Rapier loom transmission device and synchronous positioning method

Abstract

The invention discloses a rapier loom transmission device and a synchronous positioning method. A cam and a roller are matched to drive a pressing arm to do beating-up action of front-back reciprocating swing. The first supporting assemblies support the axle, the second supporting assemblies support the pressing arm, the two sets of symmetrically-arranged first supporting assemblies provide more balanced support for the axle, asymmetric force caused by single-side supporting is reduced, and therefore the radial run-out and unbalance loading phenomena are reduced. The two groups of first supporting assemblies are also beneficial to dispersing the load and enhancing the stability. The cam is in rolling fit with the roller located in the second through hole through the third through hole, so that the transmission path between the cam and the pressing arm is more direct, the structure is more compact, and the transmission accuracy is improved. Moreover, the wheel shaft is coaxially and fixedly connected with the power shaft and the gear in sequence, and through the design of the rocker arm and the cross shaft, the rotary motion of the power shaft is converted into the precise reciprocating swing of the fan-shaped teeth, so that the transmission structure of original weaving machine equipment is simplified, transmission parts are reduced, and the overall weight of the structure is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of textile machines, and in particular to a rapier loom transmission device and a synchronous positioning method. Background Art

[0002] As the core equipment of the textile industry, the stability and accuracy of the transmission system of the rapier loom directly affect the fabric quality and production efficiency. The transmission device of the traditional rapier loom is usually composed of a cam mechanism, a connecting rod mechanism and a gear set. The cam is driven to rotate by the power shaft, thereby driving the weft beating mechanism and the weft insertion mechanism to work together. The existing rapier loom has the following significant defects: (1) The traditional cam box mechanism adopts a single-sided support design, which causes radial runout and eccentric load when the wheel shaft rotates at high speed, aggravating bearing wear and reducing the uniformity of the weft insertion surface; (2) The multi-stage connecting rod transmission chain has significant cumulative errors, and the weft beating phase deviation is ≥±2°, which requires frequent shutdown adjustments, resulting in low work efficiency. Summary of the invention

[0003] In view of the above technical problems, the present invention provides a rapier loom transmission device and a synchronous positioning method to overcome at least one of the drawbacks.

[0004] The technical solution adopted by the present invention is as follows: a rapier loom transmission device, comprising a base, a cam box mechanism and a weft yarn handover transmission mechanism, wherein: the cam box mechanism comprises a wheel shaft, a pressure arm, a cam, a roller, a first support assembly and a second support assembly, the number of the first support assembly is two groups, the two groups of first support assemblies are symmetrically installed on one side of the base, and the second support assembly is installed on the other side of the base, the first support assembly is provided with a first through hole for rotatably installing the wheel shaft, the second support assembly is provided with a second through hole for rotatably installing the pressure arm, the cam is coaxially fixedly connected to the wheel shaft, the roller is coaxially fixedly connected to the pressure arm, the base is provided with a third through hole for the roller to pass through, and the third through hole is connected to the second through hole;

[0005] The weft yarn handover transmission mechanism includes a power shaft, a gear, a rotating arm, a rocker arm, a cross shaft and fan-shaped teeth. One end of the power shaft is coaxially fixedly connected to the wheel axle through a connecting piece, and the other end of the power shaft is coaxially fixedly connected to the gear. The rotating arm is eccentrically installed on the end face of the gear. The rocker arm is rotatably connected to the rotating arm, and the rotation axis of the rocker arm does not coincide with the rotation axis of the rotating arm. The cross shaft is rotatably connected to the rocker arm, and the fan-shaped teeth are fixedly connected to the cross shaft.

[0006] Optionally, the first support assembly includes a first support plate and a second support plate, the first support plate is provided with the first through hole, the second support plates are symmetrically arranged on both sides of the first support plate, the second support plate is fixedly connected to the base, the second support plate is a right-angled triangle structure, one right-angled side of the second support plate is fixedly connected to the first support plate, and the other right-angled side of the second support plate extends toward the base away from the other group of first support assemblies.

[0007] Optionally, it also includes a connecting plate, one end of which is connected to the first support plate, and the other end of the connecting plate is connected to the first support plate of another group of first support assemblies. A radially extending protrusion is provided on the side of the first support plate facing away from the base, and the connecting plate and the protrusion are connected by a first screw.

[0008] Optionally, the second support assembly includes a support cylinder and tilting blocks arranged on both sides of the support cylinder, the support cylinder is provided with the second through hole, and the axial length of the support cylinder is greater than or equal to the distance between the two first support plates.

[0009] Optionally, the rocker arm includes a first connecting arm and a second connecting arm connected to the first connecting arm at an angle, the first connecting arm is rotatably connected to the rotating arm through a first bearing, the second connecting arm includes a first connecting end and a second connecting end arranged corresponding to the first connecting end, the cross shaft is rotatably connected to the first connecting end through a second bearing, and the cross shaft is rotatably connected to the second connecting end through a third bearing.

[0010] Optionally, the cross shaft includes a first connecting shaft, a second connecting shaft, a third connecting shaft and a fourth connecting shaft, the first connecting shaft is coaxially connected to the second connecting shaft, the third connecting shaft is coaxially connected to the fourth connecting shaft, the first connecting shaft and the third connecting shaft are set at an angle, the first connecting shaft is rotatably connected to the first connecting end through the second bearing, the second connecting shaft is rotatably connected to the second connecting end through the third bearing, the third connecting shaft is rotatably installed on the weft introduction box through the fourth bearing, and the fourth connecting shaft is rotatably installed on the weft introduction box through the fifth bearing.

[0011] Optionally, a protrusion is provided on a side of the gear facing the rotating arm, and the protrusion is provided with a slide groove. The rotating arm includes a bearing seat and a connecting arm integrally connected to the bearing seat, the first bearing is arranged inside the bearing seat, the bottom surface of the connecting arm is slidably connected to the slide groove, the protrusion is provided with a pressure block, and the side wall of the connecting arm is provided with a first inclined surface along the length direction, the pressure block is provided with a second inclined surface matching the first inclined surface, the second inclined surface is pressed on the upper surface of the second inclined surface, and the pressure block is mounted on the protrusion by a second screw.

[0012] Optionally, the base is provided with two groups of cam box mechanisms and two groups of weft yarn handover transmission mechanisms, the cam box mechanisms and the weft yarn handover transmission mechanisms are connected one by one, cross beams are respectively provided at both ends of the base, the weft insertion box is installed on the cross beam, and the wheel axle is coaxially connected to the adjacent wheel axle through a coupling.

[0013] The present invention also discloses a synchronous positioning method for a rapier loom transmission device, comprising the following steps: the base is provided with two positioning fixtures along the axial direction, the wheel axle is provided with a positioning groove movably matched with the positioning fixture, the two positioning grooves are arranged in a mirror image, and during initial operation, the positioning fixtures are matched with the positioning grooves one by one, the connecting piece between the power shaft and the wheel axle is loosened, the gear is fixed to the wall panel by a third screw, and the distance between the fourth connecting shaft of the cross shaft and the gear is measured by a positioning ruler. If the distance does not meet the standard, the third screw is rotated to adjust the position of the gear until the measured distance between the fourth connecting shaft and the gear meets the standard, the third screw is tightened, and the connecting piece between the power shaft and the wheel axle is re-fixed.

[0014] Optionally, the positioning tool includes a hollow fourth screw, a spring and a push rod, the outer wall of the fourth screw is provided with a thread that cooperates with the base, one end of the spring is arranged inside the fourth screw, and the other end of the spring is connected to the push rod, and the push rod is movably matched with the positioning groove.

[0015] The beneficial effect of the present invention is that the pressing arm is driven to perform a reciprocating swinging action of beating the weft by the cooperation of the cam and the roller. The first support assembly supports the wheel shaft, and the second support assembly supports the pressing arm. The two groups of symmetrically arranged first support assemblies provide more balanced support for the wheel shaft, reduce the asymmetric force caused by the unilateral support, and thus reduce radial runout and eccentric load. The two groups of first support assemblies also help to disperse the load and enhance stability. The cam rolls with the roller located in the second through hole through the third through hole, so that the transmission path between the cam and the pressing arm is more direct, the structure is more compact, and it helps to improve the accuracy of the transmission. In addition, the wheel shaft is coaxially fixedly connected with the power shaft and the gear in sequence. Through the design of the rocker arm and the cross shaft, the rotational motion of the power shaft is converted into the precise reciprocating swing of the fan-shaped teeth, which simplifies the transmission structure of the original loom equipment, reduces the transmission components, reduces the weight of the entire structure, reduces the structural load, and reduces the reciprocating impact of the overall loom transmission structure, which is more conducive to the high-speed operation of the loom equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A schematic diagram of the structure of a rapier loom transmission device according to an embodiment of the present invention;

[0017] Figure 2 A schematic diagram of the coaxial connection between the wheel shaft and the power shaft of the rapier loom transmission device provided in an embodiment of the present invention;

[0018] Figure 3 A schematic diagram of a first supporting assembly of a rapier loom transmission device according to an embodiment of the present invention;

[0019] Figure 4 A schematic diagram of a second supporting assembly of a rapier loom transmission device according to an embodiment of the present invention;

[0020] Figure 5 A schematic diagram of a connecting plate of a rapier loom transmission device according to an embodiment of the present invention;

[0021] Figure 6 A schematic diagram of a weft yarn handover transmission mechanism of a rapier loom transmission device according to an embodiment of the present invention;

[0022] Figure 7 A schematic diagram of a cross shaft of a rapier loom transmission device according to an embodiment of the present invention;

[0023] Figure 8 A schematic diagram of a pressing block of a rapier loom transmission device according to an embodiment of the present invention;

[0024] Fig. 9 A schematic diagram of a positioning ruler of a synchronous positioning method for a rapier loom transmission device according to an embodiment of the present invention;

[0025] Fig.10 The figure is a schematic diagram of a positioning tool for a synchronous positioning method of a rapier loom transmission device according to an embodiment of the present invention.

[0026] The marks in the drawings are: 1, base; 2, axle; 3, pressure arm; 4, cam; 5, roller; 6, first support plate; 7, second support plate; 8, first through hole; 9, second through hole; 10, connecting plate; 11, convex block; 12, cylinder; 13, tilting block; 14, power shaft; 15, gear; 16, rotating arm; 17, cross shaft; 18, sector tooth; 19, first connecting arm; 20, second connecting arm; 21, first bearing; 22, second shaft bearing; 23, third bearing; 24, first connecting shaft; 25, second connecting shaft; 26, third connecting shaft; 27, fourth connecting shaft; 28, fourth bearing; 29, fifth bearing; 30, protrusion; 31, slide groove; 32, bearing seat; 33, connecting arm; 34, pressure block; 35, first inclined plane; 36, crossbeam; 37, positioning tool; 38, third screw; 39, fourth screw; 40, spring; 41, push rod; 42, weft insertion box; 43, positioning ruler. DETAILED DESCRIPTION

[0027] The present application is further described in detail below in conjunction with the accompanying drawings and embodiments.

[0028] like Figures 1 to 10As shown, this embodiment discloses a rapier loom transmission device, including a base 1, a cam box mechanism and a weft yarn handover transmission mechanism, wherein: the cam box mechanism includes a wheel shaft 2, a pressure arm 3, a cam 4, a roller 5, a first support assembly and a second support assembly, the number of the first support assemblies is two groups, the two groups of first support assemblies are symmetrically installed on one side of the base 1, and the second support assembly is installed on the other side of the base 1, the first support assembly is provided with a first through hole 8 for rotatably mounting the wheel shaft 2, the second support assembly is provided with a second through hole 9 for rotatably mounting the pressure arm 3, the cam 4 is coaxially fixedly connected to the wheel shaft 2, the roller 5 is coaxially fixedly connected to the pressure arm 3, and the base The seat 1 is provided with a third through hole for the roller 5 to pass through, and the third through hole is connected to the second through hole 9; the weft yarn handover transmission mechanism includes a power shaft 14, a gear 15, a rotating arm 16, a rocker arm, a cross shaft 17 and a fan-shaped tooth 18, one end of the power shaft 14 is coaxially fixedly connected to the wheel shaft 2 through a connecting piece, the other end of the power shaft 14 is coaxially fixedly connected to the gear 15, the rotating arm 16 is eccentrically installed on the end face of the gear 15, the rocker arm is rotatably connected to the rotating arm 16, and the rotation axis of the rocker arm does not coincide with the rotation axis of the rotating arm 16, the cross shaft 17 is rotatably connected to the rocker arm, and the fan-shaped tooth 18 is fixedly connected to one side of the cross shaft. The wheel shaft 2 rotates, and the pressing arm 3 is driven to swing back and forth to beat the weft through the cooperation of the cam 4 and the roller 5. The first support assembly supports the wheel shaft 2, and the second support assembly supports the pressure arm 3. The two groups of symmetrically arranged first support assemblies provide more balanced support for the wheel shaft 2, reduce the asymmetric force caused by the unilateral support, and thus reduce radial runout and eccentric load. The two groups of first support assemblies also help to disperse the load and enhance stability. The cam 4 rolls with the roller 5 located in the second through hole 9 through the third through hole, so that the transmission path between the cam 4 and the pressure arm 3 is more direct and the structure is more compact, which helps to improve the accuracy of the transmission. In addition, the wheel shaft 2 is coaxially fixedly connected with the power shaft 14 and the gear 15 in sequence. Through the design of the rocker arm and the cross shaft 17, the rotational motion of the power shaft 14 is converted into the precise reciprocating swing of the fan-shaped teeth 18, which simplifies the transmission structure of the original loom equipment, reduces the transmission components, reduces the weight of the entire structure, reduces the structural load, and reduces the reciprocating impact of the overall loom transmission structure, which is more conducive to the high-speed operation of the loom equipment.

[0029] like Figure 3As shown, the first support assembly includes a first support plate 6 and a second support plate 7, the first support plate 6 is provided with the first through hole 8, the second support plates 7 are symmetrically arranged on both sides of the first support plate 6, the second support plate 7 is fixedly connected to the base 1, and the second support plate 7 is a right-angled triangle structure, one right-angled side of the second support plate 7 is fixedly connected to the first support plate 6, and the other right-angled side of the second support plate 7 extends toward the base 1 away from the other group of first support assemblies. The symmetry and support rigidity of the wheel axle 2 are enhanced by the two first support plates 6. The triangular second support plate 7 has a more stable support structure.

[0030] like Figure 5 As shown, it also includes a connecting plate 10, one end of which is connected to the first support plate 6, and the other end of which is connected to the first support plate 6 of another group of first support assemblies, and the first support plate 6 is provided with a radially extending protrusion 11 on the side away from the base 1, and the connecting plate 10 and the protrusion 11 are connected by a first screw. The connecting plate 10 connects the two first support plates 6, further enhancing the stable support of the first support assembly to the wheel axle 2, and preventing the wheel axle 2 from radially jumping. The radially extending protrusion 11 prevents the connecting plate 10 from interfering with the cam 4 provided on the wheel axle 2.

[0031] In this embodiment, if Figure 4 As shown, the second support assembly includes a support cylinder 12 and tilting blocks 13 arranged on both sides of the support cylinder 12, the support cylinder 12 is provided with the second through hole 9, and the axial length of the support cylinder 12 is greater than or equal to the distance between the two first support plates 6. The support cylinder 12 covers the cam 4 and the roller 5 transmission.

[0032] like Figure 6 As shown, the rocker arm includes a first connecting arm 19 and a second connecting arm 20 connected to the first connecting arm 19 at an angle, the first connecting arm 19 is rotatably connected to the rotating arm 16 through a first bearing 21, the second connecting arm 20 includes a first connecting end and a second connecting end corresponding to the first connecting end, the cross shaft 17 is rotatably connected to the first connecting end through a second bearing 22, and the cross shaft 17 is rotatably connected to the second connecting end through a third bearing 23. The first connecting end, the second connecting end, and the first connecting arm 19 of the rocker arm form a Y-shaped structure. The rocker arm is integrally injection molded.

[0033] In this embodiment, if Figure 7As shown, the cross shaft 17 includes a first connecting shaft 24, a second connecting shaft 25, a third connecting shaft 26 and a fourth connecting shaft 27, the first connecting shaft 24 is coaxially connected to the second connecting shaft 25, the third connecting shaft 26 is coaxially connected to the fourth connecting shaft 27, the first connecting shaft 24 and the third connecting shaft 26 are set at an angle, the first connecting shaft 24 is rotatably connected to the first connecting end through the second bearing 22, the second connecting shaft 25 is rotatably connected to the second connecting end through the third bearing 23, the third connecting shaft 26 is rotatably mounted on the weft insertion box 42 through the fourth bearing 28, and the fourth connecting shaft 27 is rotatably mounted on the weft insertion box 42 through the fifth bearing 29. The first connecting shaft 24 is set at an angle to the third connecting shaft 26. The sector tooth 18 is connected to the first connecting shaft 24 and the second connecting shaft 25.

[0034] In this embodiment, if Figure 8 As shown, a protrusion 30 is provided on a side of the gear 15 facing the rotating arm, and the protrusion 30 is provided with a slide groove 31. The rotating arm 16 includes a bearing seat 32 and a connecting arm 33 integrally connected to the bearing seat 32. The first bearing 21 is arranged inside the bearing seat 32, and the bottom surface of the connecting arm 33 is slidably connected to the slide groove 31. The protrusion 30 is provided with a pressing block 34. The side wall of the connecting arm 33 is provided with a first inclined surface 35 along the length direction. The pressing block 34 is provided with a second inclined surface matching the first inclined surface 35. The second inclined surface is pressed on the upper surface of the second inclined surface, and the pressing block 34 is mounted on the protrusion 30 by a second screw. The diameter of the protrusion 30 is slightly smaller than the diameter of the gear 15. The outer ring of the first bearing 21 is interference fit with the bearing seat 32, and the inner ring of the first bearing 21 is interference fit with the first connecting arm 19. The position of the rotating arm 16 on the large gear 15 can be adjusted by the slide groove 31, and the reciprocating stroke of the sector tooth 18 can be changed. The closer the bearing seat 32 is to the axis of the gear 15, the shorter the reciprocating stroke of the sector tooth 18. The protrusion 30 can be integrally injection molded with the gear 15. The pressing block 34 and the protrusion 30 are both provided with a screw hole for the second screw to pass through. When the position of the rotating arm 16 needs to be adjusted, the second screw is loosened to separate the pressing block 34 from the protrusion 30, and the connecting arm 33 is moved to a suitable position along the slide groove 31, and the second inclined surface of the pressing block 34 is pressed again on the upper surface of the first inclined surface 35, and the second screw is tightened to fix the rotating arm 16 on the protrusion 30.

[0035] like Figure 1 As shown, the base 1 is provided with two groups of cam box mechanisms and two groups of weft yarn handover transmission mechanisms, the cam box mechanisms and the weft yarn handover transmission mechanisms are connected one by one, cross beams 36 are respectively provided at both ends of the base 1, the weft insertion box 42 is installed on the cross beam 36, and the wheel axle 2 is coaxially connected with the adjacent wheel axle 2 through a coupling.

[0036] like Figure 1 and 9As shown, the present embodiment also discloses a synchronous positioning method for a rapier loom transmission device, comprising the following steps: the base 1 is provided with two positioning fixtures 37 along the axial direction, the wheel axle 2 is provided with a positioning groove movably matched with the positioning fixture 37, and the two positioning grooves are arranged in a mirror image. During initial operation, the positioning fixture 37 is matched with the positioning groove one by one, the connecting piece between the power shaft 14 and the wheel axle 2 is loosened, and the gear 15 is fixed to the wall panel by a third screw 38. The distance between the fourth connecting shaft 27 of the cross shaft 17 and the gear 15 is measured by a positioning ruler 43. If the distance does not meet the standard, the third screw 38 is rotated to adjust the position of the gear 15 until the measured distance between the fourth connecting shaft 27 and the gear 15 meets the standard, and the third screw 38 is tightened to re-fix the connecting piece between the power shaft 14 and the wheel axle 2. The positioning groove cooperates with the positioning fixture 37, and the positioning fixture 37 positions the wheel axle 2 to ensure that the two cam box mechanisms are set synchronously. The connecting piece can be a clamp, and the clamp clamps the power shaft 14 and the wheel axle 2 through screws. During initial operation, the screws are loosened, and the distance between the fourth connecting shaft 27 of the cross shaft 17 and the gear 15 is adjusted. After adjustment, tighten the screws to make the clamp clamp the power shaft 14 and the wheel axle 2, and then remove the positioning fixture 37 and the third screw 38. At this time, the positioning and synchronization work of the weft beating mechanism and the weft insertion mechanism is completed, and the device can rotate normally.

[0037] like Fig.10 As shown, the positioning tool 37 includes a hollow fourth screw 39, a spring 40 and a push rod 41. The outer peripheral wall of the fourth screw 39 is provided with a thread that matches the base 1. One end of the spring 40 is arranged inside the fourth screw 39, and the other end of the spring 40 is connected to the push rod 41. The push rod 41 is movably matched with the positioning groove. The spring 40 can adjust the preload force of the push rod 41 and the groove. The fourth screw 39 is convenient for the staff to remove the positioning tool 37.

[0038] It is understandable that the specific embodiments described above are only used to explain the relevant inventions, rather than to limit the inventions. It should also be noted that, for ease of description, only the parts related to the invention are shown in the drawings. Multiple technical solutions in the same embodiment, as well as multiple technical solutions in different embodiments, can be arranged and combined to form new technical solutions without contradictions or conflicts. All equivalent structural transformations made using the contents of the specification and drawings of the present invention, directly or indirectly used in other related technical fields, are similarly included in the protection scope of the present invention.

Claims

1. A rapier loom transmission device, characterized in that: It includes a base, a cam box mechanism and a weft yarn transfer transmission mechanism, wherein: The cam box mechanism comprises a wheel shaft, a pressure arm, a cam, a roller, a first support assembly and a second support assembly. The first support assembly is provided in two groups, and the two groups of first support assemblies are symmetrically mounted on one side of the base, and the second support assembly is mounted on the other side of the base. The first support assembly is provided with a first through hole for rotatably mounting the wheel shaft, and the second support assembly is provided with a second through hole for rotatably mounting the pressure arm. The cam is coaxially fixedly connected to the wheel shaft, and the roller is coaxially fixedly connected to the pressure arm. The base is provided with a third through hole for the roller to pass through, and the third through hole is connected to the second through hole. The weft yarn handover transmission mechanism includes a power shaft, a gear, a rotating arm, a rocker arm, a cross shaft and fan-shaped teeth. One end of the power shaft is coaxially fixedly connected to the wheel axle through a connecting piece, and the other end of the power shaft is coaxially fixedly connected to the gear. The rotating arm is eccentrically installed on the end face of the gear. The rocker arm is rotatably connected to the rotating arm, and the rotation axis of the rocker arm does not coincide with the rotation axis of the rotating arm. The cross shaft is rotatably connected to the rocker arm, and the fan-shaped teeth are fixedly connected to the cross shaft.

2. The rapier loom transmission device according to claim 1, characterized in that: The first support assembly includes a first support plate and a second support plate, the first support plate is provided with the first through hole, the second support plates are symmetrically arranged on both sides of the first support plate, the second support plate is fixedly connected to the base, the second support plate is a right-angled triangle structure, one right-angled side of the second support plate is fixedly connected to the first support plate, and the other right-angled side of the second support plate extends toward the base away from the other group of first support assemblies.

3. The rapier loom transmission device according to claim 2, characterized in that: It also includes a connecting plate, one end of which is connected to the first support plate, and the other end of the connecting plate is connected to the first support plate of another group of first support assemblies. A radially extending protrusion is provided on the side of the first support plate facing away from the base, and the connecting plate and the protrusion are connected by a first screw.

4. The rapier loom transmission device according to claim 2, characterized in that: The second support assembly includes a support cylinder and tilting blocks arranged on both sides of the support cylinder. The support cylinder is provided with the second through hole, and the axial length of the support cylinder is greater than or equal to the distance between the two first support plates.

5. The rapier loom transmission device according to claim 1, characterized in that: The rocker arm includes a first connecting arm and a second connecting arm connected to the first connecting arm at an angle, the first connecting arm is rotatably connected to the rotating arm through a first bearing, the second connecting arm includes a first connecting end and a second connecting end arranged corresponding to the first connecting end, the cross shaft is rotatably connected to the first connecting end through a second bearing, and the cross shaft is rotatably connected to the second connecting end through a third bearing.

6. The rapier loom transmission device according to claim 5, characterized in that: The cross shaft includes a first connecting shaft, a second connecting shaft, a third connecting shaft and a fourth connecting shaft, the first connecting shaft is coaxially connected to the second connecting shaft, the third connecting shaft is coaxially connected to the fourth connecting shaft, the first connecting shaft and the third connecting shaft are arranged at an angle, the first connecting shaft is rotatably connected to the first connecting end through the second bearing, the second connecting shaft is rotatably connected to the second connecting end through the third bearing, the third connecting shaft is rotatably mounted on the weft insertion box through the fourth bearing, and the fourth connecting shaft is rotatably mounted on the weft insertion box through the fifth bearing.

7. The rapier loom transmission device according to claim 1, characterized in that: A protrusion is provided on the side of the gear facing the rotating arm, and the protrusion is provided with a slide groove. The rotating arm includes a bearing seat and a connecting arm integrally connected to the bearing seat, the first bearing is arranged inside the bearing seat, the bottom surface of the connecting arm is slidably connected to the slide groove, the protrusion is provided with a pressure block, and the side wall of the connecting arm is provided with a first inclined surface along the length direction, the pressure block is provided with a second inclined surface matching the first inclined surface, the second inclined surface is pressed on the upper surface of the second inclined surface, and the pressure block is mounted on the protrusion by a second screw.

8. The rapier loom transmission device according to claim 1, characterized in that: The base is provided with two groups of cam box mechanisms and two groups of weft yarn handover transmission mechanisms, the cam box mechanisms and the weft yarn handover transmission mechanisms are connected one by one, cross beams are respectively provided at both ends of the base, the weft insertion box is installed on the cross beam, and the wheel axle is coaxially connected with the adjacent wheel axle through a coupling.

9. A synchronous positioning method for a rapier loom transmission device, characterized in that: The method comprises the following steps: the base is provided with two positioning fixtures along the axial direction, the wheel axle is provided with a positioning groove which is movably matched with the positioning fixture, and the two positioning grooves are arranged in a mirror image; during initial operation, the positioning fixtures are matched with the positioning grooves one by one, the connecting piece between the power shaft and the wheel axle is loosened, the gear is fixed to the wall panel by a third screw, and the distance between the fourth connecting shaft of the cross shaft and the gear is measured by a positioning ruler. If the distance does not meet the standard, the third screw is rotated to adjust the position of the gear until the measured distance between the fourth connecting shaft and the gear meets the standard; the third screw is tightened to re-fix the connecting piece between the power shaft and the wheel axle.

10. The synchronous positioning method of the rapier loom transmission device according to claim 9, characterized in that: The positioning tool includes a hollow fourth screw, a spring and a push rod. The outer wall of the fourth screw is provided with a thread that cooperates with the base. One end of the spring is arranged inside the fourth screw, and the other end of the spring is connected to the push rod. The push rod is movably matched with the positioning groove.

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