Sewing machine rotating structure and sewing machine thereof

Abstract

The utility model provides a sewing machine rotating structure and a sewing machine thereof, and relates to the technical field of sewing machines. The sewing machine rotating structure comprises a driving mechanism, a transmission mechanism, a machine head and a base; the driving mechanism comprises a driving motor and a transmission shaft; the transmission shaft is connected with the output end of the driving motor; the transmission shaft is sleeved with the transmission mechanism, and the transmission end of the transmission mechanism is connected with the machine head and the base so that the machine head and the base can rotate along with the transmission shaft. The utility model provides a rotating structure of a sewing machine. The rotating structure is simple in structure and capable of achieving synchronous rotation of a machine head and a base.

Description

TECHNICAL FIELD

[0001] The present application relates to the sewing machine technical field, and particularly relates to a sewing machine rotating structure and a sewing machine. BACKGROUND

[0002] The sewing machine is a machine for forming one or more tracks on the sewing material by using one or more sewing threads, and interweaving or sewing one or more layers of the sewing material. However, during the sewing process of the sewing machine, the sewing contour may be a curve. In order to ensure that the movement direction of the needle shuttle of the sewing machine is always consistent with the extension direction of the sewing contour, the head and the base of the sewing machine need to be designed to be rotatable.

[0003] In the related art, different rotating mechanisms are respectively installed on the head and the base of the sewing machine to drive the head and the base to rotate. Meanwhile, in order to avoid the situation that the cables connected with the rotating mechanisms are wound with each other and damaged when the rotating mechanisms follow the rotation of the head or the base, a conductive slip ring is arranged outside each rotating mechanism to replace the cable.

[0004] However, the overall structure of the above-mentioned sewing machine is complex, and it is difficult to realize the synchronous rotation of the head and the base. Utility model content

[0005] Therefore, the present application provides a sewing machine rotating structure and a sewing machine, which are simple in structure and can realize the synchronous rotation of the head and the base.

[0006] To achieve the above-mentioned purpose, the present application provides the following technical solutions:

[0007] The present application provides a sewing machine rotating structure, which comprises a driving mechanism, a transmission mechanism, a head and a base.

[0008] The driving mechanism comprises a driving motor and a transmission shaft, and the transmission shaft is connected with the output end of the driving motor.

[0009] The transmission mechanism is sleeved on the transmission shaft, and the transmission end of the transmission mechanism is connected with the head and the base respectively, so that the head and the base rotate together with the transmission shaft.

[0010] In a possible implementation manner, the transmission mechanism comprises at least two driving wheels, a transmission belt and a driven wheel.

[0011] Each driving wheel is sleeved on the transmission shaft, the driven wheel is correspondingly arranged with each driving wheel, the transmission belt is wound on the driven wheel and the driving wheel, and the head and the base are respectively connected with each driven wheel to rotate with each driven wheel.

[0012] The sewing machine according to another aspect of the present application comprises a frame and the sewing machine rotating structure according to any one of the preceding aspects.

[0013] The frame is provided with a supporting mechanism for fixing the sewing machine rotating structure to the frame.

[0014] The sewing machine rotating structure further comprises a first connecting shaft and a second connecting shaft, and the head and the base are connected to the respective transmission mechanisms through the first connecting shaft and the second connecting shaft.

[0015] In a possible implementation, the frame is further provided with a limiting plate, which is installed above the transmission mechanism on the side close to the driving motor to limit the transmission mechanism.

[0016] In a possible implementation, a belt tensioning mechanism is further included.

[0017] The belt tensioning mechanism comprises a first locking plate and at least two connecting plates, the first locking plate is installed on the frame, and the first locking plate is provided with a sliding groove for clamping the connecting plates; the connecting plates are respectively connected to the two ends of the transmission mechanism, and the connecting plates are detachably connected to each other to adjust the distance between the connecting plates.

[0018] In a possible implementation, the frame is further provided with a belt limiting mechanism, which is located on at least one side of the belt tensioning mechanism.

[0019] The belt limiting mechanism comprises a second locking plate and a pressing plate, the second locking plate is detachably connected to the pressing plate, and the transmission belt is arranged between the second locking plate and the pressing plate.

[0020] In a possible implementation, the supporting mechanism comprises a first bearing, a second bearing, a third bearing and a fourth bearing, and the first bearing, the second bearing, the third bearing and the fourth bearing are fixed on the frame.

[0021] The first bearing is located between the head and the first connecting shaft, and the head is connected to the first connecting shaft through the first bearing, and the second bearing is sleeved on the first connecting shaft.

[0022] The third bearing is located between the base and the second connecting shaft, and the base is connected to the second connecting shaft through the third bearing, and the fourth bearing is sleeved on the second connecting shaft.

[0023] In a possible implementation, the support mechanism further comprises a first bearing seat, a second bearing seat and an adjusting assembly, the third bearing is arranged in the first bearing seat, and the fourth bearing is arranged in the second bearing seat.

[0024] The adjusting assembly is located at the outer circumferential side of the first bearing seat, and the adjusting assembly abuts against the first bearing seat to adjust the position of the first bearing seat relative to the rack.

[0025] In a possible implementation, the adjusting assembly comprises a support seat and an adjusting rod, the support seat is mounted on the rack, the adjusting rod is arranged in a threaded hole formed in the support seat, and the adjusting rod is threadedly connected with the support seat, the end of the adjusting rod abuts against the surface of the first bearing seat, so that the position of the first bearing seat is adjusted by the adjusting rod.

[0026] In a possible implementation, the support mechanism further comprises a fifth bearing, a sixth bearing and a mounting seat, the fifth bearing is fixed on the rack, the sixth bearing is fixed on the mounting seat, and the transmission shaft is connected with the output end of the driving motor in sequence through the fifth bearing and the sixth bearing;

[0027] The mounting seat is internally arranged with the transmission mechanism close to the driving motor.

[0028] In a possible implementation, the rack is further provided with a sensor baffle, the sensor baffle is electrically connected with the driving motor, and the sensor baffle is used to monitor the transmission state of the transmission mechanism.

[0029] The sewing machine provided by the application comprises a driving mechanism, a transmission mechanism, a head and a base.

[0030] When the sewing machine faces a curved sewing contour during the sewing process, the driving motor drives the transmission shaft, and then drives the transmission mechanism sleeved on the transmission shaft; at the same time, since the transmission ends of the transmission mechanism are connected with the head and the base respectively, the head and the base can rotate together with the transmission shaft, and the rotation angle of the head and the base can also be controlled by the number of rotation circles of the transmission shaft, so as to ensure that the movement direction of the needle and the shuttle of the sewing machine is always consistent with the extension direction of the sewing contour.

[0031] Compared with the adjustment mode of the head and the base in the prior art, the sewing machine rotating structure provided by the application has a relatively simple overall structure and is easy to maintain, and during the automatic adjustment process, the rotation angle of the head and the base can be accurately controlled, thereby improving the adjustment efficiency of the head and the base. BRIEF DESCRIPTION OF DRAWINGS

[0032] The specific embodiments of the present application are described in detail below with reference to the accompanying drawings, it should be understood that the specific embodiments described herein are merely intended for explanation and interpretation of the present application, and the present application is not limited to the specific embodiments described below.

[0033] Figure 1 A structural schematic diagram of a sewing machine rotating structure provided for an embodiment of the present application is shown in the figure.

[0034] Figure 2 An exploded structural schematic diagram of a sewing machine rotating structure provided for an embodiment of the present application is shown in the figure.

[0035] Figure 3 A structural schematic diagram of a sewing machine provided for an embodiment of the present application is shown in the figure.

[0036] Explanation of reference signs:

[0037] 100 - driving mechanism;

[0038] 110 - driving motor; 120 - transmission shaft;

[0039] 200 - transmission mechanism;

[0040] 210 - driving wheel; 220 - transmission belt; 230 - driven wheel;

[0041] 300 - machine head;

[0042] 400 - base;

[0043] 500 - machine frame;

[0044] 510 - supporting mechanism;

[0045] 511 - first bearing; 512 - second bearing; 513 - third bearing; 514 - fourth bearing; 515 - first bearing seat; 516 - second bearing seat; 517 - fifth bearing; 518 - sixth bearing; 519 - mounting seat;

[0046] 520 - adjusting assembly;

[0047] 521 - supporting seat; 522 - adjusting rod;

[0048] 530 - limiting plate;

[0049] 540 - sensor baffle;

[0050] 550 - belt limiting mechanism;

[0051] 551 - second locking plate; 552 - pressing plate;

[0052] 600 - first connecting shaft;

[0053] 700 - second connecting shaft

[0054] 800 - belt tensioning mechanism

[0055] 810 - first locking plate; 820 - connecting plate

[0056] The specific embodiments of the application have been shown by way of example in the above figures, and will be described in more detail hereafter. These figures and this written description are not intended to limit the scope of the inventive concept in any way, but are merely to illustrate specific embodiments of the inventive concept to a person skilled in the art. DETAILED DESCRIPTION

[0057] In order to make the objects, technical solutions and advantages of the present application clearer, the technical solutions in the present application and how the technical solutions in the present application solve the above technical problems will be described clearly and completely below in conjunction with specific embodiments and the accompanying drawings in the present application. Obviously, the described embodiments are only some embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative effort belong to the scope of protection of the present application.

[0058] In the description of the present application, it should be noted that, unless otherwise explicitly specified and limited, the terms “mounting”, “connection”, “connecting” should be understood in a broad sense, for example, can be fixed connection, can be indirect connection through an intermediate medium, can be the internal communication of two elements or the interaction relationship between two elements. For a person of ordinary skill in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0059] In the description of the present application, it should be understood that the terms “upper”, “lower”, “front”, “rear”, “vertical”, “horizontal”, “top”, “bottom”, “inner”, “outer” and the like indicate the orientation or positional relationship shown in the drawings, and are only used to facilitate the description of the present application and simplify the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0060] The terms “first”, “second”, “third”, “fourth” and the like (if any) in the specification of the present application and claims and the above drawings are used to distinguish similar objects, and do not necessarily have to describe a particular order or sequence. It should be understood that the data thus used can be interchanged under appropriate circumstances, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein.

[0061] In the embodiments of the present application, the terms "exemplary" or "for example" are used to mean "an example of" or "an example, not necessarily the only example of. Any embodiment or design solution described as "exemplary" or "for example" in the present application should not be construed as preferred or advantageous over other embodiments or design solutions. Rather, the use of "exemplary" or "for example" is intended to present concepts in a particular manner.

[0062] In addition, the terms "comprising" and "having" and any variations thereof are intended to cover the non-exclusive inclusion, for example, a process, method, system, product, or apparatus that includes a series of steps or units does not have to be limited to only those steps or units clearly listed, but can include other steps or units that are not clearly listed or inherent to these processes, methods, products, or apparatuses.

[0063] A sewing machine is a machine that uses one or more sewing threads to form one or more tracks on a sewing material, so as to interweave or sew one or more layers of the sewing material. However, during the sewing process of the sewing machine, the sewing contour may be a curve. In order to ensure that the movement direction of the needle shuttle of the sewing machine is always consistent with the extension direction of the sewing contour, the head and the base of the sewing machine need to be designed to be rotatable.

[0064] In the related art, different rotating mechanisms are respectively installed on the head and the base of the sewing machine to drive the head and the base to rotate. At the same time, in order to avoid the situation that the cables connected to the rotating mechanisms are entangled with each other when the rotating mechanisms follow the rotation of the head or the base, causing damage to the cables, a conductive slip ring is arranged outside each rotating mechanism to replace the cables.

[0065] However, the overall structure of the above-mentioned sewing machine is complex, and it is difficult to realize the synchronous rotation of the head and the base.

[0066] Based on this, the present application provides a rotating structure of a sewing machine and a sewing machine thereof, which comprises a driving mechanism, a transmission mechanism, a head, and a base, wherein the driving mechanism comprises a driving motor and a transmission shaft.

[0067] When the sewing machine faces a curve as the sewing contour during the sewing process, the driving motor drives the transmission shaft, and then drives the transmission mechanism sleeved on the transmission shaft. At the same time, since the transmission end of the transmission mechanism is connected with the head and the base respectively, the head and the base can rotate together with the transmission shaft, and the rotation angle of the head and the base can also be controlled by the number of rotations of the transmission shaft, so as to ensure that the movement direction of the needle shuttle of the sewing machine is always consistent with the extension direction of the sewing contour.

[0068] Compared with the adjustment mode of the machine head and the base in the prior art, the sewing machine rotating structure provided in the application has a relatively simple overall structure and is easy to maintain, and during automatic adjustment, the rotation angles of the machine head and the base can be accurately controlled, thereby improving the adjustment efficiency of the machine head and the base.

[0069] The technical solutions of the application will be described in detail below with reference to specific embodiments and in combination with the drawings. The following specific embodiments can be combined with each other, and the same or similar concepts or processes can not be described in detail in some embodiments.

[0070] Reference Figure 1 and Figure 2 As shown in the figure, the embodiment of the application provides a sewing machine rotating structure, which comprises a driving mechanism 100, a transmission mechanism 200, a machine head 300 and a base 400; the driving mechanism 100 comprises a driving motor 110 and a transmission shaft 120, and the transmission shaft 120 is connected with the output end of the driving motor 110; the transmission mechanism 200 is sleeved on the transmission shaft 120, and the transmission ends of the transmission mechanism 200 are respectively connected with the machine head 300 and the base 400, so that the machine head 300 and the base 400 rotate together with the transmission shaft 120.

[0071] In the embodiment of the application, when the sewing machine faces a curved sewing contour during sewing, the driving motor 110 drives the transmission shaft 120, thereby driving the transmission mechanism 200 sleeved on the transmission shaft 120; at the same time, since the transmission ends of the transmission mechanism 200 are respectively connected with the machine head 300 and the base 400, the machine head 300 and the base 400 can rotate together with the transmission shaft 120, and the rotation angles of the machine head 300 and the base 400 can also be controlled by the number of rotations of the transmission shaft 120, so as to ensure that the movement direction of the needle shuttle of the sewing machine and the extension direction of the sewing contour always remain consistent.

[0072] Compared with the adjustment mode of the machine head 300 and the base 400 in the prior art, the sewing machine rotating structure provided in the application has a relatively simple overall structure and is easy to maintain, and during automatic adjustment, the rotation angles of the machine head 300 and the base 400 can be accurately controlled, thereby improving the adjustment efficiency of the machine head 300 and the base 400.

[0073] Reference Figure 2 As shown in the figure, in some embodiments, the transmission mechanism 200 comprises at least two driving wheels 210, a transmission belt 220 and a driven wheel 230; each driving wheel 210 is sleeved on the rotating shaft 120, the driven wheel 230 is provided correspondingly with each driving wheel 210, the transmission belt 220 is wound on the driven wheel 230 and the driving wheel 210, and the machine head 300 and the base 400 are respectively connected with each driven wheel 230 to rotate with each driven wheel 230.

[0074] It can be understood that the specific structure of the transmission mechanism 200 is not limited in the present application, as long as it can transmit the kinetic energy of the driving motor 110 and drive the head 300 and the base 400 to rotate together. Specifically, in the above embodiment, the transmission mechanism 200 is composed of a driving wheel 210, a transmission belt 220 and a driven wheel 230, and the whole uses a belt transmission driving mode, which is simple in structure and easy to maintain.

[0075] At the same time, since the head 300 and the base 400 are connected with the respective driven wheels 230, according to the characteristics of the belt transmission, the rotation angle of each driven wheel 230 is consistent with that of each driving wheel 210 or even the transmission shaft 120, thereby ensuring that the relative positions of the head 300 and the base 400 always remain consistent, avoiding the need for the staff to control and adjust the rotation angles of the head 300 and the base 400 respectively, which affects the adjustment efficiency of the head 300 and the base 400.

[0076] Reference Figure 2 and Figure 3 As shown in the above embodiment, the present application further provides a sewing machine, which comprises a rack 500 and a sewing machine rotating structure; the rack 500 is provided with a supporting mechanism 510 to fix the sewing machine rotating structure on the rack 500; the sewing machine rotating structure further comprises a first connecting shaft 600 and a second connecting shaft 700, and the head 300 and the base 400 are connected with the respective transmission mechanisms 200 through the first connecting shaft 600 and the second connecting shaft 700.

[0077] In the specific implementation, the head 300 and the base 400 are connected with the respective driven wheels 230 through the first connecting shaft 600 and the second connecting shaft 700. Since the rack 500 itself has a certain height, and each driven wheel 230 is located at the top or bottom of the rack 500, in order to enable the head 300 and the base 400 to be in contact with the sewing material and perform the sewing operation, in the above embodiment, the first connecting shaft 600 and the second connecting shaft 700 are added, and the first connecting shaft 600 and the second connecting shaft 700 are used as a transmission bridge, thereby extending the extension distance of the head 300 and the base 400 to contact with the sewing material.

[0078] Among them, the structure of the sewing machine rotating structure in the embodiment of the present application and the structure of the sewing machine rotating structure provided by any of the above embodiments are the same, and can bring the same or similar technical effects, which will not be described one by one here, and the specific description can be referred to the description of the above embodiments.

[0079] Reference Figure 2 As shown in the above embodiment, in some embodiments, the rack 500 is further provided with a limiting plate 530, which is installed above the transmission mechanism 200 on the side close to the driving motor 110 to limit the transmission mechanism 200.

[0080] In a specific implementation, the number of the limiting plates 530 is set to at least two, and each limiting plate 530 is installed above the transmission wheel 210 and the driven wheel 230 near the driving motor 110, so as to limit the rotation angle of the transmission wheel 210 and the driven wheel 230.

[0081] During the sewing process of the sewing machine, the operator needs to repeatedly adjust the orientation of the head 300 and the base 400 according to the extension direction of the sewing contour. The operation of the head 300 and the base 400 requires a connection cable. In order to avoid the situation that the connection cable is wound and damaged due to the excessive rotation angle of the head 300 and the base 400 during the adjustment process, the rotation angle range of the head 300 and the base 400 is generally limited to 720 degrees, i.e. 360 degrees in each of the left and right directions. Therefore, in the above embodiment, the limiting plate 530 is added to mechanically limit the transmission wheel 210 and the driven wheel 230 near the driving motor 110, so as to control the rotation angle range of the transmission wheel 210 and the driven wheel 230 within 720 degrees.

[0082] Reference Figure 2 As shown in the drawings, in some embodiments, a belt tensioning mechanism 800 is further included; the belt tensioning mechanism 800 includes a first locking plate 810 and at least two connecting plates 820. The first locking plate 810 is installed on the rack 500, and a sliding groove is formed on the first locking plate 810 for clamping each connecting plate 820. Each connecting plate 820 is connected to both ends of the transmission mechanism 200, and each connecting plate 820 is detachably connected between the connecting plates 820, so as to adjust the spacing between the connecting plates 820.

[0083] In a specific implementation, each connecting plate 820 is connected to both ends of the transmission belt 220. During use, the transmission belt 220 is in a tensioned state for a long time, so that the overall elasticity of the transmission belt 220 decreases and becomes loose, which is easy to slip when connected to the transmission wheel 210 or the driven wheel 230, resulting in the inability to accurately control the rotation angle of the head 300 and the base 400. Therefore, in the above embodiment, the belt tensioning mechanism 800 is added, the spacing between the connecting plates 820 is adjusted, the loosening state of the transmission belt 220 is improved, the connection between the transmission belt 220 and the transmission wheel 210 and the driven wheel 230 always maintains a certain pre-tightening force, the slipping condition is avoided, and the adjustment efficiency of the head 300 and the base 400 is improved.

[0084] Further, referring to Figure 2As shown, in some embodiments, the rack 500 is further provided with a belt limiting mechanism 550 located at least on one side of the belt tensioning mechanism 800; the belt limiting mechanism 550 comprises a second locking plate 551 and a pressing plate 552, the second locking plate 551 is detachably connected with the pressing plate 552, and the transmission belt 220 is arranged between the second locking plate 551 and the pressing plate 552.

[0085] Here, the belt limiting mechanism 550 is added to mechanically limit the position of the transmission belt 220, and by controlling the movement distance of the transmission belt 220, the rotation angle range of the transmission wheel 210 and the driven wheel 230 is limited within 720 degrees.

[0086] Reference Figure 2 As shown, in some embodiments, the support mechanism 510 comprises a first bearing 511, a second bearing 512, a third bearing 513 and a fourth bearing 514, and the first bearing 511, the second bearing 512, the third bearing 513 and the fourth bearing 514 are fixed on the rack 500; the first bearing 511 is located between the head 300 and the first connecting shaft 600, the head 300 is connected with the first connecting shaft 600 through the first bearing 511, and the second bearing 512 is sleeved on the first connecting shaft 600; the third bearing 513 is located between the base 400 and the second connecting shaft 700, the base 400 is connected with the second connecting shaft 700 through the third bearing 513, and the fourth bearing 514 is sleeved on the second connecting shaft 700.

[0087] During the sewing process of the sewing machine, there are cases where the sewing contour is a curve, and the operator needs to repeatedly adjust the orientation of the head 300 and the base 400 according to the extension direction of the sewing contour, and during this period, the first connecting shaft 600 and the second connecting shaft 700 are prone to collide with the rack 500. Therefore, in the above embodiments, the first bearing 511 and the second bearing 512 are added between the first connecting shaft 600 and the rack 500, and the third bearing 513 and the fourth bearing 514 are added between the second connecting shaft 700 and the rack 500, so as to protect the first connecting shaft 600, the second connecting shaft 700 and the rack 500.

[0088] Further, reference Figure 2 As shown, in some embodiments, the support mechanism 510 further comprises a first bearing seat 515, a second bearing seat 516 and an adjusting assembly 520, the first bearing seat 515 internally contains the third bearing 513, and the second bearing seat 516 internally contains the fourth bearing 514; the adjusting assembly 520 is located on the outer circumferential side of the first bearing seat 515, and the adjusting assembly 520 abuts against the first bearing seat 515 to adjust the position of the first bearing seat 515 relative to the rack 500.

[0089] In the sewing process of the sewing machine, the head 300 and the base 400 need to be coaxial at all times, but over time, the base 400 inevitably deviates to varying degrees due to factors such as vibration of the frame 500, resulting in poor sewing effect of the sewing machine, or even inability to perform sewing operations. Therefore, in the above embodiment, the adjusting assembly 520 is added to adjust the position of the base 400 in real time at any time, ensuring that the sewing machine can operate normally.

[0090] Further, referring to Figure 2 In some embodiments, the adjusting assembly 520 includes a support seat 521 and an adjusting rod 522. The support seat 521 is installed on the frame 500, the adjusting rod 522 is threaded into the threaded hole provided in the support seat 521, and the adjusting rod 522 is threadedly connected with the support seat 521. The end of the adjusting rod 522 abuts against the surface of the first bearing seat 515 to adjust the position of the first bearing seat 515 through the adjusting rod 522.

[0091] It can be understood that the specific structure of the adjusting assembly 520 is not limited in the present application, as long as it can push or pull the base 400 and move it relative to the frame 500. Specifically, in the above embodiment, the adjusting assembly 520 is composed of the support seat 521 and the adjusting rod 522, which is simple in structure and easy to maintain.

[0092] In specific implementation, the staff can rotate the adjusting rod 522 in the corresponding direction according to the deviation direction of the base 400, and the adjusting rod 522 abuts against and pushes the base 400 to move, so that the base 400 returns to the original position.

[0093] Referring to Figure 2 In some embodiments, the supporting mechanism 510 further includes a fifth bearing 517, a sixth bearing 518, and a mounting seat 519. The fifth bearing 517 is fixed on the frame 500, the sixth bearing 518 is fixed on the mounting seat 519, and the transmission shaft 120 is connected with the output end of the driving motor 110 in sequence through the fifth bearing 517 and the sixth bearing 518. The mounting seat 519 internally contains the transmission mechanism 200 close to the driving motor 110 side.

[0094] In specific implementation, the mounting seat 519 internally contains the transmission wheel 210 close to the driving motor 110 side. Here, the fifth bearing 517 and the sixth bearing 518 are also added to avoid the transmission shaft 120 from colliding with the frame 500 during rotation, thereby protecting the transmission shaft 120 and the frame 500. The mounting seat 519 can also protect the transmission wheel 210 close to the driving motor 110 side.

[0095] Referring to Figure 2As shown, in some embodiments, the rack 500 is further provided with a sensor baffle 540, which is electrically connected with the driving motor 110, and is used to monitor the transmission state of the transmission mechanism 200.

[0096] In a specific implementation, the sensor baffle 540 is electrically connected with the driving motor 110, and is used to monitor the rotation angle of the transmission wheel 210 and the driven wheel 230.

[0097] Here, the sensor baffle 540 is added to monitor the rotation angle of the transmission wheel 210 and the driven wheel 230, and the rotation angle range of the transmission wheel 210 and the driven wheel 230 is controlled within 720 degrees. In a specific implementation, when the rotation angle of the transmission wheel 210 and the driven wheel 230 exceeds 720 degrees, the sensor baffle 540 sends an electrical signal to the driving motor 110 to control the driving motor 110 to be closed, so as to protect the cable.

[0098] The above detailed description does not constitute a limitation on the protection scope of the present application. Those skilled in the art should understand that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modification, equivalent replacement and improvement made within the principles of the present application should be included in the protection scope of the present application.

Claims

1. A sewing machine characterized by comprising: The sewing machine rotating structure comprises a driving mechanism (100), a transmission mechanism (200), a head (300) and a base (400). The driving mechanism (100) comprises a driving motor (110) and a transmission shaft (120), and the transmission shaft (120) is connected with the output end of the driving motor (110). The transmission mechanism (200) is sleeved on the transmission shaft (120), and the transmission ends of the transmission mechanism (200) are connected with the head (300) and the base (400) respectively, so that the head (300) and the base (400) rotate together with the transmission shaft (120). The sewing machine rotating structure further comprises a first connecting shaft (600) and a second connecting shaft (700), and the head (300) and the base (400) are connected with the transmission mechanism (200) through the first connecting shaft (600) and the second connecting shaft (700) respectively. The rack (500) is further provided with a sensor baffle (540), the sensor baffle (540) is electrically connected with the driving motor (110), and the sensor baffle (540) is used for monitoring the transmission state of the transmission mechanism (200). The rack (500) is further provided with a limiting plate (530), the limiting plate (530) is installed above the transmission mechanism (200) on the side close to the driving motor (110), so as to limit the transmission mechanism (200). The belt tensioning mechanism (800) comprises a first locking plate (810) and at least two connecting plates (820), the first locking plate (810) is installed on the rack (500), and a sliding groove is formed in the first locking plate (810) for clamping each connecting plate (820); each connecting plate (820) is connected with two ends of the transmission mechanism (200) respectively, and each connecting plate (820) is detachably connected between each connecting plate (820), so as to adjust the distance between each connecting plate (820).

2. The sewing machine according to claim 1, characterized in that, The rack (500) is further provided with a belt limiting mechanism (550), and the belt limiting mechanism (550) is located on one side of the belt tensioning mechanism (800).

3. The sewing machine of claim 1, wherein, The belt limiting mechanism (550) comprises a second locking plate (551) and a pressing plate (552), the second locking plate (551) and the pressing plate (552) are detachably connected, and the transmission mechanism (200) is arranged between the second locking plate (551) and the pressing plate (552). ​ 4. The sewing machine of claim 3, wherein ​ ​ 5. The sewing machine of claim 1, wherein, The support mechanism (510) comprises a first bearing (511), a second bearing (512), a third bearing (513) and a fourth bearing (514), and the first bearing (511), the second bearing (512), the third bearing (513) and the fourth bearing (514) are all fixed on the rack (500); The first bearing (511) is located between the head (300) and the first connecting shaft (600), the head (300) is connected with the first connecting shaft (600) through the first bearing (511), and the second bearing (512) is sleeved on the first connecting shaft (600); The third bearing (513) is located between the base (400) and the second connecting shaft (700), the base (400) is connected with the second connecting shaft (700) through the third bearing (513), and the fourth bearing (514) is sleeved on the second connecting shaft (700).

6. The sewing machine of claim 5, wherein, The support mechanism (510) further comprises a first bearing seat (515), a second bearing seat (516) and an adjusting assembly (520), the first bearing seat (515) contains the third bearing (513), and the second bearing seat (516) contains the fourth bearing (514); The adjusting assembly (520) is located on the outer circumferential side of the first bearing seat (515), and the adjusting assembly (520) is in abutment with the first bearing seat (515) to adjust the position of the first bearing seat (515) relative to the rack (500).

7. The sewing machine of claim 6, wherein, The adjusting assembly (520) comprises a support seat (521) and an adjusting rod (522), the support seat (521) is installed on the rack (500), the adjusting rod (522) is threaded into the threaded hole formed in the support seat (521), and the adjusting rod (522) is in threaded connection with the support seat (521), the end of the adjusting rod (522) is in abutment with the surface of the first bearing seat (515), so that the position of the first bearing seat (515) is adjusted through the adjusting rod (522).

8. The sewing machine of claim 1, wherein, The support mechanism (510) further comprises a fifth bearing (517), a sixth bearing (518) and a mounting seat (519), the fifth bearing (517) is fixed on the rack (500), the sixth bearing (518) is fixed on the mounting seat (519), and the transmission shaft (120) is connected with the output end of the driving motor (110) in sequence through the fifth bearing (517) and the sixth bearing (518); The mounting seat (519) contains the transmission mechanism (200) close to the side of the driving motor (110).

9. The sewing machine of claim 1, wherein, The transmission mechanism (200) comprises at least two driving wheels (210), a transmission belt (220) and a driven wheel (230). Each of the driving wheels (210) is sleeved on the transmission shaft (120), each of the driven wheels (230) is arranged correspondingly to each of the driving wheels (210), the transmission belt (220) is arranged around the driven wheels (230) and the driving wheels (210), and the machine head (300) and the base (400) are connected with each of the driven wheels (230) respectively to rotate with each of the driven wheels (230).

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