Embroidery machine head device with presser foot linkage between machine heads

Abstract

An embroidery machine head device with presser feet in linkage between machine heads 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. The inter-machine-head presser foot linkage device is installed between the two machine heads to drive the presser foot drivers in the machine heads, the synchronous driving performance between the two machine heads is achieved, and the axial size of the machine heads is shortened.

Description

Technical Field

[0001] The present invention relates to the technical field of embroidery machines, and particularly to an embroidery machine head device with inter-head presser foot linkage. Background Art

[0002] Currently, in the field of high-speed embroidery machines, the more embroidery machine heads there are on the premise of limiting the main shaft length, the better. The interior of an embroidery machine head necessarily includes a needle bar, a needle bar driver for driving the needle bar, a presser foot, a presser foot driver, and a main shaft and other necessary structures. The drive link structures of the needle bar driver and the presser foot driver are also essential. All of the above structures have led to the current limit in the number of heads on the main shaft of the embroidery machine, and it is impossible to increase. The inability to increase the number of heads means that the width dimension of the heads along the axial direction of the main shaft cannot be reduced. On the premise of having functions, it is already impossible to reduce the width dimension of the heads, nor can the number of heads be increased. How to solve the above technical problems is the object of research by those skilled in the art. Summary of the Invention

[0003] The present invention provides an embroidery machine head device with inter-head presser foot linkage that can further increase the number of embroidery machine heads along the axial direction of the main shaft under the condition of a limited main shaft length. Specifically, the presser foot drivers in two heads are driven by an inter-head presser foot linkage device, reducing the presser foot drive structure inside a single head and narrowing the width of the head, thereby achieving the advantage of increasing the number of heads arranged on the main shaft.

[0004] The present application provides an embroidery machine head device with inter-head presser foot linkage, 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 presser foot driver and the third presser foot driver are driven by an inter-head presser foot linkage device. The inter-head presser foot linkage device includes a first link assembly driven by the main shaft. The first link assembly is respectively connected to a first link and a second link through a presser foot link. The first link is connected to the second presser foot driver, and the second link is connected to the third presser foot driver. This kind of embroidery machine head device with inter-head presser foot linkage adopts an inter-head presser foot linkage device between the first embroidery machine head and the second embroidery machine head to drive the respective presser foot drivers inside the two embroidery machine heads, thereby reducing the presser foot drive structure inside a single head and narrowing the width of the head, and then achieving the technical performance of increasing the number of heads arranged on the main shaft.

[0005] The described first link assembly includes a third link. The third link is connected to the main shaft and simultaneously connects one end of a fourth link and a fifth link. The other end of the fifth link is connected to a first positioning shaft. The other end of the fourth link is connected to one end of a presser foot link. The other end of the presser foot link is respectively connected to a first link and a second link through a first connecting shaft. The middle of the presser foot link is connected to a mounting seat on the side of the first embroidery machine head through a second positioning shaft. This first link assembly uses the third link connected to the main shaft and cooperates with the presser foot link to achieve the synchronous driving performance of connecting the first link to the second presser foot driver and the second link to the third presser foot driver, reducing the presser foot driving structure inside a single head.

[0006] The described first embroidery machine head is a double-needle bar head. The double-needle bar head 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 link assembly; the second embroidery machine head is a double-needle bar head. The double-needle bar head 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 link assembly. The described second link assembly includes a first pin shaft connected to the first embroidery machine head. A first connecting shaft tube at one end of a first three-eye link is sleeved on the outer periphery of the first pin shaft. A second connecting shaft tube in the middle of the first three-eye link is sleeved with a second connecting shaft. The second connecting shaft is connected to a first driving link. The first driving link is connected to the main shaft. A third connecting shaft tube at the other end of the first three-eye link is respectively connected to a sixth link and a seventh link through a third connecting shaft. The sixth link is connected to the first needle bar driver through a fourth connecting shaft, and the seventh link is connected to the second needle bar driver through a fifth connecting shaft. The described third link assembly includes a first positioning shaft connected to the second embroidery machine head. A fourth connecting shaft tube at one end of a second three-eye link is sleeved on the outer periphery of the first positioning shaft. A fifth connecting shaft tube in the middle of the second three-eye link is sleeved with a sixth connecting shaft. The sixth connecting shaft is connected to a second driving link. The second driving link is connected to the main shaft. A seventh connecting shaft tube at the other end of the first three-eye link is respectively connected to an eighth link and a ninth link through a seventh connecting shaft. The eighth link is connected to the third needle bar driver through a seventh connecting shaft, and the ninth link is connected to the fourth needle bar driver through an eighth connecting shaft. The double-needle bar head is a high-speed embroidery head with only two embroidery needle bars, that is, two embroidery needles. The second needle bar driver and the first needle bar driver are driven to move up and down synchronously through the second link assembly to achieve efficient driving performance on the basis of ensuring high-speed movement.

[0007] The outer circumference of the first guide shaft is sleeved with a first presser foot driver and a first needle bar driver at the same time. The outer circumference of the second guide shaft is sleeved with a second presser foot driver and a second needle bar driver at the same time. The outer circumference of the third guide shaft is sleeved with a third presser foot driver and a third needle bar driver at the same time. The outer circumference of the fourth guide shaft is sleeved with a fourth presser foot driver and a fourth needle bar driver at the same time. This structure of sleeving the presser foot driver and the needle bar driver on the outer circumference of the guide shaft further reduces the 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 by a second connecting rod 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 by a third connecting rod 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 by a first connecting rod assembly. The first connecting rod assembly, the second connecting rod assembly, and the third connecting rod assembly are all synchronously driven by the main shaft to improve the linkage performance.

[0009] Two or more of the first embroidery machine head and the second embroidery machine head are arranged along the main shaft. An inter-head presser foot linkage device is installed between adjacent two embroidery machine heads to drive a presser foot driver inside the two embroidery machine heads. There is no connecting rod drive structure for the presser foot driver inside the first embroidery machine head and the second embroidery machine head, achieving the technical performance of reducing the presser foot drive structure inside a single machine head, narrowing the width of the machine head, and thus increasing the number of machine heads arranged on the main shaft.

[0010] As can be seen from the above, in the present invention, an inter-head presser foot linkage device is installed between the first embroidery machine head and the second embroidery machine head to drive the presser foot drivers inside their respective machine heads, realizing synchronous drive of the drive structure of the presser foot drivers between the machine heads, avoiding the drive structure for the presser foot driver installed inside the embroidery machine head, and effectively improving the utilization rate of the installation space in the axial direction of the main shaft of the embroidery machine. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0012] Figure 1 It is a three-dimensional structure schematic diagram of an embroidery machine head device with an inter-head presser foot linkage according to the present invention;

[0013] Figure 2 It is an internal three-dimensional structure schematic diagram of an embroidery machine head device with an inter-head presser foot linkage according to the present invention;

[0014] Figure 3 It is an installation structure schematic diagram of the first embroidery machine head in the present invention;

[0015] Figure 4 It is an installation structure schematic diagram of the second embroidery machine head in the present invention;

[0016] Figure 5 Schematic structural diagram of the presser foot linkage device between the machine heads in the present invention;

[0017] Figure 6 Schematic internal installation structure diagram of the first embroidery machine head in the present invention;

[0018] Figure 7 Schematic structural diagram of the second connecting rod assembly in the present invention;

[0019] Figure 8 Schematic structural diagram of the third connecting rod assembly in the present invention. Detailed implementation manners

[0020] The following combines the attached Figure 1-8 The detailed implementation manners will further describe the technical solutions of this patent in detail. The following will combine the drawings in this application to clearly and completely describe the technical solutions in this application. Obviously, the described embodiments are only a part of the embodiments of this application, rather than all the embodiments. Usually, the components of this application described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of this application provided in the drawings is not intended to limit the scope of this application that is required to be protected, but only represents the selected embodiments of this application. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative efforts belong to the scope of protection of this application. It should be noted that: similar reference numerals and letters represent similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings. At the same time, in the description of this application, the terms "first", "second", etc. are only used for distinguishing descriptions and cannot be understood as indicating or implying relative importance.

[0021] The reference numerals of each component of the present invention are as follows: the second embroidery machine head 1, the first guide shaft 2, the second guide shaft 3, the presser foot connecting rod 4, the third guide shaft 5, the fourth guide shaft 6, the first embroidery machine head 7, the first needle bar driver 8, the first presser foot driver 10, the second needle bar driver 11, the second presser foot driver 12, the third presser foot driver 15, the fourth presser foot driver 16, the fifth connecting rod 18, the main shaft 19, the mounting seat 20, the first positioning shaft 21, the fourth connecting rod 23, the second positioning shaft 24, the second connecting rod 25, the first connecting rod 26, the first pin shaft 30, the second connecting shaft 32, the third connecting shaft 33, the fifth connecting shaft 34, the seventh connecting rod 35, the fourth connecting shaft 36, the sixth connecting rod 37, the first driving connecting rod 43, the second driving connecting rod 44, the third needle bar driver 51, the fourth needle bar driver 52, the first connecting shaft 66, the first three-eye connecting rod 71, the second three-eye connecting rod 80, the eighth connecting rod 82, the ninth connecting rod 85, the eighth connecting shaft 86, the seventh connecting shaft 87, the sixth connecting shaft 88, the third connecting rod 99.

[0022] In the prior art, a needle bar driver, a presser foot driver and a supporting connecting rod structure need to be integrated inside the embroidery machine head, which makes it difficult to compress the width dimension of a single head along the main shaft direction. In the traditional design, the presser foot driving structure is independently arranged inside each head. When multiple heads are arranged along the main shaft, the driving components repeatedly arranged between adjacent heads occupy a large amount of axial space, restricting the improvement space of the number of heads per unit length of the main shaft. For example, in the double-head layout, the independent presser foot driving systems of the two heads form a double structural redundancy, resulting in low utilization rate of the axial space.

[0023] To solve the above problems, the R & D personnel of this application found that there are structural repetition defects in the traditional independent driving mode of the head. By analyzing the movement track of the presser foot, it is found that there is a need for synchronous action of the presser feet of adjacent heads, which provides the possibility for linkage driving. Further research proposes to mechanically link the presser foot driving systems of adjacent heads, and use the same driving source to control multiple presser feet, thereby eliminating the repeatedly arranged driving components. This idea breaks through the limitations of the traditional independent driving mode and opens up a new path for optimizing the axial layout of the head.

[0024] Therefore, the embroidery machine head device with inter-head presser foot linkage proposed in this application includes a first embroidery machine head 7 and a second embroidery machine head 1. A second guide shaft 3 is installed on the first embroidery machine head 7, and a second presser foot driver 12 is sleeved on the outer periphery of the second guide shaft 3. A third guide shaft 5 is installed on the second embroidery machine head 1, and a third presser foot driver 15 is sleeved on the outer periphery of the third guide shaft 5. It is characterized in that: the second presser foot driver 12 and the third presser foot driver 15 are driven by an inter-head presser foot linkage device. The inter-head presser foot linkage device includes a first connecting rod assembly driven by a main shaft 19. The first connecting rod assembly is respectively connected to a first connecting rod 26 and a second connecting rod 25 through a presser foot connecting rod 4. The first connecting rod 26 is connected to the second presser foot driver 12, and the second connecting rod 25 is connected to the third presser foot driver 15.

[0025] Among them, the inter-head presser foot linkage device refers to a mechanical transmission system arranged across two heads. Specifically, a rigid rod and a rotating shaft can be used to cooperate to achieve power transmission. Its function is to synchronously transmit the action of a single driving source to the presser foot drivers of different heads. As the core of power output, the main shaft can be configured outside or in the middle of the head, and the rotational motion is converted into a linear reciprocating motion through a crank connecting rod mechanism. The presser foot connecting rod, as a power distribution component, can be a rigid rod body with multiple connection points, and is used to synchronously distribute the power output by the main shaft to the presser foot driving connecting rods of different heads. The first connecting rod and the second connecting rod form a branch transmission structure to connect the presser foot drivers, ensuring that the two presser foot drivers perform synchronous lifting motions.

[0026] Specifically, when the main shaft rotates, it drives the first link assembly to generate a reciprocating motion, and this motion is synchronously transmitted to the first link and the second link through the presser foot link. The first link drives the second presser foot driver to move up and down along the second guide shaft, and the second link drives the third presser foot driver to move synchronously along the third guide shaft. Since the two presser foot drivers share the same drive source, there is no need to separately arrange independent presser foot drive link groups inside the first head and the second head, thus reducing the axial space occupation inside the two heads. This linkage structure enables the presser foot actions of adjacent heads to be synchronized, while avoiding the duplicate setting of drive components in the traditional design.

[0027] Compared with the prior art, in the traditional solution, an independent presser foot drive system is arranged inside each head, and the drive components between adjacent heads form an axial superposition, resulting in limited arrangement density of the heads. In this solution, through the cross-head linkage design, the presser foot drive systems of the two heads are integrated into a single transmission chain, eliminating the redundancy of the head drive structure. This structural innovation enables more heads to be arranged within the unit main shaft length while ensuring the normal realization of the presser foot functions of each head.

[0028] Through the above technical solution, this application effectively solves the problem of low axial space utilization rate of multi-head embroidery machines. After the presser foot linkage device structure between the heads replaces the traditional independent drive mode, the axial space originally used to set independent drive components is saved between adjacent heads, enabling an increase in the number of head installations under the same main shaft length. This solution achieves a breakthrough improvement in the layout density of the embroidery machine heads on the premise of ensuring the integrity of the presser foot function.

[0029] This application further proposes that the first link assembly includes a third link 99. The third link 99 is connected to the main shaft 19, and the third link 99 is also connected to one end of a fourth link 23 and a fifth link 18. The other end of the fifth link 18 is connected to a first positioning shaft 21. The other end of the fourth link 23 is connected to one end of a presser foot link 4. The other end of the presser foot link 4 is respectively connected to a first link 26 and a second link 25 through a first connecting shaft 66. The middle of the presser foot link 4 is connected to a mounting seat 20 on the side of a first embroidery machine head 7 through a second positioning shaft 24.

[0030] Wherein, the third connecting rod refers to a rigid rod that connects the main shaft and transmits power, and is used to convert the main shaft rotation motion into linear reciprocating motion. Wherein, the fourth connecting rod and the fifth connecting rod refer to branch connecting rods that are respectively hinged to the third connecting rod, and can be specifically implemented by a bifurcated hinge structure, and are used to divert power to the presser foot connecting rod. Wherein, the presser foot connecting rod refers to a transmission rod that spans between the fourth connecting rod and the third connecting rod 99 of the driving component, and can be specifically implemented by setting hinge holes at both ends of a linear rod body, and is used to synchronously transmit power to the presser foot drivers of different machine heads. Wherein, the first connecting shaft 66 refers to a rotating shaft that runs through the end of the presser foot connecting rod and is hinged with the first connecting rod and the second connecting rod, and can be specifically implemented by a stepped shaft with a bearing structure, and is used to realize a pivot connection for multi-directional power transmission. Wherein, the second positioning shaft refers to a positioning component that is fixed to the mounting seat and runs through the middle section of the presser foot connecting rod, and can be specifically implemented by a bolt with a sleeve structure, and is used to limit the lateral displacement of the presser foot connecting rod and maintain the transmission trajectory accuracy.

[0031] Specifically, when the main shaft rotates, the third connecting rod is driven to swing, and the third connecting rod pushes the presser foot connecting rod to rotate around the second positioning axis through the fourth connecting rod. At the same time, the fifth connecting rod transmits part of the power to the first positioning axis to balance the force. The first connecting shaft 66 synchronously drives the first connecting rod and the second connecting rod, thereby controlling the linkage between the second presser foot driver and the third presser foot driver. The design of fixing the second positioning axis to the mounting seat makes it possible for the presser foot connecting rod to achieve stable transmission without the need for an additional supporting structure, and directly utilizes the existing mounting points on the side of the machine head.

[0032] Compared with the prior art, each presser foot driver in the traditional solution needs to be independently provided with a driving connecting rod and a positioning structure, which results in an increase in the axial space occupied by the machine head. This solution uses a single presser foot connecting rod to bridge the two machine heads, and uses the mounting seat to integrate the positioning function, thereby reducing the space requirement of the driving structure.

[0033] Through the above technical solution, the present application realizes the synchronous control of the two machine head presser foot drivers, while eliminating the need for independent positioning shafts and support structures, so that the arrangement spacing of the machine heads along the main axis direction can be reduced. Therefore, under the same main axis length, the number of machine heads can be increased, and the transmission stability is guaranteed by the rigid connection between the second positioning shaft and the mounting seat.

[0034] The present application further provides an embroidery machine head device with a presser foot linkage between the heads. The first embroidery machine head 7 is a double-needle bar head, and the double-needle bar head 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 link assembly; the second embroidery machine head 1 is a double-needle bar head, and the double-needle bar head 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 link assembly.

[0035] The second link assembly includes a first pin shaft 30 connecting the first embroidery machine head 7. A first connecting shaft tube 71 at one end of a first three-eye link is sleeved on the outer periphery of the first pin shaft 30. A second connecting shaft tube 31 in the middle of the first three-eye link is sleeved with a second connecting shaft 32. The second connecting shaft 32 is connected to a first driving link 43. The first driving link 43 is connected to the main shaft 19. A third connecting shaft tube 9 at the other end of the first three-eye link is respectively connected to a sixth link 37 and a seventh link 35 at both ends through a third connecting shaft 33. The sixth link 37 is connected to the connecting first needle bar driver 8 through a fourth connecting shaft 36. The seventh link 35 is connected to the connecting second needle bar driver 11 through a fifth connecting shaft 34.

[0036] The third link assembly includes a first positioning shaft 21 connecting the second embroidery machine head 1. A fourth connecting shaft tube 80 at one end of a second three-eye link is sleeved on the outer periphery of the first positioning shaft 21. A fifth connecting shaft tube 81 in the middle of the second three-eye link is sleeved with a sixth connecting shaft 88. The sixth connecting shaft 88 is connected to a second driving link 44. The second driving link 44 is connected to the main shaft 19. A seventh connecting shaft tube 84 at the other end of the first three-eye link is respectively connected to an eighth link 82 and a ninth link 85 at both ends through a seventh connecting shaft 87. The eighth link 82 is connected to the connecting third needle bar driver 51 through a seventh connecting shaft 83. The ninth link 85 is connected to the connecting fourth needle bar driver 52 through an eighth connecting shaft 86.

[0037] Among them, the double-needle-bar head refers to a structure with two independent embroidery needle bars integrated in a single head, which can be specifically realized by a guiding shaft and a driver arranged coaxially side by side. Through a synchronous driving mechanism, the two needle bars work synchronously. Among them, the second connecting rod assembly refers to a mechanical linkage mechanism for transmitting the power of the main shaft and controlling the synchronous movement of the drivers inside the double-needle-bar head, which can be specifically realized by a three-eye connecting rod and a multi-axis connection structure. Among them, the third connecting rod assembly refers to a driving mechanism symmetrically arranged with the second connecting rod assembly, which can specifically adopt the same structural form as the second connecting rod assembly to enable the double-needle bars of the second embroidery machine head to move synchronously.

[0038] Compared with the prior art, traditional double-needle-bar heads usually adopt two sets of independent connecting rods to drive two needle-bar drivers respectively, resulting in a relatively large lateral space occupation. Through the transmission design of the three-eye connecting rod in this solution, the movements of the two sets of driving mechanisms are integrated into a single connecting rod system, significantly reducing the lateral layout space requirements while ensuring the synchronous accuracy.

[0039] Through the above technical solution, the present application effectively reduces the lateral dimension of the driving structure inside the double-needle-bar head, enabling multiple embroidery machine heads to be arranged along the axial direction of the main shaft with a higher density, and increasing the number of heads under the condition of limiting the length of the main shaft.

[0040] The present application further proposes that a first presser-foot driver 10 and a first needle-bar driver 8 are simultaneously sleeved on the outer periphery of the first guiding shaft 2, a second presser-foot driver 12 and a second needle-bar driver 11 are simultaneously sleeved on the outer periphery of the second guiding shaft 3, a third presser-foot driver 15 and a third needle-bar driver 51 are simultaneously sleeved on the outer periphery of the third guiding shaft 5, and a fourth presser-foot driver 16 and a fourth needle-bar driver 52 are simultaneously sleeved on the outer periphery of the fourth guiding shaft 6.

[0041] The first needle-bar driver 8 and the second needle-bar driver 11 are driven by the second connecting rod assembly inside the first embroidery machine head 7 to move synchronously up and down. The third needle-bar driver 51 and the fourth needle-bar driver 52 are driven by the third connecting rod assembly inside the second embroidery machine head 1 to move synchronously up and down. The second presser-foot driver 12 and the third presser-foot driver 15 are driven by the first connecting rod assembly to move synchronously up and down. The first connecting rod assembly, the second connecting rod assembly, and the third connecting rod assembly are all synchronously driven by the main shaft 19.

[0042] Among them, sleeving means that the presser-foot driver and the needle-bar driver are installed on the outer periphery of the guiding shaft in a coaxial nested manner, and the synchronous movement of the two can be specifically realized by means of keyway fitting or bearing connection. The guiding shaft serves as a common carrier for support and transmission, and simultaneously bears the vertical reciprocating movements of the presser-foot driver and the needle-bar driver. By integrating the presser-foot driver and the needle-bar driver on the same guiding shaft, the number of independent driving structures inside the head can be reduced, thereby compressing the width of the head.

[0043] Specifically, the first guiding shaft connects the first presser foot driver and the first needle bar driver through its outer peripheral surface. When the guiding shaft moves vertically, both of them drive the presser foot and the needle bar to act synchronously. The second guiding shaft, the third guiding shaft, and the fourth guiding shaft adopt the same structure, enabling each head to complete the driving tasks of the double needle bars and the double presser feet with only two guiding shafts. Thus, the presser foot driving shaft and the needle bar driving shaft that originally needed to be separately arranged inside the head are combined into the same guiding shaft, reducing the space occupied by the mechanical structure.

[0044] Compared with the prior art, the traditional embroidery machine head needs to separately set independent guiding shafts and driving components for the presser foot driver and the needle bar driver, resulting in a complex internal structure of the head and a relatively large axial dimension. This solution realizes the synchronous control of the two drivers by sharing the guiding shaft, significantly reducing the number of internal components of the head and the layout space requirement while ensuring the integrity of functions.

[0045] Through the above technical solution, this application effectively solves the problem that the width of the embroidery machine head cannot be reduced. The coaxial integrated design of the presser foot driver and the needle bar driver increases the axial arrangement density of the driving structure inside a single head, allowing more heads to be accommodated within the unit length of the main shaft. This provides a structural basis for increasing the number of heads under a limited main shaft length, breaking through the bottleneck that the number of heads has reached the limit in the prior art.

[0046] Specifically, the rotational motion of the main shaft is transmitted to the presser foot driver and the needle bar driver through the first link assembly, the second link assembly, and the third link assembly respectively. The second link assembly is connected to the shaft tube of the first three-eye link through the first pin shaft, converting the rotation of the main shaft into the linear reciprocating motion of the first needle bar driver and the second needle bar driver, enabling the two needle bars of the double needle bar head to move up and down synchronously. The third link assembly is connected to the shaft tube of the second three-eye link through the first positioning shaft, converting the rotation of the main shaft into the linear reciprocating motion of the third needle bar driver and the fourth needle bar driver, realizing the synchronous action of another double needle bar head. The first link assembly connects the second presser foot driver and the third presser foot driver through the presser foot link, enabling both of them to move synchronously with the drive of the main shaft. The above three link assemblies are all driven by the same main shaft, and there is no need to set independent drive sources or additional linkage mechanisms during the transmission process, thus reducing the space occupied by the internal structure of the head.

[0047] Compared with the prior art, in the prior art, each head needs to separately set the transmission structures for the presser foot driver and the needle bar driver, resulting in the width of the head being limited by the complex internal link layout. However, in this solution, the presser foot linkage device across the heads and the double needle bar transmission components inside the head are synchronously driven by the main shaft, enabling the movements of multiple drivers to be controlled by the same main shaft without repeating the drive structures in each head, thus significantly simplifying the internal space layout of the head.

[0048] Through the above technical solution, the present application realizes the synchronous driving of the presser foot drivers between multiple heads and the double-needle bar drivers within the same head, reduces the number of independent transmission components inside each head, compresses the width of the head along the main shaft direction, so that more heads can be installed under the same main shaft length, and solves the problem of limited number of heads caused by complex structure in the prior art.

[0049] The present application further proposes that two or more of the first embroidery machine head 7 and the second embroidery machine head 1 are arranged along the main shaft 19, and a presser foot linkage device is installed between adjacent embroidery machine heads to drive one presser foot driver inside the two embroidery machine heads. The connecting rod driving structure of the presser foot driver is not installed inside the first embroidery machine head 7 and the second embroidery machine head 1.

[0050] Among them, arranging along the main shaft means that multiple heads are arranged in sequence along the axial direction of the main shaft. For example, the main shaft can extend horizontally and the heads are fixed on its surface at certain intervals. This arrangement reduces the axial occupied space of a single head by sharing the linkage device, so as to increase the number of heads under the limited main shaft length. The presser foot linkage device between heads refers to an independent transmission mechanism installed between adjacent heads, such as a structure including a connecting rod assembly and a connecting shaft, which can transmit the driving force across the heads. This device replaces the connecting rod structure of the presser foot driver independently arranged inside the traditional head, reduces the number of components inside the head, and further reduces its width dimension. The connecting rod driving structure without the presser foot driver means that the special transmission connecting rod of the presser foot driver is cancelled inside the head, for example, the power transmission function of the presser foot driver is transferred to the external linkage device to achieve. This design simplifies the internal layout of the head, avoids redundancy of the transmission structure, and provides a basic condition for reducing the head size.

[0051] Compared with the prior art, each head of the traditional embroidery machine needs to independently set a connecting rod structure for the presser foot driver, resulting in that the width of a single head cannot be further reduced, and the number of heads reaches the limit under the limitation of the main shaft length. However, in this solution, the external linkage device replaces the internal transmission structure. On the premise of maintaining the presser foot driving function, the axial dimension of a single head is significantly reduced, so that more heads can be densely arranged within the same main shaft length, breaking through the bottleneck of the prior art.

[0052] Through the above technical solution, the present application effectively solves the problem that the number of embroidery machine heads is limited by the main shaft length. By canceling the connecting rod structure of the presser foot driver inside the head and adopting an external linkage device, the width of a single head is reduced by about 20%-30%, significantly improving the working efficiency of the embroidery machine and the bearing capacity of the pattern complexity.

[0053] Through the above technical solutions, on the premise of maintaining the synchronous driving function of the presser foot, the axial installation size of a single headstock is significantly reduced. This enables more embroidery machine headstocks to be arranged under the same spindle length, breaking through the physical limitation of the number of headstocks in the traditional structure. At the same time, due to the simplification of the internal structure of the headstock, the overall mechanical complexity is reduced, which is beneficial to improving the reliability of the equipment and reducing the manufacturing cost.

[0054] The above are only the embodiments of the present application and are not intended to limit the protection scope of the present application. For those skilled in the art, various changes and modifications can be made to the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

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

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

3. The embroidery machine head device with presser foot linkage between the heads according to claim 1, characterized in that: The first embroidery machine head (7) is a double-needle bar head. The double-needle bar head 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 link assembly. The second embroidery machine head (1) is a double-needle bar head. The double-needle bar head 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 link assembly.

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

5. The embroidery machine head device with presser foot linkage between the heads according to claim 3, characterized in that: The third link assembly described above includes a first positioning shaft (21) connected to the second embroidery machine head (1). A fourth connecting shaft tube (80) at one end of the second three - eye link is sleeved on the outer periphery of the first positioning shaft (21). A fifth connecting shaft tube (81) in the middle of the second three - eye link is sleeved with a sixth connecting shaft (88). The sixth connecting shaft (88) is connected to the second driving link (44). The second driving link (44) is connected to the main shaft (19). A seventh connecting shaft tube (84) at the other end of the first three - eye link is respectively connected to an eighth link (82) and a ninth link (85) at both ends through a seventh connecting shaft (87). The eighth link (82) is connected to the third needle bar driver (51) through a seventh connecting shaft (83). The ninth link (85) is connected to the fourth needle bar driver (52) through an eighth connecting shaft (86).

6. The embroidery machine head device with a presser foot linkage between the heads according to claim 1, characterized in that: A first presser - foot driver (10) and a first needle bar driver (8) are simultaneously sleeved on the outer periphery of the first guiding shaft (2). A second presser - foot driver (12) and a second needle bar driver (11) are simultaneously sleeved on the outer periphery of the second guiding shaft (3). A third presser - foot driver (15) and a third needle bar driver (51) are simultaneously sleeved on the outer periphery of the third guiding shaft (5). A fourth presser - foot driver (16) and a fourth needle bar driver (52) are simultaneously sleeved on the outer periphery of the fourth guiding shaft (6).

7. The embroidery machine head device with presser foot linkage between the heads 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 a second link 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 a third link 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 a first link assembly. The first link assembly, the second link assembly, and the third link assembly are all synchronously driven by the main shaft (19).

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

9. The embroidery machine head device with a presser foot linkage between the heads according to claim 1, characterized in that: There is no link - drive structure for the presser - foot driver installed inside the first embroidery machine head (7) and the second embroidery machine head (1).

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