Clamping device for embroidery

Abstract

The utility model provides a clamping device for embroidery, which belongs to the technical field of embroidery equipment and comprises a shell, the shell is fixedly arranged, the shell is provided with a first sliding groove, two clamping arms are arranged in the first sliding groove in a sliding mode, the clamping arms are movably connected with a locking mechanism in the shell, and the locking mechanism can lock and fix the clamping arms. Second sliding grooves are formed in the opposite inner sides of the clamping arms, supporting arms are arranged in the second sliding grooves in a sliding mode, and the supporting arms are movably connected with the clamping arms through electric telescopic rods. According to the clamping device, the supporting arms are arranged in the first sliding grooves in the sliding mode, the distance between the two supporting arms can be better adjusted, the supporting arms are locked when the size of the tabouret is met, the problem that the adjusting range of the clamping arms is limited is solved, the clamping device can adapt to more tabourets of different sizes, and the clamping device is convenient to use. The supporting arms are arranged on the opposite inner sides of the clamping arms in a sliding mode, the positions of the supporting arms can be adjusted according to the size of the tabouret, the tabouret is stressed more evenly, and the clamping effect is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of embroidery equipment, in particular to a clamping device for embroidery. Background Art

[0002] Embroidery is a traditional craft in the process of clothing production, which generally refers to various decorative patterns embroidered on fabrics with needles and threads. It is generally divided into two types: thread embroidery and feather embroidery. By using needles to shuttle and wind silk threads, yarns or other fibers on the embroidery cloth in a certain shape, pattern and color, a fabric decoration with beautiful patterns is finally formed. In modern industrial production, embroidery processes are generally completed by embroidery machines. By inputting preset patterns into the embroidery machine operating system, the embroidery machine controls the needles to embroider the embroidery cloth fixed on the operating table to meet production requirements. The embroidery machine can effectively improve the efficiency of embroidery production, improve product quality, and facilitate standardized control and implementation. However, during the operation of the embroidery machine, a fixing device is required to fix the embroidery frame so that the embroidery cloth remains taut, preventing the position of the embroidery cloth from shifting under the impact of the needles, which affects the final embroidery quality. The existing fixing devices have complex structures and generally require manual assistance for fixing, which affects production efficiency.

[0003] The Chinese utility model patent document with the literature number CN221371492U discloses an embroidery clamping device for clothing production, which is arranged on an adjusting bracket. A plurality of screw holes are provided on the adjusting plate, and the clamping arms are fixedly connected to the adjusting plate by screws. The distance between the two clamping arms is adjusted according to the size of the embroidery frame to adapt to different models and sizes of clothing fabrics and embroidery patterns. The clamping device includes two clamping arms, a clamping mechanism and an embroidery frame. One ends of the two clamping arms are respectively fixed on the adjusting bracket. An inner top plate is arranged on the inner side of the clamping arm, and a mounting plate is arranged on the outer side of the clamping arm. The clamping mechanism is arranged on the outer side wall of the clamping arm. The clamping mechanism includes an electric push rod, a right-angle connecting block, a transmission rod and a pressing plate. The electric push rod is fixed on the clamping arm. The right-angle connecting block is arranged at the end of the piston rod of the electric push rod. The right-angle connecting block is linked with the pressing plate through the transmission rod. The pressing plate is located inside the clamping arm. The side of the embroidery frame is arranged between the pressing plate and the inner top plate. A diamond-shaped slider is arranged below the right-angle connecting block, and a diamond-shaped sliding groove is arranged on the mounting plate. The diamond-shaped slider is arranged in the diamond-shaped sliding groove. The embroidery frame is sent to the designated clamping position by an automated gripper. When the electric push rod is started, the piston rod extends, pushing the right-angle connecting block forward. The diamond-shaped slider moves in the diamond-shaped sliding groove, restricting the movement direction of the right-angle connecting block. At this time, the transmission rod drives the pressing plate to approach the inner top plate, fixing the embroidery frame, which is convenient for embroidery operations. The existing technology adopts an embroidery clamping device for clothing production with the above structure. The embroidery frame is fixed by the clamping arms, and automatic clamping without manual assistance is safe and reliable, which is beneficial to improving production efficiency.

[0004] In the above structure, the clamping arm is fixed to the adjusting bracket through the cooperation of screws and screw holes. The clamping action is completed by the electric push rod pushing the right-angle connecting block forward. The diamond-shaped slider fixed below the right-angle connecting block is blocked by the diamond-shaped chute, driving the right-angle connecting block to deflect, and finally generating a lateral extrusion force. This results in the following problems with this device:

[0005] The distance between the two clamping arms is adjusted by fixing with screws and the adjusting plate, resulting in a fixed distance between the two clamping arms with a limited adjustment range. The clamping force between the two clamping arms is generated by the lateral extrusion force caused by the deflection of the right-angle connecting block. This force is a rigid stress and will change according to the increase in the displacement distance of the clamping end of the clamping arm, rather than a constant value. Therefore, when the size of the embroidery frame is between the adjustment values of the distances between two adjacent screws, especially when it is close to the latter half of the interval, the clamping may not be stable enough, and after long-term use, the clamping arm may also deform, resulting in a decline in the clamping effect. Utility Model Content

[0006] In view of the deficiencies in the prior art, the present utility model provides a clamping device for embroidery, which solves the problems of limited adjustment range of the clamping arm, insufficient stability in clamping, and decline in clamping effect existing in the prior art.

[0007] According to an embodiment of the present utility model, a clamping device for embroidery includes:

[0008] A housing, which is fixedly arranged. The housing is provided with a first sliding groove, and two clamping arms are slidably arranged in the first sliding groove. The clamping arms are provided with second sliding grooves on the inner sides facing each other;

[0009] A locking mechanism, which is movably connected to the clamping arm in the housing and can lock and fix the clamping arm;

[0010] A support arm, which is slidably arranged in the second sliding groove and is movably connected to the clamping arm through an electric telescopic rod.

[0011] Further, the clamping arm is provided with an engaging portion in the housing. The engaging portion is provided with engaging teeth. The locking mechanism includes a gear and a self-locking motor. The self-locking motor is fixedly arranged outside the housing. The gear is rotatably connected to the self-locking motor in the housing. The gear meshes with the engaging teeth. The two engaging portions are symmetrically arranged with respect to the gear and can move parallel to each other.

[0012] Further, the clamping arm in the housing further includes a moving portion and a connecting portion. The engaging portion, the connecting portion, and the moving portion are connected to form a U-shaped structure. The two U-shaped structures are arranged with their openings facing each other. The inner side of the moving portion is closely attached to the outer side of the engaging portion of the other clamping arm.

[0013] Furthermore, the thickness of the moving part is greater than that of the meshing part, and a through hole for the meshing part of another clamping arm to pass through is provided near the connecting part of the moving part.

[0014] Furthermore, a sliding block is provided at the bottom of the support arm, the sliding block is slidably arranged in the second sliding groove, and the sliding block is fixedly connected to the electric telescopic rod on one side close to the housing.

[0015] Even further, a groove is provided inside the support arm, a support plate is slidably arranged in the groove, and the support plate is connected to the support arm by a plurality of elastic members.

[0016] Even further, the support plate is vertically arranged, a horizontal support bottom plate is provided at the bottom of the support plate, and a limiting groove is provided at the support plate near the support bottom plate.

[0017] Even further, a vertical plate is provided at one end of the support plate away from the housing near the limiting groove, a rhombic telescopic frame is movably connected to the vertical plate, the rhombic telescopic frame is formed by pairwise rotational connection of a plurality of support bars and then end-to-end rotational splicing, the end points of the two support bars at one end of the rhombic telescopic frame coincide and are movably connected to the support plate, the middle parts of the two support bars at the other end are cross-rotationally connected, and parallel fixed clips are respectively fixedly connected to the upper and lower ends of the two end points.

[0018] Even further, a waist-shaped positioning hole is provided in the middle of the vertical plate, a pin is arranged in the positioning hole, and the pin is rotationally connected to the cross-connection point of the rhombic telescopic frame.

[0019] Even further, a position sensor is provided at the top end of the vertical plate.

[0020] Compared with the prior art, the utility model has the following beneficial effects:

[0021] 1. By slidably arranging the support arms in the first sliding grooves, the distance between the two support arms can be better adjusted, and the support arms are locked when the size of the embroidery frame is satisfied, solving the problem of limited adjustment range of the clamping arms, so that the clamping device can adapt to more different sizes of embroidery frames.

[0022] 2. By providing second sliding grooves on the opposite inner sides of the clamping arms and slidably arranging support arms, the support arms can adjust their own positions according to the size of the embroidery frame, making the force on the embroidery frame more uniform and improving the clamping effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the overall external structure of an embodiment of the utility model.

[0024] Figure 2Schematic diagram of the clamping arm structure according to an embodiment of the present utility model.

[0025] Figure 3 Schematic diagram of the back side of the internal structure according to an embodiment of the present utility model.

[0026] Figure 4 For Figure 3 Schematic diagram of the structure at position A in

[0027] Figure 5 For Figure 3 Schematic diagram of the structure at position B in

[0028] Figure 6 Schematic diagram of the support arm structure according to an embodiment of the present utility model.

[0029] Figure 7 Schematic diagram of another perspective of the support arm structure according to an embodiment of the present utility model.

[0030] In the above-mentioned drawings: 1, outer shell; 11, first sliding groove; 12, reinforcing rib; 13, base; 2, clamping arm; 21, engaging part; 211, engaging teeth; 22, moving part; 221, through hole; 23, connecting part; 24, clamping part; 241, second sliding groove; 242, electric telescopic rod; 3, gear; 31, rack; 4, self-locking motor; 41, motor rotating shaft; 5, support arm; 51, support plate; 511, support bottom plate; 512, limiting groove; 52, groove; 521, elastic member; 53, vertical plate; 531, position sensor; 532, positioning hole; 54, sliding block; 6, rhombic telescopic frame; 61, support bar; 62, fixed clamp; 63, pin; 7, embroidery frame. Detailed implementation manners

[0031] The technical solutions in the present utility model will be further described below with reference to the drawings and embodiments.

[0032] As Figure 1 shown, an embroidery clamping device according to an embodiment of the present utility model includes a fixedly arranged outer shell 1, the outer shell 1 is fixedly connected to the base 13, and a reinforcing rib 12 is also fixedly connected to the connection between the outer shell 1 and the base 13 to ensure the stability of the device. The outer shell 1 is horizontally provided with a first sliding groove 11, and two clamping arms 2 are slidably arranged in the first sliding groove 11, and the two clamping arms 2 can freely slide in the first sliding groove 11.

[0033] As Figure 1 , Figure 2 , Figure 3 and Figure 4As shown, the clamping arm 2 is movably connected with a locking mechanism inside the housing 1, and the locking mechanism can lock and fix the clamping arm 2. In this embodiment, preferably, the clamping arm 2 includes a clamping part 24 and an engaging part 21. One side of the engaging part 21 is covered with engaging teeth 211. The clamping part 24 and the engaging part 21 are arranged at a right angle. The locking mechanism includes a gear 3 and a self-locking motor 4. The self-locking motor 4 is fixed outside the housing 1, and the gear 3 is rotatably connected with the self-locking motor 4 inside the housing 1. As Figure 4 shown, the rack 31 of the gear 3 meshes with the engaging teeth 211 of the engaging part 21. The two engaging parts 21 are symmetrically arranged above and below the gear 3. Therefore, when the gear 3 rotates, the upper and lower engaging parts 21 will move parallel to each other in opposite directions, thereby driving the clamping part 24 to also move in the opposite direction to perform a clamping action. To further increase the stability of the engagement between the engaging part 21 and the gear 3, as Figure 2 shown, the clamping arm 2 further includes a moving part 22 and a connecting part 23. The engaging part 21, the connecting part 23, and the moving part 22 are connected to form a U-shaped structure. The openings of the two U-shaped structures are arranged opposite to each other, so that the engaging part 21 of one clamping arm 2 is located inside the opening of the other U-shaped structure, the moving part 22 is located outside the opening of the other U-shaped structure, and the inner side of one moving part 22 is in close contact with the outer side of the engaging part 21 of the other U-shaped structure. To enable the clamping arm 2 to have a larger moving space and ensure that it can adapt to more sizes of embroidery frames 7, preferably, the thickness of the moving part 22 is set to be greater than the thickness of the engaging part 21, and a through hole 221 for the engaging part 21 of the other clamping arm 2 to pass through is provided at the position where the moving part 22 is close to the connecting part 23, so that the engaging part 21 of the clamping arm 2 can continue to move after passing through the through hole 221 without being blocked by the moving part 22, further improving the adjustable range of the clamping arm 2.

[0034] As Figure 3 and Figure 5 shown, a second sliding groove 241 is arranged on the inner side of the clamping arm 2 facing each other. A support arm 5 is slidably arranged in the second sliding groove 241. The support arm 5 is movably connected with the clamping arm 2 through an electric telescopic rod 242. As Figure 6 shown, a sliding block 54 is arranged at the bottom of the support arm 5. The sliding block 54 is slidably arranged in the second sliding groove 241. An electric telescopic rod 242 is fixedly connected to the side of the sliding block 54 close to the housing 1. The electric telescopic rod 242 can drive the sliding block 54 to expand and contract in the second sliding groove 241, thereby driving the support arm 5 to move, so as to adjust its own position according to the size of the embroidery frame 7, make the embroidery frame 7 receive more uniform force, and improve the clamping effect.

[0035] As Figure 6As shown, a groove 52 is provided inside the support arm 5. The groove 52 is preferably rectangular. A support plate 51 is slidably arranged in the groove 52. The depth of the groove 52 is greater than the plate thickness of the support plate 51. The support plate 51 and the support arm 5 are connected by a plurality of elastic members 521. The elastic members 521 can be set as springs or reed pieces. In this embodiment, they are preferably springs, so as to prevent rigid extrusion during the clamping process, make the clamping force more uniform, and increase the clamping stability. No matter whether the elastic members 521 are in a compressed state or an unloaded state, the support plate 51 is always inside the groove 52. To further improve the clamping effect, the plate surface of the support plate 51 is set to be vertical, and a horizontal support bottom plate 511 is provided at the bottom of the support plate 51 for lifting the embroidery frame 7. A limiting groove 512 is provided near the support bottom plate 511 of the support plate 51. The width of the limiting groove 512 is slightly larger than the frame thickness of the embroidery frame 7 for clamping the embroidery frame 7.

[0036] The technical principle of the present utility model is as follows: When fixing the embroidery frame 7, the self-locking motor 4 is started to drive the clamping arms 2 in the first sliding groove 11 to move towards each other. After adjusting to a suitable position, according to the size and position of the embroidery frame 7, the position of the support arm 5 is adjusted by the electric telescopic rod 242. The embroidery frame 7 is placed on the support bottom plate 511, and then the self-locking motor 4 is started to drive the clamping arms 2 in the first sliding groove 11 to move towards each other. The embroidery frame 7 will be stuck into the limiting groove 512 on the support plate 51 and continue to push the support plate 51 to move into the groove 52 until it is tightened, and then the embroidery operation can be performed.

[0037] Since the self-locking motor 4 is used to drive the clamping arms 2 to slide and adjust in the first sliding groove 11, the distance between the two support arms 5 can be adjusted more accurately. The two requirements of adjustment and locking can be met simultaneously by the meshing and locking method, solving the problem of limited adjustment range of the clamping arms 2, so that the clamping device can adapt to more embroidery frames 7 of different sizes. At the same time, by providing a second sliding groove 241 on the inner side of the clamping arms 2 facing each other and slidably arranging the support arm 5, the support arm 5 can adjust its own position according to the size of the embroidery frame 7, making the force on the embroidery frame 7 more uniform and improving the clamping effect. Also, by the way that the support plate 51 uses the elastic members 521 to slide in the groove 52 of the support arm 5, the rigid contact between the device and the embroidery frame 7 is reduced. In the elastic compression contact, the embroidery frame 7 is more uniformly and stably stressed, avoiding damage to the embroidery frame 7 by the device and at the same time avoiding deformation of the clamping arms 2, increasing the service life of the device. Finally, by providing the support bottom plate 511 and the limiting groove 512, the stability and clamping effect of the embroidery frame 7 during the clamping process are greatly improved.

[0038] As Figure 5 、 Figure 6 and Figure 7, to further improve the stability of the clamping device and ensure the clamping effect, a vertical plate 53 is provided at one end of the support plate 51 away from the housing 1 near the limit groove 512. A clamping mechanism is further provided on the vertical plate 53. The clamping mechanism includes a diamond-shaped telescopic frame 6. The diamond-shaped telescopic frame 6 is movably arranged on the vertical plate 53. The diamond-shaped telescopic frame 6 is formed by pairwise rotational connection of a number of support bars 61 and then rotational splicing of the head and tail. The shape of the support bar 61 is preferably a waist-shaped long strip, and mounting holes are respectively provided at both ends and the middle position of the support bar 61. Two support bars 61 are rotationally connected to form a group, and the support bars 61 between groups are further rotationally connected to each other through the mounting holes at the endpoints. The two endpoints of the support bar 61 at one end of the diamond-shaped telescopic frame 6 coincide and are rotationally connected to the support plate 51 through a fixing pin. The middle parts of the support bars 61 at the other end are rotationally crossed and fixedly connected with upper and lower oppositely parallel fixing clips 62 respectively above and below the mounting holes at both endpoints. A waist-shaped positioning hole 532 is provided in the middle of the vertical plate 53. A pin 63 is arranged in the positioning hole 532. The pin 63 is rotationally connected to the cross-connection point of the diamond-shaped telescopic frame 6 to limit the diamond-shaped telescopic frame 6. The waist-shaped positioning hole 532 can allow the pin 63 to move a small distance in the hole, playing a buffering role. In order to be able to more accurately position the embroidery frame 7, a position sensor 531 is further provided at the top of the vertical plate 53. The position sensor 531 can sense the position of the embroidery frame 7, thereby instructing the electric telescopic rod 242 to adjust the position of the support arm 5, so that the fixing clip 62 can accurately lock and fix the frame of the embroidery frame 7.

[0039] When clamping the embroidery frame 7, the support plate 51 will move into the groove 52 under pressure, thereby driving one end of the diamond-shaped telescopic frame 6 to move. Also, due to the limiting effect of the pin 63 in the positioning hole 532, the diamond-shaped telescopic frame 6 will be stretched, and the fixing clips 62 at the tail end will approach each other with the deformation of the diamond-shaped telescopic frame 6, and finally the embroidery frame 7 will be further clamped.

[0040] Based on the above further improvement, since the diamond-shaped telescopic frame 6 is provided on the support arm 5, the diamond-shaped telescopic frame 6 can drive the fixed clamp 62 to further fix the embroidery frame 7, improving the stability of the clamping device; since the positioning hole 532 is set as a waist-shaped hole, the waist-shaped positioning hole 532 can allow the pin 63 to move a small distance in the hole, thus playing a good buffering role. When the support plate 51 is compressed, the pin 63 will first move to the lowest end of the positioning hole 532 due to the movement of the diamond-shaped telescopic frame 6 and is finally limited, causing the fixed clamps 62 at the tail end to approach each other with the deformation of the diamond-shaped telescopic frame 6 to achieve the clamping function. When the support plate 51 rebounds, the pin 63 will move upward in the positioning hole 532 to release the clamping of the fixed clamp 62, effectively avoiding damage to the diamond-shaped telescopic frame 6 when the pressure on the support plate 51 is too large and also avoiding damage to the fixed clamp 62 due to excessive force. By setting the position sensor 531, the position sensor 531 can locate the position of the border of the embroidery frame 7 and transmit the position signal to the control system of the embroidery device. The control system then transmits the control command to the electric telescopic rod 242, and the electric telescopic rod 242 adjusts the edge of the support arm 5 to align with the border of the embroidery frame 7 according to the position of the embroidery frame 7, enabling the clamping action to be more accurately achieved, completing the automatic control of the clamping device, and improving the clamping effect.

[0041] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present invention, and they should all be covered within the scope of the claims of the present invention.

Claims

1. A clamping device for embroidery, characterized in that: include: A housing (1), the housing (1) being fixedly arranged, the housing (1) being provided with a first sliding groove (11), two clamping arms (2) being slidably arranged in the first sliding groove (11), and a second sliding groove (241) being arranged on the inner side of the clamping arm (2); A locking mechanism, the locking mechanism being movably connected to the clamping arm (2) within the housing (1), and the locking mechanism being capable of locking and fixing the clamping arm (2); A support arm (5), wherein the support arm (5) is slidably disposed in the second sliding groove (241), and the support arm (5) is movably connected to the clamping arm (2) via an electric telescopic rod (242).

2. An embroidery clamping device as claimed in claim 1, characterized in that: The clamping arm (2) is provided with a meshing portion (21) inside the housing (1), and the meshing portion (21) is provided with meshing teeth (211). The locking mechanism comprises a gear (3) and a self-locking motor (4), and the self-locking motor (4) is fixedly arranged outside the housing (1). The gear (3) is rotatably connected to the self-locking motor (4) inside the housing (1), and the gear (3) meshes with the meshing teeth (211). The two meshing portions (21) are symmetrically arranged relative to the gear (3) and can move parallel to each other.

3. An embroidery clamping device as claimed in claim 2, characterized in that: The clamping arm (2) further comprises a moving portion (22) and a connecting portion (23) inside the housing (1); the meshing portion (21), the connecting portion (23) and the moving portion (22) are interconnected to form a U-shaped structure; two openings of the U-shaped structure are arranged opposite to each other; the inner side of the moving portion (22) is in close contact with the outer side of the meshing portion (21) of the other clamping arm (2).

4. An embroidery clamping device as claimed in claim 3, characterized in that: The thickness of the moving portion (22) is greater than the thickness of the meshing portion (21), and a through hole (221) for the meshing portion (21) of another clamping arm (2) to pass through is provided on the moving portion (22) near the connecting portion (23).

5. The embroidery clamping device according to claim 1, characterized in that: A sliding block (54) is provided at the bottom of the support arm (5), and the sliding block (54) is slidably arranged in the second sliding groove (241). The sliding block (54) is fixedly connected to the electric telescopic rod (242) at a side close to the housing (1).

6. The embroidery clamping device according to claim 1, characterized in that: A groove (52) is provided on the inner side of the support arm (5), a support plate (51) is slidably provided in the groove (52), and the support plate (51) is connected to the support arm (5) via a plurality of elastic members (521).

7. An embroidery clamping device as claimed in claim 6, characterized in that: The support plate (51) is arranged vertically, a horizontal support base plate (511) is arranged at the bottom of the support plate (51), and a limiting groove (512) is arranged on the support plate (51) near the support base plate (511).

8. An embroidery clamping device as claimed in claim 7, characterized in that: The support plate (51) is provided with a vertical plate (53) at one end away from the housing (1) and near the limiting groove (512); the vertical plate (53) is movably connected to a rhombus-shaped telescopic frame (6); the rhombus-shaped telescopic frame (6) is formed by a plurality of support bars (61) that are rotatably connected in pairs and then rotatably spliced ​​end to end; the end points of the two support bars (61) at one end of the rhombus-shaped telescopic frame (6) overlap and are movably connected to the support plate (51); the middle parts of the two support bars (61) at the other end are cross-rotatably connected, and the two end points are respectively fixedly connected to parallel fixing clips (62) at the upper and lower ends.

9. An embroidery clamping device as claimed in claim 8, characterized in that: A waist-shaped positioning hole (532) is provided in the middle of the vertical plate (53), a pin (63) is provided in the positioning hole (532), and the pin (63) is rotatably connected to the cross connection point of the diamond-shaped telescopic frame (6).

10. An embroidery clamping device as claimed in claim 8 or 9, characterized in that: A position sensor (531) is provided at the top end of the vertical plate (53).

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