shaft 2, locating plate 3, rotor
Group 4；
The rotor set 4 is installed on 2 middle part of the transmission shaft, and is fixed by two locating plates 3；
The transmission shaft 2 is installed in two bearings 1, is gap-matched between transmission shaft 2 and bearing 1；
The bearing 1 includes axle sleeve, bearing outer ring, sealing cover, and the axle sleeve is nested in the bearing outer ring, and is passed through
Sealing cover is fixed and closed so that high pressure cavity 16 is formed between the axle sleeve and the bearing outer ring；
The bearing outer ring is provided with fluid inlet 11, is connected to the high pressure cavity 16；
The axle sleeve is uniformly set in hollow cylindrical, including one or more fluid channel 15, the side plane of the axle sleeve
Multiple axially extending bores 12 are equipped with, the axially extending bore 12 is respectively communicated with the high pressure cavity 16 and the fluid channel 15；
The outer circle side of axle sleeve is provided with multiple radial through-hole 13, is yet formed between the axle sleeve and the bearing outer ring
Second cavity 17, second cavity 17 make each fluid channel 15 be connected to by the radial through-hole 13；
Axle sleeve inner circle side is evenly arranged with multiple radially outlets 14, is connected to the fluid channel 15, the diameter
It is less than the diameter of the fluid channel 15 to the diameter of outlet 14.
In the present embodiment, transmission shaft 2 includes bearing 1, transmission shaft 2, locating plate 3, rotor set 4.The utility model embodiment
It need to arrange in pairs or groups and use with the press device being adapted to.Such as when the fluid in high pressure cavity 16 be gas, then need to be equipped with corresponding height
Press air compressor machine or high-pressure cylinder.When the fluid in high pressure cavity 16 be hydraulic oil, then need to be equipped with corresponding hydraulic pressing unit.
Rotor set 4 is installed at 2 middle part of transmission shaft, 4 inside of rotor set has multiple slot positions, to place permanent magnet 5.When
Slot position inside rotor set 4 after placing permanent magnet 5, passes through position of the 3 fixed rotor group 4 of locating plate of the left and right sides on axis
It sets.The improvement of the utility model embodiment essentially consists in 1 structure division of bearing on axis, and the structure of other parts belongs to usual
Design, does not just repeat herein.
By taking the fluid in high pressure cavity 16 is gas as an example, the bearing 1 of the utility model embodiment is mainly by axle sleeve, bearing
Outer ring, sealing cover composition.Bearing 1 is merely shown as the external structure of bearing outer ring as illustrated in the drawing.Have one on bearing outer ring
Fluid inlet.
With reference to Fig. 2-4, the stereochemical structure of axle sleeve is as shown in Fig. 2, cylindrical.There is one or more fluid logical inside axle sleeve
Road 15, axle sleeve is nested in bearing outer ring, and is fixed by sealing cover.With the axially extending bore on side plane on axle sleeve
12, the radial through-hole 13 on outer circle side, the radially outlet 14 on inner circle side.Axially extending bore 12, radial through-hole 13, radially goes out
Mouth 14 is connected to fluid channel 15.
When bearing 1 works, high pressure gas is flowed by fluid inlet, into high pressure cavity 16, then passes through axially extending bore 12
Into the fluid channel 15 closest to high pressure cavity 16, flowed out from the radially outlet 14 of the fluid channel 15 between a part, separately
A part flows into the second cavity 17 through radial through-hole 13, then is flowed out through radial through-hole 13- fluid channel 15- radially outlets 14.This
Sample, high pressure gas form air film between transmission shaft 2 and bearing 1, secure the position of transmission shaft 2.
High pressure air film between transmission shaft 2 and bearing 1 so that transmission shaft 2 is not in contact with bearing 1, ensure that transmission
Axis 2 at high speed, low friction, smoothly operate.And hold the locating plate 3 of internal both sides in transmission shaft 2, equably bear from
The pressure that the air-flow that gap is overflowed between transmission shaft 2 and bearing 1 generates ensure that transmission shaft 2 in axial stability.Transmission shaft
The air film formed between 2 and axle sleeve has separated transmission shaft 2 and axle sleeve, ensure that transmission shaft 2 at high speed, low friction, it is steady
Ground operates.
Likewise, when fluid is liquid, the course of work is also similar with gas.
Optionally, the liquid is hydraulic oil, and the hydraulic oil is flowed into from the fluid inlet 11, into high pressure sky
Then chamber 16 flows into the fluid channel 15 from the axially extending bore 12, flowed out through the radially outlet 14.
In the present embodiment, the working fluid in 1 structure of bearing is hydraulic oil.Hydraulic oil is added by hydraulic pressing unit and is sealed
In chamber.After flowing through each channel, flowed out from through-hole.The recovered device recycling of hydraulic oil flowed out from through-hole, flows back to hydraulic pressurization and sets
It is standby, it recycles.
Optionally, there is a seal box in 1 outside of the bearing, for recycling the hydraulic oil flowed out from the radially outlet 14.
In the present embodiment, there is a seal box in 1 outside of bearing, and the hydraulic oil flowed out is flowed into through gravity in seal box.
Seal box bottom has an interface to be connected with hydraulic pressing unit.Hydraulic oil flows back to hydraulic pressing unit from seal box, supplements liquid
Press the hydraulic oil loss of pressurized equipment.
Optionally, the fluid is gas, and the gap between transmission shaft 2 and axle sleeve is 0.5-100 μm.Wherein, including 10 μ
m。
In the present embodiment, there is smaller gap between transmission shaft 2 and axle sleeve.Gap is excessive, then between transmission shaft 2 and axle sleeve
Stable air film can not be formed, gap is too small, then air-flow is difficult by gap, and transmission shaft 2 will produce larger rub with axle sleeve at this time
It wipes.
Optionally, the fluid is liquid, and the gap between the transmission shaft 2 and axle sleeve is 10-200 μm.Including
30μm。
In the present embodiment, there is smaller gap between transmission shaft 2 and axle sleeve.Gap is excessive, then between transmission shaft 2 and axle sleeve
Stable liquid film can not be formed, gap is too small, then fluid is difficult by gap, and transmission shaft 2 will produce larger rub with axle sleeve at this time
It wipes.
Optionally, the fluid inlet 11 is provided with one-way cock, and fluid is made uniaxially to flow into high pressure from fluid inlet 11
Cavity 16.The fluid is gas, and the operating pressure of high pressure cavity 16 is 4~10Mpa, preferably 6MPa.
In the present embodiment, fluid inlet 11 is provided with one-way cock, in this way when motor shuts down, high pressure cavity 16
Interior Fluid pressure will not decline immediately, but slowly decline, and reduce the abrasion between transmission shaft 2 and axle sleeve.It simultaneously can
It is different according to the rotating speed of motor, suitable operating pressure is set.
Optionally, a diameter of 3~10mm of the fluid channel 15, preferably 4mm.
In the present embodiment, axle sleeve is internally provided with a plurality of fluid channel 15.Fluid channel 15 may be configured as annular, so both
The difficulty of processing is reduced, but also air-flow is more steady.According to axle sleeve structure difference, the fluid channel of different item numbers can be set
15.For example, three fluid channels 15 can be set, every a diameter of 4mm.
Optionally, with reference to Fig. 2, a diameter of 0.3~0.5mm of the radially outlet 14, preferably 0.4mm.
In the present embodiment, multiple radially outlets 14 are evenly arranged on the inside of axle sleeve.Radially outlet 14 is born according to transmission shaft 2
The difference of pressure carries out different configurations.
It is the sectional view of a motor with reference to Fig. 4, Fig. 4.The transmission shaft of the application can be applied to electric motors.In Fig. 4
Motor further comprise casing 6 and end cap 7.Transmission shaft is installed on inside casing 6, and is fixed by end cap 7.
Transmission shaft 2 obtained in this way can be in generator, motor, polishing machine, gong machine, milling machine, marine propeller, paper machine
It uses in terms of tool, numerically-controlled machine tool, and succeeds in terms of practical application.
The utility model proposes transmission shaft, transmission shaft have air-bearing structure or oil float bearing arrangement.With air-bearing shafts
For bearing structure, which is made of air suspension shaft sleeve, bearing outer ring and sealing cover, has precise structure, volume size not
It arrests, passing power is accurate, minimum feature is lost in power transmission, the high pressure gas flowed out from radial through-hole, in transmission shaft and axis
One layer of air film is formed between set so that transmission shaft does not rub in rotation with axle sleeve, enables, mill sturdy and durable to such bearing
Loss rate is low.Due to improvement of the utility model transmission shaft on bearing arrangement, when the fluid in bearing is gas, transmission shaft
Rotating speed is up to 10000r/min or more.
The above description is only the embodiments of the present invention, is not intended to limit the utility model, for this field
Technical staff for, various modifications and changes may be made to the present invention.Within the spirit and principle of the utility model,
Any modification, equivalent replacement, improvement and so on should be included within the right of the utility model.
Claims (11)
1. a kind of transmission shaft, which is characterized in that including bearing, transmission shaft, locating plate, rotor set；
The rotor set is installed in the middle part of the transmission shaft, and is fixed by two locating plates；
The transmission shaft is installed in two bearings, is gap-matched between transmission shaft and bearing；
The bearing includes axle sleeve, bearing outer ring, sealing cover, and the axle sleeve is nested in the bearing outer ring, and passes through sealing
Lid is fixed and closed so that high pressure cavity is formed between the axle sleeve and the bearing outer ring；
The bearing outer ring is provided with fluid inlet, is connected to the high pressure cavity；
The axle sleeve is in hollow cylindrical, including one or more fluid channel, and the side plane of the axle sleeve is evenly arranged with more
A axially extending bore, the axially extending bore are respectively communicated with the high pressure cavity and the fluid channel；
The outer circle side of axle sleeve is provided with multiple radial through-hole, and the second sky is yet formed between the axle sleeve and the bearing outer ring
Chamber, second cavity make each fluid channel be connected to by the radial through-hole；
Axle sleeve inner circle side is evenly arranged with multiple radially outlets, is connected to the fluid channel, the radially outlet
Diameter is less than the diameter of the fluid channel.
2. transmission shaft according to claim 1, which is characterized in that contain fluid in the high pressure cavity, the fluid is
Gas or liquid.
3. transmission shaft according to claim 2, which is characterized in that the liquid is hydraulic oil.
4. transmission shaft according to claim 3, which is characterized in that have a seal box on the outside of the bearing, for recycle from
The hydraulic oil of the radially outlet outflow.
5. transmission shaft according to claim 2, which is characterized in that the fluid is gas, the transmission shaft and axle sleeve it
Between gap be 0.5-100 μm.
6. transmission shaft according to claim 2, which is characterized in that the fluid is liquid, the transmission shaft and axle sleeve it
Between gap be 10-200 μm.
7. transmission shaft according to claim 2, which is characterized in that the fluid inlet is provided with one-way cock.
8. transmission shaft according to claim 2, which is characterized in that the fluid is gas, the work of the high pressure cavity
Pressure is 4~10MPa.
9. transmission shaft according to claim 2, which is characterized in that the fluid is gas, the diameter of the fluid channel
For 3~5mm.
10. transmission shaft according to claim 2, which is characterized in that the fluid is liquid, the diameter of the fluid channel
For 3~10mm.
11. transmission shaft according to claim 1, which is characterized in that a diameter of 0.3~0.5mm of the radially outlet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721149836.3U CN207701581U (en) | 2017-09-08 | 2017-09-08 | Transmission shaft |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721149836.3U CN207701581U (en) | 2017-09-08 | 2017-09-08 | Transmission shaft |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207701581U true CN207701581U (en) | 2018-08-07 |
Family
ID=63021075
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721149836.3U Expired - Fee Related CN207701581U (en) | 2017-09-08 | 2017-09-08 | Transmission shaft |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207701581U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107514421A (en) * | 2017-09-08 | 2017-12-26 | 深圳市俊凯达科技有限公司 | Power transmission shaft and its application |
-
2017
- 2017-09-08 CN CN201721149836.3U patent/CN207701581U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107514421A (en) * | 2017-09-08 | 2017-12-26 | 深圳市俊凯达科技有限公司 | Power transmission shaft and its application |
| CN107514421B (en) * | 2017-09-08 | 2023-10-20 | 深圳市俊凯达科技有限公司 | Transmission shaft and application thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180807 Termination date: 20190908 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |