CN201872019U

CN201872019U - Journal polishing device of gasoline engine crankshaft

Info

Publication number: CN201872019U
Application number: CN201020510216XU
Authority: CN
Inventors: 余洪; 蒋瑞元; 王安庆; 李家洪
Original assignee: Chongqing Meixin Mile Shafts Co Ltd
Current assignee: CHONGQING MEIXIN YINGSHEN MACHINERY CO., LTD.
Priority date: 2010-08-31
Filing date: 2010-08-31
Publication date: 2011-06-22
Anticipated expiration: 2020-08-31

Abstract

The utility model relates to a journal polishing device of a gasoline engine crankshaft, which is used for polishing and grinding a journal of the gasoline engine crankshaft. The device consists of an upper pressing arm, a lower pressing arm, a guide rail, a baffling bracket and a pneumatic cylinder, wherein the upper pressing arm is hinged with the lower pressing arm; the pneumatic cylinder is connected between the rear end of the upper pressing arm and the rear end of the lower pressing arm; the front end of the upper pressing arm and the front end of the lower pressing arm are respectively fixed with an upper pressing block and a lower pressing block; the upper surfaces of the upper pressing block and the lower pressing block are transversely provided with circular arc grooves; the surfaces of the circular arc grooves are provided with sand paper; and the upper pressing arm and the lower pressing arm are supported on the guide rail through rollers. The polishing device has a simple structure, can be installed on a common lathe, polish and grind the journal of the crankshaft, and process the quality-qualified crankshaft products; and the cost is low.

Description

The bent neck burnishing device of gasoline engine crank

Technical field

The utility model relates to a kind of device that is used for the bent neck of gasoline engine crank is carried out polishing grinding.

Background technology

In petrol engine, the bent neck of gasoline engine crank is connected with the chain bar, is slidingly matched between the two, do frequent relative motion at a high speed, this just requires the bent neck periphery of bent axle must have very low roughness, so add man-hour at bent axle, must carry out polishing grinding to bent neck.

Be used at present the bent neck polishing grinding of bent axle the polishing machine complex structure, cost an arm and a leg, and maintaining is comparatively bothersome, has increased the processing cost of gasoline engine crank.

Summary of the invention

The purpose of this utility model provides the bent neck burnishing device of a kind of gasoline engine crank simple in structure, and it is installed on the engine lathe, can carry out polishing grinding to the bent neck of bent axle.

The bent neck burnishing device of gasoline engine crank described in the utility model is by upper pressing arm, following pressure arm, guide rail, divider and pneumatic cylinder are formed, upper pressing arm be positioned at following pressure arm directly over, on, following pressure arm is hinged in the middle, pneumatic cylinder rear end and tailpiece of the piston rod thereof are hinged with upper pressing arm rear end and following pressure arm rear end respectively, the upper pressing arm front end reaches down, and the pressure arm front end is fixed with upper holder block and lower lock block respectively, laterally offer arc-shaped slot at the lower surface of upper holder block and the upper surface of lower lock block, the surface of arc-shaped slot is provided with sand paper, when last, following pressure arm front end is mutually near to minimum distance the time, on, the arc-shaped slot of lower lock block is vertically opposite, and its formed inner cylinder face is consistent with the external cylindrical surface radian of intending the bent neck of polishing gasoline engine crank; It is inverted U-shaped that divider is, and is vertically fixed on the guide rail by its two ends, on the following pressure arm roller is installed, and upper and lower pressure arm and is supported on the guide rail by roller between the divider both sides, can slide along guide rail.

This burnishing device is installed on the lathe by guide rail, and when burnishing device was not worked, pneumatic cylinder was in not starting state, piston rod does not stretch out in cylinder body, at this moment, the rear end of upper and lower pressure arm is close mutually to minimum distance, and the front end of upper and lower pressure arm then is separated from each other to ultimate range.

When the bent neck of bent axle is polished, a driving lever is installed on lathe spindle earlier, distance between driving lever and the lathe spindle axis should be less than the ultimate range between crankshaft center line and the crankshaft crank edge, and then crankshaft two end withstood between the top and tailstock centre of lathe spindle, and bent neck is positioned at, between two arc-shaped slots of lower lock block, start pneumatic cylinder, piston rod stretches out, make, the rear end of following pressure arm separately, go up simultaneously, the front end of following pressure arm closes up, with retort clamps tightly last, between two arc-shaped slots of lower lock block, start lathe, lathe spindle drives driving lever and rotates, and driving lever is then stirred crank makes whole bent axle around the rotation of lathe spindle axis, in this process, bent neck will drive, following pressure arm slides before and after guide rail, thereby make bent neck last, between two arc-shaped slots of lower lock block with respect to last, lower lock block rotates, and bent neck periphery is just with last, the sand paper high-speed friction on the arc-shaped slot surface of lower lock block, thus realize the polishing of bent neck.

The bent neck burnishing device of gasoline engine crank described in the utility model structure is very simple, thus with low cost, and can carry out polishing grinding to the bent neck of bent axle, process up-to-standard bent axle product.

Description of drawings

Now in conjunction with the accompanying drawings the utility model is described in further detail.

Fig. 1 looks schematic diagram for the master of the bent neck burnishing device of gasoline engine crank described in the utility model;

Fig. 2 is the left view of Fig. 1;

Fig. 3 is the front view of divider;

Fig. 4 is the left view of Fig. 3;

Fig. 5 is the front view of upper pressing arm;

Fig. 6 is the upward view of Fig. 5;

Fig. 7 is the front view of following pressure arm;

Fig. 8 is the vertical view of Fig. 7.

The specific embodiment

Extremely shown in Figure 8 as Fig. 1, the bent neck burnishing device of this gasoline engine crank is by upper pressing arm 5, following pressure arm 9, guide rail 10, divider 3 and pneumatic cylinder 2 are formed, upper pressing arm 5 be positioned at following pressure arm 9 directly over, be welded with hinged block 13 at upper pressing arm 5 middle part lower surfaces, hinged block 14 under pressure arm 9 middle part upper surfaces are welded with down, on upper pressing arm 5 passes through at the middle part with following pressure arm 9, following hinged

block

13,14 usefulness bolts 4 carry out hinged, pneumatic cylinder 2 rear ends and piston rod 1 end thereof are hinged with upper pressing arm 5 rear ends and following pressure arm 9 rear ends respectively, and pneumatic cylinder 2 is connected between upper pressing arm 5 rear ends and following pressure arm 9 ends.Upper pressing arm 5 front ends reach down, and pressure arm 9 front ends are fixed with upper holder block 6 and lower lock block 8 respectively, laterally offer arc-shaped slot 12 at the lower surface of upper holder block 6 and the upper surface of lower lock block 8, the surface of arc-shaped slot 12 is provided with sand paper 7, when upper and

lower pressure arm

5,9 front ends mutually near the time to minimum distance, the arc-shaped slot 12 of upper and lower briquetting 6,8 is vertically opposite, and its formed inner cylinder face is consistent with the external cylindrical surface radian of intending the bent neck of polishing gasoline engine crank.Divider 3 is inverted U-shaped, is vertically fixed on the both sides of guide rail 10 by its two ends, on the following pressure arm 9 roller 11 is installed, and upper and

lower pressure arm

5,9 and is supported on the guide rail 10 by roller 11 between divider 3 both sides, can slide along guide rail 10.

Claims

1. the bent neck burnishing device of gasoline engine crank, it is characterized in that: by upper pressing arm (5), following pressure arm (9), guide rail (10), divider (3) and pneumatic cylinder (2) are formed, upper pressing arm be positioned at following pressure arm directly over, on, following pressure arm is hinged in the middle, pneumatic cylinder rear end and piston rod thereof (1) end is hinged with upper pressing arm rear end and following pressure arm rear end respectively, the upper pressing arm front end reaches down, and the pressure arm front end is fixed with upper holder block (6) and lower lock block (8) respectively, laterally offer arc-shaped slot (12) at the lower surface of upper holder block and the upper surface of lower lock block, the surface of arc-shaped slot is provided with sand paper (7), when last, following pressure arm front end is mutually near to minimum distance the time, on, the arc-shaped slot of lower lock block is vertically opposite, and its formed inner cylinder face is consistent with the external cylindrical surface radian of intending the bent neck of polishing gasoline engine crank; It is inverted U-shaped that divider is, and is vertically fixed on the guide rail by its two ends, and roller (11) is installed on the following pressure arm, and upper and lower pressure arm and is supported on the guide rail by roller between the divider both sides, can slide along guide rail.