A presser foot device for an embroidery machine

Abstract

The utility model relates to embroidery machine technical field, specifically discloses a kind of presser foot device of embroidery machine, including presser foot main part, the bottom of presser foot main part is equipped with movable slot, the inner chamber of presser foot main part is equipped with placing groove, positioning assembly is provided on presser foot main part, positioning assembly includes electric push rod, and electric push rod is located in the top of placing groove inner chamber, the output end of electric push rod is provided with push plate, the both ends of push plate bottom are provided with push rod, the bottom of two push rods is provided with positioning plate, and positioning plate is located in the inner chamber of movable slot, the both ends of positioning plate two sides are equipped with guide block, the both ends of movable slot inner chamber two sides are equipped with guide groove compatible with guide block. Precise height is adjusted by electric push rod drive positioning plate, solve the problem of traditional manual adjustment inaccuracy, while protection assembly effectively avoid needle head mistake hurt, with the advantages of improving positioning accuracy and operating safety.

Description

Technical Field

[0001] This utility model relates to the field of embroidery machine technology, specifically to a presser foot device for an embroidery machine. Background Technology

[0002] Existing presser foot positioning devices for embroidery machines typically consist of a presser foot body with a sewing groove and a positioning groove, within which a positioning plate slides. The height of the positioning plate can be adjusted via an adjustment mechanism to accommodate fabrics of varying thicknesses. However, this adjustment mechanism requires manual operation, leading to inaccurate adjustments and poor positioning results. Furthermore, traditional presser foot devices lack effective needle protection during installation, leaving the needle exposed inside the presser foot and posing a significant safety hazard of accidental injury to workers. These issues severely impact the efficiency and operational safety of embroidery machines.

[0003] To address the aforementioned issues, existing technologies urgently need improvement. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a presser foot device for an embroidery machine, which has the advantages of improving positioning accuracy and operational safety.

[0005] This application provides a presser foot device for an embroidery machine, the technical solution of which is as follows: The device includes a presser foot body, with a movable groove at the bottom and a placement groove in the inner cavity. A positioning assembly is provided on the presser foot body, including an electric push rod located at the top of the placement groove. A push plate is provided at the output end of the electric push rod, and push rods are provided at both ends of the bottom of the push plate. A positioning plate is provided at the bottom of the two push rods, and the positioning plate is located in the inner cavity of the movable groove. Guide blocks are provided at both ends of both sides of the positioning plate, and guide grooves that match the guide blocks are provided at both ends of both sides of the movable groove.

[0006] Furthermore, this application also proposes that a protective component is provided on the main body of the presser foot. The protective component includes two connecting plates, which are located at the two ends of the right side of the top of the presser foot. A threaded sleeve is fixedly fitted inside the inner cavity of the connecting plate, and a fixing rod is threaded inside the inner cavity of the threaded sleeve. A turntable is provided at one end of the fixing rod, and a protective cylinder is provided at the other end of the fixing rod. The protective cylinder is located in the U-groove on the main body of the presser foot, and locking holes adapted to the fixing rod are opened on both sides of the protective cylinder.

[0007] Furthermore, this application also proposes that the surface of the turntable is provided with anti-slip threads, and the number of anti-slip threads is not less than fifteen.

[0008] Furthermore, this application also proposes that both sides of the electric push rod are fixedly connected to a fixing frame, and the other end of the fixing frame is fixedly connected to the placement slot.

[0009] Furthermore, this application also proposes that the top and bottom of the push rod are fixedly connected to the push plate and the positioning plate by connecting blocks, and the two push rods are arranged symmetrically about the push plate.

[0010] Furthermore, this application also proposes that mounting plates are provided at both ends of the top of the presser foot body, and mounting holes are provided in the inner cavity of the mounting plates.

[0011] As can be seen from the above, the presser foot device and its protective components for an embroidery machine provided in this application precisely adjust the height of the positioning plate by driving the electric push rod, which solves the problem of inaccuracy in traditional manual adjustment. At the same time, the protective components effectively prevent needle tip injury, and have the advantages of improving positioning accuracy and operational safety. Attached Figure Description

[0012] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings: Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a partial cross-sectional view of the main body of the presser foot of this utility model; Figure 3 This is a schematic diagram of the positioning component structure of this utility model; Figure 4 This is a schematic diagram of the protective component structure of this utility model; Figure 5 This is a schematic diagram of the protective cylinder structure of this utility model.

[0013] In the diagram: 1. Presser foot body; 2. Mounting plate; 3. Protective components; 301. Connecting plate; 302. Turntable; 303. Fixing rod; 304. Protective cylinder; 305. Screw sleeve; 306. Locking hole; 4. Placement slot; 5. Movable slot; 6. Guide slot; 7. Positioning components; 701. Electric push rod; 702. Fixing frame; 703. Push plate; 704. Push rod; 705. Connecting block; 706. Guide block; 707. Positioning plate. Detailed Implementation

[0014] The following drawings will disclose several embodiments of this utility model. For clarity, many practical details will be described in the following description. However, it should be understood that these practical details should not be used to limit this utility model. That is, in some embodiments of this utility model, these practical details are not essential. In addition, for the sake of simplicity, some conventional structures and components will be shown in the drawings in a simple schematic manner.

[0015] Please see Figure 1-5In existing technologies, the presser foot device of embroidery machines typically uses manual adjustment of the positioning plate 707, which results in insufficient positioning accuracy during operation. Due to the lack of an automated adjustment mechanism, operators need to repeatedly adjust the position of the positioning plate 707, which can easily lead to unstable fabric fixation due to human error. Furthermore, traditional presser foot devices lack a protective structure for the needle, leaving the needle exposed during installation, posing a safety hazard and potentially causing accidental injury to the operator.

[0016] To address the aforementioned issues, researchers found that manual adjustment mechanisms were insufficient to guarantee the precise movement of the positioning plate 707, necessitating the exploration of automated, precise control. Considering the advantage of controllable stroke in electric actuators, an attempt was made to incorporate an electric push rod 701 into the pressure foot device. To resolve the offset issue during the movement of the positioning plate 707, a guide structure needed to be designed to ensure a vertical motion trajectory. By combining the drive mechanism with the guide assembly, a stable positioning and adjustment system was formed.

[0017] Therefore, this application proposes a device including a presser foot body 1. The presser foot body 1 has a movable groove 5 at its bottom and a placement groove 4 in its inner cavity. The positioning component 7 includes an electric push rod 701 located at the top of the placement groove 4. The output end of the electric push rod 701 is connected to a push plate 703. Push rods 704 are provided at both ends of the bottom of the push plate 703. The bottom of the push rods 704 is connected to a positioning plate 707 located in the movable groove 5. Guide blocks 706 are provided on both sides of the positioning plate 707. Guide grooves 6 that cooperate with the guide blocks 706 are provided on both sides of the inner cavity of the movable groove 5.

[0018] The movable groove 5 refers to the elongated cavity located at the bottom of the pressure foot body 1, used to accommodate the lifting and lowering movement of the positioning plate 707. Specifically, it can be implemented using a rectangular cross-section groove, with its depth slightly greater than the thickness of the positioning plate 707 to ensure sufficient space for movement. The electric push rod 701 refers to the actuator that achieves linear extension and retraction through electric drive. Specifically, it can be implemented using a servo electric cylinder with a built-in encoder, used to precisely control the displacement of the push plate 703.

[0019] The guide block 706 guide groove 6 mating structure refers to the sliding pair set between the two sides of the positioning plate 707 and the inner wall of the movable groove 5. Specifically, it can be implemented by using a dovetail groove or a T-shaped guide rail structure, which is used to restrict the positioning plate 707 to move only in the vertical direction.

[0020] The push rod 704 connection structure refers to the rigid transmission component that connects the push plate 703 and the positioning plate 707. Specifically, it can be implemented using a cylindrical metal rod, with both ends fixed by threads or welding, and is used to transmit the driving force of the electric push rod 701.

[0021] Specifically, when the electric push rod 701 is powered on, its output shaft drives the push plate 703 to move downwards. The push rods 704, symmetrically arranged on both sides, push the positioning plate 707 vertically downwards along the guide groove 6. The cooperation between the guide block 706 and the guide groove 6 effectively prevents the positioning plate 707 from shifting horizontally during movement, ensuring a uniform distribution of pressure applied by the presser foot to the fabric. The placement groove 4 provides installation space for the electric push rod 701, and the opening position of the movable groove 5 corresponds to the working area of ​​the presser foot, enabling the positioning plate 707 to accurately reach the predetermined pressing position.

[0022] Compared to existing technologies, current devices rely on manually rotating a lead screw to adjust the height of the positioning plate 707, resulting in low adjustment accuracy and poor operational efficiency. This solution replaces the manual adjustment mechanism with an electric push rod 701, achieving precise digital control of the positioning height. Compared to traditional sliding rod designs, the guide block 706's guide groove 6 structure increases the contact area, significantly reducing the vibration amplitude of moving parts during high-speed operation.

[0023] Through the above technical solution, this application achieves automated and precise adjustment of the presser foot positioning height, eliminating positioning errors caused by manual operation. The mating structure of the guide block 706 and guide groove 6 ensures that the positioning plate 707 maintains a stable movement trajectory during lifting and lowering, avoiding uneven fabric indentations caused by offset. The integrated design of the electric push rod 701 simplifies the operation process, enabling the presser foot device to quickly adapt to the processing needs of fabrics of different thicknesses.

[0024] This application further proposes that a protective component 3 is provided on the presser foot body 1. The protective component 3 includes two connecting plates 301, and the two connecting plates 301 are respectively located at both ends of the right side of the top of the presser foot. A threaded sleeve 305 is fixedly sleeved in the inner cavity of the connecting plate 301. A fixing rod 303 is threadedly sleeved in the inner cavity of the threaded sleeve 305. A turntable 302 is provided at one end of the fixing rod 303, and a protective cylinder 304 is provided at the other end of the fixing rod 303. The protective cylinder 304 is located in the U-groove on the presser foot body 1. Both sides of the protective cylinder 304 are provided with locking holes 306 that are adapted to the fixing rod 303.

[0025] The connecting plate 301 is a plate-shaped structure used to support the threaded sleeve 305. It can be made of sheet metal cut into shape and fixed to the pressure foot body 1 by welding or bolting. Its inner cavity forms a fixed space to accommodate the threaded sleeve 305. The threaded sleeve 305 is a sleeve structure with internal threads, which can be made of brass or stainless steel. It is fixed to the inner cavity of the connecting plate 301 by interference fit or welding, forming a threaded transmission relationship with the fixing rod 303. The fixing rod 303 is a rod-shaped component with external threads, which can be made of steel screw. It drives the protective cylinder 304 to move along the axis through rotation. The turntable 302 is a rotating operating component located at the end of the fixing rod 303. It can be an injection-molded plastic disc with anti-slip texture on the surface to enhance operating friction. The protective cylinder 304 is a cylindrical structure with a U-shaped cross-section, which can be made of extruded aluminum alloy. The locking holes 306 on both sides are used to form a plug-in connection with the end of the fixing rod 303.

[0026] Specifically, when a protective structure needs to be installed, the protective cylinder 304 is pre-placed into the U-groove of the presser foot body 1. Rotating the turntable 302 drives the fixing rod 303 through threaded transmission within the screw sleeve 305, causing the end of the fixing rod 303 to gradually insert into the locking holes 306 on both sides of the protective cylinder 304. As the fixing rod 303 continues to screw in, the protective cylinder 304 is pressed and fixed within the U-groove, forming a protective enclosure for the needle. For disassembly, rotating the turntable 302 in the opposite direction releases the locking between the fixing rod 303 and the protective cylinder 304, facilitating quick replacement or maintenance.

[0027] Compared to existing technologies, traditional presser foot devices lack an adjustable protective structure, and the exposed needle during installation can easily lead to accidental injury. This solution achieves precise positioning of the protective sleeve 304 through a threaded transmission mechanism, and utilizes the insertion and engagement of the fixing rod 303 and the locking hole 306 to form a stable fixation, avoiding positioning deviations caused by manual adjustment. The U-shaped structure of the protective sleeve 304 can completely cover the sharp part of the needle, effectively isolating the operator from the danger zone.

[0028] Through the above technical solution, this application solves the safety hazard caused by exposed needles during presser foot installation by using a detachable protective sleeve 304 structure to cover the needle tip when not in operation. The threaded transmission mechanism ensures precise and controllable installation position of the protective sleeve 304, eliminating the problem of inaccurate positioning caused by manual adjustment. The protective component 3 and the presser foot body 1 form a modular design, ensuring safety without affecting the normal operation of the equipment.

[0029] This application further proposes that the surface of the turntable 302 is provided with anti-slip threads, and the number of anti-slip threads is not less than fifteen.

[0030] The anti-slip threads refer to the raised texture on the surface of the turntable 302, which can be achieved through rolling or injection molding processes to increase the friction between the operator's hand and the turntable 302. The requirement of "no less than fifteen" refers to the number of anti-slip threads distributed on the surface of the turntable 302, such as sixteen or twenty. These threads can be arranged in an evenly spaced circular pattern to ensure uniform distribution and enhance the anti-slip effect.

[0031] Specifically, the anti-slip threads increase the coefficient of friction on the surface of the turntable 302, allowing the operator to apply force more stably when manually rotating the turntable 302, avoiding adjustment deviations caused by slippage. By setting no fewer than fifteen anti-slip threads, the spacing between the threads is controlled within a small range, thus forming a continuous anti-slip area in the circumferential direction of the turntable 302, further reducing the possibility of slippage during operation. For example, when the operator adjusts the position of the protective cylinder 304 using the turntable 302, the anti-slip threads provide sufficient resistance to ensure that the turntable 302 moves only within a controlled rotation angle range, thereby improving adjustment accuracy.

[0032] Compared to existing technologies, the turntable 302 of the presser foot in existing embroidery machines typically has a smooth surface or only a few anti-slip textures. During operation, it is prone to slippage due to sweaty hands or uneven force, which affects adjustment efficiency and positioning accuracy. This application significantly improves the operational stability of the turntable 302 by increasing the number of anti-slip threads and optimizing their distribution, making the position adjustment process of the protective cylinder 304 more reliable.

[0033] Through the above technical solution, this application solves the problem of positioning deviation caused by insufficient friction when manually adjusting the turntable 302, and reduces operational errors caused by the slippage of the turntable 302. Thus, while improving the fabric fixing effect, it reduces the risk of accidental needle contact during installation.

[0034] This application further proposes that both sides of the electric push rod 701 are fixedly connected to the fixing bracket 702, and the other end of the fixing bracket 702 is fixedly connected to the placement groove 4.

[0035] The fixing frame 702 is a rigid structural component used to support and fix the electric actuator 701. It can be made by stamping metal sheets and then welding or bolting them together. Its function is to distribute the vibration load of the electric actuator 701 during operation. The placement groove 4 is a recessed structure inside the pressure foot body 1 used to accommodate the electric actuator 701. It can be formed by machining or casting. Its inner wall is connected to the fixing frame 702 to form a stable support interface.

[0036] Specifically, the two ends of the fixing bracket 702 are rigidly connected to the side wall of the housing of the electric actuator 701 and the inner wall of the placement slot 4, respectively, forming a triangular support structure. When the electric actuator 701 performs a telescopic action, the axial force generated by the actuator 704 is transmitted to the side wall of the placement slot 4 through the fixing bracket 702, preventing the electric actuator 701 body from bearing lateral torque. The fixing bracket 702 can be installed in the middle section of the housing of the electric actuator 701 or near the output end. For example, two sets of L-shaped brackets can be symmetrically arranged on both sides of the electric actuator 701, and the ends of the brackets are fixed in the threaded holes of the side wall of the placement slot 4 by countersunk screws.

[0037] Compared with existing technologies, the electric push rod 701 of the traditional presser foot device is usually fixed only by the bottom flange, which is prone to swinging and displacement under frequent start-stop conditions. This solution forms multi-point constraints through double-sided fixing brackets 702, which effectively suppresses the radial movement of the push rod 704 during operation, and at the same time ensures that the axis of the push rod 704 is always perpendicular to the movement direction of the positioning plate 707, avoiding abnormal wear of the guide block 706 and guide groove 6 due to angular deviation.

[0038] Through the above technical solution, this application solves the problem of decreased positioning accuracy caused by vibration during long-term use of electric push rod 701, enables positioning plate 707 to maintain a linear motion trajectory during lifting, extends the service life of guide block 706 guide groove 6 mating structure, and reduces equipment maintenance frequency.

[0039] This application further proposes that the top and bottom of the push rod 704 are fixedly connected to the push plate 703 and the positioning plate 707 by the connecting block 705, and the two push rods 704 are arranged in a centrally symmetrical manner about the push plate 703.

[0040] The connecting block 705 is a fixing structure used to connect the push rod 704 to the push plate 703 and the positioning plate 707. It can be implemented by welding or bolting. Its function is to enhance the connection strength between the push rod 704 and the push plate 703 and positioning plate 707, preventing the push rod 704 from loosening or falling off during movement. The centrally symmetrical arrangement means that the two push rods 704 are mirror-image distributed about the central axis of the push plate 703. This can be achieved by symmetrically distributed mounting holes at both ends of the bottom of the push plate 703. Its function is to evenly distribute the thrust transmitted by the push rod 704 to the positioning plate 707, preventing the positioning plate 707 from tilting due to uneven force.

[0041] Specifically, the top of the push rod 704 is fixed to the push plate 703 via a connecting block 705, and the bottom is fixed to the positioning plate 707 via another connecting block 705, forming a rigid connection structure. When the electric push rod 701 drives the push plate 703 to press down, the thrust is transmitted to the positioning plate 707 through the two symmetrically arranged push rods 704, causing the positioning plate 707 to move smoothly in the vertical direction under the guidance of the guide groove 6. Because the push rods 704 adopt a centrally symmetrical layout, the thrust on both sides of the positioning plate 707 is of the same magnitude, thereby ensuring that the positioning plate 707 remains horizontal in the movable groove 5 and avoiding jamming or displacement caused by force on one side.

[0042] Compared with existing technologies, the existing positioning devices typically use direct welding or threaded connections between the push rod 704, push plate 703, and positioning plate 707. This is prone to breakage at the connection due to stress concentration, and the single push rod 704 structure can easily cause uneven stress on the positioning plate 707. This solution disperses the stress at the connection by using a connecting block 705, and at the same time uses a symmetrical layout of double push rods 704 to balance the thrust distribution, effectively improving the stability and positioning accuracy of the positioning plate 707.

[0043] Through the above technical solution, this application can enhance the connection reliability between push rod 704, push plate 703, and positioning plate 707, eliminate the problem of skewing caused by uneven force during the lifting process of positioning plate 707, thereby improving the positioning effect of presser foot device on fabric, while reducing wear at the connection of push rod 704 and extending the service life of device.

[0044] This application further proposes that mounting plates 2 are provided at both ends of the top of the presser foot body 1, and mounting holes are provided in the inner cavity of the mounting plates 2.

[0045] The mounting plate 2 is a plate-like structure fixed to the top of the presser foot body 1. It can be made of metal or high-strength plastic and is rigidly connected to the presser foot body 1 via welding or bolts. The function of the mounting plate 2 is to provide a docking interface between the presser foot device and the embroidery machine body, ensuring installation stability. The mounting hole is a through-hole structure penetrating the inner cavity of the mounting plate 2. It can be designed as a circular or elliptical hole, with a diameter matching standard bolt or screw specifications, facilitating the fixing of the presser foot device to the corresponding position on the embroidery machine using bolts or screws. The mounting hole simplifies the installation process and improves connection strength.

[0046] Specifically, mounting plates 2 are symmetrically distributed at both ends of the top of the presser foot body 1. Through mounting holes, they engage with the fixing structure on the embroidery machine body, enabling quick positioning and fixation of the presser foot device. The mounting plates 2 and the presser foot body 1 are either integrally molded or assembled separately to ensure structural strength. The position of the mounting holes can be adjusted according to the embroidery machine model; for example, the hole diameter can be set to 4-6 mm to accommodate different sizes of fixing bolts. During installation, the operator passes the bolts through the mounting holes and tightens them into the threaded holes of the embroidery machine to complete the secure installation of the presser foot device.

[0047] Compared to existing technologies, the presser foot devices of current embroidery machines typically rely on complex adjustment mechanisms for positioning. This solution, however, uses a standardized connector directly to fix the presser foot device through the cooperation of the mounting plate 2 and the mounting holes, eliminating the need for additional adjustment steps. The positioning deviation problem caused by manual adjustment in existing technologies is avoided, and the symmetrical design of the mounting plates 2 significantly improves the stability of the presser foot device during high-speed operation.

[0048] Through the above technical solution, this application solves the problem of inaccurate positioning caused by manual adjustment during the installation of the presser foot device, and reduces operational complexity through standardized installation interfaces. The cooperation between the mounting plate 2 and the mounting holes not only improves the installation efficiency of the presser foot device, but also enhances its vibration resistance during the operation of the embroidery machine, thereby reducing the risk of equipment failure caused by loosening.

[0049] The above description is merely an embodiment of this utility model and is not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principle of this utility model should be included within the scope of the claims of this utility model.

Claims

1. A presser foot device for an embroidery machine, comprising a presser foot body (1), characterized in that: The bottom of the presser foot body (1) is provided with an active groove (5), and the inner cavity of the presser foot body (1) is provided with a placement groove (4). The presser foot body (1) is provided with a positioning component (7). The positioning component (7) includes an electric push rod (701), and the electric push rod (701) is located at the top of the inner cavity of the placement groove (4). The output end of the electric push rod (701) is provided with a push plate (703). Both ends of the bottom of the push plate (703) are provided with push rods (704). The bottom of the two push rods (704) is provided with a positioning plate (707), and the positioning plate (707) is located in the inner cavity of the active groove (5). Both ends of both sides of the positioning plate (707) are provided with guide blocks (706), and both ends of both sides of the inner cavity of the active groove (5) are provided with guide grooves (6) that are adapted to the guide blocks (706).

2. The presser foot device of an embroidery machine according to claim 1, characterized in that: The presser foot body (1) is provided with a protective component (3). The protective component (3) includes two connecting plates (301), and the two connecting plates (301) are located at the two ends of the right side of the top of the presser foot. The inner cavity of the connecting plate (301) is fixedly fitted with a screw sleeve (305). The inner cavity of the screw sleeve (305) is threaded with a fixing rod (303). One end of the fixing rod (303) is provided with a turntable (302), and the other end of the fixing rod (303) is provided with a protective cylinder (304). The protective cylinder (304) is located in the U groove on the presser foot body (1). Both sides of the protective cylinder (304) are provided with a locking hole (306) that matches the fixing rod (303).

3. The presser foot device of an embroidery machine according to claim 2, characterized in that: The surface of the turntable (302) is provided with anti-slip threads, and the number of anti-slip threads is not less than fifteen.

4. The presser foot device of an embroidery machine according to claim 1, characterized in that: Both sides of the electric push rod (701) are fixedly connected to the fixing frame (702), and the other end of the fixing frame (702) is fixedly connected to the placement groove (4).

5. The presser foot device of an embroidery machine according to claim 1, characterized in that: The top and bottom of the push rod (704) are fixedly connected to the push plate (703) and the positioning plate (707) by connecting blocks (705), and the two push rods (704) are arranged in a centrally symmetrical manner about the push plate (703).

6. The presser foot device of an embroidery machine according to claim 1, characterized in that: The presser foot body (1) has mounting plates (2) at both ends of its top, and the mounting plates (2) have mounting holes in their inner cavities.

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