CN213858187U

CN213858187U - Sleeve type collet central frame structure

Info

Publication number: CN213858187U
Application number: CN202023083093.9U
Authority: CN
Inventors: 刘鹏飞; 房超; 蔡红霞
Original assignee: Jinan First Machine Tool Group Co ltd
Current assignee: Jinan First Machine Tool Group Co ltd
Priority date: 2020-12-17
Filing date: 2020-12-17
Publication date: 2021-08-03
Anticipated expiration: 2030-12-17

Abstract

The utility model discloses a telescopic collet chuck centre frame structure, its structure includes bottom plate, the upper part of the body, power device, drive mechanism and clamping device, be equipped with the upper part of the body on the bottom plate, the upper part of the body top is equipped with power device, drive mechanism is connected with the power device output, and drive mechanism's drive end is connected with clamping device, and power device controls drive mechanism, drive mechanism controls clamping device's the tight action of clamp or unclamps. 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

Sleeve type collet central frame structure

Technical Field

The utility model relates to a fixture, specific telescopic collet chuck center frame structure that says so.

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.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a telescopic collet chuck centre frame structure, this compact structure, usable spatiality is strong, simple reliable be applicable to processing major diameter, long thin wall part, and the clamp force is balanced, prevents that the work piece centre gripping from warping.

The utility model provides a technical scheme that its technical problem adopted is: 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 round nut, and the elastic collet is provided with a break groove for realizing clamping force.

Further, a sealing ring for dust sealing and an O-shaped ring for sealing and lubricating 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 the hydraulic cylinder body inner chamber respectively.

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 utility model has the advantages that:

1. the utility model discloses a power device, drive mechanism and clamping device cooperation realize the clamp of work piece tightly, because elasticity collet chuck and work piece adopt the tight form of clamp of holding tightly, can prevent to cause the injury to the work piece, have solved the problem of processing major diameter, long thin wall part difficulty well, and the clamp force is balanced, can not cause the damage to the work piece, easy operation improves the machining 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 following detailed description of the center frame structure of the telescopic collet chuck according to the present invention will be made with reference to the accompanying drawings.

As shown in fig. 1 and 2, the utility model discloses a telescopic collet chuck center frame structure is with the concentric fixture of numerical control lathe, and its structure includes bottom plate 1, upper part of the body 2, power device, drive mechanism and clamping device, be equipped with upper part of the body 2 on the bottom plate 1, the internal portion of upper part of the body is located to clamping device clamping part, the upper part of the body top is equipped with power device, drive mechanism is connected with the power device output, and drive mechanism's drive end is connected with clamping device, and power device control drive mechanism, drive mechanism control clamping device press from both sides tightly or loosen the action to the realization is tight to the clamp of work piece.

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 17, and the elastic collet chuck 24 is matched with the collet housing 17 to realize rotation in the upper body 2 through the bearing, so that the workpiece can be processed in a rotating mode after being clamped. A spacer 19 and a shaft circlip 20 are provided between the terminal bearing 22 and the deep groove ball bearing 18, and function to block and fix the terminal bearing. To improve the stability of the collet housing rotation, two deep groove ball bearings 18 may be provided. The inner end of the elastic collet chuck 24 is matched with the inner wall of the collet chuck outer sleeve 17 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 26 and an outer pulling sleeve 27, the inner pulling sleeve 26 is sleeved with an elastic collet chuck 24, the outer pulling sleeve is sleeved with the inner pulling sleeve and is internally provided with a terminal bearing 22, an adjusting nut 25 for adjusting the gap between the outer pulling sleeve and the inner pulling sleeve is arranged on the outer wall of the inner pulling sleeve, the inner pulling sleeve 26 is fixed on the elastic collet chuck 24 through a round nut 28, and the elastic collet chuck 24 is provided with a breaking groove 29 for realizing clamping force. When the elastic collet chuck 24 is in a loose state, the disconnection groove 29 is in an open state, when clamping is realized, the elastic collet chuck 24 moves rightwards under the driving of the outer pulling sleeve, and because the left end of the elastic collet chuck 24 is in a conical shape, the elastic collet chuck moves rightwards, the conical inner wall of the collet chuck outer sleeve 17 generates extrusion force on the elastic collet chuck, and the disconnection groove on the elastic collet chuck is closed, so that the clamping effect on a workpiece is realized.

And a first sealing ring 14 and a second sealing ring 23 for dust-proof sealing and a fourth O-ring 16 for sealing and lubricating are arranged on the collet sleeve 17.

As shown in fig. 1, power device includes coupling 3, pneumatic cylinder left side lid 4, hydraulic cylinder body 5, pneumatic cylinder right side lid 9 and piston rod 10, hydraulic cylinder body 5 locates the upper end of upper part of the body 2, and one side of hydraulic cylinder body 5 is equipped with pneumatic cylinder left side lid 4, corresponds the opposite side and is equipped with pneumatic cylinder right side lid 9, the one end of piston rod 10 is passed pneumatic cylinder right side lid 9 and is extended to hydraulic cylinder body 5 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 pneumatic 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 workpiece is loosened. The utility model discloses a problem of processing major diameter, long thin wall part difficulty has been solved well to the structure, and the clamp force is balanced, can not cause injury, easy operation to the work piece. And the processing precision is improved.

The foregoing is merely illustrative of some of the principles of the present invention and the description is not intended to limit the invention to the specific constructions and applications shown, so that all modifications and equivalents that may be utilized are within the scope of the invention.

Other technical features than those described in the specification are known to those skilled in the art.

Claims

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 the round nut, 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 sealing 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 joint for introducing hydraulic oil into the inner cavity of the hydraulic cylinder body.

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.