Multi-head embroidery machine and its spindle drive structure

Abstract

This utility model discloses a multi-head embroidery machine and its main shaft drive structure, relating to embroidery machine technology. It avoids the impact of small head spacing on increasing belt width and solves the problem of belt breakage caused by narrow belts. The main shaft drive structure includes at least two machine heads mounted side-by-side laterally on the front side of a main beam, a main shaft passing laterally through the at least two machine heads, a main motor located on the rear side of the main beam, and a main shaft transmission mechanism connecting the main motor and the main shaft. The main shaft transmission mechanism includes a belt drive assembly and a gear drive assembly. The gear drive assembly is located in the gap between two adjacent machine heads and connected to the main shaft. The belt drive assembly is driven by the main motor and connected to the gear drive assembly.

Description

Technical Field

[0001] This utility model belongs to the technical field of embroidery equipment, specifically relating to embroidery machines. Background Technology

[0002] Currently, multi-head embroidery machines commonly use belt drives to connect the main spindle motor and the main spindle. The main spindle motor is located at the rear of the main beam, and at least two embroidery heads are mounted side-by-side at the front of the main beam. The main spindle passes laterally through at least two embroidery heads, allowing one main spindle to drive multiple embroidery heads. A belt drive assembly connects the main spindle motor and the main spindle, with the portion of the belt drive assembly located in the gap between adjacent embroidery heads at the front of the main beam. However, as the number of embroidery heads in multi-head embroidery machines increases, the head spacing (distance between two adjacent embroidery heads) gradually decreases. Due to the smaller head spacing, the space between adjacent embroidery heads is limited, necessitating a narrower design for the transmission belt in the belt drive assembly. This not only reduces transmission efficiency but also increases the risk of belt breakage. Utility Model Content

[0003] To address the shortcomings of existing technologies, the present invention aims to provide a multi-head embroidery machine and its main shaft drive structure, thereby avoiding the impact of small head spacing on the increase of belt width and solving the problem that narrow belts are prone to breakage.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0005] First, a multi-head embroidery machine spindle drive structure is provided, including at least two machine heads installed side by side in the transverse direction on the front side of a main beam, a main shaft passing through the at least two machine heads in the transverse direction, a main motor located on the rear side of the main beam, and a spindle transmission mechanism connecting the main motor and the main shaft. The spindle transmission mechanism includes a belt drive assembly and a gear drive assembly. The gear drive assembly is located in the gap between two adjacent machine heads and is connected to the main shaft. The belt drive assembly is driven by the main motor and connected to the gear drive assembly. The belt drive assembly is offset from the machine heads.

[0006] Preferably, the gear transmission assembly includes a driving gear and a driven gear, the driven gear is mounted on the main shaft, the driving gear is mounted on the auxiliary shaft, and the auxiliary shaft is connected to the belt transmission assembly.

[0007] Preferably, the auxiliary shaft is located above the machine head, and the belt drive assembly is offset from the machine head.

[0008] Preferably, bearing seats are provided at lateral intervals along the front side of the main beam, and the auxiliary shaft is rotatably supported on the bearings within the bearing seats.

[0009] Preferably, both the driving gear and the driven gear are double helical gears, and the helical teeth between the two helical gears form a V-shaped tooth.

[0010] Preferably, the belt drive assembly includes a driven pulley mounted on the auxiliary shaft, a driving pulley driven by the output shaft of the main motor, and a drive belt connecting the driving pulley and the driven pulley.

[0011] Preferably, the width of the drive belt is greater than the gap width between two adjacent machine heads.

[0012] Preferably, the belt drive assembly passes through the transverse middle region of the beam, and the gear drive assembly is transversely close to the belt drive assembly.

[0013] Preferably, a speed reducer is provided between the main motor and the belt drive assembly, wherein the output shaft of the main motor is connected to the input end of the speed reducer, and the output shaft of the speed reducer is connected to the belt drive assembly.

[0014] In addition, this utility model also provides an embroidery machine head, including the aforementioned thread clamp take-up spring adjustment structure.

[0015] The present invention adopts the above technical solution and has the following technical effects:

[0016] 1. This utility model transforms the traditional belt drive method into a composite transmission structure combining a belt drive assembly and a gear drive assembly. Because gear drives are compact, reliable, and have a long service life, and especially because gears can be designed to be relatively narrow, they can accommodate small gaps between adjacent machine heads. Thus, the gear drive assembly is placed within the gap between two adjacent machine heads. By offsetting the belt drive assembly from the machine head, interference with the machine head is eliminated, avoiding the limitation of increasing belt width due to small head spacing. This allows for increasing the width of the transmission belt as needed, effectively solving the problem of limited space preventing belt widening, significantly improving transmission efficiency, and greatly reducing the risk of belt breakage.

[0017] 2. An auxiliary shaft is added outside the main shaft. The driving gear and the driven pulley are installed on the auxiliary shaft, thereby connecting the belt drive assembly and the gear drive assembly. The driven pulley drives the auxiliary shaft to rotate, and the auxiliary shaft drives the driving gear.

[0018] 3. Since bearing seats are provided at transverse intervals on the front side of the main beam, the auxiliary shaft is rotatably supported on the bearings in the bearing seats, which can ensure stable support for the auxiliary shaft, guarantee the rigidity of the auxiliary shaft, and ensure the transmission stability of the belt drive assembly and gear drive assembly.

[0019] 4. Since both the driving gear and the driven gear are double helical gears, the helical teeth between the two helical gears form a V-shaped tooth. This increases the load-bearing capacity, reduces vibration and noise, improves the contact rate and transmission efficiency, and the symmetrical tooth arrangement helps to compensate for slight misalignment, ensuring smooth gear meshing and preventing premature wear.

[0020] 5. The width of the drive belt is greater than the gap between two adjacent machine heads. Therefore, the drive belt can be set wider, at least wider than the gap between two adjacent machine heads, solving the problem of belt breakage caused by narrow drive belts.

[0021] 6. Since the main shaft needs to drive multiple machine heads simultaneously, the belt drive assembly can pass through the transverse middle area of ​​the main beam, while the gear drive assembly is positioned transversely close to the belt drive assembly. This allows the gear drive assembly to drive the main shaft to rotate from the middle. In this way, the number of machine heads on both sides of the gear drive assembly can be exactly the same or approximately equal, resulting in a more balanced force on both sides of the main shaft, which helps reduce vibration and noise.

[0022] 7. A speed reducer can be installed between the main motor and the belt drive assembly. This speed reducer can reduce the speed, increase the torque, and has the functions of buffering and overload protection, as well as improving transmission stability.

[0023] These features and advantages of the present invention will be disclosed in detail in the following specific embodiments and accompanying drawings. Attached Figure Description

[0024] The utility model will be further described below with reference to the accompanying drawings:

[0025] Figure 1 This is a schematic diagram of the main shaft drive structure of the multi-head embroidery machine of this utility model;

[0026] Figure 2 This is a schematic diagram of the main shaft drive structure of the multi-head embroidery machine of this utility model;

[0027] Figure 3 This is a schematic diagram of the main shaft drive structure of the multi-head embroidery machine of this utility model;

[0028] Figure 4 This is a schematic diagram of the main shaft drive structure of the multi-head embroidery machine of this utility model;

[0029] Figure 5 This is a schematic diagram of the gear transmission assembly structure in this utility model;

[0030] Reference numerals: machine head 1, main beam 100, first through hole 101, second through hole 102, main shaft 11, main motor 12, reducer 13, main shaft transmission mechanism 2, belt transmission assembly 21, driven pulley 211, transmission belt 212, driving pulley 213, tension pulley 214, gear transmission assembly 22, driving gear 221, driven gear 222, auxiliary shaft 23, bearing seat 24. Detailed Implementation

[0031] The technical solutions of the present utility model will be explained and described below with reference to the accompanying drawings. However, the following embodiments are only preferred embodiments of the present utility model and not all of them. Other embodiments obtained by those skilled in the art based on the embodiments in the implementation methods without creative effort are all within the protection scope of the present utility model.

[0032] Those skilled in the art will understand that, without conflict, the features in the following embodiments and implementations can be combined with each other.

[0033] The terminology used in this invention is for the purpose of describing particular embodiments only and is not intended to limit the invention. For example, terms such as "upper," "lower," "front," "rear," and "lateral," which indicate orientation or positional relationship, are based solely on the orientation or positional relationship shown in the accompanying drawings and are used only for the convenience of describing the invention and simplifying the description. They do not indicate or imply that the device / component referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as limiting the invention.

[0034] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "fixation," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0035] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0036] Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features.

[0037] like Figures 1 to 5As shown, this embodiment provides a main shaft drive structure for a multi-head embroidery machine. The structure includes at least two machine heads 1 mounted side-by-side laterally on the front side of a main beam 100, a main shaft 11 passing laterally through the at least two machine heads 1, a main motor 12 located on the rear side of the main beam 100, and a main shaft transmission mechanism 2 connecting the main motor 12 and the main shaft 11. The main shaft transmission mechanism 2 includes a belt drive assembly 21 and a gear drive assembly 22. The gear drive assembly 22 is located in the gap between two adjacent machine heads 1 and connected to the main shaft 11. The belt drive assembly 21 is driven by the main motor 12 and connected to the gear drive assembly 22.

[0038] Here, the extension direction of the main beam 100 is defined as "lateral". It is understood that the belt drive assembly 21 is offset from the machine head 1 to avoid interference. The belt drive assembly 21 can be positioned corresponding to the gap between two adjacent machine heads 1, that is, above the gap between two adjacent machine heads 1.

[0039] This invention transforms the traditional belt drive into a composite transmission structure combining a belt drive assembly and a gear drive assembly. Gear drives are compact, reliable, and have a long service life. Furthermore, the gears can be designed to be relatively narrow, thus accommodating small gaps between adjacent machine heads. The gear drive assembly is placed within this gap. By offsetting the belt drive assembly from the machine head, interference with the machine head is eliminated, preventing the narrow head-to-head distance from affecting belt width. This allows for increasing the belt width as needed, effectively solving the problem of limited space preventing belt widening, significantly improving transmission efficiency, and greatly reducing the risk of belt breakage.

[0040] The gear transmission assembly 22 includes a driving gear 221 and a driven gear 222. The driven gear 222 is mounted on the main shaft 11, and the driving gear 221 is mounted on the auxiliary shaft 23. The auxiliary shaft 23 is connected to the belt transmission assembly 21. The auxiliary shaft 23 is located above the machine head 1, and the belt transmission assembly 21 is offset from the machine head 1. An auxiliary shaft is added outside the main shaft, and the driving gear 221 and the driven pulley 211 are mounted on the auxiliary shaft 23, thereby connecting the belt transmission assembly 21 and the gear transmission assembly 22. The driven pulley drives the auxiliary shaft to rotate, and the auxiliary shaft drives the driving gear.

[0041] The main beam is usually a hollow structure. Here, a second through hole 102 can be set on the front side of the main beam corresponding to the position of the drive gear. In this way, the radial outer side of the drive gear 221 can be partially located in the second through hole, which is beneficial to increasing the diameter of the drive gear.

[0042] Understandably, it is possible to set only one driving gear and one driven gear. Since the driving gear is coaxially mounted on the auxiliary shaft with the driven pulley, in order to offset the belt drive assembly from the machine head as much as possible, a driven gear can also be added in the middle, thus forming a multi-stage gear transmission structure of driving gear, driven gear one, and driven gear two.

[0043] Furthermore, the driven gear 222 is mounted on the main shaft 11 via a clamp on one side, and the driving gear 221 is mounted on the auxiliary shaft 23 via a clamp on one side, with the clamps of both gears being arranged on opposite sides of the axial direction.

[0044] In addition, bearing seats 24 are provided at lateral intervals along the front side of the main beam 100, and the auxiliary shaft 23 is rotatably supported on the bearings in the bearing seats. For example, bearing seats 24 are provided on both sides of the driven pulley 211 and on both sides of the driving gear 221 to ensure stable support for the auxiliary shaft, ensure the rigidity of the auxiliary shaft, and ensure the transmission stability of the belt drive assembly and the gear drive assembly.

[0045] Preferably, both the driving gear 221 and the driven gear 222 are double helical gears, with the helical teeth between the two helical gears forming a V-shaped tooth pattern. This increases load-bearing capacity, reduces vibration and noise, improves contact rate and transmission efficiency, and the symmetrical tooth arrangement helps compensate for slight misalignment, ensuring smooth gear meshing and preventing premature wear.

[0046] Specifically, the belt drive assembly 21 includes a driven pulley 211 mounted on the auxiliary shaft 23, a driving pulley 213 driven by the output shaft of the main motor, and a transmission belt 212 connecting the driving pulley and the driven pulley. Thus, the driven pulley 211 and the driving gear 221 are coaxially arranged, realizing the transmission connection between the belt drive assembly and the gear drive assembly. The driven pulley 211 is located on the front side of the main beam, and the driving pulley 213 is located on the rear side of the main beam. The main beam has a first through hole 101 extending from front to back, through which the transmission belt 212 can pass and connect with the driven pulley 211 and the driving pulley 213.

[0047] Understandably, the clearance at the top of the machine head is usually relatively large compared to the lower middle section. Provided the drive belt width meets the required strength, the driven pulley can be partially located within this clearance. Alternatively, the driven pulley can be positioned above the machine head, offset from it, allowing for a wider drive belt.

[0048] The belt drive assembly is preferably a synchronous belt drive assembly. It is understood that the belt drive assembly 21 may also be provided with a tension pulley 214, where the tension pulley seat is installed on the rear side of the main beam, and the tension pulley is located in the first through hole on the rear side of the main beam.

[0049] Preferably, the width of the drive belt is greater than the gap width between two adjacent machine heads. Because this embodiment avoids the impact of a small head spacing on increasing the width of the drive belt, the drive belt can be set wider, at least greater than the gap width between two adjacent machine heads, thus solving the problem of narrow drive belts easily causing belt breakage.

[0050] For the multi-head embroidery machine involved in this embodiment, only one belt drive assembly 21 and one gear drive assembly 22 are provided. Since the main shaft needs to drive multiple heads simultaneously, the belt drive assembly can pass through the transverse middle area of ​​the main beam, while the gear drive assembly is transversely close to the belt drive assembly, for example, with only one head between them. Thus, the gear drive assembly 22 can drive the main shaft to rotate in the middle of the main shaft. In this way, the number of heads on both sides of the gear drive assembly can be exactly the same or approximately equal, so the force on both sides of the main shaft is more balanced, which helps to reduce vibration and noise.

[0051] Furthermore, a reducer 13 is provided between the main motor 12 and the belt drive assembly 21, wherein the output shaft of the main motor is connected to the input end of the reducer, and the output shaft of the reducer is connected to the belt drive assembly. The reducer reduces speed, increases torque, and provides buffering and overload protection, as well as improving transmission stability. Based on existing technology, it can be understood that the reducer can be implemented using multi-stage gears, planetary gears, worm gears, or other transmission structures. The output shaft of the reducer can directly serve as the pulley shaft of the driving pulley, or it can be set as an independent pulley shaft, with a coupling connecting the output shafts of the pulley shaft reducer.

[0052] Understandably, the multi-head embroidery machine here has at least two heads, and the specific number of heads can be three, four or even more.

[0053] The above description is merely a specific embodiment of the utility model, but the scope of protection of the utility model is not limited thereto. Those skilled in the art should understand that the utility model includes, but is not limited to, the content described in the accompanying drawings and the specific embodiments above. Any modifications that do not depart from the functional and structural principles of the utility model will be included within the scope of the claims.

Claims

1. A main shaft drive structure for a multi-head embroidery machine, comprising at least two machine heads mounted side-by-side laterally on the front side of a main beam, a main shaft passing laterally through the at least two machine heads, a main motor located on the rear side of the main beam, and a main shaft transmission mechanism connecting the main motor and the main shaft, characterized in that, The main shaft transmission mechanism includes a belt drive assembly and a gear drive assembly. The gear drive assembly is located in the gap between two adjacent machine heads and is connected to the main shaft. The belt drive assembly is driven by the main motor and is connected to the gear drive assembly.

2. The multi-head embroidery machine spindle drive structure according to claim 1, characterized in that, The gear transmission assembly includes a driving gear and a driven gear. The driven gear is mounted on the main shaft, and the driving gear is mounted on the auxiliary shaft. The auxiliary shaft is connected to the belt transmission assembly.

3. The multi-head embroidery machine spindle drive structure according to claim 2, characterized in that, The auxiliary shaft is located above the machine head, and the belt drive assembly is offset from the machine head.

4. The multi-head embroidery machine spindle drive structure according to claim 2, characterized in that, The main beam is provided with bearing seats at transverse intervals along its front side, and the auxiliary shaft is rotatably supported on the bearings inside the bearing seats.

5. The multi-head embroidery machine spindle drive structure according to claim 2, characterized in that, Both the driving gear and the driven gear are double helical gears, and the helical teeth between the two helical gears form a V-shaped tooth.

6. The multi-head embroidery machine spindle drive structure according to claim 2, characterized in that, The belt drive assembly includes a driven pulley mounted on the auxiliary shaft, a driving pulley driven by the output shaft of the main motor, and a drive belt connecting the driving pulley and the driven pulley.

7. The multi-head embroidery machine spindle drive structure according to claim 6, characterized in that, The width of the drive belt is greater than the gap width between two adjacent machine heads.

8. The multi-head embroidery machine spindle drive structure according to claim 2, characterized in that, The belt drive assembly passes through the transverse middle region of the beam, and the gear drive assembly is transversely close to the belt drive assembly.

9. The multi-head embroidery machine spindle drive structure according to claim 1, characterized in that, A speed reducer is provided between the main motor and the belt drive assembly, wherein the output shaft of the main motor is connected to the input end of the speed reducer, and the output shaft of the speed reducer is connected to the belt drive assembly.

10. A multi-head embroidery machine, characterized in that, The spindle drive structure includes any one of claims 1 to 9.

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