Switchable double-take-up driving mechanism

Abstract

The utility model provides a switchable double-take-up driving device which comprises a machine shell, a main shaft arranged on the machine shell and a driving shaft for driving a take-up mechanism to take up threads, and further comprises a first take-up driving mechanism and a second take-up driving mechanism which are suitable for different upper threads. The first take-up driving mechanism comprises a first eccentric cam or a cam groove arranged on the main shaft, and a first driving arm driven by the first eccentric cam or the cam groove; the second take-up driving mechanism comprises a second eccentric cam or a cam groove arranged on the main shaft and a second driving arm driven by the second eccentric cam or the cam groove, the first driving arm and the second driving arm are provided with corresponding rotating fulcrums, and the driving shaft is provided with a switching piece capable of switching driving of different driving arms in a sliding mode when the first driving arm and the second driving arm are located at the parking position. A first sliding structure is arranged between the first driving arm and the switching piece and between the second driving arm and the switching piece. And a second sliding structure and a driver for driving the switching piece to slide are arranged between the driving shaft and the switching piece. The upper thread cutting device can be suitable for two kinds of upper threads and is higher in efficiency.

Description

Technical Field

[0001] The utility model relates to the technical field of embroidery machines, in particular to a switchable double thread take-up driving mechanism. Background Art

[0002] An embroidery machine usually has a thread take-up mechanism. The thread take-up mechanism has two functions. One is to control the thread take-up lever to supply an appropriate amount of top thread for sewing; the other is to control the thread take-up lever to retract an appropriate amount of top thread, so that the interweaving of the top and bottom threads is in the middle of the sewing material and tightened, and then draw the top thread required for the next sewing line from the thread bobbin. Due to the differences in its thread winding and unwinding and thread quality, different thread take-up cams are required. However, due to the limited space of the machine head, there is only one thread take-up cam on the machine heads on the current market, which cannot achieve dual-purpose or multi-purpose functions of one machine, resulting in lower efficiency. Summary of the Invention

[0003] In order to solve the problems of the above-mentioned prior art, the utility model provides a switchable double thread take-up driving mechanism, which is provided with two switchable thread take-up driving mechanisms. Different thread take-up driving mechanisms can be switched through a switching member to drive different threads, with a large application range and high efficiency.

[0004] The adopted technical solution is as follows:

[0005] A switchable double thread take-up driving device includes a machine shell, a main shaft arranged on the machine shell, and a driving shaft for driving the thread take-up mechanism to take up the thread. It also includes a first thread take-up driving mechanism and a second thread take-up driving mechanism suitable for different top threads. The first thread take-up driving mechanism includes a first eccentric cam or cam groove arranged on the main shaft and a first driving arm driven by the first eccentric cam or cam groove; the second thread take-up driving mechanism includes a second eccentric cam or cam groove arranged on the main shaft and a second driving arm driven by the second eccentric cam or cam groove. Corresponding rotation fulcrums are arranged on the first and second driving arms. A switching member is arranged on the driving shaft, which can slide and switch different driving arms when the first and second driving arms are in the parking position. A first sliding structure is arranged between the first and second driving arms and the switching member; a second sliding structure and a driver for driving the switching member to slide are arranged between the driving shaft and the switching member.

[0006] Further, the first sliding structure includes a first sliding convex block and a first sliding groove, and the second sliding structure includes a second sliding convex block and a second sliding groove.

[0007] Further, the first sliding convex block is arranged on the switching member, and the first sliding groove is arranged at one end of the first and second driving arms that cooperate with the switching member.

[0008] Further, the second sliding convex block is arranged on the switching member, and the second sliding groove is arranged on the driving shaft.

[0009] Further, the thread take-up mechanism includes a thread take-up lever and a driving lever provided on a driving shaft for driving the thread take-up lever to take up the thread.

[0010] Further, a driving structure is provided between the thread take-up lever and the driving lever.

[0011] Further, a double driving cam is provided on the main shaft. The first eccentric cam or cam groove is provided on one side of the double driving cam; the second eccentric cam or cam groove is provided on the other side of the double driving cam.

[0012] Further, rollers cooperating with corresponding sliding grooves are provided on the first sliding convex block and / or the second sliding convex block.

[0013] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0014] The present utility model provides a switchable double thread take-up driving device, which includes a first thread take-up driving mechanism and a second thread take-up driving mechanism adapted to different top threads. Different cams or cam grooves are provided on the first and second thread take-up driving mechanisms to drive corresponding driving arms, so that the movement trajectories of the driving arms are different to adapt to different top threads. The thread take-up mechanism is provided on a driving shaft, and a slidable switching member is provided on the driving shaft. The switching member can be driven to slide by an external or directly provided corresponding driver and cooperate with different thread take-up driving mechanisms, so that the corresponding thread take-up driving mechanism drives the switching member to rotate. The switching member is slidably connected to the driving shaft. After the switching member rotates, it drives the driving shaft to rotate, thereby driving the thread take-up mechanism to take up the thread. The structure of the present utility model is simple, and it is provided with a double thread take-up driving mechanism. Different thread take-up driving mechanisms can be switched according to needs to be applicable to different top threads. Two thread take-up driving mechanisms are provided on one machine head at the same time, with higher efficiency, wider application range, simple structure and space saving. Description of the Drawings

[0015] Figure 1 It is a schematic diagram of the overall structure of the present utility model;

[0016] Figure 2 It is a schematic diagram of one side of the present utility model;

[0017] Figure 3 It is a schematic diagram of another side of the present utility model;

[0018] Figure 4 It is a three-dimensional view of the present utility model;

[0019] Among them, the machine shell 1, the main shaft 2, the thread take-up mechanism 3, the thread take-up lever 301, the driving lever 302, the driving shaft 4, the first thread take-up driving mechanism 5, the first eccentric cam or cam groove 501, the first driving arm 502, the second thread take-up driving mechanism 6, the second eccentric cam or cam groove 601, the second driving arm 602, the double driving cam 7, the switching member 8, the first sliding structure 9, the first sliding convex block 901, the first sliding groove 902, the second sliding structure 10, the second sliding convex block 1001, the second sliding groove 1002, and the driving structure 11. Detailed implementation mode

[0020] The following further describes the present utility model in conjunction with specific embodiments.

[0021] Refer to Figure 1 、 2 As shown in Figures 3 and 4, a switchable double thread take-up driving device includes a machine shell 1, a main shaft 2 provided on the machine shell 1, and a driving shaft 4 for driving the thread take-up mechanism 3 to take up the thread. The device further includes a first thread take-up driving mechanism 5 and a second thread take-up driving mechanism 6 suitable for different top threads. The first thread take-up driving mechanism 5 includes a first eccentric cam or cam groove 501 provided on the main shaft and a first driving arm 502 driven by the first eccentric cam or cam groove. The second thread take-up driving mechanism 6 includes a second eccentric cam or cam groove 601 provided on the main shaft and a second driving arm 602 driven by the second eccentric cam or cam groove. A switching member 8 capable of sliding and switching different driving arms to drive when the first and second driving arms are in the parking position is provided on the driving shaft 4. A first sliding structure 9 is provided between the first and second driving arms and the switching member. A second sliding structure 10 and a driver for driving the switching member 8 to slide are provided between the driving shaft 4 and the switching member.

[0022] In order to meet the requirements of different top threads, the movement trajectories of the driving arms driven by the first and second thread take-up driving mechanisms 6 are different. That is, the sizes of the cams or cam grooves of the first eccentric cam or cam groove 501 and the second eccentric cam or cam groove 601 need to be set according to the actual situation to drive the thread take-up lever to complete corresponding actions to adapt to different top threads.

[0023] In this embodiment, the driving member for driving the first driving arm is the first eccentric cam groove, and the driving member for driving the second driving arm is the second eccentric cam groove. A driving wheel is provided between the driving arm and the eccentric cam groove and can slide in the eccentric cam groove. When the eccentric cam groove rotates, it will drive the driving wheel, that is, the driving arm moves.

[0024] The described driver (not shown in the figure) drives the switching member 8 to be slidable on the drive shaft 4. By sliding and cooperating with the corresponding drive arms, the corresponding thread-taking-up drive mechanism drives the drive shaft 4 to rotate. The driver may include a rod member provided on the embroidery machine and connected to the connection holes provided on the switching member 8, and a power structure such as a nut-screw assembly equipped with a motor, a pneumatic cylinder, a hydraulic rod, etc. that can be realized currently to drive the rod member to drive the switching member 8 to slide. Of course, the driver may also be provided on each headstock.

[0025] The described first sliding structure 9 includes a first sliding convex block 901 and a first sliding groove 902, and the described second sliding structure 10 includes a second sliding convex block 1001 and a second sliding groove 1002.

[0026] The first sliding convex block 901 is provided on the switching member 8, and the first sliding groove 902 is provided at one end of the first and second drive arms that cooperate with the switching member 8. Or the first sliding groove 902 may also be provided on the switching member 8, and the first sliding convex block 901 that cooperates with the first sliding groove 902 is provided on the first and second drive arms. It is only necessary to ensure that the switching member 8 can be switched to cooperate with different thread-taking-up drive mechanisms by sliding.

[0027] The second sliding convex block 1001 is provided on the switching member 8, and the second sliding groove 1002 is provided on the drive shaft 4. Or the second sliding convex block 1001 is provided on the drive shaft 4, and the second sliding groove 1002 is provided on the switching member 8.

[0028] The described thread-taking-up mechanism 3 includes a thread-taking-up rod 301 and a drive rod 302 provided on the drive shaft 4 to drive the thread-taking-up of the thread-taking-up rod. A drive structure 11 is provided between the thread-taking-up rod 301 and the drive rod 302. The drive structure 11 includes a fork and a cam that cooperate with each other.

[0029] The main shaft 2 is driven to rotate by a motor or other driving device. When the main shaft 2 rotates, it will drive the first and second eccentric cams or cam grooves to rotate accordingly. One end of the first and second drive arms is correspondingly provided on the eccentric cam or in the cam groove. When the eccentric cam or cam groove rotates, the first and second drive arms will be driven to rotate around the corresponding rotation fulcrums.

[0030] When the switching member 8 slides and switches, the first and second thread-taking-up drive mechanisms are in the parking position. The parking position refers to the position where the first drive arm 502 and the second drive arm 602 are in a parallel state under the drive of different cams or cam grooves. At this time, the switching member 8 can cooperate with the first drive arm or the second drive arm as needed, and the first thread-taking-up drive mechanism or the second thread-taking-up drive mechanism drives the switching member 8 to swing. Since the switching member 8 is simultaneously connected to the drive shaft 4 through the second sliding structure 10, when the switching member 8 swings, the drive shaft 4 will rotate to drive the drive rod 302 provided on the drive shaft. The drive rod 302 drives the thread-taking-up rod 301 to take up the thread.

[0031] A double-drive cam 7 is provided on the main shaft. The first eccentric cam or cam groove 501 is provided on one side of the double-drive cam 7; the second eccentric cam or cam groove 601 is provided on the other side of the double-drive cam 7. The double-drive cam 7 is provided to drive the first drive arm and the second drive arm simultaneously, eliminating the need for a separate cam or cam groove, resulting in a simpler structure and saving space and materials at the same time.

[0032] Rollers matching the corresponding chutes are provided on the first sliding bump or / and the second sliding bump.

[0033] As described above, the above is only the specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed by the present invention should be covered by the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A switchable double thread take-up drive mechanism, comprising a housing (1), a main shaft (2) disposed on the housing (1), and a drive shaft (4) for driving a thread take-up mechanism (3) to take up threads, characterized in that: The invention also comprises a first thread taking-up driving mechanism (5) and a second thread taking-up driving mechanism (6) suitable for different surface threads. The first thread taking-up driving mechanism (5) comprises a first eccentric cam or cam groove (501) arranged on the main shaft, and a first driving arm (502) driven by the first eccentric cam or cam groove; the second thread taking-up driving mechanism (6) comprises a second eccentric cam or cam groove (601) arranged on the main shaft, and a second driving arm (602) driven by the second eccentric cam or cam groove; the first and second driving arms are provided with corresponding rotation fulcrums; the driving shaft (4) is provided with a switching member (8) which can slide and switch between driving different driving arms when the first and second driving arms are in the parking position; a first sliding structure (9) is provided between the first and second driving arms and the switching member; a second sliding structure (10) and a driver for driving the switching member (8) to slide are provided between the driving shaft (4) and the switching member.

2. The switchable dual thread take-up drive mechanism according to claim 1, characterized in that: The first sliding structure (9) comprises a first sliding protrusion (901) and a first sliding groove (902), and the second sliding structure (10) comprises a second sliding protrusion (1001) and a second sliding groove (1002).

3. The switchable dual thread-taking drive mechanism according to claim 2, characterized in that: The first sliding protrusion (901) is arranged on the switching member (8), and the first sliding groove (902) is arranged at one end where the first and second driving arms cooperate with the switching member (8).

4. The switchable dual thread take-up drive mechanism according to claim 2, characterized in that: The second sliding protrusion (1001) is arranged on the switching member (8), and the second sliding groove (1002) is arranged on the driving shaft (4).

5. The switchable dual thread take-up drive mechanism according to claim 1, characterized in that: The thread taking-up mechanism (3) comprises a thread taking-up rod (301) and a driving rod (302) arranged on the driving shaft (4) and driving the thread taking-up rod to take up the thread.

6. The switchable double thread take-up drive mechanism according to claim 5, characterized in that: A driving structure (11) is provided between the thread take-up rod (301) and the driving rod (302).

7. The switchable dual thread take-up drive mechanism according to claim 2, characterized in that: A double driving cam (7) is provided on the main shaft, the first eccentric cam or cam groove (501) is provided on one side of the double driving cam (7), and the second eccentric cam or cam groove (601) is provided on the other side of the double driving cam (7).

8. The switchable dual thread take-up drive mechanism according to claim 2, characterized in that: The first sliding protrusion (901) and / or the second sliding protrusion (1001) are provided with a roller that matches the corresponding sliding groove.

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