Single-rod common-weft cam power box and high-speed rapier loom

Abstract

The utility model relates to a single-pole common-weft cam power box and a high-speed rapier loom, a heald raising power group is arranged in a box body, the heald raising power group comprises a heald raising input shaft and a mounting shaft, the two ends of the heald raising input shaft are rotatably connected on the box body through bearings, the two ends of the mounting shaft are fixed with the box body, and the mounting shaft is fixed on the box body. Two heald-raising and weft-sharing cam groups are fixed on the heald-raising input shaft, each heald-raising and weft-sharing cam group comprises a cam I and a cam II, two heald-raising swing arms in one-to-one correspondence with the heald-raising and weft-sharing cam groups are connected onto the mounting shaft through bearings, and a roller I matched with the cam I and a roller II matched with the cam II are arranged on the heald-raising swing arms; the upper end of the heald raising swing arm is connected with a heald raising rod, and the heald raising rod is used for being connected with a heald frame; the rapier loom has the advantages that the mode that the single-side heald raising swing arm is matched with the common-weft cam is adopted, the heald raising swing arm can swing back and forth for three times when the heald raising swing arm rotates by one circle through the design of the cam, compared with an existing rapier loom, power can be improved by three times, and production efficiency is greatly improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of textile machinery especially, relate to a single lever common weft cam power box and high -speed rapier loom. BACKGROUND

[0002] As Figure 1 And 2 The technical scheme (patent number: 201911098547.9) of the prior application of the applicant, the technical scheme discloses a kind of braiding machine that can realize braiding, including front and back two pieces of harness frame, opening power group for driving front harness frame left and right movement and harness power group for driving the up and down movement of two pieces of harness frame.Gear transmission and speed change structure are included in the above-mentioned scheme in the harness power group, for the power of loom total drive motor is speed changed and is transmitted to the swing mechanism in the harness power group, swing mechanism swings front and back, for driving two harness rods to do reciprocating rotary swing within a certain amplitude, then realize the up and down movement by adapter piece driving front and back two pieces of harness frame;But in the above-mentioned scheme, swing mechanism and harness rod are arranged in the same plane, so that the overall land area of harness power group is larger, it is not conducive to being made into a whole with loom frame, and simultaneously, in the above-mentioned scheme, the translation movement of output rod in swing mechanism is converted into reciprocating rotation of harness rod, and then the rotation is changed into up and down movement by adapter piece, so that the output of driving force is not direct enough;2.The power transmission structure of loom total drive motor and opening power group, harness power group is complex, installation time-consuming, maintenance frequency is high and cost is big.

[0003] To solve the above-mentioned defects, the applicant then proposes a new high-speed rapier loom, as Figure 3 And Figure 4 It can also be seen from patent CN202311229695.6.The patent adopts swing mechanism that swings up and down, and through L-shaped connecting piece, the power output from swing mechanism can directly drive the up and down movement of harness frame, reduces the loss of force in conversion process, improves transmission efficiency, and the power of opening power group and harness power group is transmitted by the same bidirectional transmission shaft, so that the power transmission structure between loom total drive and opening power group is saved, the integration of opening power group and harness power group is improved, and the power transmission structure between loom total drive and opening power group, harness power group is simplified.

[0004] But in actual production, the applicant found the following defects:

[0005] 1.Because of the harness power group in the above-mentioned scheme, a set of harness common weft cam group needs to be arranged on both sides (such as Figure 4 Upper and lower sides or such as Figure 2The two sides of the two sides in the front and back) are provided with a heald swing arm, but the heald swing arm can only complete a back-and-forth swing action once in a circle of the cam, which leads to difficulty in further improving the speed of the rapier loom;

[0006] 2. In the currently used heald lifting power group, the heald lifting and weft cam group and the heald swing arm position are fixed, the gap cannot be conveniently adjusted, and if the speed of the loom is to be adjusted, the cam must be replaced, and at the same time, due to the inconvenience of adjusting the gap, the removal of the cam is also troublesome.

[0007] Based on this, the present case is proposed. Content of the utility model

[0008] One of the purposes of the utility model is to provide a single-rod weft cam power box to solve the above problems.

[0009] A single-rod weft cam power box, comprising a box body, an input gear set and a heald lifting power group are arranged in the box body, the heald lifting power group comprises a heald lifting input shaft and a mounting shaft, the input gear set outputs power to the heald lifting input shaft, both ends of the heald lifting input shaft are rotatably connected to the box body through bearings, both ends of the mounting shaft are fixed to the box body, two heald lifting weft cam groups are fixed to the heald lifting input shaft, the heald lifting weft cam group comprises a cam one and a cam two, two heald swing arms corresponding to the heald lifting weft cam group are connected to the mounting shaft through bearings, a roller one matched with the cam one and a roller two matched with the cam two are arranged on the heald swing arm, the cam one drives the roller one to swing the heald swing arm to the left around the mounting shaft, and the cam two drives the roller two to swing the heald swing arm to the right around the mounting shaft; a heald rod is connected to the upper end of the heald swing arm, and the heald rod is used for connecting a heald frame.

[0010] Further, an outer protruding shaft hole is integrally formed at the connection between the box body and the mounting shaft, a screw hole is arranged on the side wall of the outer protruding shaft hole, and a jacking bolt is threadedly connected to the screw hole, the end of the mounting shaft can pass through the outer protruding shaft hole, and the mounting shaft is fixed by rotating the jacking bolt;

[0011] A shaft sleeve and a clamp hoop are arranged, the shaft sleeve is sleeved on the mounting shaft, the shaft sleeve comprises an eccentric section and a locking section, the locking section is circumferentially divided into a plurality of pieces, the clamp hoop is arranged at the outer wall of the locking section, the locking section is contracted by the clamp hoop, so that the shaft sleeve is fixed to the mounting shaft, and the heald swing arm is mounted on the outer wall of the eccentric section through a bearing.

[0012] Further, a rotating structure facilitating the rotation of the shaft body is arranged on the end face of the mounting shaft.

[0013] Further, the box is internally provided with an opening power set, the opening power set comprises an opening input shaft, an opening swing arm shaft, a transmission rod and a left-right moving rod, an input gear set outputs power to the opening input shaft, both ends of the opening input shaft and the opening swing arm shaft are supported on the box through bearings, the opening input shaft is fixed with an opening common weft cam set, the opening common weft cam set comprises cam three and cam four, the opening swing arm shaft is fixed with an opening swing arm, the opening swing arm is provided with roller three matched with the cam three and roller four matched with the cam four, the cam three drives the opening swing arm to swing rightwards around the opening swing arm shaft through the roller three, and the cam four drives the opening swing arm to swing leftwards around the opening swing arm shaft through the roller four.

[0014] Both ends of the transmission rod are rotationally connected with the upper end of the opening swing arm and one end of the left-right moving rod respectively, and the other end of the left-right moving rod is used for connecting the heald frame on the front side, and the box is provided with a limiting structure for limiting the left-right moving rod to move leftward and rightward only.

[0015] Further, the limiting structure comprises a mounting plate fixed with the box, a plurality of left-right arranged roller fives are arranged on the mounting plate, and the rod body of the left-right moving rod is provided with a left-right arranged long circular hole, and the plurality of roller fives can be embedded in the long circular hole.

[0016] Further, the opening swing arm comprises an L-shaped swing arm and a clamping sleeve, one end of the transmission rod is rotationally connected with one side of the clamping sleeve, a vertical hole is formed in the clamping sleeve, the upper end of the L-shaped swing arm can be inserted into the vertical hole upwards, and the side wall of the vertical hole is threadedly connected with a clamping bolt for clamping the upper end of the L-shaped swing arm.

[0017] Further, the input gear set comprises a total input shaft one, an input bevel gear one, a total input shaft two, an input bevel gear two, a transmission gear one, a transmission gear two, a synchronous wheel one and a synchronous wheel two.

[0018] Both ends of the total input shaft one and the total input shaft two are supported on the box through bearings, the input bevel gear one is fixed on the total input shaft one, the input bevel gear two is fixed on the total input shaft two and is in engagement with the input bevel gear one, the transmission gear one is fixed on the total input shaft two, and the transmission gear two is fixed on the heald input shaft and is in engagement with the transmission gear one.

[0019] The synchronous wheel one is fixed on the total input shaft two, the synchronous wheel two is fixed on the opening input shaft, and the synchronous wheel one and the synchronous wheel two are in transmission through a synchronous belt.

[0020] The second purpose of the utility model is to provide a high-speed rapier loom, which is characterized by comprising the single-rod common weft cam power box.

[0021] The utility model has the advantages that:

[0022] 1. By adopting a single-sided heddle swing arm in conjunction with a common weft cam, the design of the cam allows the heddle swing arm to swing back and forth 3 times for one rotation. Compared with existing rapier looms, the power can be increased by 3 times, greatly improving production efficiency.

[0023] 2. By setting an eccentric bushing, the gap between the heddle swing arm and the common weft cam can be adjusted, thereby changing the swing speed of the heddle swing arm and realizing the switching of different fabric modes such as cross weaving, twill weaving, and plain weaving on the rapier loom without disassembling and replacing the cam. At the same time, since the gap between the heddle swing arm and the common weft cam is adjustable, when the gap is adjusted to the maximum, the common weft cam group can be easily disassembled. Attached Figure Description

[0024] Figure 1 This is a three-dimensional structural schematic diagram of the rapier loom in the background technology patent number 201911098547.9;

[0025] Figure 2 for Figure 1 A three-dimensional structural diagram of the integrated power unit;

[0026] Figure 3 This is a three-dimensional structural schematic diagram of the rapier loom described in background technology patent number 202311229695.6;

[0027] Figure 4 for Figure 3 A three-dimensional structural diagram of the integrated power unit;

[0028] Figure 5 This is a three-dimensional structural diagram of the rapier loom in the embodiment;

[0029] Figure 6 for Figure 5 A three-dimensional structural diagram of the power box of a rapier loom;

[0030] Figure 7 for Figure 6 A schematic diagram of the input gear set and the hoisting power set in the power box;

[0031] Figure 8 for Figure 6 A schematic diagram of the structure of the helical concentric cam assembly and the helical swing arm in the power box;

[0032] Figure 9 This is a three-dimensional structural diagram of the swing arm in the embodiment;

[0033] Figure 10 for Figure 9 An explosion diagram;

[0034] Figure 11 This is a schematic diagram of the assembly of the heddle rod and the front and rear heddle frames of the rapier loom in the embodiment;

[0035] Figure 12 Fig. 1 is a schematic view of the whole loom; Figure 11 Fig. 2 is an enlarged schematic view of A part in Fig. 1;

[0036] Figure 13 Fig. 3 is an enlarged schematic view of B part in Fig. 1; Figure 11 Fig. 4 is an enlarged schematic view of C part in Fig. 1;

[0037] Figure 14 Fig. 5 is a schematic view of the structure of input gear set and open power set in power box; Figure 6 Fig. 6 is a schematic view of the structure of input gear set and open power set in power box;

[0038] Figure 15 Fig. 7 is a schematic view of another perspective; Figure 14 Fig. 8 is a schematic view of another perspective; Fig. 9 is a schematic view of another perspective;

[0039] Fig. 10 is an exploded schematic view of open swing arm in embodiment. Figure 16 Fig. 11 is a schematic view of another perspective; Fig. 12 is a schematic view of another perspective;

[0040] Fig. 13 is a schematic view of another perspective; Fig. 14 is a schematic view of another perspective;

[0041] 1, front heddle frame; 2, back heddle frame;

[0042] 3, open power set; 301, open input shaft; 302, open swing arm shaft; 303, transmission rod; 304, left and right moving rod; 305, open common weft cam set; 3051, cam three; 3052, cam four; 306, roller three; 307, roller four; 308, roller five; 309, long round hole; 310, L type swing arm; 311, clamp sleeve; 312, vertical hole; 313, clamping bolt;

[0043] 4, lifting heddle power set; 401, lifting heddle input shaft; 402, mounting shaft; 403, lifting heddle common weft cam set; 4031, cam one; 4032, cam two; 404, screw structure; 405, lifting heddle swing arm; 406, roller one; 407, roller two; 408, outer convex shaft hole; 409, jacking bolt; 410, shaft sleeve; 4101, eccentric section; 4102, locking section; 411, clamp;

[0044] 5, input gear set; 501, total input shaft one; 502, input bevel gear one; 503, total input shaft two; 504, input bevel gear two; 505, transmission gear one; 506, transmission gear two; 507, synchronous wheel one; 508, synchronous wheel two;

[0045] 6, lifting heddle arm;

[0046] 7, lifting heddle rod; 701, lifting heddle connecting rod; 702, lifting heddle end rod; 703, lifting heddle marker rod; 704, screw rod; 705, nut block; 706, locking nut;

[0047] 8, L type connecting piece; 801, right angle end; 802, upper free end; 803, lower free end;

[0048] 9. T-shaped connecting piece; 901. upper free end; 902. middle free end; 903. lower free end; 904. central node;

[0049] 10. Transition structure between open power group and front heald frame. DETAILED DESCRIPTION

[0050] The utility model will be further described in detail below in combination with embodiments. It should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer" and the like in the text indicate the orientation or positional relationship based on the drawings, and are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model. Figure 5

[0051] The embodiment provides a high-speed rapier loom, as shown in Figure 5 and Figure 6 , which comprises a rack, the left side of the rack is provided with a power box, the power box is composed of an input gear set 5, an open power group 3 and a heald raising power group 4, the right side of the rack is provided with front and rear heald frames 1 and 2, T-shaped connecting pieces 9 and L-shaped connecting pieces 8 located below the heald frames and a heald raising arm 6. The input gear set 5 is used for providing power for the open power group 3 and the heald raising power group 4, the open power group 3 is connected with the front heald frame 1 in front through a transition structure 10 as shown in Figure 1 , which is used for realizing the left and right movement of the front heald frame 1 (the transition structure 10 can realize the up and down movement and the left and right movement of the front heald frame 1, and belongs to the prior art). The heald raising power group 4 is connected with heald raising rods 7, the two heald raising rods 7 extend to below the front heald frame 1 and the rear heald frame 2 respectively, and are used for driving the T-shaped connecting pieces 9 and the L-shaped connecting pieces 8 to rotate back and forth, the rotation of the T-shaped connecting pieces 9 and the L-shaped connecting pieces 8 drives the front heald frame 1 and the rear heald frame 2 to move up and down through the heald raising arm 6.

[0052] As shown in Figure 6 , the input gear set 5, the open power group 3 and the heald raising power group 4 are integrated in a box body. As shown in Figures 7 to 10 ​As shown, the heald driving power set 4 includes a heald input shaft 401 and a mounting shaft 402, the input gear set 5 outputs power to the heald input shaft 401, both ends of the heald input shaft 401 are rotatably connected to the box through bearings, both ends of the mounting shaft 402 are fixed to the box, two heald common weft cam sets 403 are fixed on the heald input shaft 401, the heald common weft cam set 403 includes cam one 4031 and cam two 4032, two heald swing arms 405 corresponding to the heald common weft cam set 403 are connected to the mounting shaft 402 through bearings, the heald swing arm 405 is provided with a roller one 406 matched with the cam one 4031 and a roller two 407 matched with the cam two 4032, the cam one 4031 drives the roller one 406 to make the heald swing arm 405 swing left around the mounting shaft 402, and the cam two 4032 drives the roller two 407 to make the heald swing arm 405 swing right around the mounting shaft 402; the upper end of the heald swing arm 405 is rotatably connected to the heald connecting rod 701.

[0053] The single heald swing arm 405 cooperates with the heald common weft cam set 403, through the design of the cam shape, one rotation of the heald swing arm 405 can swing back and forth three times, the power can be increased by three times compared with the existing rapier loom, and the production efficiency is greatly improved.

[0054] The fixing structure between both ends of the mounting shaft 402 and the box is as shown in Figure 7 The connection between the box and the mounting shaft 402 is integrally formed with an outer convex shaft hole 408, the side wall of the outer convex shaft hole 408 is provided with a screw hole and is threadedly connected with a clamping bolt 409, the end of the mounting shaft 402 can pass through the outer convex shaft hole 408, and the mounting shaft 402 is fixed by tightening the clamping bolt 409.

[0055] In order to adjust the gap between the heald swing arm 405 and the heald common weft cam set 403, as shown in Figures 8 to 10As shown, the hoisting power unit 4 includes a bushing 410 and a clamp 411. The bushing 410 is fitted onto the mounting shaft 402. The bushing 410 includes an eccentric section 4101 and a locking section 4102. The locking section 4102 is divided into several pieces along the circumference. The clamp 411 is located on the outer wall of the locking section 4102. By closing the locking section 4102 with the clamp 411, the bushing 410 is fixed to the mounting shaft 402. The hoisting swing arm 405 is mounted on the outer wall of the eccentric section 4101 by a bearing. When adjusting the clearance, loosen the tightening bolt 409 to allow the mounting shaft 402 to rotate relative to the housing. Hold the heddle-starting swing arm 405 firmly with one hand, and apply rotational force to the mounting shaft 402 with the other. The rotation of the mounting shaft 402 causes the bushing 410 to rotate. Since the heddle-starting swing arm 405 and the bushing 410 are connected by a bearing, the rotation of the eccentric section 4101 of the bushing 410 causes a change in the position of the heddle-starting swing arm 405, thereby altering the clearance between the heddle-starting swing arm 405 and the heddle-starting common weft cam assembly 403. This allows for changing the swing speed of the heddle-starting swing arm 405, enabling switching between different fabric weaving modes such as cross-weaving, twill weaving, and plain weaving on the rapier loom without disassembling or replacing the cam. Furthermore, since the clearance between the heddle-starting swing arm 405 and the heddle-starting common weft cam is adjustable, disassembly of the heddle-starting common weft cam assembly 403 is convenient when the clearance is adjusted to its maximum.

[0056] To facilitate the screwing of the mounting shaft 402, this embodiment also provides a screwing structure 404 on the end face of the mounting shaft 402 to facilitate the rotation of the shaft, such as an internal hexagon, external hexagon, slotted, or cross-shaped screw, etc. Figure 9 As shown, this embodiment uses an external hexagonal screw-on structure 404.

[0057] like Figures 14 to 16 As shown, the opening power unit 3 includes an opening input shaft 301, an opening swing arm shaft 302, a transmission rod 303, and a left-right moving rod 304. The input gear set 5 outputs power to the opening input shaft 301. Both ends of the opening input shaft 301 and the opening swing arm shaft 302 are supported on the housing by bearings. An opening common weft cam set 305 is fixed on the opening input shaft 301. The opening common weft cam set 305 includes cam three 3051 and cam four 3052. An opening swing arm is fixed on the opening swing arm shaft 302. The opening swing arm is provided with roller three 306 that cooperates with cam three 3051 and roller four 307 that cooperates with cam four 3052. Cam three 3051 pushes roller three 306 to make the opening swing arm swing to the right around the opening swing arm shaft 302. Cam four 3052 pushes roller four 307 to make the opening swing arm swing to the left around the opening swing arm shaft 302. The two ends of the transmission rod 303 are respectively rotatably connected to the upper end of the open swing arm and one end of the left-right moving rod 304, and the other end of the left-right moving rod 304 is connected via, for example, Figure 1The transition structure shown in the middle connects the front heald frame 1, and the box is provided with a limiting structure for limiting the left and right movement of the left and right moving rod 304.

[0058] As shown in Figure 14 The limiting structure includes a mounting plate fixed to the box, and a plurality of left and right arranged rollers 308 are arranged on the mounting plate. The left and right moving rod 304 has a left and right arranged long circular hole 309 on the rod body, and the plurality of rollers 308 can be embedded in the long circular hole 309.

[0059] As shown in Figure 16 The opening swing arm includes an L-shaped swing arm 310 and a clamping sleeve 311, one side of the clamping sleeve 311 is rotatably connected with one end of the transmission rod 303, a vertical hole 312 is formed on the clamping sleeve 311, the upper end of the L-shaped swing arm 310 can be inserted into the vertical hole 312, and the side wall of the vertical hole 312 is threadedly connected with a clamping bolt 313 for clamping the upper end of the L-shaped swing arm 310. By loosening the clamping bolt 313, the depth of the L-shaped swing arm 310 inserted into the vertical hole 312 can be adjusted vertically to change the length of the opening swing arm, thereby changing the left and right moving speed of the left and right moving rod, realizing different weaving forms of the loom.

[0060] As shown in Figure 7 And Figure 14 The input gear set 5 includes a total input shaft one 501, an input bevel gear one 502, a total input shaft two 503, an input bevel gear two 504, a transmission gear one 505, a transmission gear two 506, a synchronous wheel one 507 and a synchronous wheel two 508. Both ends of the total input shaft one 501 and the total input shaft two 503 are supported on the box through bearings, the input bevel gear one 502 is fixed on the total input shaft one 501, the input bevel gear two 504 is fixed on the total input shaft two 503 and meshes with the input bevel gear one 502, the transmission gear one 505 is fixed on the total input shaft two 503, and the transmission gear two 506 is fixed on the heald input shaft 401 and meshes with the transmission gear one 505. The synchronous wheel one 507 is fixed on the total input shaft two 503, the synchronous wheel two 508 is fixed on the shedding input shaft 301, and the synchronous wheel one 507 and the synchronous wheel two 508 are driven by a synchronous belt.

[0061] Power is input from the main input shaft 501, passing sequentially through input bevel gear 502, input bevel gear 504, main input shaft 503, transmission gear 505, and transmission gear 506, reaching the heddle input shaft 401. This drives the heddle common weft cam assembly 403 to rotate, thereby causing the two heddle swing arms 405 to swing back and forth. Power is also input from the main input shaft 501, passing sequentially through input bevel gear 502, input bevel gear 504, main input shaft 503, synchronous pulley 507, synchronous belt, and synchronous pulley 508, reaching the open input shaft 301. This drives the open common weft cam assembly 305 to rotate, thereby causing the left-right moving rod 304 to move back and forth left and right through the open swing arms.

[0062] like Figures 11 to 13 As shown, the L-shaped connector 8 includes two free ends 802 and 803, and a right-angle end 801, wherein the right-angle end 801 is rotatably connected to the frame. The T-shaped connector 9 includes three free ends 901, 902, and 903, and a center node 904, wherein the center node 904 is rotatably connected to the frame. There are multiple heddle-lifting arms 6. The lower end of the heddle-lifting arm 6 located at the T-shaped connector 9 is rotatably connected to the middle free end 902 of the T-shaped connector 9. The lower end of the heddle-lifting arm 6 located at the L-shaped connector 8 is rotatably connected to the upper free end 802 of the L-shaped connector 8. The upper end of the heddle-lifting arm 6 is rotatably connected to the lower edge of the heddle frame. The heddling rod 7 includes a heddling connecting rod 701, a heddling end rod 702, and a heddling marker rod 703. One end of the heddling connecting rod 701 is rotatably connected to the upper end of the heddling swing arm 405, and the other end is rotatably connected to the upper free end 901 of the T-shaped connector 9. The heddling end rod 702 is located between the T-shaped connector 9 and the L-shaped connector 8, and its two ends are rotatably connected to the lower free end 903 of the T-shaped connector 9 and the lower free end 803 of the L-shaped connector 8, respectively. The heddling marker rod 703 is located between two adjacent L-shaped connectors 8, and its two ends are rotatably connected to the lower free end 803 of the L-shaped connector 8, respectively. The helical linkage 701, helical end rod 702, and helical marker rod 703 each include a rod portion, screws 704 located at both ends of the rod portion, nut blocks 705 located at both ends of the rod portion, and locking nuts 706. The end faces of both ends of the rod portion are provided with internal threaded holes. One end of the screw 704 can be screwed into the internal threaded hole of the rod end and locked with the locking nut 706. The other end of the screw 704 can be screwed into the nut block 705 and locked with the locking nut 706. The end of the locking nut 706 away from the screw 704 is used for rotatable connection with the L-shaped connector 8, the T-shaped connector 9, or the output end of the power box.

[0063] The heald bar 7 is disassembled from a single integral member into multiple independent members. In case of a malfunction, the corresponding faulty member can be removed without disassembling the entire loom, simplifying maintenance. Furthermore, the connection method between the screw 704 and the locking nut 706 facilitates adjustments by maintenance personnel.

[0064] The above examples are only used to explain the concept of the present application, and are not intended to limit the scope of protection of the present application. Any non-essential changes made to the present application using this concept shall fall within the scope of protection of the present application.

Claims

1. A single-bar common-weft cam power box, comprising a housing, wherein an input gear set and a hoisting power set are provided inside the housing, characterized in that: The heddle-starting power unit includes a heddle-starting input shaft and a mounting shaft. The input gear set outputs power to the heddle-starting input shaft. The two ends of the heddle-starting input shaft are rotatably connected to the housing via bearings. The two ends of the mounting shaft are fixed to the housing. Two heddle-starting common weft cam sets are fixed on the heddle-starting input shaft. The heddle-starting common weft cam sets include cam one and cam two. Two heddle-starting swing arms corresponding to the heddle-starting common weft cam sets are connected to the mounting shaft via bearings. The heddle-starting swing arms are equipped with roller one that cooperates with cam one and roller two that cooperates with cam two. Cam one pushes roller one to make the heddle-starting swing arm swing to the left around the mounting shaft. Cam two pushes roller two to make the heddle-starting swing arm swing to the right around the mounting shaft. The upper end of the heddle-starting swing arm is connected to a heddle-starting rod, which is used to connect to the heddle frame.

2. The single-bar common-weft cam power box as described in claim 1, characterized in that, The connection between the housing and the mounting shaft is integrally formed with an externally protruding shaft hole. The side wall of the externally protruding shaft hole is provided with a screw hole and a tightening bolt is threadedly connected. The end of the mounting shaft can pass through the externally protruding shaft hole and the mounting shaft is fixed by tightening the tightening bolt. It includes a bushing and a clamp. The bushing is fitted onto the mounting shaft. The bushing includes an eccentric section and a locking section. The locking section is divided into several pieces along the circumference. The clamp is set on the outer wall of the locking section. The clamp closes the locking section, so that the bushing is fixed to the mounting shaft. The helical swing arm is mounted on the outer wall of the eccentric section through a bearing.

3. The single-bar common-weft cam power box as described in claim 2, characterized in that, The end face of the mounting shaft is provided with a screwing structure to facilitate the rotation of the shaft.

4. The single-bar common-weft cam power box as described in claim 1, characterized in that, The housing is equipped with an opening power assembly, which includes an opening input shaft, an opening swing arm shaft, a transmission rod, and a left-right moving rod. The input gear set outputs power to the opening input shaft. Both ends of the opening input shaft and the opening swing arm shaft are supported on the housing by bearings. An opening common weft cam assembly is fixed on the opening input shaft. The opening common weft cam assembly includes cam three and cam four. An opening swing arm is fixed on the opening swing arm shaft. The opening swing arm is equipped with roller three that cooperates with cam three and roller four that cooperates with cam four. Cam three pushes roller three to make the opening swing arm swing to the right around the opening swing arm axis. Cam four pushes roller four to make the opening swing arm swing to the left around the opening swing arm axis. The two ends of the transmission rod are rotatably connected to the upper end of the open swing arm and one end of the left and right moving rod, respectively. The other end of the left and right moving rod is used to connect to the front heald frame. The box body is provided with a limit structure to restrict the left and right moving rod to move only in the left and right directions.

5. A single-bar common-weft cam power box as described in claim 4, characterized in that, The limiting structure includes a mounting plate fixed to the housing, and a plurality of rollers arranged in a left-right direction are provided on the mounting plate. The rod of the left-right moving rod is provided with an elongated hole arranged in a left-right direction, and the plurality of rollers can be precisely embedded in the elongated hole.

6. A single-bar common-weft cam power box as described in claim 4, characterized in that, The open swing arm includes an L-shaped swing arm and a sleeve. One side of the sleeve is rotatably connected to one end of the transmission rod. A vertical hole is provided on the sleeve. The upper end of the L-shaped swing arm can be inserted into the vertical hole. A clamping bolt for clamping the upper end of the L-shaped swing arm is threadedly connected to the side wall of the vertical hole.

7. A single-bar common-weft cam power box as described in claim 4, characterized in that, The input gear set includes a main input shaft one, an input bevel gear one, a main input shaft two, an input bevel gear two, a transmission gear one, a transmission gear two, a synchronizing pulley one, and a synchronizing pulley two; Both ends of the main input shaft one and main input shaft two are supported on the housing by bearings. The input bevel gear one is fixed on the main input shaft one, the input bevel gear two is fixed on the main input shaft two and meshes with the input bevel gear one, the transmission gear one is fixed on the main input shaft two, and the transmission gear two is fixed on the hoisting input shaft and meshes with the transmission gear one. Synchronous pulley one is fixed on the main input shaft two, synchronous pulley two is fixed on the open input shaft, and synchronous pulley one and synchronous pulley two are driven by synchronous belt.

8. A high-speed rapier loom, characterized in that, Includes the single-bar concentric cam power box as described in any one of claims 1 to 7.

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