CN112805421A

CN112805421A - Roller fastening device

Info

Publication number: CN112805421A
Application number: CN201980066251.0A
Authority: CN
Inventors: 托马斯·施密茨
Original assignee: Truetzschler GmbH and Co KG
Current assignee: Trutschler Group Europe
Priority date: 2018-10-12
Filing date: 2019-09-20
Publication date: 2021-05-14
Anticipated expiration: 2039-09-20
Also published as: CN112805421B; WO2020074239A1; DE112019005076A5

Abstract

The device (120) has a clamping section (124) and a roller section (126, 131, 127) having a drive section (131), a receiving section (126b) and a fastening section (123). The roller section (126) is in rotational operative connection with a drive element. The receiving section (126b) receives the roller (125) and is arranged downstream of the drive section (131) as viewed along the rotational axis of the roller section (126). The fastening section (123) is arranged downstream of the receiving section (126b) as viewed in the direction and has a fastening opening (123a) which is open toward the clamping side facing away from the receiving section (126b), extends toward the receiving section (126b) and is arranged outside the axis of rotation. The clamping section (124) rests from the clamping side onto the receiving section (126b) and has, for each fastening opening (123a), an associated through-opening (122a) which, viewed in the direction, is aligned with the fastening opening (123 a). The fastening elements (3) are inserted from the mounting side through the respective through-opening (122a) into the respective fastening opening (123a) in a force-fitting and/or form-fitting manner in such a way that the clamping section (124) is held on the roller (125). The rotational axes of the roller sections (126) of the two devices (120) of the measuring system (120) of the textile machine (100) extend parallel to one another and are spaced apart from one another, viewed in the direction.

Description

Roller fastening device

Technical Field

The invention relates to the fastening of rollers, in particular measuring rollers of a drafting system.

Background

Such rollers are constructed to be independent at one end. The roller is thus fixed so as to be freely rotatable about its axis of rotation, it being usual for a clamping sleeve to be slipped over the free end and fixed by means of a centrally arranged screw. However, the rotation of the roller during operation results in the fact that the screw can hardly be removed for changing the roller or can no longer be removed at all. The so-called starting torque for the removal has increased over time in such a way that the removal of the contact plates is considerably more difficult and the bearings of the respective contact plates are partially damaged, so that the bearings have to be replaced.

Disclosure of Invention

The aim of the invention is to overcome said disadvantages.

The object is achieved by the subject matter of the independent claims. Advantageous further developments are specified in the dependent claims.

According to the invention, a device having a roller section is provided. The roller section has a drive section, a receiving section and a fastening section. The roller section is designed to be rotationally operatively connected to a drive element. The receiving section is designed to receive the roller and is arranged downstream of the drive section, viewed in a predetermined direction along the rotational axis of the roller element. The fastening section is arranged or configured in a rotationally fixed manner relative to the drive section, is arranged downstream of the receiving section, viewed in a predetermined direction, and has at least one fastening opening which opens toward a clamping side facing away from the receiving section. The fastening opening extends towards the receiving section and is arranged outside the axis of rotation. The device further comprises a clamping section. The clamping section rests with the clamping side onto the fastening section and has for each fastening opening an associated through-opening which, viewed in a predetermined direction, is aligned with the associated one of the aforementioned fastening openings. Furthermore, the device comprises, for each fastening opening, a fastening element which is inserted into the respective fastening opening of the fastening opening from the mounting side facing away from the clamping side through the respective through-opening in a force-fitting and/or form-fitting manner in such a way that the clamping section is held on the roller. The provision of an eccentric device of the at least one fastening opening surprisingly results in that the tightening of the fastening element described at the outset no longer takes place; it can also be easily disassembled after a long run. This circumvents the problem that the starting torque may increase due to the otherwise central arrangement of the fastening bolt. Furthermore, fine threads, for example of size M36 x 1, may be used. In addition, significantly smaller bolts, for example of the size M6, can be used. In addition, the tightening torque thereof is reduced. It has proven to be particularly reliable to apply the necessary clamping force and to remove it after a corresponding operating time.

The clamping section preferably has a sleeve-shaped section. The sleeve-like section extends toward the drive section and is designed to be pushed onto the receiving section toward the drive section and in this case is pushed onto the fastening section. The sleeve-like section has the advantage that the clamping section can be placed in the correct installation position and/or mounted on the receiving section for fastening without play. Furthermore, the segments can be used to compensate for dimensional differences of the individual components of the device.

The fastening section of both devices may have a plurality of fastening openings. This reduces the load on the individual fastening elements during operation, thereby reducing the holding force of each fastening element. Each fastening element can thus be constructed smaller.

Preferably, the fastening openings in all the aforementioned devices have the same distance, viewed in the predetermined direction, with respect to the axis of rotation. As a result, in particular, less imbalance occurs during operation when the roller is rotated. Furthermore, the same holding force for the fastening element is formed. The fastening element can thereby be designed as a universal part, which helps to keep the production costs low.

Alternatively or additionally, the fastening opening is arranged around the rotational axis in such a way that the clamping section is symmetrical in n times position, viewed in the predetermined direction. Where the value n corresponds to the number of fastening openings. The fastening openings and the associated through openings are thus at the same distance from the axis of rotation and from the respective adjacent portions at the same distance from one another. Thus achieving a regular arrangement of the fastening elements. The fastening openings are thus distributed somewhat identically. This is also beneficial to avoid imbalance. The stability to be applied by the fastening section and the clamping section is also evenly distributed.

Preferably, at least one of the fastening openings has an internal thread. The fastening element inserted into the at least one fastening opening is accordingly formed by means of a bolt. Such a screw-connected eccentric device has the advantage that the corresponding fastening element does not rotate along the axis of rotation of the roller during screwing or unscrewing and therefore the roller itself does not rotate either. The rotation shaft can thus serve as a stop for the rotation of the fastening element. Furthermore, this is a rather simple possibility for mounting the clamping section.

Preferably each of the aforementioned means comprises a roller as hereinbefore described. In this case, the individual fastening elements engage in the associated fastening openings in a force-fitting and/or form-fitting manner in such a way that the roller is clamped between the clamping section and the receiving section. Thus forming a modular device, which simplifies assembly.

In this case, the surfaces of the fastening section and the clamping section facing the fastening section, in which the at least one through-opening is formed, are preferably spaced apart from one another in the preassembled state. The preassembled state is the state in which the at least one fastening element is about to be brought out of engagement with the associated fastening opening. This distance makes it possible, for example in the case of bolts as fastening elements, to tension the clamping section with the fastening section, so that the roller is clamped securely.

In the assembled state, i.e. when the fastening element is inserted stably into the associated fastening opening, there is preferably also a (smaller) distance between the fastening section and the surface of the clamping section facing the fastening section. This results in a certain end mobility between the clamping section and the fastening section. This makes it possible, for example, to design the clamping section elastically, so that vibrations during operation can be better compensated.

In the three last-mentioned devices, the receiving section can also be designed to receive a part of the bearing element on the side of the roller facing away from the clamping side in a rotationally fixed manner, said part being arranged freely rotatable relative to another part of the bearing element. A functional unit is thus produced which is freely rotatably accommodated by means of the further part of the bearing element.

Additionally, the device may also have a bearing element. The one part of the bearing element is formed here by means of a bearing inner ring or a bearing outer ring of the bearing element. That is to say that the bearing element can be formed by means of a conventional roller bearing, which has a favorable effect on the production costs.

The clamping section and the bearing element are preferably designed to clamp the roller between them. Therefore, no engagement between elements directly adjacent to one another is necessary. This makes it possible to maintain the structure of the device in a simple and inexpensive manner.

Furthermore, according to the invention, a textile machine is provided with a measuring system having two of the aforementioned devices. The two devices are arranged such that the axes of rotation of their roller sections run parallel to one another and, viewed in a predetermined direction, have a predetermined spacing from one another. The invention can therefore be applied to conventional textile machines.

The textile machine preferably further comprises a drafting mechanism. The rollers of both devices are arranged upstream of the drafting device in the transport direction of the fiber sliver and form a measuring roller pair.

Each textile machine can be configured as a draw frame, a carding machine with a downstream drafting device, a combing machine, a lap winder or a spinning machine with a drafting device.

Drawings

Further features and advantages of the invention result from the following description of a preferred embodiment. In the figure:

FIG. 1 shows an arrangement with a creel and a drawing frame, an

FIG. 2 shows the measuring system of FIG. 1 in two views, an

Fig. 3 shows two devices of the measuring system of fig. 2, each according to an embodiment of the invention and in an exploded view.

Detailed Description

Fig. 1 shows a generic arrangement 1 with a creel 2 and a downstream drawing frame 100.

The creel 2 is constructed in a known manner and will not be described again.

Furthermore, the drawing frame 100 has a winding device 110 on the output end side. The can winding device 110 comprises, in the example shown, a can rail 111 for full cans and a preferably driven can guide rail 112, which moves empty cans onto a can changer of the actual, unmarked can winding device 110. The can changer has, for example, a can mover 113 in a known manner. On the side of the draw frame 100 there is an operating platform 102. There is an operation terminal 101 on one end of an operation platform 102. Furthermore, a drafting system cover 103 can be seen, which covers the drafting section 104 in a known manner. Upstream of the drafting section 104 in the direction of transport of the fiber sliver, there is a measuring system 120 with two unmarked measuring roller devices, each according to one embodiment of the invention.

Fig. 2a shows the measuring system 120 of fig. 1 in greater detail and in the drawing from an angle obliquely downwards and within the scope of the important components. Fig. 2b shows the measuring system of fig. 1 in a view through the measuring system 120 against the transport direction of the fiber strand.

Each measuring roller device comprises an associated measuring roller 125, which is mounted freely rotatably on an associated shaft 127 by means of unmarked bearings.

The left-hand axle 127 is, for example, fastened in a stationary manner to a further part of the drawing frame 100, for example to a frame part. The further shaft 127 is arranged on a further part of the draw frame 100 to be movable horizontally away from and towards the further shaft 127 along a predetermined path in fig. 2 b. The fastening of the left-hand axle 127 and the movable arrangement of the right-hand axle 127 are known and therefore will not be described further.

One associated drive wheel 131 is arranged in a rotationally fixed manner relative to each measuring

roller

125, 125. The

drive wheels

131, 131 are constructed and driven in a known manner such that they rotate in opposite directions to one another at the same speed as one another. The rotation of the

respective drive wheel

131, 131 takes place in the case shown by means of a wound drive belt 130.

A sleeve 124 is arranged on the side of each measuring roller 125 facing away from the respective drive wheel 131. An associated cover 122 is in turn arranged on the side of each sleeve 124 facing away from the respective drive wheel 131. Each top cover 122 bears in a pressing manner against the associated sleeve 124 and presses said sleeve against the associated measuring roller 125. In this case, the cover 122 and the fastening element 123 are preferably spaced apart from one another after the cover 122 has been placed on the fastening element 123 or also after the screw 3 has been tightened. This enables a secure clamping of the measuring roller 125 between the cover 122 and the receiving section 126.

On the side of the left measuring roller 125 facing away from the respective drive wheel 131, the wing element 121 is arranged in a known manner so as to be rotationally fixed relative to the associated left measuring roller 125.

The measuring roller 125 on the left illustratively comprises a circumferential groove 125c extending perpendicularly to the axis of rotation of the measuring roller 125. Correspondingly, the right measuring roller 125 comprises a circumferential projection 125d extending perpendicularly to the axis of rotation of the measuring roller 125. The measuring rollers 125, the recess 125c and the projection 125d are arranged or designed in such a way that the projection 125d can be moved into the recess 125c without friction when the right measuring roller 125 is moved toward the left measuring roller 125. Between the circumferential outer edge of the projection 125d and the groove bottom on the further measuring roller 125c, there is a gap through which the fiber strand to be measured passes in a known manner.

Upstream of the measuring

rollers

125, 125 in the direction of sliver transport, a feed funnel 129 with an internal feed region tapering toward the measuring

rollers

125, 125 is provided in a known manner.

A cover element 128 is arranged between the movably arranged measuring roller 125 on the right in fig. 2b and the associated drive wheel 131. The cover element 128 prevents to some extent contaminants, such as fiber dust, from reaching the interior of the drawing frame 100 in a known manner.

Fig. 3a shows the measuring roller arrangement on the left in fig. 2b in an exploded view from one perspective, insofar as the components essential for the invention are concerned.

The lower section comprises a shaft 127, a drive wheel 131 arranged freely rotatably thereon, and a receiving section 126 arranged non-rotatably relative to the drive wheel 131 thereon. The receiving section 126 has a bearing surface 126b, which is formed circumferentially on the outer circumference and faces away from the drive wheel 131.

The measuring roller 125 is preferably pushed with the cavity 125a against the receiving section 126 and rests on the support surface 126 b. Here, a force and/or form fit can be provided between the receiving section 126 and the measuring roller 125.

On the end facing away from the drive wheel 131 and facing the wing element 121, the receiving section 126 has a cavity 126a which is open towards the wing element 121 and into which the fastening element 123 is preferably inserted or connected non-detachably with the receiving section 126.

The fastening element 123 preferably comprises an external thread on its circumferential outer surface 123b, by means of which the fastening element 123 is screwed into the receiving portion 126 and, if necessary, is connected to the receiving portion 126 in a non-detachable manner, for example by means of an adhesive. Furthermore, the fastening element 123 has two through openings 123a here, which extend along the rotational axis of the measuring roller 125 and thus of the fastening element 123 and are arranged outside said rotational axis.

The sleeve 124 is disposed between the gauge roller 125 and the top cover 122. The cover 122 rests here on a bearing surface 124c of the sleeve 124 facing the cover. The cover 122 has, in correspondence with the through-openings 123a, through-openings 122a provided in the fastening element 123, through which the bolts 3 are screwed into the respective through-openings 123a and thus press the cover 122 against the sleeve 124. Thereby pressing the sleeve 124 against the measuring roller 125. The measuring roller 125 is thereby pressed against the bearing surface 126b of the receiving section 126, so that the measuring roller 125 and the sleeve 124 are clamped between the top cover 122 and the bearing surface 126 b. A measuring roller module is thus produced and the measuring rollers 125 are held securely in place.

The wing element 121 is inserted into the cover 122, preferably fixed in position and non-rotatable, by means of a projection 121a facing the cover 122, i.e. for example by means of a screw connection into a through-opening 122b provided in the cover.

Fig. 3b shows the measuring roller arrangement on the right in fig. 2b in an exploded view from a perspective, likewise within the scope of the components essential for the invention.

The lower section also comprises a shaft 127, a drive wheel 131 arranged thereon in a freely rotatable manner, and a receiving section 126 arranged thereon in a rotationally fixed manner relative to the drive wheel 131, which is preferably of the same design as the receiving section 126 described with reference to fig. 3 a.

The measuring roller 125 concerned here is also pushed with the cavity 125a, preferably in a tight contact manner, onto the receiving section 126 and lies on its support surface 126 b. Here, a force and/or form closure can also be provided between the receiving section 126 and the measuring roller 125.

At the end facing away from the drive wheel 131 and facing the wing element 121 of the further measuring roller device, the receiving section 126 is illustratively constructed in one piece with the fastening element 123.

The fastening element 123 has, at its end facing away from the measuring roller 125, a through-opening 123a which extends along and is arranged outside the rotational axis of the measuring roller 125 and thus of the fastening element 123. Furthermore, an insertion projection 123c, which is preferably likewise arranged eccentrically, is produced, which projects away from the measuring roller 125 by a further fastening element 123.

The sleeve 124 is arranged between the measuring roller 125 and the further top cover 122. The cover 122 rests here on a bearing surface 124c of the sleeve 124 facing the cover. The cover 122 has a through-opening 122a corresponding to the through-opening 123a in the fastening element 123, through which the screw 3 is screwed into the through-opening 123a and thus presses the cover 122 against the sleeve 124. The cover 122 has, in correspondence with the insertion projections 123c on the fastening element 123, insertion recesses 122c on the side facing the fastening element 123, into which the insertion projections 123c engage, preferably in a force-fitting and/or form-fitting manner, when the cover 122 is placed. The cover 122 is thus positioned on the fastening element 123 such that the through

openings

122a, 123a are aligned with one another. The sleeve 124 is pressed against the measuring roller 125 by means of bolts. The same advantages are associated with the measuring roller 125 being pressed against the bearing surface 126b of the receiving section 126, so that the measuring roller 125 and the sleeve 124 are clamped between the cover 122 and the bearing surface 126b, as in the measuring roller arrangement shown in fig. 3 a.

The above-mentioned cover element 128 is arranged between the measuring roller 125 and the drive wheel 131. The cover element can be arranged in a non-rotatable and/or form-fitting manner, for example by means of a screw connection or a locking connection on the circumferential outer surface of the receiving section 126, and is arranged in a rotationally fixed manner relative to the shaft 127. Alternatively, the cover element 128 may be freely rotatably push-fitted onto that receiving section 126.

The present invention is not limited to the above-described embodiments.

The number of through

openings

122a, 123a and/or the number of insertion projections 123c and insertion recesses 122c may vary.

The insertion projection 123c and the insertion recess 122c can each be formed on a further component, i.e. on the cover 122c or on the fastening element 123.

Instead of a threaded connection between the cover 122 and the receiving section 126 or the fastening element 123, any detachable connection can also be provided, for example by means of a snap-fit of an arch.

The sleeve 124 may be omitted. In this case, the receiving section 126 reduces the height of the sleeve 124 in the above-described embodiment.

The embodiments shown can be replaced by one another or combined with one another in terms of components. That is to say, the measuring roller arrangement shown in fig. 3a can have the receiving section 126 and the top cover 122 according to fig. 3b and vice versa.

The insertion projection 123c and the insertion recess 122c can be formed on the

other component

122 or 123, respectively.

Instead of or in addition to the insertion recess 123c, it can also be provided that the cover 122 and the sleeve 124 or the roller 125 engage in a force-fitting and form-fitting manner on the basis of their outer contours in a rotationally fixed manner relative to one another, for example by means of a spring-loaded groove connection.

Preferably, the sleeve 124 or (when the sleeve 124 is absent) the roller 125 projects toward the cover 122 from the side of the fastening element 123 facing the cover 122, so that a spacing remains between the cover 122 and the fastening element 123. The top cover 122 can therefore be tensioned over the sleeve 124 or the roller 125.

The receiving section 126 is disposed via bearings about the shaft 127 so as to be freely rotatable on the shaft 127. The shaft 127 is therefore fixed.

Instead of a fixed shaft 127, said shaft can also be arranged in a rotationally fixed manner relative to the associated drive wheel 131. In this case, the shaft 127 is accommodated in a further part of the drawing frame 100 in a freely rotatable bearing manner. In this case, the cover element is fixed to the receiving section 126 in a freely rotatable manner via bearings. Alternatively, the cover element 128 itself comprises a bearing in its interior, the bearing inner ring of which engages with the receiving section 126 preferably in a force-fitting and/or form-fitting manner.

The measuring

rollers

125, 125 can be designed differently with regard to sensitivity to the thickness of the fiber web. For example, the measuring roller 125 shown in fig. 3a can have a circumferential, angular recess instead of a circumferential groove. The measuring roller 125 shown in fig. 3b can therefore likewise have a circumferential, angular recess, wherein the two recesses face each other.

The drive wheel 131 may be replaced by any further drive element, such as a friction wheel.

The cover 122 and the associated sleeve 124 can be constructed integrally with one another.

The through

openings

122a, 123a do not necessarily have to extend along the axis of rotation of the shaft 127, but may also form an acute angle with said axis of rotation.

In a textile machine, for example in the form of a draw frame as described above, the axes of rotation of the measuring

rollers

125, 125 of the measuring system 120 extend generally parallel to one another and are arranged at a distance from one another.

In the case of drawing frame 100,

rollers

125, 125 are preferably arranged upstream of the drawing frame drafting system in the direction of sliver transport.

The result is that the invention provides a simple and efficient solution, which enables a reliable mounting and also a dismantling of the measuring roller.

List of reference numerals

1 draft arrangement

2 bobbin creel

3 bolt

100 drawing frame

101 operating terminal

102 platform

103 draft section

104 draft mechanism cover

110 can coiling equipment

111 can track

112 can guide rail

113 can mover

120 measurement system

121 wing element

121a projection

122 top cover

122a, 122b through openings

122c concave part

123 fastening element

123a through opening

123b outer surface

123c insert boss

124 sleeve

124a cavity

124b inner surface

124c bearing surface

125 measuring roller

125a cavity

125b bearing surface

125c groove

125d convex part

126 accommodating section

126a cavity

126b bearing surface

126c widening part

127 axle

128 cover element

128a boss

129 feeding hopper

129a funnel region

129b stop surface

130 drive belt

131 drive the wheels.

Claims

1. The device is provided with a plurality of devices,

having a roller section (126, 131, 127) with

A drive section (131) which is designed to be rotationally operatively connected to a drive element,

a receiving section (126) which

Is arranged or configured to be non-rotatable relative to the drive section (131),

is designed to accommodate the roller (125) and

arranged downstream of the drive section (131), viewed in a predetermined direction along the axis of rotation of the roller section (126),

a fastening section (123) that

is configured on the end of the accommodating section (126b) facing away from the driving section (131) and viewed in a predetermined direction

Has at least one fastening opening (123a) which opens out to a clamping side facing away from the drive section (131), said opening being open

Toward the drive section (131) and

arranged outside the axis of rotation at least in the region of the clamping side,

having a clamping section (122, 124) which is provided with a clamping section

Is placed from the clamping side onto the receiving section (126) or the fastening section (123), and

for each fastening opening (123a) there is an associated through-opening (122a) which, viewed in a predetermined direction, is aligned with the associated fastening opening (123a), an

For each fastening opening (123a), an associated fastening element (3) is provided, which engages in the associated fastening opening (123a) in a non-positive and/or positive manner from the mounting side facing away from the clamping side through the associated through-opening (122a) in such a way that the clamping section (124) is held on the roller (125).

2. The device according to claim 1, wherein the clamping section (122, 124) has a sleeve-shaped section (124), which sleeve-shaped section is formed by a sleeve-shaped section (124)

Extends towards the drive section (131) and

is designed to be pushed onto the receiving section (126) toward the drive section (131) and to be pushed onto the fastening section (123).

3. The device according to one of the preceding claims, wherein the fastening section (123) has a plurality of fastening openings (123 a).

4. Device (120) according to claim 3, wherein the fastening openings (123a) have the same distance, viewed in a predetermined direction, with respect to the axis of rotation.

5. The apparatus of claim 3 or 4,

the fastening opening (123a) is arranged around the rotation axis such that the clamping section (124) is symmetrical in n times position when viewed in a predetermined direction, and

n corresponds to the number of fastening openings (123 a).

6. The device according to one of the preceding claims,

the fastening opening (123a) has an internal thread and

the fastening element (3) inserted into one of the fastening openings is formed by means of a bolt (3).

7. The device according to one of the preceding claims,

also comprises a roller (125),

wherein the respective fastening element (3) engages in the associated fastening opening (123a) in a non-positive and/or positive manner such that the roller (125) is clamped between the clamping section (122, 124) and the receiving section (126 a).

8. The device according to claim 7, wherein faces of the fastening section (123) and the clamping section (122, 124) facing the fastening section (123), in which the at least one through-opening (122a) is configured, are spaced apart from one another in the preassembled state.

9. The device according to claim 8, wherein the faces of the fastening section (123) and the clamping section (122, 124) facing the fastening section (123) are spaced apart from one another in the fitted state.

10. Device according to one of claims 7 to 9, wherein the receiving section (126a) is further designed to receive a part of the bearing element on the side of the roller (125) facing away from the clamping side in a rotationally fixed manner, said part being arranged freely rotatable relative to another part of the bearing element.

11. The device of claim 10, further having a bearing element, wherein the portion of the bearing element is formed by means of a bearing inner ring or a bearing outer ring of the bearing element.

12. Device according to claim 10 or 11, wherein the clamping section (124) and the bearing element are designed to clamp a roller (125) between them.

13. Textile machine (100) having a measuring system (120) with two devices

Constructed in accordance with one of claims 7 to 12 and

are arranged in such a way that the rotational axes of the roller sections (126, 131, 127) of the device run parallel to one another and

at a predetermined distance from each other, viewed in a predetermined direction.

14. Textile machine (100) according to claim 13,

also comprises a drafting mechanism (103),

wherein the rollers of the two devices

Is arranged upstream of the drafting mechanism (103) along the fiber strip conveying direction and

forming a measuring roller pair.

15. Textile machine (100) according to claim 13 or 14, configured as

A drawing frame (100),

a carding machine with a downstream drafting unit,

a combing machine is provided with a plurality of combing machines,

sliver lap machine or

A spinning machine having a drafting mechanism.