CN2344115Y

CN2344115Y - Piston mechanism for turning ellipse or variable ellipse

Info

Publication number: CN2344115Y
Application number: CN 98210688
Authority: CN
Inventors: 李品章
Original assignee: Individual
Current assignee: Individual
Priority date: 1998-02-09
Filing date: 1998-02-09
Publication date: 1999-10-20
Anticipated expiration: 2008-02-09

Abstract

The utility model relates to a piston mechanism for turning ellipses or variable ellipses, which comprises a bed body, a motor and two layers of trailing bars added on a saddle, wherein the slide guide of the trailing bar and the slide guide of the saddle are perpendicular mutually; an ellipse exploratory seat is arranged at the middle part of the saddle; a bevel gear is arranged on the lower end of a profiled shaft, and the bevel gear and a bevel gear arranged on a polished rod are in mesh; an elliptical explorator or an explorator for variable ellipses is arranged in the middle part of the profiled shaft and is in contact with an idler wheel arranged on the second-layer trailing bar to carry out friction transmission. When the utility model is used, work pieces rotate, a lathe tool changes feeding in radial direction according to the law of turning ellipses or variable ellipses, and the work pieces are turned into an elliptical shape or a shape of a variable ellipse. The utility model has the advantage of strong universality. Besides, the mechanism can be used as an engine lathe; the cost is a third of the cost of a numerically controlled lathe; the manufacture of the explorator is convenient.

Description

Turning ellipse or variable ellipse piston mechanism

The utility model relates to a kind of ellipse or variable ellipse piston mechanism of turning convexity tapering.

Piston is the heart of internal combustion engine, and the social demand amount is very big, and especially the cross section is ellipse or variable ellipse piston, and purposes is more extensive.But the difficulty of processing of variable ellipse piston is very big, and manufacturing process commonly used is to adopt three kinds of copying lathes (hard mould method), 240B lathe (pendulum-type knife rest), Digit Control Machine Tool (soft profile modeling method).Process the piston of different size shape with copying lathe, will dispose the hard mould of corresponding specification shape, if production lot after a little while, this method is very uneconomical; Pendulum-type knife rest lathe, the making of cutter and adjustment are all very difficult, and precision can not meet the drawing requirement fully, and cost is also higher; Numerically controlled lathe, though more satisfactory, join linear electric motors, this motor needs dependence on import, and the equipment manufacturing cost costliness is hung back many manufacturers.For solving the difficult problem of piston processing, the patent of various turning machines is arisen at the historic moment.The patent No. is " 97203341 "." fixed shaft type automatic turning oval piston equipment ", it also belongs to a kind of pendulum-type knife rest lathe, this technology has solved the big problem of variable ellipse piston difficulty of processing, but also keep away the unavoidable general ubiquitous common fault of pendulum-type knife rest lathe, the oval workpiece accuracy of i.e. change after the processing can not meet the drawing requirement fully, the cutter manufacture difficulty is big, and processed specification of workpieces is narrower or the like.

The purpose of this utility model is at the defective of above-mentioned prior art and deficiency, ad hoc this mechanism that counted, and it and engine lathe combine just can realize the shapes such as change ellipse of all size kind piston.

Task of the present utility model is achieved in that this turning ellipse or variable ellipse piston mechanism, it has a body, compositions such as motor, the planker that knife rest is housed fixes by planker seat and following one deck planker, on the main shaft of bed body and polished rod, intermeshing driving gear set is housed, on saddle, also increase and adorn two layers of planker, the cunning of planker is led and is led perpendicular with the cunning of saddle, all match between the planker and between planker and the saddle with dovetail groove, at the middle part of saddle the pattern seat is housed, Ellipse explorator is equipped with at the profiled shaft middle part of this pattern seat, it be installed in second layer planker on the roller axle on roller contact, the periphery of roller is wedge angle, bevel gear is equipped with in the lower end of profiled shaft, and it is meshed with bevel gear on the polished rod, and polished rod rotates, the drive Ellipse explorator rotates, thereby make the roller rotation, second planker is produced move forward and backward, then workpiece just is lathed ellipse; If load onto contact in the bearing lower end of ground floor planker front end, this contact contacts with the concave surface of concave backup plate on being installed in lathe front end gusset, and make move left and right along concave surface, because when the drive lathe tool of ground floor planker is made the axial feed of variation, make the workpiece axial surface become the drum type of convexity, be processed into the cydariform ellipse; When being contained in after Ellipse explorator on the profiled shaft changes into the change Ellipse explorator, and load onto gear in the upper end of profiled shaft, it is meshed with the gear that is installed in roller axle upper end by idler gear, roller axle and gear are to be threaded, the upper end of gear by backguy be suspended on heavily hanging down of a body one side and link to each other, roller is axially gone up and is promoted during the gear rotation, meanwhile pull wire coil is got up, heavily hang down and also upwards promote, when gear and idler gear break away from, because the heavily gravity effect of hanging down, backguy makes the gear opposite spin make the axially following landing homing of roller, roller is with one lifting of roller axle, and is different with the instantaneous ovality in contact position that becomes Ellipse explorator, makes workpiece become the similar change elliptical shape of ellipse mould like this.

The utility model cost is low, just 1/3 of the Digit Control Machine Tool price, highly versatile, ellipse, cydariform ellipse and variable ellipse piston that can not only the car different shape, and, just can make engine lathe and use as long as one group of gear train on bed body main shaft and the polished rod is separated.

Below in conjunction with accompanying drawing the utility model is further described.

Fig. 1 is the utility model structural representation.

Fig. 2 is the utility model structure assembly drawing.

Shown in the accompanying drawing, the utility model is made up of engine lathe bed body and power source motor, intermeshing driving gear set 8 is housed on bed body front-end of spindle and polished rod 18, the 4th layer of planker 15 that knife rest 6 is housed fixes by planker seat 9 usefulness screws and the 3rd layer of planker 4, increase on the saddle 1 below the 3rd layer of planker 4 and adorn two layers of

planker

2,3, between ground floor planker 2 and the saddle, between ground floor planker 2 and the second layer planker 3, all match between second layer planker 3 and the 3rd layer of planker 4 with dovetail groove, the chute of the chute of planker and saddle 1 is perpendicular, a pattern seat 23 is contained in the hole at saddle 1 middle part, bevel gear 20 is equipped with in the lower end of the profiled shaft 22 in the pattern seat 23, it is meshed with bevel gear 19 on the polished rod 18, Ellipse explorator 21 is equipped with at the middle part of profiled shaft 22, it contacts with roller 11 on being installed in second layer planker 3, and carry out frictional drive, the circumferential edge of roller 11 is wedge angle, because at second layer planker 3 and be installed between the plate washer 15 of lathe front end spring 17 is housed, roller 11 can closely be contacted with Ellipse explorator 21, when main axis rotation, make driving gear set 8 rotations, polished rod 18 rotates thereupon, by

bevel gear

19,20 rotate Ellipse explorator 21, the difference that the length diameter of axle is arranged because of Ellipse explorator 21, roller 11 is made a concession, because roller 11 is fixed on the second layer planker 3, so planker 3 is led to produce in the dovetail groove cunning of ground floor planker 2 and is moved forward and backward, just make radially advancing to cheat and changing of lathe tool, the feed variation of radially pressing oval rule with lathe tool is moved in the circle transhipment of workpiece 7, just be equivalent to headstock doing the elliptical orbit motion, make workpiece 7 become ellipse.

Contact 12 is equipped with in the lower end that is installed in the bearing 13 of ground floor planker 2 front ends, contact 12 contacts with the concave surface of concave backup plate 14 on being installed in gusset 16 under spring action, like this when above-mentioned headstock does to be equivalent to the elliptical orbit motion, touching folder 12 before the ground floor planker 2 is made move left and right along concave backup plate 14, then lathe tool is made the axial feed of variation, make the workpiece axial surface become the drum type of convexity, workpiece is processed to the cydariform ellipse.

If the Ellipse explorator 21 that is installed in profiled shaft 22 middle parts change into change Ellipse explorator 21 ', screw a screwed gear at the top of this profiled shaft 22 thread segment, and this gear is meshed with the gear 10 that is installed in roller axle 25 upper ends by idler gear, being suspended on heavily hanging down of a body one side 26 is connected with gear 10 by backguy, during polished rod 18 rotations, change Ellipse explorator 21 ' and profiled shaft 22 upper end gears rotations, driven gear 10 rotations, therefore the roller axle 25 that screws with it just upwards rises, roller 11 also makes progress thereupon, meanwhile, heavily vertical 26 backguy is rolled around gear, make heavily and to carry on hanging down, since roller 11 with become Ellipse explorator 21 ' the instantaneous ellipse in contact position different, make lathe tool when axial feed changes, radial feed also constantly changes, and makes workpiece 7 also become Ellipse explorator 21 ' similar change elliptical shape.When finishing piston and become ellipse and need length, manipulation is installed in the screw rod 24 of second layer planker 3 one end downsides, planker 3 preceding springs 17 are compressed, gear 10 breaks away from engagement with idler gear, at this moment under 26 the gravity effect of heavily hanging down, backguy resets, and gear 10 is produced reverse, roller axle 25 descends, and roller 11 also descends thereupon and resets.And so forth, workpiece is lathed and becomes the elliptical shape piston.

When driving gear set 8 stopped operating, lathe still can be made engine lathe and use.

Claims

1, a kind of turning ellipse or variable ellipse piston mechanism, it has a body, compositions such as motor, the planker (5) that knife rest (6) are housed fixes by planker seat (9) and following one deck planker (4), it is characterized in that on a body main shaft and the polished rod (18) intermeshing driving gear set (8) being housed, also increase below the planker (4) on saddle (1) and adorned planker (2) and planker (3), the cunning of planker is led and is led perpendicular with the cunning of saddle (1), all match between the planker and between planker (2) and the saddle (1) with dovetail groove, at the middle part of saddle (1) pattern seat (23) is housed, at the middle part of profiled shaft (22) Ellipse explorator (21) is housed, it be installed in the roller (11) that planker (3) goes up on the roller axle (25) and contact, bevel gear is equipped with in the lower end of profiled shaft (22), and it is meshed with bevel gear (19) on being contained in polished rod (18).

2, turning ellipse according to claim 1 or variable ellipse piston mechanism, it is characterized in that being placed on saddle (1) goes up the front end of ground floor planker (2) and fixes a bearing (13), contact (12) is equipped with in the lower end of bearing (13), and this contact (12) contacts with the concave surface of concave backup plate (14) on being installed in lathe front end gusset (16).

3, according to claim 1,2 described turning ellipse or variable ellipse piston mechanisms, it is characterized in that the Ellipse explorator (21) that is contained in profiled shaft (22) middle part is changed into change Ellipse explorator (21 '), gear is loaded onto in the upper end of profiled shaft (22), it is meshed with the gear (10) that is installed in roller axle (25) upper end by idler gear, gear (10) screws mutually with the thread segment of roller axle (25) upper end, and heavily hang down (26) that are suspended on a body one side link to each other with gear (10) by backguy.