Electromagnetic shuttle pushing and weft insertion device for heavy shuttle loom of sisal hemp

Abstract

The invention discloses an electromagnetic shuttle-pushing weft insertion device for a heavy shuttle loom of sisal hemp. The electromagnetic shuttle-pushing weft insertion device comprises a sley, a shuttle-pushing mechanism and a buffer mechanism, the shuttle pushing mechanism comprises a shuttle pushing ring and a coreless linear motor; the shuttle pushing ring comprises a circular ring I and a connecting piece I; the buffer mechanism comprises a blocking head and an air pressure buffer mechanism; the air pressure buffering mechanism comprises an automatic telescopic take-up device, an air cylinder, an air pressure reducing valve and a one-way valve. The one-way valve is used for unidirectionally communicating the outside with the cylinder; the air pressure reducing valve is used for balancing air pressure generated by compressed air in the air cylinder by the piston when the piston rod extends into the air cylinder, so that the piston performs decelerated motion at a constant accelerated speed; the automatic telescopic take-up device comprises a take-up box and a contraction line. Kinetic energy of the shuttle is stably obtained in the shuttle pushing process, kinetic energy of the shuttle is slowly dissipated in the shuttle manufacturing process, vibration and noise of a machine can be reduced, and meanwhile negative effects on the acceleration process of the shuttle in the weft insertion process are avoided.

Description

Technical Field

[0001] The invention belongs to the technical field of textile machinery and relates to an electromagnetic shuttle pushing and weft insertion device for a sisal heavy shuttle loom. Background Art

[0002] At present, the weft insertion process of the common sisal heavy shuttle loom is mainly through the shuttle mechanism on the loom hitting the shuttle to accelerate the shuttle, and the shuttle is separated from the shuttle mechanism after acceleration, and reaches the shuttle box on the opposite side after passing through the shed, and is affected by the shuttle control device at the same time, and stops in the shuttle box on the opposite side after collision and friction, completing the first weft insertion. When the next weft is inserted, the shuttle is launched into the shed by the shuttle mechanism on the opposite side, and when the shuttle returns to the shuttle box on this side, it is affected by the shuttle control device and stops in the shuttle box on this side, completing the second weft insertion, and the process is repeated continuously.

[0003] The shuttle throwing mechanism of the common sisal heavy shuttle loom is a cam-type shuttle throwing mechanism. Due to the limitations of its own structural characteristics, the shuttle throwing process of this shuttle throwing mechanism can be roughly regarded as the rigid collision between the shuttle rod and the shuttle, which causes the shuttle throwing mechanism to generate huge impact vibration and noise during the shuttle throwing process. At the same time, the shuttle making process also uses impact to absorb kinetic energy, which makes the machine have vibration and noise problems in the overall operation, and these vibrations further affect the reliability of the mechanism and the life of the parts. In addition, in the second stage of shuttle making, the spring compression friction shuttle making mechanism in the shuttle throwing mechanism cannot be controlled autonomously, so the shuttle throwing mechanism will cause the shuttle to bear the burden of a higher initial velocity due to friction when the shuttle is struck and the weft is inserted.

[0004] In view of the inherent defects of the cam-type shuttle mechanism, such as large impact, loud noise and easy damage, the prior art has tried to push the shuttle through a hydraulic cylinder. For example, the hydraulic shuttle system of a wide and heavy loom disclosed in patent CN101705572A uses a piston installed in an oil cylinder to push the shuttle, but this technology is prone to oil leakage, and the shuttle mechanism generates pressure through the flow of liquid to drive the shuttle to move, and the flow of liquid is slow, so its maximum speed is also slow, and the operating speed is limited.

[0005] Patent CN85204084U discloses a linear motor that drives the shuttle to insert the weft. This patent uses a mechanical synchronizer to synchronize the motor for reverse thrust when making the shuttle. When the device is making the shuttle, the shuttle will be squeezed after entering the shuttle box, resulting in an increase in the positive pressure between the shuttle box and the shuttle, thereby generating greater friction. Since the positive pressure increased in this way cannot distinguish between pushing the shuttle and making the shuttle, and cannot be adjusted in a targeted manner, a large positive pressure needs to be maintained throughout the process to ensure sufficient friction. Therefore, there will be a large friction in both the shuttle pushing and shuttle making stages, and the friction generated when pushing the shuttle will affect the acceleration of the shuttle. In addition, the kinetic energy dissipation of the buffer mechanism is unstable when making the shuttle, and there is a lot of noise.

[0006] Therefore, it is of great significance to study an electromagnetic shuttle weft insertion device for sisal heavy shuttle loom to solve the above problems. Summary of the invention

[0007] The purpose of the invention is to solve the problems existing in the prior art and to provide an electromagnetic shuttle pushing and weft insertion device for a sisal heavy shuttle loom.

[0008] To achieve the above object, the technical solution adopted by the present invention is as follows:

[0009] An electromagnetic shuttle weft insertion device for a heavy shuttle loom for sisal hemp, the shuttle comprising a shuttle body and two shuttle tips, the two shuttle tips being respectively located on both sides of the shuttle body and fixedly connected to the shuttle body, the tips of the two shuttle tips facing each other, comprising a sley, a shuttle pushing mechanism and a buffer mechanism;

[0010] The sley includes an upper horizontal plate, a lower horizontal plate and a vertical plate; the upper horizontal plate and the lower horizontal plate are fixedly connected by the vertical plate; a long strip through hole is provided on the upper horizontal plate;

[0011] The shuttle push mechanism includes a shuttle push ring and an ironless linear motor;

[0012] The push shuttle ring includes a circular ring I and a connecting member I; the circular ring I is placed vertically; the connecting member I is located below the circular ring I and is fixedly connected to the circular ring I;

[0013] The ironless linear motor is located between the upper horizontal plate and the lower horizontal plate, and is fixedly connected to the lower horizontal plate;

[0014] The push shuttle ring is placed vertically and arranged above the sley; the connecting member I passes through the long strip through hole and is fixedly connected to the coreless linear motor, and the coreless linear motor is used to push the push shuttle ring to move in the length direction of the long strip through hole, and the moving distance is less than or equal to the length of the long strip through hole; after the coreless linear motor pushes the push shuttle ring, it automatically resets, which is the prior art;

[0015] The buffer mechanism includes an arresting head and a gas pressure buffer mechanism;

[0016] The blocking head is used to block the shuttle and moves on the upper surface of the upper horizontal plate after blocking the shuttle; the blocking head includes a ring II and a slider I; the ring II is placed vertically; the slider I is located below the ring II and is fixedly connected to the ring II;

[0017] The upper surface of the upper horizontal plate is provided with an intercepting head guide groove, and the intercepting head cooperates with the intercepting head guide groove through the slider I to limit the moving direction of the intercepting head, and the moving direction is the length direction of the long strip through hole;

[0018] The air pressure buffer mechanism includes an automatic telescopic wire take-up device, an air cylinder, an air pressure reducing valve and a one-way valve;

[0019] The cylinder is located on the upper surface of the upper horizontal plate, and the movement direction of the piston rod in the cylinder is the length direction of the long strip through hole; the air pressure reducing valve and the one-way valve are arranged on the cylinder; the one-way valve is used to connect the outside world and the inside of the cylinder in one direction, and the one-way connection means that the gas can only enter the inside of the cylinder from the outside, so that when the piston rod extends out of the cylinder, it will not be resisted by the pressure difference; the air pressure reducing valve is used to balance the air pressure generated by the piston in the cylinder when the piston rod extends into the cylinder, so that the piston decelerates at a constant acceleration; the air pressure reducing valve can control the air pressure in the cylinder to maintain the set size by controlling the opening of its valve, thereby making the pressure difference between the inside and outside of the cylinder constant, and at this time the resistance of the piston rod to the blocking head is constant, so the shuttle will decelerate at a constant deceleration acceleration, and it can be adjusted by itself as long as the required air pressure is set;

[0020] The one-way valve and the air pressure reducing valve in the present invention are used in combination. When the shuttle is made, the one-way valve is closed and the air pressure reducing valve is opened to maintain a constant air pressure in the cylinder. When the shuttle is pushed, the one-way valve and the air pressure reducing valve are opened at the same time to maintain the air pressure balance inside and outside the cylinder, thereby preventing the air pressure difference inside and outside the cylinder from being generated during the piston reset process, thereby causing a greater negative impact on the reset speed.

[0021] The automatic telescopic wire take-up device includes a wire take-up box and a retractable wire. The retractable wire is wound on a spring. One end of the retractable wire is fixed in the wire take-up box through the spring. The other end of the retractable wire is exposed outside the wire take-up box (the other end of the retractable wire is a free end). The automatic telescopic wire take-up device is a prior art device. The retractable wire can be pulled out under the action of an external force. After the external force disappears, the retractable wire retracts into the wire take-up box. The wire take-up box is fixed on a piston rod. The free end of the retractable wire is fixedly connected to the blocking head.

[0022] When the coreless linear motor does not push the shuttle push ring, the blocking head is located on the motion trajectory of the shuttle push ring, the shuttle is on the side of the blocking head away from the shuttle push ring, and one shuttle tip of the shuttle passes through the circular ring II of the blocking head.

[0023] The shuttle pushing process is as follows: the ironless linear motor pushes the shuttle push ring, and the shuttle push ring touches the blocking head. Under the thrust of the shuttle push ring, the blocking head moves along the length direction of the long strip through hole on the upper surface of the sley (i.e., the upper surface of the upper horizontal plate) (at this time, the blocking head pushes the shuttle to move and pushes the shuttle to a predetermined speed). During the movement and the acceleration of the shuttle push, the shuttle push ring drives the blocking head to accelerate the shuttle to a predetermined speed and extend the contraction line. After that, the shuttle continues to move on the sley without force. At this time, the contraction line reaches the limit length, and the shuttle push ring enters the deceleration stage to drive the blocking head to pull out the piston rod of the cylinder. When the blocking head loses kinetic energy, under the action of the contraction line, the blocking head is pulled to the free end of the piston rod and waits for the shuttle to be made. Among them, due to the presence of the one-way valve, during the shuttle pushing process, the negative effect of the air pressure buffer mechanism on the acceleration of the shuttle is very small.

[0024] The shuttle making process is as follows: after the shuttle hits the blocking head, the blocking head intercepts the shuttle. During the interception, the tip of the shuttle is inserted from one side of the ring II to the other side, and then under the action of the air pressure buffer mechanism (the pulled out piston rod retracts into the cylinder under the action of the shuttle), the shuttle performs a deceleration motion; wherein, due to the presence of the air pressure reducing valve, the air pressure in the cylinder is kept stable, thereby providing a stable resistance, so that the piston performs a deceleration motion at a constant acceleration (that is, the shuttle performs a deceleration motion at a constant acceleration); the present invention makes the dissipation of the kinetic energy of the shuttle more stable and reduces the shuttle making noise through the setting of the air pressure buffer mechanism.

[0025] As the preferred technical solution:

[0026] As described above, in an electromagnetic shuttle pushing and weft insertion device for a sisal heavy shuttle loom, the number of the blocking head guide groove and the slider I are both 2, and a guide groove baffle is provided above each blocking head guide groove. The guide groove baffle is used to cooperate with the blocking head guide groove to limit the slider I in the blocking head guide groove, thereby preventing the blocking head from disengaging from the guide groove during movement and changing the direction of movement.

[0027] As described above, an electromagnetic shuttle pushing and weft insertion device for a sisal heavy shuttle loom is provided with rollers on both sides of a slider I along the length direction of the long strip through hole, the lowest point of the rollers is lower than the bottom of the slider I, and the slider I is connected to the blocking head guide groove through rollers. The provision of rollers can reduce displacement friction.

[0028] As described above, in the electromagnetic shuttle pushing and weft insertion device for a sisal heavy shuttle loom, the coreless linear motor includes a slider II. Specifically, the motor generates an alternating magnetic field when energized to drive the slider II to move, and the slider II is the mover.

[0029] As described above, an electromagnetic shuttle weft insertion device for a sisal heavy shuttle loom, the shuttle pushing mechanism also includes a cover plate and a shuttle pushing connector;

[0030] Along the horizontal direction, the connecting member I is provided with a through hole A;

[0031] The push shuttle connector is a horizontal plate; the lower surface of the push shuttle connector is fixedly connected to the upper surface of the slider II; a blind hole is provided on the upper surface of the push shuttle connector; the connector I passes through the long strip through hole and is inserted into the blind hole of the push shuttle connector; the cover plate passes through the through hole A and is connected to the push shuttle connector by bolts to fix the push shuttle ring to the push shuttle connector; wherein, when the connector I is inserted into the blind hole of the push shuttle connector, the distance between the bottom of the through hole A of the connector I and the bottom of the blind hole is the depth of the blind hole.

[0032] As described above, the electromagnetic shuttle weft insertion device for a heavy shuttle loom for sisal hemp, the buffer mechanism also includes a hydraulic buffer mechanism; the hydraulic buffer mechanism includes a buffer platform, an optical axis screw, an assembly, a spring and a hydraulic buffer, and the hydraulic buffer is a prior art;

[0033] The assembly is a closed hollow cubic structure; the hydraulic buffer is horizontally placed inside the assembly and fixedly connected to the assembly; one side of the assembly is marked as side A, and through holes B and through holes C are provided on side A; through holes B and through holes C both connect the outside and the inside of the assembly; the piston rod of the hydraulic buffer passes through through hole B, so that the piston is exposed from the assembly;

[0034] The buffer platform is provided with a groove and a tapped hole; the piston is inserted into the groove and has an interference fit with the groove, so that the piston is fixedly connected to the buffer platform; one end of the optical axis screw is inserted into the tapped hole and is fixedly connected to the buffer platform, and the other end of the optical axis screw passes through the through hole C and is inserted into the interior of the assembly, and the optical axis screw and the through hole C have a clearance fit; the vertical projection of the optical axis screw on the side A has no contact with the vertical projection of the hydraulic buffer on the side A;

[0035] The spring is sleeved on the optical axis screw, one end of the spring is fixedly connected to the buffer platform, and the other end is fixedly connected to the side A; the length direction of the spring is the same as the length direction of the long strip through hole;

[0036] The hydraulic buffer mechanism is arranged on the upper surface of the upper horizontal plate and is fixedly connected to the upper horizontal plate through an assembly. The hydraulic buffer mechanism is located on the side of the push shuttle ring away from the blocking head. When the coreless linear motor does not push the push shuttle ring, the buffer platform fits with the push shuttle ring. By arranging the hydraulic buffer mechanism, the length of the piston rod in the pneumatic buffer mechanism can be reduced.

[0037] After being decelerated by the pneumatic buffer mechanism, the shuttle contacts the buffer platform, driving the buffer platform to move toward the assembly (because the other end of the optical axis screw passes through the through hole C and is inserted into the interior of the assembly, the optical axis screw and the through hole C have a clearance fit, so the buffer platform can move). At this time, the spring and hydraulic buffer are compressed at the same time to absorb kinetic energy to reduce the speed of the shuttle.

[0038] In the electromagnetic shuttle weft insertion device for a sisal heavy shuttle loom as described above, a polyurethane buffer pad is provided on the surface where the buffer platform and the shuttle push ring are in contact, so as to further buffer the shuttle.

[0039] As described above, in an electromagnetic shuttle pushing and weft insertion device for a sisal heavy shuttle loom, the upper horizontal plate and the lower horizontal plate are rectangular plates, and the vertical projections of the upper horizontal plate and the lower horizontal plate on the horizontal plane coincide; the length direction of the long strip through hole is the same as the length direction of the upper horizontal plate.

[0040] As described above, in an electromagnetic shuttle push-shuttle weft insertion device for a sisal heavy shuttle loom, the number of the pneumatic buffer mechanisms in the buffer mechanism is 2, which are respectively denoted as pneumatic buffer mechanism I and pneumatic buffer mechanism II; the pneumatic buffer mechanism I and the pneumatic buffer mechanism II are arranged along the width direction of the upper horizontal plate; and the hydraulic buffer mechanism is located between the pneumatic buffer mechanism I and the pneumatic buffer mechanism II.

[0041] As described above, in the electromagnetic shuttle pushing and weft insertion device for a sisal heavy shuttle loom, the number of the shuttle pushing mechanisms and the buffer mechanisms are both 2, and the 2 shuttle pushing mechanisms and the 2 buffer mechanisms are symmetrically distributed on the sley; during use, one of the shuttle pushing mechanisms and the buffer mechanism is in a shuttle pushing state, and the other shuttle pushing mechanism and the buffer mechanism is in a shuttle making state.

[0042] Beneficial effects:

[0043] The present invention uses an iron-coreless linear motor to push the shuttle and insert the weft, and simultaneously uses a pneumatic buffer mechanism and a hydraulic buffer mechanism to cooperate with each other to make the shuttle and reduce the speed of the shuttle, thereby overcoming the shortcomings of the prior art, and also making the kinetic energy acquisition of the shuttle more stable during the shuttle pushing process, and the kinetic energy dissipation of the shuttle more gradual during the shuttle making process, thereby reducing the vibration and noise of the machine, and at the same time having no negative impact on the acceleration process of the shuttle during the weft insertion process. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] Figure 1 It is a schematic diagram of the overall structure of the electromagnetic shuttle weft insertion device for a sisal heavy shuttle loom of the present invention;

[0045] Figure 2 It is a partial structural schematic diagram of the electromagnetic shuttle weft insertion device for a sisal heavy shuttle loom of the present invention;

[0046] Figure 3 It is a schematic diagram of the blocking head of the present invention;

[0047] Figure 4 It is a schematic diagram of the shuttle push ring of the present invention;

[0048] Figure 5 It is a schematic diagram of the piston and the wire take-up box fixing member of the present invention;

[0049] Figure 6 Schematic diagram of the air pressure buffer mechanism of the present invention; in the figure, a is a schematic diagram of the single-side air pressure buffer mechanism, and b is a schematic diagram of the air pressure buffer mechanism and the blocking head being installed and fixed;

[0050] Figure 7 Schematic diagram of the hydraulic buffer mechanism of the present invention; in the figure, a is a schematic diagram of the overall structure of the hydraulic buffer mechanism, b is a schematic diagram of the inside of the hydraulic buffer assembly, c is a top view of the inside of the hydraulic buffer assembly, and d is a schematic diagram of the structure of the buffer platform and the baffle on the assembly shell;

[0051] Figure 8 Schematic diagram of the shuttle pushing process of the present invention; in the figure, a is a schematic diagram of the positions of various components when the shuttle pushing starts, b is a schematic diagram of the positions of various components during the operation of the shuttle pushing, and c is a schematic diagram of the positions of various components when the blocking head reaches the top and starts to reset;

[0052] Fig. 9 Schematic diagram of the shuttle making process of the present invention; in the figure, a is a schematic diagram of the positions of the various components at the beginning of shuttle making, and b is a schematic diagram of the positions of the various components when shuttle making is completed;

[0053] Fig.10 It is a schematic diagram of the positions of the guide groove baffle, the blocking head guide groove and the blocking head of the present invention;

[0054] Fig.11 It is a top view of the push shuttle ring and the push shuttle connector of the present invention;

[0055] Fig.12 It is a schematic diagram of the slider II and the push shuttle connector of the present invention;

[0056] Fig.13 It is a left side view of the push shuttle ring and the push shuttle connector of the present invention;

[0057] Among them, 1-blocking head, 2-roller, 3-piston rod, 4-winding box, 5-cylinder, 6-air pressure reducing valve, 7-check valve, 8-buffer platform, 9-spring, 10-hydraulic buffer, 11-push shuttle ring, 12-ironless linear motor, 13-long through hole, 14-blocking head guide groove, 15-guide groove baffle, 16-piston and winder box fixing, 17-retraction line, 18-shuttle, 19-cover plate, 20-push shuttle connector, 21-slider II. DETAILED DESCRIPTION

[0058] The present invention will be further described below in conjunction with specific embodiments. It should be understood that these embodiments are only used to illustrate the present invention and are not intended to limit the scope of the present invention. In addition, it should be understood that after reading the content taught by the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms fall within the scope limited by the appended claims of the application equally.

[0059] The shuttle comprises a shuttle body and two shuttle tips, the two shuttle tips are respectively located on both sides of the shuttle body and are fixedly connected to the shuttle body, and the tips of the two shuttle tips are opposite to each other;

[0060] like Figure 1 , Figure 2 As shown, an electromagnetic shuttle weft insertion device for a sisal heavy shuttle loom comprises a sley, a shuttle push mechanism and a buffer mechanism;

[0061] The sley includes an upper horizontal plate, a lower horizontal plate and a vertical plate; the upper horizontal plate and the lower horizontal plate are rectangular plates, and the vertical projections of the upper horizontal plate and the lower horizontal plate on the horizontal plane coincide; the upper horizontal plate and the lower horizontal plate are fixedly connected by the vertical plate; a long strip through hole 13 is provided on the upper horizontal plate; the length direction of the long strip through hole 13 is the same as the length direction of the upper horizontal plate;

[0062] The number of the push shuttle mechanism and the number of the buffer mechanism are both 2, and the 2 push shuttle mechanisms and the 2 buffer mechanisms are symmetrically distributed on the sley;

[0063] The push shuttle mechanism includes a push shuttle ring 11, an ironless linear motor 12, a cover plate 19 and a push shuttle connector 20;

[0064] like Figure 1 , Figure 4 As shown, the push shuttle ring 11 is arranged above the sley; the push shuttle ring 11 includes a ring I and a connecting member I; the ring I is placed vertically; the connecting member I is located below the ring I and is fixedly connected to the ring I; along the horizontal direction, a through hole A is provided on the connecting member I;

[0065] The coreless linear motor 12 is located between the upper horizontal plate and the lower horizontal plate, and is fixedly connected to the lower horizontal plate;

[0066] The ironless linear motor 12 includes a slider II 21;

[0067] like Figure 1 , Figure 11 to Figure 13 As shown, the push shuttle connector 20 is a horizontal plate; the upper surface of the push shuttle connector 20 is provided with a blind hole; the lower surface of the push shuttle connector 20 is fixedly connected to the upper surface of the slider II 21;

[0068] The connector I passes through the long strip through hole 13 and is inserted into the blind hole of the push shuttle connector 20. The cover plate 19 passes through the through hole A and is connected to the push shuttle connector 20 by bolts to fix the push shuttle ring 11 to the push shuttle connector 20. When the connector I is inserted into the blind hole of the push shuttle connector 20, the distance between the bottom of the through hole A of the connector I and the bottom of the blind hole is the depth of the blind hole.

[0069] The coreless linear motor 12 is used to push the shuttle ring 11 to move in the length direction of the long strip through hole 13, and the moving distance is less than or equal to the length of the long strip through hole 13;

[0070] like Figure 1 , Figure 3 As shown, the buffer mechanism includes an arresting head 1, a pneumatic buffer mechanism and a hydraulic buffer mechanism;

[0071] The blocking head 1 is used to block the shuttle and moves on the upper surface of the upper horizontal plate after blocking the shuttle;

[0072] The arresting head 1 includes a ring II and two sliders I; the ring II is placed vertically; the two sliders I are both located below the ring II and are fixedly connected to the ring II;

[0073] like Figure 2 , Fig.10 As shown, two blocking head guide grooves 14 are provided on the upper surface of the upper horizontal plate; the blocking head 1 is limited in the moving direction of the blocking head 1 by the cooperation of the slider 1 with the blocking head guide groove 14, and the moving direction is the length direction of the long strip through hole 13; a guide groove baffle 15 is provided above each blocking head guide groove 14, and the guide groove baffle 15 is used to cooperate with the blocking head guide groove 14 to limit the slider 1 in the blocking head guide groove 14;

[0074] Along the length direction of the long strip through hole 13, rollers 2 are provided on both sides of the slider 1, the lowest point of the rollers 2 is lower than the bottom of the slider 1, and the slider 1 is rollingly connected with the blocking head guide groove 14 through the rollers 2;

[0075] The number of the air pressure buffer mechanisms is 2, which are respectively denoted as air pressure buffer mechanism I and air pressure buffer mechanism II; the air pressure buffer mechanism I and the air pressure buffer mechanism II are arranged along the width direction of the upper horizontal plate; the hydraulic buffer mechanism is located between the air pressure buffer mechanism I and the air pressure buffer mechanism II;

[0076] like Figure 5 , Figure 6 As shown, the air pressure buffer mechanism includes an automatic telescopic take-up device, a cylinder 5, an air pressure reducing valve 6 and a one-way valve 7;

[0077] The cylinder 5 is located on the upper surface of the upper horizontal plate, and the movement direction of the piston rod 3 in the cylinder 5 is the length direction of the long strip through hole 13;

[0078] The air pressure reducing valve 6 and the one-way valve 7 are arranged on the cylinder 5; the one-way valve 7 is used to connect the outside world and the inside of the cylinder 5 in one direction, and the one-way connection means that the gas can only enter the inside of the cylinder 5 from the outside; the air pressure reducing valve 6 is used to balance the air pressure generated by the piston in the cylinder 5 when the piston rod 3 extends into the cylinder 5, so that the piston decelerates at a constant acceleration;

[0079] The automatic telescopic wire take-up device includes a wire take-up box 4 and a retractable wire; one end of the retractable wire 17 is fixed in the wire take-up box 4 by a spring, and the other end of the retractable wire 17 is exposed outside the wire take-up box 4; the wire take-up box 4 is fixed to the piston rod 3 by a wire take-up box fixing member 16 and a bolt, and the free end of the retractable wire is fixedly connected to the blocking head 1;

[0080] like Figure 8 As shown in (a), when the coreless linear motor 12 does not push the shuttle ring 11, the blocking head 1 is located on the motion trajectory of the shuttle ring 11, the shuttle is on the side of the blocking head 1 away from the shuttle ring 11, and one shuttle tip of the shuttle passes through the ring II of the blocking head 1;

[0081] like Figure 7 , Figure 8 As shown, the hydraulic buffer mechanism includes a buffer platform 8, an optical axis screw, an assembly, a spring 9 and a hydraulic buffer 10;

[0082] The assembly is a closed hollow cubic structure; the hydraulic buffer 10 is horizontally placed inside the assembly and fixedly connected to the assembly; one side of the assembly is marked as side A, and side A is provided with through holes B and through holes C; through holes B and through holes C both connect the outside and the inside of the assembly; the piston rod of the hydraulic buffer 10 passes through through hole B, so that the piston is exposed from the assembly;

[0083] The buffer platform 8 is provided with a groove and a tapped hole; the piston is inserted into the groove and has an interference fit with the groove; one end of the optical axis screw is inserted into the tapped hole and fixedly connected to the buffer platform 8, and the other end of the optical axis screw is inserted into the interior of the assembly through the through hole C, and the optical axis screw and the through hole C have a clearance fit; the vertical projection of the optical axis screw on the side A has no contact with the vertical projection of the hydraulic buffer 10 on the side A;

[0084] The spring 9 is sleeved on the optical axis screw, one end of the spring is fixedly connected to the buffer platform 8, and the other end is fixedly connected to the side surface A; the length direction of the spring is the same as the length direction of the long strip through hole 13;

[0085] The hydraulic buffer mechanism is arranged on the upper surface of the upper horizontal plate and is fixedly connected to the upper horizontal plate through an assembly. The hydraulic buffer mechanism is located on the side of the push shuttle ring 11 away from the blocking head 1; Figure 8 As shown in (a), when the coreless linear motor 12 does not push the push shuttle ring 11, the polyurethane buffer gasket on the buffer platform 8 fits with the push shuttle ring 11; a polyurethane buffer gasket is provided on the surface where the buffer platform 8 fits with the push shuttle ring 11.

[0086] The use process of the above device is as follows: when the above device is used for weft insertion, when one of the shuttle pushing mechanism and the buffer mechanism is in the shuttle pushing state, the other shuttle pushing mechanism and the buffer mechanism will be in the shuttle making state;

[0087] like Figure 8As shown, during the shuttle pushing process, the coreless linear motor pushes the shuttle pushing ring so that the shuttle pushing ring touches the blocking head, and the blocking head moves on the upper surface of the sley along the length direction of the long strip through hole under the thrust of the shuttle pushing ring (at this time, the blocking head pushes the shuttle to move and pushes the shuttle to a predetermined speed). During this process, the shuttle pushing ring drives the blocking head to accelerate the shuttle to a predetermined speed and extend the contraction line, and then the shuttle continues to move along the length direction of the upper horizontal plate under the action of inertia; when the contraction line reaches the limit length, the shuttle pushing ring will also enter the deceleration stage, and drive the blocking head to pull out the piston rod of the cylinder. When the blocking head loses kinetic energy, under the action of the contraction line, the blocking head is pulled to the free end of the piston rod, waiting for the shuttle to be controlled;

[0088] like Fig. 9 As shown, the pushed out shuttle hits the blocking head on the other side under the action of inertia and is intercepted by the blocking head. During the interception, the tip of the shuttle is inserted from one side of the ring II to the other side, and then under the action of the hydraulic buffer mechanism and the pneumatic buffer mechanism (the pulled out piston rod retracts into the cylinder under the action of the shuttle), the kinetic energy of the shuttle is compressed and absorbed to reduce the speed of the shuttle; wherein, due to the presence of the air pressure reducing valve, the air pressure in the cylinder is kept stable, thereby providing stable resistance, so that the piston decelerates at a constant acceleration (that is, the shuttle decelerates at a constant acceleration); when the shuttle making process is completed, the state of this side will change from the shuttle making state to the shuttle pushing state, and the other side will be in the shuttle making state, and this can be repeated to continuously insert the weft.

Claims

1. An electromagnetic shuttle weft insertion device for a heavy shuttle loom for sisal hemp, characterized in that: It includes a sley, a shuttle push mechanism and a buffer mechanism; The sley includes an upper horizontal plate, a lower horizontal plate and a vertical plate; the upper horizontal plate and the lower horizontal plate are fixedly connected by the vertical plate; a long strip through hole is provided on the upper horizontal plate; The shuttle push mechanism comprises a shuttle push ring (11) and an iron coreless linear motor (12); The push shuttle ring (11) comprises a circular ring I and a connecting member I; the circular ring I is placed vertically; the connecting member I is located below the circular ring I and is fixedly connected to the circular ring I; The coreless linear motor (12) is located between the upper horizontal plate and the lower horizontal plate, and is fixedly connected to the lower horizontal plate; The push shuttle ring (11) is arranged above the sley; the connecting member I passes through the long strip through hole and is fixedly connected to the coreless linear motor (12), and the coreless linear motor (12) is used to push the push shuttle ring (11) to move in the length direction of the long strip through hole, and the moving distance is less than or equal to the length of the long strip through hole; The buffer mechanism comprises a blocking head (1) and a pneumatic buffer mechanism; The blocking head (1) is used to block the shuttle and moves on the upper surface of the upper horizontal plate after blocking the shuttle; the blocking head (1) comprises a ring II and a slider I; the ring II is placed vertically; the slider I is located below the ring II and is fixedly connected to the ring II; The upper surface of the upper horizontal plate is provided with an intercepting head guide groove (14), and the intercepting head (1) is limited in the moving direction of the intercepting head (1) by the cooperation between the slider I and the intercepting head guide groove (14), and the moving direction is the length direction of the long strip through hole; The air pressure buffer mechanism comprises an automatic telescopic wire take-up device, an air cylinder (5), an air pressure reducing valve (6) and a one-way valve (7); The cylinder (5) is located on the upper surface of the upper horizontal plate, and the movement direction of the piston rod (3) in the cylinder (5) is the length direction of the long strip through hole; the air pressure reducing valve (6) and the one-way valve (7) are arranged on the cylinder (5); the one-way valve (7) is used for one-way connection between the outside and the inside of the cylinder (5), and the one-way connection means that the gas can only enter the inside of the cylinder (5) from the outside; the air pressure reducing valve (6) is used to balance the air pressure generated by the piston in the cylinder (5) when the piston rod (3) extends into the cylinder (5), so that the piston decelerates at a constant acceleration; The automatic telescopic wire take-up device comprises a wire take-up box (4) and a retractable wire; the wire take-up box (4) is fixed on the piston rod (3), and the free end of the retractable wire is fixedly connected to the blocking head (1); When the coreless linear motor (12) does not push the shuttle push ring (11), the blocking head (1) is located on the motion track of the shuttle push ring (11), the shuttle is on the side of the blocking head (1) away from the shuttle push ring (11), and a shuttle tip of the shuttle passes through the ring II.

2. The electromagnetic shuttle weft insertion device for a sisal heavy shuttle loom according to claim 1, characterized in that: The number of the blocking head guide groove (14) and the sliding block I is 2, and a guide groove baffle (15) is provided above each blocking head guide groove (14). The guide groove baffle (15) is used to cooperate with the blocking head guide groove (14) to restrict the sliding block I in the blocking head guide groove (14).

3. The electromagnetic shuttle weft insertion device for a sisal heavy shuttle loom according to claim 2, characterized in that: Along the length direction of the long strip through hole, rollers (2) are provided on both sides of the slider I, the lowest point of the rollers (2) is lower than the bottom of the slider I, and the slider I is rollingly connected to the blocking head guide groove (14) through the rollers (2).

4. The electromagnetic shuttle weft insertion device for a sisal heavy shuttle loom according to claim 3, characterized in that: The ironless linear motor (12) comprises a slider II (21).

5. The electromagnetic shuttle weft insertion device for a sisal heavy shuttle loom according to claim 4, characterized in that: The push shuttle mechanism also includes a cover plate (19) and a push shuttle connector (20); Along the horizontal direction, the connecting member I is provided with a through hole A; The push shuttle connector (20) is a horizontal plate; the lower surface of the push shuttle connector (20) is fixedly connected to the upper surface of the slider II (21); the upper surface of the push shuttle connector (20) is provided with a blind hole; the connector I passes through the long strip through hole and is inserted into the blind hole of the push shuttle connector (20); the cover plate (19) passes through the through hole A and is connected to the push shuttle connector (20) by bolts to fix the push shuttle ring (11) to the push shuttle connector (20); wherein, when the connector I is inserted into the blind hole of the push shuttle connector (20), the distance between the bottom of the through hole A of the connector I and the bottom of the blind hole is the depth of the blind hole.

6. The electromagnetic shuttle weft insertion device for a sisal heavy shuttle loom according to claim 5, characterized in that: The buffer mechanism also includes a hydraulic buffer mechanism; the hydraulic buffer mechanism includes a buffer platform (8), an optical axis screw, an assembly, a spring (9) and a hydraulic buffer (10); The assembly is a closed hollow cubic structure; the hydraulic buffer (10) is horizontally placed inside the assembly and fixedly connected to the assembly; one side of the assembly is marked as side A, and side A is provided with a through hole B and a through hole C; through hole B and through hole C both connect the outside and the inside of the assembly; the piston rod of the hydraulic buffer (10) passes through through hole B, so that the piston is exposed from the assembly; The buffer platform (8) is provided with a groove and a tapped hole; the piston is inserted into the groove and has an interference fit with the groove; one end of the optical axis screw is inserted into the tapped hole and fixedly connected to the buffer platform (8), and the other end of the optical axis screw is inserted into the interior of the assembly through the through hole C, and the optical axis screw and the through hole C have a clearance fit; the vertical projection of the optical axis screw on the side A does not contact the vertical projection of the hydraulic buffer (10) on the side A; The spring (9) is sleeved on the optical axis screw, one end of the spring is fixedly connected to the buffer platform (8), and the other end is fixedly connected to the side surface A; the length direction of the spring is the same as the length direction of the long strip through hole; The hydraulic buffer mechanism is arranged on the upper surface of the upper horizontal plate and is fixedly connected to the upper horizontal plate through an assembly. The hydraulic buffer mechanism is located on a side of the push shuttle ring (11) away from the blocking head (1). When the coreless linear motor (12) does not push the push shuttle ring (11), the buffer platform (8) fits the push shuttle ring (11).

7. The electromagnetic shuttle weft insertion device for a sisal heavy shuttle loom according to claim 6, characterized in that: A polyurethane buffer pad is provided on the surface where the buffer platform (8) and the push shuttle ring (11) are in contact.

8. The electromagnetic shuttle weft insertion device for a sisal heavy shuttle loom according to claim 7, characterized in that: The upper horizontal plate and the lower horizontal plate are rectangular plates, and the vertical projections of the upper horizontal plate and the lower horizontal plate on the horizontal plane coincide with each other; the length direction of the long strip through hole is the same as the length direction of the upper horizontal plate.

9. The electromagnetic shuttle weft insertion device for a sisal heavy shuttle loom according to claim 8, characterized in that: The number of the air pressure buffer mechanisms in the buffer mechanism is 2, which are respectively recorded as air pressure buffer mechanism I and air pressure buffer mechanism II; the air pressure buffer mechanism I and the air pressure buffer mechanism II are arranged along the width direction of the upper horizontal plate; the hydraulic buffer mechanism is located between the air pressure buffer mechanism I and the air pressure buffer mechanism II.

10. The electromagnetic shuttle weft insertion device for a sisal heavy shuttle loom according to claim 9, characterized in that: The number of the push shuttle mechanisms and the number of the buffer mechanisms are both 2, and the 2 push shuttle mechanisms and the 2 buffer mechanisms are symmetrically distributed on the sley.

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