CN211305527U

CN211305527U - Hollow shaft turning and milling centering device and lathe centering assembly comprising same

Info

Publication number: CN211305527U
Application number: CN201921534119.1U
Authority: CN
Inventors: 张宏宇; 原火焰; 宁重生; 侯晓东; 李旭; 刘浩; 马庆坡; 张东生; 唐中正; 武杰
Original assignee: Henan Hongyang Precision Technology Co ltd
Current assignee: Henan Hongyang Precision Technology Co ltd
Priority date: 2019-09-16
Filing date: 2019-09-16
Publication date: 2020-08-21
Anticipated expiration: 2029-09-16

Abstract

The utility model relates to an axle type part milling process device field especially relates to a quill shaft turn-milling centring means and lathe centering subassembly including it, quill shaft turn-milling centring means is including tight cover and the dress of wearing of expanding tightly the tight post of expanding in the tight cover, the tight post of expanding is including tight portion and screw thread portion, wear to be equipped with on the screw thread portion and correspond terminal surface press fit's nut with the quill shaft, be equipped with on the terminal surface of screw thread portion with the roof pressure hole of tight post coaxial line expands, the tight post of expanding is in thereby the rotatory drive of nut down to the downthehole outer activity of inside hole and the tight cover of extrusion are in same straight line with the axis of hole in the even inflation in week, thereby the axis of guaranteeing inflation post, roof pressure hole and the axis of hole are located. The utility model discloses can self-centering, the axis of guaranteeing excircle, hole is located same straight line when milling the excircle of quill shaft, in addition the utility model discloses a quill shaft turnning and milling centring means dismouting, convenient to use, production efficiency has obtained the improvement.

Description

Hollow shaft turning and milling centering device and lathe centering assembly comprising same

Technical Field

The utility model relates to an axle type part milling process device field especially relates to a quill shaft turn-milling centring means reaches lathe subassembly including it.

Background

The shaft part is a common part in the field of machinery, and is usually machined by a machining method of clamping a bar on a lathe and then milling. In particular, when the hollow shaft is machined by the clamping method, an inner hole and a chamfer are drilled, and then clamping, centering and milling are performed. However, this machining method is poor in centering effect due to dimensional deviation of the raw material, machining error of the chamfer, and the like, and thus, it is easy to cause excessive deviation of the coaxiality of the outer circle and the inner hole.

SUMMERY OF THE UTILITY MODEL

The utility model provides a quill shaft turnning and milling centring means to solve prior art excircle, the too big problem of hole axiality deviation. Also provided is a lathe centering assembly comprising the hollow shaft turn-milling centering device.

The utility model discloses a quill shaft turn-milling centring means adopts following technical scheme:

the utility model provides a quill shaft turn-milling centring means, including the cylindric tight cover that expands that is used for inserting corresponding quill shaft hole and wear the dress and expand tight post in the tight cover that expands, expand tight post include with expand tight cover expand tight complex expand tight portion and the outer screw thread portion of overhanging hole, wear to be equipped with on the screw thread portion and correspond terminal surface press fit's nut with the quill shaft, be equipped with on the terminal surface of screw thread portion with expand tight post coaxial line, be used for the roof pressure hole of corresponding lathe thimble roof pressure, expand tight post and be in thereby the nut is rotatory to be driven down to the downthehole activity and the extrusion tight cover of extrusion evenly expand in week, thereby the axis of extrusion hole inner wall and the axis of hole of guaranteeing to expand post, roof pressure hole are located same straight line.

The expansion sleeve is conical, and the diameter of the outer periphery of the expansion sleeve is not smaller than that of the inner hole.

At least three expansion joints which are convenient to expand are arranged on the expansion sleeve along the circumferential direction.

And a gasket for preventing the end face of the hollow shaft from being scratched is arranged between the nut and the end face corresponding to the hollow shaft.

The utility model discloses a lathe centering subassembly adopts following technical scheme:

a lathe centering assembly comprises a lathe and a hollow shaft turning and milling centering device for centering a hollow shaft, wherein the lathe comprises a clamping jaw and an ejector pin for clamping and fixing the hollow shaft, the hollow shaft turning and milling centering device is arranged in an inner hole of one end, corresponding to the ejector pin, of the hollow shaft, the hollow shaft turning and milling centering device comprises a cylindrical expansion sleeve for inserting into the inner hole of the corresponding hollow shaft and an expansion column penetrating in the expansion sleeve, the expansion column comprises an expansion part in expansion fit with the expansion sleeve and a threaded part overhanging out of the inner hole, a nut in compression fit with the end face corresponding to the hollow shaft penetrates through the threaded part, a jacking hole coaxial with the expansion column and used for jacking the corresponding ejector pin of a machine tool is arranged on the end face of the threaded part, the expansion column moves outwards of the inner hole under the driving of the nut to rotate and extrudes the expansion sleeve, and the expansion sleeve uniformly expands in the circumferential direction, The inner wall of the inner hole is extruded, so that the axes of the expansion column and the jacking hole and the axis of the inner hole are positioned on the same straight line.

The utility model has the advantages that: the utility model is provided with the expansion sleeve and the expansion post which are inserted into the inner hole, the nut arranged on the thread part of the expansion post can pull the expansion post to move towards the inner hole and the expansion post drives the expansion sleeve to move, when the friction force between the expansion sleeve and the inner hole wall is enough or the expansion sleeve is in press fit with the nut, the relative position of the expansion sleeve and the inner hole is not changed, and the expansion column expands the expansion sleeve by continuously screwing the bolt, so that the expansion sleeve is tightly attached to the inner hole wall, the axial line of the expansion column is fixed and is positioned on the same straight line with the axial line of the inner hole, therefore, the ejector pin is pressed against the pressing hole on the end part of the expansion column, the axis of the pressing hole is positioned on the axis of the inner hole, the ejector pin can be ensured to be centered on the axis of the inner hole, the purpose of automatic centering is achieved, therefore, the axes of the excircle and the inner hole are positioned on the same straight line when the excircle of the hollow shaft is milled, and the processing precision and quality are ensured. In addition the utility model discloses a quill shaft turnning and milling centring means dismouting, convenient to use need not carry out the chamfer process again during processing quill shaft, and production efficiency has obtained the improvement.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive exercise.

Fig. 1 is a schematic structural diagram of an embodiment of a hollow shaft turning and milling centering device according to the present invention;

FIG. 2 is an enlarged schematic view of a portion A of FIG. 1;

FIG. 3 is a front view of the expansion sleeve;

FIG. 4 is a left side view corresponding to FIG. 3;

FIG. 5 is a schematic structural view of the expansion column;

in the figure: 1. a hollow shaft; 2. an inner bore; 3. expanding the column; 4. expanding and tightening the sleeve; 41. expanding the seam; 42. an expansion part; 5. a nut; 6. a gasket; 7. and pressing the hole.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

The utility model discloses an embodiment of quill shaft turn-milling centring means, as shown in fig. 1 to 5, a quill shaft turn-milling centring means, including the cylindric tight cover 4 that expands and wear the dress in the tight cover 4 that expands that is used for inserting quill shaft 1 hole 2 tight post 3 that expands, tight post 3 that expands includes with the tight cover 4 that expands the tight complex portion that expands and the screw thread portion outside the hole 2 that overhangs, wear to be equipped with on the screw thread portion and correspond terminal surface compress tightly complex nut 5 with quill shaft 1, be equipped with on the terminal surface of screw thread portion with the tight 3 coaxial lines of the tight post that expands, a roof pressure hole 7 for corresponding lathe thimble roof pressure, tight post 3 that expands is driven down at nut 5 rotation to the outer activity of hole 2 and extrudees tight cover 4 evenly expanded in circumference, thereby 2 inner walls of extrusion hole guarantee the expansion bolt, the axis of roof pressure hole 7 is located same straight line with the axis of hole 2.

The expansion sleeve 4 is conical, the large end corresponds to the expansion part of the expansion column 3, the large end is the expansion part 42, and the peripheral diameter of the expansion part 42 of the expansion sleeve 4 is not smaller than that of the inner hole 2.

And three expansion joints 41 which are convenient to expand are arranged at one end of the expansion sleeve 4, which corresponds to the expansion part of the expansion column 3, along the circumferential direction. The number of expansion gaps may also be more than three in other embodiments.

And a gasket 6 for preventing the end surface of the hollow shaft 1 from being scratched is arranged between the nut 5 and the end surface corresponding to the hollow shaft 1.

The utility model discloses set up the tight cover 4 of expanding and the tight post 3 of expanding in inserting hole 2, nut 5 setting up at the one end of the screw thread portion of tight post 3 of expanding can stimulate tight post 3 of expanding to hole 2 outer activity, the activity of tight post 3 of expanding drives the tight cover 4 activity of expanding, after the tight cover 4 of expanding is enough with the frictional force of hole 2 wall or tight cover 4 and nut 5 roof pressure cooperation of expanding, the tight cover 4 of expanding is no longer changed with the relative position of hole 2, and continue to screw the bolt and then can make the tight portion of expanding of tight post 3 of expanding expand tight cover 4 of expanding, thereby the tight cover 4 of expanding tightly pastes on hole 2 wall tightly, the axis of tight post 3 of expanding this moment is fixed and is located same straight line with the axis of hole 2, consequently, make the tight post 3 tip of thimble roof pressure, roof pressure hole 7 that the axis is located on the axis of hole 2 can guarantee that the thimble is centering on the axis of hole 2, reach the purpose of automatic centering, thereby guarantee when milling the excircle of quill shaft 1, The axes of the inner holes 2 are positioned on the same straight line, so that the processing precision and quality are ensured. Additionally the utility model discloses a quill shaft turnning and milling centering subassembly dismouting, convenient to use needn't carry out the chamfer process again when processing quill shaft 1, and production efficiency has obtained the improvement.

A lathe centering assembly comprises a lathe and a hollow shaft turning and milling centering device used for centering the hollow shaft, wherein the lathe comprises a claw and an ejector pin used for clamping and fixing the hollow shaft, the hollow shaft turning and milling centering device is arranged in an inner hole of one end, corresponding to the ejector pin, of the hollow shaft, and the hollow shaft turning and milling centering device is the hollow shaft turning and milling centering device, so that the hollow shaft turning and milling centering device is not repeated.

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a quill shaft turnning and milling centring means which characterized in that: including the cylindric tight cover that expands that is used for inserting corresponding quill shaft hole and wear the dress and expand tight post in the tight cover that expands, expand tight post include with expand tight cover expand tight complex expand tight portion and hang the screw thread portion outside stretching out the hole, wear to be equipped with on the screw thread portion and correspond terminal surface press fit's nut with the quill shaft, be equipped with on the terminal surface of screw thread portion with expand tight post coaxial line, be used for the roof pressure hole of corresponding lathe thimble roof pressure, expand tight post and thereby the nut is rotatory to the downthehole activity outward and the extrusion tight cover of extrusion is evenly expanded in week, extrudees the inner wall of the hole thereby guarantee that the axis of expand post, roof pressure hole and the axis of hole are located same straight line.

2. A hollow shaft turn-milling centering device as claimed in claim 1, wherein: the expansion sleeve is conical, and the diameter of the outer periphery of the expansion sleeve is not smaller than that of the inner hole.

3. A hollow shaft turning and milling centering device according to claim 1 or 2, characterized in that: at least three expansion joints which are convenient to expand are arranged on the expansion sleeve along the circumferential direction.

4. A hollow shaft turn-milling centering device as claimed in claim 1, wherein: and a gasket for preventing the end face of the hollow shaft from being scratched is arranged between the nut and the end face corresponding to the hollow shaft.

5. The utility model provides a lathe centering subassembly, includes lathe and is used for the hollow shaft turn-milling centring means of centering to the hollow shaft, the lathe is including being used for pressing from both sides jack catch, the thimble of dress fixed hollow shaft, the hollow shaft turn-milling centring means sets up in the hole of one end that the hollow shaft corresponds the thimble, its characterized in that: the hollow shaft turning and milling centering device comprises a cylindrical expansion sleeve used for being inserted into an inner hole of a corresponding hollow shaft and an expansion column arranged in the expansion sleeve in a penetrating mode, the expansion column comprises an expansion part matched with the expansion sleeve in an expansion mode and a threaded part outside an overhanging inner hole, a nut matched with the hollow shaft in a pressing mode is arranged on the threaded part in a penetrating mode, a jacking hole coaxial with the expansion column and used for jacking the corresponding machine tool thimble is formed in the end face of the threaded part, the expansion column is driven by the nut to move outwards of the inner hole under the rotation driving, the expansion sleeve is extruded, the inner wall of the inner hole is uniformly expanded in the circumferential direction, and the axis of the expansion column and the jacking hole and the axis of the inner hole are located on the same straight line.

6. The lathe centering assembly of claim 5, wherein: the expansion sleeve is conical, and the diameter of the outer periphery of the expansion sleeve is not smaller than that of the inner hole.

7. A lathe centring assembly as claimed in claim 5 or 6, wherein: at least three expansion joints which are convenient to expand are arranged on the expansion sleeve along the circumferential direction.

8. The lathe centering assembly of claim 5, wherein: and a gasket for preventing the end face of the hollow shaft from being scratched is arranged between the nut and the end face corresponding to the hollow shaft.