Computerized embroidery machine
By introducing a secondary shaft and balancing structure into the computerized embroidery machine, combined with a hollow secondary shaft and synchronous belt mechanism, the vibration and noise problems of the embroidery machine under high-speed operation and high number of machine heads have been solved, achieving higher operational stability and precision.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ZHEJIANG MAYA MECHANICAL & ELECTRICAL TECH CO LTD
- Filing Date
- 2025-04-05
- Publication Date
- 2026-04-28
AI Technical Summary
Existing computerized embroidery machines experience increased vibration, noise, and shortened component lifespan when operating at high speeds and with a high number of machine heads. Furthermore, the machine's precision and stability are affected.
By employing a secondary shaft and a first balancing structure, and through the cooperation of the balance block and guide column, the vibration of the eccentric cam rotation and the needle bar driver is suppressed. Combined with the hollow secondary shaft and synchronous belt mechanism, the machine's operational stability and accuracy are improved.
It effectively suppresses the vibration of the eccentric cam rotation and the needle bar driver, improves the operational stability and precision of the computerized embroidery machine, reduces noise, extends the life of parts, and improves assembly efficiency.
Smart Images
Figure CN224173031U_ABST
Abstract
Description
Technical Field
[0001] This utility model generally relates to the field of computerized embroidery machine technology, and more particularly to a computerized embroidery machine. Background Technology
[0002] In the field of computerized embroidery machine technology, the working principle of an embroidery machine is that the main motor drives the upper shaft to rotate via a belt. The rotation of the upper shaft drives the eccentric cam of the machine head fixed on it to rotate. The eccentric cam drives the rocker arm to drive the needle bar driver to move up and down. Then, the needle bar driver drives the needle bar to move up and down, thereby driving the fixed needle to carry the embroidery thread through the fabric and cooperate with the rotary hook below.
[0003] However, the above method has drawbacks: during the entire operation of the machine head, both the rotation of the eccentric cam and the up-and-down movement of the needle bar will generate centrifugal forces and centrifugal couples in different directions that are constantly changing, i.e., imbalance. This is not obvious when the machine speed is low and the number of machine heads is small, but the embroidery market's requirements for embroidery machine speed and number of heads are constantly increasing. The speed of embroidery machines has increased from 750 rpm to the current maximum of 1500 rpm, a full doubling. The number of machine heads in an embroidery machine has increased from 28 heads to the current maximum of 250 heads, a several-fold increase. This has caused a sharp increase in imbalance, directly resulting in problems such as: increased machine vibration, increased noise, increased embroidery thread breakage, a rapid shortening of parts life, and a greatly increased maintenance rate. Utility Model Content
[0004] This application aims to provide a computerized embroidery machine that at least suppresses vibrations caused by the rotation of an eccentric cam, thereby improving the operational stability of the computerized embroidery machine and ensuring its precision; at the same time, the balancing mechanism is easy to install and is not affected by the distance between two adjacent machine heads.
[0005] This utility model provides a computerized embroidery machine, including: a housing, an upper shaft, and a secondary shaft.
[0006] The housing is provided with a cam assembly; the upper shaft passes through multiple housings, and multiple cam assemblies are arranged on the upper shaft; the secondary shaft is located outside the housing, and the secondary shaft is arranged parallel to the upper shaft, and multiple first balancing structures are arranged on the secondary shaft, each of the first balancing structures corresponding to at least one of the cam assemblies.
[0007] As an alternative implementation, a second balancing structure is also included. The second balancing structure includes a balancing block, and the first balancing structure is a first balancing cam connected to the balancing block, causing the balancing block to reciprocate in the vertical direction.
[0008] As an alternative implementation, the second balancing structure further includes a guide frame and a guide post, the guide post being mounted on the guide frame and extending vertically, and the balancing block engaging with the guide post in a guiding manner.
[0009] As an implementation, each of the first balancing structures is configured corresponding to one of the cam assemblies.
[0010] Alternatively, each of the first balancing structures may be configured corresponding to two of the cam assemblies, with the first balancing structure located at the middle position of the two cam assemblies; or, each of the first balancing structures may be configured corresponding to three of the cam assemblies, with the first balancing structure corresponding to the cam assembly at the middle position.
[0011] As an alternative implementation, a first belt mechanism is also included. The first belt mechanism includes a first synchronous pulley and a second synchronous pulley, one of which is mounted on the upper shaft and the other is mounted on the secondary shaft.
[0012] As one possible implementation, two first belt mechanisms are provided, with the two first belt mechanisms respectively located near both ends of the secondary shaft.
[0013] As an implementation method, the secondary shaft is a hollow shaft, the diameter of the secondary shaft is greater than or equal to that of the upper shaft, and the length between the two outermost cam assemblies of the plurality of cam assemblies is less than the length of the secondary shaft.
[0014] Alternatively, the secondary shaft may be located above or below the housing.
[0015] As an alternative implementation, a second belt mechanism is also included, which engages with the middle position of the secondary shaft to allow the secondary shaft to rotate.
[0016] The above solution improves the operational stability and ensures the precision of the computerized embroidery machine by suppressing vibrations caused by the rotation of the eccentric cam through the first balancing structure. The sub-shaft is located outside the machine housing, either above or below it, ensuring that the sub-shaft and the first balancing structure are unaffected by the distance between adjacent machine heads, facilitating installation and improving assembly efficiency. The balance block suppresses vibrations caused by the movement of the presser foot driver and needle bar driver, further enhancing operational stability and ensuring precision. The sub-shaft diameter is greater than or equal to the upper shaft diameter. Increasing the sub-shaft diameter improves its bending and torsional strength, allowing it to withstand greater loads and reduce deformation caused by the load when bearing the torque and vibration generated by the eccentric cam. Furthermore, the hollow sub-shaft helps reduce shaft deflection, preventing a decrease in the motion precision of the first balancing cam due to bending deformation. Attached Figure Description
[0017] Other features, objects, and advantages of this application will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:
[0018] Figure 1 A partial schematic diagram of a computerized embroidery machine provided in an embodiment of this utility model;
[0019] Figure 2 A partial exploded view of a computerized embroidery machine provided for an embodiment of this utility model;
[0020] Figure 3 A partial left view of a computerized embroidery machine provided in an embodiment of this utility model;
[0021] Figure 4 This is a schematic diagram showing the connection between the first balancing cam and the second balancing structure provided in an embodiment of the present invention.
[0022] Figure 5 yes Figure 4 Exploded view;
[0023] Figure 6 This is a schematic diagram of the structure of the first belt mechanism provided in an embodiment of the present utility model;
[0024] Upper shaft 10, secondary shaft 20, first balancing structure 30, second balancing structure 40, balancing block 41, guide frame 43, guide column 42, support frame 44;
[0025] The machine housing 50, mounting base 60, main beam 70, first belt mechanism 81, first synchronous pulley 811, second synchronous pulley 812, first synchronous belt 813, tension pulley 814, and second belt mechanism 82. Detailed Implementation
[0026] The present application will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the relevant utility model and not intended to limit the scope of the utility model. Furthermore, it should be noted that, for ease of description, only the parts relevant to the utility model are shown in the accompanying drawings.
[0027] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.
[0028] At least see Figures 1-6 As shown, this invention provides a computerized embroidery machine, including: a housing 50, an upper shaft 10, a secondary shaft 20, a cam assembly, and a first balancing structure 30. The cam assembly is located inside the housing 50, and one cam assembly is provided in each housing 50.
[0029] The upper shaft 10 passes through multiple housings 50, and multiple cam assemblies are arranged on the upper shaft 10. The secondary shaft 20 is located outside the housing 50 and is arranged parallel to the upper shaft 10. Multiple first balancing structures 30 are arranged on the secondary shaft 20, and each first balancing structure 30 is correspondingly arranged with at least one cam assembly.
[0030] For example, four cam assemblies are arranged at equal intervals on the upper shaft 10, each cam assembly including a presser foot cam and a needle bar cam. A presser foot driver and a needle bar driver are also provided inside the housing 50.
[0031] The needle bar cam drives the needle bar actuator to reciprocate vertically via a related linkage mechanism, thereby causing the needle bar to reciprocate vertically. Similarly, the presser foot cam drives the presser foot actuator to reciprocate vertically via a related linkage mechanism, causing the presser foot to follow the needle bar in the vertical reciprocating motion. It should be noted that the number of cam assemblies arranged at equal intervals on the upper shaft 10 is not limited; those skilled in the art can select the appropriate number based on actual conditions.
[0032] The secondary shaft 20 is located outside and above the housing 50. Both ends of the secondary shaft 20 are rotatably connected to the front side of the main beam 70 via mounting bases 60. Four first balancing structures 30 are arranged at equal intervals on the secondary shaft 20, each corresponding to a cam assembly.
[0033] The presser foot cam and needle bar cam are eccentric cams. During rotation, the eccentric cams generate centrifugal force, which causes the entire machine head to vibrate, affecting the accuracy and operational stability of the computerized embroidery machine. In addition, as the number of machine heads arranged on the upper shaft 10 increases, the distance between two adjacent machine heads decreases, resulting in increased vibration, increased noise, and weakened operational stability of the computerized embroidery machine.
[0034] Based on this, the first balancing structure 30 is used to suppress vibrations caused by the rotation of the eccentric cam, thereby improving the operational stability of the computerized embroidery machine and ensuring its precision. Since the secondary shaft 20 is located outside and above the housing 50, the secondary shaft 20 and the first balancing structure 30 are not affected by the distance between adjacent machine heads, facilitating installation and improving the assembly efficiency of the computerized embroidery machine. The first balancing structure 30 is a first balancing cam, which is also an eccentric cam.
[0035] It should be noted that, in one embodiment, each first balancing cam is correspondingly arranged with two cam assemblies, and the first balancing cam is located in the middle position of the two cam assemblies. For example, four cam assemblies are equally spaced on the upper shaft 10: the first cam assembly to the fourth cam assembly; two first balancing cams are equally spaced on the secondary shaft 20. A first balancing cam is correspondingly arranged at the middle position of the first cam assembly and the second cam assembly, and another first balancing cam is correspondingly arranged at the middle position of the third cam assembly and the fourth cam assembly. The first balancing cam is used to suppress the vibration caused by the rotation of the first cam assembly and the second cam assembly; the second balancing structure 40 is used to suppress the vibration caused by the rotation of the third cam assembly and the fourth cam assembly. This arrangement not only improves the operational stability of the computerized embroidery machine and ensures the accuracy of the computerized embroidery machine, but also ensures that the secondary shaft 20 and the first balancing cam are not affected by the distance between two adjacent machine heads, making installation convenient, and also reduces production costs.
[0036] In another embodiment, each first balancing cam is correspondingly arranged with three cam assemblies, and the first balancing cam is also corresponding to the cam assembly in the middle position. For example, six cam assemblies are arranged at equal intervals on the upper shaft 10: the first cam assembly to the sixth cam assembly; two first balancing cams are arranged at equal intervals on the secondary shaft 20. One first balancing cam is correspondingly arranged for the first cam assembly, the second cam assembly, and the third cam assembly, and another first balancing cam is correspondingly arranged for the fourth cam assembly, the fifth cam assembly, and the sixth cam assembly. The first balancing cam is used to suppress vibrations caused by the rotation of the first cam assembly, the second cam assembly, and the third cam assembly; the second balancing structure 40 is used to suppress vibrations caused by the rotation of the fourth cam assembly, the fifth cam assembly, and the sixth cam assembly. This arrangement not only improves the operational stability of the computerized embroidery machine and ensures its accuracy, but also ensures that the secondary shaft 20 and the first balancing cam are not affected by the distance between adjacent machine heads, facilitating installation and reducing production costs.
[0037] In another embodiment, the secondary shaft 20 may be located outside and below the housing 50; alternatively, the secondary shaft 20 may be located outside the housing 50 and above the main beam 70; or alternatively, the secondary shaft 20 may be located outside the housing 50 and inside the cavity of the main beam 70. This arrangement further ensures that the secondary shaft 20 and the first balancing structure 30 are not affected by the distance between two adjacent machine heads, facilitating installation.
[0038] The following combinations Figures 1-6 Further description of the computerized embroidery machine:
[0039] The computerized embroidery machine also includes a second balancing structure 40. The second balancing structure 40 includes a balance block 41, which is connected to the first balancing structure 30, causing the balance block 41 to reciprocate vertically. Because the presser foot driver and needle bar driver reciprocate vertically, their movement causes vibration of the entire machine head, affecting the accuracy and operational stability of the computerized embroidery machine. The balance block 41 is used to suppress the vibration caused by the movement of the presser foot driver and needle bar driver, thereby improving the operational stability of the computerized embroidery machine and ensuring its accuracy.
[0040] In a specific embodiment, the first balancing cam corresponds one-to-one with the second balancing structure 40. The second balancing structure 40 includes a balancing block 41, a guide frame 43, a guide post 42, and a support frame 44. The support frame 44 is connected to the front side of the main beam 70, and the guide frame 43 is connected to the support frame 44. The guide post 42 is mounted on the guide frame 43, and the length of the guide post 42 extends vertically. The balancing block 41 is sleeved on the guide post 42, and the balancing block 41 slides on the guide post 42. With this arrangement, through the guiding engagement between the balancing block 41 and the guide post 42, the balancing block 41 reciprocates in the vertical direction, thereby suppressing the vibration caused by the movement of the presser foot driver, needle bar driver, presser foot, and needle bar.
[0041] The computerized embroidery machine also includes a first belt mechanism 81 and a second belt mechanism 82. The second belt mechanism 82 is engaged with the middle position of the secondary shaft 20, causing the secondary shaft 20 to rotate; the first belt mechanism 81 includes a first synchronous pulley 811 and a second synchronous pulley 812, one of which is installed on the upper shaft 10 and the other is installed on the secondary shaft 20.
[0042] In a specific embodiment, the computerized embroidery machine is provided with two first belt mechanisms 81. The two first belt mechanisms 81 are respectively located near both ends of the sub-shaft 20, or in other words, the two first belt mechanisms 81 are respectively located near both ends of the upper shaft 10. Each first belt mechanism 81 includes a first synchronous pulley 811, a second synchronous pulley 812, a first synchronous belt 813 wound around the first synchronous pulley 811 and the second synchronous pulley 812, and a tensioning pulley 814. The first synchronous pulley 811 is mounted on the sub-shaft 20, the second synchronous pulley 812 is mounted on the upper shaft 10, and the tensioning pulley 814 is used to tension the belt to ensure appropriate belt tension.
[0043] The second belt mechanism 82 includes a third synchronous pulley, a fourth synchronous pulley, and a second synchronous belt wound around the third and fourth synchronous pulleys. One of the third and fourth synchronous pulleys is mounted on the countershaft 20, and the other is located on the drive motor. The drive motor can be located on the rear side of the main beam 70. The second synchronous belt passes from the rear side of the main beam 70 to the front side of the main beam 70, and is correspondingly positioned at the middle of the countershaft 20 or the middle of the upper shaft 10. This arrangement results in a compact structure, good force distribution on the countershaft 20 or the upper shaft 10, and helps to extend the service life of the countershaft 20 or the upper shaft 10.
[0044] As an implementation method, the secondary shaft 20 is a hollow shaft, and the diameter of the secondary shaft 20 is greater than or equal to the diameter of the upper shaft 10.
[0045] Increasing the diameter of the secondary shaft 20 improves its bending and torsional strength, enabling it to withstand greater loads and reduce deformation caused by the load when bearing the torque and vibration generated by the eccentric cam. Furthermore, as a hollow shaft, the secondary shaft 20 helps reduce shaft deflection, preventing a decrease in the motion accuracy of the first balancing cam due to bending deformation.
[0046] As an implementation method, the length between the two outermost cam assemblies of the multiple cam assemblies is less than the length of the countershaft 20.
[0047] The length of the secondary shaft 20 can be approximately equal to the length of the upper shaft 10.
[0048] It should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer" used above to indicate orientation or positional relationships are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.
[0049] The above description is merely a preferred embodiment of this application and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of the utility model involved in this application is not limited to the technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the inventive concept. For example, technical solutions formed by substituting the above features with (but not limited to) technical features with similar functions disclosed in this application.
Claims
1. A computerized embroidery machine, characterized in that, include: A housing (50) is provided with a cam assembly inside the housing (50); An upper shaft (10) passes through a plurality of housings (50), and a plurality of cam assemblies are arranged on the upper shaft (10); A secondary shaft (20) is located outside the housing (50). The secondary shaft (20) is arranged parallel to the upper shaft (10). A plurality of first balancing structures (30) are arranged on the secondary shaft (20). Each first balancing structure (30) is correspondingly arranged with at least one of the cam assemblies.
2. The computerized embroidery machine according to claim 1, characterized in that, It also includes a second balancing structure (40), which includes a balancing block (41). The first balancing structure (30) is a first balancing cam, which is connected to the balancing block (41) so that the balancing block (41) reciprocates in the vertical direction.
3. The computerized embroidery machine according to claim 2, characterized in that, The second balancing structure (40) also includes a guide frame (43) and a guide post (42). The guide post (42) is mounted on the guide frame (43). The length of the guide post (42) extends in the vertical direction. The balancing block (41) is guided and cooperates with the guide post (42).
4. The computerized embroidery machine according to claim 1, characterized in that, Each of the first balancing structures (30) is provided with a corresponding cam assembly.
5. The computerized embroidery machine according to claim 1, characterized in that, Each of the first balancing structures (30) is configured corresponding to two of the cam assemblies, with the first balancing structure (30) located in the middle of the two cam assemblies; or, each of the first balancing structures (30) is configured corresponding to three of the cam assemblies, with the first balancing structure (30) corresponding to the cam assembly in the middle position.
6. The computerized embroidery machine according to claim 1, characterized in that, It also includes a first belt mechanism (81), which includes a first synchronous pulley (811) and a second synchronous pulley (812), one of which is mounted on the upper shaft (10) and the other is mounted on the secondary shaft (20).
7. The computerized embroidery machine according to claim 6, characterized in that, Two first belt mechanisms (81) are provided, and the two first belt mechanisms (81) are respectively located near the two ends of the secondary shaft (20).
8. The computerized embroidery machine according to any one of claims 1-7, characterized in that, The secondary shaft (20) is a hollow shaft, the diameter of the secondary shaft (20) is greater than or equal to that of the upper shaft (10), and the length between the two outermost cam assemblies of the plurality of cam assemblies is less than the length of the secondary shaft (20).
9. The computerized embroidery machine according to any one of claims 1-7, characterized in that, The subshaft (20) is located above or below the housing (50).
10. The computerized embroidery machine according to any one of claims 1-7, characterized in that, It also includes a second belt mechanism (82), which cooperates with the middle position of the secondary shaft (20) to make the secondary shaft (20) rotate.