CN111703979A - Mechanical expansion shaft - Google Patents
Mechanical expansion shaft Download PDFInfo
- Publication number
- CN111703979A CN111703979A CN202010551836.6A CN202010551836A CN111703979A CN 111703979 A CN111703979 A CN 111703979A CN 202010551836 A CN202010551836 A CN 202010551836A CN 111703979 A CN111703979 A CN 111703979A
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- CN
- China
- Prior art keywords
- sleeve
- screw rod
- shaft
- key
- nut
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- 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.)
- Pending
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Classifications
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- 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
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- Winding Of Webs (AREA)
Abstract
The invention discloses a mechanical expansion shaft which comprises a shaft sleeve, a screw rod, a rotation limiting sleeve, an adjusting nut and a nut limiting mechanism, wherein a plurality of first key grooves are formed in the outer wall of the shaft sleeve, and a first key strip is arranged in each key groove; the screw rod is positioned in the shaft sleeve, and the front end and the rear end of the screw rod respectively extend out of the two ends of the shaft sleeve; the rotation limiting sleeve is sleeved on the screw rod and is fixedly arranged at the front end of the shaft sleeve; the nut limiting mechanism is arranged on the rotation limiting sleeve, the adjusting nut is arranged on the nut limiting mechanism, and the front section of the screw rod is positioned in a screw hole of the adjusting nut; the thickness of each key bar is gradually increased from front to back, and the inner side surface of each key bar is provided with a first inclined surface; be equipped with a plurality of wedges on the lead screw, the same and the one-to-one of quantity of wedge and keybar, the thickness of each wedge all reduces from front to back gradually, the lateral surface of wedge be equipped with first inclined plane complex second inclined plane, second inclined plane and first inclined plane contact cooperation. The invention can better position the paper tube and avoid the paper tube from moving.
Description
Technical Field
The invention relates to the technical field of film processing, in particular to a mechanical expansion shaft.
Background
At present, after plastic particles are heated and melted by a film blowing machine and blown into a film, the manufactured film product needs to be wound on a paper tube by a winding machine. When the film is used, the film needs to be unreeled from the paper tube. When the film is wound or unwound, the paper tube needs to be fixed on the winding shaft or the unwinding shaft, so that the paper tube can rotate along with the rotation of the winding shaft or the unwinding shaft. Generally, a method for fixing a paper tube is to set a winding shaft or an unwinding shaft as an inflatable shaft, and to use a key strip on the inflatable shaft to push against the inner side wall of the paper tube, so as to position the paper tube. For example, a patent is CN 201420823874.2's utility model patent discloses an physiosis axle for electron carrier paper tape rewinding, including the spindle nose at axle body and axle body both ends, the axle body is the hollow shaft, is equipped with the air cock on the hollow shaft wall at axle body both ends respectively, and crisscross on the hollow shaft wall of axle body is equipped with the keyway, is equipped with the keybar in the keyway, and hollow part of hollow shaft is equipped with the physiosis cover, and the keybar inner bottom is connected with physiosis cover overcoat wall is adjacent, and the air cock leads to mutually with the physiosis cover and forms the inflatable space. The inflatable sleeve of the inflatable shaft is inflated to eject the key strip out of the key groove, so that the outer end surface of the key strip abuts against the inner wall of the paper tube, the whole paper tube is expanded, the paper tube is positioned, and the paper tube is prevented from moving. However, the inflatable sleeve inside the inflatable shaft is generally an airbag, the gas in the airbag has fluidity, and when the film is rolled, the film wound on the paper tube is thicker and heavier, the weight of the paper tube is heavier and heavier, and the gas in the airbag cannot well support the key strip, so that the gas in the airbag is easy to deflect to one side to cause the eccentricity of the airbag, the key strip is trapped in the key groove, even the airbag is broken, the outer end surface of the key strip cannot abut against the inner wall of the paper tube, the paper tube cannot be positioned, and the paper tube is moved.
Disclosure of Invention
The invention aims to solve the problem of providing a mechanical expansion shaft which can better position a paper tube and avoid the paper tube from moving.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows:
a mechanical expansion shaft comprises a shaft sleeve, wherein a plurality of first key grooves are formed in the outer wall of the shaft sleeve, and a first key strip is arranged in each first key groove; the method is characterized in that: the screw rod is positioned in the shaft sleeve, and the front end and the rear end of the screw rod respectively extend out of the two ends of the shaft sleeve; the rotation limiting sleeve is sleeved on the screw rod and is fixedly arranged at the front end of the shaft sleeve; the nut limiting mechanism is arranged on the rotation limiting sleeve, the adjusting nut is arranged on the nut limiting mechanism, and the front section of the screw rod is positioned in a screw hole of the adjusting nut; the thickness of each first keybar is gradually increased from front to back, and a first inclined plane is arranged on the inner side face of each first keybar; be equipped with a plurality of wedges on the lead screw, the quantity of wedge is the same and the one-to-one with the quantity of first keybar, and the thickness of each wedge all reduces from preceding to back gradually, and the lateral surface of wedge is equipped with the second inclined plane with first inclined plane complex, second inclined plane and first inclined plane contact cooperation.
During the use, install the fiber container on the axle sleeve earlier, reuse spanner forward to twist and move adjusting nut, adjusting nut rotates at the normal position under nut stop gear's spacing, along with adjusting nut's rotation, make the lead screw along the axial rearward movement of axle sleeve, each wedge on the lead screw also along with the lead screw rearward movement, because each wedge is thick before thick after thin, thin before thin after each first key strip, second inclined plane on the wedge lateral surface extrudes the first inclined plane on the first key strip medial surface gradually and receives the direction of each first inclined plane in the in-process that moves backward, make the front end on thicker second inclined plane receive the front end oppression on thicker first inclined plane, push out first key strip from first keyway, make the outer terminal surface of first key strip withstand the inner wall of fiber container, expand tightly whole fiber container, fix a position the fiber container, avoid the fiber container to take place to move.
When the paper tube is to be taken down from the shaft sleeve, only the adjusting nut needs to be reversely screwed by a wrench, along with the rotation of the adjusting nut, the screw rod moves forwards along the axial direction of the shaft sleeve, each wedge block on the screw rod also moves forwards along with the screw rod, and the second inclined plane on the outer side surface of the wedge block is disengaged from the first inclined plane on the inner side surface of the first key strip in the process of moving forwards, so that the first key strip is sunk into the first key groove, the support for the inner wall of the paper tube is loosened, and the paper tube can be easily taken down from the shaft sleeve.
As a preferable scheme of the present invention, a rotation limiting structure capable of limiting rotation of the screw rod is arranged between the rotation limiting sleeve and the screw rod, the rotation limiting structure includes a second key groove arranged on an inner side wall of the rotation limiting sleeve and a second key strip arranged on the screw rod, the second key groove extends along an axial direction of the rotation limiting sleeve, the second key strip is fixedly mounted on a front section of the screw rod through a screw, and the second key strip is located in the second key groove. The second key bar on the screw rod is positioned in the second key groove on the inner side wall of the rotation limiting sleeve, the screw rod can be positioned, the rotation of the screw rod is limited, and when the adjusting nut rotates, the screw rod can move backwards along the axial direction of the shaft sleeve, so that the alignment accuracy of the second inclined plane on the outer side face of the wedge-shaped block and the first inclined plane on the inner side face of the first key bar is ensured.
As a preferable scheme of the invention, the nut limiting mechanism comprises a positioning sleeve and an adjusting sleeve, the rear end of the positioning sleeve is mounted on the rotation limiting sleeve, the inner cavity of the positioning sleeve is communicated with the inner cavity of the shaft sleeve, the front section of the screw rod is located in the positioning sleeve, the adjusting sleeve is rotatably mounted at the front end of the positioning sleeve, the adjusting nut is located in the adjusting sleeve, and the outer ring of the adjusting nut is fixedly connected with the inner side wall of the adjusting sleeve. Because the outer lane of adjusting nut and the inside wall fixed connection of adjusting collar, can directly rotate the adjusting collar and make adjusting nut rotate, in addition the location of position sleeve to the adjusting collar, so can make adjusting nut rotate at the normal position.
As a further preferable scheme of the invention, the front end of the positioning sleeve is provided with an annular groove, the rear end of the adjusting sleeve is provided with a snap ring, and the snap ring is positioned in the annular groove. Through the arrangement, the snap ring at the rear end of the adjusting sleeve can rotate in the annular groove at the front end of the positioning sleeve, so that the adjusting sleeve can be rotatably arranged at the front end of the positioning sleeve.
As a further preferable scheme of the invention, the nut limiting mechanism further comprises a handle, and the handle is fixedly connected with the front end of the rotation limiting sleeve. The front end fixed connection who sets up handle and limit and change the cover increases the area of holding that operating personnel adjusted adjusting nut, makes things convenient for operating personnel to adjust.
Compared with the prior art, the invention has the following advantages:
this kind of mechanical type axle that expands can support first keybar better, avoids first keybar to be absorbed in first keyway, can make the outer terminal surface of first keybar stabilize and to withstand the inner wall of fiber container, fixes a position the fiber container better, avoids the fiber container to take place to move.
Drawings
FIG. 1 is a schematic block diagram of an embodiment of the present invention;
FIG. 2 is an enlarged view of A in FIG. 1;
FIG. 3 is a cross-sectional view B-B of FIG. 2;
fig. 4 is a perspective view of an embodiment of the present invention.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.
As shown in fig. 1 to 4, the mechanical expansion shaft in this embodiment includes a shaft sleeve 1, a screw rod 2, a rotation limiting sleeve 3, an adjusting nut 4 and a nut limiting mechanism 5, wherein a plurality of first key slots 11 are provided on an outer wall of the shaft sleeve 1, and each first key slot 11 is provided with a first key strip 12; the screw rod 2 is positioned in the shaft sleeve 1, and the front end and the rear end of the screw rod 2 respectively extend out of the two ends of the shaft sleeve 1; the rotation limiting sleeve 3 is sleeved on the screw rod 2 and fixedly arranged at the front end of the shaft sleeve 1; the nut limiting mechanism 5 is arranged on the rotation limiting sleeve 3, the adjusting nut 4 is arranged on the nut limiting mechanism 5, and the front section 21 of the screw rod 2 is positioned in a screw hole of the adjusting nut 4; the thickness of each first keybar 12 is gradually increased from front to back, and a first inclined surface 121 is arranged on the inner side surface of each first keybar 12; the screw rod 2 is provided with a plurality of wedge blocks 22, the number of the wedge blocks 22 is the same as that of the first key bars 12, the wedge blocks 22 correspond to one another one by one, the thickness of each wedge block 22 is gradually reduced from front to back, a second inclined surface 221 matched with the first inclined surface 121 is arranged on the outer side surface of each wedge block 22, and the second inclined surface 221 is in contact fit with the first inclined surface 121.
Be equipped with between limit commentaries on classics cover 3 and the lead screw 2 and restrict 2 pivoted limit commentaries on classics structure 6, limit commentaries on classics structure 6 including setting up second keyway 31 on the inside wall of limit commentaries on classics cover 3 and set up the second keybar 23 on lead screw 2, the axial extension of limit commentaries on classics cover 3 is followed to second keyway 31, and second keybar 23 passes through screw fixed mounting on the anterior segment 21 of lead screw 2, and second keybar 23 is in second keyway 31. The second key bar 23 on the screw rod 2 is positioned in the second key groove 31 on the inner side wall of the rotation limiting sleeve 3, the screw rod 2 can be positioned, the rotation of the screw rod 2 is limited, when the adjusting nut 4 rotates, the screw rod 2 can move backwards along the axial direction of the shaft sleeve 1, and the second inclined surface 221 on the outer side surface of the wedge block 22 is ensured to be aligned accurately with the first inclined surface 121 on the inner side surface of the first key bar 12.
The nut limiting mechanism 5 comprises a positioning sleeve 51, an adjusting sleeve 52 and a handle 53, the rear end of the positioning sleeve 51 is arranged on the rotation limiting sleeve 3, the inner cavity of the positioning sleeve 51 is communicated with the inner cavity of the shaft sleeve 1, the front section 21 of the screw rod 2 is positioned in the positioning sleeve 51, the adjusting sleeve 52 is rotatably arranged at the front end of the positioning sleeve 51, the adjusting nut 4 is positioned in the adjusting sleeve 52, and the outer ring of the adjusting nut 4 is fixedly connected with the inner side wall of the adjusting sleeve 52; the handle 53 is fixedly connected with the front end of the rotation limiting sleeve 3. Because the outer ring of the adjusting nut 4 is fixedly connected with the inner side wall of the adjusting sleeve 52, the adjusting sleeve 52 can be directly rotated to rotate the adjusting nut 4, and the positioning sleeve 51 positions the adjusting sleeve 52, so that the adjusting nut 4 can be rotated in situ. Set up handle 53 and the front end fixed connection of limit commentaries on classics cover 3, increase the area of holding that operating personnel adjusted adjusting nut 4, make things convenient for operating personnel to adjust.
The front end of the positioning sleeve 51 is provided with an annular groove 511, the rear end of the adjusting sleeve 52 is provided with a snap ring 521, and the snap ring 521 is positioned in the annular groove 511. With this arrangement, the snap ring 521 at the rear end of the adjusting sleeve 52 can rotate in the annular groove 511 at the front end of the positioning sleeve 51, so that the adjusting sleeve 52 can be rotatably mounted at the front end of the positioning sleeve 51.
When the paper tube is used, the paper tube is firstly installed on the shaft sleeve 1, the adjusting nut 4 is screwed forward by a wrench, the adjusting nut 4 rotates in situ under the limit of the nut limiting mechanism 5, the screw rod 2 moves backward along the axial direction of the shaft sleeve 1 along with the rotation of the adjusting nut 4, each wedge block 22 on the screw rod 2 also moves backward along with the screw rod 2, as each wedge block 22 is thick in front and thin in back and each first key strip 12 is thin in front and thick in back, the second inclined plane 221 on the outer side surface of each wedge block 22 gradually extrudes the first inclined plane 121 on the inner side surface of the first key strip 12 in the backward moving process and is guided by each first inclined plane 121, the front end of the thicker second inclined plane 221 is pressed by the front end of the thicker first inclined plane 121, the first key strip 12 is ejected out of the first key slot 11, the outer end surface of the first key strip 12 is pressed against the inner wall of the paper tube, and the whole paper tube is expanded, the paper tube is positioned, and the paper tube is prevented from moving.
When the paper tube is to be taken down from the shaft sleeve 1, the adjusting nut 4 is only required to be reversely screwed by a wrench, along with the rotation of the adjusting nut 4, the screw rod 2 moves forwards along the axial direction of the shaft sleeve 1, each wedge block 22 on the screw rod 2 also moves forwards along with the screw rod 2, the second inclined plane 221 on the outer side surface of the wedge block 22 is disengaged from the first inclined plane 121 on the inner side surface of the first key strip 12 in the process of moving forwards, the first key strip 12 is sunk into the first key slot 11, the support for the inner wall of the paper tube is loosened, and the paper tube can be easily taken down from the shaft sleeve 1.
In addition, it should be noted that the names of the parts and the like of the embodiments described in the present specification may be different, and the equivalent or simple change of the structure, the characteristics and the principle described in the present patent idea is included in the protection scope of the present patent. Various modifications, additions and substitutions for the specific embodiments described may be made by those skilled in the art without departing from the scope of the invention as defined in the accompanying claims.
Claims (5)
1. A mechanical expansion shaft comprises a shaft sleeve, wherein a plurality of first key grooves are formed in the outer wall of the shaft sleeve, and a first key strip is arranged in each first key groove; the method is characterized in that: the screw rod is positioned in the shaft sleeve, and the front end and the rear end of the screw rod respectively extend out of the two ends of the shaft sleeve; the rotation limiting sleeve is sleeved on the screw rod and is fixedly arranged at the front end of the shaft sleeve; the nut limiting mechanism is arranged on the rotation limiting sleeve, the adjusting nut is arranged on the nut limiting mechanism, and the front section of the screw rod is positioned in a screw hole of the adjusting nut; the thickness of each first keybar is gradually increased from front to back, and a first inclined plane is arranged on the inner side face of each first keybar; be equipped with a plurality of wedges on the lead screw, the quantity of wedge is the same and the one-to-one with the quantity of first keybar, and the thickness of each wedge all reduces from preceding to back gradually, and the lateral surface of wedge is equipped with the second inclined plane with first inclined plane complex, second inclined plane and first inclined plane contact cooperation.
2. The mechanical expander shaft of claim 1, wherein: the limiting and rotating structure is arranged between the limiting and rotating sleeve and the screw rod and can limit the rotation of the screw rod, the limiting and rotating structure comprises a second key groove formed in the inner side wall of the limiting and rotating sleeve and a second key strip arranged on the screw rod, the second key groove extends along the axial direction of the limiting and rotating sleeve, the second key strip is fixedly arranged on the front section of the screw rod through a screw, and the second key strip is located in the second key groove.
3. The mechanical expander shaft of claim 1, wherein: the nut limiting mechanism comprises a positioning sleeve and an adjusting sleeve, the rear end of the positioning sleeve is installed on the rotation limiting sleeve, the inner cavity of the positioning sleeve is communicated with the inner cavity of the shaft sleeve, the front section of the lead screw is located in the positioning sleeve, the adjusting sleeve is rotatably installed at the front end of the positioning sleeve, and the adjusting nut is located in the adjusting sleeve and the outer ring of the adjusting nut is fixedly connected with the inner side wall of the adjusting sleeve.
4. A mechanical expansion shaft according to claim 3, wherein: the front end of the locating sleeve is provided with an annular groove, the rear end of the adjusting sleeve is provided with a clamping ring, and the clamping ring is located in the annular groove.
5. A mechanical expansion shaft according to claim 3, wherein: the nut limiting mechanism further comprises a handle, and the handle is fixedly connected with the front end of the rotation limiting sleeve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010551836.6A CN111703979A (en) | 2020-06-17 | 2020-06-17 | Mechanical expansion shaft |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010551836.6A CN111703979A (en) | 2020-06-17 | 2020-06-17 | Mechanical expansion shaft |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111703979A true CN111703979A (en) | 2020-09-25 |
Family
ID=72540777
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010551836.6A Pending CN111703979A (en) | 2020-06-17 | 2020-06-17 | Mechanical expansion shaft |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111703979A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114634065A (en) * | 2022-04-01 | 2022-06-17 | 威海光威精密机械有限公司 | Automatic expansion method for paper tube |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4079896A (en) * | 1976-11-18 | 1978-03-21 | The Appleton Machine Company | Expandable chuck for winding web material on a core |
| DE4335259A1 (en) * | 1993-10-15 | 1995-04-20 | Hans Dr Ing Grimm | Clamping device for at least one winding tube or the like to be fixed on a shank |
| CN1225597A (en) * | 1996-05-24 | 1999-08-11 | Sms舒路曼-斯玛公司 | Direct-drive coiller |
| CN2561752Y (en) * | 2002-07-12 | 2003-07-23 | 安维凯 | Expended spindle |
| CN203754147U (en) * | 2013-12-23 | 2014-08-06 | 深圳市星源材质科技股份有限公司 | Mechanical chuck |
| CN205820781U (en) * | 2016-06-20 | 2016-12-21 | 中国商用飞机有限责任公司 | A kind of screw jack |
-
2020
- 2020-06-17 CN CN202010551836.6A patent/CN111703979A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4079896A (en) * | 1976-11-18 | 1978-03-21 | The Appleton Machine Company | Expandable chuck for winding web material on a core |
| DE4335259A1 (en) * | 1993-10-15 | 1995-04-20 | Hans Dr Ing Grimm | Clamping device for at least one winding tube or the like to be fixed on a shank |
| CN1225597A (en) * | 1996-05-24 | 1999-08-11 | Sms舒路曼-斯玛公司 | Direct-drive coiller |
| CN2561752Y (en) * | 2002-07-12 | 2003-07-23 | 安维凯 | Expended spindle |
| CN203754147U (en) * | 2013-12-23 | 2014-08-06 | 深圳市星源材质科技股份有限公司 | Mechanical chuck |
| CN205820781U (en) * | 2016-06-20 | 2016-12-21 | 中国商用飞机有限责任公司 | A kind of screw jack |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114634065A (en) * | 2022-04-01 | 2022-06-17 | 威海光威精密机械有限公司 | Automatic expansion method for paper tube |
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| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20200925 |
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| RJ01 | Rejection of invention patent application after publication |