Staggered gear structure and staggered gear set

Abstract

The present application relates to the technical field of transmission device, and particularly relates to a staggered tooth gear structure and a staggered tooth gear set, the staggered tooth gear structure comprising a pre-tightening unit, the pre-tightening unit comprising a telescopic cylinder, the telescopic cylinder being provided with a first fixing buckle on the outside, the first fixing buckle being used for connecting the pre-tightening unit with a main gear; the telescopic cylinder is slidably fitted with a telescopic shaft, the telescopic shaft being provided with a first baffle and a second baffle at two ends respectively, the telescopic cylinder being provided with a first baffle ring and a second baffle ring; the first baffle is hingedly provided with a second fixing buckle, the second fixing buckle extending to the outside of the telescopic cylinder, the second fixing buckle being used for connecting the pre-tightening unit with a sub gear; further comprising an adjusting unit, the adjusting unit comprising a fixing box provided at one end of the second baffle, the fixing box being slidably fitted with a magnet, the fixing box further being provided with a spring. According to the present application, the interaction force between the two gears can be dynamically adjusted according to the operating conditions, and the operating adaptability and operating stability of the staggered tooth gear are enhanced.

Description

Technical Field

[0001] This invention relates to the field of transmission device technology, specifically to a staggered gear structure and a staggered gear set. Background Technology

[0002] Gear drives are widely used in various mechanical systems due to their advantages such as high transmission efficiency, compact structure, and stable torque transmission. However, due to factors such as gear machining and assembly errors, tooth surface deformation under stress, and thermal expansion, backlash inevitably exists during gear meshing. This backlash causes return errors when the gear rotates in both directions, reducing transmission positioning accuracy and causing tooth surface impact and vibration noise, severely restricting the performance improvement of precision transmission systems. To solve this problem, backlash-eliminating gears, also known as offset gears, have emerged. Their core principle is to use a preload structure to ensure tight contact between the meshing tooth surfaces, eliminating or minimizing backlash, thereby ensuring transmission accuracy and smooth operation.

[0003] Existing technologies have conducted extensive research on structural improvements to misaligned gears, resulting in a variety of typical solutions:

[0004] For example, a highly compatible spring-loaded double-plate gear (main gear and auxiliary gear) structure divides the gear into two coaxial gears along the axial direction. A preload is applied by springs arranged circumferentially or axially, causing the two gears to produce slight tooth misalignment, which then engages with the two sides of the mating gear's tooth surfaces to eliminate backlash. Some improvements optimize the spring mounting position (e.g., embedded spring cavities) to achieve structural miniaturization and improve space adaptability, but they still fundamentally rely on a spring with fixed stiffness to provide the preload.

[0005] For example, a disc spring preload-free structure with strong impact resistance uses a more rigid disc spring instead of a traditional cylindrical spring to enhance impact resistance and adapt to harsh working conditions such as high temperature and vibration. The preload is set by adjusting the compression of the disc spring through shims. However, once the disc spring is installed and positioned, its preload is fixed and cannot adapt in real time.

[0006] It is evident that the preload of existing staggered gears, whether spring-loaded or disc spring-preloaded, is a fixed value. This preload is determined during assembly by parameters such as spring stiffness, shim thickness, and disc spring compression. In other words, the interaction force between the two gears is fixed, and the ease of movement of the secondary gear is fixed, making dynamic adjustment impossible during operation based on speed variations. Adjustments are typically made manually in advance based on operating conditions. However, the operating conditions for staggered gears are highly variable. At high speeds, excessive preload (making secondary gear movement difficult) can exacerbate tooth surface friction and wear, increase temperature rise, and amplify vibration and noise. At low speeds, insufficient preload (making secondary gear movement easy) can lead to the recurrence of tooth flank clearance, causing tooth surface impact.

[0007] In summary, a staggered gear structure with dynamically adjustable interaction force between two gears is proposed, as well as a staggered gear set using the staggered gear structure, to solve the problems of poor adaptability and insufficient stability of existing staggered gears due to fixed preload. Summary of the Invention

[0008] To address the aforementioned problems, this invention provides a staggered gear structure and a staggered gear set, which adaptively and dynamically adjusts the interaction force between the two gears according to the operating conditions, thereby enhancing the adaptability and operational stability of the staggered gear.

[0009] To achieve the above objectives, the technical solution of the present invention is as follows:

[0010] On the one hand, a staggered gear structure is provided, including a pre-tightening unit, the pre-tightening unit including a telescopic cylinder, and a first fixing buckle is provided on the outside of the telescopic cylinder. The first fixing buckle is used to connect the pre-tightening unit with the main gear.

[0011] A telescopic shaft is slidably fitted inside the telescopic cylinder. A first baffle and a second baffle are respectively provided at both ends of the telescopic shaft. A first retaining ring and a second retaining ring are provided inside the telescopic cylinder. The first baffle is located between the first retaining ring and the second retaining ring. A tension spring is sleeved on the telescopic shaft and is located between the first baffle and the second retaining ring. A second fixing buckle is hinged to the first baffle and extends to the outside of the telescopic cylinder. The second fixing buckle is used to connect the pre-tightening unit and the auxiliary gear. The second baffle is made of ferromagnetic material.

[0012] It also includes an adjustment unit, which includes a fixed box disposed at one end of the second baffle. A magnet is slidably fitted inside the fixed box, and a spring is also disposed inside the fixed box. The spring is used to provide the restoring force after the magnet slides. The sliding path of the magnet intersects with the sliding path of the telescopic shaft.

[0013] Furthermore, the telescopic shaft and the second retaining ring are dynamically sealed, and a sealed chamber is formed between the second retaining ring and the telescopic cylinder. The sealed chamber is filled with magnetorheological fluid, and flow holes are opened on the second retaining plate.

[0014] Furthermore, a torsion spring is sleeved on the hinge shaft between the first baffle and the second fixing buckle, and the two ends of the torsion spring are fixedly connected to the first baffle and the second fixing buckle respectively.

[0015] Furthermore, an auxiliary block is provided at the bottom of the second fixing buckle, the first fixing buckle has a fixing through hole, and the second fixing buckle has a fixing blind hole.

[0016] Furthermore, several magnets are slidably fitted inside the fixed box, and all the magnets are multi-prism structures, arranged sequentially with gradually changing magnetic force.

[0017] On the other hand, a gear set with the above-mentioned staggered gear structure is provided, including a main gear and a secondary gear. A connecting shaft is provided on the side of the main gear near the secondary gear. The main gear and the secondary gear are coaxially rotatably connected through the connecting shaft. A shaft retaining ring is sleeved on the connecting shaft. The secondary gear is located between the main gear and the shaft retaining ring.

[0018] The main gear has a first mounting groove and a second mounting groove on the side near the auxiliary gear. The first mounting groove is used to install the telescopic cylinder, and the second mounting groove is used to install the fixing box. The second mounting groove intersects with the first mounting groove. The auxiliary gear has a connecting pin on the side near the main gear. The connecting pin is detachably connected to the second fixing buckle.

[0019] Furthermore, the main gear has two sets of first mounting slots and second mounting slots on the side near the secondary gear, and the two sets of first mounting slots and second mounting slots are symmetrical about the center of the main gear.

[0020] Furthermore, a secondary groove is provided on the side of the secondary gear near the main gear, and a secondary ring is detachably connected in the secondary groove, with a connecting pin set on the secondary ring; by replacing the secondary ring with a connecting pin in a different position, the angle of misalignment between the teeth of the main gear and the secondary gear can be adjusted.

[0021] Furthermore, the second mounting slot is arranged along the radial line of the main gear.

[0022] Furthermore, two fixing boxes are installed in the second mounting slot, distributed on the upper and lower sides of the first fixing buckle.

[0023] Compared to existing technologies, the above solution has the following advantages:

[0024] 1. In this design, the main gear and the auxiliary gear are connected via a first and a second fixing buckle. The main gear is fixed after being keyed to the load shaft. A tension spring pulls the auxiliary gear to rotate a small angle, thus misaligning the main gear and the auxiliary gear. During operation, the fixing box rotates with the main gear and the auxiliary gear, and the centrifugal force during rotation causes the magnet to slide.

[0025] As the gear speed increases, the centrifugal force on the magnet increases, and the attraction force of the magnet on the second baffle decreases. This increases the fluidity of the magnetorheological fluid, making it easier for the second fixing buckle to extend and retract, thus making the secondary gear easier to move.

[0026] As the gear speed decreases, the centrifugal force on the magnet decreases, and the attraction force of the magnet on the second baffle increases. This reduces the fluidity of the magnetorheological fluid, making it more difficult for the second fixing buckle to extend and retract, thus making it more difficult for the secondary gear to move.

[0027] In summary, the proposed staggered gear structure and staggered gear set allow for dynamic adjustment of the movement of the secondary gear according to the operating conditions, thus solving the problems of poor adaptability and insufficient stability caused by the existing fixed preload.

[0028] 2. In this design, the magnetic attraction acts on the second baffle, synergistically altering the fluidity of the magnetorheological fluid. The greater the centrifugal force on the magnet, the less attractive force it exerts on the second baffle. This decrease in the magnetic attraction, besides the tension spring, reduces the auxiliary magnetic force required for the second fixing buckle to move, making the secondary gear easier to move. Conversely, a greater magnetic attraction makes the secondary gear more difficult to move. By simultaneously applying magnetic attraction to both the second baffle and the magnetorheological fluid, the difficulty of the secondary gear's movement is synergistically altered, resulting in a more stable dynamic adjustment process for the ease of movement.

[0029] 3. This design incorporates two sets of centrally symmetrical staggered gear structures between the main and auxiliary gears to prevent uneven weight distribution and reduce impact vibration during operation. Furthermore, the angle of the staggered teeth between the main and auxiliary gears can be easily adjusted by replacing the auxiliary ring with a connecting pin in a different position.

[0030] 4. In this solution, the staggered gear structure is designed in a modular manner. When the staggered gear set malfunctions, the staggered gear structure can be replaced individually, reducing maintenance costs and improving maintenance efficiency. Attached Figure Description

[0031] Figure 1 This is an isometric view of an embodiment of the staggered gear set of the present invention;

[0032] Figure 2 This is an exploded view of an embodiment of the staggered gear set of the present invention;

[0033] Figure 3 This is a schematic diagram of the secondary gear structure of an embodiment of the staggered gear set of the present invention;

[0034] Figure 4 This is a schematic diagram of the main gear structure in an embodiment of the staggered-tooth gear set of the present invention;

[0035] Figure 5 This is a schematic diagram of the secondary ring structure of an embodiment of the staggered gear set of the present invention;

[0036] Figure 6 This is an isometric view of the preload unit in an embodiment of the staggered gear structure of the present invention;

[0037] Figure 7 This is a cross-sectional view of the preload unit in an embodiment of the staggered gear structure of the present invention;

[0038] Figure 8 This is an isometric view of the adjustment unit in an embodiment of the staggered gear structure of the present invention;

[0039] Figure 9 This is a cross-sectional view of the adjustment unit in an embodiment of the staggered gear set of the present invention;

[0040] Figure 10This is a partial sectional view of the connection between the main gear and the auxiliary gear in an embodiment of the staggered gear set of the present invention.

[0041] The reference numerals in the accompanying drawings include: 10, main gear; 20, secondary gear; 30, shaft retaining ring; 40, preload unit; 50, adjusting unit; 101, first mounting groove; 102, connecting shaft; 103, second mounting groove; 201, secondary ring; 202, secondary groove; 203, connecting pin; 401, first fixing section; 402, intermediate section; 403, second fixing section; 404, first fixing buckle; 405, second fixing buckle; 406, auxiliary block; 407, second baffle; 408, first baffle; 409, second retaining ring; 410, first retaining ring; 411, tension spring; 501, fixing box; 502, spring; 503, magnet. Detailed Implementation

[0042] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0043] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0044] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0045] The following detailed description illustrates the specific implementation method:

[0046] like Figure 1 and Figure 2As shown: A staggered-tooth gear set includes a staggered-tooth gear structure, a main gear 10, and a secondary gear 20. A connecting shaft 102 is provided on the side of the main gear 10 near the secondary gear 20. The main gear 10 and the secondary gear 20 are coaxially rotatably connected via the connecting shaft 102. A shaft retaining ring 30 is sleeved on the connecting shaft 102, and the secondary gear 20 is located between the main gear 10 and the shaft retaining ring 30. The main gear 10 and the secondary gear 20 can rotate relative to each other to form a staggered-tooth gear. The angle of the staggered teeth formed by the main gear 10 and the secondary gear 20 is maintained by the staggered-tooth gear structure and given a certain range of floating capability.

[0047] like Figure 3 As shown, a secondary groove 202 is formed on one side of the secondary gear 20, and several countersunk holes are formed on the other side of the secondary gear 20, extending into the secondary groove 202. A secondary ring 201 is provided in the secondary groove 202, and the secondary ring 201 has threaded holes corresponding to the countersunk holes. The secondary ring 201 is connected to the secondary gear 20 by an internal hexagonal head screw. Different secondary rings 201 can be replaced by removing the hexagonal head screw. A connecting pin 203 is provided on the secondary ring 201, such as... Figure 5 As shown, the connecting pins 203 can be preset to different positions. Since the connecting pins 203 and the secondary gear 20 are in different relative positions, the angle of the misalignment between the main gear 10 and the secondary gear 20 can be adjusted.

[0048] like Figure 4 As shown, a first mounting groove 101 and a second mounting groove 103 are provided on one side of the main gear 10. The second mounting groove 103 intersects with the first mounting groove 101 and is arranged along the radial line of the main gear 10.

[0049] like Figure 6 and Figure 7 As shown, the staggered gear structure includes a pre-tensioning unit 40, which includes a telescopic cylinder. The telescopic cylinder consists of a first fixed section 401, an intermediate section 402, and a second fixed section 403 connected in sequence. A first fixing buckle 404 is integrally formed on a side of the first fixed section 401 away from the intermediate section 402. Two first fixing buckles 404 are integrally formed on the side wall of the second fixed section 403. The three first fixing buckles 404 are located on the same plane, and each first fixing buckle 404 has a fixing through hole. The telescopic cylinder is structurally matched with the first mounting groove 101. A threaded hole is formed in the first mounting groove 101, and the threaded hole corresponds to the fixing through hole. The telescopic cylinder can be fixed to the first mounting groove 101 with screws, thus connecting the staggered gear structure to the main gear 10.

[0050] A telescopic shaft is slidably fitted inside the telescopic cylinder. A first baffle 408 and a second baffle 407 made of ferromagnetic material are respectively installed at both ends of the telescopic shaft. The first baffle 408 is located within the cylindrical space formed by the intermediate section 402 and the second fixed section 403, while the second baffle 407 is located within the first fixed section 401. A first retaining ring 410 is fixedly connected to the inner wall of the second fixed section 403, and a second retaining ring 409 is fixedly connected to the inner wall of the intermediate section 402. The first baffle 408 is located between the first retaining ring 410 and the second retaining ring 409. A tension spring 411 is sleeved on the telescopic shaft, positioned between the first baffle 408 and the second retaining ring 409, with both ends fixedly connected to the first baffle 408 and the second retaining ring 409 respectively, providing tension for the telescopic shaft to retract into the telescopic cylinder. The first baffle 408 is hinged to the second fixing buckle 405. The first retaining ring 410 is located between the second fixing buckle 405 and the first baffle 408, limiting the second fixing buckle 405 and the first baffle 408. The second fixing buckle 405 extends beyond the second fixing section 403, and the diameter of the second fixing section 403 is larger than the width of the second fixing buckle 405. The second fixing buckle 405 can rotate around the hinge axis and does not interfere with the side wall of the second fixing section 403 within a certain angle range. The second fixing buckle 405 has a fixing blind hole. After the secondary gear 20 is coaxially connected to the main gear 10, rotating the secondary gear 20 causes the connecting pin 203 to fall into the fixing blind hole, realizing the connection between the secondary gear 20 and the staggered gear structure.

[0051] The first mounting groove 101 includes space for the second fixing buckle 405 to move. An auxiliary block 406 is fixedly connected to the bottom of the second fixing buckle 405. The auxiliary block 406 is used to improve the stability of the second fixing buckle 405 under external force. The state of the main gear 10 and the secondary gear 20 after being connected by the staggered gear structure is as follows. Figure 10 As shown.

[0052] like Figure 8 and Figure 9 As shown, it also includes an adjustment unit 50, which includes a fixing box 501 made of non-metallic material, preferably made of PTFE material. The fixing box 501 is installed at one end of the telescopic cylinder, near the position where the second baffle 407 is set, and is directly installed onto... Figure 4 The second mounting slot 103 on the main gear 10 shown can be used. The fixed box 501 is hollow inside, and a spring 502 is fixedly connected to one end of the fixed box 501. A magnet 503 is slidably fitted inside the fixed box 501. Preferably, a number of magnets 503 with gradually changing magnetic force (a group of magnets 503) are arranged sequentially inside the fixed box 501. All magnets 503 used are multi-prism structures. In this embodiment, the magnets 503 used are cuboid structures.

[0053] After the fixing box 501 is installed into the second mounting slot 103, the spring 502 is located at the end away from the center of the main gear 10, and the magnet 503 with the weakest magnetic force is located at the end close to the center of the main gear 10. When the staggered gear set is running, the magnets 503 are subjected to centrifugal force and slide to compress the spring 502 towards the end away from the center of the main gear 10. The sliding path of each magnet 503 intersects with the sliding path of the telescopic shaft, causing the magnets 503 to slide and change the magnetic attraction force on the second baffle 407 under the action of centrifugal force. Preferably, two fixing boxes 501 can be installed in the second mounting slot 103. The two fixing boxes 501 are distributed on the upper and lower sides of the first fixing buckle 404, and the fixing boxes 501 are fixed to the second mounting slot 103 by an interference fit.

[0054] When the staggered gear set operates at low speeds, the centrifugal force on the magnet 503 group is small, resulting in minimal sliding. The magnetic attraction force on the second baffle 407 remains relatively large. The secondary gear 20, under the influence of the tension spring 411 and the large magnetic attraction force, is less likely to rotate relative to the main gear 10, making tooth backlash less likely to reappear and thus reducing impact. When the staggered gear set operates at high speeds, the centrifugal force on the magnet 503 group is large, resulting in significant sliding. The magnetic attraction force on the second baffle 407 shifts to a smaller state. The secondary gear 20, under the influence of the tension spring 411 and the smaller magnetic attraction force, rotates more easily relative to the main gear 10, reducing tooth surface friction and wear, thereby reducing temperature rise and vibration noise. In other words, when the staggered gear set operates at low speeds, the staggered teeth are less likely to float, meeting the requirements of low-speed operation; when the staggered gear set operates at high speeds, the staggered teeth are more likely to float, meeting the requirements of high-speed operation.

[0055] In some embodiments, to further improve the stability of the dynamic adjustment process of the ease of movement of the secondary gear 20, a dynamic seal is provided between the telescopic shaft and the second retaining ring 409, forming a sealed chamber between the second retaining ring 409 and the telescopic cylinder. The sealed chamber is filled with magnetorheological fluid, and a flow hole is provided on the second baffle 407. When there is no external magnetic field, the magnetorheological fluid is a low-viscosity Newtonian fluid; when an external magnetic field is applied, the magnetorheological fluid is a high-viscosity, low-flow Bingham fluid. There is a corresponding relationship between the viscosity of the magnetorheological fluid and the magnetic flux, that is, the smaller the external magnetic field at the same position, the higher the flowability of the magnetorheological fluid. As the running speed of the staggered gear set increases, the magnet 503 with a lower magnetic force slides to the corresponding position of the magnetorheological fluid, increasing the flowability of the magnetorheological fluid. The smaller the magnetic attraction force applied to the second baffle 407 by the cooperating magnet 503, the easier it is for the second baffle 407 to slide in the sealed chamber. Conversely, the second baffle 407 is more difficult to slide in the sealed chamber.

[0056] In addition, a torsion spring is sleeved on the hinge shaft of the first baffle 408 and the second fixing buckle 405. The two ends of the torsion spring are fixedly connected to the first baffle 408 and the second fixing buckle 405 respectively. The torsion spring provides the second fixing buckle 405 with the reset force after rotation, so that the second fixing buckle 405 follows the floating of the secondary gear 20, and the fixing blind hole always maintains a stable fit with the connecting pin 203.

[0057] In some embodiments, the main gear 10 has two sets of first mounting slots 101 and second mounting slots 103 on the side near the secondary gear 20, and the two sets of first mounting slots 101 and second mounting slots 103 are symmetrical about the center of the main gear 10. A telescopic cylinder and a fixing box 501 are installed in each of the two sets of first mounting slots 101 and second mounting slots 103. The telescopic cylinder, as the core of the pre-tightening unit 40, provides pre-tightening force to the main gear 10 and secondary gear 20 at a position symmetrically located to the center of the staggered gear set. The fixing box 501, as the core of the adjusting unit 50, provides adjustment of the pre-tightening force to the main gear 10 and secondary gear 20 at a position symmetrically located to the center of the staggered gear set. This makes the staggered gear set more stable during operation.

[0058] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. A staggered gear structure, comprising a preload unit, characterized in that, The pre-tensioning unit includes a telescopic cylinder, and a first fixing buckle is provided on the outside of the telescopic cylinder. The first fixing buckle is used to connect the pre-tensioning unit to the main gear. A telescopic shaft is slidably fitted inside the telescopic cylinder. A first baffle and a second baffle are respectively installed at both ends of the telescopic shaft. A first retaining ring and a second retaining ring are installed inside the telescopic cylinder. The first baffle is located between the first retaining ring and the second retaining ring. A tension spring is sleeved on the telescopic shaft and is positioned between the first baffle and the second retaining ring. Both ends of the tension spring are fixedly connected to the first baffle and the second retaining ring, respectively. A second fixing buckle is hinged to the first baffle and extends outside the telescopic cylinder. The second fixing buckle is used to connect the pre-tightening unit to the auxiliary gear. The second baffle is made of ferromagnetic material. It also includes an adjustment unit, which includes a fixed box located at one end of the second baffle. Several magnets are slidably fitted inside the fixed box. The magnets are arranged in sequence and their magnetic force gradually changes. A spring is also provided inside the fixed box. The spring is used to provide the restoring force after the magnet slides. The sliding path of the magnet intersects with the sliding path of the telescopic shaft.

2. The staggered gear structure according to claim 1, characterized in that, The telescopic shaft and the second retaining ring are dynamically sealed, and a sealed chamber is formed between the second retaining ring and the telescopic cylinder. The sealed chamber is filled with magnetorheological fluid, and a flow hole is opened on the second retaining plate.

3. The staggered gear structure according to claim 1, characterized in that, A torsion spring is fitted onto the hinge shaft between the first baffle and the second fixing buckle, with both ends of the torsion spring being fixedly connected to the first baffle and the second fixing buckle, respectively.

4. The staggered gear structure according to claim 1, characterized in that, The second fixing buckle has an auxiliary block at its bottom, the first fixing buckle has a fixing through hole, and the second fixing buckle has a fixing blind hole.

5. The staggered gear structure according to claim 1, characterized in that, The magnets are all multi-faceted prism structures.

6. A staggered gear set, characterized in that, The gear structure comprising any one of claims 1-5, a main gear and a secondary gear, wherein a connecting shaft is provided on the side of the main gear near the secondary gear, the main gear and the secondary gear are coaxially rotatably connected through the connecting shaft, a shaft retaining ring is sleeved on the connecting shaft, and the secondary gear is located between the main gear and the shaft retaining ring; The main gear has a first mounting groove and a second mounting groove on the side near the auxiliary gear. The first mounting groove is used to install the telescopic cylinder, and the second mounting groove is used to install the fixing box. The second mounting groove intersects with the first mounting groove. The auxiliary gear has a connecting pin on the side near the main gear. The connecting pin is detachably connected to the second fixing buckle.

7. The staggered gear set according to claim 6, characterized in that, The main gear has two sets of first mounting slots and second mounting slots on the side near the secondary gear, and the two sets of first mounting slots and second mounting slots are symmetrical about the center of the main gear.

8. The staggered gear set according to claim 7, characterized in that, The secondary gear has a secondary groove on the side near the main gear, and a secondary ring is detachably connected in the secondary groove. A connecting pin is set on the secondary ring. By replacing the secondary ring with a connecting pin in a different position, the angle of the misalignment between the teeth of the main gear and the secondary gear can be adjusted.

9. The staggered gear set according to claim 6, characterized in that, The second mounting slot is arranged along the radial line of the main gear.

10. The staggered gear set according to claim 6, characterized in that, Two fixing boxes are installed in the second mounting slot, located on the upper and lower sides of the first fixing buckle.

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