CN106167931B

CN106167931B - Load carrier for an upper roller of a drafting device and compression spring

Info

Publication number: CN106167931B
Application number: CN201610331303.0A
Authority: CN
Inventors: K·胡贝尔
Original assignee: Maschinenfabrik Rieter AG
Current assignee: Maschinenfabrik Rieter AG
Priority date: 2015-05-18
Filing date: 2016-05-18
Publication date: 2021-03-30
Anticipated expiration: 2036-05-18
Also published as: DE102015109269A1; CN106167931A

Abstract

A load carrier for the upper rollers of a drafting system of a textile machine, the upper rollers forming the input rollers, the intermediate rollers and the output rollers of the drafting system. The load carrier has a guide rail and at least one bridge section which is rotatably mounted in the guide rail about a rotational axis, and at least one upper roller of the drafting device is fixed to the bridge section. A transmission device is arranged on the bridge part, and an input roller of the drafting device and a clamping roller of the compacting device are arranged in the transmission device and are in transmission connection with each other. The guide rail and/or the bridge have at least one opening in which the rotary shaft is accommodated. The output roller is arranged on the bridge, in particular by means of a loading device. The clamping rollers are loaded in their operating position by means of compression springs, and the compression springs are arranged in openings of the guide rails and/or the bridges, preferably on the rotational shaft. The compression spring has a receptacle for fastening in the guide rail and a pressure surface for loading the clamping roller in its operating position, and also has a positioning surface for supporting the compression spring in the operating position on the guide rail of the load carrier.

Description

Load carrier for an upper roller of a drafting device and compression spring

Technical Field

The invention relates to a load carrier for an upper roller of a drafting device of a spinning machine and a compression spring for such a load carrier, wherein the upper roller forms an input roller, an intermediate roller and an output roller of the drafting device, having a guide rail and at least one bridge (Bruckel) which is rotatably mounted about a rotational axis in the guide rail, on which bridge at least one upper roller of the drafting device is fixed and wherein a transmission is provided on the bridge, in which transmission the output roller of the drafting device and a clamping roller of a compacting device are arranged and are in driving connection with one another, and wherein the guide rail and/or the bridge has at least one opening, in which the rotational axis is accommodated and on which the output roller is arranged by means of the load device.

Background

Load carriers of this type for the upper drum of a drafting device of a spinning machine are generally known. These load carriers are used in particular in ring spinning machines, in which a fiber strand is drawn and subsequently spun into a thread. Spinning machines of this type, which are particularly high in quality, have an additional compacting device which is arranged downstream of the drafting device and upstream of the actual spinning device and compacts the drawn fibers. This results in a strong yarn with a higher quality.

A conventional compacting device has a nip roller, which presses the already stretched fiber strand against a suction device. The nip roller is driven by a drive mechanism via a delivery roller of the drafting device. The drive has a drive mechanism, an output roller and a clamping roller in a housing and is sold, for example, under the product name EliTop. The transmission is supported in a manner rotatable about the output roller. When the load carrier is closed, i.e. when the upper roller presses on the corresponding lower roller of the drawing unit, the output roller is also pressed against the output lower roller and the clamping roller is pressed against the suction device via the corresponding housing edge. The disadvantage here is that the pressure of the load arm directed towards the output upper roll must be distributed over the output upper roll as well as the pinch rolls. This results in an unfavorable pressure ratio in some applications, which leads to an undesirable textile result.

Disclosure of Invention

The object of the invention is to provide a load carrier and a corresponding pressure spring, by means of which the pressure of the clamping roller on the suction device can be optimally obtained.

This object is achieved by the features of the independent claims.

The invention relates to a load carrier for an upper roller of a drawing device of a textile machine, wherein the upper roller forms an input roller, an intermediate roller and an output roller of the drawing device. Depending on the type of drafting device, there can be possibly more intermediate rollers. The load carrier is part of the drafting device and serves to support the upper roller on the lower roller of its corresponding drafting device and to press it with a defined force. This force is required to ensure a defined drawing of the fiber strand introduced into the drawing frame.

The load carrier has a guide rail and at least one bridge which is rotatably supported about a rotational axis in the guide rail. At least one upper roller of the drafting device is fixed on the bridge. Furthermore, a transmission device is arranged on the bridge, in which a delivery roller of the drafting device and a clamping roller of the compacting device are arranged and are in driving connection with each other. The clamping roller of the compacting device presses the fiber assembly from the delivery roller of the drawing frame onto the compacting device (which can usually be operated pneumatically or also mechanically) and clamps the compacted fiber assembly, which is then guided to the weaving device. The drive of the nip rollers is usually effected by means of belt or gear drives, which are connected to the rotating output rollers of the drawing frame.

The guide rail and/or the bridge have at least one opening in which the rotary shaft is accommodated. The bridge is thereby pivoted in a position inside the guide rail and exerts a predetermined pressure on the upper roller or the upper roller on the lower roller. The rotary shaft can be passed through two openings of the guide rail and the bridge or fixed to one of the two components, for example as a journal.

At least the output roller is arranged on the bridge, in particular by means of a loading device. The loading device is usually designed in such a way that it holds the delivery roller on the bridge and on the other hand can also exert a pressure on the delivery roller by the guide rail or the load carrier. However, the upper roller can also be fixed directly to the load carrier.

According to the invention, the clamping roller is loaded in its operating position by means of a pressure spring and the pressure spring is arranged in an opening of the guide rail and/or in an opening of the bridge, preferably at the rotational axis. If the pressure spring is fixed in one of the openings, an individual adjustment of the spring pressure on the load device can be achieved by a varying lever arm. By fixing the pressure spring on the rotary shaft on one of the bridges, a particularly simple possibility for fixing the spring is achieved.

The pressure spring according to the invention ensures that the clamping roller can be pressed against a component of the compacting device, such as a suction tube, as far as possible independently of the delivery roller. The pressure of the pinch roller is thus selected according to the arrangement or strength of the pressure spring without substantially affecting the pressure of the output roller. By providing a pressure spring in the opening of the guide rail and/or in the opening of the bridge or on the rotational shaft of the bridge, retrofitting in the presence of a load carrier can be achieved very simply. It is possible to use already existing openings to the guide rails and/or bridges or to use the rotational axes of already existing bridges in order to provide pressure springs there and to exert as far as possible a pressure on the clamping roller independent of the outfeed roller. The load carrier with the transmission (transmission with the delivery roll and the nip roll) is therefore easily modified and an improved and more uniform fiber strand is thereby achieved. Thereby enabling the spinning of more uniform and stronger threads. Furthermore, the pressure spring and the load device can be exchanged very simply. If the load device is merely placed against the spring, it can be removed independently of the spring from its attachment to the bridge. For replacing the compression spring or for replacing the compression force thereof, the compression spring is removed from its support in the first opening and is fixed again in the other opening.

It is particularly advantageous when the pressure spring bears on the guide rail. A defined spring path is thereby achieved and the pressure on the clamping roller can be obtained in a preset manner. The lever arm of the compression spring reaches from the support position on the guide rail up to the contact point of the compression spring on the housing of the gear mechanism and can be realized independently of the fastening of the compression spring in the opening of the guide rail and/or of the bridge or independently of the fastening of the rotary shaft. Since the support point of the pressure spring on the guide rail is usually between the opening or the contact point of the rotation shaft with the pressure spring on the housing of the gear, a more or less rigid pressure spring can be obtained thereby.

If two bridges are advantageously provided on the guide rail, wherein an infeed roller and a second bridge are provided on the first bridge, and an intermediate roller with a drive and an outfeed roller are provided on the second bridge, a pendulum mechanism (penderk) is obtained, by means of which the drive of the individual upper rollers on their lower rollers can be adjusted very specifically. The two bridges are configured in such a way that they can be rotated relative to each other and relative to the guide rail. The upper roller is thereby adjusted according to the lower roller and the pressure can be applied in a particularly uniform and targeted manner.

If, in a particularly preferred embodiment, the first bridge is arranged in the guide rail so as to be rotatable by means of a first rotational axis and the second bridge is arranged on the first bridge so as to be rotatable by means of a second rotational axis, this likewise leads to a desired pressure equalization of the upper roller on the lower roller.

If the first bridge part and the second bridge part advantageously have a plurality of openings for receiving the rotary shaft, the individual levers can be adjusted in this way and the force distribution can be adjusted as desired depending on the application and the fibrous material to be processed.

If the compression spring is advantageously arranged on the first rotational shaft or on an empty one of the openings of the first bridge which is not currently occupied by the rotational shaft, it can be connected directly to the guide rail and can thus exert a targeted and uniform force on the gear or its housing and thus on the clamping roller.

If the gear is arranged so as to be rotatable about the delivery roller, it is thereby ensured in a particularly advantageous manner that a simple and defined fixing of the gear is used and thus the loading of the clamping roller is achieved as independently of the delivery roller as possible.

In order to limit the rotation of the gear mechanism about the output roller, a stop is preferably provided on the gear mechanism and/or on the load device. This avoids the transmission, in the unloaded state, swinging unhindered about its axis of rotation (i.e. generally about the output roller) and thus having to be adjusted with the load carrier closed. By means of the stop, it is ensured that the load carrier can be closed without further operation at the transmission and thus that both the outfeed roller and the clamping roller autonomously reach the correct position.

If an upper roller and a clamping roller are provided at the load carrier for two drafting devices running parallel, a conventional load carrier can be advantageously configured according to the invention. The load carrier thus supports the double rollers, wherein the rollers are connected to a shaft and the shaft is held directly or indirectly in the guide rail. The respective upper roller is thus open on the guide rail side and interacts with the corresponding lower roller of the adjacent drafting device.

In a particularly advantageous embodiment, the compression spring is embodied as a leaf spring. The leaf spring is sufficiently strong in this case that it can press the clamping roller against the compacting device, in particular against the suction tube. Furthermore, the leaf spring can be easily assembled and positioned due to its wide and flat shape.

The corresponding compression spring according to the invention for the load carrier has, as described above, a receptacle for fastening in the guide rail and a pressure surface for loading the clamping roller in its operating position. According to the invention, the compression spring has a positioning surface for supporting it in an operating position on the guide rail of the load carrier. The positioning surface has the advantage that a length between the positioning surface on the guide rail and a contact point of the pressure spring at the housing of the transmission is defined. This enables a defined force to be exerted on the gear and thus on the clamping roller in a targeted manner. A sufficiently large pressure is thereby achieved irrespective of the fixed position of the guide rail.

The compression spring is advantageously constructed according to the above description of the load carrier, wherein the mentioned features can be present individually or in any combination.

The pressure spring is preferably embodied in a curved manner between its positioning surface and its pressure surface. This ensures better positioning and stability of the compression spring in the guide rail.

It is particularly advantageous if the receiving means is a ring, if a compression spring can be arranged in one of the rotational axes of the load carrier, in particular in a rotational axis fixed in the guide rail. The rotary shaft is passed through the ring and fixed in the opening of the guide rail or bridge. The pressure spring is thereby also advantageously fixed accordingly.

It is particularly advantageous if the positioning surface is arranged between the receptacle of the compression spring and the pressure surface of the compression spring. The force of the pressure spring on the clamping roller is thus determined geometrically by the distance between the positioning surface and the pressure surface.

Drawings

Other benefits of the present invention are illustrated in the examples below. Wherein:

FIG. 1: a vertical longitudinal section through a load carrier according to the invention is shown; and

FIG. 2: a longitudinal section through a level of the load carrier according to fig. 1 is shown.

Detailed Description

Fig. 1 shows a longitudinal section through a load carrier 1 according to the invention. The load carrier 1 has a guide rail 2, a first bridge part 3 and a second bridge part 4. The first bridge 3 is arranged on the guide rail 2 so as to be rotatable by means of a rotary shaft 5. The rotary shaft 5 is in this case fixed in one of the three openings 6 and thereby causes the first bridge 3 to be rotatably supported in the guide rail 2. The second bridge 4 is rotatably connected to the first bridge 3 by means of a further rotation shaft 7 in one of the three openings 8. Openings 6 and 8 are preferably provided in the first bridge 3 and the guide rail 2 or in the second bridge 4 and the first bridge 3, respectively, in order to facilitate the connection between the rotary shaft 5 or the rotary shaft 7 as the first bridge 3 and the guide rail 2 or the second bridge 4 and the first bridge 3. Depending on the positioning of the rotational axis 5 or 7, further levers and thus further pressure forces on the upper roller on which the load carrier 1 is arranged can be generated.

The upper rollers are shown as an input roller 9, an intermediate roller 10 and an output roller 11 in the case of the present load carrier 1. The input roller 9 is fixed to the first bridge 3 by means of a bracket 12. The intermediate roller 10, wound by a belt 13, is fixed to the second bridge 4 by means of a bracket 14. Likewise, the delivery roller 11 can also be fixed to the second bridge 4 by means of the bracket 15. Between the second bridge 4 and the output roller 11 a load device 16 is arranged, which load device 16 causes a force transmission from the second bridge 4 to the output roller 11. For loading the feed roller 9 and the intermediate roller 10, a loading device can also be provided in a similar manner, which is not shown here.

The outfeed roller 11 is arranged in a transmission 18 together with the pinch roller 17. The pinch roller 17 is in driving connection with the output roller 11 via a drive mechanism, not shown. The gear mechanism causes a corresponding rotation of the output roller 11 in accordance with the set gear ratio when the clamping roller 17 rotates. For this purpose, the clamping roller 17 is pressed against a compacting device, not shown, in order to be able to pneumatically or mechanically compact the fiber strand.

The transmission 18 is arranged in a rotatable manner about the shaft 24 of the output roller 11, as indicated by the double arrow. The clamping roller 17 can thus be pressed against the compacting device independently of the delivery roller 11. In order to avoid an unintentional further rotation of the clamping roller 17 about the output roller 11, a stop 19 is provided on the gear 18. The stop 19 in the exemplary embodiment not shown stops, for example, at the support 15, when the gear 18 or the clamping roller 17 has rotated too much about the delivery roller 11. Whereby the side of the garment is supported by the nip roller on the compacting means. On the other hand, in the case of an opened load carrier 1, i.e. when the upper roller is lifted from the corresponding lower roller, an excessive rotation of the gear 18 about the delivery roller 11 can be avoided, as a result of which an exact positioning of the clamping roller 17 in the region of the compacting device is achieved in the case of a renewed feeding of the load carrier 1 to the lower roller of the drafting device.

A pressure spring 20 is provided on the rotary shaft 5 connecting the first bridge 3 and the guide rail 2. The pressure spring 20 has at its first end an annular ring 21, through which ring 21 the rotary shaft 5 passes. The ring 21 contributes to a rotatable receiving portion of the compression spring 20. The other end of the pressure spring 20 has a pressure surface 22. The pressure surface 22 presses against the gear 18 and thus against the clamping roller 17 in the downward direction, i.e. in the direction of the compacting device. The pressure spring 20 thus exerts an elastic force on the clamping roller 17 and on the compacting device. This results in a predetermined pressing of the fiber strand against the compacting device.

The compression spring 20 additionally has a positioning surface 23. The positioning surface 23 bears against the pressure spring 20 on the guide rail 2. This causes a defined spring force on the gear 18. The pressure spring 20 is bent between the positioning surface 23 and the pressure surface 22. This bending serves to stabilize the compression spring 20 and the intended force transmission on the gear 18.

The fastening of the compression spring 20 in the opening 6 of the first bridge 3 or of the guide rail 2 allows different lever arms on the gear mechanism 18 to be adjusted. The distance between the pressure surface 22 and the axis of rotation 24 on the output roller 11 is thereby increased or decreased, resulting in different forces on the gear 18 or the clamping roller 17. In another embodiment of the compression spring 20, the compression spring 20 can also be fastened to the rotary shaft 7 or one of the openings 8. However, when the compression spring 20 is fixed on the first bridge 3 or on the guide rail 2, the movability of the second bridge 4 relative to the first bridge 3 is facilitated, since in other cases the movability of the two bridges may be limited.

In fig. 2 a horizontal cross-section through the load carrier 1 shown in fig. 1 is shown. In this view, it can be seen in particular that the corresponding upper roller is a twin roller which can be used for two drafting devices arranged parallel to one another. The load carrier 1 is thus used for the upper rollers of the press of two drafting devices arranged in parallel. The first bridge 3 is supported on the guide rail 2 so as to be rotatable by a rotary shaft 5. The second bridge 4 is in turn rotatably supported on the first bridge 3 by means of a rotary shaft 7. On the rotary shaft 5 is a compression spring 20, which is designed as a leaf spring having a small thickness and a significantly larger width. The compression spring 20 is fixed to the rotary shaft 5 in a ring 21. The pressure spring 20 presses the transmission 18 about the rotational axis 24 of the output roller 11 in the direction of the compacting device below the clamping roller 17.

The feed rollers 9 and 9 ' and the intermediate rollers 10, 10 ' with their belts 13, 13 ', the take-off rollers 11, 11 ' and the nip rollers 17, 17 ' are each fixed in the load carrier 1 and are jointly fed to the lower rollers of the two parallel drafting devices with the load carrier 1 closed.

The invention is not limited to the embodiments shown and described. Variants within the scope of the claims, such as combinations of features, are likewise possible, even if such variants are not shown and described in different embodiments.

Description of the reference numerals

1 load carrier

2 guide rail

3 first bridge part

4 second bridge part

5 rotating shaft

6 opening

7 rotating shaft

8 opening

9 input roller

10 intermediate roll

11 delivery roll

12 support

13 leather belt

14 support

15 support

16 load device

17 nip roll

18 driving device

19 stop part

20 pressure spring

21-ring

22 pressure surface

23 positioning surface

24 rotating shaft

Claims

1. A load carrier for a drafting device of a textile machine, having an input roller (9), an intermediate roller (10) and an output roller (11), having:

-a guide rail (2) and

at least one bridge (3; 4),

at least one upper roller of the drafting device is fixed on the bridge part, and

wherein a transmission (18) is arranged on the bridge,

wherein:

-an output roller (11) of the drafting device and

-a clamping roller (17) of a compacting device

Are arranged in the transmission device and are in transmission connection with each other,

the output roller (11) is arranged on the bridge (3; 4) by means of a loading device (16) and

-the clamping roller (17) is loaded in its working position by means of a pressure spring (20),

it is characterized in that the preparation method is characterized in that,

the bridge (3; 4) is rotatably mounted about a rotational axis (5; 7) arranged in the guide rail (2),

the guide rail (2) and/or the bridge (3; 4) has at least one opening (6; 8) in which a rotary shaft (5; 7) in the guide rail (2) is accommodated and in which a rotary shaft (3; 7) is accommodated

The pressure spring (20) is arranged in an opening (6; 8) of the guide rail (2) and/or of the bridge (3; 4).

2. Load carrier according to claim 1, characterized in that the pressure spring (20) is arranged at the rotation axis (5; 7).

3. The load carrier according to the preceding claim, characterized in that the pressure spring (20) is supported on the guide rail (2).

4. Load carrier according to claim 3, characterized in that two bridges are provided on the guide rail (2), wherein an input roller (9) and a second bridge (4) are provided on a first bridge (3) and an intermediate roller (10) and an output roller (11) with the transmission (18) are provided on the second bridge (4).

5. The load carrier according to claim 4, characterized in that the first bridge (3) is rotatably arranged in the guide rail (2) by means of a first rotation shaft (5) and the second bridge (4) is rotatably arranged on the first bridge (3) by means of a second rotation shaft (7).

6. The load carrier according to claim 5, characterized in that the first bridge (3) and the second bridge (4) have a plurality of openings (6; 8) for receiving their own rotation shafts (5; 7).

7. The load carrier according to claim 6, characterized in that the pressure spring (20) is arranged on the first rotation shaft (5) or at one of the openings (6) of the first bridge (3).

8. Load carrier according to claim 1, characterized in that the transmission (18) is arranged in a rotatable manner around the output roller (11).

9. Load carrier according to claim 1, characterized in that a stop (19) is provided at the transmission (18) and/or the load means (16) in order to limit the rotation of the transmission (18) around the output roller (11).

10. Load carrier according to claim 1, characterized in that an upper roller and a nip roller (17) are provided at the load carrier (1) for two parallel arranged drafting devices.

11. The load carrier according to claim 1, wherein the pressure spring (20) is a leaf spring.

12. The load carrier of claim 1,

the compression spring (20) has a receptacle for fastening in the guide rail (2), a pressure surface (22) for loading the clamping roller (17) in its operating position, and a positioning surface (23) in order to be supported in its operating position on the guide rail (2) of the load carrier (1).

13. Load carrier according to claim 1, characterized in that the pressure spring (20) is curved between its own positioning surface (23) and its own pressure surface (22).

14. The load carrier according to claim 12, characterized in that the receiving portion is an annular ring (21) in which the rotational shaft (5; 7) can be arranged.