CN102286850A - Elliptical-track needling mechanism - Google Patents

Abstract

The invention discloses an elliptical-track needling mechanism which comprises a spindle (1) and a pushing rod (2), wherein the spindle (1) is connected with a connecting rod (4) through an eccentric wheel (3); and the connecting rod (4) is connected with the pushing rod (2). The needling mechanism also comprises a cylindrical cam (5) and a guide sleeve (6), wherein a driven member (7) in the guide groove (13) of the cylindrical cam (5) is connected with the guide sleeve (6). The elliptical-track needling mechanism disclosed by the invention has compact structure and moves reliably, elliptical track can be realized, and the stretching and torsion problems of a fiber web are solved, thereby improving the quality of non-woven product. According to the invention, the design of a spindle box can be consistent with the currently universal needling machine spindle box design so as to ensure technical inheritability between the high-speed needling machine and the traditional needling machine in design and manufacture.

Description

The elliptical orbit acupuncture mechanism

Technical field

The present invention relates to a kind of acupuncture mechanism, the particularly a kind of acupuncture mechanism that can realize elliptical orbit belongs to the needing machine technical field.

Background technology

Along with the development of nonwoven production technology, the quality and the production efficiency of nonwoven fabric product are all had higher requirement.

Needing machine is as a key equipment on the non-woven fabric production line, its effect is by pricker fibre bundle have been thrust fibre web, thereby the frictional force between interior fiber of fibre web and the fiber is strengthened, fibre web intensity raises, increase in density, make and play intermeshing effect between the fiber, and the final nonwoven fabric product with performances such as certain brute force, density, elasticity that forms.

On traditional middle low speed needing machine, pricker carries out the reciprocating motion of vertical direction along with needle beam, when thorn needle-penetration fibre web, fibre web is hooked by pricker, when fibre web leaves pricker, it is accelerating to output speed in moment again, thereby has caused the drawing-off and the distortion of fibre web, and and then has influence on the quality of nonwoven fabric product.

Summary of the invention

Technical scheme to be solved by this invention provides a kind of oval acupuncture mechanism that can realize that elliptical orbit again can the high speed reliability service.

In order to solve above-mentioned technical problem, the way of solution be make pricker in piercing through the process of fibre web along with fibre web is done horizontal movement, the elliptical orbit needing machine is exactly a kind of effective method, it makes needle beam move with fibre web.Need a kind of oval acupuncture mechanism that can realize that elliptical orbit again can the high speed reliability service for this reason.

In order to realize above-mentioned technical purpose, technical scheme of the present invention is: a kind of elliptical orbit acupuncture mechanism, comprise main shaft and push rod, described main shaft is connected with connecting rod by eccentric wheel, connecting rod is connected with push rod, described acupuncture mechanism also comprises cylindrical cam and guide pin bushing, and the driven member in the cylindrical cam guide groove is connected with guide pin bushing.

In order to realize the reciprocating synchronous of level and vertical direction better, described acupuncture mechanism also comprises asessory shaft, described asessory shaft one end is connected by crossed helical gears with an end of cylindrical cam, and the other end of described asessory shaft is connected with main shaft with belt by belt wheel.

Operation principle of the present invention is as shown in accompanying drawing Fig. 1, and this mechanism realizes elliptical orbit by the formed compound motion of the reciprocating motion of the reciprocating motion of vertical direction and horizontal direction.The reciprocating motion of vertical direction realizes by toggle, when doing vertical motion under the drive of push rod at connecting rod, also under the drive of guide pin bushing 6, do horizontal reciprocating movement, the motion of guide pin bushing 6 realizes by cylindrical cam 5 mechanisms, and the velocity of rotation of cylindrical cam 5 is identical with the velocity of rotation of crank.

Compact conformation of the present invention, reliable can be realized elliptical orbit.Solve the drawing-off and the distortion problem of fibre web, thereby improved the quality of nonwoven fabric product.The present invention can be consistent with main spindle box and at present general needing machine main spindle box design, the design that has guaranteed high-speed needling machine with make and can hold technical inheritance with the needled conventionally organizational security.

Description of drawings

The present invention is further detailed explanation below in conjunction with the drawings and specific embodiments.

Fig. 1 is a schematic diagram of the present invention.

Fig. 2 is a structural representation of the present invention.

Fig. 3 is an elliptical orbit motion schematic diagram of the present invention.

Fig. 4 is the situation schematic diagram of two semiellipse junctions on the cam rail molded lines.

The specific embodiment

As shown in Figure 1, 2, a kind of elliptical orbit acupuncture mechanism, comprise main shaft 1 and push rod 2, described main shaft 1 is connected with connecting rod 4 by eccentric wheel 3, connecting rod 4 is connected with push rod 2, described acupuncture mechanism also comprises cylindrical cam 5 and guide pin bushing 6, and the driven member 7 in cylindrical cam 5 guide grooves 13 is connected with guide pin bushing 6 by two sleeve connecting plates 12.

The driving of cylindrical cam 5 is by realizing from the driving-chain of main shaft 1, concrete grammar is: main shaft 1 is by being with 11 gyration passed to synchronous pulley 10 synchronously, and and then pass to asessory shaft 8, asessory shaft 8 passes to cylindrical cam 5 by bevel-gear sett with gyration again.Last cylindrical cam 5 is controlled driven member 7 by guide groove and is realized predetermined motion.

Key of the present invention is the molded lines of cylindrical cam 5 upper rails 13, and it has directly determined the motion of mechanism track.Concern according to compound motion shown in Figure 3 and to carry out theory analysis:

In said mechanism, be synchronous operated as the crank and the cylindrical cam 5 of driving link, when crank was positioned at peak C, the end of connecting rod should be positioned at the S point; When crank was positioned at level point E, the end of connecting rod 4 should be positioned at oval minor axis F point.In the ordinary course of things, crank is positioned at the A point, and the angle of crank and vertical direction is θ, and this moment, connecting rod end was positioned at the D point on the ellipse.Therefore,, just can determine the molded lines of cylindrical cam guide groove, and and then design cylindrical cam as long as determine the relation of the rotational angle theta of coordinate that the oval D of going up order and crank.

The D point is positioned on the ellipse, is the origin of coordinates here with the elliptical center, and its elliptic equation is:

$\frac{x^2}{{\mathrm{<figure-callout\; id="2"\; label="m"\; filenames="HDA0000082926460000011.png,HDA0000082926460000012.png"\; state="\{\{state\}\}">m</figure-callout>}}^2}+\frac{y^2}{{\mathrm{<figure-callout\; id="2"\; label="n"\; filenames="HDA0000082926460000011.png,HDA0000082926460000012.png"\; state="\{\{state\}\}">n</figure-callout>}}^2}=1---\left(1\right)$

According to geometrical relationship shown in Figure 3, can derive coordinate that D orders and be about the pass of crank angle θ:

$x=l+m-\sqrt{l^2-{(r\sin \mathrm{\&theta;}-y)}^2}-r(1-\cos \mathrm{\&theta;})---\left(2\right)$

The radius of establishing cylindrical cam in addition is R, and then the pass of elliptical orbit and R and crank angle θ is:

m-x＝Rθ (3)

By above three formula simultaneous, rotational angle theta is quantized in [0,2 π] scope, utilize numerical method can try to achieve interpolation point on guide groove 13 molded lines of corresponding cylindrical cam 5, match just can obtain required cam profile through curve again.

The reciprocating motion of vertical direction realizes by toggle.When push rod 2 was done vertical motion under the drive of connecting rod 4, cylindrical cam 5 guide grooves 13 molded lines had been controlled the movement locus of guide pin bushing 6, and push rod 2 is done horizontal reciprocating movement under the drive of guide pin bushing 6, and the velocity of rotation of cylindrical cam 5 is identical with the velocity of rotation of crank.

Fig. 4 is the situation of two semiellipse junctions on cylindrical cam 5 guide grooves 13 molded lines, and the center line of the guide groove on the cylindrical cam is after launching, and the local circumstance of its planar graph as shown in Figure 4.Wherein dotted line is the molded lines of trying to achieve according to theory relation recited above, consider cylindrical cam 5 mechanism's traveling comforts, need revise the molded lines of two semielliptical junctions, the solid line among the figure partly is revised cam profile, and the flatness of molded lines is improved as can be seen.

The foregoing description does not limit the present invention in any way, and every employing is equal to replaces or technical scheme that the mode of equivalent transformation obtains all drops in protection scope of the present invention.

Claims (2)

1. elliptical orbit acupuncture mechanism, comprise main shaft (1) and push rod (2), described main shaft (1) is connected with connecting rod (4) by eccentric wheel (3), connecting rod (4) is connected with push rod (2), it is characterized in that: described acupuncture mechanism also comprises cylindrical cam (5) and guide pin bushing (6), and the driven member (7) in cylindrical cam (5) guide groove (13) is connected with guide pin bushing (6).

2. elliptical orbit acupuncture mechanism according to claim 1, it is characterized in that: described acupuncture mechanism also comprises asessory shaft (8), described asessory shaft (8) one ends are connected by crossed helical gears (9) with an end of cylindrical cam (5), and the other end of described asessory shaft (8) is connected with main shaft (1) with belt (11) by belt wheel (10).

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