Four curve low impact high speed lifting mechanism
Technical field:
The present invention relates to a kind of lifting mechanism, particularly a kind of four curve low impact high speed lifting mechanism mainly is lifting the revolution supporting plate on the high-speed machining center lathe that is used in the machining industry.
Background technology:
Existing high speed machine machining center lathe is when carrying out machined to workpiece, its workpiece is to be fixed on the anchor clamps, anchor clamps and horizontally disposed supporting plate are fixedly connected, the supporting plate bearings is on lathe bed and with respect to the lathe bed liftable, before supporting plate drives revolution by drive unit, supporting plate need be lifted certain altitude, the uplifting device structure that is contained at present on the machining center is that a vertical slideway is arranged, be provided with in the slideway with respect to slideway slide mass moving up and down, piston rod on the hydraulic jack connects slide mass, by the action of oil cylinder, drive slide mass and move up and down, utilize moving up and down of slide mass to drive supporting plate and lift or fall.Lifting velocity impacted greatly when this uplifting device was worked, and is not steady, and the speed near supporting plate the time, when lifting supporting plate, when motion stops all can not be by desirable state variation, to influencing lifting and rotating mass of supporting plate.
Summary of the invention:
The purpose of this invention is to provide a kind ofly operate steadily when lifting supporting plate, velocity perturbation is little, do not have impact, the four curve low impact high speed lifting mechanism of velocity variations, overcome the deficiencies in the prior art.
Technical solution of the present invention is: a kind of four curve low impact high speed lifting mechanism, it comprises hydraulic jack 1, vertical slideway 7, is positioned at the slide mass 8 of vertical slideway 7, it is characterized in that: in vertical slideway 7, be positioned at slide mass 8 below be provided with roller 6, roller 6 matches with the board-like cam 5 of its below, board-like cam 5 places in the slideway on the base 10 and joins with the external end head of piston rod 2 in the hydraulic jack 1, and the working curve on described board-like cam 5 tops is followed successively by:
0 millimeter of first section vertical stroke, 5 millimeters of horizontal throws are by one section rectilinear(-al);
12.5 millimeters of second section vertical strokes, 48 millimeters of horizontal throws are made up of two sections parabolas;
5 millimeters of the 3rd section vertical strokes, 80 millimeters of horizontal throws are by one section rectilinear(-al);
32.5 millimeters of the 4th section vertical strokes, 112 millimeters of horizontal throws are made up of two sections parabolas;
0 millimeter of the 5th section vertical stroke, 5 millimeters of horizontal throws.
Described parabolical equation is followed successively by: x
2=2py, wherein p=46.201;
x
2=2py, wherein p=64.32;
x
2=2py, wherein p=132.89;
x
2=2py, wherein p=95.13.
The present invention compared with prior art, because the tabular cam that below slide mass, is provided with roller and matches with roller, cam leans roller by its working surface and slide mass rises or descends, velocity perturbation was little when supporting plate was moved up and down, do not have and impact, whole lift or dropping process in the speed that changes appears, as when lifting fast near supporting plate, contact supporting plate at a slow speed, acceleration is lifted, and near terminal slowdown, carries out the load-bearing state, the speed of lifting that changes can make supporting plate operate steadily, and improves operating efficiency.
Description of drawings:
Fig. 1 is that the master of the specific embodiment of the invention looks schematic diagram;
Fig. 2 is a schematic top plan view shown in Figure 1;
Fig. 3 is an A-A sectional schematic diagram shown in Figure 1;
Fig. 4 is that the master of board-like cam 5 looks schematic diagram.
The specific embodiment:
As shown in the figure: 1 is the hydraulic jack that joins with hydraulic control device, the termination thread connection of the piston rod 2 in the hydraulic jack 1 has contiguous block 3, connecting bolt 4 is housed on the contiguous block 3, the nut of connecting bolt 4 is positioned at contiguous block 3 inboards, connecting bolt 4 and tabular cam 5 thread connection, the base of tabular cam 5 is positioned at the slideway on the base 10, and removable with respect to slideway 10, and described hydraulic jack 1 is bolted on the base 10.Also bolting has vertical slideway 7 on base 10, is provided with the slide mass 8 that can slide up and down along vertical slideway 7 in vertical slideway 7, and slide mass 8 belows are connected with roller 6 with spools 9, and roller 6 just is seated on the working surface of tabular cam 5.
Be working face above the described tabular cam 5, the projection of working face in front view forms a projection line (referring to Fig. 4), and the projection line of working face is made up of straight line and many parabolas.
Wherein second section vertical stroke is 12.5 millimeters, and 48 millimeters of horizontal throws are made up of two sections parabolas, and one section parabolical equation is: x
2=2py, p=46.201 wherein, the parabolical horizontal throw of this section is 22.5 millimeters, vertical stroke is 5.48 millimeters.The parabolical equation of another section is: x
2=2py, p=64.32 wherein, the parabolical horizontal throw of this section is 25.5 millimeters, vertical stroke is the 12.5-5.48=7.02 millimeter.
5 millimeters of the 3rd section vertical strokes, 80 millimeters of horizontal throws are made up of one section angled straight lines.
32.5 millimeters of the 4th section vertical strokes, 112 millimeters of horizontal throws are made up of two sections parabolas, and one section parabolical equation is: x
2=2py, p=132.89 wherein, the parabolical horizontal throw of this section is 60 millimeters, vertical stroke is 18.29 millimeters.The parabolical equation of another section is: x
2=2py, p=95.13 wherein, the parabolical horizontal throw of this section is 52 millimeters, vertical stroke is 14.21 millimeters.
At second section front end one section straight line is arranged, 0 millimeter of vertical stroke, 5 millimeters of horizontal throws.It is one section horizontal linear.The 4th section rear end one section straight line is arranged, 0 millimeter of vertical stroke, 5 millimeters of horizontal throws are one section horizontal linears.
The working face master of above-mentioned tabular cam 5 looks projection line altogether by four parabolas and three rectilinear(-al)s.
The course of work is as follows: base 10 is bolted on the fuselage, the upper end of slide mass 8 just is positioned at the revolution supporting plate below of machining center, hydraulic jack 1 is by the hydraulic control device control action, piston rod 2 drives tabular cam 5 and moves along the slideway on the base 10, the working face of tabular cam 5 leans roller 6 rises slide mass 8 in vertical slideway 7, because the geometry of tabular cam 5 working faces determines, make slide mass 8 fast near supporting plate, contact supporting plate at a slow speed and lift supporting plate, quicken then to lift supporting plate, slowing down near terminal point the time stops and entering the load-bearing state, it is whole that to lift each stage velocity variations of process reasonable, save time, do not have and impact, operate steadily.