CN201791976U

CN201791976U - Oval-cross-section shaft workpiece processing device assembled on lathe

Info

Publication number: CN201791976U
Application number: CN201020277865XU
Authority: CN
Inventors: 吴永祥; 黄景飞; 沈世德; 赵志龙
Original assignee: Changshu Institute of Technology
Current assignee: Changshu Institute of Technology
Priority date: 2010-07-29
Filing date: 2010-07-29
Publication date: 2011-04-13
Anticipated expiration: 2020-07-29

Abstract

An oval-cross-section shaft workpiece processing device assembled on a lathe belongs to machining devices. The lathe comprises a lathe bed with a lathe spindle, a headstock and a tailstock, wherein the lathe spindle is arranged on the headstock and provided with a spindle axial through hole. The oval-cross-section shaft workpiece processing device comprises a main eccentric rotating mechanism and an auxiliary eccentric rotating mechanism, wherein the main eccentric rotating mechanism is used for clamping a workpiece and carrying the workpiece to rotate along an oval motion track during rotation, the auxiliary eccentric rotating mechanism is used for clamping the workpiece which is clamped on the main eccentric rotating mechanism and also rotating along the oval motion track, the main eccentric rotating mechanism is connected with the lathe spindle, the auxiliary eccentric rotating mechanism is rotationally arranged on the tailstock, and the main eccentric rotating mechanism and the auxiliary eccentric rotating mechanism are kept on the same axis. The processing device can process oval cross sections on shaft workpieces, has the advantages of fast processing, high processing precision and simple structure, and avoids excessive modification on the lathe.

Description

Be disposed at the shaft of elliptical cross-section class Work treatment installation on the lathe

Technical field

The utility model belongs to the machinery processing apparatus technical field, is specifically related to a kind of shaft of elliptical cross-section class Work treatment installation that is disposed on the lathe.

Background technology

The axial workpiece of the oval cross section why application in plant equipment is very general, is can show ultimate attainment connection reliability because the axis hole of oval cross section connects and cooperates.Reason as known under the bigger situation of transmitted power, connects if adopt flat key, spline to implement the hole axle, then keyway can weaken the intensity of hole axle, reduce the ability that hole axle part bears moment of torsion, influence connection reliability, and the manufacturability of splined hole and axle processing is poor.Therefore adopt the shaft-like workpiece of oval cross section to implement the weakness that hole axle connection can remedy aforesaid spline or flat key connection.But the requirement on machining accuracy of oval cross section axial workpiece is extremely harsh, and working (machining) efficiency lowly is that present industry is known and generally acknowledged.

Prior art mainly adopts profiling, digital control processing and laser cutting etc. to the processing of oval cross section axial workpiece.The machining accuracy and the efficient of profiling processing are all unsatisfactory; Though digital control processing and Laser cutting can remedy the shortcoming of profiling processing, equipment investment is big.

In disclosed Chinese patent literature, rare technical information about shaft of elliptical cross-section class Work treatment installation, utility model patent Granted publication CN2180368Y recommends to have a kind of on-circular cross-section Work treatment installation, though this technical scheme has the capable described technique effect of its Instructions Page 2 27-29, structure is very complicated.

Summary of the invention

Task of the present utility model is to provide a kind of and helps to improve working (machining) efficiency and ensure machining accuracy and help simplified structure and use the shaft of elliptical cross-section class Work treatment installation on the lathe of being disposed at that reduces investment cost.

Task of the present utility model is finished like this, a kind of shaft of elliptical cross-section class Work treatment installation that is disposed on the lathe, described lathe comprises having lathe spindle, the body of lathe bed of headstock and lathe tailstock, the vehicle body main shaft is located on the headstock, and this lathe spindle has a main shaft axially extending bore, described shaft of elliptical cross-section class Work treatment installation comprises that one is used to clamp workpiece and takes workpiece when rotated be used for being clipped on that workpiece on the main eccentvic rotation mechanism is seized on both sides by the arms and when rotated equally with the auxiliary eccentvic rotation mechanism of the movement locus rotation of ellipse with the main eccentvic rotation mechanism and of the movement locus of ellipse rotation, main eccentvic rotation mechanism is connected with described lathe spindle, and auxiliary eccentvic rotation mechanism is arranged on the described lathe tailstock rotationally, and remains on the same axis with main eccentvic rotation mechanism.

In a specific embodiment of the present utility model, described main eccentvic rotation mechanism comprises first pull bar, the first chute dish, first eccentric bushing, first sliding shoe, first rotary disk and workpiece dog plate, first pull bar is arranged in the main shaft axially extending bore of described lathe spindle rotationally, and the left side of this first pull bar, right-hand member all is stretched over outside the main shaft axially extending bore, wherein, the left end of first pull bar is fixedlyed connected with the left end of lathe spindle, the first chute dish is fixedlyed connected with the right-hand member of lathe spindle, central authorities at the first chute dish offer an eccentric spindle nose hole, on the end face of the left end of first eccentric bushing and an inclined to one side side have an eccentric spindle nose, this off-centre spindle nose is placed in the described eccentric spindle nose hole, and be connected with the right-hand member of described first pull bar, first sliding shoe and first rotary disk are slidingly matched, position placed in the middle at the long side direction of this first sliding shoe is installed with a sliding shoe axle, this sliding shoe axle is towards described first eccentric bushing, and be inserted in first eccentric bushing and fixedly connected with first eccentric bushing, first rotary disk matches with the described first chute dish, and the workpiece dog plate and first rotary disk are fixed.

In another specific embodiment of the present utility model, described first pull bar has a pair of clutch shaft bearing seat, this is arranged in the described main shaft axially extending bore the clutch shaft bearing seat, and on each clutch shaft bearing seat, respectively be provided with clutch shaft bearing, first pull bar is arranged on a pair of clutch shaft bearing rotationally, wherein: the left end of first pull bar is fixedlyed connected with the left end of described lathe spindle by draw-bar guide, and the right-hand member of first pull bar is processed with first pull rod screw, described eccentric spindle nose has an eccentric shaft head thread hole, described first pull rod screw and eccentric shaft head thread hole screw thread connect, inserted a bearing holder (housing, cover) in described first eccentric bushing, and on first eccentric bushing, offer a supporting screw hole, be equipped with a supporting hold-down screw on the supporting screw hole, the sliding shoe axle of described first sliding shoe is inserted in the described bearing holder (housing, cover) and by described supporting hold-down screw supporting and fixes.

In another specific embodiment of the present utility model, the described first chute dish is offering a pair of first dovetail chute on the card of a side of described first rotary disk, this remains on the same straight line with 180 ° of intervals on the card of the first chute dish each other to the first dovetail chute; Described first rotary disk is offered one second dovetail chute on the card of a side of the described first chute dish, this second dovetail chute and the described a pair of first dovetail chute constitute cross position relation, on the card of a side of the described first chute dish, also be extended with a pair of position and the corresponding first dovetail guide block of the described first dovetail chute equally at first rotary disk, the first dovetail guide block is placed in the described first dovetail chute, and described first sliding shoe matches with the second dovetail chute.

In another specific embodiment of the present utility model, constitute one first at the described first chute dish on the card of a side of described first rotary disk piece of stepping down is installed, this first is installed the piece of stepping down and by first step down piece hold-down screw and the first chute dish is installed and is fixed.

Also have in the specific embodiment of the present utility model, described auxiliary eccentvic rotation mechanism comprises tailing axle, second pull bar, the second chute dish, second eccentric bushing, the second sliding shoe, second rotary disk and workpiece are helped seat, tailing axle is arranged on the described lathe tailstock rotationally, this tailing axle has a tailing axle axially extending bore, second pull bar is arranged in the tailing axle axially extending bore rotationally, and the left side of this second pull bar, right-hand member all is stretched over outside the tailing axle axially extending bore, the second chute dish is fixedlyed connected with the left end of tailing axle, central authorities at this second chute dish offer an eccentric pivot hole, on the end face of the right-hand member of second eccentric bushing and an inclined to one side side have an eccentric shaft, this eccentric shaft is placed in the described eccentric pivot hole, and be connected with the left end of described second pull bar, the second sliding shoe and second rotary disk are slidingly matched, position placed in the middle at the long side direction of this second sliding shoe is installed with a sliding shoe post, this sliding shoe post is towards described second eccentric bushing, and insert in second eccentric bushing, fixedly connected with second eccentric bushing, second rotary disk matches with the described second chute dish, workpiece helps seat to be fixed on second rotary disk, and towards described main eccentvic rotation mechanism.

More of the present utility model and in specific embodiment, described tailing axle is by second, the 3rd bearing is arranged on the described lathe tailstock rotationally, the left end of described second pull bar is threaded with described eccentric shaft, and being arranged with one, the right-hand member of second pull bar is used for protecting cover that described tailing axle axially extending bore is covered, and the right-hand member end at second pull bar is processed with second pull rod screw, being equipped with one on second pull rod screw is used for the protecting cover that described protecting cover stops is stopped nut, inserted an axle sleeve in described second eccentric bushing, and be equipped with a supporting dog screw on second eccentric bushing, the sliding shoe post of described the second sliding shoe inserts in the axle sleeve and by described supporting dog screw supporting and fixes.

In of the present utility model and then specific embodiment, the described second chute dish offers a pair of the 3rd dovetail chute on the card of a side of described second rotary disk, this remains on the same straight line with 180 ° of intervals on the card of the second chute dish each other to the 3rd dovetail chute; Described second rotary disk offers one the 4th dovetail chute on the card of a side of the described second chute dish, the 4th dovetail chute and described the 3rd dovetail chute form criss-cross position relation, on the card of a side of the second chute dish, also be extended with a pair of position and the corresponding second dovetail guide block of described the 3rd dovetail chute equally at second rotary disk, the second dovetail guide block is placed in described the 3rd dovetail chute, and described the second sliding shoe matches with the 4th dovetail chute.

Of the present utility model again more and in specific embodiment, the described second chute dish constitutes one second the piece of stepping down is installed on the card of a side of described second rotary disk, this second is installed the piece of stepping down and by second step down piece hold-down screw and the second chute dish are installed and are fixed.

In again of the present utility model and then specific embodiment, described workpiece helps seat to constitute a top in shape thimble towards an end of described main eccentvic rotation mechanism, and workpiece helps seat to constitute a mounting flange limit towards an end of described second rotary disk, and the central authorities of this mounting flange limit and second rotary disk are fixed.

The technical scheme that the utility model provides is because the main eccentvic rotation mechanism that has been connected on the lathe spindle of the body of lathe bed, and on lathe tailstock, be provided with an auxiliary eccentvic rotation mechanism, since main eccentvic rotation mechanism and auxiliary eccentvic rotation mechanism when motion all with the orbiting motion of ellipse, therefore can process oval cross section to shaft-like workpiece, and have the strong point that working (machining) efficiency is fast, machining accuracy is high and structure is terse and need not lathe is done excessive transformation.

Description of drawings

Fig. 1 is a specific embodiment structure chart of the present utility model.

Fig. 2 is the cutaway view after Fig. 1 assembling.

Fig. 3 is the structure chart of the second chute dish of auxiliary eccentvic rotation mechanism.

The specific embodiment

For the auditor that the makes Patent Office especially public can be expressly understood technical spirit of the present utility model and beneficial effect more, the applicant general elaborates in conjunction with the accompanying drawings in the mode of embodiment below, but to the description of embodiment all is not restriction to the utility model scheme, any according to the utility model design done only for pro forma but not substantial equivalent transformation all should be considered as the technical solution of the utility model category.

Ask for an interview Fig. 1 and Fig. 2, in Fig. 2, the applicant has illustrated at present the model widely used in the machining manufacturer body of lathe bed 1 as CA6140 type lathe, this body of lathe bed 1 has lathe spindle 11, headstock 12 and lathe tailstock 13, reason as known to the public, lathe spindle 11 is located on the headstock 12, and the actuating unit that is disposed by headstock 12 drives lathe spindle 11 motions.Lathe spindle 11 has a main shaft axially extending bore 111, that is to say, lathe spindle 11 is a hollow.End at lathe spindle 11 is that left end illustrated in figures 1 and 2 constitutes main shaft left side flange 112, and right-hand member constitutes the right flange 113 of a main shaft, and main shaft left and right flanges limit 112,113 obviously is used for for connecting main eccentvic rotation mechanism 2.By the signal of Fig. 2 as can be known, the main eccentvic rotation mechanism 2 of the shaft of elliptical cross-section class Work treatment installation that the utility model provides is fixedly connected on the lathe spindle 11, auxiliary eccentvic rotation mechanism 3 then is arranged on the lathe tailstock 13 rotationally, main eccentvic rotation mechanism 2 be used to clamp shaft-like workpiece 4 (Fig. 2 shows) and under the drive of lathe spindle 11 rotation the time take the movement locus motion of shaft-like workpiece 4 with ellipse, in like manner, auxiliary eccentvic rotation mechanism 3 is used for shaft-like workpiece 4 auxilliary holding and same movement locus motion with ellipse, main, auxiliary eccentvic rotation mechanism 2,3 remain on the same axis, and promptly both keep corresponding in the horizontal direction.

Emphasis is seen Fig. 1, the structure of the preferred main eccentvic rotation mechanism 2 of the shaft of elliptical cross-section class Work treatment installation of recommending as the utility model is as follows: comprise through a pull bar 21, the first chute dish 22, first eccentric bushing 23, first sliding shoe 24, first rotary disk 25 and workpiece dog plate 26, first pull bar 21 is furnished with a pair of clutch shaft bearing seat 212, each clutch shaft bearing seat 212 is located in the aforesaid main shaft axially extending bore 111, more particularly be positioned at the position, aperture of main shaft axially extending bore 111, each clutch shaft bearing seat 212 is furnished with a clutch shaft bearing 2121, first pull bar 21 is arranged on a pair of clutch shaft bearing 2121 rotationally, the left side of first pull bar 21, right-hand member all is stretched over outside the main shaft axially extending bore 111, promptly be stretched over outside the lathe spindle 11, wherein: the left end of first pull bar 21 is furnished with a draw-bar guide 211, middle part at the length direction of draw-bar guide 211 is fixed the left end of first pull bar 21 with nut 2111 with draw-bar guide 211, and the two ends of draw-bar guide 211 respectively are connected with connecting screw rod 2112 and aforesaid main shaft left side flange 112, and the right-hand member of first pull bar 21 is connected with following first eccentric bushing 23 that also will describe in detail.The left side of the first chute dish 22 is promptly fixed with the right flange 113 of one group of first hold-down screw 224 and the main shaft of aforesaid lathe spindle 11 towards a side of lathe spindle 11.Promptly on the card of a side of first rotary disk 25, offer a pair of first dovetail chute 222 at the first chute dish 22 on the card of a side of lathe spindle 11, should be to the first dovetail chute 222,180 ° of spaces on the discoidal first chute dish 22, so that keep corresponding in rectilinear direction, promptly a pair of first dovetail groove 222 is on the same straight line.By diagram as can be known, also offer an eccentric spindle nose hole 221 at the position placed in the middle of the first chute dish 22.In addition, but be able to conformability with the first chute dish 22 in order to ensure first rotary disk 25, be that both can realize installing, therefore constitute one and be used for first of the effect of stepping down the piece 223 of stepping down is installed on the card of the first chute dish 22 in the face of a side of first rotary disk 25, this first is installed the piece 223 of stepping down and by one group first step down piece hold-down screw 2231 and the first chute dish 22 is installed and is fixed.On the left end end face of first eccentric bushing 23 promptly on the end face of an end of the first chute dish 22 and an inclined to one side side extend and constitute an eccentric spindle nose 231, this off-centre spindle nose 231 has an eccentric shaft head thread hole 2311, first pull rod screw 213 with the right-hand member of first pull bar 21 after in eccentric spindle nose 231 is insinuated into aforesaid eccentric spindle nose hole 221 connects with eccentric shaft head thread hole 2311 screw threads, thereby first pull bar 21 is connected with first eccentric bushing 23.The shape of cross section of first sliding shoe 24 is trapezoidal, one end of the length direction of this first sliding shoe 24 and position placed in the middle are extended with sliding shoe axle 241, inserted a clutch shaft bearing in aforesaid first eccentric bushing 23 and overlapped for 232 (also can claim axle sleeve), after in sliding shoe axle 241 is inserted clutch shaft bearing cover 232, screw in the supporting screw hole 233 that defaults on first eccentric bushing 23 with supporting hold-down screw 2331, fixing by 2331 pairs of sliding shoe axles of supporting hold-down screw 241, avoid sliding shoe axle 241 to separate with first eccentric bushing 23.First rotary disk 25 offers one second dovetail chute 251 on the card of a side of the aforesaid first chute dish 22, and be extended with a pair of each other with 180 at interval the first dovetail guide blocks 252, aforesaid first sliding shoe 24 is placed in the second dovetail chute 251, and the first dovetail guide block 251 is placed in the aforesaid first dovetail chute 222.Because the first dovetail guide block 251 and first dovetail are with the particularity of the shape of chute 222, therefore with the first

dovetail guide block

251 and 222 assemblings of the first dovetail chute time, remove first earlier the piece 223 of stepping down is installed, the piece 223 of again first installation being stepped down after to be assembled the finishing returns and is fixed on the first chute dish 22.First rotary disk 25 is spaced apart on the card of a side of workpiece dog plate 26 to be provided with one group of workpiece dog plate fixing hole 253, workpiece dog plate 26 has a mounting flange 263, and is fixing by means of the aforesaid workpiece dog plate fixing hole 253 and first rotary disk 25 with one group of workpiece dog plate hold-down screw 2631.Having one group on the workpiece dog plate 26 is that quantity is three and each other with the claw 261 (also can claim jaw) at 120 ° of intervals, and the moving of each jaw 261 (scold out each other or close up) realized by the operating nut 262 that plays the key effect.Because workpiece dog plate 26 belongs to known technology, so the applicant thinks and there is no need to do excessive explanation.

Ask for an interview Fig. 3 and continue that emphasis is seen Fig. 1 and in conjunction with Fig. 2, being used for the preferred construction of the supporting auxiliary eccentvic rotation mechanism 3 of aforesaid main eccentvic rotation mechanism 2 of the shaft of elliptical cross-section class Work treatment installation of recommending as the utility model is as follows: comprise tailing axle 31, second pull bar 32, the second chute dish 33, second eccentric bushing 34, the second sliding shoe 35, second rotary disk 36 and workpiece are helped seat 37, tailing axle 31 is by second, the 3rd bearing 312,313 and be bearing in rotationally on the lathe tailstock 13, tailing axle 31 has a tailing axle axially extending bore 311, that is to say, tailing axle 31 is hollow shafts, and preferred scheme also can be provided with axle sleeve 314 outside tailing axle 31.The set-up mode of second pull bar 32 is similar to the set-up mode of first pull bar 21, more particularly, second pull bar 32 is arranged in the tailing axle axially extending bore 311 rotationally by the bearing block of being furnished with bearing equally, the two ends of second pull bar 32 are stretched over outside the tailing axle axially extending bore 311, the right-hand member of second pull bar 32 is arranged with a protecting cover 322, play bridging effect by protecting cover 322 to tailing axle axially extending bore 311, for spacing to protecting cover 322, be processed with second screw flight 321 in the right-hand member end of second pull bar 32, and on second screw flight 321, set protecting cover and stop nut 3211.By shown in Figure 3, the shape of the second chute dish 33 and structure are identical with the first chute dish 22, on the card of a side of second rotary disk 36, offer a pair of each other with 180 ° of the 3rd dovetail chutes 332 separately at this second chute dish 33, and the central authorities at the second chute dish 33 offer an eccentric pivot hole 331, in addition, on the second chute dish 33, constitute one second the piece 333 of stepping down is installed, this second is installed the piece 333 of stepping down by one group second the piece hold-down screw 3331 of stepping down to be installed fixing with the second chute dish 33, and second that the effect of the piece 333 of stepping down and aforesaid first installation piece 223 of stepping down is installed is identical.The structure of second eccentric bushing 34 and effect duplicate in first eccentric bushing 23, on the end face of the right-hand member of second eccentric bushing 34 and an inclined to one side side extend and constitute an eccentric shaft 341 (also can claim eccentric head), eccentric shaft 341 has the screw thread of connecting 3411, after in eccentric shaft 341 is placed in by the eccentric pivot hole 331 of Fig. 2 signal, with the screw thread of the left end of second push rod 32 and connect screw thread 3411 and connect.The shape of the second sliding shoe 35 and effect are as first sliding shoe 24, after the sliding shoe post 351 at the position placed in the middle of a side of the length direction of the second sliding shoe 35 is presented in the axle sleeve 342 that is located in second eccentric bushing 34, fixing with 343 supportings of supporting dog screw, escape in second eccentric bushing 34 to avoid sliding shoe post 351.The structure of second rotary disk 36 is identical with first rotary disk 25, on the card of a side of the second chute dish 33, offer one the 4th dovetail chute 361 at this second rotary disk 36, and on the card of this side, also constitute a pair of second apart 180 ° dovetail guide block 362, aforesaid the second sliding shoe 35 (it is trapezoidal that shape of cross section is) is placed in the 4th dovetail chute 361, and a pair of second dovetail guide block 362 is placed in aforesaid the 3rd dovetail chute 332.According to first reason that the description of the piece 223 of stepping down is installed, insert the 3rd dovetail chute 332 easily in order to make a pair of second dovetail guide block 362, therefore withdraw second earlier the piece 333 of stepping down is installed, treat that the second dovetail guide block 362 and the 3rd dovetail chute 332 assemble to return after finishing to be fixed on the second chute dish 33 again.It is one comparatively sharp keen so that reduce the top in shape thimble 371 of resistance that workpiece helps seat 37 to be formed with towards an end of the workpiece dog plate 26 of aforesaid main eccentvic rotation mechanism 2, and workpiece helps seat 37 ends towards second rotary disk 36 to constitute the mounting flange limit 372 that an expansion is established, and is with one group of second hold-down screw 3721 that the mounting flange limit 372 and second rotary disk 36 is fixing.

The applicant describes operation principle of the present utility model in conjunction with Fig. 1 and Fig. 2, shaft-like workpiece to be processed 4 is clamped on the workpiece dog plate 26, promptly the one end left end as shown in Figure 2 of shaft-like workpiece 4 is clamped by three claws on the workpiece dog plate 26, and the central authorities of the right-hand member end face of shaft-like workpiece 4 with drift or similarly device a pit 41 is set so that make the workpiece of auxiliary eccentvic rotation mechanism 3 help the sharp keen end of 37 top in shape thimble 371 to insert.When lathe tailstock 13 when the direction of main eccentvic rotation mechanism 2 promptly is moved to the left, cooperate 2 pairs of shaft-like workpieces of main eccentvic rotation mechanisms, 4 location by auxiliary eccentvic rotation mechanism 3.The headstock 12 of the body of lathe bed 1 in running order down and order about by power under the state of lathe spindle 11 rotations, because main eccentvic rotation mechanism 2 is connected with lathe spindle 11, therefore drive first chute dish 22 rotations fixing by lathe spindle 11 with it, match with first rotary disk 25 owing to the first chute dish 22 again, also because workpiece dog plate 26 is fixing with first rotary disk 25, so workpiece dog plate 26 is taken shaft-like workpiece 4 and is rotated.Meanwhile, under the effect of first eccentric bushing 23 that is connected with first pull bar 21, drive first sliding shoe 24, because first sliding shoe 24 matches with the second dovetail chute 251 of first rotary disk 25, the rotation of first rotary disk 25 is shown as with elliptical orbit moves, be installed in shaft-like workpiece 4 on the workpiece dog plate 26 with the orbiting motion of ellipse,, make shaft-like workpiece 4 form cross sections and be oval workpiece shaft-like workpiece 4 turning by the lathe tool of lathe.In said process, the main eccentvic rotation mechanism 2 of auxiliary eccentvic rotation mechanism 3 cooperations shows the orbiting motion with ellipse too.

Claims

1. shaft of elliptical cross-section class Work treatment installation that is disposed on the lathe, described lathe comprises having lathe spindle (11), the body of lathe bed (1) of headstock (12) and lathe tailstock (13), vehicle body main shaft (11) is located on the headstock (12), and this lathe spindle (11) has a main shaft axially extending bore (111), it is characterized in that described shaft of elliptical cross-section class Work treatment installation comprises that one is used to clamp workpiece and takes workpiece when rotated be used for being clipped on auxiliary eccentvic rotation mechanism (3) that workpiece on the main eccentvic rotation mechanism (2) is seized on both sides by the arms and that rotate with the movement locus of ellipse equally when rotated with the main eccentvic rotation mechanism (2) and of the movement locus of ellipse rotation, main eccentvic rotation mechanism (2) is connected with described lathe spindle (11), and auxiliary eccentvic rotation mechanism (3) is arranged on the described lathe tailstock (13) rotationally, and remains on the same axis with main eccentvic rotation mechanism (2).

2. the shaft of elliptical cross-section class Work treatment installation that is disposed on the lathe according to claim 1, it is characterized in that described main eccentvic rotation mechanism (2) comprises first pull bar (21), the first chute dish (22), first eccentric bushing (23), first sliding shoe (24), first rotary disk (25) and workpiece dog plate (26), first pull bar (21) is arranged in the main shaft axially extending bore (111) of described lathe spindle (11) rotationally, and the left side of this first pull bar (21), right-hand member all is stretched over outside the main shaft axially extending bore (111), wherein, the left end of first pull bar (21) is fixedlyed connected with the left end of lathe spindle (11), the first chute dish (22) is fixedlyed connected with the right-hand member of lathe spindle (11), central authorities at the first chute dish (22) offer an eccentric spindle nose hole (221), on the end face of the left end of first eccentric bushing (23) and an inclined to one side side have an eccentric spindle nose (231), this off-centre spindle nose (231) is placed in the described eccentric spindle nose hole (221), and be connected with the right-hand member of described first pull bar (21), first sliding shoe (24) is slidingly matched with first rotary disk (25), position placed in the middle at the long side direction of this first sliding shoe (24) is installed with a sliding shoe axle (241), this sliding shoe axle (241) is towards described first eccentric bushing (23), and be inserted in first eccentric bushing (23) and fixedly connected with first eccentric bushing (23), first rotary disk (25) matches with the described first chute dish (22), and workpiece dog plate (26) is fixing with first rotary disk (25).

3. the shaft of elliptical cross-section class Work treatment installation that is disposed on the lathe according to claim 2, it is characterized in that described first pull bar (21) has a pair of clutch shaft bearing seat (212), this is arranged in the described main shaft axially extending bore (111) clutch shaft bearing seat (212), and on each clutch shaft bearing seat (212), respectively be provided with clutch shaft bearing (2121), first pull bar (21) is arranged on a pair of clutch shaft bearing (2121) rotationally, wherein: the left end of first pull bar (21) is fixedlyed connected with the left end of described lathe spindle (11) by draw-bar guide (211), and the right-hand member of first pull bar (21) is processed with first pull rod screw (213), described eccentric spindle nose (231) has an eccentric shaft head thread hole (2311), described first pull rod screw (213) connects with eccentric shaft head thread hole (2311) screw thread, inserted a bearing holder (housing, cover) (232) in described first eccentric bushing (23), and on first eccentric bushing (23), offer a supporting screw hole (233), be equipped with a supporting hold-down screw (2331) on the supporting screw hole (233), the sliding shoe axle (241) of described first sliding shoe (24) is inserted in the described bearing holder (housing, cover) (232) and by described supporting hold-down screw (2331) supporting and fixes.

4. the shaft of elliptical cross-section class Work treatment installation that is disposed on the lathe according to claim 2, it is characterized in that the described first chute dish (22) is offering a pair of first dovetail chute (222) on the card of a side of described first rotary disk (25), this remains on the same straight line with 180 ° of intervals on the card of the first chute dish (22) each other to the first dovetail chute (222); Described first rotary disk (25) is offered one second dovetail chute (251) on the card of a side of the described first chute dish (22), this second dovetail chute (251) constitutes cross position relation with the described a pair of first dovetail chute (222), on the card of a side of the described first chute dish (22), also be extended with a pair of position and the corresponding first dovetail guide block (252) of the described first dovetail chute (222) equally at first rotary disk (25), the first dovetail guide block (252) is placed in the described first dovetail chute (222), and described first sliding shoe (24) matches with the second dovetail chute (251).

5. according to claim 2 or the 4 described shaft of elliptical cross-section class Work treatment installations that are disposed on the lathe, it is characterized in that constituting one first at the described first chute dish (22) on the card of a side of described first rotary disk (25) installs the piece (223) of stepping down, this first is installed the piece (223) of stepping down by first the piece hold-down screw (2231) of stepping down to be installed fixing with the first chute dish (22).

6. the shaft of elliptical cross-section class Work treatment installation that is disposed on the lathe according to claim 1, it is characterized in that described auxiliary eccentvic rotation mechanism (3) comprises tailing axle (31), second pull bar (32), the second chute dish (33), second eccentric bushing (34), the second sliding shoe (35), second rotary disk (36) and workpiece are helped seat (37), tailing axle (31) is arranged on the described lathe tailstock (13) rotationally, this tailing axle (31) has a tailing axle axially extending bore (311), second pull bar (32) is arranged in the tailing axle axially extending bore (311) rotationally, and the left side of this second pull bar (32), right-hand member all is stretched over outside the tailing axle axially extending bore (311), the second chute dish (33) is fixedlyed connected with the left end of tailing axle (31), central authorities at this second chute dish (33) offer an eccentric pivot hole (331), on the end face of the right-hand member of second eccentric bushing (34) and an inclined to one side side have an eccentric shaft (341), this eccentric shaft (341) is placed in the described eccentric pivot hole (331), and be connected with the left end of described second pull bar (32), the second sliding shoe (35) is slidingly matched with second rotary disk (36), position placed in the middle at the long side direction of this second sliding shoe (35) is installed with a sliding shoe post (351), this sliding shoe post (351) is towards described second eccentric bushing (34), and insert in second eccentric bushing (34), fixedly connected with second eccentric bushing (34), second rotary disk (36) matches with the described second chute dish (33), workpiece helps seat (37) to be fixed on second rotary disk (36), and towards described main eccentvic rotation mechanism (2).

7. the shaft of elliptical cross-section class Work treatment installation that is disposed on the lathe according to claim 6, it is characterized in that described tailing axle (31) is by second, the 3rd bearing (312,313) be arranged on rotationally on the described lathe tailstock (13), the left end of described second pull bar (32) is threaded with described eccentric shaft (341), and being arranged with one, the right-hand member of second pull bar (32) is used for protecting cover (322) that described tailing axle axially extending bore (311) is covered, and be processed with second pull rod screw (321) in the right-hand member end of second pull bar (32), being equipped with one on second pull rod screw (321) is used for the protecting cover that described protecting cover (322) stops is stopped nut (3211), inserted an axle sleeve (342) in described second eccentric bushing (34), and be equipped with a supporting dog screw (343) on second eccentric bushing (34), the sliding shoe post (351) of described the second sliding shoe (35) inserts in the axle sleeve (342) and by described supporting dog screw (343) supporting and fixes.

8. the shaft of elliptical cross-section class Work treatment installation that is disposed on the lathe according to claim 6, it is characterized in that the described second chute dish (33) offers a pair of the 3rd dovetail chute (332) on the card of a side of described second rotary disk (36), this remains on the same straight line with 180 ° of intervals on the card of the second chute dish (33) each other to the 3rd dovetail chute (332); Described second rotary disk (36) offers one the 4th dovetail chute (361) on the card of a side of the described second chute dish (33), the 4th dovetail chute (361) forms criss-cross position relation with described the 3rd dovetail chute (332), on the card of a side of the second chute dish (33), also be extended with a pair of position and the corresponding second dovetail guide block (362) of described the 3rd dovetail chute (332) equally at second rotary disk (36), the second dovetail guide block (362) is placed in described the 3rd dovetail chute (332), and described the second sliding shoe (35) matches with the 4th dovetail chute (361).

9. according to claim 6 or the 8 described shaft of elliptical cross-section class Work treatment installations that are disposed on the lathe, it is characterized in that the described second chute dish (33) constitutes one second the piece (333) of stepping down is installed on the card of a side of described second rotary disk (36), this second is installed the piece (333) of stepping down by second the piece hold-down screw (3331) of stepping down to be installed fixing with the second chute dish (331).

10. the shaft of elliptical cross-section class Work treatment installation that is disposed on the lathe according to claim 6, it is characterized in that described workpiece support seat (37) constitutes a top in shape thimble (371) towards an end of described main eccentvic rotation mechanism (2), and workpiece helps seat (37) to constitute a mounting flange limit (372) towards an end of described second rotary disk (36), and this mounting flange limit (372) is fixed with the central authorities of second rotary disk (36).