A step-by-step locking mechanism with gear drive

Abstract

The present invention relates to a stepped locking mechanism for gear transmission, which comprises a spiral ring, a locking ring, a steel ball support and a bottom cover. Steel balls are provided on the steel ball support. The spiral ring is rotatably connected to the bottom cover. Both the steel ball support and the locking ring are slidably connected to the outer side wall of the spiral ring. A driving assembly is provided on the bottom cover. The rotation of the spiral ring drives the steel ball support and the locking ring to move upward or downward in sequence along the vertical direction. The advantages of the present invention are as follows: By driving the spiral ring to rotate on the bottom cover through the driving assembly, since the rotation of the spiral ring drives the steel ball support and the locking ring to move upward or downward in sequence along the vertical direction, the stepped movement of the steel ball support and the locking ring can be realized. Moreover, it can ensure that the steel ball support and the locking ring move independently on the spiral ring, and there is no spatial interference between the two during the ascending and descending processes, improving the stability of stepped transmission and solving the problem of large locking friction force.

Description

Technical Field

[0001] The present invention relates to a hierarchical locking mechanism for gear transmission. Background Art

[0002] At present, modular design is one of the main research directions for future space vehicles, and the general interface design of modules is a key technology for vehicle modularization. When replacing or performing other operation tasks on vehicle modules, general interfaces are respectively installed at the end of the robotic arm and on the vehicle module. The two interfaces are docked with each other to meet the connection between the robotic arm and the vehicle module. During operation, in order to enable the robotic arm to perform various action operations on the vehicle module, certain locking performance and stiffness requirements need to be met after the interfaces are docked. Summary of the Invention

[0003] The purpose to be achieved by the present invention is to provide a hierarchical locking mechanism for gear transmission, which can not only realize automatic locking and automatic separation after the docking mechanism is connected, but also improve the locking performance.

[0004] To solve the above technical problems, the present invention is realized through the following technical solutions: A hierarchical locking mechanism for gear transmission is used for automatic locking and separation of a modular docking structure. The modular docking structure includes a guiding tooth, and comprises a spiral ring, a locking ring, a steel ball bracket and a bottom cover for fixing the guiding tooth. Steel balls for locking the guiding tooth are provided on the steel ball bracket. The spiral ring is rotatably connected to the bottom cover. Both the steel ball bracket and the locking ring are slidably connected to the outer side wall of the spiral ring, and the locking ring is sleeved on the steel ball bracket. A driving component for driving the spiral ring to rotate on the bottom cover is provided on the bottom cover. When the spiral ring rotates, the steel ball bracket and the locking ring move upward or downward in the vertical direction in sequence. When the locking ring moves upward, the locking ring pushes the steel balls out to abut against the guiding tooth and limits the steel balls. When the locking ring moves downward, after the locking ring releases the restriction on the steel balls, the steel ball bracket is triggered to reset to the initial position.

[0005] Preferably, a first roller is provided on the steel ball bracket, a second roller is provided on the locking ring, a first roller groove and a second roller groove are provided on the outer side wall of the spiral ring. The first roller groove includes a first inclined section and a first horizontal section, and the first horizontal section is arranged at the top of the first inclined section. The second roller groove includes a second inclined section and a second horizontal section, and the second horizontal section is arranged at the bottom of the second inclined section. The first roller is slidably connected in the first roller groove and is located at the bottom of the first inclined section. The second roller is slidably connected in the second roller groove and is located on the second horizontal section.

[0006] Preferably, at least two fixing blocks extending downward are provided on the steel ball support, a first screw rod for fixing the first roller is provided on the fixing block, and the fixing blocks are evenly distributed on the steel ball support; at least two second screw rods for fixing the second roller are provided on the locking ring, and the second screw rods are evenly distributed on the outer side wall of the locking ring.

[0007] Preferably, a limiting ring is fixedly connected to the outer side wall of the steel ball support, the locking ring is arranged between the limiting ring and the steel ball support, a first vertical guiding mechanism is arranged between the limiting ring and the locking ring, the first vertical guiding mechanism includes a first guide wheel and a first vertical guiding groove, the first guide wheel is arranged on the limiting ring, the first vertical guiding groove is arranged on the outer side wall of the locking ring, a second vertical guiding mechanism is arranged between the steel ball support and the guiding teeth, the second vertical guiding mechanism includes a second guide wheel and a second vertical guiding groove, the second guide wheel is arranged on the outer side wall of the guiding teeth, and the second vertical guiding groove is arranged on the steel ball support.

[0008] Preferably, a groove matching with the locking ring is provided on the steel ball support, a through hole is provided on the groove, the steel ball is arranged in the through hole, a pushing block matching with the groove is provided on the locking ring, and an arc-shaped notch abutting against the steel ball is provided at the top end of the pushing block.

[0009] Preferably, the driving assembly includes a motor gear module fixedly connected to the bottom cover and an internal gear rotatably connected to the bottom cover, and the internal gear is rotatably connected to the bottom cover by the power of the motor gear module, and the spiral ring is fixedly connected to the internal gear.

[0010] Preferably, rolling elements are arranged between the internal gear and the bottom cover.

[0011] Preferably, the motor gear module includes a reduction motor, a first bracket and a cover body, the reduction motor is fixedly connected to the first bracket, the cover body is fixedly connected to the first bracket, a driving gear meshing with the internal gear is provided on the reduction motor, a first positioning roller abutting against the top end of the internal gear is provided on the cover body, and a flanging connected to the bottom cover is provided on the first bracket.

[0012] Preferably, a positioning gear module is provided on the bottom cover, the positioning gear module includes a second bracket, a gear shaft and a driven gear, thrust ball bearings are provided at both the upper and lower ends of the second bracket, the bottom end of the gear shaft passes through the thrust ball bearing and is connected to the driven gear, the top end of the gear shaft abuts against the thrust ball bearing, the driven gear is meshed and connected with the internal gear, and a second positioning roller abutting against the top end of the internal gear is provided on the second bracket.

[0013] Preferably, an outer sleeve is further provided on the bottom cover. A limiting bump is provided at the top of the outer sleeve, and a limiting boss matching with the limiting bump is provided on the outer side wall of the limiting ring.

[0014] In summary, the advantages of the present invention are as follows: By driving the spiral ring to rotate on the bottom cover through the driving assembly, since the rotation of the spiral ring drives the steel ball bracket and the locking ring to move upward or downward in sequence along the vertical direction, the hierarchical movement of the steel ball bracket and the locking ring can be realized. Moreover, it can ensure that the steel ball bracket and the locking ring move independently on the spiral ring, and there is no spatial interference between the two during the rising and falling processes, improving the stability of the hierarchical movement and solving the problem of large locking friction. Secondly, since the steel balls are arranged on the steel ball bracket, the steel balls can be ensured to be in a static state during the rising process of the locking ring, which is beneficial to the contact during the rising process of the locking ring, improving the pushing efficiency of the steel balls, and the quality of the steel balls against the guiding teeth can be ensured under the action of the locking ring. Since the locking ring always has a certain limiting function on the steel balls, the shedding or relative sliding of the steel balls can be reduced, improving the locking performance. Finally, by lowering the locking ring to release the restriction on the steel balls, the steel ball bracket is reset to the initial position under the rotation of the spiral ring, and the automatic separation function can be realized without additional power, which can be applied to the occasions that require modular docking locking and separation, especially for the electrical interfaces that require modular docking locking in satellites. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The present invention will be further described below with reference to the accompanying drawings:

[0016] Figure 1 is a schematic structural diagram of a hierarchical locking mechanism with gear transmission according to the present invention;

[0017] Figure 2 is Figure 1 exploded view of;

[0018] Figure 3 is a schematic structural diagram of the connection between the spiral ring and the steel ball bracket in the present invention;

[0019] Figure 4 is a schematic structural diagram of the connection between the spiral ring and the locking ring in the present invention;

[0020] Figure 5 is a schematic structural diagram of the driving assembly on the bottom cover in the present invention;

[0021] Figure 6 is a schematic structural diagram of the motor gear module in the present invention;

[0022] Figure 7 is a schematic structural diagram of the positioning gear module in the present invention.

[0023] Reference numerals:

[0024] 1 spiral ring, 11 first roller groove, 12 second roller groove, 2 locking ring, 21 second roller, 22 second screw, 23 arc-shaped notch, 3 steel ball bracket, 31 steel ball, 32 first roller, 33 fixing block, 34 first screw, 35 groove, 36 through hole, 4 bottom cover, 41 outer sleeve, 42 limit projection, 5 drive assembly, 51 motor gear module, 511 driving gear, 512 first positioning roller, 513 reduction motor, 514 first bracket, 515 cover body, 516 flanging, 52 internal gear, 53 rolling element, 6 limit ring, 61 limit boss, 7 first vertical guiding mechanism, 71 first guide wheel, 72 first vertical guiding groove, 8 second vertical guiding mechanism, 81 second guide wheel, 82 second vertical guiding groove, 9 positioning gear module, 91 second bracket, 92 gear shaft, 93 driven gear, 94 thrust ball bearing, 95 second positioning roller, 10 guiding tooth, 100 steel ball groove. Detailed implementation manners

[0025] As Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 、 Figure 6 and Figure 7 shown, a stepped locking mechanism with gear transmission is used for automatic locking and separation of a modular docking structure. The modular docking structure includes a guiding tooth 10 and comprises a spiral ring 1, a locking ring 2, a steel ball bracket 3 and a bottom cover 4 for fixing the guiding tooth 10. The steel ball bracket 3 is provided with steel balls 31 for locking the guiding tooth 10, and steel ball grooves 100 which are matched with the steel balls 31 can be arranged on the guiding tooth 10 to increase the contact area of the steel balls 31 and improve the locking quality. In this embodiment, the guiding tooth 10 is installed on the bottom cover 4 by screws. Specifically, threaded holes can be arranged on the guiding tooth 10, through holes 36 are arranged on the bottom cover 4, the spiral ring 1 is rotatably connected to the bottom cover 4, both the steel ball bracket 3 and the locking ring 2 are slidably connected to the outer side wall of the spiral ring 1, and the locking ring 2 is sleeved on the steel ball bracket 3. The bottom cover 4 is provided with a drive assembly 5 for driving the spiral ring 1 to rotate on the bottom cover 4. When the spiral ring 1 rotates, the steel ball bracket 3 and the locking ring 2 move upward or downward in the vertical direction in sequence. When the locking ring 2 moves upward, the locking ring 2 pushes the steel balls 31 out to abut against the guiding tooth 10 and limits the steel balls 31. When the locking ring 2 moves downward, after the locking ring 2 releases the restriction on the steel balls 31, the steel ball bracket 3 is triggered to reset to the initial position.

[0026] The driving component 5 drives the spiral ring 1 to rotate on the bottom cover 4. Since the rotation of the spiral ring 1 drives the ball bracket 3 and the locking ring 2 to move upward or downward in sequence along the vertical direction, the hierarchical movement of the ball bracket 3 and the locking ring 2 can be realized. Moreover, it can ensure that the ball bracket 3 and the locking ring 2 move independently on the spiral ring 1, and there is no spatial interference between the two during the ascending and descending processes, improving the stability of the hierarchical transmission and solving the problem of large locking friction. Secondly, since the steel balls 31 are arranged on the ball bracket 3, the steel balls 31 can be ensured to be in a static state during the ascending process of the locking ring 2, which is beneficial to the contact of the locking ring 2 during the ascending process, improving the ejection efficiency of the steel balls 31. Moreover, the quality of the steel balls 31 being in contact with the guiding teeth 10 can be ensured under the action of the locking ring 2. Since the locking ring 2 always has a certain limiting function on the steel balls 31, the falling off or relative sliding of the steel balls 31 can be reduced, improving the locking performance. Finally, the restriction on the steel balls 31 is released by the descending of the locking ring 2, and the ball bracket 3 is reset to the initial position under the rotation of the spiral ring 1. Without additional power, the function of automatic separation can be realized, and it can be applied to the occasions that require modular docking for locking and separation, especially for the electrical interfaces that require modular docking for locking in satellites.

[0027] A first roller 32 is provided on the steel ball support 3, a second roller 21 is provided on the locking ring 2, a first roller groove 11 and a second roller groove 12 are provided on the outer side wall of the spiral ring 1. The first roller groove 11 includes a first inclined section and a first horizontal section, and the first horizontal section is arranged at the top of the first inclined section. The second roller groove 12 includes a second inclined section and a second horizontal section, and the second horizontal section is arranged at the bottom of the second inclined section. The first roller 32 is slidably connected in the first roller groove 11 and is located at the bottom of the first inclined section. The second roller 21 is slidably connected in the second roller groove 12 and is located on the second horizontal section. The arrangements of the first roller groove 11 and the second roller groove 12 can realize the independent sliding of the first roller 32 and the second roller 21 on the spiral ring 1. The first roller groove 11 and the second roller groove 12 are staggeredly distributed on the spiral ring 1. Since the first roller 32 is arranged on the first inclined section of the first roller groove 11 and the second roller 21 is arranged on the second horizontal section of the second roller groove 12, when the first roller 32 drives the steel ball support 3 to move vertically upward along the first roller groove 11, the second roller 21 slides horizontally along the second horizontal section. Therefore, it is ensured that the locking ring 2 remains stationary during the rising period of the steel ball support 3. As the spiral ring 1 rotates, the first roller 32 enters the first horizontal section of the first roller groove 11, and the second roller 21 enters the second inclined section of the second roller groove 12. At this time, the steel ball support 3 stops rising, and the second roller 21 drives the locking ring 2 to move vertically upward along the second roller groove 12. After rising a certain distance, the locking ring 2 pushes the steel ball 31 into the steel ball groove 100 of the guide tooth 10, thereby realizing the sequential upward or downward movement of the steel ball support 3 and the locking ring 2 in the vertical direction, and ensuring the stability of the lifting of the steel ball support 3 and the locking ring 2.

[0028] The steel ball bracket 3 is provided with at least two downwardly extending fixing blocks 33, and the fixing blocks 33 are provided with a first screw 34 for fixing the first roller 32, and the fixing blocks 33 are evenly distributed on the steel ball bracket 3; the locking ring 2 is provided with at least two second screws 22 for fixing the second roller 21, and the second screws 22 are evenly distributed on the outer side wall of the locking ring 2, which can realize the rapid installation and fixation of the first roller 32 and the second roller 21, and can improve the fixing quality of the first roller 32 and the second roller 21, and improve the sliding effect. The fixing blocks 33 in this embodiment are provided with three, and the three fixing blocks 33 are evenly distributed on the steel ball bracket 3, and the fixing blocks 33 and the steel ball bracket 3 are integrally formed, which can improve the connection strength between the fixing blocks 33 and the steel ball bracket 3. A limiting ring 6 is fixedly connected to the outer wall of the steel ball holder 3, the locking ring 2 is arranged between the limiting ring 6 and the steel ball holder 3, and a first vertical guiding mechanism 7 is arranged between the limiting ring 6 and the locking ring 2, the first vertical guiding mechanism 7 includes a first guide wheel 71 and a first vertical guiding groove 72, the first guide wheel 71 is arranged on the limiting ring 6, and the first vertical guiding groove 72 is arranged on the outer wall of the locking ring 2. The setting of the limiting ring 6 can limit the steel ball 31 and ensure that the steel ball 31 will not fall out during the movement. The setting of the first vertical guiding mechanism 7 can ensure the stability and straightness of the steel ball holder 3 when it is raised and lowered, thereby reducing the shaking of the steel ball 31.

[0029] A second vertical guide mechanism 8 is provided between the steel ball holder 3 and the guide tooth 10, and the second vertical guide mechanism 8 includes a second guide wheel 81 and a second vertical guide groove 82. The second guide wheel 81 is arranged on the outer wall of the guide tooth 10, and the second vertical guide groove 82 is arranged on the steel ball holder 3. The second guide wheel 81 can also be arranged on the steel ball holder 3, and the second vertical guide groove 82 is arranged on the guide tooth 10, which can ensure the stability and straightness of the steel ball holder 3 when it is raised and lowered. The steel ball bracket 3 is provided with a groove 35 that matches the locking ring 2, and the groove 35 is provided with a through hole 36. The steel ball 31 is arranged in the through hole 36. The locking ring 2 is provided with a push block that matches the groove 35. The top of the push block is provided with an arc-shaped notch 23 that abuts against the steel ball. The setting of the push block and the groove 35 is conducive to the locking ring 2 to push out the steel ball 31 during the rising process. The groove 35 can play a certain limiting role on the push block, ensuring that the push block always acts on the steel ball 31 during locking, thereby improving the locking effect of the steel ball 31. The setting of the arc-shaped notch 23 can improve the contact quality between the push block and the steel ball 31, and improve the pushing quality of the steel ball 31.

[0030] The driving assembly 5 includes a motor gear module 51 fixedly connected to the bottom cover 4, and an internal gear 52 rotatably connected to the bottom cover 4. The internal gear 52 is rotatably connected to the bottom cover 4 by the power of the motor gear module 51. The spiral ring 1 is fixedly connected to the internal gear 52. The driving assembly 5 is configured as a structure of the motor gear module 51 and the internal gear 52. The power of the motor gear module 51 drives the internal gear 52 to rotate on the bottom cover 4. Since the spiral ring 1 is fixedly connected to the internal gear 52, it can drive the spiral ring 1 to rotate synchronously, with good driving effect and convenient overall installation and disassembly.

[0031] A rolling body 53 is provided between the internal gear 52 and the bottom cover 4, which can provide a certain support for the internal gear 52, thus ensuring the smooth rotation of the internal gear 52 on the bottom cover 4. The rolling body 53 in this embodiment can be a steel ball, a needle roller or other rolling bodies 53. Steel balls are preferably used in this embodiment. The motor gear module 51 includes a reduction motor 513, a first bracket 514 and a cover 515. The reduction motor 513 is fixedly connected to the first bracket 514, and the cover 515 is fixedly connected to the first bracket 514. A driving gear 511 meshing with the internal gear 52 is provided on the reduction motor 513, and a first positioning roller 512 abutting against the top end of the internal gear 52 is provided on the cover 515. The first positioning roller 512 in this embodiment is fixedly connected to the cover 515 by threads. A flanging 516 connected to the bottom cover 4 is provided on the first bracket 514. The first positioning roller 512 is fixedly connected to the cover 515 by threads. In this embodiment, the motor gear module 51 is configured as a structure of the reduction motor 513, the first bracket 514 and the cover 515, which can realize the independent installation of the driving gear 511 and the first positioning roller 512 without spatial interference. The first bracket 514 can realize the quick installation and fixation of the reduction motor 513. The flanging 516 can increase the contact area between the first bracket 514 and the bottom cover 4, improving the installation stability of the first bracket 514, thereby ensuring the meshing quality between the driving gear 511 on the reduction motor 513 and the internal gear 52. The flanging 516 in this embodiment can be fixedly connected to the bottom cover 4 by screws or by magnets. The flanging 516 and the first bracket 514 can be set as an integral structure or a split structure to meet different installation requirements. The setting of the cover 515 can play a certain protective role for the reduction motor 513 and can also realize the installation and fixation of the first positioning roller 512.

[0032] A positioning gear module 9 is provided on the bottom cover 4. The positioning gear module 9 includes a second bracket 91, a gear shaft 92, and a driven gear 93. Thrust ball bearings 94 are provided at both the upper and lower ends of the second bracket 91. The bottom end of the gear shaft 92 passes through the thrust ball bearing 94 and is connected to the driven gear 93. The top end of the gear shaft 92 abuts against the thrust ball bearing 94. The driven gear 93 is meshed and connected with the internal gear 52. A second positioning roller 95 that abuts against the top end of the internal gear 52 is provided on the second bracket 91. In this embodiment, when the driving gear 511 drives the internal gear 52 to rotate, the engagement between the driven gear 93 and the internal gear 52 can ensure the stability of the internal gear 52 during rotation and play a centering role. There are two groups of the positioning gear modules 9 in this embodiment, and the two groups of positioning gear modules 9 and the motor gear module 51 are evenly distributed on the bottom cover 4. The setting of the thrust ball bearing 94 can ensure the rotation quality of the gear shaft 92 and ensure the meshing transmission between the driven gear 93 and the internal gear 52. The setting of the second positioning roller 95 can correspond to the first positioning roller 512 to ensure the stability of the internal gear 52 during rotation. An outer sleeve 41 is further provided on the bottom cover 4. A limiting convex block 42 is provided at the top end of the outer sleeve 41. A limiting convex platform 61 that cooperates with the limiting convex block 42 is provided on the outer side wall of the limiting ring 6. The outer sleeve 41 is fixedly connected to the bottom cover 4 by countersunk head screws. Specifically, a threaded hole for cooperating with the countersunk head screws is provided at the bottom end of the outer sleeve 41, and a countersunk hole for fixing the countersunk head screws is provided on the bottom cover 4. The installation and disassembly are convenient, and there will be no spatial interference with other components, ensuring the quality of gear transmission. The outer sleeve 41 can play a protective role for other components on the bottom cover 4. The limiting convex block 42 and the limiting convex platform 61 can further limit the limiting ring 6 and can ensure the guiding function when the limiting ring 6 moves up and down, ensuring the straightness of the movement of the limiting ring 6 up and down.

[0033] Such as Figure 1 And Figure 2As shown, after the robotic arm and the flight module complete docking, they start to automatically lock. Initially, the reduction motor 513 rotates clockwise, driving the driving gear 511 to rotate. Through gear meshing, the internal gear 52 is driven to rotate. The driven gear 93 plays a centering role in the rotation of the internal gear 52, and the spiral ring 1 rotates synchronously with the internal gear 52. When locking, the spiral ring 1 rotates clockwise. When the first roller 32 drives the steel ball bracket 3 to move vertically upward along the first roller groove 11, at this time, the first guide wheel 71 plays a vertical guiding function. When the spiral ring 1 rotates to a certain angle, the first roller 32 slides into the first horizontal section of the first roller groove 11. At this time, the steel ball bracket 3 no longer moves upward with the rotation of the spiral ring 1. The steel ball bracket 3 reaches the specified position and stops rising. During the rising process of the steel ball bracket 3, the second roller 21 of the locking ring 2 slides along the second horizontal section of the second roller groove 12. Therefore, during the period when the steel ball bracket 3 rises, the locking ring 2 remains stationary. As the spiral ring 1 continues to rotate, the second roller 21 drives the locking ring 2 to move vertically upward along the second roller groove 12. After rising a certain distance, the locking ring 2 pushes out the steel ball 31 and pushes it into the steel ball groove 100 of the guiding tooth 10 to realize the limitation of the steel ball 31. The reduction motor 513 stops working, and the locking is completed. When unlocking, the reduction motor 513 rotates counterclockwise, driving the spiral ring 1 to rotate counterclockwise. Under the action of the second roller groove 12, the second roller 21 drives the locking ring 2 to move vertically downward. The locking ring 2 releases the restriction on the steel ball 31. When the spiral ring 1 rotates to a certain angle, the second roller 21 moves to the horizontal position of the second horizontal section of the second roller groove 12, and the locking ring 2 stops moving downward. As the rotating ring continues to rotate, under the action of the first roller groove 11, the first roller 32 drives the steel ball bracket 3 to move vertically downward. When the steel ball bracket 3 returns to the initial position, the unlocking is completed.

[0034] The above are only specific embodiments of the present invention, but the technical features of the present invention are not limited thereto. Any changes or modifications made by those skilled in the art within the scope of the present invention are covered by the patent scope of the present invention.

Claims

1. A stepped locking mechanism with gear transmission, which is used for the automatic locking and separation of a modular docking structure. The modular docking structure includes guide teeth, and is characterized in that: It includes a spiral ring, a locking ring, a steel ball bracket, and a bottom cover for fixing guide teeth. Steel balls for locking the guide teeth are provided on the steel ball bracket. The spiral ring is rotatably connected to the bottom cover. The steel ball bracket and the locking ring are both slidably connected to the outer side wall of the spiral ring, and the locking ring is sleeved on the steel ball bracket. A driving component for driving the spiral ring to rotate on the bottom cover is provided on the bottom cover. The rotation of the spiral ring drives the steel ball bracket and the locking ring to move upward or downward in sequence along the vertical direction. When the locking ring moves upward, the locking ring pushes the steel balls out to abut against the guide teeth and limits the steel balls. When the locking ring moves downward, after the locking ring releases the restriction on the steel balls, it triggers the steel ball bracket to reset to the initial position; A first roller is provided on the steel ball bracket, a second roller is provided on the locking ring, a first roller groove and a second roller groove are provided on the outer side wall of the spiral ring. The first roller groove includes a first inclined section and a first horizontal section. The first horizontal section is provided at the top of the first inclined section. The second roller groove includes a second inclined section and a second horizontal section. The second horizontal section is provided at the bottom of the second inclined section. The first roller is slidably connected in the first roller groove and is located at the bottom of the first inclined section. The second roller is slidably connected in the second roller groove and is located on the second horizontal section.

2. The stepwise locking mechanism with gear drive according to claim 1, wherein: At least two downward-extending fixing blocks are provided on the steel ball bracket. A first screw rod for fixing the first roller is provided on the fixing block, and the fixing blocks are evenly distributed on the steel ball bracket. At least two second screw rods for fixing the second roller are provided on the locking ring, and the second screw rods are evenly distributed on the outer side wall of the locking ring.

3. A stepped locking mechanism with gear drive according to claim 1, characterized in that: A limiting ring is fixedly connected to the outer side wall of the steel ball bracket. The locking ring is arranged between the limiting ring and the steel ball bracket. A first vertical guiding mechanism is provided between the limiting ring and the locking ring. The first vertical guiding mechanism includes a first guide wheel and a first vertical guiding groove. The first guide wheel is provided on the limiting ring, and the first vertical guiding groove is provided on the outer side wall of the locking ring. A second vertical guiding mechanism is provided between the steel ball bracket and the guide teeth. The second vertical guiding mechanism includes a second guide wheel and a second vertical guiding groove. The second guide wheel is provided on the outer side wall of the guide teeth, and the second vertical guiding groove is provided on the steel ball bracket.

4. A stepped locking mechanism with gear drive according to claim 1, characterized in that: A groove cooperating with the locking ring is provided on the steel ball bracket. A through hole is provided on the groove. The steel ball is arranged in the through hole. A pushing block cooperating with the groove is provided on the locking ring. An arc-shaped notch abutting against the steel ball is provided at the top of the pushing block.

5. A stepped locking mechanism for gear transmission according to claim 1, characterized in that: The driving component includes a motor gear module fixedly connected to the bottom cover, and an internal gear rotatably connected to the bottom cover. The internal gear is rotatably connected to the bottom cover by relying on the power of the motor gear module. The spiral ring is fixedly connected to the internal gear.

6. The hierarchical locking mechanism with gear transmission according to claim 5, characterized in that: Rolling elements are provided between the internal gear and the bottom cover.

7. A stepped locking mechanism with gear drive according to claim 5, characterized in that: The motor gear module includes a reduction motor, a first bracket, and a cover body. The reduction motor is fixedly connected to the first bracket, and the cover body is fixedly connected to the first bracket. A driving gear meshing with the internal gear is provided on the reduction motor, a first positioning roller abutting against the top end of the internal gear is provided on the cover body, and a flanging connected to the bottom cover is provided on the first bracket.

8. A step-by-step locking mechanism for gear transmission according to claim 5, characterized in that: A positioning gear module is provided on the bottom cover. The positioning gear module includes a second bracket, a gear shaft, and a driven gear. Thrust ball bearings are provided at both the upper and lower ends of the second bracket. The bottom end of the gear shaft passes through the thrust ball bearing and is connected to the driven gear, and the top end of the gear shaft abuts against the thrust ball bearing. The driven gear is meshed and connected with the internal gear, and a second positioning roller abutting against the top end of the internal gear is provided on the second bracket.

9. The hierarchical locking mechanism with gear drive according to claim 3, characterized in that: An outer sleeve is further provided on the bottom cover. A limit bump is provided at the top end of the outer sleeve, and a limit boss cooperating with the limit bump is provided on the outer side wall of the limit ring.

Images