CN112176470A - Spinning rotor assembly for rotor spinning machine - Google Patents
Spinning rotor assembly for rotor spinning machine Download PDFInfo
- Publication number
- CN112176470A CN112176470A CN202010541338.3A CN202010541338A CN112176470A CN 112176470 A CN112176470 A CN 112176470A CN 202010541338 A CN202010541338 A CN 202010541338A CN 112176470 A CN112176470 A CN 112176470A
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- spinning
- rotor
- spinning rotor
- brake
- rotor assembly
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01H—SPINNING OR TWISTING
- D01H4/00—Open-end spinning machines or arrangements for imparting twist to independently moving fibres separated from slivers; Piecing arrangements therefor; Covering endless core threads with fibres by open-end spinning techniques
- D01H4/04—Open-end spinning machines or arrangements for imparting twist to independently moving fibres separated from slivers; Piecing arrangements therefor; Covering endless core threads with fibres by open-end spinning techniques imparting twist by contact of fibres with a running surface
- D01H4/08—Rotor spinning, i.e. the running surface being provided by a rotor
- D01H4/10—Rotors
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01H—SPINNING OR TWISTING
- D01H4/00—Open-end spinning machines or arrangements for imparting twist to independently moving fibres separated from slivers; Piecing arrangements therefor; Covering endless core threads with fibres by open-end spinning techniques
- D01H4/04—Open-end spinning machines or arrangements for imparting twist to independently moving fibres separated from slivers; Piecing arrangements therefor; Covering endless core threads with fibres by open-end spinning techniques imparting twist by contact of fibres with a running surface
- D01H4/08—Rotor spinning, i.e. the running surface being provided by a rotor
- D01H4/12—Rotor bearings; Arrangements for driving or stopping
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01H—SPINNING OR TWISTING
- D01H4/00—Open-end spinning machines or arrangements for imparting twist to independently moving fibres separated from slivers; Piecing arrangements therefor; Covering endless core threads with fibres by open-end spinning techniques
- D01H4/42—Control of driving or stopping
- D01H4/44—Control of driving or stopping in rotor spinning
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Textile Engineering (AREA)
- Spinning Or Twisting Of Yarns (AREA)
Abstract
The invention relates to a spinning rotor assembly for a rotor spinning machine. It also relates to a rotor spinning machine. In order to propose a safely operable rotor assembly of a rotor spinning machine, in particular to avoid injuries to a user operating the rotor spinning machine and to prevent material in the environment of the rotor spinning machine from winding up in a rapidly rotating spinning rotor, the spinning rotor assembly comprises a spinning rotor secured to a spinning rotor shaft which is rotatably mounted to a housing of the spinning rotor assembly by means of at least one bearing unit, wherein the spinning rotor assembly is movable, in particular pivotable, between a first position and a second position, and a rotor brake for braking the spinning rotor is pivotally mounted to the housing, such that the rotor brake is automatically switched on when the spinning rotor assembly is moved, in particular pivoted, from the first position to the second position.
Description
Technical Field
The invention relates to a spinning rotor assembly for a rotor spinning machine and a rotor spinning machine.
Background
Rotor spinning machines are widely used for processing fiber materials or rovings into processable yarns or threads by means of spinning rotors of a spinning rotor assembly. Such a spinning rotor assembly comprising a spinning rotor connected to a rotor shaft and at least one bearing unit is generally used in spinning machines, in particular in open-end rotor spinning machines. Such an open-end rotor spinning machine operates at a speed of 100000rpm or more. In the operation of a rotor spinning machine, the spinning rotor is generally arranged in a housing to protect the operator from injury and to avoid any contact of the rotating spinning rotor with other components of the rotor spinning machine or with the material in the surrounding environment. It is therefore particularly important to stop the rotation of the spinning rotor quickly when the housing is opened. In addition, opening the housing containing the movement of the spinning rotor rotating at a high speed causes a great force to act on the spinning rotor assembly and in particular at least one bearing unit rotatably mounting the spinning rotor shaft to the housing, which may cause wear or even damage to the spinning rotor assembly.
Disclosure of Invention
It can be seen as a first object of the present invention to propose a spinning rotor assembly of a rotor spinning machine which can be stopped quickly when a casing provided for protecting the spinning rotor is opened.
It may be seen as a further object of the present invention to propose a spinning rotor assembly of a rotor spinning machine which can be safely handled, in particular to avoid injuries to the operator operating the rotor spinning machine and/or to prevent material in the rotor spinning machine environment from being caught by or entangled in the rapidly rotating spinning rotor.
Another object of the invention may also be to propose a rotor spinning machine which automatically stops spinning rotors rotating quickly when the spinning rotor in operation becomes accessible and in particular when the housing is opened or pivoted.
Finally, it can be seen as an object of the present invention to provide a spinning rotor assembly of a rotor spinning machine, which automatically prevents the bearing unit of the spinning rotor assembly from being damaged by the movements, in particular tilting, of the spinning rotor rotating at high speed.
These and other objects are achieved by a spinning rotor assembly or a rotor spinning machine.
A spinning rotor assembly for a rotor spinning machine according to the invention comprises a spinning rotor secured to a spinning rotor shaft which is rotatably mounted to a housing of the spinning rotor assembly by means of at least one bearing unit, wherein the spinning rotor assembly is movable, in particular pivotable, between a first position and a second position. The spinning rotor assembly further comprises a rotor brake for braking the spinning rotor, which is pivotably mounted to the housing such that the rotor brake is automatically switched on (engaged) when the spinning rotor assembly is moved, in particular pivoted, from the first position to the second position.
The invention also relates to a rotor spinning machine with a spinning rotor assembly according to the invention, wherein the spinning rotor assembly is preferably part of a spinning box of the rotor spinning machine, and most preferably the rotor spinning machine comprises several, in particular identical, spinning boxes.
The at least automatically switched-on rotor brake when the rotor assembly comprising the spinning rotor is moved from the first position to the second position advantageously allows a safe operation of the rotor spinning machine. In addition, a rotor brake can be used to stop the spinning rotor at a defined time and/or at a defined position, in particular at a defined rotational position of the rotor assembly. In addition, the rotor brake advantageously protects the bearing unit against damage due to the large forces caused by the movements of the operator, in particular tilting or pivoting of a rapidly rotating spinning rotor. The rotor brake can also be used to adjust the forces acting on the bearing unit according to the bearing specifications. Finally, a rotor brake may advantageously be used to abruptly stop the spinning rotor to clean fiber material dust or rovings fed to the spinning rotor and/or yarns or threads produced in the spinning rotor from the spinning rotor.
The rotor spinning machine may be any machine for processing a fiber material or roving into a processable yarn or yarn with a spinning rotor. A rotor spinning machine may comprise only a single rotor, in particular arranged within a spinning box. Preferably, the spinning machine comprises several spinning rotors and in particular several identical spinning boxes each containing one spinning rotor. The rotor spinning machine may comprise further optional components, in particular for processing the fibrous material or the roving before spinning and/or the yarn or yarn after spinning.
In order to be able to process fibre material or rovings, a spinning rotor assembly is provided, in particular to allow a high rotational speed of the spinning rotor. The spinning rotor assembly is preferably part of a spinning box of a rotor spinning machine. The spinning rotor assembly advantageously comprises at least a spinning rotor, a spinning rotor shaft and at least one bearing unit and a housing at least for protecting the spinning rotor. The rotor assembly may also comprise other components such as pulleys for the transmission of the spinning rotor shaft by means of a transmission belt or at least one resilient element for damping vibrations between the bearing unit and the housing.
The spinning rotor of the rotor spinning machine is a component or assembly for processing fiber material or roving into a processable yarn or thread, and in particular a spinning rotor of a rotor spinning machine. Preferably, the spinning rotor is a rotor cup (rotor cup), which is more preferably formed in one piece and/or from metal. Advantageously, the spinning rotor is a rotationally symmetrical piece to avoid unbalance in rotation. Such spinning rotors can spin during normal operation at rotational speeds of more than 100000 revolutions per minute or even up to 200000 revolutions per minute. Thus, even a slight imbalance results in a large force being applied to the rotating member which must be designed and/or configured to withstand the forces of normal operation.
The spinning rotor shaft can be constructed as one component or as an assembly of several separate components. Preferably, the spinning rotor shaft is constructed as a single piece extending from one end of the rotor assembly to the other. In particular, the spinning rotor shaft is provided for rotatably mounting the spinning rotor to the housing via at least one bearing unit. Advantageously, the spinning rotor shaft is a rotationally symmetrical part to avoid unbalance in rotation. The spinning rotor shaft may have a constant diameter along its entire length. Preferably, the diameter in the middle of the spinning rotor shaft and/or at the section between at least two, preferably all bearing units is larger than the diameter at the end of the spinning rotor shaft, in particular at the end for mounting the spinning rotor.
At least one bearing unit is provided for rotatably mounting the spinning rotor shaft to a housing of the spinning rotor assembly and/or of the spinning box and/or of the rotor spinning machine. Preferably, at least two bearing units are arranged on the spinning rotor shaft. More preferably, all bearing units are identical to each other and/or spaced apart from each other along the spinning rotor shaft. The bearing unit may comprise, and in particular may be, any type of bearing, but preferably the bearing units are all rolling bearings.
According to the invention, the spinning rotor assembly is movable between a first position and a second position. Although this movement may also be a linear movement or comprise a lateral component, the movement preferably also comprises a swivel component and more preferably the movement is only a pivoting movement, most preferably in a single pivot axis. Preferably, the axis of pivotal movement of the spinning rotor assembly is arranged perpendicular to the axis of rotation of the spinning rotor and/or the spinning rotor shaft. Typically, the spinning rotor assembly may be movably mounted within the spinning box and/or with respect to another part, unit or assembly of the spinning box or rotor spinning machine. Advantageously, the rotor assembly is movable, in particular pivotable, relative to a truss (girder), a part of the housing and/or a mounting frame for setting up and/or positioning a rotor spinning machine including the spinning rotor assembly to the ground.
It is therefore preferred that the housing of the spinning rotor assembly comprises two parts movably, in particular pivotably, mounted to each other. Preferably, the first part of the housing is fixed to said at least one bearing unit, preferably all bearing units of the rotor assembly, and/or is arranged to be pivotally mounted relative to the remainder of the rotor spinning machine or the ground in which the rotor spinning machine is mounted in place. The second part of the housing is preferably pivotably arranged relative to the spinning rotor.
According to the invention, the rotor brake is pivotably mounted to the housing, in particular to the first part of the housing. A rotor brake is provided for braking the spinning rotor with high efficiency. Preferably, the rotor brake interacts mechanically with a part of the spinning rotor shaft to brake the spinning rotor. More preferably, the rotor brake interacts with one end of the spinning rotor shaft, most preferably with a part of the spinning rotor shaft arranged to be driven by a drive belt and/or a belt driven roller arranged at one end of the spinning rotor shaft.
Also according to the invention, a rotor brake is mounted to the housing such that the rotor brake is automatically switched on when the spinning rotor assembly and/or further the spinning rotor assembly housing is moved from the first position to the second position. Preferably, the switching on of the rotor brake is driven solely by the mechanical interaction of the rotor brake with other components of the rotor spinning machine, in particular the spinning rotor assembly, the spinning rotor assembly housing and/or the rotor spinning machine components for firmly fixing the rotor spinning machine to the ground.
The first position is preferably the working position of the spinning rotor and/or the position in which the spinning rotor assembly including the spinning rotor is driven to produce a yarn or a thread. Preferably, in the first position, the housing of the spinning rotor assembly is closed and/or the first and second parts of the housing are in contact, in particular so as to form a closed housing. Thus, the second position is preferably a position where the spinning rotor is accessible at this time and/or a position where the spinning rotor is not in operation at this time. Preferably, in the second position, the housing of the spinning rotor assembly is open and/or the first and second parts of the housing are not in contact, in particular to provide an opening for accessing the spinning rotor.
Thus, in a preferred embodiment of the invention, the spinning rotor assembly is movable, in particular pivotable about a pivot joint, between a first closed position for the working of the spinning rotor and a second open position (in which the spinning rotor is accessible). Furthermore, the rotor brake is configured to be automatically switched on when the spinning rotor assembly is moved to the open position and/or automatically switched off when the spinning rotor assembly is moved or reaches the closed position. It is also preferred that the spinning rotor assembly is movably mounted, in particular pivotally mounted, so that when moved to the second open position the end of the spinning rotor shaft or a pulley, in particular arranged at one end of the spinning rotor shaft, is moved away from the drive belt, whereby the drive means is disengaged and/or the connection to the actuator is interrupted. Most preferably, the disengagement of the drive belt and the engagement of the rotor brake, in particular the mechanical engagement of the rotor brake to the spinning rotor shaft, take place simultaneously or at least immediately after each other.
It is also preferred that the rotor brake is configured to be permanently switched on in the second open position of the spinning rotor assembly and/or as long as the spinning rotor assembly is not in the closed position to ensure the safety of the rotor spinning machine operator. Such a rotor brake embodiment preferably cannot be disengaged as long as the spinning rotor is accessible. Preferably, the rotor brake is mechanically configured to be switched on in an open position of the spinning rotor assembly. Even more preferably, the rotor brake cannot be mechanically disengaged as long as the spinning rotor assembly is not in the closed position. Thus, in such an embodiment, a malfunction by the operator is impossible.
In a further development of the inventive spinning rotor assembly, the rotor brake is completely formed by mechanical parts and/or is free of electrical control means and/or is free of an electrical actuator such as an electric motor or the like. Thus, the cup brake is always running and is in particular independent of the power supply. More preferably, the rotor brake does not comprise any hydraulic or pneumatic components at least for switching on the motor brake. Thus, the rotor brake is preferably always in operation. It is particularly preferred that the cup brake is driven at least only by spring force into the switched-on position.
In general, any surface or part of the rotor brake can interact mechanically with the spinning rotor shaft during the switching-on of the rotor brake. It is preferred that the rotor brake comprises a braking surface which is brought into contact by spring force and in particular pressed by spring force against the spinning rotor shaft or a pulley preferably fixed to one end of the spinning rotor shaft when the rotor brake is switched on and/or when the spinning rotor assembly is moved out of the first closed position. Preferably, the braking surface is arranged for direct and/or mechanical interaction with a surface of the spinning rotor shaft or of the pulley. More preferably, the shape of the braking surface is adapted to the shape of the spinning rotor shaft section interacting with the braking surface. Most preferably, the braking surface has the same curvature or radius as the spinning rotor shaft or the pulley. Advantageously, the braking surface is shaped to provide a large contact area with the spinning rotor shaft.
The rotor brake and in particular the braking surface of the rotor brake can contact the surface of the spinning rotor shaft or the pulley at any position. It is preferred that the rotor brake is pressed against the surface of the spinning rotor shaft or pulley opposite to the side of the spinning rotor shaft or pulley that is arranged to contact the drive belt, so that the drive belt does not contact the rotor brake, which would hamper the braking effect. Furthermore, by arranging the drive belt and the rotor brake on opposite sides of the spinning rotor shaft, it is easily possible to pivot the spinning rotor shaft away from the drive belt and simultaneously to the rotor brake, or vice versa. Thus, an even faster switching on and off of the rotor brake from the drive belt and/or an easy avoidance of the spinning rotor shaft contacting both the drive belt and the rotor brake can be achieved.
According to a preferred embodiment of the invention, the rotor brake comprises a brake lever which is pivotably mounted to the housing via a pivot, wherein the braking surface is located on one side of the brake lever, in particular one end of the brake lever, and a spring element is provided on the other side, in particular the other end, of the brake lever. Preferably, a spring element is arranged between the brake lever and the housing to force the brake lever towards an on position, in which the rotor brake is switched on and/or the braking surface is brought into contact with the spinning rotor shaft or the pulley. The spring element preferably biases the brake lever into the brake-on position. The spring member may be attached to the brake lever in any feasible manner. The spring element is preferably supported, in particular, at one end on the brake lever and/or at the other end on the housing, in particular the first part of the housing.
The brake lever may have any shape and size. Preferably, the brake lever is divided by the pivot into two sides, the first side being the operating side and the second side being the braking side. Preferably, the braking surface is provided on the braking side and/or at least the spring element is provided on the actuating side. It is also preferred that the rod has an L-shape and/or two sections arranged substantially perpendicular to each other. More preferably, the pivot is arranged at the long side of the L-shaped bar, in particular approximately in the centre of the long side. It is also preferred that when the spinning rotor assembly is moved from the first position to the second position, the short side of the L-shaped lever is pushed by the housing, resulting in the switching on of the rotor brake. Advantageously, at least in the switched-on position of the rotor brake, the longer side of the L-shaped lever and/or the lever side comprising the braking surface is arranged parallel to the spinning rotor shaft. It is also preferred that the pivot axis of the brake lever and the pivot axis of the two parts of the spinning box or housing are arranged parallel and/or spaced to each other.
To extend the life of the spinning rotor assembly and facilitate maintenance of the spinning rotor assembly, a brake pad is preferably removably and/or replaceably mounted at one end of the brake lever to provide a braking surface. Such an embodiment advantageously allows for simple replacement of the rotor brake component with the braking surface. The brake lining can be made of any material and can have any shape. Preferably, the brake lining provides the entire braking surface. It is also preferred that the brake lining is made of a material which is softer than the surface of the spinning rotor shaft or of the drive roller which interacts with the brake lining when the rotor brake is switched on. Most preferably, the brake lining is made of a polymer. Although the brake lining can also be an integral part of the brake lever, it is preferred that the brake lining is a separate piece and can be fixed to the brake lever. Most preferably, a brake pad receptacle is provided on the braking side of the lever to receive and hold firmly in place a brake pad.
According to a preferred embodiment of the spinning rotor assembly, a contact piece is arranged on the brake lever to be pressed against a surface of a non-pivotable truss of the rotor spinning machine in the closed position of the spinning rotor assembly to hold the rotor brake in the unengaged position, wherein the contact piece and the truss surface are released from contact when the brake lever together with the spinning rotor assembly is pivoted from the first closed position to the second open position so that the rotor brake is automatically engaged. It is also preferred that the brake lever and especially the contact member releases the contact with the truss when the spinning rotor assembly is moved to the second open position and thus the rotor brake is switched on. Preferably, the contact member pressed against the truss surface at the contact point prevents the rotor brake and in particular the braking surface from contacting the spinning rotor shaft or the pulley in the closed position of the spinning rotor assembly. It is also preferred that the contact piece is arranged on the opposite side of the brake lever to the braking surface and/or on the same side as the spring element. Advantageously, the contact element is oriented perpendicularly to the braking surface. The truss may be any part of the frame or housing of the spinning box or rotor spinning machine which is not pivotally arranged relative to the floor on which the rotor spinning machine is mounted in place.
In order to be able to adjust the position and/or the moment of switch-on of the brake when moving the spinning rotor assembly from the first position to the second position, according to a preferred embodiment of the spinning rotor assembly, the contact element is adjustably arranged longitudinally, in particular by a threaded connection with a brake lever. Such an arrangement allows adjusting the distance of the switched-on and/or switched-off braking surface of the rotor brake from the spinning rotor shaft or pulley in the closed position, depending on the pivoting angle of the spinning rotor assembly.
It is also preferred that the stop is placed on the housing of the spinning rotor assembly or on the truss to provide a stop point for the housing being tilted into the open position. Preferably, the stop points are located on the part of the truss opposite the contact points on the truss. Therefore, the housing of the spinning rotor assembly is preferably arranged in the area between said stop point and the contact point. Most preferably, the stop points and the contact points are arranged on a single truss and/or the two points are arranged in one plane.
In an advantageous embodiment of the spinning rotor assembly, the spring element is adjustably mounted to the brake lever for adjusting said force, the braking surface of the brake lever of the brake lining being applying said force to the surface of the spinning rotor shaft or of the pulley. More preferably, the spring member is longitudinally adjustable by a threaded connection allowing continuous adjustment.
Finally, it is also preferred that a control is provided for allowing the switching on of the rotor brake in the closed position of the spinning rotor assembly and also the automatic switching on of the rotor brake when moving the spinning rotor assembly out of the closed position and/or into the open position, which also allows the braking of the spinning rotor in the first position of the spinning rotor assembly, for example to avoid strong forces acting on the at least one bearing unit, to clean the spinning rotor by strong braking or to shut down the spinning machine as quickly as possible. It is particularly preferred that in addition to the automatic rotor brake-on mode, a manual mode is provided which allows an operator or a control unit of the rotor spinning machine to brake the spinning rotor, in particular also in the first position of the spinning rotor assembly.
Drawings
These and other aspects of the invention will be apparent from and elucidated with reference to the embodiment(s) described hereinafter;
figure 1 shows a perspective view of a rotor assembly comprising a spinning rotor, a housing and a rotor brake;
FIG. 2 illustrates a partially transparent perspective view of the rotor assembly shown in FIG. 1; and
fig. 3 illustrates a cross-sectional view of a cup brake of the cup assembly shown in fig. 1.
List of reference numerals
1 spinning rotor assembly
2 spinning rotor
3 spinning rotor shaft
4 casing
5 bearing unit
6 revolving cup brake
7 pivoting joint
8 braking surface
9 surface of spinning rotor shaft
10 drive belt
11 brake lever
12 pivot
13 spring element
14 brake lining
15 contact element
16 truss
Detailed Description
The spinning rotor assembly 1 as shown in fig. 1 comprises a spinning rotor 2 mounted to a spinning rotor shaft 3. The spinning rotor 2 is arranged in a housing 4 to protect an operator of an open-end rotor spinning machine comprising several spinning boxes each having a spinning rotor assembly 1. For rotatably mounting the spinning rotor 2 to the housing 4, the spinning rotor shaft 3 is mounted to the housing by means of two bearing units 5 (see fig. 2).
To access the spinning rotor 2, the spinning rotor assembly 1 can be pivoted from a first closed position for spinning to a second open position. Thus, the housing 4 comprises a pivot joint 7 for providing a mechanism for pivotally mounting the spinning rotor assembly 1 about a pivot axis.
However, before the operator can access the spinning rotor 2 after the spinning rotor assembly 1 has been pivoted into the open position, the spinning rotor 2 must be braked from a rotational speed of more than 100000rpm in operation to a complete stop. Thus, a rotor brake 6 is provided. The rotor brake 6 comprises a brake lever 11 pivotally mounted to the housing 4 of the spinning rotor assembly 1 at a pivot 12.
The pivot axis 12 of the brake lever 11 is arranged parallel to the pivot joint 7 on the housing 4 of the spinning rotor assembly 1 and perpendicular to the rotational axis of the spinning rotor shaft 3. The spring member 13 is arranged between the brake lever 11 and the housing 4 on one side of the pivot 12. The spring element 13 is biasing the brake lever 11 into the engaged position of the cup brake 6. On the opposite side of the pivot axis 12 of the brake lever 11, a brake lining 14 is arranged on one end of the brake lever 11, wherein the brake lining 14 comprises a brake surface 8 (see fig. 3) to be in direct contact with the surface 9 of the spinning rotor shaft 3. Thus, the rotor brake 6 is operated by mechanical contact and in particular friction between the surface of the brake lining 14 and the surface 9 of the spinning rotor shaft 3.
In a position directly opposite to the position where the surface 9 of the spinning rotor shaft 3 is now driven by the drive belt 10 to accelerate and drive the spinning rotor 2 through the spinning rotor shaft 3, the brake lining 14 contacts the surface 9 of the spinning rotor shaft 3.
In order to automatically switch on the rotor brake 6 when the spinning rotor assembly 1 is pivoted into the second open position and to hold the rotor brake 6 in the disengaged switched-on position when the spinning rotor assembly 1 is in the first closed position, the end of the brake lever 11 is inclined by 90 ° on the side of the brake lever 11 which also contains the spring element 13, wherein this inclined section comprises the contact element 15. In the first closed position of the spinning rotor assembly 1, the contact element 15 contacts the surface of the truss 16 of the rotor spinning machine, holding the rotor brake 6 in the disengaged position against the force of the spring element 13. Once the spinning rotor assembly 1 is pivoted to the second open position, the contact member 15 is released from the contact with the surface of the truss 16 and the spring member 13 forces the rotor brake 6 to the on position. At the same time, the spinning rotor shaft 3 is released from contact with the belt 10.
As long as the spinning rotor assembly 1 remains in the second open position, the rotor brake 6 remains switched on, while the drive belt 10 remains free from the surface 9 of the spinning rotor shaft 3. Only when the spinning rotor assembly 1 is pivoted again to the first closed position, the contact piece 15 on the brake lever 11 again contacts the truss 16 and the brake is released. At the same time, the surface 9 of the spinning rotor shaft 3 comes into contact with the belt 10, which again accelerates the spinning rotor 2 to operating speed.
Claims (14)
1. A spinning rotor assembly (1) for a rotor spinning machine, comprising:
-a spinning rotor (2) fixed to a spinning rotor shaft (3), said spinning rotor shaft (3) being rotatably mounted to a housing (4) of said spinning rotor assembly (1) by at least one bearing unit (5), wherein
-the spinning rotor assembly (1) is movable between a first position and a second position, and wherein
-a rotor brake (6) for braking the spinning rotor (2) is pivotally mounted to the housing (4) such that the rotor brake (6) is automatically switched on when the spinning rotor assembly (1) is moved from the first position to the second position.
2. A spinning rotor assembly according to claim 1, characterised in that the spinning rotor assembly (1) is pivotally mounted about a pivot joint (7) between a first closed position for operating the spinning rotor and a second open position in which the spinning rotor (2) is accessible, wherein the rotor brake (6) is configured to be automatically switched on when the spinning rotor assembly (1) is moved to the second open position and to be automatically released when the spinning rotor assembly (1) reaches the first closed position.
3. A spinning rotor assembly according to claim 1 or 2, characterised in that the rotor brake (6) is configured to be permanently switched on in the second open position of the spinning rotor assembly (1).
4. A spinning rotor assembly according to at least one of the preceding claims, characterized in that the rotor brake (6) is entirely constituted by mechanical parts without electrical control means and electrical actuators.
5. A spinning rotor assembly according to at least one of the preceding claims, characterised in that the rotor brake (6) is driven to the on position only by spring force.
6. A spinning rotor assembly according to at least one of the preceding claims, characterized in that the rotor brake (6) comprises a braking surface (8), which braking surface (8) is pressed against the spinning rotor shaft (3) by spring force when the rotor brake (6) is switched on.
7. Spinning rotor assembly according to at least one of the preceding claims, characterised in that the rotor brake (6) is pressed against the surface (9) of the spinning rotor shaft (3) on the side opposite to the side of the spinning rotor shaft (3) or pulley intended to contact the drive belt (10).
8. A spinning rotor assembly according to at least one of the preceding claims, characterized in that the rotor brake (6) comprises a brake lever (11), which brake lever (11) is pivotally mounted to the housing (4) via a pivot (12), wherein the brake surface (8) is located on one side of the brake lever (11), and a spring element (13) is provided on the other side of the brake lever (11) to force the brake lever (11) towards the on position of the rotor brake (6).
9. A spinning rotor assembly according to at least one of the preceding claims, characterized in that a brake lining (14) is mounted on one end of the brake lever (11) to provide the braking surface (8).
10. A spinning rotor assembly according to at least one of the preceding claims, characterized in that a contact piece (15) is arranged on the brake lever (11) to press against the surface of a non-pivotable truss (16) in the first closed position of the spinning rotor assembly (1) to keep the rotor brake (6) in an unengaged position, wherein the contact piece (15) and the surface of the truss (16) are released from contact when the brake lever (11) together with the spinning rotor assembly (1) is pivoted from the first closed position to the second open position so that the rotor brake (6) is automatically engaged.
11. A spinning rotor assembly according to at least one of the preceding claims, characterized in that the contact piece (15) is arranged longitudinally adjustable by means of a threaded connection with the brake lever (11) to adjust the switching-on of the rotor brake (6) according to the pivoting angle of the spinning rotor assembly (1) and/or according to the distance of the disengaged brake surface (8) from the spinning rotor shaft (3) in the closed position.
12. A spinning rotor assembly according to at least one of the preceding claims, characterized in that the spring element (13) is adjustably mounted to the brake lever (11) to adjust the length of the spring element (13) and/or the force that the braking surface (8) is applying to the surface (9) of the spinning rotor shaft (3).
13. A spinning rotor assembly according to at least one of the preceding claims, characterized in that a control is provided to allow the rotor brake (6) to be switched on in the closed position of the spinning rotor assembly (1) in addition to the automatic switching on of the rotor brake when the spinning rotor assembly (1) is moved out of the closed position and/or into the open position.
14. Rotor spinning machine with a spinning rotor assembly (1) according to at least one of claims 1 to 13.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP19180490.5A EP3754061A1 (en) | 2019-06-17 | 2019-06-17 | Spinning rotor assembly for a rotor spinning machine |
| EP19180490.5 | 2019-06-17 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112176470A true CN112176470A (en) | 2021-01-05 |
| CN112176470B CN112176470B (en) | 2021-11-05 |
Family
ID=66912662
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010541338.3A Active CN112176470B (en) | 2019-06-17 | 2020-06-15 | Spinning rotor assembly for rotor spinning machine |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP3754061A1 (en) |
| CN (1) | CN112176470B (en) |
| BR (1) | BR102020012006A2 (en) |
| MX (1) | MX2020006281A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115434049A (en) * | 2021-06-02 | 2022-12-06 | 卓郎纺织解决方案两合股份有限公司 | Spinning device |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1370838A (en) * | 1971-06-16 | 1974-10-16 | Elitex Zavody Textilniho | Open spinning unit having a braking device |
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| CN103437005A (en) * | 2013-08-07 | 2013-12-11 | 经纬纺织机械股份有限公司 | Slow-down piecing control device of rotor spinning machine |
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| CN104562316B (en) * | 2013-10-25 | 2017-05-17 | 索若德国两合股份有限公司 | Open-end spinning device |
| CN208167196U (en) * | 2018-05-17 | 2018-11-30 | 嵊州市新科扬机械有限公司 | Rotor spinning power traction yarn roller lifting apparatus |
| EP3489397A1 (en) * | 2017-11-27 | 2019-05-29 | Savio Macchine Tessili S.p.A. | Open end spinning machine with improved braking system of the rotor shaft |
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| DE8808476U1 (en) * | 1987-07-01 | 1988-09-29 | Maschinenfabrik Rieter Ag, Winterthur, Ch | |
| DE102004035271A1 (en) * | 2004-07-21 | 2006-02-16 | Texparts Gmbh | Rotor brake for a spinning rotor |
| CN101363151B (en) * | 2007-08-06 | 2011-06-15 | 浙江日发纺织机械有限公司 | Brake device of rotor for spinning device |
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2019
- 2019-06-17 EP EP19180490.5A patent/EP3754061A1/en active Pending
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2020
- 2020-06-15 CN CN202010541338.3A patent/CN112176470B/en active Active
- 2020-06-15 BR BR102020012006-9A patent/BR102020012006A2/en unknown
- 2020-07-13 MX MX2020006281A patent/MX2020006281A/en unknown
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| GB1370838A (en) * | 1971-06-16 | 1974-10-16 | Elitex Zavody Textilniho | Open spinning unit having a braking device |
| DE2535254A1 (en) * | 1975-08-07 | 1977-02-17 | Schlafhorst & Co W | METHOD AND DEVICE FOR PROTECTING TANGENTIAL DRIVES OF A TEXTILE MACHINE |
| DE2622628A1 (en) * | 1976-05-20 | 1977-12-01 | Fritz Stahlecker | Open-end spinning rotor brake - has a spring to exert the braking pressure on opening the rotor housing |
| US5463860A (en) * | 1992-12-24 | 1995-11-07 | Rieter Ingolstadt Spinnereimaschinenbau Ag | Process and device for piecing an open-end spinning device |
| CN101294320A (en) * | 2007-04-26 | 2008-10-29 | 立达英格尔施塔特有限公司 | Air flow spinning appartus with cotton opening roller brake apparatus |
| CN203487297U (en) * | 2013-07-31 | 2014-03-19 | 上海淳瑞机械科技有限公司 | Draw hook connector for spinning device of rotor spinning machine |
| CN103437005A (en) * | 2013-08-07 | 2013-12-11 | 经纬纺织机械股份有限公司 | Slow-down piecing control device of rotor spinning machine |
| CN104562316B (en) * | 2013-10-25 | 2017-05-17 | 索若德国两合股份有限公司 | Open-end spinning device |
| CN103789880A (en) * | 2014-01-24 | 2014-05-14 | 浙江日发纺织机械股份有限公司 | Winding and lifting device of full-automatic rotor spinning machine |
| EP3489397A1 (en) * | 2017-11-27 | 2019-05-29 | Savio Macchine Tessili S.p.A. | Open end spinning machine with improved braking system of the rotor shaft |
| CN208167196U (en) * | 2018-05-17 | 2018-11-30 | 嵊州市新科扬机械有限公司 | Rotor spinning power traction yarn roller lifting apparatus |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115434049A (en) * | 2021-06-02 | 2022-12-06 | 卓郎纺织解决方案两合股份有限公司 | Spinning device |
| CN115434049B (en) * | 2021-06-02 | 2024-05-14 | 卓郎纺织解决方案两合股份有限公司 | Spinning device |
Also Published As
| Publication number | Publication date |
|---|---|
| EP3754061A1 (en) | 2020-12-23 |
| MX2020006281A (en) | 2020-12-18 |
| CN112176470B (en) | 2021-11-05 |
| BR102020012006A2 (en) | 2021-08-17 |
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