Dragging wheel feeding mechanism and cutter clutch mechanism of lockstitch sewing machine

Abstract

The utility model belongs to the technical field of sewing machines, and particularly relates to a dragging wheel feeding mechanism and a cutter clutch mechanism of a lockstitch sewing machine, which comprise a machine base and a machine shell, and an upper dragging wheel feeding mechanism, a lower dragging wheel feeding mechanism and a cutter clutch mechanism are respectively arranged in the machine base and the machine shell. According to the utility model, the rotation speed of the upper and lower dragging wheel groups can be respectively controlled and adjusted through the upper dragging wheel feeding mechanism and the lower dragging wheel feeding mechanism, and the front and back positions of the locking piece can be moved through the cutter clutch mechanism, so that the locking piece and the cutter mounting seat are in a separated or connected state, and the movement of the cutter is controlled.

Description

Technical Field

[0001] This utility model relates to the field of sewing machine technology, and specifically to a roller feeding mechanism and a cutter clutch mechanism for a flat sewing machine. Background Technology

[0002] Existing sewing machines use one or more sewing threads to create one or more stitches on fabric, interweaving or sewing together one or more layers of fabric. During the sewing process, existing sewing machines still require manual fabric feeding. Because it's difficult to control the feeding speed manually, this can easily lead to excessively large or small stitch spacing, affecting the sewing effect and quality. Therefore, improvements to the existing sewing machine fabric feeding mechanism are needed. Utility Model Content

[0003] The purpose of this invention is to provide a roller feeding mechanism and a cutter clutch mechanism for a flat sewing machine, which solves the problem of difficulty in controlling the fabric conveying speed in existing systems through the upper and lower roller feeding mechanisms.

[0004] The purpose of this utility model is achieved as follows: a roller feeding mechanism and a cutter clutch mechanism for a flat sewing machine, including a machine base and a machine housing, comprising...

[0005] The upper trolley feeding mechanism includes a main shaft housed within a machine housing. A trolley seat is located at the head of the machine housing, and an upper trolley assembly is rotatably mounted within the trolley seat. A mounting base is located on the side of the machine housing, and a cover plate is installed on the outer side of the mounting base. The upper trolley feeding mechanism is housed within the mounting base. The upper trolley feeding mechanism includes an upper feeding shaft rotatably mounted within the mounting base. One end of the upper feeding shaft is connected to the upper trolley assembly via a transmission mechanism. A feeding crank is mounted on the outer periphery of the other end of the upper feeding shaft. The other end of the feeding crank is connected to a connecting rod, and the other end of the connecting rod is connected to... The device is equipped with a swinging component, and a connecting rod 2 is connected to the other end of the swinging component. An eccentric wheel for connecting to and rotating synchronously with the main shaft is formed at the other end of the connecting rod 2. A rotating component is provided in the middle of the swinging component, and a rotating shaft is passed through the rotating component. Adjusting seats are connected to both ends of the rotating shaft. The side of the adjusting seat is rotatably connected to the mounting seat through a rotating column. An adjusting part 1 is formed at one end of the adjusting seat. An adjusting component is screwed into the adjusting part 1. An adjusting through hole is provided on the cover plate for the adjusting component to extend out. A limiting component is screwed into the outer periphery of the adjusting component. The limiting component is set in the adjusting through hole.

[0006] The lower roller feeding mechanism includes a roller shaft and a one-way transmission wheel set, which are rotatably mounted below the machine base. The lower roller is mounted on the outer periphery of the roller shaft. One end of the one-way transmission wheel set is connected to the roller shaft and is used to drive it to rotate synchronously. The other end of the one-way transmission wheel set is connected to a connecting rod four. The other end of the connecting rod four is connected to a connecting rod five. The other end of the connecting rod five is mounted with a rotary adjustment component. An adjustment shaft is formed at the eccentric part of the rotary adjustment component. A swing rod is connected to the outer periphery of the adjustment shaft. The swing rod is used to connect to the feeding shaft and can be driven by the feeding shaft to swing back and forth.

[0007] The cutter clutch mechanism includes a cutter drive shaft rotatably mounted inside a housing. One end of the cutter drive shaft is connected to the main shaft via a first linkage mechanism, and the other end of the cutter drive shaft is connected to a second linkage mechanism. The other end of the second linkage mechanism is connected to a cutter swing member. The middle end of the cutter swing member is rotatably connected to the housing, and the other end of the cutter swing member is provided with a locking member. A sliding column is provided on the lower end face of the machine head of the housing. A cutter mounting seat is provided on the outer periphery of the sliding column. A cutter assembly is mounted on one side of the cutter mounting seat. A locking groove for the locking member to engage is formed on the side of the cutter mounting seat. A mounting frame is provided on the lower end face of the housing. A rotating shaft is rotatably mounted inside the mounting frame. An operating handle for controlling the rotation of the rotating shaft is mounted on one end of the rotating shaft. A separation frame is mounted on the outer periphery of the rotating shaft. A fork for driving the locking member to move is formed at the lower end of the separation frame, so that the locking member engages or disengages from the locking groove.

[0008] Preferably, a separation plate is installed on the side of the separation frame, a connecting rod six is ​​installed at one end of the separation plate, the other end of the connecting rod six is ​​hinged to the operating handle, a connecting plate is formed at the other end of the separation plate, and the other end of the connecting plate is connected to the cutter mounting seat. A limit post one is provided on the side of the separation frame, and a guide groove one and a guide groove two are respectively opened in the separation plate for the limit post one to move.

[0009] Preferably, a drive wheel one and a drive wheel two are respectively installed on the other end of the rotating shaft. The drive wheel one is fixedly connected to the rotating shaft, and the drive wheel two is rotatably sleeved on the outer periphery of the rotating shaft. A lever is provided on one side of the drive wheel. One end of the lever is rotatably connected to the mounting bracket, and the other end of the lever is provided with a locking part. A torsion spring abuts against the mounting bracket at one end of the lever so that the locking part tends to move closer to the drive wheel. The outer periphery of the drive wheel one is formed with an arc-shaped groove for rotating the lever. A limit notch is provided on one side of the drive wheel one. The outer periphery of the drive wheel two is formed with a rectangular groove for locking the locking part. A limit post two is provided on the drive wheel two. The limit post two is located in the limit notch so that the drive wheel two can rotate when the drive wheel one rotates.

[0010] Preferably, the other end of the cutter swing member is formed with a mounting cylinder three, and the locking member is movably disposed inside the mounting cylinder three. A push button is provided at the rear end of the locking member, and a spring is connected between the locking member and the mounting cylinder three to make the locking member move towards the side closer to the locking groove. The first linkage mechanism includes a front cutter crank mounted on the outer periphery of one end of the cutter drive shaft. The other end of the front cutter crank is connected to a cutter transmission linkage. The other end of the cutter transmission linkage is provided with a cutter eccentric wheel for mounting on the outer periphery of the main shaft. The second linkage mechanism includes a rear cutter crank mounted on the outer periphery of the other end of the cutter drive shaft. The other end of the rear cutter crank is connected to a cutter pull rod, and the other end of the cutter pull rod is connected to the cutter swing member.

[0011] Preferably, the side of the adjusting seat is formed with a rotating column, the inner side of the cover plate is formed with a connecting rod three, and the other end of the connecting rod three is provided with a mounting cylinder one for sleeved on the outer periphery of the rotating column; fastening holes one are respectively opened around the cover plate, and fastening holes two are opened on the outer end face of the mounting seat.

[0012] Preferably, the transmission mechanism includes an upper swing crank mounted on the outer periphery of the upper feed shaft, the other end of the upper swing crank being connected to a feed rod, the lower end of the feed rod being connected to a lower swing crank, and the other end of the lower swing crank being connected to an upper trolley assembly; the upper trolley assembly includes a trolley and a one-way wheel disposed on its inner periphery; a bushing is disposed between the outer periphery of the upper feed shaft and the mounting base.

[0013] Preferably, a hinge shaft is provided between the fourth and fifth connecting rods, and the other end of the fifth connecting rod is provided with a mounting hole for installing a rotary adjustment component. The outer end of the rotary adjustment component is formed with an adjustment part two, and one end of the swing rod is provided with a mounting hole two for installing an adjustment shaft. An adjustment groove is formed on the adjustment part two, and a fastening hole is provided on the side wall of the mounting hole two.

[0014] Preferably, the unidirectional transmission wheel set includes a wheel frame, a transmission wheel shaft is provided inside the wheel frame, and a driving wheel and a second unidirectional wheel for driving the driving wheel to rotate in one direction are respectively installed on the outer periphery of the transmission wheel shaft; a driven wheel is provided at one end of the traction wheel shaft, and a transmission belt is connected between the driven wheel and the driving wheel.

[0015] Preferably, one end of the connecting rod four is formed with a sleeve portion for mounting on the outer periphery of the one-way wheel two; a wheel seat is provided below the base, the wheel seat contains the towing wheel shaft, and bearings are provided between the two ends of the towing wheel shaft and the wheel seat.

[0016] Preferably, the swing arm has a mounting cylinder 2 formed inside for mounting on the outer periphery of the feed shaft, and the other end of the swing arm has a connecting part for connecting to the tooth holder seat.

[0017] The outstanding and beneficial technical effects of this utility model compared to the prior art are:

[0018] 1. This utility model, through the design of the adjusting component, enables the adjustment seat to swing when the rotation speed of the upper trolley group needs to be adjusted during actual operation. The swinging of the adjusting seat will drive the swinging component to swing through the rotating shaft. That is, by changing the installation angle of the adjusting seat and the swinging component, the swing amplitude of the upper feeding shaft can be adjusted, and finally the rotation speed of the upper trolley group can be adjusted.

[0019] 2. This utility model, through the design of the rotary adjustment component, allows for the adjustment of the angle of the rotary adjustment component during actual operation, thereby changing the installation angle between connecting rod four, connecting rod five, and swing rod. By adjusting the swing amplitude, the rotation angle of the lower trolley during each swing can be adjusted, thus achieving the adjustment of the feeding speed of the lower trolley. This adjustment structure is simple and the adjustment operation is convenient.

[0020] 3. This utility model, through the design of the cutter drive shaft, enables the cutter drive shaft to reciprocate through linkage mechanism one when the main shaft rotates during actual operation. Then, linkage mechanism two drives the cutter to move up and down, thereby achieving the function of cutting fabric. Compared with the prior art, there is no need to set up a separate power source to control the cutter, which effectively reduces costs. Furthermore, the locking part can be moved back and forth through the operating handle, so that the locking part and the cutter mounting base are separated or connected, thereby controlling the movement of the cutter. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the feeding mechanism and the cutting clutch mechanism.

[0022] Figure 2 This is a schematic diagram of the upper roller feeding mechanism inside a sewing machine.

[0023] Figure 3 Schematic diagram of the upper tugboat feeding mechanism Figure 1 .

[0024] Figure 4 Schematic diagram of the upper tugboat feeding mechanism Figure 2 .

[0025] Figure 5 Schematic diagram of the upper tugboat feeding mechanism Figure 3 .

[0026] Figure 6 This is an exploded view of the components of the upper tugboat feeding mechanism.

[0027] Figure 7 This is a schematic diagram of the feeding mechanism of the lower roller inside a sewing machine.

[0028] Figure 8 Schematic diagram of the three-dimensional structure of the lower tugboat feeding mechanism Figure 1.

[0029] Figure 9 This is an exploded view of the components of the lower tugboat feeding mechanism.

[0030] Figure 10 Schematic diagram of the three-dimensional structure of the lower tugboat feeding mechanism Figure 2 .

[0031] Figure 11 This is a schematic diagram of the rocker arm, connecting rod five, and rotary adjustment component.

[0032] Figure 12 This is a schematic diagram of the internal cutting blade clutch mechanism of a sewing machine.

[0033] Figure 13 Schematic diagram of the cutter clutch mechanism Figure 1 .

[0034] Figure 14 Schematic diagram of the cutter clutch mechanism Figure 2 .

[0035] Figure 15 Schematic diagram of the structure when the locking element is separated from the cutter mounting base. Figure 1 .

[0036] Figure 16 Schematic diagram of the structure when the locking element is separated from the cutter mounting base. Figure 2 .

[0037] Figure 17 This is a schematic diagram of the structure when the locking element is connected to the cutter mounting base. Figure 1 .

[0038] Figure 18 This is a schematic diagram of the structure when the locking element is connected to the cutter mounting base. Figure 2 .

[0039] Figure 19 This is a schematic diagram of the exploded structure of the components of the cutting tool clutch mechanism.

[0040] Reference numerals: 1-Machine housing; 2-Main shaft; 3-Drawer seat; 4-Upper drawer assembly; 5-Mounting seat; 6-Cover plate; 8-Upper feed shaft; 9-Transmission mechanism; 10-Feed crank; 11-Connecting rod one; 12-Oscillating component; 13-Connecting rod two; 14-Eccentric wheel; 15-Rotating component; 16-Rotating shaft; 17-Adjusting seat; 18-Rotating column; 19-Adjusting part one; 20-Adjusting component; 21-Adjusting through hole; 22-Limiting component; 23-Connecting rod three; 24-Mounting cylinder one; 25-Fasting hole one; 27-Upper swing crank; 28-Feeding pull rod; 29-Lower swing crank; 30-Drawer; 31-One-way wheel one; 32-Shaft sleeve;

[0041] 41-Base; 42-Drag wheel shaft; 43-One-way drive wheel set; 44-Lower drag wheel; 45-Connecting rod four; 46-Connecting rod five; 47-Rotation adjustment component; 48-Adjusting shaft; 49-Swing rod; 50-Feeding shaft; 51-Hinge shaft one; 52-Mounting hole one; 53-Adjusting part two; 54-Mounting hole two; 55-Adjusting groove; 56-Fastening hole; 57-Wheel frame; 58-Drive wheel shaft; 59-Driving wheel; 60-One-way wheel two; 61-Driven wheel; 62-Drive belt; 63-Sleeve part; 64-Wheel seat; 65-Bearing; 66-Mounting sleeve two; 67-Connecting part; 68-Tooth bracket seat;

[0042] 70-Cutter drive shaft; 71-Linkage mechanism one; 72-Linkage mechanism two; 73-Cutter swing arm; 74-Locking component; 75-Sliding column; 76-Cutter mounting base; 77-Cutter assembly; 78-Locking groove; 79-Mounting bracket; 80-Rotating shaft; 81-Operating handle; 82-Separation frame; 83-Fork; 84-Separation plate; 85-Linkage six; 86-Connecting plate; 87-Limit post one; 88-Guide groove one; 8 9-Guide groove 2; 90-Drive wheel 1; 91-Drive wheel 2; 92-Pulley; 93-Snap-fit ​​part; 94-Torsion spring; 95-Arc-shaped groove; 96-Limit notch; 97-Rectangular groove; 98-Limit post 2; 99-Mounting cylinder 3; 100-Push button; 101-Spring; 102-Front cutter crank; 103-Cutter transmission linkage; 104-Cutter eccentric wheel; 105-Rear cutter crank; 106-Cutter pull rod;

[0043] 111-Upper trolley feeding mechanism; 222-Lower trolley feeding mechanism; 333-Cutter clutch mechanism. Detailed Implementation

[0044] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings.

[0045] like Figure 1-6 As shown, a roller feeding mechanism and a cutter clutch mechanism for a flat sewing machine include a machine base 41 and a machine housing 1. The machine housing 111 includes an upper roller feeding mechanism 111, which includes a main shaft 2 disposed inside the machine housing 1. The main shaft 2 is disposed inside the machine housing 1. A roller seat 3 is disposed at the head of the machine housing 1. An upper roller assembly 4 is rotatably disposed inside the roller seat 3. The upper roller assembly 4 is located above the machine base and can cooperate with the lower roller below to achieve synchronous feeding.

[0046] The side of the housing 1 is provided with a mounting base 5, and the outer side of the mounting base 5 is provided with a cover plate 6. The upper feeding shaft 8 is rotatably installed inside the mounting base 5. One end of the upper feeding shaft 8 is connected to the upper drag wheel group 4 through the transmission mechanism 9, thereby driving the upper drag wheel group 4 to rotate. The other end of the upper feeding shaft 8 is equipped with a feeding crank 10. The other end of the feeding crank 10 is connected to a connecting rod 11. The other end of the connecting rod 11 is connected to a swing member 12. The other end of the swing member 12 is connected to a connecting rod 13. The other end of the connecting rod 13 is formed with an eccentric wheel 14 for connecting with the main shaft 2 and rotating synchronously. When the main shaft 2 rotates, it will drive the upper feeding shaft 8 to rotate back and forth left and right through the eccentric wheel 14, the connecting rod 13, the swing member 12, the connecting rod 11, and the feeding crank 10. The main shaft 2 in the sewing machine is used as the power source to drive the upper feeding shaft 8 and the upper drag wheel group 4. There is no need to set up a separate power source for control. This structure is simple and can reduce costs.

[0047] A rotating component 15 is provided in the middle of the swing component 12. A rotating shaft 16 is passed through the rotating component 15. Adjusting seats 17 are connected to both ends of the rotating shaft 16. The side of the adjusting seat 17 is rotatably connected to the mounting base 5 through a rotating column 18. An adjusting part 19 is formed at one end of the adjusting seat 17. An adjusting component 20 is screwed into the adjusting part 19. An adjusting through hole 21 is provided on the cover plate 6 for the adjusting component 20 to extend out. A limiting rotating component 22 is screwed to the outer periphery of the adjusting component 20. The limiting rotating component 22 is disposed in the adjusting through hole 21.

[0048] This utility model, through the design of the adjusting component 20, enables the adjusting seat 17 to swing when the rotation speed of the upper trolley group 4 needs to be adjusted during actual operation. The swinging of the adjusting seat 17 will drive the swinging component 12 to swing through the rotating shaft 16. That is, by changing the installation angle of the adjusting seat 17 and the swinging component 12, the swing amplitude of the upper feeding shaft 8 can be adjusted, and finally the rotation speed of the upper trolley group 4 can be adjusted.

[0049] like Figure 7-11 As shown, the device includes a lower roller feeding mechanism 222, which includes a roller shaft 42 and a one-way transmission wheel set 43 rotatably mounted below the base 41. A lower roller 44 for conveying fabric is mounted on the outer periphery of the roller shaft 42. One end of the one-way transmission wheel set 43 is connected to the roller shaft 42 and is used to drive it to rotate synchronously. The other end of the one-way transmission wheel set 43 is connected to a connecting rod 45, and the other end of the connecting rod 45 is connected to a connecting rod 46. A rotation adjustment component 47 is mounted on the other end of the connecting rod 46. An adjustment shaft 48 is formed at the eccentric part of the rotation adjustment component 47. A swing rod 49 is connected to the outer periphery of the adjustment shaft 48. The swing rod 49 is used to connect to the feeding shaft 50 and can be driven by the feeding shaft 50 to swing back and forth.

[0050] This utility model, through the design of a rotary adjustment component, allows for the adjustment of the angle of the rotary adjustment component 47 during actual operation. This changes the installation angle between the connecting rod 45, connecting rod 46, and swing rod 49. By adjusting the swing amplitude, the rotation angle of the lower trolley 5 during each swing can be adjusted, thereby regulating the feeding speed of the lower trolley 5. This adjustment structure is simple and the adjustment operation is convenient.

[0051] In actual operation, the feeding shaft 50 can drive the swing arm 49, connecting rod 5 46, and connecting rod 45 to swing back and forth. Through the design of the one-way transmission wheel set 43, when the swing arm 49 swings forward, it can drive the one-way transmission wheel set 43 to rotate. When the swing arm 49 swings in the opposite direction, it will not drive the one-way transmission wheel set 43 to rotate, thereby driving the lower drag wheel 44 to maintain one-way rotation and realize the feeding action.

[0052] like Figure 12-19 As shown, and including a cutter clutch mechanism 333, the cutter clutch mechanism 333 includes a...

[0053] A cutter drive shaft 70 is rotatably mounted inside the housing 1. One end of the cutter drive shaft 70 is connected to the main shaft 2 via a first linkage mechanism 71, and the other end of the cutter drive shaft 70 is connected to a second linkage mechanism 72. The other end of the second linkage mechanism 72 is connected to a cutter swing member 73, the middle end of which is rotatably connected to the housing 1. A locking member 74 is provided at the other end of the cutter swing member 73. A sliding column 75 is provided on the lower end face of the machine head of the housing 1, and a cutter mounting base 76 is provided on the outer periphery of the sliding column 75 in a height-adjustable manner. A cutter assembly 77 is installed on one side of the mounting base 76. A locking groove 78 for the locking member 74 to engage is formed on the side of the cutter mounting base 76. A mounting bracket 79 is provided on the lower end face of the housing 1. A rotating shaft 80 is rotatably installed inside the mounting bracket 79. An operating handle 81 for controlling the rotation of the rotating shaft 80 is installed at one end of the rotating shaft 80. A separation bracket 82 is installed on the outer periphery of the rotating shaft 80. A fork 83 for driving the locking member 74 to move is formed at the lower end of the separation bracket 82 so that the locking member 74 engages or disengages from the locking groove 78.

[0054] This invention, through the design of the cutter drive shaft 70, enables the cutter drive shaft 70 to reciprocate during actual operation when the main shaft 2 rotates, via the first linkage mechanism 71, and then via the second linkage mechanism 71, to drive the cutter to move up and down, thereby achieving the function of cutting fabric. Compared with the prior art, there is no need to set up a separate power source to control the cutter, which effectively reduces costs. Furthermore, the locking member 74 can be moved back and forth by operating the handle 81, so that the locking member and the cutter mounting base 76 are separated or connected, thereby controlling the movement of the cutter.

[0055] A separation plate 84 is installed on the side of the separation frame 82. A connecting rod 85 is installed at one end of the separation plate 84, and the other end of the connecting rod 85 is hinged to the operating handle 81. A connecting plate 86 is formed at the other end of the separation plate 84, and the other end of the connecting plate 86 is connected to the cutter mounting seat 76. A limit post 87 is provided on the side of the separation frame 82. A guide groove 88 and a guide groove 89 for the limit post 87 to move are respectively opened in the separation plate 84. When the operating handle 81 is turned downward, the separation frame 82 will be moved forward through the rotating shaft 80, thereby moving the locking member 74 to the side closer to the locking groove 78. The connecting rod 85, the separation plate 84, and the connecting plate 86 will drive the cutter mounting seat 76 to move downward, so that one end of the locking member 74 is locked in the locking groove 78, and the limit post 87 moves from the guide groove 88 to the guide groove 89.

[0056] The other end of the rotating shaft 80 is respectively equipped with a drive wheel 90 and a drive wheel 91. The drive wheel 90 is fixedly connected to the rotating shaft 80, and the drive wheel 91 is rotatably sleeved on the outer periphery of the rotating shaft 80. A lever 92 is provided on one side of the drive wheel. One end of the lever 92 is rotatably connected to the mounting bracket 79, and the other end of the lever 92 is provided with a locking part 93. One end of the lever 92 abuts against the mounting bracket 79 with a torsion spring 94, so that the locking part 93 tends to move closer to the drive wheel. The outer periphery of the drive wheel 90 is formed with an arc-shaped groove 95 for rotating the lever 92. A limit notch 96 is provided on one side of the drive wheel 90. The outer periphery of the drive wheel 91 is formed with a rectangular groove 97 for the locking part 93 to engage. A limit post 98 is provided on the drive wheel 91. The limit post 98 is located in the limit notch 96 so that when the drive wheel 90 rotates, it drives the drive wheel 91 to rotate accordingly.

[0057] This utility model, through the design of the separation plate 84, enables [specific details to be added] during actual operation. Figure 15 When the locking element is located away from the locking groove, the limiting post 87 is located within the guide groove 88, in conjunction with... Figure 16 and Figure 19 Meanwhile, the locking part 93 is engaged within the rectangular groove 97 to restrict the movement of the locking member, keeping the locking member separated from the cutter mounting base 76. Figure 18 and Figure 19When the operating handle 81 is turned downwards, the separating plate 84 moves the cutter mounting base 76 downwards via the connecting plate 86. Simultaneously, the separating frame 82 pushes the locking member closer to the locking groove, with one end of the locking member engaged in the locking groove. Meanwhile, the rotating shaft 80 drives the second drive wheel 91 to rotate, causing the locking part 93 to slide on the end face of the arc-shaped groove 95. At the same time, the first drive wheel 90 pushes the second limit post 98 through the limiting notch 96, causing the second drive wheel 91 to rotate simultaneously. This engages the locking part 93 into another rectangular groove 97, keeping the second drive wheel 91 in its current position to restrict the movement of the locking member. This maintains the connection between the locking member and the cutter mounting base 76. See details... Figure 17 At this time, the locking element is positioned in the locking groove, and the limiting post 87 is located in the guide groove 89.

[0058] The other end of the cutter swing member 73 is formed with a mounting cylinder 3 99, and the locking member 74 is movably disposed inside the mounting cylinder 3 99. The rear end of the locking member 74 is provided with a push button 100, so that the separation frame 82 can drive the locking member 74 to move through the fork 83. A spring 101 is connected between the locking member 74 and the mounting cylinder 3 99, so that the locking member 74 tends to move towards the side closer to the locking groove 78. The first linkage mechanism 71 includes a front cutter crank 102 installed on the outer periphery of one end of the cutter drive shaft 70. The other end of the front cutter crank 102 is connected to a cutter transmission link 103. The other end of the cutter transmission link 103 is provided with a cutter eccentric wheel 104 for installation on the outer periphery of the main shaft 2. The second linkage mechanism 72 includes a rear cutter crank 105 installed on the outer periphery of the other end of the cutter drive shaft 70. The other end of the rear cutter crank 105 is connected to a cutter pull rod 106. The other end of the cutter pull rod 106 is connected to the cutter swing member 73.

[0059] The side of the adjusting seat 17 is formed with a rotating column 18, and the inner side of the cover plate 6 is formed with a connecting rod 23. The other end of the connecting rod 23 is provided with a mounting sleeve 24 for fitting around the rotating column 18, so as to realize the rotational installation of the adjusting seat 17. This installation structure is simple and easy to disassemble and assemble. The cover plate 6 is provided with fastening holes 25 on its four sides, and the outer end face of the mounting seat 5 is provided with fastening holes 2. In the actual installation process, the cover plate 6 and the mounting seat 5 can be fixedly connected by screwing fasteners into the fastening holes.

[0060] The transmission mechanism 9 includes an upper swing crank 27 mounted on the outer periphery of the upper feed shaft 8. The other end of the upper swing crank 27 is connected to a feed rod 28, and the lower end of the feed rod 28 is connected to a lower swing crank 29. The other end of the lower swing crank 29 is connected to an upper traction wheel assembly 4, thereby converting the left-right reciprocating swing of the upper feed shaft 8 into the rotation of the upper traction wheel assembly 4. The upper traction wheel assembly 4 includes a traction wheel 30 and a one-way wheel 31 disposed on its inner periphery. The other end of the lower swing crank 29 is first connected to the one-way wheel 31, and then drives the traction wheel 30 to rotate in one direction through the one-way wheel 31. A bushing 32 is provided between the outer periphery of the upper feed shaft 8 and the mounting base 5 to improve the stability during rotation.

[0061] A hinge shaft 51 is provided between connecting rod 45 and connecting rod 46. The other end of connecting rod 46 has a mounting hole 52 for mounting a rotary adjustment component 47. The outer end of the rotary adjustment component 47 has an adjustment part 53 to facilitate adjustment of the angle of the rotary adjustment component 47. One end of the swing rod 49 has a mounting hole 54 for mounting an adjustment shaft 48. This technical solution achieves the effect of adjusting the installation angle between connecting rod 45, connecting rod 46, and swing rod 49 during the rotation of the rotary adjustment component 47 by using an eccentrically set adjustment shaft. Compared with the prior art that uses the adjustment of the hinge shaft in the waist-shaped hole, the adjustment operation of this technical solution is simpler, the number of parts is reduced, and the cost is lower.

[0062] The second adjustment part 53 has an adjustment groove 55 formed on it. The adjustment groove 55 is in the shape of a straight line or a cross, so as to facilitate adjustment with a screwdriver. The side wall of the second mounting hole 54 has a fastening hole 56. A fastener for fixing the adjustment shaft 48 is installed in the fastening hole 56. In the actual adjustment process, the fastener needs to be loosened first, and then the rotating adjustment part 47 is adjusted.

[0063] The unidirectional drive wheel assembly 43 includes a wheel frame 57 fixed to the lower end face of the base 41. A drive wheel shaft 58 is provided inside the wheel frame 57. A drive wheel 59 and a unidirectional wheel 60 for driving the drive wheel 59 to rotate in one direction are respectively installed on the outer periphery of the drive wheel shaft 58. This technical solution can reduce the failure rate and maintenance cost by designing the drive wheel 59 and the unidirectional wheel 60 separately.

[0064] One end of the towing shaft 42 is provided with a driven wheel 61, and a transmission belt 62 is connected between the driven wheel 61 and the driving wheel 59, thereby driving the towing shaft 42 and the lower towing wheel 44 to rotate synchronously and realize the feeding action; one end of the connecting rod 45 is formed with a sleeve portion 63 for mounting on the outer periphery of the one-way wheel 60, and the sleeve portion 63 is connected to the one-way wheel 60 through a keyway.

[0065] A wheel seat 64 is provided below the base 41, and the wheel axle 42 is provided inside the wheel seat 64. Bearings 65 are provided between the two ends of the wheel axle 42 and the wheel seat 64 to improve its stability during rotation. The swing rod 49 has a mounting cylinder 66 formed inside for mounting on the outer periphery of the feeding shaft 50. The other end of the swing rod 49 has a connecting part 67 for connecting to the tooth holder seat 68. The feeding shaft 50 provides a power source for the feeding tooth and the wheel through the swing rod 49.

[0066] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A roller feeding mechanism and a cutter clutch mechanism for a flat sewing machine, comprising a base (41) and a housing (1), characterized in that, include The upper trolley feeding mechanism (111) includes a main shaft (2) installed inside the housing (1), a trolley seat (3) installed at the head of the housing (1), an upper trolley assembly (4) rotatably installed inside the trolley seat (3), a mounting seat (5) installed on the side of the housing (1), a cover plate (6) installed on the outer side of the mounting seat (5), an upper feeding shaft (8) rotatably installed inside the mounting seat (5), one end of the upper feeding shaft (8) being connected to the upper trolley assembly (4) via a transmission mechanism (9); a feeding crank (10) is installed on the outer periphery of the other end of the upper feeding shaft (8), a connecting rod (11) is connected to the other end of the feeding crank (10), a swinging member (12) is connected to the other end of the connecting rod (11), and a connecting rod (12) is connected to the other end of the swinging member (12). 3) The other end of the connecting rod (13) is formed with an eccentric wheel (14) for connecting with the main shaft (2) and rotating synchronously; the middle part of the swinging part (12) is provided with a rotating part (15), a rotating shaft (16) is passed through the rotating part (15), and the two ends of the rotating shaft (16) are connected with adjusting seats (17). The side of the adjusting seat (17) is rotatably connected to the mounting seat (5) through a rotating column (18). One end of the adjusting seat (17) is formed with an adjusting part (19), and an adjusting part (20) is screwed into the adjusting part (19). The cover plate (6) is provided with an adjusting through hole (21) for the adjusting part (20) to extend out. A limiting rotating part (22) is screwed into the outer periphery of the adjusting part (20), and the limiting rotating part (22) is set in the adjusting through hole (21). The lower trolley feeding mechanism (222) includes a trolley shaft (42) and a one-way transmission wheel set (43) rotatably disposed below the base (41). A lower trolley (44) is mounted on the outer periphery of the trolley shaft (42). One end of the one-way transmission wheel set (43) is connected to the trolley shaft (42) and is used to drive it to rotate synchronously. The other end of the one-way transmission wheel set (43) is connected to a connecting rod four (45). The other end of the connecting rod four (45) is connected to a connecting rod five (46). The other end of the connecting rod five (46) is mounted with a rotary adjustment component (47). An adjustment shaft (48) is formed at the eccentric part of the rotary adjustment component (47). A swing rod (49) is connected to the outer periphery of the adjustment shaft (48). The swing rod (49) is used to connect to the feeding shaft (50) and can be driven by the feeding shaft (50) to swing back and forth. The cutter clutch mechanism (333) includes a cutter drive shaft (70) rotatably disposed in the housing (1). One end of the cutter drive shaft (70) is connected to the main shaft (2) via a first linkage mechanism (71). The other end of the cutter drive shaft (70) is connected to a second linkage mechanism (72). The other end of the second linkage mechanism (72) is connected to a cutter swing member (73). The middle end of the cutter swing member (73) is rotatably connected to the housing (1). The other end of the cutter swing member (73) is provided with a locking member (74). A sliding column (75) is provided on the lower end face of the machine head of the housing (1). A cutter mounting seat is provided on the outer periphery of the sliding column (75) in a height-adjustable manner. 76), a cutter assembly (77) is installed on one side of the cutter mounting base (76), and a locking groove (78) for locking member (74) is formed on the side of the cutter mounting base (76). A mounting bracket (79) is provided on the lower end face of the housing (1). A rotating shaft (80) is rotatably provided inside the mounting bracket (79). An operating handle (81) for controlling its rotation is installed at one end of the rotating shaft (80). A separation bracket (82) is installed on the outer periphery of the rotating shaft (80). A fork (83) for driving the locking member (74) to move is formed at the lower end of the separation bracket (82) so that the locking member (74) can be engaged or disengaged from the locking groove (78).

2. The roller feeding mechanism and cutter clutch mechanism of the flat sewing machine according to claim 1, characterized in that: The separation frame (82) has a separation plate (84) installed on its side. A connecting rod (85) is installed at one end of the separation plate (84). The other end of the connecting rod (85) is hinged to the operating handle (81). A connecting plate (86) is formed at the other end of the separation plate (84). The other end of the connecting plate (86) is connected to the cutter mounting seat (76). A limit post (87) is provided on the side of the separation frame (82). A guide groove (88) and a guide groove (89) are respectively opened in the separation plate (84) for the limit post (87) to move.

3. The roller feeding mechanism and cutter clutch mechanism of the flat sewing machine according to claim 2, characterized in that: The other end of the rotating shaft (80) is respectively equipped with a drive wheel one (90) and a drive wheel two (91). The drive wheel one (90) is fixedly connected to the rotating shaft (80), and the drive wheel two (91) is rotatably sleeved on the outer circumference of the rotating shaft (80). A lever (92) is provided on one side of the drive wheel. One end of the lever (92) is rotatably connected to the mounting bracket (79). The other end of the lever (92) is provided with a snap-fit ​​part (93). One end of the lever (92) abuts against the mounting bracket (79) with a torsion spring (94) so ​​that the snap-fit ​​part (93) tends to be closer to the mounting bracket (79). The drive wheel moves to the side closer to the drive wheel. The outer periphery of the drive wheel one (90) is formed with an arc-shaped groove (95) for rotating the toggle block (92). A limiting notch (96) is opened on one side of the drive wheel one (90). The outer periphery of the drive wheel two (91) is formed with a rectangular groove (97) for the locking part (93) to be engaged. A limiting post two (98) is provided on the drive wheel two (91). The limiting post two (98) is located in the limiting notch (96) so that when the drive wheel one (90) rotates, it drives the drive wheel two (91) to rotate accordingly.

4. The roller feeding mechanism and cutter clutch mechanism of the flat sewing machine according to claim 1, characterized in that: The other end of the cutter armature (73) is formed with a mounting cylinder three (99), and the locking member (74) is movably disposed inside the mounting cylinder three (99). A push button (100) is provided at the rear end of the locking member (74), and a spring (101) is connected between the locking member (74) and the mounting cylinder three (99) to make the locking member (74) move towards the side closer to the locking groove (78); the linkage mechanism one (71) includes a front cutter crank (102) mounted on the outer periphery of one end of the cutter drive shaft (70). The other end of the front cutter crank (102) is connected to the cutter drive linkage (103), and the other end of the cutter drive linkage (103) is provided with a cutter eccentric wheel (104) for mounting on the outer periphery of the main shaft (2). The second linkage mechanism (72) includes a rear cutter crank (105) mounted on the outer periphery of the other end of the cutter drive shaft (70). The other end of the rear cutter crank (105) is connected to a cutter pull rod (106), and the other end of the cutter pull rod (106) is connected to the cutter swing member (73).

5. The roller feeding mechanism and cutter clutch mechanism of the flat sewing machine according to claim 1, characterized in that: The side of the adjusting seat (17) is formed with a rotating column (18), and the inner side of the cover plate (6) is formed with a connecting rod three (23). The other end of the connecting rod three (23) is provided with an installation cylinder one (24) for sleeved on the outer periphery of the rotating column (18). The cover plate (6) is provided with a fastening hole one (25) on its four sides, and the outer end face of the mounting seat (5) is provided with a fastening hole two.

6. The roller feeding mechanism and cutter clutch mechanism of the flat sewing machine according to claim 1, characterized in that: The transmission mechanism (9) includes an upper swing crank (27) mounted on the outer periphery of the upper feed shaft (8), the other end of the upper swing crank (27) is connected to a feed rod (28), the lower end of the feed rod (28) is connected to a lower swing crank (29), and the other end of the lower swing crank (29) is connected to an upper trolley assembly (4); the upper trolley assembly (4) includes a trolley (30) and a one-way wheel (31) disposed on its inner periphery; a bushing (32) is disposed between the outer periphery of the upper feed shaft (8) and the mounting base (5).

7. The roller feeding mechanism and cutter clutch mechanism of the flat sewing machine according to claim 1, characterized in that: A hinge shaft (51) is provided between the fourth link (45) and the fifth link (46). The other end of the fifth link (46) is provided with a mounting hole (52) for installing a rotary adjustment component (47). The outer end of the rotary adjustment component (47) is formed with an adjustment part (53). One end of the swing rod (49) is provided with a mounting hole (54) for installing an adjustment shaft (48). An adjustment groove (55) is formed on the adjustment part (53). A fastening hole (56) is provided on the side wall of the mounting hole (54).

8. The roller feeding mechanism and cutter clutch mechanism of the flat sewing machine according to claim 1, characterized in that: The unidirectional drive wheel assembly (43) includes a wheel frame (57), a drive wheel shaft (58) is provided inside the wheel frame (57), and a drive wheel (59) and a unidirectional wheel (60) for driving the drive wheel (59) to rotate in one direction are respectively installed on the outer periphery of the drive wheel shaft (58); a driven wheel (61) is provided at one end of the traction wheel shaft (42), and a drive belt (62) is connected between the driven wheel (61) and the drive wheel (59).

9. The roller feeding mechanism and cutter clutch mechanism of the flat sewing machine according to claim 1, characterized in that: One end of the connecting rod four (45) is formed with a sleeve part (63) for mounting on the outer periphery of the one-way wheel two (60); a wheel seat (64) is provided below the base (41), the wheel seat (64) is provided with the towing wheel shaft (42), and bearings (65) are provided between the two ends of the towing wheel shaft (42) and the wheel seat (64).

10. The roller feeding mechanism and cutter clutch mechanism of the flat sewing machine according to claim 1, characterized in that: The swing arm (49) has an inner mounting cylinder (66) for mounting on the outer periphery of the feed shaft (50), and the other end of the swing arm (49) has a connecting part (67) for connecting to the tooth holder seat (68).

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