A dual-axis pitch-changing device with ultra-long pitch-changing function

Abstract

The present invention discloses a dual-axis pitch-changing device with an ultra-long pitch-changing function, which relates to the technical field of pitch-changing equipment. The dual-axis pitch-changing device comprises: a first rotating shaft and a second rotating shaft arranged in parallel, a plurality of screw sections, and a plurality of module units fitted on the screw sections; the plurality of screw sections are staggered and arranged on the first rotating shaft and the second rotating shaft in sequence, and the plurality of module units are connected to the plurality of screw sections in a plurality of module queues, and any one module queue includes at least one connecting module, which is used to connect two adjacent screw sections. By setting up dual rotating shafts arranged in parallel and reserving space for the screw to move on the rotating shafts, and coordinating the staggered arrangement of the plurality of screw sections, the modules drive the screw to move on the rotating shafts during the pitch-changing movement, thereby ensuring the pitch adjustment accuracy of the plurality of modules, and being able to meet the long-distance pitch adjustment of a plurality of workstations, with good pitch adjustment stability.

Description

Technical Field

[0001] The present invention relates to the technical field of pitch-changing equipment, and in particular to a dual-axis pitch-changing device with an ultra-long pitch-changing function. Background Art

[0002] The current linear pitch-changing equipment mainly realizes linear pitch-changing operation by driving multiple workstations through a single-rod pitch-changing screw. Based on the thread design of the pitch-changing screw, by fitting several modules in the thread of the pitch-changing screw and cooperating with the connection structure of the linear slider guide, when the pitch-changing screw rotates, multiple modules can move linearly along the axial direction of the pitch-changing screw, thereby realizing synchronous linear pitch-changing movement of several modules.

[0003] Since the existing linear pitch-changing equipment uses a single screw to meet the pitch-changing requirements, the limitations of the single screw and thread result in a short pitch-changing distance for multiple modules. In addition, the long-distance pitch-changing operation of multiple stations based on a single screw is prone to large accumulated pitch-changing distance deviations, which affects the pitch-changing adjustment stability of the linear pitch-changing equipment. Summary of the Invention

[0004] The purpose of the present invention is to overcome the shortcomings of the prior art. The present invention provides a dual-axis pitch changing device with an ultra-long pitch changing function. By setting up dual rotating shafts arranged in parallel and reserving active space for the movement of the screw on the rotating shaft, and cooperating with multi-segment screws arranged in a staggered manner, the module drives the screw to move on the rotating shaft during the pitch changing movement, ensuring the pitch adjustment accuracy of multiple modules, and being able to meet the long-distance pitch adjustment of multiple workstations, with good pitch adjustment stability.

[0005] The present invention provides a dual-axis pitch-changing device with an ultra-long pitch-changing function, the dual-axis pitch-changing device comprising: a first rotating shaft and a second rotating shaft arranged in parallel, a plurality of screw sections, and a plurality of module units fitted on the screw sections;

[0006] A plurality of screw segments are sequentially staggered and arranged on the first rotating shaft and the second rotating shaft; a plurality of module units are connected to the plurality of screw segments in a plurality of module queues, and any module queue includes at least one connecting module, and the connecting module is used to connect two adjacent screw segments;

[0007] The screw is sleeved on the first rotating shaft, and the first rotating shaft is provided with a movable space for the screw to move, and / or the screw is sleeved on the second rotating shaft, and the second rotating shaft is provided with a movable space for the screw to move.

[0008] Furthermore, the plurality of screw sections include a first sub-screw arranged in the middle of the first rotating shaft, and a plurality of second sub-screws symmetrically distributed on both sides of the first sub-screw;

[0009] A plurality of the second sub-screws are sequentially staggered and arranged on the first rotating shaft and the second rotating shaft.

[0010] Furthermore, any of the screws is provided with a variable pitch thread and a linear annular groove, one end of the connecting module is connected to the variable pitch thread of the screw, and the other end of the connecting module is connected to the linear annular groove of the next adjacent screw.

[0011] Furthermore, any section of the screw includes a bearing seat and a connecting bearing arranged in the bearing seat, and the screw is slidingly connected to the first rotating shaft based on the connecting bearing, or the screw is slidingly connected to the second rotating shaft based on the connecting bearing.

[0012] Furthermore, the dual-axis pitch changing device also includes a first linear guide rail, which is arranged parallel to the top of the first rotating shaft, and a first slider is provided on the bearing seat of the screw located on the first rotating shaft, and the screw located on the first rotating shaft slides with the first linear guide rail based on the first slider.

[0013] Furthermore, the first linear guide rail includes at least one first sub-guide rail and at least one second sub-guide rail, and the first sub-guide rail and the second sub-guide rail are symmetrically distributed.

[0014] Furthermore, the dual-axis pitch changing device also includes a second linear guide rail, which is arranged parallel to the top of the second rotating shaft, and a second slider is provided on the bearing seat of the screw located on the second rotating shaft, and the screw located on the second rotating shaft slides with the second linear guide rail based on the second slider.

[0015] Furthermore, a partition is provided in the middle of the second rotating shaft, and the second linear guide rail includes a third sub-guide rail and a fourth sub-guide rail, and the third sub-guide rail and the fourth sub-guide rail are symmetrically distributed on both sides of the partition.

[0016] Furthermore, the dual-axis pitch-changing device further includes a third linear guide rail and a plurality of third sliders;

[0017] A plurality of module units are slidably fitted on the third linear guide rail based on a plurality of the third sliding blocks.

[0018] The present invention provides a dual-axis pitch-changing device with an ultra-long pitch-changing function, which provides two parallel rotating shafts, and staggers a plurality of screw sections on the rotating shafts. Based on the adjustment of the segmented screws, the module units corresponding to each screw section can be precisely adjusted; based on the linkage connection between adjacent screws, the plurality of screw sections can move linearly with the opening and closing pitch-changing movement of the module units, thereby driving a plurality of module units of each screw section to perform long-distance pitch-changing movement adjustment, so as to meet the ultra-long-distance pitch-changing adjustment of multiple workstations and improve the reliability of the dual-axis pitch-changing device. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 2 is a schematic structural diagram of a dual-axis pitch-changing device with an ultra-long pitch-changing function according to an embodiment of the present invention;

[0020] Figure 2 This is a schematic diagram of the internal structure of a dual-axis pitch-changing device with an ultra-long pitch-changing function according to an embodiment of the present invention;

[0021] Figure 3 In the embodiment of the present invention, Figure 2 An enlarged schematic diagram of the structure at A;

[0022] Figure 4 It is a top view of the structure of a dual-axis pitch-changing device with an ultra-long pitch-changing function in an embodiment of the present invention. DETAILED DESCRIPTION

[0023] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0024] Please refer to Figures 1 to 4, an embodiment of the present invention provides a dual-axis pitch-changing device with an ultra-long pitch-changing function, the dual-axis pitch-changing device comprising: a first rotating shaft 1 and a second rotating shaft 2 arranged in parallel, a plurality of screw sections, and a plurality of module units 10 fitted on the screws; the plurality of screw sections are staggeredly arranged on the first rotating shaft 1 and the second rotating shaft 2 in sequence, the plurality of module units 10 are connected to the plurality of screw sections in a plurality of module queues, and any group of module queues includes at least one connecting module 15, the connecting module 15 is used to connect two adjacent screw sections, when the first rotating shaft 1 and the second rotating shaft 2 are driven to rotate based on a driving component, the plurality of screw sections can rotate with the first rotating shaft 1 and the second rotating shaft 2, and the module queues on the plurality of screw sections can achieve pitch-changing movement with the screws, and the adjacent screws are driven to move based on the connecting module 15, thereby realizing long-distance pitch-changing adjustment of the plurality of module units 10.

[0025] Among them, the parallel arrangement of the first rotating shaft 1 and the second rotating shaft 2 refers to two rotating drive shafts with parallel axes. Specifically, this can be achieved by using a high-rigidity metal shaft with a bearing 13 support structure. Through the coordinated drive of the two shafts, the axial load-bearing capacity of the pitch variable device can be effectively expanded and the risk of single-shaft deformation can be reduced.

[0026] Among them, several sections of screw refer to threaded drive components arranged in sections along the axial direction. Specifically, they can be realized by combining metal rods with variable pitch threads through a connecting structure. The segmented design allows the formation of an ultra-long variable pitch stroke within a limited axial length while avoiding the flexural deformation problem of a single long screw.

[0027] Among them, the staggered arrangement refers to the layout of each section of the screw being arranged alternately on the double axis. Specifically, it can be achieved by installing adjacent screws on different rotating axes respectively, forming complementary drive areas through spatial staggered distribution, thereby improving the distribution density and movement continuity of the module unit 10.

[0028] Among them, the connecting module 15 refers to a transmission component that connects adjacent screws across the axis. By cooperating with the variable pitch threads and linear annular grooves 14 of the two sections of the screws at the same time, it realizes the power transmission function, so that the adjacent screws can move axially based on the drive of the connecting module 15.

[0029] Furthermore, the dual-axis pitch changing device also includes a first driving component 32 and a second driving component 31. The first driving component 32 is driven and connected to the first rotating shaft 1, and the first rotating shaft 1 is rotationally driven based on the first driving component 32. The second driving component 31 is driven and connected to the second rotating shaft 2, and the second rotating shaft 2 is driven to rotate based on the second driving component 31.

[0030] Furthermore, the first driving component 32 and the second driving component 31 can be configured as driving cylinders, and the first driving component 32 and the second driving component 31 can also be configured as driving motors to meet the variable pitch drive control of several module units 10.

[0031] Specifically, the plurality of screw sections include a first sub-screw 16 disposed in the middle of the first rotating shaft 1 , and a plurality of second sub-screws 11 symmetrically distributed on both sides of the first sub-screw 16 ;

[0032] Several second sub-screws 11 are staggeredly arranged on the first rotating shaft 1 and the second rotating shaft 2 in sequence, and the first sub-screw 16 is fixedly set in the middle of the first rotating shaft 1, so that several second sub-screws 11 can be linked in sequence based on the connecting module 15, and based on the rotation drive of the first rotating shaft 1 and the second rotating shaft 2, several second sub-screws 11 are moved together in the direction of the first sub-screw 16, or several second sub-screws 11 are moved in a direction away from the first sub-screw 16, and several module queues move accordingly with the second sub-screw 11, and make variable pitch movements driven by the rotation of the second sub-screw 11, thereby realizing ultra-long distance variable pitch adjustment control of several module units 10.

[0033] The number of the second sub-screws 11 can be an even number, such as two or four, and they are symmetrically distributed along both sides of the first sub-screw 16. The staggered arrangement is manifested as the second sub-screws 11 being alternately arranged on the first rotating shaft 1 and the second rotating shaft 2. For example, the second sub-screw 11 on the first rotating shaft 1 is axially displaced with the adjacent second sub-screw 11 on the second rotating shaft 2.

[0034] Specifically, when the first rotating shaft 1 and the second rotating shaft 2 rotate synchronously, the first sub-screw 16 is centrally positioned to achieve symmetrical driving force distribution, and the second sub-screws 11 on either side produce synchronous displacement based on the symmetrical distribution. The staggered arrangement allows for free space between the first sub-screw 16 and the second sub-screw 11 on the first rotating shaft 1, and also between the multiple second sub-screws 11 on the second rotating shaft 2. Based on the connecting modules 15 between the adjacent staggered screws, the second sub-screws 11 can move within the free space, achieving convergence or divergence operations, thereby achieving axial length adjustment control of the pitch variable device.

[0035] For example, when the second sub-screws 11 on the first rotating shaft 1 drive the module unit 10 to move, the staggered second sub-screws 11 on the second rotating shaft 2 can share the load of the adjacent module unit 10, avoiding uniaxial stress concentration. During pitch change, the symmetrically distributed second sub-screws 11 offset unilateral deviations through synchronous displacement paths, while the staggered arrangement disperses accumulated errors through alternating drive modes.

[0036] Specifically, any of the screws is provided with a variable pitch thread and a linear annular groove 14, one end of the connecting module 15 is connected to the variable pitch thread of the screw, and the other end of the connecting module 15 is connected to the linear annular groove 14 of the adjacent next screw, so that the connecting module 15 can realize synchronous variable pitch adjustment with the variable pitch thread of the screw and other module units 10 of the corresponding module queue, and the connecting module 15 can maintain connection with the other screw based on the linear annular groove 14, thereby driving the other screw to move with the module unit 10 of the current screw.

[0037] The present application achieves a symmetrical distribution of screws in a dual-axis pitch-changing device, improving the synchronization and stability of the pitch-changing process. The first sub-screw 16 serves as a central reference, ensuring the symmetrical arrangement of the second sub-screws 11 on both sides, balancing the driving force and motion trajectory on both sides. The staggered arrangement of the second sub-screws 11 on the two axes forms a complementary layout, dispersing the single-axis load and enhancing the linkage effect between the screws. This structural design effectively reduces the problem of uneven force during the pitch-changing process, reduces the accumulation of deviations, and improves the pitch-changing accuracy and device stability.

[0038] Specifically, the screw is sleeved on the first rotating shaft 1, and the first rotating shaft 1 is provided with a movable space for the screw to move, and / or the screw is sleeved on the second rotating shaft 2, and the second rotating shaft 2 is provided with a movable space for the screw to move.

[0039] Specifically, any section of the screw includes a bearing seat 12 and a connecting bearing 13 arranged in the bearing seat 12, and the screw is slidingly connected to the first rotating shaft 1 based on the connecting bearing 13, and / or the screw is slidingly connected to the second rotating shaft 2 based on the connecting bearing 13, and the connecting bearing 13 can be configured as a sliding bearing 13, and the screw is connected to the first rotating shaft 1 based on the sliding bearing 13.

[0040] Furthermore, a fixing part is provided on the screw, and a guide slot is provided on the first rotating shaft 1. The fixing part is fixed to the screw based on a bolt, and one end of the fixing part is inserted into the guide slot, so that one end of the fixing part is slidingly connected to the guide slot, so that the screw can move along the first rotating shaft 1 based on the sliding cooperation between the fixing part and the guide slot, and when the first rotating shaft 1 rotates, the screw can rotate with the first rotating shaft 1 based on the cooperation structure between the fixing part and the guide slot.

[0041] The screw is connected to the second rotating shaft 2 based on the fixing part, so that the screw can rotate with the second rotating shaft 2. The matching structural relationship between the second rotating shaft 2, the screw and the fixing part can refer to the matching structural relationship and action principle of the above-mentioned first rotating shaft 1 and the screw, and will not be repeated here.

[0042] Furthermore, the screw can cooperate with the second rotating shaft 2 based on the sliding bearing 13, and the cooperation structure between the screw and the second rotating shaft 2 is the same as the cooperation structure between the first rotating shaft 1 and the screw, and the action effects and structural principles achieved are also consistent, which will not be repeated here.

[0043] Specifically, the dual-axis pitch-changing device further includes a first linear guide 5, which is arranged parallel to and above the first rotating shaft 1. A first slider 7 is provided on the bearing seat 12 of the screw located on the first rotating shaft 1. The screw located on the first rotating shaft 1 slides in engagement with the first linear guide 5 based on the first slider 7. The first linear guide 5 includes at least one first sub-guide rail and at least one second sub-guide rail, and the first and second sub-guide rails are symmetrically distributed.

[0044] The first sub-guide rail and the second sub-guide rail can be made of high-strength alloy materials respectively, and the distance between the two can be adjusted to the range of 50-200mm based on the length of the screw. A ball slide structure is set on the surface of each sub-guide rail, and the slide depth is controlled at 2-5mm. When the two sub-guide rails are symmetrically arranged at both ends of the rotating shaft, the sum of the cross-sectional inertia moments of the two sub-guide rails is increased by 1.8-2.5 times that of the original single guide rail. When the screw is subjected to lateral loads, the symmetrically distributed sub-guide rails can bear 40%-60% of the load components respectively, reducing the overall deflection of the guide rail system by 30%-50%.

[0045] Specifically, when the screw moves along the axis of rotation, the two symmetrically distributed sub-guide rails, through their connected sliders, synchronously bear the load of the bearing seat 12. Because the support points of the two sub-guide rails are distributed on both sides of the screw centerline, a force couple balance structure is formed, which can effectively offset the torque generated by the screw deflection.

[0046] The embodiment of the present invention achieves a uniform distribution of force on the guide rail and improves the sliding stability during the movement of the screw. Specifically, the symmetrically distributed sub-guide rail structure balances the lateral force generated when the screw moves, avoiding deformation or increased friction caused by excessive stress on the single-sided guide rail. In addition, the provision of multiple sub-guide rails enhances the overall rigidity of the guide rail system, ensures the synchronization accuracy of the module queue in long-distance pitch movement, and reduces the cumulative error caused by the asymmetry of the guide rail structure. Therefore, the present application improves the pitch adjustment stability and accuracy of the dual-axis pitch-changing device, and with the symmetrically distributed screw structure, it allows several module units 10 to synchronously perform pitch convergence or pitch expansion effects to meet the linear pitch operation of several module units 10.

[0047] Specifically, the dual-axis pitch changing device also includes a second linear guide rail 4, which is arranged parallel to the top of the second rotating shaft 2, and a second slider 6 is provided on the bearing seat 12 of the screw located on the second rotating shaft 2. The screw located on the second rotating shaft 2 slides with the second linear guide rail 4 based on the second slider 6.

[0048] Among them, the arrangement direction of the second linear guide rail 4 is parallel to the axial direction of the second rotating shaft 2, and the length of the guide rail can cover the maximum movement stroke of the screw, for example, the length of the guide rail is 1.2-1.5 times the length of the screw. The second slider 6 is integrated with the bearing seat 12 by bolts or welding, and the contact surface between the slider and the guide rail can be provided with a lubricating coating or rolling elements to reduce the friction coefficient. The cross-sectional shape of the guide rail can be rectangular or T-shaped, for example, a rectangular cross-section guide rail with a width of 20-30 mm. On the basis of the axial sliding of the screw connected to the bearing 13, a double constraint is formed by the cooperation of the second slider 6 and the guide rail, wherein the rigid reference surface of the guide rail limits the radial displacement of the screw, and the sliding surface of the slider bears the lateral load.

[0049] Specifically, when the second rotating shaft 2 drives the screw to move axially, the connecting bearing 13 in the bearing seat 12 allows the screw to slide axially, while the second slider 6 provides linear guidance along the sliding path of the second linear guide 4. The parallel arrangement of the guide rails ensures that the direction of screw movement is consistent with the axis of the rotating shaft, suppressing radial deviation caused by rotating shaft rotation or external vibration.

[0050] Specifically, a partition is provided in the middle of the second rotating shaft 2 , and the second linear guide rail 4 includes a third sub-guide rail and a fourth sub-guide rail, and the third sub-guide rail and the fourth sub-guide rail are symmetrically distributed on both sides of the partition.

[0051] The present application further proposes that a partition is provided in the middle of the second rotating shaft 2, and the second linear guide rail 4 includes a third sub-guide rail and a fourth sub-guide rail, which are symmetrically distributed on both sides of the partition rail.

[0052] Among them, the partition is fixedly set in the middle position in the length direction of the second rotating shaft 2, the symmetry axis of the third sub-guide rail and the fourth sub-guide rail coincides with the center plane of the partition, and the guide rail groove spacing error between the two is controlled within ±0.05mm. The top of the partition extends to the installation plane of the second linear guide rail 4, forming a continuous support surface for the guide rail, and the width of the support surface can be 1.2-1.5 times the width of the guide rail. When the module queue moves on the second rotating shaft 2, the symmetrical layout of the third sub-guide rail and the fourth sub-guide rail causes the lateral force vectors borne by the guide rails on both sides to offset each other. At the same time, the supporting effect of the partition shortens the guide rail span by more than 50%.

[0053] Specifically, the third sub-guide rail and the fourth sub-guide rail are respectively fixed to the support platforms on both sides of the partition by bolts, and the symmetry error of the installation reference surfaces of the two relative to the center plane of the partition does not exceed 0.1mm. When the module queue moves along the second rotation axis 2, the load applied to the third sub-guide rail is transmitted to the side where the fourth sub-guide rail is located through the partition, forming a moment balance. The supporting effect of the partition reduces the maximum deflection value of the guide rail to less than 30% of the structure without partition when it bears the load of the module queue. This structural arrangement effectively suppresses the elastic deformation of the guide rail, so that the position deviation of the module unit 10 along the axial direction of the guide rail is controlled within the range of ±0.15mm during long-stroke movement, which is more than 60% higher than the accuracy of the single guide rail structure.

[0054] Specifically, the dual-axis pitch-changing device further includes a third linear guide rail 8 and a plurality of third sliders 9;

[0055] A plurality of module units 10 are slidably fitted on the third linear guide rail 8 based on a plurality of the third sliding blocks 9 .

[0056] The third linear guide 8 is arranged in parallel between the dual-axis rotation axes or extends in the same direction as the rotation axes, and its length covers the moving stroke of the module unit 10. The number of third sliders 9 corresponds one-to-one to the module units 10, and each module unit 10 forms a rigid sliding connection with the third linear guide 8 through an independent third slider 9. The cross-sectional shape of the third linear guide 8 can be rectangular, trapezoidal or dovetail. For example, a rectangular cross-sectional guide rail is used in conjunction with a ball slider to withstand radial loads. The installation position of the third slider 9 is configured within the projection area of ​​the center of gravity of the module unit 10. Furthermore, the slider spacing is set to 1.2-1.5 times the width of the module unit 10 to balance the guide rigidity and motion resistance. The two ends of the third linear guide 8 are connected to the device frame through a fixed seat, and the parallelism error of the installation plane of the fixed seat is controlled within 0.02mm / m to ensure the straightness of the guide rail.

[0057] Specifically, when the segmented screw is driven by dual-axis rotation, the module unit 10 moves axially under the push of the screw thread. Since the third linear guide 8 and the module unit 10 form a sliding constraint through the third slider 9, the lateral offset of the module unit 10 is limited to the matching clearance between the guide rail and the slider. When the segmented screw is locally deformed due to the misaligned arrangement, the rigid guiding effect of the third linear guide 8 can disperse the lateral force transmitted to the module unit 10, so that the displacement deviation of adjacent module units 10 is limited to the range of a single-segment screw. Furthermore, the ball circulation structure of the third slider 9 can compensate for the slight angular deviation at the connection of the screw segment, for example, allowing deflection compensation of ±1°. As a result, during the long-distance movement of the module queue, the synchronous position error of each module unit 10 is controlled within 0.1% of the total stroke, which is at least 50% higher than the solution that relies solely on screw guidance.

[0058] Specifically, the third linear guide 8 is arranged in parallel on the working plane of the dual-axis pitch change device, and its extension direction is consistent with the axial direction of the first rotating shaft 1 and the second rotating shaft 2. A third slider 9 is fixedly connected to the bottom of each module unit 10. The third slider 9 adopts a rolling body structure and a ball retainer is installed inside. The cross-section of the third linear guide 8 is rectangular, and limiting flanges are provided on both sides. The side walls of the third slider 9 form a clearance fit with the limiting flanges, and the clearance range is controlled between 0.05-0.1 mm. When the module unit 10 moves under the drive of the screw, the third slider 9 slides along the guide surface of the third linear guide 8, and the parallelism error between the installation reference surface of the third linear guide 8 and the axis of the rotating shaft does not exceed 0.02 mm / m.

[0059] Through this technical solution, the module unit 10 achieves dual guidance constraints during variable-pitch movement. The rigid support of the third linear guide rail 8 effectively suppresses lateral vibration caused by the gaps at the screw segment connections. Each module unit 10 is connected to the guide rail via an independent third slider 9, allowing the local deformation of the segmented screw to be dispersed and absorbed by multiple slider nodes. During long-distance movement, the third linear guide rail 8 and the rotating shaft form a composite guidance system. The deviation of the linear motion trajectory of the module unit 10 is controlled within the installation accuracy of the guide rail, and the synchronization error of the module queue is reduced to the level of the guide rail gap, thus solving the problem of cumulative error caused by the segmented screw structure.

[0060] An embodiment of the present invention provides a dual-axis pitch-changing device with an ultra-long pitch-changing function, in which two parallel rotating shafts are arranged, and several sections of screw rods are staggered and sleeved on the rotating shafts. Based on the adjustment of the segmented screw rods, the module unit 10 corresponding to each section of the screw rod can be precisely adjusted; based on the linkage connection between adjacent screw rods, several sections of the screw rod can be moved linearly with the opening and closing pitch-changing movement of the module unit 10, thereby driving several module units 10 of each section of the screw rod to perform long-distance pitch-changing movement adjustment to meet the ultra-long-distance pitch-changing adjustment of multiple workstations and improve the reliability of the dual-axis pitch-changing device.

[0061] In addition, the above is a detailed introduction to a dual-axis pitch-changing device with an ultra-long pitch-changing function provided by an embodiment of the present invention. Specific examples are used herein to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core idea. At the same time, for those skilled in the art, according to the idea of ​​the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A dual-axis pitch-changing device with an ultra-long pitch-changing function, characterized in that: The dual-axis pitch-changing device comprises: a first rotating shaft and a second rotating shaft arranged in parallel, a plurality of screw sections, and a plurality of module units fitted on the screw sections; A plurality of screw segments are sequentially staggered and arranged on the first rotating shaft and the second rotating shaft; a plurality of module units are connected to the plurality of screw segments in a plurality of module queues, and any module queue includes at least one connecting module, and the connecting module is used to connect two adjacent screw segments; The screw is sleeved on the first rotating shaft, and the first rotating shaft is provided with a movable space for the screw to move, and / or the screw is sleeved on the second rotating shaft, and the second rotating shaft is provided with a movable space for the screw to move; The plurality of screw sections include a first sub-screw arranged in the middle of the first rotating shaft, and a plurality of second sub-screws symmetrically distributed on both sides of the first sub-screw; A plurality of the second sub-screws are sequentially staggered and arranged on the first rotating shaft and the second rotating shaft; The first sub-screw is fixedly arranged in the middle of the first rotating shaft, so that several second sub-screws can be linked in sequence based on the connecting module. Based on the rotation drive of the first rotating shaft and the second rotating shaft, several second sub-screws are moved together in the direction of the first sub-screw, or several second sub-screws are moved in a direction away from the first sub-screw, and several module queues move accordingly with the second sub-screw, and move with variable pitch driven by the rotation of the second sub-screw, thereby realizing ultra-long distance variable pitch adjustment control of several module units.

2. The dual-axis pitch-changing device with ultra-long pitch-changing function according to claim 1, characterized in that: Any of the screws is provided with a variable pitch thread and a linear annular groove, one end of the connecting module is connected to the variable pitch thread of the screw, and the other end of the connecting module is connected to the linear annular groove of the next adjacent screw.

3. The dual-axis pitch-changing device with ultra-long pitch-changing function according to claim 1, characterized in that: Any section of the screw includes a bearing seat and a connecting bearing arranged in the bearing seat, and the screw is slidingly connected to the first rotating shaft based on the connecting bearing, or the screw is slidingly connected to the second rotating shaft based on the connecting bearing.

4. The dual-axis pitch-changing device with ultra-long pitch-changing function according to claim 3, characterized in that: The dual-axis pitch changing device also includes a first linear guide rail, which is arranged parallel to the top of the first rotating shaft, and a first slider is provided on the bearing seat of the screw located on the first rotating shaft. The screw located on the first rotating shaft slides with the first linear guide rail based on the first slider.

5. The dual-axis pitch-changing device with ultra-long pitch-changing function according to claim 4, characterized in that: The first linear guide rail includes at least one first sub-guide rail and at least one second sub-guide rail, and the first sub-guide rail and the second sub-guide rail are symmetrically distributed.

6. The dual-axis pitch-changing device with ultra-long pitch-changing function according to claim 3, characterized in that: The dual-axis pitch changing device also includes a second linear guide rail, which is arranged parallel to the top of the second rotating shaft, and a second slider is provided on the bearing seat of the screw located on the second rotating shaft. The screw located on the second rotating shaft slides with the second linear guide rail based on the second slider.

7. The dual-axis pitch-changing device with ultra-long pitch-changing function according to claim 6, characterized in that: A partition is provided in the middle of the second rotating shaft, and the second linear guide rail includes a third sub-guide rail and a fourth sub-guide rail, and the third sub-guide rail and the fourth sub-guide rail are symmetrically distributed on both sides of the partition.

8. The dual-axis pitch-changing device with ultra-long pitch-changing function according to claim 1, characterized in that: The dual-axis pitch-changing device further includes a third linear guide rail and a plurality of third sliders; A plurality of module units are slidably fitted on the third linear guide rail based on a plurality of the third sliding blocks.

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