CN101275324B - Cam disc for a shedding mechanism of a loom - Google Patents
Cam disc for a shedding mechanism of a loom Download PDFInfo
- Publication number
- CN101275324B CN101275324B CN2008100874151A CN200810087415A CN101275324B CN 101275324 B CN101275324 B CN 101275324B CN 2008100874151 A CN2008100874151 A CN 2008100874151A CN 200810087415 A CN200810087415 A CN 200810087415A CN 101275324 B CN101275324 B CN 101275324B
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- CN
- China
- Prior art keywords
- motion
- cam
- motion state
- intercept
- state
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Classifications
-
- D—TEXTILES; PAPER
- D03—WEAVING
- D03C—SHEDDING MECHANISMS; PATTERN CARDS OR CHAINS; PUNCHING OF CARDS; DESIGNING PATTERNS
- D03C5/00—Cam or other direct-acting shedding mechanisms, i.e. operating heald frames without intervening power-supplying devices
- D03C5/02—Cam or other direct-acting shedding mechanisms, i.e. operating heald frames without intervening power-supplying devices operated by rotating cams
- D03C5/04—Construction or shape of cams
-
- D—TEXTILES; PAPER
- D03—WEAVING
- D03C—SHEDDING MECHANISMS; PATTERN CARDS OR CHAINS; PUNCHING OF CARDS; DESIGNING PATTERNS
- D03C3/00—Jacquards
- D03C3/24—Features common to jacquards of different types
- D03C3/32—Jacquard driving mechanisms
- D03C3/36—Griffe operating mechanisms
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- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Looms (AREA)
Abstract
A preferable eccentric apparatus (3) comprises a cam (6), with a circumference face (8) for determining various laws of motion with various sectors, which uses the law of motion in a primary motion state (a) and a final state (b, c) where the heald frame is possible to passes through less part of the motion thereof, and it is best that the part is less than 50% of the whole motion or the whole travel route, so as to determine the law of motion of the cam (6) in various motion sate or sector, to make a first derivative identical with a second one of the law of the motion for adjacent sectors in a transit site.
Description
Technical field
The present invention relates to cam and such eccentric equipment that is used for eccentric equipment.
Background technology
Use many heald frames mostly in order to form shed open on loom, they have many healds that are arranged in parallel respectively, pass its yarn eye guiding warp thread.In order to form shed open heald frame is promptly moved up and down.Use shuttle driving device, they are called shuttle machine or eccentric equipment for this reason.Produce a motion of oscillatorily back and forth carrying out at this eccentric equipment by rotatablely moving of driving shaft, derive moving up and down of heald frame by this motion.Can reach the high speed of knitting.
When heald frame moves up and down at heald frame, its parts, knit on the connecting rod between heald, shuttle machine and heald frame and the dobbies and have high dynamic load.
DE 10343377 discloses a dobbies, and each shuttle driving device is switched on and off.Use a ratchet controlling organization for this reason.Heald frame is on purpose remained on or under turn to the district, and other heald frame continues motion.In this regulation, make heald frame turn to the district can not be static fully, but slightly motion with swinging up and down.Avoid in turning to the district, acting on the acceleration force on the heald frame thus.Turning to the motion in the district and turning to the motion between the district to realize at this according to the different characteristics of motion.The characteristics of motion in turning to the district and the transition between the characteristics of motion that turns between the district realize like this, make that the first time derivative of integrated box movement is identical in two characteristics of motion.The different characteristics of motion realizes on different cams, wherein by the ratchet controlling organization from a cam changing-over to another cam.This shuttle machine is bothersome relatively and expensive.
In the knitting mill, use different shed forming devices in order to form shed open.Relate to so-called shuttle machine, eccentric equipment and jacquard at this.Not only in eccentric equipment but also in jacquard, be not used in the ratchet controlling organization that switches on and off each cam.But in these equipment, importantly, improve and knit speed and make load minimum.
Summary of the invention
Propose thus the objective of the invention is, provide a shed forming device or be suitable for the parts of this shed forming device, can improve the operating rate of loom by it, and not make its parts overload.
This purpose is achieved by a kind of cam that is used for the shed forming device of loom.This cam has a pivot and a periphery, its radius changes, be used for when cam rotates, giving stroke motion for the cam tracking mechanism that leans on periphery, wherein periphery is divided into first intercept, second intercept, the 3rd intercept and the 4th intercept, a different motion state that is connected the heald frame on the cam tracking mechanism is corresponding to described intercept, wherein different intercepts is corresponding to the different characteristics of motion, first motion state, second motion state, the 3rd motion state and the 4th motion state correspond respectively to first intercept, second intercept, the 3rd intercept and the 4th intercept, and the different characteristics of motion interconnects them at single order and second dervative place consistent with each other, described second motion state and/or the 4th motion state produce at least one reversing of motion, and described second motion state and/or the 4th motion state produce the oscillating motion of heald frame.
According to cam of the present invention is the parts that will seek.It preferably is in the driving shaft of lasting operation, and lasting driving connects and realize at least two different characteristics of motion on its cam surface or periphery.A characteristics of motion is determined heald frame at the upper and lower motion process that turns between the district, and another characteristics of motion is described heald frame and turned to the motion in district at it.Select the described characteristics of motion like this, make that the single order of two characteristics of motion and second time derivative are consistent with each other.This point is got rid of bump and the impact in the transition of the characteristics of motion.Reduce thus and also avoid vibration and wearing and tearing to a great extent.Consequently reduce active force and load on harness frame drive device and heald frame.Can move with high rotational speed when making shed forming device, for example eccentric equipment formed be equipped with thus, and can not cause the damage that damages and can not cause connecting rod, heald frame, its parts and heald according to cam of the present invention.
Have a plurality of different motion states according to cam of the present invention.Motion state a), a ') be main motion state (in the upper and lower motion state that turns between the district), motion state b) be to go up end-state (on turn to district) and motion state c) be end-state (descending to turn to the district) down.At motion state b), a) and c) in heald frame carry out its stroke range in moving downward, at motion state c), a ') and b) heald frame carry out its stroke range in moving upward.Not only main motion state a), a ') and state b) and c) all be motion state, heald frame is carried out the stroke that at least one part will be passed by therein.They for example can produce heald frame and turn to the inner upper and lower motion in district.But they can produce a motion equally well, this motion causes static in short-term and keeps static as ordinary, wherein in this case at state b) with a) or a) with c) or c) with a ') or a ') with b) the characteristics of motion between transition under the condition that the single order of the characteristics of motion and second order stroke or time-derivative equate, realize respectively.This makes integrated box movement not carry out the transition to NextState from a state of motion with having impact and bump.Variation by motion state length and select the characteristics of motion separately can produce integrated box movement, they are to the requirement of heald frame pettiness and allow higher shuttle machine rotating speed more.In this motion state a), a ') major part can optimization, and needn't consider at state b) and c) during the motion requirement.
Preferably make motion state a), a ') constitute by major state, carry out at least 50% of its stroke at this state heald frame.At motion state b) and c), promptly in the oscillating motion that is turning to district's heald frame to finish its stroke and reach static or carry out to wait for.In major state with effective in the different characteristics of motion of end-state.Two end-state are respectively to turn to the district, and they can have different time spans and also have different stroke range.They can be mutually differently determine, as long as consistent in the single order of separately the characteristics of motion and second dervative to the transition of major state.
The heald frame that is in operation is carried out motion up and down.The above-mentioned motion as the stroke description not only can moving downward but also all being suitable for for moving upward of heald frame for heald frame.
The cam that moves up and down according to definite heald frame of the present invention is by at least four motion states, motion state b), c), a) and a ') form.Can make according to cam of the present invention according to the woven flat product that will process and to have a plurality of above-mentioned motion states.Also it is contemplated that, make motion state consistent or partly consistent.
As in common shed forming device, this cam preferably being set up a complementary cam.This complementary cam has the profile with the cam complementation.
Other details of advantageous embodiment of the present invention is by providing in accompanying drawing, description or the claim.
Description of drawings
Embodiments of the invention shown in the drawings.Wherein:
Fig. 1 illustrates a heald frame with schematic diagram, and it has the eccentric equipment that is used to drive it,
Fig. 2 illustrates the cam follower according to the cam of Fig. 1 and eccentric equipment,
Fig. 3 illustrates cam contour according to Fig. 2 with curve map,
Fig. 4 illustrates the embodiment of the variation of cam with obviously exaggerative view,
Fig. 5 illustrates the characteristics of motion according to the cam of Fig. 4 with curve map.
The specific embodiment
A heald frame 1 shown in Figure 1, it is vertically driven on up-down vibration ground by eccentric equipment 3 by connecting rod 2.The vertical direction of representing by arrow be called X to.Described eccentric equipment 3 has Rocker arm 4 in its output, it is connected with connecting rod 2.This Rocker arm 4 is carried out the motion of double vibrations, represents by arrow y in Fig. 1, and this motion is derived by the rotation of main shaft 5.This main shaft is furnished with drive unit, for example motor and with the rotation of substantially invariable rotating speed.
A cam 6 as shown in Figure 2 is positioned on the main shaft 5.Its pivot 7 is determined by main shaft 5.It has a periphery 8, and the radius r of itself and pivot 7 depends on anglec of rotation α.Cam tracking mechanism 9, for example the form with roller 10 leans on periphery 8, and this roller is by fork 11 supportings.This fork can be around pivot 12 swings, and wherein its oscillating motion is delivered on the Rocker arm 4 by unshowned being in transmission connection.
Described periphery 8 has a plurality of intercept a, a ', and b, c, they determine different " characteristics of motion ".Be interpreted as a function r (α) about the characteristics of motion at this.The radius of characteristics of motion b and c is positioned at mutual disjoint scope in addition.In order to select to be used for scope a, a ', the characteristics of motion of b and c is consulted Fig. 3.Ordinate is represented stroke in Fig. 3, and abscissa is represented the time.Scope B1 is illustrated in motion state c) in trip segment (turn to down district).Position B2 is illustrated in motion state b) in trip segment (on turn to the district).Scope B3 be illustrated in motion state a) and a ') in trip segment (at the range of movement that turns between the district).Stroke range B1 and the B2 of angular segments b and c are non-intersect.They are separated from each other by the scope B3 that is attached to angular range a or a '.
Scope a, a ', b, c are the motion states that is used for cam tracking mechanism 9 and therefore is used for heald frame 1.The characteristics of motion in these motion states is different, wherein constitutes the transition between each motion state b → a and a → c and c → a ' and a ' → b like this, makes that first and second order derivative of the characteristics of motion of adjacent mutual transition is identical.But according to Fig. 2 and 4 can have the characteristics of motion of the characteristics of motion form of all mathematical descriptions according to cam of the present invention, for example sine, cosine, multinomial etc. and form by it and.A cam also can have the characteristics of motion that can not analyze description.
Considering under the condition of above-mentioned transition condition that described cam tracking mechanism 9 has an intercept a for corresponding formation, a ', b, the cam of c have the motion process that does not have bump and impact.Described intercept a ' can be a main motion state that reverses with intercept a.
Stipulated a motion in the above-described embodiments in motion state b and c, it is almost static on the outer end that turns to district B1 and B2, also can stipulate other the characteristics of motion, as shown in Figure 5.Corresponding cam obviously is shown in Fig. 4 large.The characteristics of motion in motion state b and c is considered to harmonic function, and wherein these functions needn't have constant amplitude and also needn't have constant frequency.Heald frame 1 is turning to the district to carry out oscillating motion in this case.This oscillating motion in turning to district b and c shown in Figure 5.Above-mentioned condition in the transition region of different range of movement also is suitable in according to the cam embodiment of Fig. 4.Produce the transition region of not having bump and impacting thus.
Eccentric equipment with above-mentioned form cam forms the optimization of heald frame 1 motion process.Its acceleration and its braking can be optimized.Its speed in motion state a and a ' can be maximum in addition, and can not make the parts overload of the parts or the eccentric equipment 3 of heald frame.When high rotating speed, also can make thus for adding and impact the time interval maximum of using.
The eccentric equipment 3 an of the best comprises cam 6, and its periphery is determined the different characteristics of motion at different sectors.These characteristics of motion are used for main motion state a, a ' and end-state b, c, in end-state heald frame may pass by its motion than small part.This part is preferably in below 50% of its whole motion or its whole stroke.Determine the characteristics of motion of different motion state or cam 6 sectors like this, make that the single order and the second dervative of the characteristics of motion of adjacent sectors is consistent with each other on crossover position.
List of numerals
1 heald frame
2 connecting rods
3 eccentric equipments
4 rocking arms
5 main shafts
6 cams
7 pivots
8 peripheries
9 cam tracking mechanisms
10 rollers
11 forks
12 pivots
Claims (11)
1. cam (6) that is used for the shed forming device (3) of loom, wherein this cam (6) has a pivot (7) and a periphery (8), its radius (r) changes, be used for when cam rotates, giving stroke motion for the cam tracking mechanism (9) that leans on periphery (8), wherein periphery (8) is divided into first intercept (a), second intercept (b), the 3rd intercept (a ') and the 4th intercept (c), a different motion state that is connected the heald frame (1) on the cam tracking mechanism (9) is corresponding to described intercept, wherein different intercept (a, a ', b, c) corresponding to the different characteristics of motion, first motion state, second motion state, the 3rd motion state and the 4th motion state correspond respectively to first intercept (a), second intercept (b), the 3rd intercept (a ') and the 4th intercept (c), and the different characteristics of motion interconnects them at single order and second dervative place consistent with each other, described second motion state (b) and/or the 4th motion state (c) produce at least one reversing of motion, and described second motion state (b) and/or the 4th motion state (c) produce the oscillating motion of heald frame (1).
2. cam as claimed in claim 1 is characterized in that, described shed forming device is eccentric equipment (3).
3. cam as claimed in claim 1 is characterized in that described shed forming device is a jacquard.
4. cam as claimed in claim 1 is characterized in that, and described first motion state (a) and the 3rd motion state (a ') be major state, heald frame is carried out at least 50% of its stroke therein.
5. cam as claimed in claim 1 is characterized in that, described second motion state (b) has different time spans with the 4th motion state (c).
6. cam as claimed in claim 1 is characterized in that, described second motion state (b) has different stroke range with the 4th motion state (c).
7. cam as claimed in claim 1 is characterized in that, described second motion state (b) satisfies the different characteristics of motion with the 4th motion state (c).
8. cam as claimed in claim 1 is characterized in that, described cam is set up a complementary cam.
9. an eccentric equipment has as each described cam in the above-mentioned claim.
10. a jacquard has as each described cam in the above-mentioned claim.
11. a loom, have the shed forming device that is used for loom as each described cam (6) of claim 1 to 8.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP07006377.1 | 2007-03-28 | ||
| EP20070006377 EP1975292B1 (en) | 2007-03-28 | 2007-03-28 | Cam disc for a shedding mechanism of a loom |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101275324A CN101275324A (en) | 2008-10-01 |
| CN101275324B true CN101275324B (en) | 2011-06-01 |
Family
ID=38481139
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008100874151A Expired - Fee Related CN101275324B (en) | 2007-03-28 | 2008-03-27 | Cam disc for a shedding mechanism of a loom |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP1975292B1 (en) |
| CN (1) | CN101275324B (en) |
| DE (1) | DE502007005459D1 (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2278052B1 (en) | 2009-07-20 | 2014-03-05 | Groz-Beckert KG | Shaft drive for a heald frame of a loom |
| CN104480608B (en) * | 2015-01-19 | 2016-02-10 | 李素凤 | Swing mechanism in a kind of jacquard |
| CN106321766B (en) * | 2015-06-30 | 2018-08-07 | 健腾精密机电股份有限公司 | The pod profile of more roller type fluctuation drivers, the design method of pod wheel profile and cam contour |
| CN105002621A (en) * | 2015-08-24 | 2015-10-28 | 吴江万工机电设备有限公司 | Amend method for cosinusoidal motion law of negative shedding cam |
| CN105506810A (en) * | 2016-01-25 | 2016-04-20 | 上海超诚电子科技有限公司 | Jacquard transmission mechanism |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR965418A (en) * | 1947-05-08 | 1950-09-12 | ||
| FR1251942A (en) * | 1960-03-25 | 1961-01-20 | Goetaverken Ab | Cam enhancements for actuating a reciprocating spring return element, for example the exhaust valve of an internal combustion engine |
| AU431760B2 (en) * | 1968-11-26 | 1973-01-15 | Cannon Mills Company | Shuttleless terry loom warp shedding means and method |
| DE2113070B2 (en) * | 1970-07-27 | 1973-08-30 | CAMS CONSISTING OF SEVERAL ELEMENTS FOR IN PARTICULAR CAMSHAFTS OF FAST-RUNNING COMBUSTION MACHINES | |
| CS162965B1 (en) * | 1972-06-12 | 1975-07-31 | ||
| JPH03152233A (en) * | 1989-11-08 | 1991-06-28 | Murata Mach Ltd | Structure of cam in cam dobby loom |
| DE29500594U1 (en) * | 1995-01-16 | 1995-02-23 | Stäubli & Trumpelt GmbH, 95448 Bayreuth | Modulation gear for a rotary shaft machine in a weaving machine |
| IT1276912B1 (en) * | 1995-10-11 | 1997-11-03 | Brevtex Sa | DOBBY WITH OVERLAPPED CONJUGATED CAMS FOR THE DESMODROMIC DRIVE OF TEXTILE LOOMS |
| DE10343377B3 (en) * | 2003-09-17 | 2005-04-28 | Groz Beckert Kg | Shaft drive for weaving shafts |
| FR2868089B1 (en) * | 2004-03-29 | 2006-06-09 | Staubli Faverges Sca | COMPLEMENTARY CAME FOR MECHANICS OF WEAVING WEAPONS AND METHOD OF MANUFACTURING THE SAME |
| DE102005021788B4 (en) * | 2005-05-11 | 2006-12-28 | Krüger, Hermann, Prof. Dr.-Ing. | Method and device for producing a three-dimensional cam and three-dimensional cams, in particular for the variable actuation of lift valves in internal combustion engines |
-
2007
- 2007-03-28 DE DE200750005459 patent/DE502007005459D1/en active Active
- 2007-03-28 EP EP20070006377 patent/EP1975292B1/en not_active Expired - Fee Related
-
2008
- 2008-03-27 CN CN2008100874151A patent/CN101275324B/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| DE502007005459D1 (en) | 2010-12-09 |
| EP1975292B1 (en) | 2010-10-27 |
| EP1975292A1 (en) | 2008-10-01 |
| CN101275324A (en) | 2008-10-01 |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110601 Termination date: 20180327 |
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| CF01 | Termination of patent right due to non-payment of annual fee |