Rotary machine head structure of sewing machine

Abstract

The rotating machine head structure comprises a machine head arm, a rotating machine head and a rotating device, and the rotating device comprises a synchronizing wheel, a lower fixing plate, an upper fixing plate, an anti-winding pipe, a plurality of spring wires and a plurality of plugs; the plugs are annularly and symmetrically installed on the lower fixing plate and the upper fixing plate up and down, the plugs corresponding to the lower fixing plate and the upper fixing plate up and down are connected through spring wires, the upper end of the anti-winding pipe is fixedly connected with the upper fixing plate, the lower end of the anti-winding pipe is rotationally connected with the lower fixing plate, and the lower fixing plate is fixedly connected with the upper plane of the synchronous wheel. An electrifying part of the rotating machine head is connected with an electric cabinet wire through a spring wire, so that the rotating head achieves the same function as a rotating head provided with a conductive slip ring within a certain angle; the conductive slip ring can basically cover 80% of sewing curves, is another choice for garment manufacturing, and has the key points that the cost is lower, the fault risk of the conductive slip ring is avoided, and the conductive slip ring has greater influence on market promotion. The cost is low and later maintenance is not needed.

Description

Technical Field

[0001] The invention relates to the technical field of sewing machines, and in particular to a rotary head structure of a sewing machine. Background Art

[0002] Since the rotary sewing machine was put into use, the number of machines used has increased rapidly each year due to its characteristics of no reverse stitching and less thread breakage. However, due to its high cost and high cost of use, it has not been fully promoted. The cost of the conductive slip ring accounts for about 10% of the components of the rotary sewing machine. If other products can be used to replace the conductive slip ring, the cost investment of the rotary sewing machine can be greatly reduced, thereby increasing the cost performance. Therefore, it is necessary to improve the existing technical defects. Summary of the invention

[0003] The purpose of the present invention is to solve the problems raised in the above background technology and to provide a rotating head structure of a sewing machine.

[0004] To achieve the above-mentioned purpose, the technical scheme of the present invention is as follows: a rotary head structure of a sewing machine, comprising a head arm and a rotary head; a rotating device is arranged between the head arm and the rotary head, and the rotating device comprises a synchronous wheel, a lower fixed plate, an upper fixed plate, an anti-winding tube, a plurality of spring wires, and a plurality of plugs; the plurality of plugs are symmetrically mounted on the lower fixed plate and the upper fixed plate in an annular shape, and the corresponding plugs on the lower and upper fixed plates are connected by spring wires, the upper fixed plate is fixedly mounted on the head arm, the upper end of the anti-winding tube is fixedly connected to the upper fixed plate, and the lower end is rotatably connected to the lower fixed plate, and the lower fixed plate is fixedly connected to the upper plane of the synchronous wheel; the rotary head is synchronously rotatably connected with the synchronous wheel, and when the motor in the sewing machine drives the synchronous wheel through the synchronous belt, it can simultaneously drive the rotary head to rotate back and forth arbitrarily along the rotating plane relative to the head arm; the synchronous wheel rotates forward or reversely under the drive of the motor, the upper fixed plate and the anti-winding tube remain stationary, the rotary head rotates synchronously with the synchronous wheel together with the lower fixed plate, and the plurality of spring wires are stretched around the anti-winding tube, and the spring wires return to their original state when the synchronous wheel returns to its original angle.

[0005] In the above-mentioned rotating head structure of a sewing machine, the middle part of the spring wire is in the shape of a spiral spring, has good extensibility, can stretch and increase the length under the action of rotational pulling force, and can automatically reset in the absence of pulling force. The wire cores on the leads at both ends of the spring wire are welded and fixed to the welding points on the plugs on the upper and lower fixing plates; the anti-winding tube is located in the middle position of a plurality of spring wires to prevent the wires from being entangled with each other during rotation.

[0006] In the above-mentioned rotating head structure of a sewing machine, a bearing is installed at the rotation center position of the lower fixed plate, and the anti-winding tube is connected to the bearing, thereby being rotationally connected to the lower fixed plate through the bearing.

[0007] In the above-mentioned rotary head structure of a sewing machine, the rotary head is connected to the head arm through a rotary bearing, and the synchronous wheel is installed above the rotary bearing and located in the inner cavity of the head arm.

[0008] In the above-mentioned rotary head structure of a sewing machine, the lower fixing plate is fixedly connected to the outer ring of the bearing, and the anti-winding tube is fixedly connected to the inner ring of the bearing.

[0009] In the above-mentioned rotating head structure of a sewing machine, the outer ring of the rotating bearing is fixed to the mounting surface of the head arm, and the synchronous wheel and the rotating head are respectively fixedly connected to the inner ring of the rotating bearing. When the synchronous wheel is driven, it can drive the rotating head to rotate, and the interior of the synchronous wheel is a hollow structure.

[0010] In the above-mentioned rotating head structure of a sewing machine, the anti-winding tube is a cylindrical component, the lower end of the anti-winding tube is installed on the inner ring of the bearing, and the upper end of the anti-winding tube is provided with a threaded hole, which is connected to the through hole on the upper fixed plate by a screw; an air channel for transmitting gas is provided inside the anti-winding tube, and threaded parts and threaded parts are provided at both ends of the air channel, an air pipe joint is installed through the threaded part, and a rotating air joint is installed through the threaded part.

[0011] In the above-mentioned rotary head structure of a sewing machine, the lower fixing plate and the upper positioning plate are disc-shaped objects, and a plurality of circular holes and circular holes are respectively opened on the planes of the lower fixing plate and the upper positioning plate for installing the plug.

[0012] In the above-mentioned rotating head structure of a sewing machine, the plug is an aviation plug.

[0013] In the above-mentioned rotary head structure of a sewing machine, the rotary air joint can be connected to the air pipe, and the other end of the air pipe is connected to the ventilation device on the rotary head. When the rotary head rotates, the air pipe drives the rotating part on the rotary air joint to rotate, thereby preventing the air pipe from being entangled.

[0014] By adopting the above technical solution, the present invention has the following beneficial effects: The present invention uses a spring wire to connect the energized parts of the rotating head with the wiring of the electric control box, so that the rotating head can achieve the same function as the rotating head installed with a conductive slip ring within a certain angle, but the cost is about 10% lower than that of the traditional conductive slip ring; compared with the ordinary template sewing machine, the structure of the present invention can realize the rotation of the head within a certain angle, and achieve sewing stitches and consistency, which is impossible for ordinary template sewing machines; compared with the conductive slip ring rotating head sewing machine, although it cannot rotate unlimitedly, it can basically cover 80% of the sewing curves, which is another choice for clothing manufacturing. The key is that its cost is low, and there is no risk of failure of the conductive slip ring through the elastic flexible wire, which has a greater impact on market promotion. The conductive slip ring also needs to be replaced after a certain period of wear and tear, and the maintenance cost is high. The spring wire of the present invention is low in cost, does not require post-maintenance, and does not require waterproofing, oil-proofing and other measures, and is more convenient to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 , Figure 2 is a stereogram of the present invention; Figure 3 This is an exploded view of the present invention Figure 4 , Figure 5 It is a stereogram of two different states of the rotating head in the present invention; Figure 6 It is a three-dimensional diagram of the partial structure of the rotating device in the present invention; Figure 7 It is a three-dimensional diagram of the partial structure of the rotating device in the present invention; DETAILED DESCRIPTION

[0016] The present invention will be further described in conjunction with the accompanying drawings.

[0017] See also Figures 1 to 7The present invention provides a rotary head structure of a sewing machine, comprising a head arm 1 and a rotary head 2; a rotating device is arranged between the head arm 1 and the rotary head 2, and the rotating device comprises a synchronous wheel 3, a lower fixed plate 4, an upper fixed plate 5, an anti-winding tube 8, a plurality of spring wires 7, and a plurality of plugs 6; the plurality of plugs 6 are annularly and symmetrically installed on the lower fixed plate 4 and the upper fixed plate 5, and the plugs 6 are preferably aviation plugs, and the corresponding plugs on the lower fixed plate 4 and the upper fixed plate 5 are connected by spring wires 7. The upper fixed plate 5 is fixedly installed on the machine head arm 1, the upper end of the anti-winding tube 8 is fixedly connected to the upper fixed plate 5, and the lower end is rotatably connected to the lower fixed plate 4, and the lower fixed plate 4 is fixedly connected to the upper plane of the synchronous wheel 3; the rotating head 2 is rotatably connected to the synchronous wheel 3, and when the motor in the sewing machine drives the synchronous wheel 3 through the synchronous belt, it can simultaneously drive the rotating head 2 to rotate back and forth relative to the machine head arm 1 along the rotating plane; the synchronous wheel 3 rotates forward or reversely under the drive of the motor, the upper fixed plate 5 and the anti-winding tube 8 remain stationary, the rotating head 2 rotates synchronously with the synchronous wheel 3 together with the lower fixed plate 4, and a number of spring wires 7 are stretched around the anti-winding tube 8, and the spring wires 7 return to their original state when the synchronous wheel 3 returns to its original angle.

[0018] Furthermore, the middle part of the spring wire 7 is in the shape of a spiral spring, has good extensibility, can stretch and increase the length under the action of rotational tension, and can automatically reset in the absence of tension. The wire cores on the leads at both ends of the spring wire 7 are welded and fixed to the welding points on the plugs on the upper and lower fixing plates; the anti-winding tube 8 is located in the middle position of several spring wires 7 to prevent the wires from being entangled with each other during rotation.

[0019] Furthermore, a bearing 10 is installed at the rotation center of the lower fixed plate 4 , and the anti-winding tube 8 is connected to the bearing 10 , thereby being rotationally connected to the lower fixed plate 4 through the bearing 10 .

[0020] Furthermore, the rotating head 2 is connected to the head arm 1 via a rotating bearing 9 , and the synchronous wheel 3 is installed above the rotating bearing 9 and is located in the inner cavity of the head arm 1 .

[0021] Furthermore, the lower fixing plate 4 is fixedly connected to the outer ring of the bearing 10 , and the anti-winding tube 8 is fixedly connected to the inner ring of the bearing 10 .

[0022] Furthermore, the outer ring of the rotary bearing 9 is fixed to the mounting surface of the machine head arm 1, and the synchronous wheel 3 and the rotary machine head 2 are respectively fixedly connected to the inner ring of the rotary bearing 9. When the synchronous wheel 3 is driven, it can drive the rotary machine head 2 to rotate, and the interior of the synchronous wheel 3 is a hollow structure.

[0023] Furthermore, the anti-winding tube 8 is a cylindrical component, the lower end portion 802 of the anti-winding tube 8 is installed on the inner ring of the bearing 10, and the upper end of the anti-winding tube 8 is provided with a threaded hole 805, which is connected to the through hole on the upper fixing plate 5 by screws; the anti-winding tube 8 is provided with an air channel 801 for transmitting gas inside, and threaded portions 803 and 804 are provided at both ends of the air channel 801, an air pipe joint 11 is installed through the threaded portion 803, and a rotary air joint 12 is installed through the threaded portion 804.

[0024] Furthermore, the lower fixing plate 4 and the upper positioning plate 5 are disc-shaped objects, and a plurality of circular holes 401 and circular holes 501 are respectively provided on the planes of the lower fixing plate 4 and the upper positioning plate 5 for installing the plug 6 .

[0025] Furthermore, the rotating air joint 12 can be connected to an air pipe, and the other end of the air pipe is connected to the ventilation device on the rotating head 2. When the rotating head 2 rotates, the air pipe drives the rotating part on the rotating air joint 12 to rotate, thereby preventing the air pipe from being entangled.

[0026] The present invention is further described below: During operation, the rotating head 2 can rotate arbitrarily along the rotating plane relative to the head arm 1. When the motor drives the synchronous wheel 3 through the synchronous belt, it can simultaneously drive the rotating head 2 to rotate reciprocatingly. The synchronous wheel 3 rotates forward or reversely under the drive of the motor. The upper fixed plate 5 and the anti-winding tube 8 remain stationary. The rotating head 2 rotates synchronously with the synchronous wheel 3 and the lower fixed plate 4. A number of spring wires 7 are stretched around the anti-winding tube 8. When the synchronous wheel 3 returns to its original angle, the spring wires 7 return to their original state.

[0027] The aviation plug on the upper fixed plate 5 is matched and connected through the corresponding plug on the connecting line to realize the transmission of power and signals with the electronic control system; the aviation plug on the lower fixed plate 4 is matched through the corresponding plug on the wire of the corresponding electrical equipment on the rotating head 2, and finally the electrical equipment on the rotating head 2 is finally connected with the electronic control system.

[0028] The above is a detailed introduction to the rotating head structure of a sewing machine provided by an embodiment of the present invention. Specific examples are used herein to illustrate the principle and implementation mode of the present invention. The description of the above embodiments is only used to help understand the technical solution disclosed by the present invention. At the same time, for those skilled in the art, according to the idea of ​​the present invention, there will be changes in the specific implementation mode and application scope. In summary, the content of this specification should not be understood as a limitation of the present invention.

Claims

1. A rotary head structure of a sewing machine, comprising a head arm (1) and a rotary head (2); characterized in that: A rotating device is provided between the machine head arm (1) and the rotating machine head (2), and the rotating device comprises a synchronous wheel (3), a lower fixed plate (4), an upper fixed plate (5), an anti-winding tube (8), a plurality of spring wires (7), and a plurality of plugs (6); the plurality of plugs (6) are symmetrically mounted on the lower fixed plate (4) and the upper fixed plate (5) in a ring shape, and the corresponding plugs on the lower fixed plate (4) and the upper fixed plate (5) are connected via spring wires (7). The upper fixed plate (5) is fixedly mounted on the machine head arm (1); the upper end of the anti-winding tube (8) is fixedly connected to the upper fixed plate (5) and the lower end is rotationally connected to the lower fixed plate (4); the lower fixed plate (4) is fixedly connected to the upper plane of the synchronous wheel (3); the rotating machine head (2) is synchronously connected to the synchronous wheel (3); when the motor in the sewing machine drives the synchronous wheel (3) through the synchronous belt, it can simultaneously drive the rotating machine head (2) to rotate back and forth relative to the machine head arm (1) along the rotating plane; the synchronous wheel (3) rotates forward or reversely under the drive of the motor, the upper fixed plate (5) and the anti-winding tube (8) remain stationary, the rotating head (2) rotates synchronously with the synchronous wheel (3) together with the lower fixed plate (4), a plurality of spring wires (7) are stretched around the anti-winding tube (8), and when the synchronous wheel (3) returns to its original angle, the spring wires (7) return to their original state.

2. The rotary head structure of a sewing machine according to claim 1, characterized in that: The middle part of the spring wire (7) is in the shape of a spiral spring and has good extensibility. It can stretch and increase its length under the action of a rotating pulling force, and can automatically reset when there is no pulling force. The wire cores on the leads at both ends of the spring wire (7) are welded and fixed to the welding points on the plugs on the upper and lower fixing plates; the anti-winding tube (8) is located in the middle of the plurality of spring wires (7) to prevent the wires from being entangled with each other during rotation.

3. The rotary head structure of a sewing machine according to claim 1, characterized in that: A bearing (10) is installed at the rotation center of the lower fixed plate (4), and the anti-winding tube (8) is connected to the bearing (10), thereby being rotationally connected to the lower fixed plate (4) through the bearing (10).

4. The rotary head structure of a sewing machine according to claim 1, characterized in that: The rotating machine head (2) is connected to the machine head arm (1) via a rotating bearing (9), and the synchronous wheel (3) is installed above the rotating bearing (9) and is located in the inner cavity of the machine head arm (1).

5. The rotary head structure of a sewing machine according to claim 3, characterized in that: The lower fixing plate (4) is fixedly connected to the outer ring of the bearing (10), and the anti-winding tube (8) is fixedly connected to the inner ring of the bearing (10).

6. The rotary head structure of a sewing machine according to claim 4, characterized in that: The outer ring of the rotary bearing (9) is fixed to the mounting surface of the machine head arm (1), and the synchronous wheel (3) and the rotary machine head (2) are respectively fixedly connected to the inner ring of the rotary bearing (9). When the synchronous wheel (3) is driven, it can drive the rotary machine head (2) to rotate, and the interior of the synchronous wheel (3) is a hollow structure.

7. A rotary head structure for a sewing machine according to claim 3 or 5, characterized in that: The anti-winding tube (8) is a cylindrical component. The lower end portion (802) of the anti-winding tube (8) is mounted on the inner ring of the bearing (10). The upper end of the anti-winding tube (8) is provided with a threaded hole (805) which is connected to the through hole on the upper fixing plate (5) by means of screws. The anti-winding tube (8) is provided with an air passage (801) for transmitting gas inside. The air passage (801) is provided with a threaded portion (803) and a threaded portion (804) at both ends. An air pipe joint (11) is mounted through the threaded portion (803), and a rotary air joint (12) is mounted through the threaded portion (804).

8. The rotary head structure of a sewing machine according to claim 1, characterized in that: The lower fixing plate (4) and the upper positioning plate (5) are disc-shaped objects, and a plurality of circular holes (401) and circular holes (501) are respectively provided on the planes of the lower fixing plate (4) and the upper positioning plate (5) for mounting the plug (6).

9. The rotary head structure of a sewing machine according to claim 8, characterized in that: The plug (6) is an aviation plug.

10. The rotary head structure of a sewing machine according to claim 7, characterized in that: The rotary air joint (12) can be connected to an air pipe, and the other end of the air pipe is connected to a ventilation device on the rotary head (2). When the rotary head (2) rotates, the air pipe is driven to rotate, and the air pipe drives the rotating part on the rotary air joint (12) to rotate, thereby preventing the air pipe from being entangled.

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