A non-pneumatic wheel with variable wheel diameter and tire width

Abstract

This invention discloses a non-pneumatic wheel with variable wheel diameter and tire width, comprising a tread, a hub, a telescopic module, a drive module, and a locking module. The tread has M telescopic through holes evenly distributed circumferentially. The hub is coaxially disposed within the tread and has M evenly distributed grooves pointing towards its center. The telescopic module includes M telescopic units corresponding one-to-one with the grooves, each telescopic unit comprising a slider, a drive roller, a limit roller, a support body, a return spring, and first to fourth connecting members. The drive module includes a servo motor, a central bearing, a central shaft, a drive disc, and M drive spokes. The locking module includes M locking units, each corresponding to a lock unit on the inner wall of the tread between the M telescopic units. This invention reduces tire width while changing the wheel diameter and can lock through the cooperation of the drive module and the locking module, resulting in good driving stability, strong functionality, and compatibility with various vehicles.

Description

Technical Field

[0001] This invention relates to the automotive field, and more particularly to a non-pneumatic wheel with variable wheel diameter and tire width. Background Technology

[0002] Tires are the only component that interacts with the road and the vehicle. They respond to the driver's dynamic commands and support the vehicle's weight, thereby reducing bumps and various complex stimuli on rough roads and improving driving comfort. Currently, pneumatic tires remain the mainstream in the tire industry, but their drawbacks are also obvious, such as poor puncture resistance, inability to drive normally after a leak, and the risk of tire blowout. Therefore, researchers have gradually explored new research directions, leading to the development of non-pneumatic tires. Non-pneumatic tires lack the complex structures of pneumatic tires, such as the airtight layer and belt layer, simplifying the structure and reducing the efficiency of leaks and blowouts, greatly improving vehicle driving safety. However, despite their many advantages, non-pneumatic tires still have limitations when facing various complex road conditions such as potholes, mountain roads, and muddy or waterlogged surfaces.

[0003] On a non-pneumatic basis, wheels with variable diameter and tread width are suitable for different road surfaces. When driving on uneven roads, the variable diameter wheels are in an open state, increasing the distance between the car chassis and the ground and reducing the contact area between the tire and the ground, thus improving the car's passability and ride comfort. When driving on a flat and smooth road, the wheels are in an closed state, increasing the car's speed.

[0004] Current research on changing wheel diameter and tire width is relatively limited. Chinese patent document CN110356167B discloses a variable-diameter deformable wheel, which can change its diameter according to different driving scenarios. However, this technical solution cannot change the axial width of the wheel; increasing the wheel diameter would worsen the ride comfort, and the components are relatively complex, making installation and disassembly difficult. Currently, few studies on variable-radius wheels combine the tire's variable radius with mechanical locking devices; most rely on electrically powered devices such as electromagnetic hydraulic valves for control, resulting in high energy consumption. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to address the deficiencies mentioned in the background art by providing a non-pneumatic wheel with variable wheel diameter and tire width.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0007] A non-pneumatic wheel with variable wheel diameter and tire width, comprising a tread, a hub, a telescopic module, a drive module, and a locking module;

[0008] The hub is disc-shaped with a through hole in the center for the input shaft to pass through, and M strip-shaped grooves pointing to its center are evenly distributed around its circumference, where M is a natural number greater than or equal to 3.

[0009] The tread is a hollow cylinder with openings at both ends, and M telescopic through holes are evenly provided on its circumference.

[0010] The wheel hub is coaxially arranged inside the tire tread, and the outer edge of the wheel hub is fixedly connected to the tire tread, so that the centers of the M strip-shaped through grooves and the M telescopic through holes correspond one-to-one;

[0011] The telescopic module comprises M telescopic units;

[0012] The telescopic unit includes a slider, a roller bracket, a first drive roller, a second drive roller, a first limit roller, a second limit roller, a support body, a support bracket, a reset spring, and first to fourth connecting parts. M telescopic units and M strip slots are arranged in a one-to-one correspondence.

[0013] The slider is set in the corresponding strip groove of the telescopic unit and can slide freely along it;

[0014] The reset spring is set in the strip-shaped groove, with one end fixedly connected to the hub inside the strip-shaped groove and the other end fixedly connected to the slider, and is in a stretched state;

[0015] The first drive roller, the first limiting roller, the second limiting roller, and the second drive roller are coplanar, and their rotating shafts are all parallel to the hub axis. Both ends of the rotating shafts are fixed on the roller brackets, and the rotating shafts are sequentially arranged on a circle whose center is located on the hub axis. The first drive roller and the second drive roller are symmetrically arranged, as are the first limiting roller and the second limiting roller.

[0016] The shape of the support body is the same as that of the telescopic through hole. Its outer wall is an arc-shaped side wall with the same curvature as the tire tread, and the center of the inner wall is fixedly connected to the support bracket and the roller bracket.

[0017] The roller bracket and the slider are fixedly connected, so that when the slider slides outward, the support body moves outward relative to the tire tread, and when the slider slides inward, the support body can cooperate with its corresponding telescopic through hole to align the support body and the outer wall surface of the tire body.

[0018] All of the first to fourth connecting members are plate-shaped. The first and second connecting members are located on one side of the support bracket, and the third and fourth connecting members are located on the other side of the support bracket. The first and fourth connecting members have the same structure, and the second and third connecting members have the same structure. One end of the first connecting member is hinged to the inner wall of the tread on one side of the telescopic through hole of the telescopic unit, and the other end is hinged to one end of the second connecting member. The other end of the second connecting member is hinged to the inner wall of the support member. One end of the third connecting member is hinged to the inner wall of the support member, and the other end is hinged to one end of the fourth connecting member. The other end of the fourth connecting member is hinged to the inner wall of the tread on the other side of the telescopic through hole of the telescopic unit. The first and fourth connecting members are provided with through holes for engaging the locking module, and the second and third connecting members are provided with limiting holes for engaging the locking module. The first and fourth connecting members are symmetrically arranged, and the second and third connecting members are symmetrically arranged.

[0019] The drive module includes a servo motor, a central bearing, a central shaft, a drive disk, and M drive wheel spokes;

[0020] The central bearing is disposed in the through hole at the center of the hub, the outer ring is coaxially and fixedly connected to the hub, and the inner ring is coaxially and fixedly connected to the central shaft.

[0021] The servo motor is fixed on the hub, and its output shaft is coaxially and fixedly connected to the central shaft.

[0022] The drive disk has a through hole in the center for the central shaft to pass through, and is fitted onto the central shaft and coaxially fixed to the central shaft;

[0023] The M drive spokes are evenly arranged circumferentially on the drive disk; the root of the drive spoke is fixed to the drive disk and includes first to fourth sidewalls connected end to end in sequence, wherein the first and third sidewalls are outwardly convex arc surfaces, the second and fourth sidewalls are planes and perpendicular to the central axis, the first and third sidewalls are symmetrical and the tip of the drive spoke is rounded at the junction of the first and third sidewalls;

[0024] The locking module comprises M locking units;

[0025] The M locking units are arranged one-to-one on the inner wall of the tire tread between the M telescopic units, and each includes a housing, a limiting ball, a transmission column, a first partition, a second partition, a preload spring, a pressure plate, a first limiting rod, a second limiting rod, a first pivot rod, a second pivot rod, and a first to a fourth magnet.

[0026] The shell is a cylinder with a cylindrical cavity coaxial with it; the upper end face of the shell has a through hole with a diameter smaller than that of the limiting ball at its center; the side wall of the shell has a first limiting through hole and a second limiting through hole that communicate with its inner cavity.

[0027] Both the first and second partitions are circular, and each has a through hole in its center that mates with the conductive column. The conductive column is disposed in a cavity within the housing. The first partition is sleeved around the conductive column and is coaxially fixed to it. The second partition is disposed below the first partition and is coaxially fixed to the inner wall of the housing. The upper end of the conductive column is fixed to the limiting ball, and its axis passes through the center of the limiting ball. The lower end of the conductive column passes through the through hole in the center of the second partition and is perpendicularly fixed to the pressure plate. The diameter of the through hole in the center of the second partition is larger than the diameter of the cross-section of the conductive column.

[0028] The preload spring is disposed between the first partition and the second partition, with one end abutting against the first partition and the other end abutting against the second partition, and is in a compressed state, so that the limiting ball abuts against the through hole at the center of the upper end face of the housing, and a portion of it is exposed outside the housing;

[0029] The first limiting rod and the second limiting rod have the same structure, both are L-shaped, and both include a long rod and a short rod. One end of the short rod and one end of the long rod are vertically fixedly connected, and the end of the long rod away from the short rod is provided with a pivot hole at a preset distance threshold.

[0030] The first limiting rod has its long end, away from the short end, extending into the cavity inside the housing through the first limiting through hole. At its long rod pivot hole, it is pivotally connected to the inner wall of the housing via the first pivot rod, allowing the short end to face upwards and the long end to rotate freely around the first pivot rod within the limiting through hole. The second limiting rod has its long end, away from the short end, extending into the cavity inside the housing through the second limiting through hole. At its long rod pivot hole, it is pivotally connected to the inner wall of the housing via the second pivot rod, allowing the short end to face upwards and the long end to rotate freely around the second pivot rod within the limiting through hole.

[0031] The first magnet is disposed on the lower wall inside the first pivot rod of the first limiting rod; the second magnet is disposed on the lower wall inside the second pivot rod of the second limiting rod; the third magnet is disposed inside the housing, opposite to the first magnet and repelling the first magnet; the fourth magnet is disposed inside the housing, opposite to the second magnet and repelling the second magnet.

[0032] When the limiting ball is pressed down, the pressure plate presses the inner side of the long rods of the first and second limiting rods, causing the short rods of the first and second limiting rods to move upward; when the limiting ball is released, the return spring, through the conduction column, causes the limiting ball to abut against the through hole at the center of the upper end face of the housing, and the pressure plate releases the first and second limiting rods. Under the action of the first to fourth magnets, the short rods of the first and second limiting rods move downward.

[0033] When the wheel diameter and tire width of the non-pneumatic wheel remain unchanged, the supports of the M telescopic units are aligned with the outer wall surface of the tire body. At this time, the roller brackets of the M telescopic units are located between the M drive spokes. The first drive roller and the second drive roller of each telescopic unit abut against the arc-shaped sidewalls of the drive spokes on both sides. The tips of the M drive spokes abut against and press down the limiting balls of the M locking units, so that the long rod of the first limiting rod of the locking unit passes through the through hole of the fourth connector of the telescopic unit on one side of the locking unit and locks the limiting hole of the third connecting rod of the telescopic unit on that side through the short rod of the first limiting rod. The long rod of the second limiting rod of the locking unit passes through the through hole of the first connector of the telescopic unit on the other side of the locking unit and locks the limiting hole of the second connecting rod of the telescopic unit on that side through the short rod of the second limiting rod.

[0034] When the diameter and width of the non-pneumatic wheel change, the servo motor causes the drive disc to rotate, the limiting balls of the M locking units are released by the M drive wheel spokes, and the second and third connecting rods of the M telescopic units are unlocked; at the same time, the M telescopic units move outward under the pressure of the M drive wheel spokes on their first and second drive rollers, and the support body is pushed outward until the tips of the M drive wheel spokes abut against the first and second limiting rollers of the M telescopic units.

[0035] As a further optimization of the non-pneumatic wheel with variable wheel diameter and tire width according to the present invention, the servo motor is a DC brushless motor.

[0036] As a further optimization of the non-pneumatic wheel with variable wheel diameter and tire width according to the present invention, the wheel hub is made of alloy steel.

[0037] As a further optimization of the non-pneumatic wheel with variable wheel diameter and tire width according to the present invention, M is set to 6.

[0038] As a further optimization of the non-pneumatic wheel with variable wheel diameter and tire width according to the present invention, the wheel hub is hollowed out to reduce wheel weight distribution and component wear.

[0039] As a further optimization of the non-pneumatic wheel with variable wheel diameter and tire width of the present invention, both the tread and the support body are made of aluminum material, and both have a polyurethane layer on the outer wall, which is bonded together with HY-308 cold adhesive.

[0040] As a further optimization of the non-pneumatic wheel with variable wheel diameter and tire width according to the present invention, the locking unit also includes a fifth magnet and a sixth magnet;

[0041] The fifth magnet is disposed inside the housing, below the long rod of the first limiting rod outside the first pivot rod;

[0042] The sixth magnet is disposed inside the housing, below the long rod of the second limiting rod outside the second pivot rod;

[0043] The long rods of both the first and second limiting rods are made of magnetic material.

[0044] Compared with the prior art, the present invention, employing the above technical solution, has the following technical effects:

[0045] 1. This invention includes an elastic tread, a wheel hub, a telescopic module, a drive module, and a locking module. When the vehicle is traveling on a good road surface, the wheel diameter and tire width of the non-pneumatic wheel remain unchanged. The supports of the M telescopic units are aligned with the outer wall surface of the tire body. At this time, the roller brackets of the M telescopic units are located between the M drive spokes. The first drive roller and the second drive roller of each telescopic unit abut against the arc-shaped sidewalls of the drive spokes on both sides. The tips of the M drive spokes abut against and press down the limiting balls of the M locking units, so that the long rod of the first limiting rod of the locking unit passes through the through hole of the fourth connector of the telescopic unit on one side of the locking unit and locks the limiting hole of the third connector of the telescopic unit on that side through the short rod of the first limiting rod. The long rod of the second limiting rod of the locking unit passes through the through hole of the first connector of the telescopic unit on the other side of the locking unit and locks the limiting hole of the second connector of the telescopic unit on that side through the short rod of the second limiting rod. The telescopic module is locked by the locking module, and the vehicle can quickly pass through the good road surface.

[0046] 2. When the car is driving on rough roads, the wheel diameter and tire width of the non-pneumatic wheels change. The servo motor causes the drive disc to rotate, and the limiting balls of the M locking units are released by the M drive wheel spokes, unlocking the second and third connecting rods of the M telescopic units. At the same time, the M telescopic units move outward under the pressure of the M drive wheel spokes on their first and second drive rollers, and the support body expands outward until the tips of the M drive wheel spokes abut against the first and second limiting rollers of the M telescopic units. The wheels rotate with a larger radius and a narrower tread, greatly improving the car's passability and environmental adaptability.

[0047] 3. The wheel hub of the present invention adopts a hollow design, which not only reduces the weight of the wheel, but also provides good support.

[0048] 4. The outer wall of the tire tread of the present invention is provided with a polyurethane layer, which has better stability, resilience and mechanical properties, and the processing method is simple and pollution-free.

[0049] 5. The telescopic modules described in this invention are preferably 6 in number, and the central angle corresponding to the support body is 45°, which makes the grounding smoother and improves the riding comfort.

[0050] 6. The present invention has a simple and compact overall structure, is easy to assemble, maintain and repair, and has good heat dissipation. Attached Figure Description

[0051] Figure 1 This is a schematic diagram of the structure of the present invention in its normal state;

[0052] Figure 2 This is a schematic diagram of the structure of the present invention in the variable radius state;

[0053] Figure 3 This is an exploded view of the structure of the present invention;

[0054] Figure 4 This is a schematic diagram of the hub structure of the present invention;

[0055] Figure 5 This is a schematic diagram of the telescopic module structure of the present invention;

[0056] Figure 6 This is a cross-sectional view of the locking unit of the present invention.

[0057] In the diagram, 1-tread, 2-drive disc, 3-drive wheel spoke, 4-central shaft, 5-support bracket, 6-roller bracket, 7-first limiting rod, 8-housing, 9-second limiting rod, 10-second connecting piece, 11-first connecting piece, 12-fourth connecting piece, 13-third connecting piece, 14-hub, 15-support body, 16-servo motor, 17-central bearing, 18-slider, 19-first drive roller, 20-first limiting roller, 21-second limiting roller, 22-second drive roller, 23-limiting ball, 24-transmission column, 25-first partition, 26-second partition, 27-pressure plate, 28-first pivot rod, 29-first magnet, 30-fifth magnet, 31-third magnet, 32-fourth magnet, 33-sixth magnet, 34-second pivot rod, 35-second magnet, 36-preload spring. Implementation

[0058] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings:

[0059] This invention can be implemented in many different forms and should not be considered limited to the embodiments described herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully express the scope of the invention to those skilled in the art. In the drawings, components are enlarged for clarity.

[0060] It should be understood that although the terms first, second, third, etc., may be used herein to describe various elements, components, and / or parts, these elements, components, and / or parts are not limited by these terms. These terms are merely used to distinguish elements, components, and / or parts from one another. Therefore, the first element, component, and / or part discussed below may be a second element, component, or part without departing from the teachings of this invention.

[0061] A non-pneumatic wheel with variable wheel diameter and tire width, comprising a tread, a hub, a telescopic module, a drive module, and a locking module;

[0062] The hub is disc-shaped with a through hole in the center for the input shaft to pass through, and M strip-shaped grooves pointing to its center are evenly distributed around its circumference, where M is a natural number greater than or equal to 3.

[0063] The tread is a hollow cylinder with openings at both ends, and M telescopic through holes are evenly provided on its circumference.

[0064] The wheel hub is coaxially arranged inside the tire tread, and the outer edge of the wheel hub is fixedly connected to the tire tread, so that the centers of the M strip-shaped through grooves and the M telescopic through holes correspond one-to-one;

[0065] The telescopic module comprises M telescopic units;

[0066] The telescopic unit includes a slider, a roller bracket, a first drive roller, a second drive roller, a first limit roller, a second limit roller, a support body, a support bracket, a reset spring, and first to fourth connecting parts. M telescopic units and M strip slots are arranged in a one-to-one correspondence.

[0067] The slider is set in the corresponding strip groove of the telescopic unit and can slide freely along it;

[0068] The reset spring is set in the strip-shaped groove, with one end fixedly connected to the hub inside the strip-shaped groove and the other end fixedly connected to the slider, and is in a stretched state;

[0069] The first drive roller, the first limiting roller, the second limiting roller, and the second drive roller are coplanar, and their rotating shafts are all parallel to the hub axis. Both ends of the rotating shafts are fixed on the roller brackets, and the rotating shafts are sequentially arranged on a circle whose center is located on the hub axis. The first drive roller and the second drive roller are symmetrically arranged, as are the first limiting roller and the second limiting roller.

[0070] The shape of the support body is the same as that of the telescopic through hole. Its outer wall is an arc-shaped side wall with the same curvature as the tire tread, and the center of the inner wall is fixedly connected to the support bracket and the roller bracket.

[0071] The roller bracket and the slider are fixedly connected, so that when the slider slides outward, the support body moves outward relative to the tire tread, and when the slider slides inward, the support body can cooperate with its corresponding telescopic through hole to align the support body and the outer wall surface of the tire body.

[0072] All of the first to fourth connecting members are plate-shaped. The first and second connecting members are located on one side of the support bracket, and the third and fourth connecting members are located on the other side of the support bracket. The first and fourth connecting members have the same structure, and the second and third connecting members have the same structure. One end of the first connecting member is hinged to the inner wall of the tread on one side of the telescopic through hole of the telescopic unit, and the other end is hinged to one end of the second connecting member. The other end of the second connecting member is hinged to the inner wall of the support member. One end of the third connecting member is hinged to the inner wall of the support member, and the other end is hinged to one end of the fourth connecting member. The other end of the fourth connecting member is hinged to the inner wall of the tread on the other side of the telescopic through hole of the telescopic unit. The first and fourth connecting members are provided with through holes for engaging the locking module, and the second and third connecting members are provided with limiting holes for engaging the locking module. The first and fourth connecting members are symmetrically arranged, and the second and third connecting members are symmetrically arranged.

[0073] The drive module includes a servo motor, a central bearing, a central shaft, a drive disk, and M drive wheel spokes;

[0074] The central bearing is disposed in the through hole at the center of the hub, the outer ring is coaxially and fixedly connected to the hub, and the inner ring is coaxially and fixedly connected to the central shaft.

[0075] The servo motor is fixed on the hub, and its output shaft is coaxially and fixedly connected to the central shaft.

[0076] The drive disk has a through hole in the center for the central shaft to pass through, and is fitted onto the central shaft and coaxially fixed to the central shaft;

[0077] The M drive spokes are evenly arranged circumferentially on the drive disk; the root of the drive spoke is fixed to the drive disk and includes first to fourth sidewalls connected end to end in sequence, wherein the first and third sidewalls are outwardly convex arc surfaces, the second and fourth sidewalls are planes and perpendicular to the central axis, the first and third sidewalls are symmetrical and the tip of the drive spoke is rounded at the junction of the first and third sidewalls;

[0078] The locking module comprises M locking units;

[0079] The M locking units are arranged one-to-one on the inner wall of the tire tread between the M telescopic units, and each includes a housing, a limiting ball, a transmission column, a first partition, a second partition, a preload spring, a pressure plate, a first limiting rod, a second limiting rod, a first pivot rod, a second pivot rod, and a first to a fourth magnet.

[0080] The shell is a cylinder with a cylindrical cavity coaxial with it; the upper end face of the shell has a through hole with a diameter smaller than that of the limiting ball at its center; the side wall of the shell has a first limiting through hole and a second limiting through hole that communicate with its inner cavity.

[0081] Both the first and second partitions are circular, and each has a through hole in its center that mates with the conductive column. The conductive column is disposed in a cavity within the housing. The first partition is sleeved around the conductive column and is coaxially fixed to it. The second partition is disposed below the first partition and is coaxially fixed to the inner wall of the housing. The upper end of the conductive column is fixed to the limiting ball, and its axis passes through the center of the limiting ball. The lower end of the conductive column passes through the through hole in the center of the second partition and is perpendicularly fixed to the pressure plate. The diameter of the through hole in the center of the second partition is larger than the diameter of the cross-section of the conductive column.

[0082] The preload spring is disposed between the first partition and the second partition, with one end abutting against the first partition and the other end abutting against the second partition, and is in a compressed state, so that the limiting ball abuts against the through hole at the center of the upper end face of the housing, and a portion of it is exposed outside the housing;

[0083] The first limiting rod and the second limiting rod have the same structure, both are L-shaped, and both include a long rod and a short rod. One end of the short rod and one end of the long rod are vertically fixedly connected, and the end of the long rod away from the short rod is provided with a pivot hole at a preset distance threshold.

[0084] The first limiting rod has its long end, away from the short end, extending into the cavity inside the housing through the first limiting through hole. At its long rod pivot hole, it is pivotally connected to the inner wall of the housing via the first pivot rod, allowing the short end to face upwards and the long end to rotate freely around the first pivot rod within the limiting through hole. The second limiting rod has its long end, away from the short end, extending into the cavity inside the housing through the second limiting through hole. At its long rod pivot hole, it is pivotally connected to the inner wall of the housing via the second pivot rod, allowing the short end to face upwards and the long end to rotate freely around the second pivot rod within the limiting through hole.

[0085] The first magnet is disposed on the lower wall inside the first pivot rod of the first limiting rod; the second magnet is disposed on the lower wall inside the second pivot rod of the second limiting rod; the third magnet is disposed inside the housing, opposite to the first magnet and repelling the first magnet; the fourth magnet is disposed inside the housing, opposite to the second magnet and repelling the second magnet.

[0086] When the limiting ball is pressed down, the pressure plate presses the inner side of the long rods of the first and second limiting rods, causing the short rods of the first and second limiting rods to move upward; when the limiting ball is released, the return spring, through the conduction column, causes the limiting ball to abut against the through hole at the center of the upper end face of the housing, and the pressure plate releases the first and second limiting rods. Under the action of the first to fourth magnets, the short rods of the first and second limiting rods move downward.

[0087] When the wheel diameter and tire width of the non-pneumatic wheel remain unchanged, the supports of the M telescopic units are aligned with the outer wall surface of the tire body. At this time, the roller brackets of the M telescopic units are located between the M drive spokes. The first drive roller and the second drive roller of each telescopic unit abut against the arc-shaped sidewalls of the drive spokes on both sides. The tips of the M drive spokes abut against and press down the limiting balls of the M locking units, so that the long rod of the first limiting rod of the locking unit passes through the through hole of the fourth connector of the telescopic unit on one side of the locking unit and locks the limiting hole of the third connecting rod of the telescopic unit on that side through the short rod of the first limiting rod. The long rod of the second limiting rod of the locking unit passes through the through hole of the first connector of the telescopic unit on the other side of the locking unit and locks the limiting hole of the second connecting rod of the telescopic unit on that side through the short rod of the second limiting rod.

[0088] When the diameter and width of the non-pneumatic wheel change, the servo motor causes the drive disc to rotate, the limiting balls of the M locking units are released by the M drive wheel spokes, and the second and third connecting rods of the M telescopic units are unlocked; at the same time, the M telescopic units move outward under the pressure of the M drive wheel spokes on their first and second drive rollers, and the support body is pushed outward until the tips of the M drive wheel spokes abut against the first and second limiting rollers of the M telescopic units.

[0089] The servo motor is a DC brushless motor; the wheel hub is made of alloy steel and is hollowed out to reduce wheel weight and component wear; the tread and support body are both made of aluminum material and have a polyurethane layer on the outer wall, which is bonded with HY-308 cold adhesive; M is preferred to be 6.

[0090] The locking unit may further include a fifth magnet and a sixth magnet;

[0091] The fifth magnet is disposed inside the housing, below the long rod of the first limiting rod outside the first pivot rod;

[0092] The sixth magnet is disposed inside the housing, below the long rod of the second limiting rod outside the second pivot rod;

[0093] The long rods of both the first and second limiting rods are made of magnetic material.

[0094] It will be understood by those skilled in the art that, unless otherwise defined, all terms used herein (including technical and scientific terms) have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. It should also be understood that terms such as those defined in general dictionaries should be understood to have the same meaning as in the context of the prior art, and should not be interpreted in an idealized or overly formal sense unless defined as herein.

[0095] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of the present invention. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A non-pneumatic wheel with variable wheel diameter and tire width, characterized in that, Includes tread, wheel hub, telescopic module, drive module, and locking module; The hub is disc-shaped with a through hole in the center for the central shaft to pass through, and M strip-shaped grooves pointing to its center are evenly distributed around its circumference, where M is a natural number greater than or equal to 3. The tread is a hollow cylinder with openings at both ends, and M telescopic through holes are evenly provided on its circumference. The wheel hub is coaxially arranged inside the tire tread, and the outer edge of the wheel hub is fixedly connected to the tire tread, so that the centers of the M strip-shaped through grooves and the M telescopic through holes correspond one-to-one; The telescopic module comprises M telescopic units; The telescopic unit includes a slider, a roller bracket, a first drive roller, a second drive roller, a first limit roller, a second limit roller, a support body, a support bracket, a reset spring, and first to fourth connecting parts. M telescopic units and M strip slots are arranged in a one-to-one correspondence. The slider is set in the corresponding strip groove of the telescopic unit and can slide freely along it; The reset spring is set in the strip-shaped groove, with one end fixedly connected to the hub inside the strip-shaped groove and the other end fixedly connected to the slider, and is in a stretched state; The first drive roller, the first limiting roller, the second limiting roller, and the second drive roller are coplanar, and their rotating shafts are all parallel to the hub axis. Both ends of the rotating shafts are fixed on the roller brackets, and the rotating shafts are sequentially arranged on a circle whose center is located on the hub axis. The first drive roller and the second drive roller are symmetrically arranged, as are the first limiting roller and the second limiting roller. The shape of the support body is the same as that of the telescopic through hole. Its outer wall is an arc-shaped side wall with the same curvature as the tire tread, and the center of the inner wall is fixedly connected to the support bracket and the roller bracket. The roller bracket and the slider are fixedly connected, so that when the slider slides outward, the support body moves outward relative to the tire tread, and when the slider slides inward, the support body can cooperate with its corresponding telescopic through hole to align the support body and the outer wall surface of the tire body. All of the first to fourth connecting members are plate-shaped. The first and second connecting members are located on one side of the support bracket, and the third and fourth connecting members are located on the other side of the support bracket. The first and fourth connecting members have the same structure, and the second and third connecting members have the same structure. One end of the first connecting member is hinged to the inner wall of the tread on one side of the telescopic through hole of the telescopic unit, and the other end is hinged to one end of the second connecting member. The other end of the second connecting member is hinged to the inner wall of the support member. One end of the third connecting member is hinged to the inner wall of the support member, and the other end is hinged to one end of the fourth connecting member. The other end of the fourth connecting member is hinged to the inner wall of the tread on the other side of the telescopic through hole of the telescopic unit. The first and fourth connecting members are provided with through holes for engaging the locking module, and the second and third connecting members are provided with limiting holes for engaging the locking module. The first and fourth connecting members are symmetrically arranged, and the second and third connecting members are symmetrically arranged. The drive module includes a servo motor, a central bearing, a central shaft, a drive disk, and M drive wheel spokes; The central bearing is disposed in the through hole at the center of the hub, the outer ring is coaxially and fixedly connected to the hub, and the inner ring is coaxially and fixedly connected to the central shaft. The servo motor is fixed on the hub, and its output shaft is coaxially and fixedly connected to the central shaft. The drive disk has a through hole in the center for the central shaft to pass through, and is fitted onto the central shaft and coaxially fixed to the central shaft; The M drive spokes are evenly arranged circumferentially on the drive disk; the root of the drive spoke is fixed to the drive disk and includes first to fourth sidewalls connected end to end in sequence, wherein the first and third sidewalls are outwardly convex arc surfaces, the second and fourth sidewalls are planes and perpendicular to the central axis, the first and third sidewalls are symmetrical and the tip of the drive spoke is rounded at the junction of the first and third sidewalls; The locking module comprises M locking units; The M locking units are arranged one-to-one on the inner wall of the tire tread between the M telescopic units, and each includes a housing, a limiting ball, a transmission column, a first partition, a second partition, a preload spring, a pressure plate, a first limiting rod, a second limiting rod, a first pivot rod, a second pivot rod, and a first to a fourth magnet. The shell is a cylinder with a cylindrical cavity coaxial with it; the upper end face of the shell has a through hole with a diameter smaller than that of the limiting ball at its center; the side wall of the shell has a first limiting through hole and a second limiting through hole that communicate with its inner cavity. Both the first and second partitions are circular, and each has a through hole in its center that mates with the conductive column. The conductive column is disposed in a cavity within the housing. The first partition is sleeved around the conductive column and is coaxially fixed to it. The second partition is disposed below the first partition and is coaxially fixed to the inner wall of the housing. The upper end of the conductive column is fixed to the limiting ball, and its axis passes through the center of the limiting ball. The lower end of the conductive column passes through the through hole in the center of the second partition and is perpendicularly fixed to the pressure plate. The diameter of the through hole in the center of the second partition is larger than the diameter of the cross-section of the conductive column. The preload spring is disposed between the first partition and the second partition, with one end abutting against the first partition and the other end abutting against the second partition, and is in a compressed state, so that the limiting ball abuts against the through hole at the center of the upper end face of the housing, and a portion of it is exposed outside the housing; The first limiting rod and the second limiting rod have the same structure, both are L-shaped, and both include a long rod and a short rod. One end of the short rod and one end of the long rod are vertically fixedly connected, and the end of the long rod away from the short rod is provided with a pivot hole at a preset distance threshold. The first limiting rod has its long end, away from the short end, extending into the cavity inside the housing through the first limiting through hole. At its long rod pivot hole, it is pivotally connected to the inner wall of the housing via the first pivot rod, allowing the short end to face upwards and the long end to rotate freely around the first pivot rod within the limiting through hole. The second limiting rod has its long end, away from the short end, extending into the cavity inside the housing through the second limiting through hole. At its long rod pivot hole, it is pivotally connected to the inner wall of the housing via the second pivot rod, allowing the short end to face upwards and the long end to rotate freely around the second pivot rod within the limiting through hole. The first magnet is disposed on the lower wall inside the first pivot rod of the first limiting rod; the second magnet is disposed on the lower wall inside the second pivot rod of the second limiting rod; the third magnet is disposed inside the housing, opposite to the first magnet and repelling the first magnet; the fourth magnet is disposed inside the housing, opposite to the second magnet and repelling the second magnet. When the limiting ball is pressed down, the pressure plate presses the inner side of the long rods of the first and second limiting rods, causing the short rods of the first and second limiting rods to move upward; when the limiting ball is released, the return spring, through the conduction column, causes the limiting ball to abut against the through hole at the center of the upper end face of the housing, and the pressure plate releases the first and second limiting rods. Under the action of the first to fourth magnets, the short rods of the first and second limiting rods move downward. When the wheel diameter and tire width of the non-pneumatic wheel remain unchanged, the supports of the M telescopic units are aligned with the outer wall surface of the tire body. At this time, the roller brackets of the M telescopic units are located between the M drive spokes. The first drive roller and the second drive roller of each telescopic unit abut against the arc-shaped sidewalls of the drive spokes on both sides. The tips of the M drive spokes abut against and press down the limiting balls of the M locking units, so that the long rod of the first limiting rod of the locking unit passes through the through hole of the fourth connector of the telescopic unit on one side of the locking unit and locks the limiting hole of the third connector of the telescopic unit on that side through the short rod of the first limiting rod. The long rod of the second limiting rod of the locking unit passes through the through hole of the first connector of the telescopic unit on the other side of the locking unit and locks the limiting hole of the second connector of the telescopic unit on that side through the short rod of the second limiting rod. When the diameter and width of the non-pneumatic wheel change, the servo motor causes the drive disc to rotate, the limiting balls of the M locking units are released by the M drive wheel spokes, and the second and third connecting rods of the M telescopic units are unlocked; at the same time, the M telescopic units move outward under the pressure of the M drive wheel spokes on their first and second drive rollers, and the support body is pushed outward until the tips of the M drive wheel spokes abut against the first and second limiting rollers of the M telescopic units.

2. The non-pneumatic wheel with variable wheel diameter and tire width according to claim 1, characterized in that, The servo motor is a DC brushless motor.

3. The non-pneumatic wheel with variable wheel diameter and tire width according to claim 1, characterized in that, The wheel hub is made of alloy steel.

4. The non-pneumatic wheel with variable wheel diameter and tire width according to claim 1, characterized in that, M is set to 6.

5. The non-pneumatic wheel with variable wheel diameter and tire width according to claim 1, characterized in that, The wheel hub is hollowed out to reduce wheel weight distribution and component wear.

6. The non-pneumatic wheel with variable wheel diameter and tire width according to claim 1, characterized in that, Both the tread and the support body are made of aluminum, and both have a polyurethane layer on their outer walls, which are bonded together with HY-308 cold adhesive.

7. The non-pneumatic wheel with variable wheel diameter and tire width according to claim 1, characterized in that, The locking unit also includes a fifth magnet and a sixth magnet; The fifth magnet is disposed inside the housing, below the long rod of the first limiting rod outside the first pivot rod; The sixth magnet is disposed inside the housing, below the long rod of the second limiting rod outside the second pivot rod; The long rods of both the first and second limiting rods are made of magnetic material.

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