Independent presser foot driving device and embroidery machine

Abstract

The utility model discloses an independent presser foot driving device which comprises a main shaft, a first cam, a second cam, an independent presser foot, a first transmission piece and a presser foot driving block, wherein the first cam and the second cam are arranged on the main shaft; the first transmission piece is provided with a first rotating fulcrum; the first transmission piece is directly or indirectly movably connected with the presser foot driving block; the first transmission part is provided with a first roller and a second roller; the first roller is in rolling fit with the outer cam face of the first cam so that the presser foot driving block can drive the independent presser foot to complete the ascending stroke, and the second roller is in rolling fit with the outer cam face of the second cam so that the presser foot driving block can drive the independent presser foot to complete the descending stroke. The utility model further discloses an embroidery machine with the independent presser foot driving device. The utility model has the beneficial effects that no extra space is occupied, the operation is stable, the vibration is small, and the noise is low.

Description

Technical Field

[0001] The utility model relates to an independent presser foot driving device and an embroidery machine, which are applied in the technical field of embroidery machines. Background Art

[0002] In the technical field of embroidery machines, there are two types of presser foot drives. One is that the presser foot is driven by the needle bar to perform reciprocating lifting motion, and the other is an independent presser foot, which is driven by an independent power source to perform reciprocating lifting motion without interfering with the reciprocating lifting motion of the needle bar.

[0003] For example, a patent application with prior art publication number CN110923976A discloses an independent presser foot drive mechanism and an embroidery machine, including a presser foot drive motor for independently driving the presser foot, and a presser foot connecting rod assembly connecting the presser foot drive motor and the presser foot drive block to complete the presser foot drive. By setting an independent presser foot drive motor and a presser foot connecting rod assembly, the presser foot action can be independently driven.

[0004] For another example, a patent application with prior art publication number CN114351362B discloses an independent presser foot driving mechanism, including an independent presser foot driver and a presser foot driving component, wherein the presser foot driving component is arranged at the front part of a machine head housing, and the independent presser foot driver is arranged outside the cavity of the machine head housing, and a power transmission reversing structure is provided in the cavity of the machine head housing for converting the rotational power of the independent presser foot driver into vertical reciprocating power to drive the presser foot driving component to vertically reciprocate, wherein one end of the power transmission reversing structure is connected to the independent presser foot driver, and the other end of the power transmission reversing structure is connected to the presser foot driving component.

[0005] The above two patent applications both separately set up an independent presser foot driver or a presser foot driving motor as a power source to drive the independent presser foot to perform lifting and reciprocating motion. Separately setting up an independent presser foot driver or a presser foot driving motor will occupy a certain amount of extra space, affecting the overall spatial layout of the embroidery machine. Utility Model Content

[0006] The technical problem to be solved by the utility model is to provide an independent presser foot driving device and an embroidery machine, which do not occupy extra space and have stable operation, small vibration and small noise.

[0007] The utility model is realized through the following technical solutions.

[0008] An independent presser foot driving device comprises a main shaft, a first cam and a second cam arranged on the main shaft, an independent presser foot, a first transmission member having a first rotating fulcrum, and a presser foot driving block which can be lifted and lowered; the first transmission member and the presser foot driving block are directly or indirectly movably connected; the first transmission member has a first roller and a second roller; the first roller and the outer cam surface of the first cam are rolled together so that the presser foot driving block drives the independent presser foot to complete an ascending stroke, and the second roller and the outer cam surface of the second cam are rolled together so that the presser foot driving block drives the independent presser foot to complete a descending stroke.

[0009] As a further improvement of the present invention, the first rotation fulcrum of the first transmission member is located below the main shaft.

[0010] As a further improvement of the present invention, the angle between the line from the center point of the main shaft to the first rotation fulcrum and the vertical plane where the central axis of the main shaft is located is not greater than 60°.

[0011] As a further improvement of the present invention, the first rotation fulcrum, the center point of the first roller, and the center point of the second roller are in a triangular position relationship.

[0012] As a further improvement of the present invention, the first roller is located on the front side of the vertical plane where the central axis of the main shaft is located, and the second roller is located on the rear side of the vertical plane where the central axis of the main shaft is located; or, the first roller is located on the rear side of the vertical plane where the central axis of the main shaft is located, and the second roller is located on the front side of the vertical plane where the central axis of the main shaft is located.

[0013] As a further improvement of the present invention, the first transmission member has a first transmission part and a second transmission part that can swing around a first rotation fulcrum, the first roller is arranged on the first transmission part, and the second roller is arranged on the second transmission part.

[0014] As a further improvement of the present invention, the first transmission part and / or the second transmission part are provided with an elastic member, and the elastic member is used to apply elastic force to the first roller and / or the second roller and make it stick to the outer cam surface of the first cam and / or the second cam.

[0015] As a further improvement of the present invention, the first transmission part and / or the second transmission part is configured as an adjustable structure so that the angle formed by the line connecting the first roller and the first rotation fulcrum and the line connecting the second roller and the first rotation fulcrum can be adjusted.

[0016] As a further improvement of the present invention, the first transmission member has a first fulcrum shaft constituting a first rotation fulcrum, and the first fulcrum shaft is a rotation shaft; the first transmission part and the second transmission part are directly or indirectly fixedly connected to the first fulcrum shaft.

[0017] As a further improvement of the utility model, the first fulcrum shaft is directly or indirectly rotatably connected to the casing of the embroidery machine.

[0018] As a further improvement of the present invention, the first transmission member has a first fulcrum shaft constituting a first rotation fulcrum, and the first fulcrum shaft is a fixed shaft, and the first transmission part and the second transmission part are rotationally connected to the first fulcrum shaft.

[0019] As a further improvement of the utility model, the first fulcrum shaft is directly or indirectly fixedly connected to the casing of the embroidery machine.

[0020] As a further improvement of the present invention, the first cam and the second cam are arranged at intervals on the main shaft; the part of the first transmission part where the first roller is arranged and the part of the second transmission part where the second roller is arranged are located between the first cam and the second cam relative to the axial position of the main shaft, the first roller is arranged on the left side or the right side of the first transmission part, and the second roller is arranged on the right side or the left side of the second transmission part.

[0021] As a further improvement of the utility model, the presser foot driving block is slidably sleeved on a vertically arranged guide rod.

[0022] As a further improvement of the present invention, the independent presser foot has a guide structure, and the guide structure is slidably connected to the needle rod.

[0023] As a further improvement of the utility model, it also includes a second transmission member, the second transmission member has a second rotation fulcrum, and the second transmission member is movably connected to the first transmission member and the presser foot driving block respectively.

[0024] As a further improvement of the present invention, the second transmission member includes a transmission member body and an eccentric member arranged on the transmission member body; the second rotation fulcrum is arranged on the eccentric member, and the eccentric member can be rotated and adjusted.

[0025] An embroidery machine comprises an independent presser foot driving device, a machine head, a beam, and a backpack structure; the independent presser foot driving device is arranged on the machine head; the machine head is mounted and fixed on one side of the beam, and the backpack structure is mounted and fixed on the other side.

[0026] Beneficial effects of the utility model:

[0027] Since the independent presser foot uses the spindle as the power source, it does not take up extra space in the casing, and eliminates the need for a separate independent presser foot driver or presser foot drive motor, which saves costs.

[0028] The first roller and the second roller always maintain rolling cooperation with the outer cam surfaces of the first cam and the second cam. Since the outer cam surface is the edge surface of the first cam / the second cam, the first roller / the second roller has sufficient supporting strength in rolling cooperation with the first roller / the second roller to avoid damage, and is more durable and has a longer service life;

[0029] The first roller and the second roller always maintain rolling cooperation with the outer cam surfaces of the first cam and the second cam, so that the first transmission member is always in a locked state, which can reduce vibration during operation, improve operation stability and reduce noise. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The following is a detailed description of the preferred implementation examples of the present invention with reference to the accompanying drawings to help understand the purpose and advantages of the present invention, wherein:

[0031] Figure 1 It is a structural schematic diagram of the head of an embroidery machine;

[0032] Figure 2 It is a plan view of the independent presser foot driving device;

[0033] Figure 3 is a schematic structural diagram of a first transmission member, a first cam, and a second cam at a viewing angle;

[0034] Figure 4 is a schematic structural diagram of the first transmission member, the first cam, and the second cam from another perspective;

[0035] Figure 5 is a schematic structural diagram of a first transmission member having an elastic member;

[0036] Figure 6 is a structural schematic diagram of a first transmission member having an adjustable structure;

[0037] Figure 7 It is a structural diagram of an embroidery machine. DETAILED DESCRIPTION

[0038] The utility model is further described in detail below based on the accompanying drawings and implementation cases.

[0039] The directional terms such as up, down, left, right, front, back, front, back, top, bottom, etc. mentioned or may be mentioned in this specification are defined relative to the structures shown in the drawings. The words "inside" and "outside" refer to the direction toward or away from the geometric center of a specific component, respectively. They are relative concepts, and therefore may change accordingly according to different locations and different usage conditions. Therefore, these or other directional terms should not be interpreted as restrictive terms.

[0040] Implementation Case 1:

[0041] An independent presser foot drive device, referring to Figure 1-Figure 4 , arranged in the head 101 of the embroidery machine, the head 101 of the embroidery machine includes a casing 102 and a needle bar frame 103. In this embodiment, the positions of the needle bar frame 103 and the casing 102 are defined as the front-to-back direction, and the positions on both sides of the casing 102 are the left-to-right direction.

[0042] In this embodiment, the embroidery machine is provided with a main shaft 1 extending in the left-right direction and passing through each housing 102. The main shaft 1 is used as a power source to drive the needle bar 31 provided on the needle bar frame 103 to perform reciprocating lifting and lowering motion, so that the rust needle at the bottom end of the needle bar 31 can embroider on the embroidery cloth.

[0043] The independent presser foot driving device of this embodiment includes a main shaft 1 , a first cam 21 , a second cam 22 , an independent presser foot 32 , a first transmission member 4 , and a presser foot driving block 5 .

[0044] The independent presser foot 32 is vertically arranged and assembled on the needle bar frame 103, and the first cam 21 and the second cam 22 are arranged on the main shaft 1 and located in the housing 102. The first transmission member 4 has a first rotation fulcrum 4a, and the first transmission member 4 can rotate in a vertical plane around the first rotation fulcrum 4a. The presser foot driving block 5 can be lifted and moved, and the first transmission member 4 and the presser foot driving block 5 are directly movably connected, and other transmission structures that movably connect the two can also be set between the first transmission member 4 and the presser foot driving block 5, that is, the first transmission member 4 and the second transmission frame are indirectly movably connected.

[0045] The first transmission member 4 has a first roller 41 and a second roller 42. The first roller 41 and the outer cam surface of the first cam 21 are in rolling cooperation, and the second roller 42 and the outer cam surface of the second cam 22 are in rolling cooperation, so that the rotation of the main shaft 1 can drive the first transmission member 4 to swing back and forth around the first rotation fulcrum 4a, and then drive the presser foot driving block 5 to move up and down reciprocatingly, and the presser foot driving block 5 drives the independent presser foot 32 to move up and down reciprocatingly, so as to press the embroidery cloth to cooperate with the embroidery of the needle bar 31. Among them, the first roller 41 and the outer cam surface of the first cam 21 are in rolling cooperation, so that the presser foot driving block 5 drives the independent presser foot 32 to complete the rising stroke, that is, under the drive of the first cam 21, the independent presser foot 32 is lifted from the lowest position pressing the embroidery cloth to the highest position, and the second roller 42 and the outer cam surface of the second cam 22 are in rolling cooperation, so that the presser foot driving block 5 drives the independent presser foot 31 to complete the descending stroke, that is, under the drive of the second cam 22, the independent presser foot 32 is lowered from the highest position to the lowest position and presses the embroidery cloth.

[0046] In this embodiment, the independent presser foot and the needle bar are both powered by the main shaft 1, and the transmission assembly drives both to perform lifting and reciprocating motions. In the prior art, an independent presser foot driver or a presser foot drive motor needs to be installed on the casing to drive the independent presser foot.

[0047] First, the installation of an independent presser foot driver or a presser foot driving motor on the casing will take up a certain amount of extra space, affecting the overall spatial layout of the embroidery machine. For example, in the prior art CN110923976A, the presser foot driving motor is installed on the right side of the casing, making it impossible for the embroidery machine of the patent to achieve a small head distance setting; for example, in the prior art CN114351362B, the independent presser foot driver is installed on the rear side of the casing, so that the casing is fixedly installed on the beam and needs to be avoided in space, which increases the difficulty of spatial layout. In the independent presser foot driving device of this implementation case, the power source is the main shaft 1, which does not take up extra space. The first transmission member 4 and the presser foot driving block 5 that realize the transmission of the main shaft 1 and the independent presser foot 32 are located in the casing 1, and also do not take up extra space.

[0048] Secondly, in this embodiment, the independent presser foot 32 and the needle bar 31 are both driven by the main shaft 1, that is, they share a power source. Compared with the prior art, a separately set independent presser foot driver or presser foot drive motor is omitted, which is more cost-effective.

[0049] Furthermore, with regard to the transmission mode of the independent presser foot 32, in the present embodiment, the independent presser foot 32 is driven to lift and reciprocate by the cooperation of the first roller 41 and the first cam 21, the second roller 42 and the second cam 22. During the reciprocating swing of the first transmission member 4, the first roller 41 and the second roller 42 always maintain rolling cooperation with the outer cam surfaces of the first cam 21 and the second cam 22. Since the outer cam surfaces are the edge surfaces of the first cam 21 / the second cam 22, they have sufficient supporting strength in rolling cooperation with the first roller 41 / the second roller 42, thereby extending the service life. The outer cam surfaces of the first cam 21 and the second cam 22 roll in cooperation with each other, so that the first transmission member 4 is always in a locked state. This embodiment can reduce vibration during operation, improve operational stability and reduce noise. Since the first roller 41 and the second roller 42 are located outside the first cam 21 and the second cam 22, the diameter setting of the first roller 41 and the second roller 42 is less restricted. Therefore, the first roller 41 and the second roller 42 can be of large size. Since the diameters of the first roller 41 and the second roller 42 are enlarged, the rotation speed of the first roller 41 and the second roller 42 can be relatively reduced, thereby reducing the hardware loss of the roller and the cam.

[0050] In this embodiment, the first rotation fulcrum 4a of the first transmission member 4 is located below the main shaft 1, which is beneficial to the spatial arrangement inside the housing 102. In theory, it is most suitable for the first rotation fulcrum 4a to be located directly below the main shaft 1 (the first rotation fulcrum 4a is located on the vertical plane f where the central axis of the main shaft 1 is located). However, due to the space in the housing 102 and to avoid interference with other components, it is difficult to set the first rotation fulcrum 4a directly below the main shaft 1. Therefore, the first rotation fulcrum 4a can be located in a position slightly forward of the main shaft 1 (the first rotation fulcrum 4a is located in front of the vertical plane f where the central axis of the main shaft 1 is located) or in a position slightly backward (located behind the vertical plane f where the central axis of the main shaft 1 is located). In general, the first rotation fulcrum 4a deviates from the angle directly below the main shaft 1 by no more than 45°, that is, the angle between the line from the center point of the main shaft 1 to the first rotation fulcrum 4a and the vertical plane where the central axis of the main shaft 1 is located is no more than 60°.

[0051] In this embodiment, the first rotation fulcrum 4a, the center point of the first roller 41, and the center point of the second roller 42 are in a triangular position relationship, that is, the structure formed by one rotation point and two force points of the first transmission member 4 forms a triangular structure, and the two force points and the rotation point in the triangular structure form a stable force transmission path. When the external force of the first cam 21 and the second cam 22 acts on the triangular structure, this triangular layout can effectively transmit the force to the support point, thereby reducing the concentration of force on the structure and increasing the stability of the structure. Since the two force points and the rotation point are in a triangular position relationship, this layout helps to evenly distribute the force and reduce deformation and damage of the structure.

[0052] In this embodiment, the first roller 41 is located at the front side of the vertical plane f where the center axis of the main shaft 1 is located, and the second roller 42 is located at the rear side of the vertical plane f where the center axis of the main shaft 1 is located, or the first roller 41 is located at the rear side of the vertical plane f where the center axis of the main shaft 1 is located, and the second roller 42 is located at the front side of the vertical plane f where the center axis of the main shaft 1 is located. As a result, during the reciprocating swing of the first transmission member 4, its center of mass swings along the front-to-back direction, so the vibration direction caused by the swing of the first transmission member 4 is along the front-to-back direction. Figure 7The head 101 of the embroidery machine is fixed on one side of the beam 104, and the other side of the beam 104 is fixedly connected to the backpack structure 105. Therefore, the head 101 of the embroidery machine has a strong anti-seismic performance in the front-to-back direction, but because the head 101 is suspended in the vertical direction, its anti-seismic performance in the up-down direction is weak. Based on the positional relationship between the first rotation fulcrum 4a, the first roller 41, and the second roller 42 relative to the main shaft 1 in this embodiment, the center of mass of the first transmission member 4 swings in the front-to-back swing direction, and the embroidery machine has good anti-seismic performance in the front-to-back direction, which can effectively weaken the vibration caused by the reciprocating swing of the first transmission member 4, thereby improving the stability of operation.

[0053] In this embodiment, the first transmission member 4 has a first transmission part 401, a second transmission part 402, and a third transmission part 403, wherein the first transmission part 401 can swing around the first rotation fulcrum 4a, and the first roller 41 is arranged on the first transmission part 401, the second transmission part 402 can swing around the first rotation fulcrum 4a, and the second roller 42 is arranged on the second transmission part 402, and the third transmission part 403 can swing around the first active fulcrum, and is directly or indirectly movably connected to the presser foot driving block 5. The first transmission part 401 serves as a force transmission structure between the first roller 41 and the first rotation fulcrum 4a, and the second transmission part 402 serves as a force transmission structure from the second roller 42 to the first rotation fulcrum 4a. The first transmission part 401, the second transmission part 402, and the third transmission part 403 can be arranged as an arm-shaped or rod-shaped structure, or can be arranged as structures of other shapes.

[0054] In this embodiment, for the first transmission member 4, the first roller 41 and the outer cam surface of the first cam 21 roll together to drive the presser foot 32 to complete the ascending stroke, that is, during the ascending process of the presser foot 32, the first transmission part 401 serves as the main force-bearing body, and the second transmission part 402 serves as the secondary force-bearing body, and the second roller 42 and the outer cam surface of the second cam 22 roll together to drive the presser foot 32 to complete the descending stroke, that is, during the descending process of the presser foot 32, the second transmission part 402 serves as the main force-bearing body, and the first transmission part 401 serves as the secondary force-bearing body. Therefore, during the reciprocating swing of the first transmission member 4, the first transmission part 401 and the second transmission part 402 bear the main force load alternately in a cycle, thereby greatly reducing the structural fatigue and improving the durability and service life.

[0055] In the first embodiment, the first transmission member 4 is provided with at least one elastic member 4A, and the elastic force exerted by the elastic member 4A acts on the first roller 41 and / or the second roller 42, so that the first roller 41 and / or the second roller 42 are attached to the corresponding outer cam surface, and the elastic force exerted by the elastic member 4A is generated when it is compressed or stretched. The elastic member 4A has two functions. The angle between the line connecting the center point of the first roller 41 to the first rotating fulcrum 4a and the line connecting the center point of the second roller 42 to the first rotating fulcrum 4a is recorded as angle α. First, when installing the first transmission member 4, compress or stretch the elastic member 4A to increase the angle α to avoid interference between the first roller 41, the second roller 42 and the first cam 21, the second cam 22. After the first transmission member 4 is installed, release the elastic member 4A and under the action of the elastic member 4A, the first roller 41 and the second roller 42 can be attached to the corresponding outer cam surface, so that the installation difficulty is reduced; secondly, by adjusting the compression degree or stretching degree of the elastic member 4A, that is, adjusting the elastic force applied by the elastic member 4A, the supporting strength of the first roller 41 and the second roller 42 on the corresponding outer cam surface can be adjusted, thereby adjusting the locking strength of the first transmission member 4 and the first cam 21 and the second cam 22.

[0056] Generally, one or two elastic members 4A are provided. If only one elastic member 4A is provided, for example Figure 5 As shown, the first transmission part 401 and the third transmission part 403 can be set as an integral structure, and the second transmission part 402 is an independent structure, so that the first transmission part 401 and the second transmission part 402 can be relatively rotated and adjusted. The two ends of the elastic member 4A are respectively connected to the second transmission part 402 and the third transmission part 403, and the elastic member 4A is in a compressed state. The two ends directly apply elastic force to the second transmission part 402 and the third transmission part 403, respectively, and then the elastic force can act on the first roller 41 and the second roller 42, so that the first roller 41 is attached to the outer cam surface of the first cam 21, and the second roller 42 is attached to the outer cam surface of the second cam 22. The elastic member 4A can also be connected to the first transmission part 401 and the second transmission part 402, and the elastic member 4A is in a stretched state. The elastic force applied by the two ends can also act on the first roller 41 and the second roller 42 in the same way, so that the first roller 41 is attached to the outer cam surface of the first cam 21, and the second roller 42 is attached to the outer cam surface of the second cam 22. If two elastic members 4A are provided, the first transmission part 401, the second transmission part 402 and the third transmission part 403 can be provided as independent structures, wherein one elastic member 4A connects the first transmission part 401 and the third transmission part 403, and the other elastic member 4A connects the second transmission part 402, and both elastic members 4A are in a compressed state, which can also achieve the same effect.

[0057] In the second embodiment, the first transmission part 401 and / or the second transmission part 402 are configured as an adjustable structure, so that the angle α formed by the line connecting the first roller 41 and the first rotation fulcrum 4a and the line connecting the second roller 42 and the rotation fulcrum can be adjusted. Figure 6 As shown, the first transmission part 401 and the third transmission part 403 are an integrated structure, and the second transmission part 402 is an independent structure. The part of the second transmission part 402 surrounding the first rotation fulcrum 4a is provided with a clamping structure 4B, and the clamping structure 4B can be locked or loosened, so that the second transmission part 402 becomes an adjustable structure. During installation, the clamping structure 4B can be loosened, and the angle α can be increased. After the first transmission member 4 is installed, the second transmission part 402 is rotated so that the second roller 42 is attached to the outer cam surface of the second cam 22, and then the clamping structure 4B is locked, which can also reduce the difficulty of installation. In addition, the first transmission part 401 can also be provided with a clamping structure 4B to make it an adjustable structure, or the first transmission part 401 and the second transmission part 402 can be set as adjustable structures.

[0058] In addition, the first embodiment and the second embodiment may be combined for application, that is, the elastic member 4A and the adjustable structure may be provided at the same time.

[0059] The first transmission member 4 can also be set as a non-adjustable structure, for example, the three can be set as an integrated structure, or the three can be set as a fixedly connected structure. In this way, the first transmission member 4 has no adjustable parts in the structure (such as the elastic member 4A, the clamping structure 4B, etc.), and the overall structure is more stable and reliable, but the installation difficulty is relatively high.

[0060] As for other structural components of the first transmission member 4, the first transmission member 4 has a first fulcrum shaft 404, which serves as the first rotation fulcrum 4a. The first fulcrum shaft 404 can be set as a fixed shaft or a rotating shaft. In the embodiment in which the first fulcrum shaft 404 is set as a rotating shaft, the first transmission part 401, the second transmission part 402, and the third transmission part 403 are directly or indirectly fixedly connected to the first fulcrum shaft 404, and the first rotating shaft reciprocates around its axis, so that the first transmission part 401 drives the first roller 41 and the second transmission part 402 drives the second roller 42 to swing back and forth around the first rotation fulcrum 4a. In this embodiment, the first fulcrum shaft 404 is directly movably connected to the housing 102 of the embroidery machine, or it can also be indirectly movably connected to the housing 102 of the embroidery machine, for example, it is movably connected to the side plate 1021 set on the side of the housing 102 or other structures connected to the housing 102.

[0061] In the embodiment where the first fulcrum shaft 404 is set as a fixed shaft, the first transmission part 401 and the second transmission part 402 are rotatably connected to the first fulcrum shaft 404, the first fulcrum shaft 404 is stationary, and the first transmission part 401, the second transmission part 402, and the third transmission part 403 can rotate around the first fulcrum shaft 404, so that the first transmission part 401 drives the first roller 41, and the second transmission part 402 drives the second roller 42 to swing back and forth around the first rotation fulcrum 4a. In this embodiment, the first fulcrum shaft 404 is directly fixedly connected to the housing 102 of the embroidery machine, or it can also be indirectly fixedly connected to the housing 102 of the embroidery machine, for example, fixedly connected to the side plate 1021 set on the side of the housing 102 or other structures connected to the housing 102.

[0062] In this embodiment, the first cam 21 and the second cam 22 are arranged at intervals on the main shaft 1, and the first transmission part 401 where the first roller 41 is arranged and the second transmission part 402 where the second roller 42 is arranged are located between the first cam 21 and the second cam 22 relative to the axial position of the main shaft 1, the first roller 41 is arranged on the left or right side of the first transmission part 401, and the second roller 42 is arranged on the right or left side of the second transmission part 402. This arrangement can avoid interference between the first transmission part 401 and the first cam 21, the second transmission part 402 and the second cam 22, and can optimize the spatial layout in the housing 102.

[0063] Regarding the setting of the presser foot drive block 5, in this embodiment, a vertical guide rod 53 is provided in the housing 102, and the presser foot drive block 5 is slidably sleeved on the guide rod 53, so that the presser foot drive block 5 can reciprocate vertically, and the straight track of the presser foot drive block 5 is more stable and reliable to cooperate with the presser foot 32, but the presser foot drive block 5 is subjected to a large force from the guide rod 53 during the lifting process, resulting in a large friction resistance, and lubricating oil is needed to reduce the friction to avoid the presser foot drive block 5 from getting stuck during the lifting. In addition, a needle bar drive block 311 is also slidably adjusted on the guide rod 53, and the needle bar drive block 311 is located above the presser foot drive block 5, and the needle bar drive block 311 is used to drive the needle bar 31 to reciprocate up and down.

[0064] As for the structural relationship between the presser foot driving block 5 and the independent presser foot 32, in this embodiment, the presser foot driving block 5 has a slot structure 5a at the position facing the independent presser foot 32, and the independent presser foot 32 is provided with a connecting component 321, and the connecting component 321 has a tongue structure 321a at the position facing the presser foot driving block 5, and the slot structure 5a and the tongue structure 321a are engaged and matched, so that the lifting and reciprocating movement of the presser foot driving block 5 can drive the independent presser foot 32 to perform lifting and reciprocating movement. The tongue structure can also be set on the presser foot driving block 5, and the slot structure can be set on the connecting component 321 of the independent presser foot 32.

[0065] In this embodiment, the independent presser foot 32 has a guide structure 321b, which is slidably connected to the needle bar 31. The guide structure 321b guides the independent presser foot 32. Since the independent presser foot 32 is slidably connected to the needle bar 31, the vibration of the independent presser foot 32 is smaller and the state is more stable when the independent presser foot 32 is lifted and slid. More specifically, the guide structure 321b is formed on the part of the connecting component 321 facing the needle bar 31, and is slidably sleeved on the needle bar 31.

[0066] The independent presser foot driving device of this embodiment also includes a second transmission member 6, which has a second rotation fulcrum 6a. The second transmission member 6 is movably connected to the third transmission part 403 of the first transmission member 4 and the presser foot driving block 5, respectively, so that the first transmission member 4 and the presser foot driving block 5 are indirectly movably connected.

[0067] In this embodiment, the second transmission member 6 includes a transmission member body 61 and an eccentric member 62 arranged on the transmission member body 61. The two ends of the transmission member body 61 can be directly and movably connected to the first transmission member 4 and the presser foot driving block 5, and can also be movably connected to the connecting rod 63 at both ends. The connecting rod 63 is movably connected to the third transmission part 403 of the first transmission member 4 and the presser foot driving block 5. The second rotation fulcrum 6a is arranged on the eccentric member 62, and the eccentric member 62 can be rotated and adjusted relative to the transmission member body 61. By adjusting the eccentric member 62, the height of the independent presser foot 32 can be further adjusted. The setting and adjustment of the eccentric member 62 can refer to the prior art CN101307532A, and a driving motor 104 is arranged on the side of the housing 102 or the side plate 1021, and the eccentric member 62 is adjusted by the driving motor 104.

[0068] Implementation Case 2:

[0069] An embroidery machine, referring to Figure 7 , including an independent presser foot driving device, a machine head 101, a beam 104, and a backpack structure 105. The independent presser foot driving device is configured on the machine head 101 as shown in Implementation Case 1. The machine head 101 is installed and fixed on one side of the beam 104, and the backpack structure 105 is installed and fixed on the other side.

[0070] Finally, it should be noted that the above implementation cases are only used to illustrate the technical solutions of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the above implementation cases, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the above implementation cases, or replace some of the technical features therein with equivalents. These modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the implementation cases of the utility model.

Claims

1. An independent presser foot driving device, characterized in that: It includes a main shaft, a first cam and a second cam arranged on the main shaft, an independent presser foot, a first transmission member with a first rotating fulcrum, and a presser foot driving block that can be lifted and moved; the first transmission member and the presser foot driving block are directly or indirectly movably connected; the first transmission member has a first roller and a second roller; the first roller and the outer cam surface of the first cam are rollingly matched so that the presser foot driving block drives the independent presser foot to complete the ascending stroke, and the second roller and the outer cam surface of the second cam are rollingly matched so that the presser foot driving block drives the independent presser foot to complete the descending stroke; the presser foot driving block has a slot structure, and the independent presser foot has a tongue structure that is engaged with the slot structure; or, the presser foot driving block has a tongue structure, and the independent presser foot has a slot structure that is engaged with the tongue structure.

2. The independent presser foot driving device according to claim 1, characterized in that: The first rotation fulcrum of the first transmission member is located below the main shaft.

3. The independent presser foot driving device according to claim 2, characterized in that: The angle between the line connecting the center point of the main shaft to the first rotation fulcrum and the vertical plane where the central axis of the main shaft is located is not greater than 60°.

4. The independent presser foot driving device according to claim 2, characterized in that: The first rotation fulcrum, the center point of the first roller, and the center point of the second roller are in a triangular position relationship.

5. The independent presser foot driving device according to claim 2 or 4, characterized in that: The first roller is located on the front side of the vertical plane where the central axis of the main shaft is located, and the second roller is located on the rear side of the vertical plane where the central axis of the main shaft is located; or, the first roller is located on the rear side of the vertical plane where the central axis of the main shaft is located, and the second roller is located on the front side of the vertical plane where the central axis of the main shaft is located.

6. The independent presser foot driving device according to claim 1, characterized in that: The first transmission member comprises a first transmission part and a second transmission part which can swing around a first rotation fulcrum, the first roller is arranged on the first transmission part, and the second roller is arranged on the second transmission part.

7. The independent presser foot driving device according to claim 6, characterized in that: The first transmission part and / or the second transmission part are provided with an elastic member, and the elastic member is used to apply elastic force to the first roller and / or the second roller and make it stick to the outer cam surface of the first cam and / or the second cam.

8. The independent presser foot driving device according to claim 6, characterized in that: The first transmission part and / or the second transmission part are configured as an adjustable structure, so that the angle formed by the line connecting the first roller and the first rotation fulcrum and the line connecting the second roller and the first rotation fulcrum can be adjusted.

9. The independent presser foot driving device according to claim 7 or 8, characterized in that: The first transmission member has a first fulcrum shaft constituting a first rotation fulcrum, and the first fulcrum shaft is a rotation shaft; the first transmission part and the second transmission part are directly or indirectly fixedly connected to the first fulcrum shaft.

10. The independent presser foot driving device according to claim 9, characterized in that: The first fulcrum shaft is directly or indirectly rotatably connected to the casing of the embroidery machine.

11. The independent presser foot driving device according to claim 7 or 8, characterized in that: The first transmission member has a first fulcrum shaft constituting a first rotation fulcrum, and the first fulcrum shaft is a fixed shaft, and the first transmission part and the second transmission part are rotationally connected to the first fulcrum shaft.

12. The independent presser foot driving device according to claim 11, characterized in that: The first fulcrum shaft is directly or indirectly fixedly connected to the casing of the embroidery machine.

13. The independent presser foot driving device according to claim 6, 7 or 8, characterized in that: The first cam and the second cam are arranged at intervals on the main shaft; the part of the first transmission part where the first roller is arranged and the part of the second transmission part where the second roller is arranged are located between the first cam and the second cam relative to the axial position of the main shaft, the first roller is arranged on the left side or the right side of the first transmission part, and the second roller is arranged on the right side or the left side of the second transmission part.

14. The independent presser foot driving device according to claim 1, characterized in that: The presser foot driving block is slidably sleeved on a vertically arranged guide rod.

15. The independent presser foot driving device according to claim 1, characterized in that: The independent presser foot has a guide structure, and the guide structure is slidably connected to the needle rod.

16. The independent presser foot driving device according to claim 1, characterized in that: It also includes a second transmission member, which has a second rotation fulcrum and is movably connected to the first transmission member and the presser foot driving block respectively.

17. The independent presser foot driving device according to claim 16, characterized in that: The second transmission member comprises a transmission member body and an eccentric member arranged on the transmission member body; the second rotation fulcrum is arranged on the eccentric member, and the eccentric member can be rotated and adjusted.

18. An embroidery machine, characterized in that: It comprises the independent presser foot driving device, machine head, beam and backpack structure as described in any one of claims 1 to 17; the independent presser foot driving device is arranged on the machine head; the machine head is mounted and fixed on one side of the beam, and the backpack structure is mounted and fixed on the other side.

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