JPH04263626A - Device for driving spindle of ring fine spinning machine - Google Patents

Abstract

PURPOSE: To provide a device for driving spindles in a ring spinning machine, having a simple structure and improving conditions for driving the spindles so as to prevent the slippage of the spindles as much as possible at a low cost. CONSTITUTION: In the ring spinning machine, the spindles are rotated sectionally by providing several pairs of endless drive belts 7a, 7b. The belts of each pair rotate an equal number of spindles on the two faces of the spinning machine 1. Each pair of belts 7a, 7b is driven by its own drive member arranged symmetrically to paths of the belts of the respective pair. The drive member consists of a drive pulley 8 driven either directly by a motor 9 or via transmission connected to a central motor. Deviation pulleys 12 are associated with each drive pulley to cause the belts 7a, 7b to pass about opposite sides of the pulley 8 through large winding angles involving the entire periphery of the pulley 8 or more, and thus improve the traction effect of the pulley 8.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a spindle drive for ring spinning machines or the like.

0002

BACKGROUND OF THE INVENTION In a ring spinning frame, the individual spindles arranged on two sides of the spinning frame are driven by a single endlessly extending drive belt that is in tangential contact with the rotating pulleys of all spindles. It is known that it can be rotated. The belt is driven by a motor. Suitable tensioning rollers are provided between adjacent pairs of spindles to ensure sufficient tangential contact. However, this structure is difficult to start when there are a large number of spindles to be driven.

It has already been proposed to drive the belt by several drive units distributed along the spinning machine inside the circumference of the belt. The belt is deflected towards the drive unit by two deflection pulleys. To prevent the belt section from moving in two different planes, two deflection pulleys are arranged in the same plane and spaced apart in the longitudinal direction of the spinning machine, which corresponds to the deflected section. This means that these spindles in this position are not driven by the belt.

It is therefore necessary to provide each drive unit with a second belt to drive the spindles that do not engage the main belt. This second belt is driven by an associated pair of deflection pulleys.

However, this complicates the structure of the spinning frame in each drive unit. Furthermore, when starting
All drive units must accelerate at the same speed so that the main belt does not experience slippage or tension irregularities resulting in increased belt wear and reduced belt life.

The known construction has the further disadvantage that, as a result of the arrangement of the deflection pulley, the wrapping angle of the main belt around the drive pulley of the drive unit is limited and cannot exceed a certain value. As a result, for the same number and characteristics of spindles, a large number of drive units are generally required to prevent slippage.

[0007]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a drive device of the above-mentioned type which is simple in construction, inexpensive and which improves the driving conditions of the various spindles in the sense of preventing slippage as much as possible. The purpose is to eliminate the above drawbacks by doing so.

[0008]

SUMMARY OF THE INVENTION The object is achieved according to the invention in a spindle drive of a ring spinning machine or the like, in which the spindle is rotated by tangential contact between a respective spindle pulley and an endless drive belt. It comprises several pairs of drive belts, each pair of belts rotating the same number of spindles on the two faces of the spinning machine, each pair of belts having its own belt arranged substantially symmetrically in the path of the respective pair of belts. This is achieved by a spindle drive device characterized in that it is driven by a drive member.

Preferably, the two belts of each pair pass around the same drive pulley on opposite sides of the circumference and in different planes, so that the entire circumference of the drive pulley is used for traction. Do it like this. This is not possible with a single belt wrap as in the known technology. Therefore, with the device according to the invention, the driving conditions are improved, the total number of drive units can be reduced or the number of driven spindles can be increased for the same number of drive units, and furthermore, the slip limit is increased. , thus reducing wear on the drive belt.

The drive member comprises a drive pulley, such that the pulley is associated with its own motor or receives motion from a transmission connected to a single motor. The device according to the invention does not require an auxiliary belt for driving a spindle excluded from the main drive;
A single belt arrangement does not involve complex structures as it only needs to have associated deflection elements. The deflection member may be common to adjacent belts. Since each drive unit is associated with an independent belt pair, differential acceleration of one unit relative to another unit during start-up has no effect on the belts. The invention will now be explained with reference to illustrated embodiments.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The illustrated ring spinning frame 1 comprises a plurality of spindles 2 arranged on two sides of the spinning frame (only some spindles are shown by way of example), each spindle being tangential to a drive belt, as is known. A drive pulley 3 that engages with is provided below. The tailstock of the spinning frame 1, which carries the control elements for the drawing unit 4a, is indicated by 4, while the spinning frame headstock, which mainly carries the suction elements, is indicated by 5. The tension roller 6 is the pulley 3
Place it between the pairs of. All these are known.

[0012] To drive the spindle 2, the invention comprises a segmental drive. In this embodiment, the number of divisions is two. The spindles 2 of the sections have respective drive belts 7a,
7b, each pair of belts rotates the same number of spindles 2 on the two sides of the spinning frame 1. It is not necessary that each pair of belts 7a, 7b drive the same total number of spindles 2. This can be inferred from FIG. In this figure, the belt pair 7a, 7b on the left drives fewer spindles 2 than the pair on the right. However, for manufacturing economic reasons,
It is preferred to divide the drive so that each belt pair 7a, 7b drives the same number of spindles 2.

Each belt pair 7a, 7b is driven by its own drive member 8. Said drive member consists of a main drive pulley arranged substantially symmetrically with respect to the trajectory of the associated belt pair 7a, 7b. Pulley 8 is actuated directly by its own electric motor 9. Each belt pair 7a
, 7b run around deflection pulleys 10, 11 with vertical axes. These pulleys are common to the adjacent belts 7a, 7b and are connected to the stretching unit 4a by known means.
(Figure 2).

As shown in FIGS. 2 and 4, this arrangement allows the adjacent belts 7a, 7b to alternately move in different horizontal planes, but each belt remaining in its own plane, so that the respective spindles 2 This means that regular operation is guaranteed. There are two further deflection pulleys 12 in the drive unit.
are provided in diametrically opposed positions around the associated drive pulley 8 and in different planes. Pulley 12 is suitably arranged so that belts 7a, 7b follow a substantially S-shaped path by passing on either side of pulley 8 through a relatively wide wrapping arc. The arc has a total of 8 pulleys.
occupies the entire circumference of

The above arrangement makes it possible to use the entire circumference of the pulley 8 as a traction surface (even in a different plane). Therefore, divide the belt like this,
By arranging it symmetrically around the drive member 8, a total wrap angle equal to at least 360° can be obtained. This would not be possible if only one belt was provided, which would pass around the pulley 8 in a known manner. With the same number of driven pulleys, the improved wrap angle obtained by the device of the invention provides a larger edge to prevent slippage, or alternatively allows the number of drive points along the spinning frame 1 to be reduced. This reduces the difficulty of drive synchronization.

For example, by appropriately arranging the deflection pulley 12 on a diameter parallel to the longitudinal direction of the spinning machine 1, the winding angle of each belt 7a, 7b exceeds 180°,
The total winding angle of the two belts 7a and 7b exceeds 360°. The high expenditure due to the arrangement of several belts is therefore compensated for by the great regularity of the spindle drive. All working irregularities are eliminated directly within the part of the spinning machine where they occur, since they do not affect the rest of the spinning machine.

Instead of providing an individual motor 9 for each drive member 8, it is possible to provide a single central motor 13 in the headstock 5 of the spinning frame 1, as shown for example in FIG. Via the device 14 various pulleys 8 can be driven.

With the device of the invention, the spindle drive can be achieved by adding to the mechanical part of the stretching unit 4a a power transmission part synchronized with the spindle 2, such as a motor 4b controlled by an inverter 4c depending on the frequency. , the stretching unit can be separated from the drive in order to take advantage of the regularity of action of both drives. The number of separate spindle drive units can differ from that illustrated and the belt 7a of the drive member 8
, 7b can also be varied by providing additional deflection pulleys to further improve the wrapping angle of the belt around pulley 8.

[Brief explanation of the drawing]

FIG. 1 is a plan view of a first embodiment of a drive device of the present invention.

FIG. 2 is a side view of the device of FIG. 1;

3 is an enlarged view of the drive unit of the device of FIG. 1; FIG.

FIG. 4 is an enlarged view of a second embodiment of the drive device of the device of the present invention.

[Explanation of symbols]

1 Ring spinning machine 2 Spindle 3 Drive pulley 4a Stretching unit 4 Tailstock 5 Headstock 6 Tension roller 7a Drive belt 7b Drive belt 8 Drive member 9 Electric motor 10 Deflection pulley 11 Deflection pulley 13 Center motor 14 Transmission device

Claims (9)

[Claims] 1. A spindle drive of a ring spinning machine or similar, in which the spindle is rotated by tangential contact between a respective spindle pulley and an endless drive belt, comprising several pairs of drive belts, each pair of drive belts characterized in that the belts rotate the same number of spindles on the two faces of the spinning machine, each pair of belts being driven by its own drive member arranged substantially symmetrically in the path of the belts of the respective pair; spindle drive device. 2. Apparatus according to claim 1, characterized in that the drive members each consist of a respective drive pulley operated by its own motor. 3. Device according to claim 1, characterized in that the drive members consist of respective drive pulleys operated by a single central motor via a transmission. 4. At least one pair of deflection pulleys are provided on each drive member, the belt being associated with the drive member in diametrically opposed positions and in different planes, the belt generally encompassing the entire circumference of the drive member. 4. A device according to any one of claims 1 to 3, characterized in that the device is adapted to take a substantially S-shaped path by passing around both sides of the drive member through a wrapping angle of . 5. Device according to claim 1, characterized in that adjacent pairs of belts slide around a common deflection pulley in connection with adjacent parts. 6. Device according to claim 1, characterized in that adjacent belts move in two alternately different horizontal planes. 7. Device according to claim 1, characterized in that different pairs of belts engage different numbers of spindles. 8. Device according to claim 1, characterized in that different pairs of belts engage the same number of spindles. 9. Deflection rollers are provided on the drive member such that the belt takes a path around the drive member through an angle of more than 180° in different planes. 9. A device according to any one of claims 1 to 8.