Embroidery material tensioning device and frame clamping mechanism

Abstract

The embodiment of the utility model discloses an embroidery material tensioning device and a frame clamping mechanism. The device disclosed by the embodiment of the utility model comprises a fixed seat mounted on an auxiliary gear and a driving mechanism mounted on a side frame of the tabouret. The driving mechanism comprises an air cylinder, an air cylinder shaft, a motor arranged on the outer side of the air cylinder and a motor shaft which penetrates through the air cylinder and can stretch out of the side, stretching out of the air cylinder, of the air cylinder shaft. The end, extending out of the cylinder, of the cylinder shaft is connected with the fixing base to drive the auxiliary gear to move relative to the side frame under driving of the cylinder. The motor shaft is used for limiting the maximum moving distance of the auxiliary baffle when the auxiliary baffle moves close to the side frame so as to tension the embroidery material when the motor shaft abuts against the fixing base. The mechanism provided by the embodiment of the utility model comprises an embroidery frame, an auxiliary gear and a plurality of embroidery material tensioning devices, according to the embodiment of the invention, the structure is simple, and stable tension force can be provided for embroidery materials.

Description

Technical Field

[0001] One or more embodiments of the present specification relate to the technical field of embroidery machines, and in particular to an embroidery material tensioning device and a clamping frame mechanism. Background Art

[0002] In a computerized embroidery machine, the frame clamping mechanism is primarily responsible for firmly securing the embroidery material to the embroidery area of ​​the frame and precisely moving it according to the programmed pattern during the embroidery process. This process ensures embroidery quality and efficiency. The frame clamping mechanism typically comprises an embroidery frame, a drawbar, a clamping device, a tensioning device, and a drive mechanism. These components work together to automatically clamp and tension the embroidery material, eliminating the need for manual intervention and significantly improving production efficiency and embroidery quality.

[0003] In some related technologies, the tensioning device utilizes a drive mechanism mounted on the side frame of the embroidery frame to push the auxiliary rail away from or toward the side frame. Because the movement of the auxiliary rail is driven by a telescopic rod on the drive mechanism, and a collar mounted on the telescopic rod that abuts the drive mechanism to mechanically limit the minimum distance between the side frame and the auxiliary rail, when the embroidery material is repeatedly stretched to a taut state, the collar will repeatedly collide with the drive mechanism. These collisions can loosen the screws securing the collar to the telescopic rod, affecting the stability of the telescopic rod and drive mechanism, and consequently, the tensioning effect. Utility Model Content

[0004] One or more embodiments of this specification describe an embroidery material tensioning device and a clamping frame mechanism.

[0005] In a first aspect, embodiments of the present disclosure provide an embroidery material tensioning device comprising a mounting base for mounting on a secondary frame and a drive mechanism for mounting on a side frame of an embroidery frame. The drive mechanism comprises a cylinder, a cylinder shaft, a motor disposed outside the cylinder, and a motor shaft extending through the cylinder and capable of extending from the side of the cylinder shaft extending from the cylinder. The end of the cylinder shaft extending from the cylinder is connected to the mounting base. The cylinder is configured to drive the mounting base to move the secondary frame inwardly toward the embroidery frame to gradually loosen the embroidery material held therein, or to move the secondary frame outwardly toward the frame to gradually tighten the material held therein. The end of the motor shaft extending from the cylinder is configured to abut against the mounting base. When the secondary frame moves outwardly toward the embroidery frame until the motor shaft abuts against the mounting base, the embroidery material is tensioned. The length of the motor shaft extending from the cylinder remains constant during the tensioning process.

[0006] In a second aspect, an embodiment of the present specification provides a clamping frame mechanism, comprising an embroidery frame, an auxiliary frame, and a plurality of embroidery material tensioning devices as mentioned in the first aspect.

[0007] The beneficial effects of the technical solutions provided by some embodiments of this specification include at least:

[0008] In one or more embodiments of the present specification, the embroidery material tensioning device of the present embodiment utilizes a pneumatic cylinder to drive the auxiliary gear relative to the side frame, so that the auxiliary gear gradually loosens the embroidery material as it moves away from the side frame, or gradually tightens the embroidery material as it approaches the side frame, and a motor is used to limit the final tension position. In this manner, the motor is used to achieve limited travel control for the tension required by different embroidery materials. Furthermore, the limited travel control and the auxiliary gear travel control are independently set to prevent the impact of limited travel collision on the auxiliary gear travel, thereby ensuring that the auxiliary gear movement has a stable driving force throughout the travel, thereby achieving stable tension.

[0009] In addition, the clamping frame mechanism of the embodiment of this specification utilizes multiple embroidery material tensioning devices and multiple unpowered guide devices that cooperate therewith to drive the auxiliary gear to move relative to the side frame, thereby achieving uniform tensioning of the embroidery material in the length direction. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] In order to more clearly illustrate the technical solutions in the embodiments of this specification, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of this specification. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0011] Figure 1 This is a schematic diagram of an exemplary structure of an embroidery material tensioning device provided in an embodiment of this specification, which is installed on an embroidery frame and an auxiliary frame;

[0012] Figure 2 This is a schematic diagram of an exemplary structure of an embroidery material tensioning device provided in an embodiment of this specification;

[0013] Figure 3 This is a schematic diagram of an exemplary structure of an embroidery material tensioning device provided in an embodiment of this specification, which is installed on an embroidery frame and an auxiliary frame;

[0014] Figure 4 This is a schematic diagram of an exemplary structure of a slider at the bottom of a mounting seat or a cylinder provided in an embodiment of this specification;

[0015] Figure 5 This is a schematic diagram of an exemplary structure of a clamping frame mechanism provided in an embodiment of this specification;

[0016] Figure 6 This is a schematic diagram of an exemplary structure of a clamping frame mechanism provided in an embodiment of this specification. DETAILED DESCRIPTION

[0017] The technical solutions in the embodiments of this specification will be described clearly and completely below in conjunction with the drawings in the embodiments of this specification.

[0018] Throughout this specification, the claims, and the accompanying drawings, the terms "first," "second," "third," and the like are used to distinguish between different items, not to describe a particular order. Furthermore, the terms "including," "having," and any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, product, or apparatus comprising a series of steps or elements is not limited to the listed steps or elements but may optionally include steps or elements not listed, or may include other steps or elements inherent to the process, method, product, or apparatus.

[0019] Typically, an embroidery machine uses an embroidery frame to hold the embroidery material. The frame also features a clamping device and / or a tightening device on its sides to hold the four edges of the embroidery material. These components work together to automatically tighten and / or tension the embroidery material.

[0020] In some related technologies, the tensioning device utilizes a drive mechanism mounted on the side frame of the embroidery frame to push the auxiliary rail toward or away from the side frame. The movement of the auxiliary rail is driven by a telescopic rod mounted on the drive mechanism, and a collar mounted on the telescopic rod, which abuts against the drive mechanism, mechanically limits the minimum distance between the side frame and the auxiliary rail. The collar is fixed to a specific position on the telescopic rod based on the required tensioning force of the embroidery material. The required tensioning force required to tension the embroidery frame varies depending on the material of the embroidery material. If the collar's fixed position on the telescopic rod is fixed, it cannot meet the tensioning requirements of various embroidery materials. If the collar's fixed position on the telescopic rod is adjustable, manual adjustment is typically required, which is inconvenient and subject to errors. Furthermore, to tension the embroidery material, the collar and the drive mechanism frequently collide with each other. These collisions can loosen the screws, preventing the collar from being effectively secured to the telescopic rod, and affecting the force applied to the telescopic rod. If two telescopic rods are used to drive the auxiliary rail, these collisions can cause a deviation in the force applied to the two rods, preventing uniform tensioning of the embroidery material. At the same time, the collision also affects the driving performance of the driving mechanism, making it unable to provide stable tensioning force.

[0021] Even if a power device is added to adjust the collar's position on the telescopic rod for ease of adjustment, the collar will repeatedly collide with the drive mechanism, affecting not only the performance of the motor that maintains the collar's position but also the stability of the drive mechanism. Furthermore, the tensioning device with the power device becomes complex and bulky, taking up considerable installation space.

[0022] Based on this, the embodiments of this specification propose an embroidery material tensioning device with a simple structure. It utilizes pneumatic control to move the auxiliary gear relative to the side frame, and electrically controls the auxiliary gear limit to adapt to the tension of different embroidery materials. Both the movement of the auxiliary gear and the adjustment of the auxiliary gear limit can be achieved through automated control. Furthermore, the limit control and the auxiliary gear movement control are independently configured to prevent the impact of limit collisions on the movement of the auxiliary gear. Even if the limit collisions occur multiple times, the performance of the motor controlling the limit will at most be affected. Only the motor and its related structures need to be replaced, without the need to replace the entire embroidery material tensioning device. This will also not affect the trajectory of the auxiliary gear's parallel movement relative to the side frame, thereby ensuring that the tensioning device can evenly tension the edge of the embroidery material.

[0023] Figure 1 A schematic diagram illustrates an exemplary structure 100 of an embroidery material tensioning device installed on an embroidery frame and auxiliary frame, according to an embodiment of this specification. This structure 100 includes an embroidery frame 102, which is a rectangular structure formed by four connected side frames. The longer side frames in the figure are the X-direction side frames, and the shorter side frames are the Y-direction side frames. This structure also includes auxiliary frames 104, which assist the embroidery frame 102 in compressing the embroidery material. These auxiliary frames 104 are located inside the X-direction side frames. There can be one or two auxiliary frames 104; if there are two, they can be located inside two opposing X-direction side frames. The auxiliary frames 104 and side frames on the same side are connected by an embroidery thread tensioning device 200. The tensioning device's drive mechanism is located on the side frame, and the tensioning device's fixed base is located on the auxiliary frame. The drive mechanism's pneumatic drive shaft is connected to the fixed base. When the pneumatic drive shaft retracts and contracts, it drives the fixed base and auxiliary frame together. When the pneumatic drive shaft extends toward the embroidery frame, the auxiliary stop 104 moves away from the side frame, loosening the tensioned embroidery material or returning it to its initial position to await new material loading. When the pneumatic drive shaft retracts toward the frame, the auxiliary stop 104 approaches the side frame, gradually tightening the embroidery material until it encounters a stopper on the drive mechanism. The auxiliary stop 104 then stops moving, leaving a predetermined distance between the auxiliary stop 104 and the side frame, and the embroidery material is tensioned in the X-axis. In this state, the tensioned material remains smooth, allowing the needle to be inserted accurately, resulting in high-quality embroidery. The length of the stopper is controlled by the motorized portion of the drive mechanism, which can be adjusted based on the desired tension of the embroidery material.

[0024] In addition, the structure 100 includes a guide device 108, which is disposed between the auxiliary rail 104 and the side frame on the same side. The guide device 108 cooperates with the embroidery thread tensioning device 200 to tension the embroidery material. The guide device 108 can be spaced apart from the embroidery thread tensioning device 200 on one side of the embroidery frame, so that the embroidery material is evenly tensioned in the X direction.

[0025] The structure 100 may also include a clamping mechanism 110, mounted on the auxiliary rail 108. This clamping mechanism 110 compresses the embroidery material perpendicularly to the material, clamping it naturally in the Y direction without initial tension. When multiple material tensioning devices pull the auxiliary rail to the same limit position, uniform material tension is ensured. In some examples, the clamping mechanism may also be mounted on the side frame. The thread tensioning device 200 tensions the embroidery material in the Y direction. When the embroidery material is placed on the embroidery frame 102, the clamping mechanism 110 presses the material against the frame 102 and the auxiliary rail 104. The drive mechanism of the thread tensioning device 200 drives the auxiliary rail 104 toward the side frame, gradually tensioning the material. When the limit position is reached, the material is tensioned.

[0026] In this way, the length of the blocking portion can be electrically adjusted according to the required tension of the embroidery material, making adjustment convenient and relatively accurate. Furthermore, while the blocking portion may collide with the movement of the auxiliary member, it does not interfere with the trajectory of the pneumatic drive shaft driving the auxiliary member toward the side frame. That is, the auxiliary member remains parallel to the side frame throughout its movement, ensuring that the embroidery material is evenly tensioned during the gradual tensioning process.

[0027] Figure 2 The following is a schematic diagram illustrating an exemplary structure of an embroidery material tensioning device 200 provided in an embodiment of this specification. The embroidery material tensioning device 200 includes a fixed base 231 and a drive mechanism. The drive mechanism includes a cylinder 201, a cylinder shaft 202, a motor 221, and a motor shaft 222. One end of the cylinder shaft 202 is located within the cylinder 201, while the other end extends out of the cylinder 201 and connects to the fixed base 231. In some examples, the cylinder shaft 202 and the fixed base 231 are secured by bolts. The cylinder 201 drives the cylinder shaft 202 to extend and retract, extending to the cylinder's maximum stroke and retracting to its minimum stroke. The maximum stroke is determined by the cylinder, while the minimum stroke is determined by a blocking portion on the drive mechanism. In some embodiments, the blocking portion may be a portion of the motor shaft extending outside the cylinder 201. One end of the motor shaft 222 is connected to the motor 221 located outside the cylinder 201, while the other end extends out of the cylinder 201 and contacts the fixed base 231. In some examples, the end surface of the motor shaft 222 may be used to contact the fixing seat 231 to achieve minimum stroke limitation.

[0028] Optionally, a motor 221 is disposed at the rear end of the cylinder 201, with one end of a motor shaft 222 connected to the motor 221 and the other end extending through and out of the cylinder 201. The motor shaft 222 and the cylinder shaft 2002 extend from the same side of the cylinder 201. In this way, the motor shaft 222 can limit the movement of the fixing seat 231 and the auxiliary gear in the direction of movement of the cylinder shaft.

[0029] In some embodiments, two cylinder shafts 202 may be provided, providing greater power to drive the fixed seat 231 and the auxiliary gear. To prevent the fixed seat from failing to effectively block due to the force generated by the motor shaft's collision with the fixed seat, such as when the fixed seat is subjected to uneven force during blocking, and the fixed seat 231 tilts at a certain angle relative to the cylinder 201, the motor shaft 222 needs to be positioned midway between the two cylinder shafts, with the motor shaft 22 acting on the midway between the fixed seat 231. This way, the fixed seat is subject to the blocking force at its center and the contraction force of the cylinder shaft on both sides, ensuring that the fixed seat does not deviate and that the auxiliary gear and the side frame remain relatively parallel at all times.

[0030] In some embodiments, the end of the cylinder shaft 202 may also be provided with an adjustment block 223. The adjustment block 223 is sleeved on the outside of the motor shaft 222, and the end of the motor shaft 222 sleeved on the adjustment block contacts the fixed seat 231 to achieve position limiting. In this way, the contact end surface is larger, which can increase the stability of the contact. In some examples, the adjustment block 223 can be a block structure, which is fixed to one end of the motor shaft by welding or screwing. In some examples, the adjustment block 223 can be a bolt, and one or more bolts are sleeved on one end of the motor shaft 222.

[0031] like Figure 2 As shown, the fixed seat 231 includes a fixed portion connected to the cylinder shaft 202 and a conflicting portion that conflicts with the motor shaft 222. In some embodiments, the fixed seat 231 includes a base 231-2 and a mounting portion 231-1, and the mounting portion 231-1 is a convex portion formed by protruding upward from the surface of the base 231-2. The fixed seat 231 is connected to the auxiliary gear through the base 231-2, and the fixed seat 231 is connected to the cylinder shaft 202 through the mounting portion 231-1. A blocking member 232 is also provided on the base 231-2, and the blocking member 232 is used to limit the auxiliary gear when it conflicts with the end face of the motor shaft 222. The blocking member 232 can be a blocking block or a blocking bolt, and the blocking member can be welded or screwed to the base 231-2. In addition, the number of mounting portions 231-1 can be set according to the number of cylinder shafts 202. When there are two cylinder shafts 202, two corresponding mounting portions 231-1 are provided. In this case, the blocking member 232 can be disposed on the base 231-2 between the two mounting portions 231-1. When the end face of the motor shaft 222 contacts the blocking member 232, the end face of the motor shaft 222 extends into the space between the two mounting portions. The two mounting portions prevent the end face of the motor shaft from deviating to either side. In some embodiments, the fixing base 231 can be a square block. The side of the fixing base 231 facing the cylinder 201 is used to contact the end face of the motor shaft 222. The cylinder shaft 202 penetrates the fixing base 231 and is fixed thereto.

[0032] In this way, the motor 221 is used to control the length of the portion of the motor shaft 222 extending outside the cylinder 201 to determine the minimum spacing between the auxiliary gear and the side frame, and further determine the tension required for different embroidery materials. The correspondence between the extended length of the motor shaft 222 and the tension is pre-selected and determined based on experience. After determining the type of embroidery material, the extended length of the motor shaft 222 can be automatically adjusted. In this way, the limit position of the minimum spacing can be accurately controlled. In addition, the parts that collide during the limiting process are the motor shaft 222 and the blocking member 232 on the fixed seat 231, and will not affect the cylinder 201 and the cylinder shaft 202. Even if there is a fault due to multiple collisions, only the motor shaft 222, the blocking member 232, and the motor 221 need to be replaced.

[0033] Figure 3 A schematic diagram illustrates an exemplary structure 300 of an embroidery material tensioning device mounted on an embroidery frame and auxiliary rail, as provided in an embodiment of this specification. The structure includes a side frame 231 of the embroidery frame, an auxiliary rail 104 located on the same side of the side frame 331, and an embroidery material tensioning device mounted between the side frame 331 and the auxiliary rail 104. The cylinder 201 of the embroidery material tensioning device can be mounted on the side frame 331 and can slide along a first chute 331-1 of the side frame 331. In some examples, a first slider 203 can be disposed at the bottom of the cylinder 201 and accommodated in the first chute 331-1. This allows the cylinder 201 to move in the X-direction within the first chute 331-1. The fixed base of the embroidery material tensioning device can be mounted on the auxiliary rail 104 and can slide along a second chute 104-1 of the auxiliary rail 104. In some examples, a second slider 223 can be disposed at the bottom of the fixed base and accommodated in the second chute 104-1. In this way, the fixed seat can move in the second chute 104-1 along the X direction. In application, the embroidery material tensioning device can be moved to a certain position along the X direction as needed to tension different positions of the embroidery material edge, and the number and position of the embroidery material tensioning device can be flexibly adjusted.

[0034] like Figure 3 As shown, the motor shaft 212 extends beyond the cylinder 201, with an adjustment block 213 positioned on the extended portion. The motor 211 controls the extension of the motor shaft 212 to a certain length. The end face of the motor shaft 212, which is fitted with the adjustment block 213, abuts against a stopper 223 on the fixed base, limiting the extension of the motor shaft 212 to the distance between the auxiliary gear 104 and the side frame 331. The fixed base includes a base 222 and a mounting portion 221. The cylinder shaft 202 is connected to the mounting portion 221, and the base 222 is mounted on the auxiliary gear 104. When the cylinder 201 drives the cylinder shaft 202 to extend or retract, it drives the mounting base and the auxiliary gear 104 to move.

[0035] Figure 4 The exemplary structural diagram of the slider 400 provided in the embodiment of this specification is shown. The slider 400 can be Figure 3 The first slider 203 provided at the bottom of the cylinder 201 may also be Figure 3 The second slider 223 is arranged at the bottom of the fixing seat. Figure 4 As shown, the slider 400 includes an upper fixing portion 401 and a lower clamping portion 402. The upper fixing portion 401 is provided with a threaded hole, and the upper fixing portion 401 is connected to the bottom of the mounting base or the bottom of the cylinder by the threaded hole and bolts. The lower clamping portion 402 is used to accommodate the first slide groove on the side frame or the second slide groove on the auxiliary gear. In order to prevent the driving mechanism from slipping out of the slide groove, the lower clamping portion 402 can be designed to have a structure with a length greater than the upper fixing portion 401. Accordingly, the slide groove is also set to a groove that matches the structure of the lower clamping portion 402 and the upper fixing portion 401. In some examples, the upper fixing portion 401 is a rectangular structure, and the lower clamping portion 402 is an inverted trapezoidal structure. The length of the upper fixing portion 401 is less than the length of the upper surface of the lower clamping portion 402. Accordingly, the slide groove is divided into a lower groove of an inverted trapezoidal structure and an upper groove of a rectangular structure. When the lower engaging portion 402 is inserted into the lower groove and the upper fixing portion 401 is accommodated in the upper groove, the slider 400 is not easily disengaged from the sliding groove, and the slider 400 can slide smoothly in the sliding groove.

[0036] Figure 5 The schematic diagram of an exemplary structure of a frame clamping mechanism 500 provided in an embodiment of this specification is shown. The frame clamping mechanism 500 includes an embroidery frame, an auxiliary rail 104, and multiple embroidery material tensioning devices (only a single embroidery material tensioning device is shown in the figure). The embroidery material tensioning device includes a cylinder 201 mounted on the side frame 331 and capable of sliding along a first slide groove 331-1 of the side frame 331. A fixed seat 231 of the embroidery material tensioning device is mounted on the auxiliary rail 104 and capable of sliding along a second slide groove 104-1 of the auxiliary rail 104. A cylinder shaft 202 extends from the cylinder 201 and connects to the fixed seat 231. A motor 211 of the embroidery material tensioning device is mounted behind the cylinder 201. A motor shaft 222 is connected to the motor 221 at one end and extends through the cylinder 201. This motor shaft 222 is configured to contact a stopper 232 on the fixed seat 221 when the fixed seat 231 moves toward the side frame 331, thereby limiting further movement of the fixed seat 231.

[0037] The clamping frame mechanism 500 also includes multiple guide devices (only one is shown in the figure). These guide devices include a connecting seat 571, a guide seat 551, and a guide shaft 561. The connecting seat 571 is mounted on the auxiliary rail 104 and can slide along the second slide groove 104-1 on the auxiliary rail 104. The guide seat 551 is mounted on the side frame 331 and can slide along the first slide groove 331-1 on the side frame 331. One end of the guide shaft 561 is fixedly connected to the guide seat 551, while the other end extends out of the guide seat 551 and connects to the connecting seat 571. When the auxiliary rail 104 is moved by the embroidery material tensioning device, the connecting seat 571 moves with it, causing the guide shaft 561 to expand and contract relative to the guide seat 551. In some embodiments, the guide seat 551 is designed to have the same specifications as the cylinder 201, and the connecting seat 571 is designed to have the same specifications as the fixed seat 231. The guide shaft 561 is designed to have the same specifications as the cylinder shaft 202. This allows the guide device to move with the material tensioning device, preventing the auxiliary rail 104 from being pulled too hard due to the smaller guide device, which would prevent it from keeping up with the movement of the material tensioning device. Because the side frame is long in the X-direction, to ensure uniform tensioning of the auxiliary rail along its entire length, multiple thread tensioning devices and guide devices are required on the side frame and auxiliary rail, with the thread tensioning devices and guide devices spaced apart. For example, a guide device may be placed between two adjacent thread tensioning devices. In some embodiments, the guide seat 551, connecting seat 571, and guide shaft 561 of the guide device may be designed to be smaller. Therefore, when multiple thread tensioning devices and guide devices are arranged on the side frame and auxiliary rail, multiple guide devices may be placed between two adjacent thread tensioning devices, allowing multiple sets of guide devices to be arranged on the side frame and auxiliary rail.

[0038] In some embodiments, the guide seat 551 and the connecting seat 571 are each provided with a slider at the bottom, which can be respectively accommodated in the first slide groove 331-1 and the second slide groove 104-1 and slide along the slide groove. Figure 4 The slider of the structure shown in the figure can flexibly adjust the number and position of the guide device by cooperating with the slider and the slot.

[0039] In some embodiments, the thread tensioning device may utilize two cylinder shafts, and accordingly, the guide device may utilize two guide shafts. This provides stable tensioning force for the movement of the auxiliary gear. In this manner, since the thread tensioning device utilizes two cylinder shafts 202 to drive the movement of the auxiliary gear 104, a small number of thread tensioning devices on the side frame 331 can propel the entire auxiliary gear 104. Furthermore, an unpowered guide device positioned between the thread tensioning devices coordinates with the movement of the auxiliary gear 104, ensuring that the entire auxiliary gear 104 remains parallel to the side frame 331. The maximum and minimum displacements of the guide device are determined by the thread tensioning devices on either side. When the cylinder shaft 202 extends to its maximum stroke, the guide device also reaches its maximum displacement and stops. When the cylinder shaft 202 retracts until the motor shaft 222 contacts the fixed base 231, the guide device also reaches its minimum position and stops. This prevents collisions and damage during movement of the guide device, requiring only a few thread tensioning devices for maintenance, resulting in low maintenance costs.

[0040] Figure 6 A schematic diagram of an exemplary structure of a frame clamping mechanism 600 provided in an embodiment of this specification is shown. The frame clamping mechanism 600 includes an embroidery frame, a secondary rail 104, multiple embroidery material tensioning devices (only a single embroidery material tensioning device is shown in the figure), multiple guide devices, and a cloth clamping mechanism 681. The cloth clamping mechanism 681 is mounted on the secondary rail 104, for example, secured to the secondary rail 104 by screws. The cloth clamping mechanism 681 is positioned closer to the frame than the embroidery material tensioning device. The cloth clamping mechanism 681 includes a clamping head and a clamping member 682. The clamping head is secured to the secondary rail 104. The end surface of the clamping member 682 that clamps the embroidery material is curved. Consequently, when the clamping mechanism 681 presses the clamping member 682 against the embroidery material and the embroidery material tensioning device gradually tensions the embroidery material, the embroidery material can pass through the curved end surface, gradually being tensioned and flattened.

[0041] In some embodiments, the clamping member 682 is connected to the cloth clamping mechanism via a spring. The clamping member is manually opened, and then the clamping member 682 compresses the embroidery material under the tightening action of the spring. In some embodiments, the cloth clamping mechanism 6 can be a cloth clamping mechanism for an embroidery machine disclosed in the applicant's prior application CN202410979624.6. The clamping mechanism 6 can be manually operated or driven by a clamping and holding component to resist the clamping and holding force of the clamping and holding component, thereby lifting the clamping member away from the embroidery material, or lowering the cloth clamping component to the lowest position to clamp the embroidery material. In addition, other cloth clamping mechanisms capable of clamping embroidery material are also applicable to this case.

[0042] The embodiments described above are merely preferred embodiments of this specification and are not intended to limit the scope of this specification. Without departing from the design spirit of this specification, various modifications and improvements made to the technical solutions of this specification by ordinary technicians in this field should fall within the scope of protection determined by the claims of this specification.

Claims

1. An embroidery material tensioning device, comprising a fixing seat for mounting on a secondary rail and a driving mechanism for mounting on a side frame of an embroidery frame; characterized in that: The driving mechanism includes a cylinder, a cylinder shaft, a motor arranged outside the cylinder, and a motor shaft that passes through the cylinder and can extend on the side where the cylinder shaft extends out of the cylinder; one end of the cylinder shaft extending out of the cylinder is connected to the fixed seat, and the cylinder is used to drive the fixed seat to drive the auxiliary gear to move toward the inside of the embroidery frame so that the embroidery material clamped by the auxiliary gear and the embroidery frame is gradually loosened, or to drive the auxiliary gear to move toward the outside of the embroidery frame so that the embroidery material clamped by the auxiliary gear and the embroidery frame is gradually tightened; one end of the motor shaft extending out of the cylinder is used to abut against the fixed seat, and when the auxiliary gear moves toward the outside of the embroidery frame until the motor shaft abuts against the fixed seat, the embroidery material is in a tensioned state, and the length of the motor shaft extending out of the cylinder remains unchanged during the tensioning process of the embroidery material.

2. The device according to claim 1, characterized in that There are two cylinder shafts and one motor shaft, and the motor shaft is arranged between the two cylinder shafts.

3. The device according to claim 1, characterized in that An adjusting block is provided at one end of the motor shaft extending out of the cylinder, and the adjusting block is used to abut against the fixing seat.

4. The device according to claim 1 or 2, characterized in that The fixing seat includes a base and a mounting portion protruding upward from the surface of the base; the mounting portion is connected to the cylinder shaft; a blocking member is provided on the base for abutting against the motor shaft.

5. The device according to claim 4, characterized in that The surface of the base protrudes upward to form two mounting parts, which are respectively connected to the two cylinder shafts; the blocking member is provided on the base between the two mounting parts for contacting with the motor shaft.

6. A frame clamping mechanism, characterized in that: The embroidery frame comprises an embroidery frame, an auxiliary frame, and a plurality of embroidery material tensioning devices according to any one of claims 1 to 5.

7. The mechanism according to claim 6, characterized in that The fixing seat is slidably connected to the auxiliary gear, and the cylinder is slidably connected to the side frame.

8. The mechanism according to claim 6, characterized in that It also includes a plurality of guide devices. The embroidery material tensioning device and the guide devices are arranged at intervals on the same side of the embroidery frame. The guide shafts of the guide devices extend and retract along with the cylinder shaft of the embroidery material tensioning device.

9. The mechanism according to claim 8, characterized in that The guide device includes a connecting seat installed on the auxiliary gear, a guide seat installed on the side frame, and the guide shaft; one end of the guide shaft is connected to the guide seat, and the other end extends out of the guide seat and is connected to the connecting seat, and the guide shaft can be extended and retracted relative to the guide seat.

10. The mechanism according to claim 6, characterized in that It also includes a cloth clamping mechanism arranged on the auxiliary gear, the cloth clamping mechanism is arranged close to the inside of the embroidery frame, and the embroidery material tensioning device is arranged close to the outside of the embroidery frame; the end surface of the cloth clamping mechanism clamping the embroidery material is an arc-shaped end surface.

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