CN111850751A

CN111850751A - Bearing mechanism for apron drafting device

Info

Publication number: CN111850751A
Application number: CN202010337680.1A
Authority: CN
Inventors: 约亨·德雷森
Original assignee: Zhuolang Intelligent Technology Co Ltd
Current assignee: Zhuolang Intelligent Technology Co Ltd
Priority date: 2019-04-26
Filing date: 2020-04-26
Publication date: 2020-10-30
Anticipated expiration: 2040-04-26
Also published as: JP2020183606A; PT3730682T; CN111850751B; BR102020008153A2; EP3730682A1; US20200340150A1; DE102019110880A1; EP3730682B1; MX2020004274A

Abstract

The invention relates to a support device for a apron drafting system, comprising a first support and a second support, which are each designed to detachably receive a apron bridge and/or a rotatably mounted drafting roller. In order to provide a support mechanism for a apron drafting device and a apron drafting device of a spinning machine, which allow for a quick change of the apron, in the support mechanism, a first support has a socket part and a guide part detachably connectable to the socket part, the guide part has a support hole for rotatably mounting the drafting roller and a first receiving hole for receiving the first support part of the apron.

Description

Bearing mechanism for apron drafting device

Technical Field

The invention relates to a support mechanism for a apron drafting device of a spinning machine, comprising a first support and a second support, which are respectively designed to detachably receive a apron bridge and/or rotatably mount a drafting roller.

Background

Various embodiments of drafting devices for spinning machines are known from the prior art. They are used to draw or draft a sliver of fiber, thereby causing a transverse reduction of the fiber. The fibres must be moved side by side as uniformly as possible during drafting to obtain a uniform sliver of fibres, which is a prerequisite for the production of a uniform yarn.

For drawing the fiber strand, the drawing frame generally has a plurality of roller pairs arranged one behind the other, which clamp the fiber strand passing between them in an abutting arrangement. A roller pair is usually formed by a driven lower roller and an upper pressure roller which bears against the lower roller. The drafting of the fibre sliver is obtained in such a way that the circumferential speed increases between the roller pairs in the transport direction of the fibre sliver determined by the direction of rotation of the roller pairs.

The driven rollers are each arranged on a support, in particular a drafting device carriage, which, arranged one after the other in the transport direction of the fiber sliver, form the drafting device lower part of the drafting device. After the fibers of the fiber sliver have lost their binding, in particular in the main drafting zone, in which the fiber sliver is drafted with a large draft value, it is known to design the drafting device as a apron drafting device, in which the fiber sliver is guided through the apron between the nip lines of two drafting roller pairs. In this case, a so-called double apron drafting system is particularly widespread, in which a apron is guided around a first upper roller and a lower roller in each case in the region of the main drafting zone, the apron being deflected by a deflection mechanism from the fibre feed direction into the return direction as far as the second roller pair, so that the fibre sliver is guided between the upper and lower apron.

In general, a apron in the form of an endless belt, as disclosed for example in EP2034060a1, is guided at least around a lower drivable roller, a steering mechanism and a tensioning device, which tensions the lower apron to a pretensioning force required for operation. The lower apron can be driven by a drivable lower roll, wherein the transmission of the drive torque from the roll to the apron is generally ensured by a force transmission co-operation with the upper apron or the upper roll.

Important for the yarn quality is the fiber guiding or drawing quality of the fiber sliver, wherein a uniformly spun yarn is obtained by uniformly drawing the fiber sliver. After the lower apron has to be pressed against the upper apron or upper roller, if any, in order to draw the fiber sliver in the region of the main drawing zone, abrasion occurs at the surface contacting the fiber sliver, which is caused by friction. As the wear increases, the quality of the spun yarn is increasingly adversely affected, and in this case, in particular in the case of vertical drafting devices, serious disadvantages occur, so that the apron must be replaced frequently.

In the known drafting devices, the apron change is removed and replaced by the need for a large number of components, involving considerable time consumption, in which it is not practical to equip the spinning stations with the relevant apron drafting devices.

Disclosure of Invention

Starting from this, the invention is based on the object of providing a support device for a apron drafting device and a apron drafting device of a spinning machine, which allow rapid apron changing.

The invention accomplishes this task by means of a support device and a apron drafting device.

The support mechanism of the invention is characterized in that the first support element has a socket element and a guide part which can be detachably connected with the socket element. The guide part is provided with a bearing hole for rotatably mounting the drafting roller and a first accommodating hole for accommodating the first bearing part of the apron bridge.

The support means according to the invention has two support elements which can be arranged at a distance from one another and which can preferably be arranged on the base of the support means. The second support element is designed for detachably receiving the apron bridge and/or for rotatably mounting the drafting roller, while the first support element is designed at least in two parts and has a socket element, which can be connected in particular to the base, and a guide part, which can be detachably connected to the socket element. The guide has a bearing opening for the rotatable mounting of the drafting roller and a receiving opening for receiving the first bearing of the apron. The support element is divided into two parts, where the socket element is preferably fixedly connectable to the base, by detachably mounting the guide on the socket element, allowing easy mounting and dismounting of the guide as required. The guide part has a support hole for rotatably mounting the draft roller, and a bearing of the draft roller, for example, can be detachably accommodated in the support hole. The guide also has a first receiving opening which is suitable for receiving a first support of the apron bridge, so that the apron bridge is supported on the first support by means of the first support.

The possibility of separating the guide from the receptacle part allows the apron surrounding the drafting rollers and the apron bridge to be replaced in a simple manner if required. After the removal of the guide from the socket part, the drafting roller and the apron bridge are freely accessible on one side, so that the apron to be replaced can be simply pulled out by a certain accessibility via the subsequently freed ends of the apron bridge and the drafting roller. The new apron can then be placed again easily on the apron bridge and the drawing rollers and tensioned. After the new apron has been placed, the guide is mounted on the receptacle part, wherein in the operating position which then exists, the first support of the apron bridge is again placed in the second receiving opening and the drawing roller is again rotatably placed in the support opening.

The support device according to the invention allows a very simple and quick change of the apron on the drafting device carriage after easy accessibility of the apron is obtained by the simple removal possibility of the guide. In contrast to the apron drafting devices known from the prior art, there is thus the possibility of relatively quickly putting the spinning stations of the textile machine to which the respective drafting device belongs into operation again.

The design of the connection of the guide to the socket part can in principle be combined freely, wherein this is designed such that, on the one hand, a secure position locking of the apron bridge and the drafting rollers in the operating position is achieved, but at the same time, a simple and rapid removal is also possible. However, according to an advantageous embodiment of the invention, it is provided that the guide part is detachably connected to the receptacle part in the operating position by means of linear guide means, in particular dovetail guides, oriented in the direction of the longitudinal axes of the drafting rollers and of the apron bridge.

The use of a linear guide mechanism for the guide in the operating position on the receptacle ensures a particularly secure seating of the drafting roller and the apron on the first support. The guide part is particularly reliably prevented from being displaced relative to the receptacle part by the form fit of the linear guide, in particular the dovetail guide, in the transverse direction of the longitudinal axis of the drafting roller and the apron bridge in the operating position, so that a secure rotatable mounting of the drafting roller and a positionally fixed mounting of the apron bridge are ensured. In addition, the linear guide provides a guided displacement of the guide part relative to the receptacle part, which is oriented in the direction of the longitudinal axis of the apron bridge and the drafting rollers, so that a deflection of the guide part during installation and removal on the receptacle is reliably prevented.

In order to function as a support means, which can preferably be formed as a carriage of the drafting system, it is advantageous to place the drafting rollers and the apron bridge in a stationary manner in the operating position, for which it is conceivable to place the guide in a stationary manner on the receptacle part in the operating position. This can in principle be produced in any way. However, according to a particularly advantageous embodiment of the invention, a locking element, in particular a locking screw, is provided for locking the guide part to the receptacle part in the operating position. For the locking of the position of the guide on the socket part, any locking means can be used, for example also spring-loaded locking means or clips, which in the operating position fix the guide on the socket part. The use of a locking screw which enters the socket part, for example through a part of the guide and can be screwed into the socket part, allows the position of the guide on the socket part to be locked in a particularly reliable manner. The use of locking screws is characterized by a low space requirement and low costs.

The arrangement of the second support of the apron bridge, which is opposite the first support of the apron bridge, on the second support, which is preferably connectable to or can be arranged on the base, is in principle freely selectable. The apron bridge can thus be bolted to the support in a simple design, for example, in order to ensure a secure positional fixing of the apron bridge on the second support in a reliable manner.

According to a particularly advantageous embodiment of the invention, it is provided that the second bearing part for the detachable accommodation of the second bearing part of the apron bridge has a second accommodation opening with a lead-in chamfer running obliquely to the accommodation axis, wherein the accommodation axis is formed in the operating position of the apron bridge by the axis connecting the first and second accommodation openings, and the second bearing part also has a first locking element spaced apart from the lead-in chamfer and delimiting the second accommodation opening, wherein in the operating position the first locking element can be brought into engagement with a complementary second locking element on the second bearing part, wherein the second bearing part of the apron bridge is movable in the second accommodation opening between the operating position and a release position in which the first locking element and the second locking element are disengaged.

According to a preferred embodiment of the invention, the placing of the apron bridge on the support means is first carried out by placing the second support on the second support. In this case, the apron bridge, which is oriented at an angle with respect to a receiving axis, which extends parallel to the longitudinal axis of the apron bridge and/or of the drawing roller in the operating position of the support means, is inserted with the second bearing along a lead-in ramp, which extends at an angle with respect to the receiving axis, into the second receiving opening of the second bearing. In the inserted state, the rotation of the apron bridge to a position in which the apron bridge is oriented parallel to the drawing roller then takes place as a result of the possibility of rotation obtained by designing the second receiving opening with a lead-in bevel.

In this position, the apron bridge rests with a part of the second support part preferably on a shoulder of the second support part. In addition, a first locking element, preferably in the form of a locking body projecting toward the insertion ramp, is in engagement with a second locking element, preferably in the form of a locking groove, on the second support section, so that a displacement lock relative to the second support section is then provided in the direction of the longitudinal axis of the apron bridge or in the direction of the receiving axis. With respect to the apron bridge thus oriented, it is then possible in a simple manner to push the guide in the direction of the receiving axis or in the direction of the longitudinal axis of the apron bridge and to push the drafting roller, which is designed, for example, with a preferably predetermined linear guide, onto the first support and the free end of the drafting roller.

The design allows for simple and reliable placement and replacement of the apron on the second support as needed. By means of the rotary fit, which is preferably formed by the locking body and the locking groove, the apron bridge is also prevented from moving out of its position corresponding to the operating position when the guide is removed from the socket part. This design of the invention therefore simplifies the change of the apron in a complementary manner.

The design of the first and second locking elements can in principle be freely selected here. According to an advantageous embodiment of the invention, it is provided that the second locking element is designed as an elongated hole and/or that the first locking element is designed as a locking pin oriented perpendicularly to the longitudinal axis of the drawing roller. The use of a long hole-like locking member allows the adjustment of the apron bridge on the second support member so that an optimum orientation of the apron bridge can be achieved. The locking pin is characterized by a simple design and high functional reliability. Alternatively, the locking pin can be arranged with the apron bridge and the elongated hole can be arranged with the second bearing.

The arrangement of the drawing roller with its end opposite the first support can in principle be carried out in any way, for example also on the second support. According to a particularly advantageous embodiment of the invention, it is provided that the support means are designed to support a drive, wherein the drafting roller is mounted on the drive in a stationary manner at the end opposite the first support. The possibility of mounting the drawing roller directly on a drive which can be arranged on the support, in particular on the base, also ensures a secure position locking of the drawing roller on the support in the detached state of the guide. In addition, it is possible to dispense with a separate mounting on the support opposite the first support by mounting the drafting roller directly on the drive. In a particularly advantageous manner, the second bearing can be formed in one piece with the drive housing, as a result of which a very compact design is obtained.

According to a further preferred embodiment, the carrying means can form an at least partially assembled unit according to one of the previously described preferred embodiments. Thus, for example, the first support and/or the second support can be arranged at a distance from one another on the base and/or be connected at a distance from one another to the base. In particular, the socket member of the first support member can be connected to the base. The guide portion can also be detachably connected to the socket member. The same applies correspondingly to a linear guide mechanism, for example in the form of a dovetail guide, a drafting roller which can be mounted on the drive, a apron bridge which is mounted so as to be longitudinally displaceable along the receiving axis, and a first and a second locking element which can be brought into engagement.

According to another aspect of the invention, a apron drafting device is provided. The apron drafting device according to the invention for a spinning machine, in particular a rotor spinning machine, has a support means with a lower apron guided by a drivable lower roller, which is supported in the region of a main drafting zone by a sliding section of an apron bridge, and is characterized in that the support means is designed according to one or more of the aforementioned embodiments, in particular is designed such that the first support element has a socket part connected to the base and a guide part detachably connected to the socket part, and the guide part has a support opening for the rotatable mounting of the drafting roller and a first receiving opening for the first support element of the apron.

A feature of a correspondingly designed apron drafting device is that it allows a particularly simple and rapid exchange of worn aprons, wherein for this purpose, after the possibility of access to the support means has been provided, the guide only has to be removed from the socket part, as a result of which the possibility exists of extracting the apron to be exchanged via the subsequently freed end of the drafting roller and, during the rotation of the free end of the apron towards the drafting roller, extracting the apron in order to relieve the apron tension. Subsequently, a new apron can be placed on the drafting roller and tensioned again in a simple manner. The orientation and tension of the apron required for operation is then established by mounting the guide on the socket piece.

Drawings

An embodiment of the invention is described below with reference to the accompanying drawings, which show:

fig. 1 shows a perspective view of a drafting device carriage with a drafting roller and a apron bridge in the operating position;

figure 2 shows a perspective view of the drafting device carriage of figure 1 in a disassembled state of the first support and in a apron bridge moved-in position;

fig. 3 shows a perspective view of the drafting device carriage of fig. 1 in a partially rotated state of the apron bridge;

figure 4 shows a perspective view of the drafting device carriage of figure 1 in the working position of the apron bridge and the drafting rollers;

Fig. 5 shows a perspective view of a apron drafting device with a drafting device carriage according to fig. 1; and

figure 6 shows a perspective view of the lower part of the drafting device of the apron drafting device of figure 5.

List of reference numerals

1 apron drafting arrangement

2 lower part of the drafting device

3 input roller

4 first draft roller

5 second draft roller

6 output roller

7 roller driving mechanism

8a drafting device carriage (input roller)

8b drafting device sliding rack (first drafting roller)

8c drafting device carriage (second drafting roller)

8d drafting device carriage (output roller)

9 leather collar bridge

10 lower leather collar

11a first support

11b second support

12 socket piece

13 guide part

14 bearing hole

15 first accommodation hole

16 frame (lower part of drafting device)

17 base

18 leather collar guide mechanism

19 drafting device upper part

20 handle

21 latch hook

22 drafting device roller bearing

23 screw

24 opening

25 guide member

26 opening

27 first support (leather ring bridge)

28 second support (leather ring bridge)

29 second accommodation hole

30 lockpin (first locking piece)

31 shoulder

32 long hole (second locking piece)

Detailed Description

Fig. 5 shows a perspective view of a apron drafting device 1 of a spinning station, not shown here, of a spinning machine, which can be fastened to the spinning machine by means of a locking hook 21. The apron drafting device 1 has a drafting device upper part 19 which is articulated to the drafting device lower part 2, wherein the rotation is effected by operation of a handle 20.

In the operating position of the apron drafting device 1 shown in fig. 5, the upper drafting device part 19 bears with four upper rollers, which are arranged one behind the other in the direction of movement of the fiber sliver, not shown here, through the apron drafting device 1, against the corresponding driven

lower rollers

3, 4, 5, 6 of the lower drafting device part 2. The feed roller 3 which first comes into contact with the fibre sliver belongs to the

lower rollers

3, 4, 5, 6, which are driven by the roller drive 7 and form the first lower roller of the lower part 2 of the drawing frame. The feed roller 3 is mounted together with the roller drive 7 on a support 8a embodied as a drafting device carriage, which, as described below, is embodied as a

support

8b, 8c, 8d of a drafting device carriage in each case for connection to a frame 16 of the drafting device lower part 2 (see fig. 2).

A draft device carriage 8b is provided downstream of the draft device carriage 8a in the fiber sliver moving direction, and the first draft roller 4 and a roller drive mechanism 7 for driving the draft roller 4 are mounted on the draft device carriage 8 b. Further, a draft device carriage 8c having the second draft roller 5 and a roller drive mechanism 7 for driving the draft roller 5 is provided downstream of the draft device carriage 8b as viewed in the fiber sliver moving direction. In contrast to the drafting system carriage 8b, the drafting system carriage 8c also has a apron bridge 9, which is held with its mutually opposing bearing

parts

27, 28 on a first bearing part 11a and a second bearing part 11b connected to the base 17 of the drafting system carriage 8 c.

The lower apron 10 extends on the drafting device carriage 8c around the apron bridge 9 and the second drafting roller 5 and is used for the fibre sliver not to directly contact the second drafting roller 5. Finally, the drafting device carriage 8c is followed in the sliver transport direction by a drafting device carriage 8d, which has a delivery roller 6 driven by a roller drive 7, through which the drafted sliver leaves the apron drafting device 1.

For changing the lower apron 10, the first support 11a of the drafting device carriage 8c has a socket part 12 connected to the base 17 and a guide 13 which is detachably arranged on the socket part 12. In the operating position of the drafting device carriage 8c, as shown in fig. 1, the guide 13 is in its installation position as shown, the guide 13 here resting on the guide 25 of the socket part 12 through an opening, not shown here.

A screw 23, which is intended to lock the mounting position of the guide 13 on the socket part 12 as shown in fig. 1, can be screwed into a guide 25 on the socket part 12 through a hole 24 in the guide 13.

In the working position thus locked, the first support 27 of the apron bridge 9 is located in the consecutive first receiving opening 15 in the guide 13. Furthermore, a draft roller bearing 22 provided at one end of the draft roller 5 facing the roller drive mechanism 7 is located in a support hole 14 provided for the guide portion 13.

The change of the lower apron 10 (which is held in its position on the apron 9 and the drafting roller 5 by the apron guide 18 arranged on the base 17) is carried out by loosening the screws 23 and pulling the guide 13 out of the socket part 12 into the position shown in fig. 3. In this position, it is possible to pull the lower apron 10 smoothly and then via the drafting rollers 5 and the free end of the apron bridge 9, and then to place a new lower apron 10 on the drafting device carriage 8 c.

There is also the possibility of replacing the apron bridge 9. For this purpose, the apron bridge 9 is displaced by rotation into the position shown in fig. 2. The rotatability of the apron bridge 9 on the second support 11b results from the design of the second receiving opening 29 for the second support 28 of the apron bridge 9. The second receiving opening 29 therefore has a lead-in bevel which, in the position of removal of the apron 9 shown in fig. 2, allows the apron to be removed from the second receiving opening 29.

A new apron bridge 9 can then be placed again in the reverse order on the drafting device carriage 8c, wherein the apron bridge 9 with the second bearing 28 is inserted along the insertion slope into the second receiving opening 29 in the oriented position in fig. 2

The subsequent rotation through the intermediate position shown in fig. 3 for receiving the lower apron to the final position shown in fig. 4 results, in addition to tensioning the lower apron, in that a locking pin 30 formed as a first locking element on the second support 11b, which pin protrudes toward the receiving opening 29, engages in the position shown in fig. 2 with a slot 32 formed as a second locking element on the second support 28 of the apron bridge 9, as a result of which the apron bridge 9 is fixed in its position in the direction of the longitudinal axis of the drafting roller 6.

After the apron bridge 9 has been adjusted to the position shown in fig. 4 (in which it abuts the shoulder 31 of the second support 11b) and after the guide 13 has been slid onto the receptacle part 12, the drafting device carriage 8c can be put into use again.

Claims

1. A support mechanism (8c) for a apron drafting device (1) of a spinning machine, having a first support (11a) and a second support (11b) which are each designed for detachably receiving an apron bridge (9) and/or for rotatably mounting drafting rollers (4,5), characterized in that the first support (11a) has a receptacle (12) and a guide (13) which can be detachably connected to the receptacle (12), the guide (13) having a support opening (14) for rotatably mounting the drafting roller (5) and a first receiving opening (15) for receiving the first support (27) of the apron (9).

2. The support means (8c) according to claim 1, wherein the support means (8c) has a base (17) on which the first support element (11a) and the second support element (11b) can be placed at a distance from each other, wherein the socket element (12) can be connected to the base (17).

3. The support means (8c) according to claim 1 or 2, wherein the guide section (13) is detachably connectable to the receptacle part (12) in the operating position by means of linear guide means, in particular dovetail-shaped guide means, oriented in the direction of the longitudinal axes of the drafting roller (5) and of the apron bridge (9).

4. The carrying means (8c) according to one or more of the preceding claims, characterized in that a locking element, in particular a locking screw (23), is provided for locking the guide (13) on the socket element (12) in the working position.

5. The support means (8c) according to one or more of the preceding claims, characterized in that the second support element (11b) has, for the detachable reception of the second bearing section (28) of the apron bridge (9), a second receiving opening (29) with a lead-in chamfer running obliquely to a receiving axis, wherein the receiving axis is formed in the operating position of the apron bridge (9) by an axis connecting the first receiving opening (15) and the second receiving opening (29), and a first locking element (30) which is spaced apart from the lead-in chamfer and delimits the second receiving opening (29) and which can be brought into engagement in the operating position with a complementary second locking element (32) on the second bearing section (28), wherein the second bearing section (28) of the apron bridge (9) can be brought into and released engagement in the operating position in the second receiving opening (29) Is adjusted between a release position in which the first locking member (30) and the second locking member (32) are out of engagement.

6. The carrying means (8c) according to one or more of the preceding claims, characterized in that the second locking element is designed as an elongated hole (32) and/or the first locking element is designed as a locking pin (30) oriented perpendicularly to the receiving axis.

7. The support means (8c) according to one or more of the preceding claims, characterized in that the support means (8c) are designed for supporting a drive device (7), wherein the drafting roller (5) can be mounted in a stationary manner on the drive device (7) with its end opposite the first support (11 a).

8. The support means (8c) according to one or more of the preceding claims, wherein said apron bridge (9) is mounted in said working position on said first (11a) and second (11b) support members in a longitudinally movable manner along said containing axis.

9. Apron drafting arrangement (1) for a spinning machine, in particular a rotor spinning machine, having a carrying mechanism (8c) with a lower apron (10) guided by a drivable lower roll, which lower apron (10) is supported in the region of a main drafting zone by a sliding section of an apron bridge (9), characterized in that the carrying mechanism (8c) is designed according to one or more of the preceding claims.