Feeding upper pulling machine

Abstract

The utility model provides a feeding upper pulling machine, including: casing, needle bar mechanism, presser foot mechanism and feeding mechanism, the inside of casing is provided with rotatable main shaft to drive needle bar mechanism to do reciprocating motion, the presser foot mechanism is provided with presser foot drive source and can independently rotate presser foot wheel, in addition, the feeding mechanism is installed in the casing, and the feeding mechanism is installed in the casing. The feeding device comprises a driving shaft, a feeding shaft, a feeding driving source, a feeding wheel and a steering assembly, the driving shaft is transversely connected to the feeding driving source, the feeding shaft is longitudinally installed on the machine shell, the feeding driving source drives the driving shaft to transversely rotate, and the steering assembly drives the feeding wheel to rotate. The steering assembly can convert transverse rotation into longitudinal rotation so as to drive the feeding shaft and the feeding wheel to synchronously and longitudinally rotate, so that the needle bar mechanism, the presser foot mechanism and the feeding mechanism can independently operate, and then an internal mechanism of a conventional upper pulling machine can be effectively replaced; therefore, the space configuration of the needle rod mechanism and the feeding mechanism in the machine shell can be improved.

Description

Technical Field

[0001] This utility model relates to a sewing machine for sewing shoe (mid) soles, uppers or leather, and particularly to a lasting machine in which the needle bar mechanism, presser foot mechanism and feeding mechanism can operate independently, thereby the lasting machine of this utility model can effectively simplify the number of components inside the machine casing. Background Technology

[0002] The existing lasting machine is equipped with a pulley to drive the main shaft, which in turn drives the needle bar shaft and hook needle shaft to perform sewing operations. The main shaft also drives the feed wheel to rotate intermittently, allowing the feed wheel to feed material simultaneously during the sewing operations of the needle bar shaft and hook needle shaft. The presser foot wheel is pivotally connected to the bottom of the presser foot frame and is located on the outer periphery of the feed wheel. When sewing two layers of workpiece together, simply pull the presser foot frame outward and place the two layers of workpiece between the feed wheel and the presser foot wheel. The presser foot wheel rotates intermittently in sync with the feed wheel, allowing the user to hold both ends of the workpiece with both hands and push it in coordination with the speed of the feed wheel to complete the sewing operation.

[0003] Although existing lasting machines are widely used in the footwear industry, in order to ensure that the feed roller can rotate intermittently and synchronously during the sewing process of the needle bar shaft and hook needle shaft, existing lasting machines usually have a complex transmission mechanism between the main shaft and the feed roller. While the complex transmission mechanism allows the feed roller to rotate intermittently through the rotating main shaft, it also results in a large number of internal components, making it difficult to adjust the feed rate. This further complicates the overall structure of the existing lasting machine, and the parts are prone to wear, which also increases the difficulty of maintenance and repair. Utility Model Content

[0004] The main purpose of this utility model is to provide a feeding and stretching machine with an improved internal structure, so that the improved feeding and stretching machine can not only allow the needle bar mechanism, presser foot mechanism and feeding mechanism to operate independently, but also effectively reduce the number of components inside the feeding and stretching machine, thereby improving the space configuration of the needle bar mechanism and feeding mechanism inside the machine housing.

[0005] The secondary objective of this utility model is to provide a feeding and stretching machine with an improved presser wheel lifting mechanism that can drive the presser foot mechanism to move. The improved presser wheel lifting mechanism can effectively increase the power output of the lifting drive source while maintaining the existing volume of the lifting drive source. As a result, the improved presser wheel lifting mechanism can use a smaller volume lifting drive source to drive the presser foot mechanism to move, which helps to reduce the overall volume of the feeding and stretching machine to achieve the goal of equipment miniaturization.

[0006] Another objective of this invention is to provide a feeding and stretching machine in which, when the sector gear of the lifting transmission component swings through the lifting drive source to drive the presser foot mechanism to move, the presser foot mechanism can avoid being driven by the reciprocating sector gear and thus avoid swaying during linear movement, thereby improving the stability of the presser foot mechanism in linear movement.

[0007] To achieve the aforementioned objectives, this utility model provides a feeding and stretching machine, comprising: a housing, a needle bar mechanism, a presser foot mechanism, and a feeding mechanism;

[0008] The housing has a rotatable main shaft, and the needle bar mechanism has a needle bar connected to the main shaft and a needle connected to the needle bar. The needle bar can drive the needle to reciprocate through the rotating main shaft. The presser foot mechanism has a presser foot bracket mounted on the outside of the housing. The presser foot bracket is provided with a presser foot wheel located outside the housing and a presser foot drive source that can drive the presser foot wheel to rotate.

[0009] The feeding mechanism, connected to the housing, includes: a feeding drive source, a drive shaft, a feeding shaft, a feeding wheel, and a steering assembly. The feeding drive source is located inside the housing, and the drive shaft is connected to the feeding drive source via a transverse axis, allowing the drive shaft to rotate laterally. The feeding shaft is movably assembled to the housing via a longitudinal axis intersecting the transverse axis, allowing the feeding shaft to rotate longitudinally relative to the housing. The feeding wheel is connected to the feeding shaft and located on one side of the presser wheel. The steering assembly converts the transverse rotation into longitudinal rotation and is connected between the drive shaft and the feeding shaft, allowing the transversely rotating drive shaft to drive the feeding shaft and feeding wheel to rotate longitudinally synchronously via the steering assembly.

[0010] In this embodiment, the housing has a surrounding wall to form an installation space inside the housing. The installation space is provided with a transverse partition spaced apart from the bottom of the housing and a longitudinal partition space extending from the transverse partition space toward the bottom of the housing. The installation space is divided into a first installation area and a second installation area by the transverse partition space and the longitudinal partition space. The first installation area is used to accommodate the feeding drive source, and the second installation area is used to accommodate the needle bar.

[0011] The feeding and stretching machine further includes a support frame, which has a bearing portion connected to the longitudinal partition wall and the surrounding ring wall and a through portion that can penetrate into the first installation area. The bearing portion is adjacent to the feeding drive source to reduce the height space required by the feeding drive source device in the first installation area, and the through portion can be passed through by the drive shaft.

[0012] In addition, the drive shafts are spaced apart below the needle bar and arranged parallel to the needle bar, such that the feeding shaft is arranged perpendicular to the needle bar. The feeding and stretching machine further has a presser wheel lifting mechanism that can selectively move the presser wheel closer to or further away from the feeding wheel. The presser wheel lifting mechanism has a lifting drive source located inside the machine housing, a lifting shaft that can be driven by the lifting drive source to rotate, and a lifting transmission assembly that can change the rotational motion into linear motion. The lifting transmission assembly is disposed between the lifting shaft and a foot connecting rod connected to the presser foot frame, so that the lifting transmission assembly can drive the presser foot mechanism to move linearly through the rotating lifting shaft.

[0013] In this embodiment, the lifting transmission assembly has a gear connected to the lifting shaft, a sector gear pivotally connected to the housing, and a pressure foot base connected to the foot support connecting rod. The gear meshes with the sector gear, so that the gear can drive the sector gear to swing through the rotating lifting shaft. The sector gear is movably connected to the pressure foot base, so that the swinging of the sector gear can change the relative positional relationship between the sector gear and the pressure foot base.

[0014] The sector gear has a movable groove, and the presser foot base has a through block that can be inserted into the movable groove. The contour of the movable groove is larger than the contour of the through block, and it has a longitudinal section and a transverse section that intersects with the longitudinal section. When the sector gear swings, one end of the longitudinal section will approach the through block, while the other end of the longitudinal section will move away from the through block.

[0015] One end of the sector gear is provided with a pivot portion that is pivotally connected to the housing, and the other end is provided with a tooth portion that can mesh with the gear. The movable groove is formed between the pivot portion and the tooth portion, and a resistance arm is formed between the pivot portion and the movable groove. Then, a force-applying arm with a length greater than the resistance arm is formed between the pivot portion and the tooth portion.

[0016] Furthermore, the lifting transmission assembly further includes a guide assembly between the housing and the presser foot base. The guide assembly prevents the foot connecting rod from swinging during linear movement. The guide assembly has a guide seat connected inside the housing and a guide block connected to the presser foot base. The guide seat is recessed to form a guide rail, and two spaced-apart rail walls are formed inside the guide rail. Each side of the guide block has a body surface that penetrates into the guide rail, so that each body surface can contact one of the rail walls one by one.

[0017] The present invention is characterized by the needle bar mechanism being able to reciprocate via a rotating main shaft, the pressing mechanism having a presser foot drive source and an independently rotating presser foot wheel, and the feeding mechanism having five parts: a drive shaft, a feeding shaft, a feeding drive source, a feeding wheel, and a steering assembly. The drive shaft is laterally connected to the feeding drive source, while the feeding shaft is longitudinally mounted on the machine housing. The feeding drive source drives the drive shaft to rotate laterally, and the steering assembly converts the lateral rotation into longitudinal rotation, thereby driving the feeding shaft and the feeding wheel to rotate longitudinally synchronously. In this way, the needle bar mechanism, the presser foot mechanism, and the feeding mechanism can operate independently, thus effectively replacing the conventional internal mechanism of the forming machine. This improves the spatial configuration of the needle bar mechanism and the feeding mechanism within the machine housing, thereby relatively improving the operational efficiency and maintenance convenience of the feeding forming machine.

[0018] Furthermore, the lifting transmission assembly of the presser foot lifting mechanism includes a gear mounted on the lifting drive source, a oscillating sector gear, and a presser foot base mounted on the presser foot mechanism. The sector gear has a pivot portion that can pivotally connect to the machine housing and a tooth portion that meshes with the gear at both ends. A movable groove is formed between the pivot portion and the tooth portion of the sector gear to movably connect it to the presser foot base. The resistance arm length between the pivot portion and the movable groove is less than the application arm length between the pivot portion and the tooth portion. Therefore, when the lifting drive source drives the sector gear to oscillate, the lifting drive source can increase the force arm output through the sector gear's characteristic that the resistance arm is less than the application arm. This allows for the use of a smaller lifting drive source to drive the presser foot mechanism, which helps to reduce the overall size of the feeding and stretching machine to achieve the goal of equipment miniaturization.

[0019] Furthermore, a guide assembly is provided between the housing and the presser foot base. The guide assembly prevents the presser foot mechanism from swaying during linear movement. Thus, when the sector gear of the lifting transmission assembly swings through the lifting drive source to drive the presser foot mechanism to move, the presser foot mechanism can avoid being driven by the reciprocating sector gear and swaying during linear movement, thereby effectively improving the stability of the presser foot mechanism during linear movement. Attached Figure Description

[0020] Figure 1 This is a perspective view of the feeding and stretching machine of this utility model;

[0021] Figure 2 A schematic diagram showing the feeding mechanism, needle bar mechanism, hook needle mechanism, cutting mechanism, presser foot mechanism, and presser foot wheel lifting mechanism installed on the main body;

[0022] Figure 3 This is a control diagram of the feeding and stretching machine of this utility model;

[0023] Figure 4 This is a cross-sectional view of the feeding and stretching machine of this utility model;

[0024] Figure 5 This is a cross-sectional view from another perspective of the feeding and stretching machine of this utility model;

[0025] Figure 6 This is a decomposed diagram of the ontology;

[0026] Figure 7 An exploded view of the feeding mechanism installed on the main body;

[0027] Figure 8 This is an enlarged view of the hook mechanism and the cutter mechanism mounted on the main body.

[0028] Figure 9 A schematic diagram showing the presser foot mechanism and presser foot wheel lifting mechanism installed on the main body;

[0029] Figure 10 An exploded view of the presser foot lifting mechanism connected to the presser foot mechanism;

[0030] Figure 11A A schematic diagram showing how the presser wheel lifting mechanism moves the presser wheel away from the feed wheel;

[0031] Figure 11B A schematic diagram showing the release of the presser wheel near the feed wheel for the presser wheel lifting mechanism;

[0032] Figure 12 This is a diagram illustrating how to manually move the presser roller away from or closer to the feed roller;

[0033] Figure 13A A schematic diagram showing that the circumferential speed of the feed wheel is the same as that of the presser wheel.

[0034] Figure 13B A schematic diagram showing that the circumferential speed of the feed wheel is greater than that of the presser wheel;

[0035] Figure 13C A schematic diagram showing that the circumferential speed of the feed wheel is less than that of the presser wheel.

[0036] Explanation of reference numerals in the attached drawings: 1-Feeding and stretching machine; 10-Main body; 11-Machine casing; 111-Surrounding ring wall; 112-Installation space; 112a-First installation area; 112b-Second installation area; 113-Transverse partition wall; 114-Longitudinal partition wall; 115-Needle bar hole; 116-Hook needle hole; 117-Pressure foot shaft hole; 118-Shaft seat; 12-Top cover; 13-Power source; 14-Support frame; 141 - Supporting part; 142 - Insertion part; 15 - Main shaft; 20 - Feeding mechanism; 21 - Feeding drive source; 22 - Drive shaft; 23 - Feeding shaft; 24 - Feeding wheel; 25 - Steering assembly; 251 - Bevel gear; 30 - Needle bar mechanism; 31 - Needle; 32 - Needle bar; 40 - Hook needle mechanism; 41 - Hook needle bar; 42 - Hook needle; 50 - Cutting mechanism; 60 - Presser foot mechanism; 61 - Presser foot bracket; 62 - Leg connection Rod; 63-Presser wheel; 64-Presser wheel drive source; 70-Presser wheel lifting mechanism; 71-Lifting drive source; 72-Lifting shaft; 73-Lifting transmission assembly; 731-Gear; 732-Sector gear; 732a-Pivot joint; 732b-Gear; 732c-Modular groove; 732c1-Longitudinal section; 732c2-Transverse section; 733-Presser foot base; 733a-Through block; 733b-Connector Platform; 74-Guide assembly; 741-Guide seat; 741a-Guide track; 741b-Track wall; 742-Guide block; 742a-Block surface; 80-Control mechanism; 81-Power source controller; 82-Feeding wheel controller; 83-Pressure roller controller; 84-Pressure roller lifting controller; D1-Resistant arm; D2-Force arm; L1-Transverse axis; L2-Longitudinal axis; S-Sewing material. Detailed Implementation

[0037] The present invention will be further described below with reference to specific embodiments and accompanying drawings. The advantages and features of the present invention will become clearer with the description.

[0038] Please see Figure 1 , Figure 2 and Figure 3 As shown, this utility model provides a feeding and lasting machine 1, which is a sewing machine used to sew the insole of a shoe to the edge of the shoe upper. The feeding and lasting machine 1 is mainly composed of a body 10, a feeding mechanism 20, a needle bar mechanism 30, a hook needle mechanism 40, a cutting knife mechanism 50, a presser foot mechanism 60, a presser foot wheel lifting mechanism 70 and a control mechanism 80.

[0039] Please see Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6As shown, the main body 10 has four parts: a housing 11, a top cover 12, a power source 13, and a support frame 14. The housing 11 has a surrounding ring wall 111 to form an installation space 112 located inside the housing 11. The installation space 112 has a transversely arranged transverse partition 113 and a longitudinally arranged longitudinal partition 114. The transverse partition 113 is spaced at the bottom of the housing 11, and the longitudinal partition 114 extends from the transverse partition 113 toward the bottom of the housing 11. The installation space 112 is divided into a first installation area 112a and a second installation area 112b with a larger outline than the first installation area 112a by the transverse partition 113 and the longitudinal partition 114. As shown in the figure, the front of the housing 11 has a needle bar hole 115, a hook hole 116, a presser foot shaft hole 117, and a shaft seat 118. The needle bar hole 115, the hook hole 116, and the presser foot shaft are... All three holes 117 are connected to the second mounting area 112b of the mounting space 112, and the top cover 12 is assembled on the upper end of the housing 11. The active power source 13 is a servo motor that can generate rotational power. The active power source 13 is connected to a spindle 15 to directly drive the spindle 15 to rotate laterally. The spindle 15 passes through the second mounting area 112b of the housing 11, so that the spindle 15 can be assembled into a needle bar drive assembly (not shown) located inside the second mounting area 112b. In addition, the support frame 14 has a laterally arranged bearing part 141 and a longitudinally arranged through part 142. The bearing part 141 is formed at the lower end of the through part 142, so that the support frame 14 has an L-shaped appearance. A part of the bearing part 141 is connected to the surrounding ring wall 111 and the longitudinal partition wall 114, so that the through part 142 can pass into the interior of the first mounting area 112a.

[0040] Please see Figure 4 and Figure 7As shown, the feeding mechanism 20 is connected to the housing 11 of the main body 10. The feeding mechanism 20 mainly comprises five parts: a feeding drive source 21, a drive shaft 22, a feeding shaft 23, a feeding wheel 24, and a steering assembly 25. The feeding drive source 21 is a stepper motor capable of generating rotational power. The feeding drive source 21 is connected to the through portion 142 of the support frame 14, such that the feeding drive source 21 is located inside the first mounting area 112a of the mounting space 112. The feeding drive source 21 is adjacent to the support frame 14. The support portion 141 of the support frame 14 minimizes the required height space for the feeding drive source 21 within the first mounting area 112a. Furthermore, the drive shaft 22 passes through the through portion 142 of the support frame 14 with a horizontal transverse axis L1, and is connected to the feeding drive source 21, allowing it to rotate laterally within the first mounting area 112a. The feeding shaft 23 has a longitudinal axis L2 intersecting the transverse axis L1. The feed shaft 23 is movably mounted on the housing 11, allowing it to rotate longitudinally relative to the housing 11. A portion of the feed shaft 23 is located outside the body 10 and connected to a feed wheel 24 located outside the body 10, while the remaining portion is located inside the first mounting area 112a near the drive shaft 22. The steering assembly 25 is used to convert lateral rotation into longitudinal rotation, and the steering assembly 25 is connected between the drive shaft 22 and the feed shaft 23. Thus, when the feed drive... When the source 21 drives the drive shaft 22 to rotate laterally, the drive shaft 22, which rotates laterally, can drive the feeding shaft 23 and the feeding wheel 24 to rotate longitudinally synchronously through the steering assembly 25. In this embodiment, the steering assembly 25 is set as two meshing bevel gears 251, one bevel gear 251 is connected to the drive shaft 22, and the other bevel gear 251 is connected to the feeding shaft 23. However, the steering assembly 25 is set as two bevel gears 251 only for the purpose of illustration. That is, the steering assembly 25 can be set as a universal joint.

[0041] Please see Figure 1 , Figure 2 and Figure 4As shown, the needle bar mechanism 30 has a needle 31 and a needle bar 32. The needle 31 is located outside the mounting space 112 of the body 10, and the needle 31 is mounted on one end of the needle bar 32. The needle bar 32 passes through the needle bar hole 115 of the body 10 and enters the second mounting area 112b of the mounting space 112, so that the needle bar 32 is assembled to the needle bar drive assembly of the body 10. In this way, when the main power source 13 of the body 10 drives the main shaft 15 of the body 10 to rotate laterally, the needle bar drive assembly can simultaneously drive the needle bar 32 and the needle 31 to reciprocate for sewing operations through the laterally rotating main shaft 15. In this embodiment, the needle bars 32 are spaced apart above the drive shaft 22 of the feeding mechanism 20, and the needle bars 32 are arranged parallel to the drive shaft 22, so that the needle bars 32 are arranged perpendicularly to the feed shaft 23 of the feeding mechanism 20.

[0042] Please see Figure 1 , Figure 4 and Figure 8 As shown, the hook mechanism 40 has a hook rod 41 and a hook 42. The hook rod 41 passes through the hook hole 116 of the body 10 and enters the second mounting area 112b of the housing 11, so that the hook rod 41 can be assembled to the needle rod drive assembly of the body 10. The hook 42 is located outside the mounting space 112 of the body 10 to be assembled to one end of the hook rod 41. In addition, the cutter mechanism 50 is located on the circumference of the feeding wheel 24 of the feeding mechanism 20.

[0043] Please see Figure 1 , Figure 9 and Figure 10 As shown, the presser foot mechanism 60 has a presser foot bracket 61 located outside the housing 11 of the main body 10. The presser foot bracket 61 is generally U-shaped. One end of the presser foot bracket 61 has a foot bracket connecting rod 62. The presser foot bracket 61 is assembled to the main body 10 by passing through the presser foot shaft hole 117 of the main body 10 through the foot bracket connecting rod 62. The other opposite end of the presser foot bracket 61 is pivotally connected to a rotatable presser foot wheel 63. The presser foot wheel 63 is located on one side of the feeding wheel 24 of the feeding mechanism 20. The presser foot wheel 63 is connected to a presser foot transmission assembly (not shown) assembled on the presser foot bracket 61. The presser foot transmission assembly is assembled to a presser foot drive source 64 connected to the presser foot bracket 61. The presser foot drive source 64 is a stepper motor that can generate rotational power, so that the presser foot drive source 64 can drive the presser foot wheel 63 to rotate longitudinally through the presser foot transmission assembly.

[0044] Please see Figure 9 and Figure 10As shown, the presser wheel lifting mechanism 70 is installed on the housing 11 of the main body 10, so that the presser wheel lifting mechanism 70 is located inside the installation space 112 of the housing 11. In this embodiment, the presser wheel lifting mechanism 70 can drive the presser wheel 63 of the presser mechanism 60 to selectively approach or move away from the feeding wheel 24 of the feeding mechanism 20. The presser wheel lifting mechanism 70 mainly has four parts: a lifting drive source 71, a lifting shaft 72, a lifting transmission assembly 73, and a guide assembly 74. The lifting drive source 71 is a stepper motor that can generate rotational power. The lifting drive source 71 is connected to the longitudinal partition 114 of the housing 11, so that the lifting drive source 71 is located inside the second installation area 112b of the housing 11. The lifting shaft 72 passes through the longitudinal partition 114 and is installed laterally on the lifting drive source 71, so that the lifting drive source 71 can drive the lifting shaft 72 to perform lateral rotational movement.

[0045] like Figure 9 and Figure 10 As shown, the lifting transmission assembly 73 of the presser wheel lifting mechanism 70 can convert lateral rotational motion into linear motion. Furthermore, the lifting transmission assembly 73 is disposed between the lifting shaft 72 of the presser wheel lifting mechanism 70 and the foot support connecting rod 62 of the presser foot mechanism 60, such that the lifting transmission assembly 73 is located inside the second mounting area 112b of the body 10. Thus, the lifting transmission assembly 73 can drive the presser foot mechanism 60 to move linearly via the rotating lifting shaft 72. In this embodiment, the lifting transmission assembly 73 mainly consists of a gear 731, a sector gear 732, and a presser foot base 733. Gear 731 is connected to lifting shaft 72, allowing gear 731 to rotate synchronously with lifting shaft 72. One end of sector gear 732 has a pivot portion 732a pivotally connected to the housing 11 of body 10, allowing sector gear 732 to oscillate relative to housing 11. The other end of sector gear 732 has a tooth portion 732b that meshes with gear 731. A movable groove 732c is formed between pivot portion 732a and tooth portion 732b, as shown in the figure. A resistance arm D1 is formed between pivot portion 732a and movable groove 732c (e.g., ...). Figure 11A As shown), a force-applying arm D2 is formed between the pivot portion 732a and the toothed portion 732b (as shown). Figure 11AAs shown), the length of the resistance arm D1 is less than the length of the force-applying arm D2. The movable groove 732c has a longitudinally arranged longitudinal segment 732c1 and a transversely arranged transverse segment 732c2. The longitudinal segment 732c1 is formed at one end of the transverse segment 732c2, so that the longitudinal segment 732c1 intersects and is arranged in the transverse segment 732c2. Thus, the movable groove 732c roughly presents an L-shaped shape. In addition, the presser foot base 733 is connected to the foot connecting rod 62. The presser foot base 733 has a through block 733a with a profile smaller than the movable groove 732c and a connecting platform 733b connected to the guide assembly 74 on the side facing the sector gear 732. The through block 733a can penetrate into the interior of the movable groove 732c, so that the sector gear 732 is movably connected to the presser foot base 733. The connecting platform 733b is set on the periphery of the sector gear 732.

[0046] like Figure 9 and Figure 10 As shown, the guide assembly 74 of the presser wheel lifting mechanism 70 is used to prevent the foot connecting rod 62 of the presser wheel mechanism 60 from swinging during linear movement. The guide assembly 74 is disposed between the housing 11 of the main body 10 and the presser foot base 733 of the presser wheel lifting mechanism 70. In this embodiment, the guide assembly 74 has two parts: a guide seat 741 and a guide block 742. The guide seat 741 is fixedly connected to the inside of the housing 11, and the guide seat 741 is recessed to form a guide rail. The guide rail 741a has two spaced-apart track walls 741b inside. The guide block 742 is connected to the connecting platform 733b of the pressure foot base 733 and penetrates into the interior of the guide rail 741a. Each side of the guide block 742 has a body surface 742a. ​​When the guide block 742 penetrates into the interior of the guide rail 741a, each body surface 742a can contact one of the track walls 741b one by one.

[0047] Please see Figure 3As shown, the control mechanism 80 includes a main power source controller 81, a feeding wheel controller 82, a presser wheel controller 83, and a presser wheel lifting controller 84. The main power source controller 81 is electrically connected to the main power source 13 of the main body 10, and can selectively control the start or stop of the main power source 13. The feeding wheel controller 82 is electrically connected to the feeding drive source 21 of the feeding mechanism 20 to control the rotation of the feeding drive source 21, thereby controlling the rotation speed of the feeding wheel 24. The presser wheel controller 83 is electrically connected to the main power source 13. The presser wheel controller 83 is electrically connected to the presser wheel mechanism 60 and controls the rotation of the presser wheel drive source 64. In turn, the presser wheel controller 83 can control the rotation speed of the presser wheel 63, so that the control mechanism 80 can selectively make the circumferential speed of the presser wheel 63 rotate faster or slower than the circumferential speed of the feed wheel 24. The presser wheel lifting controller 84 is electrically connected to the lifting drive source 71 of the presser wheel lifting mechanism 70, and the presser wheel lifting controller 84 can control the lifting drive source 71 to selectively rotate clockwise or counterclockwise.

[0048] Please see Figure 11A and Figure 11B As shown, this illustrates a specific application where the presser foot lifting mechanism 70 drives the presser foot mechanism 60's presser foot wheel 63 to selectively approach or move away from the feeding wheel 24 of the feeding mechanism 20. Firstly, as... Figure 11AAs shown, the presser wheel lifting controller 84 of the control mechanism 80 controls the adjusting lifting drive source 71 of the presser wheel lifting mechanism 70 to rotate counterclockwise. This causes the adjusting lifting drive source 71 to synchronously drive the lifting shaft 72 of the presser wheel lifting mechanism 70 and the gear 731 of the lifting transmission assembly 73 to move counterclockwise. Consequently, the sector gear 732 of the lifting transmission assembly 73 can swing clockwise through the counterclockwise rotating gear 731. Thus, the sector gear 732 can drive the presser foot mechanism 60 to move via the presser foot base 733 of the lifting transmission assembly 73, moving the presser foot 63 away from the feed wheel 24. In this embodiment, when the lifting drive source 71 drives the sector gear 732 to swing, the lifting drive source 71 can increase the force arm output through the sector gear 732's characteristic that the resistance arm D1 is smaller than the force arm D2. This allows a smaller volume of the lifting drive source 71 to drive the presser foot mechanism 60 to move. As the presser foot wheel 63 gradually moves away from the feed wheel 24, the upper end of the longitudinal section 732c1 of the movable groove 732c approaches the through block 733a of the presser foot base 733, while the lower end of the longitudinal section 732c1 moves away from the through block 733a. This causes the sector gear 732 to oscillate, changing the relative position between the sector gear 732 and the presser foot base 733. Simultaneously, the guide block 742 of the guide assembly 74 moves within the guide rail 741a of the guide seat 741. During this movement, each surface 742a of the guide block 742 continuously contacts the rail wall 741b of the guide rail 741a. Therefore, the presser foot mechanism 60 can avoid being driven by the reciprocating sector gear 732 during linear movement, thus effectively improving the stability of the presser foot mechanism 60's linear movement. Figure 11B As shown, the presser wheel lifting controller 84 controls the lifting drive source 71 to rotate clockwise, so that the lifting drive source 71 synchronously drives the lifting shaft 72 and gear 731 to move clockwise. This causes the sector gear 732 to oscillate counterclockwise through the clockwise rotation of gear 731. Consequently, the movable groove 732c of the sector gear 732 gradually releases the thrust on the through block 733a, allowing a return spring (not shown) inside the foot bracket connecting rod 62 to move the entire presser foot mechanism 60, thus allowing the presser wheel 6 to... 3. When the presser foot 63 is close to the feed wheel 24, the presser foot 63 can be adjacent to the feed wheel 24. When the presser foot 63 is adjacent to the feed wheel 24, the presser foot lifting controller 84 will control the lifting drive source 71 to stop rotating, so that the transverse section 732c2 of the movable groove 732c can be parallel to the foot connecting rod 62 of the presser foot mechanism 60. During the process of the presser foot 63 approaching the feed wheel 24, the upper end of the longitudinal section 732c1 will move away from the through block 733a, and the lower end of the longitudinal section 732c1 will approach the through block 733a.

[0049] Please see Figure 12 As shown, to manually move the presser foot mechanism 60's presser foot wheel 63 selectively closer to or further away from the feeding wheel 24 of the feeding mechanism 20, the presser foot wheel lifting controller 84 of the control mechanism 80 controls the adjusting lifting drive source 71 of the presser foot wheel lifting mechanism 70 to stop operating, so that the sector gear 732 of the lifting transmission assembly 73 remains stationary, allowing the transverse section 732c2 of the movable groove 732c to be parallel to the foot support connecting rod 62 of the presser foot mechanism 60. Next, the sewing operator manually (usually by applying force with a foot pedal or knee) pulls the presser foot mechanism 60, so that the presser foot wheel 63 can move away from the feeding wheel 24, and then the through block 733a of the presser foot base 733 can move from the longitudinal section 732c1 of the movable groove 732c towards the transverse section 732c2 of the movable groove 732c. The presser foot base 733 moves internally, causing the connecting platform 733b to gradually approach the stationary sector gear 732. In this embodiment, when the connecting platform 733b contacts the periphery of the sector gear 732, the presser foot wheel 63 can no longer move away from the feed wheel 24. The threading block 733a is distributed both inside the longitudinal section 732c1 and the transverse section 732c2. When the sewing operator releases the presser foot mechanism 60, the presser foot mechanism 60 can move via a return spring installed inside the foot bracket connecting rod 62, allowing the presser foot wheel 63 to approach the feed wheel 24. Consequently, the threading block 733a can move from the transverse section 732c2 to the interior of the longitudinal section 732c1, while the connecting platform 733b gradually moves away from the stationary sector gear 732.

[0050] Please see Figure 13A and Figure 13BAs shown, the feeding and pulling machine 1 is used to sew two pieces of fabric S together. The main power source controller 81 of the control mechanism 80 controls the main power source 13 of the main body 10 to operate, so that the main power source 13 drives the main shaft 15 of the main body 10 to rotate. The rotating main shaft 15 drives the needle 31 of the needle bar mechanism 30 and the hook needle 42 of the hook needle mechanism 40 to perform sewing operations through the needle bar transmission assembly (not shown) of the main body 10. In addition, the feeding wheel controller 82 and the presser foot wheel controller 83 of the control mechanism 80 respectively control the feeding drive source 21 of the feeding mechanism 20 and the presser foot drive source 64 of the presser foot mechanism 60 to perform sewing operations. In operation, the feeding drive source 21 drives the feeding wheel 24 to rotate longitudinally around the feeding shaft 23 via the drive shaft 22, the steering assembly 25 and the feeding shaft 23. The presser foot drive source 64 drives the presser foot wheel 63 of the presser foot mechanism 60 to rotate longitudinally via the presser foot transmission assembly of the presser foot mechanism 60. However, the rotating feeding wheel 24 and the rotating presser foot wheel 63 can drive the two sewn materials S (such as shoe insoles or shoe uppers) located between the feeding wheel 24 and the presser foot wheel 63 to move intermittently, so that the two sewn materials S are sewn together by the thread brought out by the needle 31 and the hook 42, and thus multiple seams will be formed on the surface of the two sewn materials S.

[0051] like Figure 13A As shown, during the process of the feeding and sewing machine 1 sewing two pieces of fabric S together, if the area where the two pieces of fabric S are sewn together is a straight area, the feeding wheel controller 82 and the presser foot wheel controller 83 of the control mechanism 80 respectively control the rotation of the feeding drive source 21 of the feeding mechanism 20 and the rotation of the presser foot drive source 64 of the presser foot mechanism 60, so that the circumferential speed of the feeding wheel 24 is approximately the same as the circumferential speed of the presser foot wheel 63, and thus no differential feeding occurs between the two pieces of fabric S. Figure 13B As shown, if the area where the two sewn items S are sewn together is a turning area, the feed wheel controller 82 of the control mechanism 80 will increase the rotation of the feed drive source 21, while the presser foot wheel controller 83 of the control mechanism 80 will decrease the rotation of the presser foot drive source 64. This causes the circumferential speed of the presser foot wheel 63 to be less than the circumferential speed of the feed wheel 24, resulting in differential feeding between the two sewn items S, causing them to bend towards the presser foot wheel 63. While each stitch in the turning area maintains the same stitch length due to friction during sewing, the stitch length of the stitches in the turning area will be less than that in the straight area. However, the bending of the two sewn items S towards the presser foot wheel 63 is only for illustrative purposes. Figure 13CAs shown, the feed wheel controller 82 of the control mechanism 80 can control to reduce the rotation of the feed drive source 21, while the presser foot wheel controller 83 of the control mechanism 80 can control to increase the rotation of the presser foot drive source 64, so that the circumferential speed of the presser foot wheel 63 is greater than the circumferential speed of the feed wheel 24, thereby causing differential feeding between the two sewn materials S so that the two sewn materials S will bend towards the direction of the feed wheel 24.

[0052] The above description is illustrative only and not restrictive. Those skilled in the art will understand that many modifications, variations or equivalents can be made without departing from the spirit and scope of the technical concept, and all such modifications, variations or equivalents will fall within the protection scope of this utility model.

Claims

1. A feeding and stretching machine, characterized in that, include: A housing with a rotating main shaft; A needle bar mechanism has a needle bar connected to the main shaft and a needle connected to the needle bar. The needle bar can drive the needle to reciprocate through the rotating main shaft. A presser foot mechanism includes a presser foot bracket mounted outside the housing, the presser foot bracket having a presser foot wheel located outside the housing and a presser foot drive source capable of driving the presser foot wheel to rotate; and A feeding mechanism, connected to the housing, includes a feeding drive source, a drive shaft, a feeding shaft, a feeding wheel, and a steering assembly, wherein: The feeding drive source is located inside the housing; The drive shaft is connected to the feeding drive source via a transverse axis, so that the drive shaft can be driven by the feeding drive source to rotate laterally. The feeding shaft is movably assembled to the housing via a longitudinal axis intersecting the transverse axis, so that the feeding shaft can rotate longitudinally relative to the housing. The feed roller is connected to the feed shaft and positioned on one side of the presser foot roller; and The steering assembly is used to convert lateral rotation into longitudinal rotation and is connected between the drive shaft and the feed shaft, so that the drive shaft, which is performing lateral rotation, can drive the feed shaft and the feed wheel to rotate longitudinally synchronously through the steering assembly.

2. The feeding and stretching machine according to claim 1, characterized in that, The housing has a surrounding wall to form an installation space inside the housing. The installation space is provided with a transverse partition spaced apart from the bottom of the housing and a longitudinal partition space extending from the transverse partition space toward the bottom of the housing. The installation space is divided into a first installation area and a second installation area by the transverse partition space and the longitudinal partition space. The first installation area is used to accommodate the feeding drive source, and the second installation area is used to accommodate the needle bar.

3. The feeding and stretching machine according to claim 2, characterized in that, The feeding and stretching machine also has a support frame, which has a bearing portion connected to the longitudinal partition wall and the surrounding ring wall and a through portion that can penetrate into the first installation area. The bearing portion is adjacent to the feeding drive source to reduce the height space required by the feeding drive source device in the first installation area, and the through portion can be passed through by the drive shaft.

4. The feeding and stretching machine according to claim 1, characterized in that, The drive shafts are spaced apart below the needle bar and arranged parallel to the needle bar, such that the feed shaft is arranged perpendicular to the needle bar.

5. The feeding and stretching machine according to claim 1, characterized in that, The feeding and stretching machine also has a presser wheel lifting mechanism that can selectively move the presser wheel closer to or further away from the feeding wheel. The presser wheel lifting mechanism has a lifting drive source located inside the machine housing, a lifting shaft that can be driven by the lifting drive source to rotate, and a lifting transmission assembly that can change the rotational motion into linear motion. The lifting transmission assembly is disposed between the lifting shaft and a foot connecting rod connected to the presser frame, so that the lifting transmission assembly can drive the presser mechanism to move linearly through the rotating lifting shaft.

6. The feeding and stretching machine according to claim 5, characterized in that, The lifting transmission assembly has a gear connected to the lifting shaft, a sector gear pivotally connected to the housing, and a pressure foot base connected to the foot bracket connecting rod. The gear meshes with the sector gear, so that the gear can drive the sector gear to swing through the rotating lifting shaft. The sector gear is movably connected to the pressure foot base, so that the swinging of the sector gear can change the relative positional relationship between the sector gear and the pressure foot base.

7. The feeding and stretching machine according to claim 6, characterized in that, The sector gear has a movable groove, and the presser foot base has a through block that can be inserted into the movable groove. The contour of the movable groove is larger than the contour of the through block, and it has a longitudinal section and a transverse section that intersects the longitudinal section. When the sector gear swings, one end of the longitudinal section will approach the through block, while the other end of the longitudinal section will move away from the through block.

8. The feeding and stretching machine according to claim 7, characterized in that, One end of the sector gear is provided with a pivot portion that is pivotally connected to the housing, and the other end is provided with a tooth portion that can mesh with the gear. The movable groove is formed between the pivot portion and the tooth portion. A resistance arm is formed between the pivot portion and the movable groove, and a force-applying arm with a length greater than the resistance arm is formed between the pivot portion and the tooth portion.

9. The feeding and stretching machine according to claim 6, characterized in that, The lifting transmission assembly also includes a guide assembly between the housing and the presser foot base, which prevents the foot connecting rod from swinging during linear movement.

10. The feeding and stretching machine according to claim 9, characterized in that, The guide assembly has a guide seat connected inside the housing and a guide block connected to the pressure foot base. The guide seat is recessed to form a guide rail, and two rail walls are formed inside the guide rail that are spaced apart from each other. Each side of the guide block has a body surface that penetrates into the interior of the guide rail, so that each body surface can contact one of the rail walls one by one.

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