A wheel-axle mechanism with stair climbing function

Abstract

The present application discloses a wheel axle mechanism with a stair climbing function, and relates to the technical field of wheelchairs. The present application comprises: a mounting plate, a connecting block connected to the bottom, connecting plates are arranged at intervals on both sides of the connecting block, a rod body is rotatably mounted on the connecting block, and the opposite ends of the rod body rotate through the two connecting plates respectively, and are connected to the wheel body; two circular plates are arranged on the rod body, and are respectively located on the opposite sides of the two connecting plates, and the opposite sides of the circular plates are connected to annular blocks, and the outer side of the annular block is slidably mounted with a support leg, and the support legs are distributed in an annular manner along the axis of the annular block, and the distal ends of the multiple support legs are hinged with anti-skid blocks. The present application can form an arc-shaped convex surface with a larger arc diameter by retracting the anti-skid blocks on the support legs, and realize the stair climbing function by the cooperation of the arc-shaped convex surface and the support legs. Compared with the prior art, when climbing stairs, the multiple support legs in contact with the steps are spaced smaller, and are not prone to bumps, which is more practical.

Description

Technical Field

[0001] The present application relates to the technical field of wheelchairs, and in particular to a wheel axle mechanism with a stair climbing function. Background Art

[0002] Wheelchairs are an indispensable means of transportation for the elderly, infirm and people with lower limb disabilities. With the increase of barrier-free facilities, the range of activities of wheelchair users has gradually expanded, but there are still barrier-free passages in many places, so the existence of steps greatly restricts wheelchairs.

[0003] In order to facilitate the wheelchair to move on the stairs, there are wheelchairs with stair climbing functions in the prior art, specifically, the stair climbing function is installed on the wheel body part of the wheel body. For example, the existing patent publication number CN219230431U discloses a wheel structure of a wheelchair that can climb stairs, which realizes the stair climbing function of the wheelchair by controlling a number of support rods on the circumference of the wheel to extend out of the wheel edge contour, and using the ends of the support rods to contact the ground or stairs. However, in actual use, the ends of the multiple support rods will move away from each other while extending, resulting in a large spacing. At this time, the diameter of the circular surface formed by the ends of the multiple support rods is larger than the diameter of the wheel. Although it is conducive to climbing stairs, it is easy to be bumpy during the process of climbing stairs, which is difficult to use in practice. In order to reasonably improve this problem, the present application proposes a wheel axle mechanism with stair climbing function. Summary of the invention

[0004] The purpose of the present application is to solve the problem of the wheel structure of the prior art wheelchair that can climb stairs, which realizes the stair climbing function of the wheelchair by controlling a plurality of support rods on the circumference of the wheel to extend out from the edge contour of the wheel and utilizing the ends of the support rods to contact the ground or stairs. However, in actual use, the ends of the multiple support rods will move away from each other while extending, resulting in a large spacing. At this time, the diameter of the circular surface formed by the ends of the multiple support rods is larger than the diameter of the wheel. Although this is conducive to climbing stairs, it is prone to bumps during the process of climbing stairs, making it difficult to actually apply this technical problem. The present application provides a wheel axle mechanism with a stair climbing function.

[0005] In order to achieve the above-mentioned purpose, this application specifically adopts the following technical solutions: A wheel-axle mechanism with a stair climbing function, comprising: A mounting plate, with a connecting block connected to the bottom, connecting plates spaced apart on both sides of the connecting block, a rod body rotatably mounted on the connecting block, and opposite ends of the rod body rotatably penetrate two connecting plates and are connected to a wheel body; Two circular plates are arranged on the rod body and are respectively located at the opposite sides of the two connecting plates. The opposite sides of the circular plates are connected with annular blocks. The outer sides of the annular blocks are slidably mounted with legs, and the legs are distributed in a ring along the axis of the annular blocks. The distal ends of the plurality of legs are hinged with anti-slip blocks, and the proximal ends are rotatably mounted with rollers. The connecting plates are provided with resistance plates, and the rod body movably penetrates the resistance plates. One side of the resistance plate is constructed with an arc surface, and the other side of the resistance plate is constructed with a plane. The roller rolls and overlaps with the plane. The annular blocks are provided with elastic members for driving the plurality of legs away from the resistance plates. An adjusting component is arranged on the wheel body, and the wheel body can be driven to move so as to make the legs leak out through the adjusting component; The driving assembly is arranged at the bottom of the mounting plate, and the rod body can be driven to rotate through the driving assembly.

[0006] Furthermore, the elastic member includes an elastic ring, and a plurality of mounting grooves are distributed in an annular manner on the inner side of the annular block ring and are arranged alternately with a plurality of legs. Guide wheels are rotatably installed in the mounting grooves, and the elastic rings are wound around a plurality of rollers and a plurality of guide wheels one by one, and an annular groove for accommodating the elastic ring is opened on the circumference of the roller.

[0007] Furthermore, a mounting tube is constructed on the connecting plate and is rotatably matched with the contact plate. The two contact plates are connected to each other by a connecting rod. An arc-shaped waist hole is provided on the connecting plate. The connecting rod is slidably overlapped with the inner wall of the arc-shaped waist hole. A grip rod is connected to one of the contact plates, and the contact plate is provided with a positioning mechanism to fix the position of the contact plate.

[0008] Furthermore, the positioning mechanism includes a cylindrical groove constructed on the contact plate, a plug column is slidably installed in the cylindrical groove, and the two are connected by a compression spring, the end of the plug column is constructed with a hemispherical surface, and two arc grooves are spaced apart on the inner wall of the mounting tube.

[0009] Furthermore, the driving assembly includes a motor installed at the bottom of the mounting plate, a rotating rod is rotatably installed on the connecting block, the output end of the motor is transmission-connected to the rotating rod through a sprocket mechanism, the connecting block is constructed with a through groove for accommodating the sprocket mechanism, driving gears are provided at both ends of the rotating rod, and a first driven gear meshing with the driving gears is provided on the rod body.

[0010] Furthermore, sleeves are connected to opposite sides of the circular plate, and the sleeves are rotatably installed on the rod body. The end of the sleeve is close to the first driven gear, and the second driven gear is installed thereon. The driving gears are spline-matched with the rotating rod, and a driving part is installed at the bottom of the mounting plate, through which the two driving gears can be driven to slide in opposite directions.

[0011] Furthermore, the driving part includes a spur gear rotatably mounted on a mounting plate, two sliding plates slidably fitted on the mounting plate, racks are mounted on opposite sides of the two sliding plates, and the two racks are respectively meshed with the two sides of the spur gears, an annular plate is rotatably mounted on the driving gear, and the two annular plates are respectively connected to the two sliding plates, an electric push rod is mounted on the mounting plate, and its output end is connected to one of the sliding plates.

[0012] Furthermore, the adjustment assembly includes two hinged plates, the wheel body includes a first semicircular block and a second semicircular block, the first semicircular block is connected to the end of the rod body, the second semicircular block is provided with a receiving groove for accommodating the rod body, the first semicircular block and the second semicircular block are connected to the outer sides of semicircular rings, the outer sides of the semicircular rings are connected to arc-shaped outer tires, the ends of the two semicircular rings are constructed with guide columns, the two adjacent guide columns are hinged by the hinge plate, the first semicircular block and the second semicircular block are cooperatively constructed with arc-shaped surfaces, and the second semicircular block is provided with a fixing piece for fixing the first semicircular block and the second semicircular block to each other.

[0013] Furthermore, the fixing part includes a sliding groove symmetrically arranged on the plane side of the second semicircular block, an insert block is slidably installed in the sliding groove, and the two are connected by a tension spring, a slot for accommodating the insert block is cooperated on the plane side of the first semicircular block, an electromagnet is installed in the second semicircular block, a magnetic conductive plate is provided on one side of the electromagnet, the magnetic conductive plate covers the closed ends of the two sliding grooves, and is magnetically connected to the two insert blocks.

[0014] Furthermore, an arc-shaped plate is installed on the outer side of the second semicircular block and is connected to the magnetic conductive plate, and an iron plate is installed on the outer side of the first semicircular block and is magnetically connected to the arc-shaped plate.

[0015] The beneficial effects of this application are as follows: The present application can form an arc-shaped convex surface with a larger arc diameter by retracting the anti-slip blocks on the legs, and realize the stair climbing function through the cooperation of the arc-shaped convex surface and the legs. Compared with the prior art, when climbing stairs, the distance between multiple legs in contact with the steps is smaller, bumps are less likely to occur, and it is more practical. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a three-dimensional structural diagram of this application; Figure 2 It is a structural diagram of the application in the stair climbing state; Figure 3 It is a bottom view of the local structure of this application; Figure 4 It is a front view of the partial structure of the circular plate of the present application; Figure 5 This application Figure 4 A magnified image of point A; Figure 6 This application Figure 4 The enlarged view of point B; Figure 7 It is a schematic diagram of the structure of the regulating component of the present application; 1. Mounting plate; 2. Connecting block; 3. Connecting plate; 4. Rod body; 5. Wheel body; 501. First semicircular block; 502. Second semicircular block; 503. Accommodating groove; 504. Semicircular ring; 505. Arc-shaped outer tire; 506. Guide column; 507. Connecting rod; 6. Circular plate; 7. Annular block; 8. Support leg; 9. Anti-skid block; 10. Roller; 11. Contact plate; 12. Arc surface; 13. Plane; 14. Elastic member; 1401. Elastic ring; 1402. Mounting groove; 1403. Guide wheel; 1404. Annular groove; 15. Adjustment assembly; 1501. Articulated plate; 1502. Arc surface; 1503. Fixing member; 15031. Sliding groove; 15032. Insert block; 15033. Tension spring; 15034. Insert slot; 15035, electromagnet; 15036, magnetic plate; 16, driving assembly; 1601, motor; 1602, rotating rod; 1603, sprocket mechanism; 1604, through slot; 1605, driving gear; 1606, first driven gear; 17, mounting tube; 18, connecting rod; 19, arc-shaped waist hole; 20, push rod; 21, positioning mechanism; 2101, cylindrical slot; 2102, plug column; 2103, compression spring; 2104, hemispherical surface; 2105, arc-shaped slot; 22, sleeve; 23, second driven gear; 24, driving part; 2401, spur gear; 2402, sliding plate; 2403, rack; 2404, annular plate; 2405, electric push rod; 25, arc-shaped plate; 26, iron plate; 27, curved surface. DETAILED DESCRIPTION

[0017] In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application.

[0018] like Figure 1-Figure 7 As shown, an embodiment of the present application provides a wheel axle mechanism with a stair climbing function, comprising: A mounting plate 1, on which the seat can be mounted, a connecting block 2 is connected to the bottom of the mounting plate 1, connecting plates 3 are arranged at intervals on both sides of the connecting block 2, two connecting plates 3 are respectively vertically connected to the two ends of the mounting plate 1, a rod body 4 is rotatably mounted on the connecting block 2, and opposite ends of the rod body 4 are respectively rotated to penetrate the two connecting plates 3 and are connected to a wheel body 5, and the two wheel bodies 5 are respectively located on the opposite sides of the two connecting plates 3; Two circular plates 6 are arranged on the rod body 4. The circular plates 6 are coaxial with the rod body 4 and are respectively located on the opposite sides of the two connecting plates 3. The rod body 4 can drive the circular plates 6 to rotate. The opposite sides of the circular plates 6 are connected with annular blocks 7. The outer side of the annular block 7 is slidably installed with supporting legs 8, and the supporting legs 8 are annularly distributed along the axis of the annular block 7. The far ends of the multiple supporting legs 8 are hinged with anti-skid blocks 9. After the supporting legs 8 contact the steps, as the device moves, the anti-skid blocks 9 can rotate along the hinge points and fully fit with the step surface, so as to prevent slipping. The near ends are all rotated and installed A roller 10 is installed, a contact plate 11 is provided on the connecting plate 3, the contact plate 11 is located on the inner side of the annular block 7, the rod body 4 movably penetrates the contact plate 11, a curved surface 12 is constructed on one side of the contact plate 11, and the curved surface 12 and the annular block 7 have the same center, and a plane 13 is constructed on the other side of the contact plate 11, and both ends of the plane 13 transition with the curved surface 12 through a curved surface 27, and the roller 10 rolls and overlaps with the plane 13, and an elastic member 14 is provided on the annular block 7, which is used to drive the multiple legs 8 away from the contact plate 11, and the multiple legs 8 extend out of the annular block 7 under the action of the elastic member 14, such as Figure 4 As shown, there is an acute angle between the plane 13 of the contact plate 11 and the horizontal plane 13. When climbing stairs, the step is located on the inner side of the angle between the plane 13 of the contact plate 11 and the horizontal plane 13. The supporting legs 8 and the legs 8 in contact with the steps will slide from the outer side of the annular block 7 to the inner side thereof under the action of the device's own gravity, and the rollers 10 on the retracted legs 8 will contact the contact plate 11. With the rotation of the support rod, the circular plate 6 drives the annular block 7 and the legs 8 to rotate, and the rollers 10 on the legs 8 can slide on the surface of the contact plate 11, as shown in FIG. Figure 4 As shown, the anti-slip block 9 on the retracted support leg 8 can form an arc-shaped convex surface with a larger arc diameter and convenient for passing through the steps, and the stair climbing function can be achieved by cooperating with the rotating support leg 8; The adjusting assembly 15 is arranged on the wheel body 5. The adjusting assembly 15 can drive the wheel body 5 to move so as to expose the legs 8 so as to facilitate climbing. When the ladder is used on a flat ground, the wheel body 5 can be moved on the ground so that the legs 8 and the wheel body 5 do not interfere with each other. A driving assembly 16 is disposed at the bottom of the mounting plate 1, and the rod body 4 can be driven to rotate by the driving assembly 16; The present application can form an arc-shaped convex surface with a larger arc diameter by retracting the anti-slip block 9 on the support leg 8, and realize the stair climbing function through the cooperation of the arc-shaped convex surface and the support leg 8. Compared with the prior art, when climbing stairs, the multiple support legs 8 in contact with the steps have a smaller spacing, are less likely to be bumpy, and are more practical.

[0019] like Figure 4 and Figure 5As shown, in some embodiments, the elastic member 14 includes an elastic ring 1401, which is a rubber ring. A plurality of mounting grooves 1402 are distributed in an annular manner on the inner side of the annular block 7 and are arranged alternately with the plurality of legs 8. A guide wheel 1403 is rotatably installed in each mounting groove 1402. Figure 4 As shown, the elastic rings 1401 are wound around a plurality of rollers 10 and a plurality of guide wheels 1403 one by one, and an annular groove 1404 for accommodating the elastic ring 1401 is opened on the circumference of the roller 10. With such a design, when the roller 10 abuts against the abutment plate 11 and rolls along the outer side of the abutment plate 11, the elastic rope is not easily worn. With such a design, when the support leg 8 is retracted into the annular block 7 and abuts against the abutment plate 11, the elastic ring 1401 here will be pulled to deform. At this time, the elastic ring 1401 is in a stretched state to pull the support leg 8 that has left the plane 13 back to its original position, that is, to extend out of the annular block 7.

[0020] like Figure 1 , Figure 2 , Figure 4 and Figure 6 As shown, in some embodiments, a mounting tube 17 is constructed on the connecting plate 3, and the mounting tube 17 is rotatably matched with the contact plate 11. The two contact plates 11 are connected to each other through a connecting rod 18. The two contact plates 11 are linked. An arc-shaped waist hole 19 is provided on the connecting plate 3. The connecting rod 18 slides and overlaps with the inner wall of the arc-shaped waist hole 19. A gripping rod 20 is connected to one of the contact plates 11. By pushing the gripping rod 20, one of the contact plates 11 can be driven to rotate, and the other contact plate 11 can be driven to rotate through the connecting rod 18. The contact plate 11 is provided with a positioning mechanism 21 to fix the position of the contact plate 11. When going down the stairs, the direction of the plane 13 can be adjusted by rotating the contact plate 11 to facilitate the operation of going down the stairs.

[0021] like Figure 4 and Figure 6 As shown, in some embodiments, the positioning mechanism 21 includes a cylindrical groove 2101 constructed on the contact plate 11, and a plug post 2102 is slidably installed in the cylindrical groove 2101, and the two are connected by a compression spring 2103. The compression spring 2103 is used to provide a thrust forcing the plug post 2102 to extend out of the cylindrical groove 2101. The end of the plug post 2102 is constructed with a hemispherical surface 2104, and two arc grooves 2105 are arranged on the inner wall of the mounting tube 17 at intervals. The two states of the contact plate 11 mentioned above, that is, there is an acute angle between the plane 13 and the horizontal plane 13 and the plane 13 faces the ground. When the two arc grooves 2105 are respectively aligned with the position of the plug block 15032 in the two states of the contact plate 11, when the handle 20 is pushed hard, the hemispherical surface 2104 will retract into the cylindrical groove 2101 under the interference of the arc groove 2105, and after moving to the corresponding position, it will be inserted into the other arc groove 2105 under the action of the compression spring 2103.

[0022] like Figure 1-Figure 3 As shown, in some embodiments, the driving assembly 16 includes a motor 1601 installed at the bottom of the mounting plate 1, and a rotating rod 1602 is rotatably installed on the connecting block 2. The output end of the motor 1601 is connected to the rotating rod 1602 through a sprocket mechanism 1603. The sprocket mechanism 1603 includes a sprocket coaxially installed on the output end of the motor 1601 and the rotating rod 1602, and the two sprockets are connected through a chain transmission. A through groove 1604 for accommodating the sprocket mechanism 1603 is constructed on the connecting block 2, and the through groove 1604 is located in the middle of the connecting block 2. Driving gears 1605 are provided at both ends of the rotating rod 1602, and a first driven gear 1606 meshing therewith is provided on the rod body 4. The number of the first driven gears 1606 is the same as that of the driving gears 1605. When the motor 1601 is working, the rotating rod 1602 is driven to rotate through the sprocket mechanism 1603, and the rod body 4 is driven to rotate through the mutually meshing driving gear 1605 and the first driven gear 1606.

[0023] like Figure 2 and Figure 3 As shown, in some embodiments, sleeves 22 are connected to opposite sides of the circular plate 6, and the sleeves 22 rotate to penetrate the abutment plate 11 and the connecting plate 3, and the sleeves 22 are rotatably mounted on the rod body 4, and the end of the sleeve 22 is close to the first driven gear 1606, and a second driven gear 23 is mounted thereon, and the second driven gear 23 and the first driven gear 1606 are consistent in shape and size, and the driving gear 1605 can also mesh with it, and the driving gears 1605 are splined with the rotating rod 1602, and a driving part 24 is installed at the bottom of the mounting plate 1, and the two driving gears 1605 can be driven to slide in opposite directions through the driving part 24, and the second driven gear 23 is connected to the first driven gear 1606. When 1605 is in the first position, it meshes with the first driven gear 1606, which can drive the rod body 4 to rotate and can be moved by the wheel body 5. When the two driving gears 1605 are driven to move in opposite directions by the driving part 24, the driving gear 1605 can be disengaged from the first driven gear 1606 and meshed with the second driven gear 23. This is the second position of the driving gear 1605, which can drive the two sleeves 22 to rotate synchronously. This design separates the circular plate 6 from the wheel body 5, that is, when moving by the wheel body 5, the circular plate 6 will not rotate, and when climbing stairs, the wheel body 5 will not move, so that the two are not prone to motion interference.

[0024] like Figure 3As shown, in some embodiments, the driving part 24 includes a spur gear 2401 rotatably mounted on the mounting plate 1, and two sliding plates 2402 are slidably matched on the mounting plate 1, and the sliding directions of the two sliding plates 2402 are parallel to each other. Racks 2403 are installed on opposite sides of the two sliding plates 2402, and the two racks 2403 are respectively meshed with the two sides of the spur gear 2401, and an annular plate 2404 is rotatably mounted on the driving gear 1605, and the two annular plates 2404 are respectively connected to the two sliding plates 2402, and an electric push rod 2405 is installed on the mounting plate 1, and its output end is connected to one of the sliding plates 2402. When the electric push rod 2405 is extended, it can push one of the sliding plates 2402 to slide and drive the spur gear 2401 to rotate, thereby driving the other sliding plate 2402 to slide backwards. At this time, the two driving gears 1605 can move backwards with the two annular plates 2404.

[0025] like Figure 1 and Figure 7 As shown, in some embodiments, the adjustment assembly 15 includes two hinged plates 1501, which are rectangular, and the wheel body 5 includes a first semicircular block 501 and a second semicircular block 502. The first semicircular block 501 is connected to the end of the rod body 4, and the second semicircular block 502 is provided with a receiving groove 503 for accommodating the rod body 4. The first semicircular block 501 and the second semicircular block 502 are both connected to a semicircular ring 504 on the outside, and the two are connected to each other through a connecting rod 507. The semicircular ring 504 is connected to the outside of the connecting rod 507. There is an arc-shaped outer tire 505, which is made of rubber material. The ends of the two semicircular rings 504 are both constructed with guide pillars 506. The two adjacent guide pillars 506 are hinged through a hinge plate 1501. The two guide pillars 506 are respectively hinged to the two ends of the hinge plate 1501. The first semicircular block 501 and the second semicircular block 502 are matched with arc surfaces 1502. The second semicircular block 502 is provided with a fixing piece 1503 for connecting the first semicircular block 501 with the second semicircular block 502. The semicircular blocks 502 are fixed to each other. After the plane 13 sides of the first semicircular block 501 and the second semicircular block 502 are fitted together, the two can be fixed by the fixing piece 1503. At this time, the two can form a complete circle, and the two semicircular rings 504 and the two arc-shaped outer tires 505 can form a circular wheel. At this time, it can be moved by the wheel body 5. When climbing stairs, the second semicircular block 502 can be rotated to the top of the first semicircular block 501, and then the fixing of the first semicircular block 501 and the second semicircular block 502 can be released by the fixing piece 1503. Then, the second semicircular block 502 and the semicircular ring 504 connected thereto can be rotated by the hinge plate 1501 and rotated to be parallel to the first semicircular block 501. Subsequently, the wheel body 5 can be driven to rotate to rotate the first semicircular block 501 and the second semicircular block 502 to the top, and contact the ground through the extended legs 8. Finally, the driving part 24 can switch the rotation of the rod body 4 to the sleeve rotation and climb the stairs.

[0026] like Figure 7 As shown, in some embodiments, the fixing member 1503 includes a sliding groove 15031 symmetrically arranged on the side of the plane 13 of the second semicircular block 502, and an insert block 15032 is slidably installed in the sliding groove 15031, and the two are connected by a tension spring 15033. Under the action of the tension spring 15033, the insert block 15032 extends out of the sliding groove 15031, and a slot 15034 for accommodating the insert block 15032 is provided on the side of the plane 13 of the first semicircular block 501. When the insert block 15032 extends out of the sliding groove 15031 and is inserted into the slot 15034, the first semicircular block 50 1 is fixed with the second semicircular block 502, an electromagnet 15035 is installed in the second semicircular block 502, a magnetic conductive plate 15036 is provided on one side of the electromagnet 15035, the magnetic conductive plate 15036 is a silicon steel plate, the magnetic conductive plate 15036 covers the closed ends of the two sliding grooves 15031, and is magnetically connected with the two plug-in blocks 15032. When the electromagnet 15035 is energized, a magnetic force can be given to the magnetic conductive plate 15036, and at this time, the two plug-in blocks 15032 are retracted into the sliding groove 15031 under the adsorption of the magnetic conductive plate 15036, so that the first semicircular block 501 and the second semicircular block 502 can be contacted and fixed.

[0027] like Figure 7 As shown, in some embodiments, an arc plate 25 is installed on the outer side of the second semicircular block 502. The arc plate 25 is made of the same material as the magnetic plate 15036 and is connected to the magnetic plate 15036. When the electromagnet 15035 is turned on, it can give magnetic force to the arc plate 25. An iron plate 26 is installed on the outer side of the first semicircular block 501 and is magnetically connected to the arc plate 25. After the two first semicircular blocks 501 and the second semicircular block 502 are rotated to be parallel to each other, the iron plate 26 can be adsorbed by the arc plate 25 to prevent the second semicircular block 502 from rotating during the stair climbing process.

[0028] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A wheel-axle mechanism with stair climbing function, characterized in that: include: A mounting plate (1) is connected to a connecting block (2) at the bottom, connecting plates (3) are provided at intervals on both sides of the connecting block (2), a rod body (4) is rotatably mounted on the connecting block (2), and opposite ends of the rod body (4) are respectively rotatably passed through the two connecting plates (3) and are connected to a wheel body (5); Two circular plates (6) are arranged on the rod body (4) and are respectively located on opposite sides of the two connecting plates (3). The opposite sides of the circular plates (6) are connected to annular blocks (7). The outer side of the annular block (7) is slidably mounted with a support leg (8), and a plurality of the support legs (8) are distributed in an annular manner along the axis of the annular block (7). The distal ends of the plurality of support legs (8) are hinged with an anti-slip block (9), and the proximal ends thereof are rotatably mounted with a roller (10). The connecting plate (3) is provided with a contact plate (11), the rod body (4) movably penetrates the contact plate (11), one side of the contact plate (11) is constructed with an arc surface (12), and the other side of the contact plate (11) is constructed with a plane (13), the roller (10) and the plane (13) are rollingly overlapped, and the annular block (7) is provided with an elastic member (14) for driving the plurality of support legs (8) away from the contact plate (11); An adjusting component (15) is arranged on the wheel body (5), and the adjusting component (15) can drive the wheel body (5) to move so as to allow the supporting legs (8) to leak out; A driving assembly (16) is arranged at the bottom of the mounting plate (1), and the rod body (4) can be driven to rotate via the driving assembly (16).

2. The wheel-axle mechanism with stair climbing function according to claim 1, characterized in that: The elastic member (14) comprises an elastic ring (1401), a plurality of mounting grooves (1402) are distributed in an annular manner on the inner side of the annular block (7), and are arranged alternately with the plurality of legs (8), guide wheels (1403) are rotatably mounted in the mounting grooves (1402), the elastic rings (1401) are wound around the plurality of rollers (10) and the plurality of guide wheels (1403) one by one, and an annular groove (1404) for accommodating the elastic ring (1401) is provided on the circumference of the roller (10).

3. The wheel-axle mechanism with stair climbing function according to claim 2, characterized in that: The connecting plate (3) is provided with a mounting tube (17) which is rotatably matched with the contact plate (11); the two contact plates (11) are connected to each other via a connecting rod (18); an arc-shaped waist hole (19) is provided on the connecting plate (3); the connecting rod (18) is slidably overlapped with the inner wall of the arc-shaped waist hole (19); a gripping rod (20) is connected to one of the contact plates (11); and the contact plate (11) is provided with a positioning mechanism (21) to fix the position of the contact plate (11).

4. The wheel-axle mechanism with stair climbing function according to claim 3, characterized in that: The positioning mechanism (21) comprises a cylindrical groove (2101) constructed on the contact plate (11), a plug post (2102) is slidably installed in the cylindrical groove (2101), and the two are connected by a compression spring (2103), the end of the plug post (2102) is constructed with a hemispherical surface (2104), and the inner wall of the mounting tube (17) is provided with two arc grooves (2105) spaced apart from each other.

5. The wheel-axle mechanism with stair climbing function according to claim 1, characterized in that: The driving assembly (16) comprises a motor (1601) mounted on the bottom of the mounting plate (1); a rotating rod (1602) is rotatably mounted on the connecting block (2); an output end of the motor (1601) is transmission-connected to the rotating rod (1602) via a sprocket mechanism (1603); a through slot (1604) for accommodating the sprocket mechanism (1603) is constructed on the connecting block (2); driving gears (1605) are provided at both ends of the rotating rod (1602); and a first driven gear (1606) meshing with the driving gears is provided on the rod body (4).

6. The wheel-axle mechanism with stair climbing function according to claim 5, characterized in that: The opposite sides of the circular plate (6) are connected with sleeves (22), and the sleeves (22) are rotatably mounted on the rod body (4). The end of the sleeve (22) is close to the first driven gear (1606), and the second driven gear (23) is mounted thereon. The driving gears (1605) are spline-matched with the rotating rod (1602). A driving part (24) is mounted at the bottom of the mounting plate (1), and the two driving gears (1605) can be driven to slide in opposite directions through the driving part (24).

7. The wheel-axle mechanism with stair climbing function according to claim 6, characterized in that: The driving part (24) comprises a spur gear (2401) rotatably mounted on a mounting plate (1); two sliding plates (2402) are slidably fitted on the mounting plate (1); racks (2403) are mounted on opposite sides of the two sliding plates (2402), and the two racks (2403) are respectively meshed with two sides of the spur gear (2401); an annular plate (2404) is rotatably mounted on the driving gear (1605), and the two annular plates (2404) are respectively connected to the two sliding plates (2402); an electric push rod (2405) is mounted on the mounting plate (1), and its output end is connected to one of the sliding plates (2402).

8. The wheel-axle mechanism with stair climbing function according to claim 7, characterized in that: The adjustment assembly (15) comprises two hinged plates (1501); the wheel body (5) comprises a first semicircular block (501) and a second semicircular block (502); the first semicircular block (501) is connected to the end of the rod body (4); the second semicircular block (502) is provided with a receiving groove (503) for receiving the rod body (4); the first semicircular block (501) and the second semicircular block (502) are both connected to the outer sides with semicircular rings (504); the semicircular rings (504) are The outer sides are connected to arc-shaped outer tires (505), the ends of the two semicircular rings (504) are each constructed with guide pillars (506), and two adjacent guide pillars (506) are hingedly connected through a hinge plate (1501), and the first semicircular block (501) and the second semicircular block (502) are matched with arc-shaped surfaces (1502), and the second semicircular block (502) is provided with a fixing piece (1503) for fixing the first semicircular block (501) and the second semicircular block (502) to each other.

9. The wheel-axle mechanism with stair climbing function according to claim 8, characterized in that: The fixing member (1503) comprises a sliding groove (15031) symmetrically arranged on the side of the plane (13) of the second semicircular block (502); an insert block (15032) is slidably installed in the sliding groove (15031), and the two are connected by a tension spring (15033); a slot (15034) for accommodating the insert block (15032) is provided on the side of the plane (13) of the first semicircular block (501); an electromagnet (15035) is installed in the second semicircular block (502); a magnetic conductive plate (15036) is provided on one side of the electromagnet (15035); the magnetic conductive plate (15036) covers the closed ends of the two sliding grooves (15031) and is magnetically connected to the two insert blocks (15032).

10. The wheel-axle mechanism with stair climbing function according to claim 9, characterized in that: An arc-shaped plate (25) is installed on the outer side of the second semicircular block (502) and is connected to the magnetic conductive plate (15036); an iron plate (26) is installed on the outer side of the first semicircular block (501) and is magnetically connected to the arc-shaped plate (25).

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