A cam drive mechanism for 3D lattice weaving

Abstract

The utility model discloses a cam drive mechanism for 3D grid weaving, including main drive part, reversing subassembly, cam subassembly and rocker arm subassembly, the main drive part is through reversing subassembly drive cam subassembly rotation, and each rocker arm on rocker arm subassembly is driven by cam subassembly and makes periodic motion, the cam subassembly includes camshaft, reduction gear and multicycle conjugate cam group, the reduction gear is installed one end of camshaft, and is engaged with the output of reversing subassembly, multicycle conjugate cam group fixed mounting on camshaft is driven by camshaft and makes multicycle conjugate cam group rotate, rocker arm subassembly includes rocker arm axle and multicycle rocker arm group, each rocker arm in multicycle rocker arm group is rotatably installed on rocker arm axle, and with multicycle conjugate cam group one one correspondence cooperation. The utility model discloses a plurality of cyclic conjugate cam integrated settings to solve the problem that the existing open box can not efficiently, high quality 3D grid cloth production.

Description

Technical Field

[0001] This utility model belongs to the field of loom technology, and specifically relates to a cam drive mechanism for 3D mesh weaving. Background Technology

[0002] Due to its porous and lightweight properties, mesh fabrics are widely used in industry, agriculture, construction, and composite materials. Their production relies on specialized textile machinery, with the cam mechanism controlling the warp yarn shedding motion being a core component. However, existing commercially available mechanical or electronic shedding boxes have the following key technical shortcomings when used to produce high-performance 3D mesh fabrics: 1. Insufficient Functional Integration: 3D mesh weaving, especially single-sided mesh structures, requires complex and precise periodic movements between multiple actuators, such as binding yarns, lateral needles, connecting yarns at six different positions, and upper and lower warp yarns. Traditional cam mechanisms are usually designed only for the single warp yarn shedding movement and lack dedicated cam configurations to drive binding yarns, lateral needles, and other components, resulting in the inability to form a complete 3D weaving structure.

[0003] 2. Inability to achieve the required coordination of motion in 3D fabrics: Even with multiple independent mechanisms driving each actuator separately, it is difficult to guarantee their precise coordination in terms of time (phase) and space. The coordination errors between the motion units directly affect the stability and uniformity of the mesh structure, making it impossible to weave the fabric.

[0004] Therefore, the existing open cam drive mechanism is difficult to meet the weaving requirements of high-performance 3D mesh fabric, and there is an urgent need for a new drive solution that can integrate multiple motion controls and ensure precise coordination of each motion unit. Utility Model Content

[0005] To address the aforementioned issues, this invention provides a cam drive mechanism for 3D mesh weaving, which integrates multiple cyclic conjugate cams to solve the problem that existing open boxes cannot efficiently and effectively produce 3D mesh fabric.

[0006] The main technical solution adopted in this utility model is as follows: A cam drive mechanism for 3D mesh weaving includes a main drive, a reversing assembly, a cam assembly, and a rocker arm assembly; The main drive unit drives the cam assembly to rotate through the reversing component, and the cam assembly drives each rocker arm on the rocker arm assembly to make periodic movements. The cam assembly includes a camshaft, a reduction gear, and a multi-cycle conjugate cam group. The reduction gear is installed at one end of the camshaft and meshes with the output end of the reversing assembly. The multi-cycle conjugate cam group is fixedly installed on the camshaft and is driven to rotate by the camshaft. The rocker arm assembly includes a rocker arm shaft and a multi-cycle rocker arm group. Each rocker arm in the multi-cycle rocker arm group is rotatably mounted on the rocker arm shaft and corresponds to and cooperates with the multi-cycle conjugate cam group.

[0007] Preferably, the multi-cycle conjugate cam group includes several coaxially arranged multi-cycle conjugate cams; the multi-cycle rocker arm group includes several rocker arms that correspond to and cooperate with the multi-cycle conjugate cams, and the two rollers of the rocker arms respectively contact the contour surface of the corresponding multi-cycle conjugate cam.

[0008] Preferably, the main cam plates of the coaxially arranged multi-cycle conjugate cams are machined with the same number of circulation segments, and the circulation segments on each multi-cycle conjugate cam correspond to each other in the circumferential direction, and the circulation segments on the same multi-cycle conjugate cam are evenly distributed in the circumferential direction.

[0009] Preferably, if the number of cycle segments on the multi-cycle conjugate cam is n, then the transmission ratio between the main drive and the cam assembly is 1:n.

[0010] Preferably, the multi-cycle conjugate cam group includes a binding yarn conjugate cam, a transverse needle conjugate cam, a face yarn opening conjugate cam group, and a connecting yarn opening conjugate cam, all mounted coaxially. The multi-cycle rocker arm group includes a binding yarn rocker arm, a transverse needle rocker arm, a face yarn rocker arm group, and a connecting yarn rocker arm, all mounted coaxially, and are respectively configured to correspond one-to-one with the binding yarn conjugate cam, transverse needle conjugate cam, face yarn opening conjugate cam group, and connecting yarn opening conjugate cam in the multi-cycle conjugate cam group.

[0011] Preferably, when weaving a 3D single-sided mesh, the yarn opening conjugate cam group includes an upper yarn opening conjugate cam and a lower yarn opening conjugate cam. The upper yarn opening conjugate cam is used to cooperate with the upper weft yarn to weave the upper mesh, and the lower yarn opening conjugate cam is used to cooperate with the lower weft yarn to weave the base fabric. The yarn rocker arm group includes two yarn rocker arms that correspond one-to-one with the upper yarn opening conjugate cam and the lower yarn opening conjugate cam, respectively.

[0012] Preferably, when weaving a 3D double-sided mesh, the yarn opening conjugate cam group includes an upper yarn opening conjugate cam and a lower yarn opening conjugate cam. The upper yarn opening conjugate cam is used to cooperate with the upper weft yarn to weave the upper mesh, and the lower yarn opening conjugate cam is used to cooperate with the lower weft yarn to weave the lower mesh. The contour lines on the upper and lower yarn opening conjugate cams are centrally symmetrical. The yarn rocker arm group includes two yarn rocker arms that correspond one-to-one with the upper and lower yarn opening conjugate cams, respectively.

[0013] Beneficial effects: This utility model provides a cam drive mechanism for 3D mesh weaving, which has the following advantages: (1) This utility model integrates multiple conjugate cams that drive the binding yarn, the transverse needle, the face yarn and the connecting yarn in a coaxial manner to form a multi-cycle conjugate cam group. It realizes the unified drive of all key actuators on a single camshaft, solves the problem of the lack of function of traditional mechanisms, and can complete complex 3D mesh weaving cycles.

[0014] (2) The cyclic segments on each conjugate cam of this invention are strictly aligned in the circumferential phase, ensuring that the movement of the binding yarn, the transverse needle, the face yarn and the connecting yarn are precisely synchronized in time. This integrated design fundamentally avoids the cumulative error that may be caused by multiple independent drive sources, ensuring the uniformity and stability of the fabric structure. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of Embodiment 1; Figure 2 This is a top sectional view of the overall structure of Embodiment 1 (the rocker arm assembly is not shown). Figure 3 This is a side view of the overall structure of Embodiment 1; Figure 4 This is a schematic diagram of the binding yarn cam structure in Embodiment 1; Figure 5 This is a schematic diagram of the transverse needle conjugate cam structure in Embodiment 1; Figure 6 This is a schematic diagram of the upper yarn opening conjugate cam structure in Embodiment 1; Figure 7 This is a schematic diagram of the connecting yarn opening conjugate cam structure in Embodiment 1. In the middle: main drive component 1, main input shaft 11, driving bevel gear 12, reversing assembly 2, intermediate gear shaft 21, reversing bevel gear 22, transmission gear 23, cam assembly 3, camshaft 31, reduction gear 32, multi-cycle conjugate cam group 33, binding yarn conjugate cam 331, transverse needle conjugate cam 332, upper layer yarn opening conjugate cam 333, connecting yarn opening conjugate cam 334, rocker arm assembly 4, binding yarn rocker arm 421, transverse needle rocker arm 422, upper layer yarn rocker arm 423, connecting yarn rocker arm 424. Detailed Implementation

[0016] To enable those skilled in the art to better understand the technical solutions in this application, the technical solutions in the embodiments of this application are clearly and completely described below. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of this application. Example 1

[0017] like Figure 1-3 As shown, this embodiment provides a cam drive mechanism for 3D single-sided mesh weaving, including a main drive component 1, a reversing component 2, a cam component 3, and a rocker arm component 4.

[0018] The main drive unit 1 drives the cam assembly 3 to rotate through the reversing assembly 2, and the cam assembly 3 drives each rocker arm on the rocker arm assembly 4 to make periodic movements. The cam assembly 3 includes a camshaft 31, a reduction gear 32, and a multi-cycle conjugate cam group 33. The reduction gear 32 is installed at one end of the camshaft 31 and meshes with the transmission gear 23. The multi-cycle conjugate cam group 33 is fixedly installed on the camshaft 31 and rotates synchronously with the camshaft 31.

[0019] The rocker arm assembly 4 includes a rocker arm shaft 41 and a multi-cycle rocker arm group 42. Each rocker arm in the multi-cycle rocker arm group 42 is rotatably mounted on the rocker arm shaft 41. The multi-cycle rocker arm group 42 is installed in a one-to-one correspondence with the multi-cycle conjugate cam group 33.

[0020] In this embodiment 1, the main drive component 1 can be, but is not limited to, the following structures: such as... Figure 2-3 As shown, the main drive unit 1 includes a main input shaft 11, and a drive bevel gear 12 is mounted on one end of the main input shaft 11. The axis of the main input shaft 11 is perpendicular to the axis of the camshaft 31.

[0021] In this embodiment 1, the commutation component 2 can be, but is not limited to, the following structures: such as... Figure 2-3 As shown, the reversing assembly 2 includes an intermediate gear shaft 21, a reversing bevel gear 22, and a transmission gear 23. The reversing bevel gear 22 and the transmission gear 23 are coaxially mounted on the intermediate gear shaft 21. The intermediate gear shaft 21 is rotatably mounted on the machine base, and the axis of the intermediate gear shaft 21 is parallel to the axis of the cam shaft 31. The driving bevel gear 12 of the main drive component 1 meshes with the reversing bevel gear 22, and the transmission gear 23 meshes with the input end of the reduction gear 32.

[0022] To achieve 3D single-sided mesh weaving, in this embodiment, the multi-cycle conjugate cam assembly 33 includes a binding yarn conjugate cam 331, a transverse needle conjugate cam 332, an upper layer yarn opening conjugate cam 333, a lower layer yarn opening conjugate cam, and a connecting yarn opening conjugate cam 334, all coaxially arranged. The multi-cycle rocker arm assembly 42 includes a binding yarn rocker arm 421, a transverse needle rocker arm 422, an upper layer yarn rocker arm 423, a lower layer yarn rocker arm, and a connecting yarn rocker arm 424, which respectively correspond to and cooperate with the binding yarn conjugate cam 331, the transverse needle conjugate cam 332, the upper layer yarn opening conjugate cam 333, the lower layer yarn opening conjugate cam, and the connecting yarn opening conjugate cam 334. The two rollers of each rocker arm respectively contact the contour surface of the corresponding multi-cycle conjugate cam.

[0023] In this embodiment 1, several coaxially arranged multi-cycle conjugate cams each have the same number of cycle segments machined on their main cam plates, and the cycle segments on each cam are aligned with each other in the circumferential direction. For a single multi-cycle conjugate cam, its cycle segments are evenly distributed circumferentially. Let the number of cycle segments on the multi-cycle conjugate cam be n, then each cycle segment corresponds to one independent motion cycle completed by the cam rotating 1 / n revolutions. To ensure that the cam assembly completes exactly one motion cycle for each revolution of the main drive component, the transmission ratio between the main drive component and the cam assembly is set to 1:n (transmission ratio i = driven component speed / driving component speed). That is, for every revolution of the main drive component, the cam assembly rotates 1 / n revolutions. In this embodiment 1, n is preferably 12. Thus, a complete revolution of the cam assembly will sequentially complete 12 motion cycles (cycle segments), thereby achieving a complete weaving of a single-layer mesh. The angle of each cycle segment on the multi-cycle conjugate cam is 30°, and the sum of the angles of all cycle segments on the contour line is 360°.

[0024] In Example 1, the binding yarn conjugate cam 331 drives the binding yarn to move periodically up and down via the binding yarn rocker arm 421; as Figure 4 As shown, the profile of the cam is designed according to the actual movement requirements of the binding yarn, and there are 12 circulation segments from a to l evenly distributed in the circumferential direction; The transverse needle conjugate cam 332 drives the transverse needle connected to the binding yarn to perform a periodic transverse cross motion via the transverse needle rocker arm 422; such as Figure 5 As shown, the profile of the cam is designed according to the actual movement requirements of the transverse needle, and there are 12 circulation segments from a to l evenly distributed in the circumferential direction.

[0025] The upper layer yarn opening conjugate cam 333 drives the upper layer yarn and the upper weft yarn to cooperate in weaving the upper layer mesh through the upper layer yarn rocker arm 423; such as Figure 6 As shown, the profile of the cam is designed according to the actual movement requirements of the upper layer of yarn, and there are 12 circulation segments from a to l evenly distributed in the circumferential direction.

[0026] The lower layer yarn opening conjugate cam drives the lower layer yarn and the lower weft yarn to weave the base fabric through the lower layer yarn rocker arm. The profile of the cam is designed according to the actual movement requirements of the lower layer yarn, and there are 12 circulation segments (a to l) evenly distributed in the circumferential direction (not shown).

[0027] The connecting yarn opening conjugate cam 334, via the connecting yarn rocker arm 424, drives the connecting yarn to circulate up (upper 1), middle (middle 1), and lower (lower 1) between the upper mesh and the base fabric, thereby connecting the upper mesh and the base fabric and ensuring the connecting yarn opening is in an optimal state. For example... Figure 7 As shown, the profile of the cam is designed according to the actual movement requirements of the connecting yarn, and there are 12 circulation segments from a to l evenly distributed in the circumferential direction.

[0028] The 12 cycle segments a to l on each of the aforementioned multi-cycle conjugate cams maintain timing synchronization. Through this phase alignment, the actions of the binding yarn, the horizontal needle, the face yarn, and the connecting yarn are integrated in an orderly manner to achieve a complete single-sided mesh knitting cycle.

[0029] In this embodiment 1, the binding process of the binding yarn is as follows: the upper warp yarn forms weft opening I by alternating up and down movement, which is used to pass through the weft yarn. The two binding yarns move laterally above the upper warp yarn and cross each other, then descend simultaneously, forming weft opening II with the upper warp yarn of the same reed eye. The weft yarn passes through the alternating weft openings I and II of the upper warp yarn. After weft insertion, the upper warp yarn moves up and down alternately, and the two binding yarns rise simultaneously above the upper warp yarn. The two binding yarns move laterally in the opposite direction to the previous lateral movement above the upper warp yarn, achieving a new crossover and binding the warp and weft yarns. Based on the periodic coordinated movement path of the binding yarn in this embodiment 1, the specific outer contours of the binding yarn conjugate cam and the transverse needle conjugate cam 332 in this embodiment can be designed. Other multi-cycle cams can also be designed with specific contours according to the periodic coordinated movement path of the corresponding yarn. Example 2

[0030] This embodiment provides a cam drive mechanism for 3D double-sided mesh weaving. Compared to Embodiment 1, the difference lies in that the function of the lower yarn opening conjugate cam is adjusted to cooperate with the lower weft yarn in weaving the lower mesh (rather than the base fabric), and the contour lines on the upper and lower yarn opening conjugate cams are centrally symmetrical. This design makes the opening motion sequence of the upper and lower yarns complementary, thereby enabling the synchronous weaving of two symmetrical mesh layers. Apart from this, the other components and their connections in this embodiment are the same as in Embodiment 1. The outer contour lines of all cams in the multi-cycle conjugate cam group 33 are designed and processed according to the periodic motion law required for driving the yarns.

[0031] The above are merely preferred embodiments of this utility model. It should be noted that, for those skilled in the art, several improvements and modifications can be made without departing from the principle of this utility model, and these improvements and modifications should also be considered within the scope of protection of this utility model.

Claims

1. A cam drive mechanism for 3D mesh weaving, characterized in that, Includes main drive unit, commutation assembly, cam assembly and rocker arm assembly; The main drive unit drives the cam assembly to rotate via a reversing component, which in turn drives the rocker arms on the rocker arm assembly to perform periodic movements; multi-cycle conjugate cam group The cam assembly includes a camshaft, a reduction gear, and a multi-cycle conjugate cam group. The reduction gear is installed at one end of the camshaft and meshes with the output end of the reversing assembly. The multi-cycle conjugate cam group is fixedly installed on the camshaft and is driven to rotate by the camshaft. The rocker arm assembly includes a rocker arm shaft and a multi-cycle rocker arm group. Each rocker arm in the multi-cycle rocker arm group is rotatably mounted on the rocker arm shaft and corresponds to and cooperates with the multi-cycle conjugate cam group.

2. The cam drive mechanism for 3D mesh weaving according to claim 1, characterized in that, The multi-cycle conjugate cam assembly includes several coaxially arranged multi-cycle conjugate cams; the multi-cycle rocker arm assembly includes several rocker arms that correspond to and cooperate with the multi-cycle conjugate cams, and the two rollers of the rocker arms respectively contact the contour surface of the corresponding multi-cycle conjugate cam.

3. The cam drive mechanism for 3D mesh weaving according to claim 2, characterized in that, The main cam plates of several coaxially arranged multi-cycle conjugate cams are machined with the same number of circulation segments, and the circulation segments on each multi-cycle conjugate cam correspond to each other in the circumferential direction, and the circulation segments on the same multi-cycle conjugate cam are evenly distributed in the circumferential direction.

4. The cam drive mechanism for 3D mesh weaving according to claim 3, characterized in that, If the number of cyclic segments on the multi-cycle conjugate cam is n, then the transmission ratio between the main drive and the cam assembly is 1:n.

5. The cam drive mechanism for 3D mesh weaving according to claim 2, characterized in that, The multi-cycle conjugate cam group includes a binding yarn conjugate cam, a transverse needle conjugate cam, a face yarn opening conjugate cam group, and a connecting yarn opening conjugate cam, all mounted coaxially. The multi-cycle rocker arm group includes a binding yarn rocker arm, a transverse needle rocker arm, a face yarn rocker arm group, and a connecting yarn rocker arm, all mounted coaxially, and each corresponds to one of the binding yarn conjugate cam, transverse needle conjugate cam, face yarn opening conjugate cam group, and connecting yarn opening conjugate cam in the multi-cycle conjugate cam group.

6. The cam drive mechanism for 3D mesh weaving according to claim 5, characterized in that, When weaving a 3D single-sided mesh, the yarn opening conjugate cam group includes an upper yarn opening conjugate cam and a lower yarn opening conjugate cam. The upper yarn opening conjugate cam is used to cooperate with the upper weft yarn to weave the upper mesh, and the lower yarn opening conjugate cam is used to cooperate with the lower weft yarn to weave the base fabric. The yarn rocker arm group includes two yarn rocker arms that correspond one-to-one with the upper yarn opening conjugate cam and the lower yarn opening conjugate cam, respectively.

7. The cam drive mechanism for 3D mesh weaving according to claim 5, characterized in that, When weaving a 3D double-sided mesh, the yarn opening conjugate cam group includes an upper yarn opening conjugate cam and a lower yarn opening conjugate cam. The upper yarn opening conjugate cam is used to cooperate with the upper weft yarn to weave the upper mesh, and the lower yarn opening conjugate cam is used to cooperate with the lower weft yarn to weave the lower mesh. The contour lines on the upper and lower yarn opening conjugate cams are centrally symmetrical. The yarn rocker arm group includes two yarn rocker arms that correspond one-to-one with the upper and lower yarn opening conjugate cams, respectively.

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