CN1774531B - Transmission device of loom heald frame - Google Patents

Abstract

The invention relates to a transmission device for heald frames (10) of a weaving machine, having a drive shaft (13) for driving a transmission element (14), having a lever system (15) connected to the heald frame (10), and having connecting rods (28, 29) between the transmission element (14) and the lever system (15), said transmission element comprising a rocker (18) which is driven by the drive shaft (13) to perform a defined swinging movement and is connected to the lever system by means of a connection (30) which is adjustable in the longitudinal direction of the rocker (18) and two successive connecting rods (28, 29; 28 ', 29'), which are hinged to levers (31, 31 ') arranged rockably on shafts (32, 32').

Description

Transmission device of loom heald frame

technical field

The invention relates to a transmission for a heald frame of a loom, with a drive shaft for driving a transmission element that converts a rotary motion into a linear motion, and with a lever system that transmits the linear motion as a lifting motion to the heald frame , also with connecting rods between the transmission elements and the lever system.

Background technique

Such a transmission including a dobby, dobby loom, cam drive, eccentric drive or crankshaft drive is constructed so that the linear motion output from the drive shaft is transmitted by a certain amount and by a certain stroke to a fixed on the heald frame.

Contents of the invention

The object of the present invention is to provide a transmission of the type mentioned at the outset, in which the relationship between the movement of the transmission element and the heald frame, in particular the stroke, can also be varied.

This object is achieved by a transmission device for a heald frame of a loom. The transmission has a drive shaft that drives the transmission element, which converts the rotary motion into a linear motion, a lever system that transmits the linear motion as a lifting motion to the heald frame, and an interposition between the transmission element and the lever system. between connecting rods. According to the invention, said transmission element comprises a rocker driven by a drive shaft in a defined rocking motion and connected to the Said lever system, said connecting rod is articulated to a lever arranged swingably on an axle.

By selecting the position of the pivot axis of the lever and/or by selecting the length of the lever and thus also the length of the connecting rod part, the travel of the heald frame movement relative to the travel of the drive element can be varied and adapted to the loom conditions.

In order to be able to transform the transmission device of the heald frame for determining the movement stroke between the transmission element and the heald frame into a transmission device capable of changing the movement stroke of the heald frame relative to the movement stroke of the transmission element, there are used for the drive shaft, the transmission element , The support structure of the connecting rod and lever system, which preferably includes an exchangeable intermediate part, in which the steering shaft of the lever to which the connecting rod is articulated is arranged. Therefore, the series of looms designed without the possibility of changing the motion stroke can be modified according to the special requirements of customers (also can be installed afterwards when necessary), so that the motion stroke can be changed.

Description of drawings

Further features and advantages of the invention result from the following description and preferred embodiments of the embodiments shown in the drawings. in:

Figure 1 shows a cross-sectional view of a transmission for a heald frame of a loom according to the invention, with separate connecting rods and a fixedly supported lever;

Figure 2 shows a sectional view of an embodiment similar to that of Figure 1, with an adjustable bearing lever;

Figure 3 shows a sectional view similar to that of Figure 1, with a motor-adjustable lever;

Figure 4 shows a sectional view similar to that of Figure 1, with a lever adjustable by a transmission element;

FIG. 5 shows a sectional view of an embodiment with a lever that can also be adjusted by means of a transmission element;

Figure 6 shows an embodiment with a triangular lever and separately articulated connecting rod parts;

Figure 7 shows an embodiment similar to that of Figure 6, with the connecting rod arranged below the drive shaft.

Detailed ways

The transmission shown in FIG. 1 is used for the lifting movement of the heald frames 10 of the loom, which are arranged one behind the other in the running direction of the warp threads. Only two side parts 11, 12 are shown in this weaving machine. The transmission comprises a drive shaft 13 , which is for example a crankshaft or an eccentric shaft, and drives a transmission element 14 , which converts the rotational movement of the drive shaft 13 into a linear movement. These linear movements are transmitted to the heald frame 10 as lifting movements by means of the lever system 15 . The transmission element consists of a transmission rod 16 connected to a rocker 18 pivotable about a fixed axis 17 .

The lever system 15 comprises a double-armed toggle lever 19 pivotable about a fixed axis 20 . The elbow joint lever 19 is connected with another elbow joint lever 22 that can rotate around a fixed shaft 23 via a rod 21 . Connected to the laterally extending columns of the elbow joints 19 , 22 are transfer rods 24 which act on connecting elements 25 guided on linear guide rails 26 . The connecting element 25 has a hook-shaped end in which the connecting piece of the heald frame 10 engages. The heald frames 10 are guided on guide rails in a manner not shown in detail. Additional toggle levers, transfer levers and connecting elements can be provided as required. It is also possible to use other types of transfer rods and connecting rods, such as disclosed by EP 742 298 A.

The free arm 27 of the toggle lever 19 is articulated to the rocker 18 by means of connecting rods 28 , 29 . The rocker 18 has a connecting element 30 which can be adjusted in the longitudinal direction of the rocker 18 in order to adjust the amount of linear movement. The connecting rods 28 , 29 are hinged on a common lever 31 which is pivotable about a fixed steering axis 32 .

The rocker 18 of the transfer element 14 executes a defined defined movement. The relationship in which the toggle levers 19, 22 move and the heald frame 10 depends on the position of the steering shaft 32 of the lever 31 and its length (matched to the length of the connecting rods 28, 29). The movement relationship of the heald frame 10 relative to the rocker 18 can be varied by means of levers 31 of different lengths and/or different positions of the steering shaft 32 .

The entire transmission has a common, preferably weaving machine-dependent support structure, which in this embodiment has the form of a closed housing 33 that accommodates an oil tank 34 . The lever 31 and the steering shaft 32 are located in an intermediate piece 35 which is arranged releasably and releasably between a housing part 36 comprising the drive shaft 13 and the transmission element 14 and a housing part 37 housing the lever system 15 and the linear guide 26 replace. In the case of a standard weaving machine, there is an intermediate piece without lever 31 steering shaft. The rocker 18 and the free arm 27 of the toggle lever 19 are connected directly by means of a connecting rod which passes through. If the customer requests a weaving machine of a special specification, with the possibility of changing the stroke of the heald frame in relation to the stroke of motion of the transmission element, then this intermediate piece 35 is used, which has a steering shaft and a lever 31 on which it is then articulated Rods 28, 29.

In the embodiment of FIG. 2, the position of the lever 31 steering axis 32 can be changed. The steering shaft is movable on a slightly curved guide rail 38 and can be positioned in the desired position. As a result, the relationship between the movement of the lever system 15 and thus also the movement of the heald frame 10 relative to the transmission element 14 can be changed without having to replace the lever 31 and the connecting rods 28 , 29 . The adjustment and positioning of the steering shaft 32 is preferably performed manually from the outside of the intermediate part 35 . The guide rail 38 is preferably bent in such a way that the lever 31 can be pivoted around the joint 47 of the two connecting rods 28 , 29 without thereby changing the position of the corresponding heald frame 10 .

In the embodiment of FIG. 3 , the position of the lever 31 steering axis 32 can also be changed. The change of position takes place by means of a transmission 39 which can be operated by an electric motor.

In the embodiment shown in FIG. 4 , the steering shaft 32 is arranged on a dual-arm equal-arm balance bar 41 that can rotate around an axis 40 . The equal-arm type balance bar 41 is hinged on the rocking bar 18 through a bar 42 . The above-mentioned articulation is carried out at a distance from the articulation point where the connecting rod 28 is articulated on the rocker 18 .

The embodiment of FIG. 5 is very similar to the embodiment of FIG. 4 . The difference is that the equal arm type balance bar 41 is hinged on the position of the rocking bar 18 that is also hinged to the connecting rod 28 by means of a rod 43 . In the embodiment of Figures 4 and 5, a single steering shaft can be provided for the lever 31 on the equal-arm balance bar 41, so that the movement stroke of a single heald frame 10 can be designed differently from the movement strokes of other heald frames when necessary. Element 14. The equilibrator 41 can have other articulation points, for example an articulation point 44 for the rod 43 or for the lever 31 . Likewise, there may be two or more articulation points for the steering shaft 32 . Instead of multiple articulation points, it is also possible to have slotted guides and positioning elements.

In the embodiment of FIG. 6 there is a triangular frame lever 31 ′ in side view. The lever 31 ′ is located in a middle part 35 ′ which is longer than the middle part 35 of FIG. 1 . As a result, the connection elements 28', 29' can be correspondingly lengthened. In addition, the connecting rods are articulated at respective respective articulation points 45, 46 on the lever 31'.

As shown in Figure 7, the drive shaft 13 and the transmission element 14 can be easily arranged so that the connecting rods 28", 29" are below and the steering shaft 32" is above. 1-5 are used in the embodiment.

In a different embodiment, the oil tank is only present in the housing part 36, while the intermediate piece 35 and the housing part 37 do not include the oil tank. In another embodiment, the housing part 36 and the intermediate part 35 are formed in one piece. In another embodiment, the housing part 37, the intermediate piece 35 and the housing part 36 are an inseparable support structure.

Furthermore, all exemplary embodiments can also be modified in such a way that they have more than two connecting rods, which are each connected by means of a lever supported by the steering shaft.

The drive shaft 13 can have a drive motor, not shown, mounted on the outside of the housing part 36 . This own driving motor is not mechanically connected with the main driving motor of the loom, but it runs synchronously with the main driving motor of the loom.

Claims (8)

1. the transmission device of harness frame in aweaving machine, have a driving shaft that drives driving element, to rotatablely move and change linear movement into, have one linear movement is delivered to lever system on the heald frame as elevating movement, also have the connecting rod that is between driving element and the lever system, it is characterized in that, described driving element comprises rocking bar (18), this rocking bar drives by driving shaft (13) and carries out a kind of oscillating motion of regulation, and by vertical adjustable connector (30) and two connecting rods (28,29 in succession along rocking bar (18); 28 ', 29 ') be connected to described lever system, described connecting rod is hinged on the lever (31,31 ') that unsteadily is arranged on the steering spindle (32,32 ', 32 ").

2. by the described transmission device of claim 1, it is characterized in that, connecting rod (28 ', 28 ", 29 ', 29 ") separately by means of independent hinge point (45,46) be hinged on lever (31 ', on 31 ").

3. by claim 1 or 2 described transmission devices, it is characterized in that the position of steering spindle (32,32 ', 32 ") can change.

4. by the described transmission device of claim 3, it is characterized in that having the device of the position that can manually operatedly be used to change steering spindle (32,32 ', 32 ").

5. by the described transmission device of claim 3, it is characterized in that, have can motor operation transmission device (39), be used to change the position of steering spindle (32,32 ', 32 ").

6. by the described transmission device of claim 3, it is characterized in that, connecting rod (28,29) hinged lever (31) utilize steering spindle (32,32 ', 32 ") be bearing in one can adjust etc. on the arm-type balancing pole (41).

7. by the described transmission device of claim 6, it is characterized in that, wait arm-type balancing pole (41) to be connected with the rocking bar (18) of driving element (14) by means of connecting rod (42,43).

8. by claim 1 or 2 described transmission devices, it is characterized in that, has the supporting structure (33) that is used for driving shaft (13), driving element (14), connecting rod (28,29) and lever system (15), this supporting structure comprises removable middleware (35,35 '), the inside be provided with connecting rod (28,29) hinged lever (31,31 ', the steering spindle of 31 ") usefulness (32; 32 ', 32 ").

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