Machine head structure and sewing machine

Abstract

The utility model relates to a machine head structure and a sewing machine, and belongs to the technical field of sewing machines, the machine head structure comprises a machine head, a connecting seat, a supporting arm and an air supply assembly, the air supply assembly comprises a rod part and a first connector, an air supply channel is constructed in the rod part along the length direction of the rod part, and a first communication part and a second communication part are constructed on the side surface of the rod part; the first communication part and the second communication part are respectively communicated with the air supply channel; the rod component is arranged in the vertical channel and connected to the machine head or the connecting base. The first connector is provided with an inlet used for being connected with an air pipe, the first connector is arranged on the rod component in a sleeving mode and fixed to the supporting arm, the rod component can rotate relative to the first connector, and the inlet and the first communicating part are kept in a communicating state; the machine head structure is more optimized, the problem of stable communication between the air cylinder on the machine head and the air source equipment can be solved with lower cost, the air pipe can be protected, the service life of the air pipe can be prolonged, and the subsequent maintenance cost can be reduced.

Description

Technical Field

[0001] This utility model relates to the field of sewing machine technology, specifically to a sewing machine head structure and a sewing machine. Background Technology

[0002] Sewing machines come in various structures, among which computerized sewing machines with freely rotatable heads are common. These machines typically include a sewing platform, a support arm mounted on the platform, a sewing head, and a motor. The sewing head is usually connected to a connecting seat, which is rotatably connected to the support arm via bearings. The motor is connected to the connecting seat to drive the sewing head's rotation. The support arm is connected to the sewing platform to support the sewing head. The sewing platform has a rotary hook mechanism adapted to the sewing head, with the sewing head positioned above it. In actual use, the motor can drive the sewing head to rotate freely under the control of the controller to meet the sewing needs of different stitches. Meanwhile, existing sewing machine heads typically also include a needle bar mechanism, a needle bar drive mechanism, a presser foot, and a presser foot drive mechanism. The needle bar mechanism includes a needle bar with a machine needle mounted at its lower end. The needle bar drive mechanism is connected to the needle bar drive to drive the machine needle to perform up-and-down piercing movements, thus achieving the sewing function. The presser foot drive mechanism is connected to the presser foot drive and is used to transmit power to the presser foot, allowing it to be raised or lowered as needed. The presser foot is used to hold down the fabric during sewing, preventing it from moving and ensuring neat sewing stitches.

[0003] In existing sewing machines, the needle bar drive mechanism typically uses a drive motor to provide driving force; while the presser foot drive mechanism is usually equipped with a cylinder, which is connected to the presser foot to drive it to lift or lower. The presser foot in a sewing machine can include only a standard presser foot or an intermediate presser foot, and the cylinder can be one or multiple. Due to the cylinder configuration, air needs to be supplied to the cylinder during actual operation. However, in existing technologies, the cylinder is usually located at the machine head and rotates synchronously with it, while the air source equipment (such as an air compressor) used to supply air to the cylinder is usually located far from the machine head. This poses a challenge to the connection between the cylinder and the air source equipment in sewing machines where the machine head can rotate arbitrarily. In existing technologies, dedicated rotary joints (such as air slip rings) are typically used to connect the cylinder to the air source device. However, in practice, on the one hand, the cost of rotary joints is relatively high, which greatly increases the cost of the entire sewing equipment. Moreover, once the existing rotary joints wear out and leak air, they usually have to be replaced as a whole, resulting in high subsequent maintenance costs. On the other hand, due to space limitations, in actual assembly, rotary joints can usually only be installed in the connecting seat. This not only makes the assembly structure complex, but also makes the air pipes connecting the air source device prone to contact with the rotating connecting seat, causing wear on the air pipes. This problem urgently needs to be solved. Utility Model Content

[0004] In the first aspect of the present utility model, to solve the above technical problems, a head structure with an optimized structure is provided, which can solve the problem of stable connection between the upper cylinder of the head and the gas source device at a low cost. The main idea is as follows:

[0005] A head structure includes a head, a connecting seat, and a support arm for bearing. The connecting seat is configured with a vertical channel. The connecting seat is rotatably connected to the support arm. The head is connected to the connecting seat. The vertical channel corresponds to the top of the head. It further includes a gas supply component. The gas supply component includes a rod member arranged vertically and a first connector. The rod member is internally configured with a gas supply channel along its length direction. On the side surface of the rod member, a first communication part and a second communication part are arranged at intervals along the length direction of the rod member. The first communication part and the second communication part are respectively connected to the gas supply channel. The rod member is arranged in the vertical channel and is connected to the head or the connecting seat. The first connector is configured with an inlet for connecting an air pipe. The first connector is sleeved on the rod member and fixed to the support arm. The rod member can rotate relative to the first connector, and during the rotation process, the inlet and the first communication part always maintain a connected state. In this solution, by arranging the rod member in the vertical channel and connecting it to the head or the connecting seat, the rod member can rotate synchronously with the head and the connecting seat without relative rotation. By configuring the rod member and internally constructing a gas supply channel along its length direction, and arranging a first communication part and a second communication part at intervals along the length direction of the rod member on the side surface of the rod member, so as to guide the external pressurized gas into the interior of the connecting seat or the head along the vertical direction by using the rod member. Not only is the gas supply process not affected by the rotation of the head, making the cylinder on the head stably connected to the gas source device, but also compared with the existing rotary joint, the structure of this gas supply component is simpler and the cost is lower. By configuring the first connector, sleeving the first connector on the rod member, and fixing it to the support arm, the rod member can rotate relative to the first connector, and during the rotation process, the inlet and the first communication part always maintain a connected state, so as to stably achieve continuous gas supply, and the gas supply process will not be disturbed by the rotation of the head, achieving the purpose of stable gas supply. By arranging the first communication part and the second communication part at intervals along the length direction of the rod member, the first communication part and the first connector can be arranged above the connecting seat, which can not only make full use of the space above the connecting seat, but also be more convenient for connecting the external air pipe. The second communication part can be arranged below the connecting seat, closer to the head, so as to connect the air pipe on the head, which not only makes the assembly structure simpler and more convenient for assembly operation, but also makes each component far away from each other, and the upper air pipe can be located outside the upper part of the connecting seat, and the lower air pipe can be located outside the lower part of the connecting seat, which is not only more convenient for separately replacing each component, conducive to reducing the subsequent maintenance cost, but also the upper air pipe is less likely to contact the connecting seat, so it is less likely to be worn, which is conducive to protecting the air pipe.

[0006] Preferably, the rotation center of the rod member and the nose is coaxial; the first mounting hole is coaxial with the rotation center of the nose. This is conducive to achieving a better sealing effect.

[0007] Preferably, a communication port is formed at the top of the nose, and the vertical channel is connected to the communication port. This not only facilitates assembly but also facilitates wiring and pipeline layout.

[0008] In the second aspect of the present utility model, the problem that the inlet and the first communication part always remain in a connected state needs to be solved. Further, the first connector is provided with a first mounting hole penetrating through both ends, the inlet is connected to the first mounting hole, the inner diameter of the first mounting hole is larger than the outer diameter of the rod member, the first connector is sleeved on the rod member through the first mounting hole, and a circumferential channel is formed between the inner side wall of the first mounting hole and the rod member. The first communication part is connected to the circumferential channel, and the inlet is connected to the circumferential channel. Since the circumferential channel is a ring structure, during the rotation of the rod member relative to the first connector, the inlet can always be connected to the air supply channel through the circumferential channel and the first communication part, so as to smoothly supply air to the air supply channel without being interfered by the rotation of the rod member.

[0009] To prevent air leakage between the first connector and the rod member, further, sealing structures are respectively provided at both ends of the first connector, and the two sealing structures are respectively used to seal both sides of the circumferential channel. Thus, effectively preventing air leakage between the first connector and the rod member.

[0010] Preferably, the sealing structure includes an annular sealing ring and a sealing ring groove formed at the end of the first connector, and the inner diameter of the sealing ring groove is larger than the inner diameter of the first mounting hole; the sealing ring is arranged in the sealing ring groove, the inner side of the sealing ring abuts against the outer surface of the rod member, and the outer side of the sealing ring abuts against the ring surface of the sealing ring groove corresponding to the rod member. Thus, the gap between the first connector and the rod member is eliminated, and the purpose of sealing one side of the circumferential channel is achieved.

[0011] Preferably, the first communication part includes a communication hole formed in the rod member, the communication hole is connected to the air supply channel, and the communication hole is connected to the first mounting hole; and / or, the first communication part includes an annular groove formed on the outer surface of the rod member, the air supply channel is connected to the annular groove, and the circumferential channel is formed between the bottom of the annular groove and the inner side wall of the first mounting hole. This not only has a simpler structure but also can ensure the air passing volume. In addition, it is more conducive to achieving a better sealing effect.

[0012] The third aspect of this invention addresses the problem of facilitating both air supply and the transmission of power and signals to the sewing machine head. Further, it includes a slip ring disposed in the vertical channel. The slip ring has a central channel through which the rod component passes. A first connector is located above the slip ring, and a second connecting portion is located below it. In this solution, by configuring the slip ring between the first connector and the second connecting portion, and allowing the rod component to pass through the slip ring via the central channel, not only can the air supply assembly stably supply air to the sewing machine head without interference from the machine head's rotation, but the slip ring can also stably transmit power and signals during the machine head's rotation. This results in a more compact, optimized, and stable overall sewing machine head structure, solving the problem of requiring more assembly space when simultaneously configuring both air slip rings and slip rings in existing sewing machines.

[0013] Preferably, the collector ring includes a rotating part and a stationary part. The rotating part is constructed as a cylinder, and a central channel inside the cylinder passes through the upper and lower ends of the rotating part. The stationary part is fitted onto the cylinder of the rotating part, and the rotating part can rotate relative to the stationary part. The stationary part is connected to the support arm, and the rotating part is connected to the connecting seat or the machine head.

[0014] Furthermore, the upper end of the cylinder extends into a stationary portion, and the side of the cylinder has a through hole; the first connecting portion includes an annular groove formed on the outer surface of the rod component, and the air supply channel communicates with the annular groove; the rod component is sealed to the cylinder, and the through hole communicates with the annular groove; the first connector has a first mounting hole penetrating both ends, the inner diameter of the first mounting hole being larger than the outer diameter of the cylinder, the first connector being fitted onto the outside of the cylinder through the first mounting hole, and an annular channel being formed between the inner wall of the first mounting hole and the cylinder, the through hole communicating with the annular channel, and the inlet communicating with the annular channel. The inlet is connected to the air supply channel via the annular channel, the through hole, and the annular groove, so that during the rotation of the cylinder relative to the first connector, the inlet is always connected to the air supply channel, so as to smoothly supply air to the air supply channel without being disturbed by rotation.

[0015] To prevent air leakage between the first connector and the cylinder, sealing structures are further provided at both ends of the first connector. These two sealing structures are used to seal both sides of the circumferential channel. Each sealing structure includes an annular sealing ring and a sealing ring groove formed at the end of the first connector. The inner diameter of the sealing ring groove is larger than the inner diameter of the first mounting hole. The sealing ring is disposed within the sealing ring groove, with its inner side abutting against the outer surface of the cylinder and its outer side abutting against the annular surface of the cylinder corresponding to the sealing ring groove. This eliminates the gap between the first connector and the cylinder, achieving the purpose of sealing one side of the circumferential channel.

[0016] To reduce the manufacturing difficulty and cost of the second connecting part, a second connector is further included. The second connector has an outlet, is sealed to the rod component, and the outlet communicates with the second connecting part. By configuring the second connector to connect the air tube, and since the second connecting part is only used for air passage, the structure of the air port in the rod component can be effectively simplified, which not only facilitates assembly but also helps to reduce manufacturing difficulty and cost.

[0017] Preferably, the second connector has a second mounting hole for adapting to the rod component, the second mounting hole communicating with the outlet; the second connecting portion includes an annular groove formed on the outer surface of the rod component, the air supply channel communicating with the annular groove, and the second connector being fitted onto the rod component through the second mounting hole, covering the annular groove. This not only allows the outlet to communicate with the air supply channel via the annular groove, but also allows multiple outlets to be machined along the circumference of the second connector, each outlet communicating adjacently with the annular groove, thereby enabling the output of multiple gas paths to simultaneously meet the air demand of multiple cylinders, thus effectively improving versatility.

[0018] A sewing machine includes a sewing platform and a head structure, wherein a support arm is fixed to the sewing platform; it also includes a motor, which is connected to a connecting seat via a transmission mechanism to drive the head to rotate.

[0019] Compared with the prior art, the sewing machine head structure and sewing machine provided by this utility model have a more optimized structure. It can not only solve the problem of stable connection between the cylinder and the air source equipment on the sewing machine head at a lower cost, but also help protect the air pipe, improve the service life of the air pipe, and reduce subsequent maintenance costs. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a partial cross-sectional view of a machine head structure provided in Embodiment 1 of this utility model.

[0022] Figure 2 for Figure 1 A magnified view of a section at point I.

[0023] Figure 3 for Figure 2 Sectional view at point AA.

[0024] Figure 4 for Figure 1 A magnified view of section II in the middle.

[0025] Figure 5 This is a partial cross-sectional view of another head structure provided in Embodiment 1 of this utility model.

[0026] Figure 6 for Figure 1 A magnified view of section III in the middle.

[0027] Figure 7 for Figure 5 Sectional view at point BB.

[0028] Figure 8 This is a schematic diagram of a collector ring provided in Embodiment 2 of this utility model.

[0029] Figure 9 This is a partial cross-sectional view of a machine head structure provided in Embodiment 2 of this utility model.

[0030] Figure 10 This is a partial cross-sectional view of another head structure provided in Embodiment 2 of this utility model.

[0031] Figure 11 for Figure 1 A magnified view of section IV in the middle.

[0032] Figure 12 for Figure 11 Sectional view at point CC.

[0033] Figure 13 This is a partial structural diagram of a sewing machine provided in Embodiment 3 of this utility model.

[0034] The markings in the diagram are as follows: Support arm 1, motor 11, transmission mechanism 12, connector 13; Connecting seat 2, outer sleeve 21, flange 22, vertical channel 23, bearing 24; Machine head 3, air supply assembly 31, air pipe 32; Rod component 4, air supply channel 41, first connecting part 42, second connecting part 43, annular groove 44; First connector 5, first mounting hole 51, inlet 52, annular channel 53, sealing ring groove 54, sealing ring 55; Second connector 6, second mounting hole 61, outlet 62; Stationary part 71, rotating part 72, cylinder 73, intermediate channel 74, through hole 75; Sewing platform 8, frame 81, platform 82. Detailed Implementation

[0035] Example 1

[0036] This embodiment provides a sewing machine head structure, including a support arm 1 for support, a connecting seat 2, and a sewing machine head 3. The support arm 1 is typically connected to a sewing platform 8 for suspending the sewing machine head 3, and the support arm 1 is typically a hollow structure. Figure 1 As shown, this is to make full use of the internal space of the support arm 1.

[0037] In this embodiment, the connecting seat 2 is rotatably connected to the support arm 1 so that the motor 11 can drive the connecting seat 2 to rotate. Simultaneously, the machine head 3 is connected to the lower end of the connecting seat 2. Figure 1 As shown, this allows the sewing head 3 to engage with the lower sewing head 3 on the lower sewing platform 8 for sewing. In practice, the connecting seat 2 can be connected to the support arm 1 via one or more sets of bearings 24, such as... Figure 1 or Figure 5 As shown, this allows the connecting seat 2 to have a degree of freedom of rotation relative to the support arm 1. In implementation, the connecting seat 2 is constructed with a vertical channel 23 for accommodating electrical wiring. For example, the connecting seat 2 includes an outer sleeve 21 and a flange 22 connected to the lower end of the outer sleeve 21, with the vertical channel 23 formed within the outer sleeve 21. Figure 1 or Figure 5 As shown, the machine head 3 includes a frame for support and a housing connected to the outside of the frame. The upper end of the frame is detachably connected to the flange 22 by fasteners such as bolts or screws. Figure 1 or Figure 5 As shown, this allows the connecting seat 2 and the machine head 3 to be connected as a single unit and operate synchronously. In practice, the center of the vertical channel 23 can be coaxial with both the rotation center of the connecting seat 2 and the rotation center of the machine head 3; the rotation center of the machine head 3 preferably coincides with the geometric center of the machine head 3.

[0038] In this embodiment, the structure and function of the machine head 3 can be the same as in the prior art. For example, in a more complete embodiment, the frame of the machine head 3 is further provided with a needle bar mechanism, a needle bar drive mechanism, a presser foot, a presser foot drive mechanism, etc., wherein the presser foot drive mechanism is equipped with a cylinder, and the cylinder is connected to the presser foot for transmission, so as to drive the presser foot to lift or lower using the cylinder; the cylinder is set on the frame of the machine head 3, and the cylinder rotates synchronously with the frame. Therefore, the structure of the machine head 3 provided in this embodiment also includes an air supply assembly 31 for more stable air supply to the cylinder on the machine head 3. The air supply assembly 31 includes a rod component 4 and a first connector 5, such as... Figure 1 or Figure 5 As shown, the rod component 4 is preferably constructed as a straight pipe. An air supply channel 41 is constructed within the rod component 4 along its length. A first connecting portion 42 and a second connecting portion 43 are constructed on the side of the rod component 4. The first connecting portion 42 and the second connecting portion 43 are respectively connected to the air supply channel 41. In implementation, the air supply channel 41 can be constructed at the center of the rod component 4 or at a position offset from the center of the rod component 4. Figure 1 or Figure 5 As shown, the rod component 4 is vertically arranged and fixedly connected to the machine head 3 or the connecting seat 2, so that the rod component 4 rotates synchronously with the connecting seat 2 and the machine head 3. It can be understood that, in implementation, the rod component 4 can be directly fixedly connected to the machine head 3 or the connecting seat 2, or indirectly connected to the machine head 3 or the connecting seat 2 through connecting parts 13 such as a base plate or bracket. In implementation, the rod component 4 is preferably made of a round tube, which is more conducive to reducing the moment of inertia.

[0039] It is understood that in this embodiment, both ends of the air supply channel 41 are sealed to prevent air leakage.

[0040] In this embodiment, the first connecting portion 42 and the second connecting portion 43 are arranged at intervals along the length direction of the rod component 4, as follows: Figure 1 or Figure 5 As shown, in implementation, the first connecting portion 42 is preferably constructed above the connecting seat 2 or at a position corresponding to the upper part of the connecting seat 2, such as... Figures 1-3 As shown, this allows the upper air pipe 32 to be connected at a position further away from the machine head 3, avoiding mutual interference and wear, and facilitating assembly and disassembly; correspondingly, the second connecting part 43 is preferably constructed below the connecting seat 2 or at a position corresponding to the lower part of the connecting seat 2, such as... Figure 1 and Figure 4 As shown, this allows the lower air pipe 32 to be connected closer to the engine head 3, preventing mutual interference and wear, and facilitating connection of the cylinders on the engine head 3.

[0041] Accordingly, the sewing machine also includes a first connector 5, which has a first mounting hole 51 for the adapter rod component 4 and an inlet 52 communicating with the first mounting hole 51, such as... Figures 1-3 As shown, inlet 52 is used to connect to air pipe 32, which connects to an air source device (such as an air compressor); the inner diameter of the first mounting hole 51 is larger than the outer diameter of the rod component 4. During assembly, the first connector 5 is fitted onto the rod component 4 through the first mounting hole 51, achieving a clearance fit, allowing the rod component 4 to rotate relative to the first connector 5; as shown... Figure 1 and Figure 2 As shown, the first connector 5 is fixed to the support arm 1, so that the first connector 5 will not rotate with the machine head 3. The first connecting part 42 corresponds to the side wall of the first mounting hole 51, as shown. Figure 2 and Figure 3 As shown, a circumferential channel 53 is formed between the first connector 5 and the rod component 4. The first connecting part 42 is connected to the circumferential channel 53. At this time, the first connecting part 42 can preferably use a radially arranged connecting hole, and the inlet 52 is also connected to the circumferential channel 53, as shown. Figure 2 and Figure 3As shown, during the rotation of the rod component 4 relative to the first connector 5, the inlet 52 can always be connected to the air supply channel 41 through the circumferential channel 53 and the first connecting part 42, so as to smoothly supply air to the air supply channel 41 without being disturbed by the rotation of the rod component 4. In order to prevent air leakage between the first connector 5 and the rod component 4, in a more perfect embodiment, sealing structures are provided at both ends of the first connector 5. The two sealing structures are used to seal both sides of the circumferential channel 53, thereby effectively preventing air leakage between the first connector 5 and the rod component 4.

[0042] It is understandable that, during implementation, the first connector 5 can be directly fixed to the support arm 1, or indirectly fixed to the support arm 1 through connectors 13 such as the top plate and bracket, for example... Figure 1 and Figure 2 As shown.

[0043] In practice, the circumferential channel 53 can be implemented in various ways. For example, in one implementation, the inner diameter of the first mounting hole 51 is configured to be larger than the outer diameter of the rod member 4, such as... Figure 2 and Figure 3 As shown, an annular gap exists between the sidewall of the first mounting hole 51 and the outer surface of the rod component 4. This gap not only prevents the first connector 5 from contacting the rod component 4, but also forms an annular channel 53. In another embodiment, the first connecting portion 42 includes an annular groove 44 formed on the outer surface of the rod component 4. The air supply channel 41 communicates with the annular groove 44. After assembly, the bottom of the annular groove 44 corresponds to the sidewall of the first mounting hole 51, thereby forming an annular channel 53 between the bottom of the annular groove 44 and the sidewall of the first mounting hole 51.

[0044] In implementation, the sealing structure can be implemented in various ways. For example, the sealing structure can use an existing dynamic sealing structure to achieve a seal between the first connector 5 and the rod component 4. Alternatively, in this embodiment, the sealing structure includes an annular sealing ring 55 and a sealing ring groove 54 constructed at the end of the first connector 5. The inner diameter of the sealing ring groove 54 is larger than the inner diameter of the first mounting hole 51. Figure 2 and Figure 3 As shown, a step is formed inside the first connector 5; the sealing ring 55 is elastic, such as Figure 2 and Figure 3 As shown, the sealing ring 55 is disposed within the sealing ring groove 54. The inner side of the sealing ring 55 abuts against the outer surface of the rod component 4, and the outer side of the sealing ring 55 abuts against the annular surface of the sealing ring groove 54 corresponding to the rod component 4. Figure 2As shown, the sealing ring 55 is in a compressed state, forming a pre-tightening pressure between the contact surfaces of the sealing ring 55 and the rod component 4, and between the sealing ring 55 and the first connector 5, in order to eliminate the gap between the first connector 5 and the rod component 4, thereby achieving the purpose of sealing one side of the circumferential channel 53. In actual use, the cooperation of the two sealing structures can achieve sealing on both sides of the circumferential channel 53, significantly improving airtightness.

[0045] In practice, the sealing ring 55 can be fixed in the sealing ring groove 54 with adhesive. In addition, the sealing structure also includes a cover plate, which is fixed to the end of the first connector 5 so as to limit and constrain the sealing ring 55 in the sealing ring groove 54, which can effectively prevent the sealing ring 55 from falling off.

[0046] In a preferred embodiment, the rod component 4 is coaxial with the rotation center of the machine head 3, and the first mounting hole 51 is also coaxial with the rotation center of the machine head 3, such as... Figures 1-3 As shown, this not only allows the first connector 5 and the rod component 4 to achieve a better sealing effect, but also helps protect the sealing ring 55 and improve its service life. However, in actual implementation, due to manufacturing and assembly errors, it is permissible for the center of the rod component 4 to deviate slightly from the rotation center of the machine head 3, or for the center of the first mounting hole 51 to deviate slightly from the rotation center of the machine head 3. In this case, due to the setting of the sealing ring 55, a good sealing effect can still be maintained even with a small offset. This will not be elaborated further here.

[0047] It is understandable that since the rod component 4 rotates synchronously with the machine head 3, the air pipe 32 between the rod component 4 and the cylinder on the machine head 3 will not rotate relative to each other. Therefore, in one embodiment, the air pipe 32 can be directly connected through the lower second mounting hole 61, such as... Figure 1 and Figure 4 As shown, the air pipe 32 is connected to the cylinder on the machine head 3. Of course, in practice, a connector can also be connected at the second mounting hole 61 to connect the air pipe 32, which is more convenient.

[0048] In another preferred embodiment, the sewing machine further includes a second connector 6, such as Figure 5 and Figure 6As shown, the second connector 6 has a second mounting hole 61 adapted to the rod component 4 and an outlet 62 communicating with the second mounting hole 61. The outlet 62 is used to connect to the air pipe 32, which is connected to the cylinder. In implementation, the inner diameter of the second mounting hole 61 is preferably larger than the outer diameter of the rod component 4 so that the second connector 6 can be fitted onto the rod component 4 through the second mounting hole 61. An adhesive can be placed between the second connector 6 and the rod component 4, which not only fixes the second connector 6 to the rod component 4, allowing the second connector 6 and the rod component 4 to rotate synchronously, but also achieves a seal between the second connector 6 and the rod component 4, preventing air leakage from the gap between the second connector 6 and the rod component 4. At this time, the outlet 62 communicates with the second connecting part 43 to achieve communication between the outlet 62 and the air supply channel 41, and thus communication between the outlet 62 and the inlet 52. At this time, the second connecting part 43 can be a radially arranged connecting hole. In addition, during implementation, the inner diameter of the second mounting hole 61 can also be constructed to be equal to the outer diameter of the rod component 4, so that the second connector 6 can be fixed to the rod component 4 by interference fit, which can also achieve the same effect.

[0049] In implementation, the number of outlets 62 can be one or more. When multiple outlets 62 are configured, each outlet 62 can be evenly distributed along the circumference of the second connector 6 to connect to different cylinders. When the second connector 6 is configured with only one outlet 62, a second connecting portion 43 can be provided on the side of the rod member 4, and the second connecting portion 43 adopts a radially arranged connecting hole; during assembly, the outlet 62 corresponds to the connecting hole. When the second connector 6 is configured with multiple outlets 62, multiple connecting holes can also be provided on the side of the rod member 4; during assembly, each outlet 62 corresponds to each connecting hole. Furthermore, in a more preferred embodiment, when the second connector 6 is configured with multiple outlets 62, the second connecting portion 43 can include an annular groove 44 constructed on the outer surface of the rod member 4, and the air supply channel 41 communicates with the annular groove 44, such as... Figures 5-7 As shown, at this time, only one second mounting hole 61 can be configured. The second mounting hole 61 is connected to the annular groove 44. After assembly, the outlet 62 corresponds to the annular groove 44, so that each outlet 62 is connected to the annular groove 44 respectively. Figure 6 and Figure 7As shown, during the rotation of the machine head 3, the outlet 62 is always connected to the air supply channel 41 through the annular groove 44, allowing the gas in the air supply channel 41 to be smoothly output through the annular groove 44 without being interfered with by the rotation of the rod component 4. In actual use, the outlet 62 is connected to the air pipe 32 on the machine head 3, and the air pipe 32 is connected to the pneumatic equipment such as the cylinder on the machine head 3. During actual operation, the rod component 4, the connecting seat 2, and the air pipe 32 on the machine head 3 rotate synchronously with the machine head 3, and the air pipe 32 on the machine head 3 will not entangle or cause other problems, allowing the connector to rotate freely. Compared with existing technologies, this design has a more optimized structure, and the spacing between the first connector 5 and the second connector 6 can be determined according to actual needs. For example, as shown in the figure, the first connector 5 can be arranged on the upper part of the connector 2 or above the connector 2. Similarly, the second connector 6 can be arranged on the lower part of the connector 2 or below the connector 2, as shown in the figure. This allows for a larger spacing between the first connector 5 and the second connector 6, which not only avoids mutual interference and influence, but also makes it easier to assemble and connect the air tube 32, etc., which is very convenient.

[0050] Example 2

[0051] The main difference between this embodiment 2 and the above embodiment 1 is that the sewing machine provided in this embodiment also includes a slip ring (or electric slip ring). The slip ring is set in the vertical channel 23 and located between the first connector 5 and the second connector 6. The slip ring can achieve stable power supply and signal transmission during the rotation of the machine head 3 relative to the support arm 1, and avoid wire tangling.

[0052] Specifically, the slip ring adopts a slip ring with a central channel 74, such as... Figure 8 As shown, the slip ring includes a rotating part 72 and a stationary part 71. The rotating part 72 is constructed with a cylinder 73, and a central channel 74 inside the cylinder 73 passes through the upper and lower ends of the rotating part 72, as shown. Figure 8 As shown, the stationary part 71 is typically constructed as a cylindrical structure 73. The stationary part 71 is fitted onto the cylindrical structure 73 of the rotating part 72. The rotating part 72 can rotate relative to the stationary part 71. At the same time, the rotating part 72 and the stationary part 71 are electrically connected through conductive materials (such as metal rings and brushes). When the rotating part 72 rotates relative to the stationary part 71, the conductive materials maintain sliding contact, so that the rotating part 72 and the stationary part 71 always maintain an electrical connection.

[0053] In practice, the stationary part 71 is fixedly connected to the support arm 1, for example, as shown in the figure. Figure 9 As shown, the stationary part 71 is connected to a connector 13, which is connected to the support arm 1. The lower end of the rotating part 72 is connected to the connecting seat 2 or the machine head 3, for example, as shown. Figure 9As shown, the rotating part 72 is connected to another connector 13, which is connected to the connector 2. The rod member 4 passes through the slip ring via the central channel 74, such that the first connector 5 is located above the stationary part 71, and the second connector 6 (second connecting part 43) is located below the rotating part 72, as shown. Figure 9 As shown, at this time, the rod component 4 can be fixed to the rotating part 72 of the slip ring (e.g., glued for fixation), or the connector 13, or the connecting seat 2, or the machine head 3. Correspondingly, the second connector 6 can also be connected to the rotating part 72, or the connecting seat 2, or the machine head 3. This not only strengthens the constraint and fixation of the second connector 6 and ensures the airtightness between the second connector 6 and the rod component 4, but also enables the rod component 4, the second connector 6 connected to the rod component 4, the rotating part 72, the connecting seat 2, and the machine head 3 to rotate synchronously relative to the stationary part 71 and the support arm 1. This prevents problems such as entanglement of the air pipe 32 connecting the second connector 6 and the cylinder during rotation.

[0054] It is understandable that at this time, the upper end of the cylinder 73 in the rotating part 72 can extend into the stationary part 71, or it can be flush with the upper end of the stationary part 71, or it can be slightly lower than the stationary part 71.

[0055] Example 3

[0056] The main difference between this embodiment 3 and embodiment 2 is that, in the sewing machine provided in this embodiment, a stationary part 71 extends from the upper end of the cylinder 73 in the rotating part 72, such as... Figure 10 As shown, the first connector 5 is sleeved on the outside of the cylinder 73. Specifically, the side of the cylinder 73 has a through hole 75; and, as shown... Figures 10-12 As shown, the first connecting portion 42 includes an annular groove 44 formed on the outer surface of the rod member 4, and the air supply channel 41 communicates with the annular groove 44. During assembly, the through hole 75 of the cylinder 73 corresponds to the annular groove 44, as shown. Figures 10-12 As shown, the through hole 75 is connected to the air supply channel 41; the rod component 4 is sealed to the cylinder 73. For example, the space between the rod component 4 and the cylinder 73 is filled with adhesive. The adhesive can fix the rod component 4 to the cylinder 73 and achieve a good sealing effect between the rod component 4 and the cylinder 73, preventing air leakage between the rod component 4 and the cylinder 73.

[0057] Correspondingly, the inner diameter of the first mounting hole 51 in the first connector 5 is larger than the outer diameter of the cylinder 73. The first connector 5 is sleeved on the outside of the cylinder 73. At this time, the first connector 5 can be fixed to the stationary part 71 of the slip ring, such as... Figures 10-12 As shown, the cylinder 73 can rotate relative to the first connector 5, and an circumferential channel 53 is formed between the first connector 5 and the cylinder 73. The through hole is connected to the circumferential channel 53, as shown. Figures 10-12As shown, inlet 52 is connected to circumferential channel 53, so that inlet 52 is always connected to first connecting part 42, thereby making inlet 52 always connected to gas supply channel 41.

[0058] In this embodiment, the sealing structures located on both sides of the first connector 5 are used to seal both sides of the circumferential channel 53, preventing air leakage between the first connector 5 and the cylinder 73. For example, when the sealing structure includes the sealing ring 55 as in Embodiment 1, the sealing ring 55 is disposed within the sealing ring groove 54, and the inner side of the sealing ring 55 abuts against the outer surface of the cylinder 73. Figure 11 As shown, the outer side of the sealing ring 55 abuts against the annular surface of the cylinder 73 on the sealing ring groove 54, thereby eliminating the gap between the first connector 5 and the cylinder 73 and achieving the purpose of sealing the ring towards the channel 53.

[0059] It is understandable that the sealing ring 55 has a certain degree of elasticity, and in implementation, rubber rings are preferred for the sealing ring 55.

[0060] Example 4

[0061] This embodiment provides a sewing machine, including the machine head 3 structure described in Embodiment 1, Embodiment 2, or Embodiment 3, and a sewing platform 8, as shown below. Figure 13 As shown, the support arm 1 is fixed to the sewing platform 8. In practice, the sewing platform 8 typically includes a platform 82 and a frame 81 for supporting the platform, such as... Figure 13 As shown, one end of the support arm 1 is fixed to the sewing platform 8. For example, it can usually be fixedly connected to the frame 81 of the sewing platform 8. The support arm 1 is used to support the machine head 3.

[0062] In a more complete embodiment, the sewing machine also includes a motor 11 for driving the sewing head 3 to rotate. The motor 11 is connected to the connecting seat 2 via a transmission mechanism 12 to drive the sewing head 3 to rotate. In practice, the motor 11 can be mounted on the support arm 1 or on the frame 81 of the sewing platform 8. In actual use, the motor 11 can drive the sewing head 3 to rotate at any angle required, such as 90 degrees, 180 degrees, 360 degrees, or greater than 360 degrees, so that the sewing head 3 can rotate arbitrarily as needed during the sewing process, thereby achieving perfect stitches.

[0063] In implementation, the transmission mechanism 12 adopts common transmission mechanisms such as existing belt transmission mechanism 12 or gear transmission mechanism 12. For example, in this embodiment, the transmission mechanism 12 adopts synchronous belt transmission mechanism 12, and the driven gear in the synchronous belt transmission mechanism 12 is arranged on the outside of the connecting seat 2 so that the motor 11 drives the connecting seat 2 to rotate.

[0064] In practice, it also includes a gas source device for providing pressurized gas, such as an air compressor. The gas source device is connected to the inlet 52 of the first connector 5 via an air pipe 32. At the same time, pneumatic devices such as cylinders on the machine head 3 are connected to the outlet 62 of the second connector 6 via an air pipe 32.

[0065] The above description is only a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model.

Claims

1. A machine head structure, comprising a machine head, a connecting seat, and a support arm for bearing loads, wherein the connecting seat has a vertical channel, the connecting seat is rotatably connected to the support arm, the machine head is connected to the connecting seat, and the vertical channel corresponds to the top of the machine head, characterized in that, It also includes an air supply assembly, which includes a vertically arranged rod component and a first connector. The rod component has an air supply channel along its length, and the side of the rod component has a first connecting part and a second connecting part spaced apart from each other along the length of the rod component. The first connecting part and the second connecting part are respectively connected to the air supply channel. The rod component is located in the vertical channel and connected to the machine head or connecting seat; The first connector has an inlet for connecting to a trachea. The first connector is sleeved on the rod component and fixed to the support arm. The rod component can rotate relative to the first connector, and during the rotation, the inlet and the first connecting part remain in communication.

2. The handpiece structure of claim 1, wherein The first connector has a first mounting hole, and the inlet is connected to the first mounting hole. The inner diameter of the first mounting hole is larger than the outer diameter of the rod component. The first connector is sleeved on the rod component through the first mounting hole. An annular channel is formed between the inner sidewall of the first mounting hole and the rod component. The first connecting part is connected to the annular channel, and the inlet is connected to the annular channel.

3. The handpiece structure of claim 2, wherein, The first connector is also provided with sealing structures at both ends, and the two sealing structures are used to seal both sides of the circumferential channel respectively; the sealing structure includes an annular sealing ring and a sealing ring groove constructed at the end of the first connector, the inner diameter of the sealing ring groove is larger than the inner diameter of the first mounting hole; the sealing ring is disposed in the sealing ring groove, the inner side of the sealing ring abuts against the outer surface of the rod component, and the outer side of the sealing ring abuts against the annular surface of the rod component on the sealing ring groove; And / or, the first connecting portion includes a connecting hole constructed on the rod member, the connecting hole being connected to an air supply channel and the connecting hole being connected to a first mounting hole; And / or, the first connecting portion includes an annular groove formed on the outer surface of the rod member, an air supply channel communicating with the annular groove, and the annular channel being formed between the bottom of the annular groove and the inner sidewall of the first mounting hole.

4. The handpiece structure of claim 1, wherein It also includes a collector ring disposed in the vertical channel. The collector ring has a central channel through which the rod component passes. The first connector is located above the collector ring, and the second connecting part is located below the collector ring.

5. The handpiece structure of claim 4, wherein, The collector ring includes a rotating part and a stationary part. The rotating part is constructed as a cylinder, and the central channel inside the cylinder passes through the upper and lower ends of the rotating part. The stationary part is fitted onto the cylinder of the rotating part, and the rotating part can rotate relative to the stationary part. The stationary part is connected to the support arm, and the rotating part is connected to the connecting seat or the machine head.

6. The handpiece structure of claim 5, wherein, The upper end of the cylinder extends into a stationary part, and the side of the cylinder is constructed with a through hole. The first connecting part includes an annular groove constructed on the outer surface of the rod component, and the air supply channel is connected to the annular groove. The rod component is sealed to the cylinder, and the through hole is connected to the annular groove. The first connector has a first mounting hole that extends through both ends. The inner diameter of the first mounting hole is larger than the outer diameter of the cylinder. The first connector is fitted onto the outside of the cylinder through the first mounting hole. A circumferential channel is formed between the inner wall of the first mounting hole and the cylinder. The through hole is connected to the circumferential channel, and the inlet is connected to the circumferential channel.

7. The handpiece structure of claim 6, wherein The first connector is also provided with sealing structures at both ends, and the two sealing structures are used to seal the two sides of the circumferential channel respectively; the sealing structure includes an annular sealing ring and a sealing ring groove constructed at the end of the first connector, the inner diameter of the sealing ring groove is larger than the inner diameter of the first mounting hole; the sealing ring is disposed in the sealing ring groove, the inner side of the sealing ring abuts against the outer surface of the cylinder, and the outer side of the sealing ring abuts against the annular surface of the cylinder corresponding to the sealing ring groove.

8. The nosepiece structure of any of claims 1-7, wherein, It also includes a second connector, which has an outlet, is sealed to the rod component, and the outlet is connected to the second communication portion.

9. The handpiece structure of claim 8, wherein, The second connector has a second mounting hole for adapting the rod component, which is connected to the outlet; the second connecting portion includes an annular groove formed on the outer surface of the rod component, and the air supply channel is connected to the annular groove. The second connector is sleeved on the rod component through the second mounting hole and covers the annular groove. And / or, the rod component is coaxial with the rotation center of the machine head; the first mounting hole is coaxial with the rotation center of the machine head; And / or, the top of the machine head is provided with a connecting port, and a vertical channel is connected to the connecting port.

10. A sewing machine comprising a sewing platform, characterized in that, It also includes the head structure according to any one of claims 1-9, wherein the support arm is fixed to the sewing platform; It also includes a motor, which is connected to the connecting seat via a transmission mechanism to drive the machine head to rotate.

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