A link mechanism for needle bar and presser foot drive

Abstract

The utility model relates to a connecting rod mechanism for needle bar and presser foot drive, including needle bar drive mechanism and presser foot drive mechanism, needle bar drive mechanism includes needle bar drive handle, needle bar drive block, is located between needle bar drive handle and needle bar drive block's needle bar three eye connecting rod and needle bar connecting rod, presser foot drive mechanism includes presser foot drive handle, presser foot drive block, presser foot three eye connecting rod, first connecting rod of connecting presser foot three eye connecting rod and presser foot drive handle, second connecting rod between connecting presser foot three eye connecting rod and presser foot drive block, needle bar three eye connecting rod and needle bar drive handle junctions are equipped with first bearing, presser foot drive handle and first connecting rod junctions are equipped with second bearing, first connecting rod and presser foot three eye connecting rod junctions are equipped with third bearing. The utility model sets up the bearing at the connecting place of needle bar and presser foot's drive rod and connecting rod etc.

Description

Technical Field

[0001] This utility model relates to the field of embroidery machine technology, and in particular to a linkage mechanism for driving a needle bar or presser foot. Background Technology

[0002] Embroidery machines typically have a needle bar drive device and a presser foot drive device. The needle bar drive device includes a needle bar drive block that cooperates with the needle bar, a needle bar drive cam, and a needle bar connecting rod assembly located between the needle bar drive block and the needle bar drive cam. The presser foot drive device includes a presser foot drive block that cooperates with the presser foot, a presser foot drive cam, and a presser foot connecting rod assembly located between the presser foot drive block and the presser foot drive cam. Both the needle bar connecting rod assembly and the presser foot connecting rod assembly include some large and small connecting rods for connecting the transmission. In the prior art, there is no bearing between the large and small connecting rods, and they are fixedly connected. When the drive cam rotates at high speed, the large and small connecting rods rotate quickly, and the friction at the connection between them is large, which makes them prone to deviation and breakage, reducing their service life. Moreover, the transmission drive is more labor-intensive, the driving force is increased, and the cost is increased. Utility Model Content

[0003] To address the problems of the prior art, this utility model provides a linkage mechanism for driving needle bar and presser foot, wherein bearings are provided between each linkage, resulting in high transmission efficiency, long service life of the linkages, and resistance to deviation and breakage.

[0004] The technical solution adopted is as follows: A linkage mechanism for driving a needle bar and a presser foot includes a needle bar driving mechanism and a presser foot driving mechanism. The needle bar driving mechanism includes a needle bar driving handle, a needle bar driving block, a needle bar three-eye connecting rod and a needle bar connecting rod disposed between the needle bar driving handle and the needle bar driving block. The presser foot driving mechanism includes a presser foot driving handle, a presser foot driving block, a presser foot three-eye connecting rod, a first connecting rod connecting the presser foot three-eye connecting rod and the presser foot driving handle, and a second connecting rod connecting the presser foot three-eye connecting rod and the presser foot driving block. A first bearing is provided at the connection between the needle bar three-eye connecting rod and the needle bar driving handle, a second bearing is provided at the connection between the presser foot driving handle and the first connecting rod, a third bearing is provided at the connection between the first connecting rod and the presser foot three-eye connecting rod, a fourth bearing is provided at the connection between the needle bar three-eye connecting rod and the needle bar connecting rod, and a fifth bearing is provided at the connection between the presser foot three-eye connecting rod and the second connecting rod.

[0005] Furthermore, one end of the needle bar three-eye connecting rod is rotatably mounted on the first pin, the other end is connected to the needle bar connecting rod, and the middle part is connected to the needle bar drive handle.

[0006] Furthermore, a sixth bearing is provided between the three-eye connecting rod of the needle bar and the first pin.

[0007] Furthermore, one end of the presser foot three-eye connecting rod is rotatably mounted on the second pin, the other end is connected to the second connecting rod, and the middle part is connected to the presser foot drive handle through the first connecting rod.

[0008] Furthermore, a seventh bearing is provided between the presser foot three-eye connecting rod and the second pin.

[0009] Furthermore, the needle bar drive handle is provided with a needle bar drive cam, which is located on the drive shaft.

[0010] Furthermore, the drive shaft is also provided with a presser foot drive cam that cooperates with the presser foot drive handle.

[0011] Compared with the prior art, the beneficial effects of this utility model are as follows: This utility model provides a linkage mechanism for driving a needle bar and a presser foot, including a needle bar driving mechanism and a presser foot driving mechanism. The needle bar driving mechanism includes a needle bar driving block for driving the needle bar to lift, a needle bar three-eye connecting rod, and a needle bar connecting rod. The presser foot driving mechanism includes a presser foot lifting driving block for driving the presser foot to lift, a presser foot driving handle, a presser foot three-eye connecting rod, a first connecting rod, and a second connecting rod.

[0012] One end of the needle bar three-eye connecting rod is connected to the needle bar drive block via the needle bar connecting rod. A fourth bearing is provided between the needle bar three-eye connecting rod and the needle bar connecting rod. The other end of the needle bar three-eye connecting rod is rotatably mounted on the first pin shaft via the sixth bearing. The middle part of the needle bar three-eye connecting rod is connected to the needle bar drive handle via the first bearing. One end of the presser foot three-eye connecting rod is connected to the presser foot drive block via the second connecting rod. A fifth bearing is provided between the presser foot three-eye connecting rod and the second connecting rod. The other end of the presser foot three-eye connecting rod is rotatably mounted on the second pin shaft via the seventh bearing. The middle part of the presser foot three-eye connecting rod is connected to the presser foot drive handle via the first connecting rod. A second bearing is provided between the presser foot drive handle and the first connecting rod. A third bearing is provided between the first connecting rod and the presser foot three-eye connecting rod. Bearings are installed at the connection points of each drive rod and connecting rod. When the drive mechanism is running at high speed, the friction between each drive rod and connecting rod is small, the movement is smoother, the required driving force is smaller, the load on the motor is reduced, the service life of each connecting rod is extended, the damage and breakage of the connecting rod are reduced, and the connecting rod is less likely to deviate and affect the drive of the needle bar and presser foot, resulting in higher transmission efficiency and accuracy. Attached Figure Description

[0013] Figure 1 This is a side view of one side of the present invention; Figure 2 This is a side view of the other side of the present invention; Figure 3 This is a schematic diagram of the needle bar drive mechanism; Figure 4 This is a schematic diagram of the presser foot drive mechanism; The components include: needle bar drive mechanism 1, needle bar drive handle 101, needle bar drive block 102, needle bar three-eye connecting rod 103, needle bar connecting rod 104, presser foot drive mechanism 2, presser foot drive handle 201, presser foot drive block 202, presser foot three-eye connecting rod 203, first connecting rod 204, second connecting rod 205, first bearing 3, second bearing 4, third bearing 5, needle bar drive cam 6, first pin 7, second pin 8, drive shaft 9, presser foot drive cam 10, fourth bearing 11, fifth bearing 12, sixth bearing 13, and seventh bearing 14. Detailed Implementation

[0014] The present invention will be further described below with reference to specific embodiments.

[0015] refer to Figure 1-4 A linkage mechanism for driving a needle bar and a presser foot includes a needle bar driving mechanism 1 and a presser foot driving mechanism 2. The needle bar driving mechanism 1 includes a needle bar driving handle 101, a needle bar driving block 102, a three-eye needle bar connecting rod 103 and a needle bar connecting rod 104 disposed between the needle bar driving handle 101 and the needle bar driving block 102. The presser foot driving mechanism 2 includes a presser foot driving handle 201, a presser foot driving block 202, a three-eye presser foot connecting rod 203, a first connecting rod 204 connecting the three-eye presser foot connecting rod 203 and the presser foot driving handle 201, and a connecting rod 204 connecting the three-eye presser foot connecting rod. The second connecting rod 205 between 203 and presser foot drive block 202; the connection between the needle bar three-eye connecting rod 103 and the needle bar drive handle 101 is provided with a first bearing 3; the connection between the presser foot drive handle 201 and the first connecting rod 204 is provided with a second bearing 4; the connection between the first connecting rod 204 and the presser foot three-eye connecting rod 203 is provided with a third bearing 5; the connection between the needle bar three-eye connecting rod 103 and the needle bar connecting rod 104 is provided with a fourth bearing 11; and the connection between the presser foot three-eye connecting rod 203 and the second connecting rod 205 is provided with a fifth bearing 12.

[0016] Incorporating bearings reduces friction at the joints of the connecting rods, preventing damage from friction during high-speed operation and reducing the risk of breakage of the connecting profiles. Bearings also allow for relative movement between the rods, making driving easier, reducing the load on the motor, increasing the efficiency of the connecting rod transmission, and ensuring smoother lifting and lowering of the needle bar and presser foot.

[0017] One end of the needle bar three-eye connecting rod 103 is rotatably mounted on the first pin 7, the other end is connected to the needle bar connecting rod 104, and the middle part is connected to the needle bar drive handle 101. A sixth bearing 13 is provided between the needle bar three-eye connecting rod 103 and the first pin to facilitate relative rotation of the needle bar three-eye connecting rod 103. The first pin 7 is fixedly connected to the machine housing.

[0018] One end of the presser foot three-eye connecting rod 203 is rotatably mounted on the second pin 8, and the other end is connected to the second connecting rod 205. The middle part is connected to the presser foot drive handle 201 through the first connecting rod. A seventh bearing 14 is provided between the presser foot three-eye connecting rod 203 and the second pin to facilitate relative rotation of the presser foot three-eye connecting rod 203. The second pin 8 is fixedly connected to the machine housing.

[0019] The needle bar drive handle 101 is provided with a needle bar drive cam 6, which is mounted on the drive shaft 9. The drive shaft 9 is also provided with a presser foot drive cam 10 that cooperates with the presser foot drive handle 201. The needle bar drive cam 6 and the presser foot drive cam 10 are coaxially driven, which can reduce the space occupied and improve efficiency.

[0020] The presser foot drive handle 201 is mounted on a rotating shaft and is rotatably connected to the rotating shaft. One end of the handle is engaged with the presser foot drive cam 10, and the other end is connected to the first connecting rod 204.

[0021] The needle bar drive cam 6 rotates, which drives the needle bar three-eyed connecting rod 203 to swing via the needle bar drive handle. The swinging of the needle bar three-eyed connecting rod drives the needle bar drive block to move up and down via the needle bar connecting rod, thereby driving the needle bar to lift. The presser foot drive cam 10 rotates, which drives the presser foot drive handle 201 to swing around the pivot axis. This swinging motion drives the presser foot three-eyed connecting rod via the first connecting rod. The presser foot three-eyed connecting rod then drives the presser foot drive block to move up and down via the second connecting rod, thereby driving the presser foot to lift.

[0022] Bearings are installed at each connection point of the drive rod and connecting rod, making it less likely for the connecting rod to deviate and affect the drive of the needle bar and presser foot, resulting in higher transmission efficiency and accuracy.

[0023] The above description is only an optional embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the inventive concept of the present utility model using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A linkage mechanism for driving a needle bar and a presser foot, comprising a needle bar driving mechanism (1) and a presser foot driving mechanism (2), wherein the needle bar driving mechanism (1) comprises a needle bar driving handle (101), a needle bar driving block (102), a needle bar three-eye connecting rod (103) disposed between the needle bar driving handle (101) and the needle bar driving block (102), and a needle bar connecting rod (104), wherein the presser foot driving mechanism (2) comprises a presser foot driving handle (201), a presser foot driving block (202), a presser foot three-eye connecting rod (203), a first connecting rod (204) connecting the presser foot three-eye connecting rod (203) and the presser foot driving handle (201), and a second connecting rod (205) connecting the presser foot three-eye connecting rod (203) and the presser foot driving block (202), characterized in that: The needle bar three-eye connecting rod (103) is provided with a first bearing (3) at the connection between the needle bar drive handle (101), the presser foot drive handle (201) is provided with a second bearing (4) at the connection between the first connecting rod (204) and the presser foot three-eye connecting rod (203), the needle bar three-eye connecting rod (103) is provided with a fourth bearing (11) at the connection between the needle bar connecting rod (103) and the needle bar connecting rod (104), and the presser foot three-eye connecting rod (203) is provided with a fifth bearing (12) at the connection between the second connecting rod (205).

2. The linkage mechanism for driving the needle bar and presser foot as described in claim 1, characterized in that: The needle bar three-eye connecting rod (103) is rotatably mounted on the first pin (7) at one end, connected to the needle bar connecting rod (104) at the other end, and connected to the needle bar drive handle (101) in the middle.

3. The linkage mechanism for driving the needle bar and presser foot as described in claim 2, characterized in that: A sixth bearing (13) is provided between the needle bar three-eye connecting rod and the first pin.

4. The linkage mechanism for driving the needle bar and presser foot as described in claim 1, characterized in that: The presser foot three-eye connecting rod (203) is rotatably mounted on the second pin (8) at one end, and connected to the second connecting rod (205) at the other end. The middle part is connected to the presser foot drive handle (201) through the first connecting rod.

5. The linkage mechanism for driving the needle bar and presser foot as described in claim 4, characterized in that: A seventh bearing (14) is provided between the presser foot three-eye connecting rod and the second pin.

6. The linkage mechanism for driving the needle bar and presser foot as described in claim 1, characterized in that: The needle bar drive handle (101) is provided with a needle bar drive cam (6), which is located on the drive shaft (9).

7. The linkage mechanism for driving the needle bar and presser foot as described in claim 6, characterized in that: The drive shaft (9) is also provided with a presser foot drive cam (10) that cooperates with the presser foot drive handle (201).

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