Frame driving slide device with double track structure for embroidery machine

Abstract

The utility model discloses a frame drive slide device of double track structure for embroidery machine, including the slide of being used for connecting embroidery machine pressboard frame, slide cooperation connects the base, the base is equipped with at least two direction guiding device of guiding slide along linear track movement, and direction guiding device includes first direction guiding device and second direction guiding device, and first direction guiding device includes linear guide rail, and linear guide rail connects sliding block, and sliding block connects slide, and second direction guiding device includes circular bearing, and circular bearing outer wall cooperation and linear guide rail parallel track, and circular bearing center axle direction is equipped with connecting rod connection slide, the utility model discloses through the sliding block along linear guide rail movement and forms first direction guiding device, and circular bearing outer wall cooperation and linear guide rail parallel track and form second direction guiding device, and two direction guiding devices common effect improves the stability of embroidery machine pressboard frame.

Description

Technical Field

[0001] This application relates to the field of fabric clamping frame technology for embroidery machines, and more specifically, to a frame drive slide device and its components for a double-track structure used in embroidery machines. Background Technology

[0002] The fabric clamping frame of an embroidery machine, as a core component used for holding the fabric, directly affects the quality of the embroidery due to its motion stability. Currently popular single-head personal embroidery machines generally use a single motor to drive the sliding plate, which in turn moves the fabric clamping frame. This structure reveals significant technical flaws during high-speed operation. Because only a single guide structure is used between the sliding plate and the base, assembly gaps inevitably develop after long-term use, causing the sliding plate to wobble during high-speed reversals. This is especially problematic when handling large-sized embroidery pieces; as the embroidery width in the x-axis increases, the insufficient support on both sides of the sliding plate becomes more pronounced, easily leading to frame slippage. This unstable motion not only causes uneven stitches and pattern deformation but also accelerates the wear of mechanical parts, shortening the equipment's lifespan. Furthermore, the connection structure between the sliding plate and the base in existing technologies lacks effective rigid support, making it prone to deformation under large inertial forces, further exacerbating motion instability. Improving the sliding plate's motion accuracy and enhancing its structural rigidity are urgent technical challenges in this field. Existing technologies urgently need improvement to address these issues. Utility Model Content

[0003] The purpose of this application is to provide a frame-driven skateboard device with a double-track structure for embroidery machines, which has the advantages of improving the stability of skateboard movement, enhancing structural rigidity, and reducing high-speed reversing sway.

[0004] This application provides a double-track frame-driven slide plate device for an embroidery machine, including a slide plate for connecting the fabric clamping frame of the embroidery machine. The slide plate is connected to a base, and the base is provided with at least two motion direction guiding devices that guide the slide plate to move along a linear track. The motion direction guiding devices include a first motion direction guiding device and a second motion direction guiding device. The first motion direction guiding device includes a linear guide rail, which connects to a slider, and the slider connects to the slide plate. The second motion direction guiding device includes a circular bearing, the outer wall of which cooperates with a guide rail parallel to the linear guide rail. A connecting rod is axially provided at the center of the circular bearing to connect to the slide plate. This utility model, through the linear guide rail and the slider, forms the first motion direction guiding device relative to the slide plate by moving along the linear guide rail, while the outer wall of the circular bearing, in cooperation with the track parallel to the linear guide rail, forms the second motion direction guiding device relative to the slide plate. The double-track structure improves the motion stability of the slide plate, which in turn improves the stability of the fabric clamping frame of the embroidery machine.

[0005] Furthermore, this application also proposes a long strip profile structure with an L-shaped cross-section for the base, a first mounting groove and a second mounting groove parallel to each other at the bottom of the long strip profile structure, and a drive motor mounted on the side of the long strip profile structure.

[0006] Furthermore, this application also proposes that a linear guide rail be embedded in the first mounting groove, the upper surface of the linear guide rail be connected to the lower surface of the slider, and the upper surface of the slider be connected to the slide plate.

[0007] Furthermore, this application also proposes that the connection between the slide plate and the slider is provided with a recessed slider mounting groove, and the side of the slider mounting groove is provided with a weight reduction groove arranged along the axial direction of the slide plate.

[0008] Furthermore, this application also proposes that the second mounting groove includes a first groove wall and a second groove wall that are parallel to each other. The height of the first groove wall is higher than that of the second groove wall. The side of the first groove wall is provided with a horizontal support bar that is flush with the second groove wall. The horizontal support bar and the upper surface of the second groove wall share a clearance fit with the bottom surface of a circular bearing. The circular bearing is fitted with the first groove wall on one radial side and a linear guide rail on the other side. The linear guide rail and the first groove wall work together to form a guide rail.

[0009] Furthermore, this application proposes that the drive motor is connected to the driving pulley, the driving pulley is connected to the driven pulley via a belt, and the belt is connected to the slide plate via a clamping block. Furthermore, this application also proposes that a protective cover for connecting the base is provided on the outer side of the belt.

[0010] As can be seen from the above, the double-track frame drive slide device for embroidery machines provided in this application effectively disperses the force on the slide during movement and suppresses high-speed reversal sway by setting a first motion direction guide device and a second motion direction guide device of the double-track structure, combined with the synergistic effect of linear guide rail and circular bearing, thereby enhancing the support rigidity on both sides of the slide and improving the motion accuracy and stability of the fabric clamping frame of the embroidery machine. It has the advantages of reducing the deviation of embroidery stitches and extending the service life of the equipment. Attached Figure Description

[0011] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0012] Figure 1 This is a schematic diagram of the main structure of a double-track frame-driven sliding plate device for an embroidery machine according to the present invention;

[0013] Figure 2This is a schematic diagram of the exploded installation structure of a double-track frame-driven sliding plate device for an embroidery machine according to this utility model.

[0014] Figure 3 This is a three-dimensional structural diagram of the base in this utility model;

[0015] Figure 4 for Figure 3 Enlarged structural diagram at point A in the middle;

[0016] Figure 5 This is a three-dimensional structural diagram of the skateboard in this utility model;

[0017] Figure 6 This is a three-dimensional structural diagram of a double-track frame-driven sliding plate device for an embroidery machine after the drive motor has been installed.

[0018] Figure 7 This is a three-dimensional structural diagram of a double-track frame-driven sliding plate device for an embroidery machine after the drive motor is installed and the protective cover is removed. Detailed Implementation

[0019] 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 this 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.

[0020] In existing technologies, the drive slide of the fabric clamping frame of embroidery machines typically adopts a single-rail support structure, with a single linear guide rail bearing the entire load. As the embroidery width of embroidery machines increases and their operating speed rises, the problem of unbalanced support forces on both sides of the slide gradually becomes apparent.

[0021] To address these issues, researchers observed stress concentration in traditional monorail structures and attempted to add auxiliary supports to both sides of the slide plate. Initial trials used a dual linear guide rail scheme, but found that the installation precision requirements were too high and costs increased by 40%. Further research revealed that circular bearings possess self-aligning characteristics when subjected to radial loads, compensating for assembly errors. Finite element analysis showed that the combination of circular bearings and linear guide rails could reduce the deformation at the slide plate end to less than 0.1 mm, while keeping the manufacturing cost increase below 15%.

[0022] Therefore, this application proposes a double-track frame-driven sliding plate device for an embroidery machine, including a sliding plate 1 for connecting the fabric clamping frame of the embroidery machine. The sliding plate 1 is connected to a base 8. The base 8 is provided with at least two motion direction guiding devices that guide the sliding plate to move along a linear track. The motion direction guiding devices include a first motion direction guiding device and a second motion direction guiding device. The first motion direction guiding device includes a linear guide rail 5, which is connected to a slider 6, and the slider 6 is connected to the sliding plate 1. The second motion direction guiding device includes a circular bearing 2, the outer wall of which is fitted with a guide rail parallel to the linear guide rail. A connecting rod 29 is axially provided at the center of the circular bearing to connect to the sliding plate 1. The circular bearing is fixed to the sliding plate by the connecting rod, and the guide rail arranged parallel to the linear guide rail on its outer wall forms a motion constraint.

[0023] Preferably, a linear guide refers to a guide rail with linear guiding components. A guide rail refers to a rigid rail that mates with the outer wall of a circular bearing. A connecting rod refers to a rigid connecting component that transmits motion loads.

[0024] Specifically, the skateboard forms the main load-bearing path through the slider and linear guide rail. When the skateboard moves, the linear guide rail restricts vertical displacement, while the circular bearing counteracts lateral deflection torque through radial constraint. The two sets of guiding devices form a spatial force system, restricting the skateboard's freedom of movement to a single translational direction. Compared to existing technologies, traditional single-rail structures rely solely on the linear guide rail to bear composite loads, resulting in guide rail ball contact stress exceeding 1800 MPa. This solution distributes approximately 30% of the radial load through the circular bearing, reducing the guide rail contact stress to below 1200 MPa. The dual-rail structure exhibits a more balanced stiffness distribution. The self-lubricating properties of the circular bearing stabilize the friction coefficient, reducing driving force loss by approximately 40% compared to traditional sliders.

[0025] Through the above technical solution, this application effectively suppresses the lateral sway of the slide plate during high-speed movement, and controls the flatness deviation of the embroidery frame to within 0.1 mm. The synergistic effect of the dual tracks avoids resonance with the needle punching frequency of the embroidery machine.

[0026] This application further proposes a long strip profile structure with an L-shaped cross-section for the base 8. The bottom of the long strip profile structure is provided with a parallel first mounting groove 4 and a second mounting groove 3, and a drive motor 9 is installed on the side of the long strip profile structure.

[0027] The L-shaped elongated profile structure refers to a base made of a metal profile with a right-angle bend in cross-section, specifically made of extruded aluminum alloy or steel. The vertical and horizontal surfaces formed by the bend together constitute the support structure. The first and second mounting slots are grooves formed along the length of the profile at the bottom of the base, achieved through machining or profile pre-forming processes, used to accommodate the linear guide rail and circular bearing, respectively. Side mounting of the drive motor means the motor is fixed to the outside of the profile's vertical surface, specifically through bolt connections or snap-fit ​​structures, ensuring the motor output shaft is parallel to the length of the base.

[0028] Specifically, the base forms a stable support frame through the vertical and horizontal surfaces of the L-shaped profile. The first and second mounting slots are parallel to each other at the bottom of the base, used to fix the guide components of the linear guide rail and the circular bearing, respectively. After the drive motor is mounted on the side of the profile, its output shaft can be connected to the skateboard transmission mechanism via a synchronous belt or gears. Due to the parallel layout of the two mounting slots, the cooperation between the linear guide rail and the circular bearing restricts the skateboard's degree of freedom of movement in a single plane, while the rigid structure of the L-shaped profile can disperse the lateral loads generated during high-speed movement.

[0029] Compared with existing technologies, traditional skateboard bases often use single-groove or asymmetrical structures, resulting in insufficient installation precision of guide rails and bearings. This solution, however, uses a double-groove parallel design with an L-shaped profile to unify the positioning reference of the two motion direction guide devices. At the same time, the drive motor mounted on the side can avoid occupying bottom space and simplify the transmission path.

[0030] Through the above technical solution, this application solves the problem of skateboard wobbling caused by insufficient base support. By using L-shaped profiles and double mounting groove structure to enhance the rigidity of the base and ensure the parallelism of the two guide devices, the stability of the skateboard is improved and the risk of frame swinging is reduced when running at high speed is reduced.

[0031] This application further proposes to embed a linear guide rail 5 in the first mounting groove 4, with the upper surface of the linear guide rail 5 connected to the lower surface of the slider 6, and the upper surface of the slider 6 connected to the slide plate 1.

[0032] The first mounting groove refers to a recessed structure on the bottom of the base profile for fixing the linear guide rail. It can be achieved using an aluminum alloy profile extrusion molding process, with its width matching the dimensions of the linear guide rail. The guide rail is embedded and installed using mechanical locking or bolts. The linear guide rail is a linear motion component with a high-precision guiding surface. Its axial extension direction is consistent with the skateboard's movement direction, and the linear guidance function of the skateboard is achieved through the cooperation of the guide rail and the slider. The slider is a moving component that forms a sliding pair with the linear guide rail. It can be implemented using a slider assembly with a ball bearing circulation structure. Its lower surface forms a sliding interface with the upper surface of the guide rail through a planar contact method, and its upper surface is rigidly connected to the bottom of the skateboard using bolts or clips.

[0033] Specifically, the linear guide rail is fixed in the first mounting slot of the base via an embedded installation method. The upper surface of the guide rail and the lower surface of the slider form a sliding contact surface, and the top plane of the slider and the lower surface of the slide plate are rigidly fixed through a connector. When the drive mechanism moves the slide plate, the slider moves along the axial sliding trajectory of the linear guide rail. The double contact surface between the guide rail and the slider restricts the horizontal displacement of the slide plate, while the embedded installation structure enhances the torsional resistance between the guide rail and the base.

[0034] Compared to existing technologies, traditional skateboard drive mechanisms typically employ a single-sided guide rail or an open mounting structure, lacking rigid fixation between the guide rail and the base, which can easily lead to resonance or swaying during high-speed movement. This solution uses an embedded mounting method to completely embed the guide rail into the base profile, forming an integral load-bearing structure that effectively disperses lateral loads generated during movement.

[0035] Through the above technical solution, this application solves the problem of frame swing caused by insufficient rigidity of the skateboard's single-sided support. The embedded guide rail installation method improves the stability of the skateboard's motion trajectory, and the double contact surface structure reduces the cumulative error of the gap between the slider and the guide rail, thereby ensuring that the frame maintains horizontal synchronization accuracy during high-speed reciprocating motion.

[0036] This application further proposes that the connection between the slide plate 1 and the slider 6 is provided with a recessed slider mounting groove 19, and the side of the slider mounting groove 19 is provided with a weight reduction groove 7 arranged along the axial direction of the slide plate 1.

[0037] The slider mounting groove is a recessed structure on the bottom surface of the skateboard that matches the shape of the slider. It can be created by milling to form a rectangular groove. This structure increases the contact area between the skateboard and the slider, enhancing connection stability. The weight-reducing groove is a through-slot along the length of the skateboard, located on the side of the slider mounting groove. It can be created by wire cutting to form a U-shaped groove. This structure reduces the overall weight of the skateboard while maintaining axial bending stiffness.

[0038] Specifically, the skateboard is embedded in the slider via a milled mounting groove, transforming the contact surface between the skateboard and slider from planar to three-dimensional, effectively dispersing impact loads during movement. The weight-reducing groove extending along the skateboard's axial direction, with its U-shaped cross-section design, maintains the skateboard's longitudinal torsional resistance while removing excess material, preventing structural weakening due to weight reduction. This combined structure reduces motion inertia by optimizing mass distribution while ensuring the skateboard's rigidity.

[0039] Compared to existing technologies, traditional skateboards often use a planar bonding method to fix the slider, which leads to concentrated pressure on the contact surface, easily causing micro-deformation, and the overall weight is relatively large, resulting in significant start-stop inertia. This solution achieves uniform load transfer through embedded mounting slots, while axial weight-reducing slots reduce the mass of moving parts while maintaining structural integrity, forming a balanced design between rigidity and lightweight.

[0040] Through the above technical solution, this application effectively solves the problem of frame shaking caused by insufficient rigidity at the skateboard connection. The embedded mounting groove improves the connection stability, and the axial weight reduction groove reduces the motion inertia. The synergistic effect of the two can suppress the frame swing phenomenon generated during high-speed reversal, thereby improving the running accuracy of the embroidery machine and the quality of the embroidery.

[0041] This application further proposes a frame-driven sliding plate device with a double-track structure for an embroidery machine. The second mounting groove 3 includes a first groove wall 28 and a second groove wall 21 that are parallel to each other. The height of the first groove wall 28 is higher than that of the second groove wall 21. The side of the first groove wall 28 is provided with a horizontal support bar 23 that is flush with the second groove wall 21. The horizontal support bar 23 and the upper surface of the second groove wall 21 are in clearance fit with the bottom surface of the circular bearing 2. The circular bearing 2 is in radial fit with the first groove wall 28 on one side and with a linear guide rail 5 on the other side. The linear guide rail 5 and the first groove wall 28 work together to form a guide rail.

[0042] The first groove wall refers to the vertical wall surface located on one side of the second mounting groove. It can be formed using a metal profile and its height is designed to be higher than the second groove wall to provide axial restraint and constrain the radial displacement of the circular bearing. The second groove wall refers to the vertical wall surface located on the other side of the second mounting groove. It can be made of the same material as the first groove wall but with a lower height, and together with the horizontal support strip, it forms a support plane. The horizontal support strip is a horizontal protrusion extending along the side of the first groove wall. It can be achieved through welding or integral molding. Its function is to work with the upper surface of the second groove wall to support the bottom surface of the circular bearing, forming a stable contact surface and preventing the bearing from tilting during operation.

[0043] Specifically, the second mounting slot, through the parallel arrangement of the first and second slot walls, forms a stepped support structure in conjunction with the horizontal support bar. The bottom surface of the circular bearing is confined within the gap between the horizontal support bar and the upper surface of the second slot wall, with its radial sides contacting the first slot wall and the linear guide rail, respectively. The guide track formed between the linear guide rail and the first slot wall constrains the circumferential movement of the circular bearing, ensuring that the circular bearing can only roll along a preset straight trajectory when the slide plate moves, avoiding radial offset caused by the gap.

[0044] Through the above technical solution, this application effectively solves the problem of fabric frame swaying caused by insufficient support rigidity when the skateboard moves at high speed. The radial displacement of the circular bearing is doubly restricted by the first groove wall and the linear guide rail, and the clearance fit between the horizontal support bar and the second groove wall further disperses the force on the bearing, thereby reducing the swaying amplitude of the skateboard during large-amplitude movement in the x-direction and ensuring the stable operation of the fabric clamping frame.

[0045] This application further proposes that the drive motor 9 is connected to the drive pulley 12, the drive pulley 12 is connected to the driven pulley 14 via the belt 13, and the belt 13 is connected to the slide plate 1 via the clamping block 15.

[0046] The drive motor is a rotary drive device that provides power, which can be a stepper motor or a servo motor. Precise movement of the skateboard is achieved by controlling the motor's speed and direction. The driving pulley is a pulley structure connected to the output shaft of the drive motor, which can be made of aluminum alloy or steel, and is used to convert the motor's rotational motion into linear transmission via the belt. The belt is a flexible transmission component used to transmit power, which can be a synchronous belt or a toothed belt, and its toothed meshing prevents slippage. The driven pulley is a pulley structure that cooperates with the driving pulley, which can be made of the same material as the driving pulley, and is used to support the belt and maintain the tension of the transmission system. The clamping block is a connecting component used to fix the belt and the skateboard, which can be implemented by using metal clamps and bolts for locking. The clamping block directly transmits the linear motion of the belt to the skateboard.

[0047] Specifically, the drive motor drives the belt to circulate via the drive pulley, with the belt wound around the drive and driven pulleys at both ends to form a closed-loop transmission path. The clamping block is fixed at a specific position on the belt and rigidly connected to the slide plate via bolts. When the drive motor starts, the drive pulley moves the belt, and the clamping block moves synchronously with the belt, thus pulling the slide plate to translate along the linear guide rail. Because belt drive has flexible buffering characteristics, it effectively absorbs the impact vibration during motor start-up and shutdown. Simultaneously, the rigid connection of the clamping block ensures no relative displacement between the slide plate and the belt, avoiding transmission lag.

[0048] Through the above technical solution, this application achieves high precision and low vibration in the skateboard drive process, effectively suppressing skateboard wobbling caused by transmission gaps during high-speed movement, thereby avoiding misalignment defects in the embroidery caused by the swinging of the embroidery frame. The rigid connection between the clamping block and the belt simplifies the transmission structure and reduces assembly complexity. At the same time, the belt drive system has self-cleaning characteristics, reducing the need for daily maintenance.

[0049] This application further proposes a protective cover 10 with a connecting base 8 on the outside of the belt 13.

[0050] The protective cover refers to the shell structure that covers the belt drive components. It can be made of metal or plastic and is connected to the base via fasteners. Its function is to prevent foreign objects from entering the belt drive area, avoid interference from lint, oil, and other impurities, and reduce the impact of external collisions on the transmission system. The connecting base ensures a stable installation relationship between the protective cover and the base. This can be achieved through bolts, clips, or welding, ensuring the protective cover remains in a fixed position during equipment operation and preventing displacement due to vibration.

[0051] Through the above technical solution, this application solves the problem of unstable transmission caused by easy contamination of belt drive system, extends belt service life through the isolation effect of protective cover, ensures stable transmission of embroidery machine clamp frame during high-speed movement, thereby reducing embroidery frame shaking caused by belt abnormality.

[0052] 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. A double-track frame drive slide device for an embroidery machine, comprising a slide (1) for connecting the fabric clamping frame of the embroidery machine, the slide (1) cooperating with a connecting base (8), characterized in that: The base (8) is provided with at least two motion direction guiding devices for guiding the sliding plate to move along a straight track. The motion direction guiding devices include a first motion direction guiding device and a second motion direction guiding device. The first motion direction guiding device includes a linear guide rail (5), which is connected to a slider (6), and the slider (6) is connected to the sliding plate (1). The second motion direction guiding device includes a circular bearing (2), the outer wall of which is fitted with a guide rail parallel to the linear guide rail. A connecting rod (29) is provided axially at the center of the circular bearing to connect to the sliding plate (1). The base (8) has an L-shaped cross-section and a long strip profile structure. The bottom of the long strip profile structure is provided with a parallel first mounting device. The groove (4) and the second mounting groove (3) are long strip profile structures with drive motors (9) installed on the side. The second mounting groove (3) includes a first groove wall (28) and a second groove wall (21) that are parallel to each other. The height of the first groove wall (28) is higher than that of the second groove wall (21). The side of the first groove wall (28) is provided with a horizontal support bar (23) that is flush with the second groove wall (21). The horizontal support bar (23) and the upper surface of the second groove wall (21) are in clearance fit with the bottom surface of the circular bearing (2). The circular bearing (2) is in radial fit with the first groove wall (28) on one side and with a linear guide rail (5) on the other side. The linear guide rail (5) and the first groove wall (28) work together to form a guide rail.

2. The frame-driven sliding plate device with a double-track structure for an embroidery machine according to claim 1, characterized in that: The first mounting groove (4) is embedded in the mounting linear guide (5), the upper surface of the linear guide (5) is connected to the lower surface of the slider (6), and the upper surface of the slider (6) is connected to the slide plate (1).

3. The frame-driven sliding plate device with a double-track structure for an embroidery machine according to claim 1, characterized in that: The connection between the slide plate (1) and the slider (6) is provided with a recessed slider mounting groove (19), and the side of the slider mounting groove (19) is provided with a weight reduction groove (7) arranged along the axial direction of the slide plate (1).

4. The frame-driven sliding plate device with a double-track structure for an embroidery machine according to claim 1, characterized in that: The drive motor (9) is connected to the drive pulley (12), the drive pulley (12) is connected to the driven pulley (14) via the belt (13), and the belt (13) is connected to the slide plate (1) via the clamping block (15).

5. The frame-driven sliding plate device with a double-track structure for an embroidery machine according to claim 4, characterized in that: The outer side of the belt (13) is provided with a protective cover (10) for connecting the base (8).

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