CN106167203B - A kind of ball-type slip axle housing and its slippage shaft assembly of application - Google Patents
A kind of ball-type slip axle housing and its slippage shaft assembly of application Download PDFInfo
- Publication number
- CN106167203B CN106167203B CN201610564820.2A CN201610564820A CN106167203B CN 106167203 B CN106167203 B CN 106167203B CN 201610564820 A CN201610564820 A CN 201610564820A CN 106167203 B CN106167203 B CN 106167203B
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- Prior art keywords
- ball
- inner ring
- axle housing
- inflatable part
- spacing
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- 230000000977 initiatory effect Effects 0.000 claims description 14
- RRHGJUQNOFWUDK-UHFFFAOYSA-N Isoprene Chemical compound CC(=C)C=C RRHGJUQNOFWUDK-UHFFFAOYSA-N 0.000 claims description 5
- 229920001195 polyisoprene Polymers 0.000 claims description 5
- 235000014676 Phragmites communis Nutrition 0.000 claims description 4
- 230000000694 effects Effects 0.000 claims description 4
- 239000000463 material Substances 0.000 description 13
- 238000004804 winding Methods 0.000 description 9
- 238000010586 diagram Methods 0.000 description 4
- 239000011324 bead Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000004080 punching Methods 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H75/00—Storing webs, tapes, or filamentary material, e.g. on reels
- B65H75/02—Cores, formers, supports, or holders for coiled, wound, or folded material, e.g. reels, spindles, bobbins, cop tubes, cans, mandrels or chucks
- B65H75/18—Constructional details
- B65H75/24—Constructional details adjustable in configuration, e.g. expansible
- B65H75/242—Expansible spindles, mandrels or chucks, e.g. for securing or releasing cores, holders or packages
- B65H75/246—Expansible spindles, mandrels or chucks, e.g. for securing or releasing cores, holders or packages expansion caused by relative rotation around the supporting spindle or core axis
- B65H75/247—Expansible spindles, mandrels or chucks, e.g. for securing or releasing cores, holders or packages expansion caused by relative rotation around the supporting spindle or core axis using rollers or rods moving relative to a wedge or cam surface
Landscapes
- Retarders (AREA)
- Snaps, Bayonet Connections, Set Pins, And Snap Rings (AREA)
Abstract
The invention discloses a kind of ball-type slip axle housing and its slippage shaft assembly of application, including the inner ring and outer rings for socket-connecting, some fixing holes are evenly arranged with the outer shroud, formed for ball along the radially movable chamber of inner ring between fixing hole and inner ring, some eccentric groves for ball to be pushed outwardly are provided with the outer surface of the inner ring, the side of the inner ring is stop side, radially projection has baffle ring for the stop side, the opposite side of the inner ring is active side, the outer shroud is from active side set to the inner ring, the active side offers and the dismounting groove for taking out ball is connected with eccentric grove, lock slots are provided with the active side, the lock slots stop that outer shroud departs from inner ring by a snap ring.The present invention is intended to provide a kind of ball-type slip axle housing of convenient disassembly and its slippage shaft assembly of application.
Description
Technical field
The present invention relates to axle sleeve field, more specifically it is related to a kind of ball-type slip axle housing and a kind of slip shaft group
Part.
Background technology
Slip shaft is to collect field in the cutting of film, paper, is occurred for the tension force on each aspect on control Scroll
A kind of axle, and slip axle housing is then to be enclosed within outside slip shaft to be used for fixation and collect the important component of thing.
A kind of ball-type slippage air-expanding shaft is disclosed in the Chinese invention patent of Publication No. CN203806774U, including
Have an air-expanding shaft, the front-end and back-end of the air-expanding shaft are respectively equipped with front shaft sleeve and rear axle housing, and positioned at front shaft sleeve and rear axle housing it
Between be provided with row's ball-type differential slip ring, be provided with pad between two neighboring ball-type differential slip ring；The air-expanding shaft is located at the rolling
Surface at bead differential slip ring is provided with multigroup inflatable friction means of circumferential array arrangement, and front end is provided with swivel joint, described
Swivel joint is connected by the air flue being provided with inside air-expanding shaft with inflatable friction component.
Current slip axle housing is assembled by the means of punching press, seamless welding, once its internal part has been damaged difficulty
With detachable maintaining, it would be highly desirable to improve.
The content of the invention
In view of the shortcomings of the prior art, the first goal of the invention of the invention is to provide a kind of ball of convenient disassembly
Formula slip axle housing.
To achieve the above object, the invention provides following technical scheme：A kind of ball-type slip axle housing, including socket-connect
Inner ring and outer rings, some fixing holes are evenly arranged with the outer shroud, between fixing hole and inner ring formed for ball along in
The radially movable chamber of ring, is provided with some eccentric groves for ball to be pushed outwardly on the outer surface of the inner ring, wherein：
The side of the inner ring is stop side, and projection has baffle ring on the outside of the lateral inner ring of the stop, and the opposite side of the inner ring is active side,
From active side set to the inner ring, the active side to offer connected with eccentric grove takes out the dismounting of ball to the outer shroud
Groove, lock slots are provided with the active side, and the lock slots stop that outer shroud departs from inner ring vertically by a snap ring.
By using above-mentioned technical proposal, when dismounting this ball-type slip axle housing is needed, it is only necessary to which snap ring is unloaded, rotate
Outer shroud is just then taking out the dismounting that ball is capable of achieving slip axle housing up to ball to dismounting groove, similarly can also realize assembling.From
And reach the purpose for quickly, simply dismounting slip axle housing.
The present invention is further arranged to:The eccentric grove includes initiating terminal and clearing end, the initiating terminal to inner ring center
Distance of the distance less than clearing end to inner ring center, and the initiating terminal and clearing end rounding off.
By using above-mentioned technical proposal, sliding axially for ball is realized using eccentric grove, its overall resistance is small, structure is closed
Reason.
The present invention is further arranged to：The clearing end is provided with when ball is in clearing end with ball towards initiating terminal
Side contradict non-return component, the non-return component include through inner ring and with inner ring axially is flexibly connected locating part, holding
Elastic component of the locating part towards inner ring central movable.
By using above-mentioned technical proposal, during ball is by the rotarily driving and be pushed out to range of eccentric grove,
Across non-return component, and after ball reaches range, ball is blocked spacing ball by non-return component, it is to avoid ball is in slippage
Axle sleeve skid when cause because of the rotatory inertia of outer shroud retraction, be effectively ensured slip axle housing in the running with by between winding material
Effective holding, improve its winding precision.
The present invention is further arranged to：The elastic component is the elastic caoutchouc being sticked in eccentric trench bottom, the locating part
Outer end be fixedly connected with elastic caoutchouc.
By using above-mentioned technical proposal, elastic component is arranged in eccentric grove, is prevented effectively from elastic component to driving shaft
Rotation causes interference, it is ensured that the stability of its structure.
The present invention is further arranged to：The elastic component is the reed being sticked in interior ring inner surface, the elastic component and spring
Piece is fixedly connected.
By using above-mentioned technical proposal, elastic component is arranged on interior ring inner surface so that elastic component removes and installs nothing
Slip shaft need to be opened in itself, facilitate it to safeguard.
The present invention is further arranged to：Locating part one end end face inwardly is set to sphere.
By using above-mentioned technical proposal, using sphere significantly reduce when driving shaft rotates locating part and driving shaft it
Between friction.
Second goal of the invention of the invention is to provide a kind of slippage shaft assembly for winding high precision.
To achieve the above object, the invention provides following technical scheme：A kind of ball-type slippage shaft assembly, including actively
Axle and above-mentioned ball-type slip axle housing, wherein：Air flue is provided with the driving shaft, is set side by side with the air flue dynamic
Strength is swollen part and spacing inflatable part, the power inflatable part is connected to individual gas sources, the power gas with spacing inflatable part
Swollen part is fixedly connected with the hard contact part for being fitted with inner ring, the number of the spacing inflatable part with spacing inflatable part outside
Amount, position and non-return component are just right.
By using above-mentioned technical proposal, master is realized using power inflatable part and the contact being connected with power inflatable part
Moving axis and the transmission of slip axle housing, while being controlled the state of non-return component using spacing inflatable part, are reached accurate to non-return component
The effect of control.
The present invention is further arranged to：The non-return component is disposed as one group with spacing inflatable part.
By using above-mentioned technical proposal, the non-return component that single group is set simplifies the whole of slip axle housing with spacing inflatable part
Body structure, facilitates its production, uses.
The present invention is further arranged to：The non-return component, spacing inflatable part quantity it is identical with eccentric grove quantity.
By using above-mentioned technical proposal, multigroup non-return component, the setting of spacing inflatable part strengthen non-return component for
The controling power of ball, is prevented effectively from ball retraction.
The present invention is further arranged to：The power inflatable part is air bag, and the power inflatable with spacing inflatable part
Negative pressure pump is respectively connected with part and spacing inflatable part.
By using above-mentioned technical proposal, when slip shaft works completion, the gas in air bag is extracted by negative pressure pump, protected
Card contact retraction, makes locating part be moved towards inner ring center in the presence of elastic component, it is ensured that ball energy after slip shaft stopping
Effectively retraction is so as to the material of removal winding.
Compared with prior art, the present invention has advantages below：
1st, using plug-in axle sleeve structure, assemble, dismantle it is very convenient；
2nd, with ball non-return component, be prevented effectively from influences winding precision when slip axle housing skids because ball bounces back；
3rd, double control airbag structure, independent control slip axle housing state and non-return component states, control accuracy is high, property
Can stabilization.
Brief description of the drawings
Fig. 1 is the structural representation of ball-type slippage shaft assembly in embodiment 1；
Fig. 2 is the stereoscopic mechanism schematic diagram of ball-type slip axle housing in embodiment 1；
Fig. 3 is the front schematic view of ball-type slip axle housing in embodiment 1；
Fig. 4 is the exploded perspective view of ball-type slip axle housing in embodiment 1；
Fig. 5 is the initial configuration schematic diagram of non-return component in embodiment 2；
Fig. 6 is the theory structure schematic diagram of non-return component in embodiment 2；
Fig. 7 is the initial configuration schematic diagram of non-return component in embodiment 3.
Reference：1st, driving shaft；11st, air flue；12nd, power inflatable part；13rd, spacing inflatable part；14th, contact；2nd, roll
Bead slip axle housing；21st, inner ring；211st, eccentric grove；212nd, initiating terminal；213rd, clearing end；22nd, outer shroud；221st, fixing hole；23、
Stop side；24th, active side；25th, baffle ring；26th, groove is dismantled；27th, lock slots；28th, snap ring；3rd, ball；4th, non-return component；41st, bullet
Property part；42nd, locating part.
Specific embodiment
Below in conjunction with accompanying drawing, the present invention will be further described.
Embodiment 1：A kind of ball-type slippage shaft assembly, including driving shaft 1, slip axle housing, driving shaft 1 are uniformly arranged 4
Air flue 11, in air flue 11 built with the power inflatable part 12 being made up of air bag.Source of the gas is connected with the power inflatable part 12.It is some
Slip axle housing is enclosed within outside driving shaft 1 side by side, causes that its power inflatable part 12 expands by the inflation in power inflatable part 12, from
And increase the frictional force between power inflatable part 12 and slip axle housing, slip shaft is driven also through the frictional force by driving shaft 1
Set rotation.
This slip axle housing is the formula slip axle housing 2 of ball 3, is combined by the inner ring 21 that is mutually socketed, outer shroud 22.In inner ring
There are 6 eccentric groves 211 of setting 21 left and right sides respectively, and the eccentric grove 211 is included away from the nearer initiating terminal in the center of inner ring 21
212 and the clearing end 213 away from the center of inner ring 21 farther out.Initiating terminal 212 and the rounding off of clearing end 213.The both sides of outer shroud 22
Correspondence eccentric grove 211 is provided between fixing hole 221, and fixing hole 221 and eccentric grove 211 and is formed for ball 3 along the footpath of inner ring 21
To the chamber of activity.By rotating outer shroud 22 so that ball 3 is movable to clearing end 213 along the initiating terminal 212 of eccentric grove 211, from
And ejection and the retraction of ball 3 are realized using the eccentric grove 211.
The left side of inner ring 21 is stop side 23, and inner ring 21 has radially towards the baffle ring of outer lug in the stop side 23
25.The right side of inner ring 21 is active side 24, and the side does not have any projection higher than the outer surface of inner ring 21 at least.Outer shroud 22 is by living
Inner ring 21 is inserted in until being contradicted with stop side 23 in dynamic side 24.In active side 24, connected with the initiating terminal 212 with eccentric grove 211
Dismounting groove 26, and fixing hole 221 on outer shroud 22 extends to its outer so that when fixing hole 221 with dismounting groove 26 just
Pair when, ball 3 can easily from eccentric grove 211 along dismounting groove 26 deviate from.
Lock slots 27 are additionally provided with active side 24, the snap ring 28 of snapping one on the lock slots 27, and the snap ring 28 and outer shroud
22 contradict, so as to limit the axially activity of outer shroud 22.Under the support of said structure, the formula slip axle housing 2 of this ball 3 need to be dismantled
When, it is only necessary to snap ring 28 is removed, rotation outer shroud 22 to fixing hole 221 is just right with dismounting groove 26, takes out right side ball 3.To the right
Slide outer shroud 22 and take out outer shroud 22, it is simple and convenient.If need to assemble again simultaneously, it is only necessary to be by opposite step assembling
Can.Realize the repetition dismounting of slip axle housing.
Embodiment 2, the difference with embodiment 1 is：Non-return component 4, the air flue 11 of driving shaft 1 are provided with eccentric grove 211
In inflatable part be divided into the spacing inflatable part 13 of power inflatable part 12 that control inner ring 21 rotates and control non-return component 4.
Non-return component 4 includes elastic component 41 and shaft-like locating part 42.Opened up near the clearing end 213 of eccentric grove 211
There is fixing hole 221, locating part 42 is located in the fixing hole 221.Specifically, when ball 3 is in the extreme position of clearing end 213
When, locating part 42 is contradicted in ball 3 towards the side of initiating terminal 212 just.Elastic component 41 is a sheet of elastic caoutchouc, the bullet
Property part 41 be sticked in the two ends of the bottom of eccentric grove 211 and elastic component 41 and the fixed bonding of eccentric grove 211, elastic component 41 is covered with whole
Individual eccentric grove 211.The outer end of locating part 42 is connected with elastic component 41 by being adhesively fixed.
The power inflatable part 12 being made up of air bag is placed in air flue 11 side by side with spacing inflatable part 13, while either starting
End 212 and clearing end 213 or power inflatable part 12 are with spacing inflatable part 13 along the arrangement clockwise of slip axle housing.And it is spacing
The position of inflatable part 13 is just right with locating part 42.Power inflatable part 12 and the surface of spacing inflatable part 13 be respectively fixedly connected with by
The contact 14 that hard material is made.Air bag is contacted by contact 14 with inner ring 21, locating part 42.Power inflatable part 12 and limit
Independent source of the gas and negative pressure pump is connected respectively on position inflatable part 13, to independent control power inflatable part 12 and spacing inflatable part
13。
The principle of the present embodiment 2 is：Common slip shaft wind material when, because each position easily occurs on material
Dimensional discrepancy, cause slip shaft when material is wound, tension force suffered by each position is different on its axle.And slip axle housing is root
It is made according to the principle, when frictional force is less than the tension force outside slip axle housing between air bag and inner ring 21, skidding occurs in slip axle housing,
So as to slow down the winding of the partial material, the tension force of each position of material is thus balanced.But in actual production process, Shen
Ask someone to find, once any slip axle housing on driving shaft 1 starts to skid, the skidding frequency of each slip axle housing is notable after that
Rise, and be very easy to fold occur on the material of winding.It has been investigated that, in slip axle housing because tension factor causes inner ring 21
When occurring skidding between driving shaft 1, the one side of outer shroud 22 has inertia, and on the other hand because of the drive of material, outer shroud 22 is easy
It is rotated further.Thus, the rotarily driving so that ball 3 produces retraction because of outer shroud 22 of ball 3.Cause ball 3 and feed separation.Shadow
The contact precision between ball 3 and material is rung, or even radial direction has been generated to material during ball 3 goes out ejection again and rushed
Power is hit, causes material fold occur.And in this programme, when slip shaft is started working, punching press of first being pressurizeed to power inflatable part 12,
So that power inflatable part 12 controls inner ring 21 to rotate by contact 14, until inner ring 21 causes rolling with the relative motion of outer shroud 22
After pearl 3 is moved to the ejection of clearing end 213, then pressurization inflation is carried out to spacing inflatable part 13 so that spacing inflatable part 13 is by connecing
Contact element 14 outwards pushes locating part 42 so that the outer end of locating part 42 contradicts with ball 3, prevents ball 3 from bouncing back.Work as slip axle housing
Outside tension force more than contact 14 and inner ring 21 frictional force when, skidding occurs with inner ring 21 in driving shaft 1, but power inflatable
Part 12 remains inflated condition with spacing inflatable part 13, therefore contact 14 is contacted with inner ring 21 all the time.Even if so spacing gas
Swollen part 13 is separated with locating part 42, and locating part 42 can still be contradicted with the surface of driving shaft 1, it is ensured that locating part 42 is to ball 3
It is spacing.After the completion of winding, more than driving shaft 1 and the frictional force of inner ring 21, driving shaft 1 skids outside tension force with inner ring 21,
Now power inflatable part 12 is evacuated with spacing inflatable part 13 simultaneously by negative pressure pump so that contact 14 bounces back.Reduce simultaneously
The rotating speed of driving shaft 1.When locating part 42 is moved again to spacing inflatable part 13 just pair, the side of locating part 42 and air flue 11
Contradict, while locating part 42 is moved by the active force of elastic component 41 to air flue 11.So as to unlock limit of the locating part 42 to ball 3
Position.Enable that ball 3 bounces back and feed separation.And then complete winding.
The present embodiment 3, the difference with embodiment 2 is that the elastic component 41 in non-return component 4 is positioned at the madial wall of inner ring 21
On elastic metallic reed, the inner end of locating part 42 is fixedly connected with the metal spring leaf.When this slip axle housing is not installed or not
During startup, the outer end of locating part 42 is tensed by metal spring leaf and makes it concordant with the bottom of eccentric grove 211.Thus its non-return group is facilitated
The dismounting of part 4, installation.
Presently preferred embodiments of the present invention is the foregoing is only, is not intended to limit the invention, it is all in design structure of the invention
Within think of, any modification, equivalent substitution and improvements made etc. should be included within the scope of the present invention.
Claims (8)
1. a kind of ball-type slip axle housing, including the inner ring (21) that socket-connects and outer shroud (22), uniformly set on the outer shroud (22)
Some fixing holes (221) are equipped with, form radially living along inner ring (21) for ball (3) between fixing hole (221) and inner ring (21)
Dynamic chamber, is provided with some eccentric groves (211) for ball (3) to be pushed outwardly on the outer surface of the inner ring (21),
It is characterized in that：The side of the inner ring (21) is stop side (23), and there is baffle ring the stop side (23) to projection on the outside of inner ring
(25), the opposite side of the inner ring (21) is active side (24), and the outer shroud (22) is covered to inner ring (21) from the active side (24)
On, the active side (24) to offer connected with eccentric grove (211) takes out the dismounting groove (26) of ball (3), the activity
Lock slots (27) are provided with side (24), the lock slots (27) stop that outer shroud (22) departs from inner ring vertically by a snap ring (28)
(21), the eccentric grove (211) includes initiating terminal (212) and clearing end (213), in the initiating terminal (212) to inner ring (21)
The distance of the heart is less than clearing end (213) to the distance at inner ring (21) center, and the initiating terminal (212) and clearing end (213) circle
Slip over and cross, the clearing end (213) is provided with when ball (3) is in clearing end (213) with ball (3) towards initiating terminal
(212) the non-return component (4) that side contradicts, the non-return component (4) through inner ring (21) and with inner ring (21) including axially living
Move the locating part (42) of connection, keep elastic component (41) of the locating part (42) towards inner ring (21) central movable.
2. a kind of ball-type slip axle housing according to claim 1, it is characterized in that：The elastic component (41) is to be sticked inclined
The elastic caoutchouc of heart groove (211) bottom, the outer end of the locating part (42) is fixedly connected with elastic caoutchouc.
3. a kind of ball-type slip axle housing according to claim 1, it is characterized in that：The elastic component (41) to be sticked including
The reed of ring (21) inner surface, the elastic component (41) is fixedly connected with reed.
4. a kind of ball-type slip axle housing according to claim 2, it is characterized in that：The locating part (42) one end inwardly
End face is set to sphere.
5. a kind of ball-type slippage shaft assembly, it is characterized in that：Including driving shaft (1) and such as any institute of Claims 1-4
Ball (3) formula slip axle housing (2) stated, is provided with air flue (11), the air flue (11) on the driving shaft (1) and is set up in parallel
Dynamic inflatable part (12) and spacing inflatable part (13), the power inflatable part (12) are connected respectively with spacing inflatable part (13)
There are individual gas sources, the power inflatable part (12) has been fixedly connected with for being pasted with inner ring (21) with spacing inflatable part (13) outside
The hard contact part (14) of conjunction, the quantity of the spacing inflatable part (13), position and non-return component (4) are just right.
6. a kind of ball-type slippage shaft assembly according to claim 5, it is characterized in that：The non-return component (4) with it is spacing
Inflatable part (13) is disposed as one group.
7. a kind of ball-type slippage shaft assembly according to claim 6, it is characterized in that：The non-return component (4), spacing gas
The quantity of swollen part (13) is identical with eccentric grove (211) quantity.
8. a kind of ball-type slippage shaft assembly according to claim 6 or 7, it is characterized in that：The power inflatable part (12)
Air bag is with spacing inflatable part (13), and be respectively connected with negative pressure on the power inflatable part (12) and spacing inflatable part (13)
Pump.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610564820.2A CN106167203B (en) | 2016-07-16 | 2016-07-16 | A kind of ball-type slip axle housing and its slippage shaft assembly of application |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610564820.2A CN106167203B (en) | 2016-07-16 | 2016-07-16 | A kind of ball-type slip axle housing and its slippage shaft assembly of application |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106167203A CN106167203A (en) | 2016-11-30 |
| CN106167203B true CN106167203B (en) | 2017-06-30 |
Family
ID=58064431
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610564820.2A Active CN106167203B (en) | 2016-07-16 | 2016-07-16 | A kind of ball-type slip axle housing and its slippage shaft assembly of application |
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| CN (1) | CN106167203B (en) |
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| CN109502429A (en) * | 2018-11-27 | 2019-03-22 | 深圳市科晶智达科技有限公司 | Slip shaft |
| CN117899352B (en) * | 2024-03-20 | 2024-07-05 | 苏州同心医疗科技股份有限公司 | Ventricular connection device and ventricular connection system |
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| CN102583096A (en) * | 2012-02-24 | 2012-07-18 | 常熟市振宇胶带有限公司 | Friction type slitting and wrapping-up device for paper tubes |
| CN203474019U (en) * | 2013-09-13 | 2014-03-12 | 潍坊胜达塑胶有限公司 | Slip shaft for production of release film |
| CN103879810A (en) * | 2014-04-11 | 2014-06-25 | 美塞斯（珠海保税区）工业自动化设备有限公司 | Ball-type slip air expansion shaft |
| CN204057506U (en) * | 2014-07-12 | 2014-12-31 | 瑞安市创博机械有限公司 | Gas expansion shaft |
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|---|---|
| CN106167203A (en) | 2016-11-30 |
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