Differential drive multi-station working platform

Abstract

The invention relates to the technical field of working platforms, in particular to a differential drive multi-station working platform. In order to solve the problems that friction exists due to the fact that an existing multi-station platform shares a guide rail, driving force fluctuation can cause hundred-nanometer-level displacement fluctuation, precise positioning is difficult to achieve, and the ultra-precise multi-station operation, especially the detection precision requirement cannot be met, the following technical scheme is provided, and the multi-station platform comprises a bottom plate and a plurality of sets of working platforms arranged above the bottom plate; the at least one group of sliding tables are positioned on the side edge of the working platform; the first adjusting assembly is arranged between the working platform and the sliding table, the first adjusting assembly comprises a first servo motor which is movably arranged, the output end of the first servo motor is fixedly connected with a first coaxial rod, and the first coaxial rod is composed of two lead screws which are the same in rotation direction and different in lead. According to the invention, the friction influence of the guide rail can be eliminated, the driving force fluctuation can be counteracted, precise positioning is realized, and the precision requirement of ultra-precise multi-station operation, especially detection, is met.

Description

Technical Field

[0001] The present invention relates to the technical field of work platforms, and in particular to a differential drive multi-station work platform. Background Art

[0002] The application of multi-station operation is becoming more and more extensive, which places extremely high demands on the positioning accuracy of the work platform. Especially in multi-station inspection scenarios, ultra-precision multi-station work platforms have become indispensable key equipment.

[0003] To meet the need for independent movement of each workstation, existing multi-station platforms generally use a shared guide rail design, coupled with non-contact drive methods such as linear motors. This design approach aims to reduce interference through non-contact drive, thereby improving the platform's movement independence and flexibility.

[0004] However, in practical applications, the accuracy of existing multi-station platforms struggles to meet nanometer-level positioning standards. This is primarily due to two issues: First, guide rail friction directly impacts the platform's motion accuracy. While some platforms employ air-bearing guide rails to eliminate frictional interference, thereby improving the accuracy loss caused by friction to a certain extent, the problem of driving force fluctuations persists, causing platform displacement fluctuations and restricting further improvements in the platform's overall accuracy. This makes it impossible to meet the stringent positioning accuracy requirements of ultra-precision multi-station operations, particularly multi-station inspections. In light of this, the present invention proposes a differentially driven multi-station work platform. Summary of the Invention

[0005] The purpose of the present invention is to propose a differential drive multi-station work platform to address the problems in the background technology that the existing multi-station platform has friction due to the shared guide rail, and the fluctuation of the driving force will cause displacement fluctuations of hundreds of nanometers, making it difficult to achieve precise positioning and unable to meet the requirements of ultra-precision multi-station operation, especially detection accuracy.

[0006] The technical solution of the present invention is as follows: a differentially driven multi-station work platform, comprising a base plate and multiple groups of work platforms arranged above the base plate; at least one group of slides located on the side of the work platform; a first adjustment component arranged between the work platform and the slide, the first adjustment component comprising a movably arranged first servo motor, the output end of the first servo motor being fixedly connected to a first coaxial rod, the first coaxial rod being composed of two sections of screw rods with the same rotation direction and different leads, the work platform and the slide respectively correspond to the two sections of thread of the screw rod, and when the first coaxial rod rotates, the displacement of the work platform is controlled by the difference in the leads of the two screws.

[0007] Optionally, it further includes a first driving mechanism installed on the top of the base plate, the first driving mechanism includes a linear motor, the linear motor is provided with a plurality of groups of movers equal to the number of the working platforms, the movers are fixedly connected to the slide, and the slide is moved by a limit assembly;

[0008] The limiting assembly includes two groups of first sliding blocks fixedly connected to the working platform and the bottom of the slide respectively. First sliding rails parallel to the linear motor are provided on both sides of the linear motor, and multiple groups of the first sliding blocks are respectively slidably connected to the two groups of first sliding rails.

[0009] Optionally, the first adjustment component also includes a first mounting block fixedly connected to the first servo motor, a second slide rail fixedly connected to one side of the first mounting block, a second slider slidably connected in the second slide rail, the second slider is fixedly connected to the working platform or slide, the first coaxial rod is composed of a first screw rod and a second screw rod coaxially connected in a linear manner, the first screw rod and the second screw rod are arranged parallel to the second slide rail, a second threaded sleeve is threadedly connected to the second screw rod, and the outer ring of the second threaded sleeve is fixedly connected to the second connecting plate.

[0010] Optionally, a first threaded sleeve is threadedly connected to the first screw rod, a first connecting plate is fixedly connected to the outer ring of the first threaded sleeve, the second connecting plate and the first connecting plate are respectively fixedly connected to the working platform or the slide, and the first screw rod and the second screw rod have the same rotation direction and different lead.

[0011] Optionally, it also includes an output plate located above the working platform and orthogonal to each other, a synchronization plate is provided on one side of the output plate; a second adjustment component is provided between the output plate and the synchronization plate, the second adjustment component includes a movably arranged second servo motor, the output end of the second servo motor is fixedly connected to a second coaxial rod, the second coaxial rod is composed of two sections of screw rods with the same rotation direction and different leads, the output plate and the synchronization plate respectively correspond to the two sections of thread of the screw rod, and when the second coaxial rod rotates, the displacement of the output plate is controlled by the difference in the leads of the two screws.

[0012] Optionally, the second adjustment assembly also includes a second mounting block fixedly connected to the side of the second servo motor, a third slide rail fixedly connected to the side of the second mounting block, the third slide rail is arranged perpendicular to the second slide rail, a third slider is slidably connected to the third slide rail, the third slider is fixedly connected to the output plate or the synchronization plate, the second coaxial rod is composed of a third screw rod and a fourth screw rod coaxially connected in a straight line, the third screw rod and the fourth screw rod are both arranged parallel to the third slide rail, a fourth threaded sleeve is threadedly connected to the fourth screw rod, and the outer ring of the fourth threaded sleeve is fixedly connected to the fourth connecting plate.

[0013] Optionally, a third threaded sleeve is threadedly connected to the third screw rod. An outer ring of the third threaded sleeve is fixedly connected to a third connecting plate. The third connecting plate and the fourth connecting plate are respectively fixedly connected to the output plate or the synchronization plate.

[0014] Optionally, the third screw rod and the fourth screw rod have the same helix direction but different leads.

[0015] Optionally, it further includes a second driving mechanism installed on the top of the working platform. The second driving mechanism is used to drive the output plate and the synchronization plate to move. The second driving mechanism includes a moving seat fixedly connected to the top of the working platform. The moving seat is arranged in a "U" shape. Side plates are fixedly connected to both sides of the moving seat. A third servo motor is installed on one side of a group of side plates away from the moving seat. An output end of the third servo motor penetrates through the side plate and is fixedly connected to a fifth screw rod. The fifth screw rod is arranged parallel to the third slide rail. A fifth threaded sleeve is threadedly connected to the fifth screw rod. An outer ring of the fifth threaded sleeve is fixedly connected to a fifth connecting plate. The fifth connecting plate is fixedly connected to the bottom of the synchronization plate.

[0016] Optionally, two fourth slide rails parallel to the fifth screw rod are fixedly connected to the top of the moving seat. Fourth sliders are slidably connected to both of the two fourth slide rails. The two fourth sliders are fixedly connected to the bottom of the output plate. Fifth sliders are slidably connected to both of the two fourth slide rails. The two fifth sliders are fixedly connected to the bottom of the synchronization plate.

[0017] In summary, the present application includes at least one of the following beneficial technical effects:

[0018] Through the differential drive design of the first adjustment component and the second adjustment component, the present invention uses screw rods with the same helix direction but different leads to achieve a small displacement when the servo motor rotates. At the same time, with the limiting effect of each slide rail and slider, the influence of driving force fluctuation is effectively offset. Finally, the nanoscale precise positioning of the output plate in the two-dimensional direction is achieved, meeting the requirements of ultra-high precision in scenarios such as multi-station detection;

[0019] Furthermore, the linear motor of the first driving mechanism drives multiple movers and the working platform to move independently. The third servo motor of the second driving mechanism drives the output plate and the synchronization plate to move synchronously through the fifth screw rod, realizing the independent movement and rough adjustment of each station. And the first adjustment component and the second adjustment component can perform precise fine-tuning on the basis of rough adjustment. The combination of the two enables the platform to not only meet the requirements of multi-station independent operation but also flexibly achieve high-precision position control, improving the applicability of the equipment in complex multi-station scenarios;

[0020] In summary, the present invention can eliminate the influence of guide rail friction and offset the driving force fluctuation, achieve precise positioning, and meet the precision requirements of ultra-precise multi-station operations, especially detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural diagram of a differential drive multi-station work platform;

[0022] Figure 2 is a structural schematic diagram of the first driving mechanism;

[0023] Figure 3 is a partial cross-sectional schematic diagram of the first adjustment component;

[0024] Figure 4 is a schematic cross-sectional structural diagram of the second adjustment component;

[0025] Figure 5 It is a schematic cross-sectional structural diagram of the second driving mechanism.

[0026] Reference numerals:

[0027] 1. Base plate; 2. Working platform; 3. First drive mechanism; 31. Linear motor; 32. Mover; 33. Slide; 34. First slider; 35. First slide rail;

[0028] 4. First adjustment assembly; 41. Second slider; 42. Second slide rail; 43. First mounting block; 44. First servo motor; 45. First screw rod; 46. Second screw rod; 47. Second threaded sleeve; 48. Second connecting plate; 49. First threaded sleeve; 410. First connecting plate;

[0029] 5. Output plate; 6. Synchronizing plate; 7. Second adjustment assembly; 71. Third slider; 72. Third slide rail; 73. Second mounting block; 74. Second servo motor; 75. Third screw rod; 76. Fourth screw rod; 77. Fourth threaded sleeve; 78. Fourth connecting plate; 79. Third threaded sleeve; 710. Third connecting plate;

[0030] 8. Second driving mechanism; 81. Moving seat; 82. Side plate; 83. Third servo motor; 84. Fifth lead screw; 85. Fifth threaded sleeve; 86. Fifth connecting plate; 87. Fourth slide rail; 88. Fourth slider; 89. Fifth slider. DETAILED DESCRIPTION

[0031] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0032] The components of the embodiments of the present invention generally described and shown in the drawings herein may be arranged and designed in a variety of different configurations. Therefore, the following detailed description of the embodiments of the invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the invention.

[0033] Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative work shall fall within the scope of protection of the present invention.

[0034] In the description of the present invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate and simplify the description of the present invention. They are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation, and therefore should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," "fourth," and "fifth" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0035] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0036] Example 1

[0037] like Figure 1 As shown, the differential drive multi-station work platform proposed by the present invention includes a base plate 1 and multiple groups of work platforms 2 arranged above the base plate 1. It also includes at least one group of slides 33 located on the side of the work platform 2. When the slides 33 move, the work platform 2 moves synchronously.

[0038] For further information, see Figure 1 and Figure 2The above-mentioned working platform includes a first driving mechanism 3 installed on the top of the base plate 1. The first driving mechanism 3 is used to drive the working platform 2 to move. The first driving mechanism 3 includes a linear motor 31. The linear motor 31 is provided with a plurality of groups of movers 32 equal to the number of the working platforms 2. The linear motor 31 is used to drive the plurality of groups of movers 32, thereby driving the plurality of groups of working platforms 2 to move. At least one group of slides 33 is fixedly connected to the movers 32. When the movers 32 move, the slides 33 move synchronously. When the movers 32 stop, the position of the slides 33 is fixed. The slides 33 are moved smoothly by a limiting assembly. The limiting assembly includes two groups of first sliders 34 fixedly connected to the bottom of the working platform 2 and the slides 33, respectively. First slide rails 35 parallel to the linear motor 31 are provided on both sides. The plurality of groups of first sliders 34 are respectively slidably connected to the two groups of first slide rails 35. The limiting action of the first sliders 34 and the first slide rails 35 ensures the smooth movement of the working platform 2 and the slides 33.

[0039] Furthermore, if Figure 3As shown, the above-mentioned working platform also includes a first adjustment component 4 arranged between the working platform 2 and the first drive mechanism 3. The first adjustment component 4 includes a movable first servo motor 44. The first servo motor 44 slides with the working platform 2 or the slide 33. The output end of the first servo motor 44 is fixedly connected to a first coaxial rod. The first coaxial rod is composed of two sections of screws with the same rotation direction and different leads. The working platform 2 and the slide 33 correspond to the two sections of the screw thread respectively. When the first coaxial rod rotates, the difference in the lead of the two screws controls the displacement of the working platform 2, and the position of the working platform 2 is accurately adjusted. The first adjustment component 4 also includes a first mounting block 43 fixedly connected to the first servo motor 44. A second slide rail 42 is fixedly connected to one side of the first mounting block 43. A second slider 41 is slidably connected to the second slide rail 42. Under the limiting action of the second slider 41 and the second slide rail 42, the movement of the first mounting block 43 is smooth. The second slider 41 is fixedly connected to the work platform 2 or the slide 33. The first coaxial rod is composed of a first screw rod 45 and a second screw rod 46 connected coaxially and linearly. After the first servo motor 44 is activated, it drives the first screw rod 45 and the second screw rod 46 to rotate synchronously. The first screw rod 45 and the second screw rod 46 are arranged parallel to the second slide rail 42. The second screw rod 46 is threaded with a second threaded sleeve 47. The outer ring of the second threaded sleeve 47 is fixedly connected to a second connecting plate 48. The second connecting plate 48 is fixedly connected to the bottom of a set of slides 33. The second threaded sleeve 47 and the second connecting plate 48 are fixed in position, so that the second screw rod 46 moves along its own length when rotating, and is driven by the first servo motor 44 to move via the first screw rod 45. The first screw rod 45 is threaded with a first threaded sleeve 49. When the first screw rod 45 rotates, it drives the first threaded sleeve 49 to move along the length of the first screw rod 45. The outer ring of the first threaded sleeve 49 is fixedly connected to the first connecting plate 410 , and the first connecting plate 410 is fixedly connected to the bottom of the working platform 2 . When the first threaded sleeve 49 moves, it drives the working platform 2 to move through the first connecting plate 410 .

[0040] It is worth mentioning that the first screw rod 45 and the second screw rod 46 have the same rotation direction but different leads. Assuming the lead of the first screw rod 45 is 0.4 mm and the lead of the second screw rod 46 is 0.5 mm, when the first servo motor 44 drives the first and second screw rods 45, 46 to rotate one revolution, because the second threaded sleeve 47 and the second connecting plate 48 are fixed in position, the second screw rod 46 moves 0.5 mm along its own length during one revolution, thereby driving the first screw rod 45 and the first servo motor 44 to move 0.5 mm. Because the first and second screw rods 45, 46 have the same rotation direction, the first screw rod 45 simultaneously drives the work platform 2 in the opposite direction by 0.4 mm through the first threaded sleeve 49 and the first connecting plate 410 during one revolution. As a result, when the first servo motor 44 drives the first and second screw rods 45, 46 to rotate one revolution, the work platform 2 only moves 0.1 mm, achieving precise adjustment of the position of the work platform 2.

[0041] In this embodiment, after the linear motor 31 is activated, it drives multiple groups of movers 32, which in turn drive the slides 33 on both sides to move synchronously. The work platform 2, guided by the first slider 34 and the first rail 35, moves smoothly with the movers 32 and slides 33. When the movers 32 stop, the slides 33 remain fixed, providing a stable reference for the work platform 2.

[0042] Afterwards, the first servo motor 44 is started, driving the first screw rod 45 and the second screw rod 46 with the same rotation direction but different lead to rotate synchronously. Since the second threaded sleeve 47 is fixed to the second connecting plate 48 at the bottom of the slide 33, the second screw rod 46 will move along its own length when it rotates, thereby driving the first screw rod 45 and the first servo motor 44 to move. At the same time, the first screw rod 45 drives the working platform 2 to move in the opposite direction of the movement direction of the first servo motor 44 through the first threaded sleeve 49 and the first connecting plate 410. Due to the difference in the lead of the two screw rods, the lead of the first screw rod 45 is 0.4mm and the lead of the second screw rod 46 is 0.5mm. When the motor rotates one circle, the working platform 2 finally moves only 0.1mm, achieving high-precision fine-tuning.

[0043] Example 2

[0044] like Figure 2 As shown, based on the first embodiment, the above-mentioned working platform includes an output plate 5 located above the working platform 2 and orthogonal to each other, and a synchronization plate 6 is provided on one side of the output plate 5, and the position of the output plate 5 is adjusted with the synchronization plate 6 as a reference.

[0045] Further, such as Figure 4As shown, the above-mentioned working platform includes a second adjustment assembly 7 disposed between the output plate 5 and the synchronization plate 6. The second adjustment assembly 7 includes a movably mounted second servo motor 74. The output end of the second servo motor 74 is fixedly connected to a second coaxial rod. The second coaxial rod is composed of two sections of a screw with the same rotation direction and different leads. The output plate 5 and the synchronization plate 6 respectively correspond to the two sections of the screw thread. When the second coaxial rod rotates, the difference in the leads of the two screws controls the displacement of the output plate 5. The second adjustment assembly 7 is used to precisely adjust the position of the output plate 5. The second adjustment assembly 7 also includes a second mounting block 73 fixedly connected to the side of the second servo motor 74. The second mounting block 73 is fixedly connected to the side of the third slide rail 72. The third slide rail 72 is arranged perpendicular to the second slide rail 42. The third slider 71 is slidably connected to the third slide rail 72. The limiting action of the third slider 71 and the third slide rail 72 ensures the smooth movement of the second mounting block 73. The third slider 71 is fixedly connected to the output plate 5 or the synchronization plate 6. The second coaxial rod is composed of a third screw rod 75 and a fourth screw rod 76 connected coaxially and linearly. When the second servo motor 74 is activated, the third and fourth screw rods 75 and 76 rotate synchronously. The third and fourth screw rods 75 and 76 are both arranged parallel to the third slide rail 72. A fourth threaded sleeve 77 is threadedly connected to the fourth screw rod 76. The outer ring of the fourth threaded sleeve 77 is fixedly connected to a fourth connecting plate 78. The fourth connecting plate 78 is fixedly connected to the bottom of the synchronization plate 6. The fourth threaded sleeve 77 and the fourth connecting plate 78 are fixed in position. As the fourth screw rod 76 rotates, it moves along its own length and is driven by the second servo motor 74 through the third screw rod 75. A third threaded sleeve 79 is threadedly connected to the third screw rod 75. As the third screw rod 75 rotates, it drives the third threaded sleeve 79 to move along the length of the third screw rod 75. The outer ring of the third threaded sleeve 79 is fixedly connected to the third connecting plate 710 , which is fixedly connected to the bottom of the output plate 5 . When the third threaded sleeve 79 moves, the output plate 5 is driven to move by the third connecting plate 710 .

[0046] It's worth noting that the third and fourth screw rods 75 and 76 have the same rotational direction but different leads. Assuming the lead of the third screw rod 75 is 0.4 mm and the lead of the fourth screw rod 76 is 0.5 mm, when the second servo motor 74 drives the third and fourth screw rods 75 and 76 to rotate one revolution, because the fourth threaded sleeve 77 and the fourth connecting plate 78 are fixed in position, the fourth screw rod 76 moves 0.5 mm along its length during one rotation, thereby driving the third screw rod 75 and the second servo motor 74 to move 0.5 mm. Because the third and fourth screw rods 75 and 76 have the same rotational direction, each rotation of the third screw rod 75 simultaneously drives the output plate 5 in the opposite direction by 0.4 mm via the third threaded sleeve 79 and the third connecting plate 710. As a result, when the second servo motor 74 drives the third and fourth screw rods 75 and 76 to rotate one revolution, the output plate 5 only moves 0.1 mm, achieving precise adjustment of the output plate 5's position. By cooperating with the first adjusting component 4 and the second adjusting component 7 , the position of the output plate 5 is precisely adjusted in two dimensions to ensure the accuracy of its positioning.

[0047] For further information, see Figure 1 and Figure 5, the above working platform further includes a second driving mechanism 8 installed on the top of the working platform 2. The second driving mechanism 8 is used to drive the output plate 5 and the synchronization plate 6 to move. The second driving mechanism 8 includes a moving seat 81 fixedly connected to the top of the working platform 2. The moving seat 81 is arranged in a "U" shape, and the working platform 2 drives the moving seat 81 to move synchronously when moving. Side plates 82 are fixedly connected to both sides of the moving seat 81. A third servo motor 83 is installed on one side of a group of side plates 82 away from the moving seat 81. The output end of the third servo motor 83 penetrates through the side plate 82 and is fixedly connected to a fifth screw rod 84. After the third servo motor 83 is started, it drives the fifth screw rod 84 to rotate. The fifth screw rod 84 is arranged parallel to the third slide rail 72, so the fifth screw rod 84 is arranged perpendicular to the first slide rail 35, which is convenient for roughly adjusting the position of the output plate 5. A fifth threaded sleeve 85 is threadedly connected to the fifth screw rod 84. When the fifth screw rod 84 rotates, it drives the fifth threaded sleeve 85 to move along the length direction of the fifth screw rod 84. The outer ring of the fifth threaded sleeve 85 is fixedly connected to a fifth connecting plate 86. The fifth connecting plate 86 is fixedly connected to the bottom of the synchronization plate 6. When the fifth threaded sleeve 85 moves, it drives the synchronization plate 6 to move synchronously through the fifth connecting plate 86. And in the case where the second servo motor 74 is not started, the output plate 5 and the synchronization plate 6 are connected by the third screw rod 75 and the fourth screw rod 76, so that the output plate 5 and the synchronization plate 6 move synchronously. Two groups of fourth slide rails 87 parallel to the fifth screw rod 84 are fixedly connected to the top of the moving seat 81. Fourth sliders 88 are slidably connected to both groups of fourth slide rails 87. The two groups of fourth sliders 88 are fixedly connected to the bottom of the output plate 5. Fifth sliders 89 are slidably connected to both groups of fourth slide rails 87. The two groups of fifth sliders 89 are fixedly connected to the bottom of the synchronization plate 6. The limiting effects of the fourth slide rails 87, the fourth sliders 88 and the fifth sliders 89 make the movement of the output plate 5 and the synchronization plate 6 stable.

[0048] In this embodiment, after the position of the working platform 2 is finely adjusted with high precision, the third servo motor 83 drives the fifth screw rod 84 to rotate, so that the fifth threaded sleeve 85 drives the synchronization plate 6 to move through the fifth connecting plate 86. The output plate 5 moves synchronously with the synchronization plate 6 under the limiting of the third slider 71 and the third slide rail 72 and the linkage of the second adjustment component 7, completing the rough position adjustment. Then the second servo motor 74 drives the third screw rod 75 and the fourth screw rod 76 to rotate. By means of their opposite thread directions and different lead pitches, the lead pitch of the third screw rod 75 is 0.4 mm, and the lead pitch of the fourth screw rod 76 is 0.5 mm. When the motor rotates one circle, the output plate 5 only moves 0.1 mm. Through the coordinated action of the first adjustment component 4 in the direction parallel to the first slide rail 35 and the second adjustment component 7 in the direction perpendicular to the first slide rail 35, the precise positioning of the output plate 5 in the two-dimensional direction is realized, effectively ensuring the ultra-high precision requirements of multi-station operation.

[0049] The above specific embodiments are merely several optional embodiments of the present invention. Based on the technical solutions of the present invention and the relevant inspirations of the above embodiments, those skilled in the art may make various alternative improvements and combinations to the above specific embodiments.

Claims

1. Differential drive multi-station work platform, characterized by: include: A base plate (1) and a plurality of working platforms (2) arranged above the base plate (1); At least one set of slides (33) located on the side of the working platform (2); A first adjustment component (4) is arranged between the working platform (2) and the slide (33), the first adjustment component (4) includes a first servo motor (44) that is movably arranged, the output end of the first servo motor (44) is fixedly connected to a first coaxial rod, the first coaxial rod is composed of two sections of screw rods with the same rotation direction and different leads, the working platform (2) and the slide (33) are respectively matched with the two sections of the screw thread, and when the first coaxial rod rotates, the displacement of the working platform (2) is controlled by the difference in the leads of the two screws.

2. The differential drive multi-station work platform according to claim 1, characterized in that: The machine also includes a first driving mechanism (3) mounted on the top of the base plate (1), the first driving mechanism (3) including a linear motor (31), a plurality of groups of movers (32) equal in number to the number of the working platform (2) being provided on the linear motor (31), the movers (32) being fixedly connected to a slide (33), and the slide (33) being movable by a limiting assembly; The limiting assembly comprises two groups of first sliding blocks (34) respectively fixedly connected to the bottom of the working platform (2) and the slide (33); first slide rails (35) parallel to the linear motor (31) are provided on both sides; and a plurality of groups of the first sliding blocks (34) are respectively slidably connected to the two groups of first slide rails (35).

3. The differential drive multi-station work platform according to claim 2, characterized in that: The first adjustment assembly (4) also includes a first mounting block (43) fixedly connected to the first servo motor (44), a second slide rail (42) fixedly connected to one side of the first mounting block (43), a second slider (41) slidably connected in the second slide rail (42), the second slider (41) fixedly connected to the working platform (2) or the slide (33), the first coaxial rod is composed of a first screw rod (45) and a second screw rod (46) connected coaxially and linearly, the first screw rod (45) and the second screw rod (46) are arranged parallel to the second slide rail (42), a second threaded sleeve (47) is threadedly connected to the second screw rod (46), and the outer ring of the second threaded sleeve (47) is fixedly connected to the second connecting plate (48).

4. The differential drive multi-station work platform according to claim 3, characterized in that: The first screw rod (45) is threadedly connected to a first threaded sleeve (49), the outer ring of the first threaded sleeve (49) is fixedly connected to a first connecting plate (410), the second connecting plate (48) and the first connecting plate (410) are respectively fixedly connected to the working platform (2) or the slide (33), and the first screw rod (45) and the second screw rod (46) have the same rotation direction but different leads.

5. The differential drive multi-station work platform according to claim 4, characterized in that: Also includes: An output plate (5) is located above the working platform (2) and is orthogonal to each other, and a synchronization plate (6) is provided on one side of the output plate (5); A second adjusting component (7) disposed between the output board (5) and the synchronization board (6). The second adjusting component (7) includes a second servo motor (74) movably arranged. The output end of the second servo motor (74) is fixedly connected with a second coaxial rod which is composed of two lead screws with the same helix direction and different leads. The output board (5) and the synchronization board (6) are respectively in threaded fit with the two segments of the lead screw. When the second coaxial rod rotates, the displacement of the output board (5) is controlled by the change in the difference between the two lead screw pitches.

6. The differential drive multi-station work platform according to claim 5, characterized in that: The second adjusting component (7) further includes a second mounting block (73) fixedly connected to the side of the second servo motor (74). A third slide rail (72) is fixedly connected to the side of the second mounting block (73). The third slide rail (72) is perpendicular to the second slide rail (42). A third slider (71) is slidably connected to the third slide rail (72). The third slider (71) is fixedly connected to the output board (5) or the synchronization board (6). The second coaxial rod is composed of a third lead screw (75) and a fourth lead screw (76) connected coaxially in a straight line. Both the third lead screw (75) and the fourth lead screw (76) are arranged parallel to the third slide rail (72). A fourth threaded sleeve (77) is threadedly connected to the fourth lead screw (76). An outer ring of the fourth threaded sleeve (77) is fixedly connected with a fourth connecting plate (78).

7. The differential drive multi-station work platform according to claim 6, characterized in that: A third threaded sleeve (79) is threadedly connected to the third lead screw (75). An outer ring of the third threaded sleeve (79) is fixedly connected with a third connecting plate (710). The third connecting plate (710) and the fourth connecting plate (78) are respectively fixedly connected to the output board (5) or the synchronization board (6).

8. The differential drive multi-station work platform according to claim 7, characterized in that: The third lead screw (75) and the fourth lead screw (76) have the same helix direction and different leads.

9. The differential drive multi-station work platform according to claim 8, characterized in that: It further includes a second driving mechanism (8) installed on the top of the working platform (2). The second driving mechanism (8) is used to drive the output board (5) and the synchronization board (6) to move. The second driving mechanism (8) includes a moving seat (81) fixedly connected to the top of the working platform (2). The moving seat (81) is arranged in a "U" shape. Side plates (⑧2) are fixedly connected to both sides of the moving seat (81). A third servo motor (83) is installed on one side of a group of the side plates (8) away from the moving seat (81). The output end of the third servo motor (83) penetrates through the side plate (82) and is fixedly connected with a fifth lead screw (84). The fifth lead screw (84) is arranged parallel to the third slide rail (72). A fifth threaded sleeve (85) is threadedly connected to the fifth lead screw (84). An outer ring of the fifth threaded sleeve (85) is fixedly connected with a fifth connecting plate (86). The fifth connecting plate (86) is fixedly connected to the bottom of the synchronization board (6).

10. The differential drive multi-station work platform according to claim 9, characterized in that: The top of the movable seat (81) is fixedly connected with two groups of fourth slide rails (87) arranged parallel to the fifth screw rod (84), and the two groups of the fourth slide rails (87) are slidably connected with fourth sliders (88), and the two groups of the fourth sliders (88) are fixedly connected to the bottom of the output plate (5). The two groups of the fourth slide rails (87) are slidably connected with fifth sliders (89), and the two groups of the fifth sliders (89) are fixedly connected to the bottom of the synchronization plate (6).

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