CN102292479A

CN102292479A - Drive apparatus for the draw-off rolls of a combing machine

Info

Publication number: CN102292479A
Application number: CN2010800054571A
Authority: CN
Inventors: D·博默; J·皮伦; T·佐林格
Original assignee: Maschinenfabrik Rieter AG
Current assignee: Maschinenfabrik Rieter AG
Priority date: 2009-01-26
Filing date: 2010-01-15
Publication date: 2011-12-21
Anticipated expiration: 2030-01-15
Also published as: EP2389463B1; CN102292479B; CH700285A2; EP2389463A1; JP5490142B2; JP2012515851A; WO2010083618A1

Abstract

The invention relates to a drive apparatus for generating a step-back movement for the draw-off rolls (A1, A2) of a combing machine, which are connected by drive means (Z1-Z3) to an output shaft (9) of a differential gear (1), the rotatably mounted web (2) of which is driven by at least one drive element (20, Z) driven at a constant rotational speed, wherein the differential gear (1) has a second gear stage (G2), which comprises a sun wheel (S2) fastened non-rotatably on the output shaft (9) and planet wheels (U4 to U6) mounted rotatably in the web (2) by way of shafts (33 to 35), and a first gear stage (G1) is provided, which comprises planet wheels (U1 to U3), each of which is arranged coaxially to the planet wheels (U4 to U6) of the second gear stage (G2) and fastened non-rotatably on the shafts (33 to 35) and have a drive connection to a further sun wheel (S1), which is fastened non-rotatably to a rotatably mounted drive shaft (5), which is driven by a drive unit (4, G3) in an irregular rotary motion. In order to optimize the curve of movement of the draw-off roll, while reducing the torque to be applied at the same time, it is proposed that the drive unit be formed by a gear stage (G3) having noncircular gear wheels (42, 43), which transforms a regular rotary motion of a main drive (HA) into an irregular rotary motion.

Description

The drive unit that is used for the detaching roller of combing machine

The present invention relates to a kind of drive unit that is used to produce the paces motion at intermittence of the detaching roller that is used for combing machine as described in the preamble according to claim 1.

For separation in combing machine and connection procedure, detaching roller is implemented a kind of paces motions at intermittence (Pilgerschrittbewegung).That is to say that before another separation process, the fiber web that has formed is carried certain amount backward on the direction of grip module, so that new fibre bundle is connected with fibroreticulate end.This requires a kind of very special drive unit, is used for this paces motion at intermittence of detaching roller with generation.In the case, the separation of new fibre bundle constantly and the separating rate of detaching roller all will accurately be matched with the clamp motion and circle is combed motion, to obtain the joint of wishing and/or to obtain uniform fibers net qualitatively.

In DE-PS1685575, describe a kind of embodiment, wherein used this motion of generation under a kind of differential gear.At this, differential gear, rotatably support the gear drive of disc by evenly being driven of sun gear therein, the disc wheel drive that this gear and are connected with disc connects.This gear is supported on the driving shaft of circle comb in this case un-rotatably.The a plurality of planetary gears of rotatably support in driven disc, they and corresponding sun gear engagement.By the eccentric driving device that is connected with lever transmission mechanism, the axle that a kind of motion heterogeneous is delivered to differential gear is gone up and is delivered to thus on connected first sun gear.By this motion heterogeneous, aforementioned uniform actuation movement is applied and produces the paces motion at intermittence that is used for detaching roller of hope.This transmission design has proved effectively for many years, but requires complicated and stable structure, so that can absorb the high acceleration force of appearance.In addition, there is frictional force on each joint part in lever transmission mechanism, must improves the power that needs owing to this frictional force.Along with the requirement more and more higher to the combing period, may certain the time also reached the limit of the load-bearing capacity of this transmission mechanism design.In addition, the free degree in the design of the curve movement of detaching roller is owing to using known lever transmission mechanism to be restricted.

Realize intermittently paces motion for mechanism and gear unit, also proposed some other suggestion with other.Advise that detaching roller is directly via one or more Motor Drive on the one hand.This solution for example can be known from EP-374723.By US-PS3,604,063 known a kind of variable gear units wherein use special cam drive unit in addition, with the paces motion at intermittence that realizes wishing.

By US-PS1,818,555 known a kind of embodiment, wherein the constant rotational motion that has under the differential gear of noncircular gear driving shaft in use converts intermittently paces motion to.This paces motion at intermittence output shaft and gear stage of following through being connected with a sun gear is passed on the detaching roller.Among this external disclosed CN-200710022458.7 a kind of device has been described, wherein with the US ' 555 that is quoted considerably, the differential gear comprise the gear stage with noncircular gear is used in suggestion.Only be the driving of disc is implemented through the disc wheel of an outside with the only difference of US ' 555, and the driving to disc is implemented through an axis of centres in the solution of US ' 555.

In the described solution of US ' 555 and CN ' 458.7, though can realize a kind of corresponding paces motion at intermittence according to the gear stage that uses with noncircular gear, but this solution is high-power and be restricted on the transmittability at high pulling torque thus, because mechanically can not use more than one planetary gear herein.In addition, with the US-PS1 that has illustrated, 818,555 described solution differences, the controllability of the actuation movement of detaching roller is restricted.

Present task of the present invention is to improve known solution and advise a kind of device that is used to drive detaching roller, when this device is included in the free degree in the design of the curve movement that improves detaching roller on the one hand, reduce needed up to now moment of torsion (power).That is to say that purpose is to be issued in littler torque load a kind of detaching roller curve movement of optimization thus.

This task solves thus, and the driver element of sun gear that promptly is proposed to be used in first gear stage of differential gear is formed by a gear stage with noncircular gear, and it is transformed into rotational motion heterogeneous with the uniform rotational motion of main drive.Use by suggestion comprises the transmission mechanism of the gear stage with noncircular gear, and the lever transmission mechanism that replaces known use to be connected with eccentric driving device can be kept and prove effective driving device structure up to now.Simultaneously, use gear stage with noncircular gear by suggestion, realized reduce drive on the load and coupling at the curve movement of detaching roller on unknown up to now optimization possibility.Suggestion in addition, the driving element that is used for disc is made up of a driving shaft, fixes a gear thereon un-rotatably, and this gear drives indirectly or directly with the disc wheel of the disc of differential gear and is connected.Term " indirectly " also can comprise for example breast wheel, and it is connected between the gear and disc wheel that is fixed on the driving shaft, so that for example the direction of rotation of delivery request is to the disc wheel.

At this, driving shaft can have another driving wheel, and it drives with a driving element of main drive and is connected, and this driving element also drives with the gear stage with noncircular gear simultaneously and is connected.Guarantee thus two driver circuits synchronously because the both is driven by the identical driving element of main drive, and connect other driving element in the middle of not having.

Suggestion in addition, the driving element of main drive is made up of the gear that is rotatably supported in the frame, this gear is driven by center driven motor (main drive) through other mechanism, wherein the rotation of this gear extends coaxially with the power shaft with gear stage of noncircular gear and described another driving wheel of driving shaft is configured to gear, and it is connected with the gear drive of main drive.But also it is contemplated that a kind of embodiment, wherein be fixed on to the direct geared of main drive on the power shaft of gear stage with noncircular gear.

In order to obtain to advise that in particular for adjusting the separation adjusting possibility constantly of detaching roller the power shaft of gear stage is connected with the gear of main drive un-rotatably through knock-down fixed mechanism with respect to the clamp motion.This moment can be for fixed mechanism disposes guiding mechanism, and this guiding mechanism allows to be adjusted in the anglec of rotation between the gear of power shaft and main drive when unclamping fixed mechanism.Can change the period of motion of detaching roller thus with respect to the clamp motion.The drive unit of clamp also joins with the main drive coupling.

If be fixed on driving shaft on and angle position driving shaft and described gear between can by institutional adjustment so also can alternatively so realize the change of the period of motion of detaching roller through removable the turning up the soil of fixed mechanism described gear.In order to regulate the period of motion of detaching roller, also can alternatively use another embodiment, wherein suggestion, the disc wheel is gone up and looking up in week at disc (2) through the removable disc (2) that is fixed on differential gear (1) of turning up the soil of mechanism (13), the disc wheel can be provided with respect to its ground, angle position of disc adjustment through governor motion (12,14).

Other advantage of the present invention is showed according to the following examples and is described in detail.

Shown in the accompanying drawing:

Fig. 1 is a schematic sectional view that installs designed according to this invention,

Fig. 2 is a side view X according to the transmission mechanism with noncircular gear of Fig. 1,

Fig. 3 is the partial view according to the amplification of Fig. 1, wherein has the example of fixing and regulating at the disc wheel of differential gear,

Fig. 4 is a view A according to the driving wheel 18 of Fig. 1,

Fig. 5 is a side view Y according to the differential gear of Fig. 1,

Fig. 6 is the curve map that has in the curve trend of a combing cycle period detaching roller motion,

Fig. 7 is the curve map that has in the torque loads of the drive unit of a combing cycle period detaching roller.

Fig. 1 show have around the differential gear 1 of disc 2, disc is rotatably supported on the bearing 6 in a side.Bearing is bearing on the axis of centres 5 for 6 this moments, and this axis of centres is rotatably supported among the frame MS through bearing 10,11 under this situation.At opposite side, disc 2 is bearing on the bearing 7.Bearing is supported on the hollow shaft 9 for 7 this moments, and the bearing 8 of this hollow shaft through schematically illustrating is supported on the axle of having mentioned 5.Certainly consider many other supporting possibilities at this.Around disc 2 be furnished with disc wheel 3, the disc wheel is permanently connected with disc.Shown in the view that amplifies, wherein disc wheel 3 is furnished with outstanding matrix 12 to another selection scheme in Fig. 3.When the both sides of matrix 12 parts that protrude in the disc wheel vertical notch 14 is set all, its longitudinal extension moves towards on the circumferencial direction of disc 2.Respectively have one or more screws 13 to protrude to pass this 14, these screws are fixed in the screwed hole 15 of disc 2.By tightening these screws 13, disc wheel 3 is by fixing with respect to disc 2.After unclamping screw 13, a plurality of screws wherein are arranged on the circumference of disc 2 with distributing, disc is taken turns can rotate certain amount in a circumferential direction with respect to disc, have changed its angle position with respect to disc thus.Be possible about detaching roller with respect to the adjusting possibility of the position of the separation point position of grip module (not shown) thus.This also will describe in detail in the back.

Gear Z is connected with being in to drive with 3 engagements of disc wheel through breast wheel 37.As schematically illustrating, breast wheel 37 is in its 36 bearing L that is rotatably supported in the frame.Gear Z is fixed on the driving shaft 20 un-rotatably, and this driving shaft is bearing in the frame through bearing position L.Another gear 16 is fixed on the driving shaft 20 at intervals with gear Z, and this gear 16 is in to drive with the gear 18 of main drive HA and is connected.In the case, the gear 18 that is bearing among the bearing Lx in the frame through axle 48 is driven by gear 19, and this gear 19 is connected with central transfer unit G driving through axle 38.The driving of the gear unit G driving through schematically illustrating is connected 40 to be implemented by motor M.Certainly this only is one of many possible enforcement flexible program that drives.For example also it is contemplated that the gear pair shown in belt gear is set to be replaced.

As in the replacement scheme of regulating possibility shown in Fig. 3, an adjusting device also can be set, as shown in FIG. 1 as its example.In the case, gear Z is connected with hollow shaft 22, and it has flange 23 and extends coaxially with driving shaft 20.The opposite of flange 23 is flanges 25, and the latter also is connected with axle 20 un-rotatably with axle 20 coaxial extensions and the spring in protruding into groove 29 28.In order to stop flange 25 to move axially, this flange is with screw 27 lockings that schematically illustrate.Connecting 24, two flanges 23,25 by means of the screw that schematically illustrates is relatively fixed mutually.Gear Z also is fixed on the axle 20 thus un-rotatably.As what in Fig. 5 (according to the view Y of Fig. 1), can see, in the zone of screw connection 24, an elongated hole 30 is set respectively, after unclamping screw connection 24, can implement the change of the angle position between gear Z and the axle 20 through this elongated hole.Utilize this mechanism also can change the separation moment of detaching roller with respect to the position of grip module.

To detaching roller A1, the driving of the A2 gear Z through being driven is equably on the one hand implemented, and this gear is taken turns 3 through breast wheel 37 with the disc of disc 2 and placed rotational motion.By this rotational motion, the bearing bearing L1 to L6 that is connected with disc 2 is moved, planetary gear U1 to U6 is rotationally through

axle

33,34, and 35 are bearing in this bearing bearing.Planetary gear U1 to U3 this moment (referring to Fig. 1) drives with sun gear S1 and is connected, and the latter is fixed on the axle 5 un-rotatably.

The sun gear S2 of the second gear stage G2 of differential gear 1 is connected with the hollow shaft 9 of rotatably support regularly, and as stating, this hollow shaft is supported on the axle 5 of rotatably support through bearing 8.Be distributed on the sun gear circumference and be bearing in planetary gear U4 to U6 and sun gear S2 in the disc 2 and drive and be connected.This moment, planetary gear U4 to U6 was through

axle

33,34, and 35 are connected with planetary gear U1 to U3.

Gear Z1 is fixed on the opposing ends of hollow shaft 9 regularly, and this gear Z1 drives with Z3 with gear Z2 again and is connected.Gear Z2, Z3 be through axle W1, W2 and detaching roller A1, and A2 connects.Detaching roller A1, A2 and/or axle W1, the bearing L of W2 through schematically illustrating is bearing among the frame MS.

The axle 5 of having fixed sun gear S1 on it is the output shaft that is connected the gear stage G3 with

noncircular gear

43,44 of differential gear 1 upstream simultaneously, and this noncircular gear is meshing with each other in shell 4.This moment, noncircular gear 43 was fixed on the axle 5 un-rotatably.Noncircular gear 42 is fixed on the axle 44 un-rotatably, is fixing flange 50 on this axle on its another end, is permanently connected through the gear 18 of this beam warp screw 51 of this flange with main drive HA.As schematically illustrate, axle 44 is rotatably supported among the frame MS through bearing 45.Other bearing position can also be set certainly.Equally, in shell 4, also be provided for the bearing position of

axle

5 and 44, as schematically illustrating among Fig. 1.

The elongated hole 53 (referring to the Fig. 4 of the view A among Fig. 1) that screw 51 protrudes by flange 50, and be received in the screwed hole 55 that is set in the gear 18.Gear 18 is bearing in the frame through bearing Lx with through axle 48 rotationally.This moment, the rotation of axle 44 and axle 48 was axially parallel mutually.As stating, the even driving of gear 18 to be implemented through gear 19, this gear 19 is connected with transmission mechanism G through axle 38, and the latter is driven motor M and drives with uniform rotating speed.

Replace at the possible governor motion shown in Fig. 3 and Fig. 5 an adjusting device being set, it is used to regulate the curve movement of detaching roller, as it as shown in Fig. 4.After unclamping screw 51, flange 50 can rotate certain rotational angle through elongated hole 53, so that be fixed on this new position by stretching screw 51 more subsequently.Between flange and gear 18, the mark (not shown) can be set, can determine corresponding adjusting by this mark.Can move the curve movement that separates cylinder with respect to the curve movement of grip module by this adjusting, grip module is also driven by main drive HA.

Such curve movement of detaching roller for example is shown among Fig. 6, and it shows the process of a combing circulation KS.In the first area, detaching roller is implemented motion backward, and the fiber web that has formed is thus carried on the direction of grip module backward.Carry out counter motion and detaching roller then and travel forward, so that implement separation process.The scale that surpasses zero line shows the conveying capacity of fibroreticulate reality.

By this adjusting, especially can change detaching roller A1, the disengaging time point of A2.

Through having the gear stage G3 of

noncircular gear

42,43, be passed on the noncircular gear 42 through the 44 uniform rotational motions of accepting by gear 18.With gear stage G3 in the mating reaction of noncircular gear 43 of engagement under, this uniform rotational motion is converted into a kind of rotational motion heterogeneous, this rotational motion heterogeneous is delivered on the sun gear S1 through axle 5.Simultaneously, uniform rotational motion also is delivered on the axle 20 and is delivered to thus on the gear Z through gear 16 from gear 18.

Gear Z is delivered to this uniform rotational motion on the disc 2 of differential gear 1 through breast wheel 37 and disc wheel 3, and planetary gear U1 to U3 is moved around sun gear S1.Form the synthetic rotational motion heterogeneous of planetary gear U1 to U3 in the case, the rotational motion heterogeneous that these planetary gears will synthesize is delivered on the planetary gear U4 to U6 that is connected with them.The motion heterogeneous that planetary gear U4 to U6 will produce like this (intermittently paces motion) is delivered to sun gear S2, and this sun gear will this motion heterogeneous be delivered to the gear Z2 and the Z3 of detaching roller through axle 9 and gear Z1.

By correspondingly designing the non-circular gear 42 of gear stage G3,43, the trend of the curve movement of optimized Separation roller (Fig. 6) promptly can reduce to drive the moment of torsion that load maybe will apply significantly in this wise, as this schematically illustrating in the curve map of Fig. 7.Show the change procedure of the moment of torsion M (Nm) in a combing circulation at this, this combing circulation is divided into 40 calibration.The curve that draws with solid line shows the change in torque process that exists in the former driving solution.The curve that dotted line draws shows the change in torque process that realizes under the driver element with noncircular gear that uses according to prescription of the present invention.Can both reduce torque load widely on the front and on negative thus.Make the load of driving element little and also realized when not making the mechanical organ overload, improving the combing period thus.

By this gear stage with noncircular gear being used for the driving heterogeneous of first sun gear of differential gear, because the designability freely in this gear stage can provide best driving standard thus, so that the advantage that acquisition has been stated.

Claims

1. be used to produce the detaching roller (A1 that is used for combing machine, the drive unit of paces motion at intermittence A2), described detaching roller is connected with the output shaft (9) of differential gear (1) through driving mechanism (Z1-Z3), the disc of the rotatably support of differential gear (2) by at least one by the driving element (20 that drives with constant rotating speed, Z) drive, wherein said differential gear (1) has second gear stage (G2), it is by being fixed on the sun gear (S2) on the output shaft (9) un-rotatably and forming through the planetary gear (U4 to U6) that axle (33 to 35) is rotatably supported in the disc (2), and first gear stage (G1) is set, it has planetary gear (U1 to U3), described planetary gear is gone up with the axle (33 to 35) that them were arranged and be fixed on un-rotatably to the planetary gear (U4 to U6) of second gear stage (G2) coaxially respectively and is driven with another sun gear (S1) and is connected, it is fixed on the driving shaft (5) of rotatably support un-rotatably, described driving shaft is by a driver element (4, G3) drive with a kind of rotational motion heterogeneous, it is characterized in that, described driver element has noncircular gear (42 by one, 43) gear stage (G3) forms, and this gear stage is transformed into rotational motion heterogeneous with the uniform rotational motion of main drive (HA).

2. according to the described drive unit of claim 1, it is characterized in that, the driving element that is used for disc (2) is made up of a driving shaft (20), fix a gear (Z) thereon un-rotatably, described gear drives indirectly or directly with the disc wheel (3) of the disc (2) of differential gear (1) and is connected.

3. according to the described drive unit of claim 2, it is characterized in that, described driving shaft (20) has another driving wheel (16), it drives with the driving element (18) of main drive (HA) and is connected, described driving element also drives with the gear stage with noncircular gear (42,43) (G3) simultaneously and connects.

4. according to the described drive unit of claim 3, it is characterized in that, the driving element of main drive (HA) is made up of the gear (18) that is rotatably supported in the frame (MS), it is through other mechanism (19,38, G, 40) drive by a center driven motor (M), the rotation (48) of its middle gear (18) with have a noncircular gear (42, the power shaft (44) of gear stage 43) (G3) extends coaxially and described another driving wheel of driving shaft (20) is configured to gear (16), and it drives with the gear (18) of main drive (HA) and is connected.

5. according to the described drive unit of claim 4, it is characterized in that the power shaft (44) with gear stage (G3) of noncircular gear (42,43) is connected with the gear (18) of main drive (HA) un-rotatably through knock-down fixed mechanism (24).

6. according to the described drive unit of claim 5, it is characterized in that, guiding mechanism (30) is set in the zone of fixed mechanism (24), and their allow to be adjusted in the rotational angle between the gear (18) of power shaft (44) and main drive (HA) when unclamping described fixed mechanism (24).

7. according to the described drive unit of claim 2, it is characterized in that described gear (Z) is through fixed mechanism (22,23,24) removable turning up the soil is fixed on that driving shaft (20) is gone up and mechanism (30,24) adjustment can be passed through in the angle position between driving shaft (20) and gear (Z).

8. according to the described drive unit of claim 2, it is characterized in that, described disc wheel (3) is gone up and is seen on the circumferencial direction of disc (2) and can adjust its angle position with respect to disc through governor motion (12,14) through the removable disc (2) that is fixed on differential gear (1) of turning up the soil of mechanism (13).