CN2175770Y

CN2175770Y - Shuffling device of variable guide-length screw-driven wefting mechanism

Info

Publication number: CN2175770Y
Application number: CN 93243514
Authority: CN
Inventors: 林林波
Original assignee: YIJIN MECHANICAL INDUSTRIES Ltd Co
Current assignee: YIJIN MECHANICAL INDUSTRIES Ltd Co
Priority date: 1993-10-28
Filing date: 1993-10-28
Publication date: 1994-08-31
Anticipated expiration: 2003-10-28

Abstract

The utility model relates to a sliding block device of a changeable lead distance screw rod driving weft insertion mechanism used for a sword mast type loom. The utility model comprises two driving surfaces whose involute curvature can be elastically regulated, then the utility model can fit the change of the screw thread curved surface of a changeable lead angle screw rod, the screw thread and the driving surfaces of the utility model produce a front point contact and a back point contact, and then the high wear defect of keeping conjugate meshing at any time is avoided.

Description

Shuffling device of variable guide-length screw-driven wefting mechanism

The utility model relates to a kind of slide block device that becomes helical pitch screw drive weft insertion device, especially adopt in the rapier type loom and become the helical pitch screw rod, so that the weft insertion device of the acceleration that sword pestle acquisition weft yarn intensity can bear, its inner and the slide block that becomes helical pitch screw flight curved surface Elastic Contact, be with two rotor side surfaces that can elasticity rotate be provided with can with become the drive surface that helical pitch screw flight curved surface contact before and after keeping at 2.

The general weaving loom aspect that is to weave cotton cloth is used, the person that comparatively is not widely used is the rapier type shuttle-free loom, its reason is can be more in order to the yarn kind of knitting knot, but its shortcoming has seriously influenced the market competitiveness of rapier type loom in " fluctuating acceleration that produces during the picking campaign; the impulsive force that its maximum produced; often improve and increase along with the loom rotating speed, limited the high speed of loom ".

In addition, the speed of rapier type loom can't improve, and main cause is that yarn strength is limited, and can bear sword pestle acceleration, to produce inertia force limited, for fear of breaking weft yarn, and makes the speed of weaving cotton cloth of whole loom be subjected to very big restriction.

Moreover, general yarn is when wefting insertion, the peak acceleration that can bear the sword pestle is about about 1500m/sec, but in waiting screw rod weft insertion device of lead angle, if when main shaft maintained 500rpm, sword pestle maximum forward acceleration was about 1000m/sec, and backward acceleration please cooperate referring to shown in Figure 1 up to 2110m/sec(), under the so high inertia force effect that acceleration produced, yarn will be difficult to bear and be broken.Therefore, in order to reduce shutdown, the speed drop of main shaft is low to moderate 200-300rpm, and the speed of weaving cotton cloth of loom is reduced greatly.

So loom producer, promptly develop and a kind of change helical pitch screw rod weft insertion device, this weft insertion device 20(please cooperate referring to shown in Figure 2) why produce the key of fluctuating acceleration, it is the driving screw 21 that is to become helical pitch by a tool, its screw thread 22 is combined with several to roller 23, make roller 23 be become relative a pair of by device, the screw thread 22(that is engaged in driving screw 21 that each is certain as shown in Figure 3).Roller 23 is installed in the lining 24, lining 24 is fixed on the axle of saddle perpendicular to driving screw 21, and when making this sliding part be on the driving screw 21 sliding transfer, because of roller 23 guiding restrictions make driving screw 21 produce fluctuating acceleration, be reduced to weft yarn with the wefting insertion acceleration that reaches the sword pestle and can bear in the tension range.But this roller 23 slides (please cooperate referring to Fig. 3 and shown in Figure 4) on the screw thread 22 of driving screw 21, can be considered the cutter of driving screw 21 screw threads 22 cuttings, it rolls on screw thread 22 back and forth, reach situation about meshing and all can be considered cutter milling campaign with driving screw 21, so that but having following shortcoming in the use, reality produces: 1. 60 ° of mismachining tolerances and 55 ° of milling cutter beats etc., and it is not good all to cause screw thread and roller to mesh; 2. driving screw imposes the screw thread distortion that heat treatment causes, and also produces the engagement clearance inequality of roller and screw thread; 3. the assembling geometric accuracy is not good.And the relative meeting of these shortcomings causes roller and the screw-threaded engagement reduction of area is little, face is pressed and strengthened, abrasion are quickened, and especially causes roller surface to scrape damage under back and forth rotating, even causes the not clear shutdown of killing.If only for fear of improper abrasion, the way that only underspeeds can't reach the effect that expection improves output so again.

So weaving loom producer, be this to be driven the weft insertion device that becomes the helical pitch screw rod with roller improved, a kind of weft insertion device that replaces roller with conjugation-type slide block 30 is proposed, make this slide block 30 have conjugate planes 31, the screw thread 22(that is engaged in driving screw 21 with involute contour please cooperate referring to Fig. 4, shown in Figure 5), to obtain bigger load face, to reach surface pressure and abrasion reductions (comparing) with roller.But because the manufacturing of screw thread is to utilize the milling of column type milling cutter to form, therefore its curved surface is the ruled surface 22(screw thread curved surface that straight line constitutes), slide block all needs the engagement with screw thread curved surface 22 maintenance conjugation at any time, so the conjugate planes 31 of slide block 30 also is a ruled surface.This class obviously has sizable improvement and practical value than the roller type weft insertion device with the weft insertion device that slide block drives; It is in the practical application, but still has following shortcoming: 1. slide block conjugate surface and the manufacturing of screw thread curved surface are difficult for reaching institute's refinement degree; 2. the helical pitch that becomes the helical pitch screw rod changes with the position is different, and the screw thread curved surface is change thereupon also, and the conjugate planes of sliding shoe but can not change (please cooperate referring to Fig. 6, Fig. 7 and Fig. 8) thereupon, and abrasion are quickened in relative meeting, and then shorten the accent cycle of slide block; 3. the error of processing assembling, heat treatment deformation, mismachining tolerance etc. all easily causes unequal abrasion; 4. the reed width difference of weaving loom, it becomes the involute screw thread difference of helical pitch screw rod, and its slide block is also different thereupon, so the weaving loom that slide block can not the simultaneous adaptation different size is shared, and needs collocation one to one.

Therefore, the purpose of this utility model is to provide a kind of slide block device that becomes helical pitch screw drive weft insertion device, and it can effectively improve the rotating speed of weaving loom, can reduce the slide block rate of wear again simultaneously, prolongs slide block and transfers the cycle.

For this reason, the utility model proposes a kind of slide block device that becomes helical pitch screw drive weft insertion device, this slide block is hubbed on the lining with axle, it can be contacted with change helical pitch screw flight curved surface, this slide block has a base and cooperates two to rotate the guide blocks combination of splicing, block body one side that the base external diameter is convexly equipped with cooperates flexible member lock knot fixedly to stand, and it is corresponding with flexible member that other convexes with block body projection; Two rotate guide block has same structure, be up and down and fit, make both all relevant positions be up and down with about corresponding, the side is convexly equipped with and is block, convexes with slide body with the block sides adjacent, and in the terminal drive surface that forms of slide body, so that this drive surface must contact with change helical pitch screw flight curved surface, the one block can be stopped by the block body of base simultaneously, and another block is stopped by flexible member then, rotates the slewing area of guide block with restriction; The rotation guide block of slide block is subjected to the block body and the flexible member ejection of base, becomes on the helical pitch screw flight curved surface and two drive surface are pushed up at any time be affixed on, and regardless of the curvature variation how of this screw thread curved surface, can both keep the contact of 2 of its front and back.

Slide block device of the present utility model is given up higher hierarchy of skill process technology, can keep it simultaneously again and become helical pitch screw rod weft insertion device proper function benefit, and making this slide block and become the helical pitch screw rod can both be with simple process technology level manufacturing.

According to slide block device of the present utility model, the conjugation contact-making surface that the conventional sliders of having forgone and change helical pitch screw flight are adopted, change with two contact-making surfaces before and after having flexible adjustment and paste the slide block device that touches the screw rod curved surface, make this slide block can guarantee forever to keep front and back two contact points, to reach the rotation of stabilized driving screw rod with the screw thread curved surface.

According to slide block device of the present utility model, because of slide block has adopted 2 slide block devices that contact with change helical pitch screw flight curved surface in front and back, the resistance that this slide block is contacted with screw rod reduces, relative can reduce rate of wear, and then reaches the Practical Benefit of saving horsepower consumption, prolonging slide block abrasion adjustment cycle.

Below, will in conjunction with the accompanying drawings specific embodiment of the utility model be done a detailed explanation, in the accompanying drawing:

Fig. 1 is that to wait the lead angle weft insertion device be sword pestle moving situation analysis chart under the 500rpm in the speed of mainshaft;

Fig. 2 is the part stereogram that the roller type of prior art becomes the lead angle weft insertion device;

Fig. 3 is roller and change helical pitch screw rod bonding part cutaway view;

Fig. 4 is roller and change helical pitch screw flight curved surface engage side view;

Fig. 5 is the part stereogram that the prior art conjugation-type becomes the lead angle weft insertion device;

Fig. 6 is conjugation slide block and change helical pitch screw rod bonding part cutaway view;

Fig. 7 is conjugation slide block and change helical pitch screw flight curved surface engage side view one;

Fig. 8 is conjugation slide block and change helical pitch screw flight curved surface engage side view two;

Fig. 9 is a three-dimensional exploded view of the present utility model;

Figure 10 is the utility model and lining, become helical pitch screw rod relevant position figure;

Figure 11 is an elastic dilatation effect schematic diagram of the present utility model;

Figure 12 is an elastic closure effect schematic diagram of the present utility model;

Figure 13 is the utility model and change helical pitch screw flight curved surface engage side view.

Fig. 9 and Figure 10 show this slide block device of the present utility model, and its slide block 40 is hubbed on the lining 24 by axle 25, and it can be contacted with the screw thread curved surface 22 that becomes helical pitch screw rod 21.One base 41 cooperates two to rotate

guide blocks

42,43 combination of splicing, and it is spacing to cooperate flexible member 44 to give again, makes two to rotate

guide blocks

42,43 elasticity rotation in the certain angle scope.

Base 41, there is an axis hole in its central authorities, convex with two block bodies 411,412 between external diameter, and make two block bodies 411,412 slightly protrude high rising, its first block body, 411 1 sides are for providing flexible member 44 in conjunction with fixing, it can be provided with a screw 413, to cooperate screw S to the fixing usefulness of flexible member 44 lock knots, also can make flexible member 44 fixing by other fixing means.

Both have same structure to rotate

guide block

42,43, its difference only be base 41 fits in conjunction with the time, be to be up and down to fit, make both all relevant positions be up and down with about corresponding.Guide block central authorities have an axis hole, and the side is convexly equipped with and is block 421,431, convex with slide body 422,432 with the block sides adjacent, and in the terminal drive surface 423,433 that forms of slide body, this drive surface must be contacted with the screw rod curved surface 22 that becomes helical pitch screw rod 21, the one block can be stopped by the block body 412 of base simultaneously, and another block is stopped by flexible member 44 then, rotates the slewing area of guide block with restriction.

Flexible member 44 can be made with steel disc, and it has suitable rigidity, is fixed on the side of first block body 411, and can bear the ejection of rotating guide block, can elasticity rotate so that rotate guide block;

The sliding shoe 40 of element composition pivot on lining 24 is tied when locating as described above, two

rotate guide block

42,43 block 431,421 are subjected to second block body 412 of base 41 and stopping of flexible member 44, and make two

rotary blocks

42,43 only can be in

second block body

412 and 44 motions of flexible member, but its set drive surface 423,433 contact (as shown in figure 10) with the screw thread curved surface 22 that becomes helical pitch screw rod 21, make two

rotary blocks

42,43 be subjected to flexible member 44 ejection and the elasticity low-angle rotates (as Figure 11 and shown in Figure 12), and make drive surface 423, the screw thread curved surface 22 with becoming helical pitch screw rod 21 of 433 front and back contacts (as shown in figure 13), how the curvature of gas thread curved surface 22 does not change, its two drive surface 423,433 all can tandemly contact with screw thread curved surface 22, rotate with the stabilized driving screw rod.

Because the

rotation guide block

42,43 of slide block 40 of the present utility model is subjected to second block body 412 and flexible member 44 ejections of base 41, become on the helical pitch screw flight curved surface and two drive surface 423,433 are pushed up at any time be affixed on, no matter how the curvature of this screw thread curved surface changes, can both keep the contact of 2 of its front and back; Therefore, when being to make, it can give up the high-precision requirement of known conjugation contact and the process technology of higher level, and the economic benefit of the simple and easy manufacturing of tool.

Moreover the screw thread curved surface contacts with slide block two drive surface, and in the moving process, its contact is moved does not need to keep the conjugation engagement, and can keep 2 stable contacts on becoming the helical pitch screw rod.

In addition, even becoming helical pitch screw flight curved surface is processing and manufacturing, heat treatment deformation or assembles the error that is produced, the irregular wear that is caused all can effectively be avoided, and make it in practical application, can reduce horsepower consumption, simultaneously can prolong the abrasion adjustment cycle again, not only economy but also practicality.

Claims

A kind of slide block device that becomes helical pitch screw drive weft insertion device, this slide block is hubbed on the lining with axle, it can be contacted with change helical pitch screw flight curved surface, it is characterized in that: this slide block has a base and cooperates two to rotate the guide blocks combination of splicing, block body one side that the base external diameter is convexly equipped with cooperates flexible member lock knot fixedly to stand, and it is corresponding with flexible member that other convexes with block body projection; Two rotate guide block has same structure, be up and down and fit, make both all relevant positions be up and down with about corresponding, the side is convexly equipped with and is block, convexes with slide body with the block sides adjacent, and in the terminal drive surface that forms of slide body, so that this drive surface must contact with change helical pitch screw flight curved surface, the one block can be stopped by the block body of base simultaneously, and another block is stopped by flexible member then, rotates the slewing area of guide block with restriction; The rotation guide block of slide block is subjected to the block body and the flexible member ejection of base, becomes on the helical pitch screw flight curved surface and two drive surface are pushed up at any time be affixed on, no matter how the curvature of this screw thread curved surface changes, can both keep the contact of 2 of its front and back.