Independent weft finding mechanism of weaving machine

Abstract

When a machine needs a weft finding action, a piston driving piece executes a push-out action to push a positioning gear and a carrier gear to do axial movement, the carrier gear is separated from a weft insertion gear, the positioning gear is meshed with the weft insertion gear, and at the moment, the carrier gear is only meshed with a driving gear and an opening gear; the driving gear drives the opening gear to independently operate through the carrier gear to complete independent weft finding action, after the weft finding action is completed, the piston driving part executes returning action to drive the positioning gear and the carrier gear to axially move in opposite directions, the positioning gear is separated from the weft insertion gear, and the carrier gear is meshed with the weft insertion gear. Meanwhile, the carrier gear is synchronously meshed with the driving gear and the opening gear, so that the machine operates normally. According to the embodiment, the piston driving piece is adopted to control axial displacement of the carrier gear and the positioning gear, mechanical hard decoupling of the opening mechanism and the weft insertion and beating-up mechanism is achieved, and the abrasion failure risk of a traditional clutch is avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to weaving machine technical field, concretely relates to weaving machine independent weft finding mechanism. BACKGROUND

[0002] As a traditional labor-intensive industry, the weaving industry has become an urgent task to promote the automation level of weaving machines and reduce the dependence on manual labor as the labor cost rises and the demand for intelligent upgrading intensifies. As the mainstream weaving equipment, the core mechanisms of the water jet loom include the shedding mechanism, the weft insertion mechanism, the beating-up mechanism, the warp feeding mechanism, and the take-up mechanism, etc. In the conventional weaving process: the shedding mechanism drives the heald frame to rise and fall to form a shed, the weft insertion mechanism introduces the weft yarn into the shed through high-pressure water flow, and the beating-up mechanism then pushes the reed to beat the weft yarn into the shed to complete the cloth forming action.

[0003] When the weft yarn breaks or the machine restarts, the automatic weft finding function needs to be started - at this time, the shedding mechanism, the warp feeding mechanism, and the take-up mechanism need to run independently to accurately reset the position of the warp and weft yarns, while the weft insertion and beating-up mechanisms are temporarily suspended to avoid interference. The existing technology generally uses a mechanical linkage type weft finding system, which switches the power transmission path through a clutch or a solenoid valve to decouple the shedding mechanism from the weft insertion and beating-up mechanisms. However, this solution has significant defects, as the frequent switching of the mechanical clutch leads to increased wear and tear, with a failure rate as high as 15%-20%, and there is an urgent need for a high-reliability, low-energy consumption independent weft finding solution. SUMMARY

[0004] To solve the technical problem of existing technology that the frequent switching of the clutch leads to increased wear and tear, the utility model provides a weaving machine independent weft finding mechanism, which uses a piston driving element to control the axial displacement of the bridge gear and the positioning gear, achieving mechanical hard decoupling of the shedding mechanism and the weft insertion and beating-up mechanisms, and avoiding the risk of wear and failure of traditional clutches.

[0005] The technical scheme adopted by the utility model is as follows: a weaving machine independent weft finding mechanism, comprising a piston driving element, a bridge gear, a positioning gear, a driving gear, a weft insertion gear, and a shedding gear, the output end of the piston driving element is connected with the bridge gear and the positioning gear respectively, the output end of the piston driving element has an extended state and a retracted state, when the output end of the piston driving element is in the extended state, the bridge gear is separated from the weft insertion gear, the positioning gear is engaged with the weft insertion gear, the bridge gear is engaged with the driving gear and the shedding gear respectively; when the output end of the piston driving element is in the retracted state, the positioning gear is separated from the weft insertion gear, the bridge gear is engaged with the weft insertion gear, the driving gear, and the shedding gear respectively, and the driving gear is connected with a rotary motor.

[0006] Optionally, the piston driving element output end is provided with a connecting block, the connecting block is provided with a first connecting rod and a second connecting rod arranged in parallel with the first connecting rod, the first connecting rod is coaxially connected with the bridge gear, and the second connecting rod is coaxially fixedly connected with the positioning gear.

[0007] Optionally, the diameter of the positioning gear is smaller than the diameter of the bridge gear, the bridge gear is movably engaged with one side of the weft insertion gear, the positioning gear is movably engaged with the other side of the weft insertion gear, and the driving gear is arranged on the side of the bridge gear away from the weft insertion gear.

[0008] Optionally, the diameter of the positioning gear is smaller than the distance between the weft insertion gear and the shedding gear, and the diameter of the bridge gear is greater than the distance between the weft insertion gear and the shedding gear.

[0009] Optionally, the mounting axial position of the shedding gear is offset relative to the weft insertion gear in a direction away from the piston driving element, when the piston driving element output end is in the extended state, the bridge gear moves in the axial direction to the tooth width of the bridge gear overlapping the tooth width of the shedding gear, and the bridge gear is separated from the weft insertion gear, and when the piston driving element output end is in the retracted state, the tooth width of the bridge gear overlaps the tooth width of the weft insertion gear and the shedding gear at the same time.

[0010] Optionally, the outer peripheral wall of the first connecting rod is sleeved with a bearing, and the outer ring of the bearing is in interference fit with the inner peripheral wall of the bridge gear.

[0011] Optionally, the weft insertion gear is coaxially provided with a weft insertion shaft for connecting a weft insertion beating-up mechanism.

[0012] Optionally, the shedding gear is coaxially provided with a shedding shaft for connecting a shedding mechanism.

[0013] Optionally, the piston driving element is a hydraulic cylinder or a gas cylinder.

[0014] The beneficial effects of the utility model are as follows: when the machine needs to perform a weft finding action, the piston driving element performs a pushing action, drives the positioning gear and the bridge gear to move axially, the bridge gear is separated from the weft insertion gear, the positioning gear is engaged with the weft insertion gear, at this time, the bridge gear is only engaged with the driving gear and the shedding gear, the driving gear drives the shedding gear to rotate alone through the bridge gear, and an independent weft finding action is completed, when the weft finding action is completed, the piston driving element performs a retraction action, drives the positioning gear and the bridge gear to move axially in the opposite direction, the positioning gear is separated from the weft insertion gear, the bridge gear is engaged with the weft insertion gear, and the bridge gear is synchronously engaged with the driving gear and the shedding gear, so that the machine normally operates. The embodiment adopts the piston driving element to control the axial displacement of the bridge gear and the positioning gear, realizes mechanical hard decoupling of the shedding mechanism and the weft insertion beating-up mechanism, and avoids the wear and failure risk of a traditional clutch. BRIEF DESCRIPTION OF DRAWINGS

[0015] Fig. 1 The schematic diagram of the bridge gear and the weft guiding gear meshing of the independent weft finding mechanism of the loom is provided for the embodiments of the present application;

[0016] Fig. 2 The schematic diagram of the positioning gear and the weft guiding gear meshing of the independent weft finding mechanism of the loom is provided for the embodiments of the present application;

[0017] Fig. 3 The schematic diagram of the bridge gear meshing with the weft guiding gear, the driving gear and the shedding gear of the independent weft finding mechanism of the loom is provided for the embodiments of the present application.

[0018] The marks in each drawing are as follows: 1, piston driving member; 2, bridge gear; 3, positioning gear; 4, driving gear; 5, weft guiding gear; 6, shedding gear; 7, connecting block; 8, first connecting rod; 9, second connecting rod; 10, weft guiding shaft; 11, shedding shaft. DETAILED DESCRIPTION

[0019] The present application will be further described in detail below in combination with the drawings and embodiments.

[0020] As Figs. 1 to 3As shown, this embodiment discloses an independent weft-finding mechanism for a loom, including a piston drive 1, a bridge gear 2, a positioning gear 3, a drive gear 4, a weft insertion gear 5, and a sheath gear 6. The output end of the piston drive 1 is connected to the bridge gear 2 and the positioning gear 3 respectively. The output end of the piston drive 1 has an extended state and a retracted state. When the output end of the piston drive 1 is in the extended state, the bridge gear 2 is separated from the weft insertion gear 5, the positioning gear 3 is engaged with the weft insertion gear 5, and the bridge gear 2 is engaged with the drive gear 4 and the sheath gear 6 respectively. When the output end of the piston drive 1 is in the retracted state, the positioning gear 3 is separated from the weft insertion gear 5, and the bridge gear 2 is engaged with the weft insertion gear 5, the drive gear 4, and the sheath gear 6 respectively. The drive gear 4 is connected to a rotary motor. When the machine needs to perform the weft-finding action, the piston drive 1 performs an outward action, pushing the positioning gear 3 and the intermediate gear 2 to move axially. The intermediate gear 2 disengages from the weft-introducing gear 5, and the positioning gear 3 meshes with the weft-introducing gear 5. At this time, the intermediate gear 2 only meshes with the driving gear 4 and the shedding gear 6. The driving gear 4 drives the shedding gear 6 to operate independently through the intermediate gear 2, completing the independent weft-finding action. After the weft-finding action is completed, the piston drive 1 performs a retraction action, driving the positioning gear 3 and the intermediate gear 2 to move axially in the opposite direction. The positioning gear 3 disengages from the weft-introducing gear 5, and the intermediate gear 2 meshes with the weft-introducing gear 5. At the same time, the intermediate gear 2 meshes synchronously with the driving gear 4 and the shedding gear 6, enabling the machine to operate normally. In this embodiment, the piston drive 1 controls the axial displacement of the intermediate gear 2 and the positioning gear 3, achieving mechanical decoupling between the shedding mechanism and the weft-introducing and beating mechanism, avoiding the risk of wear and failure of traditional clutches.

[0021] like Fig. 2 As shown, the output end of the piston drive 1 is provided with a connecting block 7. The connecting block 7 is provided with a first connecting rod 8 and a second connecting rod 9 arranged parallel to the first connecting rod 8. The first connecting rod 8 is rotatably connected to the bridge gear 2 on the same axis, and the second connecting rod 9 is fixedly connected to the positioning gear 3 on the same axis. When the output end of the piston drive 1 extends, the bridge gear 2 moves forward and separates from the weft insertion gear 5, and the positioning gear 3 meshes with the weft insertion gear 5. When the output end of the piston drive 1 retracts, the positioning gear 3 separates from the weft insertion gear 5, and at the same time, the bridge gear 2 meshes with the weft insertion gear 5.

[0022] like Fig. 1 As shown, the diameter of the positioning gear 3 is smaller than the diameter of the transition gear 2. The transition gear 2 is movably meshed with the weft insertion gear 5 on one side, and the positioning gear 3 is movably meshed with the weft insertion gear 5 on the other side. The driving gear 4 is located on the side of the transition gear 2 away from the weft insertion gear 5. The diameter of the positioning gear 3 is smaller than the distance between the weft insertion gear 5 and the open gear 6, and the diameter of the transition gear 2 is larger than the distance between the weft insertion gear 5 and the open gear 6. This is to prevent the positioning gear 3 from interfering with the open gear 6 during movement.

[0023] As Fig. 1 and 2 shown, the mounting axial position of the opening gear 6 is offset relative to the weft insertion gear 5 in the direction away from the piston driving member 1, when the output end of the piston driving member 1 is in the extended state, the bridge gear 2 is moved in the axial direction to overlap the tooth width of the opening gear 6, and the bridge gear 2 is separated from the weft insertion gear 5; when the output end of the piston driving member 1 is in the retracted state, the tooth width of the bridge gear 2 overlaps the tooth width of the weft insertion gear 5 and the opening gear 6 at the same time. When the output end of the piston driving member 1 is in the extended state, the bridge gear 2 is separated from the weft insertion gear 5, but still engages with the opening gear 6, and when the output end of the piston driving member 1 is in the retracted state, the bridge gear 2 engages with the weft insertion gear 5 and the opening gear 6 respectively.

[0024] In the embodiment, the outer peripheral wall of the first connecting rod 8 is sleeved with a bearing, and the outer ring of the bearing is fastened against the inner peripheral wall of the bridge gear 2. The bridge gear 2 is rotatably installed on the first connecting rod 8 through the bearing, and when the bridge gear 2 engages with the weft insertion gear 5 and the driving gear 4 respectively, the driving gear 4 drives the weft insertion gear 5 to rotate through the bridge gear 2.

[0025] As Fig. 1 shown, the weft insertion gear 5 is coaxially provided with a weft insertion shaft 10 for connecting a weft insertion beating-up mechanism. The opening gear 6 is coaxially provided with an opening shaft 11 for connecting an opening mechanism.

[0026] In the embodiment, the piston driving member is a hydraulic cylinder or a pneumatic cylinder.

[0027] It can be understood that the above-described specific embodiments are only used to explain the related utility model, and are not limited to the utility model. In addition, it should be noted that, for the convenience of description, only the parts related to the utility model are shown in the drawings. The multiple technical solutions in the same embodiment, and the multiple technical solutions in different embodiments can be arranged and combined to form new technical solutions without contradiction or conflict. Any equivalent structural transformation, direct or indirect application in other related technical fields, is also included in the protection scope of the utility model.

Claims

1. A weaving machine independent weft insertion mechanism, characterized in that The invention relates to a weft insertion mechanism, comprising a piston drive, a bridge gear, a positioning gear, a driving gear, a weft insertion gear and an opening gear, the bridge gear is rotatably connected with the output end of the piston drive, the positioning gear is fixedly connected with the output end of the piston drive, the output end of the piston drive has an extended state and a retracted state, when the output end of the piston drive is in the extended state, the bridge gear is separated from the weft insertion gear, the positioning gear is engaged with the weft insertion gear, the bridge gear is engaged with the driving gear and the opening gear respectively; when the output end of the piston drive is in the retracted state, the positioning gear is separated from the weft insertion gear, the bridge gear is engaged with the weft insertion gear, the driving gear and the opening gear respectively, the driving gear is connected with a rotary motor.

2. The loom independent weft finding mechanism according to claim 1, characterized in that, The output end of the piston drive is provided with a connecting block, the connecting block is provided with a first connecting rod and a second connecting rod arranged in parallel with the first connecting rod, the first connecting rod is coaxially rotatably connected with the bridge gear, the second connecting rod is coaxially fixedly connected with the positioning gear.

3. The loom independent weft finding mechanism according to claim 1, characterized in that, The diameter of the positioning gear is smaller than the diameter of the bridge gear, the bridge gear is movably engaged with one side of the weft insertion gear, the positioning gear is movably engaged with the other side of the weft insertion gear, the driving gear is arranged on the side of the bridge gear away from the weft insertion gear.

4. The loom independent weft finding mechanism according to claim 3, characterized in that, The diameter of the positioning gear is smaller than the distance between the weft insertion gear and the opening gear, the diameter of the bridge gear is larger than the distance between the weft insertion gear and the opening gear.

5. The loom independent weft finding mechanism according to claim 3, characterized in that, The installation axial position of the opening gear is offset relative to the weft insertion gear in the direction away from the piston drive, when the output end of the piston drive is in the extended state, the bridge gear moves along the axial direction to the state that the tooth width of the bridge gear overlaps the tooth width of the opening gear, and the bridge gear is separated from the weft insertion gear; when the output end of the piston drive is in the retracted state, the tooth width of the bridge gear overlaps the tooth width of the weft insertion gear and the opening gear simultaneously.

6. The loom independent weft finding mechanism according to claim 2, characterized in that, The outer peripheral wall of the first connecting rod is sleeved with a bearing, the outer ring of the bearing is interference-fitted with the inner peripheral wall of the bridge gear.

7. The loom independent weft finding mechanism according to claim 1, characterized in that, The weft insertion gear is coaxially provided with a weft insertion shaft for connecting a weft insertion beating-up mechanism.

8. The loom independent weft finding mechanism according to claim 1, characterized in that, The opening gear is coaxially provided with an opening shaft for connecting an opening mechanism.

9. The loom independent weft finding mechanism according to claim 1, characterized in that, The piston drive is a hydraulic cylinder or a gas cylinder.

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