Independent presser foot independent lifting and clutch structure and embroidery machine

Abstract

The utility model discloses an independent presser foot independent lifting and clutching structure and an embroidery machine, and relates to the embroidery machine technology, the independent presser foot independent lifting and clutching structure comprises an independent presser foot independent lifting mechanism and an independent presser foot clutching mechanism, the independent presser foot independent lifting mechanism is used for lifting a presser foot to a first height, and the independent presser foot clutching mechanism is used for clutching the presser foot. The first height is higher than the highest point of the working stroke of the presser foot, and the independent presser foot lifting mechanism comprises a presser foot lifting motor and a presser foot lifting component driven by the presser foot lifting motor; the independent presser foot clutch mechanism comprises a presser foot positioning block which is connected with the presser foot and ascends and descends synchronously with the presser foot, and a presser foot clutch disc which is rotationally installed through a clutch pin, and the presser foot clutch disc has a first position corresponding to the working state of the presser foot and has a second position corresponding to the non-working state of the presser foot. According to the utility model, the presser foot can be lifted to a non-working height, and after the presser foot is lifted to the non-working height, the presser foot can be kept at the non-working height.

Description

TECHNICAL FIELD

[0001] The utility model belongs to embroidery equipment technical field, concretely relates to embroidery machine.

BACKGROUND

[0002] In the embroidery machine technical field, the drive of the presser foot is divided into two kinds, one is combined with the needle bar movement, and the presser foot is driven by the needle bar to move up and down reciprocatingly, and the other is an independent presser foot, which is driven by an independent power source to move up and down reciprocatingly, and the up and down reciprocating movements of the independent presser foot and the needle bar do not interfere with each other.

[0003] Referring to the Chinese invention patent application with the publication number CN117802708A, an independent presser foot driving device is disclosed, which comprises 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 rotation fulcrum, and a presser foot driving block that can move up and down; 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 in rolling fit, so that the presser foot driving block drives the independent presser foot to complete the upward stroke, and the second roller and the outer cam surface of the second cam are in rolling fit, so that the presser foot driving block drives the independent presser foot to complete the downward stroke.

[0004] In the prior art, the independent presser foot driving device only lifts the presser foot to the highest height of the presser foot working stroke, and there is a risk of interfering with the embroidery cloth during color changing and when the presser foot is in a non-working state. If an independent presser foot independent lifting mechanism is designed, the presser foot can be lifted to a non-working height, but the drive source of the independent presser foot independent lifting mechanism also has other functions and cannot always remain in a working state, so it is impossible to keep the presser foot at a non-working height all the time.

UTILITARY MODEL CONTENT

[0005] In view of the deficiencies in the prior art, the technical problem to be solved by the utility model is to provide an independent presser foot independent lifting and clutching structure and an embroidery machine, which can lift the presser foot to a non-working height, and can keep the presser foot at a non-working height after lifting the presser foot to the non-working height.

[0006] To solve the above technical problems, the utility model adopts the following technical solutions:

[0007] Firstly, an independent presser independent lifting and clutching structure is provided, comprising an independent presser independent lifting mechanism and an independent presser clutching mechanism, the independent presser independent lifting mechanism is used for lifting the presser to a first height, the first height is higher than the highest point of the working stroke of the presser, the independent presser independent lifting mechanism comprises a presser lifting motor and a presser lifting component driven by the presser lifting motor, the presser lifting component is provided with a lifting part supporting below the presser driving block in the lifting process, the lifting part has a avoiding state away from below the presser driving block in the working process of the presser;

[0008] The independent presser clutching mechanism comprises a presser positioning block connected with the presser and synchronously lifting and falling with the presser and a presser clutching sheet rotatably installed through a clutching pin, the presser clutching sheet has a first position corresponding to the working state of the presser and a second position corresponding to the non-working state of the presser, the presser clutching sheet has a locking part, the locking part is locked with the presser positioning block when the presser clutching sheet is in the second position and is unlocked with the presser positioning block when the presser clutching sheet is in the first position.

[0009] Preferably, the presser lifting component comprises a presser lifting connecting rod and a guide, the presser lifting connecting rod moves along the guide.

[0010] Preferably, the presser lifting connecting rod comprises a first presser lifting connecting rod and a second presser lifting connecting rod, the lifting part is arranged at the first end of the first presser lifting connecting rod, the second end of the first presser lifting connecting rod is hingedly connected with the first end of the second presser lifting connecting rod, and the first presser lifting connecting rod is provided with a guide part guidingly matched with the guide.

[0011] Preferably, the guide is provided with a guide groove extending upward and downward, and the guide part ascends and descends along the guide groove; and / or, the guide part is provided with a guide roller.

[0012] Preferably, the second end of the second presser lifting connecting rod is provided with a transmission sleeve, the transmission sleeve is rotatably supported on a rotating shaft, and a transmission structure is arranged between the transmission sleeve and the presser lifting motor.

[0013] Preferably, the presser clutching sheet is rotatably installed through the clutching pin, the presser clutching sheet has a first angle corresponding to the first position and a second angle corresponding to the second position, and the presser clutching sheet is driven to rotate by a clutching driving component.

[0014] Preferably, the clutching driving component comprises a clutching spring, the clutching spring makes the presser clutching sheet have a tendency to rotate from the second angle to the first angle.

[0015] Preferably, the clutching driving component comprises a needle bar lower dead point, the presser clutching sheet has a rotation stopping part, and the needle bar lower dead point cooperates with the rotation stopping part to make the presser clutching sheet be in the second angle.

[0016] Preferably, the presser foot clutch plate comprises a vertical segment and an oblique segment extending obliquely upward from a top end of the vertical segment to one side thereof, the oblique segment is connected with the clutch pin, a bottom end of the oblique segment extends to the other side of the vertical segment and forms a rotation-stopping part, a side recess is arranged on a lower part of the vertical segment on one side thereof, and the locking part is arranged on a bottom side of the side recess.

[0017] In addition, the embroidery machine also comprises the independent presser foot driving device.

[0018] The technical scheme has the following technical effects:

[0019] The independent presser foot independent lifting mechanism comprises a presser foot lifting motor and a presser foot lifting component driven by the presser foot lifting motor, the presser foot lifting component is provided with a lifting part which is supported below the presser foot driving block during lifting, so as to lift the presser foot to a position higher than the highest point of the working stroke of the presser foot, thereby avoiding the risk of interference of the presser foot with the embroidery cloth during color changing and non-working state of the presser foot; the lifting part has a avoiding state of leaving below the presser foot driving block during working of the presser foot, so as not to affect the normal working of the presser foot.

[0020] The independent presser foot clutch mechanism comprises a presser foot positioning block connected with the presser foot and synchronously lifted and descended with the presser foot, and a presser foot clutch plate which can relatively move relative to the presser foot positioning block when being driven, the presser foot clutch plate has a first position corresponding to the working state of the presser foot and a second position corresponding to the non-working state of the presser foot, the presser foot clutch plate has a locking part, the locking part is locked with the presser foot positioning block when the presser foot clutch plate is in the second position, and the locking part is unlocked with the presser foot positioning block when the presser foot clutch plate is in the first position. In this way, after the independent presser foot independent lifting mechanism lifts the presser foot to the non-working height, the locking part is locked with the presser foot positioning block when the presser foot clutch plate is in the second position, so as to keep the presser foot at the non-working height, and during working of the presser foot, the presser foot clutch plate is in the first position and is unlocked with the presser foot positioning block, thereby releasing the action on the presser foot.

[0021] The features and advantages of the present application will be described in detail in the following specific embodiments and drawings. BRIEF DESCRIPTION OF DRAWINGS

[0022] The present application will be further described in conjunction with the drawings as follows:

[0023] Figure 1 is a schematic view of a head structure of the embroidery machine in the present application;

[0024] Figure 2Is the side view of the machine head (not showing the machine head shell) of the embroidery machine in the utility model;

[0025] Figure 3 Is the structure schematic view of the conjugate cam connecting rod mechanism in the utility model;

[0026] Figure 4 Is the structure schematic view of the independent presser foot independent lifting mechanism lifting the independent presser foot to the first height state in the utility model;

[0027] Figure 5 Is the structure schematic view of the independent presser foot independent lifting mechanism lifting the independent presser foot to the first height state in the utility model;

[0028] Figure 6 Is the structure schematic view of the independent presser foot independent lifting mechanism lifting the independent presser foot to the first height state in the utility model;

[0029] Figure 7 Is the structure schematic view of the independent presser foot independent lifting mechanism lifting the independent presser foot to the first height state in the utility model;

[0030] Figure 8 Is Figure 7 The partial structure schematic view in the utility model;

[0031] Figure 9 Is the relative relationship structure schematic view between the independent presser foot independent lifting mechanism and the conjugate cam connecting rod mechanism when the independent presser foot independent lifting mechanism lifts the independent presser foot to the first height state in the utility model;

[0032] Figure 10 Is the structure schematic view of the independent presser foot independent lifting mechanism and the independent presser foot not acting state in the utility model;

[0033] Figure 11 Is Figure 10 The partial structure schematic view in the utility model;

[0034] Figure 12 Is the relative relationship structure schematic view between the independent presser foot independent lifting mechanism and the conjugate cam connecting rod mechanism when the independent presser foot independent lifting mechanism and the independent presser foot not acting state in the utility model;

[0035] Figure 13 Is the relative relationship structure schematic view between the independent presser foot independent lifting mechanism and the conjugate cam connecting rod mechanism when the independent presser foot independent lifting mechanism and the independent presser foot not acting state in the utility model;

[0036] Figure 14 Is the structure schematic view of the independent presser foot clutch mechanism in the utility model;

[0037] Figure 15This is a schematic diagram of the independent pressure foot clutch mechanism in this utility model;

[0038] Reference numerals: 1. Conjugate cam linkage mechanism; 11. Conjugate cam; 11. Inner cam surface; 111. Outer cam surface; 112. Conjugate link; B12. First roller; 121. Conjugate link; A13. Second roller; 131. Inner sleeve; 132. First conjugate link pin; 14. Intermediate link; 15. Presser foot drive link; 16. Third roller; 161. Independent presser foot lifting mechanism 2. First presser foot lifting link; 21. Lifting part; 211. Guide roller; 212. Hinge groove; 213. Second presser foot lifting link; 22. Linkage part; 221. Transmission sleeve; 222. Transmission boss; 223. Limiting groove; 224. Limiting pin; 225. Guide member; 23. Guide groove; 231. Rotating shaft; 24. First... Shaft end 241, second shaft end 242, second conjugate connecting rod pin 243, driven pulley 25, end plate 251, annular groove 252, transmission pin 253, fixing screw 254, presser foot lifting motor 26, independent presser foot clutch mechanism 3, presser foot clutch plate 31, vertical section 311, oblique section 312, anti-rotation part 313, locking part 314, side recess 315, clutch pin 32, machine head housing 4, needle bar frame 5, needle bar 51, embroidery needle 511, presser foot 52, presser foot body 521, presser foot drive block 53, presser foot drive part 531, presser foot positioning block 532, presser foot spring 54, needle bar lower stop point 55, top pin 551, transverse slide rail mechanism 6, needle bar drive device 7.

Detailed Implementation Methods

[0039] The technical solutions of the present utility model will be explained and described below with reference to the accompanying drawings. However, the following embodiments are only preferred embodiments of the present utility model and not all of them. Other embodiments obtained by those skilled in the art based on the embodiments in the implementation methods without creative effort are all within the protection scope of the present utility model.

[0040] Those skilled in the art will understand that, without conflict, the features in the following embodiments and implementations can be combined with each other.

[0041] The terminology used in this invention is for the purpose of describing particular embodiments only and is not intended to limit the invention. For example, terms such as "upper," "lower," "front," "rear," and "lateral," which indicate orientation or positional relationship, are based solely on the orientation or positional relationship shown in the accompanying drawings and are used only for the convenience of describing the invention and simplifying the description. They do not indicate or imply that the device / component referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as limiting the invention.

[0042] In the utility model, unless another definite provision and limitation, the terms "mount", "connect", "fix" and so on should do the broad sense understanding, for example, can be fixed connection, also can be detachable connection, or integrally connect, can be mechanical connection, also can be electrical connection, can be direct connection, also can be indirectly connected through the intermediate medium, can be the intercommunication of two elements. For the ordinary skilled person in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0043] In the utility model, unless another definite provision and limitation, the first feature is "on" or "under" the second feature can include that the first and second features are in direct contact, or the first and second features are not in direct contact but are in contact through another feature between them. Moreover, the first feature "on", "above" and "above" the second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "under", "below" and "below" the second feature includes that the first feature is directly below and obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0044] In addition, the terms "first", "second" and the like are only for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first", "second" can explicitly or implicitly include at least one of the features.

[0045] As shown in Figures 1 to 15 The embroidery machine is provided with at least one head, and the head comprises a head shell 4 and a needle bar support 5 arranged on the front side of the head shell, and a transverse sliding rail mechanism 6 is arranged between the needle bar support 5 and the head shell 4. In the embodiment, the relative direction between the needle bar support 5 and the head shell 4 is defined as the front-rear direction, and the moving direction of the needle bar support 5 is defined as the transverse direction, or also called the left-right direction. The embroidery machine is provided with a main shaft extending in the transverse direction and penetrating through each head shell, and the main shaft is used as a power source to drive the needle bar 51 arranged on the needle bar support to perform reciprocating lifting movement, so that the thorn needle at the bottom of the needle bar can perform embroidery on the cloth. In addition, when color changing is needed, the needle bar support 5 slides transversely along the transverse sliding rail mechanism 6, and in this process, the needle bar and the presser foot originally used for embroidery need to be lifted to a certain height away from the embroidery cloth.

[0046] The needle bar 51 is installed on the needle bar frame 5, the needle bar 51 is provided with a lower stop point 55, the bottom of the needle bar 51 is provided with a needle 511, the presser foot 52 is installed on the needle bar 51, the bottom of the presser foot 52 is provided with a presser foot body 521, the presser foot is connected with a presser foot driving block 53 and a presser foot spring 54, the presser foot driving block 53 is movably connected with the needle bar 51, when the presser foot driving block 53 drives the presser foot to rise, the presser foot spring 54 is extruded upwards, and when the presser foot driving block 53 descends, the presser foot spring 54 returns to the original position. In addition, the machine head comprises a needle bar driving device 7 for driving the needle bar, and an independent presser foot driving device for driving the presser foot 52.

[0047] As shown in Figure 3 In the present embodiment, the independent presser foot driving device is provided with a conjugate cam connecting rod mechanism 1, the conjugate cam connecting rod mechanism 1 comprises a conjugate cam 11 installed on the main shaft, a conjugate connecting rod assembly driven by the conjugate cam, the conjugate cam 11 is provided with an inner cam surface 111 and an outer cam surface 112; the conjugate connecting rod assembly is provided with a first transmission part, a second transmission part and a third transmission part, the first transmission part is matched with the inner cam surface, and the second transmission part is matched with the outer cam surface. And the first transmission part and the second transmission part always act on the inner cam surface and the outer cam surface of the conjugate cam, so that the relative position of the conjugate connecting rod assembly can be kept. In addition, the third transmission part is used for driving the presser foot driving block to rise and descend.

[0048] The conjugate connecting rod assembly comprises a conjugate connecting rod, the conjugate connecting rod is rotatably connected with a first conjugate connecting rod pin 14, the first conjugate connecting rod pin 14 is arranged below the main shaft, the first transmission part and the second transmission part are arranged on the conjugate connecting rod, and the first conjugate connecting rod pin 14 is installed on the machine head shell 4.

[0049] The conjugate cam connecting rod mechanism described above, the outer cam surface is matched with the second transmission part, so that the presser foot driving block drives the independent presser foot to complete the rising stroke; the inner cam surface is matched with the first transmission part, so that the presser foot driving block drives the independent presser foot to complete the descending stroke, or the opposite setting; compared with the prior art, only one conjugate cam needs to be arranged, thereby solving the problem of the increase of the axial space caused by the simultaneous arrangement of the first cam and the second cam in the prior art.

[0050] Specifically, the conjugate connecting rod assembly includes a conjugate connecting rod A13 and a conjugate connecting rod B12. The conjugate connecting rod A13 is provided with an inner sleeve 132 sleeved on a first conjugate connecting rod pin 14. The conjugate connecting rod B12 is fixed by a hoop to form a whole with the inner sleeve 132. In addition, a bearing is arranged between the inner sleeve 132 and the first conjugate connecting rod pin 14. The conjugate connecting rod A13 and the conjugate connecting rod B12 are separately arranged and connected by the hoop because the conjugate connecting rod A13 and the conjugate connecting rod B12 need to ensure the relative position relationship with other parts of the conjugate cam connecting rod mechanism. Even if the conjugate connecting rod A13 and the conjugate connecting rod B12 are assembled with the related parts, the hoop bolt can still be loosened to adjust the relative position between the conjugate connecting rod A13 and the conjugate connecting rod B12, so as to ensure the relative position relationship between the conjugate connecting rod A13 and the conjugate connecting rod B12 and other parts of the conjugate cam connecting rod mechanism.

[0051] In order to reduce wear and impact in transmission, the first transmission part is provided with a first roller 121, and the second transmission part is provided with a second roller 131. The first roller 121 is arranged on the conjugate connecting rod B12, and a first roller shaft is fixed by a hoop. A bearing can be arranged between the first roller body and the first roller shaft. The second roller 131 is arranged on the conjugate connecting rod A13, and a second roller shaft is fixed by a hoop. A bearing can be arranged between the second roller body and the second roller shaft.

[0052] Further, the conjugate connecting rod assembly further includes a presser foot driving connecting rod 16 rotatably connected with a second conjugate connecting rod pin. The third transmission part is arranged at a second end of the presser foot driving connecting rod.

[0053] In the embodiment, the third transmission part is arranged below a presser foot driving block 53, and the third transmission part is provided with a third roller 161. The presser foot driving block 53 is provided with a presser foot driving part 531 protruding upward above the third roller 161. The bottom surface of the presser foot driving part 531 cooperates with the third roller 161. When the third roller 161 on the presser foot driving connecting rod 16 is lifted upward, the presser foot driving block 53 is lifted. When the third roller 161 on the presser foot driving connecting rod 16 is lowered, the presser foot is lowered under the action of a presser foot spring 54 because the presser foot driving connecting rod 16 no longer acts on the presser foot driving block 53. That is, the lifting of the presser foot relies on the action of the conjugate connecting rod mechanism, but the lowering of the presser foot mainly relies on the action of the presser foot spring. Of course, the presser foot driving connecting rod 16 can be connected with a return torsion spring to ensure better return.

[0054] Further, the conjugate connecting rod assembly further includes an intermediate connecting rod 15. Two ends of the intermediate connecting rod 15 are respectively connected with the conjugate connecting rod A13 and a first end of the presser foot driving connecting rod 16.

[0055] In this embodiment, the conjugate link A13 is provided with a triangular link frame, meaning the lateral projection of the link frame is triangular. The lateral projections of the first transmission part, the first conjugate link pin, and the connection point with the intermediate link are respectively located at the three corners of the lateral projection triangle of the link frame. In this way, within a limited space, the first transmission part, the first conjugate link pin, and the connection point with the intermediate link are staggered, preventing interference between them. Furthermore, in the horizontal projection, the conjugate link B12, the intermediate link 15, and the pressure foot drive link 16 are all located on the same side of the conjugate link A13, i.e., on the same lateral side, forming a compact layout in the lateral space and avoiding an increase in axial space.

[0056] In some embodiments, the presser foot drive link 16 is a V-shaped link with a first side and a second side, and the fulcrum connecting to the second conjugate link pin is located at the junction of the first and second sides. Preferably, the first side is shorter than the second side, wherein the first side is connected to the intermediate link 15, and the third transmission part is located on the second side. Since the presser foot drive link 16 rotates perpendicular to the horizontal plane, designing it as a V-shaped link can save space in the front-rear direction.

[0057] The presser foot's working stroke refers to the reciprocating motion of the presser foot between its lowest and highest working strokes during embroidery. The lowest working stroke is when the presser foot is pressed against the fabric, holding it in place so the needle can move and embroider. At the highest working stroke, the presser foot is lifted off the fabric, allowing the fabric to move with the embroidery frame in preparation for subsequent embroidery work.

[0058] In existing technology, the independent presser foot drive device only raises the presser foot to the maximum height of the presser foot's working stroke. This poses a risk of interfering with the embroidery fabric during color changes and when the presser foot is not in use. Therefore, the presser foot can be raised to a height higher than the presser foot's working stroke, i.e., higher than the maximum height of the presser foot's working stroke. This can be defined as the first height, i.e., the non-working height.

[0059] like Figures 4 to 13 As shown, in order to raise the presser foot to a non-working height, an independent presser foot lifting mechanism 2 is also provided, which is used to raise the presser foot to a first height, which is higher than the highest point of the presser foot's working stroke. Here, "independent lifting" means that an independent presser foot lifting mechanism is set up completely independently, separate from the existing independent presser foot drive device in the prior art.

[0060] In this embodiment, the independent presser foot independent lifting mechanism 2 comprises a presser foot lifting motor 26 and a presser foot lifting component driven by the presser foot lifting motor 26, the presser foot lifting component is provided with a lifting part 211 supported below the presser foot driving block 53 during lifting, the lifting part 211 has a avoiding state away from below the presser foot driving block during presser foot working, at this time the independent presser foot independent lifting mechanism 2 does not work, the presser foot working is driven by the conjugate cam link mechanism 1. The lifting part 211 is not directly connected with the presser foot driving block, but is movably supported below the presser foot driving block, so that it directly acts with the presser foot driving block during lifting, and can be separated from the presser foot driving block and avoid below the presser foot driving block during non-lifting.

[0061] The lifting part 211 also acts with the bottom surface of the presser foot driving part 531, same as the third roller 161. It can be understood that, since the lifting part 211 and the third roller 161 are both below the presser foot driving block and both move up and down, in order to avoid mutual influence and realize the independent function of the independent presser foot independent lifting mechanism 2, the lifting part 211 and the third roller 161 are staggered in the transverse direction. The lifting part 211 can also be provided with a lifting roller, and here the lifting part is provided with a circular arc surface acting with the bottom surface of the presser foot driving part 531.

[0062] In some embodiments, the presser foot lifting component comprises a presser foot lifting link and a guide 23, the presser foot lifting link moves along the guide. Specifically, the presser foot lifting link comprises a first presser foot lifting link 21 and a second presser foot lifting link 22, the lifting part 211 is arranged at the first end of the first presser foot lifting link, the second end of the first presser foot lifting link 21 is hingedly connected with the first end of the second presser foot lifting link 22, the first presser foot lifting link 21 is provided with a guide part guided with the guide 23, and the presser foot lifting motor 26 drives the second presser foot lifting link 22 to rotate. Specifically, the guide 23 is provided with an upward and downward extending guide groove 231, and the guide part ascends and descends along the guide groove. Preferably, the guide part is provided with a guide roller 212, and the guide roller 212 is rollingly matched with the guide groove 231. In this way, when the second presser foot lifting link 22 rotates, the first presser foot lifting link 21 and the second presser foot lifting link 22 can also relatively rotate, and at the same time, the guide roller 212 is driven to ascend and descend in the guide groove 231.

[0063] Specifically, the second end of the first presser foot lifting link 21 is provided with a hinged groove 213, which is in a U-shaped structure, and a pin shaft is connected between the two side walls, and the first end of the second presser foot lifting link 22 is hinged in the hinged groove through the pin shaft. Wherein, the transverse projections of the lifting part 211, the guide part (guide roller 212) and the hinged groove 213 are respectively located at the three apexes of a triangle, and the lifting part and the guide part are correspondingly arranged on the transverse sides of the hinged groove. The lifting part extends obliquely upward below the presser foot driving block, and the guide part also extends obliquely upward, but the oblique extension direction is opposite to that of the lifting part, and an acute angle is formed between them, and at the same time, the guide part and the lifting part are also avoided in the front-rear direction, so that the guide roller 212 can ascend and descend along the guide groove. The lifting part and the guide part are correspondingly arranged on the transverse sides of the hinged groove, so as to avoid interference between them in the transverse space.

[0064] Specifically, the second presser foot lifting link 22 is provided with a link part 221, which is hinged with the first presser foot lifting link 21, and the second end of the second presser foot lifting link 22 is provided with a transmission sleeve 222, which is connected with the second end of the link part 221 in the axial direction, and the transmission sleeve 222 extends to one side of the second end of the link part 221, i.e. the side where the guide part is located, so as to leave space for the above-mentioned conjugate link assembly on the other side. The transmission sleeve 222 is rotationally supported on the rotating shaft 24, and a transmission assembly is arranged between the transmission sleeve 222 and the presser foot lifting motor 26, so that the presser foot lifting motor can drive the transmission sleeve to rotate through the transmission assembly, i.e. the rotation of the second presser foot lifting link can be realized. Wherein, the transmission assembly includes a rotating element, which drives the transmission sleeve to rotate. For example, the rotating element can be a gear, a sprocket, etc., and in this embodiment, a belt pulley is selected, which is connected with the presser foot lifting motor 26 through a synchronous belt, so that the presser foot lifting motor 26 can be arranged on the rear side of the machine head, without occupying the space of the machine head part.

[0065] In addition, a return torsional spring is arranged between the transmission sleeve 222 and the rotating shaft 24, which is used to realize the return of the second presser foot lifting link 22.

[0066] In this embodiment, a synchronous belt assembly is arranged between the presser foot lifting motor 26 and the presser foot lifting part. The synchronous belt assembly includes a driving belt pulley connected with the output shaft of the presser foot lifting motor 26, a driven belt pulley 25 connected with the rotating shaft 24, and a synchronous belt connecting the driving belt pulley and the driven belt pulley. It can be understood that the synchronous belt assembly can also be replaced by a gear transmission assembly or a chain transmission assembly, so that the above-mentioned rotating element can be a gear, a sprocket, etc.

[0067] As described below, because the driven pulley has a double effect, in addition to driving the second presser foot lifting link 22 described above, it is also necessary to drive the rotation shaft 24 to rotate to adjust the presser foot working stroke. Thus, the problem of sharing the driving components of the independent presser foot independent lifting mechanism and the independent presser foot working stroke adjustment structure is solved. However, when the rotation shaft 24 rotates to adjust the presser foot working stroke, the independent presser foot independent lifting mechanism should not work. Therefore, in order to avoid the transmission sleeve 222 rotating when the rotation shaft 24 is driven to rotate by the driven pulley 25. Therefore, a one-way transmission structure between the driven pulley 25 and the transmission sleeve 222 is specially designed. The driven pulley 25 has a first rotation angle and a second rotation angle. The driven pulley 25 drives the transmission sleeve 222 to rotate through the one-way transmission structure within the first rotation angle, and drives the presser foot lifting link to rotate by the transmission sleeve. The driven pulley 25 drives the rotation shaft 24 to rotate within the second rotation angle, and drives the second conjugate link pin to rotate by the rotation shaft to adjust the presser foot working stroke, and at this time the one-way transmission structure does not transmit.

[0068] The one-way transmission structure includes a transmission boss 223 arranged at the axial first end of the transmission sleeve and a transmission member arranged at the second end of the driven pulley. The transmission boss 223 protrudes from the partial circular arc position of the axial first end of the transmission sleeve to the axial first side. The transmission member can be a transmission pin 253. The transmission pin 253 and the transmission boss 223 correspond in the axial direction of the rotation shaft, so that the driven pulley drives the transmission sleeve to rotate within the first rotation angle through the cooperation of the transmission pin and the transmission boss. The first end of the driven pulley is closed by an end plate 251, and the second end is provided with a ring groove 252 around the rotation shaft. The transmission pin 253 is arranged in the ring groove 252. The end plate 251 is provided with a fixing hole at a position radially offset from the rotation shaft. The end of the transmission pin 253 can be fixed by interference fit with the fixing hole. In addition, the transmission boss 223 also extends into the ring groove 252.

[0069] Therefore, the driven pulley 25 drives the transmission sleeve 222 to rotate within the first rotation angle, and finally drives the lifting part 211 to lift. Within the second rotation angle, the transmission pin is located in the rotation angle avoiding the transmission boss, and the transmission pin and the transmission boss do not act. Therefore, when adjusting the presser foot working stroke, the independent presser foot independent lifting mechanism does not work, and the driven pulley 25 can be forward rotated or reversed. This angle is used to adjust the presser foot working stroke, which can increase or decrease the presser foot working stroke.

[0070] It can be understood that the "first rotation angle" and "second rotation angle" in the first rotation angle and the second rotation angle of the driven pulley 25 are only to distinguish the functions thereof. In addition, although the driven pulley also has the function of driving the rotation of the rotation shaft at its first rotation angle, at this time the conjugate cam link mechanism 1 does not work, so the influence on the conjugate cam link mechanism 1 can be ignored, as long as the presser foot working stroke is adjusted in place before the conjugate cam link mechanism 1 works again.

[0071] The reason why the conjugate link mechanism 1 is combined with the independent presser foot independent lifting mechanism 2 and the independent presser foot working stroke adjusting structure is mainly due to the limitation of the space inside the machine head. In the present embodiment, the independent presser foot independent lifting mechanism 2 and the independent presser foot working stroke adjusting structure share the driving source, i.e. the presser foot lifting motor 26 and the driven pulley 25; in addition, the conjugate link mechanism 1, the independent presser foot independent lifting mechanism 2 and the independent presser foot working stroke adjusting structure share the rotation shaft 24, and the segmented design of the corresponding functions can reduce the parts, save the space, and of course reduce the cost.

[0072] In the prior art, the independent presser foot driven by the main shaft cannot adjust the working stroke of the independent presser foot because the rotation angle of the main shaft is fixed, and the adaptability to embroidery products of different thicknesses is poor, which affects the quality of the embroidery products. Therefore, in some embodiments, an independent presser foot working stroke adjusting structure is further provided to adjust the working stroke of the presser foot. Specifically, the second conjugate link pin 243 described above is not independently provided, but is integrated with the rotation shaft 24, and is specifically provided at the eccentric position of the rotation shaft 24. The rotation shaft 24 drives the rotation of the second conjugate link pin 243, and the eccentric angle of the second conjugate link pin (the relative position of the eccentric part in the circumferential direction of the rotation shaft) is used to adjust the fulcrum position of the presser foot driving link 16, so as to adjust the working stroke of the presser foot. After the adjustment is completed, the presser foot lifting motor 26 stops working, and the second conjugate link pin 243 maintains the adjusted eccentric angle. During the rotation of the second conjugate link pin, the intermediate link 15 will also rotate to some position, but the entire conjugate cam link mechanism 1 does not work, and the conjugate link does not move.

[0073] The structure of the rotating shaft is specially designed to correspond to the function of the rotating shaft in the independent presser foot independent lifting mechanism 2 and the independent presser foot working stroke adjusting structure. The two ends of the rotating shaft 24 are respectively provided with a first shaft end 241 and a second shaft end 242. The first end of the driven pulley is provided with an end plate 251, the center of the end plate is provided with a insertion hole, the first shaft end 241 is inserted into the insertion hole, and the end plate 251 is connected with a fixing screw 254 for fixing the first shaft end, so as to lock and fix the driven pulley and the rotating shaft. The fixing screw 254 can be an internal hexagonal screw, or a handle can be provided to facilitate tightening. Alternatively, other fixing methods can also be used. In this way, the first shaft end and the driven pulley are fixed, and the driven pulley can drive the rotating shaft to rotate synchronously. The axial projections of the center points of the first shaft end 241 and the second shaft end 242 coincide, but the axial projection of the center point of the second conjugate connecting rod pin is offset from the axial projections of the center points of the first shaft end 241 and the second shaft end 242, i.e. eccentrically arranged. In addition, the second shaft end 242 is rotationally supported at a fulcrum point located on the machine head housing 4.

[0074] Further, the rotating shaft 24 is provided with a fulcrum section between the first shaft end 241 and the second conjugate connecting rod pin 243, and the diameter of the fulcrum section is greater than that of the first shaft end 241 and the second conjugate connecting rod pin 243. The transmission sleeve 222 is connected with the fulcrum section, and a bearing or a bushing can be arranged therebetween to realize smooth rotation, reduce noise and wear.

[0075] It can be understood that the independent presser foot will not be lifted simultaneously when the working stroke of the independent presser foot is adjusted. In addition, the transmission sleeve is provided with a circumferential limiting groove 224 along a part of the circumference, and a limiting pin 225 is connected at a corresponding axial position of the rotating shaft. The limiting pin 225 is limitedly matched with the circumferential limiting groove 224.

[0076] Preferably, a bearing or a bushing is arranged between the second conjugate connecting rod pin 243 and the pin hole of the presser foot driving connecting rod to realize smooth rotation, reduce noise and wear. Further, a lubricating groove can be arranged on the outer circular surface of the second conjugate connecting rod pin, and lubricating grease can be added.

[0077] The independent presser foot independent lifting mechanism 2 lifts the presser foot to a first height, wherein the presser foot lifting motor 26 serves as a driving source and also has other functions. Therefore, Figures 4 to 15 As shown, in some embodiments, in order to keep the presser foot at a non-working height, an independent presser foot clutch mechanism 3 is also provided. After the independent presser foot independent lifting mechanism 2 lifts the presser foot to a first height, the independent presser foot clutch mechanism 3 can lock the presser foot. In this way, the presser foot lifting motor can stop working, and can also have other functions, such as adjusting the working stroke of the presser foot.

[0078] The independent presser foot clutch mechanism 3 comprises a presser foot positioning block 532 connected with the presser foot and synchronized with the presser foot in lifting and a presser foot clutch plate 31 capable of relative movement with respect to the presser foot positioning block when driven, the presser foot clutch plate 31 having a first position corresponding to the working state of the presser foot and a second position corresponding to the non-working state of the presser foot, the presser foot clutch plate 31 having a locking portion 314, the locking portion 314 being locked with the presser foot positioning block 532 when the presser foot clutch plate 31 is in the second position and being unlocked with the presser foot positioning block 532 when the presser foot clutch plate 31 is in the first position. The presser foot positioning block 532 is fixedly connected with the presser foot driving block 53 or integrally arranged and protrudes forward so as to form cooperation with the locking portion 314.

[0079] Specifically, the presser foot clutch plate 31 is rotatably installed on the needle bar holder 5 through a clutch pin 32, and the presser foot clutch plate 31 is driven to rotate by a clutch driving component. The presser foot clutch plate 31 can rotate relative to the clutch pin 32 to realize locking and unlocking with the presser foot positioning block. The presser foot clutch plate has a first angle (i.e. the first position mentioned above) corresponding to the working state of the presser foot and a second angle (i.e. the second position mentioned above) corresponding to the height of the non-working state of the presser foot, and the locking portion 314 is unlocked with the presser foot positioning block 532 when the presser foot clutch plate is in the first angle.

[0080] The clutch driving component comprises a clutch spring (not shown in the figure), and the clutch spring makes the presser foot clutch plate have a tendency to rotate from the second angle to the first angle, i.e. the clutch spring will make the presser foot clutch plate rotate to the first angle and be unlocked with the presser foot positioning block if there is no other external force to block. Specifically, the clutch spring is a clutch torsion spring, which is installed on the clutch pin and connected with the presser foot clutch plate.

[0081] Further, the clutch driving component further comprises a needle bar lower stop point 55, and the presser foot clutch plate 31 has a rotation stopping portion 313, and the needle bar lower stop point 55 cooperates with the rotation stopping portion 313 to make the presser foot clutch plate be in the second angle. Specifically, the needle bar lower stop point 55 is provided with a jacking pin 551, the jacking pin 551 rises, cooperates with the rotation stopping portion 313, pushes the presser foot clutch plate 31 to rotate to the second angle, and finally makes the presser foot clutch plate 31 rotate to the second angle, so that the locking portion 314 is locked with the presser foot positioning block 532. That is, the locking portion is locked with the presser foot positioning block by means of the rising of the needle bar.

[0082] Specifically, the presser foot clutch plate 31 comprises a vertical segment 311 and a slant segment 312 extending from the top end of the vertical segment to one side thereof, and the slant segment is connected with the clutch pin 32. The bottom end of the slant segment extends to the other side of the vertical segment and forms a rotation-stopping portion 313. The lower part of one side of the vertical segment is provided with a side recess 315, and the locking portion 314 is arranged at the bottom side of the side recess. The above design of the presser foot clutch plate 31 is to minimize the space occupation in the transverse direction, because the distance between the adjacent two needle bars is small. For example, the design of the slant segment 312 forms the rotation-stopping portion 313, and at the same time, the top of the slant segment of one of the two adjacent presser foot clutch plates 31 extends above the bottom of the slant segment of the other presser foot clutch plate 31.

[0083] In this way, when the presser foot is not working, the top pin 551 pushes upward against the rotation-stopping portion 313, so that the presser foot clutch plate is kept in an approximately vertical state (second angle), and at the same time, the presser foot positioning block 532 is locked by the locking portion 314 and cannot be lowered. When the presser foot is working, the presser foot clutch plate 31 is deflected to a first angle under the action of the elastic force of the clutch spring, so that the locking portion 314 is disengaged from the presser foot positioning block 532, and the presser foot can work normally.

[0084] It can be understood that the connecting rod involved in the embodiment refers to a structure similar to a connecting rod, but the shape is not limited to a rod structure, and a bearing or a bushing can be arranged between the connecting rod and the connecting rod pin.

[0085] The above is only a specific embodiment of the utility model, but the protection scope of the utility model is not limited to this. Those skilled in the art should understand that the utility model includes but is not limited to the contents described in the above specific embodiment and the drawings. Any modification not deviating from the functional and structural principles of the utility model will be included in the scope of the claims.

Claims

1. Independent presser foot independent lifting and clutching structure, characterized in that, The independent presser foot independent lifting mechanism is used to lift the presser foot to a first height, which is higher than the highest point of the working stroke of the presser foot, and comprises a presser foot lifting motor and a presser foot lifting component driven by the presser foot lifting motor, the presser foot lifting component is provided with a lifting part which is supported below the presser foot driving block during lifting, and the lifting part has a clearance state away from below the presser foot driving block during the working process of the presser foot. The independent presser foot independent lifting mechanism is used to lift the presser foot to a first height, which is higher than the highest point of the working stroke of the presser foot, and comprises a presser foot lifting motor and a presser foot lifting component driven by the presser foot lifting motor, the presser foot lifting component is provided with a lifting part which is supported below the presser foot driving block during lifting, and the lifting part has a clearance state away from below the presser foot driving block during the working process of the presser foot.

2. The independent presser foot independent lifting and clutching structure according to claim 1, characterized by, The presser foot lifting component comprises a presser foot lifting connecting rod and a guide, and the presser foot lifting connecting rod moves along the guide.

3. The independent presser foot independent lifting and clutching structure according to claim 2, characterized by, The presser foot lifting connecting rod comprises a first presser foot lifting connecting rod and a second presser foot lifting connecting rod, the lifting part is arranged at the first end of the first presser foot lifting connecting rod, the second end of the first presser foot lifting connecting rod is hingedly connected to the first end of the second presser foot lifting connecting rod, and the first presser foot lifting connecting rod is provided with a guide part which is guided by the guide.

4. The independent presser foot independent lifting and clutching structure according to claim 3, characterized by, The guide part is provided with a guide groove extending upward and downward, and the guide part ascends and descends along the guide groove; and / or the guide part is provided with a guide roller.

5. The independent presser foot independent lifting and clutching structure according to claim 3, characterized by, The second end of the second presser foot lifting connecting rod is provided with a transmission sleeve, the transmission sleeve is rotatably supported on a rotating shaft, and a transmission structure is arranged between the transmission sleeve and the presser foot lifting motor.

6. The independent lifting and clutching structure of the vertical pressure foot according to claim 1, characterized in that, The presser foot clutching piece is rotatably installed through the clutching pin, the presser foot clutching piece has a first angle corresponding to the first position and a second angle corresponding to the second position, and the presser foot clutching piece is driven to rotate by a clutching driving component.

7. The independent lifting and clutching structure of the vertical pressure foot according to claim 6, characterized in that, The clutching driving component comprises a clutching spring, and the clutching spring causes the presser foot clutching piece to have a tendency to rotate from the second angle to the first angle.

8. The independent lifting and clutching structure of the vertical pressure foot according to claim 7, characterized in that, The clutching driving component comprises a needle bar lower stop point, the presser foot clutching piece has a rotation stopping part, and the needle bar lower stop point cooperates with the rotation stopping part to make the presser foot clutching piece be at the second angle.

9. The independent lifting and clutching structure of the vertical pressure foot according to claim 8, characterized in that, The presser foot clutching piece comprises a vertical section and an oblique section extending obliquely upward from the top end of the vertical section to one side of the vertical section, the oblique section is connected with the clutching pin, the bottom end of the oblique section extends to the other side of the vertical section and forms a rotation stopping part, the lower side of the vertical section is provided with a side recess, and the locking part is arranged at the bottom side of the side recess.

10. Embroidery machine comprising independent presser foot drive means, characterized in that, The independent presser foot driving device is provided with the independent presser foot independent lifting and clutching structure according to any one of claims 1 to 9.

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