Loom driving system

Abstract

The utility model provides a driving system of a weaving machine, which comprises a main transmission shaft, a first driving subsystem and a second driving subsystem, the first driving subsystem is used for driving an opening device to enable warps to move up and down, the second driving subsystem is used for driving a going part to swing, and the first driving subsystem comprises a first driving shaft and a cam mechanism. The cam structure comprises a cam shaft and at least two cam pairs, each cam pair comprises a heald frame first conjugate cam and a heald frame second conjugate cam, the heald frame first conjugate cams and the heald frame second conjugate cams are both installed on the cam shaft, and the heald frame first conjugate cams and the heald frame second conjugate cams in each cam pair are both provided with four convex corners. And the heald frame first conjugate cam and the heald frame second conjugate cam are configured, so that when the cam shaft rotates for one circle, the rocker completes four working cycles through the first cam follower and the second cam follower. According to the utility model, a plurality of different interweaving modes are woven by using one driving system.

Description

Technical Field

[0001] This utility model relates to the field of looms, and more specifically to a loom drive system. Background Technology

[0002] In existing technology, the reed of a loom moves in an oscillating manner, and it moves back and forth in each weaving cycle. Weft-beating elements, such as heald frames with heddles, move up and down. For a 1 / 1 interlacing pattern, each heald frame moves up and down in each weaving cycle. For more complex interlacing patterns, the heald frames may move up and down, or they may not move at all.

[0003] Existing technology, such as patent WO 2006 / 002962 A1, discloses a drive system comprising a first drive subsystem and a second drive subsystem for driving a weft-beating device and a reed holder of a loom. This drive system includes a main drive shaft with a switching wheel integrally formed or mounted on it. In a first switching position, the switching wheel meshes with the first and second drive wheels. The first drive wheel drives the first drive subsystem, which includes a first drive shaft integrally formed or connected to the first drive wheel. The first drive shaft is driven by the weft-beating device, causing the warp yarns forming the shed to move up and down. The second drive wheel drives the second drive subsystem, which includes a second drive shaft integrally formed or connected to the second drive wheel. The second drive shaft is driven by the reed holder of the loom, causing the reed holder to move in a oscillating manner, particularly moving it back and forth to drive the weft yarn into the weave. The existing conjugate cam drive method, especially the loom reed seat drive method, with only one conjugate cam pair on the second drive shaft, makes it difficult to increase the loom speed and weft insertion rate, and further production efficiency has reached a bottleneck.

[0004] Therefore, it is necessary to provide a new technical solution. Utility Model Content

[0005] To address the technical problems existing in the prior art, this utility model discloses a loom drive system, the specific technical solution of which is as follows:

[0006] The loom drive system of this utility model includes a main drive shaft, a first drive subsystem for driving the sheathing device to move the warp yarns up and down, and a second drive subsystem for driving the reed holder to oscillate. The first drive subsystem includes a first drive shaft and a cam mechanism. The cam structure includes a camshaft and at least two cam pairs. Each cam pair includes a first conjugate cam and a second conjugate cam of the heald frame. Both the first and second conjugate cams are mounted on the camshaft. During weaving, the first drive shaft is connected to the main drive shaft, and the camshaft is connected to the first drive shaft. Each cam pair has four convex angles for both the first and second conjugate cams of the heald frame. The four convex angles of the first conjugate cam are respectively located on the cam wheel of the first conjugate cam. The four convex angles of the second conjugate cam of the heald frame extend within a quarter of the circumference of the cam profile of the second conjugate cam of the heald frame, and the first cam follower and the second cam follower are respectively connected to the first conjugate cam of the heald frame and the second conjugate cam of the heald frame. The first conjugate cam of the heald frame and the second conjugate cam of the heald frame of each cam pair are configured such that when the camshaft rotates one revolution, the rocker arm completes four working cycles through the first cam follower and the second cam follower. In the weaving operation, the camshaft rotates at a speed of one-eighth of the loom speed, and the cam profile of the first conjugate cam of the heald frame and the second conjugate cam of the heald frame of each cam pair is configured such that when the camshaft rotates one-eighth of a revolution, the relevant warp yarn produces one upward or downward movement.

[0007] Furthermore, the cam mechanism includes several rockers, wherein the number of rockers is equal to the number of logarithms of the cam pair.

[0008] Furthermore, each rocker arm cooperates with a first cam follower and a second cam follower, and the first cam follower and the second cam follower are respectively driven and connected to the first conjugate cam and the second conjugate cam of the heald frame in a cam pair.

[0009] Furthermore, the cam mechanism has an even number of cam pairs.

[0010] Furthermore, the cam mechanism has two or four cam pairs.

[0011] Furthermore, the camshaft is connected to the first drive shaft via a gear transmission device comprising a first bevel gear and a second bevel gear.

[0012] Furthermore, the second drive subsystem includes a second drive shaft, which is connected to the main drive shaft during weaving operations. The second drive subsystem includes a reed rod unit that is oscillating around the reed rod shaft, and a reed drive unit for driving the reed rod unit. The reed drive unit includes a first reed conjugate cam and a second reed conjugate cam, both of which are mounted on the second drive shaft and rotate with it. The reed rod unit includes a first cam follower and a second cam follower, which are respectively driven and connected to the first reed conjugate cam and the second reed conjugate cam in a one-to-one correspondence.

[0013] Furthermore, the second drive shaft rotates at half the speed of the loom, and both the first conjugate cam and the second conjugate cam of the reed seat in the second drive subsystem have two convex angles. Each convex angle of the first conjugate cam extends within half the circumference of the first conjugate cam, and each convex angle of the second conjugate cam extends within half the circumference of the second conjugate cam.

[0014] Furthermore, the cam profiles of the first conjugate cam and the second conjugate cam of the reed seat in the second drive subsystem are configured such that the reed rod unit completes two working cycles when the second drive shaft rotates one revolution.

[0015] This utility model has the following beneficial effects:

[0016] This invention relates to a loom drive system that uses a single drive system to weave several different interlacing patterns. This drive system is used to move the warp yarns up and down and drive the reed, even when the second drive subsystem for driving the reed completes two working cycles in one rotation of the second drive shaft. With the second drive shaft maintaining its original speed, this loom drive system allows the reed to perform two weft insertions, directly doubling the weft insertion rate and thus doubling the production efficiency.

[0017] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the structure of the loom drive system of this utility model;

[0020] Figure 2 This is a schematic diagram of the second drive subsystem of the present invention for driving the reed seat to swing.

[0021] Figure 3 This is a schematic diagram of the cam mechanism (without housing) of the first drive subsystem of this utility model;

[0022] Figure 4 for Figure 3 Side view of the cam mechanism;

[0023] Figure 5 for Figure 4 Top view of the cam mechanism;

[0024] Figure 6 This invention comprises two conjugate cams and two cam followers in a pair of cams, wherein the two conjugate cams are configured for 1 / 1 interleaving;

[0025] Figure 7 This invention comprises two conjugate cams and two cam followers in a pair of cams, wherein the two conjugate cams are configured for 2 / 2 interleaving;

[0026] Figure 8 This invention comprises two conjugate cams and two cam followers in a pair of cams, wherein the two conjugate cams are configured for 3 / 1 interleaving;

[0027] Figure 9 This invention comprises two conjugate cams and two cam followers in a pair of cams, wherein the two conjugate cams are configured for 1 / 3 interleaving. Detailed Implementation

[0028] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0029] In the description of this utility model, it should be understood that the terms "upper," "lower," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0030] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0031] In loom weaving operations, a weft-beating operation is performed once per weaving cycle. In the context of this application, "weaving speed" is defined as the number of weaving cycles per unit time, or in other words, the number of weft-beating operations performed by the reed per unit time. Typically, one weft yarn is inserted per weaving cycle. A "full rotation of the camshaft" or "one revolution of the camshaft" is defined as a camshaft rotating 360°. The cam mechanism causes movement of the associated warp yarns. Particularly in embodiments, the weft-beating device includes multiple heald frames driven by a cam mechanism, wherein the cam mechanism causes the heald frames to move up and down. One working cycle of the associated warp yarn is defined as one up-and-down movement or one down-and-up movement of the warp yarn, particularly achieved by driving the heald frames. Since the associated warp yarn moves upward once within one-eighth of a camshaft rotation and downward once within one-eighth of a camshaft rotation, depending on the number and design of the cam profiles, a maximum of four working cycles can be performed per camshaft rotation.

[0032] The camshaft rotates at one-eighth of the weaving speed. Therefore, one working cycle driving the heald frame requires two weaving cycles. Depending on the cam profile design, a working cycle can be performed in two consecutive weaving cycles or in two non-consecutive weaving cycles.

[0033] Please see Figures 1 to 9 , Figure 1 This is a schematic diagram of the structure of the loom drive system of this utility model; Figure 2 This is a schematic diagram of the second drive subsystem of the present invention for driving the reed seat to swing.

[0034] Figure 3 This is a schematic diagram of the cam mechanism (without housing) of the first drive subsystem of this utility model;

[0035] Figure 4 for Figure 3 Side view of the cam mechanism; Figure 5 for Figure 4 Top view of the cam mechanism; Figure 6 This invention comprises two conjugate cams and two cam followers in a pair of cams, wherein the two conjugate cams are configured for 1 / 1 interleaving; Figure 7 This invention comprises two conjugate cams and two cam followers in a pair of cams, wherein the two conjugate cams are configured for 2 / 2 interleaving; Figure 8 This invention comprises two conjugate cams and two cam followers in a pair of cams, wherein the two conjugate cams are configured for 3 / 1 interleaving; Figure 9 This invention comprises two conjugate cams and two cam followers in a pair of cams, wherein the two conjugate cams are configured for 1 / 3 interleaving.

[0036] like Figure 1 As shown, the drive system of the loom of this utility model includes a main drive shaft 2, a first drive subsystem 10 for driving the sheathing device 11 to move the warp yarns up and down, and a second drive subsystem 20 for driving the reed seat 21 to swing.

[0037] The first drive subsystem 10 includes a first drive shaft 12 for driving the opening device 11. During the weaving operation, the first drive shaft 12 is connected to the main drive shaft 2 via a first gear 3 and a second gear 4, and the first drive shaft 12 rotates at half the weaving speed.

[0038] The second drive subsystem 20 includes a second drive shaft 23. During weaving operations, the second drive shaft 23 is connected to the main drive shaft 2 via a third gear 5 and a first gear 3. The second drive subsystem 20 includes a reed rod unit 24 that is oscillating around a reed rod shaft 25, and a reed drive unit 26 for driving the reed rod unit 24. The reed 22 is mounted on the reed shaft 28 via a mounting component 27, which is fixedly connected to or integrally formed with the reed rod shaft 25. The reed drive unit 26 includes a first reed conjugate cam 30 and a second reed conjugate cam 31, which are mounted on the second drive shaft 23 and rotate with it. The reed rod unit 24 includes two cam followers, designated as the first cam follower 32 and the second cam follower 33. Each cam follower is associated with and driven by one of the two reed first conjugate cams 30 and 31. Specifically, one first cam follower 32 is associated with and driven by one reed first conjugate cam 30, and the other second cam follower 33 is associated with and driven by the other reed second conjugate cam 31. During the weaving operation, the second drive shaft 23 rotates at half the weaving speed.

[0039] Figure 2 The second drive subsystem 20 is shown in a schematic side view, as follows: Figure 1 and Figure 2 As shown, the second drive subsystem 20 is used to drive the reed holder 21 to swing around the reed holder shaft 25, as... Figure 2 The arrow in the diagram illustrates this. Figure 2 In the diagram, the reed support rod unit 24 is schematically represented by two lines. From Figure 2 As can be seen in more detail, the first conjugate cam 30 of the reed seat in the second drive subsystem 20 has two convex angles, and the second conjugate cam 31 of the reed seat has four convex angles. The two convex angles of the first conjugate cam 30 extend within half the circumference of the cam profile of the first conjugate cam 30, and the two adjacent convex angles of the second conjugate cam 31 extend within half the circumference of the cam profile of the second conjugate cam. The profile design of the first conjugate cam 30 and the second conjugate cam 31 of the reed seat in the second drive subsystem 20 ensures that the reed rod unit 24 (schematically shown) completes two working cycles when the second drive shaft 23 rotates one revolution.

[0040] Figures 3 to 5 Showing Figure 1 A first embodiment of the first drive subsystem 10. The first drive subsystem 10 includes a first drive shaft 12 and an opening device 11 with a cam mechanism 40. In some embodiments, the opening device 11 further includes... Figures 3 to 5 Covers not shown in the image are used to cover the cam mechanism 40. The cam mechanism 40 includes a camshaft 50 (see...). Figure 5The device includes several cam pairs 42 connected to the camshaft 50, and several rocker arms 41. In some embodiments, the sheathing device 11 includes heald frames (not shown) for moving the warp yarns up and down, wherein each rocker arm 41 drives one heald frame. The cam pairs are mounted on the camshaft. In some embodiments, the cam pairs are integrally formed with the camshaft. In other embodiments, at least some of the cam pairs, and in particular all of them, are separately manufactured and mounted on the camshaft.

[0041] Preferably, the number of cam pairs in the drive system is equal to the number of heald frames on the loom used with it.

[0042] In a preferred embodiment of the drive system, the number of rockers is equal to the number of cam pairs. The rockers are driven to rotate back and forth by their respective cam pairs, thereby moving the warp yarns up and down to form the shed. Specifically, in some embodiments, the rockers are connected to the heald frame, and the back-and-forth rotation of the rockers causes the heald frame to move up and down.

[0043] In some implementations, the cam pair and / or the camshaft with the cam pair are interchangeable, so that by changing the cam pair and / or the camshaft with the cam pair, the drive system can be used to weave different weaving patterns.

[0044] like Figure 4 As shown, each rocker arm 41 is equipped with two cam followers, namely a first cam follower 43 and a second cam follower 44. Each cam pair 42 includes two conjugate cams, namely a heald frame first conjugate cam 45 and a heald frame second conjugate cam 46. Each cam follower is associated with and driven by one of the two heald frame first conjugate cams 45 and second conjugate cams 46 in the relevant cam pair 42. That is, one first cam follower 43 is associated with and driven by one heald frame first conjugate cam 45 in the relevant cam pair 42, and the other second cam follower 44 is associated with and driven by the other heald frame second conjugate cam 46 in the relevant cam pair 42.

[0045] like Figure 5 As shown, in Figures 3 to 5 In the first embodiment shown, the number of cam pairs 42 in the cam mechanism 40 is even; for example, the cam mechanism 40 has four cam pairs 42. In other embodiments, the cam mechanism may have two cam pairs.

[0046] Figures 3 to 5The cam mechanism 40 shown includes a camshaft 50 and four cam pairs 42, each of which has two conjugate cams, namely a first conjugate cam 45 and a second conjugate cam 46, mounted on the camshaft 50. The camshaft 50 is connected to the first drive shaft 12. The camshaft 50 is connected to the first drive shaft 12 via a gear transmission 51, preferably a bevel gear transmission including a first bevel gear 52 and a second bevel gear 53. The gear ratio of the gear transmission 51 is 1 / 4, therefore the pitch circle radius of the second bevel gear 53 is four times that of the first bevel gear 52. Therefore, the camshaft 50 rotates at one-quarter the speed of the first drive shaft 12.

[0047] In some embodiments, during the weaving operation, the first drive shaft 12 rotates at half the loom speed. Then, due to the gear ratio of the gear transmission 51, the camshaft 50 rotates at one-eighth the loom speed. In other words, the camshaft 50 rotates 45° in one weaving cycle.

[0048] like Figure 5 The cam mechanism 40 shown can provide a variety of cam profiles, which can be selected to weave 1 / 1 interlacing, 1 / 3 interlacing, 2 / 2 interlacing or 3 / 1 interlacing, in other words, interlacing four times.

[0049] Figure 6 The illustration schematically shows one embodiment of a cam pair 42, which includes components for... Figure 5 The cam mechanism consists of two conjugate cams, namely the first conjugate cam 45 and the second conjugate cam 46. Figure 6 A first cam follower 43 and a second cam follower 44 are also shown, wherein each cam follower is associated with and driven by one of the two heald frame conjugate cams of the cam pair 42; that is, the first cam follower 43 is associated with and driven by one heald frame first conjugate cam 45 of the cam pair 42, and the other second cam follower 44 is associated with and driven by the other heald frame second conjugate cam 46 of the cam pair 42. The first cam follower 43 and the second cam follower 44 are mounted on a rocker arm 41. The rocker arm 41 is rotatable about an axis 47.

[0050] The cam profiles of the heald frame first conjugate cam 45 and the heald frame second conjugate cam 46 of the cam pair 42 are configured to cause the relevant warp yarn to move upward or downward once every eighth of a revolution of the camshaft 50. Figure 6In this embodiment, the cam pair 42 is configured to achieve four working cycles, meaning that for every revolution of the camshaft 50, the relevant warp yarns move up and down four times, with each upward and downward movement occurring within one-eighth of a revolution of the camshaft 50. The first conjugate cam 45 and the second conjugate cam 46 of the heald frame are arranged and configured such that one working cycle is completed in two consecutive weaving cycles.

[0051] exist Figure 6 In the embodiment, the first conjugate cam 45 of the heald frame in the cam pair 42 has four convex angles, namely, the first convex angle 61, the second convex angle 62, the third convex angle 63, and the fourth convex angle 64 of the first conjugate cam of the heald frame; the second conjugate cam 46 of the heald frame has four convex angles, namely, the first convex angle 71, the second convex angle 72, the third convex angle 73, and the fourth convex angle 74 of the second conjugate cam of the heald frame. The extensions of the first convex angle 61, the second convex angle 62, the third convex angle 63, and the fourth convex angle 64 of the first conjugate cam of the heald frame are within one-quarter of the circumference of the first conjugate cam 45. The extensions of the first convex angle 71, the second convex angle 72, the third convex angle 73, and the fourth convex angle 74 of the second conjugate cam of the heald frame are within one-quarter of the circumference of the second conjugate cam 46. Two adjacent convex angles of each cam pair 42 cause one working cycle, i.e., one up-and-down or down-and-up movement of the relevant warp yarn. The first conjugate cam 45 and the second conjugate cam 46 of each cam pair 42 are offset by approximately 45°. Therefore, a working cycle is generated when the camshaft 50 rotates more than 90°. As described above, if the camshaft 50 rotates at one-eighth of the loom speed, the camshaft 50 will rotate 45° in one weaving cycle. Therefore, in two working cycles, the camshaft 50 rotates more than 90°, producing one working cycle.

[0052] exist Figures 3 to 5 In the illustrated embodiment, the drive system has four pairs of cam pairs 42, each pair of cam pairs 42 being connectable to a heald frame (not shown) of the loom for moving the heald frame up and down. If the first conjugate cam 45 and the second conjugate cam 46 of the heald frame in each cam pair 42 have the following... Figure 6 As shown by the four convex corners, the drive system can perform two 1 / 1 interlacings, that is, in each weaving cycle, two heald frames rise and two heald frames fall.

[0053] In another implementation, such as Figure 6The drive system of the cam pair shown has two pairs of cam pairs 42, each of which can be connected to a heald frame of the loom to move the heald frame up and down. If each pair of cam wheels 42 has a first conjugate cam 45 for the heald frame and a second conjugate cam 46 for the heald frame, then... Figure 6 As shown by the four convex corners, the drive system can perform 1 / 1 interlacing, that is, in each weaving cycle, one heald frame rises and one heald frame falls.

[0054] In the embodiments, the cam mechanism has an even number of cam pairs. In particular, the cam mechanism has two or four pairs of cam pairs.

[0055] Figure 7 The cam profiles of the heald frame first conjugate cam 45 and heald frame second conjugate cam 46 in the cam pair 42 shown are also configured to cause the relevant warp yarn to move upward or downward once within one-eighth of a revolution of the camshaft 50. Figure 7 In this embodiment, the cam pair 42 is configured to achieve two working cycles, meaning that for every revolution of the camshaft 50, the relevant warp yarn undergoes two up-and-down movements, each of which occurs within one-eighth of a revolution of the camshaft 50. The first conjugate cam 45 and the second conjugate cam 46 of the heald frame are designed and arranged such that one working cycle is completed in two discontinuous weaving cycles. Figure 7 In the implementation shown, one work cycle is completed within four weaving cycles.

[0056] exist Figure 7 In this embodiment, the first conjugate cam 45 of the heald frame in the cam pair 42 has two convex angles: a first convex angle 61 and a second convex angle 62. The second conjugate cam 46 of the heald frame has two convex angles: a first convex angle 71 and a second convex angle 72. These convex angles 4 are arranged and configured such that after the camshaft 50 rotates one-eighth of a turn (i.e., within one weaving cycle) causing the relevant warp yarn to move up and down, the positions of the first cam follower 43 and the second cam follower 44 (and the relevant warp yarn positions) will be maintained until the next weaving cycle, that is, when the camshaft 50 rotates another one-eighth of a turn (i.e., 45°). Therefore, the four convex angles are arranged and configured to cause one working cycle, i.e., one up and down movement of the relevant warp yarn, when the camshaft 50 rotates half a turn (i.e., within four weaving cycles). Therefore, this cam mechanism can achieve 2 / 2 weaving.

[0057] Figure 8 Another embodiment of a cam pair 42 is schematically shown, which includes features for... Figure 5 The heald frame first conjugate cam 45 and heald frame drop conjugate cam 46 of the middle cam mechanism 40. Figure 8The diagram also shows a first cam follower 43 and a second cam follower 44, each cam follower being associated with and driven by one of two conjugate cams in a cam pair 42, i.e., one of the first cam followers 43 is associated with and driven by a first conjugate cam 45 in a heald frame of the associated cam pair 42, and the other second cam follower 44 is associated with and driven by a second conjugate cam 46 in another heald frame of the associated cam pair 42.

[0058] Figure 8 The cam profiles of the two heald frame first conjugate cams 45 and second conjugate cams 46 in the illustrated cam pair 42 are also configured to cause one upward or downward movement of the relevant warp yarn when the camshaft 50 rotates one-eighth of a turn. The heald frame first conjugate cams 45 and second conjugate cams 46 are designed and arranged such that one work cycle is completed in two consecutive weaving cycles.

[0059] exist Figure 8 In this embodiment, each conjugate cam in the cam pair 42 has two convex angles. These convex angles are arranged and configured such that after the camshaft 50 rotates a quarter turn (i.e., within two weaving cycles), causing the relevant warp yarns to move up and down, the positions of the first cam follower 43 and the second cam follower 44 (and the relevant warp yarn positions) are maintained into the next weaving cycle. Therefore, this cam mechanism enables 3 / 1 interlacing.

[0060] Figure 9 Another embodiment of a cam pair 42 is schematically shown, which includes a cam pair 42 for... Figure 5 The heald frame of the middle cam mechanism 40 has a first conjugate cam 45 and a second conjugate cam 46. Figure 9 The image also shows two other cam followers, namely a first cam follower 43 and a second cam follower 44. Each cam follower is associated with and driven by one of the two conjugate cams in a cam pair 42. Specifically, one of the first cam followers 43 is associated with and driven by a first conjugate cam 45 in a heald frame of the associated cam pair 42, and the other of the second cam followers 44 is associated with and driven by a second conjugate cam 46 in another heald frame of the associated cam pair 42. Figure 9 The design of the first conjugate cam 45 and the second conjugate cam 46 of the heald frame and Figure 8 The design of the first conjugate cam 45 and the second conjugate cam 46 of the heald frame is the same. However, with Figure 8 The difference is, Figure 9 The correspondence between the two conjugate cams and the cam follower in the model has been swapped. Because... Figure 9 The first conjugate cam and the cam follower are connected in a different way, and this cam mechanism can achieve 1 / 3 interlacing.

[0061] In the embodiments of this invention, each cam in each cam pair has one, two, three, or four convex angles. When each cam in each cam pair has four convex angles, the two conjugate cams in a cam pair are offset in the embodiments. When each cam in each cam pair has four convex angles, the two conjugate cams in a cam pair can be offset by 45°.

[0062] If the loom has two heald frames, in one embodiment, the drive system has two cam pairs, where each cam pair has two conjugate cams, each with four lobes. When using cam pairs where each conjugate cam has four lobes, the warp yarns complete four working cycles per revolution of the camshaft. This implementation allows for 1 / 1 weaving, where one heald frame rises and one heald frame falls in each weaving cycle.

[0063] If the loom has four heald frames, in one embodiment, the drive system has four cam pairs, where each conjugate cam in each cam pair has four convex angles. This implementation of the drive system allows for double 1 / 1 weave, meaning that in each weaving cycle, two heald frames rise and two heald frames fall.

[0064] If the loom has four heald frames, in one embodiment, the drive system has four cam pairs, wherein each conjugate cam in each cam pair is configured such that each cam pair causes two working cycles of the relevant warp yarns per revolution of the camshaft, and maintains the position of two weaving cycles between the two working cycles. This implementation of the drive system allows for 1 / 3 or 3 / 1 weaving.

[0065] If the loom has two heald frames, in one embodiment, the drive system has two cam pairs, wherein each conjugate cam in each cam pair has two convex angles, such that each cam pair causes two working cycles of the relevant warp yarns per revolution of the camshaft, and maintains a position for one weaving cycle between one upward movement and one downward movement. This implementation of the drive system allows for 2 / 2 weaving. If the loom has four heald frames, in one embodiment, the drive system has four cam pairs, wherein each conjugate cam in each cam pair has two convex angles, such that each cam pair causes two working cycles of the relevant warp yarns per revolution of the camshaft. This implementation of the drive system allows for double 2 / 2 weaving.

[0066] This invention relates to a loom drive system that uses a single drive system to weave several different interlacing patterns. This drive system is used to move the warp yarns up and down and drive the reed, even when the second drive subsystem for driving the reed completes two working cycles in one rotation of the second drive shaft. With the second drive shaft maintaining its original speed, this loom drive system allows the reed to perform two weft insertions, directly doubling the weft insertion rate and thus doubling the production efficiency.

[0067] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. In addition, those skilled in the art can combine and integrate the different embodiments or examples described in this specification.

[0068] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications and variations to the above embodiments within the scope of the present invention.

Claims

1. A loom drive system characterized by, The loom drive system comprises a main drive shaft (2), a first drive subsystem (10) for driving the shedding device (11) to move the warp yarns up and down, and a second drive subsystem (20) for driving the sley (21) to swing, wherein the first drive subsystem (10) comprises a first drive shaft (12) and a cam mechanism (40), the cam mechanism (40) comprises a cam shaft (50) and at least two cam pairs (42), each cam pair (42) comprises a harness first conjugate cam (45) and a harness second conjugate cam (46), the harness first conjugate cam (45) and the harness second conjugate cam (46) are both mounted on the cam shaft (50), in the weaving operation, the first drive shaft (12) is connected with the main drive shaft (2), the cam shaft (50) is connected with the first drive shaft (12), Each cam pair (42) has four cam angles, the four cam angles of the harness first conjugate cam (45) respectively extend in the range of one fourth of the cam profile perimeter of the harness first conjugate cam (45), the four cam angles of the harness second conjugate cam (46) respectively extend in the range of one fourth of the cam profile perimeter of the harness second conjugate cam (46), and the first cam follower (43) and the second cam follower (44) are respectively connected with the harness first conjugate cam (45) and the harness second conjugate cam (46) one by one, the harness first conjugate cam (45) and the harness second conjugate cam (46) of each cam pair (42) are configured so that the rocker (41) completes four working cycles through the first cam follower (43) and the second cam follower (44) when the cam shaft (50) rotates one circle, In the weaving operation, the cam shaft (50) rotates at one eighth of the loom speed, and the cam profiles of the harness first conjugate cam (45) and the harness second conjugate cam (46) of each cam pair (42) are configured to cause the relevant warp yarn to produce one upward or downward movement when the cam shaft (50) rotates one eighth of a circle.

2. The loom drive system according to claim 1, wherein The cam mechanism (40) comprises a plurality of rockers (41), wherein the number of the rockers (41) is equal to the number of the cam pairs (42).

3. The loom drive system of claim 2, wherein, Each rocker (41) cooperates with the first cam follower (43) and the second cam follower (44), the first cam follower (43) and the second cam follower (44) are respectively connected with the harness first conjugate cam (45) and the harness second conjugate cam (46) in one cam pair (42) one by one.

4. The loom drive system of claim 1, wherein, The cam mechanism (40) has an even number of cam pairs (42).

5. The loom drive system of claim 1, wherein, The cam mechanism (40) has two or four cam pairs (42).

6. The loom drive system of claim 1, wherein, The cam shaft (50) is connected with the first drive shaft (12) through a gear transmission device (51) comprising a first bevel gear (52) and a second bevel gear (53).

7. The loom drive system of claim 1, wherein, The second driving subsystem (20) comprises a second driving shaft (23) connected with the main driving shaft (2) in the weaving operation, wherein the second driving subsystem (20) comprises a sley bar unit (24) swingably arranged around a sley bar shaft (25), and a sley driving unit (26) for driving the sley bar unit (24), the sley driving unit (26) comprises a sley first conjugate cam (30) and a sley second conjugate cam (31), the sley first conjugate cam (30) and the sley second conjugate cam (31) are both mounted on the second driving shaft (23) and rotate with the second driving shaft (23), and the sley bar unit (24) comprises a first cam follower (32) and a second cam follower (33), the first cam follower (32) and the second cam follower (33) are respectively in one-to-one driving connection with the sley first conjugate cam (30) and the sley second conjugate cam (31).

8. The loom drive system of claim 7, wherein, The second driving shaft (23) rotates at half the speed of the loom, and the sley first conjugate cam (30) of the second driving subsystem (20) has two convex corners, the sley second conjugate cam (31) has four convex corners, each convex corner of the sley first conjugate cam (30) extends within half the circumference of the sley first conjugate cam, and the adjacent two convex corners of the sley second conjugate cam (31) extend within half the circumference of the sley second conjugate cam (31).

9. The loom drive system of claim 8, wherein, The cam profiles of the sley first conjugate cam (30) and the sley second conjugate cam (31) of the second driving subsystem (20) are configured such that the sley bar unit (24) completes two working cycles when the second driving shaft (23) rotates one circle.

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