CN117802708A - Independent presser foot driving device and embroidery machine - Google Patents

Abstract

The invention 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 with a first rotating fulcrum and a presser foot driving block capable of moving up and down, wherein the first cam and the second cam are arranged on the main shaft; the first transmission piece is directly or indirectly movably connected with the presser foot driving block; the first transmission member is provided with a first roller and a second roller; the first roller is matched with the outer cam surface of the first cam in a rolling way, so that the presser foot driving block drives the independent presser foot to complete the ascending stroke, and the second roller is matched with the outer cam surface of the second cam in a rolling way, so that the presser foot driving block drives the independent presser foot to complete the descending stroke. The invention also discloses an embroidery machine with the independent presser foot driving device. The invention has the advantages of no extra occupation of space, stable operation, small vibration and low noise.

Description

Independent presser foot driving device and embroidery machine

Technical Field

The invention relates to an independent presser foot driving device and an embroidery machine, which are applied to the technical field of embroidery machines.

Background

In the technical field of embroidery machines, the driving of the presser foot is divided into two types, one type is that the needle bar drives the presser foot to reciprocate, the other type is that the independent presser foot is driven by an independent power source to reciprocate, and the reciprocating elevating movement of the needle bar is not interfered with each other.

For example, patent application publication No. CN110923976a discloses an independent presser foot driving mechanism and an embroidery machine, which comprises a presser foot driving motor for independently driving a presser foot, and a presser foot connecting rod assembly for connecting the presser foot driving motor with a presser foot driving block to complete the presser foot driving, and by setting the independent presser foot driving motor and the presser foot connecting rod assembly, the independent driving of the presser foot can be realized.

For example, the prior art publication CN114351362B discloses an independent presser foot driving mechanism, which comprises an independent presser foot driver and a presser foot driving member, the presser foot driving member is disposed at the front part of the machine head casing, the independent presser foot driver is disposed outside the cavity of the machine head casing, a power transmission reversing structure for converting the rotation power of the independent presser foot driver into vertical reciprocating power to drive the presser foot driving member to vertically reciprocate is disposed in the cavity of the machine head casing, one end of the power transmission reversing structure is connected with the independent presser foot driver, and the other end of the power transmission reversing structure is connected with the presser foot driving member.

The two patent applications are used for driving the independent presser foot to lift and reciprocate by independently arranging the independent presser foot driver or the presser foot driving motor as a power source. The independent presser foot driver or the presser foot driving motor additionally occupies a certain space, which affects the overall space layout of the embroidery machine.

Disclosure of Invention

The invention aims to solve the technical problems of providing an independent presser foot driving device and an embroidery machine, which do not occupy extra space, and have stable operation, small vibration and low noise.

The invention is realized by the following technical scheme.

An independent presser foot driving device comprises a main shaft, a first cam, a second cam, an independent presser foot, a first transmission piece with a first rotating fulcrum and a presser foot driving block capable of moving up and down, wherein the first cam and the second cam are arranged on the main shaft; the first transmission piece is directly or indirectly movably connected with the presser foot driving block; the first transmission member is provided with a first roller and a second roller; the first roller is matched with the outer cam surface of the first cam in a rolling way, so that the presser foot driving block drives the independent presser foot to complete the ascending stroke, and the second roller is matched with the outer cam surface of the second cam in a rolling way, so that the presser foot driving block drives the independent presser foot to complete the descending stroke.

As a further development of the invention, the first pivot point of the first transmission element is located below the spindle.

As a further improvement of the invention, the included angle between the connecting line from the central point of the main shaft to the first rotating pivot and the vertical plane where the central axis of the main shaft is located is not more than 60 degrees.

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 positional relationship.

As a further improvement of the invention, the first roller is positioned at the front side of the vertical plane where the central axis of the main shaft is positioned, and the second roller is positioned at the rear side of the vertical plane where the central axis of the main shaft is positioned; or the first roller is positioned at the rear side of the vertical plane where the central axis of the main shaft is positioned, and the second roller is positioned at the front side of the vertical plane where the central axis of the main shaft is positioned.

As a further development of the invention, the first transmission part has a first transmission part and a second transmission part which can be pivoted about a first pivot point, the first roller being arranged on the first transmission part and the second roller being arranged on the second transmission part.

As a further improvement of the invention, the first transmission part or/and the second transmission part is/are provided with an elastic piece, and the elastic piece is used for applying elastic force to the first roller or/and the second roller and enabling the elastic piece to be attached to the outer cam surface of the first cam or/and the second cam.

As a further improvement of the invention, the first transmission part or/and the second transmission part is/are provided with an adjustable structure, so that the size of an included angle formed by the connecting line of the first roller and the first rotation pivot and the connecting line of the second roller and the first rotation pivot can be adjusted.

As a further improvement of the present invention, the first transmission member has a first fulcrum shaft that constitutes 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 pivot shaft.

As a further development of the invention, the first pivot shaft is directly or indirectly rotatably connected to the housing of the embroidery machine.

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 portion and the second transmission portion are rotatably connected to the first fulcrum shaft.

As a further development of the invention, the first pivot axis is fixedly connected directly or indirectly to the housing of the embroidery machine.

As a further improvement of the present invention, the first cam and the second cam are disposed at intervals on the spindle; 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 direction 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.

As a further improvement of the invention, the presser foot driving block is sleeved on the guide rod which is arranged vertically in a sliding way.

As a further development of the invention, the individual presser foot has a guide structure which is slidingly connected to the needle bar.

As a further improvement of the invention, the presser foot driving device further comprises a second transmission piece, wherein the second transmission piece is provided with a second rotation pivot, and the second transmission piece is movably connected with the first transmission piece and the presser foot driving block respectively.

As a further improvement of the invention, the second transmission member comprises a transmission member body, an eccentric member provided on the transmission member body; the second rotating fulcrum is arranged on an eccentric part, and the eccentric part can be adjusted in a rotating way.

An embroidery machine comprises the independent presser foot driving device, a machine head, a girder and a knapsack structure; the independent presser foot driving device is arranged on the machine head; one side surface of the girder is provided with and fixed with the machine head, and the other side surface is provided with and fixed with the knapsack structure.

The invention has the beneficial effects that:

because the independent presser foot takes the main shaft as a power source, the independent presser foot does not occupy the space of the machine shell additionally, and an independent presser foot driver or a presser foot driving motor which is arranged independently is omitted, so that the cost is saved;

the first roller and the second roller are always in rolling fit with the outer cam surfaces of the first cam and the second cam, and the outer cam surfaces are edge surfaces of the first cam/the second cam, so that the first roller and the second roller have sufficient supporting strength in rolling fit with the first roller/the second roller, avoid damage, are more durable and have longer service life;

the first roller and the second roller are always in rolling fit with the outer cam surfaces of the first cam and the second cam, so that the first transmission piece is always in a locked state, vibration can be reduced in the running process, running stability is improved, and noise is reduced.

Drawings

Preferred embodiments of the present invention will be described in detail below with reference to the attached drawings, to facilitate understanding of the objects and advantages of the present invention, wherein:

FIG. 1 is a schematic structural view of a head of an embroidery machine;

FIG. 2 is a plan view of the independent presser foot drive arrangement;

FIG. 3 is a schematic view of the first driving member, the first cam, and the second cam from one perspective;

FIG. 4 is a schematic view of the first driving member, the first cam, and the second cam from another perspective;

FIG. 5 is a schematic view of a first driving member having an elastic member;

FIG. 6 is a schematic view of a first transmission member having an adjustable configuration;

fig. 7 is a schematic structural view of an embroidery machine.

Detailed Description

The invention is described in further detail below with reference to the drawings and the examples.

The terms of orientation such as up, down, left, right, front, rear, front, back, top, bottom, etc. mentioned or possible in this specification are defined with respect to the configurations shown in the drawings, and the terms "inner" and "outer" refer to the relative concepts of the terms toward or away from the geometric center of a particular component, respectively, and thus may be changed accordingly depending on the location and use state of the component. These and other directional terms should not be construed as limiting terms.

Embodiment case 1:

referring to fig. 1 to 4, the independent presser foot driving device is provided in a machine head 101 of an embroidery machine, the machine head 101 of the embroidery machine comprises a machine housing 102 and a needle bar frame 103, in this embodiment, positions of the needle bar frame 103 and the machine housing 102 are defined as front-rear directions, and positions of both sides of the machine housing 102 are defined as left-right directions.

In the present embodiment, the embroidery machine is provided with a main shaft 1 extending in the left-right direction and penetrating each housing 102, the main shaft 1 being used as a power source for driving the needle bar 31 provided on the needle bar frame 103 to reciprocate up-down so that the rust needle at the bottom end of the needle bar 31 can embroider on the embroidery cloth.

The independent presser foot driving device of the present 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.

Wherein the independent presser foot 32 is vertically arranged and fitted on the needle bar frame 103, and the first cam 21 and the second cam 22 are arranged on the spindle 1 and located within the housing 102. The first transmission member 4 has a first rotation fulcrum 4a, and the first transmission member 4 is rotatable in a vertical plane about the first rotation fulcrum 4a. The presser foot driving block 5 can move up and down, the first transmission piece 4 is directly movably connected with the presser foot driving block 5, and other transmission structures for movably connecting the first transmission piece 4 with the presser foot driving block 5 can be arranged between the first transmission piece 4 and the presser foot driving block 5, namely, the first transmission piece 4 is indirectly movably connected with the second transmission frame.

The first transmission member 4 is provided with a first roller 41 and a second roller 42, the first roller 41 is in rolling fit with the outer cam surface of the first cam 21, the second roller 42 is in rolling fit with the outer cam surface of the second cam 22, so that the rotation of the main shaft 1 can drive the first transmission member 4 to swing reciprocally around the first rotation pivot 4a, and then drive the presser foot driving block 5 to move reciprocally, and the presser foot driving block 5 drives the independent presser foot 32 to move reciprocally in a lifting manner, so that embroidery cloth can be pressed to match with embroidery of the needle bar 31. The first roller 41 and the outer cam surface of the first cam 21 are in rolling fit, so that the presser foot driving block 5 drives the independent presser foot 32 to complete the ascending stroke, namely, under the driving of the first cam 21, the independent presser foot 32 is lifted to the highest position from the lowest position for pressing embroidery cloth, and the second roller 42 and the outer cam surface of the second cam 22 are in rolling fit, so that the presser foot driving block 5 drives the independent presser foot 31 to complete the descending stroke, namely, under the driving of the second cam 22, the independent presser foot 32 is lifted to the lowest position from the highest position and presses the embroidery cloth.

In this embodiment, the independent presser foot and the needle bar are driven to move up and down by the main shaft 1 as a power source through the transmission component, and in the prior art, an independent presser foot driver or a presser foot driving motor is required to be installed on the casing to drive the independent presser foot.

Firstly, the independent presser foot driver or the presser foot driving motor is arranged on the machine shell, which additionally occupies a certain space and affects the whole space layout scheme 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, so that the embroidery machine of this patent cannot realize the small-head distance setting; for example, in the prior art CN114351362B, the independent presser foot driver is mounted on the rear side of the chassis, so that the chassis is fixedly mounted on the girder to avoid space, and the difficulty of space layout is increased. In the independent presser foot driving device of the embodiment, the power source is that the main shaft 1 does not occupy extra space, and the first transmission member 4 and the presser foot driving block 5 for realizing transmission of the main shaft 1 and the independent presser foot 32 are positioned in the casing 1, so that the power source does not occupy extra space.

Secondly, in the present embodiment, the independent presser foot 32 and the needle bar 31 are driven by the main shaft 1, i.e. share a power source, which saves a separate presser foot driver or a presser foot driving motor compared with the prior art, and saves more cost.

Moreover, for the transmission mode of the independent presser foot 32, in the present embodiment, the first roller 41 and the first cam 21, the second roller 42 and the second cam 22 cooperate to drive the independent presser foot 32 to reciprocate, and the first transmission member 4 always keeps rolling cooperation with the outer cam surfaces of the first cam 21 and the second cam 22 during the reciprocating swinging process, and the outer cam surfaces are edge surfaces of the first cam 21/the second cam 22, so that the rolling cooperation with the first roller 41/the second roller 42 has enough supporting strength, thereby prolonging the service life; because the first transmission member 4 always keeps rolling fit with the outer cam surfaces of the first cam 21 and the second cam 22 in the reciprocating swing process, the first transmission member 4 is always in a locked state, vibration can be reduced in the operation process, the operation stability is improved, and noise is reduced in the embodiment; 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 limited, and therefore, the first roller 41 and the second roller 42 can be selected to be large-sized, and since the diameters of the first roller 41 and the second roller 42 are enlarged, the rotation speeds of the first roller 41 and the second roller 42 can be relatively reduced, and thus, the hardware loss of the rollers and the cams can be reduced.

In the present embodiment, the first rotation fulcrum 4a of the first transmission member 4 is located below the spindle 1, which is advantageous for spatial arrangement inside the casing 102. In theory, it is most preferable that the first pivot point 4a is located directly below the spindle 1 (the first pivot point 4a is located on the vertical plane f where the central axis of the spindle 1 is located), but the first pivot point 4a is limited by the space in the housing 102 and is not interfered with other parts, and therefore, the first pivot point 4a is difficult to be located directly below the spindle 1, and thus the first pivot point 4a may be located at a position directly ahead of the spindle 1 (the first pivot point 4a is located at the front side of the vertical plane f where the central axis of the spindle 1 is located) or at a position directly behind (the rear side of the vertical plane f where the central axis of the spindle 1 is located). In general, the angle of the first rotation pivot 4a deviating from the position right below the spindle 1 is not more than 45 °, i.e. the included angle between the line from the center point of the spindle 1 to the first rotation pivot 4a and the vertical plane where the central axis of the spindle 1 is located is not more than 60 °.

In this embodiment, the first pivot 4a, the center point of the first roller 41, and the center point of the second roller 42 are in a triangle positional relationship, that is, a triangle structure is formed by one pivot point of the first transmission member 4 and two stress points, and the two stress points and the pivot point in the triangle structure form a stable force transmission path. Because the two stress points and the rotating point are in a triangular position relationship, the layout is favorable for uniformly distributing stress and reducing deformation and damage of the structure.

In this embodiment, the first roller 41 is located at the front side of the vertical plane f where the central axis of the spindle 1 is located, the second roller 42 is located at the rear side of the vertical plane f where the central axis of the spindle 1 is located, or the first roller 41 is located at the rear side of the vertical plane f where the central axis of the spindle 1 is located, and the second roller 42 is located at the front side of the vertical plane f where the central axis of the spindle 1 is located. Therefore, the center of mass of the first transmission member 4 swings along the front-back direction in the reciprocating swing process, so that the vibration direction caused by the swing of the first transmission member 4 is along the front-back direction, and referring to fig. 7, the machine head 101 of the embroidery machine is fixedly arranged on one side surface of the girder 104, and the other side surface of the girder 104 is fixedly connected with the backpack structure 105, so that the machine head 101 of the embroidery machine has stronger vibration resistance in the front-back direction, and has weaker vibration resistance in the upper-lower direction because the machine head 101 is in a suspended state in the vertical direction. Based on the positional relationship of the first rotation pivot 4a, the first roller 41 and the second roller 42 relative to the main shaft 1 in the present embodiment, the center of mass of the first transmission member 4 swings in the forward and backward swinging direction, and the vibration caused by the reciprocating swing of the first transmission member 4 can be effectively weakened when the embroidery machine has good vibration resistance in the forward and backward directions, so that the running stability can be improved.

In the present embodiment, the first transmission member 4 has a first transmission portion 401, a second transmission portion 402, and a third transmission portion 403, wherein the first transmission portion 401 is swingable about the first rotation fulcrum 4a, and the first roller 41 is provided on the first transmission portion 401, the second transmission portion 402 is swingable about the first rotation fulcrum 4a, and the second roller 42 is provided on the second transmission portion 402, and the third transmission portion 403 is swingable about the first driving fulcrum, and is directly or indirectly movably connected to the presser foot driving block 5. The first transmission portion 401 serves as a force transmission structure between the first roller 41 to the first rotation fulcrum 4a, and the second transmission portion 402 serves as a force transmission structure between the second roller 42 to the first rotation fulcrum 4a. The first transmission portion 401, the second transmission portion 402, and the third transmission portion 403 may be provided in an arm-like or rod-like structure, or may be provided in a structure having another shape.

In this embodiment, for the first transmission member 4, the first roller 41 and the outer cam surface of the first cam 21 are engaged in a rolling manner to drive the presser foot 32 to complete the lifting stroke, that is, in the lifting process of the presser foot 32, the first transmission portion 401 serves as a primary stress body, the second transmission portion 402 serves as a secondary stress body, and the second roller 42 and the outer cam surface of the second cam 22 are engaged in a rolling manner to drive the presser foot 32 to complete the lowering stroke, that is, in the lifting process of the presser foot 32, the second transmission portion 402 serves as a primary stress body, and the first transmission portion 401 serves as a secondary stress body. Therefore, during the reciprocating swing of the first transmission member 4, the first transmission portion 401 and the second transmission portion 402 cyclically and alternately bear the main stress load, so that the structural fatigue degree can be greatly reduced, and the durability and the service life are improved.

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 or/and the second roller 42 such that the first roller 41 or/and the second roller 42 is/are stuck to the corresponding outer cam surface, and the elastic force exerted by the elastic member 4A is generated in a state in which it is compressed or stretched. Setting the elastic piece 4A to have two functions, namely, recording an included angle alpha between a connecting line from the central point of the first roller 41 to the first rotating pivot 4A and a connecting line from the central point of the second roller 42 to the first rotating pivot 4A, firstly, compressing or stretching the elastic piece 4A to increase the included angle alpha when the first transmission piece 4 is installed so as to avoid interference between the first roller 41, the second roller 42, the first cam 21 and the second cam 22, loosening the elastic piece 4A after the first transmission piece 4 is installed, and enabling the first roller 41 and the second roller 42 to be attached to corresponding outer cam surfaces under the action of the elastic piece 4A, so that the installation difficulty is reduced; secondly, by adjusting the compression degree or the extension degree of the elastic member 4A, that is, adjusting the magnitude of the elastic force applied by the elastic member 4A, the supporting forces of the first roller 41 and the second roller 42 on the corresponding outer cam surfaces can be adjusted, so that the locking forces of the first transmission member 4 and the first cam 21 and the second cam 22 can be adjusted.

In general, if one or two elastic members 4A are provided, for example, as shown in fig. 5, the first transmission portion 401 and the third transmission portion 403 may be integrally formed, and the second transmission portion 402 may be independently formed, so that the first transmission portion 401 and the second transmission portion 402 may be relatively rotatably adjusted. The two ends of the elastic member 4A are respectively connected with the second transmission part 402 and the third transmission part 403, the elastic member 4A is in a compressed state, and the two ends of the elastic member respectively apply elastic force to the second transmission part 402 and the third transmission part 403 directly, so that the elastic force can act on the first roller 41 and the second roller 42, and 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 may be connected to the first transmission portion 401 and the second transmission portion 402, and the elastic member 4A may be in a stretched state, and the elastic force applied to both ends of the elastic member may also act on the first roller 41 and the second roller 42 in the same manner, 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 the number of the elastic members 4A is two, the first transmission portion 401, the second transmission portion 402 and the third transmission portion 403 may be all configured as independent structures, where one elastic member 4A is connected to the first transmission portion 401 and the third transmission portion 403, and the other elastic member 4A is connected to the second transmission portion 402, and both the two elastic members 4A are in a compressed state, so that the same effect can be achieved.

In the second embodiment, the first transmission portion 401 and/or the second transmission portion 402 are/is configured in an adjustable structure, so that the angle α formed by the connection line between the first roller 41 and the first rotation pivot point 4a and the connection line between the second roller 42 and the rotation pivot point can be adjusted. As shown in fig. 6, the first transmission portion 401 and the third transmission portion 403 are in an integral structure, the second transmission portion 402 is in an independent structure, a holding structure 4B is provided on a portion of the second transmission portion 402 surrounding the first rotation pivot 4a, and the holding structure 4B can be locked or unlocked, so that the second transmission portion 402 is in an adjustable structure. The clamping structure 4B can be loosened during installation, the included angle alpha is increased, after the first transmission piece 4 is installed, the second transmission part 402 is rotated to enable the second roller 42 to be attached to the outer cam surface of the second cam 22, and then the clamping structure 4B is locked, so that the installation difficulty can be reduced. The first transmission portion 401 may be provided with the clasping structure 4B so as to be adjustable, or the first transmission portion 401 and the second transmission portion 402 may be both provided with adjustable structures.

Furthermore, the first embodiment and the second embodiment may be applied in combination, i.e. with the elastic member 4A and the adjustable structure being provided at the same time.

The first transmission member 4 may be configured as an unadjustable structure, for example, an integral structure of the three members, or a structure of the three members that are fixedly connected, so that the first transmission member 4 has no adjustable portion (such as an elastic member 4A, a clasping structure 4B, etc.) in structure, and is more stable and reliable in overall structure, but has relatively high installation difficulty.

For other structural components of the first transmission member 4, the first transmission member 4 has a first fulcrum shaft 404, and the first fulcrum shaft 404 serves as the first rotation fulcrum 4a. The first fulcrum shaft 404 may be provided as a fixed shaft or a rotating shaft. In the embodiment in which the first pivot shaft 404 is provided as a rotation shaft, the first transmission portion 401, the second transmission portion 402, and the third transmission portion 403 are directly or indirectly fixedly connected to the first pivot shaft 404, and the first rotation shaft reciprocally rotates about the central axis thereof, so that the first transmission portion 401 drives the first roller 41, and the second transmission portion 402 drives the second roller 42 to reciprocally oscillate about the first rotation pivot 4a. In this embodiment, the first pivot shaft 404 is directly movably connected to the housing 102 of the embroidery machine, or may be indirectly movably connected to the housing 102 of the embroidery machine, for example, movably connected to a side plate 1021 provided on a side of the housing 102 or other structure connected to the housing 102.

In the embodiment where the first pivot shaft 404 is configured as a fixed shaft, the first transmission portion 401 and the second transmission portion 402 are rotatably connected to the first pivot shaft 404, the first pivot shaft 404 is stationary, and the first transmission portion 401, the second transmission portion 402 and the third transmission portion 403 can rotate around the first pivot shaft 404, so that the first transmission portion 401 drives the first roller 41 and the second transmission portion 402 drives the second roller 42 to swing reciprocally around the first rotation pivot 4a. In this embodiment, the first fulcrum shaft 404 is directly fixedly connected to the casing 102 of the embroidery machine, or may be indirectly fixedly connected to the casing 102 of the embroidery machine, for example, fixedly connected to a side plate 1021 provided on a side surface of the casing 102 or other structures connected to the casing 102.

In the present embodiment, the first cam 21 and the second cam 22 are disposed at intervals on the main shaft 1, the portion of the first transmission portion 401 where the first roller 41 is disposed, and the portion of the second transmission portion 402 where the second roller 42 is disposed are located between the first cam 21 and the second cam 22 with respect to the position in the axial direction of the main shaft 1, the first roller 41 is disposed on the left or right side of the first transmission portion 401, and the second roller 42 is disposed on the right or left side of the second transmission portion 402. By this arrangement, interference between the first transmission portion 401 and the first cam 21, interference between the second transmission portion 402 and the second cam 22 can be avoided, and the spatial layout in the housing 102 can be optimized.

For the setting of presser foot drive piece 5, in this embodiment, be provided with vertical guide bar 53 in the casing 102, presser foot drive piece 5 sliding sleeve connects on guide bar 53 for presser foot drive piece 5 can vertical reciprocating motion, and the straight line orbit of presser foot drive piece 5 cooperates presser foot 32 more reliable and stable, but presser foot drive piece 5 receives the effort of guide bar 53 great in the lift process and leads to frictional resistance great, needs lubricating oil to reduce frictional force in order to avoid the condition that the presser foot drive piece 5 takes place to block when lifting. In addition, the guide rod 53 is also slidably provided with a needle bar driving block 311, the needle bar driving block 311 is located above the presser foot driving block 5, and the needle bar driving block 311 is used for driving the needle bar 31 to reciprocate up and down.

For the structural relationship between the presser foot driving block 5 and the independent presser foot 32, in this embodiment, the part of the presser foot driving block 5 facing the independent presser foot 32 is provided with a clamping groove structure 5a, the independent presser foot 32 is provided with a connecting part 321, the part of the connecting part 321 facing the presser foot driving block 5 is provided with a clamping tongue structure 321a, and the clamping groove structure 5a and the clamping tongue structure 321a are in clamping fit, so that the lifting and reciprocating motion of the presser foot driving block 5 can drive the independent presser foot 32 to perform lifting and reciprocating motion. The latch structure may be provided on the presser foot driving block 5, and the catch groove structure may be provided on the connecting member 321 of the independent presser foot 32.

In this embodiment, the independent presser foot 32 has a guiding structure 321b, the guiding structure 321b is slidably connected to the needle bar 31, and the guiding structure 321b plays a guiding role on the independent presser foot 32, and the sliding connection on the needle bar 31 makes the lifting and sliding of the independent presser foot 32 less vibration and smoother. More specifically, the guide structure 321b is formed on a portion of the connecting member 321 facing the needle bar 31, and is slidably coupled to the needle bar 31.

The independent presser foot driving device of this embodiment further includes a second transmission member 6, where the second transmission member 6 has a second rotation pivot 6a, and the second transmission member 6 is movably connected with the third transmission portion 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 complete indirect movable connection.

In this embodiment, the second transmission member 6 includes a transmission member body 61 and an eccentric member 62 disposed on the transmission member body 61, where two ends of the transmission member body 61 may be directly movably connected to the first transmission member 4 and the presser foot driving block 5, or two ends may be movably connected to a connecting rod 63, and the connecting rod 63 is movably connected to the third transmission portion 403 of the first transmission member 4 and the presser foot driving block 5. The second rotation fulcrum 6a is provided on the eccentric member 62, and the eccentric member 62 is rotatably adjustable with respect to the transmission body 61, and the height of the independent presser foot 32 can be further adjusted by adjusting the eccentric member 62. The eccentric member 62 may be provided and adjusted by providing a driving motor 104 on a side portion of the cabinet 102 or the side panel 1021, and adjusting the eccentric member 62 by the driving motor 104, referring to the related art CN101307532 a.

Embodiment case 2:

referring to fig. 7, the embroidery machine includes an independent presser foot driving device, a head 101, a girder 104, and a knapsack structure 105, wherein the independent presser foot driving device is disposed on the head 101 as shown in embodiment 1, and one side surface of the girder 104 is provided with the fixed head 101, and the other side surface is provided with the fixed knapsack structure 105.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme recorded in each embodiment can be modified or part of technical features in the technical scheme can be replaced equivalently; such modifications and substitutions do not depart from the spirit of the invention.

Claims (19)

1. An independent presser foot driving device is characterized by comprising a main shaft, a first cam, a second cam, an independent presser foot, a first transmission piece with a first rotating fulcrum and a presser foot driving block capable of moving up and down, wherein the first cam and the second cam are arranged on the main shaft; the first transmission piece is directly or indirectly movably connected with the presser foot driving block; the first transmission member is provided with a first roller and a second roller; the first roller is matched with the outer cam surface of the first cam in a rolling way, so that the presser foot driving block drives the independent presser foot to complete the ascending stroke, and the second roller is matched with the outer cam surface of the second cam in a rolling way, so that the presser foot driving block drives the independent presser foot to complete the descending stroke.

2. The independent presser foot drive arrangement of claim 1 wherein said first pivot point of said first transmission member is located below said spindle.

3. The independent presser foot drive arrangement of claim 2 wherein the angle between the line from the center point of the spindle to the first pivot point and the vertical plane of the central axis of the spindle is no greater than 60 °.

4. The independent presser foot drive arrangement of claim 2 wherein said first pivot point, said first roller center point, and said second roller center point are in a triangular positional relationship.

5. The independent presser foot drive arrangement of claim 2 or 4 wherein said first roller is located on a front side of a vertical plane in which a central axis of the spindle is located and said second roller is located on a rear side of a vertical plane in which a central axis of the spindle is located; or the first roller is positioned at the rear side of the vertical plane where the central axis of the main shaft is positioned, and the second roller is positioned at the front side of the vertical plane where the central axis of the main shaft is positioned.

6. The independent presser foot drive arrangement of claim 1 wherein said first transmission member has a first transmission portion and a second transmission portion swingable about a first pivot point, said first roller being disposed on the first transmission portion and said second roller being disposed on the second transmission portion.

7. The independent presser foot drive arrangement according to claim 6, wherein said first transmission portion or/and said second transmission portion is provided with an elastic member for applying an elastic force to the first roller or/and the second roller and causing it to abut against an outer cam surface of said first cam or/and said second cam.

8. The independent presser foot drive arrangement of claim 6 wherein the first transmission portion or/and the second transmission portion are provided as adjustable structures such that the angle formed by the line connecting the first roller and the first pivot point and the line connecting the second roller and the first pivot point is adjustable.

9. The independent presser foot drive arrangement according to claim 7 or 8, wherein said first transmission member has a first fulcrum shaft constituting a first fulcrum of rotation, and said 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 pivot shaft.

10. The independent presser foot drive arrangement of claim 9 wherein said first fulcrum shaft is directly or indirectly rotatably connected to the housing of the embroidery machine.

11. The independent presser foot drive arrangement of claim 7 or 8 wherein said first transmission member has a first fulcrum shaft that forms a first fulcrum of rotation, and said first fulcrum shaft is a fixed shaft, said first transmission portion, said second transmission portion being rotatably connected to said first fulcrum shaft.

12. The independent presser foot drive arrangement of claim 11 wherein said first fulcrum shaft is fixedly attached directly or indirectly to the housing of the embroidery machine.

13. The independent presser foot drive arrangement of claim 6 or 7 or 8 wherein said first cam and said second cam are spaced apart on said spindle; 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 direction 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 drive arrangement of claim 1 wherein said presser foot drive block is slidably received on a vertically disposed guide bar.

15. The independent presser foot drive arrangement of claim 1 wherein said independent presser foot has a guide structure slidably attached to the needle bar.

16. The independent presser foot drive arrangement of claim 1 wherein the presser foot drive block has a detent structure, the independent presser foot having a catch structure snap-fit with the detent structure; or, the presser foot driving block is provided with a clamping tongue structure, and the independent presser foot is provided with a clamping groove structure in clamping fit with the clamping tongue structure.

17. The independent presser foot drive arrangement of claim 1 further comprising a second transmission member having a second pivot point, said second transmission member being movably coupled to the first transmission member and the presser foot drive block, respectively.

18. The independent presser foot drive arrangement of claim 17 wherein said second transmission member comprises a transmission member body, an eccentric member disposed on the transmission member body; the second rotating fulcrum is arranged on an eccentric part, and the eccentric part can be adjusted in a rotating way.

19. An embroidery machine comprising the independent presser foot drive, head, girder, backpack structure of any one of claims 1-18; the independent presser foot driving device is arranged on the machine head; one side surface of the girder is provided with and fixed with the machine head, and the other side surface is provided with and fixed with the knapsack structure.