CN203636394U - Turning device for rough turning of camshaft - Google Patents

Abstract

The utility model discloses a turning device for the rough turning of a camshaft. The turning device includes two ejection pins, a connecting disc, a poking rod and a hoop clamp, wherein the hoop clamp includes a first hoop clamp piece and a second hoop clamp piece, one end of the first hoop clamp piece is hinged to one end of the second hoop clamp piece, a hollow cavity is formed in the hoop clamp and used for accommodating a cam of the camshaft, a union screw is connected between the two near ends of the first hoop clamp piece and the second hoop clamp piece on the same side surface, one end of the union screw is hinged to the first hoop clamp piece, and a knurled nut is screwed at the free end of the union screw; a locking plane is arranged on the outer side of the near end of the second hoop clamp piece, and used for enabling the union screw to lock the first hoop clamp piece and the second hoop clamp piece at the near ends through the knurled nut; a first overhanging arm is overhung outwardly at the near end of the first hoop clamp piece, a second overhanging arm is overhung outwardly at the near end of the second hoop clamp piece, and the cross section area of the first overhanging arm is larger than that of the second overhanging arm. The turning device provided by the utility model has the benefits of simple structure and convenience in operation, and can reduce the camshaft manufacture cost when being used for camshaft turning.

Description

For the rough turn truning fixture of camshaft

Technical field

The utility model relates to a kind of accessory turning fixture, particularly a kind of truning fixture for rough turn Motorcycle Cam axostylus axostyle portion cylindrical.

Background technology

Motorcycle camshaft is that a kind of cam portion and shaft portion form rigid unitary axial workpiece, axial workpiece turning processing adopts one end clamping conventionally, the installation way that the other end holds carries out, and its cylindricity to gripping section cylindrical and the axiality of gripping section and the section of holding are had relatively high expectations.Camshaft is rough turn is that the cylindrical section bar portion turning of camshaft is gone out to a cylindrical section with complete circle cylinder, for the machining benchmark of rear operation.Due to camshaft rough turn before, camshaft belongs to rough forging, therefore, this installation way is inadaptable for the rough turn operation of camshaft.Chinese patent notification number CN201389642Y, date of declaration on January 27th, 2010, invention and created name " fixture for camshaft turning ".It discloses a kind of fixture of camshaft turning processing, comprise the connection part being connected with lathe spindle and the clamping and positioning portion clamping for camshaft location, clamping and positioning portion comprises an eccentric cavity, eccentric cavity be fixedly connected with, eccentric cavity is used for driving camshaft synchronously to rotate with lathe spindle.Clamping and positioning portion is also provided with a flexible thimble, for camshaft is formed to holding of front end.This installation way can be advantageously used in the rough turn processing of camshaft, but because eccentric cavity is in stationary state, it is relative fixing with flexible thimble position, have relatively high expectations for camshaft centre bore and camshaft overhead cam outline relative position, high to the Working position requirement of semifinished product precision and centre bore, increase manufacturing cost.Otherwise, there will be centre bore when rough turn just holding not, after camshaft is rough turn, can not meet the defect of rear operation machining benchmark requirement, very easily cause rear operation percent defective to increase.For this reason, for this reason, need to improve.

Summary of the invention

The purpose of this utility model is exactly for the deficiencies in the prior art, provide a kind of simple in structure, camshaft convenient mounting and clamping, production efficiency high and use safety for the rough turn truning fixture of camshaft.

For achieving the above object, the utility model adopts following technical scheme.

A kind of for the rough turn truning fixture of camshaft, comprise two thimbles that hold for workpiece, the terminal pad being connected with lathe spindle, terminal pad is provided with driving lever, driving lever is contained in the folder of embracing of camshaft outside for sliding set, described armful of folder comprises first armful of folder lobe and second armful of folder lobe of two equal thickness, first armful of folder lobe and second armful of folder lobe are by two armfuls of distal end articulated of pressing from both sides lobe walls, between first armful of folder lobe and second armful of folder lobe, be formed with the cavity for holding blank state cam of camshaft position, between two near-ends of first armful of folder lobe and second armful folder lobe same side, be connected with loose joint screw rod, loose joint screw rod one end is hinged on first armful of folder lobe, loose joint screw axis is parallel to the corresponding side surface of described second armful of folder lobe, the free end of loose joint screw rod is screwed with knurled nut, on the same side of described first armful of folder lobe and second armful folder lobe, be formed with the perforation fluting for receiving described loose joint screw rod bar portion, the near-end outside of second armful of folder lobe is provided with locking plane, locking plane is locked first armful of folder lobe and second armful of folder lobe by described knurled nut for loose joint screw rod by near-end, locking plane parallel is in the faying face of first armful of folder lobe and second armful of folder lobe near-end, the near-end of described first armful of folder lobe and second armful folder lobe also outwards overhang respectively the first cantilever and the second cantilever, the cross-sectional area of the first cantilever is greater than the cross-sectional area of the second cantilever.

Adopt the utility model of aforementioned techniques scheme, when use, be located at two thimbles on lathe spindle and tailstock for realizing holding camshaft, the driving lever arranging on the terminal pad being fixedly connected with lathe spindle is embraced folder for stirring, embrace the mode of locking again after folder employing is embraced and realize first armful of locking of pressing from both sides lobe and second armful of folder lobe, wherein the first cantilever and the second cantilever, as the lever of embracing folder, adopt the mode of knurled nut's locking to lock, its reliable lock; Knurled nut's annular knurl dish forms operation handwheel, and it is easy to operate.The cam outside that is sliding type after the locking of first armful of folder lobe and second armful folder lobe and is sleeved on camshaft, turning adds man-hour, and driving lever is stirred and is embraced folder and rotate with lathe spindle by the first cantilever, embraces folder and drives camshaft synchronous rotary by its inner chamber.Therefore, the folder of embracing in the utility model does not form relative fixing with thimble position, can reduce semifinished product precision and the required precision of centre bore Working position of camshaft, reduce blank manufacturing cost, camshaft is only determined axial line by two ends centre bore, the requirement of operation machining benchmark after camshaft face of cylinder section after rough turn can fully meet, the rate of can effectively reducing the number of rejects and seconds, thus effectively reduce the manufacturing cost of camshaft.

Preferably, described first armful of folder lobe is provided with heavy stand, and heavy stand plane is positioned at the plane of loose joint screw rod one side lower than first armful of folder lobe, on heavy stand, be fixedly connected with pivoting support by screw, pivoting support top is formed with hinged fluting, and pivoting support has traversed hinging pin shaft by two cell walls of hinged fluting; The articulated joint matched in clearance of described loose joint screw rod is in described hinged fluting.Can make its compact conformation, reduce weight simultaneously, reduce unbalance dynamic factor.

Further preferred, described second armful of folder lobe distal side forms one and runs through the groove of radial thickness and the through hole of consistent break-through groove two side, is combined with jointed shaft in through hole; Described first armful of folder lobe distal side middle part forms a lug, and lug matched in clearance is in described groove, and first armful of folder lobe forms hinged by lug by described jointed shaft and second armful of folder lobe.To guarantee hinged reliable, compact conformation.

Further preferred, described driving lever outer end is provided with block plate, and block plate is positioned at described the first cantilever outer end.To prevent that embracing folder skids off to tail stock end, guarantees that the transmission of turning power is reliable.

The beneficial effects of the utility model are, simple in structure, easy to operate, during for camshaft turning, can reduce blank requirement and rear operation percent defective, thereby effectively reduce camshaft manufacturing cost.

Accompanying drawing explanation

Fig. 1 is the utility model structural representation.

Fig. 2 is that the C of the dismounting lathe main shaft end thimble 8 in the utility model Fig. 1 is to view.

Fig. 3 is the structural representation of embracing folder in the utility model.

Fig. 4 is the A-A revolved section expanded view in the utility model Fig. 3.

Fig. 5 is the upward view of the utility model Fig. 3.

Fig. 6 be in the utility model Fig. 3 B to partial view.

The specific embodiment

Below in conjunction with accompanying drawing, the utility model is further described, but therefore the utility model is not limited among described scope of embodiments.

Referring to Fig. 1, a kind of for the rough turn truning fixture of camshaft, comprise two thimbles 8 that hold for workpiece, the terminal pad 9 being connected with lathe spindle, terminal pad 9 is provided with driving lever 10, driving lever 10 is contained in the folder of embracing of camshaft outside for sliding set, driving lever 10 outer ends are provided with block plate 10a, and block plate 10a is positioned at described the first cantilever 11 outer ends.Described armful of folder comprises first armful of folder lobe 1 and second armful of folder lobe 2 of two equal thickness, first armful of folder lobe 1 and second armful of folder lobe 2 are by two armfuls of distal end articulated of pressing from both sides lobe walls, between first armful of folder lobe 1 and second armful of folder lobe 2, be formed with the cavity for holding blank state cam of camshaft position, between two near-ends of first armful of folder lobe 1 and second armful folder lobe 2 same side, be connected with loose joint screw rod 3, loose joint screw rod 3 one end are hinged on first armful of folder lobe 1, loose joint screw rod 3 axis are parallel to the corresponding side surface of described second armful of folder lobe 2, and the free end of loose joint screw rod 3 is screwed with knurled nut 7; On the same side of described first armful of folder lobe 1 and second armful of folder lobe 2, be formed with the perforation fluting for receiving described loose joint screw rod 3 bar portions, the near-end outside of second armful of folder lobe 2 is provided with locking plane 21, locking plane 21 is locked first armful of folder lobe 1 and second armful of folder lobe 2 by described knurled nut 7 for loose joint screw rod 3 by near-end, locking plane 21 is parallel to the faying face of first armful of folder lobe 1 and second armful of folder lobe 2 near-end; Also outwards overhang the respectively cross-sectional area of the first cantilever 11 and the second cantilever 22, the first cantilevers 11 of the near-end of described first armful of folder lobe 1 and second armful folder lobe 2 is greater than the cross-sectional area of the second cantilever 22.

Described first armful of folder lobe 1 is provided with heavy stand 12, heavy stand 12 planes are positioned at the plane of loose joint screw rod 3 one sides lower than first armful of folder lobe 1, on heavy stand 12, be fixedly connected with pivoting support 4 by screw, pivoting support 4 tops are formed with hinged fluting 41, and pivoting support 4 has traversed hinging pin shaft 5 by two cell walls of hinged fluting 41; The articulated joint matched in clearance of described loose joint screw rod 3 is in described hinged fluting 41.Described second armful of folder lobe 2 distal side form one and run through the groove 23 of radial thickness and the through hole of consistent break-through groove 23 two sides, are combined with jointed shaft 6 in through hole; Described first armful of folder lobe 1 distal side middle part forms a lug 13, and lug 13 matched in clearance are in described groove 23, and first armful of folder lobe 1 forms hinged by lug 13 by described jointed shaft 6 and second armful of folder lobe 2.

Although combine above accompanying drawing, embodiment of the present utility model is described, but those of ordinary skill in the art also can recognize making various variations or modification in the scope of claims, these modifications and variations are interpreted as within scope of the present utility model and intention.

Claims (4)

1. one kind for the rough turn truning fixture of camshaft, comprise two thimbles (8) that hold for workpiece, the terminal pad (9) being connected with lathe spindle, terminal pad (9) is provided with driving lever (10), driving lever (10) is contained in the folder of embracing of camshaft outside for sliding set, it is characterized in that, described armful of folder comprises first armful of folder lobe (1) and second armful of folder lobe (2) of two equal thickness, first armful of folder lobe (1) and second armful of folder lobe (2) are by the distal end articulated of two armfuls of folder lobe walls, between first armful of folder lobe (1) and second armful of folder lobe (2), be formed with the cavity for holding blank state cam of camshaft position, between two near-ends of first armful of folder lobe (1) and second armful of folder lobe (2) same side, be connected with loose joint screw rod (3), loose joint screw rod (3) one end is hinged on first armful of folder lobe (1), loose joint screw rod (3) axis is parallel to the corresponding side surface of described second armful of folder lobe (2), the free end of loose joint screw rod (3) is screwed with knurled nut (7), on the same side of described first armful of folder lobe (1) and second armful of folder lobe (2), be formed with the perforation fluting for receiving described loose joint screw rod (3) bar portion, the near-end outside of second armful of folder lobe (2) is provided with locking plane (21), locking plane (21) is locked first armful of folder lobe (1) and second armful of folder lobe (2) by described knurled nut (7) for loose joint screw rod (3) by near-end, locking plane (21) is parallel to the faying face of first armful of folder lobe (1) and second armful of folder lobe (2) near-end, described first armful of folder lobe (1) and second armful press from both sides near-end also outwards overhang respectively the first cantilever (11) and second cantilever (22) of lobe (2), and the cross-sectional area of the first cantilever (11) is greater than the cross-sectional area of the second cantilever (22).

2. according to claim 1 for the rough turn truning fixture of camshaft, it is characterized in that, described first armful of folder lobe (1) is provided with heavy stand (12), heavy stand (12) plane is positioned at the plane of loose joint screw rod (3) one sides lower than first armful of folder lobe (1), heavy stand (12) is upper is fixedly connected with pivoting support (4) by screw, pivoting support (4) top is formed with hinged fluting (41), and pivoting support (4) has traversed hinging pin shaft (5) by two cell walls of hinged fluting (41); The articulated joint matched in clearance of described loose joint screw rod (3) is in described hinged fluting (41).

3. according to claim 1 and 2 for the rough turn truning fixture of camshaft, it is characterized in that, described second armful of folder lobe (2) distal side forms one and runs through the groove (23) of radial thickness and the through hole of consistent break-through groove (23) two side, is combined with jointed shaft (6) in through hole; Described first armful of folder lobe (1) distal side middle part forms a lug (13), and lug (13) matched in clearance is in described groove (23), and first armful of folder lobe (1) forms hinged by lug (13) by described jointed shaft (6) and second armful of folder lobe (2).

4. according to claim 1 and 2ly it is characterized in that for the rough turn truning fixture of camshaft, described driving lever (10) outer end is provided with block plate (10a), and block plate (10a) is positioned at described the first cantilever (11) outer end.

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