A nozzle through-hole device for an air-jet loom

Abstract

This utility model discloses a nozzle through-hole device for an air-jet loom, belonging to the field of loom nozzle technology. Its key features include a base and a bracket fixedly connected to the surface of the base. An electric push rod is mounted on the top surface of the bracket, and the output shaft of the electric push rod passes through the surface of the bracket and is connected to a needle via a coupling. A positioning block is provided on the top surface of the base. This utility model uses the electric push rod to drive the needle to through-hole the nozzle. Combined with an external air pump and flexible air hose design, high-pressure gas can be used to loosen blockages before needle insertion, improving through-hole efficiency. By employing a V-shaped clamping block and a screw guide rail mechanism, it can accommodate nozzles of different sizes. The push rod and tension spring structure automatically correct the nozzle position during clamping to prevent tilting. The sliding design of the second guide rail allows for lateral position adjustment, avoiding needle interference and facilitating quick placement or removal of the nozzle, reducing operational difficulty and optimizing equipment space layout.

Description

Technical Field

[0001] This utility model belongs to the field of loom nozzle technology, specifically relating to a through-hole device for an air-jet loom nozzle. Background Technology

[0002] Air-jet looms are shuttleless looms that use a jet of air to guide the weft yarn through the shed. Their working principle utilizes air as the weft-introducing medium; the compressed air jet creates frictional traction on the weft yarn, drawing it through the shed. The jet of air then initiates the weft insertion. Currently, air-jet looms commonly employ a main nozzle with a shaped box for weft insertion. The main nozzle structure mainly consists of a nozzle body, nozzle core, conical sleeve, and yarn guide tube. This type of main nozzle offers good rectification, negative pressure weft insertion, and weft yarn acceleration, and is therefore widely used.

[0003] A search revealed Chinese patent CN218194497U, which discloses a deburring device for the inner flow channel of a jet loom nozzle. The device includes a first storage box and a second storage box. A base plate is fixedly connected to the opposite side surface of the first and second storage boxes. A support assembly is provided on the upper surface of the base plate. A nozzle is installed inside the support assembly. However, after use, lint, oil, or environmental dust from the yarn surface may adhere to the inner wall of the nozzle, causing blockage inside the nozzle. Utility Model Content

[0004] The purpose of this invention is to provide a nozzle through-hole device for an air-jet loom to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a nozzle through-hole device for an air-jet loom, comprising a base and a bracket fixedly connected to the surface of the base. An electric push rod is mounted on the top surface of the bracket, and the output shaft of the electric push rod passes through the surface of the bracket and is fitted with a pin via a coupling. A positioning block is provided on the top surface of the base, and two clamping blocks are symmetrically arranged above the positioning block. Two positioning grooves are symmetrically opened on the top surface of the positioning block. A first guide rail is provided inside one of the positioning grooves, and the two clamping blocks are slidably connected to the first guide rail via sliders. A lead screw is provided inside the other positioning groove, and the lead screw is rotatably connected to the positioning block via a bearing. The clamping block is threadedly connected to the lead screw via a threaded cylinder.

[0006] Preferably, the adjacent sides of the two clamping blocks are both V-shaped openings.

[0007] Preferably, a flexible air tube is mounted on the surface of the insertion pin, and the end of the flexible air tube away from the insertion pin passes through the surface of the bracket and is connected to an external air pump.

[0008] Preferably, each clamping block has two fixing rods symmetrically fixedly connected to its top surface, each fixing rod has a top rod slidably connected inside, each top rod has a rubber pad fixedly connected to one adjacent end, and a tension spring is provided above the fixing rod, with both ends of the tension spring fixedly connected to the fixing rod and the top rod respectively.

[0009] Preferably, the top surface of the positioning block is provided with a sliding groove, and two pads are symmetrically slidably connected inside the sliding groove, each pad being fixedly connected to its corresponding clamping block.

[0010] Preferably, two second guide rails are symmetrically installed on the bottom and top surfaces of the base, and a connecting plate is slidably connected to the surface of each second guide rail via a slider. The connecting plate and the positioning block are fixedly connected.

[0011] Preferably, a storage box is provided below the base, the storage box is slidably connected to the base, and a through hole is provided at the center of both the base and the positioning block.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] 1. This utility model uses an electric push rod to drive the needle to open the nozzle. At the same time, the design of an external air pump and soft air tube can use high-pressure gas to loosen the blockage before the needle is inserted, thereby improving the efficiency of the opening. The dislodged blockage is collected in a collection box to avoid secondary pollution and realize automated cleaning.

[0014] 2. This utility model adopts a V-shaped clamping block and a lead screw guide mechanism, which can be adapted to nozzles of different sizes; the push rod and tension spring structure automatically correct the nozzle position during clamping to prevent tilting; the pad moves synchronously with the clamping block to provide stable support and ensure that the nozzle is directly below the pin, thus improving the through hole accuracy.

[0015] 3. This utility model, through the sliding design of the second guide rail, allows for lateral adjustment of the position, avoids interference from the insertion pin, facilitates quick placement or removal of the nozzle, reduces operational difficulty, optimizes equipment space layout, and improves human-machine collaboration efficiency. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0017] Figure 2 This is a schematic diagram of the base and storage box structure of this utility model;

[0018] Figure 3 This is a schematic diagram of the positioning block and sliding groove structure of this utility model;

[0019] Figure 4 This is a schematic diagram of the clamping block and pad block structure of this utility model.

[0020] In the diagram: 1. Base; 2. Bracket; 3. Electric push rod; 4. Pin; 5. Positioning block; 6. First guide rail; 7. Clamping block; 8. Lead screw; 9. Fixing rod; 10. Top rod; 11. Tension spring; 12. Soft air tube; 13. Slide groove; 14. Pad block; 15. Second guide rail; 16. Connecting plate; 17. Storage box. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] Please see Figures 1-4 This utility model provides a nozzle through-hole device for an air-jet loom, including a base 1 and a bracket 2 fixedly connected to the surface of the base 1. An electric push rod 3 is installed on the top surface of the bracket 2, and the output shaft of the electric push rod 3 passes through the surface of the bracket 2 and is connected to a needle 4 via a coupling. A positioning block 5 is provided on the top surface of the base 1, and two clamping blocks 7 are symmetrically arranged above the positioning block 5. Two positioning grooves are symmetrically opened on the top surface of the positioning block 5. A first guide rail 6 is provided inside one of the positioning grooves, and the two clamping blocks 7 are slidably connected to the first guide rail 6 via sliders. A lead screw 8 is provided inside the other positioning groove, and the lead screw 8 is rotatably connected to the positioning block 5 via a bearing. The screw 8 is threadedly connected to the threaded cylinder. The two clamping blocks 7 have V-shaped openings on their adjacent sides. When it is necessary to open the nozzle, the nozzle is placed above the positioning block 5, and then the screw 8 is rotated. The two clamping blocks 7 will slide towards the nozzle through the slider on the surface of the first guide rail 6 until the two clamping blocks 7 clamp the nozzle. The shape of the clamping blocks 7 can clamp nozzles of different sizes within a certain range. At this time, the nozzle is located directly below the pin 4. Then, the electric push rod 3 is connected to an external power source and started. The pin 4 will extend into the nozzle, thereby pushing out the blockage inside the nozzle, thus realizing the opening of the nozzle.

[0023] In this embodiment, a flexible air tube 12 is installed on the surface of the insertion pin 4. The end of the flexible air tube 12 away from the insertion pin 4 passes through the surface of the bracket 2 and is connected to an external air pump. A storage box 17 is provided below the base 1. The storage box 17 is slidably connected to the base 1. Both the base 1 and the positioning block 5 have through holes at their center. When the insertion pin 4 passes through the hole, the external air pump is started, and gas enters the interior of the flexible air tube 12 and is finally sprayed from the insertion pin 4 into the interior of the nozzle. Thus, when the insertion pin 4 does not contact the blockage position, the gas is used to loosen the blockage, so that the blockage will eventually fall into the interior of the storage box 17, thereby achieving centralized collection of the blockage.

[0024] In this embodiment, two fixing rods 9 are symmetrically fixedly connected to the top surface of each clamping block 7. A top rod 10 is slidably connected inside each fixing rod 9. A rubber pad is fixedly connected to one adjacent end of each top rod 10. A tension spring 11 is provided above the fixing rod 9. The two ends of the tension spring 11 are fixedly connected to the fixing rod 9 and the top rod 10, respectively. When the two clamping blocks 7 move toward the nozzle, the four top rods 10 will simultaneously approach each other and squeeze the nozzle. After the rubber pad contacts the nozzle, the two clamping blocks 7 will continue to move toward the nozzle. The top rod 10 will slide inside the fixing rod 9, and the tension spring 11 will be pulled. The nozzle is straightened by the four top rods 10 to prevent the two clamping blocks 7 from tilting the nozzle.

[0025] In this embodiment, the top surface of the positioning block 5 is provided with a sliding groove 13. Two pads 14 are symmetrically slidably connected inside the sliding groove 13. Each pad 14 is fixedly connected to its corresponding clamping block 7. When the two clamping blocks 7 approach each other, the two pads 14 will slide inside the sliding groove 13 until the two pads 14 appear on the bottom surface of the nozzle. The nozzle is supported by the pads 14 to prevent the nozzle from being clamped too low.

[0026] In this embodiment, two second guide rails 15 are symmetrically installed on the bottom and top surfaces of the base 1. Each second guide rail 15 has a connecting plate 16 slidably connected to its surface via a slider. The connecting plate 16 and the positioning block 5 are fixedly connected. In order to avoid the bracket 2 from affecting the placement of the nozzle, when the nozzle is placed, force is applied to the positioning block 5 so that the connecting plate 16 slides on the surface of the second guide rail 15 via the slider. This ensures that the center of the positioning block 5 is not below the pin 4, thereby preventing the pin 4 from interfering with the placement of the nozzle.

[0027] It should be noted that the lead screw and the inner wall of the threaded cylinder used in this utility model are provided with an annular groove in the axial direction. A nylon 66 damping ring with a Shore hardness of 85A is embedded in the groove. The continuous axial clamping force generated by its elastic deformation forms a helical angle interference fit with the surface of the threaded rod at 15°-20°. When the threaded pair is subjected to axial vibration load, the nylon insert can generate a maximum elastic compression of 0.3mm, which increases the friction coefficient between the thread contact surfaces from 0.15 to 0.68 (tested according to ASTM D1894 standard), effectively suppressing the loosening displacement caused by thread springback.

[0028] It should be noted that the air pump and electric push rod 3 used in this utility model are existing technologies. Those skilled in the art can set them according to actual needs, and they will not be described in detail here.

[0029] The use of this utility model involves the following steps:

[0030] S1: When it is necessary to open the nozzle, place the nozzle above the positioning block 5, and then apply force to the lead screw 8 to make it rotate. The two clamping blocks 7 will slide towards the nozzle through the slider on the surface of the first guide rail 6 until the two clamping blocks 7 clamp the nozzle. The shape of the clamping blocks 7 can clamp nozzles of different sizes within a certain range. At this time, the nozzle is located directly below the pin 4. Then connect the electric push rod 3 to the external power supply and start it. The pin 4 will extend into the nozzle, thereby pushing out the blockage inside the nozzle, thus realizing the opening of the nozzle.

[0031] S2: When the pin 4 passes through the hole, the external air pump is started. The gas will enter the interior of the soft air tube 12 and finally spray out from the pin 4 into the nozzle. Thus, when the pin 4 does not contact the blockage, the gas will loosen the blockage and allow it to fall into the storage box 17, thereby achieving centralized collection of the blockage.

[0032] S3: When the two clamping blocks 7 move toward the nozzle, the four push rods 10 will move closer to each other and squeeze the nozzle. After the rubber pad and the nozzle come into contact with each other, the two clamping blocks 7 will continue to move toward the nozzle. The push rods 10 will slide inside the fixed rod 9, and the tension spring 11 will be pulled. The nozzle will be aligned by the four push rods 10 to prevent the two clamping blocks 7 from clamping the nozzle and causing it to tilt.

[0033] S4: When the two clamping blocks 7 approach each other, the two pads 14 will slide inside the slide groove 13 until the two pads 14 appear on the bottom surface of the nozzle. The nozzle is supported by the pads 14 to prevent the nozzle from being clamped too low.

[0034] S5: To prevent the bracket 2 from affecting the placement of the nozzle, when placing the nozzle, force is applied to the positioning block 5 so that the connecting plate 16 slides on the surface of the second guide rail 15 through the slider, so that the center of the positioning block 5 is not below the pin 4, thereby preventing the pin 4 from interfering with the placement of the nozzle.

[0035] Finally, the following points should be noted: In the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installation", "connection" and "linkage" should be interpreted broadly, and can be mechanical or electrical connection, or internal connection between two components, or direct connection. "Up", "down", "left", "right", etc. are only used to indicate relative positional relationship. When the absolute position of the described object changes, the relative positional relationship may change.

[0036] The electronic components and modules used in this utility model can all be parts that are commonly used in the market and can achieve the specific functions in this case. The specific models and sizes can be selected and adjusted according to actual needs.

[0037] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A through-hole device for air-jet loom nozzles, comprising a base (1) and a support (2) fixedly connected to the surface of said base (1), characterized in that: An electric push rod (3) is installed on the top surface of the bracket (2). The output shaft of the electric push rod (3) passes through the surface of the bracket (2) and is connected to a pin (4) via a coupling. A positioning block (5) is provided on the top surface of the base (1). Two clamping blocks (7) are symmetrically arranged above the positioning block (5). Two positioning grooves are symmetrically opened on the top surface of the positioning block (5). A first guide rail (6) is provided inside one of the positioning grooves. The two clamping blocks (7) are slidably connected to the first guide rail (6) via a slider. A lead screw (8) is provided inside the other positioning groove. The lead screw (8) is rotatably connected to the positioning block (5) via a bearing. The clamping block (7) is threadedly connected to the lead screw (8) via a threaded cylinder.

2. The nozzle through-hole device for an air-jet loom according to claim 1, characterized in that: Both of the two clamping blocks (7) have V-shaped openings on adjacent sides.

3. The nozzle through-hole device for an air-jet loom according to claim 2, characterized in that: A flexible air tube (12) is installed on the surface of the pin (4). The end of the flexible air tube (12) away from the pin (4) passes through the surface of the bracket (2) and is connected to an external air pump.

4. The nozzle through-hole device for an air-jet loom according to claim 3, characterized in that: Each clamp (7) has two fixed rods (9) symmetrically fixedly connected to its top surface. Each fixed rod (9) has a top rod (10) slidably connected inside it. Each top rod (10) has a rubber pad fixedly connected to one adjacent end. A tension spring (11) is provided above the fixed rod (9). The two ends of the tension spring (11) are fixedly connected to the fixed rod (9) and the top rod (10) respectively.

5. The nozzle through-hole device for an air-jet loom according to claim 4, characterized in that: The top surface of the positioning block (5) is provided with a sliding groove (13), and two pads (14) are symmetrically slidably connected inside the sliding groove (13). Each pad (14) is fixedly connected to its corresponding clamping block (7).

6. The nozzle through-hole device for an air-jet loom according to claim 1, characterized in that: The base (1) has two second guide rails (15) symmetrically installed on its bottom and top surfaces. Each second guide rail (15) has a connecting plate (16) slidably connected to its surface via a slider. The connecting plate (16) and the positioning block (5) are fixedly connected.

7. The nozzle through-hole device for an air-jet loom according to claim 6, characterized in that: A storage box (17) is provided below the base (1). The storage box (17) is slidably connected to the base (1). Both the base (1) and the positioning block (5) have through holes at their center positions.

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