CN109333041B - Single-thrust two-stage positioning elastic expansion telescopic mechanism - Google Patents
Single-thrust two-stage positioning elastic expansion telescopic mechanism Download PDFInfo
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- CN109333041B CN109333041B CN201811478186.6A CN201811478186A CN109333041B CN 109333041 B CN109333041 B CN 109333041B CN 201811478186 A CN201811478186 A CN 201811478186A CN 109333041 B CN109333041 B CN 109333041B
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- 230000007246 mechanism Effects 0.000 title claims abstract description 57
- 238000000034 method Methods 0.000 claims description 5
- 230000008602 contraction Effects 0.000 claims description 4
- 230000009471 action Effects 0.000 description 4
- 238000009434 installation Methods 0.000 description 4
- 238000003466 welding Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P19/00—Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformation; Tools or devices therefor so far as not provided for in other classes
- B23P19/02—Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformation; Tools or devices therefor so far as not provided for in other classes for connecting objects by press fit or for detaching same
- B23P19/027—Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformation; Tools or devices therefor so far as not provided for in other classes for connecting objects by press fit or for detaching same using hydraulic or pneumatic means
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- Engineering & Computer Science (AREA)
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Abstract
The invention discloses a single-thrust two-stage positioning elastic expansion telescopic mechanism, which comprises a driving mechanism, a guide sleeve, a first-stage telescopic shaft, a second-stage telescopic shaft, a thimble, an elastic expansion sleeve and a cylindrical end set screw, wherein the guide sleeve is arranged on the first-stage telescopic shaft; the guide sleeve, the first-stage telescopic shaft and the second-stage telescopic shaft are sleeved in sequence from outside to inside; the front end of the first-stage telescopic shaft is connected with the rear end of the elastic expansion sleeve; the front end of the second-stage telescopic shaft is connected with the rear end of the thimble; the ejector pin is sleeved in the elastic expansion sleeve; the rear end of the second-stage telescopic shaft is connected with the driving mechanism; the outer surface of the thimble is provided with a waist-shaped groove; the cylindrical end set screw is formed by connecting a threaded end and a cylindrical end, and the threaded end of the cylindrical end set screw is connected with the elastic expansion sleeve; the cylindrical end of the cylindrical end set screw is inserted into the waist-shaped groove. The invention has flexible structural design, compact structure and convenient demoulding.
Description
Technical Field
The invention relates to the technical field of engineering machinery, in particular to a single-thrust two-stage positioning elastic expansion and contraction mechanism.
Background
In the mechanical production process, many parts require pre-weld machining of bores with high coaxiality requirements. In order to prevent the coaxiality of the inner hole from being influenced by deformation, damage and the like of the machined inner hole in the subsequent welding process of the part, the machined inner hole is penetrated into the machined inner hole of the part through the inner hole positioning mechanism or the mandrel so as to ensure that the coaxiality precision of the inner hole is not influenced after the welding, but the inner hole is contracted due to the fact that the part is heated after the welding is finished, so that the inner hole positioning mechanism or the mandrel is difficult to detach from the part, namely, the demolding is difficult, and the machined inner hole is easy to deform, damage and the like to influence the coaxiality if the machined inner hole is forcibly demolded.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides the single-thrust two-stage positioning elastic expansion and contraction mechanism which is flexible in structural design, compact in structure and convenient to demold.
In order to achieve the aim, the invention provides a single-thrust two-stage positioning elastic expansion telescopic mechanism, which comprises a driving mechanism, a guide sleeve, a first-stage telescopic shaft, a second-stage telescopic shaft, a thimble, an elastic expansion sleeve and a cylindrical end set screw, wherein the driving mechanism is arranged on the guide sleeve; the guide sleeve, the first-stage telescopic shaft and the second-stage telescopic shaft are sleeved in sequence from outside to inside; the front end of the first-stage telescopic shaft is connected with the rear end of the elastic expansion sleeve; the front end of the second-stage telescopic shaft is connected with the rear end of the thimble; the ejector pin is sleeved in the elastic expansion sleeve; the rear end of the first-stage telescopic shaft extends out of the rear end of the guide sleeve; the rear end of the first-stage telescopic shaft is provided with a first positioning shaft shoulder, and the outer diameter of the first positioning shaft shoulder is larger than the inner diameter of the inner hole of the guide sleeve; the rear end of the second-stage telescopic shaft extends out of the rear end of the first-stage telescopic shaft; the rear end of the second-stage telescopic shaft is provided with a second positioning shaft shoulder, and the outer diameter of the second positioning shaft shoulder is larger than the inner diameter of the inner hole of the first-stage telescopic shaft;
The rear end of the second-stage telescopic shaft is connected with the driving mechanism; the outer surface of the thimble is provided with a waist-shaped groove; the cylindrical end set screw is formed by connecting a threaded end and a cylindrical end, and the threaded end of the cylindrical end set screw is connected with the elastic expansion sleeve; the cylindrical end of the cylindrical end set screw is inserted into the waist-shaped groove; the length of the waist-shaped groove is larger than the diameter of the cylindrical end set screw; the front end of the thimble is in a conical structure; an inner conical surface matched with the thimble conical structure is arranged at the front end of the elastic expansion sleeve; the front end of the elastic expansion sleeve is uniformly provided with a plurality of openings along the circumference.
Further, the rear end of the guide sleeve is provided with a flange, and a plurality of bolt holes are uniformly formed in the flange along the circumference.
Further, a third positioning shaft shoulder is arranged on the outer surface of the middle of the elastic expansion sleeve; the opening extends from the front end face of the elastic expansion sleeve to the third positioning shaft shoulder; the front end of the first-stage telescopic shaft is provided with a first inner spigot; the outer surface of the front end of the first-stage telescopic shaft is uniformly provided with a plurality of first threaded through holes along the circumference; conical holes which are opposite to the first threaded through holes in position and have the same number are formed at the rear end of the elastic expansion sleeve; the rear end of the elastic expansion sleeve is inserted into a first inner spigot of the first-stage telescopic shaft and is axially positioned through the third positioning shaft shoulder; the threaded end of the conical end set screw is in threaded connection with the first threaded through hole of the first-stage telescopic shaft, and the conical end of the conical end set screw is inserted into the conical hole of the elastic expansion sleeve; the third positioning shaft shoulder is provided with a second threaded through hole; and the threaded end of the cylindrical end set screw is connected with the second threaded through hole of the third positioning shaft shoulder.
Further, the front end of the second-stage telescopic shaft is sequentially provided with a second inner spigot and an inner threaded hole from outside to inside; the rear end of the thimble is provided with an outer shaft shoulder and an outer thread section which are respectively matched with the second inner spigot and the inner thread hole.
Further, the thread end of the cylindrical end set screw is provided with an inner hexagonal groove; the thread end of the conical end set screw is provided with an inner hexagonal groove.
Further, a third inner spigot is arranged at the rear end of the first-stage telescopic shaft; the second positioning shaft shoulder is positioned in the third inner spigot.
Further, the driving mechanism is an air cylinder or an oil cylinder.
The invention also provides a working method of the single-thrust two-stage positioning elastic expansion telescopic mechanism, which comprises the following steps:
when the elastic expansion sleeve extends out, the driving mechanism pushes the second-stage telescopic shaft to move from the rear end to the front end, so that the ejector pin is pushed to move from the rear end to the front end, and the conical structure at the front end of the ejector pin is matched with the inner conical surface at the front end of the elastic expansion sleeve; the driving mechanism continues to push, and the second-stage telescopic shaft, the ejector pin, the first-stage telescopic shaft and the elastic expansion sleeve integrally move relative to the guide sleeve; when the first-stage telescopic shaft is axially limited by the guide sleeve, the first-stage telescopic shaft and the elastic expansion sleeve do not move relative to the guide sleeve, the second-stage telescopic shaft and the ejector pin continue to move relative to the guide sleeve until the conical structure of the ejector pin penetrates out of the front end of the elastic expansion sleeve, so that the front end of the elastic expansion sleeve is expanded by the ejector pin, and the rear driving mechanism stops pushing;
When the telescopic shaft is retracted, the driving mechanism drives the second-stage telescopic shaft to move from the front end to the rear end, so that the thimble moves from the front end to the rear end, and when the thimble moves to the cylindrical end of the cylindrical end fastening screw, the first-stage telescopic shaft, the thimble, the second-stage telescopic shaft and the elastic expansion sleeve integrally move relative to the guide sleeve.
The invention has the beneficial effects that: under the action of a single driving force, the invention not only realizes the function of positioning and expanding the inner hole, but also rapidly realizes the demolding function, greatly improves the working efficiency, and simultaneously ensures the accuracy requirement of the coaxiality of the inner hole. Meanwhile, the invention has compact structure and small occupied space, so that the invention is also suitable for occasions with small installation space.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a perspective view of the present invention showing the configuration of the tapered surface of the ejector pin in cooperation with the inner tapered surface of the elastomeric expansion shell.
Fig. 2 is a front view of fig. 1.
Fig. 3 is a cross-sectional view A-A of fig. 2.
Fig. 4 is a perspective view of the elastic expansion sleeve of the present invention when expanded.
Fig. 5 is a partial schematic view of fig. 3.
Detailed Description
The invention is further described below with reference to the drawings, but is not intended to limit the scope of the invention.
As shown in fig. 1-5, the single-thrust two-stage positioning elastic expansion telescopic mechanism provided by the embodiment comprises a driving mechanism (not shown in the figure), a guide sleeve 1, a first-stage telescopic shaft 2, a second-stage telescopic shaft 7, a thimble 4, an elastic expansion sleeve 3 and a cylindrical end set screw 5; the guide sleeve 1, the first-stage telescopic shaft 2 and the second-stage telescopic shaft 7 are sleeved in sequence from outside to inside; the front end of the first-stage telescopic shaft 2 is connected with the rear end of the elastic expansion sleeve 3; the front end of the second-stage telescopic shaft 7 is connected with the rear end of the thimble 4; the thimble 4 is sleeved in the elastic expansion sleeve 3; the rear end of the first-stage telescopic shaft 2 extends out of the rear end of the guide sleeve 1; the rear end of the first-stage telescopic shaft 2 is provided with a first positioning shaft shoulder 20, and the outer diameter of the first positioning shaft shoulder 20 is larger than the inner diameter of the inner hole of the guide sleeve 1; the rear end of the second-stage telescopic shaft 7 extends out of the rear end of the first-stage telescopic shaft 2; the rear end of the second-stage telescopic shaft 7 is provided with a second positioning shaft shoulder 70, and the outer diameter of the second positioning shaft shoulder 70 is larger than the inner diameter of the inner hole of the first-stage telescopic shaft 2.
The rear end of the second-stage telescopic shaft 7 is connected with the driving mechanism; the outer surface of the thimble 4 is provided with a waist-shaped groove 401; the cylindrical end set screw 5 is formed by connecting a threaded end and a cylindrical end, and the threaded end of the cylindrical end set screw 5 is connected with the elastic expansion sleeve 3; the cylindrical end of the cylindrical end set screw 5 is inserted into the waist-shaped groove 401; the length of the waist-shaped groove 401 is larger than the diameter of the cylindrical end set screw 5; the front end of the thimble 4 is in a conical structure; the front end of the elastic expansion sleeve 3 is provided with an inner conical surface matched with the conical structure of the thimble 4; the front end of the elastic expansion sleeve 3 is uniformly provided with a plurality of openings 301 along the circumference. In this embodiment, two waist-shaped grooves 401 are symmetrically formed on the outer surface of the thimble 4.
In this embodiment, a third positioning shoulder 30 is disposed on the outer surface of the middle of the elastic expansion sleeve 3; the opening 301 extends from the front end surface of the elastic expansion sleeve 3 to the third positioning shaft shoulder 30; the front end of the first-stage telescopic shaft 2 is provided with a first inner spigot; the outer surface of the front end of the first-stage telescopic shaft 2 is uniformly provided with a plurality of first threaded through holes along the circumference; conical holes which are opposite to the first threaded through holes in position and have the same number are arranged at the rear end of the elastic expansion sleeve 3; the rear end of the elastic expansion sleeve 3 is inserted into the first inner spigot of the first-stage telescopic shaft 2 and is axially positioned by the third positioning shaft shoulder 30; the threaded end of the conical end set screw 6 is in threaded connection with the first threaded through hole of the first-stage telescopic shaft 2, and the conical end of the conical end set screw 6 is inserted into the conical hole of the elastic expansion sleeve 3; the third positioning shaft shoulder 30 is provided with a second threaded through hole; the threaded end of the cylindrical end set screw 5 is connected with the second threaded through hole of the third positioning shaft shoulder 30. In this embodiment, the outer diameter of the third positioning shaft shoulder 30 is smaller than the outer diameter of the first-stage telescopic shaft 2, under the action of the first inner spigot of the first-stage telescopic shaft 2 and the third positioning shaft shoulder 30, circumferential positioning and axial limiting of the elastic expansion sleeve 3 and the first-stage telescopic shaft 2 are achieved, and meanwhile, under the action of the conical end set screw 6, axial movement and circumferential rotation of the elastic expansion sleeve 3 relative to the first-stage telescopic shaft 2 are limited, and integral connection of the elastic expansion sleeve 3 and the first-stage telescopic shaft 2 is achieved.
In this embodiment, the front end of the second-stage telescopic shaft 7 is sequentially provided with a second inner spigot and an inner threaded hole from outside to inside; the rear end of the thimble 4 is provided with an outer shaft shoulder and an outer thread section which are respectively matched with the second inner spigot and the inner thread hole, so that the rigid connection between the second-stage telescopic shaft 7 and the thimble 4 is realized, and the assembly and the disassembly are convenient.
In this embodiment, the threaded end of the cylindrical end fastening screw 5 is provided with an inner hexagonal groove; the screw thread end of the conical end set screw 6 is provided with an inner hexagonal groove, so that the cylindrical end set screw 5 and the conical end set screw 6 can be conveniently assembled and disassembled through an inner hexagonal wrench, and the assembly and the disassembly are quite convenient.
In this embodiment, a third inner spigot is provided at the rear end of the first-stage telescopic shaft 2; the second locating shoulder 70 is located within the third female end.
In this embodiment, the driving mechanism may be an air cylinder or an oil cylinder, and may be other linear driving mechanisms, which is not limited in particular, and is not the focus of this embodiment, so redundant description is omitted. The other end of the second-stage telescopic shaft 7 is provided with an inner blind hole for being installed with a driving mechanism.
When the telescopic mechanism of the embodiment is used, the guide sleeve 1 is arranged on corresponding equipment, the guide sleeve 1 is ensured to be fixed, and the elastic sleeve 3 is aligned with an inner hole of a part which is processed. Specifically, in this embodiment, the rear end of the guide sleeve 1 is provided with a flange 10, and the flange 10 is uniformly provided with a plurality of bolt holes 101 along the circumference, that is, the flange 10 is locked with corresponding equipment for disassembly and installation.
The invention also provides a working method of the single-thrust two-stage positioning elastic expansion telescopic mechanism, which comprises the following steps:
When the telescopic mechanism of the embodiment stretches out, the driving mechanism pushes the second-stage telescopic shaft 7 to move from the rear end to the front end, so that the thimble 4 is pushed to move from the rear end to the front end, and the conical structure at the front end of the thimble 4 is matched with the inner conical surface at the front end of the elastic expansion sleeve 3 (as shown in fig. 1-3); because the sliding friction force between the first-stage telescopic shaft 2 and the guide sleeve 1 is far smaller than the thrust of the ejector pin 4 expanding the elastic expansion sleeve 3, when the driving mechanism continues pushing, the second-stage telescopic shaft 7, the ejector pin 4, the first-stage telescopic shaft 2 and the elastic expansion sleeve 3 become a rigid body, namely the second-stage telescopic shaft 7, the ejector pin 4, the first-stage telescopic shaft 2 and the elastic expansion sleeve 3 integrally move relative to the guide sleeve 1 until the first-stage telescopic shaft 2 is axially limited by the guide sleeve 1, namely the first positioning shaft shoulder 20 of the first-stage telescopic shaft 2 is blocked by the rear end of the guide sleeve 1, and at the moment, the front end of the elastic expansion sleeve 3 penetrates into an inner hole processed by a part, so that the positioning of the telescopic mechanism and the part in the embodiment is realized; when the first-stage telescopic shaft 2 is axially limited by the guide sleeve 1, the driving mechanism continues to push, at this time, the first-stage telescopic shaft 2 and the elastic expansion sleeve 3 do not move relative to the guide sleeve 1, the second-stage telescopic shaft 7 and the thimble 4 continue to move relative to the guide sleeve 1 until the conical structure of the thimble 4 penetrates out of the front end of the elastic expansion sleeve 3, so that the front end of the elastic expansion sleeve 3 is expanded by the thimble 4 (as shown in fig. 4), the elastic expansion sleeve 3 expands the processed inner hole of the part, and the driving mechanism stops pushing, so that the reliable installation of the telescopic mechanism and the part in the embodiment is realized. In the extending process of the telescopic mechanism of the present embodiment, the cylindrical end of the cylindrical end set screw 5 moves in the waist-shaped groove 401 of the thimble 4, so as not to interfere the movement of the thimble 4, the elastic expansion sleeve 3, the first-stage telescopic shaft 2 and the second-stage telescopic shaft 7. When the first-stage telescopic shaft 2 is axially limited by the guide sleeve 1, the first-stage telescopic shaft 2 and the elastic expansion sleeve 3 do not move relative to the guide sleeve 1, and the second-stage telescopic shaft 7 has a distance for moving forwards relative to the first-stage telescopic shaft 2, namely a distance is reserved between the second positioning shaft shoulder 70 of the second-stage telescopic shaft 7 and the spigot surface of the third inner spigot of the first-stage telescopic shaft 2.
When the telescopic mechanism of the embodiment is retracted, the driving mechanism drives the second-stage telescopic shaft 7 to move from the front end to the rear end, so that the thimble 4 moves from the front end to the rear end, the thimble 4 is retracted into the elastic expansion sleeve 3, and at the moment, the elastic expansion sleeve 3 does not expand an inner hole of a part which is processed; the driving mechanism continues to drive the second-stage telescopic shaft 7 to move from the front end to the rear end, when the ejector pin 4 moves to the cylindrical end hooked by the cylindrical end set screw 5, the first-stage telescopic shaft 2, the ejector pin 4, the second-stage telescopic shaft 7 and the elastic expansion sleeve 3 integrally move relative to the guide sleeve 1, so that the elastic expansion sleeve 3 is separated from an inner hole machined by a part, the quick demoulding of the telescopic mechanism in the embodiment is realized, and the rear driving mechanism stops driving.
In the embodiment, under the action of the guide sleeve 1, the guide function of the telescopic mechanism of the embodiment is realized, and the movement precision is greatly improved. Under the single driving force effect of the driving mechanism, the inner hole positioning and expanding function is realized, the demolding function is also realized rapidly, the working efficiency is greatly improved, meanwhile, the accuracy requirement of the coaxiality of the inner hole is ensured, and the embodiment can be suitable for the working conditions with less driving force requirement and more positioning requirements. Meanwhile, the embodiment has compact structure and small occupied space, thereby being applicable to occasions with small installation space.
The foregoing has shown and described the basic principles, principal features and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present invention, and various changes and modifications may be made without departing from the spirit and scope of the invention, which is defined in the appended claims. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (8)
1. The single-thrust two-stage positioning elastic expansion telescopic mechanism is characterized by comprising a driving mechanism, a guide sleeve, a first-stage telescopic shaft, a second-stage telescopic shaft, a thimble, an elastic expansion sleeve and a cylindrical end set screw; the guide sleeve, the first-stage telescopic shaft and the second-stage telescopic shaft are sleeved in sequence from outside to inside; the front end of the first-stage telescopic shaft is connected with the rear end of the elastic expansion sleeve; the front end of the second-stage telescopic shaft is connected with the rear end of the thimble; the ejector pin is sleeved in the elastic expansion sleeve; the rear end of the first-stage telescopic shaft extends out of the rear end of the guide sleeve; the rear end of the first-stage telescopic shaft is provided with a first positioning shaft shoulder, and the outer diameter of the first positioning shaft shoulder is larger than the inner diameter of the inner hole of the guide sleeve; the rear end of the second-stage telescopic shaft extends out of the rear end of the first-stage telescopic shaft; the rear end of the second-stage telescopic shaft is provided with a second positioning shaft shoulder, and the outer diameter of the second positioning shaft shoulder is larger than the inner diameter of the inner hole of the first-stage telescopic shaft;
The rear end of the second-stage telescopic shaft is connected with the driving mechanism; the outer surface of the thimble is provided with a waist-shaped groove; the cylindrical end set screw is formed by connecting a threaded end and a cylindrical end, and the threaded end of the cylindrical end set screw is connected with the elastic expansion sleeve; the cylindrical end of the cylindrical end set screw is inserted into the waist-shaped groove; the length of the waist-shaped groove is larger than the diameter of the cylindrical end set screw; the front end of the thimble is in a conical structure; an inner conical surface matched with the thimble conical structure is arranged at the front end of the elastic expansion sleeve; the front end of the elastic expansion sleeve is uniformly provided with a plurality of openings along the circumference.
2. The single-thrust two-stage positioning elastic expansion telescopic mechanism according to claim 1, wherein a flange is arranged at the rear end of the guide sleeve, and a plurality of bolt holes are uniformly formed in the flange along the circumference.
3. The single-thrust two-stage positioning elastic expansion mechanism according to claim 1, wherein a third positioning shaft shoulder is arranged on the outer surface of the middle of the elastic expansion sleeve; the opening extends from the front end face of the elastic expansion sleeve to the third positioning shaft shoulder; the front end of the first-stage telescopic shaft is provided with a first inner spigot; the outer surface of the front end of the first-stage telescopic shaft is uniformly provided with a plurality of first threaded through holes along the circumference; conical holes which are opposite to the first threaded through holes in position and have the same number are formed at the rear end of the elastic expansion sleeve; the rear end of the elastic expansion sleeve is inserted into a first inner spigot of the first-stage telescopic shaft and is axially positioned through the third positioning shaft shoulder; the threaded end of the conical end set screw is in threaded connection with the first threaded through hole of the first-stage telescopic shaft, and the conical end of the conical end set screw is inserted into the conical hole of the elastic expansion sleeve; the third positioning shaft shoulder is provided with a second threaded through hole; and the threaded end of the cylindrical end set screw is connected with the second threaded through hole of the third positioning shaft shoulder.
4. The single-thrust two-stage positioning elastic expansion telescopic mechanism according to claim 1, wherein the front end of the second-stage telescopic shaft is sequentially provided with a second inner spigot and an inner threaded hole from outside to inside; the rear end of the thimble is provided with an outer shaft shoulder and an outer thread section which are respectively matched with the second inner spigot and the inner thread hole.
5. A single-thrust two-stage positioning elastic expansion and contraction mechanism according to claim 3, wherein the threaded end of the cylindrical end set screw is provided with an inner hexagonal groove; the thread end of the conical end set screw is provided with an inner hexagonal groove.
6. The single-thrust two-stage positioning elastic expansion telescopic mechanism according to claim 1, wherein a third inner spigot is arranged at the rear end of the first-stage telescopic shaft; the second positioning shaft shoulder is positioned in the third inner spigot.
7. The single-thrust two-stage positioning elastic expansion and contraction mechanism according to claim 1, wherein the driving mechanism is a cylinder or an oil cylinder.
8. A method of operating a single thrust two stage positioning spring loaded telescoping mechanism as claimed in any one of claims 1 to 7, comprising the steps of:
when the elastic expansion sleeve extends out, the driving mechanism pushes the second-stage telescopic shaft to move from the rear end to the front end, so that the ejector pin is pushed to move from the rear end to the front end, and the conical structure at the front end of the ejector pin is matched with the inner conical surface at the front end of the elastic expansion sleeve; the driving mechanism continues to push, and the second-stage telescopic shaft, the ejector pin, the first-stage telescopic shaft and the elastic expansion sleeve integrally move relative to the guide sleeve; when the first-stage telescopic shaft is axially limited by the guide sleeve, the first-stage telescopic shaft and the elastic expansion sleeve do not move relative to the guide sleeve, the second-stage telescopic shaft and the ejector pin continue to move relative to the guide sleeve until the conical structure of the ejector pin penetrates out of the front end of the elastic expansion sleeve, so that the front end of the elastic expansion sleeve is expanded by the ejector pin, and the rear driving mechanism stops pushing;
When the telescopic shaft is retracted, the driving mechanism drives the second-stage telescopic shaft to move from the front end to the rear end, so that the thimble moves from the front end to the rear end, and when the thimble moves to the cylindrical end of the cylindrical end fastening screw, the first-stage telescopic shaft, the thimble, the second-stage telescopic shaft and the elastic expansion sleeve integrally move relative to the guide sleeve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811478186.6A CN109333041B (en) | 2018-12-05 | 2018-12-05 | Single-thrust two-stage positioning elastic expansion telescopic mechanism |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811478186.6A CN109333041B (en) | 2018-12-05 | 2018-12-05 | Single-thrust two-stage positioning elastic expansion telescopic mechanism |
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| Publication Number | Publication Date |
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| CN109333041A CN109333041A (en) | 2019-02-15 |
| CN109333041B true CN109333041B (en) | 2024-07-16 |
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| CN201811478186.6A Active CN109333041B (en) | 2018-12-05 | 2018-12-05 | Single-thrust two-stage positioning elastic expansion telescopic mechanism |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109773450A (en) * | 2019-03-13 | 2019-05-21 | 上海新松机器人有限公司 | Expandable guide telescopic assembly machine |
| CN110961855B (en) * | 2019-11-26 | 2024-12-03 | 湖南杰希重工有限公司 | Axial positioning mechanism for welding pipe parts |
| CN115106979B (en) * | 2022-06-27 | 2024-04-05 | 山西柴油机工业有限责任公司 | Long interval Kong Cazhuang bushing device |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN209239434U (en) * | 2018-12-05 | 2019-08-13 | 湖南杰希重工有限公司 | A kind of list thrust dual-positioning elasticity swelling telescoping mechanism |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN201446423U (en) * | 2009-05-19 | 2010-05-05 | 南京数控机床有限公司 | Inner hole clamping tool for lathe |
| CN104819217B (en) * | 2015-05-20 | 2018-04-06 | 河北工业大学 | A kind of mechanical expansion shaft |
| CN204673000U (en) * | 2015-05-30 | 2015-09-30 | 广西玉柴机器股份有限公司 | A kind of self-locking expansion set |
| CN206216195U (en) * | 2016-08-27 | 2017-06-06 | 宁波宏大电梯有限公司 | For clamp workpiece and drive workpiece rotate mechanism |
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN209239434U (en) * | 2018-12-05 | 2019-08-13 | 湖南杰希重工有限公司 | A kind of list thrust dual-positioning elasticity swelling telescoping mechanism |
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