Clutch device driven by rotating shuttle of sewing machine and sewing machine

Abstract

The utility model relates to a clutch device driven by a rotating shuttle of a sewing machine and the sewing machine, and the clutch device driven by the rotating shuttle of the sewing machine comprises a first shaft which is used for connecting a first rotating shuttle; the clutch disc is fixedly mounted on the first shaft; the second shaft is used for connecting a second rotating shuttle; the clutch claw is installed on the second shaft in a sliding mode, and the clutch claw and the second shaft are limited in the circumferential direction; the shifting fork acts on the clutch claw and drives the clutch claw and the clutch disc to be switched between a mutual meshing linkage state and a meshing releasing separation state, and an adaptive structure capable of switching a coupling state is arranged between the shifting fork and the clutch claw. And in the separation state, the circumferential positions of the clutch claw and the shifting fork are kept through the adaptive structure, and in the linkage state, the adaptive structure is decoupled. According to the technical scheme, rapid switching of the linkage relation among the multiple rotating shuttles can be achieved, and sewing requirements of different scenes are met.

Description

TECHNICAL FIELD

[0001] The present application relates to the sewing equipment technical field, especially relates to a sewing machine rotating shuttle drive clutch device and a sewing machine. BACKGROUND

[0002] The sewing machine is mainly used for combining several layers of sewing materials through sewing, and with the continuous evolution of technology, there are various types of sewing machines on the market. For example, a comprehensive feeding sewing machine for sewing automobile seats and high-end bags. In order to adapt to different use scenarios, the sewing machine has different settings of single and double needles and different types of multiple machine models. Enterprises often need to configure multiple devices to meet the changing production needs.

[0003] The skilled person in the art tries to improve production flexibility by adjusting the sewing equipment. For example, when processing single-thread sewing, the double-needle machine is disassembled with one needle and used as a single-needle machine to adapt to double-thread and single-thread sewing of the double-needle machine. However, the above setting also has new problems. For example, during the operation of the single-needle machine, one of the two shuttle tables of the double-needle machine has invalid rotation, the load of the main shaft motor cannot be reduced, the noise of the whole machine cannot be reduced, the whole set of parts of the shuttle table is unnecessarily worn, and there is room for improvement. Content of the utility model

[0004] The present application provides a sewing machine rotating shuttle drive clutch device, which can quickly switch the linkage relationship between multiple rotating shuttles and adapt to different sewing needs.

[0005] In an embodiment of the present application, a sewing machine rotating shuttle drive clutch device is disclosed, comprising:

[0006] A first shaft is used for connecting a first rotating shuttle.

[0007] A clutch disc is fixedly installed on the first shaft.

[0008] A second shaft is used for connecting a second rotating shuttle.

[0009] A clutch pawl is slidably installed on the second shaft and circumferentially limited between the second shaft.

[0010] A shift fork acts on the clutch pawl and drives the clutch pawl and the clutch disc to switch between the interlocking state of mutual engagement and the separation state of disengagement. The shift fork and the clutch pawl are provided with an adaptive structure capable of switching the coupling state. In the separation state, the adaptive structure maintains the circumferential position of the clutch pawl and the shift fork, and in the linkage state, the adaptive structure is decoupled.

[0011] The following also provides several optional modes, but not as an additional limitation of the above general scheme, just a further supplement or preferred, without technical or logical contradiction, each optional mode can be combined alone for the above general scheme, but also can be combined between multiple optional modes.

[0012] In one embodiment, the clutch device further comprises:

[0013] A driving mechanism is connected with the shift fork, and the driving mechanism uses a cylinder, a motor or an electromagnet as a power source.

[0014] In one embodiment, the driving mechanism comprises:

[0015] A support assembly, the shift fork is mounted on the support assembly around a swing axis;

[0016] A cylinder is mounted on the support assembly;

[0017] A connecting rod is hingedly connected at one end to a piston rod of the cylinder and at the other end to the shift fork.

[0018] In one embodiment, the shift fork has two fork arms arranged side by side, and the adaptation structure comprises:

[0019] An adaptation slot is provided in the clutch claw or the fork arm;

[0020] An adaptation part is provided by at least one of the fork arms or the clutch claw and is coupled with the adaptation slot.

[0021] In one embodiment, the clutch claw comprises:

[0022] A connecting sleeve is slidably sleeved on the second shaft, and a guide structure limiting the movement direction of each other is arranged between the inside of the connecting sleeve and the second shaft;

[0023] A first annular part is located on the outer periphery of the connecting sleeve, and a linkage tooth engaged with the clutch disc is arranged on one side of the first annular part in the axial direction;

[0024] A second annular part is located on the outer periphery of the connecting sleeve and is arranged in a spaced manner with the first annular part, and a containing area for the shift fork is arranged between the first annular part and the second annular part, and the adaptation slot is located on one side of the second annular part facing the containing area.

[0025] In one embodiment, the adaptation slot is arranged in two places in the circumferential direction of the connecting sleeve, each of the fork arms has the adaptation part, and each of the adaptation parts corresponds to the adaptation slot.

[0026] In one of the embodiments, the fork arm has a local outward protrusion on the side facing the second annular part to form the adapting part.

[0027] In one of the embodiments, the end of the fork arm is bent towards the second annular part and forms the adapting part.

[0028] In one of the embodiments, the clutch device further comprises:

[0029] The elastic member acts between the second shaft and the clutch claw to make the clutch claw tend to be in the engaged state, and in the disengaged state, the shift fork deforms the elastic member via the clutch claw to store energy.

[0030] In one of the embodiments, the elastic member is a coil spring sleeved on the second shaft, one end of the coil spring is fixed with the second shaft, and the other end abuts against the side of the second annular part facing away from the accommodating area.

[0031] In one of the embodiments of the application, a sewing machine is also disclosed, which comprises the clutch device for driving the shuttle of the sewing machine as described in the above technical solutions of the application.

[0032] The technical solutions disclosed in the application can conveniently realize the switching of the multiple shuttle engagement relationship through the optimized setting of the clutch device. For example, when it is required to change the double-thread sewing into single-thread sewing, one needle is removed to become a single needle, and the driving structures of the two shuttles are separated, only one shuttle participates in the sewing action, and the other remains stationary. Under the premise of ensuring the use effect, the load of the main shaft motor and the running noise of the whole machine are reduced, and unnecessary bobbin wear is avoided. The clutch device for driving the shuttle of the sewing machine in the application has a simple structure and compact layout, is good in adaptability, and can further provide a structural basis for the automatic control of the shuttle. BRIEF DESCRIPTION OF DRAWINGS

[0033] In order to more clearly illustrate the technical solutions in the embodiments of the application or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the application, and other drawings can be obtained by those skilled in the art without creative labor.

[0034] Figure 1 FIG. 1 is a schematic view of the clutch device for driving the shuttle of the sewing machine in one of the embodiments of the application;

[0035] Figure 2 FIG. 2 is a schematic view of the clutch device for driving the shuttle of the sewing machine in FIG. 1 from another angle; Figure 1 FIG. 3 is a schematic view of the clutch device for driving the shuttle of the sewing machine in FIG. 1 from the bottom angle (omitting the shuttle holder);

[0036] Figure 3A schematic view of a driving of a clutch pawl of a clutch device for driving a rotating shuttle of a sewing machine;

[0037] Figure 4 A schematic view of a cooperation of a clutch pawl and a clutch disc of a clutch device for driving a rotating shuttle of a sewing machine (omit the second shaft);

[0038] Figure 5 A schematic view of a part of a sewing machine in an embodiment of the present application.

[0039] The reference signs of the components are as follows:

[0040] 100, first shaft; 110, clutch disc; 111, linkage groove; 112, guide slope; 120, first shuttle holder;

[0041] 200, second shaft; 210, clutch pawl; 211, connecting sleeve; 2111, guide structure; 212, first annular part; 2121, linkage tooth; 213, second annular part; 2131, accommodating area; 214, elastic member; 220, second shuttle holder;

[0042] 300, shift fork; 301, fork arm; 310, driving mechanism; 311, support assembly; 312, air cylinder; 313, connecting rod;

[0043] 400, adapting structure; 410, adapting groove; 420, adapting part;

[0044] 500, thread trimming mechanism;

[0045] 900, machine frame. DETAILED DESCRIPTION

[0046] In order to make the above objectives, features and advantages of the present application more apparent, the specific embodiments of the present application will be described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. However, the present application can be practiced in a number of ways other than those specifically described herein, and the present application is not limited to the embodiments described herein as long as they do not depart from the scope of the present application.

[0047] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there can be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there can be an intervening element. The terms "vertical", "horizontal", "up", "down", "left", "right", and similar expressions used in the description of the specification are used for the purpose of illustration only and are not intended to be the only embodiment.

[0048] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0049] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature and the second feature are in indirect contact through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level (or in a usage state, or from a certain viewpoint in the drawing) than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level (or in a usage state, or from a certain viewpoint in the drawing) than the second feature.

[0050] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and / or" as used in this application includes any and all combinations of one or more of the associated listed items.

[0051] Reference Appendix Figure 1 and attached Figure 2 As shown, one embodiment of this application discloses a clutch device for a sewing machine shuttle drive, including a clutch pawl 210 and a clutch disc 110. The clutch pawl 210 and the clutch disc 110 can switch between a mutually engaged linkage state and a disengaged disengaged state (e.g., as shown in the attached diagram). Figure 2 As shown, the clutch disc 110 is fixedly installed on the first shaft 100, which is used to connect the first rotary shuttle, which is located in the first shuttle frame 120; the clutch pawl 210 is slidably installed on the second shaft 200 and is circumferentially limited between the clutch disc 210 and the second shaft 200, which is used to connect the second rotary shuttle, which is located in the second shuttle frame 220.

[0052] The clutch pawl 210 moves along the second shaft 200 via the shift fork 300 to switch its linkage state with the clutch disc 110. The shift fork 300 acts on the clutch pawl 210, enabling the switching of the states of the clutch disc 110 and the clutch pawl 210, as well as the rapid switching of the linkage relationship between the first shaft 100 and the second shaft 200, thereby changing the linkage relationship between different rotary hooks. In this embodiment, an adapter structure 400 with switchable coupling states is provided between the shift fork 300 and the clutch pawl 210. In the disengaged state, the adapter structure 400 maintains the circumferential position of the clutch pawl 210 and the shift fork 300, and in the linked state, the adapter structure 400 decouples. The adapter structure 400 can release the mutual movement stroke of the clutch pawl 210 and the shift fork 300 in the linked state while maintaining the relative position of the clutch pawl 210 and the shift fork 300 in the disengaged state so that the clutch pawl 210 and the clutch disc 110 can be stably engaged.

[0053] Appendix Figure 3 and attached Figure 4 The structure of the clutch pawl 210 is shown as an example, specifically including a connecting sleeve 211, a first annular portion 212, and a second annular portion 213.

[0054] The connecting sleeve 211 is slidably sleeved on the second shaft 200. The interior of the connecting sleeve 211 and the second shaft 200 are provided with a guide structure 2111 to restrict the direction of movement between them. The guide structure 2111 allows the connecting sleeve 211 to slide axially relative to the second shaft 200 and restricts the circumferential position of both. For example, the guide structure 2111 includes a sliding key disposed on the inner circumferential surface of the connecting sleeve and a keyway disposed on the second shaft 200 and cooperating with the sliding key, wherein the keyway extends axially on the second shaft 200.

[0055] The first annular portion 212 is located on the outer periphery of the connecting sleeve 211. One side of the first annular portion 212 is provided with a linkage tooth 2121 that meshes with the clutch disc 110. The clutch disc 110 is provided with a corresponding linkage groove 111. The two sides of the opening of the linkage groove 111 are provided with guide slopes 112 for guiding the linkage tooth 2121.

[0056] The second annular portion 213 is located on the outer periphery of the connecting sleeve 211 and is spaced apart from the first annular portion 212. The area between the first annular portion 212 and the second annular portion 213 is a receiving area 2131 for inserting the shift fork 300.

[0057] Reference Appendix Figure 2 In the illustrated embodiment, the clutch device further includes a drive mechanism 310, which is linked to the shift fork 300. The drive mechanism 310 can use a cylinder 312, a motor, or an electromagnet as a power source. Further, the drive mechanism 310 includes:

[0058] Support assembly 311, fork 300 is mounted on support assembly 311 around swing axis;

[0059] a cylinder 312 mounted on the support assembly 311;

[0060] a connecting rod 313, one end of which is hingedly connected to the piston rod of the cylinder 312, and the other end of which is hingedly connected to the shift fork 300.

[0061] The support assembly 311 is directly or indirectly connected to the frame 900 of the sewing machine to provide a motion reference. In the embodiment, the support assembly 311 includes a base plate connected to the frame 900 and an arm portion extending from the base plate, the middle portion of the shift fork 300 is hingedly connected to the arm portion of the support assembly 311, and the two ends of the shift fork 300 are respectively matched with the connecting rod 313 and the clutch claw 210. The connecting rod 313 can be one long strip, and in other embodiments, the connecting rod 313 can also be provided as a transmission mechanism matched by multiple components. Figure 2 In the embodiment shown, the piston rod of the cylinder 312 moves linearly and is arranged parallel to the axial direction of the first shaft 100 and the second shaft 200, and the cylinder 312 acts on the end portion of the shift fork 300 through the connecting rod 313, so as to realize the swing of the shift fork 300 relative to the support assembly 311, and then drive the movement of the clutch claw 210 relative to the clutch disc 110. In the embodiment, the driving mechanism 310 is located on the radial side of the first shaft 100 and the second shaft 200, and the spatial layout is more reasonable and compact.

[0062] The clutch claw 210 will produce bidirectional movement compared to the clutch disc 110, and the bidirectional movement process can be realized by the shift fork 300, for example, the shift fork 300 acts on the first annular portion 212 or the second annular portion 213 in the accommodation area 2131 to drive the clutch claw 210 to move in different directions; for another example, the shift fork 300 is hingedly connected to the clutch claw 210 to realize the movement control of the clutch claw 210. Or refer to the accompanying drawings Figure 3 As shown, the transmission between the shift fork 300 and the clutch claw 210 is unidirectional, and the shift fork 300 can only drive the disengagement of the clutch claw 210 and the clutch disc 110. In the accompanying drawings Figure 3 In the embodiment of unidirectional transmission, the clutch device further comprises: a resilient member 214, which acts between the second shaft 200 and the clutch claw 210, so that the clutch claw 210 tends to be in the linkage state, and in the separation state, the shift fork 300 deforms the resilient member 214 through the clutch claw 210 to store potential energy.

[0063] Further, the elastic member 214 is a coil spring sleeved on the second shaft 200, one end of the coil spring is fixed to the second shaft 200, and the other end is abutted against the side of the second annular portion 213 away from the accommodating area 2131. In the embodiment, the distance between the first annular portion 212 and the second annular portion 213 is greater than or equal to the movement stroke of the prong 301 of the shift fork 300. Further, the above-mentioned setting modes can also be implemented in combination, for example, when the distance between the first annular portion 212 and the second annular portion 213 is less than the movement stroke of the prong 301 of the shift fork 300 and the elastic member 214 is arranged, the clutch claw 210 enters the linkage state while being driven by the elastic member 214 and the shift fork 300, so as to ensure the reliability of the meshing action.

[0064] Reference is made to the accompanying drawings Figure 3 and the accompanying drawings Figure 4 In the embodiment shown in the drawings, the shift fork 300 has two prongs 301 arranged side by side, and the adapting structure 400 comprises:

[0065] The adapting slot 410 is arranged on the clutch claw 210.

[0066] The adapting portion 420 is provided by at least one prong 301 and is coupled with the adapting slot 410. Further, the adapting slot 410 is located on the side of the second annular portion 213 facing the accommodating area 2131. In order to improve stability, in the embodiment, the adapting slot 410 is arranged at two positions along the circumference of the connecting sleeve 211, each prong 301 is provided with the adapting portion 420, and each adapting portion 420 corresponds to the adapting slot 410.

[0067] In the implementation mode of the adapting portion 420, the prong 301 has a local outward protrusion on the side facing the second annular portion 213 to form the adapting portion 420. Further, the end of the prong 301 is bent towards the second annular portion 213 to form the adapting portion 420. In other embodiments, the adapting slot 410 and the adapting portion 420 can be interchanged, i.e. the adapting slot 410 is arranged on the shift fork 300, and the adapting portion 420 is arranged on the clutch claw 210.

[0068] Based on the above, the technical solutions in the present application can change the relative position of the clutch jaw 210 relative to the clutch disc 110 through the driving mechanism 310 to change the linkage relationship between multiple rotating shuttles, and even in the disengaged state, a specific positional relationship can be ensured to facilitate smooth engagement next time. For example, when it is necessary to change double-thread sewing to single-thread sewing, only one needle needs to be removed, becoming a single needle, and at the same time, the clutch jaw 210 and the clutch disc 110 are adjusted to the disengaged state, at this time, only a single rotating shuttle participates in the sewing action, and the other remains stationary, thereby reducing the load of the main shaft motor and the operating noise of the entire machine, and avoiding unnecessary shuttle wear; similarly, when it is necessary to change single-thread sewing to double-thread sewing, only the needle needs to be installed, and at the same time, the clutch jaw 210 and the clutch disc 110 are adjusted to the linkage state, at this time, multiple rotating shuttles participate in the sewing action synchronously, thereby ensuring the adaptability of the sewing equipment. In addition to the advantages of simple structure, compact layout, and good adaptability mentioned above, the sewing machine rotating shuttle driven clutch device in the present embodiment can further provide a structural basis for the automatic control of the rotating shuttle.

[0069] Based on the above, in combination with the accompanying Figure 5 In an embodiment of the present application, a sewing machine is also disclosed, which comprises the sewing machine rotating shuttle driven clutch device in the above embodiments. The specific arrangement of the sewing machine rotating shuttle driven clutch device is described above. The components of the clutch device are mounted on the frame 900, and the rotating shuttle and the needle cooperate with each other to realize the sewing process. The sewing machine further comprises a thread cutting mechanism 500 corresponding to each rotating shuttle, when the clutch disc 110 and the clutch jaw 210 are in the disengaged state, the corresponding thread cutting mechanism 500 of the powerless rotating shuttle also stops working, further reducing the load; when the clutch disc 110 and the clutch jaw 210 are in the linkage state, the thread cutting mechanism 500 remains working and achieves the effect of synchronous sewing of multiple rotating shuttles. The details of other parts of the sewing machine can be implemented in combination with the prior art, and will not be described here.

[0070] In summary, the sewing machine in the present application can be converted between single-needle and double-needle models at any time, has good adaptability; at the same time, the equipment load is adjustable, which can reduce the equipment use cost; and can effectively reduce the noise of the entire machine, reduce the wear of parts, reduce the equipment failure rate, and prolong the service life of the equipment.

[0071] The technical features of the above-described embodiments can be combined arbitrarily, and in order to make the description concise, not all possible combinations of the technical features in the above-described embodiments are described, however, as long as the combinations of the technical features do not exist contradictory, they should be considered as the scope disclosed in the present specification. When the technical features in different embodiments are embodied in the same drawing, it can be considered that the drawing also discloses the combination of each embodiment involved.

[0072] The above-described embodiments are merely illustrative of several embodiments of the present application, which are described in more detail and in a specific manner, but should not be construed as limiting the scope of the patent application. It should be noted that for those skilled in the art, several modifications and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the patent protection scope of the present application should be subject to the appended claims.

Claims

1. A clutching device for a sewing machine shuttle drive, characterized by, The clutch device comprises: a first shaft for connecting a first hook; a clutch disc fixedly mounted on the first shaft; a second shaft for connecting a second hook; a clutch pawl slidingly mounted on the second shaft and circumferentially limited with the second shaft; a shift fork acting on the clutch pawl to drive the clutch pawl and the clutch disc to switch between the engaged state and the disengaged state, wherein the shift fork and the clutch pawl are provided with an adaptive structure capable of switching the coupling state, and the adaptive structure keeps the circumferential position of the clutch pawl and the shift fork in the disengaged state and uncouples in the engaged state.

2. The sewing machine shuttle drive clutch apparatus according to claim 1, wherein, The clutch device further comprises: a driving mechanism coupled with the shift fork, wherein the driving mechanism uses a cylinder, a motor or an electromagnet as a power source.

3. The sewing machine shuttle drive clutch apparatus according to claim 2, wherein, The driving mechanism comprises: a support assembly, wherein the shift fork is mounted on the support assembly about a swing axis; a cylinder mounted on the support assembly; a connecting rod hingedly connected to a piston rod of the cylinder at one end and to the shift fork at the other end.

4. The sewing machine shuttle drive clutch apparatus according to claim 1, wherein, The shift fork has two fork arms arranged side by side, and the adaptive structure comprises: an adaptive groove provided in the clutch pawl or the fork arm; an adaptive part provided by at least one of the fork arm or the clutch pawl and coupled with the adaptive groove.

5. The sewing machine shuttle drive clutch apparatus according to claim 4, wherein, The clutch pawl comprises: a connecting sleeve slidingly sleeved on the second shaft, wherein the inside of the connecting sleeve and the second shaft are provided with a guide structure limiting the movement direction of each other; a first annular part located at the outer periphery of the connecting sleeve, wherein one side of the first annular part in the axial direction is provided with a linkage tooth engaged with the clutch disc; a second annular part located at the outer periphery of the connecting sleeve and spaced apart from the first annular part, wherein the first annular part and the second annular part form a containing area for the shift fork, and the adaptive groove is located on one side of the second annular part facing the containing area.

6. The sewing machine shuttle drive clutch apparatus according to claim 5, wherein, The adaptive groove is spaced apart at two positions along the circumference of the connecting sleeve, each of the fork arms is provided with the adaptive part, and each of the adaptive parts corresponds to the adaptive groove.

7. The sewing machine shuttle drive clutch apparatus according to claim 5, wherein, The fork arm has a local outward protrusion on the side facing the second annular part to form the adaptive part.

8. The sewing machine shuttle drive clutch apparatus according to claim 5, wherein, The end of the fork arm is bent towards the second annular part to form the adaptive part.

9. The sewing machine shuttle drive clutch apparatus according to claim 5, wherein, The clutch device further comprises: a resilient member acting between the second shaft and the clutch pawl to make the clutch pawl tend to the engaged state, wherein in the disengaged state, the shift fork deforms the resilient member to store energy via the clutch pawl; the resilient member is a spiral spring sleeved on the second shaft, one end of the spiral spring is fixed to the second shaft, and the other end abuts against one side of the second annular part away from the containing area.

10. A sewing machine characterized by comprising: The clutch device for driving the hook of a sewing machine comprises any one of claims 1 to 9.

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