CN112589494A - Sleeve type collet central frame structure - Google Patents
Sleeve type collet central frame structure Download PDFInfo
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- CN112589494A CN112589494A CN202011497468.8A CN202011497468A CN112589494A CN 112589494 A CN112589494 A CN 112589494A CN 202011497468 A CN202011497468 A CN 202011497468A CN 112589494 A CN112589494 A CN 112589494A
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- China
- Prior art keywords
- collet chuck
- hydraulic cylinder
- upper body
- transmission mechanism
- pull sleeve
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q3/00—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine
- B23Q3/02—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine for mounting on a work-table, tool-slide, or analogous part
- B23Q3/06—Work-clamping means
- B23Q3/062—Work-clamping means adapted for holding workpieces having a special form or being made from a special material
- B23Q3/065—Work-clamping means adapted for holding workpieces having a special form or being made from a special material for holding workpieces being specially deformable, e.g. made from thin-walled or elastic material
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Gripping On Spindles (AREA)
Abstract
The invention discloses a telescopic collet chuck center frame structure which comprises a bottom plate, an upper body, a power device, a transmission mechanism and a clamping device, wherein the upper body is arranged on the bottom plate, the power device is arranged at the top of the upper body, the transmission mechanism is connected with the output end of the power device, the driving end of the transmission mechanism is connected with the clamping device, the power device controls the transmission mechanism, and the transmission mechanism controls the clamping or loosening action of the clamping device. The clamping of the workpiece is realized through the matching of the power device, the transmission mechanism and the clamping device, the workpiece can be prevented from being damaged due to the clamping form of tightly holding the elastic collet chuck and the workpiece, the problem that the large-diameter and long thin-wall part is difficult to process is well solved, the clamping force is balanced, the workpiece cannot be damaged, the operation is simple, and the processing precision is improved.
Description
Technical Field
The invention relates to a clamping mechanism, in particular to a telescopic collet central frame structure.
Background
At present, a conventional central frame is often adopted to assist clamping when processing parts with large diameters and long pipes, but when the parts with large diameters and long thin walls are processed, the outer diameters of the parts clamped by the conventional central frame are in line contact, the width of the parts is only the width of a bearing, the thin-wall workpiece is easily clamped and deformed, and the processing precision of the parts cannot be guaranteed.
Disclosure of Invention
The invention aims to provide a telescopic collet central frame structure which is compact in structure, strong in available space, simple and reliable, suitable for machining large-diameter and long thin-wall parts, balanced in clamping force and capable of preventing workpieces from clamping and deforming.
The technical scheme adopted by the invention for solving the technical problems is as follows: the structure of the telescopic collet chuck center frame comprises a bottom plate, an upper body, a power device, a transmission mechanism and a clamping device, wherein the upper body is arranged on the bottom plate, the power device is arranged at the top of the upper body, the transmission mechanism is connected with the output end of the power device, the driving end of the transmission mechanism is connected with the clamping device, the power device controls the transmission mechanism, and the transmission mechanism controls the clamping or loosening action of the clamping device.
Further, the clamping device comprises a collet housing, a deep groove ball bearing, a spacer, a terminal bearing, an elastic collet, an adjusting nut, an inner pull sleeve, an outer pull sleeve and a round nut, the deep groove ball bearing is mounted in an upper body inner cavity, the elastic collet is movably sleeved with the collet housing, the outer wall of the collet housing is sleeved with the terminal bearing, the spacer and a shaft elastic check ring are arranged between the terminal bearing and the deep groove ball bearing, the inner end of the elastic collet is matched with the inner wall of the collet housing in a conical surface mode, the outer end of the elastic collet is provided with the inner pull sleeve and the outer pull sleeve, the inner pull sleeve is sleeved with the elastic collet housing, the terminal bearing is arranged in the outer pull sleeve and sleeved with the inner pull sleeve, the adjusting nut for adjusting the gap between the outer pull sleeve and the inner pull sleeve is mounted on the outer wall of the inner pull sleeve, the inner pull sleeve is fixed on the elastic collet housing through the.
Furthermore, a sealing ring with a dustproof sealing function and an O-shaped ring with a sealing and lubricating function are arranged on the collet sleeve.
Further, power device includes coupling, pneumatic cylinder left side lid, hydraulic cylinder body, pneumatic cylinder right side lid and piston rod, the upper end of the upper part of the body is located to the hydraulic cylinder body, and one side of hydraulic cylinder body is equipped with the pneumatic cylinder left side lid, and it is equipped with the pneumatic cylinder right side lid to correspond the opposite side, the one end of piston rod is passed the pneumatic cylinder right side lid and is extended to the hydraulic cylinder body inner chamber, and the free end of piston rod is equipped with the pivot of being connected with drive mechanism, pneumatic cylinder left side lid and pneumatic cylinder right side lid are equipped with the coupling that lets in hydraulic oil toward.
Furthermore, drive mechanism includes back shaft and shifting fork, the one end of shifting fork is articulated with power device's piston rod, and the other end is articulated with clamping device's outer cover that draws, the one end and the upper part of the body lateral wall of back shaft link firmly, and the other end and the shifting fork of back shaft rotate to be connected.
Further, the deep groove ball bearing is provided with two.
Furthermore, an elastic retainer ring for a shaft is arranged between the terminal bearing and the spacer bush.
Furthermore, the left side of the upper body is provided with an upper body left cover for fixing the deep groove ball bearing, and the side wall of the upper body is provided with a lubricating pipe joint communicated with the inner cavity of the upper body.
The invention has the beneficial effects that:
1. the invention realizes the clamping of the workpiece through the matching of the power device, the transmission mechanism and the clamping device, can prevent the workpiece from being damaged because the elastic collet chuck and the workpiece adopt a tightly-holding clamping mode, well solves the problem of difficulty in processing large-diameter and long thin-wall parts, has balanced clamping force, can not damage the workpiece, has simple operation and improves the processing precision.
2. Because the collet sleeve is matched with the stress end of the elastic collet chuck by adopting the conical surface, the elastic collet chuck is gradually extruded by the conical surface on the inner wall of the collet chuck sleeve, and the balance of the clamping force of the elastic collet chuck is ensured.
Drawings
FIG. 1 is a schematic structural view of the present invention;
fig. 2 is a sectional view a-a.
In the figure:
1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20 shaft elastic check ring, 21, 22, 23, 24, 25, 26, 27, 28, 29 ring nut, 29 groove.
Detailed Description
The structure of the telescopic collet center frame of the present invention will be described in detail below with reference to the accompanying drawings.
As shown in fig. 1 and 2, the central frame structure of the telescopic collet chuck of the invention is a clamping mechanism concentric with a numerically controlled lathe, and the structure comprises a bottom plate 1, an upper body 2, a power device, a transmission mechanism and a clamping device, wherein the bottom plate 1 is provided with the upper body 2, the clamping part of the clamping device is arranged inside the upper body, the top of the upper body is provided with the power device, the transmission mechanism is connected with the output end of the power device, the driving end of the transmission mechanism is connected with the clamping device, the power device controls the transmission mechanism, and the transmission mechanism controls the clamping or loosening action of the clamping device, so as to clamp a workpiece.
As shown in fig. 2, the clamping device comprises a collet housing 17, a deep groove ball bearing 18, a spacer 19, a terminal bearing 22, an elastic collet chuck 24, an adjusting nut 25, an inner pull sleeve 26, an outer pull sleeve 27 and a round nut 28, wherein the deep groove ball bearing 18 is mounted in an inner cavity of the upper body 2, the elastic collet chuck 24 is movably sleeved with the collet housing 17, the elastic collet chuck 24 is matched with a workpiece to realize clamping, the deep groove ball bearing 18 and the terminal bearing 22 are sleeved on the outer wall of the collet housing, and the elastic collet chuck is matched with the collet housing to realize rotation in the upper body through the bearing, so that the workpiece can be rotatably processed after being clamped. A spacer bush and an elastic retainer ring for a shaft are arranged between the terminal bearing and the deep groove ball bearing, and the functions of blocking and fixing the terminal bearing are achieved. In order to improve the stability of the rotation of the collet sleeve, two deep groove ball bearings can be arranged. The inner end of the elastic collet chuck is matched with the inner wall of the collet chuck outer sleeve in a conical surface mode, and the elastic collet chuck is clamped through the conical matching surface. The outer end of the elastic collet chuck is provided with an inner pulling sleeve and an outer pulling sleeve, the inner pulling sleeve and the elastic collet chuck are sleeved, the outer pulling sleeve and the inner pulling sleeve are sleeved, a terminal bearing is arranged in the outer pulling sleeve and the inner pulling sleeve, an adjusting nut 25 for adjusting the gap between the outer pulling sleeve and the outer pulling sleeve is arranged on the outer wall of the inner pulling sleeve, the inner pulling sleeve is fixed on the elastic collet chuck through a round nut, and the elastic collet chuck is provided with a breaking groove for realizing clamping force. When the clamping is realized, the elastic collet chuck moves rightwards under the driving of the outer pulling sleeve, and the left end of the elastic collet chuck is conical, so that the conical inner wall of the outer sleeve of the collet chuck generates extrusion force on the elastic collet chuck when the elastic collet chuck moves rightwards, and the broken groove on the elastic collet chuck is closed, thereby realizing the clamping effect on a workpiece.
And a first sealing ring 14 and a second sealing ring 23 which have the dustproof sealing function and an O-shaped ring 16 which has the sealing and lubricating function are arranged on the outer sleeve of the collet.
As shown in fig. 1, power device includes 3 couplings, 4 pneumatic cylinder left lids, 5 hydraulic cylinder bodies, 9 pneumatic cylinder right lids and 10 piston rods, the upper end of the upper body is located to hydraulic cylinder body, and one side of hydraulic cylinder body is equipped with the pneumatic cylinder left lid, corresponds the opposite side and is equipped with the pneumatic cylinder right lid, the one end of piston rod is passed the pneumatic cylinder right lid and is extended to the hydraulic cylinder body inner chamber, and the free end of piston rod is equipped with the pivot of being connected with drive mechanism, pneumatic cylinder left lid and pneumatic cylinder right lid are equipped with the coupling that lets in hydraulic oil toward the hydraulic cylinder body inner chamber respectively. The left cover and the right cover of the hydraulic cylinder are respectively sealed with the hydraulic cylinder body through a first O-shaped ring 6, a second O-shaped ring 7 and a third O-shaped ring 8. And injecting hydraulic oil into the inner cavity of the hydraulic cylinder body through pipe joints on the left cover and the right cover of the hydraulic cylinder, so as to control the movement of the piston rod.
The transmission mechanism comprises an 11-support shaft and a 12-shifting fork, one end of the shifting fork is hinged to a piston rod of the power device, the other end of the shifting fork is hinged to an outer pulling sleeve of the clamping device, one end of the support shaft is fixedly connected with the upper body side wall, and the other end of the support shaft is rotatably connected with the shifting fork. The shaft pin at the free end of the piston rod is matched and hinged with the pin hole at the end part of the shifting fork, the telescopic motion of the piston rod drives the shifting fork to swing, and the swing of the shifting fork drives the outer pulling sleeve and the elastic collet chuck of the clamping device to move left and right, so that the clamping and loosening actions of the elastic collet chuck are realized.
The left side of the upper body is provided with an upper body left cover for fixing the deep groove ball bearing, the inner side of the upper body left cover is provided with a fourth O-shaped sealing ring, a first sealing ring 4 is arranged between the upper body left cover and the collet sleeve, the side wall of the upper body is provided with a lubricating pipe joint 21 communicated with the inner cavity of the upper body, lubricating oil can be introduced through the pipe joint, and the collet sleeve 17 is guaranteed to rotate smoothly.
Hydraulic oil is introduced through the left side and the right side of the pipe joint 3 to drive the piston rod 10 to move axially. When hydraulic oil is introduced into the pipe joint on the right side of the hydraulic cylinder body 5 to drive the piston rod 10 to move leftwards, the piston rod drives the shifting fork 12 to swing while moving leftwards, and the outer pull sleeve 27 is driven to move axially rightwards through the support shaft 11 fixed on the upper body 2; the terminal bearing 22 pushes the inner pulling sleeve 26 to the right to drive the elastic collet chuck 24 to move to the right; the collet sleeve 17 is axially fixed with the upper body 2 through the deep groove ball bearing 18, the elastic collet 24 is stressed through the matched opposite position of the conical surface of the collet sleeve 17, the open groove is closed to radially clamp a workpiece when the elastic collet is stressed, and then the auxiliary machine tool rotates the part through the deep groove ball bearing 18 and the terminal bearing 22 to assist in processing large-diameter long and thin-walled parts.
When hydraulic oil is introduced to the left side of the hydraulic cylinder body 5 through a pipe joint on a left cover of the hydraulic cylinder, the hydraulic oil drives the piston rod 10 to move rightwards, the shifting fork 12 is driven, the outer pull sleeve 27 is driven to move leftwards through the support shaft 11 fixed on the upper body 2, the inner pull sleeve 26 is pulled leftwards through the adjusting nut 25, the inner pull sleeve 26 drives the elastic collet chuck 24 to be matched and disconnected with the conical surface of the collet chuck outer sleeve 17 leftwards, at the moment, the elastic collet chuck loses extrusion force, the disconnected groove recovers to the initial state, and a machining. The structure of the invention well solves the problem of difficulty in processing large-diameter and long thin-wall parts, and the clamping force is balanced, so that the workpiece is not damaged, and the operation is simple. And the processing precision is improved.
While the foregoing is directed to the principles of the present invention, other and further embodiments of the invention may be devised without departing from the basic scope thereof, and the scope thereof is determined by the claims that follow.
Other technical features than those described in the specification are known to those skilled in the art.
Claims (8)
1. The telescopic collet chuck center frame structure is characterized by comprising a bottom plate, an upper body, a power device, a transmission mechanism and a clamping device, wherein the upper body is arranged on the bottom plate, the power device is arranged at the top of the upper body, the transmission mechanism is connected with the output end of the power device, the driving end of the transmission mechanism is connected with the clamping device, the power device controls the transmission mechanism, and the transmission mechanism controls the clamping or loosening action of the clamping device.
2. The telescopic collet chuck center frame structure as claimed in claim 1, wherein the clamping device comprises a collet chuck housing, a deep groove ball bearing, a spacer, a terminal bearing, an elastic collet chuck, an adjusting nut, an inner pull sleeve, an outer pull sleeve and a round nut, the deep groove ball bearing is mounted in the upper body cavity, the elastic collet chuck is movably sleeved with the collet chuck housing, the outer wall of the collet chuck housing is sleeved with the terminal bearing and the deep groove ball bearing, the inner end of the elastic collet chuck is matched with the inner wall of the collet chuck housing in a conical surface manner, the outer end of the elastic collet chuck is provided with the inner pull sleeve and the outer pull sleeve, the inner pull sleeve is sleeved with the elastic collet chuck, the outer pull sleeve and the inner pull sleeve are sleeved with the terminal bearing, the adjusting nut for adjusting the gap between the inner pull sleeve and the outer pull sleeve is mounted on the outer wall of the inner pull sleeve, the inner pull sleeve is fixed on the elastic collet chuck through, and a breaking groove for realizing clamping force is arranged on the elastic collet chuck.
3. The telescopic collet center frame structure of claim 2, wherein said collet housing has a seal ring for dust sealing and an O-ring for seal lubrication.
4. The telescopic collet chuck center frame structure as claimed in claim 1, wherein the power device comprises a pipe joint, a left hydraulic cylinder cover, a left hydraulic cylinder body, a right hydraulic cylinder cover and a piston rod, the hydraulic cylinder body is arranged at the upper end of the upper body, the left hydraulic cylinder cover is arranged at one side of the hydraulic cylinder body, the right hydraulic cylinder cover is arranged at the corresponding other side of the hydraulic cylinder body, one end of the piston rod passes through the right hydraulic cylinder cover and extends to the inner cavity of the hydraulic cylinder body, a shaft pin connected with the transmission mechanism is arranged at the free end of the piston rod, and the left hydraulic cylinder cover and the right hydraulic cylinder cover are respectively provided with a pipe.
5. The telescopic collet center frame structure of claim 1, wherein said transmission mechanism includes a support shaft and a shift fork, one end of said shift fork is hinged to a piston rod of the power unit, the other end of said shift fork is hinged to the outer pull sleeve of the clamping unit, one end of said support shaft is fixedly connected to the upper body side wall, and the other end of said support shaft is rotatably connected to the shift fork.
6. The telescopic collet center frame structure of claim 2, wherein there are two deep groove ball bearings.
7. The telescopic collet center frame structure of claim 2, wherein a shaft circlip is further provided between the terminal bearing and the spacer.
8. The telescopic collet center frame structure of claim 1, wherein the left side of the upper body is provided with an upper body left cover for fixing the deep groove ball bearing, and the side wall of the upper body is provided with a lubricating pipe joint communicated with the inner cavity of the upper body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011497468.8A CN112589494A (en) | 2020-12-17 | 2020-12-17 | Sleeve type collet central frame structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011497468.8A CN112589494A (en) | 2020-12-17 | 2020-12-17 | Sleeve type collet central frame structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112589494A true CN112589494A (en) | 2021-04-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011497468.8A Pending CN112589494A (en) | 2020-12-17 | 2020-12-17 | Sleeve type collet central frame structure |
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| Country | Link |
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| CN (1) | CN112589494A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115430857A (en) * | 2022-11-07 | 2022-12-06 | 成都航利航空科技有限责任公司 | Precise deep hole machining device and method for fuel nozzle shell of aircraft engine |
-
2020
- 2020-12-17 CN CN202011497468.8A patent/CN112589494A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115430857A (en) * | 2022-11-07 | 2022-12-06 | 成都航利航空科技有限责任公司 | Precise deep hole machining device and method for fuel nozzle shell of aircraft engine |
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