A low-noise thread trimming mechanism for a thread trimming machine

Abstract

The present application discloses a low-noise wire cutting mechanism of a wire cutting machine, belonging to the technical field of wire cutting mechanisms, and includes a housing plate, an annular fixed knife, a willow leaf movable knife, an elastic telescopic member, and a push-pull electromagnet. The utility model is designed to have a swinging willow leaf movable knife in combination with an annular fixed knife structure, with blades on both sides of the willow leaf movable knife, and a blade on the inner edge of the elliptical hole of the annular fixed knife, so that the wire can be cut by swinging the willow leaf movable knife on one side. Compared with a reciprocating structure of a transmission, the utility model has the advantages of simple structure, rapid wire cutting action, and low noise.

Description

Technical Field

[0001] The present application relates to the technical field of thread trimming mechanisms, and in particular to a low-noise thread trimming mechanism of a thread trimming machine. Background Art

[0002] The automatic wire cutting mechanism of the wire cutting machine is one of the signs that the wire cutting machine has developed into an integrated, intelligent and efficient one. After one processing is completed, the wire is automatically cut without human intervention, which improves the working efficiency of the wire cutting machine and reduces the difficulty of operation.

[0003] A traditional single-direction push-pull electromagnet is used to drive the movable knife to cut the wire, and then the push-pull electromagnet and the movable knife are reset by relying on the spring action on the push-pull electromagnet. In this process, the movable knife reciprocates twice and the push-pull electromagnet moves twice, which generates a lot of noise. Therefore, the utility model provides a new low-noise wire cutting mechanism for a wire cutting machine. Summary of the invention

[0004] The purpose of the present application is to simplify the thread trimming mechanism of the thread trimming machine, improve the action efficiency of the thread trimming mechanism, and reduce the noise generated by the operation of the thread trimming machine.

[0005] In order to achieve the above objectives, the technical solution adopted in this application is:

[0006] A low-noise thread trimming mechanism of a thread trimming machine, comprising:

[0007] A housing plate, wherein a mounting ear is provided on a side of the housing plate;

[0008] An annular fixed knife, wherein a mounting hole is provided on the top surface of the housing plate, the annular fixed knife is fixedly installed on the inner side of the mounting hole, and an elliptical hole is provided at the center of the annular fixed knife;

[0009] The lancet blade is fixedly connected with a mounting column at the bottom center of the housing plate, and the lancet blade is rotatably mounted on the mounting column. The lancet blade corresponds to the elliptical hole, so that when the lancet blade is swung, the lancet blade can completely sweep under the area corresponding to the elliptical hole;

[0010] An elastic telescopic member, one end of which is rotatably mounted on the bottom end of the housing plate via a connecting column, a first connecting rod is fixedly connected to the side of the lancet, and an end of the first connecting rod is hinged to an end of the elastic telescopic member away from the connecting column;

[0011] A push-pull electromagnet, wherein the push-pull electromagnet is fixedly mounted on the housing plate, an end of the electromagnet core of the push-pull electromagnet is movably connected to a second connecting rod, and the other end of the second connecting rod is rotatably connected to the elastic telescopic member;

[0012] The inner edge of the elliptical hole of the annular fixed knife is provided with a blade, both sides of the scimitar movable knife are provided with blades, and the electromagnet core of the push-pull electromagnet acts in both directions.

[0013] As a preferred embodiment, it also includes:

[0014] A stabilizing frame, wherein the stabilizing frame is arc-shaped, and elastic pads are fixedly connected to both ends of the stabilizing frame;

[0015] A tightening screw, the bottom end of which passes through the housing plate, the elastic pad, and the stabilizing frame, and the tightening screw is threadedly connected to the stabilizing frame;

[0016] The lancet blade is located between the stabilizing frame and the shell plate.

[0017] As a preference, a gland is threadedly connected to the bottom end of the mounting post.

[0018] As a preferred embodiment, the elastic telescopic member comprises: a first frame, a second frame, a sliding seat and an elastic member;

[0019] The sliding seat is fixedly connected to the first frame, the second frame is slidably connected to the sliding seat, and the elastic member is arranged between the first frame and the second frame on the inner side of the sliding seat.

[0020] As another preferred embodiment, the push-pull electromagnet comprises:

[0021] The shell has a first coil and a second coil fixedly connected inside and near two ends of the shell, and an electromagnet core is slidably connected inside the shell.

[0022] Further preferably, an ear hole is provided on the side of the mounting ear.

[0023] Further preferably, the housing plate is annular.

[0024] Compared with the prior art, the beneficial effects of this application are:

[0025] (1) The utility model is designed with a swinging willow leaf movable knife and an annular fixed knife structure. Both sides of the willow leaf movable knife have blades, and the inner edge of the elliptical hole of the annular fixed knife has a blade. In this way, the willow leaf movable knife can be swung on one side to complete the cutting of the silk thread. Compared with the reciprocating structure of the transmission, it has the advantages of simple structure, rapid wire cutting action and low noise.

[0026] (2) The utility model is designed with a push-pull electromagnet for bidirectional action. It does not need an additional return spring. Two sets of coils (a first coil and a second coil) respectively drive the electromagnet core to move in two directions. That is, each time the wire is cut, the electromagnet core only needs to move once, which can reduce the noise generated by the movement of the electromagnet core. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 A first-perspective stereoscopic image of the low-noise thread trimming mechanism of the thread trimming machine;

[0028] Figure 2 A second perspective stereoscopic image of the low-noise thread trimming mechanism of the thread trimming machine;

[0029] Figure 3 A top view of the low-noise thread trimming mechanism of the thread trimming machine;

[0030] Figure 4 An exploded view of the elastic telescopic part of the low-noise thread trimming mechanism of the thread trimming machine;

[0031] Figure 5 It is a schematic diagram of the principle of the electromagnet structure of the low-noise thread trimming mechanism of the thread trimming machine.

[0032] In the figure: 1. shell plate; 2. mounting ear; 3. ear hole; 4. elliptical hole; 5. annular fixed knife; 6. mounting hole; 7. stabilizing frame; 8. elastic pad; 9. tightening screw; 10. willow leaf movable knife; 11. mounting column; 12. pressure cover; 13. first connecting rod; 14. connecting column; 15. elastic telescopic member; 151. first frame; 152. second frame; 153. sliding seat; 154. elastic member; 16. second connecting rod; 17. push-pull electromagnet; 171. shell; 172. first coil; 173. second coil; 174. electromagnet core. DETAILED DESCRIPTION

[0033] Below, the present application is further described in conjunction with specific implementation methods. It should be noted that, under the premise of no conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0034] In the description of the present application, it should be noted that directional words, such as the terms "center", "lateral", "longitudinal", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc., indicating directions and positional relationships are based on the directions or positional relationships shown in the accompanying drawings, which are only for the convenience of narrating the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and cannot be understood as limiting the specific scope of protection of the present application.

[0035] It should be noted that the terms "first", "second", etc. in the description and claims of the present application are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence.

[0036] The terms "including" and "having" and any variations thereof in the specification and claims of this application are intended to cover non-exclusive inclusions. For example, a process, method, system, product or apparatus comprising a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to these processes, methods, products or apparatuses.

[0037] like Figure 1-Figure 5 The low-noise thread trimming mechanism of the thread trimmer shown comprises: a housing plate 1 , an annular fixed knife 5 , a willow-leaf movable knife 10 , an elastic telescopic member 15 and a push-pull electromagnet 17 .

[0038] Among them, the shell plate 1 is annular, and the edge of the shell plate 1 is recessed downward, forming an installation area or protection area at the bottom of the shell plate 1, and a mounting ear 2 is provided on the side of the shell plate 1, and an ear hole 3 is provided on the side of the mounting ear 2, so that the shell plate 1 and the main structure of the wire shearing machine can be fixed together by screws or bolts. A mounting hole 6 is provided on the top surface of the shell plate 1, and the mounting hole 6 is circular. The annular fixed knife 5 is fixedly installed on the inner side of the mounting hole 6, and the outer side of the annular fixed knife 5 is circular. The outer side of the annular fixed knife 5 is installed in the mounting hole 6 by interference fit. An elliptical hole 4 is provided in the center of the annular fixed knife 5, and the long axis of the elliptical hole 4 passes through the center of the shell plate 1. The inner edge of the elliptical hole 4 of the annular fixed knife 5 has a blade, and a mounting column 11 is fixedly connected to the bottom center of the shell plate 1, and the scissor blade moving knife 10 is rotatably installed on the mounting column 11. The scissor blade moving knife 10 and the elliptical hole 4 are connected. Correspondingly, when the scimitar blade 10 swings, the scimitar blade 10 can completely sweep the area below the elliptical hole 4. During the swinging process of the scimitar blade 10, the scimitar blade 10 drives the silk thread close to the edge of the elliptical hole 4, and the silk thread is cut off by the blade on the scimitar blade 10 or the blade at the inner edge of the elliptical hole 4. The elastic telescopic part 15, one end of the elastic telescopic part 15 is rotatably installed with the bottom end of the shell plate 1 through the connecting column 14, the side of the scimitar blade 10 is fixedly connected with the first connecting rod 13, the end of the first connecting rod 13 is hinged with the end of the elastic telescopic part 15 away from the connecting column 14, the push-pull electromagnet 17 is fixedly installed with the shell plate 1, the end of the electromagnetic core 174 of the push-pull electromagnet 17 is movably connected with the second connecting rod 16, the other end of the second connecting rod 16 is rotatably connected with the elastic telescopic part 15, and the electromagnetic core 174 of the push-pull electromagnet 17 acts in both directions.

[0039] like Figure 2In the state shown, the elastic telescopic member 15 is in a naturally extended state, the first connecting rod 13 is not acted upon by any force, and all structures are stable; when the silk thread needs to be cut, the electromagnet core 174 of the push-pull electromagnet 17 contracts, and the pulling force is transmitted through the second connecting rod 16, pulling the elastic telescopic member 15 toward the position of the push-pull electromagnet 17, and the elastic telescopic member 15 rotates around the connecting column 14, and drives the first connecting rod 13 to rotate, thereby rotating the scissor blade 10 (the scissor blade 10 rotates to cut the silk thread). At this time, the elastic telescopic member 15 is compressed under the action of the first connecting rod 13 until the first connecting rod 13 and the elastic telescopic member 15 are in a straight line, and the elastic telescopic member 15 is compressed to the limit. When the rotation continues, the outward elastic force of the elastic telescopic part 15 drives the first connecting rod 13 to continue to rotate, so that the scissor blade 10 is still in a stable state after swinging a certain angle; the next action is to control the push-pull electromagnet 17 to push outward, so that the scissor blade 10 rotates in the opposite direction to complete the second cutting of the silk thread. When the electromagnet core 174 of the push-pull electromagnet 17 pushes outward, the thrust is transmitted by the second connecting rod 16, thereby making the first connecting rod 13 and the elastic telescopic part 15 rotate toward the middle. When the first connecting rod 13 and the elastic telescopic part 15 are collinear again, the elastic telescopic part 15 is compressed to the limit again, and the push-pull electromagnet 17 continues to push outward with a certain force, and the elastic telescopic part 15 elastically stretches, tending to make the scissor blade 10 swing a certain angle.

[0040] In one embodiment, it further includes: a stabilizing frame 7 and a tightening screw 9 .

[0041] The stabilizing frame 7 is arc-shaped, and elastic pads 8 are fixedly connected to both ends of the stabilizing frame 7. The bottom end of the tightening screw 9 passes through the shell plate 1, the elastic pad 8, and the stabilizing frame 7, and the tightening screw 9 is threadedly connected to the stabilizing frame 7. The scimitar blade 10 is located between the stabilizing frame 7 and the shell plate 1.

[0042] The stabilizing frame 7 restricts the movement of the scimitar blade 10 close to the annular fixed blade 5. After being used for a period of time, if the scimitar blade 10 is deformed, the user can tighten the adjusting screw 9 and appropriately pull up the stabilizing frame 7 (the stabilizing frame 7 compresses the elastic pad 8), that is, restrict the scimitar blade 10 upward to ensure that the scimitar blade 10 and the annular fixed blade 5 can cooperate well.

[0043] In one embodiment, a pressure cap 12 is threadedly connected to the bottom end of the mounting post 11 , and the pressure cap 12 is used to limit the lancet blade 10 to prevent the lancet blade 10 from falling off the mounting post 11 .

[0044] In one embodiment, the elastic member 15 includes a first frame 151 , a second frame 152 , a sliding seat 153 and an elastic member 154 .

[0045] The sliding seat 153 is fixedly connected to the first frame 151 , the second frame 152 is slidably connected to the sliding seat 153 , and the elastic member 154 is disposed between the first frame 151 and the second frame 152 on the inner side of the sliding seat 153 .

[0046] The outer ends of the first frame 151 and the second frame 152 serve as the two ends of the elastic telescopic member 15. Since the first frame 151 and the second frame 152 can press the elastic member 154 inward, the first frame 151 and the second frame 152 can slide elastically relative to each other.

[0047] In one embodiment, the push-pull electromagnet 17 includes: a shell 171 , a first coil 172 and a second coil 173 are fixedly connected inside the shell 171 near both ends, and an electromagnet core 174 is slidably connected inside the shell 171 .

[0048] When the first coil 172 is energized, it attracts the electromagnet core 174 and drives the electromagnet core 174 to move rightward (extending action). When the second coil 173 is energized, it attracts the electromagnet core 174 and drives the electromagnet core 174 to move leftward (retracting action).

[0049] The above describes the basic principles, main features and advantages of the present application. Those skilled in the art should understand that the present application is not limited by the above embodiments, and the above embodiments and the specification only describe the principles of the present application. The present application may have various changes and improvements without departing from the spirit and scope of the present application, and these changes and improvements fall within the scope of the present application for which protection is sought. The scope of protection claimed by the present application is defined by the attached claims and their equivalents.

Claims

1. A low-noise thread trimming mechanism for a thread trimming machine, characterized in that: include: A housing plate, wherein a mounting ear is provided on a side of the housing plate; An annular fixed knife, wherein a mounting hole is provided on the top surface of the housing plate, the annular fixed knife is fixedly installed on the inner side of the mounting hole, and an elliptical hole is provided at the center of the annular fixed knife; The lancet blade is fixedly connected with a mounting column at the bottom center of the housing plate, and the lancet blade is rotatably mounted on the mounting column. The lancet blade corresponds to the elliptical hole, so that when the lancet blade is swung, the lancet blade can completely sweep under the area corresponding to the elliptical hole; An elastic telescopic member, one end of which is rotatably mounted on the bottom end of the housing plate via a connecting column, a first connecting rod is fixedly connected to the side of the lancet, and an end of the first connecting rod is hinged to an end of the elastic telescopic member away from the connecting column; A push-pull electromagnet, wherein the push-pull electromagnet is fixedly mounted on the housing plate, an end of the electromagnet core of the push-pull electromagnet is movably connected to a second connecting rod, and the other end of the second connecting rod is rotatably connected to the elastic telescopic member; The inner edge of the elliptical hole of the annular fixed knife is provided with a blade, both sides of the scimitar movable knife are provided with blades, and the electromagnet core of the push-pull electromagnet acts in both directions.

2. The low-noise thread trimming mechanism of the thread trimming machine according to claim 1, characterized in that: Also includes: A stabilizing frame, wherein the stabilizing frame is arc-shaped, and elastic pads are fixedly connected to both ends of the stabilizing frame; A tightening screw, the bottom end of which passes through the housing plate, the elastic pad, and the stabilizing frame, and the tightening screw is threadedly connected to the stabilizing frame; The lancet blade is located between the stabilizing frame and the shell plate.

3. The low-noise thread trimming mechanism of a thread trimming machine according to claim 1, characterized in that: The bottom end of the mounting column is threadedly connected with a gland.

4. The low-noise thread trimming mechanism of the thread trimming machine according to claim 1, characterized in that: The elastic telescopic member comprises: a first frame, a second frame, a sliding seat and an elastic member; The sliding seat is fixedly connected to the first frame, the second frame is slidably connected to the sliding seat, and the elastic member is arranged between the first frame and the second frame on the inner side of the sliding seat.

5. The low-noise thread trimming mechanism of the thread trimming machine according to claim 1, characterized in that: The push-pull electromagnet comprises: The shell has a first coil and a second coil fixedly connected inside and near two ends of the shell, and an electromagnet core is slidably connected inside the shell.

6. The low-noise thread trimming mechanism of a thread trimmer according to claim 1, characterized in that: The side surface of the mounting ear is provided with an ear hole.

7. The low-noise thread trimming mechanism of a thread trimmer according to claim 1, characterized in that: The housing plate is annular.

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