Cam shedding machine and rapier loom

Abstract

The cam shedding machine is used for driving a heald frame to reciprocate in the vertical direction, the heald frame is configured to move between the highest point and the lowest point in the vertical direction, and the cam shedding machine comprises a cam shaft, a first cam piece, a second cam piece and a swing arm. The first cam piece and the second cam piece are both fixed to the cam shaft so as to rotate along with the cam shaft. The first cam pieces and the second cam pieces are matched with the corresponding swing arms to output swing and drive the heald frames to move in the vertical direction, the second cam pieces drive the corresponding swing arms to swing so as to drive the corresponding heald frames to move in the vertical direction, the N first cam pieces drive at least one corresponding heald frame to be located at the highest point, and the N second cam pieces drive at least one corresponding heald frame to be located at the highest point. When at least one heald frame is located at the lowest point, the second cam sheet drives the corresponding heald frame to be located at the lowest point; when the N first cam pieces drive the corresponding heald frames to be located at the heald leveling position, the second cam pieces drive the corresponding heald frames to be located at the highest point, and the weaving efficiency is effectively improved through the structure.

Description

Technical Field

[0001] The utility model relates to the technical field of loom, in particular to a cam shedding machine and a rapier loom. Background Art

[0002] The rapier loom is the mainstream machine in the loom. It has the advantages of high speed, stability and good variety adaptability, and is the preferred machine for weaving various grades of garment fabrics and other various grey fabrics. The rapier loom mainly drives the heddle frame to move up and down through a connecting rod assembly by a cam shedding machine, so that the warp yarns are divided into upper and lower layers of warp yarns to form an opening, facilitating the passage of the rapier head.

[0003] When simultaneously weaving multiple narrow-width medical bandages, in order to facilitate the operation of the warp yarns and the selvage yarns, the warp yarns and the selvage yarns are generally wound around the same warp beam at the same time. Since the consumption of the warp yarns and the selvage yarns is different (the consumption of the selvage yarns is more, and the consumption of the warp yarns is less), but the release amount is the same, the above situation makes the tensions of the warp yarns and the selvage yarns different (the tension of the warp yarns is small, and the tension of the selvage yarns is large). Therefore, the phenomenon of broken selvage yarns is likely to occur, which greatly affects the weaving efficiency.

[0004] Therefore, how to effectively improve the weaving efficiency is a technical problem that needs to be solved urgently by those skilled in the art. Summary of the Utility Model

[0005] In view of this, the purpose of the utility model is to provide a cam shedding machine, which can effectively improve the weaving efficiency.

[0006] Another purpose of the utility model is also to provide a rapier loom.

[0007] To achieve the above purpose, the utility model provides the following technical solutions:

[0008] A cam shedding machine for driving a heddle frame to reciprocate in the vertical direction. The heddle frame is configured to move between a highest point and a lowest point in the vertical direction, and includes a camshaft, a first cam plate, a second cam plate and a swing arm. The first cam plate and the second cam plate are both fixed on the camshaft to rotate following the camshaft.

[0009] The first cam plate, the second cam plate cooperate with the corresponding swing arm to output a swing, and drive the heddle frame to move in the vertical direction. The number of the first cam plates is N, N≥2. N first cam plates drive the corresponding swing arms to swing, so as to drive the corresponding heddle frames to move, and at a preset position, at least one heddle frame is located at the highest point, and at least one heddle frame is located at the lowest point.

[0010] The second cam plate drives the corresponding swing arm to swing, so as to drive the corresponding heddle frame to move in the vertical direction, and satisfy the following conditions:

[0011] When N first cam plates drive the corresponding at least one heddle frame to be at the highest point and at least one heddle frame to be at the lowest point, the second cam plate drives the corresponding heddle frame to be at the lowest point;

[0012] When N first cam plates drive the corresponding heddle frame to be at the beat-up position, the second cam plate drives the corresponding heddle frame to be at the highest point.

[0013] Optionally, the maximum cam pitch diameter of the first cam plate is greater than the maximum cam pitch diameter of the second cam plate.

[0014] Optionally, the number of times that one first cam plate rotates one week to drive the corresponding heddle frame to move up and down is A times;

[0015] The number of times that the second cam plate rotates one week to drive the corresponding heddle frame to move up and down is B times, and B = nA, where n ≥ 1.

[0016] Optionally, it further includes a guide wheel and the swing arm arranged corresponding to the guide wheel. The guide wheel is fixed on the camshaft and is arranged between the first cam plate and the second cam plate.

[0017] Optionally, it further includes a driving mechanism. The driving mechanism is connected to the camshaft, and the driving mechanism can drive the camshaft to rotate.

[0018] Optionally, the driving mechanism includes a driving motor and a transmission component. The driving motor is connected to the camshaft through the transmission component, and the driving motor can transmit power to the camshaft through the transmission component.

[0019] Optionally, the transmission component includes an input shaft, a first bevel gear, a second bevel gear and a transmission shaft. The first bevel gear is arranged on the input shaft, the second bevel gear is arranged on the transmission shaft, the first bevel gear meshes with the second bevel gear, and the transmission shaft is connected to the camshaft.

[0020] A rapier loom, characterized in that it includes the cam shedding mechanism described in any one of the above, and further includes a connecting rod assembly and a heddle frame. The cam shedding mechanism is connected to the heddle frame through the connecting rod assembly.

[0021] Optionally, the connecting rod assembly includes a blade connecting rod assembly, an inclined pull rod, a rocker arm assembly and a lifting pull rod assembly;

[0022] One end of the blade link assembly is connected to the swing arm, and the other end is connected to one end of the diagonal tie rod. One end of the rocker arm assembly is connected to the other end of the diagonal tie rod, and the other end is connected to one end of the lifting tie rod assembly. The other end of the lifting tie rod assembly is connected to the heddle frame.

[0023] Optionally, the rocker arm assembly includes a rotating shaft and a blade, and the blade is rotatably arranged on the rotating shaft.

[0024] There are at least two rocker arm assemblies and at least two lifting tie rod assemblies. At least one rocker arm assembly and one lifting tie rod assembly are arranged on one side of the heddle frame, and at least one rocker arm assembly and one lifting tie rod assembly are arranged on the opposite side of the heddle frame. The rocker arm assemblies are connected by a long connecting rod.

[0025] It can be seen from the above technical solutions that when the rapier loom is working, the camshaft rotates, and the camshaft drives the first cam plate and the second cam plate to rotate along its circumferential direction. During the rotation of the first cam plate and the second cam plate, the swing arms respectively corresponding to them are continuously pushed to move. Among them, when N first cam plates drive at least one heddle frame corresponding to them to be at the highest point and at least one heddle frame to be at the lowest point, the second cam plate drives the corresponding heddle frame to be at the lowest point. At this time, the second cam plate does not lift the yarn for the corresponding heddle frame, and the tension of the warp yarn is maintained within the preset tension range. When N first cam plates drive the corresponding heddle frames to be at the beat-up position, the second cam plate drives the corresponding heddle frames to be at the highest point. At this time, the second cam plate drives the corresponding heddle frames to lift the yarn to realize let-off, so as to leave a margin for the selvage yarn and reduce the probability of selvage yarn breakage, thereby effectively improving the weaving efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following briefly introduces the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are only the embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained according to the provided drawings without creative efforts.

[0027] Figure 1 Structural schematic diagram of the cam shedding machine disclosed in the embodiment of the present invention;

[0028] Figure 2 Connection structural schematic diagram of the cam shedding machine and the heddle frame disclosed in the embodiment of the present invention;

[0029] Figure 3 For Figure 2 Enlarged structural schematic diagram at A in

[0030] Figure 4 Structural schematic diagram of the first cam plate disclosed in the embodiment of the present utility model;

[0031] Figure 5 Structural schematic diagram of the second cam plate disclosed in the embodiment of the present utility model;

[0032] Figure 6 Structural schematic diagram of the guide wheel disclosed in the embodiment of the present utility model;

[0033] Figure 7 Internal structural schematic diagram of the cam opening machine (removing the guide wheel) disclosed in the embodiment of the present utility model;

[0034] Figure 8 Arrangement structural schematic diagram of the first cam plate and the second cam plate disclosed in the embodiment of the present utility model;

[0035] Figure 9 For Figure 8 Left view;

[0036] Figure 10 For Figure 8 Right view;

[0037] Figure 11 Internal structural schematic diagram of the cam opening machine disclosed in the embodiment of the present utility model;

[0038] Figure 12 Arrangement structural schematic diagram of the first cam plate, the second cam plate and the guide wheel disclosed in the embodiment of the present utility model;

[0039] Figure 13 For Figure 12 Left view;

[0040] Figure 14 For Figure 12 Right view;

[0041] Figure 15 Structural schematic diagram of the corresponding heddle frame driven by the second cam plate in the lowest point disclosed in the embodiment of the present utility model;

[0042] Figure 16 Structural schematic diagram of the corresponding heddle frame driven by the second cam plate in the highest point disclosed in the embodiment of the present utility model.

[0043] Reference numerals:

[0044] 100, driving mechanism; 101, input shaft; 102, first bevel gear; 103, second bevel gear; 104, transmission shaft; 200, camshaft; 300, first cam plate; 400, second cam plate; 500, swing arm; 600, guide wheel;

[0045] 700, connecting rod assembly; 701, connecting rod joint; 702, diagonal tie rod; 703, rocker arm assembly; 704, lifting rod assembly; 7041, threaded part of lifting rod; 7042, nut; 7043, stud

[0046] 800, heddle frame; 900, cloth roll; 1000, take-up shaft; 1100, back beam guide; 1200, warp beam; 1300, warp yarn; 1301, shed Detailed implementation mode

[0047] In view of this, the core of the present utility model lies in providing a cam shedding machine, which can effectively improve the weaving efficiency.

[0048] Another core of the present utility model also lies in providing a rapier loom.

[0049] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model. Please refer to Figures 1 to 16 .

[0050] Please refer to Figures 1 - 5 , Figures 7 - 10 , the cam shedding machine disclosed in the embodiments of the present utility model is used to drive the heddle frame 800 to reciprocate in the vertical direction. The heddle frame 800 is configured to move between the highest point and the lowest point in the vertical direction. Among them, the cam shedding machine includes a camshaft 200, a first cam plate 300, a second cam plate 400 and a swing arm 500. Both the first cam plate 300 and the second cam plate 400 are fixed on the camshaft 200 to rotate with the camshaft 200.

[0051] The first cam plate 300, the second cam plate 400 cooperate with the corresponding swing arms 500 to output swings, and drive the heddle frame 800 to move in the vertical direction. The number of the first cam plates 300 is N pieces, N≥2; the N first cam plates 300 drive the corresponding swing arms 500 to swing, so as to drive the corresponding heddle frames 800 to move, and at a preset position, at least one heddle frame 800 is located at the highest point, and at least one heddle frame 800 is located at the lowest point; the second cam plate 400 drives the corresponding swing arm 500 to swing, so as to drive the corresponding heddle frame 800 to move in the vertical direction, and satisfy the following conditions: when the N first cam plates 300 drive at least one of the corresponding heddle frames 800 to be at the highest point and at least one heddle frame 800 to be at the lowest point, the second cam plate 400 drives the corresponding heddle frame 800 to be at the lowest point; when the N first cam plates 300 drive the corresponding heddle frames 800 to be at the beat-up position, the second cam plate 400 drives the corresponding heddle frames 800 to be at the highest point.

[0052] When the rapier loom is working, the camshaft 200 rotates, and the camshaft 200 drives the first cam plate 300 and the second cam plate 400 to rotate along its circumferential direction. During the rotation of the first cam plate 300 and the second cam plate 400, they continuously push the swing arms 500 respectively arranged corresponding to them to act. Among them, when the N first cam plates 300 drive at least one of the corresponding heddle frames 800 to be at the highest point and at least one heddle frame 800 to be at the lowest point, the second cam plate 400 drives the corresponding heddle frame 800 to be at the lowest point. At this time, the second cam plate 400 does not lift the yarn of the corresponding heddle frame 800, and the tension of the warp yarn 1300 is maintained within the preset tension range; when the N first cam plates 300 drive the corresponding heddle frames 800 to be at the beat-up position, the second cam plate 400 drives the corresponding heddle frames 800 to be at the highest point. At this time, the second cam plate 400 drives the corresponding heddle frame 800 to lift the yarn, realizing let-off, so as to leave a margin for the selvage yarn and reduce the probability of the selvage yarn breaking, thereby effectively improving the weaving efficiency.

[0053] It should be noted that the cloth roll 900, the take-up shaft 1000, the back beam guide 1100 and the warp beam 1200 are all parts of the rapier loom. When the rapier loom is working, the warp yarn 1300 passes through the cloth roll 900, the take-up shaft 1000, the back beam guide 1100 in sequence and winds around the warp beam 1200.

[0054] For details, please refer to Figure 15 When the N first cam plates 300 drive at least one of the corresponding heddle frames 800 to be at the highest point and at least one heddle frame 800 to be at the lowest point, the second cam plate 400 drives the corresponding heddle frame 800 to be at the lowest point. At this time, the second cam plate 400 does not lift the yarn of the corresponding heddle frame 800, and the tension of the warp yarn 1300 is maintained within the preset tension range;

[0055] For details, please refer to Figure 16 When N first cam plates 300 drive the corresponding heald frames 800 to the heald level position, the second cam plate 400 drives the corresponding heald frame 800 to the highest point. At this time, the second cam plate 400 drives the corresponding heald frame 800 to lift the yarn, realizing warp feeding. At this time, a part of the warp yarn 1300 is released from the warp beam 1200, so as to leave a margin for the selvage yarn and reduce the probability of selvage yarn breakage.

[0056] It should be explained that for two adjacent heald frames 800, one heald frame 800 is at the highest point and one heald frame 800 is at the lowest point. At this time, the yarn is divided into upper and lower layers to form a shed 1301. In each shedding movement of the cam shedding machine, all the warp yarns 1300 start from the heald level position and are separated in two directions, up and down, to form the required shed 1301; when the shed is closed, all the upper and lower layer warp yarns 1300 have to return to the heald level position. The shed 1301 is also called the warp shed or shed.

[0057] As a further embodiment, the maximum cam radius of the first cam plate 300 disclosed in the embodiment of the present utility model is greater than the maximum cam radius of the second cam plate 400. With such a setting, the warp tension can be effectively controlled and excessive adjustment of the warp tension can be prevented.

[0058] As a further embodiment, for the cam shedding machine disclosed in the embodiment of the present utility model, the number of times that one first cam plate 300 rotates one week to drive the corresponding heald frame 800 to move up and down is A times, and the number of times that the second cam plate 400 rotates one week to drive the corresponding heald frame 800 to move up and down is B times, and B = nA, where n ≥ 1.

[0059] With such a setting, the movement frequency of the second cam plate 400 driving the corresponding heald frame 800 is greater than the movement frequency of the first cam plate 300 driving the corresponding heald frame 800, so that the yarn shakes and separates, avoiding adhesion.

[0060] Please refer to Figure 6 、 Figures 11 to 14 In order to realize the guiding function for the second cam plate 400, the cam shedding machine disclosed in the embodiment of the present utility model further includes a guide wheel 600 and a swing arm 500 arranged corresponding to the guide wheel 600. The guide wheel 600 is fixed on the cam shaft 200 and is arranged between the first cam plate 300 and the second cam plate 400.

[0061] The embodiment of the present utility model does not limit the specific structure of the guide wheel 600, and any structure that meets the use requirements of the present utility model is within the protection scope of the present utility model.

[0062] As one of the embodiments, the guide wheel 600 disclosed in the embodiments of the present invention can be an annular cam. When the camshaft 200 drives the guide wheel 600 to rotate, the guide wheel 600 is always in contact with the corresponding swing arm 500. Therefore, the heddle frame 800 always remains stationary.

[0063] The embodiments of the present invention do not limit the specific structure of the driving mechanism 100, and any structure that meets the usage requirements of the present invention is within the protection scope of the present invention.

[0064] As one of the embodiments, the driving mechanism 100 disclosed in the embodiments of the present invention includes a driving motor and a transmission component. Among them, the driving motor is connected to the camshaft 200 through the transmission component, and the driving motor can transmit power to the camshaft 200 through the transmission component.

[0065] The embodiments of the present invention do not limit the specific structure of the transmission component, and any structure that meets the usage requirements of the present invention is within the protection scope of the present invention.

[0066] As one of the embodiments, the transmission component disclosed in the embodiments of the present invention includes an input shaft 101, a first bevel gear 102, a second bevel gear 103, and a transmission shaft 104. The first bevel gear 102 is arranged on the input shaft 101, the second bevel gear 103 is arranged on the transmission shaft 104, the first bevel gear 102 meshes with the second bevel gear 103, and the transmission shaft 104 is connected to the camshaft 200.

[0067] Start the motor. The motor drives the input shaft 101 to rotate. The input shaft 101 drives the first bevel gear 102 to rotate. The first bevel gear 102 drives the second bevel gear 103 to rotate. The second bevel gear 103 drives the transmission shaft 104 to rotate. The transmission shaft 104 drives the camshaft 200 to rotate. The camshaft 200 drives the first cam plate 300, the second cam plate 400, and the guide wheel 600 to rotate.

[0068] The embodiments of the present invention also disclose a rapier loom, which includes the cam shedding machine disclosed in any of the above embodiments, and further includes a connecting rod assembly 700 and a heddle frame 800. The cam shedding machine is connected to the heddle frame 800 through the connecting rod assembly 700.

[0069] Since this rapier loom adopts the cam shedding machine disclosed in the embodiments of the present invention, this rapier loom has the technical advantages of the cam shedding machine disclosed in the embodiments of the present invention, and the embodiments of the present invention will not elaborate on them one by one.

[0070] The embodiments of the present invention do not limit the specific structure of the connecting rod assembly 700, and any structure that meets the usage requirements of the present invention is within the protection scope of the present invention.

[0071] As one of the embodiments, please refer to Figures 1 to 3 , the connecting rod assembly 700 disclosed in the embodiment of the present utility model includes a blade connecting rod coupling 701, an inclined tie rod 702, a rocker arm assembly 703, and a lifting tie rod assembly 704.

[0072] Wherein, one end of the blade connecting rod coupling 701 is connected to the swing arm 500, the other end is connected to one end of the inclined tie rod 702, one end of the rocker arm assembly 703 is connected to the other end of the inclined tie rod 702, the other end is connected to one end of the lifting tie rod assembly 704, and the other end of the lifting tie rod assembly 704 is connected to the heddle frame 800.

[0073] It should be noted that the lifting tie rod assembly 704 includes a lifting tie rod threaded portion 7041, a nut 7042, and a stud 7043. The height of the heddle frame 800 on the lifting tie rod 704 is adjusted by adjusting the height position of the stud 7043 on the lifting tie rod threaded portion 7041, and is fixed by the nut 7042 after adjustment.

[0074] In order to improve the smoothness of the movement of the heddle frame 800, the rocker arm assembly 703 disclosed in the embodiment of the present utility model includes a rotating shaft and a blade, and the blade is rotatably arranged on the rotating shaft.

[0075] Wherein, both the rocker arm assembly 703 and the lifting tie rod assembly 704 are at least two. At least one rocker arm assembly 703 and one lifting tie rod assembly 704 are arranged on one side of the heddle frame 800, and at least one rocker arm assembly 703 and one lifting tie rod assembly 704 are arranged on the opposite side of the heddle frame 800. Different rocker arm assemblies 703 are connected by a long connecting rod.

[0076] When the first cam plate 300 pushes the swing arm 500 to move, the swing arm 500 drives the blade connecting rod coupling 701 to move, the swing arm 500 drives the blade connecting rod coupling 701 to drive the rocker arm assembly 703 to move, the rocker arm assembly 703 drives the lifting tie rod assembly 704 to move, and the lifting tie rod drives the heddle frame 800 to move in the vertical direction.

[0077] Finally, it should also be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the term "comprising" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article, or device including a series of elements includes not only those elements, but also other elements not expressly listed, or elements inherent to such process, method, article, or device.

[0078] In the present specification, the various embodiments are described in a progressive manner. Each embodiment focuses on the differences from other embodiments, and the same or similar parts among the various embodiments can be referred to each other.

[0079] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A cam shedding machine, used for driving a heald frame to reciprocate in a vertical direction, wherein the heald frame is configured to move between a highest point and a lowest point in the vertical direction, characterized in that: The invention comprises a camshaft, a first cam piece, a second cam piece and a swing arm, wherein the first cam piece and the second cam piece are both fixed on the camshaft to rotate with the camshaft; The first cam piece and the second cam piece cooperate with the corresponding swing arm to output swing and drive the heald frame to move in the vertical direction; the number of the first cam pieces is N, N ≥ 2; the N first cam pieces drive the corresponding swing arm to swing, so as to drive the corresponding heald frame to move, and at least one heald frame is located at the highest point and at least one heald frame is located at the lowest point at a preset position; The second cam piece drives the corresponding swing arm to swing, so as to drive the corresponding heald frame to move in the vertical direction, and the following conditions are met: When at least one of the heald frames driven by the first cam pieces is at the highest point and at least one of the heald frames is at the lowest point, the heald frames driven by the second cam pieces are at the lowest point; When the heald frame corresponding to the N-piece first cam piece driving is at the heald flat position, the heald frame corresponding to the N-piece first cam piece driving is at the highest point.

2. The cam opening machine according to claim 1, characterized in that: The maximum cam diameter of the first cam piece is greater than the maximum cam diameter of the second cam piece.

3. The cam opening machine according to claim 1, characterized in that: The number of times that one of the first cam pieces drives the corresponding heald frame to move up and down is A times; The second cam piece rotates one circle to drive the corresponding heald frame to move up and down B times, and B=nA, n≥1.

4. The cam opening machine according to claim 1, characterized in that: It also includes a guide wheel and the swing arm arranged corresponding to the guide wheel. The guide wheel is fixed on the camshaft and is arranged between the first cam piece and the second cam piece.

5. The cam opening machine according to claim 1, characterized in that: It also includes a driving mechanism, which is connected to the camshaft and can drive the camshaft to rotate.

6. The cam opening machine according to claim 5, characterized in that: The driving mechanism includes a driving motor and a transmission assembly. The driving motor is connected to the camshaft through the transmission assembly. The driving motor can transmit power to the camshaft through the transmission assembly.

7. The cam opening machine according to claim 6, characterized in that: The transmission assembly includes an input shaft, a first bevel gear, a second bevel gear and a transmission shaft, the first bevel gear is arranged on the input shaft, the second bevel gear is arranged on the transmission shaft, the first bevel gear is meshed with the second bevel gear, and the transmission shaft is connected to the camshaft.

8. A rapier loom, characterized in that: It comprises a cam opening machine as described in any one of claims 1 to 7, and also comprises a connecting rod assembly and a heald frame, wherein the cam opening machine is connected to the heald frame via the connecting rod assembly.

9. The rapier loom according to claim 8, characterized in that: The connecting rod assembly includes a blade connecting rod combination, a diagonal tie rod, a rocker arm assembly and a lifting rod assembly; One end of the blade connecting rod combination is connected to the swing arm, and the other end is connected to one end of the inclined rod. One end of the rocker arm assembly is connected to the other end of the inclined rod, and the other end is connected to one end of the lifting rod assembly. The other end of the lifting rod assembly is connected to the heald frame.

10. The rapier loom according to claim 9, characterized in that: The rocker arm assembly includes a rotating shaft and a blade, and the blade is rotatably arranged on the rotating shaft; There are at least two of the rocker arm assemblies and the lifting rod assemblies, at least one of the rocker arm assembly and the lifting rod assembly is arranged on one side of the heald frame, at least one of the rocker arm assembly and the lifting rod assembly is arranged on the opposite side of the heald frame, and the rocker arm assemblies are connected by a long connecting rod.

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