A needle thread tension device for an embroidery machine

Abstract

The utility model discloses a kind of embroidery machine head driven by connecting rod rest mechanism presser foot, specifically relates to embroidery machine technical field, including head shell, the support plate is arranged in the bottom of head shell, support bearing is fixedly installed in the both sides of support plate, main shaft is arranged in the inside of support bearing, needle bar driving device is arranged in the bottom of main shaft one side, thread lifting lever driving device is arranged in the top of main shaft, presser foot driving device is arranged in the bottom of main shaft;The presser foot driving device includes presser foot eccentric wheel, and the presser foot eccentric wheel is fixedly installed in the outside of main shaft.The utility model is equipped with head shell, needle bar driving device and presser foot driving device and other structures, so that the utility model structure is simple, with long rest period and higher rest precision, can satisfy embroidery machine head presser foot lifting control, and can carry out super high speed embroidery, so that the actual use effect of the utility model is better.

Description

Technical Field

[0001] This utility model relates to the field of embroidery machine technology, and more specifically, to an embroidery machine head with a linkage stop mechanism driving the presser foot. Background Technology

[0002] In existing embroidery machine heads, the presser foot needs to pause for a specified time during the fabric pressing process. The presser foot movement is mostly controlled by a grooved wheel mechanism or a cam mechanism. Although the grooved wheel mechanism and cam mechanism can achieve the required pause time for the presser foot to press the fabric and have high precision, they are difficult to manufacture, have complex design methods, and are relatively expensive. Furthermore, the grooved wheel mechanism and cam mechanism are high-pair contact force transmission mechanisms, which are prone to wear and are not suitable for ultra-high-speed operation, and cannot meet the current ultra-high-speed embroidery requirements.

[0003] Therefore, there is an urgent need for an embroidery machine head with a linkage-driven stop mechanism to drive the presser foot, in order to solve the above problems. Utility Model Content

[0004] To overcome the aforementioned deficiencies of the prior art, embodiments of this utility model provide an embroidery machine head with a linkage-driven presser foot. By incorporating a machine head housing, a needle bar drive device, and a presser foot drive device, this utility model features a simple structure, a long pause period, and high pause accuracy. It can meet the requirements for presser foot lifting and lowering control of the embroidery machine head and can perform ultra-high-speed embroidery. This results in better practical performance of this utility model, thus solving the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an embroidery machine head with a linkage stop mechanism driving a presser foot, including a machine head shell, a support plate at the bottom of the machine head shell, support bearings fixedly installed on both sides of the support plate, a main shaft passing through the support bearings, a needle bar driving device at one bottom side of the main shaft, a thread take-up lever driving device at the top of the main shaft, and a presser foot driving device at the bottom of the main shaft; The presser foot drive device includes a presser foot eccentric wheel, which is fixedly mounted on the outside of the main shaft. A large connecting rod is provided on the outside of the presser foot eccentric wheel. A presser foot connecting rod pin is provided on one side of the bottom of the large connecting rod. A three-hole connecting rod is provided on the pin. A small connecting rod is provided at the bottom of the three-hole connecting rod away from the pin. A presser foot driver is provided on one side of the bottom of the small connecting rod. A drive shaft is internally installed in the driver. A presser foot spring is provided on the side of the drive shaft away from the main shaft. A foot spring is provided with a foot lifting sleeve at its bottom end, and a foot is provided at the bottom end of the foot lifting sleeve. A needle plate is provided at the bottom of the foot. An oil reservoir is provided on one side of the connection between the three-eye connecting rod of the foot and the small connecting rod of the foot. An oil reservoir and a guide bearing are respectively provided on both sides of the connection between the small connecting rod of the foot and the foot driver. A guide groove is provided on the side of the foot driver near the guide bearing. A needle bar is provided through the foot spring. A needle bar clamp is provided in the middle of the needle bar. The needle bar clamp is provided at the top of the foot spring. A thread take-up lever is provided at the top of the thread take-up lever drive device.

[0006] In a preferred embodiment, the main shaft is rotatably connected to the support plate via a support bearing, and the pressure foot eccentric wheel and the eccentric wheel connecting rod are rotatably connected via a bearing.

[0007] In a preferred embodiment, the bottom end of the eccentric wheel connecting rod of the presser foot is rotatably connected to the middle part of the three-eyed connecting rod of the presser foot.

[0008] In a preferred embodiment, the two ends of the presser foot connecting rod pin are rotatably connected to the presser foot three-eye connecting rod and the machine head housing, respectively, and the top end of the presser foot small connecting rod is rotatably connected to the other end of the presser foot three-eye connecting rod.

[0009] In a preferred embodiment, the bottom end of the presser foot connecting rod is rotatably connected to one side of the presser foot driver.

[0010] In a preferred embodiment, the needle bar clamping block is sleeved on the needle bar, and the bottom end of the needle bar is fixedly installed on the bottom of the presser foot lifting sleeve.

[0011] The technical effects and advantages of this utility model are as follows: This invention features a simple structure with a machine head housing, a needle bar drive device, and a presser foot drive device. It has a long pause period and high pause accuracy, can meet the lifting and lowering control of the presser foot of the embroidery machine head, and can perform ultra-high-speed embroidery, resulting in good practical performance. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0013] Figure 2This is a schematic diagram of the internal three-dimensional structure of the embroidery machine head of this utility model.

[0014] Figure 3 This is a three-dimensional structural diagram of the highest position of the presser foot of this utility model.

[0015] Figure 4 This is a three-dimensional structural diagram of the oil storage box and guide groove of this utility model.

[0016] Figure 5 This is a schematic diagram of the lowest position 1 of the presser foot of this utility model.

[0017] Figure 6 This is a schematic diagram of the lowest position 2 of the presser foot of this utility model.

[0018] Figure 7 This is a schematic diagram of the 360-degree presser foot motion curve of this utility model.

[0019] The attached figures are labeled as follows: 101. Head housing; 102. Support plate; 103. Support bearing; 104. Main shaft; 105. Needle bar drive device; 106. Thread take-up lever drive device; 107. Presser foot drive device; 201. Presser foot eccentric wheel; 202. Presser foot eccentric wheel main connecting rod; 203. Presser foot connecting rod pin; 204. Presser foot three-eye connecting rod; 205. Presser foot small connecting rod; 206. Presser foot driver; 207. Drive shaft; 208. Presser foot spring; 209. Presser foot lifting sleeve; 210. Presser foot; 211. Needle plate; 301. Oil reservoir one; 302. Oil reservoir two; 303. Guide bearing; 304. Guide groove; 401. Needle bar; 402. Needle bar clamp; 403. Thread take-up lever. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] As attached Figure 1-7As shown, this utility model provides an embroidery machine head with a linkage stop mechanism driving the presser foot, including a machine head housing 101, a support plate 102 at the bottom of the machine head housing 101, support bearings 103 fixedly installed on both sides of the support plate 102, a main shaft 104 passing through the support bearings 103, a needle bar drive device 105 at one bottom side of the main shaft 104, a thread take-up lever drive device 106 at the top of the main shaft 104, and a presser foot drive device 107 at the bottom of the main shaft 104; The presser foot drive device 107 includes a presser foot eccentric wheel 201, which is fixedly installed on the outside of the main shaft 104. A presser foot eccentric wheel large connecting rod 202 is provided on the outside of the presser foot eccentric wheel 201. A presser foot connecting rod pin 203 is provided on one side of the bottom of the presser foot eccentric wheel large connecting rod 202. A presser foot three-hole connecting rod 204 is provided on the presser foot three-hole connecting rod 204. A presser foot small connecting rod 205 is provided at the bottom of the end of the presser foot three-hole connecting rod 204 away from the presser foot connecting rod pin 203. A presser foot driver 206 is provided on one side of the bottom of the presser foot small connecting rod 205. A drive shaft 207 is provided through the presser foot driver 206. A presser foot spring 208 is provided on the side of the drive shaft 207 away from the main shaft 104. The bottom end is provided with a presser foot lifting sleeve 209, the bottom end of the presser foot lifting sleeve 209 is provided with a presser foot 210, the bottom of the presser foot 210 is provided with a needle plate 211, an oil storage box 301 is provided on one side of the connection between the presser foot three-eye connecting rod 204 and the presser foot small connecting rod 205, an oil storage box 302 and a guide bearing 303 are respectively provided on both sides of the connection between the presser foot small connecting rod 205 and the presser foot driver 206, the presser foot driver 206 is provided with a guide groove 304 on the side near the guide bearing 303, a needle bar 401 is provided through the presser foot spring 208, a needle bar clamping block 402 is provided in the middle of the needle bar 401, the needle bar clamping block 402 is provided at the top of the presser foot spring 208, and a thread take-up lever 403 is provided at the top of the thread take-up lever driving device 106.

[0022] The main shaft 104 is rotatably connected to the support plate 102 via the support bearing 103, and the presser foot eccentric wheel 201 is rotatably connected to the eccentric wheel connecting rod 202 via the bearing.

[0023] The bottom end of the eccentric wheel connecting rod 202 of the presser foot is rotatably connected to the middle part of the three-eyed connecting rod 204 of the presser foot.

[0024] The two ends of the presser foot connecting rod pin 203 are rotatably connected to the presser foot three-eye connecting rod 204 and the machine head housing 101, respectively, and the top end of the presser foot small connecting rod 205 is rotatably connected to the other end of the presser foot three-eye connecting rod 204.

[0025] The bottom end of the small connecting rod 205 of the presser foot is rotatably connected to one side of the presser foot driver 206.

[0026] The needle bar clamp 402 is sleeved on the needle bar 401, and the bottom end of the needle bar 401 is fixedly installed on the bottom of the presser foot lifting sleeve 209.

[0027] The specific implementation method is as follows: When using this utility model, the presser foot eccentric wheel 201 is fixed in the main shaft 104. When the main shaft 104 rotates, it drives the presser foot eccentric wheel 201 to rotate together. The presser foot eccentric wheel 201 is sleeved with a presser foot eccentric wheel connecting rod 202. The presser foot eccentric wheel 201 and the presser foot eccentric wheel connecting rod 202 are designed as bearings to meet ultra-high speed motion. The small end of the presser foot eccentric wheel connecting rod 202 is connected to the middle hole of the presser foot three-hole connecting rod 204. One end of the presser foot three-hole connecting rod 204 is fixed to the machine head housing 101 by a presser foot connecting rod pin 203. The rotation of the presser foot eccentric wheel 201 drives the presser foot eccentric wheel connecting rod 202 to swing. The presser foot eccentric wheel 201 and the presser foot eccentric wheel connecting rod 202, as a linkage mechanism, have a certain period of pause. The other end of the presser foot three-hole connecting rod 204... One end of the presser foot small connecting rod 205 is connected to the other end of the presser foot driver 206. The presser foot driver 206 drives the presser foot lifting sleeve 209 to move. The presser foot lifting sleeve 209 is fixed to the presser foot 210. When the presser foot lifting sleeve 209 moves, it drives the presser foot 210 to move together. The presser foot three-eye connecting rod 204 and the presser foot small connecting rod 205, as a linkage mechanism, also have a certain pause time. This pause time, in coordination with the pause time of the presser foot eccentric wheel 201 and the presser foot eccentric wheel large connecting rod 202, can meet the pause time requirements when the presser foot is working. By adjusting the matching dimensions of the presser foot eccentric wheel 201, the presser foot eccentric wheel large connecting rod 202, the presser foot three-eye connecting rod 204, and the presser foot small connecting rod 205, the pause time required for the linkage mechanism to control the presser foot 210 can be obtained. The pause time of the linkage is as follows: Figure 5 presser foot lowest position 1 and such Figure 6 Between the lowest position 2 of the presser foot, such as Figure 5 He Ru Figure 6 As shown, the spindle rotation angle is between a and b, with the presser foot in a near-stationary state, satisfying the presser foot descent motion rules of the embroidery machine head. A support plate 102 and a support bearing 103 are designed on one side of the machine head housing 101 to ensure the rotational stability of the presser foot eccentric wheel 201 and meet the ultra-high-speed motion requirements of the presser foot mechanism. An oil reservoir 301 is designed on the presser foot three-eye connecting rod 204 to provide lubrication at the connection between the presser foot three-eye connecting rod 204 and the presser foot small connecting rod 205. The presser foot driver 206 is designed with... There is an oil reservoir 302, which can provide lubrication at the connection between the presser foot connecting rod 205 and the presser foot driver 206. The presser foot connecting rod 205 can be a bearing or bushing, etc., to meet the ultra-long time and ultra-high speed movement of the presser foot mechanism. The presser foot driver 206 is connected to the guide bearing 303, which is located in the guide groove 304. During movement, the guide bearing 303 moves in the guide groove 304 to ensure the stability of the presser foot driver 206 and meet the ultra-high speed movement of the presser foot mechanism.

[0028] Working principle of this utility model: Refer to the instruction manual appendix Figure 1-7 When using this utility model, the structure of the machine head housing 101, needle bar drive device 105 and presser foot drive device 107 makes the structure of this utility model simple, with a long pause period and high pause accuracy. It can meet the lifting and lowering control of the presser foot of the embroidery machine head and can perform ultra-high speed embroidery, so the actual use effect of this utility model is good.

[0029] Finally, the following points should be noted: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installation", "connection", and "linkage" should be interpreted broadly, and can be mechanical or electrical connections, or internal connections between two components, or direct connections. "Up", "down", "left", "right", etc. are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may change. Secondly: The accompanying drawings of the embodiments disclosed in this utility model only involve the structures involved in the embodiments disclosed in this utility model. Other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of this utility model can be combined with each other. Finally: The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An embroidery machine head with a linkage-driven stop mechanism for driving the presser foot, comprising a head housing (101), characterized in that: The bottom of the machine head housing (101) is provided with a support plate (102), and support bearings (103) are fixedly installed on both sides of the support plate (102). A main shaft (104) is provided through the support bearings (103). A needle bar drive device (105) is provided on one side of the bottom of the main shaft (104). A thread take-up lever drive device (106) is provided on the top of the main shaft (104). A presser foot drive device (107) is provided at the bottom of the main shaft (104). The presser foot drive device (107) includes a presser foot eccentric wheel (201), which is fixedly installed on the outside of the main shaft (104). A presser foot eccentric wheel large connecting rod (202) is provided on the outside of the presser foot eccentric wheel (201). A presser foot connecting rod pin (203) is provided on one side of the bottom of the presser foot eccentric wheel large connecting rod (202). A presser foot three-eye connecting rod (204) is provided on the presser foot connecting rod pin (203). A presser foot small connecting rod (205) is provided at the bottom of the end of the presser foot three-eye connecting rod (204) away from the presser foot connecting rod pin (203). A presser foot driver (206) is provided on one side of the bottom of the presser foot small connecting rod (205). A drive shaft (207) is provided through the inside of the presser foot driver (206). A presser foot spring (208) is provided on the side of the drive shaft (207) away from the main shaft (104). The bottom of the presser foot spring (208) is... A presser foot lifting sleeve (209) is provided, and a presser foot (210) is provided at the bottom end of the presser foot lifting sleeve (209). A needle plate (211) is provided at the bottom of the presser foot (210). An oil storage box (301) is provided on one side of the connection between the presser foot three-eye connecting rod (204) and the presser foot small connecting rod (205). An oil storage box (302) and a guide bearing (303) are respectively provided on both sides of the connection between the presser foot small connecting rod (205) and the presser foot driver (206). A guide groove (304) is provided on the side of the presser foot driver (206) near the guide bearing (303). A needle bar (401) is provided through the presser foot spring (208). A needle bar clamp (402) is provided in the middle of the needle bar (401). The needle bar clamp (402) is located at the top of the presser foot spring (208). A thread take-up rod (403) is provided at the top of the thread take-up rod drive device (106).

2. The embroidery machine head with a linkage stop mechanism driving the presser foot according to claim 1, characterized in that: The main shaft (104) is rotatably connected to the support plate (102) through the support bearing (103), and the presser foot eccentric wheel (201) and the eccentric wheel connecting rod (202) are rotatably connected through the bearing.

3. The embroidery machine head with a linkage stop mechanism driving the presser foot according to claim 1, characterized in that: The bottom end of the eccentric wheel connecting rod (202) of the presser foot is rotatably connected to the middle part of the three-eyed connecting rod (204) of the presser foot.

4. The embroidery machine head with a linkage stop mechanism driving the presser foot according to claim 1, characterized in that: The two ends of the presser foot connecting rod pin (203) are rotatably connected to the presser foot three-eye connecting rod (204) and the machine head housing (101) respectively, and the top end of the presser foot small connecting rod (205) is rotatably connected to the other end of the presser foot three-eye connecting rod (204).

5. The embroidery machine head with a linkage stop mechanism driving the presser foot according to claim 1, characterized in that: The bottom end of the small connecting rod (205) of the presser foot is rotatably connected to one side of the presser foot driver (206).

6. The embroidery machine head with a linkage stop mechanism driving the presser foot according to claim 1, characterized in that: The needle bar clamp (402) is sleeved on the needle bar (401), and the bottom end of the needle bar (401) is fixedly installed on the bottom of the presser foot lifting sleeve (209).

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