A sewing head for a linked robot

Abstract

The application discloses a linkage type sewing head for a robot and belongs to the technical field of sewing heads. The linkage type sewing head for the robot comprises a connecting seat, a vertically arranged lifting rod is connected in the connecting seat, the lower end of the lifting rod penetrates through the lower end left part of the connecting seat and is fixedly installed with a needle seat, the lower end inside of the needle seat is connected with a needle rod which can be lifted up and down, the lower end of the needle seat is fixedly installed with a connecting rod, the lower end of the connecting rod is fixedly installed with a presser foot plate, a needle hole groove corresponding to the needle rod is formed in the top of the presser foot plate, two grooves are formed in the front and rear outer end walls of the presser foot plate, the lower part of the groove is of an open structure, a rotating rod is rotatably connected in each groove, and the ends, away from the presser foot plate, of the two rotating rods located on the same side are fixedly installed with a smoothing block.

Description

Technical Field

[0001] This invention relates to the field of sewing head technology, and more specifically, to a sewing head for a linkage robot. Background Technology

[0002] A sewing machine is a machine that uses one or more sewing threads to form one or more stitches on fabric to sew one or more layers of fabric together. According to the driving method, it can be divided into hand-cranked, foot-pedal, and electric sewing machines. According to the stitches it sews, it can be divided into imitation hand-sewing stitches, lockstitches, single-thread chain stitches, double-thread or multi-thread chain stitches, single-thread or multi-thread overlock chain stitches, and multi-thread cover chain stitches. A sewing machine consists of four parts: the sewing head, the base, the transmission, and accessories. Nowadays, the sewing head is usually mounted on a linked robot to speed up the sewing process.

[0003] When the robot operates the sewing head, it directly controls the presser foot on the sewing head to move down and press and fix the fabric. However, it is necessary to use other equipment to press and smooth the fabric beforehand. This not only increases the working cost but also affects the working efficiency. If sewing is carried out when the fabric is full of wrinkles, it is easy to cause the lines to become messy. Summary of the Invention

[0004] 1. Technical problems to be solved

[0005] In view of the problems existing in the prior art, the purpose of this invention is to provide a linkage robot sewing head that can smooth out the wrinkles in the fabric and, through the flow of steam, guide the steam to the lower part of the presser foot plate under multiple grooves to iron the fabric below, making it smoother and thus facilitating sewing and effectively reducing the disorder of the lines.

[0006] 2. Technical Solution

[0007] To solve the above problems, the present invention adopts the following technical solution.

[0008] A sewing head for a linkage robot includes a connecting base, characterized in that: a vertically arranged lifting rod is connected inside the connecting base, the lower end of the lifting rod passes through the lower left part of the connecting base and is fixedly installed with a needle holder, a needle bar that can be raised and lowered is connected inside the lower end of the needle holder, a connecting rod is fixedly installed at the lower end of the needle holder, and a presser foot plate is fixedly installed at the lower end of the connecting rod. The top of the presser foot plate has a needle hole groove corresponding to the position of the needle bar. Two grooves are opened on the front and rear outer walls of the presser foot plate, and the lower part of the groove has an open structure. A rotating rod is rotatably connected inside each groove. A smoothing block is fixedly installed at the end of the two rotating rods on the same side away from the presser foot plate. A water inlet pipe is fixedly installed in the middle of the left end of the presser foot plate. During the downward movement of the presser foot plate, it cooperates with the sewing material to squeeze the smoothing block, causing the rotating rod to rotate, thereby moving the smoothing block to the outside of the presser foot plate, and simultaneously squeezing and smoothing the sewing material during the movement.

[0009] Furthermore, the lifting rod is slidably connected inside the connecting seat. A rack is fixedly installed from top to bottom on the outer wall of the back of the lifting rod. A second motor is fixedly installed inside the connecting seat. A gear that meshes with the rack is fixedly installed on the drive shaft of the second motor. The second motor controls the needle and presser foot to move down to sew the fabric through the gear and the rack on the lifting rod.

[0010] Furthermore, the left and right ends and the lower end of the smoothing block, away from the rotating rod, are all designed with inwardly curved smooth surfaces to prevent unnecessary wear on the seam material during the smoothing block's movement and flattening process.

[0011] Furthermore, an elastic telescopic rod is connected between the rotating rod and the groove. The upper and lower ends of the elastic telescopic rod are rotatably connected to the inner top wall of the groove and the outer end wall of the rotating rod, respectively. In its natural state, the rotating rod is tilted under the action of the elastic telescopic rod, which makes it easy for the smoothing block to move to the outside of the pressure foot plate as the rotating rod rotates.

[0012] Furthermore, the presser foot plate has a liquid storage tank inside that is fixedly connected to the water inlet pipe. An electric heating tube is fixedly installed inside the liquid storage tank, and the liquid storage tank is filled with water. There are two first connecting grooves inside the presser foot plate on the front and rear inner side walls of the liquid storage tank. Each first connecting groove has a first vent hole that penetrates the lower end of the presser foot plate on its bottom wall. Steam flows to the lower side of the presser foot plate through the first connecting groove and the first vent hole, thereby ironing the seam below the presser foot plate.

[0013] Furthermore, several second exhaust holes are provided on both the front and rear sides of the bottom of the presser foot plate. The first exhaust hole and several second exhaust holes on the same side are arranged side by side. Several second exhaust holes and two second exhaust holes are connected by a second connecting groove. When the steam flows in the first exhaust hole, it is diverted by the second connecting groove and then discharged through the second exhaust hole, thereby expanding the ironing area of ​​the steam.

[0014] Furthermore, a movable plate is slidably connected inside the first connecting groove. The end of the movable plate away from the first connecting groove extends into the interior of the groove and is rotatably connected to a rotating plate. The end of the rotating plate away from the movable plate is rotatably connected to the outer end wall of the rotating rod. The lower part of the rotating plate is inclined towards the inside of the groove in its natural state, so that the rotating plate can rotate towards the inside of the groove as the rotating rod rotates, thereby pulling the movable plate out of the first connecting groove.

[0015] Furthermore, the top wall of the liquid storage tank is provided with an L-shaped vent hole that penetrates the outer end wall of the pressure foot plate. A pressure relief valve is fixedly installed inside the L-shaped vent hole. When the pressure inside the liquid storage tank is too high, the excess steam can be discharged through the pressure relief valve.

[0016] Furthermore, the side of the L-shaped vent furthest from the liquid storage tank is located at the rear of the pressure foot plate. An inclined plate is fixedly installed at the upper rear of the pressure foot plate, and the inclined plate is located directly above the L-shaped vent. This means that excess steam in the liquid storage tank is discharged from the side of the pressure foot plate and then flows elsewhere under the guidance of the inclined plate, thereby preventing steam from rushing into the equipment and causing oxidation and corrosion.

[0017] Furthermore, the inclined plate has a cavity inside, which is filled with a desiccant. The inner rear wall of the cavity has several through holes that penetrate its outer end wall. When steam rises to the inclined plate, some of it will be absorbed by the desiccant inside, preventing the steam from condensing into water droplets on the inclined plate and then sliding down onto the fabric and wetting it.

[0018] 3. Beneficial effects

[0019] Compared with the prior art, the advantages of this invention are:

[0020] (1) This solution sets the rotating rod inside the groove, so that the smoothing block moves to the outside of the presser foot as the rotating rod rotates. During the movement, the block presses the fabric, smooths the wrinkles on the fabric, makes sewing smoother, avoids messy lines, and effectively reduces the occurrence of defective products.

[0021] (2) By setting an elastic telescopic rod between the rotating rod and the groove, after the presser foot plate moves up away from the sewing material, the rotating rod and the smoothing block immediately return to their initial tilted state, which facilitates quick sewing of different sewing materials and effectively improves work efficiency.

[0022] (3) By setting an electric heating tube, water and an L-shaped vent in the liquid storage tank, and setting a pressure relief valve inside the L-shaped vent, excess steam in the liquid storage tank can be discharged from the side of the pressure foot plate through the L-shaped vent after the work is completed, so as to avoid excessive internal pressure and allow the electric heating tube to continue to operate normally.

[0023] (4) By placing the inclined plate above the L-shaped vent, the steam flow is guided so that the steam cannot directly rise into the equipment, thus effectively protecting the equipment.

[0024] (5) By filling the inside of the inclined plate with desiccant, the desiccant adsorbs some of the steam, preventing the steam from condensing into water droplets on the inclined plate and then sliding onto the sewing material, effectively reducing external interference during sewing.

[0025] (6) By setting a first connecting groove, a first vent hole, a second connecting groove and a second vent hole inside the presser foot plate, the steam flow is guided to the lower part of the presser foot plate to iron the fabric on the lower side, making the fabric smoother and easier to sew, thus effectively reducing the occurrence of messy lines.

[0026] (7) By setting an inclined rotating plate and a moving plate on the rotating rod, the lower part of the rotating plate moves towards the inside of the groove as the rotating rod rotates, thereby driving the moving plate to move horizontally, opening the first connecting groove and the second exhaust hole, releasing steam away, thereby effectively controlling the flow of steam. Attached Figure Description

[0027] Figure 1 This is a perspective view of the present invention;

[0028] Figure 2 This is a side view of the present invention;

[0029] Figure 3 This is a schematic diagram of the connection structure of the rotating rod, smoothing block, elastic telescopic rod and rotating plate of the present invention.

[0030] Figure 4 for Figure 3 Working status diagram;

[0031] Figure 5 This is a sectional view of the pressure foot plate;

[0032] Figure 6 for Figure 5 Enlarged view of point A;

[0033] Figure 7 This is a bottom view of the pressure foot plate of the present invention;

[0034] Figure 8 This is a schematic diagram showing the depth section of the presser foot plate;

[0035] Figure 9 This is a front view of the presser foot plate;

[0036] Figure 10 This is a schematic diagram of the connection structure between the pressure foot plate and the tilting plate.

[0037] Explanation of the labels in the diagram:

[0038] 1. Connecting seat; 11. No. 2 motor; 12. Gear; 2. Lifting rod; 3. Needle seat; 4. Connecting rod; 5. Presser foot plate; 51. Needle hole groove; 52. Water inlet pipe; 53. L-shaped vent hole; 54. Groove; 541. First connecting groove; 55. First vent hole; 56. Second vent hole; 57. Liquid storage tank; 58. Electric heating tube; 59. Second connecting groove; 6. Needle rod; 7. Rotating rod; 71. Smoothing block; 73. Elastic telescopic rod; 75. Rotating plate; 76. Moving plate; 8. Inclined plate; 81. Through hole. Detailed Implementation

[0039] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0040] In the description of this invention, it should be noted that the terms "upper," "lower," "inner," "outer," "top / bottom," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0041] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "sleeved / connected," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0042] Example 1:

[0043] Please see Figure 1-10A linkage robot sewing head includes a connecting base 1. A vertically arranged lifting rod 2 is connected inside the connecting base 1. The lifting rod 2 is slidably connected inside the connecting base 1. A rack is fixedly installed from top to bottom on the outer wall of the back of the lifting rod 2. A second motor 11 is fixedly installed inside the connecting base 1. A gear 12 that meshes with the rack is fixedly installed on the drive shaft of the second motor 11. The meshing transmission between the gear 12 and the rack controls the downward movement of the needle and presser foot 5 to sew the fabric. The lower end of the lifting rod 2 passes through the lower left part of the connecting base 1 and is fixedly installed with a needle holder 3. The lower end of the needle holder 3 is connected to a needle bar 6 that can move up and down. The needle is installed on the needle bar 6, so that the needle moves up and down with the needle bar 6 to sew the fabric. A connecting rod 4 is fixedly installed at the lower end of the needle holder 3. The length of the connecting rod 4 is greater than the length of the needle bar 6. A presser foot 5 is fixedly installed at the lower end of the connecting rod 4.

[0044] Please see Figure 8-10 The presser foot 5 has a needle hole groove 51 at the top corresponding to the needle bar 6, which facilitates the needle to pass through the needle hole groove 51 to sew the fabric. An inclined plate 8 is fixedly installed at the upper rear of the presser foot 5 to guide the steam sprayed from the L-shaped vent 53 to another place, so as to prevent the steam from directly rushing into the equipment and causing oxidation and corrosion. The inclined plate 8 has a cavity inside, which is filled with desiccant. Several through holes 81 penetrating the outer end wall are opened on the rear inner wall of the cavity. When the steam rises to the inclined plate 8, some of it will be absorbed by the desiccant inside, so as to prevent the steam from condensing into water droplets on the inclined plate 8 and then sliding down onto the fabric and wetting it.

[0045] Please see Figure 3-4 Two grooves 54 are provided on the front and rear outer end walls of the presser foot 5, and the lower part of the groove is an open structure. A rotating rod 7 is rotatably connected inside each groove 54. An elastic telescopic rod 73 is connected between the rotating rod 7 and the groove 54. The upper and lower ends of the elastic telescopic rod 73 are rotatably connected to the inner top wall of the groove 54 and the outer end wall of the rotating rod 7, respectively. In the natural state, the rotating rod 7 is in an inclined state under the action of the elastic telescopic rod 73, which facilitates the smoothing block 71 to move to the outside of the presser foot 5 as the smoothing block 71 enters the groove 54. The smoothing block 71 is fixedly installed on the ends of the two rotating rods 7 on the same side away from the presser foot 5. The left and right ends and the lower side away from the rotating rod 7 of the smoothing block 71 are all set as smooth curved surfaces that curve inward to avoid wear on the sewing material. A water inlet pipe 52 is fixedly installed in the middle of the left end of the presser foot 5 to facilitate the replenishment of water into the liquid storage tank 57, so that the presser foot 5 can continuously iron the sewing material.

[0046] Please see Figure 5-7The presser foot plate 5 has a liquid storage tank 57 inside, which is fixedly connected to the water inlet pipe 52. An electric heating tube 58 is fixedly installed inside the liquid storage tank 57. The liquid storage tank 57 is filled with water. The electric heating tube 58 heats and evaporates the water, allowing the hot steam to pass through the first vent 55 and the second vent 56 to iron the sewing material, making the material smooth and easier to sew. The front and rear inner side walls of the liquid storage tank 57 are connected to two first connecting grooves 541 opened inside the presser foot plate 5. The bottom wall of each first connecting groove 541 has a first vent 55 that penetrates the lower end of the presser foot plate 5. Steam in the groove 57 is guided into the first exhaust hole 55 through the first connecting groove 541, and then sprayed out from the lower end of the presser foot 5 to iron the seam. Several second exhaust holes 56 are provided on both the front and rear sides of the bottom of the presser foot 5. The first exhaust hole 55 and several second exhaust holes 56 on the same side are arranged side by side. Several second exhaust holes 56 and two second exhaust holes 56 are connected by a second connecting groove 59. When the steam flows in the first exhaust hole 55, it is diverted by the second connecting groove 59 and then discharged through the second exhaust hole 56, thereby expanding the ironing area of ​​the steam.

[0047] Please see Figure 3-4 A movable plate 76 is slidably connected inside the first connecting groove 541 to facilitate sealing the second exhaust hole 56 and prevent excessive steam loss before ironing. The end of the movable plate 76 away from the first connecting groove 541 extends into the interior of the groove 54 and is rotatably connected to a rotating plate 75. The lower part of the rotating plate 75 is inclined towards the inside of the groove 54 in its natural state. The end of the rotating plate 75 away from the movable plate 76 is rotatably connected to the outer end wall of the rotating rod 7, so that the rotating plate 75 can rotate towards the inside of the groove 54 as the rotating rod 7 rotates, thereby pulling the movable plate 76 out of the first connecting groove 541.

[0048] Please see Figure 8-10 The top wall of the liquid storage tank 57 is provided with an L-shaped vent hole 53 that penetrates the outer end wall of the pressure foot plate 5. This allows excess steam in the liquid storage tank 57 to be discharged from the side of the pressure foot plate 5, preventing steam from rushing into the equipment. The side of the L-shaped vent hole 53 away from the liquid storage tank 57 is located at the rear of the pressure foot plate 5. The inclined plate 8 is located directly above the L-shaped vent hole 53, which facilitates the guidance of steam to other places. A pressure relief valve is fixedly installed inside the L-shaped vent hole 53. When the pressure inside the liquid storage tank 57 is too high, the excess steam can be discharged through the pressure relief valve.

[0049] Working principle: Motor 11 controls the lifting rod 2 to move downwards via gear 12 and rack, driving the needle holder 3 downwards, causing the presser foot 5 to flatten the fabric. During the downward movement of the presser foot 5, the smoothing block 71 first contacts the fabric, squeezing the elastic telescopic rod 73, causing the rotating rod 7 to flip upwards and enter the groove 54. This forces the smoothing block 71 to move outwards from the presser foot 5, smoothing the area to be sewn during the movement. Simultaneously, as the rotating rod 7 rotates, it pulls the rotating plate 75 inwards from the groove 54, forcing the moving plate... 76 moves towards the elastic telescopic rod 73, thereby opening the first connecting groove 541. Then, the water source in the liquid storage tank 57 is heated into steam by the electric heating tube 58, and flows to the sewing fabric through the first connecting groove 541 and the first exhaust hole 55 to iron it. When the steam flows in the first exhaust hole 55, a part of it is diverted by the second connecting groove 59, and then this part flows to the sewing fabric through the first exhaust hole 55, thereby expanding the ironing area, which can smooth out the wrinkles of the sewing fabric and make the sewing fabric smoother, thereby avoiding the lines from becoming messy during sewing and reducing defective products.

[0050] The above description is merely a preferred embodiment of the present invention; however, the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and its improved concepts, should be covered within the scope of protection of the present invention.

Claims

1. A sewing head for a linkage robot, comprising a connecting seat (1), characterized in that: The connecting seat (1) is internally connected to a vertically arranged lifting rod (2). The lower end of the lifting rod (2) passes through the lower left part of the connecting seat (1) and is fixedly installed with a needle seat (3). The lower end of the needle seat (3) is internally connected to a needle rod (6) that can be raised and lowered. The lower end of the needle seat (3) is fixedly installed with a connecting rod (4). The lower end of the connecting rod (4) is fixedly installed with a pressure foot plate (5). The top of the pressure foot plate (5) is provided with a needle hole groove (51) corresponding to the position of the needle rod (6). Two grooves (54) are opened on the front and rear outer walls of the pressure foot plate (5). The lower part of the groove (54) is an open structure. A rotating rod (7) is rotatably connected inside each groove (54). The two rotating rods (7) located on the same side are fixedly installed with a smoothing block (71) at the end away from the pressure foot plate (5). A water inlet pipe (52) is fixedly installed in the middle of the left end of the pressure foot plate (5). An elastic telescopic rod (73) is connected between the rotating rod (7) and the groove (54). The upper and lower ends of the elastic telescopic rod (73) are rotatably connected to the inner top wall of the groove (54) and the outer end wall of the rotating rod (7), respectively. The presser foot plate (5) has a liquid storage tank (57) that is fixedly connected to the water inlet pipe (52) inside. An electric heating tube (58) is fixedly installed inside the liquid storage tank (57). The liquid storage tank (57) is filled with water. There are two first connecting grooves (541) opened inside the presser foot plate (5) on the front and rear inner side walls of the liquid storage tank (57). Each first connecting groove (541) has a first vent hole (55) that penetrates the lower end of the presser foot plate (5) on its bottom wall. The pressure foot plate (5) has several second exhaust holes (56) on both the front and rear sides of its bottom. The first exhaust hole (55) and several second exhaust holes (56) on the same side are arranged side by side. Several second exhaust holes (56) and two second exhaust holes (56) are connected by a second connecting groove (59). A movable plate (76) is slidably connected inside the first connecting groove (541). The end of the movable plate (76) away from the first connecting groove (541) extends into the interior of the groove (54) and is rotatably connected to a rotating plate (75). The end of the rotating plate (75) away from the movable plate (76) is rotatably connected to the outer end wall of the rotating rod (7).

2. The sewing head for a linkage robot according to claim 1, characterized in that: The lifting rod (2) is slidably connected inside the connecting seat (1). A rack is fixedly installed on the outer wall of the back side of the lifting rod (2) from top to bottom. A second motor (11) is fixedly installed inside the connecting seat (1). A gear (12) that meshes with the rack is fixedly installed on the drive shaft of the second motor (11).

3. A sewing head for a linkage robot according to claim 1, characterized in that: The left and right ends and the lower end of the smoothing block (71) away from the rotating rod (7) are all designed as smooth curved surfaces that curve inward.

4. A sewing head for a linkage robot according to claim 1, characterized in that: The top wall of the liquid storage tank (57) is provided with an L-shaped vent hole (53) that penetrates the outer end wall of the pressure foot plate (5), and a pressure relief valve is fixedly installed inside the L-shaped vent hole (53).

5. A sewing head for a linkage robot according to claim 4, characterized in that: The side of the L-shaped vent (53) away from the liquid storage tank (57) is located at the rear of the pressure foot plate (5). An inclined plate (8) is fixedly installed at the upper rear of the pressure foot plate (5), and the inclined plate (8) is located directly above the L-shaped vent (53).

6. A sewing head for a linkage robot according to claim 5, characterized in that: The inclined plate (8) has a cavity inside, which is filled with a desiccant. The rear inner wall of the cavity has several through holes (81) that penetrate its outer end wall.

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