CN205223566U - But presser foot hoist mechanism - Google Patents

Abstract

The utility model discloses a lifting mechanism for the presser foot. One end of the main shaft of the machine head is installed inside the machine head, an eccentric wheel is arranged in the middle of the main shaft of the machine head, and a connecting rod is fixedly arranged on the eccentric wheel. The long sliding holes are connected; the cylinder is installed on the front side of the machine head through the cylinder fixing block, the cylinder rod is vertically downward, the top of the cylinder rod is fixedly installed on the cylinder connecting block, and the limit block is fixed on the cylinder rod; the new The connecting plate is provided with a long sliding hole, one end is connected with the cylinder connection block through the long sliding hole, and the other end is connected with the outer side of the notch of the connecting plate for the lower connecting plate and the joint of the curved swing rod to pass through. The mechanism has a simple structure and can smoothly sew materials with uneven thickness without stopping the machine. It is very convenient and practical, and at the same time reduces the vibration of the machine head and improves the sewing quality.

Description

Presser foot lifting mechanism

technical field

The utility model relates to the technical field of full-automatic sewing machines, in particular to a lifting mechanism for a presser foot.

Background technique

At present, the movement mode of the presser foot of the automatic sewing machine head is through the installation of an eccentric mechanism on the main shaft of the machine head to realize the swing and directly transmit it to the presser foot. When sewing, the presser foot swings directly through the rotation of the main shaft of the machine head, so that the swing of the presser foot is relatively large. , affect the vibration of the machine, and also affect the sewing quality.

Contents of the invention

In order to overcome the deficiencies of the above-mentioned prior art, the utility model provides a mechanism for lifting the presser foot, which can raise the height of the presser foot through a cylinder and change the position of a fulcrum of the four-bar linkage mechanism, so that it will not affect the loading and unloading of processing materials, and can also Reduce the swinging range of the presser foot, reduce the vibration of the machine head at the same time, improve the sewing quality, and do not interfere with the loading and unloading of processing materials.

The technical solution adopted in the utility model is: presser foot lifting mechanism, including head spindle, eccentric wheel, connecting rod, swing rod, presser foot drive shaft, presser foot drive shaft base, machine head, cylinder, compression spring column , upper swing rod, Dalian plate, lower Dalian plate, presser foot rod clamp block, presser foot rod, lower connecting plate, pressure spring, new connecting plate, cylinder connecting block, cylinder fixing block, limit block, bent swing rod and sliding Groove; one end of the main shaft of the machine head is installed inside the machine head, the middle part of the main shaft of the machine head is provided with an eccentric wheel, the eccentric wheel is fixedly provided with a connecting rod, and the end of the connecting rod is connected with the long sliding hole in the swing rod; the described The drive shaft of the presser foot is installed on the side of the machine head through the base of the drive shaft of the presser foot. One side is connected with the swing rod through the installation and fixing hole on the swing rod, and the other side is connected with the upper swing rod through the installation and fixing hole on the upper swing rod. connected; the described Dalian plate, the curved swing rod and the lower Dalian plate form a four-bar linkage mechanism, the curved swing rod is L-shaped, one end is hinged with the Dalian plate, and the corner of the middle part of the curved swing rod is hinged with the lower Dalian plate, The other end is hinged with the lower connecting plate, and the other end of the Dalian plate is hinged with the upper swing rod; the cylinder is installed on the front side of the machine head through the cylinder fixing block, the cylinder rod is vertically downward, and the top of the cylinder rod is fixed on the cylinder connecting block On the upper side, the limit block is fixed on the cylinder rod; the new connecting plate is provided with a long sliding hole, one end is connected with the cylinder connecting block through the long sliding hole, and the other end is connected with the lower connecting plate of the Dalian plate and the curved swing rod Connected through the outside of the gap.

The clamping block of the presser foot bar is hinged with the lower connecting plate, and the clamping block of the presser foot bar is provided with a mounting hole for fastening connection with the presser foot bar; the clamping block of the presser foot bar is provided with a slider and is installed inside the machine head Sliding up and down in the vertical chute;

The main shaft of the machine head is axially parallel to the drive shaft of the presser foot.

The lower Dalian plate is Y-shaped, one end of the lower Dalian plate is hinged to the shell of the machine head, the hinge point is located on the underside of the presser foot drive shaft base, and the other end is provided with a U-shaped gap for the pressure spring column to pass through. Two gaps are juxtaposed for the gap through which the joint of the lower connecting plate and the bent swing rod passes.

The inside of the compression spring is installed through the compression spring column, and one end of the two ends of the compression spring is against the inside of the shell of the machine head, and the other end is against the U-shaped notch of the lower Dalian plate.

The pressure spring column is connected with the presser foot rod at the installation and fixing hole of the presser foot rod clamp block, and the pressure spring column and the axis center of the presser foot rod are on the same straight line.

Compared with the prior art, the beneficial effect of the utility model is that the presser foot lifting mechanism has a simple structure, and can smoothly sew sewing materials with uneven thickness without stopping the machine, which is very convenient and practical, and at the same time reduces the The machine head vibrates to improve the sewing quality. When the transmission spindle moves for one cycle, the needle bar also moves for one cycle, that is, every time the needle bar moves, the presser foot bar will also move synchronously, so as to avoid the phenomenon of fabric surface wrinkles when the machine head and the cloth surface move relative to each other, ensuring Excellent embroidery quality.

Description of drawings

Figure 1 is a three-dimensional schematic diagram of the rear side of the lifting mechanism of the presser foot;

Fig. 2 The perspective view of the front side of the lifting mechanism of the presser foot;

Figure 3 is a three-dimensional assembly schematic diagram of the front side of the presser foot lifting mechanism.

1. Machine head spindle 2. Eccentric wheel 3. Connecting rod 4. Swing rod 5. Presser foot drive shaft 6. Presser foot drive shaft base 7. Machine head 8. Cylinder 9. Compression spring column 10. Upper swing rod 11. Dalian plate 12. Lower Dalian plate 13. Presser foot rod clamp block 14. Presser foot rod 15. Lower connecting plate 16. Pressure spring 17. New connecting plate 18. Cylinder connecting block 19. Cylinder fixing block 20. Limiting block 21. Curved pendulum bar 22. chute.

detailed description

The utility model is further described below in conjunction with the accompanying drawings: the presser foot can be lifted, including the head spindle 1, the eccentric wheel 2, the connecting rod 3, the swing rod 4, the presser foot drive shaft 5, the presser foot drive shaft base 6, the machine head 7. Cylinder 8, pressure spring column 9, upper swing rod 10, Dalian plate 11, lower Dalian plate 12, presser rod clamp block 13, presser rod 14, lower connecting plate 15, pressure spring 16, new connecting plate 17, Cylinder connecting block 18, cylinder fixing block 19, limit block 20, curved swing rod 21 and chute 22; one end of the main axis of the machine head 1 is installed inside the machine head 7, and the middle part of the machine head main shaft 1 is provided with an eccentric wheel 2 , the eccentric wheel 2 is fixed with a connecting rod 3, and the end of the connecting rod 3 is connected with the long sliding hole in the swing rod 4; the presser foot drive shaft 5 is installed on the side of the machine head 7 through the presser foot drive shaft base 6 One side is connected with the swing rod 4 through the installation and fixing hole on the swing rod 4, and the other side is connected with the upper swing rod 10 through the installation and fixing hole on the upper swing rod 10; the Dalian plate 11, the bending pendulum The rod 21 and the lower Dalian plate 12 form a four-bar linkage mechanism. The curved swing rod 21 is L-shaped, and one end is hinged with the Dalian plate 11. The plate 15 is hinged, and the other end of the Dalian plate 11 is hinged with the upper swing rod 10; the cylinder 8 is installed on the front side of the machine head 7 through the cylinder fixing block 19, the cylinder rod is vertically downward, and the top of the cylinder rod is fixedly installed on the cylinder connection. On the block 18, the limit block 20 is fixed on the cylinder rod; the new connecting plate 17 is provided with a long slide hole, one end is connected with the cylinder connecting block 18 through the long slide hole, and the other end is connected with the connecting plate of the Dalian plate 11 15 is connected with the outside of the notch that bends swing bar 20 joints and passes through.

The presser bar clamp 13 is hinged with the lower connecting plate 15, the presser bar clamp 13 is provided with an installation fixing hole and the presser bar 14 is fastened and connected; the presser bar clamp 13 is provided with a slide block and Installed in the vertical chute 22 inside the machine head 7 to slide up and down;

The head spindle 1 is axially parallel to the drive shaft 5 of the presser foot.

The lower Dalian plate 11 is Y-shaped, one end of the lower Dalian plate 12 is hinged to the shell of the machine head 7, the hinge point is located at the lower side of the presser foot drive shaft base 6, and the other end is provided with a spring column 9 for passing through. The U-shaped notch of the U-shaped notch and the notch passing through for the connection of the lower connecting plate 15 and the curved swing bar 21, the two notches are juxtaposed.

The inside of described stage clip 16 runs through and is installed on the stage clip post 9, and one end of two ends of stage clip 16 abuts against the shell inside of machine head 7, and the other end abuts against the U-shaped notch of lower Dalian plate 11.

The pressure spring column 9 is connected with the presser foot bar 14 at the installation and fixing hole place on the presser bar clamp block 13, and the compression spring column 9 and the presser foot bar 14 axis centers are on the same straight line.

The drive of the presser foot is to drive the eccentric wheel 2 through the main shaft 1 of the machine head, and the connecting rod 3 fixed on the eccentric wheel 2 realizes driving the swing rod 4 to swing when the eccentric wheel 2 rotates, and the swing action is transmitted through the presser foot drive shaft 5, The upper swing link 10 is made to swing, and then the presser foot bar 14 fixed on the presser bar clamp block 13 is driven by the Dalian plate 11, the bent swing bar 21, the lower Dalian plate 12 and the lower connecting plate 15 to realize the presser foot to move up and down. Presser foot rod 14 lifting is to drive new connecting plate 17 and cylinder connecting block 18 to realize by cylinder 8. Stage clip 16 is housed on the presser bar, and new connecting plate 15 has long groove, and when cylinder 8 descends to lower limit, presser bar 14 can realize upward movement by overcoming the resistance of stage clip 16, can be like this when sewing again. The presser foot has a certain degree of elasticity when the sewing is uneven.

Through the above description of the preferred embodiment, it will be more helpful for the public to understand the utility model, but the specific embodiment given by the applicant cannot and should not be regarded as a limitation to the technical solution of the utility model, any components or Changes in the definition of technical features and/or formal but not substantive changes to the overall structure should be regarded as the scope of protection defined by the technical solution of the present invention.

Claims (6)

1. presser feet can hoisting mechanism, comprise head spindle, eccentric wheel, connecting rod, fork, presser feet driving shaft, presser feet driving shaft pedestal, head, cylinder, stage clip post, upper pendulum bar, large connecting plate, lower large connecting plate, presser bar fixture block, presser bar, lower plate, stage clip, new connecting plate, cylinder contiguous block, cylinder fixed block, limited block, curved fork and chute, it is characterized in that: described head spindle one end is arranged on head inside, eccentric wheel is provided with in the middle part of head spindle, eccentric wheel is installed with connecting rod, and the long sliding hole in connecting rod end and fork is connected; Described presser feet driving shaft is arranged on head side by presser feet driving shaft pedestal, side be connected by the installation fixing hole on fork and fork, opposite side is connected by the installation fixing hole on upper pendulum bar and upper pendulum bar; Described large connecting plate, curved fork and lower large connecting plate composition quadric chain, curved fork is L-type, and one end and large connecting plate are hinged, and the corner in the middle part of curved fork and lower large connecting plate are hinged, the other end and lower plate are hinged, and the large connecting plate other end and upper pendulum bar are hinged; Described cylinder is arranged on front side of head by cylinder fixed block, and vertically downward, cylinder rod top is fixedly mounted on cylinder contiguous block cylinder rod, and cylinder rod is fixed with limited block; Described new connecting plate is provided with long sliding hole, and one end is connected by long sliding hole and cylinder contiguous block, and the outside of the gap supplying lower plate and curved fork connection place to pass through of the other end and large connecting plate is connected.

2. presser feet according to claim 1 can hoisting mechanism, it is characterized in that: described presser bar fixture block and lower plate are hinged, and presser bar fixture block is provided with installs fixing hole and presser bar tight joint; Presser bar fixture block is provided with slide block and slides up and down cooperation in the vertical chute being arranged on head inside.

3. presser feet according to claim 1 can hoisting mechanism, it is characterized in that: described head spindle is axially parallel with presser feet driving shaft.

4. presser feet according to claim 1 can hoisting mechanism, it is characterized in that: described lower large connecting plate is Y type, lower one end of large connecting plate and the shell of head are hinged, pin joint is positioned on the downside of presser feet driving shaft pedestal, the other end is provided with the U-shaped gap that can pass through for stage clip post and the gap passed through for lower plate and curved fork connection place, and two gap are arranged side by side.

5. presser feet according to claim 1 can hoisting mechanism, it is characterized in that: described stage clip inside is run through and is arranged on stage clip post, and one end, two ends of stage clip and the enclosure of head offset, and the U-shaped gap of the other end and lower large connecting plate offsets.

6. presser feet according to claim 1 can hoisting mechanism, it is characterized in that: described stage clip post and the presser bar installation fixing hole place on presser bar fixture block is connected, and stage clip post and presser bar axle center are on the same line.