Double-shaft pitch changing device with ultra-long pitch changing function

Abstract

The invention discloses a double-shaft variable-pitch device with an ultra-long variable-pitch function, and relates to the technical field of variable-pitch equipment, the double-shaft variable-pitch device comprises a first rotating shaft and a second rotating shaft which are arranged in parallel, a plurality of sections of screws and a plurality of module units matched on the screws; the plurality of sections of screw rods are sequentially arranged on the first rotating shaft and the second rotating shaft in a staggered manner, the plurality of module units are divided into a plurality of groups of module queues to be connected to the plurality of sections of screw rods, any group of module queues comprises at least one connecting module, and the connecting module is used for connecting two adjacent sections of screw rods. By arranging the double rotating shafts which are arranged in parallel, reserving the moving space for moving the screw rods on the rotating shafts and matching with the multiple sections of screw rods which are arranged in a staggered mode, the modules drive the screw rods to move on the rotating shafts in the variable-pitch moving process, the variable-pitch adjusting precision of the multiple modules is ensured, long-distance variable-pitch adjusting of multiple stations can be met, and the working efficiency is improved. And good variable-pitch adjusting stability is achieved.

Description

Technical Field

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

[0002] Currently, the existing linear variable pitch devices mainly drive multiple workstations through a single-rod variable pitch screw to achieve linear variable pitch operations. Based on the thread design of the variable pitch screw, by fitting several modules into the threads of the variable pitch screw and combining with the connection structure of the linear slider guide, when the variable pitch screw rotates, multiple modules can perform linear variable pitch movements along the axial direction of the variable pitch screw, realizing the synchronous linear variable pitch movement of several modules.

[0003] Since the existing linear variable pitch devices use a single screw to meet the variable pitch requirements, due to the limitations of a single screw and thread, the variable pitch distances of multiple modules are relatively short, and it is easy to accumulate large variable pitch distance deviations when performing long-distance variable pitch operations for multiple workstations based on a single screw, affecting the variable pitch adjustment stability of the linear variable pitch device. Summary of the Invention

[0004] The purpose of the present invention is to overcome the deficiencies of the prior art. The present invention provides a dual-axis variable pitch device with an ultra-long variable pitch function. By arranging two parallel rotating shafts and reserving a moving space for the screw on the rotating shaft, and cooperating with multiple sections of screws arranged in a staggered manner, when the module moves in a variable pitch manner, it drives the screw to move on the rotating shaft, ensuring the variable pitch adjustment accuracy of multiple modules and being able to meet the long-distance variable pitch adjustment of multiple workstations, with good variable pitch adjustment stability.

[0005] The present invention provides a dual-axis variable pitch device with an ultra-long variable pitch function. The dual-axis variable pitch device includes: a first rotating shaft and a second rotating shaft arranged in parallel, several sections of screws, and several module units fitted on the screws; Several sections of screws are arranged in a staggered manner on the first rotating shaft and the second rotating shaft in sequence. Several module units are connected to several sections of screws in several groups of module queues, and at least one connecting module is included in any group of module queues, and the connecting module is used to connect two adjacent sections of screws; The screw is sleeved on the first rotating shaft, and the first rotating shaft is provided with a moving 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 moving space for the screw to move.

[0006] Further, the several sections of screws include a first sub-screw arranged in the middle of the first rotating shaft, and several second sub-screws symmetrically distributed on both sides of the first sub-screw; Several of the second sub-screws are arranged in a staggered manner on the first rotating shaft and the second rotating shaft in sequence.

[0007] Further, any one of the screws is provided with variable pitch threads and linear circular grooves. One end of the connection module is connected to the variable pitch threads of the screw, and the other end of the connection module is connected to the linear circular groove of the adjacent next screw.

[0008] Further, any section of the screw includes a bearing seat and a connecting bearing arranged in the bearing seat. The screw is slidably connected to the first rotating shaft based on the connecting bearing, or the screw is slidably connected to the second rotating shaft based on the connecting bearing.

[0009] Further, the dual-axis variable pitch device further includes a first linear guide rail. The first linear guide rail is arranged in parallel above the first rotating shaft, and a first slider is arranged on the bearing seat of the screw on the first rotating shaft. The screw on the first rotating shaft is slidably matched with the first linear guide rail based on the first slider.

[0010] Further, 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.

[0011] Further, the dual-axis variable pitch device further includes a second linear guide rail. The second linear guide rail is arranged in parallel above the second rotating shaft, and a second slider is arranged on the bearing seat of the screw on the second rotating shaft. The screw on the second rotating shaft is slidably matched with the second linear guide rail based on the second slider.

[0012] Further, a partition is arranged in the middle of the second rotating shaft. 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.

[0013] Further, the dual-axis variable pitch device further includes a third linear guide rail and a plurality of third sliders; A plurality of module units are slidably matched on the third linear guide rail based on the plurality of third sliders.

[0014] The present invention provides a dual-axis variable pitch device with an ultra-long variable pitch function. Two parallel rotating shafts are provided, and several sections of screws are sleeved on the rotating shafts in a staggered manner. Based on the adjustment of the segmented screws, the module units correspondingly connected to each section of the screw can be accurately adjusted; based on the linkage connection between adjacent screws, several sections of screws can move linearly with the opening and closing of the module units to achieve variable pitch movement, so as to drive several module units of each section of the screw to perform long-distance variable pitch movement adjustment to meet the ultra-long distance variable pitch adjustment of multiple workstations and improve the use reliability of the dual-axis variable pitch device. Description of the Drawings

[0015] Figure 1 is a schematic structural view of a dual-axis variable pitch device with an ultra-long variable pitch function in an embodiment of the present invention; Figure 2 is a schematic internal structure view of a dual-axis variable pitch device with an ultra-long variable pitch function in an embodiment of the present invention; Figure 3 is an enlarged schematic view of the structure at Figure 2 point A attached in an embodiment of the present invention; Figure 4 is a top view of the structure of a dual-axis variable pitch device with an ultra-long variable pitch function in an embodiment of the present invention. Detailed implementation manners

[0016] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present invention.

[0017] Please refer to Figures 1 to 4 , an embodiment of the present invention provides a dual-axis variable pitch device with an ultra-long variable pitch function. The dual-axis variable pitch device includes: a first rotating shaft 1 and a second rotating shaft 2 arranged in parallel, several sections of screws, and several module units 10 fitted on the screws; several sections of screws are arranged in a staggered manner on the first rotating shaft 1 and the second rotating shaft 2 in sequence, and several module units 10 are connected to several sections of screws in several groups of module queues, and at least one connecting module 15 is included in any group of module queues. The connecting module 15 is used to connect two adjacent sections of screws. When the first rotating shaft 1 and the second rotating shaft 2 are driven to rotate based on a driving component, several sections of screws can rotate along with the first rotating shaft 1 and the second rotating shaft 2, and the module queues on several sections of screws can move with variable pitch along with the screws, and the adjacent screws drive the screws to move based on the connecting module 15, so as to realize the long-distance variable pitch adjustment of several module units 10.

[0018] Among them, the first rotating shaft 1 and the second rotating shaft 2 arranged in parallel refer to two rotating drive shafts with parallel axes, and specifically can be realized by using a high-rigidity metal shaft with a bearing 13 support structure. Through the co-driving of the two shafts, the axial load-bearing capacity of the variable pitch device can be effectively expanded, and the risk of single-axis deformation can be reduced.

[0019] Among them, several sections of screws refer to threaded drive components arranged in sections along the axis, and specifically can be realized by combining metal rods with variable pitch threads through a connecting structure. The sectional design allows for the formation of an ultra-long variable pitch stroke within a limited shaft length, while avoiding the problem of flexural deformation of a single long screw.

[0020] Among them, the staggered arrangement refers to the layout mode in which each section of the screw rod is alternately arranged on the double shafts. Specifically, it can be realized by the way that adjacent screw rods are respectively installed on different rotating shafts. Through the spatial staggered distribution, a complementary driving area is formed to improve the distribution density and motion continuity of the module unit 10.

[0021] Among them, the connecting module 15 refers to the transmission component that connects adjacent screw rods across the shafts. By cooperating with the variable pitch thread and the linear circular groove 14 of two sections of screw rods at the same time, the power transmission function is realized, so that the adjacent screw rods can move axially under the drive of the connecting module 15.

[0022] Furthermore, the double-shaft variable pitch device further includes a first driving component 32 and a second driving component 31. The first driving component 32 is drivingly connected to the first rotating shaft 1, and the rotation drive of the first rotating shaft 1 is realized based on the first driving component 32. The second driving component 31 is drivingly connected to the second rotating shaft 2, and the second rotating shaft 2 is driven to perform rotational work based on the second driving component 31.

[0023] 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.

[0024] Specifically, the several sections of screw rods include a first sub-screw rod 16 arranged in the middle of the first rotating shaft 1 and several second sub-screw rods 11 symmetrically distributed on both sides of the first sub-screw rod 16; Several second sub-screw rods 11 are arranged in a staggered manner on the first rotating shaft 1 and the second rotating shaft 2 in sequence. The first sub-screw rod 16 is fixedly arranged in the middle of the first rotating shaft 1, so that several second sub-screw rods 11 can be linked in sequence based on the connecting module 15. Based on the rotational drive of the first rotating shaft 1 and the second rotating shaft 2, several second sub-screw rods 11 move towards the direction of the first sub-screw rod 16, or several second sub-screw rods 11 move away from the direction of the first sub-screw rod 16. And several module queues move correspondingly along with the second sub-screw rods 11 and perform variable pitch movement under the rotation drive of the second sub-screw rods 11, realizing the ultra-long distance variable pitch adjustment control of several module units 10.

[0025] The number of the second sub-screw rods 11 can be an even number, such as two or four, and is symmetrically distributed on both sides of the first sub-screw rod 16. The staggered arrangement is manifested as the second sub-screw rods 11 being alternately arranged on the first rotating shaft 1 and the second rotating shaft 2. For example, the second sub-screw rod 11 on the first rotating shaft 1 forms an axial offset with the adjacent second sub-screw rod 11 on the second rotating shaft 2.

[0026] Specifically, when the first rotating shaft 1 and the second rotating shaft 2 rotate synchronously, the first sub-screw 16 forms a symmetric driving force distribution through central positioning, and the second sub-screws 11 on both sides generate synchronous displacement based on symmetric distribution. The staggered arrangement leaves a moving space between the first sub-screw 16 and the second sub-screws 11 of the first rotating shaft 1, and also leaves a moving space between several second sub-screws 11 on the second rotating shaft 2. Based on the connection module 15 between adjacent staggered screws, the second sub-screw 11 can move within the moving space to achieve the operations of gathering or spreading, so as to realize the length adjustment control of the variable pitch device in the axial direction.

[0027] For example, when the second sub-screw 11 on the first rotating shaft 1 drives the module unit 10 to move, the second sub-screws 11 arranged in a staggered manner on the second rotating shaft 2 can share the load of the adjacent module unit 10, avoiding single-axis stress concentration. During the variable pitch process, the symmetrically distributed second sub-screws 11 offset the unilateral deviation through the synchronous displacement path, and the staggered arrangement disperses the cumulative error through the alternating driving mode.

[0028] Specifically, any one of the screws is provided with a variable pitch thread and a straight circular ring groove 14. One end of the connection module 15 is connected to the variable pitch thread of the screw, and the other end of the connection module 15 is connected to the straight circular ring groove 14 of the next adjacent screw, so that the connection module 15 can realize synchronous variable pitch adjustment with other module units 10 of the corresponding module queue along with the variable pitch thread of the screw, and the connection module 15 can maintain the connection with another screw based on the straight circular ring groove 14, thereby driving another screw to move along with the module unit 10 of the current screw.

[0029] This application realizes the symmetric distribution of the screws in the double-axis variable pitch device, improving the synchronism and stability of the variable pitch process. The first sub-screw 16 serves as the central reference, ensuring the symmetric arrangement of the second sub-screws 11 on both sides, and balancing the driving force and movement trajectory on both sides. The staggered arrangement of the second sub-screws 11 on the two shafts 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 variable pitch process, reduces the accumulation of deviation, and improves the variable pitch accuracy and device stability.

[0030] Specifically, the screw is sleeved on the first rotating shaft 1, and the first rotating shaft 1 is provided with a moving 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 moving space for the screw to move.

[0031] Specifically, any section of the screw rod includes a bearing seat 12 and a connecting bearing 13 disposed within the bearing seat 12. The screw rod is slidably connected to the first rotating shaft 1 based on the connecting bearing 13, and / or the screw rod is slidably connected to the second rotating shaft 2 based on the connecting bearing 13. The connecting bearing 13 can be configured as a sliding bearing 13, and the screw rod is connected to the first rotating shaft 1 based on the sliding bearing 13.

[0032] Further, a fixing member is provided on the screw rod, and a guiding chute is provided on the first rotating shaft 1. The fixing member is fixed to the screw rod by a bolt, and one end of the fixing member is inserted and fitted within the guiding chute, such that one end of the fixing member is slidably connected to the guiding chute. As such, the screw rod can move along the first rotating shaft 1 based on the sliding fit between the fixing member and the guiding chute. When the first rotating shaft 1 rotates, the screw rod can rotate with the first rotating shaft 1 based on the fitting structure between the fixing member and the guiding chute.

[0033] The screw rod is connected to the second rotating shaft 2 based on the fixing member, such that the screw rod can rotate with the second rotating shaft 2. The fitting structural relationship between the second rotating shaft 2, the screw rod, and the fixing member can refer to the fitting structural relationship and operating principle between the first rotating shaft 1 and the screw rod described above, and will not be elaborated herein one by one.

[0034] Further, the screw rod can be fitted with the second rotating shaft 2 based on the sliding bearing 13, and the fitting structure between the screw rod and the second rotating shaft 2 is the same as the fitting structure between the first rotating shaft 1 and the screw rod. The achieved operating effects and structural principles are also the same, and will not be elaborated herein one by one.

[0035] Specifically, the dual-axis variable pitch device further includes a first linear guide rail 5. The first linear guide rail 5 is disposed parallel above the first rotating shaft 1, and a first slider 7 is provided on the bearing seat 12 of the screw rod on the first rotating shaft 1. The screw rod on the first rotating shaft 1 is slidably fitted with the first linear guide rail 5 based on the first slider 7. The first linear guide rail 5 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.

[0036] The first sub-guide rail and the second sub-guide rail can be made of high-strength alloy materials respectively, and the distance between them can be adjusted to the range of 50 - 200 mm based on the length of the screw. A ball slideway structure is arranged on the surface of each sub-guide rail, and the depth of the slideway is controlled within 2 - 5 mm. When two sub-guide rails are symmetrically arranged in the directions at both ends of the rotating shaft, the sum of the sectional moments of inertia of the two sub-guide rails is increased by 1.8 - 2.5 times compared with the original single guide rail. When the screw bears a lateral load, the symmetrically distributed sub-guide rails can respectively bear 40% - 60% of the load components, reducing the overall deflection of the guide rail system by 30% - 50%.

[0037] Specifically, when the screw moves along the rotating shaft, the two symmetrically distributed sub-guide rails synchronously bear the load of the bearing block 12 through the sliders connected to them respectively. Since the support points of the two sub-guide rails are distributed on both sides of the screw center line, a couple balance structure is formed, which can effectively offset the torque generated by the deflection of the screw.

[0038] The embodiment of the present invention realizes the uniform distribution of the force on the guide rail, improving the sliding stability during the movement of the screw. Specifically, the symmetrically distributed sub-guide rail structure balances the lateral force generated during the movement of the screw, avoiding the deformation or increased friction caused by excessive stress on a single-side guide rail. In addition, the setting of multiple sub-guide rails enhances the overall rigidity of the guide rail system, ensuring the synchronous accuracy of the module queue during long-distance variable pitch movement and reducing the cumulative error caused by the asymmetric guide rail structure. Thus, the present application improves the variable pitch adjustment stability and accuracy of the dual-axis variable pitch device, and with the symmetrically distributed screw structure, enables several module units 10 to achieve the effect of synchronous variable pitch convergence or variable pitch expansion, so as to meet the linear variable pitch operation of several module units 10.

[0039] Specifically, the dual-axis variable pitch device further includes a second linear guide rail 4, the second linear guide rail 4 is arranged parallel to the upper side of the second rotating shaft 2, and a second slider 6 is arranged on the bearing block 12 of the screw of the second rotating shaft 2, and the screw of the second rotating shaft 2 is slidably matched with the second linear guide rail 4 based on the second slider 6.

[0040] 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 moving 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 and the bearing block 12 are integrated by bolts or welding, and a lubricating coating or rolling elements can be arranged on the contact surface between the slider and the guide rail 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 is adopted. On the basis of the axial sliding of the screw connecting the bearing 13, a double constraint is formed through the cooperation of the second slider 6 and the guide rail. Among them, the rigid reference surface of the guide rail restricts the radial displacement of the screw, and the sliding surface of the slider bears the lateral load.

[0041] Specifically, when the second rotating shaft 2 drives the screw rod to move axially, the connecting bearing 13 in the bearing block 12 allows the screw rod to slide axially, while the sliding track of the second slider 6 along the second linear guide rail 4 provides linear guidance. The parallel arrangement of the guide rails makes the moving direction of the screw rod consistent with the axis of the rotating shaft, suppressing the radial offset caused by the rotation of the rotating shaft or external vibration.

[0042] 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.

[0043] The present application further proposes that a partition is provided in the middle of the second rotating shaft 2, 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.

[0044] Among them, the partition is fixedly provided at 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 central plane of the partition, and the guide groove spacing error between the two is controlled within ±0.05 mm. The top of the partition extends to the installation plane of the second linear guide rail 4 to form 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 cancels out the lateral force vectors borne by the guide rails on both sides. At the same time, the support of the partition shortens the span of the guide rail by more than 50%.

[0045] Specifically, the third sub-guide rail and the fourth sub-guide rail are respectively fixed on the support platforms on both sides of the partition by bolts, and the symmetry error of their installation reference planes relative to the central plane of the partition does not exceed 0.1 mm. When the module queue moves along the second rotating shaft 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 to form moment balance. The support of the partition reduces the maximum deflection value of the guide rail to less than 30% of that of the structure without a partition when the guide rail bears the load of the module queue. This structural arrangement effectively suppresses the elastic deformation of the guide rail, enabling the position deviation of the module unit 10 along the axial direction of the guide rail to be controlled within the range of ±0.15 mm during the long-stroke movement, and improving the accuracy by more than 60% compared with the single-guide rail structure.

[0046] Specifically, the dual-axis variable pitch device further includes a third linear guide rail 8 and a plurality of third sliders 9; A plurality of module units 10 are slidably engaged on the third linear guide rail 8 based on a plurality of the third sliders 9.

[0047] The third linear guide rail 8 is arranged in parallel between the biaxial rotating shafts or extends in the same direction as the rotating shafts, and its length covers the moving stroke of the module unit 10. The number of the third sliders 9 corresponds one-to-one with the module units 10, and each module unit 10 forms a rigid sliding connection with the third linear guide rail 8 through an independent third slider 9. The cross-sectional shape of the third linear guide rail 8 can be rectangular, trapezoidal or dovetail-shaped. For example, a rectangular cross-section guide rail is used in cooperation with a ball slider to bear radial loads. The installation position of the third slider 9 is configured within the centroid projection area of the module unit 10. Further, the slider spacing is set to 1.2 - 1.5 times the width of the module unit 10 to balance the guiding rigidity and the movement resistance. Both ends of the third linear guide rail 8 are connected to the device frame through fixing seats, and the parallelism error of the installation plane of the fixing seats is controlled within 0.02 mm / m to ensure the straightness of the guide rail.

[0048] Specifically, when the biaxial rotating drive rotates the segmented screw, the module unit 10 moves axially under the push of the screw thread. Since the third linear guide rail 8 and the module unit 10 form a sliding constraint through the third slider 9, the lateral offset of the module unit 10 is restricted within the fitting clearance range of the guide rail and the slider. When the segmented screw has local deformation due to misaligned arrangement, the rigid guiding effect of the third linear guide rail 8 can disperse and transfer the lateral force to the module unit 10, so that the displacement deviation of adjacent module units 10 is restricted within the range of a single-segment screw. Further, the ball circulation structure of the third slider 9 can compensate for the small angular deviation at the connection of the screw segments. For example, a deflection compensation of ±1° is allowed. Thus, 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, and the accuracy is improved by at least 50% compared with the scheme that only relies on screw guiding.

[0049] Specifically, the third linear guide rail 8 is arranged in parallel on the working plane of the biaxial variable pitch device, and its extending direction is consistent with the axis directions of the first rotating shaft 1 and the second rotating shaft 2. The bottom of each module unit 10 is fixedly connected with a third slider 9. The third slider 9 adopts a rolling element structure and is internally equipped with a ball cage. The cross-section of the third linear guide rail 8 is rectangular, and limiting flanges are arranged on both sides thereof. A clearance fit is formed between the side wall of the third slider 9 and the limiting flanges, and the clearance range is controlled between 0.05 - 0.1 mm. When the module unit 10 moves under the screw drive, the third slider 9 slides along the guiding surface of the third linear guide rail 8, and the parallelism error between the installation reference plane of the third linear guide rail 8 and the axis of the rotating shaft does not exceed 0.02 mm / m.

[0050] Through the above technical solution, the module unit 10 obtains double guiding constraints during the variable pitch movement. The rigid support of the third linear guide rail 8 effectively suppresses the lateral vibration caused by the gap at the connection of the segmented screw. Each module unit 10 is connected to the guide rail through an independent third slider 9, so that the local deformation of the segmented screw is dispersed and absorbed by multiple slider nodes. During the long-distance movement, the third linear guide rail 8 and the rotating shaft form a composite guiding system, and the deviation of the linear movement trajectory of the module unit 10 is controlled within the installation accuracy range of the guide rail. The synchronization error of the module queue is reduced to the order of the guide rail gap, solving the problem of cumulative error caused by the segmented screw structure.

[0051] The embodiment of the present invention provides a dual-axis variable pitch device with an ultra-long variable pitch function, which sets two parallel rotating shafts, and sleeves several segments of screws on the rotating shafts in a staggered manner. Based on the adjustment of the segmented screws, the module unit 10 correspondingly connected to each segment of the screw can achieve precise adjustment; based on the linkage connection between adjacent screws, several segments of screws can move linearly with the opening and closing of the module unit 10 to achieve variable pitch movement, so as to drive several module units 10 of each segment of the screw to perform long-distance variable pitch movement adjustment to meet the ultra-long distance variable pitch adjustment of multiple workstations and improve the use reliability of the dual-axis variable pitch device.

[0052] In addition, the above has introduced in detail a dual-axis variable pitch device with an ultra-long variable pitch function provided by the embodiment of the present invention. Specific examples are used in this article to elaborate on the principle and implementation manner of the present invention. The description of the above embodiments is only used to help understand the method and its core idea of the present invention; at the same time, for those of ordinary skill in the art, according to the idea of the present invention, there will be changes in the specific implementation manner and application scope. In summary, the content of this specification should not be construed as a limitation to the present invention.

Claims

1. A dual-axis variable pitch device with an ultra-long variable pitch function, characterized in that, The double-axis variable pitch device includes: a first rotating shaft and a second rotating shaft arranged in parallel, several screw rods, and several module units fitted on the screw rods; The several screw rods are arranged in a staggered manner on the first rotating shaft and the second rotating shaft in sequence. The several module units are connected to the several screw rods in several groups of module queues, and at least one connecting module is included in any group of module queues. The connecting module is used to connect two adjacent screw rods; The screw rod is sleeved on the first rotating shaft, and the first rotating shaft is provided with a moving space for the screw rod to move, and / or the screw rod is sleeved on the second rotating shaft, and the second rotating shaft is provided with a moving space for the screw rod to move.

2. The biaxial variable pitch device with an ultra-long variable pitch function according to claim 1, characterized in that, The several screw rods include a first sub-screw rod arranged in the middle of the first rotating shaft, and several second sub-screw rods symmetrically distributed on both sides of the first sub-screw rod; The several second sub-screw rods are arranged in a staggered manner on the first rotating shaft and the second rotating shaft in sequence.

3. The dual-axis variable pitch device with an ultra-long variable pitch function according to claim 1, characterized in that, Any one of the screw rods is provided with a variable pitch thread and a linear circular groove. One end of the connecting module is connected to the variable pitch thread of the screw rod, and the other end of the connecting module is connected to the linear circular groove of the next adjacent screw rod.

4. The dual-axis variable pitch device with an ultra-long variable pitch function according to claim 1, characterized in that, Any one of the screw rods includes a bearing seat and a connecting bearing arranged in the bearing seat. The screw rod is slidably connected to the first rotating shaft based on the connecting bearing, or the screw rod is slidably connected to the second rotating shaft based on the connecting bearing.

5. The biaxial variable pitch device with an ultra-long variable pitch function according to claim 4, characterized in that The double-axis variable pitch device further includes a first linear guide rail. The first linear guide rail is arranged in parallel above the first rotating shaft, and a first slider is arranged on the bearing seat of the screw rod on the first rotating shaft. The screw rod on the first rotating shaft is slidably matched with the first linear guide rail based on the first slider.

6. The dual-axis variable pitch device with an ultra-long variable pitch function according to claim 5, 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.

7. The dual-axis variable pitch device with an ultra-long variable pitch function according to claim 4, characterized in that, The double-axis variable pitch device further includes a second linear guide rail. The second linear guide rail is arranged in parallel above the second rotating shaft, and a second slider is arranged on the bearing seat of the screw rod on the second rotating shaft. The screw rod on the second rotating shaft is slidably matched with the second linear guide rail based on the second slider.

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

9. The dual-axis variable pitch device with an ultra-long variable pitch function according to claim 1, characterized in that, The double-axis variable pitch device further includes a third linear guide rail and several third sliders; The several module units are slidably matched on the third linear guide rail based on the several third sliders.

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