Cam shedding machine, rapier loom and shedding control method

Abstract

The invention discloses a cam shedding machine, a rapier loom and a shedding control method.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 heald frame 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 invention relates to the technical field of looms, and in particular to a cam shedding loom, a rapier loom and a shedding control method. Background Art

[0002] Rapier loom is the mainstream machine among looms. It has the advantages of high speed, stability and good variety adaptability. It is the first choice for weaving various grades of clothing fabrics and other various grey fabrics. Rapier loom is mainly a cam shedding machine that drives the heald frame up and down through the connecting rod assembly, so that the warp yarn is divided into upper and lower layers of warp yarn, forming an opening to facilitate the rapier head to pass through.

[0003] When weaving multiple narrow medical bandages at the same time, in order to facilitate the operation of warp yarn and selvedge yarn, the warp yarn and selvedge yarn are generally wound on the same warp beam at the same time. Since the amount of warp yarn and selvedge yarn is different (the selvedge yarn is used more and the warp yarn is used less), but the release amount is the same, the above situation makes the tension of the warp yarn and the selvedge yarn different (the warp yarn tension is small and the selvedge yarn tension is large), it is easy to cause the selvedge yarn to break, which greatly affects the weaving efficiency.

[0004] Therefore, how to effectively improve weaving efficiency is a technical problem that those skilled in the art need to solve urgently. Summary of the invention

[0005] In view of this, an object of the present invention is to provide a cam shedding machine that can effectively improve weaving efficiency.

[0006] Another object of the present invention is to provide a rapier loom.

[0007] Another object of the present invention is to provide an opening control method.

[0008] To achieve the above object, the present invention provides the following technical solutions:

[0009] A cam shedding machine, used for driving a heald frame to reciprocate in a vertical direction, the heald frame being configured to move between a highest point and a lowest point in the vertical direction, comprising a cam shaft, a first cam piece, a second cam piece and a swing arm, the first cam piece and the second cam piece being both fixed on the cam shaft to rotate with the cam shaft;

[0010] 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;

[0011] 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:

[0012] 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;

[0013] 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.

[0014] Optionally, the maximum cam diameter of the first cam piece is greater than the maximum cam diameter of the second cam piece.

[0015] Optionally, one of the first cam pieces rotates one circle and drives the corresponding heald frame to move up and down A times;

[0016] 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.

[0017] Optionally, 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 arranged between the first cam piece and the second cam piece.

[0018] Optionally, a driving mechanism is further included, wherein the driving mechanism is connected to the camshaft and can drive the camshaft to rotate.

[0019] Optionally, the driving mechanism includes a driving motor and a transmission assembly, the driving motor is connected to the camshaft via the transmission assembly, and the driving motor can transmit power to the camshaft via the transmission assembly.

[0020] Optionally, 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.

[0021] A rapier loom, characterized in that it comprises the cam shedding machine described in any one of the above, and also comprises a connecting rod assembly and a heald frame, wherein the cam shedding machine is connected to the heald frame through the connecting rod assembly.

[0022] Optionally, the connecting rod assembly includes a blade connecting rod combination, a diagonal tie rod, a rocker arm assembly and a lifting rod assembly;

[0023] 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.

[0024] Optionally, the rocker arm assembly includes a rotating shaft and a blade, and the blade is rotatably arranged on the rotating shaft;

[0025] 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.

[0026] An opening control method, comprising:

[0027] Adjust the positions of the first cam piece and the second cam piece on the camshaft;

[0028] The camshaft is driven to rotate, and the camshaft drives the first cam piece and the second cam piece to rotate, and 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;

[0029] The number of the first cam pieces is N, where N is greater than or equal to 2; the N first cam pieces drive the corresponding swing arms to swing, so as to drive the corresponding heald frames 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;

[0030] 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:

[0031] 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;

[0032] 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.

[0033] It can be seen from the above technical scheme that when the rapier loom is working, the camshaft rotates, and the camshaft drives the first cam piece and the second cam piece to rotate along its circumferential direction. During the rotation of the first cam piece and the second cam piece, the swing arm action corresponding to them is continuously pushed. Among them, when the N-piece first cam pieces drive at least one corresponding heald frame to be at the highest point, and at least one heald frame is at the lowest point, the second cam piece drives the corresponding heald frame to be at the lowest point. At this time, the second cam piece drives the corresponding heald frame not to lift the yarn, and the tension of the warp yarn is maintained within the preset tension range; when the N-piece first cam pieces drive the corresponding heald frame to be in the heald flat position, the second cam piece drives the corresponding heald frame to be at the highest point. At this time, the second cam piece drives the corresponding heald frame to lift the yarn to realize warp feeding, thereby leaving a margin for the twisted edge yarn, reducing the probability of twisted edge yarn breaking, thereby effectively improving weaving efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0035] Figure 1 It is a structural schematic diagram of a cam opening machine disclosed in an embodiment of the present invention;

[0036] Figure 2 It is a schematic diagram of the connection structure between the cam shedding machine and the heald frame disclosed in the embodiment of the present invention;

[0037] Figure 3 for Figure 2 A schematic diagram of the enlarged structure at A in the middle;

[0038] Figure 4 It is a structural schematic diagram of a first cam piece disclosed in an embodiment of the present invention;

[0039] Figure 5 It is a structural schematic diagram of the second cam piece disclosed in an embodiment of the present invention;

[0040] Figure 6 It is a schematic diagram of the structure of the guide wheel disclosed in the embodiment of the present invention;

[0041] Figure 7 A schematic diagram of the internal structure of the cam opening machine (without the guide wheel) disclosed in an embodiment of the present invention;

[0042] Figure 8 A schematic diagram of the arrangement structure of the first cam piece and the second cam piece disclosed in an embodiment of the present invention;

[0043] Fig. 9 for Figure 8 Left view of

[0044] Fig.10 for Figure 8 Right view of;

[0045] Fig.11 A schematic diagram of the internal structure of a cam opening machine disclosed in an embodiment of the present invention;

[0046] Fig.12 A schematic diagram of the arrangement structure of the first cam piece, the second cam piece and the guide wheel disclosed in an embodiment of the present invention;

[0047] Fig.13 for Fig.12 Left view of

[0048] Fig.14 for Fig.12 Right view of;

[0049] Fig.15 This is a schematic structural diagram of a heald frame driven by a second cam piece according to an embodiment of the present invention and corresponding to the heald frame being at the lowest point;

[0050] Fig.16 This is a schematic structural diagram of a heald frame driven by a second cam piece according to an embodiment of the present invention and corresponding to the heald frame being at the highest point.

[0051] Reference numerals:

[0052] 100, driving mechanism; 101, input shaft; 102, first bevel gear; 103, second bevel gear; 104, transmission shaft; 200, camshaft; 300, first cam piece; 400, second cam piece; 500, swing arm; 600, guide wheel; 700, connecting rod assembly; 701, connecting rod combination; 702, inclined pull rod; 703, rocker arm assembly; 704, lifting rod assembly; 7041, lifting rod threaded portion; 7042, nut; 7043, stud; 800, heald frame; 900, cloth roll; 1000, winding shaft; 1100, rear beam guide; 1200, warp beam; 1300, warp yarn; 1301, shed. DETAILED DESCRIPTION

[0053] In view of this, the core of the present invention is to provide a cam shedding machine that can effectively improve weaving efficiency.

[0054] Another core of the present invention is to provide a rapier loom.

[0055] Another core of the present invention is to provide an opening control method.

[0056] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. Please refer to Figures 1 to 16 .

[0057] Please refer to Figure 1-Figure 5 , Figure 7-10 The cam opening machine disclosed in the embodiment of the present invention is used to drive the heald frame 800 to reciprocate in the vertical direction, and the heald frame 800 is configured to move between the highest point and the lowest point in the vertical direction, wherein the cam opening machine includes a camshaft 200, a first cam piece 300, a second cam piece 400 and a swing arm 500, and the first cam piece 300 and the second cam piece 400 are both fixed on the camshaft 200 to rotate with the camshaft 200.

[0058] The first cam piece 300 and the second cam piece 400 cooperate with the corresponding swing arm 500 to output swing and drive the heald frame 800 to move in the vertical direction. The number of the first cam pieces 300 is N, and N≥2; the N first cam pieces 300 drive the corresponding swing arm 500 to swing, so as to drive the corresponding heald frame 800 to move, and make at least one heald frame 800 at the highest point and at least one heald frame 800 at the lowest point at the preset position; the second cam piece 400 drives the corresponding swing arm 500 to swing, so as to drive the corresponding heald frame 800 to move in the vertical direction, and satisfies the following conditions: when the N first cam pieces 300 drive the corresponding at least one heald frame 800 to be at the highest point and at least one heald frame 800 to be at the lowest point, the second cam piece 400 drives the corresponding heald frame 800 to be at the lowest point; when the N first cam pieces 300 drive the corresponding heald frame 800 to be at the heald flat position, the second cam piece 400 drives the corresponding heald frame 800 to be at the highest point.

[0059] When the rapier loom is working, the cam shaft 200 rotates, and the cam shaft 200 drives the first cam piece 300 and the second cam piece 400 to rotate along its circumferential direction. During the rotation of the first cam piece 300 and the second cam piece 400, the swing arms 500 respectively arranged therefor are continuously pushed to move, wherein, when the N-piece first cam piece 300 drives at least one corresponding heald frame 800 to be at the highest point, and at least one heald frame 800 is at the lowest point, the second cam piece 400 drives the corresponding heald frame 800 to be at the lowest point. At this time, the second cam piece 400 drives the corresponding heald frame 800 not to lift the yarn, and the tension of the warp yarn 1300 is maintained within the preset tension range; when the N-piece first cam piece 300 drives the corresponding heald frame 800 to be at the heald flat position, the second cam piece 400 drives the corresponding heald frame 800 to be at the highest point. At this time, the second cam piece 400 drives the corresponding heald frame 800 to lift the yarn to realize warp feeding, thereby leaving a margin for the twisted edge yarn, reducing the probability of the twisted edge yarn breaking, thereby effectively improving the weaving efficiency.

[0060] It should be noted that the cloth roll 900, the winding shaft 1000, the rear beam guide 1100 and the warp beam 1200 are all part of the rapier loom. When the rapier loom is working, the warp yarn 1300 is wound around the warp beam 1200 through the cloth roll 900, the winding shaft 1000 and the rear beam guide 1100 in sequence.

[0061] Please refer to Fig.15 , when the N-piece first cam piece 300 drives at least one corresponding heald frame 800 to be at the highest point, and at least one heald frame 800 is at the lowest point, the second cam piece 400 drives the corresponding heald frame 800 to be at the lowest point, at this time, the second cam piece 400 drives the corresponding heald frame 800 not to lift the yarn, and the tension of the warp yarn 1300 is maintained within the preset tension range;

[0062] Please refer to Fig.16 When the N-piece first cam piece 300 drives the corresponding heald frame 800 to be in the heald flat position, the second cam piece 400 drives the corresponding heald frame 800 to be at the highest point. At this time, the second cam piece 400 drives the corresponding heald frame 800 to lift the yarn to realize warp feeding. At this time, a part of the warp yarn 1300 is released from the warp shaft 1200, thereby leaving a margin for the twisted edge yarn and reducing the probability of the twisted edge yarn breaking.

[0063] It should be explained that, of the two adjacent heald frames 800, one heald frame 800 is located at the highest point and the other heald frame 800 is located at the lowest point. At this time, the yarn is divided into two layers, upper and lower, to form a shed 1301. In each opening movement of the cam shedding machine, all the warp yarns 1300 start from the heald flat position and separate in the upper and lower directions to form the required shed 1301; when the shed is closed, all the upper and lower layers of the warp yarns 1300 must return to the heald flat position. The shed 1301 is also called a warp yarn opening, or an opening.

[0064] As a further embodiment, the maximum cam diameter of the first cam piece 300 disclosed in the embodiment of the present invention is greater than the maximum cam diameter of the second cam piece 400. Such an arrangement can effectively control the tension of the warp yarn and prevent excessive adjustment of the warp yarn tension.

[0065] As a further embodiment, in the cam opening machine disclosed in the embodiment of the present invention, a first cam piece 300 rotates one circle to drive the corresponding heald frame 800 to move up and down a number of A times, and a second cam piece 400 rotates one circle to drive the corresponding heald frame 800 to move up and down a number of B times, and B=nA, n≥1.

[0066] With such arrangement, the movement frequency of the corresponding heald frame 800 driven by the second cam piece 400 is greater than the movement frequency of the corresponding heald frame 800 driven by the first cam piece 300, thereby causing the yarn to shake and separate to avoid adhesion.

[0067] Please refer to Figure 6 , Figures 11 to 14 In order to realize the guiding effect on the second cam piece 400, the cam opening machine disclosed in the embodiment of the present invention also 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 camshaft 200 and is arranged between the first cam piece 300 and the second cam piece 400.

[0068] The embodiment of the present invention does not limit the specific structure of the guide wheel 600. As long as the structure meets the use requirements of the present invention, it is within the protection scope of the present invention.

[0069] As one embodiment, the guide wheel 600 disclosed in the embodiment of the present invention may be a ring-shaped 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, so the heald frame 800 is always in a stationary state.

[0070] The embodiment of the present invention does not limit the specific structure of the driving mechanism 100. As long as the structure meets the use requirements of the present invention, it is within the protection scope of the present invention.

[0071] As one embodiment, the driving mechanism 100 disclosed in the embodiment of the present invention includes a driving motor and a transmission assembly, wherein the driving motor is connected to the camshaft 200 through the transmission assembly, and the driving motor can transmit power to the camshaft 200 through the transmission assembly.

[0072] The embodiments of the present invention do not limit the specific structure of the transmission assembly. As long as the structure meets the use requirements of the present invention, it is within the protection scope of the present invention.

[0073] As one of the embodiments, the transmission assembly disclosed in the embodiment 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 is meshed with the second bevel gear 103, and the transmission shaft 104 is connected to the camshaft 200.

[0074] 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 piece 300, the second cam piece 400 and the guide wheel 600 to rotate.

[0075] The embodiment of the present invention further discloses a rapier loom, comprising a cam shedding machine as disclosed in any of the above embodiments, and further comprising a connecting rod assembly 700 and a heald frame 800, wherein the cam shedding machine is connected to the heald frame 800 via the connecting rod assembly 700.

[0076] Since the rapier loom adopts the cam shedding machine disclosed in the embodiment of the present invention, the rapier loom has the technical advantages of the cam shedding machine disclosed in the embodiment of the present invention, and the embodiment of the present invention will not describe them one by one.

[0077] The embodiment of the present invention does not limit the specific structure of the connecting rod assembly 700. As long as the structure meets the use requirements of the present invention, it is within the protection scope of the present invention.

[0078] As one example, please refer to Figures 1 to 3 The connecting rod assembly 700 disclosed in the embodiment of the present invention includes a blade connecting rod combination 701, a diagonal rod 702, a rocker arm assembly 703 and a lifting rod assembly 704.

[0079] Among them, one end of the blade connecting rod combination 701 is connected to the swing arm 500, and the other end is connected to one end of the inclined rod 702. One end of the rocker arm assembly 703 is connected to the other end of the inclined rod 702, and the other end is connected to one end of the lifting rod assembly 704. The other end of the lifting rod assembly 704 is connected to the heald frame 800.

[0080] It should be noted that the lifting rod assembly 704 includes a lifting rod threaded portion 7041, a nut 7042 and a stud 7043, wherein the height of the heald frame 800 on the lifting rod 704 is achieved by adjusting the height position of the stud 7043 on the lifting rod threaded portion 7041, and is fixed by the nut 7042 after adjustment.

[0081] In order to improve the stability of the movement of the heald frame 800, the rocker arm assembly 703 disclosed in the embodiment of the present invention includes a rotating shaft and a blade, and the blade is rotatably arranged on the rotating shaft.

[0082] Among them, there are at least two rocker arm assemblies 703 and lifting rod assemblies 704, at least one rocker arm assembly 703 and one lifting rod assembly 704 are arranged on one side of the heald frame 800, at least one rocker arm assembly 703 and one lifting rod assembly 704 are arranged on the opposite side of the heald frame 800, and different rocker arm assemblies 703 are connected by long connecting rods.

[0083] When the first cam piece 300 pushes the swing arm 500 to move, the swing arm 500 drives the blade connecting rod combination 701 to move, the swing arm 500 drives the blade connecting rod combination 701 to drive the swing arm assembly 703 to move, the swing arm assembly 703 drives the lifting rod assembly 704 to move, and the lifting rod drives the heald frame 800 to move in the vertical direction.

[0084] The embodiment of the present invention also discloses a cam opening control method, which adjusts the positions of the first cam piece 300 and the second cam piece 400 on the camshaft 200;

[0085] The driving camshaft 200 rotates, and the camshaft 200 drives the first cam piece 300 and the second cam piece 400 to rotate. The first cam piece 300 and the second cam piece 400 cooperate with the corresponding swing arm 500 to output swing, and drive the heald frame 800 to move in the vertical direction.

[0086] Among them, the number of first cam pieces 300 is N, N ≥ 2; the N first cam pieces 300 drive the corresponding swing arms 500 to swing, so as to drive the corresponding heald frames 800 to move, and at least one heald frame 800 is located at the highest point and at least one heald frame 800 is located at the lowest point at a preset position; the second cam piece 400 drives the corresponding swing arm 500 to swing, so as to drive the corresponding heald frame 800 to move in a vertical direction, and satisfies the following conditions: when the N first cam pieces 300 drive the corresponding at least one heald frame 800 to be at the highest point, and at least one heald frame 800 is at the lowest point, the second cam piece 400 drives the corresponding heald frame 800 to be at the lowest point; when the N first cam pieces 300 drive the corresponding heald frame 800 to be at the heald flat position, the second cam piece 400 drives the corresponding heald frame 800 to be at the highest point.

[0087] When the rapier loom is working, first adjust the positions of the first cam piece 300 and the second cam piece 400 on the cam shaft 200, and then drive the cam shaft 200 to rotate, and the cam shaft 200 drives the first cam piece 300 and the second cam piece 400 to rotate along its circumferential direction. During the rotation of the first cam piece 300 and the second cam piece 400, the swing arms 500 respectively arranged therewith are continuously pushed to move, wherein, when the N first cam pieces 300 drive at least one corresponding heald frame 800 to be at the highest point, and at least one heald frame 800 is at the lowest point, the first The second cam piece 400 drives the corresponding heald frame 800 to be at the lowest point. At this time, the second cam piece 400 drives the corresponding heald frame 800 not to lift the yarn, and the tension of the warp yarn 1300 is maintained within the preset tension range; when the N-piece first cam piece 300 drives the corresponding heald frame 800 to be in the heald flat position, the second cam piece 400 drives the corresponding heald frame 800 to be at the highest point. At this time, the second cam piece 400 drives the corresponding heald frame 800 to lift the yarn to realize warp feeding, thereby leaving a margin for the twisted edge yarn, reducing the probability of twisted edge yarn breaking, thereby effectively improving weaving efficiency.

[0088] Finally, it should be noted that, in this article, relational terms such as first and second, etc. 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 "comprises" or any other variation thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device that includes a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0089] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0090] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may 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 rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A cam shedding machine, used to drive 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, It is 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, It is 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, It is 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, It is 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, It is 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, It is 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, It is 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, It is 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, It is 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, It is 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.

11. An opening control method, It is characterized in that include: Adjust the positions of the first cam piece and the second cam piece on the camshaft; The camshaft is driven to rotate, and the camshaft drives the first cam piece and the second cam piece to rotate, and 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, where N is greater than or equal to 2; the N first cam pieces drive the corresponding swing arms to swing, so as to drive the corresponding heald frames 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.

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