Embroidery machine head
By adopting an eccentrically set needle bar and presser foot drive cam linkage transmission system in the embroidery machine head, the problems of part damage and excessive noise during high-speed movement are solved, achieving a stable and low-noise sewing effect.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ZHEJIANG ZHAOSHAN MECHANISM-ELECTRICITY CO LTD
- Filing Date
- 2025-04-15
- Publication Date
- 2026-04-17
AI Technical Summary
Existing embroidery machine heads suffer from parts damage and excessive vibration and noise due to insufficient material strength during high-speed operation, failing to meet the needs of modern embroidery.
The needle bar drive cam and presser foot drive cam are eccentrically positioned, and the linkage transmission system optimizes motion coordination, reduces vibration and improves sewing stability. This includes the use of a high-speed bearing crank structure and a linkage cross angle design to reduce impact and noise.
It effectively reduces vibration and noise during the movement of the sewing head, improves sewing performance and finished product quality, and ensures the stability and precision of the sewing process.
Smart Images
Figure CN224133348U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of embroidery machines, and more particularly to an embroidery machine head. Background Technology
[0002] With the development of the textile industry and the growth in demand for personalized customization, embroidery technology has been widely applied in various fields such as clothing, home textiles, footwear, and bags. Modern embroidery production mostly uses automated embroidery machines for pattern processing, with a control system driving the machine to complete complex pattern sewing. Throughout the embroidery process, the machine head, as the key component performing the embroidery actions, is responsible for driving the needle bar up and down, and working in conjunction with the shuttle bed and fabric feeding mechanism to complete continuous and precise embroidery operations. The performance of the machine head directly affects embroidery efficiency, pattern accuracy, and finished product quality; therefore, it is a crucial functional unit in the embroidery machine.
[0003] Existing embroidery machine heads typically include a main shaft assembly, needle bar drive mechanism, thread clamp mechanism, and thread trimming mechanism. A motor drives the main shaft to rotate, which in turn drives the needle bar to achieve high-frequency up-and-down movement, working in conjunction with the fabric feeding system to complete the sewing of the pattern. Some machine heads are also equipped with functions such as multi-needle switching, automatic thread trimming, and tension adjustment to adapt to diverse embroidery process requirements. However, the current structure of embroidery machines mainly uses POM engineering plastic as the motion control source for the presser foot. With the high-speed development of embroidery machines, due to material strength limitations, widespread component damage and excessive vibration and noise from mechanical impacts often occur during operation. The current structure can no longer meet the requirements of various applications. Therefore, this paper proposes an embroidery machine head to solve the above problems. Utility Model Content
[0004] To overcome the above shortcomings, this utility model provides an embroidery machine head, which aims to improve the problem of excessive noise in the prior art.
[0005] To achieve the above objectives, the present invention adopts the following technical solution:
[0006] An embroidery machine head includes a housing. A needle bar drive cam is rotatably connected inside the housing. A presser foot drive cam is rotatably connected to the side wall of the needle bar drive cam. A first connecting rod is provided on one side of the presser foot drive cam. The middle of the first connecting rod is connected to the presser foot drive cam via a pin. A fixing block is rotatably connected to the right side of the first connecting rod and is fixedly connected to the housing. A second connecting rod and a fourth connecting rod are provided inside the housing. The middle of the second connecting rod and one side of the fourth connecting rod are connected via pins. The left side of the first connecting rod is connected to the other side of the fourth connecting rod via a second pin. The left side of the second connecting rod is rotatably connected to the housing. A presser foot transmission connecting rod is rotatably connected inside the housing. A third connecting rod is rotatably connected to the left side of the presser foot transmission connecting rod. The right side of the second connecting rod and one side of the third connecting rod are rotatably connected.
[0007] As a further description of the above technical solution:
[0008] The needle bar drive cam is eccentrically positioned with respect to the housing, and the two are symmetrical.
[0009] As a further description of the above technical solution:
[0010] The housing is rotatably connected to a fifth link, and the middle part of the fifth link is rotatably connected to the needle bar drive cam.
[0011] As a further description of the above technical solution:
[0012] A guide rod is fixedly connected inside the outer shell, and a lifting block is slidably connected to the side wall of the guide rod. One side of the fifth connecting rod is located at the bottom of the lifting block, and the two are in contact with each other.
[0013] As a further description of the above technical solution:
[0014] A sliding rod is fixedly connected to one side of the lifting block, and a foot is slidably connected to the side wall of the sliding rod.
[0015] As a further description of the above technical solution:
[0016] The right side of the presser foot transmission linkage is located at the bottom of the foot frame, and the two are in contact with each other.
[0017] As a further description of the above technical solution:
[0018] An embroidery needle is provided at the bottom of the slide rod, and the side wall of the embroidery needle is slidably connected to the inside of the leg frame.
[0019] This utility model has the following beneficial effects:
[0020] In this invention, the movement stroke between the presser foot connecting rod and the slide rod reduces the vibration generated longitudinally during the vertical movement of the cam's rotational motion. Through the linkage transmission, the pressing time of the foot frame matches the coordination between the sewing mechanisms, effectively improving sewing performance. In addition, the linkage transmission makes the movement of the foot frame and the slide rod more coordinated, so that they are at the same speed at the moment of separation and contact, reducing the vibration generated by the impact between the mechanisms during movement, reducing noise and improving sewing quality. Attached Figure Description
[0021] Figure 1 This is a three-dimensional schematic diagram of an embroidery machine head according to the present invention;
[0022] Figure 2 This is a schematic diagram of the drive mechanism of an embroidery machine head according to the present invention;
[0023] Figure 3 This is a schematic diagram of the internal structure of the outer shell of an embroidery machine head according to the present invention.
[0024] Legend:
[0025] 1. Outer shell; 2. Needle bar drive cam; 3. Presser foot drive cam; 4. First connecting rod; 5. Pin one; 6. Second connecting rod; 7. Presser foot transmission connecting rod; 8. Third connecting rod; 9. Pin two; 10. Pin three; 11. Fourth connecting rod; 12. Fixing block; 13. Fifth connecting rod; 14. Lifting block; 15. Guide rod; 16. Slide rod; 17. Leg; 18. Embroidery needle. Detailed Implementation
[0026] 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.
[0027] Reference Figures 1-3This utility model provides an embodiment of an embroidery machine head, comprising a housing 1, a needle bar drive cam 2 rotatably connected inside the housing 1, a fifth connecting rod 13 rotatably connected inside the housing 1, the middle of the fifth connecting rod 13 being rotatably connected to the needle bar drive cam 2, a guide rod 15 fixedly connected inside the housing 1, a lifting block 14 slidably connected to the side wall of the guide rod 15, one side of the fifth connecting rod 13 being disposed at the bottom of the lifting block 14 and the two being in contact, a slide rod 16 fixedly connected to one side of the lifting block 14, a foot bracket 17 slidably connected to the side wall of the slide rod 16, the foot bracket 17 cooperating with the slide rod 16 through an embedded linear sliding sleeve to achieve low-friction linear guidance. To improve motion stability, an embroidery needle 18 is installed at the bottom of the slide bar 16. The side wall of the embroidery needle 18 is slidably connected to the inside of the foot bracket 17. The side wall of the needle bar drive cam 2 is rotatably connected to the presser foot drive cam 3. Both the needle bar drive cam 2 and the presser foot drive cam 3 adopt a high-speed bearing type crank structure. The needle bar drive cam 2 is eccentrically positioned with respect to the outer shell 1, and the two are symmetrical. The eccentric angle of the needle bar drive cam 2 is greater than that of the presser foot drive cam 3, so that the presser foot moves downward before the embroidery needle 18, thereby ensuring the stability of the sewing process. A first connecting rod 4 is provided on one side of the presser foot drive cam 3, and the middle part of the first connecting rod 4 is connected to the presser foot drive cam 3 by a pin 5. Next, a fixing block 12 is rotatably connected to the right side of the first connecting rod 4. The fixing block 12 is fixedly connected to the outer shell 1, serving as a fulcrum. A second connecting rod 6 and a fourth connecting rod 11 are located inside the outer shell 1. The middle of the second connecting rod 6 is connected to one side of the fourth connecting rod 11 via pin three 10. The left side of the first connecting rod 4 is connected to the other side of the fourth connecting rod 11 via pin two 9. The left side of the second connecting rod 6 is rotatably connected to the outer shell 1, serving as a fulcrum. When the intersection angle between the first connecting rod 4 and the fourth connecting rod 11 is between 178° and 182°, the second connecting rod 6 can be placed in its extreme position. This allows for a pause. Inside the outer casing 1, a presser foot drive linkage 7 is rotatably connected. The left side of the presser foot drive linkage 7 is rotatably connected to a third linkage 8. The right side of the second linkage 6 is rotatably connected to one side of the third linkage 8. The right side of the presser foot drive linkage 7 is located at the bottom of the foot bracket 17, and the two are in close contact. When the included angle between the second linkage 6 and the third linkage 8 is between 175° and 185°, the presser foot drive linkage 7 can be in a paused state, effectively achieving the effect of stabilizing the fabric pressure of the foot bracket 17 and stabilizing the sewing process. During transmission, the second linkage 6, the presser foot drive linkage 7, and the slide bar 16 maintain symmetrical movement, making the machine head run in a more balanced state.
[0028] Working principle: During the operation of this device, the needle bar drive cam 2 and the presser foot drive cam 3 located inside the outer shell 1 rotate simultaneously. Both adopt a high-speed bearing crank structure, and drive their respective transmission chains through their eccentric motion. The presser foot drive cam 3 first drives the first connecting rod 4 to deflect around the pin 5, and then drives the second connecting rod 6 to rotate with its left end and the rotating shaft of the outer shell 1 as the fulcrum. This rotation process further drives the presser foot transmission connecting rod 7 to deflect around its own central rotating shaft through the third connecting rod 8, thereby driving the foot 17 that is in contact with it to slide up and down along the slide rod 16 to achieve stable pressing of the fabric. At the same time, the deflection of the needle bar drive cam 2 drives the fifth connecting rod 13 to rotate around its left fixed fulcrum, and then contacts and adheres to the lifting block 14 through its right end, driving the lifting block 14 to slide up and down along the guide rod 15, and driving the slide rod 16 to move synchronously, and driving the embroidery needle 18 at the end to achieve stable vertical sewing action.
[0029] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. 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 comprising a housing (1), characterized in that: The outer shell (1) is rotatably connected to a needle bar drive cam (2). The side wall of the needle bar drive cam (2) is rotatably connected to a presser foot drive cam (3). A first connecting rod (4) is provided on one side of the presser foot drive cam (3). The middle part of the first connecting rod (4) is connected to the presser foot drive cam (3) by a pin (5). A fixing block (12) is rotatably connected to the right side of the first connecting rod (4). The fixing block (12) is fixedly connected to the outer shell (1). A second connecting rod (6) is provided inside the outer shell (1). A fourth link (11) is provided. The middle part of the second link (6) is connected to one side of the fourth link (11) by a pin three (10). The left side of the inside of the first link (4) is connected to the other side of the fourth link (11) by a pin two (9). The left side of the second link (6) is rotatably connected to the outer shell (1). The inside of the outer shell (1) is rotatably connected to a presser foot transmission link (7). The left side of the presser foot transmission link (7) is rotatably connected to a third link (8). The right side of the second link (6) is rotatably connected to one side of the third link (8).
2. A machine head for an embroidery machine according to claim 1, characterised in that: The needle bar drive cam (2) is eccentrically positioned with respect to the housing (1), and the two are symmetrical.
3. The machine head of claim 1, wherein: The outer casing (1) is rotatably connected to a fifth link (13), and the middle part of the fifth link (13) is rotatably connected to the needle bar drive cam (2).
4. A machine head for a needlepoint machine as claimed in claim 3, characterised in that: The outer shell (1) is fixedly connected to a guide rod (15), and a lifting block (14) is slidably connected to the side wall of the guide rod (15). The fifth connecting rod (13) is located on one side at the bottom of the lifting block (14), and the two are in contact with each other.
5. The embroidery machine head according to claim 4, characterized in that: A slide rod (16) is fixedly connected to one side of the lifting block (14), and a foot bracket (17) is slidably connected to the side wall of the slide rod (16).
6. A machine head for an embroidery machine according to claim 5, characterised in that: The right side of the presser foot transmission link (7) is located at the bottom of the foot (17), and the two are in contact.
7. An embroidery machine head according to claim 5, characterised in that: The bottom of the slide bar (16) is provided with an embroidery needle (18), and the side wall of the embroidery needle (18) is slidably connected to the inside of the leg (17).