A push rod structure of an upper thread clamping device and an upper thread clamping device of an embroidery machine

Abstract

The present invention discloses a push rod structure of a surface thread clamping device and a surface thread clamping device of an embroidery machine, belonging to the technical field of embroidery machines. The push rod structure comprises a motor, a push rod, a rotating shaft, a push plate and a baffle plate. The push rod can be moved forward and backward, the rotating shaft is arranged horizontally, the push plate and the baffle plate are arranged on the rotating shaft, the front end of the push rod contacts the push plate, the motor can drive the push rod to move forward, and when the push rod moves forward, the contact with the push plate drives the rotating shaft to rotate so that the baffle plate tilts forward. The motor of the push rod structure can be installed at the rear of the machine head, the rotating shaft can be rotatably arranged on the machine head, and the installation positions of various components of the push rod structure are reasonably set, which can effectively avoid the interference of the push rod structure with the surface thread clamping structure and the needle bar frame, and avoid the installation influence of the push rod structure on the surface thread clamping structure.

Description

Technical Field

[0001] The present invention relates to the technical field of embroidery machines, and in particular to a push rod structure of an upper thread clamping device. In addition, the present invention also relates to an upper thread clamping device adopting the push rod structure. Background Art

[0002] In the embroidery machine industry, with the improvement of product performance and fabric aesthetics, the requirements for product quality and efficiency have increased exponentially, and therefore it is necessary to ensure the stability of the embroidery machine's upper thread clamping. The upper thread clamping device is the main component of the embroidery machine. Its function is to cooperate with the embroidery machine to achieve the clamping or loosening of the upper thread, effectively solving the problem that the upper thread is easy to escape from the needle hole during thread cutting, color changing, and embroidery repair, and helping the embroidery machine to improve embroidery efficiency. The existing upper thread clamping device generally includes a clamping seat, a limiter and a push rod. The limiter is arranged on the clamping seat, and the push rod drives the limiter to move forward and backward relative to the clamping seat. When the push rod drives the limiter away from the clamping seat, the upper thread clamping device releases the upper thread. When the push rod drives the limiter close to the clamping seat, the upper thread clamping device clamps the upper thread.

[0003] In order to achieve the purpose of moving the push rod back and forth, the existing embroidery machine structure is generally achieved by setting two electromagnets located on the left and right sides of the machine head. The outer sleeve of the push rod is provided with a spring. When the electromagnet is powered off, the electromagnet pushes the push rod to move and compresses the spring. The push rod drives the limiter away from the clamping seat to achieve the purpose of loosening the upper thread. When the electromagnet is powered on, the thrust of the electromagnet on the push rod disappears, the spring drives the push rod to reset, and the push rod drives the limiter close to the clamping seat to reset, achieving the purpose of clamping the upper thread.

[0004] However, when the electromagnet is used to drive the ejector, the limited side space of the machine head will affect the normal installation of the upper thread clamping device. In addition, when the embroidery machine uses a separate head embroidery, the electromagnet cannot drive the ejector corresponding to the separate head embroidery needle bar, which cannot meet the working requirements of the embroidery machine. Summary of the invention

[0005] In order to solve the above-mentioned shortcomings and deficiencies in the prior art, the present invention provides a push rod structure of a needle thread clamping device, which better meets the requirements of clamping and loosening the needle thread.

[0006] In order to achieve the above-mentioned technical objectives, the present invention provides a push rod structure of a surface thread clamping device, including a motor, a push rod, a rotating shaft, a push plate and a baffle. The push rod can be moved forward and backward, the rotating shaft is arranged horizontally, the push plate and the baffle are arranged on the rotating shaft, the front end of the push rod is in contact with the push plate, and the motor can drive the push rod to move forward. When the push rod moves forward, the rotating shaft is driven to rotate through the contact with the push plate, causing the baffle to tilt forward.

[0007] Preferably, the push rod structure includes a torsion spring for driving the rotating shaft, the push piece and the baffle to reset. The torsion spring is sleeved on the rotating shaft, one end of the torsion spring is positioned and the other end contacts the rotating shaft. When the rotating shaft drives the baffle to rotate forward, the torsion spring is deformed by force.

[0008] Preferably, the push rod structure includes a fixed seat, the rotating shaft is mounted on the fixed seat, and one end of the torsion spring contacts the fixed seat to achieve positioning.

[0009] Preferably, the other end of the torsion spring abuts against the front side of the push plate or the blocking plate to contact the rotating shaft.

[0010] Preferably, a transmission wheel is sleeved on the motor shaft of the motor, the transmission wheel is provided with an eccentrically arranged convex shaft, and the rear end of the push rod contacts the circumferential outer wall of the convex shaft.

[0011] Preferably, a bearing is sleeved on the convex shaft, and the rear end of the push rod abuts against the circumferential outer wall of the bearing.

[0012] Preferably, at least two baffles are provided and are spaced apart along the axial direction of the rotating shaft.

[0013] Preferably, the push rod structure is provided with at least two sets in the transverse direction, the rotating shafts of two adjacent push rod structures are partially overlapped in the transverse direction, and the baffles of the two adjacent push rod structures are arranged in a staggered interval in the transverse direction.

[0014] Preferably, the push plate and the blocking plate are both sleeved on the rotating shaft, and the push rod structure also includes a positioning sleeve for axially positioning the push plate and the blocking plate, and the positioning sleeve is sleeved on the rotating shaft.

[0015] The present invention also provides an upper thread clamping device for an embroidery machine, comprising an upper thread clamping structure, the upper thread clamping structure comprising a clamping seat, a thread pressing piece, a push rod and a spring, the thread pressing piece is arranged on the clamping seat, the push rod is arranged along the front-back direction and the front end is connected to the thread pressing piece, and the spring is sleeved on the outside of the push rod. The upper thread clamping device also includes the push rod structure for the upper thread clamping device described above, and the rear end of the push rod contacts the baffle.

[0016] After adopting the above technical solution, the present invention has the following advantages:

[0017] 1. The push rod structure provided by the present invention, when the motor drives the push rod to move forward, the push rod drives the rotating shaft to rotate through the interference between the push plate and the push plate, and when the rotating shaft rotates, the baffle plate can be driven to tilt forward, and when the baffle plate is tilted forward, the corresponding push rod on the surface thread clamping structure can be driven to move forward to overcome the action of the spring, so that the corresponding wire pressing piece can move forward relative to the clamping seat to release the surface thread. When resetting, the thrust of the motor on the push rod is eliminated, and the thrust of the baffle plate on the push rod is also eliminated. The spring under force compression can drive the push rod to move backward and reset. When the push rod is reset, the wire pressing piece is driven to move backward and reset synchronously so that the wire pressing piece can cooperate with the clamping seat to reset and clamp the surface thread. The specific structure of the push rod structure is reasonably set to better meet the purpose of clamping or loosening the surface thread in cooperation with the surface thread clamping structure. The motor of the push rod structure can be installed at the rear of the machine head, and the rotating shaft can be rotatably arranged on the machine head. The installation positions of the various components of the push rod structure are reasonably set, which can effectively avoid the interference of the push rod structure with the surface thread clamping structure and the needle bar frame, and avoid the installation influence of the push rod structure on the surface thread clamping structure.

[0018] 2. When the push rod drives the baffle to tilt forward through the push plate and the shaft, the torsion spring is deformed by force. When the push rod's thrust on the push plate is eliminated, the torsion spring can drive the push plate, the shaft and the baffle to automatically rotate and reset. When the push plate is reset, it can drive the push rod to move backward and reset, so that the push rod structure can achieve the purpose of automatic reset as a whole.

[0019] 3. The torsion spring is sleeved on the rotating shaft, one end of the torsion spring contacts the fixed seat to realize the positioning setting, and the other end is against the front side of the push plate or the baffle to realize the contact with the rotating shaft. The installation method of the torsion spring is reasonably set so that the torsion spring can meet the working requirements of driving the relevant components of the push rod structure to automatically reset.

[0020] 4. A transmission wheel is sleeved on the motor shaft of the motor, a bearing is sleeved on the convex shaft of the transmission wheel, and the rear end of the push rod is in abutment with the circumferential outer wall of the bearing. When the motor is working, the motor shaft drives the bearing to rotate eccentrically through the transmission wheel. When the bearing rotates eccentrically, it can drive the push rod forward through abutment. When the thrust of the bearing on the push rod is eliminated, the torsion spring can drive the push rod to move backward for reset. The driving matching structure between the motor and the push rod is reasonably set to meet the driving requirements of the push rod moving forward and backward.

[0021] 5. At least two baffles are provided. When the head of the embroidery machine is performing inter-head embroidery, the baffles on the same rotating shaft can act on the top rod connected to the thread pressing piece corresponding to the needle bar participating in the inter-head embroidery, so that the upper thread clamping structure meets the upper thread clamping requirements when the embroidery machine is performing inter-head embroidery.

[0022] 6. At least two sets of push rod structures are arranged in the transverse direction, and the rotating shafts of the two adjacent push rod structures are partially overlapped in the transverse direction. The baffles of the two adjacent push rod structures are arranged in a staggered interval in the transverse direction, so that the baffles of different push rod structures can cooperate with the top rods connected to the thread pressing pieces corresponding to different needle bars for interleaved embroidery, so as to better meet the surface thread clamping requirements of the embroidery machine when performing interleaved embroidery.

[0023] 7. The push piece and the baffle piece are sleeved on the rotating shaft, and the matching structure between the push piece and the rotating shaft, and between the baffle piece and the rotating shaft is simple, which is convenient for assembly. The push piece and the baffle piece are axially positioned by the positioning sleeve sleeved on the rotating shaft, ensuring that the push piece and the push rod can maintain a stable match, and also ensuring that the baffle piece and the top rod of the surface thread clamping structure can maintain a stable match.

[0024] 8. The upper thread clamping device provided by the present invention adopts the push rod structure described above. When the push rod structure drives the push rod to overcome the force of the spring and move forward, the thread pressing piece moves away from the clamping seat, and the upper thread clamping structure releases the upper thread. When the push force of the push rod structure on the push rod is eliminated, the spring drives the push rod to move backward and reset, and the push rod drives the thread pressing piece to approach the clamping seat, and the upper thread clamping structure clamps the upper thread. The push rod structure is reasonably set to meet the working requirements of the upper thread clamping structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is a schematic diagram of a push rod structure in Example 1;

[0026] Figure 2 Schematic diagram of some components of the push rod structure in Example 1;

[0027] Figure 3 It is a schematic diagram of the cooperation between the motor and the push rod in the push rod structure of Example 1;

[0028] Figure 4 An exploded view of some components of the push rod structure in Example 1;

[0029] Figure 5 This is a schematic diagram of a wire clamping device according to an embodiment;

[0030] Figure 6 It is an exploded view of some components of the upper thread clamping structure in the upper thread clamping device of the embodiment;

[0031] Figure 7 Schematic diagram of the embroidery machine head of Example 1.

[0032] In the figure, 100-push rod structure, 110-motor, 120-push rod, 130-rotating shaft, 140-push plate, 150-blocking plate, 160-fixed seat, 161-jack, 170-positioning sleeve, 180-torsion spring, 190-transmission wheel, 191-cam shaft, 192-bearing, 1100-guide sleeve, 200-surface line clamping structure, 210-clamping seat, 220-pressing plate, 230-pushing rod, 240-spring, 300-casing, 400-bracket, 500-knife rod. DETAILED DESCRIPTION

[0033] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the following words indicating orientation or positional relationship such as "upper", "lower", "left", "right", "longitudinal", "lateral", "inner", "outer", "vertical", "horizontal", "top", "bottom", etc. are only based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device / element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention.

[0034] Embodiment 1

[0035] like Figures 1 to 4 As shown, the first embodiment of the present invention provides a push rod structure of a surface thread clamping device. The push rod structure 100 includes a motor 110, a push rod 120, a rotating shaft 130, a push piece 140 and a baffle 150. The push rod 120 can be moved forward and backward, the rotating shaft 130 is arranged horizontally, the push piece 140 and the baffle 150 are arranged on the rotating shaft 130, the front end of the push rod 120 contacts the push piece 140, the motor 110 can drive the push rod 120 to move forward, and when the push rod 120 moves forward, the contact with the push piece 140 drives the rotating shaft 130 to rotate so that the baffle 150 tilts forward.

[0036] The left and right directions shown in the figure are lateral directions, and the front and rear directions are arranged perpendicularly to the left and right directions on a horizontal plane. The axial direction of the rotating shaft 130 is arranged along the left and right directions, and the axial direction of the push rod 120 is arranged along the front and rear directions, that is, the push rod 120 is arranged perpendicularly to the rotating shaft 130.

[0037] In order to install the rotating shaft 130, the push rod structure further includes a fixing seat 160, on which a through hole matching the rotating shaft 130 is provided, the fixing seat 160 is fixedly arranged, and the rotating shaft 130 is rotatably mounted on the fixing seat 160 through the through hole. In this embodiment, two or three fixing seats 160 of the same push rod structure 100 are arranged at intervals along the left and right directions, and each fixing seat 160 is fixed to the head of the embroidery machine by a fastener, and the rotating shaft 130 is mounted on the front side of the head through the fixing seat 160.

[0038] The push piece 140 and the baffle 150 are both sleeved on the rotating shaft 130 and fixed by screws. In order to keep the push piece 140 and the baffle 150 axially stable on the rotating shaft 130, the push rod structure 100 further includes a positioning sleeve 170. The positioning sleeve 170 is sleeved on the rotating shaft 130. The end of the positioning sleeve 170 is in conflict with any two of the fixing seat 160, the push piece 140, and the baffle 150, so that the push piece 140 and the baffle 150 are axially positioned. In this embodiment, the push piece 140, the baffle 150 and the fixing seat 160 in the same push rod structure are arranged at intervals in the left-right direction. Accordingly, a plurality of positioning sleeves 170 are provided, and the lengths of the positioning sleeves 170 are different. The length of the positioning sleeve is determined according to the specific distance between two adjacent components.

[0039] In order to drive the baffle 150, the rotating shaft 130, the push piece 140 and the push rod 120 to reset, the push rod structure 100 further includes a torsion spring 180, one end of which is positioned and the other end is in contact with the rotating shaft 130. Specifically, the torsion spring 180 is sleeved on the outside of one of the positioning sleeves 170, one end of which is in contact with the fixing seat 160 to achieve positioning, and the other end is against the front side of the push piece 140 or the baffle 150 to achieve contact with the rotating shaft 130. In this embodiment, the fixing seat 160 is provided with a socket 161 for inserting the legs of the torsion spring 180, one of the legs of the torsion spring 180 is inserted into the socket 161 to achieve positioning, and the other leg of the torsion spring 180 is against the front side of the push piece 140 to achieve contact with the rotating shaft 130. When the push rod 120 drives the baffle 150 to tilt forward through the push piece 140 and the rotating shaft 130, the torsion spring 180 is deformed by force. When the push rod 120 eliminates the thrust of the push piece 140, the torsion spring 180 can drive the push piece 140, the rotating shaft 130 and the blocking piece 150 to automatically rotate and reset. When resetting, the push piece 140 can drive the push rod 230 to move backward and reset, so that the push rod structure 100 can be automatically reset as a whole.

[0040] In order to achieve the purpose of driving the push rod 120 to move forward by the motor 110, a transmission wheel 190 is sleeved on the motor shaft of the motor 110, and the transmission wheel 190 is provided with an eccentrically arranged convex shaft 191, and the rear end of the push rod 120 contacts the circumferential outer wall of the convex shaft 191. In this embodiment, the motor 110 is arranged at the rear side of the machine head, the motor shaft of the motor 110 is arranged in the left and right direction, and the convex shaft 191 is sleeved with a bearing 192, and the rear end of the push rod 120 abuts against the circumferential outer wall of the bearing 192 to contact the circumferential outer wall of the convex shaft 191. When the motor 110 is working, the motor shaft drives the bearing 192 to rotate eccentrically through the transmission wheel 190, and the distance between the center point of the bearing 192 and the rear end of the push rod 120 changes. When the motor 110 is working, the motor shaft drives the bearing 192 to rotate eccentrically through the transmission wheel 190. When the bearing 192 rotates eccentrically, it can drive the push rod 120 to move forward through the interference fit. When the thrust effect of the bearing 192 on the push rod 120 is eliminated, the torsion spring 180 can drive the push rod 120 to move backward for reset.

[0041] In order to improve the stability of the push rod 120 when it moves forward and backward, the push rod structure 100 also includes a guide sleeve 1100. The axial direction of the guide sleeve 1100 is arranged along the front-to-back direction. The push rod 120 can be moved forward and backward and is inserted into the guide sleeve 1100. The guide sleeve 1100 is fixed on the head of the embroidery machine through the shaft hole.

[0042] In order to meet the requirements of surface thread clamping when the embroidery machine performs interlocking embroidery, two baffles 150 are preferably provided in the same push rod structure 100. The two baffles 150 are spaced apart and sleeved on the rotating shaft 130 along the left and right directions. The two baffles 150 of the same push rod structure correspond to the needle bars for interlocking embroidery.

[0043] In this embodiment, the push rod structure 100 is preferably provided with two sets in the horizontal direction, the rotating shafts 130 of the two push rod structures are partially overlapped in the horizontal direction, and the baffles 150 in the two push rod structures are staggered and spaced in the horizontal direction. Specifically, the motors 110 and the push rods 120 of the two push rod structures 100 are spaced in the left-right direction, the rotating shafts 130 of the two push rod structures are distributed up and down, the left end of the right rotating shaft is located below the right end of the left rotating shaft so that the rotating shafts of the two push rod structures are partially overlapped in the horizontal direction, and the four baffles 150 of the two push rod structures are staggered and spaced in the left-right direction, that is, one of the baffles of the right push rod structure is located between the two baffles of the left push rod structure in the horizontal direction.

[0044] like Figure 5 , Figure 6As shown, this embodiment also provides an upper thread clamping device for an embroidery machine, including an upper thread clamping structure 200 and the above-mentioned push rod structure 100. The upper thread clamping structure 200 includes a clamping seat 210, a thread pressing piece 220, a push rod 230 and a spring 240. The thread pressing piece 220 is arranged on the clamping seat 210, the push rod 230 is arranged along the front-to-back direction and the front end is connected to the thread pressing piece 220, the spring 240 is sleeved on the outside of the push rod 230, and the rear end of the push rod 230 contacts the blocking piece 150.

[0045] In the present embodiment, the line pressing piece 220 is arranged at the front side of the clamping seat 210, and the front end of the push rod 230 passes through the clamping seat 210 and is fixedly connected with the corresponding line pressing piece 220, and the surface line is located between the line pressing piece 220 and the clamping seat 210. Under normal conditions, the line pressing piece 220 presses the surface line on the clamping seat 210 to achieve clamping the surface line. When the baffle 150 of the push rod structure 100 tilts forward, the push rod 230 matched with the baffle drives the line pressing piece 220 to move forward and compresses the spring 240, and the line pressing piece 220 releases the corresponding surface line. When the torsion spring 180 drives the baffle 150, the rotating shaft 130, the push piece 140 and the push rod 120 to reset, the spring 240 drives the push rod 230 and the line pressing piece 220 to move backward to reset, and the line pressing piece 220 presses the corresponding surface line on the clamping seat 210, and returns to the state of clamping the surface line.

[0046] like Figure 7 As shown, this embodiment also provides an embroidery machine head, including a housing 300, a needle bar frame (not shown) arranged at the front side of the housing 300, and the upper thread clamping device described above. The needle bar frame is arranged at the front side of the housing 300 through a slide rail structure, and the needle bar frame can move back and forth in the left and right direction relative to the housing 300. The rotating shaft 130 of the push rod structure 100 is arranged at the front side of the housing 300 through a fixed seat 160, the motor 110 is arranged at the rear side of the housing 300 through a bracket 400, and the guide sleeve 1100 is fixed to the housing 300 in the front and rear direction. The clamping seat 210 of the upper thread clamping structure 200 is fixed to the front side of the needle bar frame through a fastener, and the upper thread clamping structure 200 can move left and right synchronously with the needle bar frame.

[0047] The needle bar frame is provided with a plurality of needle bars (not shown in the figure) arranged at intervals in the left-right direction, and the housing 300 is provided with a driver (not shown in the figure) for driving the needle bars to move up and down, and the thread pressing piece 220, the push rod 230 and the spring 240 are all arranged one by one corresponding to the needle bars. When the driver drives the corresponding needle bar to move up and down, the thread pressing piece 220 corresponding to the needle bar moves forward relative to the clamping seat 210 to release the upper thread, so that the upper thread can be normally supplied when the needle bar is embroidering.

[0048] In order to explain the working condition of the push rod structure 100 during the interlaced embroidery, this embodiment is described by taking 12 needle bars arranged from left to right on the needle bar frame as an example. At this time, the housing 300 is provided with four guide bars 500 arranged from left to right, and each guide bar 500 is sleeved with a driver. The needle bars at positions 1 to 3 arranged in sequence from left to right are driven by driver No. 1, the needle bars at positions 4 to 6 are driven by driver No. 2, the needle bars at positions 7 to 9 are driven by driver No. 3, and the needle bars at positions 10 to 12 are driven by driver No. 4.

[0049] When the machine head performs flat embroidery, assuming that the four drivers drive the needle bars at positions 1, 4, 7, and 10 respectively, the top rod 230 connected to the thread pressing pieces 220 corresponding to the needle bars at positions 1, 4, 7, and 10 respectively abut against the four baffles 150 of the two sets of push rod structures 100, and when the four baffles 150 tilt forward, the top rod 230 corresponding to the needle bars at positions 1, 4, 7, and 10 is driven to move forward, thereby driving the thread pressing pieces 220 corresponding to the needle bars at positions 1, 4, 7, and 10 to move forward to loosen the corresponding surface threads, so that the surface threads can be supplied normally when the needle bars are performing embroidery.

[0050] If the needle bar frame moves to the left so that the four drivers drive the needle bars at positions 2, 5, 8, and 11 respectively, the four push rods corresponding to the needle bars at positions 1, 4, 7, and 10 are separated from the four baffles 150, and the spring 240 drives the corresponding push rods and thread pressing pieces to move backward and reset, so that the thread pressing pieces corresponding to the needle bars at positions 1, 4, 7, and 10 press the upper thread against the clamping seat 210 again. The four push rods corresponding to the needle bars at positions 2, 5, 8, and 11 are respectively against the four baffles, and when the four baffles are tilted forward, they can drive the thread pressing pieces corresponding to the needle bars at positions 2, 5, 8, and 11 to move forward and release the corresponding upper thread.

[0051] When the machine head performs interlaced embroidery, the No. 1 driver and the No. 3 driver participate in the driving at the same time, or the No. 2 driver and the No. 4 driver participate in the driving at the same time. When the No. 1 driver and the No. 3 driver participate in the driving at the same time, the push rod structure 100 on the left side operates, and the two baffles of the push rod structure on the left side tilt forward to make the thread pressing piece 220 corresponding to the needle bar driven by the No. 1 and No. 3 drivers move forward to release the corresponding upper thread. When the No. 2 driver and the No. 4 driver participate in the driving at the same time, the push rod structure 100 on the right side operates, and the two baffles of the push rod structure on the right side can tilt forward to make the thread pressing piece corresponding to the needle bar driven by the No. 2 and No. 4 drivers move forward to release the corresponding upper thread.

[0052] It is understandable that the specific structure of the fixing seat 160 in the same push rod structure 100 may vary due to different installation positions, and it only needs to meet the installation requirements of the rotating shaft 130.

[0053] It is understandable that the specific number and specific installation positions of the fixing seats 160 in the same push rod structure 100 can be reasonably determined according to the installation requirements of the rotating shaft and the installation space on the housing.

[0054] It is understandable that the positioning setting method of one end of the torsion spring 180 is not limited to the above description and drawings, and the support leg of the torsion spring 180 can also be against the rear side of the fixing seat 180 to achieve positioning setting. Of course, other reasonable methods can also be used to achieve positioning setting.

[0055] It is understandable that the way the other end of the torsion spring 180 contacts the rotating shaft is not limited to the above description and drawings. The support leg of the torsion spring can also be against the front side of the baffle 150 to achieve contact with the rotating shaft. Of course, other reasonable ways can also be used to achieve the setting of contact with the rotating shaft.

[0056] It is understandable that the specific structure of the motor 110 driving the push rod 120 to move forward and backward is not limited to the above description and drawings, and other reasonable structures may also be adopted, such as directly setting a cam on the motor shaft of the motor 110, the center line of the cam deviates from the center line of the motor shaft, and the rear end of the push rod 120 directly contacts and cooperates with the circumferential outer wall of the cam.

[0057] It is understandable that the specific number of the thread pressing piece 220, the push rod 230 and the spring 240 in the surface thread clamping structure 200 is not limited to the above description and the drawings, and can be reasonably determined according to the specific structure of the needle bar frame.

[0058] It is understandable that the specific number of push rod structures on the same machine head is not limited to the two sets described above and shown in the drawings. The specific number of push rod structures is reasonably determined based on the number of driver pairs on the machine head for inter-head embroidery driving.

[0059] It is understandable that other structures of the embroidery machine head can refer to the prior art.

[0060] In addition to the above preferred embodiments, the present invention has other implementation modes. Those skilled in the art may make various changes and modifications based on the present invention. As long as they do not depart from the spirit of the present invention, they should all fall within the scope defined in the claims of the present invention.

Claims

1. A push rod structure of a surface thread clamping device, characterized in that: It includes a motor, a push rod, a rotating shaft, a push sheet and a baffle. The push rod can be moved forward and backward, the rotating shaft is arranged horizontally, the push sheet and the baffle are arranged on the rotating shaft, the front end of the push rod contacts the push sheet, the motor can drive the push rod to move forward, and when the push rod moves forward, the contact with the push sheet drives the rotating shaft to rotate so that the baffle tilts forward. The push rod is arranged perpendicularly to the rotating shaft; The push rod structure includes a torsion spring for driving the rotating shaft, the push plate and the baffle to reset. The torsion spring is sleeved on the rotating shaft. One end of the torsion spring is positioned and the other end is in contact with the rotating shaft. When the rotating shaft drives the baffle to tilt forward, the torsion spring is deformed by force. There are at least two baffles, and the baffles are spaced apart along the axial direction of the rotating shaft; The push rod structure is provided with at least two sets in the transverse direction, the rotating shafts of two adjacent push rod structures are partially overlapped in the transverse direction, and the blocking plates of the two adjacent push rod structures are arranged in a staggered interval in the transverse direction.

2. The push rod structure according to claim 1, characterized in that: The push rod structure comprises a fixing seat, a rotating shaft is mounted on the fixing seat, and one end of the torsion spring contacts the fixing seat to realize positioning.

3. The push rod structure according to claim 1, characterized in that: The other end of the torsion spring abuts against the front side of the push plate or the blocking plate to contact the rotating shaft.

4. The push rod structure according to claim 1, characterized in that: A transmission wheel is sleeved on the motor shaft of the motor, and the transmission wheel is provided with an eccentrically arranged convex shaft, and the rear end of the push rod contacts the circumferential outer wall of the convex shaft.

5. The push rod structure according to claim 4, characterized in that: A bearing is sleeved on the convex shaft, and the rear end of the push rod abuts against the circumferential outer wall of the bearing.

6. The push rod structure according to claim 1, characterized in that: The push piece and the blocking piece are both sleeved on the rotating shaft. The push rod structure also includes a positioning sleeve for axially positioning the push piece and the blocking piece. The positioning sleeve is sleeved on the rotating shaft.

7. An upper thread clamping device for an embroidery machine, comprising an upper thread clamping structure, the upper thread clamping structure comprising a clamping seat, a thread pressing piece, a push rod and a spring, the thread pressing piece is arranged on the clamping seat, the push rod is arranged along the front-back direction and the front end is connected to the thread pressing piece, the spring is sleeved on the outside of the push rod, and the characteristics are as follows: The upper thread clamping device further comprises a push rod structure for the upper thread clamping device as described in any one of claims 1 to 6, and the rear end of the push rod abuts against the blocking piece.

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