Mechanical wheel

Abstract

The utility model provides a mechanical wheel, which belongs to the field of non-pneumatic tires and comprises an inner rim, an outer rim and a limit stop component arranged between the inner rim and the outer rim. A hinge is hinged between the inner rim and the outer rim; a reinforcing ring is arranged on the inner side face, close to the inner rim, of the outer rim. The reinforcing ring extends from the outer rim to the inner rim and is spaced from the inner rim; the limiting stop assembly further comprises a ball body and a baffle plate; the ball body is arranged in a mounting hole formed in the reinforcing ring, and the movement range of the ball body is limited by a limiting piece and is not separated from the mounting hole; and the other ends of the two baffles extend towards the outer rim until the two baffles are clamped on the two sides of the ball body and are separated from the ball body. The self-locking type mechanical wheel with the hinged structure solves the technical problem that an existing self-locking type mechanical wheel with the hinged structure does not have safety measures under dangerous and emergency conditions, can prevent the inner rim and the outer rim from being further staggered in the axial direction when a vehicle is subjected to lateral force during turning, and further guarantees driving safety of the vehicle.

Description

Technical Field

[0001] The utility model belongs to the field of non-pneumatic tires, and particularly relates to a mechanical wheel. Background Art

[0002] As a novel tire design concept, non-pneumatic tires have completely revolutionized the structure of traditional tires, aiming to replace the shock-absorbing functions of the existing vehicle suspension system and pneumatic tires. Its core transmission and shock-absorbing mechanisms involve the application of shock absorbers and hinges. Whether it is a shock absorber or a hinge, an articulated structure is adopted when connecting the inner and outer rims. However, different from the traditional articulated design, this articulated structure has significant differences in functional requirements. The traditional articulated design mainly focuses on how to ensure the smoothness and stability of the articulated movement. However, the articulated structure used to connect the inner and outer rims needs to cope with more complex and unique usage scenarios. During vehicle driving, especially when turning, due to the split design of the inner and outer rims, a huge deflection torque force will be generated between them, which will cause continuous left-right frictional impacts on the articulated part. This impact will inevitably lead to wear and loosening of the articulated part. The appearance of wear and loosening will first affect the lateral stability between the inner and outer rims, leading to potential positioning problems. More seriously, it may directly lead to the risk of separation at the articulated part. These safety hazards will undoubtedly increase the risk during vehicle driving and pose a threat to the safety of drivers and passengers.

[0003] Therefore, when designing and applying the articulated structure of this non-pneumatic tire, it is necessary to fully consider its durability and stability in actual use to ensure the driving safety of the vehicle. Before the hinge structure was applied to the relevant field, the traditional traction method mainly relied on shock absorbers and lateral limiting devices. However, this method will significantly increase the bearing burden of the shock absorber, thereby increasing the risk of its failure. To improve this situation, Chinese Patent CN113226791B innovatively introduced a hinge structure, aiming to reduce the stress load on the shock absorber and improve its stability.

[0004] However, in actual operation, we found that the size, length of the hinge structure and the layout positional relationship with the inner and outer rims all have crucial impacts on its performance. If the hinge structure is designed unreasonably or the layout is improper, it may not only cause collision with the outer rim during deflection, but also be difficult to achieve the ideal traction effect. In addition, given the complex and changeable driving road conditions and the unpredictability of emergencies, it is currently difficult to accurately determine the required strength of the hinge. Summary of the Utility Model

[0005] The details of one or more embodiments of the utility model are presented in the following drawings and description to make other features, purposes, and advantages of this application more concise and understandable.

[0006] The utility model provides a mechanical wheel, which solves the technical problem that the existing self-locking hinged structure mechanical wheel has no safety measures in dangerous emergency situations, and can prevent the inner rim and the outer rim from further axial position staggering when the vehicle is turning and subjected to lateral force, thereby ensuring the safety of vehicle driving.

[0007] The utility model discloses a mechanical wheel, comprising an inner rim, an outer rim, and a limit stop assembly arranged between the inner rim and the outer rim; a hinge is hinged between the inner rim and the outer rim;

[0008] A reinforcement ring is provided on the inner side surface of the outer rim close to the inner rim; the reinforcement ring extends from the outer rim to the inner rim and is spaced apart from the inner rim;

[0009] The limit stop assembly further includes a sphere and a baffle;

[0010] The sphere is arranged in the mounting hole provided on the reinforcement ring, and a limiter is used to limit the movement range of the sphere so that the sphere does not leave the mounting hole;

[0011] The two baffles are arranged at intervals and the distance between the two baffles is greater than the diameter of the sphere; one end of the two baffles is fixed to the outer side of the inner rim close to the outer rim, and the other end extends toward the outer rim until the two baffles are clamped on both sides of the sphere and are arranged at intervals from the sphere; when the hinge is deformed by the force applied, one side of the sphere contacts the baffle located on that side of the sphere.

[0012] In some embodiments, the limiting member includes two clamps; the two clamps are fixedly connected to the two sides of the reinforcement ring in the circumferential direction of the mounting hole; the two clamps are located within the range of the mounting hole and have limiting through holes of the same shape and size relatively opened therein; the sphere is arranged in the mounting hole opened on the reinforcement ring, and does not separate from the mounting hole under the limitation of the limiting through hole, and the sphere partially protrudes out of the limiting through hole.

[0013] In some embodiments, the arc diameter of the limiting through holes located on both side surfaces of the clamp is smaller than the diameter of the sphere; the arc diameter of the limiting through holes located inside the clamp is larger than the diameter of the sphere.

[0014] In some embodiments, the distances between the two baffles and the sphere are the same, and the distance between each baffle and the sphere is the maximum elastic deformation of the hinge.

[0015] In some of the embodiments, the inner rim is connected to the outer rim via a plurality of gas springs of a gas suspension.

[0016] In some of these embodiments, the diameter of the sphere is selected from any value in the range of 20 - 40 mm; the distance between each baffle and the sphere is 1 / 30 of the diameter of the sphere.

[0017] In some of these embodiments, the arc diameter of the limiting through-hole on the two side surfaces of the splint is 29 / 30 of the diameter of the sphere; the arc diameter of the limiting through-hole inside the splint is 31 / 30 of the diameter of the sphere.

[0018] In some of these embodiments, the reinforcing rings are circumferentially distributed along the outer rim, and a number of mounting holes are evenly formed in the circumferential direction of the reinforcing rings, and the number of the limiting and blocking components is the same as the number of the mounting holes.

[0019] In some of these embodiments, the baffle is an L-shaped baffle, and the L-shaped baffle includes a first bent portion and a second bent portion that are vertically connected. The first bent portion is fixedly connected to the inner rim, and the second bent portion extends toward the outer rim and is spaced apart from the outer rim.

[0020] In some of these embodiments, a rib plate is provided between the first bent portion and the second bent portion; the first bent portion is fixedly connected to the inner rim by screws; the splint is connected to the reinforcing ring by fastening bolts and nuts.

[0021] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0022] The utility model provides a mechanical wheel. By providing a limiting and blocking component, and further defining that the limiting and blocking component includes a sphere, a baffle, and the positional relationship between the sphere and the baffle, the hinge between the inner and outer rims will be subjected to a strong lateral deflection torque force during the turning process of the vehicle. When the hinge that resists these lateral forces is subjected to lateral forces, elastic or plastic deformation will occur, and the inner and outer rims will axially stagger relative to each other. At this time, the sphere on the outer rim reinforcing ring contacts the baffle on the inner rim, preventing further axial position staggering between the inner and outer rims. When the turning is over and the lateral force is unloaded, if the hinge undergoes elastic deformation, both the hinge and the limiting and blocking component will return to their original states, ensuring the safety during the driving process of the vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The drawings described herein are used to provide a further understanding of the present utility model and constitute a part of the present utility model. The schematic embodiments of the present utility model and their descriptions are used to explain the present utility model and do not constitute an improper limitation to the present utility model. In the drawings:

[0024] Figure 1 is a schematic structural diagram of the mechanical wheel provided by the embodiment of the present utility model;

[0025] Figure 2 Another perspective structural schematic diagram of the mechanical wheel provided by the embodiment of the present utility model;

[0026] Figure 3 Partial structural schematic diagram of the mechanical wheel provided by the embodiment of the present utility model;

[0027] Figure 4 is Figure 1 Cross-sectional view of part A in

[0028] Figure 5 Cross-sectional view of the limit stop assembly of the mechanical wheel provided by the embodiment of the present utility model;

[0029] In the above figures: 1, inner rim; 2, outer rim; 21, reinforcing ring; 3, limit stop assembly; 31, sphere; 32, baffle; 33, clamping plate; 34, rib plate; 35, screw; 36, fastening bolt; 37, nut. Specific embodiments

[0030] In order to make the objectives, technical solutions and advantages of the present utility model clearer, the present utility model will be described and explained below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments provided by the present utility model without creative efforts fall within the scope of protection of the present utility model.

[0031] The embodiment of the present utility model provides a mechanical wheel, Figure 1 , 2 is a structural schematic diagram of the mechanical wheel according to the embodiment of the present utility model. Referring to Figure 1 , 2 as shown, the mechanical wheel at least includes an inner rim 1, an outer rim 2, and a limit stop assembly 3 provided between the inner rim 1 and the outer rim 2; a hinge is hinged between the inner rim 1 and the outer rim 2; a reinforcing ring 21 is provided on the inner side surface of the outer rim 2 close to the inner rim 1; the reinforcing ring 21 extends from the outer rim 2 towards the inner rim 1 and is spaced from the inner rim 1; as Figure 3 , 4 shown, the limit stop assembly 3 further includes a sphere 31 and a baffle 32; the sphere 31 is arranged in an installation hole opened on the reinforcing ring 21, and the movement range of the sphere 31 is limited by a limiting member so as not to break away from the installation hole; the two baffles 32 are spaced apart and the distance between the two baffles 32 is greater than the diameter of the sphere 31; one end of the two baffles 32 is fixed to the outer side surface of the inner rim 1 close to the outer rim 2, and the other end extends towards the outer rim 2 until the two baffles 32 are clamped on both sides of the sphere 31 and are spaced from the sphere 31; when the hinge is deformed under the action of a force, one side of the sphere 31 contacts the baffle 32 located on that side of the sphere 31.

[0032] By providing a limit stop assembly 3 on the mechanical wheel and further defining the position relationship between the spherical body 31, the baffle 32 that make up the limit stop assembly 3, during the turning process of the vehicle, the hinge between the inner and outer rims 2 will be subjected to a strong lateral deflection torque force. When the hinge that resists these lateral forces is subjected to lateral forces, it will undergo elastic or plastic deformation, causing the inner and outer rims 2 to axially stagger relative to each other. At this time, the spherical body 31 on the reinforcing ring 21 of the outer rim 2 contacts the baffle 32 on the inner rim 1, preventing further axial position staggering of the inner and outer rims 2. After the turning is completed and the lateral force is unloaded, if the hinge undergoes elastic deformation, both the hinge and the limit stop assembly 3 will return to their original states, ensuring the safety of the vehicle during driving.

[0033] It should be noted that when the vehicle turns, the tire is not only subjected to a normal force perpendicular to its surface but also a lateral force perpendicular to the forward direction of the mechanical wheel and pointing towards the inside of the turn. This lateral force is mainly generated by the friction between the tread and the ground, and its magnitude is related to factors such as the tire's side slip angle, the friction coefficient between the tire and the ground, the vertical load of the tire, and the turning radius of the vehicle. The main material of the tread part of the mechanical wheel is polyurethane. Compared with natural rubber, the friction coefficient of polyurethane is significantly larger, which means that under the same conditions, compared with the tread of traditional tires, the polyurethane tread is more likely to generate a larger frictional force, resulting in a larger lateral force on the mechanical wheel. When the hinge that resists these lateral forces is subjected to lateral forces, it will undergo elastic or plastic deformation. To prevent excessive deformation of the hinge from having an adverse effect on the mechanical wheel, the spherical body 31 and the baffle 32 are respectively installed on the reinforcing ring 21 and the inner rim 1 of the mechanical wheel. When the inner rim 1 and the outer rim 2 are staggered and reach a certain value, the spherical body 31 contacts and collides with the baffle 32 along the central axis, preventing further staggering of the inner and outer rims 2 and avoiding major accidents. In the vertical direction, the contact area between the spherical surface of the spherical body 31 and the baffle 32 is extremely small, and the rolling friction received is extremely small, far lower than the sliding friction generated by other shaped objects, and hardly hinders the relative up and down movement of the inner and outer rims 2. When the spherical body 31 is subjected to an impact force at any point, due to the inherent characteristics of the spherical body 31, the received force can be evenly dispersed in all directions, reducing local stress and maintaining the stability of the entire wheel.

[0034] In addition, the above embodiments also limit that the limit stop assembly 3 is applicable to a mechanical wheel including a hinge. The reasons are as follows: 1. It can protect the hinge: The hinge is a weak link in the mechanical structure and is prone to excessive deformation or damage when subjected to lateral forces. The limit stop assembly can limit the movement range of the hinge, prevent the hinge from being subjected to huge lateral forces when turning, and thus protect the hinge from damage. 2. Extend the service life: The limit stop assembly helps to reduce the wear of the hinge and other mechanical components, thereby extending their service life, which is very important for improving the overall economic efficiency of the equipment. 3. Improve reliability: By restricting the movement of the hinge, the limit stop assembly can improve the reliability of the entire mechanical system. It ensures that the hinge and other components work within the designed range, thereby reducing the possibility of failures.

[0035] To further ensure that the sphere 31 moves within the range of the mounting hole without disengaging from the mounting hole on the reinforcing ring 21 and at the same time ensure the buffering effect generated by the contact between the sphere 31 and the baffle 32, the limiting member includes two clamping plates 33; the two clamping plates 33 are respectively fixedly connected to both sides of the reinforcing ring 21 circumferentially around the mounting hole; the two clamping plates 33 are provided with limiting through holes having the same shape and size opposite to each other within the range of the mounting hole; the sphere 31 is arranged in the mounting hole opened on the reinforcing ring 21 and is restricted by the limiting through holes and does not disengage from the mounting hole, and a part of the sphere 31 protrudes from the limiting through hole. As Figure 5 shown, the arc diameter of the limiting through hole on the two side surfaces of the clamping plate 33 is smaller than the diameter of the sphere 31; the arc diameter of the limiting through hole inside the clamping plate 33 is larger than the diameter of the sphere 31. Among them, the clamping plate 33 is connected to the reinforcing ring 21 through a fastening bolt 36 and a nut 37. Further, four sets of fastening bolts 36 and nuts 37 are threadedly connected inside the two clamping plates 33 that limit the movement range of the sphere 31 to improve the connection stability.

[0036] To ensure the safety of the vehicle during driving as much as possible, the distances between the two baffles 32 and the sphere 31 are the same, and the distance between each baffle 32 and the sphere 31 is the maximum deformation amount of the elastic deformation of the hinge. The limit stop assembly 3 of this structure not only avoids the hinge from undergoing inelastic deformation due to excessive lateral deflection torque or lateral force as much as possible, but also, even in extreme cases, can play a crucial safety guarantee role like the protection of the airbag for vehicle occupants, serving as an insurance measure to cope with dangerous emergency situations.

[0037] In some of these embodiments, the inner rim 1 and the outer rim 2 are connected by a plurality of gas springs of gas suspensions. The limiting stop assembly 3 provided by the present utility model is applicable to a self-locking articulated structure mechanical wheel. Optionally, the inner and outer rims 2 of the mechanical wheel are connected by a plurality of gas springs of gas suspensions and a hinge that restricts the relative movement of the inner and outer rims 2. Further, when the inner and outer rims 2 of the mechanical wheel are connected by a plurality of gas springs of gas suspensions and a hinge that restricts the relative movement of the inner and outer rims 2, the diameter of the sphere 31 is selected from any value in the range of 20 - 40 mm, which can meet the safety guarantee of this type of mechanical wheel; the distance between each baffle 32 and the sphere 31 is 1 / 30 of the diameter of the sphere 31. It can be understood that the diameter of the sphere 31 can also be 25 mm, 30 mm, 35 mm, and any point value within this range. At the same time, the arc diameter of the limiting through hole on both side surfaces of the splint 33 is 29 / 30 of the diameter of the sphere 31; the arc diameter of the limiting through hole inside the splint 33 is 31 / 30 of the diameter of the sphere 31.

[0038] To ensure the stability and reliability during the running of the tire, the reinforcing ring 21 is distributed circumferentially along the outer rim 2, and a number of mounting holes are evenly opened circumferentially on the reinforcing ring 21. The number of the limiting stop assemblies 3 is the same as the number of the mounting holes. Optionally, both the number of the mounting holes and the number of the limiting stop assemblies 3 are 6. A high-integration treatment is carried out for the layout of the 6 baffles 32 and the sphere 31 to reduce the corresponding hinge points. By setting the central axis of the cross-section of the baffle 32 on the same reference plane, the force application points are all on one reference plane, the force is more evenly distributed, the structure of the hinge and the limiting baffle 32 is more stable, the service life of the parts is greatly extended, and the stability and reliability during the running of the tire are ensured.

[0039] To further ensure the firmness of the connection and the convenience of installation, the baffle 32 is an L-shaped baffle 32. The L-shaped baffle 32 includes a first bent portion and a second bent portion that are vertically connected. The first bent portion is fixedly connected to the inner rim 1, and the second bent portion extends towards the outer rim 2 and is spaced apart from the outer rim 2; a rib plate 34 is provided between the first bent portion and the second bent portion; the first bent portion is fixedly connected to the inner rim 1 by screws 35.

[0040] The installation process of the above-mentioned mechanical wheel is as follows:

[0041] Put the sphere 31 into the mounting hole of the reinforcing ring 21 of the outer rim 2 and fix it with two layers of splints 33, and use bolts and nuts 37 to tighten the splints 33; then fasten the limiting L-shaped baffle 32 to the inner rim 1 with set screws 35.

[0042] The working process of the above-mentioned mechanical wheel is as follows:

[0043] When the inner rim 1 and the outer rim 2 are staggered in position and reach a certain value, the axial limiting sphere 31 contacts and collides with the baffle 32 along the center axis, preventing the further staggering of the inner and outer rims 2 and avoiding major accidents. In the vertical direction, the contact area between the spherical surface and the limiting L-shaped baffle 32 is extremely small, and the rolling friction received is extremely small, far lower than the sliding friction generated by other shaped objects, and there is almost no hindrance to the relative up and down movement of the inner and outer rims 2. When the limiting sphere 31 is impacted at any place, due to the inherent characteristics of the sphere 31, the received force can be evenly dispersed in all directions, reducing local stress and maintaining the stability of the whole wheel.

[0044] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of concise description, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope recorded in this specification.

[0045] The above-described embodiments only represent several implementation manners of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the utility model patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several deformations and improvements can still be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the utility model patent shall be subject to the appended claims.

Claims

1. A mechanical wheel, characterized in that, The wheel assembly comprises an inner wheel rim, an outer wheel rim, and a limit stop assembly arranged between the inner wheel rim and the outer wheel rim; a hinge is hinged between the inner wheel rim and the outer wheel rim; A reinforcement ring is provided on the inner side surface of the outer rim close to the inner rim; the reinforcement ring extends from the outer rim to the inner rim and is spaced apart from the inner rim; The limit stop assembly further comprises: A sphere, the sphere being arranged in a mounting hole provided on the reinforcement ring, and a limiter is used to limit the movement range of the sphere so that the sphere does not leave the mounting hole; A baffle, the two baffles are arranged at intervals and the distance between the two baffles is greater than the diameter of the sphere; one end of the two baffles is fixed to the outer side of the inner rim close to the outer rim, and the other end extends toward the outer rim until the two baffles are clamped on both sides of the sphere and are arranged at intervals from the sphere; when the hinge is deformed by the force applied, one side of the sphere contacts the baffle located on that side of the sphere.

2. The mechanical wheel according to claim 1, wherein, The limiting component includes two clamping plates; the two clamping plates are fixedly connected to the two sides of the reinforcement ring in the circumferential direction of the mounting hole; the two clamping plates are located within the range of the mounting hole and are provided with limiting through holes of the same shape and size; the sphere is arranged in the mounting hole opened on the reinforcement ring, and does not separate from the mounting hole under the limitation of the limiting through hole, and the sphere partially protrudes out of the limiting through hole.

3. The mechanical wheel according to claim 2, wherein, The arc diameter of the limiting through holes located on both side surfaces of the clamping plate is smaller than the diameter of the sphere; the arc diameter of the limiting through holes located inside the clamping plate is larger than the diameter of the sphere.

4. The mechanical wheel according to claim 1, characterized in that, The distances between the two baffles and the sphere are the same, and the distance between each baffle and the sphere is the maximum elastic deformation of the hinge.

5. The mechanical wheel according to claim 4, wherein, The inner rim is connected to the outer rim via a plurality of gas springs of a gas suspension.

6. The mechanical wheel according to claim 5, characterized in that, The diameter of the sphere is selected from any value between 20 and 40 mm; the distance between each baffle and the sphere is 1 / 30 of the diameter of the sphere.

7. The mechanical wheel according to claim 6, characterized in that, The arc diameter of the limiting through holes located on both side surfaces of the clamp is 29 / 30 of the diameter of the sphere; the arc diameter of the limiting through holes located inside the clamp is 31 / 30 of the diameter of the sphere.

8. The mechanical wheel according to claim 1, characterized in that, The reinforcement ring is distributed along the circumference of the outer rim, and a plurality of mounting holes are evenly opened along the circumference of the reinforcement ring. The number of the limit stop assemblies is the same as the number of the mounting holes.

9. The mechanical wheel according to claim 2, wherein The baffle is an L-shaped baffle, and the L-shaped baffle includes a first bent portion and a second bent portion that are vertically connected, the first bent portion is fixedly connected to the inner rim, and the second bent portion extends toward the outer rim and is spaced apart from the outer rim.

10. The mechanical wheel according to claim 9, characterized in that, A rib plate is provided between the first bending portion and the second bending portion; the first bending portion is fixedly connected to the inner rim by screws; and the clamping plate is connected to the reinforcement ring by fastening bolts and nuts.

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