Excellent wire rotating shuttle
By designing positioning protrusions on the wire plate of the shuttle and setting positioning holes on the shuttle bed, the problem of inconsistent position of the wire plate during the shuttle assembly is solved, ensuring wire accuracy and production efficiency, and reducing position offset during transportation , improves the quality and stability of industrial sewing machines.
Patent Information
- Application Number
- CN202420787183.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-16
- Publication Date
- 2024-12-17
- Estimated Expiration
- 2034-04-16
AI Technical Summary
During assembly, the existing rotary shuttle is inconsistent with the position of the conductor plate and the shuttle bed due to the gap between the counterhead screw and the counterhead hole and the thickness of the conductor plate, which affects the conductor accuracy and production efficiency of the rotary shuttle, and is prone to positional squirming during transportation. Affects use.
The design wire plate is equipped with positioning protrusions on the inner peripheral wall, and the shuttle bed is equipped with positioning holes on the outer peripheral wall. Through the coordination of the positioning protrusions and positioning holes, the relative position of the wire plate and the shuttle bed is fixed to ensure the assembly consistency, and Reduce position offset during transportation.
The same batch of screw-shuttle wire plates and the shuttle bed position consistency is achieved, the wire accuracy and production efficiency of screw-shuttle are improved, the risk of position deviation during transportation is reduced, and the quality and use stability of industrial sewing machines are improved.
Smart Images
Figure CN222182725U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of rotary hooks, in particular to a rotary hook with a good conductor. Background Art
[0002] The rotary shuttle is an important component of an industrial sewing machine. It is mainly composed of a shuttle bed and a shuttle frame. When working, the shuttle bed rotates and the shuttle frame is stationary. The shuttle frame is loaded with a bobbin for winding and storing the sewing bobbin thread, and a bobbin case that wraps the bobbin. When the rotary shuttle is working, the needle pulls the upper thread through the fabric and bypasses the lower thread device set inside the rotary shuttle, so that the upper thread forms a loop, buckles the lower thread and locks the thread in the middle of the fabric.
[0003] In addition, a wire plate for wires is provided on the outer circumferential surface of the shuttle bed. At present, the wire plate is mainly installed on the outer circumferential surface of the shuttle frame by countersunk screws. Specifically, countersunk holes are provided on the wire plate, and screw holes are opened on the outer circumferential surface of the shuttle frame corresponding to the positions of the countersunk holes. During installation, the countersunk screws are passed through the countersunk holes and screwed into the screw holes to realize the installation of the wire plate.
[0004] However, in actual assembly, considering factors such as assembly efficiency and cumulative machining errors, the gap between the outer diameter of the countersunk screw and the inner diameter of the countersunk hole reaches about 0.2 mm. In addition, due to the thin thickness of the wire plate, the taper of the countersunk hole on the wire plate reaches 100°. Therefore, when using the countersunk screw for installation, the axial and circumferential position movement errors of the wire plate and the shuttle bed are large. Therefore, for multiple shuttles from the same batch, when the assembly is completed, the relative positions of the wire plates and the shuttle beds of different shuttles are easily inconsistent, resulting in inconsistent wire quantities and precisions for different shuttles from the same batch, affecting the quality and production efficiency of industrial sewing machines.
[0005] In addition, since the taper of the countersunk hole is 100°, the axial fastening force between the wire guide and the shuttle bed is poor. If the shuttle encounters a collision during packaging and transportation, it is easy for the wire guide to move or shift relative to the shuttle bed, which will subsequently affect the use of the shuttle. Utility Model Content
[0006] In order to solve at least one of the technical problems mentioned in the background technology, the purpose of the utility model is to provide a wire fine hook.
[0007] In order to achieve the above purpose, the utility model provides the following technical solutions:
[0008] A fine wire hook comprises a shuttle bed and a shuttle frame installed on the shuttle bed and capable of rotating relative to the shuttle bed; a wire plate is installed on the outer peripheral surface of the shuttle bed by screws, and two positioning protrusions are arranged on the inner peripheral wall of the wire plate and the outer peripheral wall of the shuttle bed, and two positioning holes for inserting the two positioning protrusions are arranged on the other; when the two positioning protrusions are inserted into the two positioning holes at the same time, the wire plate and the shuttle bed maintain relative positioning.
[0009] As an optional implementation of the utility model, two positioning protrusions are arranged on the inner peripheral wall of the wire guide, and two positioning holes are opened on the outer peripheral wall of the shuttle bed.
[0010] As an optional implementation manner of the present utility model, the positioning protrusion is conical, and / or the positioning hole is cylindrical.
[0011] As an optional implementation manner of the present utility model, there is a clearance fit between the positioning protrusion and the positioning hole.
[0012] As an optional implementation of the present invention, the diameter of the positioning hole is within 0.05 mm larger than the maximum outer circle diameter of the positioning protrusion.
[0013] As an optional embodiment of the utility model, the shuttle bed has a shuttle tip, the top surface of the shuttle tip constitutes a shuttle tip plane; the position tolerance of the two positioning holes and the shuttle tip plane is within 0.025mm; the position tolerance of the two positioning protrusions and the highest point of the wire surface of the wire plate is within 0.025mm.
[0014] As an optional implementation of the present invention, the two positioning protrusions are distributed in sequence along the circumference of the wire plate.
[0015] As an optional embodiment of the utility model, the wire guide is provided with a mounting hole for the screw to pass through, and the outer peripheral wall of the shuttle bed is provided with a screw hole for the screw threaded connection corresponding to the position of the mounting hole, and when the two positioning protrusions are inserted into the two positioning holes at the same time, the mounting hole and the screw hole are in a coaxial state.
[0016] Compared with the prior art, the advantages of adopting this solution are:
[0017] In the present solution, two positioning protrusions and two positioning holes are provided, so that when the wire guide is assembled on the shuttle bed, the positioning protrusions and the positioning holes can play an assembly positioning role. Thus, after the positioning protrusions are inserted into the positioning holes, the relative positions of the wire guide and the shuttle bed are limited, so that the wire guide will basically not move relative to the shuttle bed. Therefore, when assembling the same batch of rotary hooks, it can be ensured that the relative positions of the wire guides and the shuttle bed in each rotary hook are basically consistent, so that the wire amount and accuracy of different rotary hooks in the same batch are basically consistent, which is beneficial to improving the quality and production efficiency of industrial sewing machines.
[0018] In addition, under the positioning of the positioning hole and the positioning protrusion, the relative position of the wire guide and the shuttle bed is fixed, so that even if the rotary shuttle is hit during packaging and transportation, the wire guide is not likely to move relative to the shuttle bed. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Figure 1 It is a schematic diagram of the structure of the utility model;
[0020] Figure 2 It is a partial exploded view of the utility model;
[0021] Figure 3 It is the structural schematic diagram of the shuttle bed;
[0022] Figure 4 It is a structural schematic diagram of the conductor board;
[0023] Figure 5 It is a radial cross-sectional view of the utility model at the location of the positioning protrusion. DETAILED DESCRIPTION
[0024] The following is an explanation and description of the technical scheme of the embodiment of the utility model in conjunction with the drawings of the embodiment of the utility model, but the following embodiment is only a preferred embodiment of the utility model, not all. Based on the embodiment in the implementation mode, other embodiments obtained by those skilled in the art without creative work are all within the protection scope of the utility model.
[0025] In the following description, terms such as "inside", "outside", "up", "down", "left", "right", etc. that indicate directions or positional relationships are only used to facilitate the description of the embodiments and simplify the description, and do not indicate or imply that the referred device or element must have a specific direction, be constructed and operate in a specific direction. Therefore, it should not be understood as a limitation on the present invention.
[0026] See also Figure 1-5 As shown, this embodiment provides a fine wire hook, including a shuttle bed 2 and a shuttle frame 1 installed on the shuttle bed 2 and capable of rotating relative to the shuttle bed 2; the shuttle bed 2 has a shuttle tip 21, and the top surface of the shuttle tip 21 constitutes a shuttle tip plane 211; a wire plate 3 is installed on the outer peripheral surface of the shuttle bed 2; generally, four screws 5 are used to install the wire plate 3 on the shuttle bed 2.
[0027] When the rotary shuttle is working, the shuttle bed 2 is driven by the lower shaft of the sewing machine to rotate at a high speed, and the shuttle frame 1 arranged in the middle of the shuttle bed 2 is caught by the positioning hook block of the sewing machine and is relatively still. When the machine needle drives the surface thread to pass through the sewing fabric to the lower dead point of the stroke and returns a certain distance, a thread loop is formed due to the surplus surface thread of the return stroke. The shuttle tip 21 of the rotating shuttle bed 2 passes through the thread loop and drags the surface thread to wind around the outer periphery of the stationary shuttle frame 1. Because the outer periphery of the shuttle frame 1 and the outer periphery of the bobbin case 4 arranged inside the shuttle frame 1 for installing the bottom line are both irregular arc surfaces; in this way, the surface thread is dragged by the shuttle bed 2, and along the guide wire surface 31 arranged on the upper part of the guide wire plate 3 arranged on the outer periphery of the shuttle bed 2, the winding surface thread is accurately guided through the outer periphery of the shuttle frame 1 and the bobbin case 4 to complete the winding process.
[0028] like Figure 1 and Figure 2 As shown, the guide plate 3 is mounted on the outer peripheral surface of the shuttle bed 2 by screws 5, and generally four countersunk screws 5 are used. Specifically, a mounting hole 32 for the screws 5 to pass through is provided on the guide plate 3, and the mounting hole 32 is preferably a countersunk hole; a screw hole 22 for the screws 5 to be threadedly connected is provided on the outer peripheral wall of the shuttle bed 2 at a position corresponding to the mounting hole 32. During installation, the screws 5 pass through the mounting hole 32 and are threadedly connected with the screw hole 22, so that the guide plate 3 is fixed to the outer peripheral wall of the shuttle bed 2 by the screws 5, and the inner peripheral wall of the guide plate 3 is in contact with the outer peripheral wall of the shuttle bed 2.
[0029] This type of rotary hook has been specifically applied and publicly described in the prior art, so no further elaboration is given here.
[0030] The inner wall of the guide plate 3 and the outer wall of the shuttle bed 2 are provided with two positioning protrusions 30 on one of them, and two positioning holes 20 for inserting the two positioning protrusions 30 on the other, for example, Figure 4 As shown, in this embodiment, two positioning protrusions 30 are specifically shown to be arranged on the inner peripheral wall of the wire plate 3. Figure 3 As shown, two positioning holes 20 are formed on the outer peripheral wall of the shuttle bed 2 , and one positioning hole 20 corresponds to one positioning protrusion 30 .
[0031] The axes of the two positioning holes 20 extend along the radial direction of the shuttle bed 2 , the axes of the two positioning protrusions 30 extend along the radial direction of the wire guide 3 , and the two positioning protrusions 30 are sequentially distributed along the circumference of the wire guide 3 .
[0032] During assembly, if Figure 5 As shown, when the two positioning protrusions 30 are inserted into the two positioning holes 20 at the same time, the wire guide 3 and the shuttle bed 2 maintain relative positioning. The relative positioning here can be understood as that the wire guide 3 and the shuttle bed 2 maintain positioning in the axial and circumferential directions, that is, the wire guide 3 will basically not be offset relative to the shuttle bed 2 in the axial and circumferential directions.
[0033] In addition, when the two positioning protrusions 30 are inserted into the two positioning holes 20 at the same time, the mounting hole 32 and the screw hole 22 are in a coaxial state. In this way, the cooperation between the two positioning protrusions 30 and the positioning holes 20 is equivalent to playing a role of matching holes, ensuring that the axis of the mounting hole 32 and the axis of the screw hole 22 are basically coincident, so as to facilitate the subsequent threading and connection of the screws 5.
[0034] By providing two positioning protrusions 30 and two positioning holes 20, when the guide wire plate 3 is assembled on the shuttle bed 2, the positioning protrusions 30 and the positioning holes 20 can play an assembly positioning role. In this way, after the positioning protrusions 30 are inserted into the positioning holes 20, the relative positions of the guide wire plate 3 and the shuttle bed 2 are limited, so that the guide wire plate 3 basically does not move relative to the shuttle bed 2. Therefore, when assembling the same batch of rotary hooks, it can be ensured that the relative positions of the guide wire plate 3 and the shuttle bed 2 in each rotary hook are basically consistent, so that the guide wire amount and accuracy of different rotary hooks in the same batch are basically consistent, which is beneficial to the improvement of the quality and production efficiency of industrial sewing machines.
[0035] In other words, assuming that the relative positions of the guide plate 3 and the shuttle bed 2 of two rotary hooks of the same batch are inconsistent, for example, in one rotary hook, the guide plate 3 is relatively high relative to the shuttle bed 2, and in the other rotary hook, the guide plate 3 is relatively low relative to the shuttle bed 2, then when the two rotary hooks are threading, there will be differences in the amount of threading and the accuracy of the two.
[0036] In addition, under the positioning of the positioning hole 20 and the positioning protrusion 30, the relative position of the wire guide 3 and the shuttle bed 2 is fixed. In this way, even if the shuttle is hit during packaging and transportation, the positioning of the positioning protrusion 30 and the positioning hole 20 prevents the wire guide 3 from moving relative to the shuttle bed 2.
[0037] In this embodiment, in order to facilitate the insertion of the two positioning protrusions 30 into the two positioning holes 20, the positioning protrusions 30 are conical in shape, wherein the end of the positioning protrusions 30 away from the wire board 3 is a narrow end; the positioning hole 20 is cylindrical.
[0038] In addition, in this embodiment, the positioning protrusion 30 and the positioning hole 20 are clearance-fitted, and preferably, the diameter of the positioning hole 20 is within 0.05 mm larger than the maximum outer diameter of the positioning protrusion 30 .
[0039] The reason why the positioning protrusion 30 and the positioning hole 20 are loosely matched is that, firstly, it is convenient for the positioning protrusion 30 to be inserted into the positioning hole 20 , and secondly, it can also compensate for the precision error of the positioning hole 20 and / or the positioning protrusion 30 caused by machining.
[0040] In addition, in order to ensure the assembly accuracy of the wire guide 3 and the shuttle bed 2, the position tolerance between the two positioning holes 20 and the shuttle tip plane 211 is within 0.025mm; the position tolerance between the two positioning protrusions 30 and the highest point of the wire surface 31 of the wire guide 3 is within 0.025mm.
[0041] The position tolerance between the two positioning holes 20 and the shuttle tip plane 211 is within 0.025 mm, which mainly refers to the axial distance tolerance between the centers of the two positioning holes 20 and the shuttle tip plane 211 is within 0.025 mm.
[0042] Similarly, the position tolerance between the two positioning protrusions 30 and the highest point of the conductor surface 31 of the conductor plate 3 is within 0.025 mm, which can be understood as the axial distance tolerance between the center of the two positioning protrusions 30 and the highest point of the conductor surface 31 is within 0.025 mm.
[0043] The conductor surface 31 here is mainly composed of the top surface of the conductor plate 3, which is an arc-shaped curved surface structure. The highest point position of the conductor surface 31 can also be understood as the highest point position of the arc-shaped curved surface.
[0044] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention.
Claims
1. A fine wire hook, comprising a hook bed and a hook frame mounted on the hook bed and capable of rotating relative to the hook bed; a wire plate is mounted on the outer circumference of the hook bed by screws, characterized in that: The inner peripheral wall of the guide plate and the outer peripheral wall of the shuttle bed are provided with two positioning protrusions on one of them, and two positioning holes for inserting the two positioning protrusions on the other; when the two positioning protrusions are inserted into the two positioning holes at the same time, the guide plate and the shuttle bed maintain relative positioning.
2. A wire fine hook according to claim 1, characterized in that: Two positioning protrusions are arranged on the inner peripheral wall of the wire guide plate, and two positioning holes are opened on the outer peripheral wall of the shuttle bed.
3. The wire-carrying hook according to claim 1, characterized in that: The positioning protrusion is conical, and / or the positioning hole is cylindrical.
4. A wire fine hook according to claim 3, characterized in that: The positioning protrusion and the positioning hole are clearance-matched.
5. The wire-carrying hook according to claim 4, characterized in that: The diameter of the positioning hole is within 0.05 mm larger than the maximum outer circle diameter of the positioning protrusion.
6. The wire-carrying hook according to claim 1, characterized in that: The shuttle bed has a shuttle tip, and the top surface of the shuttle tip constitutes a shuttle tip plane; the position tolerance of the two positioning holes and the shuttle tip plane is within 0.025mm; the position tolerance of the two positioning protrusions and the highest point of the wire surface of the wire plate is within 0.025mm.
7. The wire-carrying hook according to claim 1, characterized in that: The two positioning protrusions are distributed in sequence along the circumference of the wire plate.
8. The wire-carrying hook according to claim 1, characterized in that: The guide wire plate is provided with a mounting hole for the screw to pass through, and the outer peripheral wall of the shuttle bed is provided with a screw hole for the screw thread connection corresponding to the mounting hole position. When the two positioning protrusions are inserted into the two positioning holes at the same time, the mounting hole and the screw hole are in a coaxial state.