automatic heald lifting mechanism

Abstract

The application discloses an automatic heald lifting mechanism, comprising a rack, a plurality of synchronous belt groups, a heald frame structure, a plurality of pneumatic mechanisms and a driving structure, each synchronous belt group comprises an axle and a synchronous belt sleeved outside the axle, among the plurality of synchronous belt groups, the plurality of axles are spaced in the up-down direction, so that the plurality of synchronous belts are sequentially nested; the heald frame structure comprises a plurality of heald frames fixed on the plurality of synchronous belts respectively, each heald frame is arranged in the longitudinal direction, so as to be movable up and down with the corresponding synchronous belt; each pneumatic mechanism comprises an air inflation shaft and a buffer structure, one end of the air inflation shaft is connected with the buffer structure, and the friction of the connection can be adjusted, the other end of the air inflation shaft is connected with the corresponding axle; the driving structure comprises a motor fixed to the rack, the main shaft of the motor extends in the transverse direction and is drivingly connected with the plurality of buffer structures, so that the buffer structure and the air inflation shaft are synchronously rotated when the motor rotates, thereby driving the corresponding axle to rotate and enabling the synchronous belt to move up and down.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of textile equipment, in particular to an automatic heald lifting mechanism. BACKGROUND

[0002] At present, most of the material weaving is completed by a loom, and the heald lifting mechanism is an important component of the loom. The mechanism form, movement precision and stability of the heald lifting mechanism directly affect the efficiency, speed and quality of the loom weaving. The heald lifting mechanism needs to lift the yarn to form a shed. The current driving mode of the heald lifting mechanism is generally one driving control one heald frame, which occupies a large space. Some heald frames are controlled by one motor, but the heald frame combination movement is limited and cannot be independently controlled, which cannot meet the needs of weaving any fabric structure and weaving process. SUMMARY

[0003] The main purpose of the present application is to provide an automatic heald lifting mechanism, which can independently control the movement of multiple heald frames by one driving, has good stability, and has small burden on the driving structure.

[0004] To achieve the above purpose, the present application provides an automatic heald lifting mechanism, comprising:

[0005] a rack;

[0006] a plurality of synchronous belt groups, each of the synchronous belt groups comprising an axle and a synchronous belt sleeved outside the axle, and in the plurality of synchronous belt groups, the plurality of axles are spaced in the up-down direction so that the plurality of synchronous belts are sequentially nested;

[0007] a heald frame structure comprising a plurality of heald frames fixed on the plurality of synchronous belts respectively, each of the heald frames being arranged in the longitudinal direction so as to be movable up and down with the corresponding synchronous belt;

[0008] a plurality of pneumatic mechanisms, each of the pneumatic mechanisms comprising a gas expansion shaft and a buffer structure, one end of the gas expansion shaft being connected to the buffer structure and the friction force of the connection being adjustable, the other end of the gas expansion shaft being connected to the corresponding axle; and

[0009] a driving structure comprising a motor fixed to the rack, the main shaft of the motor extending in the transverse direction and being in transmission connection with the plurality of buffer structures, so that when the motor rotates, the buffer structures and the gas expansion shafts rotate synchronously, thereby driving the corresponding axles to rotate and making the synchronous belts move up and down.

[0010] Optionally, each of the buffer structures is formed with a mounting groove on the side away from the motor;

[0011] each of the gas expansion shafts comprises:

[0012] A shaft cylinder having an inner cavity for storing gas, one end of the shaft cylinder extends into the mounting slot, and the end of the circumferential surface is provided with a plurality of through holes distributed at intervals, the other end corresponds to the wheel shaft connection, the circumferential surface of the shaft cylinder is also provided with a plurality of air inlet holes distributed along the axial direction, and the plurality of air inlet holes and the plurality of through holes are spaced along the length direction of the shaft cylinder;

[0013] An air receiving ring is sleeved on the outside of the shaft cylinder and can rotate relative to the shaft cylinder, the air receiving ring covers the outside of the plurality of air inlet holes, the air receiving ring is provided with an air receiving hole, the air receiving hole is used to install a gas valve connected to an external air pipe, and when the shaft cylinder is driven to rotate, the air receiving hole is always connected to at least one air inlet hole to introduce gas into the inner cavity.

[0014] A plurality of pneumatic terminals are respectively arranged at the plurality of through holes and are in movable sealing with the shaft cylinder, and the plurality of pneumatic terminals are used to protrude from the shaft cylinder to contact the side wall of the mounting slot or be accommodated in the inner cavity when the air pressure in the shaft cylinder changes.

[0015] Optionally, the middle part of the shaft cylinder is provided with an annular groove, and the bottom wall surface of the annular groove is provided with a plurality of air inlet holes;

[0016] The air receiving ring is clamped in the annular groove.

[0017] Optionally, each of the buffer structures comprises:

[0018] A passive air pushing piece is arranged in a cylindrical shape with one side open, a baffle is arranged in the middle of the bottom wall of the passive air pushing piece, one end of the baffle abuts against the wall surface of the passive air pushing piece, and the other end is arranged in a columnar shape to form a positioning column, and an annular groove is arranged on the circumferential surface of the passive air pushing piece close to the open side to sleevedly install a sealing ring; and

[0019] An active pushing piece is arranged in a cylindrical shape with one side open, is sleeved on the outside of the passive air pushing piece, and is in sealing cooperation with the passive air pushing piece through the sealing ring to form a sealed cavity, the bottom wall of the active pushing piece is provided with a vane, and the vane can extend into the passive air pushing piece, one end of the vane along the diameter direction of the active pushing piece is in contact with the inner wall of the passive air pushing piece, and the other end is arranged in an arc surface to be in contact with the positioning column, and the active pushing piece is drivingly connected with the motor, so that the vane can rotate around the positioning column to extrude the air in the sealed cavity during the rotation of the active pushing piece, so that the passive air pushing piece can move with the active pushing piece.

[0020] Optionally, the driving structure further comprises:

[0021] Two support plates are arranged on the rack in a transverse direction at intervals.

[0022] A gear set is located between the two support plates, and the gear set comprises a plurality of driving gears and a plurality of reversing gears arranged alternately and engaged with each other. One end of the plurality of driving gears is connected to the plurality of buffer structures through a plurality of speed reducers. The other end of the gear shaft of one of the driving gears is connected to the main shaft of the motor through one of the support plates. The two ends of the gear shaft of the plurality of reversing gears are rotatably installed on the two support plates, respectively. The plurality of speed reducers are fixed to the other support plate.

[0023] Optionally, the automatic heald lifting structure further comprises a plurality of one-way dampers cooperating with the plurality of wheel shafts to fix and control the upper limit of each heald frame and the speed of each heald frame descending.

[0024] Optionally, each one-way damper comprises:

[0025] A steering engine is fixed to the frame, and the end of the main shaft of the steering engine is connected to a threaded rod.

[0026] A connecting ring is provided with a sawtooth-shaped inner hole.

[0027] A friction ring is sleeved on the outside of the connecting ring, and a strip-shaped hole is formed in the friction ring to tightly hold or release the connecting ring when threadedly cooperating with the threaded rod; and

[0028] A damper sawtooth ring is sleeved and fixed on the outside of the corresponding wheel shaft and arranged in the inner hole of the connecting ring. The teeth of the damper sawtooth ring are arranged in an inclined manner and are made of an elastically deformable material to be able to rotate synchronously with the connecting ring or rotate oppositely with the connecting ring during the rotation of the wheel shaft.

[0029] Optionally, each heald frame comprises:

[0030] A frame body is fixed to the synchronous belt.

[0031] Two heald wire fixing members are arranged on the upper and lower sides of the frame body to wind the heald wire.

[0032] A heald frame limiting block is fixed to the frame and located below the frame body to limit the downward movement of the frame body.

[0033] A separation structure comprises two separation blocks located on the longitudinal sides of the frame body, respectively. The opposite sides of the two separation blocks are provided with a plurality of clamping grooves. Each clamping groove is provided with a roller rotatable along an axis extending in the transverse direction. Each roller is in contact with the corresponding side of the frame body and rotates with the frame body when the frame body is driven to move.

[0034] Optionally, each of the synchronous belt groups further comprises at least two supporting rods fixed to the frame and around which the corresponding synchronous belt is arranged to define a flat section arranged upwardly on the corresponding synchronous belt.

[0035] The automatic heald lifting mechanism further comprises a plurality of tensioning assemblies, each of the tensioning assemblies comprising:

[0036] a cooperating block fixedly installed on the frame;

[0037] a tensioning screw threaded through the cooperating block; and

[0038] a tensioning shaft located above the corresponding flat section, an outer portion of the tensioning shaft being sleeved with a tensioning wheel to abut against the flat section, an end portion of the tensioning shaft being located below the cooperating block and being capable of contacting an end portion of the tensioning screw to be driven downwardly to press the tensioning shaft against the synchronous belt when the tensioning screw is tightened downwardly.

[0039] Optionally, each of the synchronous belt groups comprises two transversely spaced synchronous belts, and the cooperating block, the tensioning wheel and the tensioning screw are correspondingly provided for the two synchronous belts; and / or,

[0040] The bottom of the frame is provided with a plurality of support foot pads spaced along the circumference of the frame, and the height of each of the support foot pads is adjustable.

[0041] In the technical scheme, one motor is provided as the power source of the whole mechanism, a plurality of shafts are driven to rotate synchronously by transmission cooperation to make a plurality of synchronous belts synchronously lift heald frames, the pneumatic mechanism is used to control the transmission of power to realize the control of a single motor on a plurality of heald frames, the design of the buffer structure is used to prevent the rapid increase of load and affect the service life of the motor, and the buffer structure can temporarily store adverse energy to protect the motor, so that the stability of the equipment is higher and the operation of the equipment is more stable. The friction force of the gas expansion shaft cooperating with the buffer mechanism is adjustable by controlling the air intake amount of the gas expansion shaft, so that the motor is protected when the load is suddenly and abnormally too large and the gas expansion shaft and the buffer mechanism slip, and the size of the transmitted energy can be controlled by controlling the air intake amount of the gas expansion shaft per unit time to meet the needs of different weaving and different looms, and the universality of the heald lifting mechanism is improved. BRIEF DESCRIPTION OF DRAWINGS

[0042] In order to more clearly illustrate the technical scheme in the embodiments of the present application or the prior art, the drawings needed to be used in the following embodiment or prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor on the basis of the drawings shown.

[0043] Figure 1 Fig. 1 is a perspective view of an embodiment of the automatic heald lifting mechanism provided by the present application;

[0044] Figure 2 Fig. 2 is a perspective view of the pneumatic mechanism in the automatic heald lifting mechanism provided by the present application; Figure 1 Fig. 3 is an exploded view of the pneumatic mechanism and the driving structure in the automatic heald lifting mechanism provided by the present application;

[0045] Figure 3 Fig. 4 is a perspective view of the inflation shaft in the automatic heald lifting mechanism provided by the present application; Figure 2 Fig. 5 is an exploded view of the inflation shaft in the automatic heald lifting mechanism provided by the present application;

[0046] Figure 4 Fig. 6 is a perspective view of the buffer structure in the automatic heald lifting mechanism provided by the present application; Figure 2 Fig. 7 is an exploded view of the buffer structure in the automatic heald lifting mechanism provided by the present application;

[0047] Figure 5 Fig. 8 is a perspective view of the driving structure in the automatic heald lifting mechanism provided by the present application; Figure 1 Fig. 9 is an exploded view of the driving structure in the automatic heald lifting mechanism provided by the present application;

[0048] Figure 6 Fig. 10 is a perspective view of the automatic heald lifting mechanism in the automatic heald lifting mechanism provided by the present application; Figure 1 Fig. 11 is an exploded view of the automatic heald lifting mechanism in the automatic heald lifting mechanism provided by the present application;

[0049] Figure 7 Fig. 12 is a perspective view of the one-way damper in the automatic heald lifting mechanism provided by the present application; Figure 1 Fig. 13 is an exploded view of the one-way damper in the automatic heald lifting mechanism provided by the present application;

[0050] Figure 8 Fig. 14 is a perspective view of the heald frame structure in the automatic heald lifting mechanism provided by the present application; Figure 1 Fig. 15 is a perspective view of the heald frame structure in the automatic heald lifting mechanism provided by the present application;

[0051] Figure 9 Fig. 16 is a perspective view of the multiple partition structures in the automatic heald lifting mechanism provided by the present application; Figure 1 Fig. 17 is an exploded view of the multiple partition structures in the automatic heald lifting mechanism provided by the present application.

[0052] BRIEF DESCRIPTION OF THE DRAWINGS

[0053]

[0054]

[0055] The implementation, functional features and advantages of the present application will be further described with reference to the embodiments and the accompanying drawings. DETAILED DESCRIPTION

[0056] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the present application.

[0057] It should be noted that if the embodiments of the present application involve directionality indication, the directionality indication is only used to explain the relative position relationship, motion condition and the like between components in a certain posture, and if the certain posture changes, the directionality indication also changes accordingly.

[0058] In addition, if the embodiments of the present application involve descriptions such as "first", "second", etc., the descriptions of "first", "second", etc. are only for description purposes and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can explicitly or implicitly include at least one of the features. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the realization of a person skilled in the art, and when the combination of technical solutions contradicts each other or cannot be realized, it should be considered that the combination of technical solutions does not exist and is not within the protection scope required by the present application.

[0059] The heald lifting mechanism is now mostly controlled by one motor for one heald frame, or one motor for two heald frames. One motor for one heald frame has high cost and large space occupation, and one motor for two heald frames has limited heald frame motion combination mode, can only move in the designed mode, cannot be independently controlled, and cannot meet the needs of weaving any fabric structure and weaving process. There are also very few one control multiple through clutches, but the load changes suddenly, which greatly damages the service life of the motor, easily burns the motor, and has poor stability and complex mechanism. Therefore, it is necessary to design an automatic heald lifting mechanism with low cost, which can independently control the motion of multiple heald frames by one motor, is simple to install, has simple structure and good stability.

[0060] In view of this, the present application provides an automatic heald lifting mechanism, Figures 1 to 9 The embodiments of the automatic heald lifting mechanism provided by the present application.

[0061] Please refer to Figure 1 and Figure 6The automatic heald lifting mechanism 100 comprises a frame 1, a plurality of synchronous belt groups 2, a heald frame structure 3, a plurality of pneumatic mechanisms 4 and a driving structure, each of the synchronous belt groups 2 comprises a wheel shaft 21 and a synchronous belt 22 sleeved outside the wheel shaft 21, among the plurality of synchronous belt groups 2, the plurality of wheel shafts 21 are spaced in the up-down direction, so that the plurality of synchronous belts 22 are arranged in sequence in a nested manner; the heald frame structure 3 comprises a plurality of heald frames fixed on the plurality of synchronous belts 22 respectively, each of the heald frames is arranged in the longitudinal direction, so as to be movable up and down with the corresponding synchronous belt 22; each of the pneumatic mechanisms 4 comprises a gas expansion shaft 41 and a buffer structure 42, one end of the gas expansion shaft 41 is connected with the buffer structure 42, and the friction force of the connection can be adjusted, the other end of the gas expansion shaft 41 is connected with the corresponding wheel shaft 21; the driving structure comprises a motor 51 fixed to the frame 1, the main shaft of the motor 51 extends in the transverse direction and is in transmission connection with the plurality of buffer structures 42, so that when the motor 51 rotates, the buffer structure 42 and the gas expansion shaft 41 are driven to rotate synchronously, thereby driving the corresponding wheel shaft 21 to rotate and making the synchronous belt 22 move up and down.

[0062] In the technical scheme of the present application, one motor 51 is arranged as the power source of the whole mechanism, a plurality of wheel shafts 21 are driven to rotate through transmission cooperation to make the plurality of synchronous belts 22 lift the heald frames, the pneumatic mechanism 4 is used for controlling the transmission of power, the control of a single motor 51 on a plurality of heald frames is realized, the buffer structure 42 is designed to prevent the rapid increase of load and affect the service life of the motor 51, and can temporarily store adverse energy, protect the motor 51, so that the stability of the equipment is higher and the equipment runs more smoothly. The air intake amount of the gas expansion shaft 41 is controlled, so that the friction force of the gas expansion shaft 41 and the buffer mechanism can be adjusted, so that when the load is suddenly and abnormally too large, the two slip to protect the motor 51, and the size of the transmitted energy can be controlled by controlling the air intake amount of the gas expansion shaft 41 per unit time, the needs of different weaving and different looms are met, and the universality of the heald lifting mechanism is improved.

[0063] It should be understood that when the friction force between the gas expansion shaft 41 and the buffer structure 42 reaches a certain value, the two can be driven to rotate synchronously by the motor 51, thereby driving the corresponding wheel shaft 21 to rotate; when the friction force is insufficient, the two rotate relatively, only the buffer structure 42 is driven to rotate, the gas expansion shaft 41 may be fixed or slightly rotated, and the provided force value is insufficient to drive the wheel shaft 21 to rotate, at this time the heald frame will not be driven to move by the synchronous belt 22, by controlling the friction force of each gas expansion shaft 41 and the corresponding buffer structure 42 to be different, a part of the plurality of heald frames can be lifted, and a part of the plurality of heald frames can be stationary, by changing the air intake amount of each gas expansion shaft 41 at any time, the plurality of heald frames can be lifted in sequence, and different fabric requirements can be matched.

[0064] To achieve the function of the air inflation shaft 41, the friction can be changed by controlling the expansion and contraction of the shape of the air inflation shaft 41. In the present embodiment, please refer to Figure 3 , each of the buffer structures 42 is formed with a mounting groove on the side facing away from the motor 51; each of the air inflation shafts 41 includes a shaft cylinder 411, an air connection ring 412, and a plurality of pneumatic terminals 413. The shaft cylinder 411 has an inner cavity for storing gas. One end of the shaft cylinder 411 extends into the mounting groove, and the end portion is provided with a plurality of through holes spaced apart on the circumferential side. The other end is connected to the corresponding wheel shaft 21. The circumferential side of the shaft cylinder 411 is also provided with a plurality of air inlet holes distributed along the axial direction. The plurality of air inlet holes are spaced apart along the length direction of the shaft cylinder 411. The air connection ring 412 is sleeved on the outside of the shaft cylinder 411 and can rotate relative to the shaft cylinder 411. The air connection ring 412 covers the outside of the plurality of air inlet holes. The air connection ring 412 is provided with an air connection hole for mounting an air valve connected to an external air pipe. When the shaft cylinder 411 is driven to rotate, the air connection hole is always in communication with at least one of the air inlet holes to enable the introduction of gas into the inner cavity. The plurality of pneumatic terminals 413 are respectively arranged at the plurality of through holes and are in movable sealing with the shaft cylinder 411. The plurality of pneumatic terminals 413 are used to protrude from the shaft cylinder 411 to contact the side wall of the mounting groove or be accommodated in the inner cavity when the air pressure in the shaft cylinder 411 changes. In use, the air valve is always connected to the external air pipe, and the external air pipe is connected to the air pump for air supply. The air pump can be controlled to intake or exhaust air by controlling the opening and closing of the air valve or the air intake amount. When the air pressure in the inner cavity of the shaft cylinder 411 is sufficient, the plurality of pneumatic terminals 413 are completely expanded to abut against the mounting groove. At this time, the shaft cylinder 411 can rotate synchronously with the buffer structure 42. In this process, the shaft cylinder 411 rotates by friction fitting and rotates relative to the air connection ring 412. This makes the air connection hole always communicate with at least one air inlet hole to ensure sufficient air supply, thereby ensuring the stability of the rotating fitting. When the air pressure in the inner cavity of the shaft cylinder 411 is insufficient, the pneumatic terminal 413 may not protrude or only partially protrude. At this time, the friction fitting force is not enough to achieve synchronous rotation. By controlling the air intake amount, the friction force can be controlled. When the load suddenly increases abnormally and is greater than the set friction force, slipping occurs, which has a protective effect on the motor 51. Controlling the air intake or no air intake can achieve control of the power transmission.

[0065] It should be understood that the corresponding wheel shaft 21 of each shaft cylinder 411 can be connected by a shaft coupling to provide good power transmission.

[0066] It should be noted that the pneumatic terminal 413 is preferably made of a material with a certain flexibility to perform extrusion friction fitting and avoid scratching caused by hard friction of a hard structure.

[0067] Further, the middle part of the shaft cylinder 411 is provided with an annular groove, the bottom wall surface of the annular groove is provided with a plurality of air inlet holes, the air inlet ring 412 is clamped in the annular groove to ensure good clamping cooperation of the two, thereby facilitating the limiting of the periphery, ensuring good rotation corresponding relationship of the air inlet hole and the air inlet hole.

[0068] The present application does not limit the specific form of the buffer structure 42, in the present embodiment, please refer to Figure 4 , each of the buffer structure 42 includes a passive air pushing piece 421 and an active thrust piece 422, the passive air pushing piece 421 is provided in a tubular shape with one side open, the middle part of the bottom wall of the passive air pushing piece 421 is provided with a baffle, one end of the baffle is abutted against the wall surface of the passive air pushing piece, the other end is provided in a columnar shape to form a positioning column, the periphery of the passive air pushing piece 421 is provided with an annular groove close to the open side to allow a sealing ring 423 to be installed, the active thrust piece 422 is provided in a tubular shape with one side open, is installed outside the passive air pushing piece 421 and is sealed with the passive air pushing piece 421 through the sealing ring 423 to form a sealed cavity, the bottom wall of the active thrust piece 422 is provided with a blade, and the blade can extend into the passive air pushing piece 421, one end of the blade along the diameter direction of the active thrust piece 422 is in contact with the inner wall of the passive air pushing piece 421, the other end is provided in an arc surface to contact the positioning column, the active thrust piece 422 is drivingly connected with the motor 51, so that the blade can rotate around the positioning column to extrude the air in the sealed cavity during rotation of the active thrust piece 422, so that the passive air pushing piece 421 can move with the active thrust piece. Specifically, when the active thrust piece 322 is driven to rotate, the passive air pushing piece 421 will not rotate immediately, with the rotation of the blade, the air on one side of the blade is compressed, the air pressure increases, and the air pressure on the other side is smaller at this time, so that a pressure difference is formed in the sealed cavity, when the pressure difference reaches a certain value, the passive air pushing piece 421 will be driven to rotate. The blade takes the positioning column as the rotation center, which is convenient for guiding the two tubular parts, and the inherent characteristics of the gas can realize slow increase of the load, which protects the motor 51, and can store sudden abnormal energy, so that the mechanism runs more smoothly and the stability of the mechanism is improved.

[0069] It should be noted that in other embodiments, the buffer structure 42 can also be provided as a structure similar to an air bag, an air spring or the like, which can also realize the corresponding function by reasonable matching, and the present application does not make detailed description.

[0070] In order to realize that one motor 51 drives a plurality of wheel shafts 21 to rotate, gear cooperation or other transmission modes can be used, in an embodiment, please refer to Figure 2 and Figure 5The driving structure further comprises two support plates 52 and a gear set. The two support plates 52 are arranged on the frame 1 in transverse direction. The gear set is arranged between the two support plates 52. The gear set comprises a plurality of driving gears 531 and a plurality of reversing gears 532 arranged alternately and engaged with each other. One end of the plurality of driving gears 531 is connected to the plurality of buffer structures 42 through a plurality of speed reducers 54. The other end of the gear shaft 21 of one of the driving gears 531 is connected to the main shaft of the motor 51 through one of the support plates 52. The gear shaft 21 of the plurality of reversing gears 532 is rotatably arranged on the two support plates 52. The plurality of speed reducers 54 are fixed to the other support plate 52. The two support plates 52 serve as support plates to support the speed reducers 54 and the corresponding gear shafts 21. When the main shaft of the motor 51 rotates, the gear shaft 21 of one of the driving gears 531 is driven to rotate. Due to the engagement between the driving gears 531 and the reversing gears 532, the plurality of driving gears 531 can adapt to the interval between the adjacent two wheel shafts 21 and rotate synchronously, thereby driving the plurality of wheel shafts 21 to rotate. The power transmission of the motor 51 is achieved.

[0071] Further, the motor 51 is a servo motor 51. The motor 51 can be connected to the corresponding parts through a shaft coupling. The fixed seat of the motor 51 is mounted on the frame 1 through a support, thereby adapting to the corresponding installation height. Considering the frictional force of the reversing gears 532, the gear shaft 21 of each reversing gear 532 can be arranged on the corresponding support plate 52 through a bearing.

[0072] In order to further improve the operation control of the mechanism, in one embodiment, the automatic heald lifting structure further comprises a plurality of one-way dampers 6. The plurality of one-way dampers 6 are arranged on the plurality of wheel shafts 21 to fix the upper limit of each heald and control the speed of the descent of each heald. It should be understood that the one-way dampers 6 need to be reasonably arranged to achieve their functions. However, the existing dampers are mostly bidirectional dampers, which cannot achieve the functions. Therefore, in the present embodiment, please refer to Figure 7, each of the one-way dampers 6 comprises a steering engine 61 fixed to the frame 1, a threaded rod connected to an end of a main shaft of the steering engine 61, a connecting ring 63 with a sawtooth-shaped inner hole, a friction ring 62 sleeved on the outside of the connecting ring 63 and provided with a strip-shaped hole to tightly hold or release the connecting ring 63 when threadedly matched with the threaded rod, and a damper sawtooth ring 64 sleeved and fixed on the outside of the corresponding wheel shaft 21 and arranged in the inner hole of the connecting ring 63, the tooth part of the damper sawtooth ring 64 is arranged in an inclined manner and is made of a material capable of being elastically deformed, so as to synchronously rotate with the connecting ring 63 or relatively rotate with the connecting ring 63 during the rotation of the wheel shaft 21. The damper sawtooth ring 64 is designed to simulate the matching form of a cable tie, for example, in the embodiment shown in the accompanying drawings, when rotating clockwise, the tooth part of the damper sawtooth ring 64 is in close engagement with the connecting ring 63, at this time, the two can synchronously rotate, when rotating counterclockwise, the tooth part of the damper sawtooth ring 64 can be elastically deformed along the direction of the inner teeth of the connecting ring 63, at this time, the damper sawtooth ring 64 can slide and rotate, the relative friction is small, at this time, the connecting ring 63 does not synchronously move, thereby realizing the effect of one-way damping. Specifically, when the heald frame moves upward, the wheel shaft 21 drives the damper sawtooth ring 64 to rotate counterclockwise, the damper sawtooth ring 64 relatively moves with the connecting ring 63, the connecting ring 63 is basically stationary, therefore, there is basically no resistance between the connecting ring 63 and the friction ring 62. When the heald frame moves downward or has a downward movement trend, the damper sawtooth ring 64 drives the connecting ring 63 to synchronously rotate and thus generates a friction force with the friction ring 62, by controlling the steering engine 61 to drive the threaded rod to rotate, the friction force between the friction ring 62 and the connecting ring 63 can be changed by changing the holding pressure of the friction ring 62 on the connecting ring 63. When the heald frame moves upward to the upper limit position, the friction force between the connecting ring 63 and the friction ring 62 is greater than the weight of the heald frame, which can prevent the heald frame from falling after the air inflation shaft 41 is broken, when the heald frame needs to move downward, the friction force between the connecting ring 63 and the friction ring 62 is slightly smaller than the weight of the heald frame, which can ensure the heald frame to slowly descend and protect the heald frame. The design of the damping matching structure can stop the heald frame at any position by controlling the locking of the steering engine 61, the upper limit position can be arbitrarily controlled, stepless heald raising can be realized, and the opening requirements of different weavings and weavers can be met.

[0073] Further, please refer to Figure 6 、 Figure 8 and Figure 9, each of the heald frames comprises a frame body 31, two heald wire fixing members 32, a heald frame limiting block 33 and a separation structure, the frame body 31 is fixed to the synchronous belt 22; the two heald wire fixing members 32 are arranged on the upper and lower sides of the frame body 31 in a spaced manner, and are used for winding heald wires; the heald frame limiting block 33 is fixed to the rack 1 and is located below the frame body 31, and is used for limiting the downward movement stroke of the frame body 31, the separation structure comprises two separation blocks 34 located on the longitudinal sides of the frame body 31 respectively, the opposite sides of the two separation blocks 34 are each provided with a plurality of clamping grooves, each of the clamping grooves is provided with a roller 311 which can rotate along an axis extending in the transverse direction, each of the rollers 311 is in contact with the corresponding side of the frame body 31, and rotates when the frame body 31 is driven to move. The heald frame part is used for lifting the yarn to form a shed, thereby providing conditions for the weaving of the fabric. Each of the heald frames corresponds to at least two separation blocks 34, the two separation blocks 34 limit the position of the heald frame in the longitudinal direction, thereby avoiding warping of the heald frame, when the heald frame is driven to move, it can move in the gap between the two separation blocks 34, at this time the roller 311 is driven to roll, thereby reducing the sliding friction of the heald frame and avoiding wear caused by sliding friction. The plurality of separation structures corresponding to the plurality of heald frames can be arranged in a row next to each other, thereby separating the plurality of heald frames in the longitudinal direction.

[0074] It should be understood that in other embodiments, the specific structure of the heald frame can also be designed differently, as long as it can realize the lifting function, and the present application does not limit this. The separation structure can be arranged on both sides of each heald frame in the transverse direction, and the present application does not limit this.

[0075] It should be noted that each of the heald frames can be fixed to the synchronous belt 22 through the synchronous belt group 2 and the comb plate,

[0076] Considering that the synchronous belt 22 may be loose with use, thereby affecting the lifting effect of the heald frame, in the present embodiment, please refer to Figure 6Each of the synchronous belt groups 2 further comprises at least two supporting rods 23 fixed to the frame 1 and around which the corresponding synchronous belt 22 is arranged to define a flat section arranged upwardly; the automatic heald raising mechanism 100 further comprises a plurality of tensioning assemblies 7, each of which comprises a fitting block 71 fixedly installed on the frame 1, a tensioning shaft 72, a tensioning wheel 73 and a tensioning screw 74, the tensioning shaft 72 is located above the corresponding flat section, the tensioning wheel 73 is sleeved on the tensioning shaft 72 and abuts against the flat section, at this time, the tensioning shaft 72 will not naturally fall due to the supporting action of the flat section, the tensioning screw 74 is threaded through the fitting block 71 to abut against the tensioning shaft 72, in the use process, the downward displacement amount of the tensioning screw 74 relative to the fitting block 71 is changed by rotating the tensioning screw 74, thereby controlling the tension of the tensioning wheel 73 on the flat section, so that the flat section is deformed to different degrees, thereby relying on the two supporting rods 23 to tension the entire synchronous belt 22.

[0077] Specifically, in the present embodiment, long strip holes extending upwardly and downwardly are arranged on the frame 1 for the tensioning shaft 72 to pass through, and each supporting rod 23 is fixed by shaft hole fitting.

[0078] Further, considering the size of the heald frame and the stability of the heald raising, each of the synchronous belt groups 2 comprises two transversely spaced synchronous belts 22, at this time, the fitting block 71, the tensioning wheel 73 and the tensioning screw 74 are correspondingly arranged two, i.e. two synchronous belts 22 correspond to the two ends of the wheel shaft 21, forming two flat sections, and two tensioning wheels 73 are arranged on the two flat sections.

[0079] Furthermore, the bottom of the frame 1 is provided with a plurality of supporting foot pads 13 arranged along the circumference thereof, and the height of each of the supporting foot pads 13 is adjustable. The supporting foot pad is composed of a foot pad and a foot pad nut, and the entire frame 1 is spliced by square tubes and steel plates.

[0080] In the embodiment of the present application, the rack 1 comprises a heald left side plate 11 and a heald right side plate 12 opposite in the transverse direction, the healds are located between the heald left side plate 11 and the heald right side plate 12, both ends of the wheel shaft 21 are arranged on the heald left side plate 11 and the heald right side plate 12 through bearings, two tensioning screws 74 are arranged on the heald left side plate 11 and the heald right side plate 12 to the two sides away from each other, the opposite sides of the heald left side plate 11 and the heald right side plate 12 are each provided with a long hole, a plurality of matching blocks 71 are arranged across the long hole in the up and down direction, both ends of the tensioning shaft 72 can be threaded out of the two long holes, each heald is pulled by two synchronous belts 22, the two synchronous belts 22 are limited between the heald left side plate 11 and the heald right side plate 12 by four supporting rods 23, the driving structure and the pneumatic mechanism 4 are arranged on the side of the heald left side plate 11 or the heald right side plate 12 away from each other, and the two supporting plates 52 are arranged side by side with the heald left side plate 11 and the heald right side plate 12.

[0081] The technical scheme of the application, the driving structure is composed of a servo motor 51, a motor 51 fixing seat and a shaft coupling, which is the power source of the whole heald lifting mechanism. The servo motor 51 drives a gear 531 transmission mechanism, which is composed of a plurality of gears and gear shafts 21. Through the meshing of the gears, the torque of the motor 51 is transmitted to each wheel shaft 21 to drive the upward movement of each heald frame. The pneumatic mechanism 4 is composed of an internal gas pressure controllable gas expansion shaft 41 and a buffer structure 42, and cooperates with a speed reducer 54, etc. The pneumatic mechanism 4 is used for controlling power transmission to realize the control of a single motor 51 on multiple heald frames. The controllable gas expansion shaft 41 is designed to control the power transmission, and when the load suddenly abnormally increases, the motor 51 will slip to protect the motor 51, and the size of the energy transmitted by each gas expansion shaft 41 can be controlled by controlling the air intake amount per unit time to realize the control of the lifting sequence of different heald frames, meet the needs of different weaving and different looms, and improve the universality of the heald lifting mechanism. The buffer structure 42 is designed to prevent the rapid increase of the load, which has a great impact on the service life of the motor 51, and can temporarily store adverse energy to protect the motor 51. Compared with the existing technology which uses a clutch to drive and control the structure, the improvement process of the present application is more gentle, the impact on the motor 51 is small, the stability of the equipment is higher, and the equipment runs more smoothly. With the cooperation of the gas expansion shaft 41 as the main protection and the buffer structure 42 for supplementary protection, the service life of the motor can be prolonged, and the speed reducer 54 reduces the speed and increases the torque. The heald lifting part is composed of heald frames, synchronous belts 22 and one-way dampers 6. The heald lifting height requirements of different fabrics are also different. The one-way damper 6 designed to be sleeved on the wheel shaft 21 is used to control the upper limit position of the heald frame and reduce the descending speed of the heald frame. The upper limit position can be adjusted according to different yarn types. The rotation frequency of the motor 51 and the thread cooperation state of the screw rod 611 driven by the steering wheel 61 can be reasonably controlled to realize stopping at any time, thereby limiting the heald lifting height and realizing stepless heald lifting, meeting the opening requirements of different fabric weaving without being affected by the heald lifting height and the need for separate design of the mechanism. The structure is simple, saves space, and is easy to install. The mechanism is simple and the production cost is low. A single servo motor 51 can control multiple heald frames individually, solving the contradiction between the number of motors 51 and the individual control of heald frames. Without reducing the heald lifting performance, the stability and service life of the equipment, a large amount of production cost is saved.

[0082] It should be noted that the position of the upper limit of the heald frame can be detected by a sensor. Compared with setting the motor pulse, the accuracy is better.

[0083] The above merely describes the preferred embodiments of the present application, and is not intended to limit the patent scope of the present application. Any equivalent structural changes made under the concept of the present application, or direct / indirect application in other related technical fields, using the content of the present application specification and drawings, are included in the patent protection scope of the present application.

Claims

1. An automatic heald lifting mechanism characterized by comprising: The utility model relates to a kind of pneumatic loom, including: Frame; Multiple synchronous belt groups, each of the synchronous belt groups includes wheel shaft and the synchronous belt of sleeve set to the outside of the wheel shaft, in multiple synchronous belt groups, multiple wheel shafts are spaced in up and down direction, so that multiple synchronous belts are nested in turn; Heddle frame structure, including multiple heddle frames respectively fixed on multiple synchronous belts, each of the heddle frames is arranged in longitudinal direction, to be able to move up and down with corresponding synchronous belt; Multiple pneumatic mechanisms, each of the pneumatic mechanisms includes gas expansion shaft and buffer structure, one end of the gas expansion shaft is connected with the buffer structure, and the friction of connection can be adjusted, the other end of the gas expansion shaft is connected with corresponding wheel shaft; Driving structure, including motor fixed to the frame, the main shaft of the motor extends along transverse direction and is drivingly connected with multiple buffer structures, to drive corresponding wheel shaft to rotate when the buffer structure and the gas expansion shaft are synchronously rotated when the motor rotates, so that the synchronous belt moves up and down; The side of each buffer structure away from the motor is formed with mounting groove; Each of the gas expansion shafts includes: Shaft cylinder, the shaft cylinder has inner cavity for storing gas, one end of the shaft cylinder extends into the mounting groove, and the peripheral surface of end portion is provided with multiple through holes distributed at intervals, the other end is connected with corresponding wheel shaft, the peripheral surface of the shaft cylinder also has multiple gas inlets distributed along the axial direction thereof, multiple gas inlets and multiple through holes are spaced along the length direction of the shaft cylinder; Gas connection ring, sleeve set to the outside of the shaft cylinder, and can be relatively rotated with the shaft cylinder, the gas connection ring covers the outside of multiple gas inlets, the gas connection ring is provided with gas connection hole, the gas connection hole is used for mounting gas valve communicated with external gas pipe, when the shaft cylinder is driven to rotate, the gas connection hole is always communicated with at least one gas inlet, to be able to introduce gas into the inner cavity; Multiple pneumatic terminals are respectively arranged at multiple through holes, and are movably sealed with the shaft cylinder, multiple pneumatic terminals are used to protrude from the shaft cylinder to contact with the side wall of the mounting groove when the gas pressure in the shaft cylinder changes, or are accommodated in the inner cavity; Each of the buffer structures includes: Passive gas pusher, arranged in a cylindrical shape with one side open, the bottom wall of the passive gas pusher is provided with baffle in middle part, one end of the baffle is abutted against the wall surface of the passive gas pusher, the other end is arranged in a columnar shape to form positioning column, annular groove is arranged on the peripheral surface of the passive gas pusher close to the open side, to sleeve-mount sealing ring; The active thrust member is arranged in a cylinder shape with one side open, is sleeved outside the passive air thrust member, and is sealed and matched with the passive air thrust member through the sealing ring to form a sealed cavity. The bottom wall of the active thrust member is provided with a vane, and the vane can extend into the passive air thrust member. One end of the vane along the diameter direction of the active thrust member is in contact with the inner wall of the passive air thrust member, and the other end is arranged in an arc surface to be in contact with the positioning column. The active thrust member is drivingly connected with the motor, so that the vane can rotate around the positioning column to extrude the air in the sealed cavity during rotation of the active thrust member, so that the passive air thrust member can move with the active thrust member.

2. The automatic heald lifting mechanism according to claim 1, characterized in that, The middle part of the shaft cylinder is provided with an annular groove, and a plurality of air inlet holes are arranged on the bottom wall surface of the annular groove; The air inlet ring is clamped in the annular groove.

3. The automatic heald lifting mechanism according to claim 1, wherein The driving structure further comprises: two support plates are arranged on the rack in a transverse direction; and a gear set is located between the two support plates, the gear set comprises a plurality of driving gears and a plurality of reversing gears which are arranged alternately and meshed with each other, one end of the plurality of driving gears is connected to the plurality of buffering structures through a speed reducer, the other end of the gear shaft of one of the driving gears is connected with the main shaft of the motor through the support plate, the gear shafts of the plurality of reversing gears are rotatably installed on the two support plates respectively, and the plurality of speed reducers are fixed to the other support plate.

4. The automatic heald lifting mechanism according to claim 1, wherein The automatic heald lifting structure further comprises a plurality of one-way dampers, the plurality of one-way dampers are matched with the plurality of wheel shafts, and are used for fixing and controlling the upper limit of each heald and the speed of each heald descending.

5. The automatic heald lifting mechanism according to claim 4, wherein Each one-way damper comprises: a steering engine is fixed to the rack, and a threaded rod is connected to the end of the main shaft of the steering engine; a connecting ring is provided with a sawtooth-shaped hole in the inner hole; a friction ring is sleeved outside the connecting ring, and a strip-shaped hole is formed in the friction ring, so that the connecting ring can be tightly gripped or loosened when being threadedly connected with the threaded rod; and a damper sawtooth ring is sleeved and fixed outside the corresponding wheel shaft and is arranged in the inner hole of the connecting ring, the tooth part of the damper sawtooth ring is arranged in an inclined manner and is made of a material capable of being elastically deformed, so that the damper sawtooth ring can rotate synchronously with the connecting ring or rotate oppositely with the connecting ring during rotation of the wheel shaft.

6. The automatic heald lifting mechanism according to claim 1, wherein Each heald comprises: a frame body is fixed to the synchronous belt; two heald fixing members are arranged on the upper and lower sides of the frame body, and are used for winding healds; a heald limiting block is fixed to the rack and located below the frame body, and is used for limiting the downward movement of the frame body; a separation structure comprises two separation blocks located on the longitudinal sides of the frame body, and the opposite sides of the two separation blocks are provided with a plurality of clamping grooves, each clamping groove is provided with a roller which can rotate along the axis extending in the transverse direction, each roller is in contact with the corresponding side of the frame body, and rotates with the frame body when the frame body is driven to move.

7. The automatic heald lifting mechanism according to claim 1, wherein Each of the synchronous belt groups further comprises at least two supporting rods fixed to the frame and around which the corresponding synchronous belt is arranged to define an upwardly arranged flat section on the corresponding synchronous belt; The automatic heald lifting mechanism further comprises a plurality of tensioning assemblies, each of which comprises: a matching block fixedly installed on the frame; a tensioning screw threaded through the matching block; and a tensioning shaft located above the corresponding flat section, an outer portion of the tensioning shaft being sleeved with a tensioning wheel to abut against the flat section, an end portion of the tensioning shaft being located below the matching block and being capable of contacting an end portion of the tensioning screw to be driven downwardly to press the tensioning shaft against the synchronous belt when the tensioning screw is tightened downwardly.

8. The automatic heald lifting mechanism according to claim 7, wherein Each of the synchronous belt groups comprises two transversely spaced synchronous belts, and the matching block, the tensioning wheel and the tensioning screw are correspondingly arranged for the two synchronous belts; and / or The bottom of the frame is provided with a plurality of support foot pads arranged at intervals in the circumferential direction of the frame, and the height of each of the support foot pads is adjustable.

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