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

Abstract

The utility model relates to a processing device for an ellipse-section shaft workpiece arranged on a lathe, which belongs to a mechanical processing device. The lathe includes a lathe bed with a lathe main shaft, a headstock and a lathe tailstock, the body main shaft is arranged on the headstock, and the lathe main shaft has a main shaft axial through hole, and the shaft workpiece with an elliptical cross-section is processed The device includes a main eccentric rotary mechanism for clamping the workpiece and rotating the workpiece in an elliptical motion track when rotating, and a main eccentric rotary mechanism for clamping the workpiece mounted on the main eccentric rotary mechanism and also rotating in an elliptical motion. Auxiliary eccentric turning mechanism that rotates on motion track, the main eccentric turning mechanism is connected with the lathe main shaft, and the auxiliary eccentric turning mechanism is rotatably arranged on the lathe tailstock and kept on the same axis as the main eccentric turning mechanism. It can process elliptical cross-sections for shaft workpieces, and has the advantages of fast processing efficiency, high processing accuracy, simple structure and no need for excessive modification of lathes.

Description

A processing device for an ellipse-section shaft workpiece configured on a lathe

technical field

The utility model belongs to the technical field of mechanical processing devices, in particular to a processing device for an ellipse-section shaft workpiece arranged on a lathe. the

Background technique

The reason why shaft parts with elliptical cross-sections are widely used in mechanical equipment is that the shaft-hole connections and fits with elliptical cross-sections can show extreme connection reliability. As we all know, in the case of large transmission power, if a flat key or spline is used to implement the hole shaft connection, the keyway will weaken the strength of the hole shaft, reduce the ability of the hole shaft parts to withstand torque, and affect the reliability of the connection , while the processing of spline holes and shafts is poor. Therefore, the implementation of the hole-shaft connection by using the shaft workpiece with an elliptical cross-section can make up for the weakness of the aforementioned spline or flat key connection. However, the processing accuracy requirements of elliptical section shaft parts are extremely strict, and the low processing efficiency is well known and recognized in the industry. the

In the prior art, profiling cutting, numerical control machining and laser cutting are mainly used to process shaft parts with elliptical cross-section. The machining accuracy and efficiency of profiling cutting are not ideal; although CNC machining and laser cutting can make up for the lack of profiling, the investment in equipment is large. the

In the published Chinese patent literature, there is rare technical information about the processing device for shaft workpieces with elliptical cross-sections. The utility model patent authorization announcement number CN2180368Y recommends a processing device for non-circular cross-section workpieces. Although this technical solution has its specification on page 2 27-29 line described technical effect, but the structure is very complicated. the

Contents of the invention

The task of the utility model is to provide a processing device for an ellipse-section shaft workpiece arranged on a lathe, which is helpful for improving processing efficiency, ensuring processing accuracy, and simplifying the structure so as to reduce investment costs. the

The task of the present utility model is accomplished in this way, a kind of ellipse cross-section axle workpiece processing device that is arranged on lathe, described lathe comprises the lathe bed that has lathe main shaft, headstock and lathe tailstock, and vehicle body main shaft is equipped with On the bedside box, and the lathe spindle has a spindle axial through hole, the elliptical cross-section shaft workpiece processing device includes a main eccentric rotary for clamping the workpiece and rotating the workpiece with an elliptical motion track when rotating mechanism and an auxiliary eccentric turning mechanism that is used to hold the workpiece clamped on the main eccentric turning mechanism and also rotates with an elliptical motion track when rotating, the main eccentric turning mechanism is connected with the lathe spindle, and the auxiliary eccentric turning mechanism The mechanism is rotatably arranged on the lathe tailstock, and is kept on the same axis as the main eccentric turning mechanism. the

In a specific embodiment of the present utility model, the main eccentric rotary mechanism includes a first pull rod, a first chute plate, a first eccentric sleeve, a first sliding block, a first rotary plate and a workpiece jaw plate, The first pull rod is rotatably arranged in the spindle axial through hole of the lathe spindle, and the left and right ends of the first pull rod extend out of the spindle axial through hole, wherein the left end of the first pull rod is connected to the left end of the lathe spindle Fixed connection, the first chute plate is fixedly connected with the right end of the lathe spindle, an eccentric shaft head hole is opened in the center of the first chute plate, and an eccentric shaft head is provided on the end surface of the left end of the first eccentric sleeve and on one side. The eccentric shaft head is placed in the eccentric shaft head hole, and is connected with the right end of the first pull rod. The first sliding block is slidably fitted with the first rotary disk. A sliding block shaft is fixed in the center, and the sliding block shaft faces the first eccentric sleeve, and is inserted into the first eccentric sleeve and fixedly connected with the first eccentric sleeve. The first rotary disc and the first chute The disc is matched, and the workpiece jaw disc is fixed with the first rotary disc. the

In another specific embodiment of the present invention, the first pull rod has a pair of first bearing seats, the pair of first bearing seats are arranged in the axial through hole of the main shaft, and each first The bearing seats are respectively provided with first bearings, and the first pull rods are rotatably arranged on a pair of first bearings, wherein: the left end of the first pull rod is fixedly connected with the left end of the lathe main shaft through a pull rod plate, and the right end of the first pull rod The first tie rod thread is processed, the eccentric shaft head has a threaded hole of the eccentric shaft head, the first tie rod thread is matched with the threaded hole of the eccentric shaft head, a bearing sleeve is built in the first eccentric sleeve, And a supporting screw hole is provided on the first eccentric sleeve, and a supporting fixing screw is provided on the supporting screw hole. The sliding block shaft of the first sliding block is inserted into the bearing sleeve and is fixed by the supporting fixing screw. The support is fixed. the

In yet another specific embodiment of the present utility model, a pair of first dovetail chute is provided on the disk surface of the first chute disk facing the first rotary disk, and the pair of first dovetail chute The chutes are kept on the same straight line on the disk surface of the first chute disk with an interval of 180°; a second dovetail slide is provided on the disk surface of the first rotary disk facing the first chute disk. groove, the second dovetail chute and the pair of first dovetail chute form a cross-shaped positional relationship, and a pair of positions are extended on the disk surface of the first rotary disk also facing the side of the first chute disk The first dovetail guide block corresponding to the first dovetail chute, the first dovetail guide block is placed in the first dovetail chute, the first sliding block is matched with the second dovetail chute . the

In yet another specific embodiment of the present utility model, a first installation relief block is formed on the disk surface of the first chute disk facing the first rotary disk. The block is fixed with the first chute plate by the first mounting set screw and the first chute plate. the

In another specific embodiment of the present utility model, the auxiliary eccentric rotary mechanism includes a tail shaft, a second pull rod, a second chute plate, a second eccentric sleeve, a second sliding block, a second rotary plate and The workpiece support seat, the tail shaft is rotatably arranged on the lathe tailstock, the tail shaft has a tail shaft axial through hole, the second pull rod is rotatably arranged in the tail shaft axial through hole, and the second pull rod Both left and right ends of the tail shaft extend out of the axial through hole of the tail shaft. The second chute disk is fixedly connected with the left end of the tail shaft. An eccentric shaft hole is opened in the center of the second chute disk. The right end of the second eccentric sleeve There is an eccentric shaft on the end face and on one side. The eccentric shaft is placed in the eccentric shaft hole and connected to the left end of the second pull rod. The second sliding block is slidingly fitted with the second rotary disc. The middle part of the second sliding block in the longitudinal direction is fixed with a sliding block column, the sliding block column faces the second eccentric sleeve, and is inserted into the second eccentric sleeve, and is fixedly connected with the second eccentric sleeve. The rotary disc cooperates with the second chute disc, and the workpiece support seat is fixed on the second rotary disc and faces the main eccentric rotary mechanism.

In a further specific embodiment of the present utility model, the tail shaft is rotatably arranged on the lathe tailstock through the second and third bearings, and the left end of the second pull rod is connected to the The eccentric shaft is threaded, and the right end of the second pull rod is provided with a protective cover for shielding the axial through hole of the tail shaft, and the second pull rod thread is processed on the right end of the second pull rod. A cover blocking nut for blocking the cover is provided on the thread of the pull rod, a shaft sleeve is built into the second eccentric sleeve, and a supporting positioning screw is provided on the second eccentric sleeve. The sliding block column of the second sliding block is inserted into the shaft sleeve and is supported and fixed by the supporting set screw. the

In a further specific embodiment of the present utility model, a pair of third dovetail chute is opened on the disk surface of the second chute disk facing the second rotary disk, and the pair of third dovetail chute The grooves are kept on the same straight line with an interval of 180° on the disk surface of the second chute disk; a fourth dovetail chute is opened on the disk surface of the second rotary disk facing the second chute disk , the fourth dovetail chute and the third dovetail chute form a cross-shaped positional relationship, and a pair of positions extending from the disk surface of the second rotary disk also facing the second chute disk The second dovetail guide block corresponding to the third dovetail chute, the second dovetail guide block is placed in the third dovetail chute, and the second slide block cooperates with the fourth dovetail chute. the

In yet another specific embodiment of the present utility model, a second installation relief block is formed on the disk surface of the second chute disk facing the second rotary disk. The block is fixed with the second chute plate by the second mounting set screw and the second chute plate. the

In yet another specific embodiment of the present utility model, one end of the workpiece supporting seat facing the main eccentric rotary mechanism forms a gyro-shaped thimble, and one end of the workpiece supporting seat facing the second rotary disk forms a The fixed flange is fixed to the center of the second rotary disk. the

In the technical solution provided by the utility model, a main eccentric turning mechanism is fixedly connected to the lathe main shaft of the lathe bed, and an auxiliary eccentric turning mechanism is set on the lathe tailstock, since the main eccentric turning mechanism and the auxiliary eccentric turning mechanism are When moving, it moves on an elliptical trajectory, so it can process an elliptical cross-section for shaft workpieces, and has the advantages of fast processing efficiency, high processing accuracy, simple structure and no need for excessive modification of the lathe. the

Description of drawings

Fig. 1 is a structural diagram of a specific embodiment of the present utility model. the

Fig. 2 is a cross-sectional view of Fig. 1 after assembly. the

Fig. 3 is a structural diagram of the second chute disk of the auxiliary eccentric rotary mechanism. the

Detailed ways

In order to enable the examiners of the patent office, especially the public, to more clearly understand the technical essence and beneficial effects of the present utility model, the applicant will describe in detail below in conjunction with the accompanying drawings in the form of embodiments, but none of the descriptions of the embodiments is As for the limitation of the solution of the utility model, any equivalent transformation made according to the idea of the utility model is only in form but not in substance shall be regarded as the scope of the technical solution of the utility model. the

Please see Fig. 1 and Fig. 2, and in Fig. 2, the applicant has shown the lathe bed 1 of model CA6140 type lathe widely used in machining factory at present, and this lathe bed 1 has lathe main shaft 11, bedside box 12 and lathe tailstock 13, as the reason known to the public, the lathe main shaft 11 is located on the headstock 12, drives the lathe main shaft 11 motions by the power mechanism that the headstock 12 configures. The lathe spindle 11 has a spindle axial through hole 111 , that is to say, the lathe spindle 11 is hollow. One end of the lathe main shaft 11, i.e. the left end shown in Fig. Connect the main eccentric slewing mechanism 2. It can be seen from the schematic diagram of Fig. 2 that the main eccentric rotary mechanism 2 of the elliptical section shaft workpiece processing device provided by the present invention is fixedly connected on the lathe main shaft 11, and the auxiliary eccentric rotary mechanism 3 is rotatably arranged on the lathe tailstock 13, The main eccentric rotary mechanism 2 is used to clamp the shaft-type workpiece 4 (shown in Figure 2 ) and to move the shaft-type workpiece 4 in an elliptical motion track when rotating under the drive of the lathe spindle 11. Similarly, the auxiliary eccentric rotary mechanism 3 is used to The shaft workpiece 4 is supported and also moves in an elliptical trajectory, the main and auxiliary eccentric rotary mechanisms 2 and 3 are kept on the same axis, that is, the two keep corresponding in the horizontal direction. the

Emphasis is shown in Fig. 1, the structure of the preferred main eccentric rotary mechanism 2 as the ellipse cross-section shaft workpiece processing device that the utility model recommends is as follows: comprise via a pull bar 21, the first chute dish 22, the first eccentric sleeve 23, the first A sliding block 24, the first rotary disc 25 and the workpiece jaw disc 26, the first pull rod 21 is equipped with a pair of first bearing seats 212, and each first bearing seat 212 is located in the aforementioned spindle axial through hole 111, more specifically Generally speaking, it is located at the opening of the axial through hole 111 of the main shaft. Each first bearing seat 212 is equipped with a first bearing 2121. The first pull rod 21 is rotatably arranged on a pair of first bearings 2121. The left and right sides of the first pull rod 21 The right ends all extend outside the main shaft axial through hole 111, that is, outside the lathe main shaft 11, wherein: the left end of the first pull rod 21 is equipped with a pull rod plate 211, and the first pull rod plate 211 is used in the middle of the length direction of the pull rod plate 211. The left end of the rod 21 is fixed to the tie rod plate 211, and the two ends of the tie rod plate 211 are respectively connected with the aforementioned main shaft left flange 112 by connecting screw rods 2112, and the right end of the first tie rod 21 is connected to the first eccentric sleeve described in detail below. 23 connections. The left side of the first chute plate 22 , that is, the side facing the lathe spindle 11 is fixed to the right spindle flange 113 of the aforementioned lathe spindle 11 with a set of first fixing screws 224 . A pair of first dovetail chute 222 is opened on the disk surface of the side of the first chute disk 22 facing away from the lathe spindle 11, that is, the disk surface of the side facing the first rotary disk 25, and the pair of first dovetail chute 222 The disc-shaped first chute plates 22 are spaced 180° apart from each other so as to maintain correspondence in the straight line direction, that is, a pair of first dovetail slots 222 are on the same straight line. It can be seen from the figure that an eccentric shaft head hole 221 is defined in the center of the first chute plate 22 . In addition, in order to ensure that the first rotary disk 25 can be matched with the first chute disk 22, that is, the two can be installed, so on the disk surface of the first chute disk 22 facing the first rotary disk 25, A first installation relief block 223 is formed to play a role of relief, and the first installation relief block 223 is fixed to the first chute plate 22 by a set of first installation relief block fixing screws 2231 . On the left end face of the first eccentric sleeve 23, that is, towards the end face of one end of the first chute plate 22 and extending to one side to form an eccentric shaft head 231, the eccentric shaft head 231 has an eccentric shaft head threaded hole 2311. After the shaft head 231 penetrates into the aforementioned eccentric shaft head hole 221, the first pull rod thread 213 on the right end of the first pull rod 21 is threadedly matched with the eccentric shaft head threaded hole 2311, so that the first pull rod 21 and the first eccentric sleeve 23 connections. The cross-sectional shape of the first sliding block 24 is trapezoidal, one end of the lengthwise direction of the first sliding block 24 and a sliding block shaft 241 is extended in the middle part, and a first bearing sleeve 232 (also known as a first bearing sleeve 232) is embedded in the aforementioned first eccentric sleeve 23. It can be called a shaft sleeve), when the sliding block shaft 241 is placed in the first bearing sleeve 232, the supporting fixing screw 2331 is screwed into the supporting screw hole 233 preset on the first eccentric sleeve 23, and the supporting fixing screw 2331 is used to The sliding block shaft 241 is fixed to prevent the sliding block shaft 241 from being separated from the first eccentric sleeve 23 . A second dovetail chute 251 is provided on the disk surface of the first rotary disk 25 facing the first chute disk 22, and a pair of first dovetail guide blocks 252 spaced 180 from each other extend. A sliding block 24 is placed in the second dovetail chute 251 , and the first dovetail guide block 251 is placed in the aforementioned first dovetail chute 222 . Due to the particularity of the shapes of the first dovetail guide block 251 and the first dovetail follower chute 222, when assembling the first dovetail guide block 251 and the first dovetail chute 222, first remove the first installation relief block 223, After the assembly is completed, the first installation relief block 223 is returned and fixed on the first chute plate 22 . A group of workpiece jaw plate fixing holes 253 are spaced apart on the surface of the first rotary plate 25 facing the side of the workpiece jaw plate 26. The workpiece jaw plate 26 has a fixing flange 263, and a set of workpiece jaw plate fixing screws 2631 is fixed to the first rotary disk 25 by means of the aforementioned workpiece jaw disk fixing hole 253 . There is a group of jaws 261 (also known as jaws) that are three in number and spaced at 120° from each other on the workpiece jaw plate 26. Operation nut 262 is realized. Since the workpiece jaw disc 26 is known in the art, applicants do not feel that an undue description is necessary. the

Please see Fig. 3 and continue to focus on Fig. 1 and in conjunction with Fig. 2, as the preferred structure of the auxiliary eccentric rotary mechanism 3 supporting the aforementioned main eccentric rotary mechanism 2 as the elliptical section shaft workpiece processing device recommended by the utility model As follows: including the tail shaft 31, the second pull rod 32, the second chute plate 33, the second eccentric sleeve 34, the second sliding block 35, the second rotary disk 36 and the workpiece supporting seat 37, the tail shaft 31 passes through the second and the second Three bearings 312, 313 are rotatably supported on the lathe tailstock 13, and the tail shaft 31 has a tail shaft axial through hole 311, that is to say, the tail shaft 31 is a hollow shaft, and the preferred solution can also be outside the tail shaft 31 A bushing 314 is provided. The setting method of the second pull rod 32 is similar to that of the first pull rod 21. More specifically, the second pull rod 32 is also rotatably arranged in the axial through hole 311 of the tail shaft through a bearing seat equipped with a bearing. The two ends of the pull rod 32 extend outside the axial through hole 311 of the tail shaft, and the right end of the second pull rod 32 is provided with a protective cover 322, the protective cover 322 plays a role of shielding the axial through hole 311 of the tail shaft. The position is limited by the cover 322 , a second screw thread 321 is processed on the right end of the second pull rod 32 , and a cover stop nut 3211 is arranged on the second screw thread 321 . As shown in FIG. 3 , the shape and structure of the second chute disk 33 are the same as those of the first chute disk 22 . On the disk surface of the second chute disk 33 facing the second rotary disk 36 , a pair of chute disks 33 and 36 are provided. The third dovetail chute 332 at intervals of 180°, and an eccentric shaft hole 331 is provided in the center of the second chute plate 33, in addition, a second installation relief block 333 is formed on the second chute plate 33, the The second installation relief block 333 is fixed to the second chute plate 33 by a set of second installation relief block fixing screws 3331 , and the function of the second installation relief block 333 is the same as that of the aforementioned first installation relief block 223 . The structure and effect of the second eccentric sleeve 34 are similar to those of the first eccentric sleeve 23. An eccentric shaft 341 (also called an eccentric head) is formed on the end surface of the right end of the second eccentric sleeve 34 and extended to one side. The eccentric shaft 341 has Matching thread 3411, after the eccentric shaft 341 is placed in the eccentric shaft hole 331 shown in FIG. The shape and function of the second sliding block 35 are the same as that of the first sliding block 24. When the sliding block column 351 in the middle of one side of the length direction of the second sliding block 35 is inserted into the shaft sleeve arranged in the second eccentric sleeve 34 After 342, support and fix with the support positioning screw 343, so as to prevent the sliding block column 351 from escaping from the second eccentric sleeve 34. The structure of the second rotary disk 36 is the same as that of the first rotary disk 25. A fourth dovetail chute 361 is provided on the disk surface of the second rotary disk 36 facing the second chute disk 33, and a fourth dovetail chute 361 is provided on the disk surface of this side. A pair of second dovetail guide blocks 362 separated by 180° from each other are also formed on the top, the aforementioned second sliding block 35 (the shape of the cross section is trapezoidal) is placed in the fourth dovetail chute 361, and a pair of second dovetail guide blocks 362 is placed in the aforementioned third dovetail chute 332 . According to the description of the first installation relief block 223, in order to allow a pair of second dovetail guide blocks 362 to be inserted into the third dovetail chute 332 conveniently, the second installation relief block 333 is removed first, and the second dovetail After the guide block 362 is assembled with the third dovetail chute 332 , it is returned and fixed on the second chute plate 33 . The workpiece supporting seat 37 is formed with a relatively sharp gyro-shaped thimble 371 so as to reduce resistance toward one end of the workpiece jaw plate 26 of the aforementioned main eccentric rotary mechanism 2, and the workpiece supporting seat 37 is formed toward an end of the second rotary disk 36. An expanded fixed flange 372 is fixed to the second rotary disk 36 with a set of second fixing screws 3721 . the

The applicant describes the working principle of the utility model in conjunction with Fig. 1 and Fig. 2, and the shaft workpiece 4 to be processed is clamped on the workpiece jaw disc 26, that is, the shaft is clamped by the three jaws on the workpiece jaw disc 26. One end of the workpiece 4 is clamped by the left end as shown in Figure 2, and a pit 41 is set with a punch or similar device at the center of the right end face of the shaft workpiece 4, so that the workpiece supporting seat 37 of the auxiliary eccentric rotary mechanism 3 The sharp end of the gyro-shaped thimble 371 is inserted. When the lathe tailstock 13 moves to the left in the direction of the main eccentric turning mechanism 2 , the auxiliary eccentric turning mechanism 3 cooperates with the main eccentric turning mechanism 2 to position the shaft workpiece 4 . When the headstock 12 of the lathe bed 1 is in working condition and the lathe main shaft 11 is driven by power to rotate, since the main eccentric turning mechanism 2 is connected with the lathe main shaft 11, the lathe main shaft 11 drives the first one fixed thereto. The chute disk 22 rotates, and because the first chute disk 22 cooperates with the first rotary disk 25, and because the workpiece claw disk 26 is fixed to the first rotary disk 25, the workpiece claw disk 26 rotates with the shaft workpiece 4 . At the same time, the first sliding block 24 is driven under the action of the first eccentric sleeve 23 connected to the first pull rod 21. Since the first sliding block 24 is matched with the second dovetail chute 251 of the first rotary disk 25, the The rotation of the first rotary disk 25 can be shown as an elliptical trajectory movement, and the shaft workpiece 4 clamped on the workpiece jaw disk 26 moves with an elliptical trajectory, and the shaft workpiece 4 is turned by the turning tool of the lathe, so that the shaft The class workpiece 4 forms a workpiece with an elliptical cross-section. During the above process, the auxiliary eccentric turning mechanism 3 cooperates with the main eccentric turning mechanism 2 to also move on an elliptical trajectory. the

Claims (10)

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).

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