CN210702642U - Expansion sleeve structure capable of being locked in two directions - Google Patents
Expansion sleeve structure capable of being locked in two directions Download PDFInfo
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- CN210702642U CN210702642U CN201921022966.XU CN201921022966U CN210702642U CN 210702642 U CN210702642 U CN 210702642U CN 201921022966 U CN201921022966 U CN 201921022966U CN 210702642 U CN210702642 U CN 210702642U
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Abstract
The utility model provides a two-way locking expand set structure, the internal thread of interior dabber is twisted into through the external screw thread to the extrusion lid including the bipyramid spring dop installation, the conical surface cooperation of conical surface and interior dabber behind the bipyramid spring dop, the conical surface cooperation of conical surface and extrusion lid before the bipyramid spring dop, can change the cooperation relation of interior dabber and work piece, two strong points that the bipyramid spring dop formed through the adjustment extrusion lid in the epaxial screw-in degree of depth of interior dabber. The utility model discloses an above-mentioned structure has solved the technical problem that the structure is complicated, the result of use is poor that exists among the prior art, provides a support stability height, simple structure's two-way locking's bloated cover structure.
Description
Technical Field
The utility model relates to a central lathe field is walked in numerical control, specifically is a two-way locking's of central lathe bloated cover structure is walked in numerical control.
Background
The numerical control center-walking machine tool is an economical composite machine tool capable of performing machining such as driving, drilling, boring and the like, and can meet various composite machining process requirements by clamping once. The numerical control center-moving machine tool is mainly used for machining precision small-scale batch hardware parts and small-scale shaft special-shaped batch parts, and along with the continuous development of the industrialization process, the numerical control center-moving machine tool is gradually applied to machining products in various manufacturing industries in the society at present in order to meet the market demand, particularly the precision machining of the batch small-scale parts, and the machining efficiency is improved. There are some guide sleeve structures, but there are some technical problems in contrast:
patent ZL201610832627.2 provides a high accuracy numerical control and walks heart lathe main shaft, and patent ZL201820537686.1 provides a movable guide pin bushing device that is used for walking on the heart machine, and movable guide pin bushing device is installed on similar patent ZL201610832627.2 numerical control walks heart lathe main shaft, solves among the prior art when the work piece length of processing surpasss linkage cover stroke, need to process the work piece many times, and the junction of adjacent twice processing has the tool mark on the work piece so that the machining precision is poor technical defect. The spindle of the movable guide sleeve of patent ZL201820537686.1 is driven by a motor and belt wheel mechanism to rotate synchronously with the main shaft of the walking machine, but the introduction of a group of transmission mechanisms increases the structural complexity.
Patent ZL201820929844.8 provides an internal expanding clamp for workpiece production of a walking machine, which expands or contracts the part of the clamp body holding the workpiece through the back and forth linear motion of a top core, thereby achieving the functions of expanding and loosening. However, the internal expanding clamp provided by patent ZL201820929844.8 needs to be installed on a movable guide sleeve similar to patent ZL201820537686.1, which complicates the structure of the whole movable guide sleeve device.
Patent ZL 201721238583.7 provides a walk heart machine antiskid collet chuck, and the horn mouth of pressing from both sides the cover front end extrudees the frustum forward to with the inside extrusion of the centre gripping section of pressing from both sides the section of thick bamboo, press from both sides the axle piece in the tight centre gripping section, avoid appearing the axle piece and shift pivoted phenomenon, ensure axle piece machining precision, can not leave the indentation on the axle piece surface. The collet has long structure, complex shape, difficult processing and poor positioning stability of a conical surface.
Disclosure of Invention
In order to solve the problems, the utility model provides a two-way locking expansion sleeve structure, a double-cone spring chuck is sleeved outside a workpiece, and the outer side of the double-cone spring chuck is provided with a rear conical surface and a front conical surface; an inner mandrel is arranged outside the double-cone spring chuck, and an inner mandrel conical surface on the inner side of the inner mandrel is pressed on the rear conical surface; the front end of the inner core shaft is provided with a squeezing cover through threads, and the conical surface of the squeezing cover on the inner side of the squeezing cover is pressed on the front conical surface; a rear angle contact ball bearing and a front contact ball bearing are arranged on the outer side of the inner mandrel; the shell body is buckled outside rear angle contact ball bearing and front contact ball bearing, and the front end housing is installed to the front end of shell body, carries out spacing encapsulation to rear angle contact ball bearing and front contact ball bearing through shell body and front end housing. Through the structure, the utility model provides an existing among the prior art drive mechanism structure complicated, the parts machining difficulty, location centre gripping unstability scheduling problem.
In order to realize the purpose, the utility model discloses a technical scheme be: the utility model provides a two-way locking expand set structure which characterized in that: the double-cone spring chuck is sleeved outside the workpiece, and the outer side of the double-cone spring chuck is provided with a rear conical surface and a front conical surface; an inner mandrel is arranged outside the double-cone spring chuck, and an inner mandrel conical surface on the inner side of the inner mandrel is pressed on the rear conical surface; the front end of the inner core shaft is provided with a squeezing cover through threads, and the conical surface of the squeezing cover on the inner side of the squeezing cover is pressed on the front conical surface; a rear angle contact ball bearing and a front contact ball bearing are arranged on the outer side of the inner mandrel; the shell body is buckled outside rear angle contact ball bearing and front contact ball bearing, and the front end housing is installed to the front end of shell body, carries out spacing encapsulation to rear angle contact ball bearing and front contact ball bearing through shell body and front end housing.
The rear end part of the outer shell is axially and uniformly provided with a box body screw hole and an interface screw hole, and the rear end part of the outer shell is provided with an outer shell bearing outer flange; a rear angle contact ball bearing and a front contact ball bearing are arranged in the outer shell, an outer ring of the rear angle contact ball bearing is close to an outer flange of the bearing of the outer shell, and an outer ring retainer ring (4) is arranged between the rear angle contact ball bearing and the outer ring of the front contact ball bearing; and a screw I penetrates through a screw hole of the box body and is screwed into a threaded hole of the front end cover, and an outer flange of a front end cover bearing of the front end cover compresses an outer ring of the front contact ball bearing.
The inner mandrel is provided with an inner mandrel bearing inner flange which is close to an inner ring of the rear angle contact ball bearing, and an inner ring retainer ring is arranged between the rear angle contact ball bearing and an inner ring of the front contact ball bearing; the front end of the inner core shaft is provided with a fine-pressure external thread, a locking nut is screwed on the fine-pressure external thread and tightly presses an inner ring of the front contact ball bearing, and the rear end part of the inner core shaft is provided with threaded holes uniformly distributed in the circumferential direction
The double-cone spring chuck is arranged on the inner core shaft, an internal thread is arranged on the inner core shaft, the internal thread is matched with the external thread on the extrusion cover, and the extrusion cover is screwed into the internal thread of the inner core shaft through the external thread; the inner core shaft is provided with an inner core shaft conical surface, the extrusion cover is provided with an extrusion cover conical surface, the double-cone spring chuck is provided with a rear conical surface and a front conical surface, the rear conical surface is contacted with the inner core shaft conical surface, and the front conical surface is contacted with the extrusion cover conical surface.
The sealing ring is provided with a fine internal thread, the sealing ring is screwed into a fine external thread at the front end of the inner mandrel through the fine internal thread, and the sealing ring is provided with a labyrinth sealing groove.
The workpiece penetrates through a main shaft of the numerical control centering machine tool, the main shaft of the numerical control centering machine tool is connected through a key connection II and drives an inner sleeve of a transition shaft to rotate, and the inner sleeve of the transition shaft is connected through a key connection I and drives an outer sleeve of the transition shaft to rotate; the inner core shaft and the transition shaft outer sleeve are connected through a screw II to rotate together, the double-cone spring chuck is clamped on the inner core shaft through the extrusion cover to rotate together with the inner core shaft, and the workpiece is supported and clamped by the double-cone spring chuck.
The utility model has the advantages that:
1. the utility model discloses the structure is applied to the numerical control and walks heart lathe, install the shell body on the central lathe stand is walked in the numerical control through the screw, through the screw with the transition off-axial sleeve on being connected to the inner core axle, transition off-axial sleeve and transition off-axial sleeve pass through the key-type connection transmission, inner skleeve and numerical control walk heart lathe main shaft fixed connection, inner skleeve and numerical control walk a lathe main shaft and pass through the key-type connection transmission, the work piece passes bipyramid spring dop, form two point supports, the strong point is preceding strong point and back strong point respectively, play the function of uide bushing, and the steam generator is simple in.
2. The utility model provides a bipyramid spring dop has two conical surfaces, and the back conical surface cooperates with inner mandrel conical surface, and preceding conical surface and the cooperation of extrusion lid conical surface can change the shaft hole cooperation relation of inner mandrel and work piece through the wrong income degree of depth of adjustment extrusion lid on the inner mandrel, and two strong points that bipyramid spring dop formed have improved the stability of support.
3. The utility model provides a two-way locking's bloated cover structure has thin tooth internal thread on the sealing ring, and the sealing ring has the labyrinth seal groove through the thin tooth external screw thread of twisting into the inner core axle in the thin tooth internal thread, can prevent that smear metal and cutting fluid from getting into the bearing on the sealing ring.
Drawings
Fig. 1 is a sectional view of the structure of the present invention.
Fig. 2 is a schematic view of the structure installation and use of the present invention.
In the figure, 1 outer shell; 1.1 outer flange of the bearing of the outer shell; 1.2 screw holes of the box body; 1.3 interface screw holes; 2, an inner mandrel; 2.1 inner flange of inner core shaft bearing; 2.2 fine external thread; 2.3 inner mandrel conical surface; 2.4 internal threads; 2.5 a threaded hole; 3, a rear angle contact ball bearing; 4, an outer ring retainer ring; 5, an inner ring retainer ring; 6, front angle contact ball bearing; 7, a front end cover; 7.1 a threaded hole; 7.2 front end cover bearing outer flange; 8, locking a nut; 9 double-cone spring chuck; 9.1 rear cone; 9.2 front conical surface; 9.3 clamping holes; 10 extruding a cover; 10.1 external threads; 10.2 extruding the conical surface of the cover; 11 a sealing ring; 11.1 fine internal thread; 11.2 labyrinth seal grooves; 12, a screw I; 13, a screw II; 14 a transition shaft outer sleeve; 15 transition shaft inner sleeve; 16 is connected with I; 17 is linked to II; 18 screw III; 19 numerical control centering machine tool upright column; 20 numerical control centering machine tool main shaft; 21 a workpiece; 22.1 front support point; 22.2 rear support point.
Detailed Description
A expansion sleeve structure with bidirectional locking is characterized in that a double-cone spring chuck 9 is sleeved outside a workpiece 21, and the outer side of the double-cone spring chuck 9 is provided with a rear conical surface 9.1 and a front conical surface 9.2; an inner mandrel 2 is arranged outside the double-cone spring chuck 9, and an inner mandrel conical surface 2.3 on the inner side of the inner mandrel 2 is pressed on a rear conical surface 9.1; the front end of the inner mandrel 2 is provided with an extrusion cover 10 through threads, and an extrusion cover conical surface 10.2 at the inner side of the extrusion cover 10 is pressed on a front conical surface 9.2; a rear angle contact ball bearing 3 and a front contact ball bearing 6 are arranged on the outer side of the inner mandrel 2; the outer shell 1 is buckled outside the rear angle contact ball bearing 3 and the front contact ball bearing 6, the front end cover 7 is installed at the front end of the outer shell 1, and the rear angle contact ball bearing 3 and the front contact ball bearing 6 are limited and packaged through the outer shell 1 and the front end cover 7.
The rear end part of the outer shell 1 is axially and uniformly provided with a box body screw hole 1.2 and an interface screw hole 1.3, and the rear end part of the outer shell 1 is provided with an outer shell bearing outer flange 1.1; a rear angle contact ball bearing 3 and a front contact ball bearing 6 are arranged in the outer shell 1, an outer ring of the rear angle contact ball bearing 3 is close to an outer flange 1.1 of the outer shell bearing, and an outer ring retainer ring 4 is arranged between the rear angle contact ball bearing 3 and the outer ring of the front contact ball bearing 6; the screw I12 passes through the screw hole 1.2 of the box body and is screwed into the screw hole 7.1 of the front end cover 7, and the front end cover bearing outer flange 7.2 of the front end cover 7 presses the outer ring of the front contact ball bearing 6.
The inner mandrel 2 is provided with an inner mandrel bearing inner flange 2.1, the inner mandrel bearing inner flange 2.1 is close to an inner ring of the rear angle contact ball bearing 3, and an inner ring retainer ring 5 is arranged between the rear angle contact ball bearing 3 and an inner ring of the front contact ball bearing 6; the front end of the inner core shaft 2 is provided with a fine-pressure external thread 2.2, a locking nut 8 is screwed on the fine-pressure external thread 2.2, the locking nut 8 compresses an inner ring of the front contact ball bearing 6, and the rear end part of the inner core shaft 2 is provided with threaded holes 2.5 which are uniformly distributed in the circumferential direction
The double-cone spring chuck 9 is arranged on the inner core shaft 2, an internal thread 2.4 is arranged on the inner core shaft 2, the internal thread 2.4 is matched with an external thread 10.1 on the extrusion cover 10, and the extrusion cover 10 is screwed into the internal thread 2.4 of the inner core shaft 2 through the external thread 10.1; the screwing depth of the extrusion cover 10 on the inner core shaft 2 is adjusted, the size of the clamping hole 9.3 is changed, and the matching relation and the clamping force of the clamping hole 9.3 and the shaft hole of the workpiece 21 are adjusted.
The inner mandrel 2 is provided with an inner mandrel conical surface 2.3, the extrusion cover 10 is provided with an extrusion cover conical surface 10.2, the double-cone spring chuck 9 is provided with a rear conical surface 9.1 and a front conical surface 9.2, the rear conical surface 9.1 is contacted with the inner mandrel conical surface 2.3, and the front conical surface 9.2 is contacted with the extrusion cover conical surface 10.2. The rear conical surface 9.1 and the inner mandrel conical surface 2.3 are matched to form a supporting point 22.2, the front conical surface 9.2 and the extrusion cover conical surface 10.2 are matched to form a supporting point 22.1, and the supporting point 22.1 and the supporting point 22.2 form double-point support, so that the supporting stability is improved.
The sealing ring 11 is provided with a fine thread internal thread 11.1, the sealing ring 11 is screwed into a fine thread external thread 2.2 at the front end of the inner core shaft 2 through the fine thread internal thread 11.1, and the sealing ring 11 is provided with a labyrinth sealing groove 11.2 which can prevent cutting scraps and cutting fluid from entering a bearing.
When in specific use:
fig. 2 is a schematic view of the installation and use of a bidirectional locking expansion sleeve structure, an outer shell 1 is installed on a column 19 of a numerical control center-walking machine tool through a screw III18, a transition shaft outer sleeve 14 is connected to an inner core shaft 2 through a screw III13, the transition shaft outer sleeve 14 and the transition shaft inner sleeve 15 are in transmission through a key connection I16, the transition shaft inner sleeve 15 and a main shaft 20 of the numerical control center-walking machine tool are fixedly connected, the transition shaft inner sleeve 15 and the main shaft 20 of the numerical control center-walking machine tool are in transmission through a key connection II17, a workpiece 21 passes through a double-cone spring chuck 9 to form two-point support, and the support points are a front support point 22.1 and a rear support point 22.
During processing, a workpiece 21 passes through a main shaft 20 of the numerical control centering machine tool, the main shaft 20 of the numerical control centering machine tool is connected through a key connection II17 and drives an inner sleeve 15 of a transition shaft to rotate, and the inner sleeve 15 of the transition shaft is connected through a key connection I16 and drives an outer sleeve 14 of the transition shaft to rotate; the inner core shaft 2 and the transition shaft outer sleeve 14 are connected through a screw II13 to rotate together, the double-cone spring chuck 9 is clamped on the inner core shaft 2 through the extrusion cover 10 to rotate together with the inner core shaft 2, and the double-cone spring chuck 9 supports and clamps the workpiece 21; the double-cone spring chuck 9 and the workpiece 21 do not rotate relatively, so that the workpiece 21 can be prevented from being scratched in the machining process.
Claims (5)
1. The utility model provides a two-way locking expand set structure which characterized in that: the double-cone spring chuck (9) is sleeved outside the workpiece (21), and the outer side of the double-cone spring chuck (9) is provided with a rear conical surface (9.1) and a front conical surface (9.2); an inner mandrel (2) is arranged outside the double-cone spring chuck (9), and an inner mandrel conical surface (2.3) on the inner side of the inner mandrel (2) is pressed on the rear conical surface (9.1); the front end of the inner mandrel (2) is provided with an extrusion cover (10) through threads, and an extrusion cover conical surface (10.2) on the inner side of the extrusion cover (10) is pressed on the front conical surface (9.2); a rear angle contact ball bearing (3) and a front contact ball bearing (6) are arranged on the outer side of the inner core shaft (2); the outer shell (1) is buckled outside the rear angle contact ball bearing (3) and the front contact ball bearing (6), the front end cover (7) is installed at the front end of the outer shell (1), and the rear angle contact ball bearing (3) and the front contact ball bearing (6) are limited and packaged through the outer shell (1) and the front end cover (7).
2. The expansion sleeve structure with bidirectional locking according to claim 1, characterized in that: the rear end part of the outer shell (1) is axially and uniformly provided with box body screw holes (1.2) and interface screw holes (1.3), and the rear end part of the outer shell (1) is provided with an outer shell bearing outer flange (1.1); a rear angle contact ball bearing (3) and a front contact ball bearing (6) are arranged in the outer shell (1), an outer ring of the rear angle contact ball bearing (3) is close to an outer flange (1.1) of the outer shell bearing, and an outer ring retainer ring (4) is arranged between the rear angle contact ball bearing (3) and the outer ring of the front contact ball bearing (6); a screw I (12) penetrates through a screw hole (1.2) of the box body and is screwed into a threaded hole (7.1) of the front end cover (7), and an outer flange (7.2) of a front end cover bearing of the front end cover (7) compresses an outer ring of the front contact ball bearing (6).
3. The expansion sleeve structure with bidirectional locking according to claim 1, characterized in that: the inner mandrel (2) is provided with an inner mandrel bearing inner flange (2.1), the inner mandrel bearing inner flange (2.1) is close to an inner ring of the rear angle contact ball bearing (3), and an inner ring retainer ring (5) is arranged between the rear angle contact ball bearing (3) and an inner ring of the front contact ball bearing (6); the front end of the inner core shaft (2) is provided with a fine-pressure external thread (2.2), a locking nut (8) is screwed on the fine-pressure external thread (2.2), the locking nut (8) compresses an inner ring of the front contact ball bearing (6), and the rear end part of the inner core shaft (2) is provided with threaded holes (2.5) which are uniformly distributed in the circumferential direction.
4. The expansion sleeve structure with bidirectional locking according to claim 1, characterized in that: the double-cone spring chuck (9) is arranged on the inner core shaft (2), an internal thread (2.4) is arranged on the inner core shaft (2), the internal thread (2.4) is matched with an external thread (10.1) on the extrusion cover (10), and the extrusion cover (10) is screwed into the internal thread (2.4) of the inner core shaft (2) through the external thread (10.1); the inner mandrel (2) is provided with an inner mandrel conical surface (2.3), the extrusion cover (10) is provided with an extrusion cover conical surface (10.2), the double-cone spring chuck (9) is provided with a rear conical surface (9.1) and a front conical surface (9.2), the rear conical surface (9.1) is contacted with the inner mandrel conical surface (2.3), and the front conical surface (9.2) is contacted with the extrusion cover conical surface (10.2).
5. The expansion sleeve structure with bidirectional locking according to claim 1, characterized in that: the workpiece (21) penetrates through a main shaft (20) of the numerical control centering machine tool, the main shaft (20) of the numerical control centering machine tool is connected through a key connection II (17) and drives an inner sleeve (15) of a transition shaft to rotate, and the inner sleeve (15) of the transition shaft is connected through a key connection I (16) and drives an outer sleeve (14) of the transition shaft to rotate; the inner core shaft (2) and the transition shaft outer sleeve (14) are connected through a screw II (13) to rotate together, the double-cone spring chuck (9) is clamped on the inner core shaft (2) through the extrusion cover (10) to rotate together with the inner core shaft (2), and the double-cone spring chuck (9) supports and clamps a workpiece (21).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921022966.XU CN210702642U (en) | 2019-07-02 | 2019-07-02 | Expansion sleeve structure capable of being locked in two directions |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921022966.XU CN210702642U (en) | 2019-07-02 | 2019-07-02 | Expansion sleeve structure capable of being locked in two directions |
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| Publication Number | Publication Date |
|---|---|
| CN210702642U true CN210702642U (en) | 2020-06-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921022966.XU Active CN210702642U (en) | 2019-07-02 | 2019-07-02 | Expansion sleeve structure capable of being locked in two directions |
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| Country | Link |
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| CN (1) | CN210702642U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110193612A (en) * | 2019-07-02 | 2019-09-03 | 沈阳机床(集团)有限责任公司 | A kind of expansion set structure of bidirectional locking |
-
2019
- 2019-07-02 CN CN201921022966.XU patent/CN210702642U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110193612A (en) * | 2019-07-02 | 2019-09-03 | 沈阳机床(集团)有限责任公司 | A kind of expansion set structure of bidirectional locking |
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Address after: No.17-A 1-8, Kaifa Road, Economic and Technological Development Zone, Yuhong District, Shenyang, 110000 Liaoning Province Patentee after: General Technology Group Shenyang Machine Tool Co.,Ltd. Address before: No.17-A 1-8, Kaifa Road, Economic and Technological Development Zone, Yuhong District, Shenyang, 110000 Liaoning Province Patentee before: SHENYANG MACHINE TOOL (GROUP) CO.,LTD. |