Embroidery machine head device

Abstract

An embroidery machine head device comprises a first embroidery machine head and a second embroidery machine head, the first embroidery machine head is provided with a first guide shaft, the periphery of the first guide shaft is sleeved with a first presser foot driver, the second embroidery machine head is provided with a second guide shaft, and the periphery of the second guide shaft is sleeved with a second presser foot driver. The first presser foot driver and the second presser foot driver are driven by the inter-machine-head presser foot linkage device, the inter-machine-head presser foot linkage device comprises a first connecting rod assembly driven by a main shaft, the first connecting rod assembly is connected with a first connecting rod and a second connecting rod through presser foot connecting rods, the first connecting rod is connected with the first presser foot driver, and the second connecting rod is connected with the second presser foot driver. The second connecting rod is connected with the second presser foot driver. According to the utility model, the presser foot linkage device between the two machine heads is arranged between the two machine heads to drive the presser foot drivers in the respective machine heads, so that the synchronous driving performance between the two machine heads is realized, and the axial size of the machine heads is shortened.

Description

Technical Field

[0001] This utility model relates to the field of embroidery machine technology, and in particular to an embroidery machine head device. Background Technology

[0002] Currently, in the field of high-speed embroidery machines, the requirement for the number of machine heads is that, within a limited spindle length, the more machine heads the better. Each machine head inherently contains a needle bar, a needle bar driver, a presser foot, a presser foot driver, and the spindle itself, among other necessary structures. The drive linkage structure between the needle bar driver and the presser foot driver is also indispensable. All of these structural elements mean that the number of machine heads on the current embroidery machine spindle is already at its limit and cannot be increased. The inability to increase the number of machine heads means that the width of the machine head along the spindle axis cannot be reduced. Given the existing functionality, it is impossible to reduce the width of the machine head or increase its number. Solving this technical problem is a subject of research for those skilled in the art. Utility Model Content

[0003] This invention provides a machine head device that can further increase the number of machine heads along the main shaft axial direction under the condition of a limited main shaft length. Specifically, it drives the presser foot drivers in two machine heads through a presser foot linkage device between machine heads, thereby reducing the presser foot drive structure inside a single machine head and reducing the width of the machine head, thus achieving the advantage of increasing the number of machine heads arranged along the main shaft.

[0004] This application provides an embroidery machine head assembly, including a first embroidery machine head and a second embroidery machine head. The first embroidery machine head is equipped with a second guide shaft, and a second presser foot driver is sleeved on the outer periphery of the second guide shaft. The second embroidery machine head is equipped with a third guide shaft, and a third presser foot driver is sleeved on the outer periphery of the third guide shaft. The second and third presser foot drivers are driven by an inter-head presser foot linkage device between the first and second embroidery machine heads. The inter-head presser foot linkage device includes a first linkage assembly for main shaft drive. The first linkage assembly connects to a first link and a second link via presser foot links. The first link connects to the second presser foot driver, and the second link connects to the third presser foot driver. This embroidery machine head assembly utilizes an inter-head presser foot linkage device between the first and second embroidery machine heads to drive the presser foot drivers inside each of the two machine heads. This reduces the presser foot drive structure inside each individual machine head, narrows the machine head width, and thus increases the number of main shaft machine heads that can be arranged.

[0005] The first linkage assembly includes a third linkage connected to the main shaft. The third linkage also connects to one end of a fourth and a fifth linkage. The other end of the fifth linkage connects to a first positioning shaft. The other end of the fourth linkage connects to one end of a presser foot linkage. The other end of the presser foot linkage connects to both the first and second linkages via a first connecting shaft. The middle of the presser foot linkage connects to a mounting base on the side of the first embroidery machine head via a second positioning shaft. This first linkage assembly, through the third linkage connecting to the main shaft and the presser foot linkage, achieves synchronous driving performance where the first linkage connects to the second presser foot driver, and the second linkage connects to the third presser foot driver, reducing the need for internal presser foot drive structures within a single machine head.

[0006] The first embroidery machine head is a double-needle head, which includes two embroidery needle bars. One embroidery needle bar is driven up and down by a second needle bar driver on the outer periphery of a second guide shaft, and the other embroidery needle bar is driven up and down by a first needle bar driver on the outer periphery of a first guide shaft. The second needle bar driver and the first needle bar driver are driven to move up and down synchronously through a second linkage assembly. The second embroidery machine head is a double-needle head, which includes two embroidery needle bars. One embroidery needle bar is driven up and down by a third needle bar driver on the outer periphery of a third guide shaft, and the other embroidery needle bar is driven up and down by a fourth needle bar driver on the outer periphery of a fourth guide shaft. The third needle bar driver and the fourth needle bar driver are driven to move up and down synchronously through a third linkage assembly. The second linkage assembly includes a first pin connecting to the head of the first embroidery machine, a first connecting shaft tube sleeved around the outer periphery of the first pin at one end of the first three-eye connecting rod, a second connecting shaft tube sleeved in the middle of the first three-eye connecting rod, the second connecting shaft connecting to the first drive connecting rod, the first drive connecting rod connecting to the main shaft, a third connecting shaft tube at the other end of the first three-eye connecting rod connecting to the sixth and seventh connecting rods respectively at both ends of the third connecting shaft, the sixth connecting rod connecting to the first needle bar driver via a fourth connecting shaft, and the seventh connecting rod connecting to the second needle bar driver via a fifth connecting shaft. The third linkage assembly includes a first positioning shaft connected to the second embroidery machine head. A fourth connecting shaft tube is sleeved around the outer periphery of the first positioning shaft at one end of the second three-eye connecting rod. A fifth connecting shaft tube in the middle of the second three-eye connecting rod is sleeved around a sixth connecting shaft. The sixth connecting shaft connects to a second drive connecting rod, which in turn connects to the main shaft. A seventh connecting shaft tube at the other end of the first three-eye connecting rod connects to an eighth and ninth connecting rod at both ends via the seventh connecting shaft. The eighth connecting rod connects to a third needle bar driver via the seventh connecting shaft, and the ninth connecting rod connects to a fourth needle bar driver via the eighth connecting shaft. The dual-needle bar machine head is a high-speed embroidery machine head with only two embroidery needle bars, i.e., two embroidery needles. The second needle bar driver and the first needle bar driver are driven synchronously up and down by the second linkage assembly, achieving efficient drive performance while ensuring high-speed movement.

[0007] The first guide shaft is simultaneously fitted with a first presser foot driver and a first needle bar driver; the second guide shaft is simultaneously fitted with a second presser foot driver and a second needle bar driver; the third guide shaft is simultaneously fitted with a third presser foot driver and a third needle bar driver; and the fourth guide shaft is simultaneously fitted with a fourth presser foot driver and a fourth needle bar driver. This structure, in which the presser foot driver and needle bar driver are simultaneously fitted on the outer periphery of the guide shaft, further reduces the number of components inside the machine head.

[0008] The first needle bar driver and the second needle bar driver are driven to move up and down synchronously through the second linkage assembly inside the first embroidery machine head. The third needle bar driver and the fourth needle bar driver are driven to move up and down synchronously through the third linkage assembly inside the second embroidery machine head. The second presser foot driver and the third presser foot driver are driven to move up and down synchronously through the first linkage assembly. The first linkage assembly, the second linkage assembly, and the third linkage assembly are all driven synchronously by the main shaft to improve the linkage performance.

[0009] The first and second embroidery machine heads are arranged in two or more configurations along the main shaft. A presser foot linkage device is installed between adjacent machine heads to drive a presser foot driver inside each machine head. Neither the first nor the second embroidery machine head has a presser foot driver linkage structure installed inside, thus reducing the number of presser foot drive structures inside a single machine head, narrowing the machine head width, and thereby increasing the number of machine heads arranged along the main shaft.

[0010] As can be seen from the above, this utility model uses a joint device between the first and second embroidery machine heads to drive the presser foot drivers in their respective machine heads, thereby achieving synchronous driving between the machine heads and avoiding the need for a separate presser foot driver drive structure inside the embroidery machine head. This effectively improves the utilization rate of the axial installation space of the embroidery machine spindle. Attached Figure Description

[0011] The present invention will be further described below with reference to the accompanying drawings:

[0012] Figure 1 This is a three-dimensional structural diagram of an embroidery machine head device according to the present invention;

[0013] Figure 2 This is a three-dimensional structural diagram of the internal structure of an embroidery machine head device according to the present invention;

[0014] Figure 3 This is a schematic diagram of the installation structure of the first embroidery machine head in this utility model;

[0015] Figure 4 This is a schematic diagram of the mounting structure of the second embroidery machine head in this utility model;

[0016] Figure 5 This is a schematic diagram of the inter-head presser foot linkage device in this utility model;

[0017] Figure 6 This is a schematic diagram of the internal installation structure of the first embroidery machine head in this utility model;

[0018] Figure 7 This is a schematic diagram of the second connecting rod assembly in this utility model;

[0019] Figure 8 This is a schematic diagram of the third link assembly in this utility model. Detailed Implementation

[0020] The following is in conjunction with the appendix Figure 1-8 The specific implementation method further illustrates the technical solution of this patent.

[0021] The technical solutions of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. The components of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely represents selected embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application. It should be noted that similar reference numerals and letters in the following drawings indicate similar items; therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings. Furthermore, in the description of this application, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0022] The names and numbers of the components of this utility model are as follows: 1. Second embroidery machine head; 2. First guide shaft; 3. Second guide shaft; 4. Presser foot connecting rod; 5. Third guide shaft; 6. Fourth guide shaft; 7. First needle bar driver; 8. First presser foot driver; 10. Second needle bar driver; 11. Second presser foot driver; 12. Third presser foot driver; 15. Fourth presser foot driver; 16. Fifth connecting rod; 18. Main shaft; 19. Mounting base; 20. First positioning shaft; 21. Fourth connecting rod; 23. Second positioning shaft; 24. Second connecting rod; 25. First connecting rod; 26. First pin; 30. Second connecting shaft; 32. Third connecting shaft; 33. Fifth connecting shaft; 34. Seventh connecting rod; 35. Fourth connecting shaft; 36. Sixth connecting rod; 37. First drive connecting rod; 43. Second drive connecting rod; 44. Third needle bar driver; 51. Fourth needle bar driver; 52. First connecting shaft; 66. First three-eye connecting rod; 71. Second three-eye connecting rod; 80. Eighth connecting rod; 82. Ninth connecting rod; 85. Eighth connecting shaft; 86. Seventh connecting shaft; 87. Sixth connecting shaft; 88. Third connecting rod; 99.

[0023] In existing technologies, the embroidery machine head needs to integrate a needle bar driver, a presser foot driver, and a matching connecting rod structure, making it difficult to compress the width of a single head along the main shaft. Traditional designs independently set up a presser foot drive structure inside each head. When multiple heads are arranged along the main shaft, the redundant drive components between adjacent heads occupy a large amount of axial space, limiting the potential for increasing the number of heads per unit length of the main shaft. For example, in a dual-head layout, the independent presser foot drive systems of the two heads create dual structural redundancy, resulting in low axial space utilization.

[0024] To address the aforementioned issues, the researchers discovered that the traditional independent drive mode for the die head suffers from structural repetition. Analysis of the presser foot's movement trajectory revealed a need for synchronized movement between adjacent presser feet, providing a possibility for linked drive systems. Further research proposed mechanically linking the presser foot drive systems of adjacent die heads, using a single drive source to control multiple presser feet, thereby eliminating redundant drive components. This approach overcomes the limitations of the traditional independent drive mode and opens up new avenues for optimizing the axial layout of the die head.

[0025] Therefore, this application proposes an embroidery machine head device including a first embroidery machine head 7 and a second embroidery machine head 1. The first embroidery machine head 7 is equipped with a second guide shaft 3, and a second presser foot driver 12 is sleeved on the outer periphery of the second guide shaft 3. The second embroidery machine head 1 is equipped with a third guide shaft 5, and a third presser foot driver 15 is sleeved on the outer periphery of the third guide shaft 5. The second presser foot driver 12 and the third presser foot driver 15 are driven by a presser foot linkage device between machine heads. The presser foot linkage device between machine heads includes a first linkage assembly driven by a main shaft 19. The first linkage assembly is connected to a first linkage 26 and a second linkage 25 respectively through a presser foot linkage 4. The first linkage 26 is connected to the second presser foot driver 12, and the second linkage 25 is connected to the third presser foot driver 15.

[0026] The inter-head presser foot linkage device refers to a mechanical transmission system spanning two presser heads. Specifically, it utilizes rigid rods and rotating shafts to transmit power, synchronously transmitting the motion of a single drive source to the presser foot actuators of different presser heads. The main shaft, as the core of power output, can be positioned on the outside or in the middle of the presser head, converting rotary motion into linear reciprocating motion via a crank-connecting rod mechanism. The presser foot linkage, as a power distribution component, can be a rigid rod with multiple connection points, used to synchronously distribute the power output from the main shaft to the presser foot drive linkages of different presser heads. The first and second linkages form a branch transmission structure connecting the presser foot actuators, ensuring synchronous lifting and lowering motion of the two presser foot actuators.

[0027] Specifically, when the spindle rotates, it drives the first linkage assembly to generate reciprocating motion. This motion is synchronously transmitted to the first and second linkages via the pressure foot linkage. The first linkage drives the second pressure foot actuator to move up and down along the second guide shaft, and the second linkage drives the third pressure foot actuator to move synchronously along the third guide shaft. Since the two pressure foot actuators share the same drive source, there is no need for separate pressure foot drive linkage assemblies inside the first and second machine heads, thereby reducing the axial space occupied inside the two machine heads. This linkage structure keeps the pressure foot movements of adjacent machine heads synchronized, while avoiding the duplication of drive components in traditional designs.

[0028] Compared to existing technologies, traditional solutions involve setting up independent presser foot drive systems within each machine head, resulting in axial overlap of drive components between adjacent machine heads and limiting the density of machine head arrangement. This solution, through a cross-machine head linkage design, integrates the presser foot drive systems of two machine heads into a single transmission chain, eliminating redundancy in the machine head drive structure. This structural innovation allows for more machine heads to be arranged within a unit spindle length while maintaining the normal functioning of the presser feet in each machine head.

[0029] Through the above technical solution, this application effectively solves the problem of low axial space utilization in multi-head embroidery machines. By replacing the traditional independent drive mode with a presser foot linkage device structure between the heads, the axial space originally used for independent drive components is saved between adjacent heads, allowing for an increase in the number of heads installed with the same spindle length. This solution achieves a breakthrough improvement in the density of embroidery machine head layout while ensuring the integrity of the presser foot function.

[0030] This application further proposes a first linkage assembly including a third linkage 99, which is connected to the main shaft 19. The third linkage 99 is also connected to one end of the fourth linkage 23 and the fifth linkage 18. The other end of the fifth linkage 18 is connected to the first positioning shaft 21. The other end of the fourth linkage 23 is connected to one end of the presser foot linkage 4. The other end of the presser foot linkage 4 is connected to the first linkage 26 and the second linkage 25 respectively through the first connecting shaft 66. The middle of the presser foot linkage 4 is connected to the mounting base 20 on the side of the first embroidery machine head 7 through the second positioning shaft 24.

[0031] The third link is a rigid rod connecting the main shaft and transmitting power, used to convert the rotational motion of the main shaft into linear reciprocating motion. The fourth and fifth links are branch links hinged to the third link, specifically using a forked hinge structure, used to divert power to the pressure foot link. The pressure foot link is a transmission rod bridging the fourth link and the third link 99 of the drive component, specifically using a straight rod with hinge holes at both ends, used to synchronously transmit power to the pressure foot actuators of different machine heads. The first connecting shaft 66 is a rotating shaft passing through the end of the pressure foot link and hinged to the first and second links, specifically using a stepped shaft with a bearing structure, used to achieve a pivotal connection for multi-directional power transmission. The second positioning shaft is a positioning component fixed to the mounting base and passing through the middle section of the pressure foot link, specifically using a bolted bushing structure, used to limit the lateral displacement of the pressure foot link and maintain the accuracy of the transmission trajectory.

[0032] Specifically, when the spindle rotates, it drives the third link to swing. The third link, through the fourth link, pushes the presser foot link to rotate around the second positioning shaft. Simultaneously, the fifth link transmits some power to the first positioning shaft to balance the force. The first connecting shaft 66 synchronously drives the first and second links, thereby controlling the linkage between the second and third presser foot drivers. The design of the second positioning shaft being fixed to the mounting base eliminates the need for additional support structures for the presser foot link, allowing stable transmission to be achieved directly using the existing mounting points on the side of the machine head.

[0033] Compared to existing technologies, traditional solutions require independent drive linkages and positioning structures for each pressure foot actuator, leading to increased axial space occupancy in the machine head. This solution uses a single pressure foot linkage to connect two machine heads and integrates positioning functionality through a mounting base, thus reducing the space requirements of the drive structure.

[0034] Through the above technical solution, this application achieves synchronous control of the two presser foot drivers, while eliminating the need for independent positioning shafts and support structures, thus reducing the spacing between the presser heads along the spindle direction. Therefore, with the same spindle length, the number of presser heads can be increased, and transmission stability is ensured through the rigid connection between the second positioning shaft and the mounting base.

[0035] This application further proposes an embroidery machine head device. The first embroidery machine head 7 is a double needle bar head, which includes two embroidery needle bars. One embroidery needle bar is driven up and down by a second needle bar driver 11 on the outer periphery of a second guide shaft 3, and the other embroidery needle bar is driven up and down by a first needle bar driver 8 on the outer periphery of a first guide shaft 2. The second needle bar driver 11 and the first needle bar driver 8 are driven to move up and down synchronously through a second linkage assembly. The second embroidery machine head 1 is also a double needle bar head, which includes two embroidery needle bars. One embroidery needle bar is driven up and down by a third needle bar driver 51 on the outer periphery of a third guide shaft 5, and the other embroidery needle bar is driven up and down by a fourth needle bar driver 52 on the outer periphery of a fourth guide shaft 6. The third needle bar driver 51 and the fourth needle bar driver 52 are driven to move up and down synchronously through a third linkage assembly.

[0036] The second linkage assembly includes a first pin 30 connected to the first embroidery machine head 7, a first connecting shaft tube 71 sleeved on the outer periphery of the first pin 30 at one end of the first three-eye connecting rod, a second connecting shaft tube 31 sleeved on the middle of the first three-eye connecting rod, a second connecting shaft 32 connected to the second connecting shaft 32, a first driving connecting rod 43 connected to the main shaft 19, a third connecting shaft tube 9 at the other end of the first three-eye connecting rod connected to a sixth connecting rod 37 and a seventh connecting rod 35 at both ends of the third connecting shaft 33, a sixth connecting rod 37 connected to a first needle bar driver 8 via a fourth connecting shaft 36, and a seventh connecting rod 35 connected to a second needle bar driver 11 via a fifth connecting shaft 34.

[0037] The third linkage assembly includes a first positioning shaft 21 connected to the second embroidery machine head 1. The outer periphery of the first positioning shaft 21 is sleeved with a fourth connecting shaft tube 80 at one end of the second three-eye connecting rod. The fifth connecting shaft tube 81 in the middle of the second three-eye connecting rod is sleeved with a sixth connecting shaft 88. The sixth connecting shaft 88 is connected to a second driving connecting rod 44. The second driving connecting rod 44 is connected to the main shaft 19. The seventh connecting shaft tube 84 at the other end of the first three-eye connecting rod is connected to an eighth connecting rod 82 and a ninth connecting rod 85 at both ends through a seventh connecting shaft 87. The eighth connecting rod 82 is connected to a third needle bar driver 51 through the seventh connecting shaft 87. The ninth connecting rod 85 is connected to a fourth needle bar driver 52 through an eighth connecting shaft 86.

[0038] The dual-needle bar embroidery head refers to a structure that integrates two independent embroidery needle bars within a single head. This can be achieved using coaxially arranged guide shafts and drivers, with a synchronous drive mechanism enabling the two needle bars to work synchronously. The second linkage assembly is a mechanical linkage mechanism used to transmit power to the main shaft and control the synchronous movement of the internal drivers of the dual-needle bar embroidery head. This can be achieved using a three-eye linkage and multi-axis connection structure. The third linkage assembly is a drive mechanism symmetrically arranged with the second linkage assembly. It can adopt the same structural form as the second linkage assembly, enabling the synchronous movement of the two needle bars of the second embroidery machine head.

[0039] Compared to existing technologies, traditional dual-needle bar sewing machines typically use two independent linkages to drive two separate needle bar drivers, resulting in a large lateral space requirement. This solution integrates the motion of the two drive mechanisms into a single linkage system through a three-linkage transmission design, significantly reducing the lateral layout space requirement while ensuring synchronization accuracy.

[0040] Through the above technical solution, this application effectively reduces the lateral dimension of the internal drive structure of the double needle bar head, enabling multiple embroidery machine heads to be arranged at a higher density along the main shaft axis, thereby increasing the number of machine heads under the condition of limiting the main shaft length.

[0041] This application further proposes that the first guide shaft 2 is simultaneously fitted with the first presser foot driver 10 and the first needle bar driver 8, the second guide shaft 3 is simultaneously fitted with the second presser foot driver 12 and the second needle bar driver 11, the third guide shaft 5 is simultaneously fitted with the third presser foot driver 15 and the third needle bar driver 51, and the fourth guide shaft 6 is simultaneously fitted with the fourth presser foot driver 16 and the fourth needle bar driver 52.

[0042] The first needle bar driver 8 and the second needle bar driver 11 are driven to move up and down synchronously through the second linkage assembly inside the first embroidery machine head 7. The third needle bar driver 51 and the fourth needle bar driver 52 are driven to move up and down synchronously through the third linkage assembly inside the second embroidery machine head 1. The second presser foot driver 12 and the third presser foot driver 15 are driven to move up and down synchronously through the first linkage assembly. The first linkage assembly, the second linkage assembly, and the third linkage assembly are all driven synchronously through the main shaft 19.

[0043] In this design, the presser foot driver and needle bar driver are coaxially nested on the outer circumference of the guide shaft. Synchronous movement can be achieved using keyway fitting or bearing connection. The guide shaft serves as a shared support and transmission carrier, bearing the vertical reciprocating motion of both the presser foot driver and needle bar driver. By integrating the presser foot driver and needle bar driver onto the same guide shaft, the number of independent drive structures within the machine head can be reduced, thereby compressing the machine head width.

[0044] Specifically, the first guide shaft connects to both the first presser foot driver and the first needle bar driver via its outer peripheral surface. Both drive the presser foot and needle bar synchronously when the guide shaft moves vertically. The second, third, and fourth guide shafts adopt the same structure, allowing each machine head to complete the driving task of dual needle bars and dual presser feet with only two guide shafts. Thus, the presser foot drive shaft and needle bar drive shaft, which originally needed to be separately located inside the machine head, are combined into a single guide shaft, reducing the space occupied by the mechanical structure.

[0045] Compared to existing technologies, traditional embroidery machine heads require separate guide shafts and drive assemblies for the presser foot driver and needle bar driver, resulting in a complex internal structure and large axial dimensions. This solution achieves synchronous control of the two drivers by sharing a guide shaft, significantly reducing the number of internal components and layout space requirements of the machine head while ensuring functional integrity.

[0046] Through the above technical solution, this application effectively solves the problem of the inability to reduce the width of the embroidery machine head. The coaxial integrated design of the presser foot driver and the needle bar driver increases the axial arrangement density of the drive structure inside a single head, allowing more heads to be accommodated per unit length of the main shaft. This provides a structural basis for increasing the number of heads with a limited main shaft length, breaking through the bottleneck of the current limit on the number of heads in existing technologies.

[0047] Specifically, the rotational motion of the main shaft is transmitted to the presser foot driver and the needle bar driver via the first, second, and third linkage assemblies, respectively. The second linkage assembly is connected to the shaft tube of the first three-eye connecting rod via a first pin, converting the rotation of the main shaft into linear reciprocating motion of the first and second needle bar drivers, enabling the two needle bars of the dual-needle bar machine head to move up and down synchronously. The third linkage assembly is connected to the shaft tube of the second three-eye connecting rod via a first positioning shaft, converting the rotation of the main shaft into linear reciprocating motion of the third and fourth needle bar drivers, achieving synchronous operation of the other dual-needle bar machine head. The first linkage assembly connects the second and third presser foot drivers via the presser foot connecting rod, enabling both to move synchronously with the drive of the main shaft. All three linkage assemblies are driven by the same main shaft, eliminating the need for independent drive sources or additional linkage mechanisms during transmission, thereby reducing the space occupied by the internal structure of the machine head.

[0048] Compared with existing technologies, which require separate transmission structures for presser foot drivers and needle bar drivers for each machine head, resulting in the width of the machine head being limited by the complex internal linkage layout, this solution uses a spindle to synchronously drive the presser foot linkage device across the machine heads and the dual needle bar transmission assembly inside the machine head. This allows the movement of multiple drivers to be controlled by the same spindle, eliminating the need to repeatedly set up drive structures in each machine head, thus significantly simplifying the internal space layout of the machine head.

[0049] Through the above technical solution, this application realizes the synchronous driving of the presser foot driver between multiple machine heads and the dual needle bar driver within the same machine head, reducing the number of independent transmission components inside each machine head, thereby compressing the width of the machine head along the spindle direction, so that more machine heads can be installed with the same spindle length, solving the problem of the limited number of machine heads caused by the complexity of the structure in the prior art.

[0050] This application further proposes that the first embroidery machine head 7 and the second embroidery machine head 1 are two or more arranged along the main shaft 19, and an inter-head presser foot linkage device is installed between adjacent embroidery machine heads to drive a presser foot driver inside the two embroidery machine heads. Neither the first embroidery machine head 7 nor the second embroidery machine head 1 has a linkage drive structure with a presser foot driver installed inside.

[0051] The arrangement along the main shaft refers to multiple machine heads being arranged sequentially along the main shaft's axial direction. For example, the main shaft can extend laterally, and the machine heads are fixed to its surface at certain intervals. This arrangement reduces the axial space occupied by a single machine head by sharing a linkage device, thereby increasing the number of machine heads within a limited main shaft length. The inter-machine head presser foot linkage device refers to an independent transmission mechanism installed between adjacent machine heads, such as a structure including a linkage assembly and a connecting shaft, which can transmit driving force across machine heads. This device replaces the traditional independently installed presser foot driver linkage structure inside the machine head, reducing the number of internal components and thus reducing its width. The linkage drive structure without a presser foot driver means that the dedicated transmission linkage for the presser foot driver is eliminated inside the machine head; for example, the power transmission function of the presser foot driver is transferred to an external linkage device. This design simplifies the internal layout of the machine head, avoids redundancy in the transmission structure, and provides a basis for reducing the size of the machine head.

[0052] Compared to existing technologies, traditional embroidery machines require an independent presser foot drive linkage structure inside each head, which limits the width of individual heads and restricts the number of heads that can be produced due to the spindle length limitation. This solution replaces the internal transmission structure with an external linkage device, significantly reducing the axial dimension of individual heads while maintaining the presser foot drive function. This allows for a greater density of heads within the same spindle length, overcoming existing technological bottlenecks.

[0053] Through the above technical solution, this application effectively solves the problem that the number of embroidery machine heads is limited by the length of the main shaft. By eliminating the linkage structure of the internal presser foot driver in the machine head and adopting an external linkage device, the width of a single machine head is reduced by about 20%-30%, significantly improving the working efficiency and pattern complexity load-bearing capacity of the embroidery machine.

[0054] Through the above technical solution, this application significantly reduces the axial installation size of a single embroidery head while maintaining the synchronous drive function of the presser foot. This allows for the arrangement of more embroidery machine heads with the same spindle length, breaking through the physical limitations of traditional structures on the number of heads. Simultaneously, the simplified internal structure of the head reduces overall mechanical complexity, which is beneficial for improving equipment reliability and reducing manufacturing costs.

[0055] The above description is merely an embodiment of this application and is not intended to limit the scope of protection of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of this application.

Claims

1. An embroidery machine head assembly, comprising a first embroidery machine head (7) and a second embroidery machine head (1), wherein the first embroidery machine head (7) is equipped with a second guide shaft (3), and a second presser foot driver (12) is sleeved on the outer periphery of the second guide shaft (3); and the second embroidery machine head (1) is equipped with a third guide shaft (5), and a third presser foot driver (15) is sleeved on the outer periphery of the third guide shaft (5), characterized in that: The second presser foot driver (12) and the third presser foot driver (15) are driven by the presser foot linkage device between the first embroidery machine head (7) and the second embroidery machine head (1). The presser foot linkage device between the machine heads includes a first linkage assembly driven by the main shaft (19). The first linkage assembly is connected to the first linkage (26) and the second linkage (25) respectively through the presser foot linkage (4). The first linkage (26) is connected to the second presser foot driver (12), and the second linkage (25) is connected to the third presser foot driver (15).

2. The embroidery machine head device according to claim 1, characterized in that: The first link assembly includes a third link (99), which is connected to the main shaft (19). The third link (99) is also connected to one end of the fourth link (23) and the fifth link (18). The other end of the fifth link (18) is connected to the first positioning shaft (21). The other end of the fourth link (23) is connected to one end of the presser foot link (4). The other end of the presser foot link (4) is connected to the first link (26) and the second link (25) respectively through the first connecting shaft (66). The middle of the presser foot link (4) is connected to the mounting seat (20) on the side of the first embroidery machine head (7) through the second positioning shaft (24).

3. The embroidery machine head device according to claim 1, characterized in that: The first embroidery machine head (7) is a double needle bar head, which includes two embroidery needle bars. One of the embroidery needle bars is driven up and down by a second needle bar driver (11) on the outer periphery of the second guide shaft (3), and the other embroidery needle bar is driven up and down by a first needle bar driver (8) on the outer periphery of the first guide shaft (2). The second needle bar driver (11) and the first needle bar driver (8) are driven to move up and down synchronously through a second linkage assembly. The second embroidery machine head (1) is a double needle bar head, which includes two embroidery needle bars. One of the embroidery needle bars is driven up and down by a third needle bar driver (51) on the outer periphery of the third guide shaft (5), and the other embroidery needle bar is driven up and down by a fourth needle bar driver (52) on the outer periphery of the fourth guide shaft (6). The third needle bar driver (51) and the fourth needle bar driver (52) are driven to move up and down synchronously through a third linkage assembly.

4. The embroidery machine head device according to claim 3, characterized in that: The second linkage assembly includes a first pin (30) connecting to the first embroidery machine head (7), a first connecting shaft tube (71) sleeved on the outer periphery of the first pin (30) at one end of the first three-eye connecting rod, a second connecting shaft tube (31) sleeved in the middle of the first three-eye connecting rod, a second connecting shaft (32) sleeved on the second connecting shaft (32) connecting to the first driving connecting rod (43), the first driving connecting rod (43) connecting to the main shaft (19), the third connecting shaft tube (9) at the other end of the first three-eye connecting rod connecting to the sixth connecting rod (37) and the seventh connecting rod (35) respectively through the two ends of the third connecting shaft (33), the sixth connecting rod (37) connecting to the first needle bar driver (8) through the fourth connecting shaft (36), and the seventh connecting rod (35) connecting to the second needle bar driver (11) through the fifth connecting shaft (34).

5. The embroidery machine head device according to claim 3, characterized in that: The third link assembly includes a first positioning shaft (21) connected to the second embroidery machine head (1), a fourth connecting shaft tube (80) sleeved on the outer periphery of the first positioning shaft (21) at one end of the second three-eye link, a fifth connecting shaft tube (81) in the middle of the second three-eye link sleeved on the sixth connecting shaft (88), the sixth connecting shaft (88) connected to the second drive link (44), the second drive link (44) connected to the main shaft (19), the seventh connecting shaft tube (84) at the other end of the first three-eye link is connected to the eighth link (82) and the ninth link (85) at both ends of the seventh connecting shaft (87), the eighth link (82) is connected to the third needle bar driver (51) through the seventh connecting shaft (87), and the ninth link (85) is connected to the fourth needle bar driver (52) through the eighth connecting shaft (86).

6. The embroidery machine head device according to claim 3, characterized in that: The first guide shaft (2) is simultaneously fitted with the first presser foot driver (10) and the first needle bar driver (8) on its outer periphery. The second guide shaft (3) is simultaneously fitted with the second presser foot driver (12) and the second needle bar driver (11) on its outer periphery. The third guide shaft (5) is simultaneously fitted with the third presser foot driver (15) and the third needle bar driver (51) on its outer periphery. The fourth guide shaft (6) is simultaneously fitted with the fourth presser foot driver (16) and the fourth needle bar driver (52) on its outer periphery.

7. The embroidery machine head device according to claim 6, characterized in that: The first needle bar driver (8) and the second needle bar driver (11) are driven to move up and down synchronously through the second linkage assembly inside the first embroidery machine head (7). The third needle bar driver (51) and the fourth needle bar driver (52) are driven to move up and down synchronously through the third linkage assembly inside the second embroidery machine head (1). The second presser foot driver (12) and the third presser foot driver (15) are driven to move up and down synchronously through the first linkage assembly. The first linkage assembly, the second linkage assembly, and the third linkage assembly are all driven synchronously through the main shaft (19).

8. The embroidery machine head device according to claim 1, characterized in that: The first embroidery machine head (7) and the second embroidery machine head (1) are two or more arranged along the main shaft (19). A presser foot linkage device between two adjacent embroidery machine heads is installed to drive a presser foot driver inside the two embroidery machine heads.

9. The embroidery machine head device according to claim 1, characterized in that: Neither the first embroidery machine head (7) nor the second embroidery machine head (1) has a connecting rod drive structure for the presser foot driver installed inside.

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